Surface Water Supply of the United States, 1966-70

Part 11. Pacific Slope Basins in

Volume 1. Basins From River to Santa Maria River

GEOLOGICAL SURVEY WATER-SUPPLY PAPER 2128 Prepared in cooperation with the State of California and with other agencies

UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1976 UNITED STATES DEPARTMENT OF THE INTERIOR

THOMAS S. KLEPPE, Secretary

GEOLOGICAL SURVEY

V. E. McKelvey, Director

Library of Congress catalog-card No. GS 76-608285

For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 Stock Number 024-001-02773-9 PREFACE

This report was prepared by the U.S. Geological Survey in cooperation with the State of California and other agencies, by personnel of the Water Resources Division, J. S. Cragwall, Jr., chief hydrologist, G. W. Whetstone, assistant chief for Scientific Publications and Data Management, under the general direction of G. A. Billingsley, chief, Reports Section, and B. A. Anderson, chief, Data Reports Unit.

The data were collected and computed under supervision of L. R. Peterson, district chief, Water Resources Division, Menlo Park, Calif.

Ill

Page Preface...... Ill List of gaging stations, in downstream order, for which records are published...... VI Scope of work...... 1 Cooperation...... 1 Division of work...... 2 Definition of terms and abbreviations ...... 2 Downstream order and station number...... 3 Explanation of data...... 3 Accuracy of field data "and computed results...... 7 Publications...... '...... 7 Other data available...... 11 Records of discharge collected by agencies other than the Geological Survey...... 12 Gaging-station r cords ...... "...... 13 Discharge at par ial-record stations ...... 537 Crest-stage pa tial-record stations...... 537 Santa Ana Rive seepage investigations...... 541 Santa Ana Rive absorption studies ...... 543 Index...... 549

ILLUSTRATIONS Page Figure 1. Map of the United States showing area covered by the volumes in the series on surface-water supply...... 8 Figure 2. Schematic diagram showing diversions and storage in Santa Ana River basin...... 129 Figure 3. Schematic diagram showing diversions and storage in San Gabriel and Los Angeles River basins ...... RAGING STATIONS, IN DOWNSTREAM ORDER, FOR WHICH RECORDS ARE PUBLISHED

PACIFIC SLOPfc BASINS IN CALIFORNIA BASIN Page Cottonwood Creek (head of Tijuana River) at Horena Dam, Calif...... 13 Wilson Creek: Wilson Creek tributary near Dulzura, Calif...... 14 Cottonwood Creek at , near Dulzura, Calif...... 14 Potrero Creek: Potrero Creek tributary near Barrett Junction, Calif...... 15 Cottonwood Creek above Creek, near Dulzura, Calif...... 16 Tecate Creek: Campo Creek near Campo, Calif...... 19 Tijuana River near Dulzura, Calif...... 21 Rio de las Palmas: Tijuana River near Nestor, Calif...... !...... !...... 25 OTAY RIVER BASIN Jamul Creek (head of Otay River) near Jamul, Calif...... 26 SWEETWATER RIVER BASIN Sweetwater River: Japacha Creek near Descanso, Calif...... 29 Sweetwater River near Descanso, Calif...... 31 Sweetwater River at , near Alpine, Calif...... 36 Sweetwater River at , Calif...... 37- RIVER BASIN San Diego River: Boulder Creek at Cuyamaca Reservoir, near Julian, Calif...... 38 San Diego River at , Calif...... '..... 39 San Diego River near Santee, Calif...... 40 LOS PENASQUITOS CREEK BASIN Los Penasquitos Creek near Poway, Calif...... 43 SAN DIEGUITO RIVER BASIN Santa Ysabel Creek (head o f San Dieguito River) at Sutherland Dam, Calif...... 46 Santa Ysabel Creek near Ramona, Calif...... 47 Santa Ysabel Creek near San Pasqual, Calif...... 50 Guejito Creek near San Pasqual, Calif...... 53 Santa Maria Creek near Ramona, Calif,...... 56 San Dieguito River near San Pasqual, Calif...... 59 San Dieguito River at , Calif...... 60 SAN LUIS REY RIVER BASIN San Luis Rey River: Agua Caliente Creek near Warner Springs, Calif...... 61 West Fork San Luis Rey River near Warner Springs, Calif...... 64 San Luis Rey River at , near Mesa Grande, Calif...... 67 Pauma Creek near Pauma Valley, Calif...... 68 San Luis Rey River tributary near Pala, Calif...... 74 San Luis Rey River at Monserate Narrows, near Pala, Calif...... 75 San Luis Rey River near Bonsall, Calif...... 78 San Lui's Rey River at Oceanside, Calif...... 81 SANTA MARGARITA RIVER BASIN Temecula Creek (head of Santa Margarita River) near Aguanga, Calif...... 84 Temecula Creek at Vail Dam, Calif...... 87 Hurrieta Creek at Temecula, Calif...... 88 Santa Margarita River near Temecula, Calif...... 91 Santa Margarita River near Fallbrook, Calif...... 94 De Luz Creek near Fallbrook, Calif...... 97 Santa Margarita River at Ysidora, Calif...... 99 LAS FLORES CREEK BASIN Las Flores Creek near Oceanside, Calif...... 102 SAN ONOFRE CREEK BASIN San Onofre Creek near San Onofre, Calif...... 104 San Onofre Creek at San Onofre , Calif...... 106 SAN MATED CREEK BASIN San Mateo Creek near San Clemente, Calif...... 107 Cristianitos Creek near San Clemente, Calif...... 109 San Mateo Creek at San Onofre, Calif...... Ill SAN JUAN CREEK BASIN San Juan Creek near San Juan Capistrano, Calif...... 113 Arroyo Trabuco near San Juan Capistrano, Calif...... 119 Oso Creek at Crown Valley Parkway, near Mission Viejo, Calif...... 122 ALISO CREEK BASIN Aliso Creek at El Toro, Calif...... 123 PETERS CANYON WASH BASIN Peters Canyon Wash: San Diego Creek near Irvine, Calif...... 126 SANTA ANA RIVER BASIN Santa Ana River: Bear Creek: ake near Big Bear Lake, Calif...... 130 ver near Mentone, Calif...... 131 Santa Ana River spreading diversion near Mentone, Calif...... 137 Mill Cree near Yucaipa, Calif...... :...... 140 Plunge Cr ek near East Highlands, Calif...... 146 City Cree near Highland, Calif...... 152 Santa Ana R ver at Waterman Avenue, at San Bernardino, Calif...... 158 San Timot o Creek: Little an Gorgonio Creek near Beaumont, Calif...... 161 San Timot o Creek near Redlands, Calif...... 164 San Timot o Creek near Loma Linda, Calif...... 165 Warm Cree : East Tw n Creek near Arrowhead Springs, Calif...... 167 Waterman Canyon Creek near Arrowhead Springs, Calif...... 170 Warm Creek floodway at San Bernardino, Calif...... 173 Santa Ana River at E Street, near San Bernardino, Calif...... 176 Warm Creek near San Bernardino, Calif...... 179 Meeks and Daley Canal near Colton, Calif...... 180 Lytle Creek near Fontana Calif ...... 183 Cajon Creek near Keenbrook, Calif.!....!...... 189 Lone Pine Creek near Keenbrook, Calif...... 192 Devil Canyon Creek near San Bernardino, Calif...... 195 Lytle Creek at Colton, Calif...... 198 Santa Ana River at Colton, Calif...... 201 Santa Ana River at MWD Crossing, near Arlington, Calif...... 202 Riverside Water Quality Control Plant at Riverside Narrows, near Arlington, Calif...... 203 GAGING STATIONS, IN DOWNSTREAM ORDER, FOR WHICH RECORDS ARE PUBLISHED VII

PACIFIC SLOPE BASINS IN CALIFORNIA--Continued SANTA ANA RIVER BASIN--Continued Page Santa Ana River at Riverside Narrows, near Arlington, Calif...... 206 Day Creek near Etiwanda, Calif...... 209 Santa Ana River at Auburndale Bridge, near Corona, Calif...... 215 South Fork San Jacinto River: Lake Hemet near Idyllwild, Calif...... 217 South Fork San Jacinto River: South Fork San Jacinto River tributary near Valle Vista, Calif...... 218 San Jacinto River near San Jacinto, Calif...... 219 Bautista Creek near Hemet, Calif...... 225 Bautista Creek near Valle Vista, Calif...... 226 Perris Valley Storm Drain at Nuevo Road, near Perris, Calif...... 227 San Jacinto River near Elsinore, Calif...... 228 Elsinore Lake at Elsinore, Calif...... 231 Temescal Creek near Corona, Calif...... 231 Temescal Creek at Corona, Calif...... 234 Chino Creek: San Antonio Creek near Claremont, Calif...... 236 San Antonio Creek below San Antonio Dam, Calif...... 242 Chino Creek at Schaefer Avenue, near Chino, Calif...... 245 Chino Creek near Chino, Calif...... 246 Cucamonga Creek near Upland, Calif...... 248 Cucamonga Creek near Mira Loma, Calif...... 251 Santa Ana River below Prado Dam, Calif...... 253 Carbon Creek below Carbon Canyon Dam, Calif...... 256 Santiago Creek at Modjeska, Calif...... 257 Santiago Creek at Santiago Dam, near Villa Park, Calif...... 260 Santiago Creek at Santa Ana, Calif...... 261 Santa Ana River at Santa Ana, Calif...... 263 SAN GABRIEL RIVER BASIN East Fork San Gabriel River near Camp Bonita, Calif...... 267 West Fork San Gabriel River at Camp Rincon, Calif...... 270 San Gabriel River near Azusa, Calif...... 273 Fish Creek near Duarte, Calif...... 274 San Gabriel River below Santa Fe Dam, near Baldwin Park, Calif...... 277 Walnut Creek: Dalton Creek: San Dimas Creek below San Dimas Dam, Calif...... 280 Little Dalton Creek near Glendora, Calif...... 283 San Jose Creek near El Monte, Calif...... 286 San Gabriel River above Whittier Narrows Dam, Calif...... 289 Rio Hondo flood-flow channel at Whittier Narrows Dam, Calif...... 292 San Gabriel River at Pico, Calif...... 295 San Gabriel River at Spring Street, near Los Alamitos, Calif...... 298 Coyote Creek: Brea Creek below Brea Dam, near Fullerton, Calif...... 301 Brea Creek at Fullerton, Calif...... 304 Fullerton Creek below Fullerton Dam, near Brea, Calif...... 307 Fullerton Creek at Richman Avenue, at Fullerton, Calif...... 310 Coyote Creek at Los Alamitos, Calif...... 313 LOS ANGELES RIVER BASIN Los Angeles River at Sepulveda Dam, Calif...... 316 Pacoima Creek near San Fernando, Calif...... 319 Tujunga Creek: Mill Creek: North Fork Mill Creek near La Canada, Calif...... 322 Tujunga Creek below Mill Creek, near Colby Ranch, Calif...... 325 Tujunga Creek near Sunland, Calif...... 328 Little Tujunga Creek near San Fernando, Calif...... 331 Tujunga Creek below Hansen Dam, Calif...... 334 Los Angeles River at Los Angeles, Calif...... 337 Arroyo Seco near Pasadena, Calif...... 340 Los Angeles River near Downey, Calif...... 343 Rio Hondo: Santa Anita Creek near Sierra Madre, Calif...... 346 Eaton Creek near Pasadena, Calif...... 349 Rio Hondo above Whittier Narrows Dam, Calif...... 350 Rio Hondo near Montebello, Calif...... 353 Mission Creek near Montebello, Calif...... 356 Mission Creek below Whittier Narrows Dam, Calif...... 359 Rio Hondo below Nhittier Narrows Dam, Calif...... 362 Rio Hondo near Downey, Calif...... 365 Los Angeles River at Long Beach, Calif...... 368 BALLONA CREEK BASIN Ballona Creek near Culver City, Calif...... 371 TOPANGA CREEK BASIN Topanga Creek near Topanga Beach, Calif...... 374 MALIBU CREEK BASIN Malibu Creek at Crater Camp, near Calabasas , Calif...... 377 CALLEGUAS CREEK BASIN Calleguas Creek: Arroyo Simi near Simi, Calif...... 380 Calleguas Creek at Camarillo State Hospital, Calif...... 382 SANTA CLARA RIVER BASIN Santa Clara River at Los Angeles-Ventura County line, Calif...... 384 Piru Creek above Lake Piru, Calif...... 387 Lake Piru near Piru, Calif...... 390 Piru Creek near Piru, Calif...... 391 Hopper Creek near Piru, Calif...... 394 Sespe Creek near Wheeler Springs, Calif...... 397 Sespe Creek near Fillmore, Calif...... 400 Santa Paula Creek near Santa Paula, Calif...... 406 Saticoy diversion near Saticoy, Calif...... 409 Santa Clara River at Montalvo, Calif...... '...... 410 VENTURA RIVER BASIN Matilija Creek [head of Ventura River) above reservoir, near Matilija Hot Springs, Calif.... 414 Matilija Creek at Matilija Hot Springs, Calif...... 417 North Fork Matilija Creek at Matilija Hot Springs, Calif...... 420 Ventura River near Meiners Oaks.Calif...... 423 San Antonio Creek at Casitas Springs, Calif...... 426 Coyote Creek near Oak View, Calif...... 429 Santa Ana Creek near Oak View, Calif...... 432 Coyote Creek near Ventura, Calif...... 435 Ventura River near Ventura, Calif...... '...... 436 GAGING STATIONS, IN DOWNSTREAM ORDER, FOR WHICH RECORDS ARE PUBLISHED

PACIFIC SLOPE BASINS IN CALIFORNIA--Continued CARPINTERIA CREEK BASINPage Carpinteria Creek near Carpinteria, Calif...... 442 ATASCADERO CREEK BASIN Atascadero Creek near Goleta, Calif...... 445 SAN JOSE CREEK BASIN San Jose Creek near Goleta, Calif...... 448 GAVIOTA CREEK BASIN Gaviota Creek near Gaviota, Calif...... 451 JALAMA CREEK BASIN Jalama Creek near Lompoc, Calif...... '..... 454 SANTA YNEZ RIVER BASIN Santa Ynez River a Jameson Lake, near Montecito, Calif...... 457 Santa Ynez River a ove Gibraltar Dam, near Santa Barbara, Calif...... 459 Santa Ynez River b low Gibraltar Dam, near Santa Barbara, Calif...... 460 Santa Ynez River b low Los Laureles Canyon, near Santa Ynez, Calif...... 463 Santa Cruz Creek near Santa Ynez, Calif...... 466 Lake Cachuma near anta Ynez, Calif...... 469 Santa Ynez River n ar Santa Ynez, Calif...... 471 Santa Agueda Cre k near Santa Ynez, Calif...... 474 Alisal Creek nea Solvang, Calif...... 477 Santa Ynez River a Solvang, Calif...... 480 Zaca Creek near uellton, Calif...... 483 Santa Ynez River n ar Buellton, Calif...... 485 Santa Ynez River a Cooper's Reef, near Lompoc, Calif...... 488 Salsipuedes Cree near Lompoc, Calif...... 491 Santa Ynez River a narrows, near Lompoc, Calif...... 494 Santa Ynez River a 13th Street, near Lompoc, Calif...... 497 Santa Ynez River a Pine Canyon, near Lompoc, Calif...... 500 SAN ANTONIO CREEK BASIN San Antonio Creek near Casmalia, Calif...... 503 San Antonio Creek tributary near Casmalia, Calif...... 506 SANTA MARIA RIVER BASIN Cuyama River (head of Santa Maria River): Aliso Canyon Creek near New Cuyama, Calif...... 507 Cuyama River below Buckhorn Canyon, near Santa Maria, Calif...... 508 Alamo Creek near Nlpomo, Calif...... 511 Huasna River near Arroyo Grande, Calif...... 514 Cuyama River below Twitchell Dam, Calif...... 517 Sisquoc River near Sisquoc, Calif...... 520 La Brea Creek near Sisquoc, Calif...... 523 Foxen Creek near Sisquoc, Calif...... 526 Tepusquet Creek near Sisquoc, Calif...... 529 Sisquoc River nt..r Garey, Calif...... 532 Santa Maria River at Guadalupe, Calif...... 535 PACIFIC SLOPE BASINS IN CALIFORNIA FROM TIJUANA RIVER TO SANTA MARIA RIVER

SCOPE OF WORK

This report is one of a series of 37 reports presenting records of stage and discharge of streams, and of stage and contents of lakes and reservoirs in the United States during the 1966-70 water years; it contains the records for gaging stations and partial-record stations in the Pacific slope basins in California from Tijuana River to Santa Maria River.

Since 1888, when the U.S. Geological Survey first studied streamflow in relation to problems of irrigation, similar records have been obtained at more than 19,500 gaging stations in the 50 States. On September 30, 1970, the Geological Survey and cooperating organizations were maintaining 10,000 gaging stations. Partial-record stations for low flow or for floodflow have been operated at many other points.

COOPERATION

Many State, municipal, and private organizations have cooperated with the Geological Survey in this work by either furnishing or helping to collect data. Organizations that assisted in the collection of data through cooperative agreements with the Survey in California are as follows:

California Department of Water Resources; Monticito County Water District; Orange County Flood Control District; Riverside County Flood Control and Water Conservation District; San Bernardino Valley Municipal Water District; San Bernardino Valley Conservation District; San Diego County, Department of Sanitation and Flood Control; City of San Diego, Utilities Department; Santa Barbara City Water Department; Santa Barbara County Water Agency; Santa Maria Valley Water Conservation District; Santa Ynez River Conservation District; Ventura County Department of Public Works; and Ventura County Municipal Water District.

Assistance in the form of funds and services was given by the Corps of Engineers, U.S. Army, in collecting records published herein; by the U.S. Navy; and by the Bureau of Reclamation, U.S. Department of the Interior.

The following organizations aided in collecting records:

Bear Valley Mutual Water Company; Fontana Union Water Company; Helix Irrigation District; Irvine Ranch; Los Angeles County Flood Control District; Metropolitan Water District of California; Pacific Gas and Electric Company; Rancho California; Serrano and Carpenter Irrigation District; Southern California Edison Company; United Water Conservation District; Ventura County Flood Control District; and Vista Irrigation District.

Organizations that supplied data are acknowledged in station descriptions. 2 SURFACE WATER SUPPLY', 1966-70, PART II, VOLUME 1

DIVISION OF WORK

The stream-gaging work was done by the Water Resources Division of the Geological Survey under the direction of personnel cited in the preface. The data for stations in California were collected and prepared for publication in the district office located at 855 Oak Grove Avenue, Menlo Park, California 94025.

DEFINITION OF TERMS AND ABBREVIATIONS

Terms related to streamflow and other hydrologic data, as used in this report, are defined as follows:

ACRE-FOOT (AC-FT. ACRE-FT) is the quantity of water required to cover an acre to the depth of 1 foot and is equivalent to 43,560 cubic feet or about 326,000 gallons.

CFS-DAY is the volume of water represented by a flow of 1 cubic foot per second for 24 hours. It is equivalent to 86,400 cubic feet, approximately 1.9835 acre-feet, or about 646,000 gallons, and represents a runoff of approximately 0.0372 inch from 1 square mile.

CONTENTS is the volume of water in a reservoir or lake. Unless otherwise indicated, volume is computed on the basis of a level pool and does not include bank storage.

CONTROL designates a feature downstream from the gage that determines the stage-discharge relation at the gage. This feature may be a natural constriction of the channel, an artificial structure, or a uniform cross section over a long reach of the channel.

CUBIC FEET PER SECOND PER SQUARE MILE (CFSM) is the average number of cubic feet of water flowing per second from each square mile of area drained, assuming that the runoff is distributed uniformly in time and area.

CUBIC FOOT PER SECOND (CFS) is the rate of discharge representing a volume of 1 cubic foot passing a given point during 1 second and is equivalent to approximately 7.48 gallons per second or 448.8 gallons per minute.

DISCHARGE is the volume of water in a stream which passes a given point in a unit of time.

DRAINAGE AREA of a stream above a specified location is that area, measured in a horizontal plane, enclosed by a topographic divide from which direct surface runoff from precipitation normally drains by gravity into the river above the specified point. Figures of drainage area given herein include all closed basins, or noncontributing area, within the area unless otherwise noted.

GAGE HEIGHT is the surface-water elevation referred to some arbitrary gage datum. Gage height is often used interchangeably with the more general term "stage," although gage height is more appropriate when used with a reading on a gage.

GAGING STATION is a particular site on a stream, canal, lake, or reservoir where systematic observations of gage height or discharge are obtained. When used in connection with a discharge record, the term is applied herein only to those gaging stations where a continuous record of discharge is computed.

HYDROLOGIC BENCH-MARK STATION is one that provides hydrologic data for ' a basin in which the hydrologic regimes will likely be governed solely by natural EXPLANATION OF DATA 3

conditions. Data collected at a bench-mark station may be used to separate effects of natural from manmade changes in other basins which have been developed and in which the physiography, climate, and geology are similar to those in the undeveloped bench-mark basin.

INTERNATIONAL HYDROLOG1CAL DECADE (IHD) RIVER STATIONS provide a general index of runoff and materials in the water balance (discharge of water, and dissolved and transported solids) of the world. In the United States, IHD Stations provide indices of runoff and of the general distribution of water in the principal river basins of the conterminous United States and Alaska.

PARTIAL-RECORD STATION is a particular site where limited streamflow data are collected systematically over a period of years for use in hydrologic analyses.

RUNOFF IN INCHES (IN.) is the depth to which the drainage area would be covered if all the runoff for a given time period were uniformly distributed on it.

STAGE-DISCHARGE RELATION is the relation between gage height and the volume of water per unit of time flowing in a channel.

WSP is used as an abbreviation for "Water-Supply Paper" in reference to previously published reports.

DOWNSTREAM ORDER AND STATION NUMBER

Beginning with the series of reports for the water year ending September 30, 1951, the order of listing gaging-station records is in a downstream direction along the main stream. All stations on a tributary entering upstream from a main-stream station are listed before that station. A station on a tributary that enters between two main-stream stations is listed between them. A similar order is followed in listing stations on first rank, second rank, and other ranks of tributaries. The rank of any tributary on which a gaging station is situated with respect to the stream to which it is immediately tributary is indicated by an indention in a list of gaging stations. Each indention represents one rank. This downstream order and system of indention show which gaging stations are on tributaries between any two stations and the rank of the tributary on which each gaging station is situated.

The order of listing used before the publication of the 1951 report listed first all stations on the main stem from headwaters toward mouth, then all stations on the upper­ most tributary to the main stem from the tributary's source to mouth, and then all stations from source to mouth of the uppermost tributary to the tributary.

As an added means of identification, each gaging station and partial-record station has been assigned a station number. These are in the same downstream order used in this report. In assigning station numbers, no distinction is made between partial-record stations and gaging stations; therefore, the station number for a partial-record station indicates downstream-order position in a list made up of both types of stations. Gaps are left in the series of numbers to allow for new stations that may be established; hence, the numbers are not consecutive. The complete 8-digit number for each station such as 11098500, which appears just to the left of the station name, includes the 2-digit part number "11" plus the 6-digit downstream order number "098500". The part numbers refer to the areas whose boundaries are outlined in Figure 1.

EXPLANATION OF DATA

The base data collected at gaging stations consist of records of stage and measure­ ments of discharge of streams or canals, and stage, surface area, and contents of 4 SURFACE WATER SUPPLY, 1966-70, PART 11, VOLUME 1 lakes or reservoirs. In addition, observations of factors affecting the stage-discharge relation or the stage-capacity relation, weather records, and other information are used to supplement base data in determining the daily flow or volume of water in storage. Records of stage are obtained from direct readings on a nonrecording gage or from a water-stage recorder that gives either a continuous graph of the fluctuations or a tape punched at 15-, 30-, or 60-minute intervals. Measurements of discharge are made with a current meter, using the general methods adopted by the Geological Survey on the basis of experience in stream gaging since 1888. These methods are described in standard textbooks, in Water-Supply Paper 888, and in U.S. Geological Survey Techniques of Water Resources Investigations, book 3, chapter A6. Surface areas of lakes or reservoirs are determined from instrument surveys using standard methods. The configuration of the reservoir bottom is determined by sounding at many points.

For stream-gaging stations, rating tables giving the discharge-for any stage are prepared from stage-discharge relation curves. If extensions to the rating curves are necessary to express discharge greater than measured, they are made on the basis of indirect measurements of peak discharge (such as slope-area or contracted- opening measurements, computation of flow over dams or weirs), velocity-area studies, and logarithmic plotting. The daily mean discharge is computed from gage heights and rating tables, then the monthly and yearly mean discharge are computed from the daily figures. If the stage-discharge relation is subject to change because of frequent or continual change in the physical features that form the control, the daily mean discharge is computed by the shifting-control method, in which Correction factors based on individual discharge measurements and notes by engineers and observers are used in applying the gage heights to the rating tables. If the stage-discharge relation for a station is temporarily changed by the presence of aquatic growth or debris on the control, the daily mean discharge is computed by what is basically the shifting-control method."

At some gaging stations the stage-discharge relation is affected by the backwater from reservoirs, tributary streams, or other sources. This necessitates the use of the slope method in which the slope or fall in a reach of the stream is a factor in computing dis­ charge. The slope or fall is obtained by means of an auxiliary gage set at some distance from the base gage. At some stations the stage-discharge relation is affected by changing stage; at these stations the rate of change in. stage is used as a factor in computing discharge.

At some stream gaging stations the stage-discharge relation is affected by ice in the winter, and it becomes impossible to compute the discharge in the usual manner. Discharge for periods of ice effect is computed on the basis of gage-height record and occasional winter discharge measurements, consideration being given to the available information on temperature and precipitation, notes by gage observers and hydrologists, and comparable records of discharge for other stations in the same or nearby basins.

For a lake or reservoir station, capacity tables giving the contents for any stage are prepared from stage-area relation curves defined by surveys. The application of the stage to the capacity table gives the contents, from which the daily, monthly, or yearly change in contents is computed.

If the stage-capacity curve is subject to changes because of deposition of sediment in the reservoir, periodic resurveys of the reservoir are necessary to define new stage-capacity curves. During the period between reservoir surveys the computed contents may be increasingly in error due to the gradual accumulation of sediment.

For some gaging stations there are periods when no gage-height record is obtained or the recorded gage height is so faulty that it cannot be used to compute daily discharge EXPLANATION OF DATA 5 or contefnts. This happens when the recorder stops or otherwise fails to operate pr<§perly, intakes are plugged, the float is frozen in the well, or for various other reasons. For such periods the daily discharges are estimated on the basis of recorded range in stage, adjoining good record, discharge measurements, weather records, and comparison with other station records from the same or nearby basins. Likewise daily contents may be estimated on the basis of operator's log, adjoining good record, inflow-outflow studies, and other information.

The data in this report generally comprise a description of the station and tabula­ tions of daily and monthly figures. For gaging stations on streams or canals a table showing the daily discharge and monthly and yearly discharge is given, gor gaging stations on lakes and reservoirs a monthly summary table of stage and contents or a table showing the daily contents is given. Tables of daily mean gage heights are included for some streamflow stations and for some reservoir stations. Records are published for the water year, which begins on October 1 and ends on September 30.

The description of the gaging stations gives the location, drainage area, period of record, type and history of gages, average discharge, extremes of discharge or contents, general remarks, and notations of revisions of previously published records. The location of the gaging station and the drainage area are obtained from the most accurate maps available. River mileage, given under "LOCATION" for some stations, is that determined and used by the Corps of Engineers or other agencies. Periods for which there are published records for the present station or for stations generally equivalent to the present one are given under "PERIOD OF RECORD." The type of gage currently in use, the datum of the present gage above mean sea level, and a condensed history of the types, locations, and datums of previous gages used during the period of record are given under "GAGE." In references to datum of gage, the phrase "mean sea level" denotes "Sea Level Datum of 1929" as used by the Topographic Division of the Geological-Survey unless otherwise qualified. The average discharge for the number of years indicated is given, under "AVERAGE DISCHARGE"; it is not given for stations having fewer than 5 complete years of record or for stations where changes in water development during the period of record cause the figure to have little significance. In addition, the median of yearly mean discharges is given for stream-gaging stations having 10 or more complete years of record if the median differs from the average by more than 10 percent. Under "EXTREMES" are given, usually in tabular form, the maximum instantaneous discharge (or contents) and gage height for the current water years (1966-70); the minimum instantaneous discharge if there is little or no regulation (or minimum contents); the minimum daily discharge if there is, extensive regulation (also the minimum instantaneous discharge if it is abnormally low); and the minimum gage height if it is also abnormally low. For stations for which peak discharges are published, all independent peaks above the selected base and the time of occurrence and corresponding gage heights are published in the first table under "EXTREMES." The base discharge, which is given in parentheses in the table heading, is selected so that an average of about three peaks a year will be presented. Peak discharges are not published for any canals, ditches, drains, or for any stream for which the peaks are subject to substantial control by man. Time of day is expressed in 24-hour local standard time; for example, 12:30 a.m. is 0030, 1:30 p.m. is 1330. The minimums for these stations are published in a separate table following the table of peaks. In the paragraph following the current data, the data given are for the periods listed in the "PERIOD OF RECORD" paragraph. Reliable information concerning major floods that have occurred outside the period of record is given in the last paragraph under "EXTREMES." Unless otherwise qualified, the maximum discharge (or contents) corresponds to the crest stage obtained by use of a water-stage recorder (graphic or digital), a crest-stage gage, or a non- recording gage read at the time of the crest. If the maximum gage height did not occur at the same time as the maximum discharge (or contents), it is given separately. Information pertaining to the accuracy of the discharge records, to conditions which affect the natural flow at the gaging station, and to availability of Water-Quality records, is given under "REMARKS." For reservoir stations information on the dam forming the reservoir, the capacity, outlet works and spillway, and purpose and use of the reservoir is given under "REMARKS." 6 SURFACE WATER SUPPLY, 1966-70, PART 11, VOLUME 1

Previously published records of some stations have been found to be in error on the basis of data or information later obtained. Revisions of such records are usually published along with the current records in one of the annual or compilation reports. In order to make it easier to find such revised records, a paragraph headed "REVISIONS (WATER YEARS)" has been added to the description of all stations for which revised records have been published. Listed therein are all the reports in which revisions have been published, each followed by the water years for which figures are revised in that report. In listing the water years only one number is given; for instance, 1965 stands for the water year October 1, 1964, to September 30, 1965. If no daily, monthly, or annual figures of discharge are affected by the revision, the fact is brought out by notations after the year dates as follows: "(M)" means that only the instantaneous maxi­ mum discharge was revised; "(m)" that only the instantaneous minimum was revised; and "(P)" that only peak discharges were revised. If the drainage area has been revised, the report in which the revised figure was first published is given. It should be noted that for all stations for which cubic feet per second per square mile and runoff in inches are published, a revision of the drainage area necessitates corresponding revision of all figures based on the drainage area. Revised figures of cubic feet per second per square mile and runoff in inches resulting from a revision of the drainage area only are usually not published in the annual series of reports.

The daily table for stream-gaging stations gives the mean discharge for each day and is followed by monthly and yearly summaries. In the monthly summary below the daily table, the line headed "TOTAL" gives the sum of the daily figures. The line headed "MEAN" gives the average flow in cubic feet per second during the month. The lines headed "MAX" and "MIN" give the maximum and minimum daily discharges, respectively, for the month. Discharge for the mo'nth also may be expressed in cubic feet per second per square mile (line headed "CFSM"), or in inches (line headed "IN"), or in acre-feet (line headed "AC-FT"). Figures for cubic feet per second per square mile and runoff in inches are omitted if there is extensive regulation or diversion, if the drainage area includes large noncontributing areas, or if the average annual rainfall over the drainage basin is usually less than 20 inches.

In the yearly summary below the monthly summary, the figures following "MAX" are the maximum daily discharges for the calendar and water years; likewise, those following "MIN" are the minimum daily discharges. Footnotes to the table of daily discharge are introduced by the word "NOTE." Foot­ notes are used to indicate periods for which the discharge is computed or estimated by special methods because of no gage-height record, backwater from various sources, or other unusual conditions. Periods of no gage-height record are indicated if the period is continuous for a month or more or includes the maximum discharge for the year. Periods of backwater from an unusual source, of indefinite stage-discharge relation, or of any other unusual condition at the gage site are indicated only if they are a month or more in length and the accuracy of the records is affected. Days on which the stage- discharge relation is affected by ice are not indicated. The methods used in computing discharge for various unusual conditions have been explained in preceding paragraphs.

For most gaging stations on lakes and reservoirs the data presented comprise a description of the station and a monthly summary table of stage and contents. For some reservoirs a table showing daily contents or stage is given. A skeleton table of capacity at given stages is published for all reservoirs for which records are published on a daily basis, but is not published for reservoirs for which only monthly data are given.

Data collected at partial-record stations are given at the end of this report. Data for partial-record stations are presented in two tables. Thefirst is a table of discharge measurements at low-flow partial-record stations, and the second is a table of annual maximum stage and discharge at crest-stage stations. Occasionally, a series of discharge measurements are made within a short time period to investigate the seepage gains or losses along a reach of a stream or to determine the low-flow characteristics of an area. Such measurements are given in special tables following the tables of partial- record stations. PUBLICATIONS 7

ACCURACY OF FIELD DATA AND COMPUTED RESULTS

The accuracy of streamflow data depends primarily on (1) the stability of the stage- discharge relation or, if the control is unstable, the frequency of discharge measure­ ments, and (2) the accuracy of observations of stage, measurements of discharge, and interpretations of records.

The station description under "REMARKS" states the degree of accuracy of the records. "Excellent'1 means that about 95 percent of the daily discharges are within 5 percent; "good", within 10 percent; and "fair" within 15 percent. "Poor" means that daily discharges have less than "fair" accuracy.

Figures of daily mean discharge in this report are shown to the nearest hundredth of a cubic foot per second for discharges of less than 1 cfs; to tenths between 1.0 and 10 cfs; to whole numbers between 10 and 1,000 cfs; and to 3 significant figures above 1,000 cfs. The number of significant figures used is based solely on the magnitude of the figure. The same rounding rules apply to discharge figures listed for partial- record stations.

Discharge at many stations, as indicated by the monthly mean, may not reflect natural runoff due to the effects of diversion, consumption, regulation by storage, increase or decrease in evaporation due to artificial causes, or to other factors. For such stations, figures of cubic feet per second per square mile and of runoff in inches are not published unless satisfactory adjustments can be made for diversions, for changes in contents of reservoirs, or for other changes incident to use and control. Evaporation from a reservoir is not included in the adjustments for changes in reser­ voir contents, unless it is so stated. Even at those stations where adjustments are made, large errors in computed runoff may occur if adjustments or losses are large in comparison with the observed discharge.

PUBLICATIONS

Through September 30, 1960, the records of discharge and stage of streams and contents and stage of lakes and reservoirs were published in an annual series of U.S. Geological Survey water-supply papers entitled "Surface Water Supply of the United States." Prior to 1951, there were 14 volumes in the series; one for each of the 14 parts whose boundaries coincided with certain natural drainage lines within the con­ terminous United States. From 1951 to 1960, there were 20 volumes in the series, including one each for the States of Alaska (Part 15) and Hawaii (Part 16).

This report is one of the second series of water-supply papers to be published on a 5-year basis. The first series covered the 5-year period October 1, 1960, to September 30, 1965. This series covers the period October 1, 1965, to September 30, 1970. To meet interim requirements, streamflow and related data have been released by the Geological Survey in annual reports, beginning with the 1961 water year, by State. These reports are entitled, "Water Resources Data for (state), Part 1. Surface Water Records." Distribution of these reports is limited and primarily for local needs. Any revision or corrections found necessary to the records published in these annual State reports have been made and published herein without reference.

These two series of 5-year water supply papers consist of 37 volumes each. The boundaries of the various parts and volumes within the parts are indicated in the fol­ lowing list and on the map in Figure 1.

Part 1. North Atlantic slope basins, in three volumes: Vol. 1: Basins from Maine to Connecticut Vol. 2: Basins from New York to Delaware Vol. 3: Basins from Maryland to York River Figure 1. Map of the United States showing area covered by the volumes in the series on surface-water supply. The area covered by this report is shaded. PUBLICATIONS 9

Part 2. South Atlantic slope and eastern Gulf of basins, in three volumes: Vol. 1: Basins from James River to Savannah River Vol. 2: Basins from Ogeechee River to Carrabelle River Vol. 3: Basins from Apalachicola River to Pearl River Part 3. Ohio River basin, in four volumes: Vol. 1: Ohio River basin above Kanawha River Vol. 2: Ohio River basin from Kanawha River to Louisville, Kentucky Vol. 3: Ohio River basin from Louisville, Kentucky, to Wabash River Vol. 4: Ohio River basin below Wabash River Part 4. St. Lawrence River basin, in two volumes: Vol. 1: Basins of streams tributary to Lakes Superior, Michigan, and Huron Vol. 2: St. Lawrence River basin below Lake Huron Part 5. Hudson Bay and Upper Mississippi River basins, in three volumes: Vol. 1: Hudson Bay basin Vol. 2: Upper Mississippi River basin above Keokuk, Iowa Vol. 3: Upper Mississippi River basin below Keokuk, Iowa Part 6. Missouri River basin, in four volumes: Vol. 1: Missouri River basin above Williston, North Dakota Vol. 2: Missouri River basin from Williston, North Dakota, to Sioux City, Iowa Vol. 3: Missouri River basin from Sioux City, Iowa, to Nebraska City, Nebraska Vol. 4: Missouri River basin below Nebraska City, Nebraska Part 7. Lower Mississippi River basin, in two volumes: . Vol. 1: Lower Mississippi River basin except Arkansas River basin Vol. 2: Arkansas River basin Part 8. Western Gulf of Mexico basins, in two volumes: Vol. 1: Basins from Mermentau River to Colorado River Vol. 2: Basins from Lavaca River to Rio Grande Part 9. Colorado River basin in three volumes: Vol. 1: Colorado River basin above Green River Vol. 2: Colorado River basin from Green River to Compact Point Vol. 3: Lower Colorado River basin Part 10. The Great Basin Part 11. Pacific slope basins in California, in four volumes: Vol. 1: Basins from Tijuana River to Santa Maria River Vol. 2: Basins from Arroyo Grande to Oregon State line except Central Valley Vol. 3: Southern Central Valley basins Vol. 4: Northern Central Valley basins Part 12. Pacific slope basins in Washington, in two volumes: Vol. 1: Pacific slope basins in Washington except Columbia River basin Vol. 2: Upper Columbia River basin Part 13. Snake River basin Part 14. Pacific slope basins in Oregon and Lower Columbia River basin Part 15. Alaska Part 16. Hawaii and other Pacific areas Water-supply papers and other publications of the Geological Survey containing data on the water resources of the United States may be purchased or consulted as follows:

1. Copies may be purchased from the Superintendent of Documents, Government Printing Office, Washington, D. C. 20402, who will, on application, furnish lists giving prices. A list of Geological Survey publications may also be obtained by applying to the Director, Geological Survey, National Center, Reston, Va. 22092.

2. Sets of the reports may be consulted in the libraries of the principal cities in the United States.

3. Sets are available for consultation in the offices of the Water Resources Division of the Geological Survey. Addresses of the offices in the area covered by this report are given on page 2.

Early records of the flow of streams in the United States are published in the reports that follow. In many of these reports records for years earlier than those indicated 10 SURFACE WATER SUPPLY, 1966-70, PART 11, VOLUME 1

have been included for some streams. Most of these reports are out of print, but may be available for consultation in the district offices and in public libraries.

Streamflow data for the years 1884-1901, in reports of the Geological Survey (A - Annual Report; B - Bulletin)

Report Character of data Year

10th A, pt. 2 Descriptive information only llth A, pt. 2 .Monthly discharge and descriptive information ...... 1884-90. 12th A, pt. 2 .... do ...... 1884-91. 13th A, pt. 3 .... do ...... 1884-92. 14th A, pt. 2 Monthly discharge...... 1888-93. B 131 . . . Descriptions, measurements, gage heights, and ratings .... 1893-94. 16th A. pt. 2 Descriptive information only. B 140 . . . Descriptions, measurements, gage heights, ratings and 1895. monthly discharge. WSP 11..' Gage heights...... 1896. 18th A. pt. 4 Descriptions, measurements, ratings, and monthly discharge 1895-96. WSP 15 . . Descriptions, measurements, and gage heights of streams 1897. east of the Mississippi River, and Missouri River and tributaries above Kansas River. WSP 16 . . Descriptions, measurements, and gage heights of streams 1897. west of the Mississippi River, except Missouri River and tributaries above Kansas River. 19th A, pt. 4 Descriptions, measurements, ratings and monthly discharge 1897. WSP 27 . . Measurements, ratings, and gage heights of streams east of 1898. the Mississippi River, and Missouri River and tributaries. WSP 28 . . Measurements, ratings, and gage heights of streams west of 1898. the Mississippi River, except Missouri River and tribu­ taries. 20th A. pt. 4 Monthly discharge...... 1898. WSP 35 to 39 Descriptions, measurements, gage heights, and ratings .... 1899. 21st A, pt. 4 Monthly discharge...... 1899. WSP 47 to 52 Descriptions, measurements, gage heights, and ratings .... 1900. 22nd A, pt. 4 Monthly discharge...... 1900. WSP 65, 66. Descriptions, measurements, gage heights, and ratings . . . . 1901. WSP 75. .. Monthly discharge...... 1901.

Reports on surface water supply containing records from 1878 to date for drainage basins in this report are listed below. The data for any particular gaging station will, in general, be found in the reports covering the years during which the station was maintained.

Number of water-supply papers containing results of stream measurements in Pacific slope basins in California, Tijuana River to Santa Maria River, 1878-1965

Year WSP Year WSP Year WSP Year WSP Year WSP

1878-1911. .300 1922. . 551 1932. . 736 1942. . 961 1952. . 1245 1912. . . . .331 1923. . 571 1933. . 751 1943. . 981 1953. . 1285 1913. . . . .361 1924. . 591 1934. . 766 1944. .1011 1954. . 1345 1914. . . . .391 1925. . 611 1935. . 791 1945. .1041 1955. . 1395 1915. . . . .411 1926. . 631 1936. . 811 1946. .1061 1956. . 1445 1916. . . . .441 1927. . 651 1937. . 831 1947. .1091 1957. . 1515 1917. . . . .461 1928. . 671 1938. . 861 1948. .1121 1958. . 1565 1918. . . . .481 1929. . 691 1939. . 881 1949. .1151 1959. . 1635 1919-20. . .511 1930. . 706 1940. . 901 1950. .1181 1960. . 1715 1921. . . . .531 1931. . 721 1941. . 931 1951. .1215 1961-65. 1928 OTHER DATA AVAILABLE . 11

Records for the area covered by this report have been compiled through September 1950 and for the period October 1950 to September 1960 and published in Water-Supply Papers 1315-B and 1735. respectively. These reports contain a summary of monthly and annual discharges for all previously published records as well as some records not contained in the annual series of water-supply papers. All records were reexamined and revised where warranted. Estimates of discharge were made to fill short gaps when­ ever practical.

The reports listed in the foregoing tables contain the customary records of discharge collected during the systematic operation of gaging stations. Detailed information on the stage and discharge of many streams during major floods has been included in special reports OB these floods published by the Geological Survey. The more recent of these special reports also contain other pertinent hydrologic information and analyses and compilations of data relating to earlier notable floods. The following list gives the numbers and titles of these reports:

WSP Title

426...... Southern California floods of January 1916. 771...... Floods in the United States, magnitude and frequency. 796-C .... Flood in La Canada Valley, Calif., January 1, 1934. 847...... Maximum discharges at stream-measurement stations through September 1938. 1530 ..... Summary of floods in the United States during 1956. 1650 ..... Floods of December 1955-January 1956 in the far Western States. 1660-B. . . . Summary of floods in the United States during 1958. 1685 ..... Magnitude and frequency of floods in the United States. 1850-E. . . . Summary of floods in the United States during 1965. 1866-B. . . . Floods of December 1964 and January 1965 in the far Western States. 1870-D. . . . Summary of floods in the United States during 1966. 2030 ..... Summary of floods in the United States during 1969.

Reports giving records of chemical quality and temperature of surface water and suspended-sediment loads of streams, in the area covered by this volume for the water years 1941-70 are listed below:

Numbers of water-supply papers containing water-quality records in the Pacific slope basins in California from Tijuana River to Santa Maria River, 1941-70 Year WSP Year WSP Year WSP Year WSP Year WSP

1941. ... 942 1947. . . 1102 1953. . . 1293 1959. , . 1645 1965. . . .1965 1942. ... 950 1948. . . 1133 1954. . . 1353 1960. , . 1745 1966. . . .1995 1943. ... 970 1949. . . 1163 1955. . . 1403 1961. . . 1885 1967. . . .2015 1944. . . 1022 1950. . . 1189 1956. . . 1453 1962. . . 1945 1968. . . .2099 1945. . . 1030 1951. . . 1200 1957. . . 1523 1963. . . 1951 1969. . . . 2149 1946. . . 1050 1952. . , 1253 1958. . . 1574 1964. . . 1958 1970. . . . 2159

OTHER DATA AVAILABLE

Information of a more detailed nature than that published for most of the gaging stations such as discharge measurements, gage-height records, and rating tables is on file in the district offices. Also most gaging-station records are available in computer-usable form and many statistical analyses have been made.

Water-quality records also are collected at or near some gaging stations. Data are obtained on the chemical quality of the stream water, on water temperature, and on 12 SURFACE WATER SUPPLY, 1966-70, PART 11, VOLUME 1 sediment. Under "Remarks" of the station description, reference is made to water* quality records collected on a regular basis for the station. Results of the data collected are published in annual water-supply papers entitled "Quality of Surface Waters of the United States" and in annual reports issued by States beginning with 1964 water year; the state reports are entitled, "Water Resources Data for (state), Part 2. Water Quality Records."

Information on the availability of unpublished data, statistical analyses, or quality of water records, may be obtained from the district offices listed on page 2.

RECORDS OF DISCHARGE COLLECTED BY AGENCIES OTHER THAN THE GEOLOGICAL SURVEY

Records of. discharge not published by the Geological Survey were collected at many additional sites by many other Federal, State, County, City, and local agencies, and by private organizations. A listing of stream-gaging stations and the agencies operat­ ing them are contained in a publication by the California Department of Water Resources, Bulletin 157, Index of Stream-Gaging Stations in and Adjacent to California, 1970, and in publications by the Office of Water Data Coordination, Water Resources Division, U.S. Geological Survey, National Center, Reston, Virginia22092. Information on records available on specific sites can be obtained upon request. GAGING-STATION RECORDS

TIJUANA RIVER BASIN

11010000 COTTONWOOD CREEK AT , CALIF. LOCATION.--Lat 32°41'01", long 116°32'45", in NEH sec. 23, T.17 S. , R.4 E. , San Diego County, on Morena Dam outlet tower. DRAINAGE AREA.--114 sq mi. PERIOD OF RECORD. --January 1916, October 1936 to September 1968 (discontinued). GAGE.--Nonrecording gage. Datum of gage is 2,882.4 ft above level. AVERAGE DISCHARGE. --32 years (1936-68), 9.71 cfs (7,030 acre-ft per year); median of yearly mean discharges, 2.1 cfs (1,500 acre-ft per year). REMARKS. --Records of discharge represent all water reaching Morena Reservoir, including precipitation voir surface. Discharge computed on basis of records of storastorage, release (draft), spill, leakage, and evapo­ ration. Evaporation from reservoir surface computed on basis of evaporation from Colorado land pan using a coefficient of 1.00 excepting the period January 1962 to June 1963, when the mass-transfer method was used. Prior to October 1963 a coefficient of 0.80 was used. Area and capacity tables for reservoir are based on a survey made in 1948. Dam completed and storage began in 1910. Capacity of reservoir at permanent spillway level (gage height, 157.00 ft), 50,210 acre-ft. Dead storage, 654 acre-ft below outlet No. 3 at gage height 70.5 ft. No regulation or diversion above reservoir. Water is released down Cottonwood Creek to Barrett

COOPERATION.--Records computed in cooperation with city of San Diego. REVISIONS (WATER YEARS).--WSP 1091: 1946. WSP 1285: 1948. WSP 1928: Drainage area. MONTHLY DISCHARGE, MATER YEARS OCTOBER 1965 TO SEPTEMBER 1968 MONTH IN RATION PLUS CONTENTS (ACRE- LEAKAGE (ACRE- (ACRE- MORENA RESERVOIR FEET) FEET) FEET) OCTOBER 1965. 62.3 203 -19 +171 +102 CAL YR 1965.

JANUARY 1966. 69.3 572 +96 FEBRUARY..... 70.8 676 +104 MARCH...... 71.6 734 +58 APRIL...... 71.4 719 -15 MAY...... 71.0 690 -29 JUNE...... 70.4 647 -43 JULY...... 69.7 599 AUGUST...... 546 SEPTEMBER.... 507 WTR YR 1966.

OCTOBER.. 67.8 476 NOVEMBER. 67.8 476 DECEMBER. 78.6 1.362 CAL YR 1966.

JANUARY 1967.. ,415 FEBRUARY...... ,426 MARCH...... ,447 APRIL...... ,534 MAY...... ,512 JUNE...... ,447 JULY...... ,394 AUGUST...... ,341 SEPTEMBER..... ,300 WTR YR 1967.

OCTOBER.. ,249 NOVEMBER. ,269 DECEMBER. ,341 CAL YR 1967. JANUARY 1968.. ,352 FEBRUARY...... ,373 MARCH...... ,383 APRIL...... ,373 -10 MAY...... ,321 -52 JUNE...... ,259 -62 JULY...... ,200 -59 AUGUST...... ,142 -58 SEPTEMBER..... ,076 -66 WTR YR 1968. -224 513 25 314 t GAGE HEIGHT AT 0800 HOURS ON LAST DAY OF MONTH. NOTE. FOR MONTHS WHEN INFLOW TO THE RESERVOIR WAS SMALL AND OTHER QUANTITIES WERE LARGE. DISCORDANT FIGURES OF DISCHARGE MAY APPEAR. THIS ARISES PRIMARILY FROM THE DIFFICULTY OF COMPUTING DISCHARGE AS THE RESIDUAL OF SEVERAL LARGER QUANTITIES, WHICH ARE NOT SUSCEPTIBLE TO MEASUREMENT WITH A PRECISION NECESSARY TO PRODUCE A FINAL ANSWER WITHIN DESIRABLE LIMITS OF ACCURACY. TIJUANA RIVER BASIN

11010900 WILSON CREEK TRIBUTARY NEAR DULZURA, CALIF. LOCATION. --Lat 32°43'22", long 116°42 ' 06" , in NEfcSEWJWi sec. 5, T.17 S., R.3 E., San Diego County, on n on Japatul Lyons Valley Road, 6.6 miles northeast of Dulzura. DRAINAGE AREA. --0. 61 sq mi. , ,. v. imn PERIOD OF RECORD. --Annual maximums, water years 1962-67. October 1967 to September 1970. GAGE. --Water-stage recorder and culvert control. Altitude of gage is 2,200 ft (from topographic map). EXTREMES. --Maximums and minimums (discharge in cubic feet per second, gage height in teet) tor tne wate 1966-70 are contained in the following table: Minimum Wtr yr Date Discharge G.H. Date Discharge 1966 Nov. 22 1965 62 10.63 - 1966 98 12.22 - 1968 Dec. 19 1967 4.5 7.73 Mo st of time 1969 Feb. 25 1969 49 10.17 do. 1970 Mar. 5 1970 .80 7.28 do. urn discha rge, 98 cfs D ec. 6, 1966 (ga 8ofheight, 12. 22 ft, fro« « crest-st age gage) , from rating cu rve extended above 1.6 cfs of basis of computation flow throu gh culvert at gage h eights 8.0 10.67, and 12. 22 ft; no flow for all or most of e ach year. REMARKS. --Records poor. No re gulation or diversion district offic e. DISCHARGE, IN CUBIC FEET PER SECOND , WATER YEARS OCTOBER 1967 TO SEPTEMBER 1970 DEC. 19, 1967... 1.3 JAN. 28, 1969... .15 FEB. 24, 1969... 3 .2 MAR. 10, 1969... .29 29...... 10 25...... 14 11...... 22 JAN. 14, 1968... .02 FEB. 6...... 84 26. .02 7...... 23 27. 8...... 01 28. 19. HI R. 1...... ; 20...... 45 21...... 09 . 3 ...... 29 4. .: 4 27...... 1.0 23...... 1.1 5. 9 MAR. 5, CFS-DAYS MAXIMUM MINIMUM MEAN RUNOFF IN MONTH ACRE-FEET DECEMBER 1967...... 1 40 .3 0 .045 2.8 40 .3 0 .004 2.8 .... 0 92 1 0 .55 34 68 73 .6 0 .22 13 33 1 33 1 .15 .15 0 .005 .3 .15 .15 0 .0004 .3

NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE.

11011000 COTTONWOOD CREEK AT BARRETT DAM, NEAR DULZURA, CALIF. LOCATION.--Lat 32°40'46", long 116°40'11", in SEfcNWkNWfc sec.22, T.17 S., R.3 E. , San Diego County, on Barrett

RIOD OF RECORD.--January 1906 to December 1915, October 1945 to September 1966 (discontinued"). Published Sep- from Cottonwood Creek basin below Morena Dam (drainage area, 130 sq mi). different datum (prior to completion of dam). REMARKS.--Records of inflow represent all water reaching Barrett Reservoir, including precipi storage, release (draft), spill, leakage, and evaporation. Evaporation from reservoir surface computed on basis of evaporation from Colorado land pan using a coefficient of 0.76. Prior to October 1964, a coefficient of 0.80 was used except for the period.January 1962 to June 1963 when the mass-transfer method was used. Area-capacity tables for reservoir are based on a resurvey made in 1948, 1951, and 1955. Barrett Dam was com- 168.88 ft), 44,760 acre-ft. Dead storage, 719 acre-ft below lowest outlet at gage height 58.88 ft, included in these records. Flow partly regulated by Morena-.Reservoir (see station 11010000). Water drawn from Barrett COOPERATION.--Records computed in cooperation with city of San Diego. REVISIONS (WATER YEARS).--WSP 1395: 1949-54. WSP 1928: Drainage area. MONTHLY INFLOW, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

MONTH INFLOW HEIGHT (ACRE- IN (ACRE- RATION PLUS (ACRE- (FEET) * FEET) (ACRE- FEET) (ACRE- BARRE rr RESERVOIR FEET) FEET) 1,335 -32 0 31 0 -1 75 2,094 IT 59 0 11 0 770 2,477 +383 0 7 5 390

+1,434 0 290 5 1,724

2,986 + 509 0 14 524 3,832 +846 0 19 866 4,274 +442 0 40 482 4,351 +77 0 63 140 3,711 . -640 545 68 1,460 -2,251 2,450 58 257 841 660 37 0 78 816 0 34 0 9 SEPTEMBER...... 798 -18 0 25 0 7

WTR YR 1966. -569 3,655 407 2.2- 3,495

t GAGE HEIGHT AT 0800 HOURS ON LAST DAY OF MONTH. NOTE. FOR MONTHS WHEN INFLOW TO THE RESERVOIR WAS SMALL AND OTHER QUANTITIES WERE LARGE, DISCORDANT FIGURES OF INFLOW MAY APPEAR. THIS ARISES PRIMARILY FROM THE DIFFICULTY OF COMPUTING INFLOW AS THE RESIDUAL OF SEVERAL LARGER QUANTITIES, WHICH ARE NOT SUSCEPTIBLE TO MEASUREMENT WITH A PRECISION NECESSARY TO PRODUCE A FINAL ANSWER WITHIN DESIRABLE LIMITS OF ACCURACY. TIJUANA RIVER BASIN

11011900 POTRERO CREEK TRIBUTARY NEAR BARRETT JUNCTION, CALIF. LOCATION.--Lat 32°36'04", long 116°41'04", in SWjNE^SWs sec.16, T.18 S., R.3 E., San Diego County, State Highway 94, 1.4 miles southeast of Barrett Junction. DRAINAGE AREA.--0.78 sq mi. PERIOD OF RECORD.--Annual axiraum water years 1962-66. February 1966 to September 1969. Annual maximum water year 1970. GAGE.--Crest-stage gage. Altitude of gage is 1,220 ft (fr topographic map). Dec. 12, 1961, to Feb. 17, 1966, crest-stage gage and Feb. 18, 1966, to Sept. 30, 1969, ter-stage recorder, at present site and datum. EXTREMES. --Haxiraums and minimums (discharge in cubic feet per second, gage height in feet) for the water years 1966-70 are contained in the following table: Minimum daily Wtr yr Date charge G.H. Date Discharge 1966 Nov. 294 15.25 Entire period 1967 122 13.42 Most of year 1968 104 13.16 do. 1969 7.0 10.82 do. 1970 Mar. 1970 2.3 10.43 do. Per rd: Maximum discharge, 294 cfs Nov. 22, 1965 (gage height, 15.25 ft), from rating curve xtended above 0.2* cfs- on basis of- culvert computation' of- peak fl- flow for most of time in each yea REMARKS.--Records poor. No regulation or diversion above station.

DISCHARGE! IN CUBIC FEET PER SECOND, FEBRUARY 1966 TO SEPTEMBER 1969

.0 MAR. 8, 1968. FEB. 25, 1969. .90 MAR. 5, 1969. JAN. 14, 1969... .80 26...... 60 .20 25...... 2.8 .50 .20 26...... 1.2 .20 APR. 11, 1967... .0 27...... 60 MAR. 1...... 10 NOV. 26...... 20 28...... 30 2...... DEC. 19...... 2.1 29...... 20 3...... FEB. 13, 1968... .10 30...... 10 4......

MONTH CFS-DAYS MAXIMUM RUNOFF IN ACRE-FEET NOVEMBER 1966...... 2.0 2.0 4.0 DECEMBER...... 23.1 16 CAL YR 1966......

APRIL 1967...... 1.0 1.0 WTR YR 1967...... 26.1 16

NOVEMBER 1967...... 20 .20 .007 DECEMBER...... 2.1 2.1 .068 CAL YR 1967...... 3.30 2.1 .009

FEBRUARY 1968...... 10 .10 MARCH...... 8.3 8.3 WTR YR 1968...... 10.70 8.3 CAL YR 1968...... 8.4 8.3

JANUARY 1969...... 5.28 2.8 .27 FEBRUARY...... 2.40 .90 .086 MARCH...... 2.50 .'30 .081 HTR YR 1969...... 10.18 2.8 .028

NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. TIJUANA RIVER BASIN

11012000 COTTONWOOD CREEK ABOVE TECATE CREEK, NEAR DULZURA, CALIF. LOCATION.--Lat 32°34'30", long 116°45'11", in NWWsSWJs sec.26, T.18 S., R.2 E. , San Diego County, on right bank 0.8 mile upstream from confluence with Tecate Creek and 5.1 miles south of Dulzura. DRAINAGE AREA.--310 sq mi. PERIOD OF RECORD.--October 1936 to September 1970. GAGE.--Water-stage recorder. Datum of gage 569.40 ft mean sea level (levels by International Boundary and Water Commission). AVERAGE DISCHARGE.--34 years, 6.77 cfs (4,900 acre-ft per year); edian of yearly mean discharges, 1.0 cfs (720 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in c 1966-70 are contained in the following table: Minimum Wtr yr G.H. Date Dischargi 1966 1965 3.90 Long periods I 1967 1966 832 5.66 do. 1 1968 1968 117 3.10 do. 1 1969 791 5.58 do. 1 1970 18 2.13 "do. 1 Period of record: Maximum discharge, 4,340 cfs Feb. 7, 1937 (gage height, 9.65 ft), from rating curve extended above 1,500 cfs; no flow for part of each year. REMARKS.--Records good. Flow regulated by Morena Reservoir (capacity, 50,210 acre-ft) and Barrett Reservoir (capacity, 44,760 acre-ft). Water released from Barrett Reservoir through Dulzura conduit is diverted to Lower Otay Reservoir. REVISIONS (WATER YEARS).--WSP 1245: 1937-38. WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY 1 a 2.8 .6 .90 .70 .10 2 3 .1 .60 1.2 .10 3 0 .1 0 .80 .10 4 G .4 . 0 .50 .10 5 0 .7 0 .50 .10 6 0 .2 0 .50 0 7 0 .7 . .40 0 8 0 .3 .30 0 9 0 .0 .30 0 10 0 .9 .30 0 11 0 .6 . .30 0 12 0 .5 . .30 0 13 a .3 .30 0 It a .3 .30 0 15 0 .3 . .30 0 16 0 1 .2 .20 0 17 0 1 .1 .20 0 18 0 1 .1 . .20 0 19 0 .0 .10 0 20 0 .2 .10 0 21 0 1.2 .90 .10 0 22 3.1 .90 .70 .10 0 23 127 .80 .60 .10 0 24 28 .70 .70 .10 0 25 23 .60 .70 .20 0 26 16 .50 .90 .20 0 27 10 .70 .80 .20 0 28 6.4 .50 .60 .20 0 29 4.7 .40 .20 0 30 3.5 1 1.4 .10 0 31 3 1.6 .10 TOTAL 0 221.7 155.2 60.90 30.80 9.40 .50 0 0 0 0 MEAN 0 7.39 9.01 1.96 1.10 .30 .017 0000 MAX 0 127 16 7.6 2.5 1.2 .10 0 0 0 0 NIN 0 0 1.1 .40 .40 .10 00000 AC-FT 0 440 308 121 61 19 1.0 0 0 0 0 CAL YR 1965 TOTAL 448. BO MEAN 1.23 NAX 127 MIN 0 AC-FT 890 TIJUANA RIVER BASIN

11012000 COTTONWOOD CREEK ABOVE TECATE CREEK, NEAR DULZURA, CALIF.--CONTINUED DISCHARGE. IN CUBIC FEET PER SECOND. WATER VEAR OCTOBER 1966 TO SEPTEMBER 1967 OCT NOV DEC JAN FEB MAR APR' MAY JUN JUL AUG 1 0 .50 2.0 .10 .60 .30 2 0 .50 1.7 .10 .50 .20 3 0 .40 1.5 .10 .30 .20 4 0 .40 1.3 .40 .30 .20 5 39 .40 1.2 .40 .30 .20 6 238 .40 .90 .30 .20 .20 7 259 .30 .80 .20 .20 .10 8 42 .30 .60 .20 .20 .10 9 23 .30 .60 .20 .20 .10 1C IS .30 .60 .20 . .20 .10 11 10 .30 .50 .30 3.0 .10 12 7.0 .30 .40 .30 3.5 .10 13 S.4 .30 .40 .40 1.0 () 14 4.2 .30 .40 2.0 .50 15 3.4 .30 .40 .80 .30

16 2. .30 .30 .40 .20 17 2. .30 .30 .30 .20 IB 1. .20 .20 .30 .20 19 1. .20 .20 .30 .80 20 1. .30 .20 .20 .80 21 1.2 .30 .20 .20 .60 22 1.0 1.2 .20 .20 1.7 23 .90 11 .20 .20 1.1 24 .80 3.4 .20 .20 1.0 25 .70 7.1 .20 .20 .90 26 .70 4.9 .20 .20 .60 27 .60 3.7 .20 .20 .50 28 .SO 3.2 .20 .20 .50 29 .50 2.5 _»__ .40 .50 30 .BO 2.3 _. .30 .50 . 31 . 50 2.2 .30 _____ TOTAL 0 0 663.70 48.40 16.10 10.10 21.40 L.90 MEAN 0 0 21.4 1.56 .58 .33 .71 061 MAX 0 0 259 11 2.0 2.0 3.5 .30 HIM 000 .20 .20 .10 .20 0 AC-FT 0 0 1.320 96 32 20 42 3.8

HTR YR 1967 TOTAL 761.60 MEAN 2.09 MAX 259 MIN 0 AC-FT 1.510

DISCHARGE. IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1967 TO SEPTEMBER 196B NOV DEC JAN FEB MAR APR MAY JUN JUL

7 0 .40 .10 .10 .10 8 0 .30 .10 16 .10 9 0 .30 .10 8.3 0 10 0 .30 .20 2.8 0 11 0 .30 .20 1.7 0 12 0 .30 .20 1.1 0 13 0 .20 .60 .80 0 14 0 .20 .70 .80 0 15 0 .20 .20 .70 0 16 .10 .20 .20 .60 0 17 .60 .20 .20 .60 .10 18 8.6 .10 .20 .70 .20 19 44 .10 .20 1.2 .10 20 18 .10 .20 .50 .10 21 10 .10 .20 .30 .10 22 6.4 .10 .20 .30 .10 23 4.7 .10 .20 .20 0 24 3.9 .10 .10 .20 0 25 3.2 .10 .10 .20 0 26 .6 2.7 .10 .10 .20 0 27 .30 2.3 .20 .10 .20 0 28 2.2 .30 .20 .10 0 29 2.0 .20 .10 .10 0 30 1.7 .20 -»_#__ .10 0 31 1.6 .20 -_____ .10 _____ TOTAL 0 1.90 112.00 10.60 5.40 38.20 4.70 MEAN 0 .063 3.61 .34 .19 1.23 .16 MAX 0 1.6 44 1.5 .70 16 2.0 MIN 000 .10 .10 0 0 AC-FT 0 3.8 222 21 11 76 9.3 CAL YR 1967 TOTAL 211.80 MEAN .58 MAX 44 MIN 0 AC-FT 420 HTR VR 1968 TOTAL 172.80 MEAN .47 MAX 44 MIN 0 AC-FT 343 TIJUANA RIVER BASIN

11012000 COTTONWOOD CREEK ABOVE TECATE CREEK, NEAR DULZURA, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND. MATER VEAR OCTOBER 1968 TO SEPTEMBER 1969

5.1 4.8 4.8 4.6 4.4 4.4 4.4 9.1 4.1 7.4 3.9 5.8 3.9 5.1 4.1 4.1 3.9 3.7 3.7 .20 3.2 3.6 .20 2.8 3.2 .10 2.7 2.0 1.7

.10 .10 .10 .10

8.3 7.7 13 6.9 5.8 S.4 TOTAL 0 189.60 1.186.5 926.9 79.20 MEAN 0 6.12 42.4 29.9 2.64 - HAX 0 .56 472 81 5.1 MIN 0 0 1,9 5.4 .40 AC-FT 0 376 2.350 1.B40 157

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1*70 NOV DEC JAN FEB MAR APR MAV JUN ' JUL

0 .05 .33 .01 0 .06 .33 .05 0 .07 .33 .10 0 .07 .25 .10 0 .05 .25 .06 0 .05 .22 .04 0 .07 .22 .03 0 .09 .17 .03 0 .10 .17 .01 .01 .12 .17 0 .02 .14 .17 0 .03 .14 .17 .06 .04 .57 .12 .19 .05 _«_« .10 .09 .05 -_ .10 .04 .05 .10 TOTAL 0 .25 2.82 22.09 1.20 MEAN 0 .008 .10 .71 .040 MAX 0 .05 .57 6.0 .19 MIN 0 0 .04 .10 0 AC-FT 0 .5 5.6 44 2.4 CAL VR 1969 TOTAL 2,390.00 MEAN 6.55 MAX 472 MIN 0 AC-FT 4.740 WTR VR 1970 TOTAL 26.39 MEAN .07 MAX 6.0 MIN 0 AC-FT 52 TIJUANA RIVER BASIN

11012500 CAMPO CREEK NEAR CAMPO, CALIF. LOCATION.--Lat 320 35'28", long 116°31'29", in SWsNE'iiSE'i; sec.24, T.18 S., R.4 E., San Diego County, on left ba just upstream from bridge on State Highway 94, 3.5 miles southwest of Campo. DRAINAGE AREA.--85.0 sq mi, of which 3 sq mi is in Mexico. PERIOD OF RECORD.--October 1936 to September 1970. GAGE.--Water-stage recorder and broad-c sted weir. Datu 3f gage 2,178.92 ft above mean sea level. Prio Dec. 1, 1954, at datum 1 ft higher. AVERAGE DISCHARGE.--34 years, 1.86 cfs (1,350 acre-ft per year); median of yearly discharges, 0.1 cfs (72 acre-ft per year). EXTREMES,--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (20 cfs), water years 1966-70 Date Time Disch. Date Disch. Date Nov. 22, 1965 2400 *1.0 Nov. 19, 1967 0700 *.60 Mar. 5, 1970 Sept.29, 1967 0600 .50 1.20 Feb. 26, 1969 1600 *10 1.78 Annual minimum daily discharge, water years 1966-70 Wtr yr Date Discharge Wtr y Date Discharge 1966 Most of time 1969 Long periods 0 1967 do. 1970 Sept. 26-30, 1970 .04 1968 Entire year 0 Period of record: Maximum discharge, 880 cfs Feb. 6, 1937 (gage height, 4.80 ft, present datum), from rating curve extended above 110 cfs on basis of velocity mean-depth relation and cross-sectional area at con­ trol; no flow for part of most years. REMARKS.--Records good. No gage-height record Mar. 1 to Apr. 9, 1969. Flow partly regulated since August 1956 by small conservation reservoir. No diversion above station. REVISIONS (WATER YEARS).--WSP 1635: 1937-38, 1940(m). WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEARS OCTOBER 1966 TO SEPTEMBER 1968

NOV. 22, 1965.... .30 MAR. 22, 1967.... .10 APR. 8, 1967... APR. 30, 1967.... MAY 1......

j_ 2 3 . . . 4. 5» ...... 7...... 1

9 2

MONTH CFS-DAYS MAXIMUM .013 .007 .0030 2.2

.2 1.4

.068 4.2 .087 5.2 .077 4.8 .020 7.10 .20 .020

NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. TIJUANA RIVER BASIN

11012500 CAMPO CREEK NEAR CAMPO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

MOV DEC JAN FEB MAR APR MAY JUN JUL

.70 1.0 .70 .60 .20 Z 0 .50 1.0 .70 .50 .20 .20 .20 3 0 .40 1.0 .70 .50 .20 .20 .20 4 0 .40 1.0 .80 .50 .20 .20 .20 5 0 .40 1.0 .90 .50 .20 .20 .20

6 0 .40 1.0 1.0 .50 .20 .20 .20 7 0 .40 1.0 1.0 .60 .20 .20 .20 8 0 .40 1.0 .80 .60 .20 .30 .20 9 0 .40 1.0 .80 .60 .20 .20 .20 10 0 2.0 1.0 .70 .60 .20 .20 .20

11 0 1.3 1.0 .70 .60 .20 .20 .20 12 0 1.2 1.0 .70 .70 .20 .20 .20 13 0 1.3 1.0 .60 .60 .20 .20 .20 14 0 1.2 1.0 .60 .50 .20 .20 .20 15 0 1.1 1.0 .60 .40 .20 .20 .20

16 0 1.1 .80 .60 .40 .20 .20 .20 17 0 1.1 .80 .60 .40 .20 .20 .20 18 0 1.0 .80 .60 .30 .20 .20 .20 19 0 1.0 .BO .60 .30 .20 .20 .20 20 0 1.0 .80 .60 .30 .30 .20 .20

21 0 1.1 .80 .70 .30 .20 .20 .20 22 0 1.1 .80 .70 .30 .20 .20 .20 23 0 1.0 .80 .70 .30 .20 .20 .20 24 0 1.0 .80 .70 .30 .20 .20 .20 25 .20 0 1.0 .80 .80 .30 .20 .20 .20

26 2.2 1.0 .80 .BO .30 .20 .20 .20 27 4.9 1.0 .70 .80 .20 .20 .20 .20 1.8' 28 . 1.0 .70 .80 .20 .20 .20 .20 29 1.0 -" .80 .20 .20 .20 .20 30 ______1.0 .70 .70 .20 .20 .20 .20 31 - ______1.0 .60 .20 .20

TOTAL 0 0 .20 8.9 28.50 26.60 22.40 12.60 6.30 6.30 6.00 MEAN 0 0 .007 .32 .92 .89 .72 .42 .20 .20 .20 MAX 0 0 .20 4.9 2.0 1.0 1.0 .70 .30 .30 .20 MIN 0 0 0 0 .40 .70 .60 .20 .20 .20 .20 AC-FT 0 0 .4 18 57 53 44 25 13 13 12

CAL YR 196B TOTAL o.oo MEAN .000 MAX .00 MIN 0 AC-FT 0 HTR VR 1969 T07AL 117.80 MEAN .32 MAX 4.9 MIN 0 AC-FT 234

DISCHARGE f IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

DAY OCT NOV JUL AUG SEP

1 .17 .05 .09 .09 .1 .24 .09 .14 .09 .06 .06 .07 2 .14 .05 .09 .09 .1 .24 .09 .11 .09 .06 .06 .07 3 .14 .05 .09 .09 .1 .17 .09 .11 .09 .06 .06 .07 4 .11 .05 .09 .09 .1 .17 .09 .14 .09 .06 .09 .07 5 .11 .05 .09 .09 .1 .56 .09 .14 .09 .06 .09 .06

6 .09 .06 .09 .09 .1 .39 .09 .14 .09 .06 .09 .06 7 .09 .09 .09 .09 .1 .24 .11 .14 .09 .05 .09 .06 8 .06 .09 . 09 .09 .1 .24 .11 .14 .09 .05 .09 .06 9 .06 .09 .09 .09 .1 .05 .09 .06 10 .11 .05 .09 .06

11 .06 .10 .09 .11 .17 12 .06 .10 .09 .11 .17 .20 .14 .11 .09 .06 .09 .05 13 .05 .09 .09 .11 .17 .20 .14 .09 .09 .06 .06 .05 14 .05 .09 .09 .11 .17 .20 .14 .09 .09 .06 .06 .05 19 .05 .08 .09 .11 .17 .20 .14 .09 .09 .06 .11 .06

16 .06 .10 .09 .11 .17 .17 .14 .09 .09 .06 .09 .05 17 .06 .10 .09 .14 .17 .17 .14 .09 .06 .05 .09 .05 18 .06 .09 .09 .11 .17 .14 .14 .09 .06 .09 .09 .05 19 .06 .09 .09 .11 .17 .14 .14 .09 .06 .06 .09 .05 20 .06 .09 .09 .11 .17 .14 .14 .09 .06 .11 .09 .05

21 .06 .09 .09 .11 .17 .14 .14 .09 .06 .09 .09 .05 22 .06 .09 .09 .11 .17 .14 .14 .09 .06 .09 .09 .05 23 .06 .09 .09 .11 .17 .11 .14 .09 .06 .09 .09 .05 24 .06 .09 .09 .11 .17 .11 .14 .09 .06 .09 .OB .05 25 .06 .09 .09 .11 .17 .11 .14 .09 .06 .09 .08 .05

26 .05 .09 .09 .11 .17 .11 .14 .09 .06 .09 .08 .04 27 .05 .09 .09 .14 .17 .11 .24 .09 .06 .09 .08 .04 28 .05 .09 .09 .14 .20 .09 .20 .09 .06 .09 .OB .04 29 .05 .09 .09 .14 .09 .17 .09 .06 .09 .08 .04 30 .05 .09 .09 .14 _____ .09 .17 .09 .06 .09 .07 .04 31 .05 .09 .14 _____ .09 _____ .09 .09 .07

707 AL 2.20 2.52 2.79 3.44 4.55 5.75 4.06 3.30 2.30 2.22 2.56 1.61 MEAN .071 .084 .090 .11 .16 .19 .14 .11 .077 .072 .083 .054 MAX .17 .11 .09 .14 .20 .56 .24 .14 .11 .11 .11 .07 MIN .05 .OS .09 .09 .14 .09 .09 .09 .06 .05 .06 .0* AC-FT 4.4 5.0 5.5 6.8 a n 11

CAL YR 1969 TOTAL 125.31 MEAN .34 MAX 4.9 MIN 0 AC-FT 249 H7R YR 1970 TOTAL 37.30 MEAN .10 MAX .56 MIN .04 AC-FT 74 TIJUANA RIVER BASIN

11013000 TIJUANA RIVER NEAR DULZURA, CALIF. LOCATION.--Lat 32°33'56", long 116°46'27", in E% sec.33, T.18 S., R.2 E., San Diego County, on left bank 0.5 mile downstream from confluence of Cottonwood and Tecate Creeks and 5.5 miles south of Dulzura. DRAINAGE AREA.--481 sq mi, of which 70 sq mi is in Mexico. PERIOD OF RECORD.--October 1936 to September 1970. GAGE.--Water-stage recorder. Datum of gage is 542.42 ft above mean sea level (levels by International Boundary and Water Commission). Prior to Sept. 19, 1939, at datum 2.00 ft higher. AVERAGE DISCHARGE.--34 years, 10.9 cfs (7,900 acre-ft per yea dian of yearly mean discharges, 1.1 cfs (800 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gagi it in feet) for the water ye 1966-70 are contained in the following table: Minimum daily Wtr yr Date Discharge G.H. Date Discharge 1966 Nov. 23 1965 251 3.67 Long periods 1967 Dec. 7 1966 1,770 5.56 Many days 1968 Mar. 8 1968 2,130 5.83 Oct. 1 to Nov 18, 1967 1969 Feb. 26 1969 1,330 5.45 Several days 1970 Mar. 5 1970 21 2.69 Sept. 8, 1970 Period of record: Maximum discharge, 4,700 cfs Feb. 7, 1937 (gage height, 8.50 ft, present datum), from rating curve extended above 300 cfs on basis of velocity, mean-depth, and area studies; no flow for part of most years. REMARKS.--Records good. Flow regulated by Morena Reservoir (capacity, 50,210 acre-ft) and Barrett Reservoir (capacity, 44,760 acre-ft). Water diverted from Cottonwood Creek at Barrett Dam by Dulzura conduit to Jamul Creek. COOPERATION.--Thirty-six discharge measurements furnished by International Boundary and Water Commission. REVISIONS (WATER YEARS).--WSP 1635: 1939-41(M), 1943(M), 1948-49. WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FEB MAR APR NAY JUN JUL Aue 1 0 3.1 .0 .2 2. .30 2 0 2.4 8 .4 2. .30 3 0 1.9 .9 .9 2. .20 4 0 1.6 .5 .7 1. .20 9 0 1.2 .1 .B 1. .20 6 0 .BO .6 .4 1. .20 7 0 .70 .9 .3 1. .10 B 0 .60 .5 .0 1. .10 9 0 1.1 ' .4 .4 1. .10 10 0 1.3 2 .1 1. .10 11 0 .BO 1 9 .8 1. .1C 12 0 .70 .6 .9 1. 13 0 1.1 .4 .5 \ m 14 0 3.4 .3 .2 1. 15 0 5.1 3 .9 1. 16 0 14 .9 .7 1. IT 0 IS .9 .7 1. 18 0 11 .9 .6 .90 19 0 B.I .9 .6 .80 20 0 6.9 .3 .6 .70 21 0 5.5 .6 .4 .70 22 0 7.B .0 .8 .60 23 142 6.9 .0 .7 .40 24 28 5.5 .8 .B .40 25 21 4.B .7 0 .60 26 16 4.2 .8 .7 .40 27 11 3.7 ,4 w 3 .40 28 7.2 3.4 .1 , 1 .40 29 5.1 5.7 .0 .40 30 3.9 20 .2 .40 31 9.4 .3 .30 TOTAL 0 234.2 157.70 10 .2 8 .5 31.50 1.90 MEAN 0 7.81 5.09 3 33 2 95 1.02 .063 MAX 0 142 20 .0 .0 2.7 .30 MIN 0 0 .60 .7 .7 .30 0 AC-FT 0 465 313 205 164 62 3.B CAL YR 1965 TOTAL 433.40 MEAN 1.19 MAX 142 MIN 0 AC-FT B60 NTR YR 1966 TOTAL 611.00 MEAN 1.67 MAX 142 MIN 0 AC-FT 1,210 TIJUANA RIVER BASIN

11013000 TIJUANA RIVER NEAR DULZURA, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

JUN JUL AUG SEP 1 0 .5 3.8 .70 .40 .90 .20 .10 .10 2 0 .5 3. .60 .40 .90 .20 .10 .10 3 0 .4 3. .60 .30 .90 .20 .10 .10 4 0 .4 3. .70 .30 .90 .20 .10 .10 5 43 .5 3. .60 .20 .90 .20 .10 .10

6 476 .4 2. .60 .20 .80 .20 .10 .10 7 657 .1 2. .60 .20 .70 .20 .10 .10 8 63 .90 2. .60 .10 .70 .20 .10 .10 9 32 .0 2. .60 .10 .60 .20 .10 .10 10 27 .0 1. .60 .ID .60 .20 .10 .10

11 13 .1 1. .70 1.7 .60 .20 .10 .10 12 9.8 .3 1. .60 6.8 .50 .20 .10 .10 13 6.8 .3 1. .60 3.4 .50 .30 .10 .10 14 5.3 .2 1. 1.8 1.5 .40 .30 .10 0 15 4.3 .2 1. .90 1.0 .30 .30 .10 0 16 3.4 .3 1. .60 .70 .20 .20 .10 0 17 3.2 .2 1. .40 .50 .20 .20 .10 0 18 2.9 .0 1. . 0 .50 .20 .20 .10 0 19 2.5 .0 1. . 0 1.7 .20 .20 .10 0 20 2.5 .2 1. . 0 2.1 .20 .20 .10 0 21 2.4 .4 .80 . 0 1.4 .20 .20 .10 0 22 2.1 .4 .80 . 0 2.2 .20 .20 .10 0 23 1.9 3 .80 .30 2.1 .20 .10 .10 0 2* 1.9 .4 .80 .30 1.5 .20 .10 .10 0 25 1.8 1 .70 .30 1.4 .20 .10 .10 0 26 t.9 .8 .70 .30 1.1 .20 .10 .10 0 27 1.7 .2 .70 .30 .90 .20 .10 .10 0 28 1.7 .1 .70 .30 .90 .20 .10 .10 0 29 1.8 , 5 «.__. .40 .90 .20 .10 .10 0 30 2.7 1 .40 .90 .20 .10 .10 0 31 1.8 1 . 30 .20 .10 0 TOTAL 16.70 35.50 13 .40 5.50 3.10 1.30 MEAN 0 0 44.3 3.60 - 1.70 .54 1.18 .43 .18 .10 .042 MAX 0 0 657 31 3.8 1.8 6.8 .90 .30 .10 .10 MIN 000 .90 .70 .30 .10 .20 .10 .10 0 AC-FT 0 0 2,720 221 94 33 70 27 11 6.2 2.6

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEM ER 196B DAY

1 0 .10 1.2 .50 .90 .30 .20 .10 .10 .10 2 0 .10 1.1 .50 4.8 .30 .20 .i

TOTAL 0 1.50 ~ ITS. 80 35.00 36.90 463.20 29.40 6 .70 4.80 3.10 3.10 3.00 MEAN 0 .050 5.67 1.13 1.27 14.9 .98 .22 .16 .10 .10 .10 MAX 0 .20 B6 1.5 3.8 364 4.8 .30 .20 .10 .10 .10 MIN 0 0 .10 .60 .60 .40 .20 .20 .10 .10 .10 .10 AC-FT 0 3.0 349 69 73 919 SB 13 9.5 6.2 6.2 6.0 CAL YR 1967 TOTAL 411.80 MEAN 1.13 MAX 86 MIN 0 AC-FT B17 TIJUANA RIVER BASIN

11013000 TIJUANA RIVER NEAR DULZURA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY DCT NOV DEC JAN FEB MAR APR HAY JUN JUL 1 .20 .20 0 .10 11 94 7.2 .0 .40 .10 2 .20 .10 0 .10 8.2 77 7.2 .0 .50 .10 3 .20 .20 0 .10 5.9 66 T. 8 .90 .30 .10 4 .20 .30 .10 .10 5.3 60 7.5 .0 .30 .10 5 .10 .30 .10 .10 5.6 SO 6.8 .1 .30 .10 6 .10 .20 .10 .10 22 44 7.5 .1 .60 .20 7 .10 .20 .10 .10 30 42 6.8 .1 .60 .20 8 .10 .20 .10 .10 19 38 6.8 .0 .50 .20 .10 9 .20 .10 .10 .10 16 31 6.8 .90 .40 .20 .10 10 .20 .20 .10 .10 13 44 7.2 .80 .40 .20 11 .20 .10 .10 .10 11 62 7.2 .80 .40 .20 12 .20 .10 .10 .10 10 43 6.5 .60 .50 .20 13 .20 .10 .10 .10 8. 60 5.9 .60 .50 .20 14 .10 .20 .10 .60 .40 .20 15 .10 .20 .10 .10 6. 45 4.5 .60 .40 .20 16 .20 .20 .10 .10 6. 38 4.1 .60 .30 .20 17 .10 .10 .10 .10 4. 33 3.6 .60 .20 .20 18 .10 .10 .10 .10 11 31 3.6 .50 .20 .20 19 .20 .10 .10 .10 43 26 3.4 .50 .10 .20 20 .10 0 .20 .10 33 21 3.4 .50 .10 .20 21 .10 0 .20 .10 31 22 3.2 .60 .10 .20 22 .10 .10 .20 1.7 104 42 3.2 .60 .10 .20 23 .10 .10 .10 1.3 112 32 3.2 .70 .10 .20 24 .20 .10 8.2 96 21 3.0 .60 .10 .20 25 .20 .10 82 150 15 2.7 .60 .10 .20 26 .20 .20 95 814 11 1.9 .60 .10 .20 27 .10 .10 47 239 9.4 1.4 .40 .10 .20 28 .10 .10 27 123 9.0 1.0 .40 .10 .20 29 .10 .10 24 8.2 1.0 .40 .10 .20 30 .10 .10 16 7.5 1.0 .40 .10 .20 31 .10 .10 12 » 7.2 .40 .20 .10 155.3 140.5 21.50 a. 40 5 .70 3.30 MEAN .15 .11 .10 10.2 69.5 37.3 4.68 .69 .28 .18 .11 MAX .20 .30 .20 95 814 94 7.8 1.1 .60 .20 .20 KIN .10 0 0 .10 4.8 7.2 1.0 .40 .10 .10 .10 AC-FT 2, 290 279 43 17 11 6.6

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR DCT08 ER 1969 TO SEPTEMBER 1970 DAY OCT NOV DEC JAN FEB MAR, APR HAY JUN JUL 1 .16 .14 .11 .16 .16 2.3 1.0 .28 .16 .11 .08 z .22 .14 .11 .14 .16 4.6 .94 .25 .14 .11 .08 3 .25 .14 .11 .14 .14 1.5 .86 .22 .14 .11 .08 4 .19 .11 .11 .16 .14 .94 .78 .22 .11 .11 5 .19 .14 .11 .19 .14 9.2 .64 .22 .11 .11

.19 .14 .14 .11 .16 .58 .28 .22 .14 .19 .16 .11 .11 .25 1.3 .25 .22 .16

.19 .16 .14 .11 .28 1.5 .22 .22 .14 .19 .14 .16 .14 .28 .86 .19 .22 .11 .19 .11 .14 .14 .32 .70 .22 .22 .11 .16 .11 .14 .14 .37 .64 .19 .22 .11 .16 .14 .14 .16 .37 .64 .19 .19 .11

.19 .14 .14 .16 .37 .64 .22 .16 .11 .16 .14 .14 .19 .37 .70 .25 .16 .11 .19 .14 .16 .19 .37 .64 .22 .16 .11 .16 .14 .16 .19 .37 .58 .25 .16 .11 .16 .14 .14 .19 .37 .58 .25 .19 .11

.16 .16 .14 .19 .42 .64 .22 .19 .11 .16 .16 .19 .19 .42 .64 .22 .19 .14 .19 .16 .19 .19 .42 .86 .22 .22 .14

.16 .16

.16 .16 .22 .19 .47 1.1 .19 .19 .14 .16 .14 .22 .19 .47 1.3 .37 .22 .14 .16 .14 .19 .19 .58 .94 .37 .22 .14 .16 .11 .19 .19 .»« 1.0 .42 .19 .14 .16 .11 .16 .19 . .« 1.2 .32 .16 .14 .14 .19 .16 1.1 .16

5.48 4.30 4.69 5.01 8.76 42.36 10.73 6.34 3.89 2.66 .18 .14 .15 .16 .31 1.37 .36 .20 .13 .086 .25 .19 .22 .19 .58 9.2 1.0 .28 .16 .11 .14 .11 .11 .11 .14 .58 .19 .16 .11 11 8.5 9.3 9.9 17 84 21 13 7.7

>9 TOTAL 3,614.87 MEAN 9.90 MAX 814 MIN . 10 AC-FT 7,170 MTR YR 1970 TIJUANA RIVER BASIN

11013200 RODRIGUEZ RESERVOIR AT RODRIGUEZ DAM, , MEXICO LOCATION.--Lat 32°26'40", long 116°54'25", Baja California, Mexico, at Rodriguez Dam on Rio de las Palmas, 0.2 mile upstream from Arroyo Matanuco and 10 miles southeast of Tijuana, DRAINAGE AREA.--977 sq mi, of which 10 sq mi is in the United States. PERIOD OF RECORD.--April 1937 to September 1970. Published with record for Tijuana River near Nestor, Calif., October 1953 to September 1957. Monthend contents for April 1937 to September 1950 published in WSP 1315-B and for October M50 to September 1960 in WSP 1735. GAGE.--Nonrecording gage. Altitude of gage is 250 ft (from topographic map). EXTREMES.--Maximum and minimum contents, in acre-feet, for the water years-1966-70 are contained in the following table: Maximum Minimum Wtr yr ents Date 1966 . 2-5, 1966 ,640 Oct. 1 to Nov. 22, 1965 1967 . 12, 1966 ,160 Sept.30, 1967 1968 . 1, 1967 ,432 'Sept.30, 1968 1969 . 24-28, 31, Apr. 6-20, 1969 ,210 Jan. 25, 1969 1970 1, 1969 ,620 Sept.30, 1970 2,190 Period of record: Reservoir spilled during March 1938, September 1940, February to May 1941, March 1942, February and March 1944; reservoir dry Apr. 2, 1964, to Apr. 9, 1965, Aug. 21 to Nov. 22, 1965. REMARKS.--Reservoir is formed by a thin-shell concrete-arch dam completed in 1936; storage began in 1937. Capac­ ity table is based on surveys made in 1927. Maximum storage at crest of spillway gates (elevation, 410.10 ft), 111,070 acre-ft; at spillway lip (elevation, 380.08 ft), 74,580 acre-ft; dead storage below outlet (elevation, 267.39 ft), 1,650 acre-ft included in contents. Reservoir stores water for irrigation of 3,000 acres on both banks O.S to 5.5 miles downstream and for municipal supply for city of Tijuana. REVISIONS.--WSP 1928: Drainage area. MONTHEND CONTENTS, MATER YEARS OCTOBER 1965 TO SEPTEMBER 1970 MONTH CONTENTS CHANGE IN MONTH CONTE* *TS CHANGE IN (ACRE-FEET) CONTENTS (ACRE- EET) CONTENTS (ACRE-FEET) (ACRE-FEET) OCT. 31, 1965...... 0 269 -135 NOV. 30...... 1,765 175 -94 DEC. 31...... 4,122 110 -65 -1,197 JAN. 31, 1966..... +202 672 +762 FEB. 26...... 4,631 +307- .290 +5,416 -136 ,210 +920 APR. 30...... 4,293 -202 ,150 -60 .... 4,153 -140 ,960 -190 JUNE 30...... 3,967 -166 ,730 -230 -654 ,310 -420 -554 ,900 -410 SEPT. 30...... 2,350 -409 ,630 -270 +5,226 -397 ,300 -330 NOV. 30...... 1,726 -225 ,050 -250 DEC. 31...... +2,316 ,660 -190 CAL YR 1966...... -76 CAL YR 1969...... 4,126 +62 ,670 -190 FEB. 28...... 4,041 -65 ,360 -310 MAR. 31...... 3,675 -366 ,340 -20 .... 3,330 -345 ,200 -140 -536 ,050 -150 JUNE 30...... 2,356 -438 ,540 -510 JULY 31...... 1,673 -463 ,060 -460 AUG. 31...... 1,619 -254 ,600 -460 -167 ,190 -410 .... -916 OCT. 31...... 1,274 DEC. 31...... 1,307 .... JAN. 31, 1966...... 1,203 -104 FEB. 29...... 1,111 -92 .... 1,012 -99 -156 -79 JUNE 30...... 692 -65 JULY 31...... 625 -67 .... 513 -112 SEPT. 30...... 404 -109 WTR YR 1966...... TIJUANA RIVER BASIN

11013500 TIJUANA RIVER NEAR NESTOR, CALIF.

DRAINAGE AREA.--1,690 sq i, of which 1,236 sq mi is in Mexico. PERIOD OF RECORD.--Octobe 1914 to September 1915, October 1936 to September 1970.

changes prior to Aug. 6, 1958. AVERAGE DISCHARGE.--35 years, 32.1 cfs (23,260 acre-ft per year); median of yearly mean discharges, 3.1 cfs (2,200 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water years 1966- 70 a Minimum Wtr yr Date Discharge G.H. Date Dischai 1966 Nov. 73 1965 267 5.75 Most of time 1967 Dec. 7, 1966 2,020 8.35 do. 1968 Df>r 18, 1967 150 3.61 do. 1969 Ffih, 26, 1969 553 5.43 do. 1970 Mar. 5, 1970 20 2.90 do.

no fl

1970 are published in reports of the Geological Survey. COOPERATION.--Seven discharge measurements furnished by San

REVISIONS.--WSP 1928: Dr

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1970

NOV. 23, 1965.... 91 FEB. 7, 1966.... 2.8 JAN. 25, 1969... .10 .10 8.6 3.4 1.4

23, 1967....

18 12 8.3 6.1 2.7 .30 , 2.4 334 7.2 329 4.7 182 .20 1968 124 1, 1970.... 5.0 6.3 1969 6.3

0 22. RUNOFF IN ACRE-FEET NOVEMBER 1965...... 107.20 3.57 213 DECEMBER...... 169.90 5.48 337 CAL YR 1965...... 276.80 .76 553

JANUARY 1966...... 8.10 3.9 .26 16 FEBRUARY...... 3.10 2.8 .11 SEPTEMBER...... 10 .10 .003 WTR YR 1966...... 288.40 .79

DECEMBER 1966...... 1,129.20 CAL YR 1966...... 1,140.50

JANUARY 1967...... 4.1 4.1 .13 APRIL...... 3.2 1.6 .11 6.4 WTR YR 1967...... 1,136.50 907 3.11 2,250

NOVEMBER 1967. 44.80 1.49 DECEMBER...... 55.60 1.79 CAL YR 1967. 107.70 .30

MARCH 1968.... 20.5 .66 WTR YR 1968. 120.90 .33 CAL YR 1968. 20.50 .05

JANUARY 1969...... 37.20 1.20 74 FEBRUARY...... 1,275.20 334 45.5 2,530 MARCH...... 580.30 124 18.7 1,150 WTR YR 1969...... 1,892.70 334 5.19 3,750 CAL YR 1969...... 1,892.70 334 5.19 3,750

35

NOTE. FLOW OCCURRED ONLY ON DA.YS LISTED ABOVE. OTAY RIVER BASIN

11014000 JAMUL CREEK NEAR JAMUL, CALIF.

DRAINAGE AREA.-- 70.3 sq lni . .--April

GAGE.--Water-sta

EXTREMES .- -Maximurns and ininimums (discharge in cubic feet per second, gage height in feet) for the water years

Maximum Minimum Wtr yr Date Discharge G.H. Date Discharj 1966 Nov. 23, 1965 680 3.60 Long periods 1967 Dec. 6, 1966 2,720 5.56 do. 1968 Mar. 8, 1968 230 3.36 do. 1969 Feb. 26, 1969 1,060 4.07 Many days 1970 Apr. 27, 1970 34 2.23 Long periods Period of record: Maximum discharge, 4,000 cfs Dec. 1, 1947 (gage height, 6.42 ft, present datum), from

REMARKS. --Re cord discharges in Creek via Dulzura Creek and is included in discharge for this station (see station 11012000). REVISIONS (WATER YEARS).--WSP 1565: 1952, 1954. WSP 1715: 1944, 1946. WSP 1928: Drainage are

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY JUN JUl

0 .51 .3 Z. . 20 0 17 40 0 .5 1 .7 3. 20 0 37 40 0 .5 1 .2 3. 0 .5 .2 .0 2. 20 0 39 39 0 .9 B .90 2. 2-0 0 39 41 0 .9 .BO 2. 20 0 39 37 0 .9 4 1. . 20 0 "4139 30 0 .B 3 1. 20 0 22 0 .4 2 1 ^ f 20 0 41 15 0 .7 2 1. 10 0 40 12 0 .90 2 !. . 10 0 39- 9.4 0 .BO 1 1. . 10 0 39 6.6- 3B 4.5 0 .5 1 1. 0 0 3".0 0 2 1 L 0 0 39 0 1 .2 1. 0 0 28 2.2

0 3 .1 1. 0 0 4.4 1.2 0 1 .0 1. 0 0 2.3 .50 0 . .3 1. 0 6.4 28 .30 0 .B 0 0 15 35 .20 0 .2 .80 0 12 39 .10 0 . .9 .70 0 3.7 44 0 .10 , ; .2 .60 0 2.B 46 0 193 .1 .50 0 2.B 45 0 IB <0 .B .50 0 1.9 44 0 9.2 0 .6 .70 0 1.9 43 0 7.3 .70 .9 .70 0 31 41 0 4. 4 .90 .B .70 0 39 41 0 2.5 .70 .5 .60 0 40 45 0 2.0 .60 .40 0 35 43 0 1.7 3 a. s .40 o 5.3 41 0 31 --..-. 2 3.6 .30 3.2 0

TOTAL MEAN 0 7.94 7.66 3.79 B.B7 1.33 .070 6.45 36.5 11.0 MAX MIN 0 0 .BO .60 .BO .30 0 0 2.3 0 AC-FT .2 397 2,170 67B OTAY RIVER BASIN

11014000 JAMUL CREEK NEAR JAMUL, CALIF.--CONTINUED

DISCHARGE, IN CUBIC F66T PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

OCT NOV DEC JAN FEB MAR APR MAY JUN JUL

1 0 15 20 3D .3 .1 .10 2 0 15 20 32 .3 .9 .10 3 0 15 20 31 .2 .8 .10 4 0 15 20 31 .0 .8 0 5 28 15 20 31 .0 .6 0

6 853 15 1 30 .9 .6 0 7 536 15 1 33 .9 .2 0 8 60 15 1 32 .8 .4 0 9 25 15 1 31 .7 .4 0 10 10 14 1 32 .5 .4 0 11 7> 14 1 30 .6 .3 0 12 5. 14 1 30 .9 .2 0 13 4. 14 1 30 .8 .0 0 14 3, 14 1 18 .8 .80 .10 15 3. 14 1 21 .6 .60 .10 16 2. 14 22 30 .6 .40 .10 17 2. 14 22 30 .5 .20 0 18 2, 14 22 24 .9 .20 0 19 2. 14 22 18 .7 .20 0 20 2. 14 21 13 .6 .20 0 21 2. 14 21 10 .4 .20 0 22 l^ 17 25 B.2 .B .20 0 23 1. 25 26 6.B .2 .20 0 24 4. 7.5 30 5. .1 .20 0 25 5. 19 30 4. .6 .20 0 26 g B 18 29 3. .9 .20 0 27 4. 18 28 2, 1 .6 .20 0 28 4, 18 31 .4 .20 0 29 13 18 2. .4 .20 0 30 15 19 .2 .20 0 31 21 2. .20 TOTAL 0 0 1.619. 4B3. 619 607. 10 .2 31.50 .60 MEAN 0 0 52. 15. 22.1 19. 3 34 1.02 .020 MAX 0 0 85 2 31 33 .9 3.1 .10 MIN 0 0 7. 19 2.3 .5 .20 0 AC-FT 0 0 3,210 95 1.2

DISCHARGE, IN CUBIC FEET PER SECOND. HATER YEA(

1 0 0 15 .20 0 .0 2 0 0 15 .20 0 .7 3 0 0 18 .20 0 .80 4 0 0 17 .20 0 .50 5 0 0 16 .20 0 .40

6 0 0 15 .10 0 .30 7 0 0 14 .10 0 .20 B 0 0 12 .10 36 .20 9 0 0 11 .10 $.1 .20 10 0 0 10 .20 1.8 .10 11 00 8.7 .20 1.3 .10 12 00 7.5 .20 1.0 .10 13 00 6.4 .40 .90 .10 14 0 1.7 5.7 .20 .80 15 0 8.5 5.1 .10 .70 16 0 12 3.4 .10 .60 17 0 13 1.8 .10 .50 18 0 28 1.2 .10 .40 19 0 50 .90 .10 .30 20 0 14 .70 .10 .20 21 0 17 .60 2.6 22 0 19 .60 5.3 23 0 19 .40 5.7 24 0 19 .40 6.6 25 0 18 .30 8.2 26 0 18 .30 6.0 27 .10 17 .5 0 4.4 28 0 17 .60 3.2 29 0 17 .40 2.5 30 0 16 .3 2.0 31 16 .3 1.5 TOTAL .10 320.2 1B9.1 3.20 97.60 >.70 0 MEAN .003 10.3 6.1 .11 3.15 .19 0 MAX .10 50 IB .40 36 1.7 0 MIN 0 0 .30 0 0 0 0 AC-FT .2 635 375 6.4 194 11 0 4.290 HTR YR 1968 TOTAL 615.90 MEAN 1.6B MAX 50 MIN 0 AC-FT 1,220 OTAY RIVER BASIN

11014000 JAMUL CREEK NEAR JAMUL, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

NOV DEC JAN FEB MAR APR MAY JUN JUL I 0 0 3.0 65 36 30 31 28 19 2 0 0 2.4 48 35 31 31 29 23 3 0 0 2.0 41 36 32 31 28 25 4 0 0 2.1 5 0 0 2.0 30 33 35 31 28 28 6 0 0 35 26 35 37 30 25 27 7 0 0 56 24 34 37 30 25 27 8 0 0 23 22 33 36 30 25 27 9 0 0 13 21 34 35 30 21 27 10 0 0 9.6 28 34 35 30 20 29

11 0 0 7.2 .09 12 0 0 6.1 20 34 34 34 21 29 .04 13 0 0 4.5 .04 14 0 3.2 3.8 .02 IS 0 .33 3.7 23 33 36 33 20 29 16 0 .16 3.5 20 31 35 32 20 28 IT 0 .17 3.3 19 31 35 33 19 28 18 0 .23 17 18 34 34 32 20 28 19 0 .24 64 20 32 33 31 19 28 20 .08 .30 63 21 31 33 31 20 27 21 .16 .45 41 27 31 33 31 20 26 22 .10 .34 24B 40 31 34 30 19 29 23 .10 .30 125 38 32 32 30 19 34 24 .04 .77 123 37 31 32 30 19 25 25 .04 68 271 26 .23 68 673 37 30 32 29 21 25 27 .24 46 163 38 30 32 29 18 25 28 .16 13 90 38 29 32 29 18 25 29 .10 11 38 29 32 29 19 11 30 0 5.9 i. - 1. . 38 30 32 28 18 5.8 31 0 3.5 36 31 19 3.8 TOTAL MAX 29 34 MIN 000 2.0 18 29 30 2B IB 3.8

CAL YR 589

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO SEPTEM )ER 1970 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUC 1 0 0 0 6.0 10 2B 27 28 1.7 2 0 0 0 6.2 l! 1 27 27 28 1.1 3 0 0 0 1.1 6. 5 26 30 27 .71 4 0 0 .21 .71 15 26 30 26 .46 5 0 0 .20 6.4 21 21 30 26 .26 6 0 0 .18 1.2 25 31 29 28 .11 7 .04 0 .31 .71 26 31 28 28 .09 a .04 0 .13 .54 27 31 30 28 .03 9 .03 0 .10 .46 27 31 29 29 .03 10 .02 0 .37 .53 28 31 30 28 .04 11 .01 0 .29 .40 28 31 29 28 .02 12 0 0 .16 .29 2B 31 29 27 13 0 .04 .16 .32 28 31 28 26 14 0 .02 .12 .32 28 31 28 25 15 0 .05 .10 .32 31 30 27 28 16 0 .19 .10 .29 31 30 27 27 .01 17 0 .10 .10 .24 31 29 27 25 .04 18 0 .13 .05 .24 30 29 27 24 .04 19 0 .10 .04 .24 30 29 26 24 20 0 .10 .04 .17 30 29 26 24 21 0 .10 0 .16 29 29 25 24 22 0 .10 0 .16 29 29 25 25 23 0 .10 0 .16 29 29 26 23 24 0 .10 0 .11 28 29 25 20 25 0 .10 0 .10 28 28 25 18 26 0 .10 0 .10 30 28 24 17 27 0 .04 0 .16 32 29 24 13 28 0 .04 0 .16 30 28 24 9.6 29 0 .04 ..... _ .16 30 2B 25 7.0 30 0 .01 ...... 13 29 27 29 3.9 31 0 ------.10 27 2.5 TOTAL 0 .14 0 1.46 2.66 2B.1B 765. 70 894 B16 697.0 4.64 MEAN 0 .005 0 .047 .095 .91 25 .5 28.8 27.2 22.5 .15 MAX 0 .04 0 .19 .37 6.4 32 31 30 29 1.7 MIN 0000 0 .10 . 10 21 24 2.5 0 AC-FT 0 .3 0 2.9 5.3 56 1,520 1,770 1,620 1.380 9.2

UTR YR ,370 SWEETWATER RIVER BASIN

11014850 JAPACHA CREEK NEAR DESCANSO, CALIF.

LOCATION.--Lat 32°55'04", long 116°34'14", San Diego C State Highway 79, 5.1 miles northeast of Descanso. DRAINAGE AREA.--2.40 sq mi. PERIOD OF RECORD.--Annual rs 1962-64. October 1964 to September 1967. Annual years 1968-70.

GAGE.--Crest-sta ge gage. Sept? 30, 1967, water-stageP recorder. P EXTREMES. --Maxim in feet) for the water years 1966-70 are c

Wtr yr Date Discha rge G.H. Date Discharge 1966 Nov. 23 965 3 5 3.80 Long periods 0 1967 Dec. 6 966 17 J 8.56 do. 0 1968 Dec. 18 967 2.4 2.37 - 1969 Feb. "25 969 9 7 5.55 - 1970 Mar. 14 970 a 3 - a Estimated.

Period of d M ' d' 5 cfs Dec. 6, 1966 (gage height, 8.5 6 ft), from rating curve

to Oct. 18, 1

DAY OCT DEC JUN JUL AUG SEP

1 0 .10 2.2 .60 . .50 .30 .10 2 0 .10 1.6 .70 . .50 .30 .10 3 0 .10 1.4 .70 . .50 .30 .10 4 0 .10 1.2 .70 . .50 .30 .10 5 0 .10 1.1 .70 . .40 .30 .10

6 0 .10 1.0 .6 . .40 .30 .10 7 0 .10 .90 .9 . .40 .30 .10 8 0 .10 .80 .8 . .40 .30 .10 9 0 .20 .70 .4 . .40 .30 .10 10 0 .3D .60 .4 . - .40 .30 .10 11 0 .30 .60 .1 . .40 .30 .10 12 0 .30 .50 .2 . .40 .30 .10 13 0 .60 .50 .0 . .40 .20 .10 14 0 .50 .50 .0 . .40 .20 .10 15 0 .50 .50 .8 . .40 .20 .10

16 0 .50 .50 .8 . .40 .20 17 0 .40 .50 .7 . .40 .20 18 0 '.40.40 .50 .6 . .40 .20 19 0 .50 .5 . .40 .20 20 0 .40 .50 .5 .80 .40 .20 21 0 .40 .50 .5 .80 .40 .20 22 1.6 1.2 .50 .4 .80 .40 .20 23 9.8 .90 .50 .4 .80 .40 .20 24 25 2.1 .60 .40 .4 .80 .40 .20 26 .70 .60 .40 .6 .80 .40 .10 27 .40 .50 .40 .5 .70 .40 .10 28 .40 .50 .40 .5 .60 .30 .10 29 .20 3.8 .40 .60 .30 .10 30 .20 6.7 .70 .50 .30 .10 31 2.7 .60 .50 .10 TOTAL 15. 80 24.20 21.80 4 .40 34.70 12.10 6.80 L.SO 00 MEAN .53 .78 .70 .66 1.12 .40 .22 050 0 0 MAX 9.8 6.7 2.2 3.9 1.7 .50 .30 .10 00 MIN 0 .10 .40 .60 .50 .30 .10 0 00 AC-FT 31 48 43 92 69 24 13 3.0 00 SWEETWATER RIVER BASIN

11014850 JAPACHA CREEK NEAR DESCANSO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 AY OCT NOV DEC

1 0 .10 .30 .10 30 .3 .50 2 D .10 .20 .10 .40 .2 .40 3 0 .10 .20 .10 30 .2 .40 4 c .10 .20 .30 40 .0 .40 5 6.7 .10 .20 .20 .40 .0 .40 6 76 .10 .20 .10 30 .BO .40 7 24 .10 .20 .10 30 .70 .40 3.2 9 l.B .10 .20 .10 20 .60 .40 10 1.1 .10 .20 .10 20 .70 .40 1 .70 .10 .20 .10 .40 .70 .40 2 .60 .10 .20 .10 50 .60 .40 3 .50 .10 .20 .10 0 .60 .40 4 .40 .10 .20 .60 .50 .30 5 .30 .10 .20 .30 .50 .30

6 .30 .10 .20 .20 .40 .30 7 B .20 .10 .20 .20 0 .40 .20 9 .20 .10 .20 .20 .40 .20 0 .20 .10 .20 .20 .50 .20 1 .20 .10 .20 .20 .50 .20 2 .10 .10 .20 .10 .50 .10 3 .10 .40 .20 .10 .50 .10 4 .10 .20 .10 .10 .50 .10 5 .10 .70 .10 .10 .50 .10 6 .20 .40 .10 .10 .40 .10 7 .10 .40 ;ic .10 .40 .10 B .10 .30 .10 .10.20 .50 .10 9 .10 .30 .50 0 0 .10 .20 ______.10 .50 0 1 . 10 .30 .20 .50 TAL 0 0 AN 0 0 3.80 .17 .19 .16 1 31 .63 .26 0 0 0 X 0 0 76 .70 .30 .60 >.4 1.3 .50 0 0 0 N 000 .10 .10 .10 20 .40 0 0 C 0 C-FT 0 0 233 11 10 9.7 78 39 16 0 0 0 SWEETWATER RIVER BASIN 31

11015000 SWEETWATER RIVER NEAR DESCANSO, CALIF. LOCATION.--Lat 32°50'05", long 116°37'20", in NW^SESj sec.25, T.15 S., R.3 E., San Diego County, on right bank at

DRAINAGE AREA.--45.5 sq mi.

;r 1956 to September 1970. GAGE. --Water-stage recorder on river; water-st; is 3,269.24 various da turns.

AVERAGE DISCHARGE. --Creek only, 36 years, 11.1 cfs (8,040 acre--ft per year); median of yearly megin discharge:

(2,960 acre-ft per year); median of yearly inean discharges, 1.0 cfs (720 acre-ft per year). EXTREMES.--Ma (discharge in feet pe econd, gage height in feet). 00 River only Combined Time Discharge G.H. Date Di icharge 1965 0700 *1,230 6.53 Nov. 23, 1965 *1,230 1965 0500 700 5.70 Dec. 30, 1965 700 1966 2330 *3,890 8.93 Dec, 6, 1966 *3,890 Apr 1967 1200 125 4.34 Apr. 22, 1967 125 1967 1400 *39 4.15 Dec. 19, 1967 *39 1969 1700 1,160 6.92 Jan , 25, 1969 1,160 1969 2400 195 4.90 Feb. 6, 1969 195 1969 2300 *1,750 7.62 Feb. 25, 1969 *1,750 1969 0500 164 4.63 Mar. 1, 1969 164 1970 0330 *48 4.02 Mar. 5, 1970

16, 1927 (gage height, 13.2 ft, from ement of peak flow; no flow for many 6, 1966; no flow for many days in each

REMARKS.--Re

REVISIONS (WATER YEARS).--WSP 1315-B: 1922(M). WSP 1928: Drainage

DISCHARGE, IN CUBIC FEET PER SECOND, NATER YEAR DC

DAY OCT 0 1.1 91 11 8.4 .4 2. C 1.0 59 9.2 14 .0 0 .80 41 9.2 12 .2 .10 0 .80 30 7.3 12 .7 . .10 0 .70 24 6.4 {2 .2 .90 .10 0 .70 21 13 12 .2 .90 0 .50 IB 58 12 .2 .90 0 .$0 16 40 12 .2 1.1 0 .8 14 33 10 .2 1.4 0 .8 12 39 9.5 .2 1.4

0 f j 12 37 B.B .5 1.3 0 .1 10 33 B.O .5 .90 0 .8 8.0 32 7.3 .2 .80 o .a 6.7 28 7.3 .0 . .70 D .8 6.4 27 6.4 .4 . .40

0 .0 6.7 24 5.8 .2 0 .8 7.6 22 5.0 .8 0 .i B.4 20 4.7 .5 . 0 .0 B.B 18 4.2 .0 0 .8 11 IB 3.8 .5 o .8 10 14 3.4 .5 67 1 B.4 12 3.2 .2 548 1 8.4 10 3.1 .2 . 15 7.6 8.8 13 .2 33 7.0 B.4 19 .2 36 . 7.0 11 16 .2 10 f B.4 12 14 .2 5.5 . B.O B.B 10 .1 3.4 2 6.7 B.4 .7 2.1 33 14 7.3 .7 . 31 11 16 6.7

TOTAL 720.0 577.70 513.1 570.1 279.3 12 .3 6 . MEAN 24.0 18.6 16.6 20.4 9.01 4 OB 19 MAX 548 331 91 58 19 4 . MIN 0 .50 6.4 6.4 3.1 .7 . AC-FT 1,430 1,150 1,020 1,130 554 243 122

CAL YR 1965 TOTA SWEETWATER RIVER BASIN

11015000 SWEETWATER RIVER NEAR DESCANSO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

MAR APR MAY JUN JUL

I 0 .20 3.6 5.8 1.7 6.4 10 8.8 .5 2 0 .20 3.4 5.5 1.7 6.7 8.8 7.3 .3 3 0 .BO 3.1 5.2 1.8 5.8 8.4 6.0 .1 0 71 3.2 4.7 4.7 6.4 7.0 5.8 .1

7 .50 681 2.9 4.5 3.4 4.5 5.2 5.5 .1 8 9 .20 25 2.7 4.2 3.1 5.5 .90 10 .20 15 2.7 4.2 3.1 4.7 5.0 5.5 .90

2 .10 2.9 3.B 3.4 15 5.5 5.5 1.1 3 .10 2.7 3.8 4.0 14 5.5 5.B 1.1 4 .10 2.4 3.6 14 17 5.5 5.5 .BO 5 .10 2.1 3.6 8.0 IB 5.5 5.0 .70

7 .10 2.1 3.1 5.0 12 5.5 4.0 .50 S .10 2.1 3.4 4.7 12 5.5 3.8 .40 9 .10 . ) 2.1 3.6 4.2 24 5.5 3.4 .40 0 .10 2.2 3.1 3.8 28 5.5 3.2 .40 1 .10 2.2 2.7 3.8 24 5.5 2.9 .20 2 .10 4.2 2.1 3.6 84 5.5 2.6 .20 3 .10 12 3.1 3.6 53 6.7 2.6 .20 4 .1C 8.4 2.7 3.4 39 B.O 2.4 .20 5 .10 17 3.1 3.4 27 7.0 2.4 .20

6 .10 10 2.7 3.6 20 7.3 2.1 .20 7 .10 7.6 2.0 3.6 18 7.3 2.0 .20 8 .10 7.0 1.8 3.4 16 8.0 2.0 .20 9 .10 6.0 4.7 16 8. 8 2.1 .20 0 .10 5.5 4.0 13 8.8 2.1 .20

TAL 131.1 19.90 2.10 AN .068 X 0 .50 1,620 17 5.8 14 84 10 8.8 1.5 .50 IN C 0 .20 2.1 1.8 C-FT

),250

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

NOV DEC JAN FES MAR APR MAY JUN JUL

1 0 .20 .60 .1 .0 .4 .1 .90 .40 2 0 .20 .40 .1 .0 .4 .7 .90 .40 3 0 .20 .40 .1 .9 ^ .7 .90 .40 4 0 .20 .40^ .1 .8 .4 .5 .90 .30 5 0 .20 .40 .0 .7 .5 .1 .90 .30

6 C .20 .40 .9 .7 .6 .0 .90 .30 7 0 .20 .40 .9 .7 .7 .9 .90 .40 8 0 .20 .40 .8 .8 .3 .8 .90 .40 9 0 .20 .20 .8 .9 .6 .7 .90 .40 10 0 .20 .20 .8 .9 .5 .7 .90 .30

11 .10 .20 .30 .a .8 .0 .6 1.0 .30 12 .10 .20 .30 .8 .8 .7 .5 1.6 .20 13 .10 .20 .40 .8 .1 .7 .0 2.5 .20 14 .10 .20 .40 .8 .0 .9 .3 2.0 .20 15 .10 .20 .40 .9 .8 9 .3 1.6 .20

16 0 .20 .60 .9 .6 B 9 .3 1.5 .10 17 0 .20 1.2 .9 .4 , 9 .4 1.4 .10 IB 0 .20 2.7 .9 .3 .9 .4 1.2 .10 19 0 .40 19 .9 .1 .9 .4 l.l .10 20 .10 .30 4.4 .9 .0 .7 .4 1.0 .10

21 .10 .50 2.7 .9 .0 . 5 .4 1.0 .10 22 .10 .70 2.4 .9 .0 .0 .3 .90 .10 23 .10 .60 2.4 .8 .90 .6 .2 .90 .10 24 .10 .40 2.4 .7 .1 .4 .1 .80 .10 25 .10 .30 2.4 .8 .1 .4 .1 .80 .10

26 .20 .60 2.4 .9 .1 .3 .0 .70 .10 27 .20 .80 2.4 .2 .2 .2 .0 .70 .10 28 .20 .60 2.2 .7 .4 .1 .0 .60 .10 29 .20 .50 2.2 .5 .3 .0 .90 .60 0 30 .20 .50 2.2 3 __ .0 .90 .50 0 31 .20 2.1 . 2 " .90 .50

TOTAL- 2.30 9.80 59.30 6 .1 4

MAX .20 .80 19 .7 2.1 3.8 4.7 2.5 .40 MIN 0 .20 .20 .7 .90 .90 .90 .50 0 AC-FT 4.6 19 118 21 88 129 97 63 12 SWEETWATER RIVER BASIN

11015000 SWEETWATER RIVER NEAR DESCANSO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FECT PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

NOV DEC JAN FE8 MAR APR MAY JUN JUL

0 .25 .56 14 132 35 16 8.4 .80 0 .19 .56 12 100 34 16 8.0 .90 0 .17 .42 10 80 40 16 7.6 1.0

6 0 .17 .51 62 58 37 21 7.4 1.2 0 7 0 .17 .51 92 54 34 21 7.2 1.1 0 a 0 .19 .51 49 50 31 20 7.1 .20 0 9 0 .31- .51 42 54 29 17 6.8 .50 .04 ID 0 .25 .34 35 79 28 16 6.8 .30 .27 11 0 .28 .38 32 82 28 15 6.7 .30 .18 12 0 .25 .51 31 81 26 14 6.4 .81 0 13 0 .22 .56 29 93 26 12 5.1 .81 0 14 0 .19 4.9 27 82 24 11 4.2 .34 0 15 .09 .19 2.5 26 76 24 10 3.4 .17 0 16 0 .25 1.4 29 75 24 9.9 3.4 .30 0 17 .09 .51 l.l 24 69 22 9.9 3.4 .23 0 18 .11 .34 1.0 28 66 21 9.6 3.2 .rt 0 19 .11 .22 1.4 39 63 21 9.2 2.9 .30 0 20 .09 .61 1.8 40 5B 20 8.6 2.9 .55 0 21 .09 .66 8.2 39 64 19 8.8 2.9 .34 0 22 .07 .56 2.5 43 74 19 9.0 2.9 .20 0 23 .05 .42 2.0 74 58 18 8.6 2.4 .17 0 24 .C5 .28 21 385 51 18 9.1 1.8 .12 0 25 .05 .42 382 698 48 18 9.0 2.1 .05 0

26 .05 1.7 163 607 46 17 8.5 2.0 .17 0 27 .09 1.0 119 178 46 16 8.2 2.0 .34 0 28 .19 .84 46 122 44 16 8.5 2.0 .17 0 29 .17 .72 32 42 16 8.3 1.8 .05 0 30 .19 .66 21 40 16 7.9 1.4 .03 0 31 .61 18 39 .01 0 TOTAL 0 1.49 13.13 750 13.61 .84 MEAN 0 .050 MAX 0 .19 1.7 382 698 132 40 21 8.4 1.2 .27 KIN 0 0 .17 .34 9.2 39 16 7.9 1.4 .01 0 1.7

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL .12 .97 .61 .44 20 .81 1.4 .23 .12 .74 .61 .49 26 .89 1.8 .03 .27 .«! .61 .49 12 1.2 1.6 .03 .44 .74 .61 .61 5 1.2 1.2 .03 .23 .61 .49 .49 2 1.0 1.0 -Cl .30 .61 .44 .49 .74 1.0 .02 .97 .49 .44 .61 .89 1.0 .01 .74 .49 .44 .67 .89 1.0 .01 .74 .97 .49 .34 .89 1.2 .03 1.0 »67 .97 1.0 .89 1.2 .05 .74 .61 .89 1.0 1.0 .74 .05 .27 .61 .55 .89 .55 .67 .55 .04 .61 .55 .89 .67 .44 .55 .04 .89 1.2 .49 .97 .39 .81 .34 .05 .74 .44 1.4 .44 .34 .02 .67 .81 .49 .89 .55 .39 .61 .55 .61 .81 .55 .30 .39 .39 .61 .61 .55 .30 .23 .74 .61 .39 .55 9 .27 .20 .55 .67 .49 .67 .44 .81 .34 .55 .34 .61 .55 .61 .74 .39 .30 .81 .67 .34 .67 .89 .44 .15 .81 .67 .49 7.6 .97 .49 .44 .89 .61 .49 1.0 .39 . l >

TOTAL MEAN .026 MAX .23 MIN 0 AC-FT 282 1.5

HIN 0 11015000 SWEETWATER RIVER NEAR DESCANSO, CALIF.--CONTINUED COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SWEETWATER RIVER AND SWEETWATER RIVER DIVERSION, NEAR DESCANSO, CALIF., WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 0 1.1 91 11 8.4 6.4 1.4 .10 2 c 1.0 59 9.2 14 . 6.0 1.3 .10 3 0 .80 41 9.2 12 5.2 1.1 .10 4 0 .80 30 7.3 12 4.7 . 1.0 .10 5 0 .70 24 6.4 12 4.2 .90 .10 6 0 .70 21 13 12 4.2 .90 .10 7 c .50 18 58 12 4.2 .90 0 8 c .50 16 40 12 4.2 1.1 0 9 0 1.8 14 33 10 4.3 ; . 1.4 0 10 0 1.8 12 39 9.5 4.5 1.4 0 11 0 2.1 12 37 4.7 1.3 0 12 0 2.1 10 33 8.0 4.6 .90 0 13 c 3.8 8.0 32 7.3 4.3 .80 . 0 1* 0 5.8 6.7 28 7.3 4.1 .70 0 15 0 5.8 6.4 27 6.4 3.5 .40 0

16 0 8.0 6.7 24 5.8 3.3 .40 0 17 0 5.8 7.6 22 5.0 3.9 .30 0 18 0 4.5 8.4 20 4.7 4.5 .30 0 19 {} 4.0 8.8 18 4.2 5.1 . .70 0 20 0 3.8 11 18 3.8 4.6 . .40 0 21 0 3. 8 10 14 3.4 4.6 . .20 0 22 67 11 8.4 12 3.2 4.2 . .20 0 23 548 13 8.4 10 3.1 3.4 B .20 0 24 15 7.3 7.6 a. 8 13 3.4 .20 0 25 33 6.0 7.0 8.4 19 3.4 .20 0 26 36 5.0 7.0 11 16 3.4 . .20 0 27 10 4.2 8.4 12 14 3.4 .20 0 28 5.5 4.0 8.0 8.8 10 3.3 .10 0 29 3.4 26 6.7 8.4 2.9 .10 0 2.1 331 14 7.3 3.0 .10 0 31 111 16 6.7 0

TOTAL .60 0 0 MEAN .64 .019 0 0 ^ MAX 0 548 331 91 58 19 6.4 1.4 .10 0 0 MIN 0 0 .50 6.4 6.4 3.1 2.9 .10 0 0 0 AC-FT 0 1,430 1,150 ItUlU l«13U 3^t 249 38 1.2 0 0

IN 0 AC-FT 5, 690

COMBINED DISCHARGE, IN CU£ 1C FEET PER SECOND , OF SWEETWATER RIVER AND SWEETWATER RIVER DIVERSION, NEAR DESCANSO, CALIF. , WATER YEAR OCTOBER 1 966 TO SEPTEMBER 1967 DAY OCT NOV

1 0 .20 3.6 5.8 1.7 6.4 10 8.8 1.5 .10 2 0 .20 3.4 5.5 1.7 6.7 7.3 1.3 .10 3 0 .80 3.1 5.2 1.8 5.8 8^4 6.0 l.l .10 4 0 .90 3.2 5.0 6.2 5.5 7.6 5.8 1.0 .10 5 C 71 3.2 4.7 4.7 6.4 7.0 5.8 1.1 .10 6 .1C lt62Q 3.1 4.5 3.4 5.2 6.7 6.0 1.1 .10 7 .50 681 1.1 .10 8 .20 73 .90 .10 9 .20 25 2.7 4.2 3.1 3.8 4.5 5.5 .90 .10 10 .20 15 2.7 4.2 3.1 4.7 5.0 5.5 .90 .10 11 .20 12 .SO .10 12 .10 9.2 2.9 3.8 3.4 15 5.5 5.5 1.1 .10 13 .10 6.4 2.7 3.8 4.0 14 5.5 5.8 1.1 .10 1* .10 5.2 2.4 3.6 14 17 5.5 5.5 .80 .10 15 .10 4.2 2.1 3.6 8.0 18 5.5 5.0 .70 .10 16 .10 4.2 2.2 3.4 5.5 15 5.5 4.5 .50 .10 17 .10 4.2 2.1 3.1 5.0 12 5.5 4.0 .50 0 18 .10 4.2 2.1 3.4 4.7 12 5.5 3.8 .40 0 19 .10 4.0 2.1 3.6 4.2 24 5.5 3.4 .40 0 20 .10 4.0 2.2 3.1 3.8 28 5.5 3.2 .40 0 21 .10 4.0 2.2 2.7 3.8 24 5.5 2.9 .20 0 22 .10 4.0 4.2 2.1 3.6 84 5.5 2.6 .20 0 23 .10 4.0 12 3.1 3.6 53 6.7 2.6 .20 .50 24 .10 4.0 8.4 2.7 3.4 39 8.0 2.4 .20 0 25 .10 4.0 17 3.1 3.4 27 7.0 2.4 .20 0

26 .10 4.2 10 2.7 3.6 20 7.3 2.1 .20 0 27 .10 4.2 7.6 2.0 3.6 18 7.3 2.0 .20 0 28 .10 4.2 7.0 1.8 3.4 16 8.0 2.0 .20 0 29 .10 4.0 6.0 _ __ 4.7 16 8.8 2.1 .20 0 30 .10 4.2 5.5 - 4.0 13 8.8 2.1 .20 0 31 4.0 6.4 4.5 8.8 .20 0 TOTAL 0 3.30 MEAN 0 .11 .64 .068 MAX 0 .50 1,620 17 5.8 14 84 10 8.8 1.5 .50 MIN 0 0 .20 2.1 1.8 1.7 3.8 4.5 2.0 .20 0 AC-FT 0 6.6 5,140 279 205 257 1,050 406 260 39 4.2

HTR YR 1967 TOTAL 3.851.80 MEAN 10.6 MAX 1,620 MIN 0 AC-FT 7,640 SWEETKATER RIVER BASIN

11015000 SKEETKATER RIVER NEAR DESCANSO, CALIF.--CONTINUED COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SWEETWATER RIVER AND SWEETWATER RIVER DIVERSION, NEAR DESCANSO, CALIF., WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 JY JUN JUL AUG SEP

1 0 .20 .60 2.3 .1 1.5 1.1 1. .50 2 C .20 .40 2.3 .1 1.5 5.1 1. .40 3 0 .20 .40 2.3 .0 1.5 4.0 1. .40 4 0 .20 .40 2.3 .9 1.5 2.9 1. .30 5 0 .20 .40 2.2 .8 1.6 2.4 1. .30 6 C .20 .40 2.1 .7 1.7 2.2 1. .30 7 0 .20 .40 2.1 .7 1.8 2.1 1. .40 8 0 .20 .50 2.0 .8 3.6 1.9 1. .40 9 C .20 .60 2.0 .9 4.0 .8 1. .40 10 0 .20 .70 2.0 .9 3.6 .8 1. .30

11 .10 .20 .50 2.0 .8 3.1 .7 1. .30 12 .10 .20 .50 2.0 .8 2.8 .8 1. .20 13 .10 .20 .60 2.0 .1 2.8 .4 2. .20 14 .10 .20 .60 1.9 .0 3.0 .7 2. .20 15 .10 .20 .60 2.0 .8 3.0 .7 2. .20 16 0 .20 .80 2.0 .6 3.0 .7 1. .10 17 0 .20 1.4 2.0 .4 3.0 .8 1. .10 18 0 .20 2.9 2.0 .3 2.9 .8 1. .10 19 0 .50 19 2.0 .1 2.9 .8 1. .10 20 .10 .30 4.6 2.0 .0 ' 2.7 .8 1. .10

21 .10 .50 2.9 2.0 .1 2.5 .8 1. .10 22 .10 .80 2.5 2.0 .1 2.0 .7 1. .10 23 .10 .60 2.4 1.9 .0 1.6 .6 1. .10 24 .10 .40 2.5 1.8 .2 1.4 .5 1. .10 25 .10 .30 2.6 1.9 .4 1.4 .5 1. .10 26 .20 .70 2.6 2.0 .3 1.3 1.4 .90 .10 27 .20 .80 2.6 2.3 .4 1.2 1.4 0 .10 28 .20 .60 2.4 2.8 .6 1.1 1.4 .1 0 .10 29 .20 .50 2.4 2.6 .4 1.0 1.2 ro o 30 .20 .50 2.4 2.4 1.0 1.2 .60 0

0 0 MAX .20 .80 19 2.8 2.1 4.0 5.1 2.9 .50 0 0 MIN 0 .20 .40 1.8 1.0 .90 1.1 .60 0 0 0 0

CAL YR 1967 TOTAL 1 335 30 MEAN 3 66 MAX 84 MIN 0 AC FT 2 650

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SWEETWATER RIVER AND SWEETWATER RIVER DIVERSION, NEAR DESCANSO, CALIF., WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 AUG SEP

1 0 .25 .57 14 132 36 16 8.4 1.8 .82 .10 2 0 .24 .57 12 100 35 16 8.3 1.7 .59 .13 3 .05 .21 .57 10 80 40 16 8.2 1.6 .31 .15 8.0 1.4 .38 .15 5 0 .27 .56 13 61 34 19 7.8 1.4 .45 .16 6 .06 .24 .55 62 58 37 21 .6 1.3 .47 .17 7 .08 .24 .55 92 54 35 21 .4 1.2 .49 .16 8 .01 .24 .55 49 50 31 20 .3 1.1 .54 .13 9 0 .34 .59 42 54 29 18 .2 .98 .32 .10 10 0 .33 .54 35 79 29 17 .0 1.0 .31 .08 11 0 .40 .46 32 82 28 15 .0 .98 .33 .08 12 0 .35 . 2 31 81 26 14 .7 .83 .30 .11 13 0 .32 . 6 29 93 26 12 .4 .83 .30 .24 14 0 .31 . 27 82 24 11 .4 1.0 .28 .22 15 .09 .31 . 26 76 25 10 .6 1.2 .31 .30 16 0 .33 . 29 75 24 10 17 .09 .51 . 24 69 22 .08 18 .11 .40 . 28 66 21 .6 1.1 .24 .25 19 .11 .38 . 39 63 21 8 .3 .77 .24 .25 20 .09 .72 .40 58 20 6 .1 .57 .20 .25 21 .09 .66 . 39 64 19 5 .9 .82 .17 .13 22 .09 .56 . 43 74 20 4 .9 .95 .12 .16 23 .13 .51 . 74 58 18 3 .8 .89 .10 .28 24 .13 .43 2 385 51 18 2 .8 .89 .12 .24 25 .14 .50 38 698 48 18 1 .8 1.0 .12 .20 26 .14 1.8 16 607 46 17 9. 0 .6 .56 .11 .18 27 .12 1.0 11 178 46 16 8. 9 .4 .35 .10 .17 28 .19 .86 4 122 45 16 8. 8 .0 .64 .12 .16 29 .17 .74 32 42 17 8. 7 .8 .82 .12 .17 30 .19 .68 21 40 17 8. 7 .8 .85 .12 .17 .83 .11 8.94 5.19 EAN 0 .072 .49 27.0 99.6 65.6 25.3 12. 7 4 88 1.01 .29 .17 AX 0 .19 1.8 382 698 132 40 2 1 .4 1.8 .82 .30 IN 00 .21 .46 9.2 39 16 8.4 .8 .35 .10 .08 90 62 18 10 SWEETWATER RIVER BASIN

11015000 SWEETWATER RIVER NEAR DESCANSO, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SWEETWATER RIVER AND SWEETWATER RIVER DIVERSION,

' .01 2 .15 6 .91 .61 .69 26 .8 .35 .05 0 .01 3 .17 7 .89 .61 .69 12 .6 .35 .0 0 .01 4 .17 6 .64 .62 .70 % 5 .6 .37 .0 0 .01 .01

6 .11 I .62 .59 .64 6 .3 .34 .0 0 7 .16 9 .59 .59 .65 .3 .31 .0 0 6 .17 6 .62 .59 .70 .3 .33 .05 0 9 .21 6 1.0 .64 .70 \ .2 .35 .04 0 10 .30 1. .70 1.1 1.2 .2 .43 .04 ' 0

11 .12 6 .64 .90 1.2 .2 .41 .03 0 12 .43 9 .56 1.0 .94 .0 .32 .03 .06

4 .26 3 .56 .90 .75 .68 .26 .03 .03 5 .30 1 .58 .94 .75 .62 .31 .02 .04

6 .30 1 . .59 1.1 .75 .70 .29 .02 .03 7 .30 6 .62 1.4 .75 .66 .24 .02 .03 6 .49 7 .62 1.0 .75 .64 .19 .02 .02 9 .67 15 .61 .90 .75 .73 .16 .02 .03

1 .59 >1 .62 .77 .75 . .62 .15 .02 .02

3 .55 4 .66 .69 .74 .56 .09 .02 .01 4 .55 .1 3 .59 .9 .66 ; .56 .06 .02 .02

6 .55 .1 >6 .62 . 7 ..67 .57 .06 .02 .03 7 .55 4 .66 . 6 .67 .60 .06 .01 .02 8 .50 3 .66 . 0 7.6 .64 .06 .01 .02

.OB .003 AX .67 1 2 1.0 1.4 7.6 >6 .( 2.0 .43 .05 .14 .01 IN .11

11015500 SWEETWATER RIVER AT LOVELAND DAM, NEAR ALPINE, CALIF.

DRAINAGE AREA. --98. 1 sq mi. PERIOD OF RECORD. --October 1944 to September 1966 (discontinued). GAGE. --Nonrecording gage. Datum of gage is 1,215 ft above mean sea level. AVERAGE DISCHARGE. --22 years, 4.50 cfs (3,260 acre-ft per year); median of yearly mean discharges, 1. (900 acre-ft per year). REMARKS.--Records of discharge represent all water reaching Loveland Res , including precipitation on the id evapora- using a coefficient of 0.66, excepting the period October 1960 to June 1963'when the mass-transfer method i 'as used, and dated April 1946. Loveland Dam was completed in July 1945; storage began in March 1945. Capacity of reser­ voir at spillway level (gage height, 140.00 ft), 25,387 acre-ft. Dead storage, 125 acre-ft below lowest out- eight is ed. COOPERATION.--Records of stage, draft, and spill plus leakage furnished by California-American Water Co.

REVISIONS (WATER YEARS).--WSP 1091: 1945-46. WSP 1928: Drainage area. MONTHLY DISCHARGE, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

MONTH ELEVA- CONTENTS CHANGE DRAFT EVAPO- 5P ILL DISCHARGE TION (ACRE- IN (ACRE- RATION P LUS (ACRE­ (FEET)t FEET) AGE FEET) (ACRE- FEET) (AC »E- LAKE LOVELAND FEET) FE ET) ,259.91 1,980 -37 0 31 0 ,259.47 1,9*3 +438 0 13 0 45 ,264.20 2,381 +586 0 13 0 59 +1,601 0 271 0 1,67

,269.42 2,967 +616 0 19 0 63 ,274.10 3,563 +1,217 0 23 0 1,24 ,282.16 4,600 +663 0 40 0 70 APRI L ,266.08 5,463 -5,264 5,516 31 0 26 ,218.40 179 +184 0 7 0 19 ,228.37 363 +20 0 9 0 2 ,229.24 363 +8 0 10 0 1 ,229.54 391 -4 0 11 0 ,229.40 387 +5 0 9 0 1 -1,586 5,516 216 0 4,144

t ELEVATION ON FIRST DAY OF MONTH. NOTE. FOR MONTHS WHEN INFLOW TO THE LAKR WAS^SMALL AND OTHER C UANTITIES MERE LARGE, DISCORDANT FIGURES OF DIS- LARGER QUANTITIES, 'WHICH ARE NOT SUSCEPTIBLE TO MEASUREMENT WITH A PRECISION NECESSARY TO PRODUCE A FINAL ANSWER WITHIN DESIRABLE LIMITS OF ACCURACY. SWEETWATER RIVER BASIN

11016500 SWEETWATER RIVER AT SWEETWATER DAM, CALIF.

DRAINAGE AREA.--182 sq mi. PERIOD OF RECORD.--October 1887 to September 1966 (discontinued). GAGE.--Nonrecording gage. Datum of gage is 149.12 ft above mean sea level. REMARKS.--Records of total inflow represent all water reacning , including precipitation o reservoir and supplemental Colorado River water delivered through aqueduct of San Diego County Water Author ity. Total inflow computed on basis of records of storage, release (draft), spill, leakage, and evaporatio Records of net inflow exclude supplemental water from Colorado River. Monthly evaporation from reservoir s face computed on basis of evaporation from Colorado land pan using coefficient of 0.80. Area and capacity tables for reservoir are dated December 1947. Capacity of reservoir at spillway level (gage height, 89.70 ft), 27,690 acre-ft. Dead storage, 4 acre-ft below lowest outlet at gage height 19.7 ft, included in these records. Diversions for irrigation. Regulation at Loveland Reservoir (see station 11015500). Water released as required for irrigation and domestic use in Chula Vista, National City, and contiguous areas. COOPERATION.--Records furnished by California-American Water Co. REVISIONS (WATER YEARS).--WSP 811: 1928-32. WSP 1091: 1944-46. WSP 1928: Drainage area. MONTHLY NET INFLOW, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 MONTH GAGE NET HEIGHT (ACRE- IN (ACRE- SWEETWATER RESERVOIR FEET) FEET) (ACRE- FEET) 0 163 71 31 2,379 + 559 51 32 0 642 102 5 63 2', 938 +496 277 32 0 805 95 7 +960 1,490 1,017 0 3,467 1,811 1,6 3,434 -281 576 47 0 342 152 1 48 3,153 +13 390 39 0 442 90 3 53 3,166 -367 505 75 0 213 99 1 07 2,799 + 549 504 105 0 1,158 82 1,0 23 3,348 -494 621 98 0 225 184 29 2,854 -424 525 128 0 229 178 53 2,430 -39 79 143 0 183 145 36 2,391 -12 10 145 0 143 119 31 2,379 41 121 0 119 93 -336 3,918 1,082 0 4,664 1,410 3,25

t ELEVATION ON FIRST DAY OF MONTH. NOTE. FOR MONTHS WHEN INFLOW TO THE RESERVOIR WAS SMALL AND OTHER OUANTITIES WERE LARGE, DISCORDANT FIGURES OF NET INFLOW MAY APPEAR. THIS ARISES PRIMARILY FROM THE DIFFICULTY OF COMPUTING NET INFLOW AS THE RESIDUAL OF SEVERAL LARGER OUANTITIES, WHICH ARE NOT SUSCEPTIBLE TO MEASUREMENT WITH A PRECISION NECESSARY TO PRODUCE A FINAL ANSWER WITHIN DESIRABLE LIMITS OF ACCURACY. SAN DIEGO RIVER BASIN

11017000 BOULDER CREEK AT CUYAMACA RESERVOIR, NEAR JULIAN, CALIF. LOCATION.--Lat 32°S9'20", long 116°35'10 1J , \ sec.5, 1.14 S. , R.4 E., San Diego County, on outlet towe Cuyamaca Dam, 7 miles south of Julian. DRAINAGE AREA.--12.1 sq mi.

AVERAGE DISCHARGE.--28 year (1935-39, 1944-68), 4.10 cfs (2,970 cre-ft per year); median of yearly mean di charges, 1.5 cfs (1,100 cre-ft per year).

REMARKS.--Re

ity of reservoir at spillway level (gage height, 35.4 ft), 11,540 acre-ft. No dead storage. Small d: .dded purpo apit COOPERATION.--Records of reservoir operation furnished by Helix Irri District. REVISIONS (WATER YEARS).--WSP 1011: 1943. WSP 1928: Drainage area.

~MQNTHLY RUNOFF, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1968

MONTH GAGE CONTENTS CHANGE DRAFT EVAPO- SPILL DIS- HEIGHT (ACRE- IN (ACRE- RATION PLUS CHARGE (ACRE- CUYAMACA RESERVOIR FEET) FEET) 0 0 0 0 0 +667 0 0 0 667 +1,261 0 154 0 1,415

CAL YR 1965...... +1,897 1,100 309 0 3,306 JANUARY 1966...... 23.0 2,537 +609 0 79 0 688 FEBRUARY...... - 24.8 3,459 +922 0 167 0 1,089 MARCH ...... 25.2 3,685 +226 - 0 160 0 386 -1,757 1,615 0 44 -1,928 1,804 109 0 -15 JUNE...... - 0 0 0 0 0 0 AUGUST...... - 0 0 0 0 . 0 0 SEPTEMBER...... - 0 0 0 0 0 0 ...... 0 3,419- 855 0 4,274 OCTOBER.. NOVEMBER. DECEMBER. +2,447 Z.506 CAL YR 1966. 519 4,698

JANUARY 1967. 2,586 218 FEBRUARY..... 2,586 33 MARCH...... 2,684 194 APRIL...... 3,920 +1,236 1,373 MAY...... 2,270 -1,650 158 JUNE...... -2,270 -172 JULY...... AUGUST...... SEPTEMBER....

WTR YR 1967. OCTOBER.. NOVEMBER. DECEMBER. CAL YR 1967.

JANUARY 1968.. 154 FEBRUARY...... 163 MARCH...... 177 APRIL...... 447 MAY...... 588 JUNE...... 569 JULY...... 542 AUGUST...... 497 SEPTEMBER..... 471

WTR YR 1968. +471 195 666 t GAGE HEIGHT AT 0800 HOURS ON LAST DAY OF MONTH. NOTE. FOR MONTHS WHEN INFLOW TO THE RESERVOIR WAS SMALL AND OTHER OUANTITIES WERE LARGE, DISCORDANT FIGURES OF DISCHARGE MAY APPEAR. THIS ARISES PRIMARILY FROM THE DIFFICULTY OF COMPUTING DISCHARGE AS THE RESIDUAL OF SEVERAL LARGER OUANTITIES, WHICH ARE NOT SUSCEPTIBLE TO MEASUREMENT WITH A PRECISION NECESSARY TO PRODUCE A FINAL ANSWER WITHIN DESIRABLE LIMITS OF ACCURACY. SAN DIEGO RIVER BASIN

11020500 SAN DIEGO RIVER AT EL CAPITAN DAM, CALIF. LOCATION.--Lat 32°53'00", long 116°48 r 2S", in NE*5SEJsNE>5 sec.7, T. 15 S., R.2 E., San Diego County, on outlet towe of El Capitan Dam, 7 miles east of Lakeside. DRAINAGE AREA.--188 sq mi. PERIOD OF RECORD.--October 1945 to September 1966 (discontinued). October 1936 to September 1945 records not

GAGE.--Nonrecording gage. Datum of gage is 553.0 ft above mean s

(ARKS.-- Records of tot£ ling El Capitan I n£ c ^ ns ^ e cipi Lng1 doimWBSulder6 Creek 1 frome cuyama1 rsuprp?emen1 i uppl Colorado River water, October 1957 to June 1963 and sirice October 1964 evaporatioi surface computed by mass-trans rea and capac ity spillway level (gage t let at gage height 21.0 ft, indue tly by Cuyamaca Reservoir (see station 11017000). Water is released as reqt11 red for miinicipal use and n COOPERATION.--Records computed in cooperation with city of San Diego. REVISIONS (WATER YEARS).--WSP 1091: 1946. WSP 1715: 1958-59. WSP 1928: Drainage area

MONTHLY NET INFLOW, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 MONTH GAGE CONTENTS CHANGE DRAFT EVAPO- SPILL TOTAL COLORADO NET HEIGHT (ACRE- IN (ACRE- RATION PLUS INFLOW RIVER INFLOW (FEET)t FEET) CONTENTS FEET) (ACRE- LEAKAGE (ACRE- WATER (ACRE- (ACRE- FEET) (ACRE- FEET) INCLUDED FEET) FEET)

.... 97.73 15,873 +1,978 2 134 0 2,114 0 2,114

CAL YR 1965...... - - +9,180 645 2.357 0 12,182 2,697 9,485 2,177 2,177 FEBRUARY...... 4,724 2,109 2,615 MARCH...... 5,422 2,952 2,470 2,642 484 2,158 2,320 Al,680 640 37 37 JULY...... 103.92 18,984 -2,707 2 350 364 16,719 -250 6 339 WTR YR 1966...... - - +2,346 16,690 2,925 0 21,961 7,240 14,721

t GAGE HEIGHT AT 0800 HOURS ON LAST DAY OF MONTH. A RELEASE FROM CUYAMACA RESERVOIR. NOTE. FOR MONTHS WHEN INFLOW TO THE RESERVOIR WAS SMALL AND OTHER QUANTITIES WERE LARGE, DISCORDANT FIGURES OF INFLOW MAY APPEAR. THIS ARISES PRIMARILY FROM THE DIFFICULTY OF COMPUTING INFLOW AS THE RESIDUAL OF SEVERAL LARGER QUANTITIES, WHICH ARE NOT SUSCEPTIBLE TO MEASUREMENT WITH A PRECISION NECESSARY TO PRODUCE A FINAL ANSWER WITHIN DESIRABLE LIMITS DF ACCURACY. SAN DIEGO RIVER BASIN

11022500 SAN DIEGO RIVER NEAR SANTEE, CALIF. LOCATION.--Lat 32°49 T 29", long 117°03 1 17", in Ex Mission San Diego Grant, San Diego County, on right bank in

DRAINAGE AREA.--377 sq mi.

PERIOD OF RECORD.--May 1912 to December 1915, March 1916 to September 1970. Monthly discharge only for some periods and yearly estimates only for 1924-25, published in WSP 1315-B.

map). Pr 1920, to

AVERAGE DISCHARGE.--57 years, 23.1 cfs (16,740 e-ft pe ); median of yearly mean discharges, 4.8 (3,500 acre-ft per year).

econd,- gage height in feet) for the water ing table: iy Wtr yr Date Discharge G.H. Date Discharge 1966 Nov. 23, 1965 1,800 7.55 Long periods 0 1967 Dec. 6, 1966 3,400 9.30 do. 0 1968 Dec. 18, 1967 626 5.24 do. 0 1969 Feb. 25, 1969 1,830 7.59 Oct. 1-8, 1968 0 1970 Mar. 5, 1970 626 5.24 Several days .01 Period of scharge, 45,40( , 16, 1927 (gage height, 18.1 ft, from f loodmark) ; no flow at times in most years, A discharg e of 70,200 cfs occiirred Jan. 27, 1916 (gajje height, 25.1 ft, site and datum then in use), based eyance computation. RE MARKS. --Record

REVISIONS (WATER YEARS).--WSP 1565: 1955-56. WSP 1635: 1922, 1926(M), 1927. WSP 1928: Drainage area. DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY

1 0 1 57 12 7. 2.9 .70 2 0 .4 3B 8.0 9. 2.7 .60 3 0 .5 31 6.4 8. 3.5 .60 4 G .9 26 6.3 6. 3.2 .60 5 0 .7 20 5.5 5. 2.2 .60 6 0 .5 17 101 5.7 2.2 .80 J 0 .9 16 96 6.6 2.8 .90 a 0 .1 14 57 5.9 2.5 1.0 9 0 37 12 26 6.4 2.3 1.1 10 0 39 11 25 5.9 2.3 1.1 11 0 190 11 31 5.5 2.2 .70 12 0 90 10 18 5.2 2.3 .90 13 0 158 8.6 17 5.0 2.0 .80 l*> 0 356 8.4 15 5.4 1.7 .80 15 0 227 7.3 13 4.0 1.3 .90 16 2* 357 6.9 12 3.8 1.2 1.3 17 78 163 8.4 11 4.6 1.6 1.1 IB 27 84 6.8 11 .6 2.0 1.1 19 10 57 6.4 9.7 .2 1.4 .80 20 4.3 45 16 8.9 .1 .70 .70 21 2.8 35 7.6 9.0 .9 1.1 .50 .50 22 130 70 5.9 8.3 .1 .90 .30 .30 23 872 40 5.8 T.8 4.6 .80 .60 .20 2* 1*7 30 5.5 7.4 3.5 1.2 .80 .10 25 110 25 $.8 7.4 $.0 1.1 .70 26 57 19 5.5 8.2 3.9 .50 .60 27 36 16 14 8.3 4.1 .70 .90 28 27 15 9.4 7.4 4.4 .80 .50 29 20 30 5.0 4.2 .70 .20 30 16 113 31 __-. » 4.5 .60 .10 31 _____ 39 44 _____ 3.5 _____ .50 TOTAL 0 1,561.1 2,988.0 471.3 553.6 160.7 51.60 22.80 MEAN 0 52.0 96.4 15.2 19.8 5.18 1.72 .74 MAX 0 872 392 57 101 9.4 3.5 1.3 KIN 0 0 5.9 5.0 5.5 3.5 .50 .10

C»l YR 1965 TOTAL 5,393. 00 MEAN 14.8 MAX 672 KIN 0 AC-FT 10,700 ,530 SAN DIEGO RIVER BASIN

11022500 SAN DIEGO RIVER NEAR SANTEE, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 DAY OCT NOV DEC JUN JUL 1 0 2.1 8.1 10 3.7 17 4.4 .80 2 0 .40 7.3 9.5 3.7 11 4.1 .90 3 0 .30 .80 4 0 21 6.2 7.9 4.4 5.8 3.3 l.D 5 0 383 1.2 6 0 1 ,040 6.1 4.7 4.6 6.2 3.2 1.2 T 0 554 8 22 122 2.9 1.3 9 2.7 53 5.4 5.1 3.9 4.6 2.8 1.0 10 .80 35 11 .50 25 5.1 5.4 3.6 56 2.6 .80 12 .50 19 5.0 5.5 3.7 54 2.6 1.0 13 .70 15 5.0 5.8 3.9 13 2.4 .80 14 1.1 13 5.0 5.7 20 7.5 2.2 1.2 15 1.1 12 5.3 5.9 7.0 6.5 2.1 1.6 16 1.1 10 17 18 19 1.0 .9 3.9 4.B 5.0 21 2.1 l.B 20 1.1 .5 1.9 1.6 21 1.2 .7 2.5 4.9 5.0 8.2 1.5 1.0 22 1.4 .4 19 4.5 5.0 72 1.4 1.3 23 2.9 .9 200 4.3 4.9 13 1.0 1.0 24 3.6 .4 18 4.4 4.8 8.9 1.3 .90 25 3.0 .1 .60 26 2.7 .1 24 4.4 4.6 .1 .60 .40 27 2.3 .1 16 4.5 4.6 .5 .40 .30 28 3.1 .1 13 4.4 4.2 .2 .30 .20 29 3.7 .1 13 ««__ 5.4 .4 .80 .20 30 2.9 .1 11 5.1 .3 .80 .10 31 .3 .80 TOTAL 0 61.50 2 ,407.00 568.4 157.9 162.0 411.5 65.00 29.50 0 MEAN 0 2.05 77.6 18.3 5.64 5.23 13.7 2.10 .98 0 MAX 0 22 1,040 200 10 20 72 4.4 1.8 0 MIN 0 0 .30 2.5 4.3 3.6 4.3 .30 .10 0 AC-FT 0 122 4,770 1,130 313 321 816 129 59 0

MTR YR 1967 TOTAL 3,862.80 MEAN 10.6 MAX 1,040 MIN 0 AC-FT 7,660

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY DCT NOV DEC JAN FEB MAR APR MAY JUN JUL 1 D 4.5 2.4 .0 1.9 .34 .67 .47 .03 2 0 2.6 3.0 .0 1.6 35 .59 .34 .03 3 0 2.2 2.3 .1 1.8 6.0 .65 .39 .03 4 0 2.1 1.7 .03 5 0 1.8 1.5 .1 1.9 2.7 .49 .32 .03 6 0 1.6 1.2 .8 1.7 2.2 .55 .18 .03 7 .01 1.5 1.0 .5 1.5 1.8 .73 .17 .03 8 .01 1.6 1.4 .2 45 1.7 .61 .16 .03 9 .01 l.B 1.5 .0 12 1.3 .64 .15 .03 10 .01 1.5 1.6 . 1 5.0 .53 1.1 .15 .03 11 .01 1.4 2.8 .1 4.3 .54 1.0 .14 .03 12 .01 1.4 2.7 .6 3.6 .70 .93 .13 .02 13 .01 1.3 2.1 .8 3.1 .71 2.0 .11 .02 14 .01 1.3 1.6 .1 3.7 .75 1.6 .11 .02 15 .01 1.3 1.5 .8 3.0 .82 1.4 .09 .01 16 .01 1.6 1.5 .7 2.3 .70 1.2 .09 0 17 .01 7.0 1.4 .2 2.3 1.0 1.1 .09 0 18 .01 62 1.4 .9 2.3 .89 1.1 .09 0 19 .01 159 1.4 .6 2.3 .95 l.l .07 0 20 10 3B 1.3 .9 2.5 .93 1.3 .07 0 21 27 12 1.1 .4 1.8 .96 1.2 .07 0 22 63 7. 1.0 .7 1.7 .69 .96 .06 0 23 IB 5. .75 .6 1.7 .74 .68 .06 0 24 5.6 4. .76 .6 1.3 .77 .78 .06 0 25 3.9 4. 1.1 .5 .98 .61 .81 .05 0 26 24 4. 1.3 .3 .77 .63 .49 .05 0 27 30 3. 2.3 .4 1.2 .64 .46 .05 0 2B 5.0 3. IB .6 1.1 .67 .66 .04 0 29 3.9 3. 4.7 ,5 .96 .78 .58 .04 0 30 3.2 3. 2.7 .34 .78 .53 .03 0 31 -" - 2. 2.1 "~ .26 .39 D 70.25 2T.11 4.41 .40 MEAN 6.46 11. 2.29 2 74 3.74 2.34 .67 .15 .013 MAX 63 159 18 .6 45 35 2.0 .56 .03 MIN D 1.3 .75 .0 .26 .34 .39 .03 0 AC-FT 364 696 141 157 230 139 54 a.B .6 CAL YR 1967 TOTAL 1,936. 93 MEAN 850 HTR YR 1968 TOTAL 913. 24 MEAN 2.50 MAX 159 MIN D AC-FT 1, 810 SAN DIEGO RIVER BASIN

11022500 SAN DIEGO RIVER NEAR SANTEE, CALIF.--CONTINUED DISCHARGE

DAY OCT NOV DEC JAN FE8 MAR APR HAY JUN JUL AU6 SEP

1 0 .99 1.2 3. 27 101 6.6 .8 1.7 1.7 .12 .01 2 0 .80 1.4 3. 21 57 6.7 .1 1.7 1.1 .10 .01 3 0 .86 1.5 3. 17 44 7.8 .1 1.5 .72 .07 .01 4 0 .88 1.2 3. 13 37 7.1 .1 .94 .50 .06 .02 5 0 1.1 1.4 2. 11 29 6.1 .6 .81 .63 .12 .02 6 0 1.1 1.3 3. 261 24 12 5.1 .73 1.1 .08 .02 7 0 .81 1.4 2. 125 21 7.4 5.2 .94 1.1 .05 .02 8 0 .91 1.3 2. 51 16 .02 9 .01 .85 1.6 2. 36 IB .02 10 .58 .71 1.5 2. 33 76 6.6 3.0 2.5 .36 .02 .02 11 .76 .75 1.4 2. 27 40 6.6 3.4 2.5 .27 .02 .02 12 .74 .80 1.9 1. 25 18 6.9 3.9 2.2 .21 .10 .02 13 .74 .67 2.8 1. 24 75 B.I 3.2 1.7 .12 .28 .02 14 .84 1.1 2.0 235 19 34 B.6 2.6 1.5 .18 .36 .02 15 1.2 1.2 1.8 66 13 16 7.5 2.1 2.1 .50 .50 .02

16 2.2 12 2.1 21 18 13 .02 17 1.6 4.3 2.4 15 16 12 3.2 1.8 2.5 .12 .08 .02 IB 1.3 2.6 2.3 13 60 10 3.9 2.3 2.0 .09 ..04 .02 19 1.2 2.0 2.9 20 182 11 4.2 2.5 1.4 .06 .33 .02 20 1.1 1.7 3.3 21 291 9.9 4.7 2.0 1.3 .06 .25 .02 21 1.3 1.7 3.4 98 76 25 5.0 1.6 1.2 .04 .16 .02 22 1.2 1.7 2.7 29 577 78 4.6 2.0 1.6 .03 .04 .02 23 .97 1.4 2.8 14 174 20 3.7 2.1 2.3 .02 .03 .47 24 .75 1.5 2.7 50 313 IS 3.8 2.2 2.1 .02 .02 .40 25 .66 1.5 2.8 517 490 8.6 4.1 .1.9 1.6 .02 .02 .11

26 .56 1.3 23 447 622 7.0 4.1 2.0 1.3 .27 .02 .08 27 .86 1.5 7.7 332 166 4.5 3.9 1.9 1.3 .29 .01 .10 28 .88 1.1 3.3 106 102 6.9 3.6 1.6 .96 .52'.44 .01 .30 29 .85 1.1 2.9 96 6.3 3.2 1.0 1.1 .01 .81 30 .91 1.0 2.7 56 »«. 6.1 2.6 1.2 l.S .21 .01 1.0 31 .97 2.7 40 . 7.0 1.7 .14 .01 12.81 3.40 3.68 MEAN .72 1.66 3.01 71.3 135 27.3 5.59 2.66 1.63 .41 .11 .12 MAX 2.2 12 23 517 622 101 12 5.2 2.5 1.7 .50 1.0 HIM 0 .67 1.2 l.f 11 4.5 2.6 1.0 .73 .02 .01 .01 AC -FT 44 99 185 4t380 7,520 1,680 333 164 97 25 6.7 7.3

DISCHARGE . IN CUBIC FEET PER SECOND , MATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 JUN "" DAY OCT NOV tJUI. AU6 SEP

1 .84 .12 4.1 2.7 .91 212 2.6 2.3 1.1 .72 .04 .01 2 .82 .12 4.7 2.5 .83 157 2.4 2.0 1.1 .63 .03 .01 3 .68 .21 3.5 -2.6 .72 20 2.4 2.1 1.5 .63 .03 .10 4 .47 .40 3.0 2.4 .93 11 2.4 2.3 1.8 .57 .02 .09 5 .12 .71 2.5 2.2 .1.5 183 2.3 2.3 1.6 .52 .11 .09 6 .08 .78 2.2 2.0 1.1 26 2.8 2.4 1.5 .49 .14 .03 7 .06 9.9 2.2 1.9 1.1 23 2.5 2.0 1.5 .46 .27 .07 8 .17 15" 1.8 .42 .35 .07 9 .36 2.5 5.0 2.1 1.1 2.8 1.3 1.6 .40 .06 .11 10 .47 7.0 3.0 2.7 6.6 26 2.9 1.9 1.1 .36 .03 .09 11 .39 4.0 2.3 3.8 21 16 3.1 1.8 .92 .33 .03 .07 12 .19 2.8 2.1 4.0 4.5 12 3.2 l.S .70 .27 .03 .11 13 .35 .51 .23 .03 .05 14 .62 .92 .20 .03 .03 15 .40 2.4 2.3 3.6 1.9 7.3 2.7 .96 .77 .17 .03 .08 16 .35 5.9 2.1 4.1 1.8 6.8 2.4 .61 .68 .69 .02 .16 17 .47 3.4 1.7 IS 1.7 6.5 2.5 .73 .74 .50 .02 .29 18 .45 2.5 1.7 5.2 1.5 6.1 2.4 .69 .81 .46 .02 .35 19 2.4 .64 .92 .16 .02 .51 20 .31 2.0 1.7 4.6 1.1 5.S 2.5 .86 1.1 .06 .02 .51 21 2.2 1.1 .67 22 .48 1.7 2.1 3.S 1.2 3.7 2.5 1.2 .93 .03 .02 .69 23 .39 .03 .02 .65 24 .35 25 .32 1.3 1.9 2.3 1.5 5.1 2.2 .84 1.4 .02 .01 1.0 26 .11 1.2 2.4 1.9 1.7 4.4 2.0 .70 1.4 .02 .02 .40 27 .31 1.1 1.3 .02 .01 .15 28 .77 1.1 3.4 1.6 18 3.4 3.1 .77 1.0 .02 .01 .08 29 .57 .96 3.1 1.4 3.4 2.8 .63 .91 .02 .01 .19 30 .30 1.0 3.0 1.2 .... 3.0 2.5 .84 .79 .02 .01 .06 31 .14 2.8 .93 2.9 -84 .04 .01

TOTAL 12.13 69.70 80.2 100.43 83.69 821.2 77.4 40.37 34.08 8.56 1.48 - 7.82 MEAN .39 2.32 2.59 3.24 2.99 26.5 2.58 1.30 1.14 .28 .048 .26 MAX .84 9.9 5.0 15 21 212 3.2 2.4 1.8 .72 .35 1.1 HIN .06 .12 1.7 .93 .72 2.9 2.0 .63 .51 .02 .fll .01 AC-FT 24 138 159 199 166 1,630 154 BO 68 17 2.9 16 LOS PENASQUITOS CREEK BASIN

11023340 LOS PENASQUITOS CREEK NEAR POWAY, CALIF. LOCATION.--Lat 32°56'35", long 117°07'15", in Los Penasquitos Grant, San Diego County, on left bank 1.0 mile downstream from Cypress Creek and 5.5 miles southwest of Poway. DRAINAGE AREA.--42.1 sq mi. PERIOD OF RECORD.--October 1964 to September 1970. GAGE.--Water-stage recorder. . Altitude of gage is 260 ft (from topographic map). AVERAGE DISCHARGE.--6 years, 4.35 cfs (3,150 acre-ft per year). EXTREMES. --Max imums md minimiins (dis charge in cubic feet p r second , gage height in f jet). Annual m iximua di. charge (*) and peak dis charge > above b ase (60 cfs), v»ater years 1966 70 Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 23 1965 0500 1,610 7.40 Jan. 23, 1967 0500 64 2.24 Feb. 6, 1969 1700 291 a3.78 Dec. 9 1965 1000 676 4.62 Jan. 25, 1967 - 271 3.27 Feb. 19, 1969 2300 138 3.02 Dec. 14 1965 1700 523 4.11 Apr. 11, 1967 1630 75 2.36 Feb. 22, 1969 0600 291 3.78 Dec. 30 1965 0030 202 2.94 Feb. 25, 1969 2030 963 a5.97 Feb. 6 1966 1515 101 2.59 Mar. 8, 1968 1215 *256 3.22 Feb. 28, 1970 2045 *260 3.64 Dec. 6, 1966 2000 *2,100 a6.90 Jan. 25, 1969 1415 632 b5.04 Mar. 5, 1970 0600 112 2.80 a In gage well, 7.70 ft from profile of floodmarks. b From outside gage. ininmm daily discharge, water years 1966-70 Wtr yr Date Discharge Wtr yr Date Discharge 1966 Dec. 8, 1965 .20 1969 Aug. 8, 1969 .48 1967 Aug. 7, 1967 .13 1970 Apr. 15, 1970 .28 1968 May 16, 17, 1968 Period of record: Maximum discharge, 2,100 cfs Dec. 6, 1966 (gage height, 6.90 ft, in gage well, 7.70 ft, from profile of floodmarks), from rating curve extended above 400 cfs on basis of slope-area measurement at gage height 6.23 ft, in gage well (7.40 ft, from outside gage); no flow May 16, 17, 1968. REMARKS.--Records good. Flo partly regulated by several conservation reser station. Pumping from igation. Flow augmented by reclaimed water fro way are

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

NOV DEC JAN FEB MAR APR MAY JUN JUL 1 .40 .50 2.5 5 4.0 .8 .90 .50 .60 .60 2 .50 .50 1.5 3 2.6 .9 .90 .50 .60 .50 3 .50 .50 1.0 2 2.0 .3 .80 .50 .60 .40 4 .50 .50 .70 2 1.6 .7 .90 .50 .50 .40 5 .60 .50 .50 2 1.6 .6 .80 .50 .60 .40 6 .50 .40 .40 1 36 .9 .90 .50 .60 .50 7 .60 .40 .30 1 25 .8 .80 .50 .50 .50 8 .70 .30 .20 1 35 .7 .80 .80 .60 .50 9 .70 .40 285 8 12 .2 .80 .60 .60 .60 10 .80 .30 243 .6 16 .2 .90 .70 .50 .50 11 .70 .30 62 .8 19 .2 .90 .60 .50 .40 12 .70 .30 40 11 .4 .80 .60 .60 .40 13 .60 .30 77 8.6 .4 .80 .60 .50 .50 14 .60 .40 201 6.7 .4 .80 .70 .50 .50 15 .60 1.5 79 5.5 .4 .70 .60 .60 .40 16 .50 3.4 169 4.6 .3 .70 .60 .60 .50 17 .60 2.2 63 4.2 .3 .70 .50 .60 .40 18 .50 5.0 40 3.7 .5 .60 .50 .50 .40 19 .50 2.4 29 3.5 .1 60 .60 .60 .40 20 .50 .80 23 3.1 .7 .60 .50 .60 .50 21 .40 .40 18 3.0 .8 .50 .60 .60 .50 22 .40 44 32 2.8 .7 .50 .40 .60 .40 23 .40 4 17 23 2.7 .7 .90 .50 .40 .50 .50 24 .40 49 16 2.7 .3 .90 .50 .40 .50 .50 25 .40 49 14 3.5 .8 1.0 .50 .40 .50 .50 26 .40 30 13 4.1 .8 .90 .60 .50 .60 .40 27 .40 17 11 3.4 .7 .90 .60 .50 .50 .40 28 .40 11 11 2.7 .8 .90 .50 .50 .50 .50 29 .40 6.8 30 .»»_ .6 .90 .50 .70 .70 .50 30 .40 4.3 72 12 . .6 .80 .40 .80 .70 .60 31 .40 42 15 .5 .60 ___ .70 .50

MEAN .52 21.6 51.6 9. 3 8.24 2 29 1.13 .69 .55 .57 .47 MAX .80 417 285 f 36 .9 1.5 .90 .80 .70 .60 MIN .40 .30 .20 1 1.6 .5 .80 .40 .40 .50 .40 AC-F7 32 1,290 3.170 6 ) 457 41 67 42 33 35 29 CAL YR 1965 TOTAL 2.512. 10 MEAN 6.88 MAX 417 MIN .10 AC-FT 4,980 HTR YR 1966 TOTAL 2,991.70 MEAN 8.20 MAX 417 MIN .20 AC-FT 5.930 LOS PENASQUITOS CREEK BASIN

11023340 LOS PENASQUITOS CREEK NEAR POWAY, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

DAY OCT MAY JUN JUL AUb itr

1 .50 .28 .60 .9 12 1.9 1.7 2.7 .4 .75 .76 .65 2 .60 .26 .50 .4 10 1.9 2.7 2.5 .6 .73 .90 .81 3 .60 .25 10 .2 1.9 2.7 3.1 .8 .75 1.2 .63 4 .60 .30 13 .2 8. 1.9 2.3 3.0 .1 .66 1.3 .46 5 .50 .40 392 .1 6. 1.8 4.6 2.9 .1 .61 1.2 .47 6 .60 .40 728 .1 5- 1.8 2.7 2.8 .2 .66 .43 .51 7 .60 7.3 159 .0 4! 1.8 2.3 2.8 .2 .67 .13 .37 8 .50 15 38 .0 4.: 1.8 1.8 2.6 .97 .63 .82 .22 9 .60 2.8 27 .0 1.8 2.1 2.6 .SB .99 .86 .42 10 1.5 .80 21 .0 3. 2.1 2.2 2.5 .84 1.1 .98 .41

11 .90 .50 14 1.0 3. 1. 25 2.5 .93 .70 .80 .26 12 .90 .50 10 .96 3. 1. 27 2.3 .97 .35 .84 .51 13 .90 .50 8.3 .94 3. 2. 7.2 2.3 1.1 .41 .88 .55 14 .60 .50 .8 .92 2. 18 3.6 2.2 1.1 .47 .89 .50 15 .60 .50 .5 .90 2. 6. 2.9 2.1 1.0 .57 1.4 .60 2.0 2.0 1.1 .83 1.5 .45 16 .40 .50 .88 2. 1. 2.-0 17 2.8 .50 .87 2. 1. 2.0 .88 .67 .83 .37 18 2.0 .50 t .86 2. 1. 3.4 1.8 .94 .60 .31 .64 19 1.7 .50 f .83 2. 1. 12 1.8 .SB .48 .33 .44 20 1.5 .50 . i .BO 2. 1. 12 1.7 1.0 .57 1.3 .4B 21 1.2 .50 2.1 2. 1. 3.3 1.7 .74 .63 .4 .27 22 1.0 .50 ^ 5.6 2. 1. 5.4 1.5 .85 .53 .6 .44 23 .90 .50 ^ 30 2. 1. 3.9 1.5 .81 .47 .3 .34 24 .80 .50 14 2 . 1. 2.8 1.4 .79 .61 .1 .41 25 .70 -.50 150 2. 1. 2.9 1.4 .94 .68 .58 .49 26 .60 .50 80 2 . 1. 2.9 1.3 .86 .75 .1 .61 27 .50 .50 ^ 50 2 B 1. 2.6 1.3 .97 .84 .3 .69 2B .40 .50 ^ 30 I. 1 1. 2.8 1.2 1.1 .64 .4 .64 29 .35 .50 . 20 1. 3.0 2.9 l.C .67 .3 .63 30 .30 .50 15 ""»__ 1. 2.8 3.2 .78 .93 .58 .63 31 .29 14 3. 1.9 .60 .46

MEAN .64 1.26 8.0 14.0 3.96 2.3 5.15 2.18 1.03 .67 .96 .50 MAX 2.8 15 728 150 12 1 27 3.2 1.8 1.1 1.6 .85 MIN .29 .25 .50 .80 1.9 1. 1.7 1.2 .74 .35 .13 .22 AC-FT 51 75 2,950 860 220 14 307 134 61 41 59 30 MIN .25 AC-FT 4,520

NOTE. NO GAGE-HEIGHT RECORD JAN. 25 TO MAR. 9.

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 196B

DAY OCT NOV DEC JUN JUL AUG 1 .63 .70 1. .88 1.1 .6 3.6 1.1 .90 .BO .70 2 .63 .85 1. .68 .1 .4 32 1.1 .90 .80 .70 3 .63 .88 1. .88 .4 .9 5. 1.1 .90 .80 .70 4 .63 .88 1. a .6 .5 1. 1.1 .90 .80 .70 5 .63 .87 1. .7 .3 1. .80 .90 .BO .BO 6 .63 .88 1. # .4 .4 1. 2.3 .' 0 .90 .70 7 .63 . 0 1. f .2 .1 1. 4.2 .90 .70 8 .63 , 1. f .2 5 . 9 4.0 ^ .90 .70 9 .63 . 1. . .2 2 1. 3.6 ^ .9 .70 10 .63 1. .3 .0 . 7 2.8 . .8 .60 11 .63 1. ^ .3 .6 . 1 .70 ^ .B .70 12 .63 . 1. . .3 .8 1. .60 ^ .8 .70 13 .63 . 1. . .1 .7 1. .20 9 .8 .BO 14 .63 , 1. t .8 .6 .10 B g .70 15 .63 1. .B .5 I 7 .10 . .8 .60 16 .63 f 1. . .5 .5 . 7 0 .70 .70 17 .63 . 1. ^ .4 .5 . 8 0 B .70 .80 18 .63 . 12 . .5 .8 .10 f .70 .60 19 .63 , 20 a .5 .4 I 7 .20 t .70 .60 20 .63 10 .7 .3 . 7 .20 .< .60 .70 21 .63 f 3> .8 .2 1.1 .20 .70 .60 22 .63 . 1. , .8 .3 .99 .30 f .70 .80 23 .63 . 1. . .8 .3 .79 .90 ^ .80 .60 24 .63 # 1. ^ .3 .3 .79 .90 .60 .60 25 .63 1. .85 .4 .79 .90 1. .70 .60 26 .66 1.0 . .80 .3 .90 .90 .90 .70 .60 27 .70 . .90 m .SB .3 .67 .90 .90 .80 .60 28 .70 . .B8 . .B .1 .90 .90 .90 .90 .60 29 .71 m .88 a .5 .1 .90 .90 .90 .90 .60 30 .71 . .68 . . .2 1.0 .90 .90 .90 .60 31 .70 .88 .2 .90 .80 .60 119.6 68. B6 32.90 24.40 20.70 MEAN .64 1.27 2.43 1. 3 1.57 3.86 2.30 1.06 .96 .79 .67 MAX .71 4.0 20 2 5 4.8 52 32 4.2 1.0 .90 .80 WIN .63 .70 .88 . 8 .80 1.1 .79 0 .90 .60 .60 AC-FT 40 75 149 6 91 237 137 65 57 4B 41

WTR YR 1968 TOTAL 535. 22 MEAN 1.46 MAX 52 MIN 0 AC-FT 1,060

NOTE. NO GAGE-HEIGHT RECORD NOV. 7 TO JAN. 4. LOS PENASQUITOS CREEK BASIN

11023340 LOS PENASQUITOS CREEK NEAR POWAY, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

.70 .64 1.1 .71 5.8 33 4.4 2.8 1.2 1 .1 . .70 .69 1.1 .80 4.4 22 4.3 2.8 1.3 .99 . .70 .82 1.2 .75 2.4 19 5.4 2.8 1.2 .95 . .70 .81 .81 .62 i.e 16 4.8 3.4 1.2 .93 . .72 .74 .88 .78 1.6 12 4.4 3.5 1.2 .71 .76 .71 .94 .86 88 11 5.5 2.8 1.2 .55 . .81 .70 1.2 .84 33 9.4 4.4 3.0 1.2 .49 .75 .76 .80 .80 14 8.6 4.2 2.4 1.2 .48 .6.9 .71 .88 .75 .68 4.8 2.0 1.2 .58 .70 .75 .79 .75 5.3 13 5.1 1.7 1.4 .57 . .71 .66 21 5.2 1.6 1.6 .71 ". .82 .79 .70 17 3.5 15 4.6 1.5 1.5 .66 .72

.65 .81 .62 .91 .70 1.6 2.6 6.9 4.0 1.4 1.4 8 .92 . .64 .92 .80 1.6 8.3 6.1 4.0 1.5 1.3 9 .1 . .70 .96 .73 1.6 29 5.5 4.1 1.4 1.3 1. .1 . .76 .89 .95 1.7 37 5.7 3.9 1.4 1.3 1. .1

.75 .83 .70 14 17 14 4.0 1.4 1.3 .0 . .70 .92 .73 5.7 119 17 3.8 1.4 1.3 .0 .67 .91 .77 2.1 34 7.5 4.0 1.4 1.3 .2 . .67 .99 .81 6.5 179 6.0 3.8 1.4 1.3 .1 .71 1.0 1.3 196 312 5.0 3.7 1.3 1.3 .2

.75 .92 1.9 105 175 4.4 3.4 1.4 1.2 9 .2 . .80 .96 .90 89 51 4.2 3.1 1.3 1.2 .2 . .76 .94 .8! 37 35 4.1 2.8 1.3 1.2 .3 .72 .95 .90 36 4.0 2.7 1.2 1.1 .3 '. .83 1.1 .87 15 4.2 2.6 1.2 1.2 .3 31 .75 .73 7.7 4.5 .4

TOTAL MEAN .72 .86 .90 17.9 42.5 10.6 4.16 1.85 1.3D 1. 14 .93 1 2 MAX .83 1.1 1.9 196 312 33 5.5 3.5 1.8 1 .3 1.4 . MIN .62 .64 .70 .62 1.6 4.0 2.6 1.2 1.1 98 .48 AC-FT 44 51 56 1.100 2.360

TOTAL 476.23 MEAN 1.31 MAX 52 HIN 0

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER' 1969 TO SEPTEMBER 1970

.1 1.1 1.4 51 2.0 1.5 1.7 .2 1.2 1.3 .2 1.1 1.3 53 2.0 1.5 1.6 .2 1.2 1.3 .2 1.2 1.3 5.2 2.0 1.4 1.5 .2 1.2 1.3 .2 1.2 1.3 SO 1.9 1.4 1.6 .2 1.1 1.3 .3 1.2 1.3 16 1.8 1.4 1.6 .3 1.1 1.3 .9 1.2 1.3 13 1.8 1.4 1.6 .2 1.1 1.3 .5 1.2 1.3 10 1.8 1.4 1.7 .2 1.1 1.5 .3 1.2 1.3 7.1 1.8 1.4 1.6 .2 1.1 1.4 .9 1.7 3.7 5.7 1.8 1.4 1.5 .3 1.1 1.3

.4 1.5 11 4.9 1.8 1.3 1.3 .3 1.2 1.3 .2 1.4 1.7 1.9 .53 1.2 1.3 .3 1.1 1.3 .2 1.4 1.5* .85 .30 1.2 1.3 .3 1.1 1.4 .4 1.7 1.5 .66 .28 1.2 1.3 .2 1.1 1.3 .7 2.1 1.5 .57 .3 1.2 1.3 .2 1.1 1.3 .4 .2 1.7 1.4 .55 .5 1.2 1.3 .2 1.2 1.3 .2 1.6 1.4 .56 .5 1.2 1.3 .2 1.2 1.3 .2 1.6 1.3 .77 .5 1.2 1.3 .3 1.2 1.3

.2 1.6 1.4 .86 .5 1.2 1.3 .3 1.2 1.4 .2 1.7 1.4 .93 .4 1.1 1.2 .2 1.2 1.3 .3 1.7 1.4 .98 .6 1.3 1.2 .2 1.2 1.2 .4 1.6 1.5 .3 .9 1.2 1.2 .2 1.3 1.3 .3 1.6 1.5 .7 .3 1.3 1.2 .2 1.3 1.3 .3 1.6 1.5 .7 .3 1.3 1.2 .2 1.3 1.3 .3 1.5 1.5 .8 .3 1.4 1.2 .2 1.3 1.3 .3 1.4 37 .6 .5 1.4 1.2 .2 1.3 1.3 .3 1.4 .7 .3 1.3 1.2 .2 1.4 1.3 .3 1.4 .7 .6 1.3 1.2 .2 1.3 1.3 31 1.3 .8 1.4 .2 1.4

TOTAL 1.9 3 46.9 87.8 250.61 61.51 40.5 40.9 3 .0 37.1 39.3 MEAN .40 1 i 1.51 3.14 8.08 2.05 1.31 1.36 1 23 1.20 1.31 MAX 3.9 3.4 37 S3 6.9 1.5 1.7 .3 1.4 1.5 HIN 1.1 1.1 1.3 .48 .28 1.1 1.2 .2 1.1 1.2 AC-FT 83 r 93 174 497 122 80 81 75 74 78

AC-FT 4,980 MTR YR 1970 TOTAL 756.05 MEAN 2.07 MAX 53 MIN .28 AC-FT 1,500 46 SAN DIEGUITO RIVER BASIN 11024000 SANTA YSABEL CREEK AT SUTHERLAND DAM, CALIF. LOCATION.--Lat 33°07'06", long 116°47'11", in SlftSVWWs sec.21, T.12 S. , R.2 E., San Diego County, Sutherland Dam, 1.6 miles upstream from Black Canyon Creek and 7 miles northeast of Ramona. DRAINAGE AREA.--53.9 sq mi. 1970 (discontinued). Prior to October 1953, published as "near Mesa Grande." See WSP 1928 for history of changes pr-ior to Nov. 30, 1954. AVERAGE DISCHARGE. -- 49 years (1913-28, 1936-70), 16.9 cfs (12,230 acre-ft per year) ; median of yearly mean dis- charges, 6.6 cfs (4,800 acre-ft per year). 1 ing

(gage height, 145 .00 ft), 29,680 acre-ft. Dead stora ge, 176 a cre-ft below lowest outlet at gage height 28.00 ft, include eased a. required f COOPERATION. --Records furnished by city of San Diego. REVISIONS. --WSP 1928 : Drainage area. MONTHLY DISCHARGE, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1970 MONTH GAGE CONTENTS CHANGE DRAFT EVAPO­ SPILL DIS­ HEIGHT (ACRE- IN (ACRE- RATION PLUS CHARGE (ACRE- FEET) (ACRE- FEET) SUTHERLAND RESERVOIR FEET) FEET) ...... 69.23 3,266 -65 0 80 0 15 NOVEMBER...... 75.15 4,264 +998 0 34 0 1,032 DECEMBER...... 5,102 + 838 0 32 0 .870 ...... - +2,308 .1 704 0 3,012 JANUARY 1966...... 83.39 5,947 + 845 0 44 0 889 6,868 +921 0 52 0 973 MARCH...... 86.38 6,646 -222 597 84 0 459 APRIL...... ;... 85.83 6,514 -132 199 94 0 161 3,676 -2,838 2,840 97 0 99 2,019 -1,657 1,671 66 0 80 1,967 -52 0 78 0 26 AUGUST...... 58.91 1,902 -65 0 72 0 7 SEPTEMBER...... 1,855 -47 0 54 0 7 ...... - -1,476 5,307 787 0 4,618 1,825 -30 0 44 0 14 ...... 58.23 1,829 +4 0 25 0 29 DECEMBER...... 5,969 +4,140 811 65 0 5,016 ...... - + 867 6,118 775 0 7,760 ...... -64.15 2,538 47 0 747 FEBRUARY...... 60.56 2,091 -447 640 33 0 226 ...... 64.10 2,531 +440 0 28 0 468 APRIL...... 3,958 +1,427 0 33 0 1,460 2,872 -1,086 1,492 77 0 483 ...... 61.63 2,218 -654 912 52 0 310 ...... 61.46 2,198 -20 0 77 0 57 2,130 -68 0 78 0 10 SEPTEMBER...... 60.53 2,087 -43 0 *8 0 5 ...... - +232 7,986 607 0 8,825 OCTOBER...... 2,032 -55 0 62 0 7 ...... 60.22 . 2,051 +19 0 29 0 48 DECEMBER...... 2,480 +429 0 27 0 456 ...... - -3,489 7,175 591 0 4,277 JANUARY 1968...... 64.56 2,593 +113 0 32 0 145 ...... 60.12 2,039 -554 665 27 0 138 ...... 61.23 2,1TO +131 0 35 0 166 ...... 62.06 2.2TO +100 0 44 0 144 MAY...... 62.34 2,306 +36 0 57 0 93 ...... 62.01 2,264 -42 0 70 0 28 ...... 61.43. 2,194 -70 0 80 0 10 2,114 -80 0 76 0 -4 SEPTEMBER...... 60.18 2,046 -68 0 61 0 -7 ...... -41 665 600 0 1,224 OCTOBER...... 59.84 2,007 -39 0 41 0 2 1,990 -17 0 32 0 15 DECEMBER...... 60.06 2,032 +42 0 25 0 67 ...... - -448 665 580 0 797 5,125 +3,093 0 24 0 3 117 12,269 +7,144 0 26 0 ...... 110.79 13,951 +1,682 2 796 108 0 4 586 ...... 110.29 13,773 ' -178 1 381 117 0 1 320 13,508 -265 1 427 150 0 1 312 UNE...... 93.66 8,538 -4,970 5 104 112 0 246 ...... 67.20 2,961 -5,577 5 739 124'92 0 286 2,618 -343 282 0 31 2,570 -48 0 69 0 21 ...... - +524 16,729 920 0 18,173 OCTOBER...... 2,530 -40 0 53 0 13 NOVEMBER...... 64.53 2,590 +60 0 49 0 109 DECEMBER...... 2,670 +80 0 31 0 111 ...... - +640 16,732 955 0 18,327 JANUARY 1970...... 2,770 +100 0 28 0 128 FEBRUARY...... 66.48 2,860 +90 0 39 0 129 MARCH...... 2,610 -250 446 46 0 242 ...... 65.18 2,680 +70 0 45 0 115 MAY ...... 65.15 2,670 -10 0 65 0 55 JUNE...... 64.70 2,610 -60 0 70 0 10 2,530 -80 0 88 0 AUGUST...... 63.51 2,450 -80 0 82 0 2 2,370 -80 0 82 0 2 ...... - -200 446 678 0 924 t GAGE HEIGHT AT 0800 HOURS ON LAST DAY OF MONTH. NOTE. FOR MON-THS WHEN DISCHARGE TO THE RESERVOIR WAS SMALL AND OTHER ELEMENTS WE'RE LARGE, DISCORDANT FIGURES OF DISCHARGE MAY APPEAR. THIS ARISES PRIMARILY FROM THE DIFFICULTY OF COMPUTING DISCHARGE AS A RESIDUAL OF SEVERAL LARGER QUANTITIES WHICH ARE NOT SUSCEPTIBLE TO MEASUREMENT WITH A PRECISION NECESSARY TO PRODUCE A FINAL ANSWER WITHIN DESIRABLE LIMITS OF ACCURACY. SAN DIEGUITO RIVER BASIN

11025500 SANTA YSABEL CREEK NEAR RAMONA, CALIF. LOCATION.--33"06'25", long 116°51'S5", in SWWIWWE't sec.27, T.12 S., R.I E., San Diego County, on left bank 1.6 miles downstream from Temescal Creek and 4.5 miles north of Ramona. DRAINAGE AREA.--112 sq mi. PERIOD OF RECORD.--February 1912 to February 1923, October 1943 to September 1970. Monthly discharge only for February 1912, published in WSP 1315-B. n sea level (levels by city of San Diego Water Department) . See WSP 1928 for history of changes prior to Feb. 4, 1923. EXTREMES .- -Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water years 1966-70 are contained in the following table: Maximum Minimum daily Wtr yr Date Discharge G.H. Date Tlischa rge 1966 Nov. 23, 1965 4,570 . 10.06 Long periods 0 1967 Dec. 6, 1966 6,050 11.44 do. 0 1968 Mar. 8, 1968 78 3.02 do. 0 1969 Jan. 25, 1969 6,180 11.55 Many days 0 1970 Mar. 5, 1970 88 3.09 do. 0 27, 1M16 (gage height, 14.0 ft, datum then in use) from rating curve extended above 1,500 cfs based on slope -conveyance computation of peak flow; no flow at times in some years. REMARKS. --Records good. Flow regulated since July 1954 by Sutherland Reservoir (see station 11024000). Some small diversions above station. REVISIONS.- -WSP 1928: Drainage area. DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY OCT NDV DEC JAN FEB MAR APR MAY JUN JUL AU6 SEP 1 0 2.8 25 8.5 5.8 1.4 2 0 2.4 16 7.0 11 1.1 3 0 2.D 13 6.0 8.7 1.0 4 0 1.6 12 5.0 .8 .90 % D 1.4 10 5.0 .9 .90 6 0 1.2 9 8.0 .6 .80 7 0 1.1 8 31 .3 .60 8 0 1.1 24 .0 .60 9 0 7.1 16 .8 .90 10 0 18 15 .3 1.1

11 0 14 12 .3 1.2 12 D 9.1 9.9 .3 1.1 13 0 13 9.1 .3 .90 14 0 IS 8.3 .3 .70 IS 0 13 T.9 .0 .60

16 0 15 T.I .0 .50 17 0 10 6.8 .8 .40 18 .10 8.3 6.4 .6 .30 19 .20 6.8 6.1 .4 .20 20 .10 6.1 5.8 .4 .20

21 .10 5.8 5.5 .4 .10 22 170 9.5 4.9 .2 .10 23 1,060 9.9 4.9 .0 .10'.10 24 22 6.4 4.9 .9 25 19 6.1 6.1 .9 .10 26 14 5.8 7.5 .8 .10 27 6.8 5.2 6.4 .5 .10 28 4.9 4.9 5.5 .6 .10 29 4.0 7.1 «.».»_ .0 .10 30 3.3 83 _ .5 .10 31 18 17 - .0 0 ~*

TOTAL 0 1,304.50 310.7 238.6 2S0.6 13 .4 5 16.40 0 MEAN 0 43.5 10.0 7.70 8. 95 4 34 1 .53 0 MAX 0 1,060 83 25 31 11 1.4 0 MIN 0 0 1.1 4.2 4.9 .0 0 0 AC-FT 0 2.590 616 473 497 67 118 33 0

CAL YR 1965 TOTAL 1,849.80 MEAN 5.07 MAX 1,060 MIN 0 AC-FT 3,670 HTR YR 1966 TOTAL 2,314.50 MEAN 6.34. MAX 1,060 MIN 0 AC-FT 4,590 SAN DIEGUITO RIVER BASIN

11025500 SANTA YSAEEL CREEK NEAR RAMONA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 0 4.3 8.3 1.6 2 0 4.3 6.4 1.4 6.8 13 5.2 3 0 4.0 5.8 1.6 5.8 12 4.3 4 0 4.0 5.5 3.3 5.5 12 3.8 5 469 4.0 5.2 3.0 8.7 11 3.5 6 11 3.5 7 455 3.8 4.3 3.3 5.5 9.1 3.5 8 9 37 3.3 .0 3.0 4.9 7.1 3.8 10 30 3.0 .3 2.8 4.6 8.3 4.6 0

11 24 3.3 .0 3.3 31 10 4.9 12 20 3.3 .8 3.5 44 8.7 5.5 13 17 3.8 .8 6.4 32 7.1 6.1 14 14 3.8 .8 47 21 6.1 6.8 15 12 3.8 .8 14 16 5.2 5.2

16 11 3.8 .8 8.7 14 4.9 4.3 17 9.8 4.0 .3 7.1 13 4.6 3.8 18 9. 3.5 .3 6.8 12 4.3 3.5 19 8. 3.3 .3 6.1 33 4.6 2.8 20 T« 3.3 .3 5.8 36 4.6 2.4

21 6. 3.0 .0 5.5 25 4.3 2.2 22 6. 4.8 .8 5.2 79 3.5 1.7 23 5. 23 .6 4.9 37 3.5 1.4 24 5. 14 .6 4.6 30 4.0 1.2 25 4. 95 .0 4.6 25 3.8 1.1

26 4. 18 2.4 4.6 22 3.5 1.0 27 4. 12 1.7 4.6 18 3.5 .80 28 3. 9.9 1.6 4.3 17 4.3 .60 29 4. 8.3 5.2 19 5.5 .60 30 5- 7.5 5.8 17 6.4 .40 31 7.5

TOTAL 0 3.858. 278.1 108.6 189.5 601.9 215.3 98.80 2 MEAN 0 12 8.97 3.88 6.11 20.1 6.95 3.29 MAX 0 ( 2.62 I iy 0.3 *tr MIN 0 0 3.0 1.6 1.4 4.6 3.5 .40 AC-FT 0 7,650 552 215 376 1,190 427 196 AC-FT 9, 040 HTR YR 1967 TOTAL 5,352.80 MEAN 14.7 MAX 2.620 MIN 0 AC-FT 10, 620

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1967 TO SEPTEMBER 196B MOV DEC JAN FEB MAR APR MAY JUN JUL

.10 .90 .10 .90 .10 .80 3.3 2.4 4.3 .20 .20 9.8

11 0 .20 .60 .20 12 0 .20 .60 .20 13 0 .20 .90 .20 14 0 .20 1.0 .10 15 0 .20 .90 .10 16 0 .20 .80 .10 17 0 .20 .80 .10 18 1.0 .20 .80 .10 19 15 .20 .70 .10 20 10 .20 .70 .10 21 2.4 .20 .70 .10 22 1.4 .20 .70 .10 23 .60 .20 .60 .10 24 .30 .10 .50 .10 25 .20 .10 .30 .80 0 26 .10 .20 .30 .60 0 27 .10 .40 .30 .50 0 28 .10 1.2 .30 .30 0 29 .10 1.7 .30 .30 0 30 .10 1.4 . 30 0 31 .10 1.1 . 30 TOTAL 0 0 31.50 10.50 18.10 48.00 19.70 MEAN 0 0 1.02 .34 .62 1.55 .66 MAX 0 0 15 1.7 1.0 9.8 4.3 MIN 000 .10 .30 .20 0 AC-FT 0 0 62 21 36 95 39 CAL YR 1967 TOTAL 1.526.10 MEAN 4.18 MAX 95 MIN 0 AC-FT 3.030 HTR YR 1968 TOTAL 127.80 MEAN .35 MAX 15 MIN 0 AC-FT 253 SAN DIEGUITO RIVER BASIN

11025500 SANTA YSABEL CREEK NEAR RAMONA, CALIF.--CONTINUED DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TD SEPTEMBER 1969 DAY DCT JUN JUL AUG 1 0 .01 .08 17 200 26 11 5.5 3.0 .01 2 0 .01 .09 13 133 26 11 5.5 2.8 0 3 0 .01 .09 12 117 37 11 5.5 2.6 0 4 0 .01 .09 11 103 37 14 5.5 2.5 0 5 0 .01 .09 12 B9 26 16 5.5 2.3 0 6 c .02 .09 141 77 29 16 5.5 2.2 0 7 0 .01 .09 114 72 28 16 6.1 2.0 0 8 0 .01 .09 47 65 27 12 5.8 1.6 0 9 0 .01 .09 30 55 24 11 6.1 1.4 0 10 0 .01 .09 22 77 24 11 7.1 1.2 0 11 0 .02 .09 18 70 25 10 9.5 1.2 0 12 0 .02 .10 15 60 24 9.5 8.7 1.1 0 13 0 .02 .13 14 64 22 9.5 7.9 .98 0 14 0 .02 1.6 13 60 20 8.7 7.1 .87 0 15 0 .02 .08 12 16 0 .02 .04 16 52 18 8.3 6.8 .48 0 17 0 .02 .02 13 49 17 7.9 6.8 .41 0 18 0 .02 .02 38 46 16 7.1 6.8 .28 0 19 0 .03 .09 .17 0 20 0 .03 .08 73 41 15 6.8 6.4 .09 0 21 0 .02 35 48 48 15 7.1 6.4 .09 0 22 0 .02 78 72 85 14 7.1 6.1 .04 0 23 0 .02 13 109 60 13 7.1 6.1 .02 0 24 0 .02 81 1.550 50 13 6.8 5.8 .02 0 25 0 .05 1, 810 1.970 40 12 6.4 5.8 .01 0 26 .01 .06 349 687 35 12 6.4 5.5 .01 0 27 .01 .06 208 339 30 11 .1 5.5 .01 0 .06 28 .01 .06 80 250 30 11 .1 4.9 .01 0 .02 29 .01 .06 76 29 11 .8 4.1 .01 0 .01 30 .01 .06 40 ...... 28 11 .8 3.5 .01 0 31 - .08 25 27 .5 .01 0 TOTAL 0 .05 .84 2. 798.14 5,738 1,994 599 281.7 185.7 28.08 .01 .79 MEAN 0 .002 027 90.3 205 64.3 20.0 9.09 6.19 .91 .0003 .026 MAX 0 .01 .08 1.810 1.970 200 37 16 9.5 3.0 .01 .06 MIN 0 0 .01 .02 11 27 - 11 5.5 3.5 .01 0 56 .02 CAL YR 1968 TOTAL 97.19 MEAN .27 MAX 9 MIN 0 AC-FT 193

DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG I .01 .01 .04 .06 1.2 48 .4 .98 .04 .04 0 2 .01 .02 .04 .02 1.1 47 .3 .72 .03 .04 0 3 .01 .01 .04 .02 1.1 21 .3 .57 .02 .03 .01 4 .01 .01 .04 .09 .88 13 .3 .49 .02 .03 .01 5 .01 .01 .04 .09 .76 45 .3 .48 .01 .03 .01 6 .01 .01 .01 .13 .88 16 .3 .54 .01 .03 0 7 .01 .01 .01 .17 .80 11 .3 .57 .01 .03 .01 8 .01 .01 .01 .17 .69 .3 .57 .01 .03 0 9 .01 .01 .02 .17 .69 .3 .55 .03 .04 0 10 .01 .01 .02 .34 3.4 .3 .43 .04 .04 0 11 .01 .01 .02 .34 10 .98 .38 .03 .04 .01 12 .01 .01 .02 .66 4.4 .87 .32 .02 .04 .01 13 .01 .01 .02 .66 3.4 .87 .29 .02 .04 0 14 .01 .01 .02 3.B 3.0 .87 .24 .02 .04 0 15 .01 .01 .02 2.2 2.4 .87 .16 .02 .04 0 16 .01 .01 .06 2.2 2.0 . 8 .15 .02 .04 0 17 .01 .01 .06 3.8 1.9 .06 .02 .02 0 IB .01 .01 .06 2.6 1.8 .03 .01 .02 0 19 .01 .01 .06 1.7 1.3 .03 .01 .01 0 20 .01 .01 .06 2.0 1.2 .03 .02 .01 0 21 .01 .02 .06 1.9 1.2 .03 .02 .02 0 22 .01 .04 .06 1.9 1.1 .03 .02 .02 0 23 .01 .04 .06 1.7 1.3 .05 .02 .01 0 24 .01 .06 .06 1.6 1.2 .09 .02 .01 0 25 .01 .06 .06 1.4 1.1 . 3 .07 .03 .01 0 26 .01 .04 .06 1.4 1.1 . 9 .10 .03 .01 0 27 .01 .06 .06 1.2 1.2 .17 .03 .01 0 28 .01 .04 .06 1.1 6.9 .20 .03 .01 0 29 .01 .04 .09 .98 .15 .03 .01 0 30 .01 .02 .09 1.1 __ ... .10 .03 .01 0 31 .01 .09 1.2 ...... 01 0 .77 .06 MEAN .010 .021 046 1.18 2.07 8.' 1.25 .28 .022 .025 .002 MAX .01 .06 .09 3.8 10 t 2.2 .98 .04 .04 .01 MIN .01 .01 .01 .02 .69 I .87 .03 .01 .01 0 AC-FT .6 1.3 2.8 73 115 5 75 17 1.3 1.5 .1 CAL YR 1969 TOTAL ll.627.7B MEAN 31.9 MAX 1,970 MIN 0 AC-FT 23,060 HTR YR 1970 TOTAL 406.67 MEAN 1.11 MAX 48 MIN 0 AC-FT 807 SAN DIEGUITO RIVER BASIN

11026000 SANTA YSABEL CREEK NEAR SAN PASQUAL, CALIF. LOCATION.--Lat 33°05'10", long 116°54'56", in NEV)WS<;SE»(S :.31, T.12 S., R.I E., San Diego County, on left bank east of San Pasqual. DRAINAGE AREA.--128 sq mi. PERIOD OF RECORD.--December 1905 to September 1910 and May 1911 to September 1912 (published as "near Escon- dido"), April 1947 to November 195S (irrigation seasons only), April 19S6 to September 1970. Records for October to December 1910, published in WSP 447, have been found to be in error and should not be used. GAGE.--Water-stage recorder. Concrete control since April 1947. Altitude of gage is 510 ft (from topographic

1966-70 are contained in the following table Maxitou Wtr yr Discharge G.H. Date Discharge 1966 23, 196S 5,260 10.98 Long periods 1967 6, 1966 6,130 11.56 do. 1968 8, 1968 a2.04 1969 25, 1969 12.19 1970 5, 1970 2.34 From floodmarks Period of record: discharge observed, 8,000 cfs Mar. 24, 1906 (gage height, 6.3 ft, site and datum en in use); no flo» most ye REMARKS.--Records good. No gage-height record Dec 24, 1967, to Jan. 26, 1968, Feb. 7 to Mar. 18, 1968. Flo regulated since July 1954- by Sutherland Reserve r (see station 11024000). Small diversion above station. REVISIONS (WATER YEARS).--See PERIOD OF RECORD.

DISCHARGE. IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL

1 0 3. 26 .9 . ,80 2 0 2. IB ? . 3 0 2. 1 .3 1 4 0 1. 1 .5 , S 0 . 0 . 1 .3 6 0 . 0 .2 . 7 0 . 0 3 , 8 0 . 0 2 . 9 0 .3. 1 t 10 0 32 1 11 0 16 1 B 12 0 8.0 1 . 1 13 0 11 . 14 0 IS , 15 0 13 16 0 IS 17 0 9.2 . 18 0 7.5 , 19 0 6.8 . 20 0 6330 8.9 . 24 31 6.3 ^ 25 21 6.1 26 16 5.9 . 27 10 5.7 . 28 6.0 5.5 f 29 4.5 6.B . , . 30 3.9 87 . . 31 22 20 __ -

TOTAL 0 1.425.8 323.90 244.3 271.1 141. 5 . 10 MEAN 0 47. S 10.4 7.86 9.68 4.5 MAX MIN 0 0 .70 4.2 5.2 2. AC-FT i

WTR YR 1966 TOTAL 2,470 .60 MEAN 6.77 MAX 1.330 MIN AC-FT 4,900 SAN DIEGUITO RIVER BASIN

11026000 SANTA YSABEL CREEK NEAR SAN PASQUAL, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL

1 0 3.9 9.2 1. 7.7 15 7.7 .20 2 0 3.9 7.7 1. 8.0 14 5.7 .10 3 0 3.7 7.0 1. 7.0 13 4.6 .10 * 0 3.5 6.3 3, 6.1 12 3.B .10 5 549 3.6 6.1 3- B.6 11 3.3 0 6 1,980 3.6 5.9 3. 7.7 11 3.2 0 7 686 8 109 3.2 5.0 j a 6.1 7.5 3.1 0 9 98 10 81 2.9 5.3 3. 4.8 7.7 4.3 0 11 56 2.9 5.0 J. 29 10 5.0 0 12 41 3.0 4.6 3. 57 8.6 5.5 0 13 24 3.0 4.4 4. 42 7.7 6.1 0 1* 16 3.3 4.2 55 25 6.5 7.0 0 15 11 3.0 4.4 18 18 5.7 5.3 0 16 8.9 3.1 4.4 9. 16 5.0 4.4 0 IT 7.0 3.8 3.8 8. 14 4.7 3.7 0 18 6.5 3.2 3.7 7. 13 4.3 3.5 0 19 6.1 3.0 3.6 7. 34 4.2 3.0 0 20 5.2 3.0 3.6 6. 44 4.7 2.6 0 21 4.8 3.1 3.4 6. 26 4.4 2.2 0 22 4.8 3.8 3.0 5 a 102 3.8 1.8 0 23 4.6 26 3.0 5. 54 3.6 1.5 0 24 4.4 12 3.0 4. 33 3.9 1.3 0 25 4.4 140 3.0 4. 28 3.6 1.0 0

26 4.7 29 2.9 4. 22 3.5 .90 0 27 4.3 15 2.2 4. 18 3.3 .80 0 28 4.2 11 1.8 4. 17 3.7 .60 0 29 4.2 8.9 5. 18 5.3 .40 0 30 4.6 8.6 _____ 6. 17 6.8 .20 0 31 8.9 5. 7.7 0

TOTAL 0 0 3,734.1 332.4 126.7 209. 694.8 218.3 99.10 .50 MEAN 0 0 120 10.7 4.53 6.7 23.2 7.04 3.30 016 MAX 0 C 1,980 140 9.2 5 102 15 7.7 .20 HIN 000 2.9 1.8 1. 4.8 3.3 .20 0 AC-FT 0 0 7,410 659 251 41 1,380 433 197 1.0

CAL YR 1966 TOTAL 4,455.00 MEAN 12.2 MAX 1.980 HIN AC-FT 8,840

DISCHARGE, IN CUBIC FEET PER SECOND , WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY OCT NOV DEC JUL

1 0 .10 .60 .20' .40 0 0 2 0 .10 .50 .20 2. 0 0 3 0 .10 .40 .20 2. 0 0 * 0 .10 .40 .20 2. 0 0 5 0 .10 .30 .20 3. 0 0 6 0 .10 .30 .20 2. 0 0 7 0 .10 .30 .20 1. 0 .10 8 0 .10 .30 10 .80 0 .10

.40 31

TOTAL 19.90 .20 MEAN .66 .007 MAX 3.2 .10 MIN AC-FT

MAX IB MIN 0 AC-FT SAN DIEGUITO RIVER BASIN

11026000 SANTA YSABEL CREEK NEAR SAN PASQUAL, CALIF. --CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY

1 0 .01 17 188 28 12 4.9 .2 .02 2 0 .02 14 131 28 12 4.9 .2 .01 3 0 .02 11 113 40 12 5.0 .1 .01 4 0 .02 12 99 33 15 4.9 .9 .02 5 0 .02 15 84 27 18 5.3 .9 .01 6 0 .02 139 78 31 19 .1 .9 .01 7 0 .01 175 72 28 19 .9 .9 .01 8 0 .02 52 65 26 16 .6 .7 ) 9 0 .02 29 62 26 14 .5 .5 .01 10 0 .02 22 81 27 12 .3 .4 .01 11 0 .03 18 77 27 11 8.6 .2 12 0 .02 17 63 25 11 10 .1 13 0 .02 15 71 23 9.8 9.7 .98 14 0 .20 13 68 25 9.3 8.3 .84 15 0 ,C6 13 57 24 9.0 7.2 .76

16 0 .04 19 52 22 8.6 6.6 .64 17 0 .03 14 49 20 8.2 6.9 .57 18 0 .03 18 47 21 6.9 6.7 .48 19 0 .04 88 45 19 6.5 5.8 .43 2D 0 .06 86 42 17 7.0 5.0 .38 21 0 21 45 49 15 7.3 4.6 .30 22 0 101 84 87 15 7.6 4.5 .26 23 0 9.3 104 54 15 7.3 4.5 .21 24 0 36 1.640 45 IS 6.9 4.7 .18 25 0 1, 850 2,120 38 15 6.7 6.0 .15 26 0 427 849 35 14 6.3 5.2 .11 27 0 242 297 34 13 6.1 4.1 .08 28 0 72 207 33 12 5.8 3.5 .06 29 0 66 ______31 12 5.3 2.8 .05 30 01 31 -.. . 29 12 S.I 2.3 .03 31 _____ 01 21 29 5.0 .02

TOTAL 0 0 02 2, 877.01 6,133 2,008 655 305.7 171.4 27.53 .11 0 MEAN 0 0 .0<106 92.8 219 64.8 21.8 9.86 5.71 .89 004 0 MAX 0 D 01 1,850 2,120 188 40 19 10 2.2 .02 0 MIN 0 0 0 .01 11 29 12 5.0 2.3 .02 0 0 AC-FT 0 0 .04 5,710 12,160 3,980 1,300 606 340 55 .2 0

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 DAY JUN JUL AUG SEP

1 0 .04 .87 59 1.9 1.4 .02 2 0 .03 .85 60 1.8 1.2 .02 3 0 .03 .77 28 1.8 1.0 .02 4 0 .04 .89 14 1.5 .80 .02 5 0 .04 .93 S3 1.4 .60 .02 6 0 .04 .92 20 1.3 .60 .02 7 0 .03 .91 13 1.2 .64 .02 8 01 .03 .84 9.2 1.2 .60 .02 9 . 03 .04 .82 7.7 1.2 .60 .02 10 04 .06 2.5 8.1 1.2 .51 .03

11 .04 .05 12 7.1 1.0 .37 .02 12 . 04 .06 S.8 6.4 .98 .04 .02 13 . 04 .05 3.8 S.4 .95 .04 .02 14 . 04 1.2 3.4 4.S .98 .04 .01 15 04 1.5 2.8 4.1 1.0 .04 .01 16 .04 1.5 2.2 3.6 1.2 .03 .01 17 . 04 3.0 2.0 3.4 1.7 .04 .01 18 . 05 2.5 1.9 3.3 1.8 .03 .01 19 . 06 1.7 1.6 2.6 1.4 .03 .01 20 07 1.6 1.3 2.5 l.S .02 .01 21 9 07 1.7 1.2 2.4 l.S .02 .01 22 . 07 1.6 1.2 2.4 1.5 .02 23 . 03 1.5 1.3 2.3 1.2 .02 24 . 03 1.2 1.3 2.3 1.1 .02 25 03 1.2 1.2 2.3 1.0 .02 26 04 1.1 1.1 2.4 1.0 .02 27 . 03 1.0 1.2 2.7 2.5 .02 28 . 03 .99 5.5 2.1 2.8 .02 29 . 03 .71 ______2.2 2.3 .02 30 . 03 .69 . . 2.3 1.8 .02 31 03 .78 ______2.4 ' .02 .35 0 ( MEAN 0 .031 .84 2.18 11.0 1.46 .29 .012 MAX 0 .07 3.0 12 60 2.8 1.4 .03 0 MIN 0 0 .03 .77 2.1 .95 .02 0 o AC-FT 0 1 .9 52 121 676 B7 18 .7 0 CAL VR 1969 TOTAL 12,178.71 MEAN 33.4 MAX 2,120 MIN 0 AC-FT 24,160 WTR VR 1970 TOTAL 481.68 MEAN 1.32 MAX 60 MIN 0 AC-FT 9SS SAN DIEGUITO RIVER BASIN

11027000 GUEJITO CREEK NEAR SAN PASQUAL, CALIF. LOCATION --Lat 33°06'57", long 116°57'08", in NWjNWjSE*; sec.23, T.12 S., R.I W., San Diego County, on left bank 0.3 mile upstream from Rockwood Canyon Creek-and 1.8 miles north of San Pasqual. DRAINAGE AREA.--22.5 sq mi. PERIOD OF RECORD.--December 1946 to September 1970. GAGE.--Water-stage recorder and concrete control. Altitude of gage 560 ft (from topographic map). AVERAGE DISCHARGE.--23 years (1947-70), 1.60 cfs (1,160 acre-ft per year); median of yearly mean discharge 0.4 cfs (290 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (30 cfs), water years 1966-70 Date Time Disch. G.H. Date Time Disch. G. H. Date Time Disch. G.H. Nov. 22, 1965 2300 »2,S50 7.45 Dec. 19 , 1967 1315 28 2. 34 Feb. 25, 1969 1900 1,760 5.92 Dec. 10, 1965 1100 66 2.70 Mar. 10, 1969 1645 35 2.43 Dec. 29, 1965 2400 110 2.95 Jan. 21 , 1969 1315 112 2. 96 Jan. 25 , 1969 1330 *2,100 6. 20 Feb. 28, 1970 *100 2.90 Dec. 6, 1966 2015 *2,920 6.78 Feb. 6 , 1969 2100 126 3. 03 Mar. 5, 1970 Apr. 22, 1967 0845 45 2.54 Feb. 19 , 1969 1545 55 2. 62 ninimiam daily d ischarj;e, water years 1966-70 Wtr yr Date Di scharge Wtr yr Date 1966 Long periods 0 1969 Long periods 1967 do. 0 1970 Aug. 8- 25, 1970 1968 Oct. 1 to Dec. 9, 1967 Period of record: Maximum discharge, 2,920 cfs Dec. 6, 1966 (gage height, 6.78 ft), from rating curve extended above 440 cfs on basis of slope-area measurements at gage heights 5.83 and 6.30 ft; no flow at times in most years. REMARKS.--Re

REVISIONS (WATER YEARS).--WSP 1315-E: 1947-48(M). WSP1715: 1956. WSP1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL 1 .30 .5 .90 .40 .10 0 .20 .2 1.4 .30 .10 0 3 .20 .0 1.4 .4 .10 0 4 .20 .80 .90 .4 .10 0 5 .10 80 .70 .3 i .10 .10 6 .10 8 .80 i3 .10 .10 7 .10 .70 .3 .10 .10 8 .10 .70 .3 .10 .10 9 9.6 .70 .30 .10 .10 10 25 .70 .30 .10 .10 11 6. .70 .30 .10 .10 12 2. , .60 .20 .20 0 13 4. , .60 .20 .10 0 14 4, t .60 .20 .10 0 IS 3. .60 .10 .10 0 16 10 0 .60 .10 .10 0 IT 3. 0 .60 .10 .10 0 18 2. 0 .50 .10 .10 0 19 1. 0 .50 .30 .10 0 20 1. 1 .50 .20 .10 0 21 1. .90 .90 .40 .20 .10 0 22 17 2. .80 .80 .40 .10 .10 0 23 24 2. .90 .70 .30 .10 0 24 .6 1. .80 .80 .50 .10 0 25 1 1. .80 1.0 1.6 .10 6 26 .5 1. .70 1.0 .90 .10 0 27 .2 1. .90 1.0 .80 .10 0 28 .70 .90 .80 .80 .70 .10 0 29 .50 5.9 .70 .70 .10 0 30 .40 26 2.3 .60 .10 .10 0 31 5.4 3.2 .50 0 TOTAL 0 448.90 124.80 53.50 50.10 22.10 6.20 2.40 .70 MEAN 0 15.0 4.03 1.73 1.79 .71 .21 .077 .023 MAX 0 249 26 9.1 8.6 1.6 .40 .20 .10 MIN 0 0 .10 .70 .70 .30 .10 0 0 AC-FT 0 890 248 106 99 44 12 4.8 1.4

WTR VR 1966 TOTAL 708.70 MEAN 1.94 MAX 249 HIM 0 AC-FT 1,410 NOTE. NO GAGE-HEIGHT RECORD NOV. 22-24. SAN DIEGUITO RIVER BASIN

11027000 GUEJITO CREEK NEAR SAN PASQUAL, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 MAY JUN JUL AUG SEP 1 0 .1 .8 .70 1.4 .0 1.2 .10 .02 2 0 .1 .6 .70 1.7 .8 .84 .10 .03 3 .40 .0 .5 .70 1.2 .7 .66 .10 .03 4 1 .0 .0 .4 1.4 1.0 .6 .57 .10 .03 5 774 .1 .4 1.1 1.0 .5 .51 .09 .04 6 1.15C .1 1.2 .80 1.2 .5 .49 .09 .04 7 161 .0 1.2 .70 1.0 .3 .47 .09 .04 8 16 .90 1.0 .70 1.1 .3 .47 .OB .05 9 8.0 .80 1.1 .70 .86 .2 .54 .08 .05 10 4 .7 .80 1.2 .70 .81 .5 .73 .07 .05 11 6 .4 .80 1.1 .80 7.1 .6 .90 .07 .04 12 10 .70 1.0 .80 11 .3 1.0 .07 .04 13 2 .6 .70 1.0 2.5 4.9 .2 1.2 .07 .04 14 2 .4 .70 1.1 9.0 2.9 .0 1.1 .07 .05 15 2 .1 .70 1.0 2.0 2.2 .84 .86 .07 .04 16 2 .0 .60 1.0 1.4 1.9 .79 .73 .07 .04 17 1 .B .60 .90 1.2 1.6 .72 .66 .07 .04 18 I .7 .60 .90 1.1 1.8 .70 .63 .06 .02 19 1 .6 .60 .90 1.0 4.B .73 .53 .06 .02 20 1 .5 .60 .90 1.0 5.5 .73 .42 .06 .02 21 1 .4 .60 .80 1.0 3.4 .67 .36 .06 .02 22 1 .3 5.0 .80 .90 20 .57 .30 .05 .01 23 1 .3 15 .90 .90 8.2 .52 .26 .05 .01 24 1 .2 4.0 .80 .80 4.4 .59 .27 .05 .01 25 1 .2 12 .80 .74 3.5 .54 .20 .06 .01 26 1 .3 4.0 .'80 .75 3.0 .55 .18 .04 .01 27 1.1 2.7 .70 .77 2.6 .53 .14 .03 0 28 1 .1 2.2 .60 .75 2.3 .62 .11 .02 0 29 1 .1 2.0 .97 2.7 .86 .10 .02 0 30 1 .3 1.8 .75 2.2 I .2 .10 .02 0 31 1 .1 2.2 1.1 1.2 .02 0 TOTAL 0 2, 160.60 68.00 29.40 38.43 107.27 32.86 16.53 1.99 .80 0 MEAN 0 6 9.7 2.19 1.05 1.24 3.58 1 .06 .55 .064 .026 0 MAX 0 1, 150 15 1.8 9.0 20 2.0 1.2 .10 .05 0 MIN g 0 .60 .60 .70 .81 .-52 .10 .02 0 0 AC-FT 0 4,290 135- 58 76 213 65 33 4.0 1.6 0

WTR YR

DISCHARGE. IN CU8IC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY OCT NOV DEC JAN FED MAR APR MAY JUN JUL AUG SEP 1 2 0 3 0 .54 .56 .35 1.0 15 .07 .06 .03 .02 4 0 .54 .53 .31 .63 .18 .07 .06 .03 .02 5 0 6 0 .54 .46 .32 .46 15 .07 .06 .03 .02 7 0 8 0 .52 .49 4.5 .36 .14 .06 .06 .03 .02 9 0 10 10 .52 .67 1.0 .24 13 .06 .06 .03 .02 11 . 10 .52 .64 .74 .21 13 .06 .05 .03 .02 12 13 9 90 .52 .73 .59 .23 48 .06 .05 .03 .02 14 1. 0 .52 1.0 .72 .23 36 .06 .05 .03 .02 15 * 80 .52 .74 .59 .22 24 .06 .05 .03 .02 16 17 1. 18 6. B .50 .58 .59 .34 12 .06 .04 .02 .02 19 18 .45 .54 .55 .29 .10 .06 .04 ' .02 .02 20 3. 21 1. 22 90 .47 .57 .36 .28 09 .06 .04 .02 .'01 23 . 60 .43 .51 .35 .23 09 .07 .04 .02 .01 24 60 .39 .46 .34 .18 09 .06 .04 .02 .01 25

28 .54 1.3 .50 .29 .19 .08 .06 .04 .02 .01 29 .54 .79 .47 .26 .17 .08 .06 .04 .02 .01 31 ;54 .64 .28 .07 .04 .02

MEAN 1.33 .56 .56 .64 .37 .14 .062 .048 .025 .017 MAX 18 1.3 1.0 4.5 2.2 .4B .07 .06 .03 .02 MIN 0 .39 .41 .26 .14 .07 .06 .04 .02 .01 AC-FT 82 34 32 39 22 8.9 3.7 3.0 1.5 J.O SAN DIEGUITO RIVER BASIN

11027000 GUEJITO CREEK NEAR SAN PASQUAL, CALIF.--CONTINUED

DISCHARGE f IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY OCT NOV AUG SEP

1 .01 .01 .01 .01 7.6 40 6.1 2.9 1.5 .75 .16 .04 2 .01 .01 .01 .01 6.1 3D .0 2.9 1.6 .72 .16 .04 3 .01 .01 .01 .01 5.0 26 .0 3.1 1.6 .69 .12 .04 4 .01 .01 .01 .01 4.4 24 .5 3.5 1.5 .63 .10 .04 5 .01 .01 .01 .01 5.0 21 .0 3.7 1.7 .65 .08 .03

6 .01 .01 .01 .01 50 20 .0 3.8 1.9 .73 .08 .03 T .01 .01 .01 .01 ?6 19 .6 3.7 1.7 .73 .07 .03 8 .01 .01 .01 .01 12 IB .5 3.3 1.6 .63 .08 .03 9 .01 .01 .01 .01 9.4 18 .3 2.9 1.6 .56 .10 .03 10 .01 .01 .01 .01 7.2 22 .1 2.7 1.8 .52 .17 .03 11 .01 .01 .01 .01 6.1 26 .8 2.5 2.2 .53 .08 .03 12 .01 .01 .01 .01 5.7 22 .4 2.4 2.3 .63 .07 .03 13 .01 .01 .01 .01 5.1 25 .0 2.4 2.1 .44 .07 .03 14 .01 .01 .01 6.5 4.5 23 .4 2.4 .9 .40 .06 .03 15 .01 .01 .01 2.3 4.8 19 .B 2.3 .8 .38 .06 .03

16 .01 .01 .01 .93 6.3 16 .5 2.2 .7 .37 .08 .03 17 .01 .01 .01 .63 4.2 14 .2 2.1 .9 .35 .06 .03 18 .01 .01 .01 .52 8.0 13 .3 2.0 .8 .29 .06 .03 19 .01 .01 .01 1.2 27 12 .1 1.9 .5 .27 .05 .03 20 .01 .01 .02 2.0 18 12 .B 1.9 1.5 .33 .05 .03 21 .01 .01 .01 31 11 11 3.7 2.0 1.4 .53 .05 .02 22 .01 .01 .01 24 28 23 J.8 2.0 .5 .33 .05 .02 23 .01 .01 .01 3.1 26 16 ).8 1.9 .5 .26 .04 .02 24 .01 .01 .01 57 607 8.0 1.7 1.9 .6 .24 .04 .02 25 .01 .01 .02 727 718 7.9 3.7 1.8 .8 .25 .04 .02

26 .01 .01 .02 150 181 7.7 3.3 1.7 .5 .28 .04 .02 27 .01 .01 .02 50 45 7.3 J.O 1.7 .3 .33 .04 .02 28 .01 .01 .02 17 35 6.9 2.9 1.6 .2 .30 .04 .02 29 .01 .01 .01 24 6 . 7 Z . 9 1.5 .1 .30 .04 .02 30 .01 .01 .01 13 O.5 .24 .04 .02 31 .01 .01 10 1C .17 .04 TOTAL .31 .30 .36 1 .120.31 1.873.4 S27.3 157.2 73.7 49.00 13.83 2.22 .84 MEAN .010 .010 .012 36.1 66.9 17.0 5 24 2.38 1.63 .45 .072 .028 MAX .01 .01 .02 727 718 40 9.0 3.8 2.3 .75 .17 .04 HIN .01 .01 .01 .01 4.2 6.3 2.9 l.S .90 .17 .04 .02 AC-FT .6 .6 .7 2,220 3.720 1,050 312 146 97 27 4.4 1.7

WTR YR 1969 TOTAL 3,818.77 MEAN 10.5 MAX 727 MIN .01 AC-FT 7,57p

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .02 .11 .41 .57 .72 25 74 .34 .14 .05 .02 .02 2 .02 .13 .40 .56 .56 26 68 .32 .09 .04 .02 .02 3 .02 .13 .44 .56 .51 g.O 71 .31 .08 .03 .01 .01 4 .02 .14 .51 .57 .60 4.0 67 .31 .11 .03 .01 .01 5 .02 .20 .50 .57 .60 25 61 .30 .12 .03 .01 .01 6 .02 .39 .47 .57 .58 6.0 62 .33 .11 .03 .01 .01 7 .02 1.9 .48 .57 .58 3.0 68 .41 .12 .03 .01 .01 8 .02 .69 .57 .58 .54 2.5 67 .38 .16 .04 0 .01 9 .02 .59 1.1 .58 .52 2.0 69 .38 .28 .03 0 .01 10 .03 1.2 .71 .93 1.8 1.9 65 .37 .42 .03 0 .01

11 .04 .60 .61 .92 5.4 1.7 61 .32 .44 .03 0 .01 12 .04 .45 .58 1.1 1.6 1.4 62 .27 .28 .03 0 .01 13 .04 .46 .56 .85 1.2 1.2 60 .25 .31 .03 0 .01 14 .05 .48 .53 .79 .90 1.1 58 .23 .24 .03 0 .01 15 .06 .68 .53 .94 .84 l.l 55 .17 .19 .04 0 .01 16 .07 .96 .53 1.0 .82 1.0 58 .11 .15 .04 0 .01 17 .09 .62 .55 1.4 .80 .95 54 .09 .13 .04 0 .01 IB .09 .38 .58 .94 .80 .94 52 .08 .11 .04 0 .01 19 .09 .20 .60 .64 .80 .72 50 .09 . 10 .04 0 .01 20 .09 .20 .64 .80 .80 .76 48 .10 .08 .03 0 .01 21 .10 .26 .64 .77 .80 .78 47 .11 .08 .04 0 .01 22 .16 .37 .66 .76 .79 .82 50 .11 .08 .04 0 .01 23 .20 .38 .65 .76 .78 .81 45 .12 .07 .04 0 .01 24 .23 .38 .63 .75 .77 .80 43 .14 .06 .04 0 .01 25 .26 .33 .61 .76 .76 .83 41 .14 .06 .04 0 .01 26 .26 .34 .63 .74 .75 .91 SO .27 .05 .04 .01 .01 27 .29 .35 .62 .72 .75 .99 45 .43 .05 .04 .02 .01 28 .28 .31 .59 .69 18 .76 40 .48 .05 .04 .02 .01 29 .24 .30 .54 .55 .81 . 36 .39 .05 .04 .02 .01 30 .14 .35 .52 .54 « .89 35 .27 .05 .04 .02 .01 31 .10 .57 .59 .96 .20 .03 .02

TOTAL 3.13 13.88 17.96 23.27 44.37 120.63 16. 62 7.82 4.26 1.12 .20 .32 MEAN .10 .46 .58 .75 1.58 3.89 55 .25 .14 .036 .007 .011 MAX .29 1.9 1.1 1.4 18 26 74 .48 .44 .05 .02 .02 HIN .02 .11 .40 .54 .51 .72 35 .08 .05 .03 0 .01 AC-FT 6.2 28 36 46 88 239 33 16 8.5' 2.2 .4 .6 CAL YR 1969 TOTAL 3,852.77 MEAN 10.6 MAX 727 MIN .01 AC-FT 7,640 WTR YR 1970 TOTAL 253.58 MEAN .69 MAX 26 MIN 0 AC-FT 503

NOTE. NO GAGE-HEIGHT RECORD FEB. 14 TO NAR. 9. SAN DIEGUITO RIVER BASIN

11028500 SANTA MARIA CREEK NEAR RAMONA, CALIF. LOCATION. --Lat 33°03'08", long 116°S6'41", in SE'nSESiiSE'6 sec.11, T. 13 S. , R.I W. , San Diego County, on 3.8 miles northwest of Ramona and 4.6 miles upstream from mouth. DRAINAGE AREA.--57. 6 sq mi. PERIOD OF RECORD.--November 1912 to September 1920, October 1946 to September 1970. GAGE.--Water-stage recorder. Concrete control since October 1946. Datum of gage is 1,294.44 ft above level. Prior to Oct. 1, 1946, at datum 1.78 ft lower. AVERAGE DISCHARGE.--31 years (1913-20, 1946-70), 3.76 cfs (2,720 acre-ft per year); m of yearly mean dis- charges, 0.1 cfs (72 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (") and peak discharges above base (20 cfs), water years 1966-70 Date Time Disch. G..H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 23, 1965 0630 »1,170 4. 56 Jan. 25 , 1967 0200 48 2.08 Feb . 6 , 1969 2045 238 2.76 Dec. 10, 1965 1330 72 2. 29 Feb . 20 , 1969 0100 155 2.46 Dec. 30, 1965 0100 120 2. 54 Dec. 18 , 1967 1700 *22 1.78 Feb . 25 , 1969 2000 *1,400 4.80 Jan. 5, 1966 1100 62 2. 18 Mar . 10 , 1969 1430 93 2.18 Jan. 21 , 1969 1100 27 1.76 Dec. 6, 1966 2100 *1,800 5. 18 Jan. 25 , 1969 1445 1,220 4.62 Mar . 1 , 1970 0830 162 2.49 Mar . 5 , 1970 0430 *190 2.60 No flow for several months in ea ch year, Period of record: Maximum di scharge, 7, 140 cfs 27, 1916 (gage hei ght, 14. 1 ft, from flo odmarks , pres- ent datum) , from rating curve extended above 600 c ffon basis of slope-are a me asurement of peak flow; no flow for several months in each year. REMARKS.--Records good, No regulation above station. City of Ramona pumps water from stream above station for municipal supply. REVISIONS (WATER YEARS).--WSP 1285: 1952. WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

JUN Ml

1 0 .20 .8 1.6 .40 2 0 .20 .4 1.2 .70 3 0 .10 .2 1.0 .60 4 0 .10 .0 .90 .30 5 0 .10 .5 .80 .20 6 0 .10 .0 ^. .20 7 0 0 .6 8. .20 8 a 0 .3 5. .20 9 0 33 .2 2. .10 10 0 42 .1 1. .10 11 0 11 .0 1. .10 12 0 3.3 .0 1. .10 13 0 13 .90 .80 .10 14 0 22 .80 .60 .10 15 0 10 .80 .60 .10 16 0 20 .80 .50 .10 IT 0 10 .60 .40 .10 18 0 7.5 .60 .40 .10 19 0 2.0 .60 .40 .10 20 0 2.0 .80 .40 21 0 1.5 .70 .40 22 3.5 1.5 .70 .30 23 280 3.0 .70 .30 24 8.8 2.0 .70 .30 0 25 22 1.5 .60 .40 .10 26 10 1.1 .60 .50 .10 27 1.8 .90 .80 .40 .10 28 .80 .80 .70 .30 .10 29 .50 12 .60 .10 30 .40 40 3 . 1 0 31 6.1 3 0 TOTAL 0 327.80 247.00 52 .50 36.00 4.30 .10 MEAN 0 10.9 7.97 .69 1.29 .14 003 MAX 0 280 42 9.B 8.0 .70 .10 HIM 0 0 0 .60 .30 0 o AC-FT 0 650 490 104 71 8.5 .2 SAN DIEGUITO RIVER BASIN

11028500 SANTA MARIA CREEK NEAR RAMONA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

NOV DEC JAN FEB MAR APR HAY JUN JUL

11 .9 . 20 .40 .20 2.2 .40 .10 12 .4 20 .40 .20 9.0 .40 .10 13 .9 ^ 20 .40 .50 3.2 .40 .10 14 .7 . 20 .50 6.9 1.3 .30 .10 15 .3 20 .40 1.7 .80 30 .10 16 .1 ^ 20 .40 .90 .60 .30 .10 17 .0 , 20 .30 .50 .50 .30 .10 18 .0 . 20 .30 .40 .40 .30 .10 19 .90 . 20 .30 .40 1.5 .30 .10 20 .80 20 .30 .30 2.7 .30 .10 21 .80 20 .20 .30 1.5 .20 22 .70 , 80 .20 .20 1.9 .20 23 .60 16 .20 .20 2.6 .20 24 .60 4. a .20 .20 1.4 .10 25 .60 27 .20 .20 1.0 .10 26 .90 5. 6 .20 .20 .70 .10 27 .70 2. 9 .20 .20 .70 .10 28 .90 1. 6 .10 .20 .60 .10 29 .90 1. 3 .20 .70 .20 30 .60 1. 3 ... .20 .70 .20 31 . 50 1. 3 .20 .20 TOTAL 0 0 822.30 67.40 11.40 1-6.70 38.20 10.60 2.10 MEAN 0 0 26.5 2. 17 .41 .54 1.27 .34 070 MAX 0 0 505 27 1.2 6.9 9.0 .60 .20 HIN 000 . 20 .10 .10 .20 .10 0 AC -FT 0 0 1,630 134 23 -33 76 21 4.2 -FT 1,820

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 NOV DEC JAN FEB MAR APR MAY JUN JUL

0 .10 0 0 1.9 0 0 .20 0 .10 .10 .10 .10

.10 .10 .10 .10 .10 .10 .10 .10

.10 .10 .10 .10 .10 .10

TOTAL 0 8.90 0 1.00 2.70 1.10 MEAN 0 .29 0 .039 .087 .036 MAX 0 2.9 0 .10 1.7 .10 MIN 0 0 0 0 0 AC-FT 0 18 0 2.0 5.4

HTR YR 1968 TOTAL 17.80 MEAN .049 MAX 2.9 MIN 0 AC-FT 35 SAN DIEGUITO RIVER BASIN

11028500 SANTA MARIA CREEK NEAR RAMONA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEHIIER 1969 JUN JUL

t 0 1.5 66 3.4 .26 .15 .01 2 0 1.1 44 3.2 .26 .15 .01 3 0 .78 35 6.8 .32 .13 .02 4 0 .73 28 4.7 .45 .07 .01 5 0 .85 23 5.7 .47 .08 .02

6 0 104 21 4.1 .53 .08 .02 7 0 50 19 3.6 .51 .06 .02 8 0 9.7 15 3.2 .39 .04 .02 9 0 5.0 14 2.9 .28 .03 .02 10 0 3.1 50 2.9 .23 .04 .02 11 0 2.6 49 3.0 .18 .07 .02 12 0 2.5 25 2.6 .21 .02 .02 13 0 2.2 46 2.4 .16 .02 .02 14 1.1 1.7 34 2.4 .11 .02 .03 15 .04 1.6 20 2.2 .10 .02 .03 16 .01 1.9 15 1.9 .09 .04 .03 17 .01 1.6 13 1.5 .08 .05 .02 IB .01 16 12 1.5 .08 .03 .02 19 .01 64 12 1.3 .08 .02 .02 20 .01 59 11 1.1 .07 .02 .02 21 8.2 13 22 .93 .05 .03 .02 22 2.4 138 44 .73 .05 .02 .01 23 .21 47 21 .77 .06 .01 .01 24 1.0 269 13 .63 .0.7 .02 .01 25 270 582 7.5 .54 .07 .02 .03

26 59 278 6.5 .39 .08 .03 .03 27 24 80 5.4 .29 .12 .01 .02 28 11 58 5.4 .22 .14 .01 .02

.03 2.1 .-15 .04

TDTAL 0 0 400.20 1.794.86 688.9 65.39 5.92 1.31 MEAN 0 0 12.9 64.1 22.2 2.18 .19 .044 MAX 0 0 270 582 66 6.8 .53 .15 MIN 0 0 0 .73 3.7 .22 AC-FT 0 0 794 3.560 1,370 130

HTR YR 1969 TOTAL 2,958.12 MEAN 8.10 MAX 582 MIN 0 AC-FT 5,870

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

APR MAY JUN JUL

1 0 .04 .01 .01 101 2 .01 .04 '.01 .01 59 3 .01 .08 .01 .01 9.7 4 .02 .08 .01 ..01 2.4 5 .01 .12 .01 .01 69 6 .05 .01 .03 .01 7.6 7 .06 .01 .03 .01 2.4 8 .05 .01 .01 .01 1.5 9 .04 .01 .03 .01 1.2

.98 .06 .63 .01 .01 .43 .02 .01 .33 .01 .37

.11 .09 .07

.04 .05 .05 31 .04

TOTAL 259.71 MEAN 8.38 .012 MAX 101 .03 MIN .04 .01 AC-FT 515 SAN DIEGUITO RIVER BASIN 59

11029000 SAN DIEGUITO RIVER NEAR SAN PASQUAL, CALIF. LOCATION.--Lat 33°04 1 00", long 117°02 1 05", in San Bernardo Grant, San Diego County, on right bank 1.5 miles down­ stream from Bach Creek, 4.5 miles southeast of Escondido, and 5 miles west of San Pasqual. DRAINAGE AREA.--249 sq mi. PERIOD OF RECORD.--April 1947 to April 1956 (irrigation seasons only), May 1956 to September 1966 (discontinued). GAGE.--Water-stage recorder. Altitude of gage is 325 ft (from topographic map). EXTREMES.--Maximum discharge during water year 1966, 4,160 cfs Nov. 23 (gage height, 7.40 ft), from rating curve extended above 1,000 cfs on basis of field estimate at gage height 7.35 ft; no flow for most of time in each year. Period of record: Maximum discharge, 4,160 cfs Nov. 23, 1965 (gage height, 7.40 ft), from rating curve extended above 1,000 cfs on basis of field estimate at gage height 7.35 ft; no flow for most months in each year. REMARKS.--Records poor. Flow regulated since July 1954 by Sutherland Reservoir (see station 11024000). Diver­ sions for irrigation and pumping from wells along river in San Pasqual Valley above station. REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

NOV. 23, 1965... 1,380 DEC. 13, 1965... 2.8 DEC. 17, 1965... 34 DEC. 30, 1965... 130 DEC. 9...... 1.8 14...... 80 18...... 8.0 31...... 20 10...... 50 15...... 74 19...... 2.4 JAN. 1, 1966... 4.1 11...... 48 16...... 66 20...... 20 2...... 1.0 12...... 7.0

MONTH CFS-DAYS MAXIMUM MINIMUM MEAN RUNOFF IN ACRE-FEET NOVEMBER 1965...... 1,380 1,380 0 46.0 2,740 DECEMBER...... 445 130 0 14.4 883 CAL YR 1965...... 1,825 1,380 0 5.00 3,620

...... 5.1 4.1 0 .16 10 ...... 1,830.1 1,380 0 5.01 3,630

NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. 60 SAN DIEGUITO RIVER BASIN

11030000 SAN DIEGUITO RIVER AT LAKE HODGES, CALIF. LOCATION.--Lat 33°02'48", long 117'07'33", in NE!(SE>i;NW3i; sec.18, T.13 S. , R.2 W. , San Diego County, on right bank 800 ft upstream from Lake Hodges Dam and 6.2 miles southwest of Escondido. DRAINAGE AREA.--303 sq mi. PERIOD OF RECORD.--January 1916 to September 1968 (discontinued). Published a ar Bernardo" prior to October 1920 and as "near Escondido" October 1920 to September 1925. GAGE.--Nonrecording gage. Datum of gage is 200.0 ft above n a level. Prior to January 1919, at different datum (prior to completion of dam). REMARKS.--Records of total inflow represent all the water reaching Lake Hodges, including precipitation on the lake and supplemental water from Colorado River delivered through aqueduct of San Diego County Water Author­ ity. Total inflow computed on basis of records of storage, release (draft), spill, leakage, and evaporation. Records of net inflow exclude supplemental water from Colorado River. Area and capacity tables for lake are based on a resurvey in 1948. Evaporation from reservoir surface computed on basis of evaporation from Colo­ rado land pan using a coefficient of 0.80, excepting the period October 1957 to June 1963, when the mass- transfer method was used. Lake Hodges Dam was completed and storage began Feb. 1, 1919. Capacity of lake at spillway level (gage height, 115.0 ft), 33,550 acre-ft. Dead storage, 1,160 acre-ft below lowest outlet at age height 54.0 ft, included in these records. Water drawn from Lake Hodges passes through a conduit to fan Dieguito re-regulating reservoir, from which it is released as required for municipal use. Flow regulated since July 1954 by Sutherland Reservoir (see station 11024000). Diversions for irrigation above Lake Hodges. COOPERATION.--Records computed in cooperation with city of San Diego. REVISIONS (WATER YEARS).--WSP 1091: 1946. WSP1121: 1947. WSP173S: 1958-60.

MONTHLY NET INFLOW, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1968 MONTH I6HT (ACRE- IN (ACRE- RATION PLUS EETlt FEET) FEET) INCLUDED LAKE HODGES (ACRE- FEET)

CAL YR 1965.

.... 71.25 4,508 -13 27 47 APRIL...... 65.80 3,186 -804 81 96 MAY...... 60.95 2,207 -979 ' 90 91 JUNE...... 56.54 1,488 -719 63 82 459 -474 42 48 198 -261 24 16 .... - -950 4,658 677 114 -84 72 7 121 +7 0 4 DECEMBER...... 82.65 8,403 +8,282 104 42 .... - +3,747 4,779 620 JANUARY 1967...... 83.08 8,585 +182 134 72 391 8,590 +5 0 95 102 8,508 -82 171 105 196 386 .... 80.50 7,535 -931 867 179 116 6,636 -899 817 151 JULY...... 74.20 5,342 -1,294 1,150 192 AUGUST...... 72.50 4,850 -492 308 162 .... 72.10 4,738 -112 0 116 HTR YR 1967...... - +4,540 3,934 1,241 3,882 -856 767 115 NOVEMBER...... 3,356 -526 580 56 DECEMBER...... 66.70 3,391 +35 316 29 CAL YR 1967.

JANUARY 1968.. 65.00 3,010 -381 397 55 55 FEBRUARY...... 63.75 2,750 -260 331 104 104 MARCH...... 62.70 2,542 -208 549 401 401 APRIL...... 58.34 1,758 -784 698 -14 -14 MAY...... 53.54 1,104 -654 487 -101 -101 JUNE...... 47.20 531 -573 476 -52 -52 JULY...... 37.62 150 -381 300 -61 -61 AUGUST...... 37.10 139 -11 SEPTEMBER..... 36.43 126 -13 WTR YR 1968. -4,612 4,901 557 849 849

t GAGE HEIGHT AT 0800 HOURS ON LAST DAY OF MONTH. NOTE. FOR MONTHS WHEN INFLOW TO THE LAKE WAS SMALL AND OTHER QUANTITIES MERE LARGE, DISCORDANT FIGURES OF NET INFLOW MAY APPEAR. THIS ARISES PRIMARILY FROM THE DIFFICULTY OF COMPUTING NET INFLOW AS THE RESIDUAL OF SEVERAL LARGER QUANTITIES WHICH ARE NOT SUSCEPTIBLE TO MEASUREMENT WITH A PRECISION NECESSARY TO PRODUCE A FINAL ANSWER WITHIN DESIRABLE LIMITS OF ACCURACY. SAN LUIS REY RIVER BASIN

11031500 AGUA CALIENTE CREEK NEAR WARNER SPRINGS, CALIF. LOCATION.--Lat 33°17'19", long 116°39'11', in San Jose del Valle Grant, San Diego County, on downstream end of righfpier of Warner Springs. DRAINAGE AREA.--19.0 sq mi. PERIOD OF RECORD.--February 1961 to September 1970.. GAGE.--Water-stage recorder. Altitude of gage is 2,950 ft (from topographic map). Prior to Jan. 29, 1966, at site 120 ft upstream at present datum (used as supplementary gage since Dec. 12, 1968). AVERAGE DISCHARGE.--9 years, 1.44 cfs (1,040 acre-ft per year. EXTREMES.--Maximums and minimums (discharge in cubic feet per seco ige height in feet). Annual maximum discharge (*) and peak discharges above (50 cfs), water years 1966-70 Dat e Time Disch. G.H. Date Time Disch. .H. Date Time Disch. Nov . 23, 1965 0030 *740 aS. 60 Dec. 19, 1967 0300 1.2 .10 Sept. 5, 1969 1900 114 Dec 29, 1965 - 136 4.78 Jan. 25, 1969 1430 495 5.92 Mar. 2, 1970 1130 Dec . 6, 1966 2030 *1,200 5.18 Feb. 6, 1969 1900 116 4.93 Jan . 24, 1967 - Feb. 25, 1969 2300 564 6.36 a At p resent site. No fl Pe rd: Maxi charge, 1,200 cfs :. 6, 1966 (gage height, 5.18 ft), from rating extended above 240 cfs; no flow for most of time in each year.

above station

DAY OCT NQV DEC iIMn

1 0 1.0 .0 .40 .4 .40 .30 .20 2 0 1.0 .5 .50 .4 .30 .30 .20 3 0 1.0 .0 .60 .4 .40 .30 .10 4 0 1.0 .7 .50 .4 .40 .40 .10 5 0 1.0 .3 .70 .4 .40 .40 .10 6 0 1.0 .5 1.4 .3 .30 .40 .10 7 0 1.0 .2 3.4 .3 .30 .40 .10 8 0 1.0 .1 1.4 .2 .30 .40 .10 9 0 4.5 .0 .80 .2 .20 .40 .10 10 0 5.0 .7 .70 .1 .20 .30 .10 tl 0 2.5 .5 .70 .1 .20 .30 .10 12 0 1.5 .4 .70 .1 .20 .30 .10 13 0 1.2 .2 .70 .0 .20 .30 .10 14 0 1.0 .1 1.1 .0 .20 .30 .10 15 0 .90 .0 1.3 .0 .20 .30 .10 16 0 .90 .90 2.0 .90 .20 .20 .10 17 0 .90 .80 2.0 .90 .20 .20 .10 18 0 .90 .80 2.0 .80 .20 .20 .10 19 0 .90 .70 2.0 .80 .30 .20 .10 20 0 .90 .70 1.9 .80 .30 .20 .10 21 0 .90 .60 1.9 .70 .30 .10 .10 22 81 .90 .60 1.9 .70 .30 .10 .10 23 164 .90 .50 1.7 .60 .30 .10 .10 24 7.0 .90 .50 1.7 .60 .30 .10 .10 25 3.7 .90 .50 1.7 .60 .40 .10 .10 26 2.4 .90 .50 1.6 .60 .40 .10 .10 27 1.4 .90 .50 1.6 .60 .40 .30 .10 28 1.2 .90 .50 1.4 .60 .40 .20 .10 29 1.1 40 .50 .50 .40 .20 .10 30 1.0 10 .50 .50 .40 .20 .10 31 6.0 .30 .40 .20 TOTAL 0 262.8 92.30 46.60 38.30 28.90 9.00 7.80 3.20 0 MEAN 0 8.76 2.98 1.50 1.37 .93 .30 .25 .11 0 MAX 0 164 40 5.0 3.4 1.4 .40 .40 .20 0 HIN 0 0 .90 .30 .40 .40 .20 .10 .10 0 AC-FT 0 521 183 92 76 57 18 15 6.4 0 994 HTR VR 1966 TOTAL 488.90 MEAN 1.34 MAX 164 MIN 0 AC-FT 970

NOTE. NO GAGE-HEIGHT RECORD NOV. 24 TO JAN. 29. SAN LUIS REV RIVER BASIN

11031500 AGUA CALIENTE CREEK NEAR WARNER SPRINGS, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

DAY OCT NOV DEC JAN FEB MAR APR HAY JUN JUL AUG SEP

1 0 0 0 .10 0 .20 3.6 .60 .20 .10 .10 2 0 0 0 .10 0 .30 3.1 .50 .20 .10 .10 3 0 0 0 .10 .20 .30 2.6 .40 .20 .10 .10 4 0 0 0 .10 .30 .30 2.6 .40 .20 .10 0 5 0 31 0 .10 .30 .10 2.4 .40 .20 .10 0 6 0 315 0 .10 .20 0 2.2 .40 .20 .10 0 7 c 116 0 .10 .20 0 2.1 .40 .20 .10 0 a .10 21 0 .10 .20 .10 2.0 .40 .20 .10 0 9 0 12 0 .10 0 0 1.6 .30 .20 .10 0 10 0 11 0 .10 .10 0 2.0 .30 .20 .10 0 11 0 6.0 .10 .10 .10 .30 .9 .30 .20 .10 0 12 0 6.0 .10 .10 .10 .60 .6 .30 .10 .10 0 13 0 4.5 0 0 2.5 .70 .6 .30 .10 .10 0 14 0 3.5 0 0 2.6 1.6 .5 .30 .10 .10 0 15 0 2.0 0 0 1.0 2.1 .4 .20 .10 .10 0

16 0 1.0 0 0 .20 2.1 1.3 .20 .10 1.1 0 17 0 .50 0 0 .10 2.2 1.1 .20 .10 .'10.10 0 IB 0 .10 0 0 .10 2.4 1.0 .20 .10 0 19 0 0 0 0 .10 3.0 1.0 .20 .10 .10 0 20 0 0 0 0 .10 3.9 .90 .20 .10 .10 0 21 0 0 C 0 .10 5.1 .60 .20 .10 .10 0 22 0 0 .10 0" .10 14 .60 .20 .10 .10 0 23 0 0 .20 0 .10 10 .70 .20 .10 .10 0 24 0 0 .10 0 .10 9.5 .70 .20 .10 .10 0 25 0 0 13 0 .10 9.5 .70 .20 .10 .10 0

26 0 0 15 0 0 6.1 .50 .20 .10 .10 0 27 0 0 5.0 0 0 7.0 .60 .20 .10 .10 0 26 0 0 1.0 0 0 5.7 .70 .20 .10 .10 0 29 0 0 .70 0 4.9 .70 .20 .10 .10 0 30 0 0 .40 ----- 0 4.1 .60 .20 .10 .10 0 31 0 .20 .10 .60 .10 .50 TOTAL 0 .10 .30 MEAN 0 .003 17.1 1.16 .043 .29 3.28 1.45 .26 .14 .15 .010 MAX 0 .10 315 15 .10 2.6 14 3.6 .60 .20 1.1 .10 MIN 0 0 0 0 0 0 0 .50 .20 .10 .10 0 AC-FT 0 .2 1,050 71 2.4 IB 195 69 17 8.3 B.9 .6

OISCHARff- '" « " 1C FEET PER SEC DND, MATER YEAR OCTOB ER 1967 0 SEPTEH 3ER 1966 DAY OCT NOV DEC JUN JUL AUG SEP

1 0 .10 C 0 0 .10 0 0 2 0 »10 0 0 .10 .10 0 0 3 0 .10 0 0 .10 .10 0 0 4 0 0 0- 0 0 .10 0 0 5 0 0 0 0 0 .10 0 0 6 0 D 0 0 0 .10 .10 0 7 0 0 0 0 0 .10 .10 0 B 0 0 0 .20 0 .20 .ID 0 9 0 0 0 .20 0 .20 .10 0 10 0 0 .10 .20 0 .20 .10 0

11 0 0 .10 .10 0 .10 0 0 12 0 0 .10 .10 0 .10 0 0 13 0 0 .10 .10 0 .10 0 0 14 0 0 .20 .10 0 .10 0 0 15 0 0 .20 .10 0 .10 0 0 16 0 0 .10 .10 0 .10 0 0 17 0 0 .10 .10 0 0 0 0 IB .10 0 .10 .10 0 0 0 0 19 .40 0 .10 .10 0 0 0 0 20 .20 0 .10 .10 0 0 0 0 21 .10 0 .10 0 0 0 0 0 22 .10 0 .10 0 0 0 0 .10 23 .10 0 .10 0 0 0 0 0 24 .10 0 .10 0 0 0 0 0

TOTAL 0 2.20 .30 1.60 1.60 .70 .90 MEAN 0 .071 .010 .062 .052 .023 .017 MAX 0 .40 .10 .20 .20 .10 HIN 0 0 0 0 0 0 AC-FT 0 4.4 .6 3.6 3.2 1.4 CAL YR 1967 TOTAL 209 20 MEAN . 7 MAX 15 H N 0 AC-FT 415 IB SAN LUIS REY RIVER BASIN

11031SOO AGUA CALIENTE CREEK NEAR WARNER SPRINGS, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND. MATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 OCT NOV DEC JAN FEB MAR APR HAY JUN JUL 1 0 21 114 .5 3.4 .3 .37 2 0 20 3D .2 3.4 .3 .48 3 0 18 28 .8 3.6 .4 .48 .05 4 0 16 26 .2 4.2 .3 .48 .05 5 0 20 25 .6 4.9 .2 .48 9.2

6 0 56 24 .9 6.3 .0 .48 5.5 7 0 32 22 .4 4.7 .0 .48 2.9 8 0 21 20 .1 3.8 .0 .42 1.9 9 0 18 18 .8 3.4 .1 .42 10 0 16 20 .1 3.4 .2 .37 11 0 15 18 .5 2.9 .3 .42 12 0 14 16 .9 2.7 .2 .42 13 0 13 15 .9 2.7 .0 .37 14 1.1 12 14 15 .11 11 13 .9 2.7 .76 .37 16 0 10 12 17 0 9.1 12 .5 2.6 .76 .48 18 0 8.1 12 .5 2.4 .60 .37 19 0 7.0 11 .2 2.3 .54 .27 20 .25 6.5 10 .8 2.3 .48 .27 21 5.5 8.B 12 .8 2.3 .42 .27 22 1.2 11 16 .8 2.1 .37 .27 23 .23 25 14 .8 2.1 .37 .27 24 2.0 263 12 .6 2.1 .37 .27 25 178 31B 10 .8 2.0 .37 . .27 26 122 281 10 .4 1.9 .37 .27 27 60 114 8.9 .1 1.9 .37 7.4 28 46 126 8.2 .1 1.9 .37 .32 29 40 7.8 .4 1.6 .37 .13 30 32 7.8 .4 1.6 .37 .13 31 25 " 7.5 1.4 .11 .05

T07AL 0 0 0 .81 25.82 MEAN 0 0 0 16.6 53.2 16.5 4 99 2.84 .60 .58 091 .86 MAX 0 0 0 178 318 114 .8 6.3 1.4 7.4 .13 9.2 HIM 0 0 0 0 6.5 7.5 .1 1.4 .37 .11 .05 .05 AC-FT 0 0 0 1,020 2,960 1.140 97 174 47 35 5.6 51

WTR YR 1969 TOTAL 2,686.12 MEAN 7.91 MAX 318 MIN 0 AC-FT 5,720

DISCHARGE , IN CUBIC FEET PER SECOND , WATER YEAR OCT06ER 1969 TO SEPTEMBER 1970 OCT JUN JUL

1 .04 .01 .02 0 .04 14 .34 .20 .13 2 .04 .01 .02 0 .05 34 .34 .20 .13 3 .05 .01 .02 0 .06 12 .33 .20 .13 4 .05 .01 .02 0 .06 6.9 .33 .20 .13 5 .04 .02 .02 0 .06 6.6 .33 .20 .13

6 .04 .04 .02 0 .06 7.5 .32 .20 .13 7 .02 .05 .02 0 .06 4.2 .32 .20 .13 8 .02 .04 .02 0 .06 2.5 .27 .20 .13 9 .02 .04 .02 0 .06 1.0 .27 .20 .11 10 .03 .05 .02 .01 .13 .60 .23 ' .20 .11

11 .03 .03 .02 .01 .06 .60 .27 .20 .11 12 .03 .02 .02 .01 .05 .50 .32 .20 .11 13 .04 .02 .02 .01 .05 .48 .32 .20 .11 14 .04 .02 .02 .01 .05 .45 .32 .16 .11 15 .05 .03 .02 .01 .05 .43 .32 .16 .11 16 .04 .03 .02 .02 .04 .41 .27 .13 .11 17 .04 .02 .02 .02 .04 .39 .23 .13 .08 18 .05 .02 .02 .01 .04 .39 .23 .13 .08 19 .05 .02 .02 .01 .04 .38 .23 .13 .06 20 .05 .02 .02 .01 .04 .37 .23 .16 .06

21 .04 .02 .02 .02 .04 .36 .20 .16 .06 22 23 24 .04 .02 .01 .02 .05 .35 .16 .16 .04 25 .04 .02 0 .02 .05 .35 .16 .16 .04 26 .03 .02 0 .03 .05 .35 .16 .16 .04 27 .03 .02 0 .03 .05 .35 .20 .16 .02 . 26 .02 .02 .01 .03 .08 .34 .20 .13 .02 29 .01 .02 0 .03 .. » .34 .20 .13 .02 30 .01 .02 0 .03 » .34 .20 .13 3 31 .01 0 .03 .34 .13 TOTAL 1.08 .71 .48 .41 1.50 97.54 7.66 5.24 2.56 MEAN .035 .024 .016 .013 .054 3.15 .26 .17 .066 MAX .05 .05 .02 .03 .13 34 .34 .20 .13 MIN .01 .01 0 0 .04 .34 .16 .13 0 AC-FT 2.1 1.4 1.0 .8 3.0 193 15 10 5.1

WTR YR 1970 TOTAL 117.20 MEAN .32 MAX 34 MIN 0 AC-FT 232 64 SAN LUIS REY RIVER BASIN

11033000 WEST FORK SAN LUIS REY RIVER NEAR WARNER SPRINGS, CALIF. LOCATION.--Lat 33°17'50", long 116°45'30", in San Jose del Valle Grant, San Diego County, on left bank 0.1 mile downstream from small unnamed tributary, 2.5 miles upstream from mouth, and 7.5 miles west of Warner Springs. DRAINAGE AREA.--25.5 sq mi. PERIOD OF RECORD.--January 1913 to November 1915, October 1956 to September 1970. GAGE.--Water-stage der. Altitude of gage is 2,800 ft (from topographic map). Prior to Oct. 1, 1956, at different datum. AVERAGE DISCHARGE.--15 years (1913-15, 1957-70), 8.29 cfs (6,010 acre-ft per year) median of yearly mean dis- charges, 2.4 cfs (1,700 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (100 cfs), water years 1966-70 Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 22, 1965 2200 *1,690 10.25 Apr. 11, 1967 1315 167 5.41 Jan 25, 1969 1330 3,900 alO.12 Dec. 29, 1965 2200 442 7.13 Apr. 22, 1967 0500 295 6.03 Feb. 6, 1969 1145 485 5.70 Feb. 25, 1969 1730 3,180 9.50 Dec. 6, 1966 1930 *4,200 11.87 Mar. 8, 1968 1230 *315 6.13 Mar. 21, 1969 1545 158 4.33 Jan. 24, 1967 2315 670 7.41 Mar. 13, 1967 2245 371 6.37 Jan. 21, 1969 1100 260 5.85 Mar. 2, 1970 0930 *260 4.98

urn daily discharge, water y Discharge Wtr yr Date Discharge 1966 Many days 1969 Dec. 11-19, 1968 .03 1967 Oct. 9-21, 1966 1970 Dec. 11, 1969 .03 1968 Oct. 23, 1967 Period of record: Maximum discharge, 4,200 cfs Dec. 6, 1966 (gage height, 11.87 ft), from rating CUT extended above 250 cfs on basis of slope-area measurement of peak flow; no flow at times in most years.

REVISIONS.--WSP 1928: Drainage area.

DISCHARGE. IN CUBIC FEET PER SECOND. WATER VEAR OCTOBER 1965 TO SEPTEMBER 1966

OAT OCT NOV DEC JAN

1 .10 .10 10 34 13 9.4 4.6 .9 .70 .30 .20 .20 2 .10 .10 10 24 12 10 4.3 .8 .60 .30 .20 .20 3 .10 .10 9.0 22 11 11 4.2 .60 .30 .20 .20 4 .10 .10 9.0 21 11 11 4.0 .60 .30 .20 .10 5 .10 .10 9.0 20 11 12 3.8 .60 .30 .20 .10 6 .10 .10 9.0 18 10 11 3.7 .60 .30 .20 .10 7 .10 .10 9.0 16 10 10 3.7 .50 .30 .20 .10 8 .10 .10 9.0 15 20 9 3.5 .60 .30 .20 .10 9 .10 .10 20 14 18 8 3.4 .60 .30 .20 .10 10 .10 .10 27 13 17 8. 3.5 .60 .30 .20 .10 11 .10 .20 20 12 16 3.3 .50 .30 .20 .10 12 .10 .20 18 11 14 3.3 .50 .30 .20 .10 13 .10 .20 16 10 13 3.2 .50 .40 .20 .10 14 .20 .20 14 9.4 12 3.0 .40 .40 .10 .20 15 .20 .30 13 9.2 12 3.0 .40 .40 .10 .20 16 .20 .40 13 9.2 12 2.8 .40 .40 .10 .20 IT .20 .50 12 9.0 12 2.8 .40 .30 .10 .20 18 .20 .50 12 9.0 12 2.9 .40 .30 .10 .20 19 .20 .50 11 9.0 11 3.6 .40 .30 - .10 .20 20 .20 .40 11 8.9 11 3.7 .40 .30 .10 .20 21 .10 .40 10 8.8 11 3.1 .90 .40 .30 .10 .20 22 .10 346 12 8.4 10 3.2 .90 .40 .30 .10 .20 23 .10 236 11 8.2 10 3.0 .90 .40 .30 .10 .20 24 .20 28 11 8.0 10 2.7 .90 .40 .30 .10 .20 25 .20 63 10 7.5 9.8 2.4 .80 .40 .30 .10 .20 26 .20 20 10 7.2 9.7 2.3 .BO .40 .30 .20 .10 27 .10 12 10 7.0 9.5 2.2 .BO .30 .30 .10 .10 28 .10 11 10 6.8 9.3 2.1 .80 .30 .30 .10 .10 29 .10 10 102 6.6 - . 2.0 .70 .30 .30 .10 .10 30 .10 10 94 11 . . 2.0 .70 .30 .30 .10 .10 31 .10 41 15 .70 .30 .20 TOTAL 4.10 740.80 582.0 388.2 337.3 242. 95.3 37.80 13.90 9.70 4.60 4.50 MEAN .13 24.7 IB. 8 12.5 12.0 7.1 3.18 1.22 .46 .31 .15 .15 MAX .20 346 102 34 20 4.6 1.9 .70 .40 .20 .20 MIN .10 .10 9.0 6.6 9.3 4. 2.0 .70 .30 .30 .10 .10 AC -FT 8.1 1.470 1.150 770 669 48 189 75 28 19 9.1 B.9 CAL YR 1965 TOTAL 2,237 .60 MEAN 6.13 MAX 346 MIN .10 AC-FT 4,440

NOTE. NO GAGE-HEIGHT RECORD JAN. 3 TO FEB. 17. SAN LUIS REY RIVER BASIN

11033000 WEST FORK SAN LUIS REY RIVER NEAR WARNER SPRINGS, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .10 .10 .40 8.4 25 5.9 19 39 13 2.1 .44 .20 2 .10 .10 .40 8.3 24 5.9 24 34 11 2.0 .40 .22 3 .10 .20 3.5 B.2 22 5.7 IB 32 10 2.0 .38 .21 4 .10 .30 4.3 B.I 20 12 16 30 9.0 1.9 .36 .21 5 .10 .30 330 B.O 19 11 35 30 9.0 1.9 .34 .19 6 .10 .10 1,180 7.6 IS 9. 21 28 9.1 1.8 .32 .18 7 .10 .10 690 7.4 13 B. IB 26 8.8 1.8 .30 .18 8 .10 .10 297 7.1 12 7. IB 25 8.6 1.8 .29 .18 9 0 .10 100 6.6 12 7. 16 24 8.4 1.7 .26 .IB 10 0 .10 SO 6.3 11 6. 14 29 8.2 1.7 .27 .18 11 (3 .10 30 6.0 10 13 56 25 8.0 1.6 .26 .17 12 0 .1C 20 5.7 10 12 42 23 8.3 1.6 .25 .17 13 0 .10 17 5. 5 10 95 49 21 11 1.6 .25 4.3 14 0 .10 16 5.3 9.2 100 4B 19 9.6 1.5 .26 2.B IS 0 .10 15 5.1 9.1 32 38 18 8.1 l.S .27 .21 16 0 .10 14 5.1 9.2 24 34 17 7.0 1.4 .26 .20 17 0 .10 13 4.9 8.6 21 30 16 6.3 1.4 .26 .20 18 0 .10 12 4.B 8.7 18 32 16 5.4 1.3 .26 .20 19 0 .10 11 4.6 8.3 16 51 IS 5.1 1.3 .26 .20 20 0 .10 11 4.6 7.7 14 47 14 5.1 1.2 .25 .19 21 0 .10 10 4.5 7.1 13 66 13 S.I 1.1 .24 .19 22 .10 .10 9.6 17 7.0 13 174 13 4.B 1.0 .27 .19 23 .10 .10 9.2 56 7.1 12 76 12 4.3 1.0 .25 .19 24 .10 .10 9.0 153 7.0 11 65 13 4.1 .90 .24 .19 25 .10 .20 8.5 171 6.5 11 57 12 3.5 .80 .24 .20 26 .10 .30 8.3 70 6.5 11 53 11 3.0 .70 .23 .IB 27 .10 .30 8.0 61 5.9 11 SO 10 2.5 .65 .22 .IB 2B .10 .30 7.8 53 5.9 10 46 10 2.4 .60 .21 .IB 29 .10 .40 7.6 4B 14 51 11 2.3 .55 .20 .19 30 .10 .40 7.4 44 12 42 12 2.2 .52 .19 .IB 31 .10 8.5 34 15 13 .48 .20 TOTAL l.BO 4.80 2,908.50 841.1 316.8 SSB.2 1,306 611 203.2 41.40 8.45 12.44 MEAN .058 .16 93. B 27.1 11.3 1B.O 43.5 19.7 6.77 1.34 .27 .41 MAX .10 .40 1,180 171 25 100 174 39 13 2.1 .44 4.3 MIN 0 .10 .40 4.5 5.9 5.7 14 10 2.2 .4B .19 .17 AC-FT 3.6 9.5 5,770 1,670 628 1,110 2,590 1,210 403 B2 17 25 CAL YR 1966 TOTAL 4,048.60 MEAN 11.1 MAX 1,180 MIN 0 AC-FT 8,030 H7R VR 1967 TOTAL 6,813 .69 MEAN 18.7 MAX 1,180 MIN 0 AC-FT 13,510 NOTE. NO GAGE-HEIGHT RECORD DEC. 7 TO JAN. 12, JUNE 26 TO AUG. 14.

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 NOV DEC JAN FEB MAR APR ' MAY JUN JUL

.11 .36 4.0 5.3 1.8 3.5 .11 .33 3.7 4.3 1.6 30 .10 .33 3.5 4.0 l.B 1 .10 .33 3.2 3.8 1.8 .3 .08 .33 2.9 3.6 l.B .4 .07 .30 2.9 3.4 1.8 .1 .06 .29 2.7 3.4 2.4 .6 .07 .29 2.7 3.4 73 .1 .08 .27 2.9 3.4 27 .9 .OB .26 2.9 3.5 16 .8 .OB .28 4.9 3.5 11 .7 .08 .26 5.2 3.4 8.6 .6 .07 .24 4.0 4.5 7.6 .4 .07 .24 3.6 B.4 8.9 .3 .08 .24 3.6 5.0 6.B .0 .08 .2* 4.2 4.0 6.1 .0 .08 .24 3.7 3.5 6.1 .2 .07 .OB .40 3.3 3.1 5.6 .0 .OB .96 50 3.0 2.8 5.3 .8 6.8 10 2.9 2.6 4.7 .1 .06 .08 4.1 5.0 2.9 2.3 4.2 .8 .05 .09 .06 .OB .57 4.1 2.9 2.1 4.2 .4 .51 4.9 2.9 2.0 4.0 .4 .46 6.5 2.9 1.9 3.7 .4 27 .45 6.8 6.4 1.9 3.6 .4 28 .41 7.2 11 1.8 3.5 .0 29 .37 6.7 6.5 l.B 3.3 a q 30 .36 5. 5 4.5 3.2 B 9 31 .10 -- 4.7 5. 5 3.1 TOTAL 6. 20.67 126.93 121.1 97.3 241.5 168.5 6 MEAN .69 4.09 3.91 3.36 7.79 5.62 2 MAX I 6.8 SO 11 B.4 73 30 MIN .06 .24 2.7 1.8 l.B 2.9 AC-FT 41 252 240 193 479 334 1 CAL YR 1967 TOTAL 4,052.32 MEAN 11.1 HTR YR 1968 TOTAL B70.60 ' *£AN 2.38 SAN LUIS REY RIVER BASIN

11033000 WEST FORK SAN LUIS REY RIVER NEAR WARNER SPRINGS, CALIF.--CONTINUED

DISCHARGE , IN CUBIC FEET PER SECOND , MATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

DAY OCT NOV DEC j«n SEP 1 .11 .12 5.4 1.2 .25 .16 2 .11 .12 .06 .17 31 125 42 20 5.4 1.2 .22 .16 3 .13 .12 .06 .17 26 115 42 19 5.5 1.1 .20 .16 4 .13 .12 .06 .17 23 101 41 18 5.4 .93 .19 .15 5 .13 .12 .05 .17 50 87 41 18 5.2 .86 .18 .19

6 .13 .12 .05 . 7 240 B5 40 22 5.0 .89 .18 .IB 7 .13 .12 .05 . 7 108 78 39 17 .0 .78 .20 .24 8 .13 .12 .04 . 7 68 73 39 15 .1 .70 .20 .23 9 .11 .12 .0* . 7 57 72 3B 13 .5 .64 .20 .25 to .11 .12 .04 . 7 49 76 37 13 .2 .60 .20 .24 11 .11 .12 .03 .17 45 76 36 12 .5 .64 .20 .23 12 .11 .12 .03 .17 43 79 35 11 .B .68 .21 .IB 13 .11 .12 .03 .17 39 75 34 11 .7 .59 .22 .18 1* .11 .13 .03 31 35 69 33 10 4.6 .46 .22 .18 15 .13 .16 .03 11 38 64 32 10 4.3 .41 .22 .18 16 .12 .13 .03 3.4 54 61 31 9. 4.3 .35 .19 .18 17 .12 .13 .03 2.0 36 59 31 8. 4.3 .39 .18 .18 .12 .13 .03 1.5 .IB 18 19 .12 .13 .03 6.7 48 57 29 7. 3.3 .4 .18 .18 20 .12 .12 .05 23 49 56 29 7. 3.0 .4 .16 .18 21 .12 .09 .05 137 47 95 28 7.5 3.2 .4 .15 .IB 22 .12 .09 .05 48 48 90 27 7,3 3.2 .4 .12 .22 23 .12 .09 .04 16 121 66 26 6.8 3.0 .4 .12 .22 24 .12 .09 .04 180 932 59 25 6.5 2.7 .4 .11 .22 25 .12 .09 .05 856 1,480 54 25 6.5 2.5 .4 .11 .22 26 .12 .08 4.3 450 342 51 24 5.9 2.2 .46 .10 .22 27 .12 .08 1.3 200 194 49 23 6.4 2.1 .46 .09 .22 28 .12 .08 .26 100 167 47 22 6.3 2.1 .43 .09 .22 29 .12 .07 .20 58 46 22 6.1 1.9 ..37 * * .22 30 .12 .07 .18 46 44 21 5.5 1.6 .33 .22 31 .12 .17 40 5.4 .32 Il6 5.97 MEAN .12 .17 .20 MAX .13 .16 4.3 856 1,480 163 42 22 6.B 1.2 .25 .25 KIN .11 .07 .03 .17 23 42 21 5.4 1.6 .32 .09 .15 AC-FT 7.4 6.6 15 37 11 12

NOTE NO GAGE-HEIGHT RECORD APR 3 TO MAY 5.

DISCHARGE > IN CUBIC FEET PER SECOND , WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 DAY

1 .22 .27 .07 .25 .90 81 .5 2.3 .46 .29 .07 .08 2 .22 .27 .07 .22 .90 110 .2 2.0 .46 .29 .07 .07 3 .22 .27 .07 .22 .90 25 .C l.a .46 .25 .07 .07 4 .22 .27 .07 .22 .90 13 .OB 5 .22 .27 .OB .20 .90 31 .9 1.4 .45 .20 .08 .07 6 .22 .23 .08 .22 .94 19 .9 1.5 .42 .19 .05 .06 7 .22 .19 .08 .22 .83 14 .8 1.4 .44 .19 .04 .06 B .22 .12 .11 .22 .80 10 .9 1.4 .44 .20 .05 .07 9 .22 .10 .12 .22 .82 8.4 .9 1.3 .42 .17 .04 .05 10 .22 .15 .14 .67 1.7 10 .9 1.2 .39 .14 .06 .05 11 .22 .12 .8 1.1 .40 .11 .07 .03 12 .22 .11 .14 1.2 3.B 7.1 .B 1.1 .39 .10 ' .07 .06 13 .22 .11 .14 1.1 2.6 6.1 .7 .99 .46 .12 .OB .06 14 .22 .08 .14 .91 2.0 4.7 .6 .90 .43 *12 .07 .07 15 .09 .07

16 .22 .08 .14 .66 1.0 3.9 .7 .71 .43 .13 .12 .07 17 .22 .08 .20 1.4 .81 3.4 .9 .68 .39 .14 .10 .07 18 .22 .08 .29 1.2 .57 3.1 .0 , .62 .37 .15 .08 .OB 19 .22 .11 .37 .94 .75 2.9 .0 .59 .35 .15 .09 .07 20 .27 .10 .26 .89 .70 2.9 .7 .56 .34 .15 .07 .05 21 .27 .08 .35 .90 .42 2.7 .0 .57 .35 .17 .06 .06 22 .27 .07 .45 1.0 .51 2.5 .7 .58 .35 .18 .OB .06 23 .27 .07 .23 .96 .43 2.3 .2 .54 .32 .17 .07 .06 24 .27 .07 .23 .90 .51 2.2 . I .54 .33 .19 .09 .06 25 .27 .37 .33 1.0 .54 2.1 .8 .50 .28 .16 .14 .07 26 .27 .05 .33 1.0 .52 2.1 .6 .49 .27 .15 .12 .07 27 28 .27 .09 .IB 1.0 a. 3 1.9 .B .42 .25 .10 .13 .17 29 .27 .05 .34 1.0 ~«_« 1.9 .7 .47 .26 .09 .10 .22 30 .27 .05 .33 .97 ~. . 1.9 .B .46 .29 .OB .OB .18 31 .27 .23 .94 2.3 ~ .46 .07 .08

TOTAL 7.42 3.7* 6.18 23.26 43.24 394.6 6 .6 29.43 11.34 4.95 2.56 2.34 MEAN .24 .12 .20 .75 1.54 12.7 2 15 .95 .38 .16 .083 .078 MAX .27 .27 .45 1.4 8.4 110 .B 2.3 .46 .29 .16 .22 KIN .22 .05 .07 .20 .42 1.9 .6 .42 .24 .07 .04 .03 AC-FT 15 7.4 12 46 86 783 12B 58 22 9.8 5.1 4.6

NOTE. NO GAGE-HEIGHT RECORD OCT. i TO NOV. 6. SAN LUIS REY RIVER BASIN

11035000 SAN LUIS REY RIVER AT LAKE HENSHAW, NEAR MESA GRANDE, CALIF. LOCATION.--Lat 33°14'20", long 116°45'43", in Valle de San Jose Grant, San Diego County, at Henshaw Dam, 4 miles north of Mesa Grande.

DRAINAGE AREA.--206 sq mi. PERIOD OF RECORD.--October 1922 to September 1968 (discontinued). October 1911 to September 1922 at site 1 mile downstream published as "near Mesa Grande"; records not equivalent owing to change in natural water losses resulting from creation of Lake Henshaw. Monthly net discharge only October to December 1922, published in WSP 1315-B. GAGE.--No rding te 1 mile downstream at different datum. AVERAGE DISCHARGE. --11 years (1911-22), 59.6 cfs (43,160 acre-ft per year), below damsite; 46 years (1922-68), 24.2 cfs (17,550 acre-ft per year), discharge at Lake Henshaw, excluding 90 percent of precipitation on lak surface; median of year mean discharges, 14 cfs (10,400 acre-ft per year). REMARKS. --Records of net discharge represent all water reaching Lake Hensh cluding 90 percent of rainfall on water surface of lake and supplemental water obtained by pumping ground water from ake bed. Net discharge computed on basis of records of storage, release (draft), spill, leakage, evaporation, precipitation, and ground-water pumpage. Monthly evaporation from lake surface computed on basis of evaporation from a floating pan using a coefficient of 0.87, except during periods when winds swamp the floating pan. Net evaporation for these periods is computed on basis of Colorado land pan using coefficient of 0.80. Storage began on Oct. 7, 1922. Area and capacity tables for lake are based on resurvey made in October 1951. Capacity of lake at spillway level (gage height, 107.00 ft), 194,300 acre-ft. No dead storage. No flow over spillway since dam was completed. Water is released down San Luis Rey River for diversion downstream for irrigation, power, and domestic use. No diversion above Lake Henshaw. COOPERATION. --Records furnished by Vista Irrigation District. REVISIONS.- -WSP 1715: Drainage area. MONTHLY NET DISCHARGE, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1968

MONTH GAGE CONTENTS CHANGE DRAFT NET SPILL PUMPED NET HEIGHT (ACRE- IN DISCHARGE (FEET) FEET) CONTENTS RATION LEAKAGE WATER (ACRE- (ACRE- FEET) LAKE HENSHAW FEET) FEET) FEET) OCTOBER 1965...... 38.40 5,060 +174 283 762 -84 NOVEMBER...... 42.96 9,072 +4,012 -728 593 2,703 DECEMB ER...... 44.90 11,293 +2,221 -433 192 1,596 6,698

+1,148 0 22 201 969 FEBRUARY...... 0 19 233 1,262 277 527 184 94 ...... 44.75 11,112 -1,493 959 711 128 138 JULY...... 7,011 721 108 ...... 39.25 5,686 -1,325 838 630

12,719

1,542 48 74 563 1,211 APR I L 3,218 1,223 480 165 244 SEPTEMBER...... 43.22 9,353 -2,171 1 591 535 -61 WTR YR 1967...... 18,056

OCTOBER...... 42.69 8,787 -566 167 465 NOVEMBER...... 41.89 7,979 -808 974 -32 DECEMBER...... 42.70 8,797 +818 -328 CAL YR 1967...... 9,226 JANUARY 1968...... 42.48 8,569 -228 440 276 FEBRUARY...... 41.49 7,596 -973 1,138 186 331 MARCH...... 40.77 6,940 -656 1,321 267 852 APRIL...... 40.83 6,993 +53 643 292 513 475 MAY...... 40.01 6,291 -702 1,101 476 742 133 JUNE...... 39.06 5,542 822 -74 JULY...... 36.75 3,988 1,554 2,002 515 990 -27 AUGUST...... 36. 30 3,725 -263 768 439 1,015 -71 SEPTEMBER...... 35.95 3,529 -196 706 360 987 -117 WTR YR 1968...... -5,824 10,201 3,279 5,237 2,419 NOTE. THE AMOUNT OF PRECIPITATION EXCLUDED DURING WATER YEARS 1966-68 WAS 1,862, 2,467, AND 952 ACRE-FT, RESPECTIVELY. FOR MONTHS WHEN INFLOW TO THE LAKE WAS SHALL AND OTHER OUANTITIES WERE LARGE, DISCORDANT FIGURES OF NET DISCHARGE MAY APPEAR. THIS ARISES PRIMARILY FROM THE DIFFICULTY OF COMPUTING NET DISCHARGE AS THE RESID­ UAL OF SEVERAL LARGER OUANTITIES, WHICH ARE NOT SUSCEPTIBLE TO MEASUREMENT WITH A PRECISION NECESSARY TO PRODUCE A FINAL ANSWER WITHIN DESIRABLE LIMITS OF ACCURACY. SAN LUIS KEY RIVER BASIN

11037700 PAUMA CREEK NEAR PAUMA VALLEY, CALIF. LOCATION.--Lat 33°20'10", long 116°58'25", in Pauma Grant, San Diego County, on right bank 0.3 mile downstream from unnamed

DRAINAGE AREA.- 11.0 sq mi. PERIOD OF RECORD. --October 1964 to Septemher 1970. GAGE.--Water-st, ge recorder; water-stage recorder and Parshall flume on diversion. Altitude of gage is 1,240 ft (fr >m topographic map). AVERAGE DISCHARGE. --6 years ( creek only) , 4.76 cfs (3,450 acre-ft per year) . 6 years (combined creek and d ive'r - sion), 5.57 .fs (4,040 acr e-ft per year). EXTREMES.- -Max i mums and minimums (discharge in cubic feet per second, g< ge height in feet). Annu al maximum dis charge (*) and peak discharges above base (50 cfs), water years 1966-70 Cre ek only Combined Wtr yr Date Time Discharge G.H. Date Discharge G.H. 1966 Nov. 22 1965 0100 *620 6.12 Nov. 22, 1965 *620 Dec. 29 1965 2300 74 3.62 Dec: 29, 1965 74 - Feb. 6 1966 1800 52 3.36 Feb. 6, 1966 52 - 1967 Dec. 6 1966 2200 *2,100 8.60 Dec. 6, 1966 *2,100 Jan. 25 1967 0030 120 4.06 Jan. 25, 1967 120 Mar. 13 1967 2230 121 3.99 Mar. 19, 1967 121 Apr. 22 1967 0500 72 3.40 Apr. 22, 1967 72 1968 Mar. 8 1968 1200 *80 3.60 Mar. 8, 1968 *80 1969 Jan. 21 1969 1200 53 3.30 Jan. 21, 1969 53 Jan. 25 1969 1315 1,360 7.26 Jan. 25, 1969 1,360 Feb. 6 1969 1830 105 3.56 Feb. 6, 1969 105 Feb. 25 1969 1830 *1,450 7.41 Feb. 25, 1969 *1,450 _ Mar. 21 1969 1730 73 3.29 Mar. 21, 1969 73 Apr. 3 1969 0800 67 3.23 Apr. 3, 1969 67 1970 Mar. 1 1970 1600 »78 3.34 Mar. 1, 1970 *78 " Annual min rs 1966-70 Creek only Combined Wtr yr Date Discharge Date Discharge 1966 Most t f time 0 Many days .10 1967 c 0 Several days .20 1968 c o! 0 Sept. 8, 1968 .21 1969 c 0 Oct. 24, 1968 .47 1970, do. 0 Aug. 9, 1970 .10 Period of record: Maxi mum discharge (creek only), 2,100 cfs Dec. 6, 1966 (gage height, 8.60 ft), fro t at gage height 7.26 ft; no flow f or many days in each year. Maximum discharge (combined flow), 2,100 cfs Dec. 6, 1966; minimum daily, 0.10 cfs at times in most years. REMARKS. --Records good except those for periods of no gage-height record Jan. 26-28, Apr. 3 to May 5, 1969, which are poor. N< regulation above station . Pauma Valley Water Co. diverts from a site 0.2 mile downstream For records c g herein. DISCHARGE. IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 0 5.5 18 6.8 2. .60 2 0 .0 13 7.1 2. .40 3 D .5 12 7.1 2. .40 4 0 .9 10 7.5 2. .40 5 D .9 9.5 6.8 1. .40 6 0 .9 9.1 22 1. .40 7 0 .8 8.6 24 1. .30 8 0 .3 8.2 13 1. .50 9 0 .7 7.7 9.8 1. .60 10 0 1 7.3 9.3 1. .70 11 o .3 7.1 7.9 1. .80 12 0 .1 6.8 7.3 1. .80 13 o .8 6.6 6.9 1. .60 14 o .5 6.4 6.4 1. .50 15 .10 .4 6.2 6.4 1. ) .50 16 .80 .6 6.8 5.8 1. .40 17 5.0 .3 7.5 5.8 1. .30 18 4.8 .1 7.7 5.8 1. .20 19 3.4 .6 7.1 5.6 1. .20 20 1.2 .9 7.1 5.5 1. .10

21 .90 .3 6.6 5.2 1. .10 22 80 1 6.4 5.2 1. .10 23 142 .8 6.2 5.2 1. .10 24 17 .3 6.6 4.8 1. .10 25 29 .3 5.8 5.2 . 0 .10 26 16 .3 5.6 5.2 .80 .10 27 9.3 .9 5.6 5.0 .80 .10 28 7.9 .8 5.8 5.0 .80 .10 29 6.9 2 I 5.5 ... » .70 .10 30 6.0 40 7.3 .60 0 31

TOTAL 0 330.30 287.8 241.2 217.6 12 39.40 10.00 000 MEAN 0 11.0 9 28 7.78 7.77 3 9 1.31 .32 0 0 0 MAX 0 142 40 18 24 2.2 .80 0 0 0 MIN 0 0 J.3 5.5 4.8 .60 0000 AC-FT 0 655 571 478 432 »4 78 20 0 0 0

MTR YR 1966 TOTAL 1.249.20 MEAN 3.42 MAX 142 MIN AC-FT 2.480 SAN LUIS REY RIVER BASIN

11037700 PAUMA CREEK NEAR PAUMA VALLEY, CALIF.--CONTINUED DISCHARGE. IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

NOV DEC JAN FEB MAR APR HAY JUN JUL 1 0 0 9. 3.7 9.8 24 .9 2 0 0 B. 3.B 13 21 .2 ;| 3 0 7.6 7. 3.7 13 20 .6 . 4 0 4.5 6. *.4 18 19 .5 . 5 0 112 6. 5.6 21 IB .5 6 0 656 6. 5.6 14 17 .5 ^ 7 C 50 6. 4.8 13 16 .3 . a l.C 15 6. 4.5 13 15 .2 . 9 .30 10 6. 4.2 12 15 .2 . 10 .1C 9.5 6. 4.1 11 18 .5 11 .10 9.0 6. 6.4 20 15 .5 . 12 0 8.5 6. 6.9 19 14 .5 . 13 0 8.0 6. 36 17 13 .6 « |4 0 7.8 6. 38 19 11 .B . 15 0 7.6 6. 18 20 10 .0 16 0 7.4 5. 14 22 9.8 .7 9 17 0 7.2 5. 12 22 8.6 .5 . 18 0 7.0 5. 12 22 8.4 .2 . 19 0 6.9 5. 11 24 8.2 .1 20 0 6.8 5. 10 22 7.5 .9 I 21 0 6.6 4 4. 9.3 27 .3 .6 . 22 0 6.0 8 4. 9.1 49 .9 .4 23 0 5.8 1 4. B.6 39 .8 .3 !; 24 0 5.5 21 4. B.6 35 .B .0 .2 25 0 5.3 45 4. 8.2 36 .6 .0 .2 26 0 5.3 17 4. 8.2 38 .4 .8 .1 27 0 5.3 14 4. 7.5 35 .4 .6 .1 28 0 5.0 12 3. 9 6.9 30 .4 .5 .1 29 0 4.8 10 ~« 8.8 30 .8 .4 .1 30 0 4.7 9 a 8.4 26 .3 .2 .1 31 4.5 12 9.1 .3 0 TOTAL MEAN 0 .050 32.2 7. 25 5.B I 9.79 23.0 11.7 4 50 .9 MAX 0 1.0 656 »5 9. L 3B 49 24 .9 2. MIN 0 0 02 2 3. B 3.7 9.8 6.4 .2 6

KIN 0 AC-FT 5,770

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TD SEPTEMBER 1968 NOV DEC JAN FEB MAR APR MAY JUN JUL

0 4.1 2.4 .8 1.0 .5 1. 0 2.0 2.2 .0 .90 .9 1. 0 1.9 2.2 .9 .90 .3 1. 0 1.4 2.1 ,5 .70 .9 1. 0 1.2 1.8 .1 .70 .7 1. 0 1.1 1.7 .0 .90 .1 1. 0 1.1 1.7 .0 1.5 .8 1. .40 0 1.2 1.6 .0 29 .6 1. .60 0 1.2 1.7 .9 15 .4 1. .60 0 .90 1.7 .2 9.1 .4 . 0 .90 2.0 .2 7.3 .6 1. 0 .90 2.4 .0 6.2 .9 2. 0 1.4 2.4 .B 5.5 .5 4. 0 1.5 2.4 .7 6.8 .4 2. 0 1.4 2.4 .4 5.5 .2 1. 0 0 0 5.2 1.9 .7 4.2 .7 2 10 1.8 .5 3.4 .5 7.4 5.6 1.7 .1 3.0 .4 . 4.2 3.4 1.8 .1 2.8 .4 .7 3.4 2.8 1.6 .0 2.4 .2 .8 2.8 2.7 1.5 .8 1.9 .9 .8 2.1 2.7 1.5 .7 1.7 .7 .7 2.1 2.7 1.4 .7 1.7 .6 .6 1.7 2.7 1.4 .7 1.6 .5 .5 1.7 2.7 4.5 .2 1.5 .6 .4 2.0 2.7 5.8 .3 1.4 .5 .3 2.8 2.7 2.9 ._ 1.2 .2 .2 31 2.6 3.6 1.2 - .2 TOTAL 68.0 130.30 90.9 MEAN 3.03 MAX 8.9 MIN 1.2 AC-FT 180 CAL YR 1967 TOTAL 2,031.40 MEAN 5.57 MAX 49 MIN 0 AC-FT 4,030 SAN LUIS REY RIVER BASIN

11037700 PAUMA CREEK NEAR PAUMA VALLEY, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEE-T PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

NOV DEC JAN FEB MAR APR MAY JUN JUL

1 0 .02 .80 17 76 21 12 4.0 1.7 .04 2 0 .02 .80 16 63 20 12 3.7 1.4 .02 3 0 .02 .80 15 60 39 11 3.2 1.3 .01 4 0 .02 .46 15 53 25 11 3.1 1.2 0 5 0 .02 .20 22 50 23 10 3.0 1.3 0 6 0 .01 .20 62 48 38 10 2.8 1.4 o 7 0 .01 .16 50 41 25 9.4 2,7 1.4 o 8 0 .01 .12 34 38 23 9.0 2.7 1.1 o 9 0 .01 .12 28 36 21 8.5 2.8 .85 0 1 10 0 .01 .12 23 37 23 8.0 3.0 .72 0 11 0 .01 .12 23 36 20 7.7 3.5 .64 .08 12 0 0 .12 21 36 18 7.3 3.5 .80 .13 13 0 G .20 20 36 18 7.0 3.2 .72 .05 14 0 0 14 18 32 IT 6.5 2.8 .60 .01 15 0 0 6.5 18 33 17 6.3 2.6 .56 .01

16 0 0 2.9 32 32 17 6.0 2.6 .52 .01 17 0 0 1.8 18 31 17 5.6 2.6 .49.46' .01 18 0 0 1.5 19 30 16 5.5 2.2 .01 19 0 0 3.8 19 29 16 5.2 2.0 .42 .01 20 0 .01 18 .01 .01 21 0 .05 29 18 42 15 5.0 2.7 .49 .01 .02 22 0 .06 14 19 47 16 4.9 2.8 .26 .01 .02 23 0 .05 7.9 28 37 15 4.5 2.2 .21 .01 .02 24 .01 .04 84 275 31 15. 4.4 2.1 .17 0 .03 25 .01 .04 455 694 29 15 4.3 2.2 .17 0 .03

26 .02 3.7 193 135 27 14 4.0 2.0 .17 0 .03 27 .02 2.0 96 28 .02 1.3 50 77 25 13 3.7 l.B .15 0 .03 29 .02 1.1 35 24 13 3.6 l.B .11 0 .02 30 .02 .86 23 23 13 3.4 1.9 .08 0 .01 31 .86 20 22 3.4 .07 0 TOTAL 0 .12 10.23 1 ,051.42 1,824 MEAN 0 .004 .33 33.9 65.1 37.4 19.1 6.72 2.64 .65 .014 .008 MAX 0 .02 3.7 4S5 694 76 39 12 4.0 1.7 .13 .03 MIN 0 0 0 .12 15 22 13 3.4 1.8 .07 0 0 2,300 1,130 413 157 40 .9 .5

CAL YR 1968 TOTAL 406.75 MEAN 1.11 MAX 29 MIN 0 AC-FT 807

DISCHARGE , IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 DAY OCT NDV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 .01 .01 .02 2 .01 .01 .02 .07 .34 6.6 1.1 .23 .30 .01 .02 .04 3 .02 .01 .02 .07 .19 9.1 .80 .17 .34 .01 .02 .04 4 .02 .01 .02 .O'T.07 .15 11 .64 .13 .22 .01 .02 .04 5 .01 .01 .02 .13 14 .56 .13 .13 .01 .02 .04 6 0 .02 .02 .08 .10 10 .49 .11 .17 .01 .01 .04 7 .01 2.4 .02 .10 .08 8.0 .42 .13 .15 0 0 .03 8 0 1.7 .02 .10 .06 6.4 .42 .15 .06 0 0 .03 9 0 1.3 .47 .10 .06 5.3 .36 .15 .04 0 0 .02 10 0 1.5 .31 1.2 2.0 5.8 .28 .15 .04 0 0 .02 11 .01 1.4 .15 1. 4.5 5.8 .21 .13 .04 0 0 .01 12 .01 .68 .11 2. 2.5 4.5 .23 .11 .04 0 .01 .01 13 0 .31 .07 2. 1.4 3.9 .19 .10 .04 0 .03 .01 14 .01 .28 .05 1. 1.2 3.6 .21 .10 .04 0- .01 .01 15 .01 .36 .05 1. 1.0 3.3 .23 .08 .04 0 .01 .01 16 .02 .56 .04 1.4 .85 2.7 .21 .07 .04 0 .01 .01 17 .02 .49 .04 1.9 .76 2.2 .34 .06 .04 0 .02 .01 18 .03 .26 .04 1.4 .72 2.2 .36 .05 .04 0 .03 .01 19 .04 .19 .04 1.2 .64 2.0 .31 .04 .04 0 .05 .01 20 ' .04

21 .04 .15 .04 1.0 .56 .8 .63 .04 .04 1 .02 .07 .02 22 .04 .17 .04 1.0 .56 .8 .46 .04 .04 .03 .07 .02 23 .04 .07 24 .04 .11 .23 .04 .04 .03 .07 25 .04 .07 .05 .85 .60 .4 .19 .04 .04 .03 .07 .04- 26 .04 .05 .06 .80 .68 1.3 .17 .04 .03 .06 27 .05 .02 .06 .68 .68 1.4 .58 .04 .03 .03 .06 28 .05 .02 .06 .68 7.0 1.4 .89 .04 .02 .03 .06 29 .05 .02 .07 .64 _ 1.4 .94 .04 .02 .03 .05 30 .03 .02 .07 .60 _w«. 1.0 .80 .04 .02 .03 .05 31 .03 .07 .56 1.6 .04 ' .03 .04 TOTAL .72 12.51 2.19 26.87 29.00 139.8 14.03 3.03 2.22 .40 1.02 .49 MEAN .023 .42 .071 .87 1.04 4.51 .47 .098 .074 .013 .033 .016 MAX .05 2.4 .47 2.5 7.0 15 1.1 .46 .34 .03 .07 .04 MIN 0 .01 .02 .07 .06 1.0 .17 .04 .02 0 0 0 AC-FT 1.4 25 4.3 53 58 277 28 6.0 4.4 .B 2.0 1.0 CAL YR 1969 TOTAL 4,930.09 MEAN 13.5 MAX 694 MIN 0 AC-FT 9,780 WTR YR 1970 TOTAL 232.28 MEAN .64 MAX 15 MIN 0 AC-FT 461 SAN LUIS REY RIVER BASIN

11037700 PAUMA CREEK NEAR PAUMA VALLEY, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF PAUMA CREEK AMI PAUMA VALLEY WATER CO.,'S DIVERSION NEAR PAUMA VALLEY, CALIF., WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

JUN JUL AUG SEP

1 .20 .30 5.9 18 7.4 5.1 3.3 2.2 1.1 .40 .10 .10 2 .20 .30 5.2 14 7.7 6.1 3.1 2.0 1.1 .30 .10 .10 3 .20 .30 4.8 12 7.7 5.8 3.1 2.0 1.0 .30 .10 .10 4 .20 .30 4.4 11 8.1 5.8 3.1 2.0 1.0 .30 .10 .10 5 .20 .30 4.4 10 7.4 5.9 3.1 2.0 .90 .30 .10 .10 6 .20 .30 4.4 9 a 22 6.1 3.0 2.0 .90 .20 .10 .10 7 .20 .30 4.5 9 3 24 5.7 3.0 1.9 .90 .20 .10 .10 a .20 .40 4.3 8 9 14 5.2 3.0 2.0 1.1 .20 .10 .10 9 .30 .40 9.5 8 3 10 5.2 3.0 2.1 1.4 .30 .10 .10 10 .30 .40 16 7 9 9.8 5.1 3.0 2.2 1.3 .30 .10 .10 11 .30 .40 9.7 7 7 8. 2 5.0 3.0 2.3 .90 .30 .10 .10 12 .20 .40 .90 .20 .10 .10 13 .20 .40 10 7 2 7.2 4.7 3.0 2.0 .80 .20 .10 .10 14 .30 .70 .20 .10 .10 15 .30 .90 8.8 6 a 6.7 4.6 2.6 1.9 .70 .20 .10 .10 16 .30 1.2 IT .30 .70 .10 .10 .10 18 .30 4.9 7.5 7 9 6.1 3.9 2.8 i.a .60 .10 .10 .10 19 .30 3.5 7.0 7 3 5.9 3.8 3.3 1.8 .60 .10 .10 .10 20 .30 1.3 7.4 7 3 5.8 3.8 3.2 1.7 .60 .10 .10 .20 21 .60 .10 .10 .10 22 .10 80 12 6 5 5.5 3.8 2.7 1.6 .60 .10 .10 .10 23 .10 142 9.4 6 3 5.5 3.6 2.6 1.6 .60 .10 .10 .10 24 .10 IT 7.9 6 6 5.1 6.2 2.3 1.5 .60 .10 .10 .10 25 .10 29 .60 .10 .10 .10

26 .10 16 7.9 6 3 5.5 5.5 2.4 1.4 .50 .10 .10 .10 27 .20 .50 .10 .10 .10 28 .20 .40 .10 .10 .10 29 .20 7.3 22 6 2 ___ _ 3.9 2.3 1.3 .40 .20 .10 .10 30 .20 6.4 40 8 0 3.8 2.2 1.1 .40 .20 .10 .20 31 .20 ----- 22 7 7 _____ 3.3 1.1 .20 .10 - TOTAL 6.70 339.00 301.9 256 1 227.7 148.4 84.0 55.3 23.10 5.90 3.10 3.20 MEAN .22 11.3 9.74 8. >6 8. 13 4.79 2.80 1.78 .77 .19 .10 .11 MAX .30 142 40 18 24 6.2 3.3 2.3 1.4 .40 .10 .20 MIN .10 .30 4.3 6 2 5.1 3.3 2.2 1.1 .40 .10 .10 .10 AC -FT 13 672 599 508 452 294 167 110 46 12 6.2 6.4 2,750

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF PAUMA CREEK AND PAUMA VALLEY WATER CO.,'S DIVERSION NEAR PAUMA VALLEY, CALIF., WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

OAV OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .20 .20 .50 9.4 5. 10 24 g 9 3.1 1.3 .80 2 .20 20 .50 8.7 5. 13 22 3 .20 .20 8.1 8.5 5. 13 22 a. 2.8 .2 .9 4 .30 .20 4.6 8.5 a. 18 21 jf 2.7 .2 .6 5 .30 .30 112 8.2 7. 22 20 ' 1 1 2.6 .2 .2

6 .30 .30 656 7.6 7. 15 19 7 B 2.5 .2 .0 7 .30 .80 50 7.3 6. 14 18 7, 2.4 .2 .0 8 .20 1.8 15 7.3 6. 14 17 7. 2.3 .2 .90 9 .20 .70 10 7.3 6. 13 17 7. 2.2 .1 .90 10 .60 .50 9.5 7.3 6. 12 20 7. 2.1 .1 .90 11 .40 .70 9.0 6.9 a. 20 17 7. 2.0 .1 .90 12 .40 .60 8.5 6.7 8. 19 16 7. 2.0 .1 .90 13 .40 .50 a.o 6.9 38 17 15 9. 1.9 .1 .90 14 .30 .50 8.2 6.6 38 20 13 a. 1.8 .1 .90 15 .30 .50 8.2 6.5 18 20 12 7. 1.7 . .0 .80 16 .30 .50 8.0 6.5 14 22 12 7. 1.7 .0 .80 17 .20 .50 7.8 6.3 12 22 11 6. 1.6 .0 .90 18 .20 .50 7.6 6.3 12 22 11 6. 1.6 .0 .0 19 .20 .40 7.5 6.2 11 24 11 5. 1.5 .0 .0 20 .20 .40 7.4 6.6 10 22 9.9 5^ 1.5 .0 .0 21 .20 .50 7.2 4 22 .20 .50 6.6 a 23 .20 .50 24 .20 .50 6.1 21 6.2 9.0 35 9. 1.4 .90 .0 25 .20 .50 5.9 45 6.0 a. 7 36 4. 1.4 .80 .0 26 .20 .50 5.9 17 6.0 8.7 38 8. 4. 1.4 .80 1.0 27 .20 .40 5.9 14 6.0 9.1 35 8. 3. 1.4. .80 .90 28 .20 .40 5.6 12 5.7 a. 6 30 a. 3. 1.3 .80 .90 29 .20 .50 5.4 10 ______9.6 30 9. 3. 1.3 .70 .90 30 .20 .50 5.1 9 g __ __ 9.1 26 9. 3. 1.3 .70 .80 31 .20 5.0 12 ______9.5 _____ 9. 1.3 .70 TOTAL 7.90 15.10 1.011.50 262 7 194.7 336.2 697 428. 193. 58.2 31. 4O 29.90 MEAN .25 .50 32.6 8.' 7 6.95 10.8 23.2 13. 6.4 1.88 1.01 1.00 MAX .60 1.8 656 <.5 9.4 38 49 2 9.3 3.1 1.3 1.9 KIN .20 .20 .50 3 9 5.7 5.6 10 8. 3.2 1.3 .70 .80 AC-FT 16 30 2,010 521 386 667 1,380 850 383 115 62 59

CAL VR 1966 TOTAL 1,841 .30 MEAN 5.04 MX 656 MIN .10 AC-FT 3,650 HTR VR 1967 TOTAL 3,266 .10 MEAN 8. 95 MAX 656 N1N .20 AC-FT 6,480 SAN LUIS REY RIVER BASIN

11037700 PAUMA CREEK NEAR PAUMA VALLEY, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND. OF PAUMA CREEK AND PAUMA VALLEY WATER CO.,'S DIVERSION NEAR PAUMA VALLEY, CALIF., WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY OCT NOV DEC JAN FES MAR APR MAY JUN JUL AUG SEP 1 .80 .68 5. 1 3.4 5.1 2.6 2.9 3.2 1.6 .94 .59 .37 2 .BO .72 3.0 3.2 4.3 2.5 10 3.2 1.5 .88 .53 .38 3 .80 .48 .41 4 .80 .79 2.4 3.1 3.8 2.3 7.2 3.3 1.3 .80 .46 .47 5 .80 .68 2.2 2.8 3.4 2.3 5.4 3.2 1.4 .77 .46 .42 6 .80 .47 .31 7 .80 .90 2.0 2.7 3.3 3.1 4.7 3.2 1.9 1.2 .47 .24 8 .80 .S4 2.1 2.6 3.3 30 4.4 3.1 2.1 1.2 .48 .21 9 .SO .83 2. I 2.7 3.2 15 4.2 2.4 2.1 .87 .44 .22 10 .80 .85 1. 8 2.7 3.6 9.3 4.2 2.4 2.0 .76 .41 .22 11 .80 .82 1. .41 .22 12 .72 .82 1. .41 .22 13 .72 1.6 .66 .41 .22 14 .72 .46 .36 19 .68 .90 2.2 3.4 4.8 5.8 4.3 3.0 1.3 .73 .50 .43 16 .63 .56 .43 17 .62 .96 3.5 3.2 4.0 5.3 4.7 2.5 1.1 .69 .57 .42 18 .62 .99 6.0 3.2 4.0 5.0 4.8 2.4 1.0 .64 .59 .42 19 .64 12 11 3.0 .57 .43 20 .66 .93 .60 .57 .43

21 .74 .94 .56 .58 .43 22 .82 .95 .53 .57 .43 23 .79 2.9 3.5 2.8 '2.83.0 3.5 4.0 2.3 .96 .53 .47 .41 24 .77 2.2 3.5 2.8 3.2 3.S 2.2 1.0 .53 .39 .33 25 .76 2.1 .98 .54 .38 .26 26 .78 1.8 3.8 2.7 2.7 3.1 3.6 2.0 .94 .54 .36 .23 27 .80 1.8 3. 9 5.8 2.7 3.0 3.7 .9 .95 .54 .37 .22 28 .81 2.1 3. 7 7.1 3.0 2.9 3.6 .8 .96 .64 .36 .36 29 .78 2.6 3. r 4.9 2.8 2.8 3.3 .7 .97 .72 .34 .43 30 .63 3.9 3. 7 4.2 _«« __ 2.7 3.2 .6 .95 .64 .34 .43 31 .65 - 3.6 4.9 2.6 »_ .7

106.7 163.5 82.0 39.06 22.25 14.35 10.36 MEAN .75 2.08 3.42 3.40 3.68 5.27 4.63 2.65 1.30 .72 .46 .35 MAX .82 12 11 7.1 6.1 30 10 4.7 2.1 1.2 .59 .47 HIN .62 .68 1. 9 2.6 2.7 2.3 2.9 1.6 .93 .53 .34 .21 AC-FT 46 124 210 209 212 324 276 163 77 44 28 21 CAL YR 1967 TOTAL 2.423.05 MEAN 6.64 MAX 49 MIN .62 AC-FT 4 .810 MTR YR 1968 TOTAL 873.87 MEAN 2.39 MAX 30 HIN .21 AC-FT 1 ,730

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF PAUMA CREEK AND PAUMA VALLEY WATER CO. ,'5 DIVERSION NEAR PAUMA VALLEY, CALIF., WATER YEAR OCTOBER 1968 TO SEPTEH BER 1969

JUN JUL AUG SEP

1 .62 .79 .86 .97 17 76 22 14 5.6 3.9 .2 .62 2 .71 .75 .96 .97 16 63 21 14 4.8 3.6 .2 .57 3 .96 .71 .86 .97 15 60 40 13 5.0 3.5 .1 .55 4 .95 .75 .77 .96 15 53 26 13 5.0 3.4 .1 .55 5 .77 .81 .78 1.0 22 50 23 12 4.9 3.5 .1 .54

6 .53 .75 .77 .3 63 48 38 12 4.7 3.6 .1 .55 7 .54 .69 .76 .3 51 41 25 12 4.6 3.6 .1 .54 8 .68 .66 .75 .1 34 38 23 11 4.6 3.3 .1 .54 9 .69 .64 .75 .1 28 37 22 11 4.7 3.0 .3 .54 10 .67 .63 .76 .1 24 38 24 10 4.9 2.9 .0 .54 11 .72 .61 .86 .1 24 37 21 10 5.4 2.9 .77 .51 12 .65 .66 .96 .1 22 37 19 9.5 5.4 3.2 .0 .54 13 .54 .81 .91 .2 21 37 19 9.2 5.1 2.9 .0 .57 14 .77 .89 .81 1 19 33 18 8.7 4.7 2.8 .0 .69 IS 1.0 1.4 .80 .3 19 34 18 8.5 4.5 2.8 .99 .«3 16 .73 1.2 .7 33 33 18 17 .55 1.0 .6 18 32 18 7.8 4.5 2.7 .95 .86 18 .53 .87 .3 19 31 17 T.7 4.1 2.6 .95 .82 19 .53 .75 .6 19 30 17 7.4 3.9 2.4 .93 .75 20 .54 .70 1 18 30 17 7.3 3.7 2.5 .88 .79 21 .56 .68 29 18 43 16 7.2 4.0 2.5 .79 .93 22 .51 .71 14 19 47 17 7.1 3.6 2.1 .72 .98 23 .49 .71 8.1 28 37 16 6.7 3.4 1.8 .65 .87 24 .47 .71 84 275 31 16 6.6 3.8 1.6 .64 .80 25 .46 .74 455 694 29 17 6.5 4.1 1.5 .67 .76 26 .4B .74 193 135 27 16 6.2 3.9 1.6 .65 .73 2T .49 .75 96 90 26 15 6.1 3.9 1.6 .68 .69 29 .51 .75 50 77 25 15 5.9 3.9 1.6 .69 .61 29 .53 .73 35 . 24 IS 5.8 4.0 1.4 .70 .57 30 .83 .76 23 « 23 15 5.6 4.1 1.4 .68 .55 31 .86 . 20 23 ______5.6 1.4 , 66 _____ TOTAL 19.89 23.35 35.T6 1.067.77 1.833 1.173 604 275.6 133.3 80.3 2E .28 20.28 MEAN .64 .78 1.15 34.4 65.5 3T.8 20.1 8.89 4.44 2.59 .91 .68 MAX 1.0 1.4 4.3 455 694 76 40 14 5.6 3.9 1.3 .98 HIN .47 .61 .75 .96 15 23 15 5.6 3.4 1.4 .64 .51 »C-FT 39 46 71 2.120 3,640 2.330 1.200 547 264 159 56 40 CAL YR 1968 TOTAL 761.42 MEAN 2.08 MAX 30 HIN .21 AC-FT 1,510 HTR YR 1969 TOTAL AC-FT 10.500 SAN LUIS REY RIVER BASIN

11037700 PAUMA CREEK NEAR PAUMA VALLEY, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF PAUMA CREEK AND PAUMA VALLEY WATER CO. "S DIVERSION NEAR PAUMA VALLEY, CALIF., WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

1 .55 .76 .1 1.4 IS .4 .1 2 .66 .76 .1 1.5 6. .4 .1 3 .80 .61 .1 1.5 9. .1 .1 4 .80 .84 .1 1.6 11 .9 .1 5 .68 1.0 .0 1.5 14 .9 .1

6 .62 .1 .0 1.5 10 .9 .1 7 .60 .9 .0 1.4 8. .8 .1 8 .59 .1 .0 1.5 6. .8 .1 9 .60 .7 .0 1.5 5. .8 .1 10 .70 .8 .1 3.0 6. .7 .1

11 .77 .7 .4 4.8 6. .6 .1 -40 12 .70 .5 .6 3.5 4. .6 .0 .36 13 .69 .5 .2 2.7 4. .6 .0 .34 1* .75 .4 .3 2.4 4. .6 .0 15 .84 .6 .2 2.2 3. .6 .0

16 .91 .9 .2 2.0 3. .6 .0 17 .98 .8 .8 2.0 3. .6 .0 18 1.1 .4 .3 1.9 3. .7 .94 19 .1 .3 .1 1.9 3. .7 .90 .32 20 .2 .3 .0 1.9 2. .5 .80 .32

21 .0 .2 .9 1.8 2. .8 .73 22 .1 .3 .9 1.7 2. .8 .69 23 .1 .3 .9 1.8 2. .6 .64 24 .1 .2 .8 1.6 2. .5 .58 25 .1 .2 .8 1.7 2. .5 .53

26 .1 .2 .7 1.7 2. .5 .49 27 .0 .2 .6 1.7 2. .0 .47 28 .98 .2 .6 7.5 2. .4 .47 29 .92 .2 5 2. .4 .51 30 .78 .2 .4 2. .3 .55

TOTAL 26.60 4 .39 3 5 .1 61.2 159. 5 .6 4 26.40 MEAN .86 .38 1 I 1 71 2.19 5.1 j 82 1 .88 MAX 1.2 2.9 .8 7.5 1 .4 1.1 PIN .55 .76 .0 1.4 2. .5 .47 AC-fT 53 82 78 05 121 31 108 82 52 SAN LUIS REV RIVER BASIN

11039100 SAN LUIS REY RIVER TRIBUTARY NEAR PALA, CALIF. LOCATION.--Lat 33°21'45", long 117°02'55", in SWisNWsSWis sec.25, T.9 S. , R.2 W., San Diego County,

DRAINAGE AREA.--1.01 sq mi. PERIOD OF RECORD.--Annual maximums, water years 1962-65. October 1965 to September 1970.

(from topographic map). Dec. 8, 1961, to Sept. 20, 1965, crest-stage gage only at pr AVERAGE DISCHARGE.--5 years (1965-70), 0.008 cfs (5.8 acre-ft per year). EXTREMES.--Maximums and min 1966-70 are contained iti

Wtr Yr Date Discharge G.H. Discharge 1966 Nov. 22, 1965 25 16.77 of ye 1967 Dec. 6, 1966 6.9 15.52 1968 Mar. 8, 1968 6.8 15.85 do! 1969 Feb. 25, 1969 15.95 do. 1970 Mar. 2, 1970 15.24 do. aximum discharge, 25 cfs Nov. 22, 1965 (gage height, 16.77 ft), from rating curve defined by computati of flow through culvert at gage heights 15.12, 15.58, 15.70, and 16.38 ft; no flo most of year. REMARKS.--Re

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1970

NOV. 22, 1965.... 2.1 JAN. 25, 1967.... .20 DEC 8, 1967.. 10 FEB. 22, 1969.... .03 23...... 1.1 MAR. 13...... 20 9. 20 .08 DEC. 5, 1966.... .80 14...... 20 MAR 8, 1968.. .20 ...... 25 1.5 APR. 2...... 20 JAN ' 1969.. .03 ..... 3.5 .70 11...... 10 , 1 .0 ...... 48 JAN. 22, 1967... .40 22~...... 30 .01 0.... .03 .40 23...... 10 .02 ...... 08 .60 NOV. 21...... 40 .05 ...... 05 CFS-BAYS MAXIMUM RUNOFF IN ACRE-FEET 3 2 2. 1 6.4 3 2 2. 1 6.4 3 00 1. 5 3 00 1. 5

JANUARY 1967.. 1 60 60 .052 MARCH...... 40 20 .013 APRIL...... 70 30 .023 WTR YR 1967. 5 70 1. 5 .016 NOVEMBER 1967. 40 40 .013 DECEMBER...... 30 20 .010 CAL YR 1967. 3 40 60 .0090

MARCH 1968.... 20 20 .007 WTR YR 1968. 90 40 .0030 CAL YR 1968. 20 20 .0005 JANUARY 1969.. 1 04 1. 0 .034 FEBRUARY...... 4 41 3. 5 .16 WTR YR 1969. 5 45 3. 5 .015 CAL YR 1969. 5 45 3. 5 .015

NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. SAN LUIS REY RIVER BASIN

11040000 SAN LUIS REY RIVER AT MONSERATE NARROWS, NEAR PALA, CALIF. o County,

DRAINAGE AREA.--373 sq mi. PERIOD OF RECORD.--December 1935 to March 1938 (fragmentary), April 1938 to November 1941, October 1946 to September 1970. GAGE.--Water-stage recorder. Datum of gage is 270.82 ft above mean sea level (levels by State of California). Piior to October 1946, at same site at different datum and Oct. 22, 1946, to Nov. 30, 1954, at datum 1.0 ft higher. AVERAGE DISCHARGE.--27 years (1938-41, 1946-70), 7.49 cfs (5,430 acre-ft per year); median of yearly mean dis­ charges, 1.8 cfs (1,300 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water years 1966-70 are contained in the following table: Maximum Minimum Wtr yr Date Discharge G.H. Date Discharge 1966 Nov. 23, 1965 2,850 4.80 Most of time 0 1967 Dec. 6, 1966 7,000 6.70 do. C 1968 Mar. 8, 1968 131 2.47 do. 0 1969 Feb. 25, 1969 3,250 7.26 do. 0 1970 Mar. 2, 1970 111 4.82 do. C

Period of record: Maximum gage height, 8.7 ft Feb. 7, 1937, datum then in use (discharge not determined); maximum discharge, 7,000 cfs Dec. 6, 1966 (gage height, 6.70 ft); no flow at times in most years.

REMARKS.--Records good except those for Dec. 6-8, 1966, which are poor. No gage-height record Dec. 7, 8, 1966. Flow regulated by Lake Henshaw (see station 11035000). Several diversions above station.

COOPERATION.--One discharge measurement furnished by San Diego County Flood Control District. REVISIONS.--WSP 1928: Drainage area.

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

CAV OCT NOV DEC JUN JIM. AUG SEP

1 0 0 0 .10 .70 2 0 0 0 1.0 .70 I C 0 0 .50 .60 4 0 0 0 .50 .50 5 0 0 0 .50 .50 6 0 0 2.2 .50 .40 7 0 0 12 .50 .40 S 0 0 1.0 .50 .40 9 0 0 .50 .50 .40 10 0 0 .50 .50 .40 11 0 0 .40 .40 .40 12 0 0 .40 .40 .30 13 0 0 .40 .40 .30 14 0 0 .40 .40 .30 15 0 0 .40 .40 .30 16 0 0 .30 .30 .30 17 0 0 .30 .30 .20 IB 0 0 .30 .30 .20 19 0 0 .30 .30 .20 20 0 0 .30 .30 .10

21 0 0 .20 .30 0 22 0 0 .20 .30 0 23 705 0 .20 .30 0 24 .90 0 .20 1.0 0 25 0 0 .10 2.0 0 26 0 0 .10 1.1 0 27 0 0 .10 1.1 0 28 0 0 .10 1.0 0 29 0 0 .90 0 30 0 36 __~ __ .90 0 31 _____ 3.7 _____ .80 _____ TOTAL 0 705.90 39.7 0 20.90 18.30 7.60 0 MEAN 0 23.5 1.28 0 .75 .59 .25 0 MAX 0 705 36 0 12 2.0 .70 0 MIN 0 0 0 0 0 .10 0 0 AC -FT 0 1.400 79 0 41 36 15 0 SAN LUIS KEY RIVER BASIN

11040000 SAN LUIS REY RIVER AT MONSERATE NARROWS, NEAR PALA, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FFET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

OCT 10V DEC JUN JUL

0 0 .90 1.1 .90 1.6 .50 .10 0 0 .90 1.1 .70 1.6 .50 .10 0 0 .60 1.1 .60 1.5 .50 .10 0 0 .70 1.2 .80 1.3 .50 .10 668 0 .70 .90 .50 1.1 .40 .10

1,890 0 .90 .80 .50 1.1 .40 .10 96C 0 1.0 .80 .50 .70 .40 .10 .20 0 1.0 .80 .50 .80 .40 .10 0 0 l.C .70 .40 .90 .30 .10 0 0 1.0 .80 .40 1.0 .30 .10

0 0 .90 .80 20 .90 .30 .10 0 0 .90 .90 4.0 .90 .30 .10 0 0 1.1 4.1 2.5 .80 .30 .10 0 0 1.1 15 2.2 .70 .30 .10 0 0 1.1 .40 1.3 .70 .30 .10

0 0 1.3 .50 V.3 .70 .30 .10 0 0 1.3 .50 1.3 .70 .30 .10 0 0 1.2 .50 I."8 .60 .20 .10 0 0 1.2 .50 3.4 .50 .20 .10 0 0 1.2 .50 2.0 .40 .20 .10

0 0 1.1 .50 2.5 .40 .20 .10 0 0 1.1 .50 18 .40 .20 .10 0 0 1.1 .50 9.0 .40 .20 .10 0 B.2 1.1 .50 7.0 .40 .20 .10 0 85 1.1 .50 4.2 .40 .20 .10

0 3.4 1.1 .70 6.7 .40 .20 .10 0 1.7 1.1 .70 6.7 .40 .20 .10 0 1.3 1.1 .60 4.2 .40 .20 .10 0 1.0 s - .60 2.7 .50 .20 .10 0 1.1 .60 2.0 .60 .20 .10 31 0 1.1 .80 .60 0

TOTAL 0 0 3, 51B. 20 102.8 28.80 39.50 108.60 23.40 8.90 3.00 MEAN 0 0 113 3.32 1.03 1.27 3.62 .75 .30 .097 MAX 0 0 1,890 85 1.3 15 20 1.6 .50 .10 MIN 0 0 0 0 .60 .40 .40 .40 .20 0 AC-FT 0 0 6,980 204 57 78 215 46 IB 6.0

CAL YR 1966 TO! 565 .00 MEAN 9.77 MAX 1,890 MIN 0 AC-FT 7,070 NTR YR 1967 TOTAL 3,833.20833.20 MEAN 10.5 MAX 1,890 MIN 0 AC-FT 7,600

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1967 TO SEPTEMBER 196B

NOV DEC JAN FEB MAR APR MAY JUN JUL 1 3 0 .20 .50 .30 .10 2 0 0 .20 .50 .30 .40 3 0 0 .20 .50 .20 .30 4 0 0 .20 .50 .20 .20 5 c 0 .20 .50 .20 .20 6 0 0 .20 .50 .20 .20 7 0 0 .30 .50 .20 .20 8 0 0 .30 .50 28 .20 9 c 0 .30 .50 13 .20 10 0 0 .40 .50 1.7 .10 11 0 0 .40 .50 1.0 .10 12 0 0 .40 .50 .90 .10 13 0 0 .40 .50 .90 0 14 0 0 .40 .50 .90 0 15 0 0 .40 .50 .BO 0 16 0 0 .40 .40 .70 0 17 0 c .40 .40 .80 0 18 0 4.2 .40 .40 .BO 0 19 0 20 .40 .40 .70 0 20 4.0 .50 .40 .40 .60 0 21 3.7 .40 .40 .40 .56 0 22 .80 .40 .40 .40 .50 0 23 0 .40 .40 .40 .50 0 24 0 .40 .40 .30 .40 0 25 0 .40 .40 .30 .30 0 26 0 .30 .40 .30 .40 0 27 0 .30 .40 .30 .30 0 28 0 .30 .40 .30 .20 0 29 0 .30 .50 .30 .20 0 30 0 .30 .50 .20 0 31 .30 .50 .10 TOTAL 0 8.50 28.50 11.20 12.50 56.00 2.30 MEAN 0 .28 .92 .36 .43 1.81 .077 MAX 0 4.0 20 .50 .50 28 .40 MIN 0 C 0 .20 .30 .10 0 AC-FT 0 17 57 22 25 111 4.6

WTR YR 196B TOTAL 119.00 MEAN .33 MAX 28 MIN 0 AC-FT 236 SAN LUIS REY RIVER BASIN

11040000 SAN LUIS REY RIVER AT MONSERATE NARROWS, NEAR PALA, CALIF. --CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

DAY OCT NDV DEC JAN FEB MAR APR MY JUN JUL

1 0 19 135 16 2.6 .35 .15 2 0 10 113 16 2.3 .35 .10 3 0 10 113 18 2.3 .43 .05 * 0 9.5 96 16 2.6 .27 .05 5 0 11 94 16 3.1 .35 .05

6 0 53 SB 16 2-8 .43 .10 7 0 70 76 14 2.3 .35 .10 a 0 22 72 14 1.8 .27 .15 9 0 17 68 13 1.6 .35 .21 10 0 16 67 12 1.4 .43 .21

11 0 14 54 12 1.2 .43 .10 12 0 13 45 12 1.1 .43 .05 13 0 13 41 10 1.1 .43 .05 14 0 11 37 9.5 1.0 .35 0 15 0 10 28 8.6 1.0 .35 0

16 0 12 20 8.2 .85 .43 0 17 0 11 16 7.9 .73 .43 0 ia 0 15 16 7.5 .63 .43 0 19 0 20 16 7.2 .63 .43 0 20 0 IB 14 6.2 .63 .35 0

21 0 15 17 5.6 .63 .35 0 22 0 29 20 5.6 .63 .35 0 23 0 30 19 4.9 .63 .43 0 2* 19 654 17 4.9 .53 .53 0 25 836 1,780 17 4.4 .53 .53 0

26 241 782 17 4.1 .53 .53 0 27 109 149 17 3.9 .53 .35 0 28 22 141 29 14 14 3.6 .43 .21 0 30 12 16 3.1 .53 .15 0 31 10 15 .35 0

TOTAL 0 0 C 1,263 1.37 MEAN 000 4D.7 141 44.9 9.46 1.21 .38 .044 MAX 0 C 0 836 1,780 135 18 3.1 .53 .21 PIN 0000 9.5 14 - 3.1 .35 .15 0 AC-FT 000 2,510 2.7

KIN 0 AC-FT 163

DISCHARGE, IN CUBIC FEET PER SECOND , WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

DAY JUN JUL

1 0 .85 18 .98 .35 2 0 .85 53 .98 .27 3 0 .85 11 .98 .27 4 0 .98 6.6 .73 .15 5 0 .85 11 .63 .15

6 0 . B5 4.9 .73 . 5 7 0 .98 4.1 .63 . 5 8 0 1.1 4.1 .53 . 5 9 0 1.1 4.1 .43 . 5 10 0 2.3 3.9 .35 . 5

11 .23 4.4 3.6 .27 .15 12 .85 3.3 3.3 .27 .15 13 .85 3.1 3.3 .27 .15 14 .85 2.6 3.3 .21 .15 15 .85 2.3 2.B .21 .15

16 .85 1.9 2.3 .21 .10 17 1. 1.8 2.1 .21 .10 18 1. 1.8 2.1 .21 .05 19 1. 1.4 1.8 .10 .10 20 1. 1.2 1.4 .15 .05

21 1. 1.1 1.4 .21 .03 22 . 8 1.1 1.4 .15 0 23 1. 1.1 1.2 .15 0 24 1. 1.1 1.1 .15 0 25 1. 1.1 1.1 .21 0

26 1. 1.1 1.2 .21 0 27 1. 1.1 1.1 .53 0 28 1. 3.9 .98 .43 0 29 .85 .98 .43 0 30 .85 1.1 .43 0 31 .85 1.1 0

3.12 0 0 MEAN 0 0 0 .65 1.65 5.14 .40 .10 0 0 MAX 0 0 0 1.1 4.4 53 .98 .35 0 0 MIN 0000 .85 .98 .10 0 0 0 AC-FT 0 0 0 40 91 316 24 6.2 0 0

13,760 SAN LUIS KEY RIVER BASIN

11041000 SAN LUIS KEY RIVER NEAR BONSALL, CALIF. LOCATION.--Lat 33°15'13", long 117°14'48", in SW^NE^EH sec.l, T.ll S. , R.4 W. , San Diego County, on left bank 0.7 mile downstream from bridge on State Highway 76 and 2.8 miles southwest of Bonsall. DRAINAGE AREA.--5I3 sq mi (revised). PERIOD OF RECORD.--July 1916 to September 1918 (gage heights :d dis rge measurements only), October 1929 to September 1970. GAGE.--Water-stage recorder. Datum of gage i 108.10 ft above mean level. See WSP 1928 for history of changes prior to Sept. 17, 1946. AVERAGE DISCHARGE.--41 years (1929-70), 18.6 s (13,480 acre-ft per ar) ; median of yearly mean discharges, 4.1 cfs (3,000 acre-ft per year). EXTREMES.--Maximums and minimums Xdischarge in cubic feet per econd, gage height in feet) fo the wat£ 1966-70 are contained in the following table: Minimu Wtr yi Discharge G.H. Date 1966 Nov. 23 1965 2,650 9.63 Most of year 1967 Dec. 7 1966 6,080 10.84 Long periods 1968 Mar. 8 1968 485 6.40 do. 1969 Feb. 25 7,700 11.43 Oct. 1 to Nov. 14, 1968 1970 Mar. 1970 374 a7,92 Sept,30, 1970 a From floodt Period of record: Maximum discharge, 18,100 cfs Mar. 3, 1938 (gage height, 16.04 ft, present datum), from rating curve extended above 2,400 cfs; no flow for part of each year. REMARKS.--Records poor prior to Mar. 6, 1970, and good thereafter. Flow regulated by Lake Henshaw (capacity, 194,300 acre-ft). Several diversions above station. REVISIONS (WATER YEARS).--WSP 881: 1938.

DISCHARGE, IN CUBIC FEET .PER SECOND, MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY

1 0 .0 .0 .5 .8 2.0 .20 2 0 ,0 .0 .0 .1 1.9 .10 3 0 .0 ^5 .0 .6 1.9 .20

11041000 SAN LUIS REY RIVER NEAR BONSALL, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 0 4.0 i .4 7.0 8 .8 .30 2 0 4.0 .9 7.5 . .30 3 0 4.0 .7 8.0 . .30 4 0 4.0 . 5 7.5 .30 5 286 .30 6 1, 500 4.0 .7 7.0 .30 T 1, 540 4.0 .5 5.5 .20 8 45 4.0 .2 5.5 .20 9 30 4.0 8 3.5 . .20 10 20 4.0 .5 2.6 .20 11 20 4.0 .5 59 .20 12 12 4.0 .5 33 . .20 13 8.0 4.5 .5 1 16 . .20 14 7.5 4.0 .2 2 13 . .20 15 7.0 4.0 .2 4 10 . 0 .20 16 6.5 4.0 .2 1 9. .90 .20 17 6.0 4.0 .2 .0 8. .90 .10 18 5.8 4.0 .2 .6 8. .80 .10 19 5.6 4.0 .2 .3 8. .80 .10 20 5.5 4.0 .2 .0 8. .70 .10 21 5.4 4.0 .0 .9 8. .70 .10 22 5.2 11 .8 .9 8. .60 .10 23 5.0 72 .6 .8 10 .60 .10 24 4.8 19 .4 .7 8. .50 .10 25 4.6 248 .2 .7 8. .50 .10 26 4.3 19 .0 .7 8. .50 .10 27 4.0 17 .6 .7 9. .50 .10 28 4.0 14 .2 .7 8. .40 .10 29 4.0 12 -... .7 7. .40 .10 30 4.0 10 .7 6. .40 0 31 4.0 0 TOTAL 0 3, 554.2 515.5 180.8 224.8 317. 10 29.40 5.10 0 .98 .16 MAX 1,540 248 8.5 40 5 1.8 .30 KIN 0 0 4.0 4.2 3.9 2. .8 .40 0 AC-F7 10

H7R YR NOTE NO GAGE-HEIGHT RECORD EXCEPT DEC. 5-8, JAN. 22-25, APR. 11-14.

DISCHARGE , IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEM ER 1968 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL 1 0 4.0 4.4 4.1 3.3 4.0 .3 .40 .10 2 0 3.0 4.3 ' .0 3.3 15 .3 .40 .10 3 0 2.5 4.2 '>.0 3.2 9.5 .2 .40 ..10 4 0 2.4 4. 1 3 .9 3.2 8.0 .2 .40 .10 5 0 2.3 4.1 3.8 3.1 6.5 .1 .40 .10 6 0 .10 7 0 3.0 3.9 3.7 10 4.5 .0 .30 .10 8 0 2.8 3.9 3.7 148 3.7 .0 .30 .10 9 0 2.5 3.9 3 .7 29 3.5 .0 .30 .10 10 0 2.3 3.8 3.7 20 3.0 .90 .30 .10 11 0 2.0 3.8 3.6 18 2.6 .90 .30 .10 12 0 2.0 3.8 3 .5 IS 2.4 .90 .30 .10 13 0 2.3 3.8 .0 14 2.3 .90 .20 .10 14 0 2.3 3.8 t .5 11 2.1 .80 .20 .10 15 0 3.1 3.8 4.3 10 2.0 .80 .20 .10 16 0 4.0 3.8 4.2 9.0 2.0 .80 .20 .10 17 0 10 3.8 ',.1 7.0 2.0 .70 .20 .10 18 0 40 3.8 ' .0 6.0 1.9 .70 .20 .10 19 12 96 3.7 .9 4.7 1.9 .70 .20 .10 20 13 40 3.7 3.8 4.5 1.8 .70 .20 .10 21 28 30 22 IT 20 3.7 3.6 4.4 1.7 .60 .20 23 4.7 15 3.7 3.6 4.3 1.7 .60 .10 24 3.3 10 3.7 3.$ 4.3 1.6 .60 .10 25 26 27 2.8 5.6 4.5 3.4 4.1 1.5 .50 .10 28 29 2.4 $.0 4.5 3.4 4.0 1.4 .50 .10 30 5.0 4.7 31 4.5 4.1 4.0 .50 TOTAL 0 97.0 342.5 122.5 110.7 371.3 99.5 25.10 7.00 2.00 MEAN 0 3.23 11.0 3.95 3. 82 12.0 3.32 .81 .23 < .065 MAX 0 28 96 4.5 ! .0 148 15 1.3 .40 .10 MIN 0 0 2.0 3.7 3 .4 3.0 1.4 .50 .10 0 AC-FT 0 192 679 243 220 736 197 50 14 4.0 CAL YR 1967 TOTAL 1,812.90 NEAN 4.97 MAX 248 MIN 0 AC-FT 3,600 WTR YR 1968 TOTAL 1,177.60 MEAN 3.22 MAX 148 MIN 0 AC-FT 2,340 SAN LUIS KEY RIVER BASIN

11041000 SAN LUIS REY RIVER NEAR BONSALL, CALIF.--CONTINUED

DISCHARGEt IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 NOV DEC JAN FEB

) .04 .5 48 ISO 35 8.4 .3 2. .50 . 0 ) .04 .4 42 100 50 8.0 .2 1. .50 . 2 .04 .3 39 75 44 7.9 .2 1. .50 .4 ) .04 , 1 37 60 41 7.7 .2 I. .50 . 6 ) .04 .0 33 50 40 7.5 .1 1. .50 . 9

.04 .9 238 48 45 .3 .1 1. .50 .61 ) .04 .8 103 46 40 .1 .1 1. .50 .83 } .04 .7 80 44 36 .9 .0 t. .50 .86 .04 .6 70 90 32 .7 .0 1. .50 .88 .04 .5 60 60 30 .6 .0 1. .50 .91

) .10 .4 55 50 28 .4 .0 1. .50 .94 .08 .3 50 70 25 .2 .9 . 4 .51 .97 .07 .2 47 55 23 .1 9 0 .51 .0 .06 .0 46 48 21 .0 .9 )5 .52 .0 .10 .05 .0 45 45 19 .8 .8 )1 .52 .0 .10 .05 .0 44 42 18 -7 .8 .77 .52 .1 .10 .05 .8 43 40 17 .6 .8 4 .53 .1 .10 .04 .6 42 38 16 * .7 .71 .54 .2 .09 .05 .0 70 37 15 .09 2.5 .5 80 36 14 .C9 2.0 1 68 120 13 ;t .6 .63 .56 .3 .08 1.8 .0 143 60 12 .0 .6 .( 1 .57 .4 .08 1.6 .0 49 50 12 ^9 .6 .59 .58 .4 .07 1.4 1 1,870 45 11 .07 2.0 1.39 3,160 40 11 IB .06 3.0 50 847 39 10 ff .2 .54 .62 .6 .06 3.0 16 346 38 9.4 6 .1 3 .63 .7 .05 2.8 8 249 37 9.1 .5 .9 2 .64 .6 .05 2.7 7 __-._*.. 36 8.9 9 5 .7 1 .66 .8 .05 2.6 6 _ v_ 36 8.6 4.4 .5 . )0 .67 .9 2.5 5 35 *** TOTAL MEAN MAX 0 .10 3.0 1,3901.390 3,160 150 50 8.4 .3 2.2 .68 1.9 MIN 0 0 .04 1.2 33 35 8.6 4.4 .5 .50 .50 .70 AC-FT 0 2.5 57 4,790 15,880 .3,4103,410 1,380 364 221 58 34 69 CAL YR 1968 TOTAL 768.19 MEAN 2.10 MAX 148 MIN 0 AC-FT 1,520

NOTE NO GAGE-HEIGHT RECORD NOV. 15 TO JAN. 24, FEE . 27 TO SEPT. 30

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTO »ER 1969 TO SEPTEMBER 1970

1 2.0 2.3 3.9 4 7.4 200 4.4 .8 1.6 .3 .32 .16 2 2.0 2.3 3.9 4. 7.3 80 4.3 . .68 .3 .30 .18 3 2.0 2.3 3.9 4. 7.2 45 4.3 . .67 .4 .29 .16 4 2.0 2.3 3.9 4. 7.1 10 4.1 ^ .77 .1 .21 .17 5 2.0 2.3 3.9 4. 7.0 45 4.1 .95 .3 .20 .17 6 2.0 10 .8 4. 6.8 25 4.1 . 2.9 .1 .23 .14 7 2.0 7.0 .8 4. 6.7 IB 3.7 , 4.9 .66 .27 .10 8 2.0 6.0 .8 4. 6.6 16 3.2 , 5.2 .53 .19 .08 9 2.0 3.7 .8 4. 7.5 14 3.1 . 4.5 .0 .15 .09 10 2.0 5.0 .5 5. 8.5 15 3.1 4.1 .2 .10 .09 11 2.1 4.7 .4 6. 10 13 2.8 1. 4.5 .4 .OB .07 12 2.1 4.5 .4 5. 8.0 11 3.2 . 6 4.1 .9 .09 .09 13 2.1 4.4 .4 4.8 7.0 10 3.1 .81 3.5 .5 .10 .OB 15 2.1 4.3 4.3 6.0 5.5 10 2.4 .64 3.8 .1 .08 .07

17 2.1 4.2 4.3 14 4.5 8.7 2.8 .49 2.0 .4 .06 .12 18 2.2 4.2 4.2 12 4.2 7.9 3.1 .46 1.6 .1 .06 .13 19 2.2 4.2 4.2 11 3.9 5.9 3.1 .43 2.0 .3 .07 .16 20 2.2 4.1 4.2 10 3.4 5.2 3.4 .45 3.4 .0 .08 .18 21 .13 .16 23 .15 .16 24 2.2 4.0 4.1 B.8 3.2 5.9 1.6 .56 2.0 .85 .16 .20 25 2.2 4.0 4.1 8.5 3.2 5.5 1.7 .64 1.9 .81 .16 .15 26 2.3 3.9 4.1 8.3 3.2 5.5 1.9 .68 1.8 .99 .12 .18 27 2.3 3.9 4.1 8.1 3.1 5.1 3.1 1.1 1.7 1.4 .10 .11 28 2.3 3.9 4.1 7.9 10 4.5 2.8 1.4 1.6 1.0 .12 .05 29 2.3 3.9 4.1 7.7 5.9 2.1 1.6 1.5 .56 .16 .01 30 .17 0 31 2.3 4.0 7.5 5.5 1.9 .41 .15 TOTAL 66.1 126.0 128.4 223.3 162.4 618.5 90.2 33.42 76.37 37.37 4.58 3.58 MEAN 2.13 4.20 4.14 7.20 5.80 20.0 3.01 1.08 2.55 1.20 .15 .12 MAX 2.3 10 4.8 15 10 200 4.4 1.9 5.2 2.5 .32 .20 MIN .43 .67 .41 .06 0 »C-FT 131 250 255 443 322 9.1 7.1

WTR YR 1970 TOTAL 1,570.08 MEAN 4.30 MAX 200 MIN 0 AC-FT 3.110

NOTE. NO GAGE-HEIGHT RECORD OCT. 1 TO MAR.-6. SAN LUIS REY RIVER BASIN

11042000 SAN LUIS REY RIVER AT OCEANSIDE, CALIF. LOCATION. --Lat- 33°12'48", long 117°22'33", in SWSsSESijSWSs sec.14, T.ll S. , R.S W. , San Diego County, on right bank 0.7 mile upstream from bridge on U.S. Highway 101, 1.1 miles upstream from mouth, and 1.2 miles north of Oceanside. DRAINAGE AREA.--558 sq mi Crevised). PERIOD OF RECORD.--April 1912 to September 1914 (published as "near Oceanside"), January 1916, October 1929 to January 1942, October 1946 to September 1970. GAGE.--Water-stage recorder. Altitude of gage is 20 ft (from topographic map). April 1912 to September 1914 nonrecording gage at site 0.8 mile upstream at different datum. Janua-ry 1916 nonrecording gage 0.2 mile down­ stream at different datum. AVERAGE DISCHARGE.--38 ye (1912-14, 1929-41, 1946-70), 15.4 cfs (11,160 acre-ft per year); median of yearly mean discharges, zero. EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height 3t) for the water years 1966-70 are contained in the following table: Maxi Minimum, daily Wtr yr Date Discharge G.H. Date Discharge 1966 Nov. 23 1965 624 13.31 1967 1966 4,680 16.69 1968 1968 147 9.63 Oct. 1 to Nov. 21, 1967 1969 11,500 Sept.30, 1969 .34 1970 530 7.53 Nov. 4, 1969 .11 Period of record: Maximum discharge, 95,600 cfs 27, 1916, from hydrograph based on discharge measure- ments; no flow for several months in most years. REMARKS.--Records good except those for periods of no gage-height record, which are poor. F ow regulated by Lake Henshaw (capacity, 194,300 acre-ft). Several diversions for irrigation and domestic use bove station. AVER- AGE DISCHARGE represents flow to ocean during period of record, regardless of upstream de elopment.

DISCHARGE. IN CUBIC FEET PER SECOND. MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

JUS JUL AUG

0 .10 .7 0 .10 .8 0 Q .4 0 Q .2 0 0 6

0 0 .6 0 0 .6 0 0 .4 0 0 .2 < 0 .80 .8

0 3.4 .6 0 4.7 .5 0 4.7 .4 0 0 7.3'5.0 .2 0 0 .2 0

0 15 .1 .30 0 16 .0 .20 0 12 .90 .20 0 8.9 .90 .10 0 6.9 .1 .10

0 .7 .2 .10 0 .4 .1 .10 139 6 .1 .10 46 .8 .1 .10 12 .6 .90 .10

5.8 .0 .70 .10 2.8 .6 .60 0 1.0 .4 .30 0 .60 .5 .20 .30 .4 .50 31 - .2 j.5

TOTAL 207.50 11 .10 50.40 30.20 0 0 0 MEAN 6.92 .84 1.63 1.08 0 0 0 MAX 139 16 4.7 5.3 0 0 0 MIN 0 0 .20 000 0 AC-FT 412 236 100 60 0 0 0

I 326.60 MEAN .89 MAX 139 MIN 0 AC-FT 648 SAN LUIS REY RIVER BASIN

11042000 SAN LUIS REY RIVER AT OCEANSIDE, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

NOV DEC JAN* FEB MAR APR MAY JUN JUL

1 0 .10 2.4 0 .70 .50 2 0 .10 1.2 0 1.2 .50 3 0 .10 1.5 0 1.4 .50 4 C .10 2.6 0 .60 .40 5 0 .10 1.2 0 .70 .40 6 191 0 .70 0 .70 .30 7 1,700 0 .40 0 .60 .20 8 57 0 .30 0 .60 .20 9 16 0 .20 0 .50 .20 10 11 .10 0 .40 .20

11 12 0 .10 0 4.8 .20 12 4.8 0 .10 0 24 .20 13 3.0 0 0 .10 6.3 .10 14 2.4 0 0 4.6 3.2 .10 15 1.6 0 0 6.3 2.3 0 16 1.0 0 0 2.8 1.4 0 17 .90 0 0 1.9 1.0 0 18 .70 0 .10 1.5 .70 0 19 .50 0 .10 1.0 1.2 0 20 .40 0 0 .70 4.6 0 21 .30 0 0 .40 3.6 0 22 .20 .10 21 ' 0 .30 4.1 0 23 .10 .20 .30 8.0 0 24 .10 17 .40 .20 3.6 0 25 .10 195 .20 .20 2.1 0

26 .10 22 .20 .20 1.6 0 27 .10 12 .10 .20 1.2 0 28 .10 7.6 . 0 .20 1.0 0 29 .10 5.2 .20 .80 0 30 .10 4.4 .10 .70 0 31 .10 3.6

TOTAL 0 0 2,063.70 . 288.40 12.10 21.50 83.80 4.00 0 0 0 0 MEAN 0 0 64.6 9.30 .43 .69 2.79 .13 0 0 0 0 MAX 0 0 1,700 195 2.6 6.3 24 .50 0 0 0 0 MIN 0 0 0 0 0 0 .40 0 0 0 0 0 AC-FT 0 0 3,970 572 24 43 166 7.9 0 0 0 0 CAL YR 1966 TOTAL 2,084 .30 MEAN 5.71 MAX 1,700 MIN 0 AC-FT 4,130

NOTE . NO GAGE-HEIGHT RECORD DEC . 20 TO JAN. 21.

OISCHA GE, IN CUt 1C FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY OCT NOV DEC JUN JUL AUG SEP 1 0 .40 2 0 2.9 2.1 2.1 5.4 2.6 1.7 3.6 1.4 .30 3 0 1.6 2.8 2.1 2.1 6.0 2.6 1.6 3.0 1.4 .30 4 0 1.0 2.8 2.1 2.0 4.6 2.6 1.5 2.6 1.4 .30 5 0 .90 2.7 2.1 2.0 3.8 2.6 1.5 2.3 1.4 .30 6 0 .30 7 0 1.4 .40 8 0 1.2 2.5 1.9 36 3.2 2.6 1.4 1.8 1.2 .40 9 0 .80 2.4 1.9 77 3.2 2.6 1.3 1.7 1.2 .40 10 0 .70 2.4 2.0 36 3.2 2.6 1.3 1.6 1.1 .50 11 C .70 2.4 2.0 30 3.2 2.7 1.3 1.6 1.1 .50 12 0 .70 2.3 1.9 26 3.2 2.7 1.3 1..5 1.0 .50 13 0 1.0 2.3 2.5 21 3.2 2.7 1.2 1.5 1.0 .60 14 0 1.0 2.3 2.7 18 3.2 2.7 1.2 1.5 .90 .60 15 0 1.5 2.3 3.5 12 3.2 2.7 1.2 1.5 .90 .60 16 0 .90 .70 17 0 1.2 1.5 .90 .70 18 0 12 2.3 3.1 11 3.2 2.7 1.1 1.5 '.80 .70 19 0 74 2.3 3.0 4.1 3.2 2.7 1.1 1.5 .80 .60 20 0 52 2.2 2.9 4.0 3.2 2.7 1.1 1.5 .80 .80 21 0 25 2.2 2.8 3.8 3.0 2.8 1.1 1.4 .70 .90 22 1.2 18 2.1 2.7 3.7 3.0 2.8 1.1 1.4 .70 .90 23 3.8 14 24 1.9 25 .50

26 .10 4.8 .60 .1 27 .10 4.3 2.5 2.3 3.2 2.8 2.8 1.0 1.4 .50 .2 28 .10 .50 .2 29 .40 .50 .3 30 1.5 3.5 2.3 2.9 2.7 2.3 1.0 1.4 .40 .3 31

TOTAL 0 9.60 257.40 74.0 70.4 338.5 101.4 82.2 37.2 56.0 28.40 21.10 MEAN 0 .32 8.30 2.39 2.43 10.9 3.38 2.65 1.24 1.81 .92 .70 MAX 0 3.8 74 1.3 MIN 0 0 .70 .30 AC-FT 0 19 511 56 42 CAL YR 1967 TOTAL 676. 80 MEAN 1.85 MAX 195 MIN 0 AC-FT 1,340 WTR YR NOTE. NO GAGE-HEIGHT RECORD FOR MOST OF YEAR. SAN LUIS KEY RIVER BASIN

11042000 SAN LUIS REY RIVER AT OCEANSIDE, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEE PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY 0CT NOV DEC JAI> FEB

1 1.9 1.5 2. 30 82 20 5.8 3. 2.5 1.9 1.1 2 1.9 1.5 2. 2B 66 IB 5.6 3. 2.5 1.9 l.l 3 1.9 1.5 2. 27 60 35 5.4 3. 2.5 .8 1.0 4 1.9 1.5 2. 27 58 20 5.2 3. 2.4 .B 1.0 5 1.9 1.5 2. 27 56 IB 5.0 3. 2.4 .B .97 6 2.0 1.6 2. 105 55 23 4.9 3. 2.4 .B .94 7 2.0 1.5 2. 197 54 IB 4.7 3. 2.4 .7 .91 8 2.0 1.4 2. 76 53 17 4.6 3. 2.4 .7 .90 9 2.0 1.2 2. 59 52 16 4.6 3. 2.4 1.7 .87 10 2.0 l.l 2. 52 51 15 4.5 3. 2.4 1.7 .84 11 2.0 1.2 2. 48 5C 14 4.5 3. 2.3 1.6 .81 12 2.0 1.2 2. 4? 50 13 4.5 2. 2.3 1.6 .77 13 2.0 1.6 2. 40 65 12 4.4 2. 2.3 1.6 .75 1* 2.0 1.8 3. 38 117 12 4.3 2. 2.3 1.6 .73 15 2.0 1.8 3. 37 34 12 4.2 2. ) 2.3 1.5 .70

16 2.0 1.8 2. 36 25 11 4.2 2. ) 2.3 1.5 .67 17 1.9 1.8 2. 37 20 11 4.1 2. 2.3 1.5 .65 IB 1.8 1.6 3. 46 20 10 4.0 2. ) 2.2 1.5 .62 19 1.7 1.6 4. 66 17 10 4.0 2. ) 2.2 1.4 .59 20 1.7 1.6 3. 93 17 10 3.9 2.- 2.2 1.4 .56 21 1.6 1.8 3. r 2.2 1.4 .54 22 1.6 1.8 3. 129 164 B.B 3.B 2. r 2.1 1.4 .52 23 1.6 1.9 2. 106 67 8.4 3.7 2. 2.1 1.3 .50 24 .47 25 .7 1.5 2.3 491 2,340 34 7.5 3.6 2.6 2.1 1.3 .45 26 .8 1.5 2.6 738 3,340 2B 7.2 3.6 2.6 2.0 1.2 .42 27 .8 1.5 2.6 1B4 202 27 6.B 3.5 2.6 ' 2.0 1.2 .40 28 .8 1.5 2.8 71 117 25 6.5 3.5 2.6 2.0 1.2 .38 29 .36 30 .6 1.5 2.B 35 23 6.0 3.4 2.5 2.0 1.1 .34 31

TOTAL 4 .7 54.0 56. B 1,658.4 8,686 1,516 3B9.9 132.0 B6.3 69.5 46.7 20. B6 MEAN 1 57 1.80 1.83 53.5 310 48. 9 13.0 4.26 2.88 2.24 1.51 .70 MAX .8 2.0 3.0 738 3,340 164 35 5.B 3.4 2.5 1.9 1.1 M1N .34 773 262 171 136 93 41

DISCHARGE. IN CUBIC FEET PER SECOND , HATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 DAY OCT NOV DEC JAN FEB AUG SEP 1 .32 .32 1.5 3.8 2.1 45 2.B 2.B 3.6 4.3 2.5 3.0 2 .32 .23 i.a 3. 2.1 264 2.8 2.5 3.7 3.3 2.5 3.0 3 .32 .23 2.1 3. 2.5 67 3.3 2.1 3.8 2.5 2.5 3.0 4 .23 .11 2.5 3. 2.8 16 2.B 1.8 4.3 2.5 2.5 3.0 5 .16 .42 2.1 3. 3.3 53 2.5 l.B 3.3 2.8 2.5 3.0 6 .16 .54 2.1 3. 3.3 66 3.3 1.9 3.3 3.3 2.6 3.1 7 .85 1.8 2.1 3. 3.8 39 3.3 1.9 3.3 3.8 2.6 3.1 8 1.8 6.9 2.1 3. 3.B 13 2.8 2.D 3.B 4.3 2.6 3.1 9 2.8 8.4 2.B 3. 3.8 12 2.8 2.1 3.8 4.9 2.6 3.1 10 3.3 7.6 2.8 3.B 8.4 11 11 3.3 3.3 2.5 5.5 12 10 3.3 2.2 4.3 4.3 2.7 3.1 12 2.1 3.3 2.5 6.2 11 13 1.8 4.3 2.1 4.9 10 13 2.8 14 15 3.8 4.9 16 17 3.8 3.8 2.5 12 18 4.9 3.8 2.1 22 6.9 4.9 2.B 2.7 4.3 1.8 2.8 3.2 19 20

21 22 23 1. 24 2. 1 2.8 2.1 3.3 3.8 2.8 3.3 3.1 3.3 2.5 2.9 3.2 25 3. 3 2.8 2.1 2.5 3.8 2.8 3.8 3.1 3.8 2.1 2.9 3.2 26 3. 27 3. J 2.5 2.5 2.5 4.3 2.5 4.3 3.3 3.3 2.5 3.0 3.3 28 29 1.8 1.8 30 .85 1.5 2.5 2.1 3.8 2.B 3.5 3.3 2.5 3.0 3.3 31 3.3 2.1 2.8 3.5 2.5 3.0 DIAL 70.63 96.65 69.9 150.6 151.2 693.5 99.6 81.9 112.2 93.8 85.5 94.5 EAN 2.28 3.22 2. 25 4. B6 5. 40 22.4 3.32 2.64 3.74 3.03 2.76 3.15 AX IN .16 .11 C-FT 140 192 139 299 300 1,380 19B 162 223 186 170 187 CAL YR 1969 TOTAL 12,842.84 MEAN 35.2 MAX 3,340 MIN .11 . AC-FT 25,470 WTR YR 1970 TOTAL 1,799.98 MEAN 4.93 MAX 264 MIN .11 »C-FT 3,570 NOTE. NO GAGE-HEIGHT RECORD AUG. .1 TO SEPT. 30. SANTA MARGARITA RIVER BASIN

11042400 TEMECULA CREEK NEAR AGUANGA, CALIF. rside County, on right bank

DRAINAGE AREA.--131 sq mi. PERIOD OF RECORD.--August 1957 to September 1970. rom topographic map). s, 5.02 cfs (3,640 acrf r); median of yearly i an discharges, 1.6 cfs (l',200

EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum dischi rs 1966 -70 Date Time Disch. G.H. Date Time Disch. G.H. Date Dis ch. G.H. Nov. 22, 1965 2130 *2,320 6.37 Mar. 13, 1967 2345 140 2.12 Jan. 21, 1969 - 100 - Dec. 29, 1965 2300 295 2.80 Apr. 11, 1967 1130 168 2.28 Jan. 25, 1969 *2, 550 7.44 Apr. 22, 1967 0530 282 2.79 Feb. 6, 1969 1030 424 3.39 Dec. 6, 1966 2000 Feb. 25, 1969 2, 550 alO.6 Jan. 24, 1967 2400 Dec. 18, 1967 2000 *72 2.22 Mar. 8, 1968 1300 67 2.18 Mar. 2, 1970 1015 * 109 2.46

Annual minimum daily discharge, r years 1966-70 Wtr yr Date 1966 Long periods Oct. 1-9, 17, 1968 1967 Aug. 9, 1970 1968 do! od of cord: Maximum discharge, 3,540 cfs Apr. 3, 1958, from rating curve extended ab gage ight, 10.6 ft (from floodmarks) Feb. 25, 1969; no flow at times in each year.

REMARKS.--Records good except those for water years 1969-70, which are poor. No gage-height reco

REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY

1 0 6.8 26 .6 .90 2 D 5.6 18 .9 .70 3 0 4.8 15 .2 .70 4 0 4.5 13 .0 .70 5 0 4.0 11 .7 .60

6 0 3.4 9. I .50 1 0 2.9 8. 2 .40 6 0 2.7 7. 1 ' .50 9 0 6.7 7. 1 .90 10 0 13 6. 1 .90 11 0 11 6. ! .90 12 0 B.9 5^ .0 .90 13 0 9.4 5. .8 .70 14 0 B.6 5. .3 .60 15 0 7.B 4. .9 .50

16 0 7.8 4. .3 .40 17 0 7.2 4, .9 .40 18 0 5.9 4. .B .30 19 0 5.1 4. .3 .20 20 0 4.6 4. .B .20

21 0 4.1 3, .3 .20 22 587 6.3 3. .1 .20 23 635 6.6 3. .2 .20 24 100 5.5 3^ .1 .20 25 50 5.3 3. .3 .20 26 20 5.0 3 B .1 0 .20 27 15 4.5 3. .1 .20 28 11 4.2 3. .0 .20 29 9.6 32 3. .20 30 8.3 92 8...... 20 31 ...... 36 8. ______.20 TDTAt 0 1,435.9 332.2 220.3 217.7 10 4 50 14.10 MEAN 0 47.9 10.7 7.11 7.78 3 1 52 .45 MAX 0 635 92 26 29 2.2 .90 MIN 0 0 2.7 3.4 4.0 .80 .20 AC-FT 0 2,850 659 437 432 21 90 2B SANTA MARGARITA RIVER BASIN

11042400 TEMECULA CREEK NEAR AGUANGA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 APR MAY JUN JUL AUG SEP 1 0 3. 9.2 6.6 20 .4 .7 .04 .03 2 C 3. 8.9 . 8.4 1 .0 .5 0 .03 3 .1' 3. 8.4 7.2 1 .8 .2 0 .03 4 0 3. .9 . 8.6 I .8 .1 0 .03 5 335 3. ,4 19 1 .7 .1 0 .03

6 1,170 3. .6 . 11 1 .8 .93 0 .03 7 274 2. .5 9.1 I .6 .SB 0 .03 8 49 2. .0 .< 8.7 .7 .4 .74 0 .03 9 31 2. .6 ,' 7.7 .5 .5 .67 0 .03 10 25 2. .0 7.1 .7 .7 .57 0 .03 11 21 2. 6 . 48 , 2 .8 .50 0 .03 12 17 2. .4 34 , 1 .8 .75 0 .03 13 13 I. .4 1 26 .5 .6 .92 .01 .OB 14 12 2^ .3 4 22 *6 .6 .68 .01 .04 15 11 B 2 1 21 16 9.2 2> .1 1 18 ,9 .4 .39 .01 .03 17 8.8 2. .8 .6 17 .5 .4 .37 .01 .10 IB 7.8 2. .9 .2 17 . 5 .4 .34 .01 .14 19 6.8 2. .8 .9 32 .3 .1 .31 .01 .16 20 6.3 2. .6 .9 27 .1 .9 .27 .01 .16 21 5.9 2. ,3 .6 26 .7 .5 .23 .03 .12 22 $.4 5. .2 .0 125 .3 .2 .22 .03 .11 23 5.0 46 .2 .6 64 .5 .0 .20 .03 .12 24 4.7 58 .9 .3 46 .2 .6 .19 .03 .13 25 4.5 91 .8 .2 38 9 .6 .17 .03 .14 26 4.3 30 .0 .1 32 .1 .6 .16 .03 .10 27 4.1 18 .5 .0 27 .0 .3 .14 .03 .10 28 3.9 16 .3 .9 25 .3 .3 .12 .03 .10 29 3.7 13 .1 25 5 1 .11 .05 .20 30 3.5 10 .1 22 .6 .9 .10 .05 .20 31 3. 4 9.5 .6 .6 .09 .05 TOTAL 0 0 2.045.40 350.7 155.0 233.9 785.4 256.6 11 .7 17.18 .51 2.42 CEAN 0 C 66.0 11.3 5.54 7.55 26.2 8.28 3 96 .55 .017 .081 MAX 0 HIM 0 0 0 2.0 3.3 3.3 6.6 4.9 .9 .09 0 .03 AC-FT 0 0 4,060 696 307 464 1,560 509 235 34 1.0 4.8 CAL YR 1966 TOTAL 2,649.20 MEAN 7.26 MAX 1,170 HIM 0 AC-FT 5,250

, WATER DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 .20 .C3 1. 3. 2.0 1.8 3.1 .8 .39 .12 2 .15 .02 1. 3. 1.9 1.9 8.B .9 .34 .11 3 .15 .02 1. 3. 1.9 l.B 7.2 .8 .26 .11 4 .15 .05 1. 3. 1.8 1,7 5.2 .8 .28 .11 5 .14 .07 I. 2. 1.7 1.6 4.3 .8 .29 .10 6 .13 .OB 1. 2. 1.6 1.7 4.0 .8 .31 .13 7 .16 .09 1. 2. 1.6 2.0 3.6 .6 .38 .15 a .12 .07 1. 2. 1.8 23 3.4 .5 .47 .12 9 .OB .09 1. 2. 1.8 16 3.3 .5 .54 .10 10 .10 .09 1. 2. l.B 9.7 3.3 .5 .46 .08 11 .04 .09 1. 2. 1.9 7.3 3.1 .4 .32 .09 12 .01 .09 1. 2. 1.8 5.8 3.1 .9 .25 .06 13 0 .12 1. 2. 2.2 5.3 3.1 .0 .23 .07 14 0 .12 1. 2. 2.5 5.1 3.0 .6 .21 .09 15 0 .12 1. 2. 2.1 4.5 2.9 .4 .14 .10 16 0 .13 1.6 2. 2.1 4.1 3.0 1.3 .11 .07 17 0 18 0 .18 1$ 2 , 2.1 3.9 3.7 1.0 .09 .05 19 c .25 25 2. 2.0 3.9 3.0 .68 .09 .05 20 0 .22 12 2. 2.0 3.5 3.0 .83 .08 .Of 21 0 .24 7. 1. 2.0 3.3 2.9 .87 .08 .02 22 0 .71 5. 1. 2.1 3.1 2.8 .95 .10 .03 23 0 .77 4. 1. 2.0 3.0 2.5 .67 .13 .03 24 0 .65 4. 1. 1.9 3.0 2.4 .84 .14 .04 25 0 .58 4. 1. l.B 3.0 2.3 .74 .14 .04 26 .02 .58 4. 1. 1.8 3.0 2.3 .63 .10 .04 27 .04 .59 4. 2. 1.8 2.8 2.3 .4B .10 .06 28 .04 .96 4. 3. 1.9 2.6 2.2 .45 .08 .09 29 .07 1.0 4. 2. 1.8 2.6 1.9 .40 .08 .04 30 .07 1.1 4. 2. 2.6 l.B .42 .09 .02 31 _ns SANTA MARGARITA RIVER BASIN

11042400 TEMECULA CREEK NEAR AGUANGA, CALIF.--CONTINUED DISCHARGE , IN CU DAY OCT UN JUL AUG SEP 1 0 .06 .15 8.4 .4 . .29 .18 2 0 .06 .15 .9 4.5 110 13 8.2 .3 . .31 .17 3 0 .06 .15 .9 4.0 95 19 8.0 .3 . .29 .14 4 0 .07 .16 .9 3.5 80 15 9.0 .2 . .29 .14 5 0 .07 .17 .9 10 62 14 8.1 .1 . .26 .13 6 0 .07 .18 .9 280 55 17 9.0 .0 . .22 .12 7 0 .07 .19 .9 50 46 14 10 .0 . .22 .15 a 0 .07 .16 .9 35 45 13 9.4 .9 . .25 .19 9 0 .07 .16 1.0 25 44 16 8.3 .8 . .23 .16 10 .01 .08 .19 1.0 18 62 15 7.6 .8 . .22 .17 11 .01 .06 .20 1.0 14 50 14 7.3 .7 . .24 .17 12 .01 .09 .20 1.0 12 45 13 7.0 .7 . .20 .16 13 .01 .11 .21 1.2 12 38 12 6.7 .7 . .19 .15 14 .02 .11 .21 8.1 11 35 12 6.5 .6 . .20 .21 15 .02 .13 .22 5.0 11 33 12 6.3 .6 . .18 .23 16 .01 .12 .22 2.0 10 30 11 6.1 .5 . Z .16 .23 17 0 .12 .22 1.5 11 27 11 6.0 .5 . 1 .17 .23 18 .01 .10 .22 1.4 14 25 11 5.9 .4 .88 .18 . .20 19 .01 .10 .23 1.7 22 24 11 5.8 .4 .81 .18 .25 20 .02 .10 .32 41 30 23 11 5.7 .3 .76 .18 .28 21 .02 .10 .31 19 60 78 10 22 .01 .11 .50 7.0 120 50 10 5.4 .2 .38 .14 .28 23 .01 .11 .49 5.0 210 35 10 5.3 .2 .61 .11 .21 24 .01 .11 .59 8.2 1,070 31 9.8 5.2 .1 .67 .12 .21 25 .02 .12 .73 950 2,200 25 9.6 5.1 .1 .57 .15 .15

26 .02 .12 1.9 300 550 24 9.4 5.0 .0 .53 .15 .18 27 .02 .12 2.0 100 290 22 9.2 4.9 .0 .57 .16 .16 28 .02 .13 1.5 42 200 21 9.0 4.8 .8 .57 .19, .20 29 .03 .13 1.3 20 8.8 4.7 .4 .47 .19 .18 19 '8.6 30 .05 .13 1.2 10 18 4.6 .1 .37 .20 .16 31 5.70 MEAN .19 MAX .05 .13 2.0 950 2,200 150 19 10 .4 1.9 - .31 .31 MIN .12 AC-FT .8 5.8 31 3,060 10,480 2,810 719 405 209 63 12 11

DISCHARGE , IN CU 5IC FEET PER SECOND , MATER YEAR OCTOBER 1969 TO S EPTEMBER 1970 DAY OCT NOV DEC JUN JUL AUG SEP

1 .16 .55 1.4 2.1 1.8 49 2.9 2.4 1 0 .41 .19 .32 2 .17 .57 1.5 2.0 1.8 58 2.8 2.0 .73 .37 .17 .31 3 .22 .58 1.5 2.0 1.8 22 2.8 1.8 60 .36 .22 .34 4 .28 .61 1.5 2.0 1.8 12 2.5 1.7 70 .30 .29 .39 5 .23 .67 1.5 2.0 1.8 27 2.3 1.7 80 .29 .36 .45

6 .28 .91 1.6 2.0 l.B 14 2.3 1.8 80 .34 .34 .48 7 .28 1.8 1.6 2.0 1.8 9.7 2.3 2.0 86 .32 .27 .41 8 .28 1.7 1.2 2.0 1.7 8.0 Z.4 2.1 1 1 .35 .18 .40 9 .28 1.4 2 .43 . 14 .39 10 .33 1.4 1.5 2.2 1.8 6.8 2.2 2.1 1 3 .39 .17 .36 11 .37 1.3 2 .39 .24 .30 12 .38 , .36 13 .38 1.1 1.8 1.8 2.5 5.0 2.3 1.8 1.1 .37 .42 .44 14 .39 .59 15 .43 1.3 1.3 2.2 2.2 4.4 2.5 1.4 1 0 .29 .34 .58 16 .36 1.4 1.1 2.3 2.2 4.1 2.6 1.2 1 0 .33 .34 .52 17 .33 96 .34 .43 .46 18 .45 1.2 1.8 2.3 2.1 3.8 2.7 1.1 87 .38 .39 .40 19 .51 1.1 l.B 2.2 1.9 3.6 2.6 1.1 74 .26 .39 .39 20 .50 1.1 1.8 2.2 1.9 3.5 2.6 1.2 63 .30 .40 .40 21 .45 1.1 1.9 2.2 1.9 3.4 2.8 1.3 56 .37 .40 .51 22 .52 1.2 2.0 1.7 1.8 3.4 2.9 1.3 59 .41 .35 .54 23 .54 1.2 2.0 1.8 24 .55 1.2 1.7 2.1 1.9 3.1 2.4 1.3 .49 .38 .36 .50 25 .56

26 .62 1.7 .39 .35 ..46 .50 27 .59 .76 2.1 1.9 1.8 3.1 3.3 1.8 .35 .35 .57 .50 2B B.8 2.9 4.1 1.9 .37 .36 .47 .50 29 .53 1.2 2.1 1.7 2.9 3.5 1.8 .49 .31 .40 .50 30 .46 1.3 2.1 1.7 3.1 2.9 1.5 .48 .35 .29 .50 31 .51 2.1 1.7 3.1 1.3 .29 .33 13.32 MEAN .41 1.12 1.71 2.04 2.24 9.44 2.63 1.64 .76 .35 .33 .44 MAX .62 1.8 2.1 2.5 8.8 58 4.1 2.4 1.3 .43 .57 .59 MIN .16 .55 1.1 1.7 1.3 2.9 2.2 1.1 .'35 .26 .14 .30 AC-FT 25 67 105 125 124 581 156 101 46 . 21 20 26

WTR YR 1970 TOTAL 704.92 MEAN 1.93 MAX 58 MIN . 14 AC-FT 1,400 SANTA MARGARITA RIVER BASIN 11042500 TEMECULA CREEK AT VAIL DAM, CALIF. LOCATION.--Lat 33°29'44", long 116°58'33", in Pauba Grant, Riverside County, at Vail Dam, 0.2 mile downstream from Arroyo Seco and 10 miles east of Temecula. DRAINAGE AREA.--320 sq mi. PERIOD OF RECORD.--October 1948 to September 1970. January 1923 to October 1930 at site 200 ft downstream and October 1930 to September 1948 at site 500 ft downstream, published as "at Nigger Canyon, near Temecula"; on, near Temecula"; rec rds are for draft and spill only near Temecula."

500 ft downstream measures release and spill. AVERAGE DISCHARGE.--25 years (1923-48), 14.5 cfs [10,500 acre-ft per year); median of yearly mean discharges, 8.3 cfs (6,000 acre-ft per year), see PERIOD OF RECORD; 22 years (1948-70), 5.77 cfs (4,180 acre-ft per year); median of yearly mean discharges, 2.2 cfs (1,600 acre-ft per year). REMARKS.--Records of discharge represent all water reaching Vail Lake, including precipitation on lake surface. Discharge computed on basis of records of storage, release (draft), spill, and evaporation. Monthly evapora­ tion from lake surface computed on basis of evaporation from a class A evaporation pan using coefficient of 0.77, excepting the period June 1964 to September 1965 when a 24-inch diameter sunken screen pan with a coefficient of 0.98 was used. Area-capacity tables for lake are based on a survey made in 1947. Vail Dam ompleted in June 1949. Capacity of lake at spillway level (elevation, 1,470.00 ft), 49,370 acre-ft. Dead no spill since Nov. 13, 1948, date of closure. Water is released as re quired down Temecula Creek for diver- REVISIONS. --WSP 1928: Drainage area.

MONTHLY DISCHARGE, WATER YE VRS OCTOI ER 1965 TO S EPTEMBER 1970 MONTH E LEVATION CONTENTS CHANGE DRAFT EVAPO- DISCHARGE FEETlt (ACRE- IN (ACRE- RATION (ACRE- FEET) ( ACRE- FEET) VAIL LAKE FEET) OCTOBER 1965...... ,387.29 1,982 -35 0 79 44 ,399.69 0 51 2,513 ,401.44 4,922 + 78 0 54 532 +3, 00 10 838 4,248 , 02. 0 5,223 + 01 0 55 356 , 04. 3 5,700 + 77 0 62 539 MARCH , 04. 4 5,883 + 83 0 104 287 APRIL. , 04. 6 5,859 -24 0 130 106 , 04. 9 5,808 -51 0 133 82 , 04. 4 5,703 -105 0 171 66 , 02. 6 5,355 -348 182 217 51 , 02. 7 5,157 -198 3 215 20 SEPTEMBER...... , 01.86 5,040 -117 0 156 39 MTR YR 1966...... ,401.70 4,995 -45 0 106 61 ,401.87 5,043 +48 0 73 121 ,417.19 10,232 +5,189 0 66 5,255 +5,310 185 1,488 6,983 ,419.26 11,083 +851 0 113 964 0 118 329 ,420.79 11,739 +445 0 98 543 ,425.94 14,180 +2,441 0 129 2,570 MAY...... ,425.95 14,185 +5 575 255 835 JUNE...... 246 254 267 144 13,242 375 239 SEPTEMBER...... ,423.48 12,966 -276 0 201 -75 ,423.05 12,762 -204 0 245 41 ,423.10 12,786 24 0 160 184 DECEMBER...... ,423.50 12,976 + 90 0 87 277 ,423.58 13,014 38 0 113 151 FEBRUARY ...... ,423.75 13,094 80 0 100 180 246 APRI L ,423.84 13,137 -62 0 189 127 ,423.10 12,786 -351 138 242 29 289 80 ,421.55 12,076 -289 48 316 75 ,421.01 11,834 -242 0 286 44 ,420.42 11,578 -256 0 280 24 MTR YR 1968...... -1,388 398 2,448 1,458 0 161 57 ,420.07 11,426 -48 0 109 61 ,420.19 11,478 +52 0 89 141 -1,498 398 2,315 1,215 ,428.90 15,769 +4,291 . 0 128 4,419 ,449.19 29,756 +13,987 0 150 14,137 ,452.60 32,606 +2,850 0 278 3,128 ,453.00 32,950 +344 168 319 831 ,452.80 32,778 -172 229 380 437 ,452.37 32,408 -370 182 370 182 ,451.65 31,796 -612 118 644 150 ,450.79 31,076 -720 0 613 -107 SEPTEMBER...... ,450.52 30,852 -224 0 497 273

,449.94 30, 00 -450 0 308 -142 ,449.57 30, 00 -300 0 191 -109 DECEMBER...... ,449.43 29, 50 -150 0 141 -9 ,449.44 29, 60 +10 0 188 198 ,449.71 30, 80 +220 0 211 431 ,450. 0 30, 70 +490 0 270 760 ,449. 6 30, 60 -610 335 339 64 ,449. 2 29, 20 -440 240 481 281 ,448. 0 29, 30 -590 265 456 131 ,447. 5 28, 10 -520 0 611 91 ,447. 2 28, 00 -410 0 580 170 ,446.50 27, 10 -490 0 521 31 -3,240 840 4,297 1,897

A INTERPOLATED. NOTE. FOR MONTHS WHEN INFLOW TO THE LAKE WAS SMALL AND OTHER QUANTITIES WERE LARGE, DISCORDANT FIGURES OF DIS­ CHARGE MAY APPEAR. THIS ARISES PRIMARILY FROM THE DIFFICULTY OF COMPUTING DISCHARGE AS A RESIDUAL OF SEVERAL LARGER QUANTITIES, WHICH ARE NOT SUSCEPTIBLE TO MEASUREMENT WITH A PRECISION NECESSARY TO PRODUCE A FINAL ANSWER WITHIN DESIRABLE LIMITS OF ACCURACY. SANTA MARGARITA RIVER BASIN

11043000 MURRIETA CREEK AT TEMECULA, CALIF. LOCATION.--Lat 33°28'47", long 117°08'35", in ula Grant, Riverside County, on right bank 0.4 mile upstream from mouth and 1.0 mile south of Temecula. DRAINAGE AREA.--222 sq mi. 1970. Monthly discharge only October 1924 to September 1930, pub-

GAGE.--Water-stage recorder. Concrete low-water control since August 1962. Altitude of gage 970 ft (from topographic map). See WSP 1928 for history of changes prior to Dec. 17, 1938. AVERAGE DISCHARGE.--46 years, 9.24 cfs (6,690 -ft per year); median of yearly mean discharges, 2.3 cfs (1,700 acre-ft per year). EXTREMES.--Maximums and minim ms (discharge in cubic feet per second, gage height in t). Annual maximum di charge [*) and peak discharges above base (55 cfs), wat 1966-70 Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 23, 1965 0100 3,710 6.87 Jan. 25, 1967 0030 1,010 4.22 Jan. 25, 1969 1500 6,660 9.94 Dec. 10, 1965 1400 112 2.06 Feb. 6, 1969 0900 6,320 9.70 Dec. 29, 1965 2100 *5,020 7.78 Mar. 8, 1968 1500 46 1.50 Feb. 25, 1969 1500 *10,400 12.34 Dec. 6, 1966 2030 *1,510 4.86 Jan. 21, 1969 1300 530 3.35 Mar. 1, 1970 2030 *2,200 5.98 Mar. 5, 1970 0330 494 3.34 Annual minimum d

DISCHARGE, IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 .20 .30 .60 4.8 .60 .40 -.40 .20 .20 .20 .20 .20 2 .20 3 .20 .70 .50 1.5 .60 .30 .30 .20 .20 .20 .20 .20 4 .20 .60 .40 1.3 5 .20 .40 .40 1.0 .50 .30 .30 .60 .20 .20 .20 .20 6 .20 .40 .30 .80 .80 .30 .30 .40 .20 .20 .20 .20 7 .20 .60 .30 .80 2.1 .30 .30 .30 .20 .20 .20 .20 8 .20 .40 .30 .70 1.2 .30 .30 .30 .20 .20 .20 .20 9 .20 .30 .60 .BO 10 .20 .60 .60 .60 .30 .30 .30 .20 .20 .20 .20

11 .20 .70 1 .60 .60 12 .20 .60 .3 .60 .50 .30 .30 .20 .20 .20 .20 .20 13 .20 .70 .4 .50 .50 .30 .30 .20 .20 .20 .20 .20 14 .20 .BO .6 .50 .40 .30 .30 .20 .20 .20 .20 .20 15 .30 .90 .7 .50 .40 .30 .30 .20 .20 .20 .20 .20 16 .40 1.3 .8 .50 .50 .30 .30 .20 .20 .20 .20 .20 17 .30 2.0 .8 .50 .50 .30 .30 .20 .20 .20 .20 .20 IB .20 l.C .B .50 .50 .30 .30 .20 .20 .20 .20 .20 19 .30 .50 .0 .50 .50 .30 .30 .20 .20 .20 .20 .20 20 .30 .30 .BO .50 .50 .30 .30 .20 .20 .30 .20 .20 21 .40 .20 .60 .50 .40 .30 .30 .20 .20 .30 .20 .20 22 .40 *47 .60 .50 .40 .30 .30 .50 .20 .20 .20 .20 23 .30 940 .60 .40 .40 .30 .30 .30 .20 .20 .20 .20 24 .30 8.4 .60 .40 .40 .30 .30 .30 .20 .20 .20 .20 25 .20 4.1 .60 .40 .40 1.9 .30 .40 .20 .20 .20 .20 26 .30 3.0 .60 27 .30 1.7 .60 .40 .40 1.2 .30 .30 .20 .20 .20 .20 28 .20 1.0 .60 .40 .40 .60 .20 .20 .20 .20 .20 .20 29 .30 .80 798 .40 -» ___ .40 .20 .20 .20 .20 .20 .20 30 .20 .60 295 1.0 .»__ .40 .20 .20 .20 .20 .20 .20 31 .20 9.7 1.0 "~ .40 .20 .20 .20 IB. 00 8.30 6.00 6.40 6.20 6.00 MEAN .25 47.3 38.6 .81 .59 .5B 1 30 .21 .20 .21 .20 .20 MAX .40 940 79B 4.B 2.1 5.7 .40 .60 .20 .30 .20 .20 MIN .20 .20 .30 .40 .40 .30 .20 .20 .20 .20 .20 .20 AC-FT IS 2.820 3,370 50 33 36 18 16 12 13 12 12 CAL YR 1965 TOTAL 2,817 .50 MEAN 7.72 MAX 940 MIN .10 AC-F7 5.590 5.410 SANTA MARGARITA RIVER BASIN

11043000 MURRIETA CREEK AT TEMECULA, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 DAY OCT NOV DEC JUN JUL AUG SEP 1 .20 .20 .20 .30 .40 .30 .30 .40 .20 .20 .20 .20 2 .20 .20 .20 .30 .40 .30 .30 .40 .20 .20 .20 .20 3 .20 .20 .80 .30 .40 .30 .30 .40 .20 .20 .20 .20 4 .20 .20 .50 .30 .30 -40 .40 .40 .20 .20 .20 .20 5 .20 .20 22 .30 .30 .30 .70 .40 .20 .20 .20 .20 6 .20 .20 315 .30 .30 .30 .50 .40 .20 .20 .20 .20 7 .20 .30 133 .30 .30 .30 .40 .40 .20 .20 .20 .20 8 .20 .20 4.8 .30 9 .20 .20 2.4 20 .20 10 .20 .20 1.5 .40 .30 .30 .30 .40 .20 .20 20 .20 11 20 .20 12 20 .20 13 " 20 .20 .60 .60 .30 1.0 1.7 .30 .20 .20 .20 .20 14 20 .20 .50 .80 .30 3.6 .90 .30 .20 .20 .20 .20 15 20 .20 .40 .80 .30 1.5 .60 .30 '.20 .20 .20 .20 16 20 .20 .70 .80 .30 .80 .40 .30 .20 .20 .20 .20 17 20 .20 .40 .60 .30 .60 .40 .30 .20 .20 .20 .20 IB .30 .20 .20 .20 .20 19 .20 .20 .4C .60 .30 .40 .80 .30 .20 .20 .20 .20 20 .20 .20 .30 .60 .30 .40 .80 .20 .20 .20 .20 .20 21 .20 .20 .30 .60 .30 .40 .60 .20 .20 .20 .20 .20 22 .20 .20 .30 2.1 .30 .30 .80 .20 .20 .20 .20 .20 23 .20 .20 .30 35 .30 .30 1.0 .20 .20 .20 .20 .20 24 .20 .20 .30 70 .30 .30 .60 .20 .20 .20 .20 .20 25 .20 .20 .30 219 .40 .30 .50 .20 .20 .20 .20 .20 26 .20 .20 .20 .20 27 20 .20 .30 1.9 .40 .30 .40 .20 .20 .20 .20 .20 28 '; 20 .20 29 20 .20 .30 .80 .30 .40 .20 .20 .20 20 .20 30 20 .20 .30 .60 .30 .40 .30 .20 .20 20 .20 31 TOTAL MEAN. 20 .20 15. B 11.2 .32 .51 .72 .30 .20 .20 20 .20 MAX 20 .30 315 219 .40 3.6 3.0 .40 .20 .20 20 .20 "43 20 .20 689 IB 32 18 12 12 12 12

MTR YR 1967 TOTAL 929.00

DISCHARGE , IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL UJG SEP 1 .20 .20 .30 .20 .20 .30 .30 .20 .20 .20 20 2 3 20 .20 .30 .20 .20 .30 .20 .20 .20 .20 20 4 20 .20 .30 .20 .20 .30 .20 .20 .20 .20 20 5 20 .20 .30 .20 .20 .30 .20 .20 .20 .20 30 6 20 .20 .30 .20 .20 .30 .20 .20 .20 .20 30 7 20 .20 .30 .20 .20 .30 .20 .20 .20 .20 30 8 20 .20 .30 .20 .20 13 .20 .20 .20 .20 20 9 20 .20 .30 .20 .20 4.3 .20 .20 .20 .20 20 10 20 .20 .30 .20 .20 1.1 .20 .20 .20 .20 30 11 20 .20 .30 .20 .20 .40 .20 .20 .20 .20 30 12 20 .30 .20 .20 .20 .20 30 13 ' 20 .20 .30 .20 .20 .30 .20 .20 .20 .20 60 14 10 .20 .30 .20 .20 .20 .20 .20 .20 .20 80 15 10 .20 .30 .20 .20 .20 .20 .20 .20 .20 90 16 10 .20 .30 .20 .20 .20 .20 .20 .20 .20 17 10 .20 .40 .20 .20 .20 .20 .20 .20 .20 IB 10 .20 1.8 .20 .20 .20 .20 .20 .20 .30 19 10 .50 9.2 .20 .20 .20 .20 .20 .20 .30 20 10 .20 6.0 .20 .20 .20 .20 .20 .20 .30 21 10 .50 .80 .20 .20 .20 .20 .20 .20 .30 22 10 .20 .30 .20 .20 .20 .20 .20 .20 .30 23 10 .20 .20 .20 .20 .20 .20 .20 .20 .30 24 .20 .30 25 .10 .20 .20 .20 .20 .20 .20 .20 .20 .10 26 .10 .20 .20 .20 .20 .10 27 .10 .20 .20 .20 .20 .20 .20 .20 .20 .20 28 .10 .20 .20 .30 .20 .20 .20 20 .20 .30 29 .10 .20 .20 .20 .20 .20 .20 .20 .20 .20 30 .10 .30 .20 .20 .20 .20 .20 .20 .20 31 .10 - .20 .20 .20 .20 .20 TOTAL 4.40 6.70 25.10 6.30 5. 80 2S.50 6.30 6.20 6.00 6.80 36 40 6 . MEAN .14 .22 .81 .20 .20 .82 .21 .20 .20 .22 1 17 20 MAX .20 .50 9.2 .30 .20 13 .40 .20 .20 .30 i.4 MIN .10 .20 .20 .20 .20 .20 .20 .20 .20 .10 20 AC-FT 8.7 13 50 13 12 51 13 12 12 13 72 121 CAL YR 1967 TOTAL 463.80 MEAN 1.27 MAX 219 MIN .10 AC-FT 920 HTR YR 1968 TOTAL 196.60 SANTA MARGARITA RIVER BASIN

11043000 MURRIETA CREEK AT TEMECULA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY OCT NOV DEC JUN JUL AUG SE 1 2.2 1.7 1.5 1.3 2.0 38 .40 .50 .41 .10 .08 .1 2 2.2 1.7 1.3 1.2 2.0 29 .40 .50 .23 .10 .08 .1 3 2.2 1.7 1.1 1.1 2.0 24 .50 .70 .20 .10 .08 .1 4 2.2 1.6 1.3 1.1 1.1 23 .50 .40 .46 .14 .08 .1 5 2.1 1.7 1.2 1.1 75 22 .50 .40 .55 .12 .08 .1 6 2.0 1.8 1.2 l.l 1,380 21 .60 .40 .29 .14 .10 . 7 2.0 1.8 1.2 1.0 147 21 .50 .40 .16 .14 .08 . 8 .0 l.B 1.2 1.0 24 20 .40 .30 .10 .14 .08 . 9 .9 1.8 1.5 1.0 7.6 20 .40 .30 .06 .14 .08 , 10 .8 l.B 1.8 1.0 3.0 17 .40 .30 .02 .14 .08 11 .8 1.9 1.8 1.0 1.1 15 .40 .30 .04 .14 .08 . 12 .8 1.9 1.8 1.1 .60 15 .50 .30 .04 .14 .08 , 13 .8 1.9 1.7 1.1 .50 12 .40 .30 .06 .14 .08 . 14 .B 1.9 1.7 1.7 .40 1 .40 .30 .08 .14 .08 15 .8 1.9 1.7 .B9 .40 .5 .40 .30 .10 .14 .10 16 .7 l.B 1.7 .89 .40 .5 .50 .20 .10 .14 .10 . 17 .7 l.B 1.7 .89 .40 .8 .50 .20 .20 .12 .10 IB .7 1.8 1.7 .92 7.9 .5 .50 .20 .46 .12- .10 19 .8 1.7 1.5 .95 45 .2 .40 .20 .38 .14 .10 20 .8 1.7 .10 21 .8 1.7 1.0 85 7.6 .9 .40 .12 .50 .14 .10 22 .8 1.7 1.0 3.3 206 .8 .50 .12 .41 .14 .10 23 .B 1.7 1.0 .21 !i 24 .8 1.7 1.0 9.6 25 .8 1.7 1.0 2, 530 7,050 .1 .70 .20 .23 .12 .10 .2

26 .B 1.5 1.1 520 1,150 .82 .60 .90 .12 .06 .10 .1 27 .8 1.2 1.0 119 164 .80 .46 .50 .35 .06 .10 .1 28 .8 1.4 1.0 8.4 68 .70 .46 .32 .23 .06 .1C .1 29 " 1.4 1.0 3.3 .60 .46 .32 .12 .06 .10 .1 30 * 1.4 1.0 2.6 .50 .50 .32 .12 .06 .10 .1 31 1.1 2.2 .40 .55 .06 .12 2.86 4.6 MEAN 1.87 .1 HAX 2.2 1.9 1.8 2,530 7,050 38 .70 .90 -.60 .14 .12 .2 MIN 1.7 1.2 .90 .21 .40 .40 .40 .12 .02 .06 .08 .1 AC-FT 115 101 81 6,560 33,550 672 28 20 14 7.3 5.7 9. 615

DISCHARGE, IN CUBIC FEET PER SECOND , WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 DAY JUN JUL AUG SE 1 .14 .12 .10 .08 .10 414 .14 .12 .16 .12 .06 .1 2 .16 .12 .10 .06 .10 689 .14 .12 .14 .12 .06 .1 3 .16 .08 .10 .06 .10 36 .14 .14 .14 .12 .06 .1 4 .12 .08 .1 5 .16 .04 .10 .06 .08 139 .14 .16 .12 .12 .08 .1 6 .16 .10 .12 .04 .10 9.0 .14 .16 .10 .12 .08 .1 7 .16 .08 .12 .04 .10 1.8 .14 .18 .12 .12 .08 .1 8 .16 .04 .12 .04 .10 .89 .14 .20 .12 .12 .08 .1 9 .16 .04 .12 .06 .10 .65 .14 .23 .12 .12 .08 .1 10 11 .16 .02 .12 .08 9.0 .55 .14 .29 .12 .12 .08 .1 12 .14 .02 .12 .10 .38 .38 .14 .32 .12 .12 .OB .1 13 .14 .02 .12 :OB .16 .32 .14 .32 .12 .12 .08 .1 14 .14 .04 .12 .OB .12 .26 .14 .32 .12 .10 .08 .1 15 .14 .08 .12 .10 .10 .23 .14 .29 .12 .10 .08 .1 16 .10 .08 .1 17 .14 .02 .12 .10 .10 .18 .14 .26 .10 .10 .10 .1 .14 .10 .1 19 .14 .02 .10 .10 .10 .14 .16 .23 .12 .10 .12 .1 20 .14 .04 .10 .10 .10 .16 .16 .20 .12 .10 .12 .1 21 .14 .04 .10 .08 .10 .35 .16 .20 .12 ,10 .12 .1 22 .14 .04 .10 .08 .12 .16 .16 .IB .12 .10 .12 .1 23 .14 .04 .10 .08 .12 .16 .23 .18 .12 .10 .12 .1 24 .14 .04 .10 .08 .14 .16 .41 .18 .12 .10 .12 .1 25 .14 .06 .10 .08 .14 .18 .70 .16 .12 .10 .12 .1 26 .14 .06 .10 .08 .16 .23 .41 .16 .18 .08 .12 .1 27 .14 .06 .10 .08 .16 .23 .18 .16 .18 .08 .12 .1 28 .14 .08 .10 .08 23 .20 .16 .16 .16 .08 .12 .1 29 .14 .08 .10 .08 _.._ _ .20 .14 .16 .16 .08 .12 .1 30 .12 .08 .10 .08 .18 .13 .16 .14 .08 .12 .1 31 .12 ___ .10 .08 .18 .16 .. .06 .12 OTAL EAN .15 .055 .11 .078 1.29 42.0 .18 .20 .13 .10 .096 .1 AX .16 .12 .12 .12 23 689 .70 .32 .18 .12 .12 .1 IN .12 .02 .10 .04 .08 .14 .13 .12 .10 .06 .06 .1 C-FT 8.9 3.3 6.7 4.8 72 2,590 11 13 7.7 6.4 5.9 7. CAL YR 1969 TOTAL 20,610.48 MEAN 56.5 HAX 7,050 HIN .02 AC-FT 40,880 SANTA MARGARITA RIVER BASIN

11044000 SANTA MARGARITA RIVER NEAR TEMECULA, CALIF. LOCATION.--Lat 33°28'26", long 117°08'29", in Temecula Grant, Riverside County, on left bank at uppe

DRAINAGE AREA.--588 sq mi. PERIOD OF RECORD.--January 1923 to September 1970. Prior to October 1952, published as Teme a Creek at Rail- road Canyon, near Temecula. order. Altitu of gage is 950 ft (from topographic map). Pri 3, 1966, at te

-ft p EXTREMES.--Maximums and minimums (discharge in ci 1966-70 are contained in the following table: Minimum Wtr yr Date scharge G.H. Date 1966 Dec. 29, 1965 5,040 8.00 Aug. 18-22, 1966 1967 Dec. 6, 1966 3,000 7.78 Oct. 14, 17, 1966 1968 Mar. 8, 1968 45 2.50 June 20, Aug. 1-8, 1968 1969 Feb. 25, 1969 14,600 15.32 Sept. 2, 5-12, 1969 1970 Mar. 2, 1970 2,100 6.77 May 23, 24, 1970

REMARKS.--Records good. Flow partly regulated since November 1948 by Vail Lake (see station 11042500). Pumping above station for irrigation. REVISIONS (WATER YEARS).--WSP 981: 1927(M). WSP 1928: Drainage area.

DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY OCT NOV SEP

1 3.0 2.4 3.8 19 4.4 3.7 3.5 2.8 2.2 2.4 2.4 2.3 2 3.0 2.4 3.5 11 3 2.1 5 2.4 2.6 3.2 5.0 4.2 3.5 3.0 4.2 3.2 2.3 2.2 2.1 6 2.1 8 9 2.3 2.3 14 4.0 4.2 3.8 2.8 2.6 3.2 2.2 2.3 2.2 10 2.3 2.6 38 3.8 11 2.3 2.7 17 3.8 3.8 3.8 2.8 2.3 2.3 2.1 2.2 2.2 12 13 15

16 2.4 4.0 11 3.8 3.5 3.8 2.7 1.5 2.4 2.4 2.1 2.0 17 2.3 4.8 10 3.8 3.7 3.8 2.8 .60 2.3 2.2 1.6 2.0 18 2.1 .30 2.0

20 21 22 3.2 330 23 3.0 1,150 24 2.6 25 3.8 3.5 3.8 4.4 3.2 2.3 2.2 2.3 1.8 2.0

26 2.3 4.4 3.8 3.5 3.7 17 3.3 2.6 2.3 2.2 2.6 2.0 27 28 29 2.4 4.4 750 3.3 2.1 30 2.4 4.2 318 5.1

62.1

MAX MIN 2.0 2.0 .30 2.0 2,550 290 227 271 182 152 145 144 117 123

CAL YR 1965 TOTAL 3,873.00 MEAN 10.6 MAX 1,150 MIN 1.6 AC-FT 7,680 SANTA MARGARITA RIVER BASIN

11044000 SANTA MARGARITA RIVER NEAR TEMECULA, CALIF.--CONTINUED DISCHARGEi IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

OCT NQV DEC JAN FEB MAR APR MAY JUN JUL

5 2.4 2.0 51 4.2 5.1 4.4 5.4 4.2 3.6 2.B 2.6 2.6

6 2.4 2.0 396 4.1 5.1 4.2 4.2 4.2 3.6 2.8 2.4 2.6 7 2.2 3.1 139 4.1 5.0 4.2 4.0 4.2 3.6 2.8 2.6 2.6 8 2.4 2.6 12 4.0 5.0 4.2 4.0 4.2 3.6 2.8 2.6 2.6 9 2.3 2.4 6.5 4*0 4.9 4.C 4.0 4.2 3.6 2*6 2.6 2.6

11 2.2 2.1 5.6 3.9 4.8 4.4 22 4.4 3.6 2.7 2.6 2.6 12 2.2 2.1 5.3 3.8 4.8 4.0 20 4.2 3.6 2.7 2.6 2.6 13 2.1 2.1 5.3 3.8 4.7 7.1 15 4.2 3.6 2.7 2.6 2.6 14 1.6 2.1 5.1 3.7 4.7 8.8 10 4.2 3.6 2.7 2.4 2.6

16 1.8 2.1 4.9 3.6 4.5 4.8 5.0 4.2 3.6 2.7 2.6 2.6 17 1.6 2.1 4.9 3.6 4.4 4.0 5.5 4.2 3.8 2.7 2.6 2.6 18 1.8 2.1 4.6 3.6 4.3 4.0 6.8 4.2 3.8 2.7 2.6 2*8 19 1.8 2.1 4.4 3.6 4.2 3.6 7.0 4.4 3.8 2.7 2.6 3.4 20 2.0 2.2 4.2 3.6 4.1 3.6 5.B 4.6 3.6 2.7 2.6 3.2

21 2.1 2.2 4.2 3.6 4.0 4.0 5.0 4.6 3.6 2.7 2.6 3.0 22 2.1 2.2 4.2 6.6 3.9 4.2 6.4 4.6 3.4 2.7 2.6 3.2 23 2.0 2.2 24 2.0 2.2 25 2.0 2.4 .2 234

26 1.8 2.4 Z7 1.8 2.6 .2 10 3.6 28 1.8 2.6 4.2 9.0 3.6 5.8 4.9 3.8 3.0 2.6 29 1.8 2.6 4.2 8.0 ~ - 6.9 4.6 4.0 3.0 2.6 30 1.8 2.6 4.2 7.0 5.6 4.4 4.0 3.0 2.6 31 1.8 4.2 6.5 4,6 4.0 2.6

TOTAL 63.7 66.7 724.7 495.7 127.9 146.4 204.0 132.2 104.8 84.6 80.2 82.5 MEAN 2.05 2.22 23.4 16.0 4.57 4.72 6.80 4.26 3.49 2.73 2.59 2.75 PAX 2.9 3.1 396 234 6.0 8.8 22 4.6 3.8 3.0 2.6 3.4 WIN 1.6 1.8 2.8 3.6 3.6 3.6 3.8 3.6 3.0 2.6 2.4 2.6 AC-FT 126 132 1,440 983 254 290 405 262 208 168 159 164

NOTE. NO GAGE-HEIGHT RECORD DEC. 8 TO JAN. 18, JAN 27 TO FEB. 28.

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

CAY OCT NOV DEC JAN FE8 MAR APR MAY JUN JUL AUG SEP

1 2.7 3.0 4.2 4.0 3.4 2.8 3.0 2.4 2.2 2.2 1.8 3.8 2 2.7 3.0 4.0 4.0 3.2 2.8 4.2 2.4 2.2 2.2 1.8 3.8 3 2.7 3.0 4.0 4.0 3.2 2.8 2.7 2.4 2.4 2.2 1.8 3.8

5 2.7 3.2 4.0 4.0 3.2 2.7 2.7 2.4 2*6 2.2 1.8 3.4

7 2.7 3.2 4.0 4.0 3.2 2*7 2.7 2.4 2.6 2.8 1.8 3.4 8 2.6 3.4 4.0 4.0 3.2 20 2.7 2.6 2.7 2.2 1.8 3.4 9 2.6 3.4 4.0 3.8 3.2 8.9 2.7 2.6 2.7 2.1 1.9 3.4 10 2.6 3.4 3.8 3.8 3.2 4.0 2.8 2.4 2.4 2.0 1.9 3.4

11 2.6 3.4 3.8 3.8 3.2 3.2 2.7 2.6 2.6 2.1 1.9 3.6 12 2.6 3.4 3.8 3.8 3.2 3.0 2.7 3.0 2.6 2.1 1.9 3.6 13 2.6 3.4 4.2 3.8 3.4 2.8 2.7 3.0 2.6 2.4 2.0 3.6 14 2.6 3.4 4.2 3.8 3.4 2.8 2.7 3.0 2.2 2.4 2.1 3.6 15 2.6 3.4 4.2 3.8 3.4 2.8 2.7 3.0 1.9 2.1 2.1 3.6

16 2.6 3.4 4.2 3.8 3.4 2.8 2.7 3.0 1.9 2.4 2.2 3.6 17 2.6 3.4 4.4 3.8 3.4 3.0 2.7 2.8 1.9 2.4 2.6 3.6 18 2.6 3.4 8.7 3.8 3.4 3.0 2.7 2.8 1.9 2.4 3.2 3.6 19 2.6 8.8 24 3.8 3.4 2.8 2.6 2.6 1.9 2.4 3.0 3.6 20 2.7 6.8 12 3.8 3.4 2.7 2.6 2.6 1.8 2.4 3.2 4.0

21 2.7 6.8 5.3 3.8 3.2 2.7 2.6 2.6 1.9 2.4 3.6 4.0 22 2.8 5.6 4.6 3.8 3.2 2.7 2.6 2.6 1.9 2.1 3.6 4.0 23 3.0 4.4 4.4 3.6 3.2 2.7 2.6 2.6 1.9 2.1 3.6 4.0 24 3.0 4.2 4.4 3.6 3.2 3.0 2.6 2.6 2.1 2.4 3.6 4.0

26 3.2 4.0 4.2 3.6 3.0 2.8 2.6 2.6 2.4 2.4 3.0 3.8 27 3.2 4.0 4.2 4.2 3.0 2.8 2.6 2.4 2.7 2.4 3.4 3.6 28 3.2 3.8 4.2 4.2 3.0 2.7 2.6 2.4 2.6 2.6 3.8 3.4 29 3.0 3.8 4.2 3.4 2.8 2.6 2.6 2.4 2.2 2.1 4.0 3.4 30 2.8 4.4 4.2 3.4 2.6 2.4 2.4 2.2 2.1 4.0 3.4 31 2.8 4.0 3.4 2.6 2.4 2.1 3.8

TOTAL 85.5 119.6 161.4 118.2 93.4 111.0 81.5 80.4 6B.4 70.5 82.2 109.2 MEAN 2.76 3.99 5.21 3.81 3.22 3.58 2.72 2.59 2.28 2.27 2.65 3.64 MAX 3.2 8.8 24 4.2 3.4 20 4.2 3.0 2.7 2.8 4.0 4.0 MIN 2.6 3.0 3.8 3.4 2.8 2.6 2.4 2.4 1.8 2.0 1.8 3.4 AC-FT 170 237 320 234 185 220 162 159 136 140 163 217

CAL 620 SANTA MARGARITA RIVER BASIN

11044000 SANTA MARGARITA RIVER NEAR TEMECULA, CALIF.--CONTINUED DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

NOV DEC JAN FEB 1 3.4 2.2 2.4 5. 6.4 65 4.8 4.0 2.6 2.6 2.1 2.0 2 3.4 2.2 2.2 5. 6.0 60 4.8 4.0 2.2 2.4 2.1 1.8 3 3.4 2.4 2.1 5. 5.8 55 6. 4.0 2.0 2.6 1.9 1.9 4 3.2 2.4 2.0 5. 5.4 '50 5. 4.0 2.6 2.6 1.9 1.9 5 2.6 1.9 1.8

6 3.0 I. 8 1.9 5. 1,240 40 6. 4.0 2.6 2.5 2.0 1.8 7 3.0 2. 8 1.9 5. 177 30 5. ,3.B 2.6 2.5 2.1 1.8 8 3.0 2. 8 2.0 5. 30 20 5. 4.0 2.8 2.5 2.4 1.8 9 2.8 2. 8 2.4 5. 10 10 5. 4.0 3.2 2.5 2.6 1.8 10 2.7 3. 0 3.0 5.8 6.0 10 5. 4.0 2.8 2.5 2.2 1.8 11 Z.7 12 13 14 2.7 3. 2 2.4 12 15

16 17 18 19 2.4 3. 6 2.8 6.0 48 4.8 4.4 3.8 3.6 2.3 2.4 1.9 20 2.4 3. 8 2.7 7.0 33 21 2.4 3. 6 2.7 118 10 19 4.4 3.0 4.0 2.2 2.1 2.1 22 2.4 3. 6 2.6 15 248 7.5 4.4 2.8 4.0 2.2 1.9 2.4 23 2.4 3. 4 2.8 6.3 657 24 2.2 3. 4 3.2- 25 5,940 25 2.2 3. 6 4.2 2,520 7,730

26 2.2 3. 2 4.6 575 1,300 5.2 4.0 2.4 3.2 2.1 2.2 2.6 27 2.2 2. 2 3.2 151 250 5.2 3.8 2.6 3.6 2.1 2.4 2.6 28 2.2 2. 4 3.2 33 100 29 30 2.4 2. 4 3.6 9.8 31 2.4 5.0 6.7 4.8 2.6 2.1 2.2 TOTAL 82.2 91. 6 86.8 3,599.1 17.874.3 516.9 142.0 106.8 94.6 72.4 68.8 62.3 MEAN

MIN 2.1 1.9 1.8 1,030 282 212 1B8 144 136 124 MIN 1.8 AC-FT 2,130

NOTE NO GAGE-HEIGHT RECORD OR STAGE-DISCHARGE RELATION INDEFINITE FEB. 26 TO MAR. 31.

970

DAY OCT NOV DEC- JAN FEB MAR APR MAY JUN JUL AUG SEP

1 2.4 2. 3.2 4.2 4.0 425 3.8 3.2 1.6 .1 1.5 .4 2 2.4 2. 3.2 4.2 4.0 717 3.8 3.2 2.0 .8 1.5 .3 3 2.4 ?. 3.2 4.2 4.D 46 3.8 3.2 2.2 .8 1.5 .3 4 2.4 2. 3.2 4.2 4.0 14 3.8 3.2 2.2 .8 1.5 .3 5 2.4 2. 3.4 4.2 4.0 108 3.8 3.2 2.2 .8 1.5 .3

6 2.2 2.4 3.4 4.2 4.0 16 3.8 3.2 2.2 .8 1.5 1.3 7 8 9 10 2.1

11 12 2.1 2. 1 13 14 2.1 15 .8 1.4 1.5

16 2.1 2. 8 .8 1.4 1.5 17 2.1 .8 1.4 1.5 18 19 20 21 22 23 24 25

26 2.1 27 28 29 30 31 2.1 4.0 4.0 3.6 1.5 1.5 1.5 TOTAL 66.3 74.0 111.8 131.2 144.6 1 ,454.2 95.4 74.1 70.6 55.1 44.7 43.4 MEAN 2.14 2.47 3.61 4.23 5.16 46.9 3.18 2.39 2.35 1.78 1.44 1.45 MAX MIN AC-FT 132 147 222 260 287 2,860 189 147 140 109 69 B6 94 SANTA MARGARITA RIVER BASIN

11044500 SANTA MARGARITA RIVER NEAR FALLBROOK, CALIF. LOCATION.--Lat 33°23'54", long 117°15'44", in NES(SE3(NES( sec.14, T.9 S. , R.4 W., San Diego County, on right bank

DRAINAGE AREA.--644 sq mi.

ean sea level (levels by Bureau of Reclamation). Prior to Oct. 1, 1955, at site 1.7 miles upstream at nt datum. Records equivalent except those for extreme low flows.

1966-70 are Maximum Minimum daily Wtr y r Date Discharge G.H. Date Dischar 1966 Nov. 23 1965 4,750 8.87 Many days 0 1967 Dec. 7 1966 3,480 7.82 Sept. 1, 1967 1968 Mar. 8 1968 157 5.32 July 22 to Aug. 18, 1968 0 1969 Feb. 25 1969 20,000 14.18 Aug. 23, 25, 26, 1969 0 1970 Mar. 2 1970 1,570 8.53 Many days 0 Period of record: Maxin urn discharge, 33,100 cfs Feb. 16, 1927 (gage height, 15.6 ft, site and datum then in use) , cfs on basis at in recent years.

DISCHARGE, IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

1 1.5 11 40 12 6.B .2 .60 .40 2.0 0 2 1.3 1. 9.7 30 11 8.2 .2 .5 .60 .50 2.0 0 3 1.0 1. 8.1 24 .5 .2 .0 .3 -.60 .60 1.7 0 4 1.0 . 0 7.8 21 .6 .8 .8 .7 .50 .60 1.5 0 5 .80 0 7.5 19 .4 .8 .6 .2 .60 .50 1.4 0 6 .80 1. 6.7 17 1 .8 B q .1 .60 .60 1.4 0 7 .90 1. 6.B 17 2 .1 .0 ^9 .60 .40, 1.0 0 8 1.0 1. 6.3 15 18 .3 .0 .9 .50 .40 .60 0 9 1.1 2 , 13 14 14 .4 . I .1 .80 5*0 .60 0 10 1.2 2. 45 15 13 .4 2 .8 1.0 .50 .50 0 11 1.3 2. 58 12 12 .5 >3 .8 .90 .50 .20 0 12 1.3 2 , 30 12 11 .6 .5 t f .70 .40 .20 0 13 1.3 2. 24 13 11 .7 6 ,4 .50 .20 .50 0 14 1.3 3. 21 13 10 .5 .4 ,4 .50 .10 .70 0 15 1.3 5 B 22 12 9.8 .8 3 B I .50 0 .70 0 16 1.1 7. 26 11 11 7.9 .3 .0 .40 0 .30 0 17 1.0 8. 2B 11 9.2 8.1 .5 .1 .40 0 .10 0 18 .90 f f 21 11 8.5 8.2 .8 .9 .40 0 0 0 19 .80 6. 17 9.9 9.2 8.2 .8 .4 .40 0 0 0 20 .70 * 15 11 9.6 8.1 .9 .0 .30 0 0 0 21 .70 3.8 14 12 9.3 7.9 .8 .7 .30 .40 0 0 22 .80 30 16 11 8.9 8.0 .7 .8 .30 .90 0 0 23 1.0 1,700 15 12 9.6 7.3 8 .0 .30 1.0 0 0 24 1.1 78 13 12 8.6 6.9 .1 .0 .20 .70 0 0 25 1.1 39 12 V> 8.2 8.2 .9 .6 .20 .40 , 0 0

26 .90 28 11 11 8.5 12 .0 .8 .20 0'.10 0 0 27 2.1 20 10 12 8.3 11 .5 .9 .20 0 .40 28 1.7 15 9.9 12 7.5 7.3 .2 .8 .10 0 0 .60 29 1.3 12 94 12 6.1 .1 .4 .10 .10 0 .70 30 1.0 11 839 12 5.6 .7 .80 0 2.1 0 ' .BO 31 1.0 63 11 5.4 .70 2.2 TOTAL 3.4.30 2,001.10 1,480.8 454.9 304.7 236.1 10 .5 70.00 13.30 14.20 15.40 2.50 MEAN 1.11 66.7 47.8 14.7 10.9 7.62 3 52 2.26 .44 .46 .50 .083 MAX 2.1 1,700 839 40 23 12 .5 3,7 1.0 2.2 2.0 .80 KIN .70 .30 6.3 9.9 7.5 5.4 .9 .70 0 ' 0 0 0 AC-FT 68 3.970 2.940 902 26 28 31 5.0 SANTA MARGARITA RIVER BASIN

11044500 SANTA MARGARITA RIVER NEAR FALLBROOK, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 .90 1.2 2.5 8.6 23 7.3 13 12 6.9 2.8 1.0 .04 2 .90 1.1 2.7 8.8 22 7.3 14 12 6.3 2.6 .87 .30 3 1.1 1.2 8.1 8.4 20 7.4 11 12 5.8 2.6 .78 .63 18 8.9 11 13 5.5 2.7 .81 1.1 5 1.4 1.7 69 8.7 17 9.2 18 14 5.2 2.3 .79 1.0

6 1.6 1.9 706 8.6 16 9.5 13 13 5.0 2.3 .87 .77 7 1.6 3.9 857 8.5 16 6.5 12 5.3 2.3 1.0 .70 8 1.5 5.6 85 8.1 14 6.8 11 5.4 2.3 1.0 .66 9 1.5 5.3 49 7.7 14 6.9 ID 5.7 2.2 .93 .65 ID 2.5 3.3 36 7.7 14 6.9 9.7 6.0 2.1 .79 .63 11 2.9 2.9 30 7.7 13- 8.3 38 6.1 2.1 .74 .55 12 2.7 2.8 26 8.0 12 9.3 45 6.5 2.2 .67 .53 13 2.2 2.6 22 8.1 12 15 26 7.0 2.4 .64 .61 1.7 2.5 21 7.7 12 39 19 B.9 2.0 .67 .66 7.7 11 18 17 7.9 1.5 .82 .71

16 1.3 2.5 18 7.7 11 14 15 7.0 1.3 .87 .79 17 1.2 2.5 17 8.1 10 12 13 6.7 1.3 .81 .81 18 1.1 2.4 16 8.9 9.6 11 12 7.3 1.3 .65 1.0 19 1.1 2.4 16 7.9 9.8 10 18 8.0 1.2 .56 1.1 20 1.1 2.4 16 7.7 9.5 9.4 17 7.1 1.3 .47 1.1 21 1.3 2.6 16 7.7 6.8 6.3 15 4.9 1.2 .49 .99 22 1.5 2.4 13 17 8.8 8.2 18 4.5 1.1 .59 .98 23 1.5 2.5 10 84 8.8 B.O 17 4.2 1.1 .60 .0 24 1.6 2.5 11 50 8.B 6.6 15 3.8 1.1 .56 .1 25 1.5 2.5 9.3 502 8.2 8.6 14 3.5 1.1 .55 .2

26 1.5 2.5 9.8 72 8.1 7.9 13 3.4 .88 .49 .8 27 1.4 2.5 9.2 43 7.8 8.0 12 3.1 .86 .46 .5 28 1.7 2.2 9.6 34 7.3 8.3 12 2.8 .63 .36 .4 29 1.8 2.3 9.2 29 10 13 2.7 .78 .26 .4 30 1.7 2.3 9.2 27 11 12 2.8 .84 .18 .3 31 1.5 8.9 27 12 1.1 .05 TOTAL 4B.20 76.9 2.160.9 1,055.7 350.7 321. B 483.7 220.8 165.3 51.71 20.33 27.21 .66 .91 MAX 2.9 5.6 857 8.9 2.8 1.0 1.8 MIN .90 1.1 .05 .04 AC-FT 40 54

DISCHARGE. IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY OCT NOV DEC JAN FE8 MAg APR MAY JUN JUL AUG SEP 1 1.7 2 1.3 .50 0 1.7 3 1.3 1.8 3.0 5.1 5.3 3.6 5.6 1.8 .94 .46 0 1.6 4 1.3 1.8 .92 .42 0 1.5 5 .93 .38 0 1.5 6 1.2 .96 .35 0 1.4 7 8 1.2 2.0 5.0 4.7 5.1 34 3.6 1.7 1.4 .30 0 1.2 9 3.4 1.8 1.6 .27 0 1.1 10 1.1 1.9 4.6 4.8 5.4 11 2.8 l.B 1.4 .25 0 .98 11 1.1 l.B 4.9 4.B 5.3 7.1 3.0 1.8 1.1 .23 0 1.0 12 1.1 1.8 5.2 4.7 5.3 5.9 3.1 2.0 .65 .21 0 1.2 13 1.1 .77 .19 0 1.3 14 1.1 .72 .18 0 1.3 15 .96 .68 .16 0 1.4

16 .92 .15 0 1.5 17 .77 1.2 7.1 4.B 5.3 4.8 3.2 1.9 .67 .14 0 1.4 IB .77 1.2 9.6 4.7 5.3 4.8 3.3 1.7 .68 .13 0 1.6 19 .84 20 .94

21 .80 .10 .97 l.B 22 .47 1.1 1.9 23 .36 1.2 1.5 24 .33 1.3 1.2 25 1.4 .33 1.2 1.0 26 1.5 1.8 .36 1.1 1.2 27 .48 .99 1.4 28 1.8 1.9 .56 .78 1.6 29 .66 1.3 1.9 30 1.4 2.0 5.5 4.6 2.6 2.3 .90 .58 d 1.4 2.0 31 1.3 5.6 4.7 2.7 .83 0 1.7 T07AL 37.80 60.0 212.9 146.2 147.9 176.2 97.0 49.75 25.05 5.52 14.08 43.58 MEAN 1.22 2.00 6.87 4.72 5.10 5.6B 3.23 1.60 .84- .IB .45 1.45 MAX 1.8 4.2 23 5.6 6.1 34 6.4 2.3 1.6 .54 1.7 2.0 MIN .77 1.2 2.1 4.0 4.1 2.6 2.3 .83 .33 0 0 .98 50 11 28 86 CAL YR 1967 TOTAL 3.007 .95 MEAN 8.24 MAX 502 MIN .04 AC-FT 5.970 SANTA MARGARITA RIVER BASIN

11044500 SANTA MARGARITA RIVER NEAR FALLBROOK, CALIF. --CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1961 TO SEPTEMBER 1969 DAY 3CT NOV 4 JUL AUG

1 .1 2.1 2.6 2.9 31 670 2B 14 B. .3 1.4 2 .1 2.1 2.7 3.2 26 558 27 14 8. .9 1.2 3 .1 2.0 2.7 2.9 22 437 28 14 B. .4 1.1 4 .4 2.1 2.6 2.9 20 282 27 15 7. .2 1.1 5 .3 2.0 2.4 3.0 49 198 29 16 7. .3 .90 6 .3 2.0 2.5 3.1 1,380 161 39 20 8. .4 .65 7 .3 2.0 2.6 2.9 549 140 28 17 8. .6 1.1 8 .2 .72 2.6 2.9 146 116 25 15 7. .2 1.5 9 .1 1.1 2.7 2.9 77 103 23 14 8. .9 1.2 10 .3 1.8 2.9 2.9 57 123 24 13 8. .7 .90 11 .1 1.8 3.3 2.9 44 140 23 12 8. .8 .76 12 .1 1.9 3.5 2.9 38 92 21 12 8. .2 .57 13 .1 2.1 3.4 2.9 33 104 21 12 8. .7 .45 14 .1 2.3 3.3 5.6 27 112 20 12 7. .3 .44 15 19 11 7. .1 .70

16 .0 3.5 3.0 4.3 62 64 18 11 7. .1 .73 17 .9 3.1 3.1 3.6 32 59 17 11 7. .9 .4B 18 .8 2.8 3.1 3.4 64 55 17 11 7. .9 .41 19 .6 2.8 3.1 4.1 243 50 17 11 7. .7 .44 20 .7 2.7 3.4 6.3 243 47 16 11 7. .8 .36 21 <8 2.6 3.3 20 106 64 16 11 7. .2 .21 22 .6 2.7 2.9 71 435 114 16 11 7. m 1 .11 23 .7 2.8 2.8 10 363 65 16 10 7. .6 0 24 .6 2.8 - 2.8 11 7,060 50 15 10 7. .9 .01 25 .6 2.9 3.4 3,110 10,100 40 15 10 6. .2 0 26 .7 2.8 ,1 0 27 .7 2.8 4.4 545 1,110 33 13 8.9 5. .4 .04 28 .8 2.6 3.7 139 762 31 13 B.9 5. .1 .20 29 .8 2.3 3.3 77 . 30 13 B.2 5. .0 .53 30 .0 2.5 3.3 50 ~____* 29 13 8.1 4. .9 .83 31 1 2.9 38 30 _____ B.I .7 1.0

TOTAL 6 .4 70.72 95.7 5,223.5 25,554 4,109 611 369.9 218. 7 .8 19.54 21.50 .72 MAX .4 3.5 4.4 3,110 10,100 670 39 20 8. .3 1.5 1.8 MIN .6 .72 2.4 2.9 20 29 13 B.I 4. .7 0 .05 t 56 39 43

1 .79 1.2 3.8 5.6 5.8 390 6.2 4.5 .2 .03 2 .93 1.4 3.9 5.6 5.7 947 5.9 4.0 .7 3 .2 1.4 4.2 5.5 5.6 175 5.8 3.5 .0 4 ..1 1.5 4.1 5.7 5.7 28 5.6 2.3 .1 5 .85 1.5 4.1 5.6 5.8 200 5.3 2.5 .2 6 .79 2.4 4.3 4.9 5.6 38 5.1 2.9 .7 7 .79 4.9 4.2 4.8 5.3 18 4.9 3.2 .3 e .93 5.6 4.4 4.9 5.1 13 4.6 3.1 .6 9 .4 4.9 4.8 6.4 5.5 11 4.3 2.8 .9 10 .8 5.8 4.7 8.7 14 11 4.0 2.3 .6 .06

11 .5 5.2 4.4 8.3 20 9.9 3.9 2.5 .6 .10 12 .5 4.2 4.2 8.9 11 8.6 3.5 3.0 .6 .OB 13 .5 3.4 4.0 8.1 7.8 8.0 3.2 2.9 .8 .06 14 .8 .6 .04 15 .1

16 .1 5.1 4.2 10 6.0 6.6 3.1 2.2 .6 .02 17 .4 4.7 4.3 10 5.9 6.2 3.2 2.1 .97 .04 18 .2 3.4 4.3 B.I 5.B 6.0 3.5 2.1 .79 .04 20 .1 2.6 4.3 7.4 5.4 5.7 3.B 2.1 .72 0

22 .5 3.9 4.5 7.3 5.1 6.1 4.0 1.9 .64 0 23 .5 .49 0

25 .8 .21 0 26 .9 3.B 4.6 7.5 3.9 6.2 4.3 2.6 .12 .05 28 .1 3.3 4.8 6. 88 6.4 5.2 3.1 .05 .08 29 .8 3.3 4.8 5. 5.7 5.5 2.B .04 .04 30 .5 3.7 5.1 5. _____ 6.1 5.1 2.5 .03 0

TOTAL 4 .18 105.9 137.4 216. 264.3 1,970.9 129.6 Bl.B 3' .28 .61 MAX 2.1 5.8 5.5 10 B8 947 6.2 4.5 2.2 .10 MIN .79 1.2 3.8 4.8 3.9 5.6 2.8 1.9 .03 0 AC-FT 84 210 273 429 524 3,910 257 162 68 1.6 100 MAX 10, 100 MIN 0 AC-FT 72,380 SANTA MARGARITA RIVER BASIN

11044900 DE LUZ CREEK NEAR FALLBROOK, CALIF. LOCATION. --Lat 33°22'10", long 117°19'15", in NWtNE'i; sec. 29, T. 9 S. , R. 4 W. , San Diego County, on left bank

DRAINAGE AREA. --47. 5 sq mi. PERIOD OF RECORD. --February 19S1 to September 1967 (discontinued). GAGE. --Water-stage recorder. Altitude of gage is 150 ft (from topographic map). Prior to Dec. 23, 1958, at site 750 ft upstream at present datum. AVERAGE DISCHARGE. --16 years, 4.66 cfs (3,370 acre-ft per year); median of yearly mean discharges, 1.1 cfs (800 acre-ft per year). EXTREMES. --Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (200 cfs), water years 1966-67 Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 22, 1965 2300 *1,930 9.10 Dec. 6, 1966 1930 "1,080 8.02 Jan. 24, 1967 1930 705 7.35 Dec. 29, 1965 2000 1,030 7.94 No flow for most of time in each year. Period of record: Maximum discharge, 2,800 cfs Apr. 1, 1958 (gage height, 9.95 ft, at present site, from floodmarks), from rating curve extended above 450 cfs on basis of slope-area measurement of peak flow; no flow

REMARKS.--Records fair. No regulation or diversion above station. REVISIONS.--WSP 1928: Drainage area. DISCHARGE , IN CUBIC DAY OCT MOV DEC

1 0 3.7 52 8.6 >t .30 2 D 3.7 44 8.2 .1 , .30 3 0 4.0 40 8.6 .1 . .30 4 0 3.4 35 ' 8.2 .a . .30 5 0 3.2 29 8.2 .a .20 6 C 2.8 28 12 .2 .80 .20 7 0 2.4 26 1 .7 .80 .20 B 0 2.2 25 1 .0 .70 .20 9 C 3.0 23 .9 .8 .70 .20 10 0 14 22 .0 .8 .60 .20

11 C 13 22 .2 .0 .40 .20 12 0 11 20 .2 .4 .30 .20 13 0 11 19 .2 .4 .30 .20 14 0 13 IB .4 .2 .30 .20 15 0 17 IB .4 .a .40 .20 16 0 26 16 .4 a .40 .20 17 0 22 16 .0 .a .40 .10 ia 0 17 15 .7 .6 .40 .10 19 0 16 15 .4 .4 .40 .10 20 0 16 14 .4 .2 .40 .10

21 0 16 13 .4 .8 .40 .10 22 244 16 13 .0 .0 .30 .10 23 164 15 12 .7 .6 .30 .10 24 30 14 12 .4 .8 .30 .10 25 22 15 11 .4 .9 .30 .10 2h 19 13 11 .4 .9 .30 .10 27 15 1* 10 .1 .8 .30 .10 28 12 13 9.0 .1 .6 .30 .10 29 8.6 188 8.6 .5 .20 .10 30 5.7 67 H . .5 .30 .10 311 S3 10 .2 .6 IS. BO 5.00 0 MEAN 17.3 20.3 19.9 7.77 2 86 .53 .16 0 MAX 244 188 52 15 .1 1.1 .30 0 KIN 0 2.2 8.6 5.1 .2 .20 0 0 AC-FT 1,030 1,250 1 ,230 431 76 31 9.9 0 I SANTA MARGARITA RIVER BASIN

11044900 DE LUZ CREEK NEAR FALLBROOK, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

JUN JUL

1 C 2.4 30 3.0 .4 6.0 .4 .30 2 0 2.6 29 2.6 .0 5.7 .5 .30 3 0 2.8 29 3.2 .4 5.7 .4 .30 4 0 2.8 29 2.8 .2 5.7 .2 .30 5 25 2.8 28 2.4 .2 5.7 .0 .30 6 255 2.8 26 2.4 .4 5.7 .80 .30 7 92 2. 25 2.4 .4 5.1 .80 .30 8 109 2. 24 2.4 .0 4.8 .80 .20 9 93 2. 22 2.2 .0 4.8 .80 .20 10 71 2. 20 2.2 .2 5.4 .60 .20 11 64 2. 18 2.2 .1 5.1 .50 .20 12 58 2. 17 2.6 .8 5.1 .40 .20 13 50 2. 16 6.0 .4 4.5 .40 .20 14 45 2. 15 6.0 .7 4.2 .30 .20 15 40 2. 14 4.0 .4 3.7 .30 .20

16 35 2. 13 3.2 .4 3.4 .30 .20 17 30 2. 12 3.2 .4 3.2 .30 .20 18 25 2. 9.4 3.0 .7 3.0 .30 .20 19 20 2. 8.2 3.2 .7 3.0 .30 .20 20 15 2. 6.7 3.4 .4 3.0 .30 .10 21 10 2. 5.7 3.2 .0 2.6 .30 .10 22 7. 9. 5.7 3.0 1 2.4 .30 .10 23 5. . 57 5.1 3.2 .8 l.B .30 .10 24 4. 137 4.5 3.2 .7 i.a .30 .10 25 4. 221 4.0 3.2 .4 1.8 .30 .10 26 3. 85 3.0 3.0 >4 1.6 .30 .10 27 3. 66 3.0 2.8 .0 1.8 .30 .10 28 3. 51 2.6 2.8 .0 1.8 .30 0 29 2. 37 2.8 .0 1.6 .30 0 30 2. 31 2.4 .0 1.5 .30 0 1.4 0 112.9 16.70 5.30 KEAN 0 0'34. 25.1 15.2 3.D7 5.55 3.64 .56 .17 PAX 0 0 25 221 30 6.0 12 6.0 1.5 .30 MIN 0 0 2.0 2.6 2.2 3.0 1.4 .30 0 AC-FT 0 0 2,130 1,550 843 189 330 224 33 11 CAL YR 1966 TOTAL 2,020.00 MEAN 5.53 MAX 255 MIN 0 AC-FT 4,010 SANTA MARGARITA RIVER BASIN 99

11046000 SANTA MARGARITA RIVER AT YSIDORA, CALIF. LOCATION.--Lat 33"14'13", long 117°23'14", in NEJjSWtNEJi; sec.10, T.ll S., R.S W., San Diego County, on Camp Joseph 1. Pendleton Naval Reservation, on left bank 1.7 miles upstream from mouth and 2.0 miles southwest of Ysidora. Prior to Feb. 25, 1970, at site 0.8 mile upstream. DRAINAGE AREA.--740 sq mi. Area at site used prior to Feb. 25, 1970, 739 sq mi. PERIOD OF RECORD,--February 1923 to September 1970. GAGE.--Water-stage recorder. Datum of gage is 5.00 ft below mean sea level (U.S. Navy reference mark). See WSP 1928 for history of changes prior to Nov. 28, 193S. Nov. 27, 193S, to Feb. 25, 1970, at site 0.8 mile upstream at different datum. AVERAGE DISCHARGE.--47 years, 29.0 cfs (21,010 acre-ft per year); median of yearly mean discharges, 8.0 cfs [5,800 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water years .1966-70 are contained in the following table:

Wtr yr Date Discharge G.H. Date 1966 Nov. 23, 1965 8,400 a!2.25 Most of tin 1967 Dec. 7, 1966 6,720 312.83 do. 1968 (b) Entire year 1969 Feb. 25, 1969 19,200 15.89 Most of tiir 1970 Mar. 2, 1970 1,940 ell.15 do. a Site and datura then in use. b No flow for entire year. c Maximum gage height, 13.40 ft Mar. 2, 1970, backwater from road fill. Period of record: Maximum discharge, 33,600 cfs Feb. 16, 1927 (gage height, 18.00 ft, site and datum t in use), on basis of slope-area measurement of peak flow; no flow for part of most years. REMARKS.--Records fair. Flow partly regulated by Vail Lake since November 1948 (see station 11042500). Dive sions for irrigation on Rancho California (formerly Santa Margarita Ranch and Pauba Ranch). Conservation pools, 0.9 mile upstream, detain low flow. AVERAGE DISCHARGE represents flow to ocean during period of in reports of the REVISIONS.--WSP 1928:

DISCHARGE, IN CUBIC FEET PER SECOND, NATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

1 0 105 13 .6 .70 2 0 70 11 .6 .70 3 0 37 9.3 .2 .70 4 0 33 7.4 .6 .60 5 0 24 5.2 .0 .60

6 0 26 7.4 .8 .50 7 0 22 30 .6 .50 B 0 22 48 .4 .50.50' 9 0 IB 30 .2 10 0 8.6 33 .2 .50 11 0 11 20 .2 .50 12 0 14 24 .0 .40 13 0 14 28 .2 .40 14 0 14 24 .6 .40 15 0 14 16 .8 .40

16 0 12 9.3 .2 .40 .10 17 0 10 6.2 .2 .40 .10 IB 0 8. 4.3 .1 .40 .10 19 0 8. 3.2 .0 .30 .10 20 0 8. 2.6 .0 .30 .10 21 0 8. 2.3 1.0 .30 22 0 7. 2.3 .80 .30 .10 23 1,020 6. 3.6 .80 .30 .10 24 199 6. 2.9 .80 .30 .10 25 19 5. 2.6 .70 .30 .10 26 4.3 4. 6.2 .70 .20 27 2.6 5. 4.3 .70 .20 28 2.3 6. 3.6 .70 .20 29 2.3 5. .TO .20 30 l.B 1.020 13 :-_ .70 .20 31 124 18 .70 ------TOTAL 1,251.3 1,201 566.2 359.7 46.80 12.20 MEAN 41.7 38 18.3 12.8 1.51 .41 MAX 1.020 1,0 105 48 3.6 .70 MIN 0 1 4.7 2.3 .70 .20 AC-F1

NTR YR 1966 TOTAL 3,441.60 MEAN 9.43 MAX 1,020 MIN 0 AC -FT 6,830 SANTA MARGARITA RIVER BASIN

11046000 SANTA MARGARITA RIVER AT YSIDORA, CALIF.--CONTINUED

DAY JUL

1 0 .9 57 11 B.6 16 .30 .20 2 0 .6 60 10 9.3 16 .30 .20 3 0 .6 55 8. 8.6 16 .30 .20 4 0 .6 40 6. 8.0 5.1 .30 .20 5 0 .9 33 5. 7.4 .10 .30 .20 6 0 .2 30 5. 7.4 .30 .30 .20 7 1,720 8 179 .0 28 5. 7.4- .30 .30 .10 9 50 .8 26 6. 6.2 .30 .30 .10 10 50 .B 26 6. 5.7 .30 .30 .10

11 35 .6 26 4. 12 .30 .30 .10 12 14 .8 24 3. 18 .30 .30 .10 13 16 .8 24 4. 22 .30 .20 .10 14 22 .8 22 20 22 .40 .20 .10 15 20 .0 22 18 20 .40 .20 .10 16 16 .0 22 20 18 .40 .20 0 17 14 .8 18 20 18 .40 .20 0 18 10 .6 16 18 18 . 0 .20 0 19 9.3 .6 16 16 22 . 0 .20 0 20 8.6 .6 14 16 24 . 0 .20 0 21 8.6 .8 13 14 22 . 0 .20 0 22 8.0 .9 13 11 20 . 0 .20 0 23 8.0 3 13 11 18 .40 .20 0 24 6.2 6 13 12 18 .40 .20 0 25 5.2 64 13 11 26 .40 .20 0

26 4.7 26 12 10 24 .40 .20 0 27 3.9 13 11 8.6 18 .40 .20 0 28 2.9 10 10 7.4 16 .40 .20 0 29 3.6 78 6.8 16 .40 .20 0 30 3.6 62 5.2 14 .40 .20 0 31 6.8 .40 0 TOTAL 0 0 2,221.8 1,487.3 686 314.1 462.0 62.80 7.20 2.20 MEAN 0 0 71.7 48.0 24.5 10.1 15.4 2.03 .24 .071 MAX .30 .20 000 1.6 10 0 AC-FT 4.4

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

NOV DEC JAN FEB MAR APR MAY JUN JUL

TOTAL 0000 0 0 MEAN 0000 0 0 MAX 0000 0 0 MIN 0000 0 0 AC-FT 0000 0 0

MTR'VR 1968 TOTAL 0.00 MEAN .00 MAX .0 MIN 0 AC-FT SANTA MARGARITA RIVER BASIN

11046000 SANTA MARGARITA RIVER AT YSIDORA, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, HATER YESR OCTOBER 1968 TO SEPTEMBER 1969 JUN JUL AUG SEP 1 0 88 484 76 25 .3 .65 .38 .35 2 0 72 439 74 24 .1 .64 .37 .35 3 0 66 400 72 23 .0 .62 .37 .35 4 0 45 361 71 22 .8 .61 .37 .35 5 C 39 322 69 21 .5 .60 .37 .35 6 0 Ii880 290 68 20 .4 .59 .37 .33 7 0 1,570 260 66 18 .3 .SB .37 .33 9 0 258 23C 63 16 .9 .55 .37 .33 10 0 177 219 62 14 .8 .54 .37 .33 11 0 15C 20C 60 14 .7 .53 .37 .30 12 0 102 185 59 13 .5 .52 .37 .30 13 0 88 170 56 12 .4 .51 .37 .30 14 13 72 158 54 11 .4 .50 .37 .30 15 0 64 148 52 10 .3 .49 .37 .30 16 0 117 138 17 0 10C 130 18 0 111 118 45 B. .0 .47 .36 .28 19 0 300 108 43 7. .C .47 .36 .28

21 0 22 0 23 0 521 110 35 5. .86 .45 .36 .26 25 3,850 16,400 86 33 5. .79 .43 .36 .28

27 1,480 514 82 30 .73 .42 .36 .33 28 509 500 80 29 4. .71 .41 .35 .27 30 159 .22 31 118 76 3. .39 .35

ESN C C 0 353 1,439 184 50.5 11. L.52 .50 .36 .30 AX C 000 C-FT 0 7C ) 91 31 22 18 0

NOTE. NO GAGE-HEIGHT RECORD FEB. 24 TO SEPT. 30.

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 CAY OCT NCV DEC 1 .22 .24 .21 .28 .28 3.1 2.4 .22 .14 .11 .01 2 .22 .24 .21 .28 .28 886 1.7 .22 .14 .11 0 3 .22 .24 .21 .28 .28 350 1.4 .22 .14 .11 0 4 .22 .24 .21 .29 .28 98 1.4 .22 .14 .11 0 5 .22 .24 .21 .29 .28 245 1.5 .22 .14 .11 0 6 .22 .24 .21 .29 .28 226 1.2 .22 .14 .08 0 7 .22 .24 .21 .29 .28 123 1.1 .22 .14 .08 0 8 .22 .24 .22 .29 .28 65 .99 .22 .14 .08 0 q .22 .24 .22 .29 .26 45 .88 .22 .14 .08 0 10 .22 .24 .22 .29 .28 35 .77 .22 .14 .08 0 11 .22 .23 .22 .29 .32 33 .77 8 .14 .08 0 12 .22 .23 .23 .29 .32 24 .68 8 .14 .08 0 13 .22 .23 .23 .29 .32 18 .68 B .14 .OB 0 14 .23 .23 .23 .29 .32 18 .68 8 .14 .08 0 15 .23 .23 .23 .29 .32 17 .68 8 .14 .08 0 16 .23 .23 .24 .29 .32 15 .68 8 .14 .OB 0 17 .23 .23 .24 .29 .32 12 .68 8 .11 .08 0 18 .23 .23 .24 .29 .32 9.5 .60 8 .11 .08 0 19 .23 .22 .24 .29 .32 5.9 .60 8 .11 .08 0 20 .23 .22 .25 .29 .32 4.9 .52 8 .11 .08 0 21 .23 .22 .25 .28 .32 4.0 .45 8 .11 .08 0 22 .23 .22 .25 .28 .32 3.8 .45 8 .11 .08 0 23 .23 .22 .25 .28 .32 3.5 .45 8 .11 .08 0 24 .24 .22 .26 .28 .32 3.3 .38 8 .11 .06 0 25 .24 .22 .26 .28 .32 3.0 .38 8 .11 .06 0 26 .24 .22 .26 .28 .32 3.0 .38 8 .11 .06 0 27 .24 .21 .26 .28 .32 3.0 .32 8 .11 .06 0 28 .24 .21 .27 .28 .68 2.8 .32 8 .11 .06 0 2S .24 .21 .27 .28 .... 2.8 .27 4 .11 .06 0 30 .24 .21 .27 .28 _____ 2.8 .27 4 .11 .04 0 31 .24 .27 .28 2.6 4 .02 0 TOTAL 7.08 6.84 7.35 8.85 8.92 2,268.0 23.58 5. 6 3.78 2.41 .01 0 MEAN 0 MAX .24 .24 .27 .29 .68 886 2.4 2 .14 .11 .01 0 KIN .22 .21 .21 .28 .28 2.6 .27 4 .11 .02 0 0 AC-FT 14 14 15 18 IB 4,500 47 12 7.5 4.8 .02 0 ,400 WIN 0 AC-FT 116,800

NOTE. NO GAGE-HEIGHT RECORD OCT. 1 TO FEB. 25. LAS FLORES CREEK BASIN

11046100 LAS FLORES CREEK NEAR OCEANSIDE, CALIF. LOCATION. --Lat 33°17'32", long 117°27'21", in NWsSE't sec. 24, T.IO S., R.b W. , San Diego County, Camp Joseph H.

0.5 mile upstream from mouth and 8.5 miles northwest of Oceanside. DRAINAGE AREA. --26. 6 sq mi.

PERIOD OF RECORD. --May 1951 to September 1967, October 1969 to September 1970.

recorder and multiple concrete culvert control. Altitude of gage is 35 ft (from topographic

AVERAGE DISCHARGE.--17 years, 0.70 cfs (507 acre-ft per year); median of yearly mean discharges, 0.3 cfs (220 acre-ft per year).

1966-67, 1970 are contained in the following table: Annual maximum discharge (*), peak discharges above base (100 cfs), and annual minimum discha Minimum daily Wtr y r Date Time Discharge G.H. Date Dischai 1966 Nov. 22, 1965 2300 *421 2. 27 Most of time 0 Dec. 29, 1965 2300 102 .88 1967 Dec. 6, 1966 *848 4.19 do. 0 Jan . 24, 1967 2300 156 1.17 1970 Feb. 28, 1970 2100 *24 1.04 do. pth de termination of peak flow; long periods

REMAR th t ' 1 000 ft t th s, 1966-67, 1970 amounted to 38, 70, and 651 acre-ft, respectively. No

DISCHARGE, IN CUBIC

1.6 .30 .20 .10

114 .60 2.0 .60 .40 .60

31

TOTAL 144.20 2.70 MEAN 4.81 .087 PAX 114 1.6 PIN AC-FT LAS FLORES CREEK BASIN

11046100 LAS FLORES CREEK NEAR OCEANSIDE, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1966 TO SEPTEMBER 196T

NOV DEC JAN FEB MAR APR MAY JUN JUl

CO C .10

1.0 .50 .20 .20 .20

0

TOTAL 0 0 400.70 24.80 0 .30 .21 HE AN 0 0 12.9 .80 0 .010 .00: MAX 0 0 200 IT 0 .20 .11 KIN 0 0 0 0 0 0 ( AC-FT 0 0 T95 49 0 .6

DISCHARGE. IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 OCT NOV DEC JUN JUL AUG SEP .03 .C4 .01 .02 .01 .56 .02 .01 .01 .01 .02 .01 .03 .04 .01 .01 .01 4l8 .02 .01 .01 .01 .02 .01 .03 .04 .01 .02 .01 .16 .02 .01 .02 .02 .02 .01 .03 .03 .01 .02 .01 .28 .02 .01 .02 .01 .02 .01

.03 .06 .01 .02 .01 .16 .02 .01 .01 .01 .02 .01 .03 .03 .01 .02 .01 .12 .02 .01 .01 .01 .02 .01 .04 .02 .01 .02 .01 .10 .02 .01 .01 .01 .02 .01 .04 .02 .02 .02 .01 .08 .02 .01 .01 .02 .02 .01 .04 .03 .01 .02 .06 .06 .02 .01 .01 .02 .02 .02 .04 .02 .01 .03 .02 .05 .02 .01 .01 .02 .02 .02 .01 .01 .01 .02 .02 .02 .03 .01 .01 .02 .01 .02 .01 .01 .01 .02 .02 .01

.01 .01 .01

.01 .02 .01 .01 .C2 .01 .02 .01 .01 .01 .01 .02 .01

MAX .04 .06 .02 .04 1.6 MIN .03 .01 .01 .01 .01 AC-FT 2.2 1.1 .7 1.1 3.9

MAX 4.8 MIN .01 104 SAN ONOFRE CREEK BASIN

11046200 SAN ONOFRE CREEK NEAR SAN ONOFRE, CALIF. LOCATION.--Lat 33°23'23", long 117°30'50", in SE^SWH sec.16, T.9 S., R.6 W., San Diego County, on left bank Onofre, and 5 miles upstream from mouth. DRAINAGE AREA.--34. 6 sq mi. PERIOD OF RECORD.--October 1950 to September 1967 (discontinued). GAGE.--Water-stage recorder. Altitude of gage is 170 ft (from topographic map). Prior to June 22, 1957, at datum 1.00 ft higher. June 22, 1957, to Oct. 7, 1960, at site 50 ft upstream at present datum. AVERAGE DISCHARGE.--17 years, 2.53 cfs (1,830 acre-ft per year); median of yearly mean discharges, 0.5 cfs (360 acre-ft per year).

Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 22, 1965 1730 *1,310 5.55 Dec. 6, 1966 1900 *1,600 5.40 Jan. 24, 1967 2200 425 2.98 Dec. 29, 1965 1930 790 4.20 No flow for several months in each year. Period of record: Maximum discharge, 2,680 cfs Apr. 1, 1958 (gage height, 5.90 ft), from rating curve

REMARKS. --Records good. No regulation o diversion above stati Since November 1954, U.S. Navy disposal plant discharges into creek 1.5 miles upstr

DISCHARGE i IN CUBIC FEET PER SECOND; MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY JUN JUL AUG SEP 1 0 .60 3 .6 .6 .BO .70 .20 .20 .20 2 0 .30 3 .1 .8 .80 .70 .20 .20 .20 I 0 .20 2 .6 .4 .80 .70 .20 .20 .10 4 0 .20 1 .4 .4 .80 .70 .20 .20 .10 5 0 .20 1 .2 .4 .80 .70 .20 .20 .10

6 0 .20 .1 2 .4 .80 .70 .20 .20 .10 ^ 0 .20 .2 2 .2 .80 .70 .20 .20 .10 a 0 .20 .7 1 . I .80 .60 .20 .20 .10 9 0 .30 .4 .6 .90 .80 .60 .20 .20 .10 10 c 17 .6 .2 .90 .80 .60 .20 .20 0 11 0 9 .6 .9 .0 .90 .80 .60 .20 .20 0 12 0 11 . 2 .9 .90 .80 .60 .20 .20 0 13 0 11 .6 .2 .80 .80 .50 .20 .20 0 14 0 21 .4 .6 .80 .80 .50 .20 .20 0 15 0 17 1 .4 .70 .80 .50 .20 .20 0 16 0 57 .a .1 .70 .80 .50 .20 .20 a 17 e 32 6 .8 .70 .80 .50 .20 .20 0 18 0 28 , 2 .8 .70 .80 .40 .20 .20 0 19 0 18 .4 .6 .70 .80 .40 .20 .20 0 20 0 17 1 .4 .70 .80 .40 .20 .20 0 21 0 15 .2 .2 .70 .80 .40 .20 .20 0 22 305 13 .0 .0 .70 .80 .40 .20 .20 0 23 16? 11 .0 .0 .70 .80 .30 .20 .20 0 24 19 9 .1 . 8 .0 .70 .70 .30 .20 .20 0 25 21 8 .6 .6 .8 .70 .70 .30 .20 .20 0

26 7.7 8 .2 .6 .8 .70 .70 .30 .20 .20 0 27 3.1 7 .7 .8 .6 .80 .70 .30 .20 .20 0 28 1.2 7 .2 .6 .6 .80 .70 .20 .20 .20 0 29 .80 129 .6 .80 .70 .20 .20 .20 0 30 .80 80 1 . 80 .70 .20 .20 .20 0 31 39 .20 .20 0 TOTAL 0 521.60 568 .80 225.9 137.5 28.90 23.30 14.70 6.00 6.20 1.10 0 0 PAX 0 305 129 35 25 1.8 .80 .70 .20 .20 .20 0 HIN 0 0 .20 1.6 1.6 .70 .70 .20 .20 .20 0 0 AC-FT 0 1.030 1, 2.2 0 SAN ONOFRE CREEK BASIN

H046200 SAN ONOFRE CREEK NEAR SAN ONOFRE, CALIF. --CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

JUN JUL AUG SEP

1 0 1 .50 .30 .10 2 C 1 .2 8 .4 1.4 2.4 .90 .50 .30 .10 3 30 1 .1 .4 1.1 2.2 .80 .50 .30 .10 4 .10 .90 '.4 1.4 2.2 .80 .50 .30 .10 5 5*1 .90 .2 .90 2.2 .80 .50 .20 .10

6 762 .90 .1 .80 2.0 .80 .50 .20 .10 7 141 .90 .1 .30 2.0 .80 .40 .20 .10 8 32 .90 .1 .20 2.0 .80 .30 .20 .10 9 24 .90 .1 .20 2.0 .80 .30 .20 .10 10 18 .90 .90 1.1 2.4 .80 .30 .20 .10

11 14 .90 .90 .2 2.0 .80 .30 .20 .10 12 11 .90 .90 .6 2.0 .80 .30 .20 .10 13 - 8. .90 .9 .6 2.0 .80 .30 .20 .10 14 .90 ^ f 4 2.0 .80 .30 .20 .10 15 .90 .0 .0 2.0 .80 .30 .20 .10

16 .90 .6 .8 2.0 .90 .30 .20 .10 17 .90 .2 .8 2.0 .90 .30 .20 .10 IB .90 . I .2 2.0 .80 .30 .10 .10 19 .80 . 1 .6 2.2 .80 .30 .10 .10 20 .80 .90 .6 2.2 .80 .30 .10 .10

21 .80 .90 .1 2.2 .80 .30 .10 .10 22 20 .90 .6 2.2 .80 .30 .10 .10 23 19 .90 .6 2.4 .80 .30 .10 .10 24 94 .90 .6 2.6 .80 .30 .10 .10 25 89 .90 .9 2.6 .80 .30 .10 .10

26 37 .90 .2 2.4 .80 .30 .10 .10 27 25 .90 .6 2.4 .70 .30 .10 .10 28 20 .90 .6 2.6 .60 .30 .10 .10 15 .4 1.6 .60 .30 .10 .10 30 14 _____ J,g .1 1.4 .50 .30 .10 .10 3! 12 2.1 1.1 .30 .10

TOTAL 0 0 1,652.00 364 .50 102.8 40.20 8 .40 66.1 23.60 10.60 5.20 3.00 MEAN 0 0 53.3 11.8 3.67 1.30 .81 2.13 .79 .34 .17 .10 KAX 0 0 762 .50 .30 .10 MIN 000 .80 1.4 .90 .20 1.1 .50 .30 .10 .10 AC-FT 0 C 3,280 723 204 80 ' 167 131 47 21 10 6.0

CAL YD 1966 TOTAL 2,09$. 60 MEAN 5.74 MAX 762 MIN 0 AC-FT 4,160 106 SAN ONOFRE CREEK BASIN

11046250 SAN ONOFRE CREEK AT SAN ONOFRE, CALIF. LOCATION.--Lat 33°23'00", long 117°34'22", in SEVSEijSEV sec.14, T.9 S. , R.7 W. , San Diego County, on left bank 0.2 mile north of San Onofre, 0.3 mile ujpstream from Interstate Highway 5, and 0.5 mile upstream from mouth.

DRAINAGE AREA.--42.2 sq mi. PERIOD OF RECORD.--October 1946 to September 1967 (discontinued). GAGE.--Water-stage recorder. Altitude of gage is 15 ft (from topographic map). AVERAGE DISCHARGE.--21 years, 1.44 cfs (1,040 acre-ft per year); median of yearly mean discharges, 0.05 cfs (36 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (150 cfs), water years 1966-67

Date Time Disch. G.H. Date Disch. G.H. Date Time Disch. Nov. 22, 196S 2400 1,500 7.83 Dec. 6, 1966 *a2,000 7.59 Jan. 24, 1967 2300 540 Dec. 29, 1965 2030 *a2,410 9.14 a Result of detention dam failure. No flow for most of time in each year. Period of record: Maximum discharge, 2,600 cfs Apr. 1, 1958 (gage height, 6.90 ft); no flow for all or most of each year. REMARKS.--Records fair. No regulation above station. Detention basins above station for ground-water recharge. Pumping above station for irrigation and water supply.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1967

>40V. 2 , 1965.... 18 JAN. , 1966.... 20 DEC. 9, 1966.... 70 JAN. 23, 1967. 6 ...... 18 24...... 50 DEC. .80 1 ...... 1.9 2...... 7 .0 26...... :::::::::: i 3 ...... 6.7 3...... 4 .0 27...... 4...... 2 .0 28...... 28 .50 ...... 20 .30 30...... 80 ...... 5 DEC. .20 1.9 JAN...... 333 .10 24...... 2.8 JAN. 2, 1967.... 3 .1

CFS-DAY > MAXIMUM MINIMUM MEAN RUNOFF IN ACRE-FEET NOVEMB R 1965 36S.5 1 186 0 12.3 731 IECEMB 0 2S1.2 3 116 0 9.07 558 CAL 753.7 ) 186 0 2. 8& 1,490 JANUAR 145.6 36 0 -4.70 289 FEBRUA 67 28 .0 2.39 133 WTR S62.3 ) 186 0 2.36" 1,710

DECEMB 1,971.2 5 887 0 63.6 3,910 CAL 1 2,183.8 ) 887 0 5.98 4,330 JANUAR 337.8 5 142 0 10.9 670 5.0 2.8 0 .17 9.S 2,314.0 5 887 0 6.34 4,590

NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. SAN MATED CREEK BASIN

11046300 SAN MATED CREEK NEAR SAN CLEMENTE, CALIF. LOCATION.--Lat 33°28'15", long 117°28'20", in SEINE'6 sec.23, T.8 S. , R. 6 W. , San Diego County, on left bank 0.4 mile downstream from mouth of Devil Canyon and 8.6 miles northeast of San Clemente. DRAINAGE AREA.--80.8 sq mi. PERIOD OF RECORD.--October 1952 to September 1967 (discontinued). GAGE.--Water-stage recorder with rain-gage attachment. Altitude of gage is 405 ft (from topographic map). AVERAGE DISCHARGE.--15 years, 7.30 cfs (5,280 acre-ft per year); median of yearly mean discharges, 1.9 cfs (1,400 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (200 cfs), water years 1966-67 Date Time! Disch. G.H. Date Disch. G.H. Date Time Disch. Nov. 22, 1965 2230 5,070 10.14 Dec. 6, 1966 *7,300 10.45 Jan. 24, 1967 2130 1,090 Dec. 29, 1965 2100 3,460 9.24 No flow for long periods in each year. Period of record: Maximum discharge, 7,300 cfs Dec. 6, 1966 (gage height, 10.45 ft), from rating curve extended above 1,800 cfs on basis of slope-area measurement at gage height 10.14 ft; no flow for several months in each year. REMARKS,.--Records fair. No regulation or diversion above station. Rainfall data are available in files of dis- trier, office.

REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

NOV DEC

0 11 84 16 11 .9 .6 0 11 76 16 12 .9 .4 0 10 69 16 11 .9 .4 0 8.9 60 14 10 .9 .4 0 7.8 56 14 10 .9 .4 0 6.6 55 26 9.6 .5 .3 0 5.5 51 32 9.6 .5 .3 0 5.2 48 27 9.3 .2 .3 0 6.4 45 22 8.9 .2 .6 0 33 43 21 8.5 .0 .6

0 22 41 20 8.5 .0 .6 0 24 38 19 8.2 .8 .6 0 31 35 18 8.2 .8 .4 0 33 34 18 7.8 .4 .2 0 44 33 18 7.8 .1 .1 0 60 31 18 7.5 .1 .90 0 48 30 17 7.2 .1 .80 0 36 28 17 7.2 .1 .60 27 16 6.9 .1 .50 0 24 6.6' 0 16 27 16 .9 .40 0 12 25 15 6.6 .7 .40 1,180 12 24 14 6.6 .6 .30 690 10 23 14 6.1 .4 .30 83 8.5 22 13 6.4 .2 .20 55 8.2 22 13 6.6 .9 .20

22 7.8 21 13 6.6 .9 .30 14 7.2 20 12 6.4 .9 .40 14 6.9 20 11 6.4 .9 .30 13 646 18 6.1 .8 .20 12 208 26 ______5.8 .8 .20 31 74 20 5.5 .10

TOTAL 2,083 1,444.0 1,152 486 244.9 10 .4 27.30 MEAN 69.4 46.6 37.2 17.4 7.90 3 35 .88 MAX 1,180 646 84 32 12 .9 1.6 MIN 0 5.2 18 11 5.5 .8 .10 AC-FT 4,130 2.860 2,280 964 486 99 54 L 4,080. 70 MEAN 11.2 MAX 1,180 MIN 0 AC-FT 8,090 SAN MATED CREEK BASIN

11046300 SAN MATED CREEK NEAR SAN CLEMENTE, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

GCT NOV DEC JAN FEB MAR APR MAY JUN JUL

,570 902 165 112

31

TOTAL 5.C92.0 WEAN 164 KAX 2,570 237 KIN 8.5 AC-FT 2,060 SAN MATED CREEK BASIN

11046350 CRISTIANITOS CREEK NEAR SAN CLEMENTE, CALIF. LOCATION.--Lat 33 8 26'57", long 117°34'13", in SWVJWs sec.25, T.8 S., R.7 V., San Diego County, on right bank 900 ft downstream from Talenga Canyon, 2.3 miles upstream from mouth, and 2.8 miles northeast of San Clemente. DRAINAGE AREA.--29.0 sq mi. PERIOD OF RECORD.--October 1950 to September 1967 (discontinued). GAGE.--Water-stage recorder. Altitude of gage is 165 ft (from topographic map). Prior to Sept. 19, 1952, at datum 3.92 ft higher. AVERAGE DISCHARGE.--17 years, 1.55 cfs (1,120 acre-ft per year); median, of yearly mean discharges, 0.4 cfs (290 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, and gage height in feet). . Annual maximum discharge (*) and peak discharges above base (100 cfs), water years 1966-67 Date Time Disch. G.H. Date Disch. Date Time Nov. 22, 1965. 2300 *1,060 7.50 Dec. 6, 1966 *1,730 Jan. 24, 1967 2200 Dec. 29, 1965 2130 450 6.20 No flow for long periods in each year. Period of record: Maximum discharge, 1,800 cfs Jan. 16, 1952 (gage height, 8.86 ft, present datum), from rating curve extended above 360 cfs on basis of slope-area measurement of peak flow; no flow for several months in each year. REMARKS.--Records fair. No regulation or diversion above station. REVISIONS.--WSP 1928: Drainage area. DISCHARGEt IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NCV DEC JAN FEB MAR APR MAY JUN ML I 0 0 14 3 .8 2. .60 .10 .10 2 0 0 8. 3 .2 2. .50 .10 3 0 0 4. 3 .0 1. .40 .10 4 0 c 2. 2 .8 1. .40 .20 5 0 G l t 2 .8 1. .30 .10 6 0 0 1. 23 I. .30 .10 7 0 C I, 12 1. .20 .10 8 0 C 1. S .3 1. .20 .20 9 0 0 1. 3 .8 1. .20 .20 10 0 9.9 ! 3 .a i. .20 .20 11 0 .70 1. 3 .0 I. .10 .20 12 0 .30 1. 2 .6 1. .10 .20 13 0 .70 1. 2 .5 1. 0 .10 14 0 .30 I. 2 .5 1. 0 .20 1$ 0 .20 1. 2 .5 1. 0 .10 16 0 5.7 1. 2 .8 I. 0 .10 17 .10 1.4 1. 2 .8 1. 0 .10 18 0 .80 1. 2 .8 1. 0 .10 19 0 .50 1. 2 .a i. 0 .10 20 0 .30 2. 2 .8 1. 0 .10 21 0 .30 j. 3 .0 '.80 0 .10 22 216 .30 2. 3 .0 .80 0 .10 23 103 .20 1. 3 .0 .80 0 .10 24 21 .10 1 f 3 .0 .80 0 .20 25 12 .10 j^ 2 .8 .70 0 .20 26 .50 .10 2^ 2 .8 .70 0 .20 27 0 .10 2. 2 .5 .70 0 .30 28 0 .10 1. 2 .5 .70 0 .20 29 0 41 I, »_ .BO 0 .20 30 0 8.4 .80 0 .10 0 31 1.4 4.9 .70 TOTAL 0 352.60 72.90 90.1 113 .4 39.70 3.50 4.50 .10 MEAN 0 11.8 2.35 2.91 4. OS 1.28 .12 .15 .003 KAX 0 216 41 16 23 2.5 .60 .30 .10 KIN 0 0 0 1.0 2 .5 .70 0 .10 0 AC-FT 0 699 145 179 225 79 6.9 8.9 .2 CAL YR 1965 TOTAL 452.00 MEAN 1.24 MAX 216 MIN 0 AC-FT 897 SAN MATED CREEK BASIN

11046350 CRISTIANITOS CREEK NEAR SAN CLEMENTE, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL

I 1. 4 .0 .8 3.4 1.0 .30 .30 2 1 1 3 .8 2.8 .90 .30 .30 3 .6 1. 3 .5 1.3 .90 .30 .30 4 .9 2. 3 .2 1.3 .80 .30 .30 5 36 2. 3 .0 1.2 .70 .30 6 37 j^ 3 .0 .90 .70 .20 7 5 2, 3 .0 .90 .70 .20 B 1 2. 2 .8 .80 .70 .30 9 1 3, 2 .8 .70 .70 .30 10 .6 3. 2 .8 .70 .70 .30

11 3. 2 .5 3.7 .60 .30 .20 12 3. 2 .5 2.4 .50 .30 .20 13 . 3. 2 .5 1.5 .40 .30 14 3. 2 .3 1.0 .40 .30 15 3. 2 .3 .90 .40 .30

16 . 3. 2 .3 .90 .40 .40 .20 17 . 3. 2 .3 .90 .40 .40 .20 18 . 3. 2 .3 . .90 .40 .30 .20 19 . 3. 2 .3 .2 .40 .30 .20 20 . 3. 1 .9 .4 .40 .30 .20

21 -i 3.2 1 .9 .6 .30 .30 22 18 1 .9 .0 .30 .30 .20 23 18 1 .9 .8 .20 .30 .20 24 47 1 ,9 .0 .20 .30 .20 25 28 1 .9 .5 .30 .30

26 11 1 .9 .3 .30 .30 27 8.B 1 .9 .2 .30 .30 .20 28 7.2 1 .9 .90 .30 .30 .20 29 . 5.6 .0 .30 .30 .20 30 4.9 .2 .30 .30 J! _____ 4.9 .30

TOTAL 0 0 86 ,2 211.4 70 .3 5 » 4 .30 15.20 9.00 51 1 9 .=>o .49 .30 MAX 0 0 373 47 4 .« 3.7 1.0 .40 MIN 000 1.6 1 .9 .70 .20 .20 AC-FT 0 0 1,720 419 139 15 94 30 IB SAN MATED CREEK BASIN

11046370 SAN MATED CREEK AT SAN ONOFRE, CALIF. LOCATION.--Lat 33°23'46", long 117°35'21", in NWWPaNtft sec.14, T.9 S. , R. 7 W. , San Diego County, on right bank 0.3 mile upstream from Interstate Highway 5, 0.8 mile upstream from mouth, 1.3 miles northwest of San Onofre, and 2.2 miles downstream from Cristianitos Creek. DRAINAGE AREA.--132 sq mi. PERIOD OF RECORD.--October 1946 to September 1967 (discontinued). GAGE.--Water-stage recorder. Altitude of gage is 20 ft (from topographic map). AVERAGE DISCHARGE.--21 years, 5.53 cfs (4,000 acre-ft per year); median of yearly mean discharges, 0.04 cfs (29 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (150 cfs), water years 1966-67 Date Time Disch. G.H. Date Time Disch. G.H. Date G.H. Nov. 22, 1965 2300 *aS,500 8.13 Dec. 5, 1966 1100 alO.OOO 10.42 Jan. 24, 1967 3.40 Dec. 29, 1965 2030 a3,840 6.22 Dec. 6, 1966 2100 6,950 7.80 a Result of detention dam failure. No flow for 1 ng periods in each year. Period of ecord: Maximum discharge, 10,000 cfs Dec. 5, 1966 (gage height, 10.42 ft), result of detention dam failure; o flow for all or several months in each year. REMARKS.--Records fair. No gage-height record Dec. 31, 1965, to Jan. 6, 1966. or flows regulated by deten- tion basins. No diversion above station. REVISIONS.--WSP 1928: Drainage area. DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

0 0 90 4.8 .5 .30 0 0 80 2.4 .7 .40 0 0 70 .90 .5 .40 0 0 60 .40 .3 .30 0 0 50 .30 .1 .30 0 0 45 14 .9 .20 0 0 40 38 .7 .20 0 0 33 14 .4 .20 0 0 30 7.6 .2 .20 0 13 27 11 .2 .20 0 4.2 26 11 .0 .20 0 .80 24 9.4 .8 .30 0 .50 20 7.6 .6 .10 0 .50 17 3.6 .6 .10 0 5.3 14 .50 .5 .10 0 31 11 .50 1.4 .10 0 43 8. .50 .90 .10 0 20 5. .50 .80 .10 0 13 2. 1.3 .70 .10 0 11 2. 1.4 .60 .10 0 9.4 1. 2.7 .60 .10 268 8.7 1. 2.7 .50 .10 911 7.9 .50 2.7 .60 .10 59 6.1 .50 3.3 .50 0 65 4.5 .40 3.3 .50 0 23 3.3 .40 3.3 .40 0 3.0 1.9 .40 3.3 .40 0 .30 1.3 .30 3.3 .30 .10 0 290 .30 i . 40 .10 0 373 10 . 30 0 31 100 10 . 20 TOTAL 0 1,329.30 948.40 678.80 154.30 47.10 4. SO MEAN 0 44.3 30.6 21.9 5.51 1.52 .15 MAX 0 911 373 90 38 3.7 .40 MIN 0 0 0 .30 .30 .20 0 AC-FT 0 2,640 1,880 1.350 306 93 8.9 TOTAL 2,277 .70 MEAN 6.24 MAX 911 MIN 0 AC-FT 4,520 TOTAL 3,162 .40 MEAN 8.66 MAX 911 MIN 0 AC-FT 6,270 SAN MATED CREEK BASIN

11046370 SAN MATED CREEK AT SAN ONOFRE, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 NQV DEC JAN FEB MAR APR MAY JUN JUL 1 0 10 42 B.4 14 28 . 2 0 9. 37 8.4 IB 25 . 3 0 6. 32 6.B 13 22 . 4 0 7. 29 9.8 11 21 5 1,280 T. 28 9.8 11 20 6 2,760 6. 26 B.8 9.8 IB B 7 774 6. 22 8.4 9.3 16 . B 278 6. 22 7.2 8.4 15 . 9 201 5, 22 7.2 7.2 15 , 10 160 5. 22 7.2 7.2 15 11 132 5. 20 6.B 37 14 B 12 110 7. 19 6.8 64 13 . 13 90 6. 18 11 43 11 . 14 75 6. IB 23 32 10 , 15 63 6. 16 14 28 ' 9.3 16 54 6. 16 13 22 .6 ^ 17 46 5. 15 8.B IB .6 . IB 40 5. 15 8.4 16 .8 . 19 35 6. 13 8.0 37 .2 . 20 32 5. 12 7.6 44 .8 21 27 6.0 12 7.2 35 .8 B 22 24 24 12 7.2 107 .8 . 23 22 89 11 7.2 82 .8 . 24 20 171 9.B 6.8 66 .4 25 18 400 9.3 6.B 55 * 26 16 97 8.8. 6.8 48 .0 . 27 15 78 8.4 6.B 41 .0 . 28 14 70 8.4 6.8 37 .0 . 29 13 56 ______6.4 35 0 , 30 12 50 6.0 31 .0 . 31 11 46 ______7.2 ______.0 TOTAL 0 0 6,322 1 ,218.0 523.7 266.6 986.9 355.5 9 . MEAN 0 0 204 39.3 18.7 B.60 32.9 11.5 3 0 MAX 0 0 2,760 400 42 23 107 28 . KIN 000 5.2 8.4 6.0 7.2 5.2 . AC-FT 0 0 12,540 2,420 1,040 529 1,960 705 184 CAL YR 1966 TOTAL 7,206.70 MEAN 19.7 MAX 2,760 HIN 0 AC-FT 14,290 SAN JUAN CREEK BASIN

11046500 SAN JUAN CREEK NEAR SAN JUAN CAPISTRANO, CALIF. LOCATION.--Lat 33°29'30", long 117 0 39'44", in SWsSEWs sec.12, T.8 S. , R.8 W., Orange County, on left bank at Camino Capistrano bridge, 0.2 mile upstream from Arroyo Trabuco and 0.6 mile south of San Juan Capistrano. Prior to Dec. 10, 1969, at site 2.8 miles upstream. DRAINAGE AREA.---117 sq Area at site used prior to Dec. 10, 1969, 106 sq PERIOD OF RECORD.--October 1928 to September 1970. Combined records of creek and diversion October 1954 to September 1970. GAGE.--Water-stage recorder on creek; water-stage recorder and Parshall flume on diversion. Datum of gage is 59.21 ft above mean sea level. See WSP 1928 for history of changes prior to Dec. 18, 1941. Dec. 17, 1941, to Dec. 9, 1969, at site 2.8 miles upstream at different datum. AVERAGE DISCHARGE.--42 years (creek only), 13.8 cfs (10,000 acre-ft per year); median of yearly mean discharges, 2.8 cfs (2,000 acre-ft per year). 16 years (combined flow), 14.6 cfs'(10,580 acre-ft per year); median of yearly mean discharges, 3.7 cfs (2,700 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). -Annual maximum discharge (*) and peak discharges above base (200 cfs), water years 1966-70 Creek only Wtr yr Da e Time Discharge G.H. Date Discharge 1966 No . 22, 1965 2330 4,080 6.60 Nov. 22, 1965 4,080 De . 29, 1965 2230 1,950 4.20 Dec. 29, 1965 1,950 1967 De . 6, 1966 1930 *9,000 5.38 Dec. 6, 1966 9,000 24, 1967 4,500 Ja 24, 1967 2000 4,500 Jan. 366 1968 Ma 8, 1968 1345 366 3.13 Mar. 8, 1968 1969 Ja . 21, 1969 1700 1,160 3.33 Jan. 21, 1969 1,160 Jai . 25, 1969 1300 13,000 5.42 Jan. 25, 1969 13,000 Fe 6, 1969 1415 2,200 2.97 Feb. 6, 1969 2,200 Feb. 25, 1969 22,400 Fe . 25, 1969 1100 *22,400 aS.6 *125 1970 Ma 4, 1970 2315 *12S 3.01 Mar. 4, 1970 a From floodmarks, site and datum then in use. Annual minimum daily discharge, water years 1966-70

Creek only Combined Wtr yr Date Discharge Date Discharge 1966 Many days 0 Many days 1967 Oct. 3-9, 17-29, 1966 0 Oct. 3-9, 17-19, 21-29, 1966 1968 May 30 to Sept. 30, 1968 Many days 1969 Oct. 1 to Nov. 14, 1968 Oct. 1 to Nov. 14, 1968 1970 Sept.23-25, 1970 Sept.14-16, 1970 Period of record: Maximum discharge (creek only), 22,400 cfs Feb. 25, 1969 (gage height, 5.6 ft, from floodmarks, site and datum then in use), from rating curve'extended above 1,200 cfs on basis of slope-area measurement of peak flow; no flow at times in most years. Maximum discharge (combined flow), 22,400 cfs Feb. 25, 1969; no flow for many days in 1961-69. REMARKS.--Records fair except those for water year 1969, which are poor. No gage-height record Feb. 24 to Sept. 30, 1969. No regulation above station. See tables given herein for records of combined discharge of creek and Capistrano Water Co.'s canal, which diverts 500 ft above station. COOPERATION.--One hundred thirty-four discharge measurements furnished by Orange County Flood Control District. REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG

1 3.2 90 20 14 .1 2.1 .30 ? 3.0 50 40 IB .9 2.2 1.0 .20 31 2.B 45 30 13 .6 2.1 1.0 0 4 2.6 42 25 12 .5 2.1 1.0 0 -' 2.4 40 20 11 .0 2.0 1.0 .10 t 2.2 3B 40 10 .8 1.9 1 2.0 35 35 10 .8 1.5 8 1.8 32 30 10 .B 1.4 9 2.0 2B 25 10 .7 1.4 1C 8.0 22 20 10 .6 1.6 1] 4.8 19 IB .B .0 1.6 12 4.1 17 18 .8 .9 1.7 131 6.0 15 li .B .7 1.8 I'l 5.2 14 17 .6 .4 1.7 I'j 4.8 13 17 .1 ,q l.B Id 9.4 12 16 .6 .7 1.8 17 5.6 11 16 .4 .7 1.9 18 5.6 10 16 .1 .6 1.4 19 5.6 10 15 .2 .3 1.1 20 6.0 9.5 15 .7 .B 1.2 21 4.8 9.0 15 >? .8 1.3 22 25 5.6 8.5 15 .7 .0 1.6 .40 23 99 4.4 B.O 14 .2 .1 l.B .40 24 10 4.4 7.5 14 .8 .7 1.7 .30 2S 9 4.1 7.0 14 .2 ^q 1.6 .20

26 3 4.1 7.0 14 .2 .0 1.9 1.0 27 1 4.1 7.0 14 ,2 .8 l.B .90 28 .4 3.8 6.7 14 .2 ^4 1.7 .80 2<> .B 205 SO _ . .B .9 2.2 30 .4 617 30 _.. .9 .9 2.1 31 162 20 .6 2.0 .30

41.50 17.60 2.60 MEAN 0 50.5 35. 7 23.0 20.1 9.02 3 31 1.74 1.3B .57 .084 .023 MAX 0 997 617 90 40 18 .1 2.2 2.6 1.0 .30 .20 MIN 0 0 1.8 6.7 14 5.6 .9 1.1 .80 .20 AC-FT 0 3,000 2,19(1 1,410 1,120 555 97 107 82 35 CAI. YR 1965 TOTAL 2,686.90 MEAN 7.36 SAN JUAN CREEK BASIN

11046500 SAN JUAN CREEK NEAR SAN JUAN CAPISTRANO, CALIF.--CONTINUED

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SE

1 .10 .80 1.5 24 DU 13 2 .10 .80 1.6 23 55 13 108 31 7.4 .4 1.5 .5 3 0 .70 121 21 50 13 41 27 6.1 .0 1.1 .6 * 0 .70 63 20 45 13 22 27 5.5 .0 1.1 .7 5 0 .80 1,220 18 40 13 23 24 7.1 .0 .97 .8

6 0 .1 3,500 17 36 12 IB 25 6.5 .8 .97 .8 7 0 .5 1,000 16 35 12 15 22 7.6 .7 1.1 .9 8 0 .9 400 15 34 12 15 21 7.7 .7 1.0 9 0 .1 200 14 33 11 13 20 8.4 .8 1.0 10 .20 .2 120 13 32 10 11 24 8.9 .4 .94

11 .30 .3 100 13 31 16 20 21 12 .2 .86 12 .30 .4 80 13 30 17 12 19 11 .9 .75 13 .20 .3 65 13 29 27 11 18 10 .8 - .82 14 .10 .8 55 13 28 69 12 16 9.4 .6 .83 15 .10 .8 50 13 27 36 12 15 10 .5 .83

16 .10 .6 45 13 26 27 14 14 11 .4 .81 17 0 .8 42 14 24 25 14 13 9.7 .3 .77 IB 0 .7 40 14 22 25 24 13 7.6 .2 .64 19 0 .0 33 13 21 25 65 13 7.9 .99 .58 20 0 .1 36 li 20 24 66 13 5.9 .86 .72 21 0 .5 34 11 19 19 59 13 4.2 .90 .80 22 0 .4 31 42 18 17 74. 11 3.6 .86 .71 23 0 .1 30 140 IB 11 72 12 3.5 .78 .58 24 0 .8 31 800 17 11 67 11 4.2 .87 .48 25 0 .5 30 338 17 11 58 11 3.9 .82 .38 26 0 .3 30 160 17 11 52 11 3.2 .74 .36 27 0 .0 28 130 16 ' 12 50 12 3.9 .78 .59 28 0 .6 28 110 16 12 49 13 3.0 .81 .59 29 0 .6 27 90 20 45 14 2.6 .77 .47 30 .20 .4 27 75 21 39 13 2.6 .84 .45 31 .70 25 65 38

1,158 541 203.9 43.12 24.90 33.0 MEAN .077 2.12 242 73.3 29.1 19.2 38.6 17.5 6.80 1.39 .80 1.1 MAX .70 3.5 3,500 BOO 60 69 108 33 12 2.4 1.7 1. MIN 0 .70 1.5 11 16 10 11 11 2.6 .74 .36 .4 AC- FT 4.B 126 14,870 4 ,510 1,620 1,180 2,300 1,070 40*4 86 49 6

WTR YR

EAR OCTOBER 1967 TO SEPTEMBER 1968

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SE

1 1.7 1.2 15 6.4 .9 2.6 3.2 .81 2 1.5 1.3 9.0 5..4 .1 2.6 7.0 .79 3 4 1.5 1.8 6.5 5.1 .4 2.9 2.7 .81 5 2.1 .73

6 1.4 2.4 5.8 6.3 .2 2.6 1.9 .68 7 1.3 a 2.Z .61 9 1.4 3.0 5.6 6.1 .6 43 2.7 .53 10 1.1 3.1 5.6 5.8 .7 12 1.4 .49 11 1.2 3.1 5.4 5.4 .7 7.6 1.2 .45 12 1.1 3.2 5.3 4.9 .4 6.3 1.3 .47 13 1.1 3.0 5.5 5.1 .2 6.5 1.5 .46 14 15 1.1 2.7 5.0 5.2 .7 4.8 1.9 .42 16 .97 2.5 5.3 4.8 .8 4.8 1.9 .36 17 .89 2.4 5.8 4.9 .5 5.5 1.5 .30 IB .83 2.4 17 4.8 .7 5.1 1.1 .28 19 .78 13 32 4.7 .3 4.0 1.2 .26 20 .85 48 26 4.9 .4 3.4 1.5 .22

21 .91 38 15 5.2 .7 2.9 1.6 .22 22 .96 i 9 9.9 4.8 .7 2.0 1.2 .19 23 .99 2 8.1 4.2 .6 2.1 .93 .18 24 .1 8.2 7.7 3.8 .4 2.4 .84 .18 25 .1 7.1 6.8 2.4 .4 2.5 .81 .15 26 .2 7.0 6.4 1.9 .3 2.1 .74 .10 27 .9 2.0 .83 .09 .80 .06 29 .79 .02 30 .3 10 6.4 2.6 2.7 .BO 0 31 .2 6.4 4.0 - 3.2 TOTAL 0 > MEAN 1.19 i.56 8.73 4.72 3.92 7.78 1.76 .38 0 MAX 1.7 48 32 6.6 5.2 87 7.0 .82 0'0 MIN .78 1.2 5.0 1.9 .6 2.0 .74 0 AC-FT 73 509 537 290 226 478 105 23 0

CAL YR 1967 TOTAL 6,253.24 MEAN 17 .1 MAX E 00 MIN .36 . AC-FT 12,400 HTR YR 1968 TOTAL 1,129.97 MEAN 3 .09 MAX 87 MIN 0 AC-FT 2,240 SAN JUAN CREEK BASIN

11046500 SAN JUAN CREEK NEAR SAN JUAN CAPISTRANO, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOB6R 1968 TO SEPTEMBER 1969

JUN JUL AUG

1 0 1.2 157 650 69 33 11 B.I 4.5 1.7 2 0 1.4 117 500 66 32 11 7.4 .5 1.6 3 0 1.4 92 420 100 31 12 6.3 .5 1.5 4 0 .92 B7 342 BO 30 12 6.1 .6 1.4 5 0 .70 B6 310 110 2B 12 5.B .B

6 0 .63 600 2B3 90 27 12 5.5 .8 1.5 7 0 1.0 306 265 79 25 12 5.3 .B 1.6 a 0 1.1 120 250 71 24 13 5.0 .8 1.6 9 0 .96 100 230 65 23 13 4.B .8 1.7 to 0 1.1 99 215 58 22 13 4.6 .5

11 0 1.4 9B 200 55 22 14 4.5 4.7 12 0 2.2 97 191 52 21 14 4.6 4.6 l.B 13 0 2.2 97 175 49 20 14 4.7 4.6 1.9 U 0 2.1 96 165 47 19 14 4.B 4.6 2.0 15 3.0 2.1 95 155 45 18 13 4.B 4.5 2.0

16 2.0 2.2 94 14B 44 IB 13 4.9 4.5 2.0 17 l.B 2.4 92 140 42 17 12 5.0 4.5 2.1 IB 1.6 2.3 90 130 40 17 12 5.0 4.5 2.1 19 1.5 2.5 159 122 3B 16 12 5.0 4.5 2.1 to 1.4 2.1 13S 115 37 16 11 5.0 3.1 2.1 21 1.2 l.B 439 B3 110 36 17 11 5.1 4.0 2.1 22 1.3 2.1 179 165 106 35 IB 11 5.1 4.B 2.2 ,23 1.4 1.9 35 5B3 101 34 17 11 5.1 4.6 2.2 24 1.4 2.0 300 3,500 95 34 16 10 5.1 4.4 2.2 25 1.5 3.1 5,400 6,600 91 34 IS 10 5.1 4.3 2.3 26 1.3 10 2,000 4,000 B6 33 14 9.7 5.1 4.1 2.3 27 .93 3.B 650 1,500 B2 33 13 9.4 5.1 3.9 2.3 2B .97 3.1 203 B70 79 33 12 9.1 4.0 3.8 29 .77 2.9 165 75 33 11 9.0 2.7 4.3 30 .89 2.B 156 74 33 11 B.B 3.5 3.1 31 2.6 196 72 11 4.4 1.9 TOTAL 0 157.5 133.9 58.2 MEAN 0 .77 2.19 316 719 193 52.5 19. B 11.6 5.0B 4.32 1.94 KAX 0 3.0 10 5,400 6,600 650 110 33 14 B.I 4.B 2.3 MIN 0 0 .63 2.0 83 72 33 11 B.B 2.7 1.9 1.4 AC-FT 0 1,220 692 312 266 115 MIN 0 AC-FT 1 .300 HTR YR 1969 TOTAL 38,857.67 MEAN 106 MAX 6,600 MIN 0 AC-FT 77 ,070

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO SEPTEM ER 1970 DAY 0CT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG 1 2 .3 2.0 5.6 4.5 5.3 23 3.B 2. .36 .21 .14 2 2 .3 1.9 5.4 4.3 5.1 62 3.B 1. .57 .51 .25 3 2 .3 1.9 5.2 4.4 4.6 40 3.B 1. .51 .25 .31 4 2 2B 3.5 1. .38 .52 .13 5 2 .2 1.9 5.0 4.6 4.9 57 3.4 . 1 .38 .60 .13

6 2 .2 9.6 4.9 4.5 4.6 22 3.4 . 4 .38 .SO .43 7 2 .2 9.0 4.B 4.5 4.7 11 3.0 1. .68 .35 .58 B 2 .45 .26 .46 9 . 3 .42 .22 .35 10 2 .2 6.4 4.5 5.6 11 B.9 3.6 .97 .35 .20 .21 11 2 .1 6.2 4.2 6.4 12 7.5 3.4 1.1 .26 .19 .10 12 .65 .25 .IB .16 113 2 .1 .66 .55 .15 .10 1* .72 .25 .14 .10 15 2 .1 .73 .25 .13 .11 16 .74 .23 .12 .13 17 2 .1 .74 .20 .11 .28 IB .22 .10 .40 :i9 2 .1 1.3 .19 .10 .52 20 2 .1 .19 .09 .31 21 .23 .09 .53 22 2 .1 6.0 4.9 5.1 4.9 4.5 3.0 1.1 .31 .09 .60 23 .65 .23 .09 .28 24 .37 .21 .09 .38 .25 .49 .56 .09 .19 .Z6 2.B .59 .66 .10 .21 27 2 .0 5.8 4.B 5.4 4.5 3.7 2.7 .93 .73 .10 .43 2B 2 .0 5.B 5.0 5.5 12 3.7 2.6 .89 .91 .11 .51 29 .59 .93 .12 .60 30 2 .0 5.6 4.4 5.6 4.3 2.8 .61 .38 .12 .67 31 2 .0 4.2. 5.1 4.2 .64 .13 .61 TOTAL 65 .6 169.0 145.6 172.1 163.6 373.7 103.9 3 0.15 12.22 6.06 10.21 MEAN 2. 12 5.63 4.70 5.55 5.B4 12.1 3.46 .97 .41 .20 .33 MAX 2 .3 9.6 5.6 B.2 12 62 4.6 2.2 .93 .60 .47 MIN .37 .19 .09 .10 AC-FT 130 335 2B9 341 325 741 206 60 24 12 20 CAL YR 1969 TOTAL 39,146. 90 MEAN 107 MAX 6,600 MIN 1.4 AC-FT 77.650 WTR YR 1970 TOTAL 1,256. 24 MEAN 3.4 MAX 62 MIN .06 AC-FT 2.490 SAN JUAN CREEK BASIN

11046500 SAN JUAN CREEK NEAR SAN JUAN CAPISTRANO, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SAN JUAN CREEK AND CAPISTRANO MATER CO.'S CANAL NEAR SAN JUAN CAPISTRANO , CALIF., WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

10 0 3.2 90 20 14 S.6 3.6 3.2 1.8 .3D 2 .10 0 3.0 V3 40 18 5.5 3.3 3.3 2.2 .20 30 0 2.8 45 30 13 5.2 3.1 3.0 2.0 0 40 0 2.6 42 25 12 5.1 3.3 3.1 1.9 0 9 .10 0 2.4 40 20 11 4.T 3,0 3.S 2.2 .20 6 .20 0 2.2 38 40 10 4.6 2.5 3.0 1.1 .10 TO 0 2.0 35 35 10 4.T 2.3 2.9 1.0 .10 80 0 1.8 32 30 10 4.T 2.4 2.9 .80 .10 90 0 2.0 26 25 10 4.6 2.6 3.0 1.2 .20 10 0 0 8.0 22 20 10 4.6 2.8 2.8 .90 .20 11 0 C 4.8 19 18 9.6 4.6 3.0 2.7 .80 .30 12 0 0 4.1 IT 18 9.6 4.8 3.1 2.9 .70 .30 13 0 0 6.0 15 IT 9.6 4.6 2.6 2.T .60 .40 14 0 0 5.2 14 IT 9.0 4.2 2.6 2.2 .50 .30 .20 15 0 0 4.8 13 IT 8.7 4.1 2.6 2.0 .40 .10 .20 16 0 0 9.4 12 16 8.1 3.3 2.5 1.6 .30 .70 IT 0 0 5.6 11 16 8.9 3.6 2.T 1.8 .50 18 0 0 5.6 10 16 8.6 3.6 2.2 2.2 .60 19 0 0 5.6 10 15 T.T 3.6 2.0 2.8 .60 20 0 0 6.0 9.S IS 8.2 3.0 2.2 2.2 .50 21 ( 0 4.8 9.0 15 6.2 3.3 2.3 2.3 .30 22 ( 251 5.6 8.5 23 ( 99T 4.4 8.0 14- 8.0 3.T 2.6 .4 .40 24 ( 25 ( 9T 4.1 T.O 14 T.8 3.T 2.5 1.9 .20 .10 26 0 36 4.1 T.O 14 7.7 3.5 2.T 2.5 .20 .10 2T 0 14 4.1 T.O 14 T.6 3.2 2.T 2.3 .20 .20 28 0 6.4 3.6 6.T 14 T.6 3.2 2.8 l.T .20 .10 29 0 4.8 205 50 3.1 3.2 1.3 .30 .10 30 0 4.4 61T 30 6*2 3.1 4.2 1.3 .30 .10 31 0 162 20 6.0

TOTAL .40 1,514.6 1,106.4 T13.2 564 288.9 122.7 86.2 7 .6 23.70 3.50 1.10 MEAN 013 50.5 35. T 23.0 20.1 9.32 4.09 2. 78 2 39 .76 .11 .037 MAX .20 99T 61T 90 40 18 5.6 4.2 (.5 2.2 .TO .20 MIN 0 0 l.B 6.T .3 .20 0 0 1,120 ST3 243 1T1 42 47 6.9 2.2

WIR YR 1966 TOTAL 4,496.50 MEAN U.3 MAX 99T MIN 0 AC-FT 8,920

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SAN JUAN CREEK AND CAPISTRANO MATER CO.'S CANAL NEAR SAN JUAN CAPISTRANO , CALIF., WATER YEAR OCTOBER 1966 TO SEPTEMBER 196T

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 .10 .80 2.6 24 60 13 TT 33 12 4.9 l.T . 1 2 .10 .60 2.T 23 55 13 108 31 .9 5.0 1.5 . 6 3 0 .60 121 21 50 13 41 27 .5 4.6 1.1 . 9 4 0 .TO 63 20 45 13 22 27 .6 4.6 1.7 . T 5 0 .80 1,220 18 40 13 23 24 .5 4.3 2.2 . 9 6 C 1. 3.500 17 36 12 19 25 .8 3.5 2.1 T 0 2. 1,000 16 35 12 16 22 .6 3.3 2.7 603. 400 15 34 12 15 21 .5 3.5 2.4 903. 200 14 33 11 14 20 10 3.6 2.S 10 .20 3. 120 13 32 10 12 24 11 3.1 1.8 11 .30 3. 100 13 31 16 21 21 14 3.6 1.1 12 .30 2. 80 13 30 IT 12 19 13 3.1 .83 13 .20 2. 65 13 29 27 11 16 12 3.0 .98 14 .10 3. 55 13 28 69 12 16 11 2.7 1.0 15 .10 3. 50 13 27 36 12 15 12 3.1 .93 16 .10 3. 45 13 26 27 14 16 1 S 3.2 .92 IT 3. 42 14 24 25 14 15 1 4.1 .63 16 3. 40 14 22 25 24 13 .4 .3 .64 19 3. 38 13 21 25 65 13 .5 .0 .58 20 .40 3. 36 12 20 24 66 13 .4 .2 .72 21 4. 34 11 19 20 59 13 .6 .7 .92 22 3. 31 42 18 19 T4 11 .9 .0 .71 23 3. 30 140 16 13 72 12 .8 .0 .58 24 4. 31 600 17 13 67 11 .4 .2 .48 25 3. 30 338 17 13 58 11 .2 .8 .41 26 3. 30 160 IT 13 52 11 .6 .9 .36 2T 2. 2B 130 16 14 50 12 .3 .4 .59 28 2. 28 110 16 14 49 13 .4 .1 .67 29 2. 2T 90 45 15 .0 2.2 .47 30 .20 1. 27 75 21 39 15 .1 2.3 .45 31 .TO 25 65 38 1.5 .50 TOTAL 2.80 80.80 7,501.3 2,273 816 612 1,163 550 258.2 96.0 34.39 5 .12 MEAN .090 2.69 242 73.3 29.1 19.T 38.8 17.7 8.61 3.10 1.11 .67 MAX ' .TO 4.0 3,500 800 60 69 108 33 14 5.0 2.7 9.2 MIN 0 .TO 2.6 11 16 10 11 11 4.0 i:5 .38 .41 AC-FT 5.6 160 14,680 4,510 1,630 1,210 2,310 1,090 512 190 68 99 CAL YR 1966 TOTAL 9,460.00 MEAN 25.9 MAX 3,500 MIN 0 AC-FT 18,760 WTR YR 196T TOTAL 13,437.61 MEAN 36.6 MAX 3,500... MIN 0 AC-FT 26,650 SAN JUAN CREEK BASIN

11046500 SAN JUAN CREEK NEAR SAN JUAN CAPISTRANO, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET P R SECOND, OF SAN JUAN CREEK AND CAPISTRANO WATER CO. NEAR SAN JUAN CAPISTRANO, CALIF., WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

CAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP I 3.0 2.9 15 6.4 4.3 2.8 3.6 2.9 .02 0 0 0 2 2.5 0 0 0 0 3 2.0 0 0 0 0 4 2.1 4.1 6.5 5.1 4.6 3.2 2.8 2.2 0 0 0 0 5 1.8 0 0 0 0 6.3* 6 2.0 4.1 5.8 4.4 2.8 2.5 1.5 0 0 0 0 7 1.4 0 0 0 0 8 2.2 4.1 6.7 6.3 4.1 88 2.7 1.2 0 0 0 .01 9 2.2 3.4 .84 0 0 0 .01 10 2.0 4.0 5.6 5.8 3.8 12 2.7 .69 0 0 .02 .02 11 .68 0 0 .03 .02 12 1.0 0 0 0 0 1) 2.2 4.1 5.5 5.1 5.4 6.5 2.8 .88 0 .01 .02 0 14 .78 0' 0 0 0 15 .61 0 0' 0 0 16 .39 0 0 0 0 17 2.0 3.2 5.8 4.9 4.7 5.5 2.8 .32 0 0 0 0 18 1.7 3.4 17 4.8 4.9 5.1 2.3 .29 .01 0 0 0 19 1.4 34 32 4.7 4.5 4.0 2.4 .26 0 0 0 0 20 1.2 48 26 4.9 3.6 3.9 2.8 .22 .01 0 0 0

21 2.2 38 15 5.2 4.0 3.9 3.0 .22 0 0 0 0 22 2.7 29 9.9 4.8 4.0 3.0 2.4 .19 .01 0 0 .01 23 2.9 12 8.1 4.2 3.9 3.1 2.0 .18 0 0 0 0 2* 2.6 8.2 7.7 3.8 3.7 3.4 1.8 .18 0 0 .03 0 25 2.9 7.1 6.8 3.9 3.7 3.5 1.8 .15 0 0 .03 0 26 3.7 7.0 6.4 4.0 3.6 3.1 2.1 .10 0 0 0 0 27 .09 0 0 0 0 28 .06 0 0 0 0 29 .02 0 0 0 0 30 3.2 10 6.4 4.3 3.5 2.4 0 0 0 0 0 31 3.0 6.4 4.5 3.8 0 .02

TOTAL 76.8 282.2 270.7 157. B 120.7 254.6 83.4 23.82 .05 .01 .15 .07 MEAN 2.48 9.41 8.73 5.09 4.16 8.21 2.78 .77 .002 .0003 .005 .002 MAX 3.7 48 32 6.6 5.4 88 7.2 2.9 .02 .01 .03 .02 KIN 1.2 2.9 5.0 3.8 2.9 2.8 ' 1.8 0 0 0 0 0 AC- FT 152 560 537 313 239 505 165 47 .1 .02 .3 .1

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SAN JUAN CREEK AND CAPISTRANO WATER CO. NEAR SAN JUAN CAPISTRANO, CALIF., WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

OCT NOV 0,'EC JAN FEB MAR APR MAY JUN JUL

1 1.2 2. 157 650 69 33 11 2 1.4 2. 117 500 66 32 11 3 1.4 2 f 92 420 100 31 12 4 .92 2. 87 342 80 30 12 5 .70 2« 86 310 110 28 14 6 .63 2. 600 283 90 27 13 7 1.0 2. 306 265 79 25 13 g 1.1 2, 120 250 71 24 14 9 .96 2. 100 230 65 23 14 10 1.1 2. 99 215 58 22 14

11 1.4 2. 98 200 55 22 14 12 2.2 2, 97 191 52 21 14 13 2.2 2, 97 175 49 20 14 14 2.1 6. 96 165 47 19 14 15 .C 2.1 * 95 155 45 18 13 16 2.2 3^ 94 148 44 18 13 17 2.4 2. 92 140 42 17 12 18 2.3 2 9 90 130 40 17 13 19 2.5 4. 159 122 38 16 13 20 2.1 7. 135 115 37 16 12 21 1.8 439 83 110 36 17 12 22 2.1 179 165 106 35 18 12 23 1.9 35 583 101 34 17 12 24 2.0 300 3,500 95 34 16 11 25 1 3.1 5 ,400 6<600 91 34 15 11 26 1 '. 3 10 2 .000 4.000 86 33 14 11 27 3.8 650 1.500 82 33 13 11 28 . 7 3.1 203 870 79 33 12 11 29 . 7 2.9 165 - 75 33 11 11 30 . 9 . 2.8 156 74 33 11 11 31 2.6 196 72 _____ 11 ----- TOTAL 0 22 . 6 68.01 9 ,784.1 20.118 5,977 1,575 614 373 MEAN 0 . 7 2.19 316 719 193 52.5 19. B 12.4 MAX 0 3.0 10 5.400 6.600 650 110 33 14 MIN 0 0 .63 2.0 83 72 33 11 11

CAL YR 1968 TOTAL 731. 57 MEAN 2.0 MAX 88 MIN 0 AC-FT 1,450 NT* YR 1969 TOTAL 39.035. 37 . MEAN 107 MAX 6,600 MtN 0 AC-FT 77,430 SAN JUAN CREEK BASIN

11046SOO SAN JUAN CREEK NEAR SAN JUAN CAPISTRANO, CALIF. --CONTINUED DISCHARGE, IN CUBIC FEET PER.SECOND, OF SAN JUAN CREEK AND CAPISTRANO WATER CO. NEAR SAN JUAN CAPISTRANO, CALIF., WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

.3 3.5 6. 5.3 23 3.8 2.2 .76 .30 .6 3.5 5. 5.1 62 3.8 1.3 .97 .69 .7 3.4 5. 4.6 40 3.8 1.2 .91 .71 .8 3.4 5. 5.0 28 3.5 1.5 .78 1.2 .8 3.7 5. 4.9 57 3.4 1.8 .78 .72

.9 12 5. 4.6 22 3.4 1.8 .78 .66 .6 10 5. 4.7 11 3.0 2.4 1.1 .45 .85 .37

8.9 3.6 2.2 .72 .90

4.6 7.0 4.< 7 4 12 7.5 3.4 2.0 .69 .90

1.0 4.3 7.1 4.1 7 1 5.6 6.4 3.9 1.3 1.1 .68 1.3 .99 .58 .58 .34 .37 .60 19 4.2 7.1 5.4 6.5 5.1 4.8 4.0 1.8 .81 .42 .72

22 3.8 7.0 6.0 5.8 4.9 4.5 3.0 1.6 .81 .50 .80 .34 .48 .31 .58 25 2.8 6.8 5.8 6.0 5.3 3.9 2.4 .99 .87 .34 .39 26 2.8 .29 .31 .20 .61 29 3.0 6.2 5.8 5.6 4.1 2.9 .99 1.1 .20 .70 30 3.4 6.2 5.4 5.8 4.3 2.8 -1.0 .49 .25 .77 31 3.4 5.2 5.1 nn:: .31 .71

.53 .50 MAX 4.9 12 6.1 9.2 12 62 4.6 2.7 1.5 1.2 .87 .20 .18 AC-FT 245 396 333 389 325 31 CAL YR 1969 TOTAL 39,435.40 NEAN 108 MAX 6,600 NIN 2.0 AC-FT 78,220 SAN JUAN CREEK BASIN

11047000 ARROYO TRABUCO NEAR SAN JUAN CAPISTRANO, CALIF. LOCATION.--Lat 33°31'36", long 117 0 40'08", in NEWEyWi; sec.36, T. 7 S. , R. 8 W. , Orange County, on downstream side of right pier of county road bridge (formerly U.S. Highway 101), 1.8 miles north of San Juan Capistrano. DRAINAGE AREA.--35.7 sq mi. PERIOD OF RECORD.--Octobe 1930 to September 1970. Prior to October 1956, published as Trabuco Creek near San Juan Capistrano. GAGE.--Water-stage recorder. Altitude of gage is 180 ft (from topographic map). Sine 20, 1969, supplemen- tary water-stage recorder at site 0.3 mile upstream at different datum. AVERAGE COMBINED DISCHARGE. --40 years, 5.84 cfs (4,230 acre- ft per year) ; median of yearly mean discharges. 0.5 cfs (360 acre- ft per year). EXTREMES. --Maxiinums and minimums (discharge in cubic feet pe r second, gage height in feet) for the water ye 1966-70 are .ontained in the following t able: Maximum Minimum Wtr yr Date Dis charge G.H. Date Dis 1966 Nov. 23 1965 1,000 3.50 Many days 1967 Dec. 6 1966 3,200 4.25 do. 1968 Nov. 21 1967 16 2.48 do. 1969 Feb. 24 1969 8,000 5.42 do. 1970 Mar. 5 1970 27 2.47 do. Period of record: Maximum discharge, 9,240 cfs Feb. 6, 1937; no flow at times in each year. REMARKS.--No regulation above station. Diversion to spreading grounds by Orange County Flood Control District, at site 0.8 mile upstream, began in February 1966. No diversion during water years 1968-70. COOPERATION.--Records furnished by Orange County Flood Control District. REVISIONS.--WSP 1928: Drainage area.

DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY DCT NOV DEC JAN FEB MAR APR MAY JUN JUL

1.1 9.2 .10 9.2 .50 8.8

.20 .50 1.1 1.4 .90 .70 2.1

9.2 1.4 9.2 3.4 9.2 3.7 9.2 5.3

5.5 6.2 .10 6.9 3.8 .10 8.4 2.T 6.2 8.4 5.4 7.6 6.2

13 245 16

79 206 31 113

TOTAL 4.. 50 433.00 2.10 9.60 30.10 32.6 MEAN .15 14.0 .068 .31 .97 1.09 MAX 1.4 206 1.0 2.9 6.9 6.5 MIN 0 3.8 0 0 AC-FT 8.9 851 432 4.2 19 8.9 851 551 4.2 19

t COMBINED DISCHARGE, IN ACRE-FEET, OF CREEK AND DIVERSION. SAN JUAN CREEK BASIN

11047000 ARROYO TRABUCO NEAR SAN JUAN CAPISTRANO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

DAY OCT NOV

1 0 0 2 0 .10 0 1.4 22 6.2 11 19 5.4 .70 .10 .50 3 0 .10 14 1.2 17 5.8 .4 20 4.6 .50 .10 .50 4 0 0 7.4 1.0 17 5.8 .8 19 3.0 .50 .10 .50 5 0 0 833 1.2 17 5.4 .2 18 2.6 .60 .10 .50

6 0 0 1,370 1.0 17 5.4 .2 16 3.4 .50 .10 .50 7 0 1.6 958 1.6 18 5.4 .2 13 3.0 .40 .10 .40 8 0 0 183 1.9 17 5.0 .2 12 3.0 .20 .10 .40 9 0 0 88 2.6 15 5.0 .2 B.I 4.2 .20 .20 .40 10 0 0 75 2.6 13 5.4 .2 10 4.6 .20 .30 .40

11 G 0 59 2.6 B.8 5.4 3 11 4.2 .80 .40 .40 12 0 0 50 3.0 8.1 5.8 3 11 3.8 1.4 .30 .40 13 0 0 36 4.2 8.8 7.4 2 10 4.2 1.6 .50 .30 14 0 0 31 4.2 9.5 14 24 8.1 3.4 1.8 .70 .30 15 0 0 30 4.2 9.5 B.I 20 6.B 3.0 1.7 .BO .30

16 0 0 26 4.2 9.5 5.4 17 5~.0 3.4 1.5 .90 .30 17 0 0 IB c 0 21 3.4 7.4 5.4 If .8 3.8 1.6 1.0 \ 3 19 0 0 16 3.0 7.4 5.4 31 3.4 1.6 s 1.0 .4 20 0 0 12 3.0 8.8 5.4 3C 3.0 1.6 .90 .41

21 0 0 1.0 .4 22 0 0 10 23 8. 5.0 33 .90 1.6 1.0 .4 23 0 0 9.5 46 B. 3.B 33 l.C .80 1.0 .5 24 0 0 6.2 295 8. 2.2 33 1.0 .10 .90 .50 25 0 0 4.6 197 8. 2.2 3C 1.2 .10 .BO .60

26 0 0 4.2 6B B. 3.4 21 1.2 .10 .80 .70 27 0 0 3.8 44 8. 3.8 21 1.2 .10 .80 .80 28 .10 0 3.B 30 8. ' 3.0 2« 1.2 .10 .60 .60 29 .10 0 3.4 31 2.6 2< 1.4 .10 .60 .50 3C .10 0 3.4 29 2.6 23 1.4 .10 .60 .50 31 0 .90 31 8.1 - ' >l ° .50

TOTAL .30 i.eo MEAN .010 .060 126 27.4 11.8 5.34 20.5 8.71 2.92 .80 .56 .45 MAX .10 1.6 1,370 295 26 14 39 20 5.4 l.B 1.0 .80 MIN 0 C 0 1.0 7.4 2.2 6.2 1.9 .90 .10 .10 .30

It) .6 3.6 7,950 1,910 655 328 1,230 979 393 278 194 163

t COMBINED DISCHARGE, IN ACRE-FEET, OF CREEK AND DIVERSION.

OISCHARCE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1967 TD SEPTEMBER 1968

CAY OCT AUC SEP

1 .60 0 4.2 1.2 .40 .30 10 0 0 0 0 2 .60 0 2.0 1.6 .40 .30 . 10 0 0 0 0 3 .60 0 1.6 1.8 .40 .20 0 0 0 .50 .10 4 .40 0 2.0 1.7 .40 .20 0 0 0 .60 .10 5 .40 0 1.8 1.7 .40 .30 0 0 .40 .50 .20

6 .40 0 1.7 1.8 .40 .40 0 0 0 .20 .20 7 .40 0 1.8 1.2 .40 .50 0 000 .20 e .40 0 1.8 1.7 .40 .6 0 000 .10 9 .50 0 .90 1.8 .50 .0 0 000 0 .10 10 .50 .20 .90 1.8 .40 .4 0 .30 0 0 0 .20

11 .60 .30 1.6 1.8 .40 .0 0 .30 0 .40 0 .20 12 .60 .20 1.6 l.B .50 0 0 0 .40 0 .30 13 .60 .20 1.4 1.6 .50 0 .30 0 0 0 .30 14 .60 .10 1.7 1.1 .50 0 000 0 .20 15 .70 0 l.B 1.6 .50 0 000 0 0

16 .60 0 l.B 1.1 .50 0 000 0 0 17 .60 0 1.1 1.1 .50 0 000 .10 0 IB .60 0 4.6 1.1 .50 0 .40 0 0 .10 0 19 .60 .10 3.8 1.0 .50 0 .40 0 .40 .10 0 20 .60 4.4 2.4 1.0 .60 0 000 0 0

21 .60 7.7 2.2 .90 .60 0 000 0 0 22 .60 7,4 2.2 .80 .70 0 000 0 0 23 .60 3.3 1.4 .70 .70 0 000 0 0 24 .60 3.2 1.4 .60 .70 0 000 0 0 25 .20 2.1 1.4 .50 .30 C 000 0 .20

26 0 1.9 1.8 .40 0 0 0 .30 0 - o .40 27 0 2.7 l.B .40 0 0 000 0 .20 2B 0 1.7 1.8 .40 .20 0 .20 .20 0 0 0 29 0 2.4 1.8 .40 .30 0 .10 0 0 0 0 30 0 3.3 1.2 .40 0 000 0 0 31 0 1.2 .40 0 0 0

TOTAL 13. 50 41.20 SB. 70 35.40 12.60 14.20 .20 2.00 .90 3.00 1.20 2.10 MEAN .44 1.37 1.B9 1.14 .43 .46 .0 07 .065 .030 .097 .039 .070 MAX .70 7.7 4.6 l.B .70 4.6 . 10 .40 .40 .60 .20 .40 MIN 0 0 .90 .40 0 0 0000 0 0 AC-FT 27 82 116 70 25 2B .4 4.0 1.8 6.0 2.4 4.2 SAN JUAN CREEK BASIN

11047000 ARROYO TRABUCO NEAR SAN JUAN CAPISTRANO, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY OCT NOV DEC JUN JUL

1 .10 0 0 0 65 275 33 16 .3 2 20 0 0 0 57 215 33 14 .1 .40 3 20 .10 0 0 49 178 44 16 .3 3.6 .70 4 0 .10 0 0 49 148 36 15 .6 4.0 2.0 5 0 0 0 0 62 125 41 16 .3 4.5 1.3 6 0 0 0 0 .5 .30 7 0 0 0 0 330 103 40 18 .8 8 0 0 0 0 232 94 35 16 .6 9 0 0 .20 0 142 88 34 16 .7 1.3 10 0 .40 .10 0 110 85 32 16 .6 1.7 11 C 0 .20 0 86 82 31 15 .0 12 0 0 .10 0 72 80 30 15 .1 13 0 0 G 0 57 80 27 14 .6 2.0 14 0 0 .20 .30 44 80 27 14 .6 .70 15 0 0 0 0 44 78 24 14 .3 2.3 16 .10 0 0 0 44 75 26 12 .6 1.1 2.4 17 0 0 0 0 39 68 22 9.2 .3 .50 2.0 18 0 0 0 0 72 58 20 8.0 .5 .70 2.6 19 0 0 0 2.1 90 55 19 8.3 .6 20 0 0 0 3.8 83 60 17 8.9 .2 21 0 0 0 69 66 80 17 9.6 .9 22 10 0 0 34 175 67 18 11 .1 23 20 0 0 7.1 460 58 17 11 .9 6.4 24 20 0 0 87 3,360 58 18 11 .8 6.0 25 .20 0 .10 1, 650 2,960 55 21 10 .8 5.1 26 .20 0 0 1, 100 1,560 50 20 9.8 .6 .70 4.5 27 20 0 0 420 564 49 20 9. .0 .70 4.8 26 20 0 0 237 378 50 20 9. .1 .70 3.6 29 .10 0 0 133 40 18 8. .3 4.3 30 0 u 0 100 35 18 8. .9 5.3 31 0 0 80 _8. .3 TOTAL 2.00 .60 .90 3, 923.30 11,764 2,716 805 387. 17 15 .3 MEAN .0 i5 .020 .029 127 420 87.6 26.8 12. 5 r 4 98 MAX 20 .40 .20 1,650 3,360 275 47 1 .6 KIN 0 C 0 0 39 35 17 8. .9 AC-FT 4 .0 1.2 1.8 7,780 23,330 5,390 1,600 768 340 306

DISCHARGEi IN CUBIC FEET PER SECOND , WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

*IUI.

1 5. .60 .20 2.2 .10 2.1 .6 2.5 .10 2 5. .40 .30 .2.2 .30 10 .6 .50 0 3 2. .30 .80 2.9 3.3 10 .6 .20 0 4 2. .10 .50 1.3 2.4 8.0 .6 .30 o 5 2. .10 .30 1.8 .50 18 .1 1.3 0 6 2. 1.6 .70 3.5 .30 12 .4 .70 0 7 3. 2.7 .50 4.5 .10 7.8 .2 .60 0 8 3. 1.1 .50 4.8 0 6.XI .7 1.2 0 9 3. .90 1.7 4.8 0 4.8 .0 .SO 0 10 3. 1.1 2.2 2.3 1.8 S.7 .1 0 .10 11 4. .70 3.6 .40 2.0 6.2 .8 0 0 12 3. .60 3.3 .50 .50 6.4 .8 .so .60 0 14 3. .30 1.1 1.4 .90 4.2 .0 .70 0 .10 .10 15 2. .20 1.3 2.4 .40 3.6 .1 .40 0 .20

16 1.2 .10 2.9 1.3 .50 3.5 .6 0 17 .70 .20 3.5 .SO .10 16 .50 .20 5.6 .40 .2 4.8 .0 0 0 19 .60 .30 7.3 .40 20 .50 .40 5.8 1.5 .7 5.0 .40 .30 0 21 .30 .50 2.0 2.7 .2 4.2 .7 .20 0 .20 22 10 .70 1.9 3.8 .5 3.9 .1 .20 0 23 )0 .50 3.3 3.5 .90 4.0 .0 0 0 24 0 .30 3.0 2.2 .4 4.9 .1 0 0 25 .20 .30 .90 1.2 .1 4.3 .1 0 0 26 .30 .40 .70 1.3 .1 3.6 .80 0 0 27 .30 .30 .10 o 26 .30 .20 2.0 2.9 .1 3.7 .7 .10 0 29 .1.0 .20 .90 2.6 ______2.6 .5 .20 o 30 .! 0 .20 3.1 3.6 ______2.7 .6 0 0 31 .60 4.3 1.0 5.2 0 TOTAL 58.50 15.90 68.00 67.30 35.90 176.9 91.90 11.10 .30 .30 2.90 MEAN 1.89 .53 2.19 2.17 1.28 5.71 3.06 .36 .010 .010 .097 .10 .20 1.4 MIN .20 .10 .20 .40 0 2.1 .40 0 0 0 22 . .6 .6 CAL YR 1969 TOTAL 20,193.60 MEAN 55.3 MAX 3,360 MIN 0 AC-FT 40,050 1,050 SAN JUAN CREEK BASIN

11047200 OSO CREEK AT CROWN VALLEY PARKWAY, NEAR MISSION VIEJO, CALIF. LOCATION.--Lat 33°33'29", long 117°40'33' in SB's sec.14, T.7 S., R.8 W., Orange County, on right upstream side of Crown Valley Parkway bridge, 2.7 mi ! south of Mission Viejo and 4.0 miles north of San Juan Capistrano. DRAINAGE AREA.--14.0 sq mi. PERIOD OF RECORD.--December 1969 to September.1970. GAGE.--Water-stage recorder. Altitude of gage is 250 ft (from topographic map). EXTREMES.--Maximum discharge during period, 251 cfs Mar. 1 (gage height, 3.72 ft); no flow for many days. Period of record: Maximum discharge, 251 cfs Mar. 1. 1970 '(gage height, 3.72 ft); no flow for many days. REMARKS.--No regulation or diversion above station. COOPERATION.--Records furnished by Orange County Flood Control District and reviewed by Geological Survey. DISCHARGE, IN CUBIC FEET PER SECOND, DECEMBER 1969 TO SEPTEMBER 1970

DAY OCT NCV HAY JUN JUL

.10 0 .20 33 .40 .30 0 .10 0 .20 24 .40 .20 0 .10 0 .50 7.1 .40 .30 0 .10 0 .60 28 .40 .20 0 .10 1.3 .30 15 .20 .20 0 .10 0 .30 .60 .20 .30 0 .10 0 .30 .60 .10 .40 0 .10 1.8 0 .50 .60 .10 .60 0 .20 3. .60 1.0 .10 .60 .20 .10 7. 27 3.1 .20 .60 .20 .10 14 .2 1.5 .20 .60 .20 3. .9 1.1 .20 .50 .10 . 0 .2 .80 .30 .50 .20 1. .9 .SO .30 .30 .10 1. .9 .SO .30 .20 .10 .8 0 16 .9 .70 .30 .10 .20 .10 .10 .5 .BO .40 .20 .20 .10 0 .3 .80 .40 .10 .10 .20 .3 .60 .30 .40 .10 .20 .3 .50 .30 .20

.30 .30 .3 .60 .30 .20 .40 .50 .3 .70 .20 .30 .30 .40 .3 .50 .20 .20 .30 .40 .5 .60 .20 0 .40 .30 .3 .60 .20 .10

.60 .30 .5 .60 .40 .20 .50 .20 .5 .40 .70 .30 .40 .30 17 .40 .60 .30 .10 .20 .40 .40 .20 0 .20 .40 .40 .10 31 .10 .20 .80 0

TOTAL 6.60 53.40 75.60 127.40 9.10 8.70 1.50 7.00 MEAN .21 1.72 2.70 4.11 .30 .28 .050 .23 MAX 1.8 16 27 33 .70 .60 .20 6.8 MIN 0 0 .20 .40 .10 000 AC-FT ALISO CREEK BASIN

11047500 ALISO CREEK AT EL TORO, CALIF. LOCATION.--Lat 33 0 37'34", long 117°41'03", in Canada de los Alisos Grant, Orange County, near center of cha

DRAINAGE AREA.--7.91 sq in (revised). PERIOD OF RECORD.--Octobe 1930 to September 1970. GAGE.--Water-stage recorder. Altitud f gage is 440 ft (fr topographic map). Prior to July 1962, at differ- ent datum. AVERAGE DISCHARGE.--40 years, 0.76 cfs (551 acre-ft )er year); median of yearly mean discharges, 0.2 cfs (140 acre-ft per year-). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water years 1966-70 are contained in the following table: Minimum Wtr yr Date Discharge G.H. Date D 1966 Dec. 29 1965 277 4.51 Many days 0 1967 Dec. 6 1966 333 2.91 1968 Mar. 8 1968 75 1.68 1969 Feb. 24 1969 2,500 all.00 1970 Mar. 4 1970 95 2.09 From floodmark. charge, 2,500 cfs Feb. 24, 1969 (gage height, 11.00 ft, from floodmark), from rating curve e fs on basis of slope-area measurement of peak flow; no flow for most of time in each year. REMARKS.--No gage-height record Feb. 13 to Mar. 24, 1969. No regulation or di ersion above stati from wells along stream. At times since 1964, Metropolitan Water District aste water has bee creek. COOPERATION.--Records furnished by Orange County Flood Control District. REVISIONS (WATER YEARS).--WSP 961: 1941(M).

DISCHARGE. IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DA* OCT NOV DEC JAN FEB MAR APR MAV JUN JUL 1 .10 0 .40 .20 () 2 0 .10 .40 .10 .50 3 .20 .10 .20 .10 .2 4 .10 .20 .10 .0 5 .10 .20 .10 .20 .0 b .20 .20 .10 .BO r .20 .10 .10 .10 8 .20 .10 0 9 .70 .10 .10 10 1.3 .20 1.6 .10 11 1. .10 .10 .10 1? 2. .10 .10 .10 13 2. 0 .30 0 14 2. .10 3.7 .10 15 2. .20 2.4 .10 16 1. 1.4 6.5 .10 17 . 0 .40 .20 .10 19 .30 .40 .10 .10 19 .20 .10 .10 .10 20 0 .10 .20 .10 21 0 .10 .20 .10 .10 22 0 51 .30 .10 .10 23 .60 20 .20 .10 .10 24 1.2 15 .30 .10 25 .90 2.1 .40 } .10 26 .20 .90 .30 ) 27 .10 .70 .30 ) 2<8 .20 .80 .30 ) .10 29 .10 .60 38 __.»_* .10 30 .10 .50 3.8 .10 .10 31 .10 _____ .30 o TOTAL 20.60 95.00 61.60 2.30 L.SO .10 .30 1.70 MEAN .66 3.17 1.99 .074 054 003 010 .12 MAK 2.8 51 38 .20 .80 .10 .10 1.2 MIN 0 0 .10 0 0 0 0 0 AC-FT 41 188 122 4.6 3.0 .2 .6 7.3

MEAN .70 MEAN .51 ALISO CREEK BASIN

11047500 ALISO CREEK AT EL TORO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO !

.40 .10 .10

1.9 .80

16 0 0 0 0 0 0 0 0 .20 .10 17 0 0 0 0 0 0 0 0 .20 .10 IB 0 0 0 0 0 0 0 .20 .20 0 19 0 0 0 .60 0 0 .20 .20 .10 0 20 0 0 c 0 0 c .20 0 .10 0 21 0 0 0 0 0 0 .10 .20 .10 0 22 0 0 0 3.2 0 0 .10 .10 .20 0 23 .10 0 0 2.1 0 0 .10 0 0 0 24 .10 0 0 47 0 0 .20 0 0 .10 25 .10 0 c 1.1 0 0 0 0 0 0 26 0 0 0 .40 0 o 0 .20 0 0 27 c 0 c .30 0 0 0 .10 0 0 28 0 0 0 .30 0 0 0 .20 0 0 29 c 0 0 .20 . 0 0 .10 0 0 30 0 0 0 .20 0 .10 0 0 0 31 0 0 .20 0 . 10 0 TOTAL 2.00 .90 224.40 55.60 .10 .20 1.00 1.40 2.00 .40 MEAN .065 .030 7.24 1.79 .004 .007 .033 .045 .067 .013 MAX .80 .50 112 47 .10 .10 .20 .20 .30 .10 HIN 0 0 0 0 0 0 0 0 0 0 AC-FT 4.0 1.8 445 110 .2 .4 2.0 2.8 4.0 .8

ER 196 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL 1 0 .10 .40 .30 .30 0 0 0 0 0 2 0 .10 0 .50 .20 0 .40 .40 1.1 0 3 .10 .10 0 .50 .20 0 0 .60 0 0 4 0 0 .50 .10 .90 0 0 .80 0 0 S 0 .10 .30 .10 .30 0 0 0 0 0 6 0 0 0 .10 0 .10 0 0 0 7 0 0 0 .20 0 .10 0 0 0 8 0 0 0 .40 .10 5.3 0 0 0 9 .1C 0 .20 .10 .10 0 0 0 0 1C .10 0 0 .10 0 0 o 0 0 11 0 0 .10 .10 .10 0 0 0 0 12 0 0 C .10 0 0 o 0 0 13 0 0 0 .10 .10 .40 0 .10 0 0 14 .10 0 0 .20 0 .20 0 .70 0 0 15 0 0 0 .20 .10 .30 0 c 0 16 0 0 0 .10 0 .30 0 0 0 17 .10 2.1 .20 .10 0 .30 0 0 0 18 0 .20 2.6 .20 0 .20 0 0 0 19 .20 7.6 1.0 .20 0 .30 0 0 0 20 .10 12 0 .20 .10 .30 0 0 0 21 .10 19 .10 .20 0 .10 0 0 .70 22 .10 1.4 .10 .20 .30 .20 0 0 .40 23 0 .30 .20 .20 0 .20 .20 0 0 24 0 .80 .20 .20 0 .20 Q 0 0 25 0 .80 .10 .10 0 .20 .10 0 0 26 .20 .80 .10 .10 0 .10 .70 0 0 27 .10 .80 .30 .20 0 .1C .40 c 0 28 0 .10 1.6 .40 0 0 1.3 0 0 29 .20 .10 .90 .40 0 0 1.1 0 0 .20 30 0 1.0 .70 .40 0 0 0 0 .10 31 0 1.4 .20 0 .20 0 TOTAL 1.90 47.40 11.00 6.50 2.80 8.90 4.20 2.80 1.1 1.10 MEAN .048 1.58 .35 .21 .097 .29 .14 .090 .037 .036 MAX .20 19 2.6 .50 .90 5.3 1.3 .80 1.1 .70 MIN 0 0 C .10 0 0 0 0 0 0 AC-FT 3.0 94 22 13 5.6 18 8.3 5.6 2.2 2.2

WTR YR 1968 TOTAL 91.60 MEAN .25 MAX 19 MIN 0 AC-FT 182 ALISO CREEK BASIN

11047500 ALISO CREEK AT EL TORO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL 1 .10 .80 .30 0 1.0 8.0 .60 ' .70 2 .10 .60 .30 0 .80 1.5 .60 .70 3 .10 .90 .40 0 .70 . 60 .70 .70 4 .30 .90 0 .10 .60 ' .20 .70 .70 t .40 .70 .10 .10 .70 .20 12 .80 6 .40 .70 o o 126 .20 .20 .90 7 .50 .80 0 0 7.1 .20 .20 .90 8 .60 .70 .10 0 .80 .20 .20 .80 9 .50 .70 .20 0 .60 .20 .20 .80 .10 10 .40 .70 .20 0 .60 2.0 .20 .80 .20 11 .40 .70 o o .60 .60 .20 .80 .30 12 .30 .60 o o .60 1.0 .20 .80 .40 13 .20 .60 0 0 .60 1.0 .10 .80 .30 U .20 .70 C 0 .50 1.0 .10 .80 .30 15 .30 .70 0 0 .30 .50 .10 .80 .30 16 .60 .70 0 0 .60 .50 .10 .70 .20 IT .0 .60 0 0 .60 .50 .10 .70 .20 IB .5 .60 o o 30 .50 .10 .70 0 19 .5 .60 0 0 9.0 .50 0 .70 0 20 .5 .60 C 6.6 2.0 .50 .10 .60 0 21 .5 .30 0 46 8.0 10 .10 .60 0 22 .4 .10 0 5.1 10 2.0 .10 .50 0 23 .2 .10 0 0 370 .50 .10 .20 0 24 .90 .10 0 76 500 .50 .20 0 25 .80 .10 .10 331 220 .60 .20 0 26 .60 0 .20 61 150 .50 .20 0 27 .90 0 .10 12 50 .50 .20 0 26 .90 .10 .20 7.5 IS .50 .50 0 29 .80 .40 .10 2.8 .50 .50 0 30 .60 .30 .10 1.6 .50 .60 0 31 .60 - 0 1.3 .50 DIAL 21.70 15.60 2.40 551.10 1,506.70 36.50 19.40 16 .50 2 .30 0 E-AN .70 .52 .077 17.8 53.8 1.16 .65 .53 . 077 0 AX 1.5 .90 .40 331 500 10 12 .90 .40 0 IN .10 0 0 0 .30 .20 0 0 0 0 38 33 4.6 0 AL YR 196S TOTAL 71.40 MEAN .20 MAX 5.3 MIN 0 AC-FT 142 TR YR 1969 TOTAL 2,172.20 MEAN 5.95 WAX 500 MIN 0 AC-FT 4,310

DISCHARGE , IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO S EPTEMBER 1970 CAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL 1 0 0 4.4 2 0 1.5 3 0 .10. 4 0 10 5 0 1.5 6 0 .60 7 .60 .50 8 .10 .20 9 0 .20 10 0 .40 0 11 0 .20 .50 12 0 .50 13 0 .20 14 0 0 15 0 .40 .50 16 0 .20 IT 0 0 18 0 .10 19 0 0 20 0 0 21 0 0 22 0 0 23 0 0

3W V u 0 TOTAL .70 .40 2.00 21.00 0 MEAN .023 .013 .071 .68 0 MAX .60 .40 1.3 10 0 MIN 0 0 0 0 0 AC-FT 1.4 .8 4.0 42 0 CAL YR 1969 TOTAL 2,133. 2P MEAN 5.84 MAX 500 MIN 0 AC-FT 4,230 MIN 0 AC-FT 48 PETERS CANYON WASH BASIN

11048500 SAN DIEGO CREEK NEAR IRVINE, CALIF. LOCATION.--Lat 33°40'20", long 117°47'10", in San Jo from Jeffrey Road bridge and 1.5 miles'west of Ir DRAINAGE AREA.--40. 3 sq mi. PERIOD OF RECORD.--October 1949 to September 1970.

AVERAGE DISCHARGE.--21 years, 3.06 cfs (2,220 re-ft per year); median of yearly mea charges, 1.4 cfs (1,000 acre-ft per year).

EXTREMES.--Maximums and minimums (discharge in cubic feet p second, gage height in feet), Annual maximum discharge (*) and peak discharges bove base (100 cfs), water yeai

Date Time1 Disch. G.H. Date Time Disch. G.H. Date Time Disch. G. H. 16, 1965 1930 386 3.09 Dec. 3, 1966 1015 932 4.10 Jan. 21, 1969 0815 746 4. 12 22, 1965 2115 1,440 4.88 Dec. 5, 1966 0815 1,410 4.84 Jan. 25, 1969 1245 4,650 9. 20 10, 1965 0745 398 3.12 Jan. 24, 1967 2045 *1,620 5.10 Feb. 6, 1969 1130 250 2. 65 14, 1965 1330 398 3.12 Feb. 24, 1969 0145 6,700 11. 46 1965 1115 201 2.57 Nov. 21, 1967 1330 1,880 5.42 Mar. 21, 1969 1545 126 2. 30 29, 1965 1900 2,550 6.15 Dec. 18, 1967 1400 1,190 4.53 Apr. 5, 1969 1915 105 2-. 20 Feb. 6, 1966 1115 163 2.44 Mar. 8, 1968 0745 840 3.97 Nov. 6, 1969 1530 254 2. 74 7, 1966 1515 1,340 4.72 Dec. 25, 1968 1615 398 Feb. 10, 1970 2130 103 2. 19 Mar. 4, 1970 2315 1,060 4. 34

Period of record: Maximum discharge, 6,700 cfs Feb. 24, 1969 (gag >ht, 11.46 ft), from rating curve extended above 510 cfs on basis of slope-area measurements at gage heights 9.20 and 11.46 ft; i10 flow fo r most of time in each year. along stream caus

COOPERATION.--Forty-nine discharge measurements furnished by Or inge County Flood Control District. IBER 1966 JUN

1 .40 1.0 1.5 22 .50 .30 0 .40 -.10 .20 2 .60 .60 1.5 15 .40 .40 0 .30 .30 .60 3 .50 .30 1.6 9.8 0 .50 0 .20 .20 .50 4 .70 .60 liT 6.0 0 .30 0 .20 .40 .50 5 .70 .80 .80 2.0 0 .10 0 .20 .60 6 .80 .80 .10 0 49 0 0 .40 .50 7 .80 .60 0 0 7.1 0 0 .50 .10 8 .60 .30 0 0 .10 .10 0 .50 .30- 9 .40 .60 .10 0 .20 .40 0 .50 .60 10 .50 1.0 83 0 1.6 0 0 .70 .40 11 .60 1.0 2.1 0 1.9 .10 0 .60 .70 12 .50 .90 5.4 0 .10 .30 0 .60 .60 13 .30 .70 13 0 .20 .20 0 .50 .40 14 .40 1.9 76 . 0 .70 .30 0 .70 .50 15 .60 13 8.6 0 1.1 0 0 .70 .40 16 .60 58 87 0 1.1 0 .10 .30 .50 17 .60 21 9.9 0 0 0 .50 .30 .50 18 .60 2.7 3.9 0 0 0 .40 .40 .60 19 .70 .30 1.5 0 .40 0 .70 .60 .90 20 .50 .10 .60 0 .60 0 .90 .90 .80

.60 .60 .70 .20 1.1 .50 .10 .20 .80 uo .10 .20 .60 D .30 .20

0 .90 .20 0 .10 .10 .50 .60 401 a .50 1.2 106 .80 1.0 . 10 . 10

1.50 MEAN .12 .050 MAX .50 WIN AC-FT PETERS CANYON WASH BASIN

11048500 SAN DIEGO CREEK NEAR IRVINE, CALIF.--CONTINUED DISCHARGE. IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

OAT OCT NOV DEC JAN FEB KAR APR MAY JUN JUL AUG SEP 1 .20 1.3 .80 0 .30 1.0 3.8 .28 .26 .93 .26 1.4 2 1.0 .80 1.0 .20 .20 .78 .37 .21 .45 .88 .42 .21 3 1.0 1.2 225 .50 .20 .71 .01 .24 .03 .87 .29 .05 4 .70 1.3 3.9 .50 .10 1.3 .03 .17 .10 1.0 .23 .01 5 .40 1.4 572 .50 .ID .16 .09 .30 1.4 .92 .41 0

6 .60 1.6 244 .40 0 .66 .02 .12 1.4 .82 .36 .50 7 .70 185 105 0 0 .50 .08 .01 .73 1.2 .20 .15 8 .70 2.9 34 0 .10 .66 .06 .02 .35 1.0 .15 .08 9 .90 .10 20 .30 .20 .74 .12 0 .58 .74 .15 .02 10 .90 0 15 .80 0 .59 .21 0 .20 .75 .15 0 11 .80 D 12 .70 0 2.6 11 0 .19 .94 .15 .03 12 .90 .50 9.7 .70 0 .70 .04 .02 .49 .82 .15 .01 13 .40 1.3 5.4 .10 0 5.4 .13 .02 .39 1.0 .15 .14 14 0 1.4 2.4 0 0 4.9 .42 .02 .35 1.2 .15 .31 15 .50 1.4 2.5 0 0 .02 .15 .03 .36 .89 .15 .51 16 .90 1.6 1.0 .10 0 .11 .14 .02 .60 .89 .15 .20 17 .80 1.5 3.1 .30 0 .06 .31 0 1.2 .94 .15 .23 18 .70 1.5 .90 .60 0 .05 8.1 0 .92 .94 .15 .24 19 1.0 1.4 1.0 .30 0 .09 12 0 .99 1.0 .15 .09 20 .80 1.2 2.4 .20 0 .21 2.3 0 1.1 .86 .15 .16 21 .80 1.3 3.1 .20 .10 .04 3.5 .13 1.0 .89 .15 .34 22 1.7 1.3 1.4 49 0 .03 7.8 .22 .90 .81 .15 .26 23 1.2 1.7 1.2 45 .10 .15 .41 24 1.2 1.8 .30 314 .20 .02 2.9 .42 .75 .35 .15 .33 25 1.5 2.3 .10 91 .40 .03 .52 .08 1.1 .23 .15 .13

26 1.5 2.6 .10 8.0 .20 .03 .23 .38 .95 .18 .15 .34 27 1.5 3.2 .20 2.4 .50 .16 .21 .31 1.3 .11 .15 .47 28 1.4 3.5 .20 1.0 .10 .07 .20 .20 3.0 .08 .17 3.4 29 1.5 3.4 .10 .60 ~ .25 .17 .40 1.7 .07 .34 .20 30 1.5 2.6 .30 .50 .48 .12 .18 1.1 .07 .26 .04 31 1.4 .40 .40 7.8 .40 .34

HE AN .94 7.70 40.9 16.7 .10 .98 1.84 .14 .82 .72 .20 .34 MAX 1.7 185 572 314 .50 7.8 12 HIN 0 0 .10 0 0 .02 .01 0 .03 .07 .15 0 AC-F7 58 458 12 20

IBER 1968

OAY OCT NOV DEC JAN FEB MAR APR HAY JUN JUL AUG SEP 1 .04 .52 .15 .12 .10 .11 3.6 .43 1.6 1.3 .25 2 .12 .52 .07 .30 .54 .34 5.6 .IB 1.4 1.2 .94 3 .14 .44 .06 .90 .85 .38 .81 1.0 1.1 1.8 . 6 .2 4 .07 .03 1.2 .84 1.7 .3 5 0 .30 .08 .90 .61 1.4 .02 1.1 .62 1.6 .4 6 .10 .15 .11 .76 .64 .70 .01 1.0 .52 1.5 .7 7 .05 .44 .10 .11 .83 4.5 0 1.5 .52 1.4 .7 8 .02 .44 .15 .56 1.1 103 .08 1.5 .52 1.4 .5 9 .02 .15 .14 .65 .64 16 .05 1.5 .52 1.3 .5 10 .12 .30 .14 .96 .44 7.6 0 1.4 .35 1.2 .7

11 .15 .07 .17 .50 .45 2.8 0 1.2 .88 1.1 .8 12 .13 .19 .56 .48 .62 .44 .80 2.0 1.1 1.1 .7 13 .23 .02 .68 .30 .89 1.2 .92 1.6 1.1 1.0 .84 14 .12 .15 1.5 .20 2.4 .40 .72 .96 1.2 .94 .67 15 .47 .72 1.0 .40 .74 .59 1.1 .84 1.3 .90 .76 16 .38 .78 17 .05 .10 .50 .30 .38 .51 .44 1.4 1.7 .78 .87 IB .96 .10 113 .30 .46 .54 .28 .84 1.7 .73 1.1 19 .88 25 30 .30 .73 .55 .97 .44 1.1 .80 . .82 20 .97 15 1.5 .20 .80 .39 .39 .72 2.4 .86 .68 21 .27 125 .54 .20 .87 .48 .63 1.2 2.1 .57 .0 22 .66 2.1 .42 .20 .37 .66 1.5 1.2 2.0 .40 .0 23 .49 .11 .25 .20 .48 .60 1.5 .96 2.5 .69 .3 24 .71 .10 .20 .20 .27 1.7 1.9 1.6 2.2 .40 . .4 25 .77 .20 .15 .20 .12 1.6 2.5 1.2 2.4 .90 .30 .1 26 .10 .07 .31 .20 .55 .60 2.2 1.6 3.2 .87 .39 1.3 27 .44 .13 .31 .10 .09 .67 1.7 1.4 3.2 1.1 .41 .73 28 .06 .21 .34 . .10 .02 .54 1.6 1.8 2.1 1.2 .51 1.1 29 .02 .18 .16 .10 .11 .57 1.5 1.8 1.8 1.2 .71 .61 30 .15 6.7 .08 .10 .49 .83 2.0 1.3 1.2 .40 .68 31 .24 .11 .10 .36 , 1.8 _ 1.7 .17

MEAN .28 5.99 4.95 .35 .59 4.85 1.07 1.22 1.48 1.09 1.71 1.11 MAX .97 125 113 .90 2.4 103 5.6 2.0 3.2 1.8 4.0 1.8 HIN 0 .02 .06 .10 .02 .11 0 .18 .35 .40 .17 .25 AC-FT 17 357 304 21 34 299 64 75 88 67 105 66 HIN 0 AC-Ff 2.020 HTR YR 196B TOTAL 754 .94 MEAN 2.06 MX 125 HIN 0 AC-FT 1.500 PETERS CANYON WASH BASIN

11048500 SAN DIEGO CREEK NEAR IRVINE, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

NOV DEC JAN FEB MAR APR MAY JUN JUL

I 16 0 .06 .55 1.1 .57 .82 2 .82 1.6 2.0 1.5 2.B 9.5 0 .01 .96 1.2 .72 .B8 3 1.1 1.3 2.0 .87 2.5 4.0 3.6 .01 1.2 .75 .69 1.5 4 1.5 1.5 2.0 .60 2.2 1.4 .23 .01 1.6 .46 .79 1.2 5 1.9 1.9 2.1 .69 2.0 1.3 7.8 .07 1.3 .30 1.2 ' .87 6 1.2 1.7 2.1 .98 200 .06 7.5 .16 1.3 .62 1.1 .66 7 1.4 2.7 1.6 1.1 21 .01 2.2 '.09.04 1.2 .69 1.0 .47 8 1.4 2.2 1.6 .99 3.5 0 .03 1.5 .74 1.2 .65 9 1.6 3.2 1.1 1.2 .92 10 2^0 1.3 2.8 .41 1.4 14 .14 .02 1.3 1.6 1.3 1.0 11 2.2 1.1 2.4 .12 1.1 4.5 .04 .02 1.5 2.3 1.1 .83 12 2.1 1.6 2.0 .22 1.2 .35 .07 .01 .64 2.0 1.4 .62 13 1.7 1.9 1.6 3.1 .79 .02 .03 .03 .19 1.7 1.4 .70 14 .80 2.2 1.1 12 .56 0 .09 .05 .63 1.5 1.2 1.1 15 2.2 3.4 1.6 .96 .71 0 .07 .06 .80 1.4 1.7 .85 16 2.3 1.6 2.1 .36 .67 0 .06 .06 .59 1.3 .75 .64 IT 2.9 1.1 1.3 .48 .29 0 .07 .07 .97 1.5 .79 .49 IB 2.1 1.6 1.5 7.6 13 0 .05 .04 1.0 1.5 .93 .34 19 1.9 2.4 2.1 15 23 .03 0 .05 1.4 1.5 1.2 .31 20 1.5 2.5 2.6 64 4.4 .05 0 .08 2.4 1.4 1.1 .38 21 1.3 1.8 2.0 113 1.3 41 0 .19 2.3 1.7 1.1 .36 22 1.9 1.9 2.1 23 208 19 .04 .15 1.6 1.6 1.3 .58 23 1.3 1.7 2.6 11 959 .08 .11 .22 1.6 1.6 1.3 .44 24 1.6 1.3 1.8 215 2,170 0 .24 .23 1.7 2.0 1.3 .56 25 2.1 1.6 22 1.470 1,540 .13 .14 .19 1.8 1.3 1.4 .41 26 2.1 1.9 8.2 166 202 .21 .15 .29 2.9 .82 1.1 .45 2T 1.3 1.7 1.4 38 35 0 .09 .36 2.7 .34 1.5 .25 2B 1.9 1.5 1.0 20 33 0 .09 .32 2.4 .08 1.2 .16 29 2.6 1.5 .90 6.0 0 .03 .29 2.4 .11 .78 .20 30 4.0 1.4 1.7 5.0 0 .04 .48 1.7 .41 .93 .22 31 3.3 1.2 4.0 0 .58 .45 1.5

MEAN 1.83 1.80 2.70 70.5 194 3.60 .77 .14 1.47 1.14 1.12 .63 MAX 4.0 3.4 22 1,470 2,170 41 7.8 .58 2.9 2.3 1.7 1.5 MIN .46 1.1 .90 .12 .29 0 0 .01 .19 .08 .57 .18 221 46 6.5 88 70 69 37

MAX 103 HIM 0 AC-FT 1,210

DISCHARGE , IN CUBIC FEET PER SECOND , HATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 DAY OCT NOV DEC JAN FEB MAR APR HAY JUN JUL AUG SEP 1 .37 1.6 .94 .82 .11 29 .01 .40 1.7 1.1 .56 .43 2 .72 1.8 .81 1.1 .45 64 .02 .35 2.3 .81 .70 .48 3 1.3 .90 .56 1.1 .56 1.3 0 .35 2.2 1.2 .69 .35 4 1.0 1.3 .53 1.2 .32 78 0 .35 1.2 1.0 .59 .46 5 1.1 1.4 .87 1.4 .33 75 0 .11 .46 1.1 .99 .43

6 1.1 26 .54 1.3 .13 1.0 .01 .30 .62 1.3 .98 .32 7 1.5 39 .52 1.7 .08 0 .01 .41 .51 .9 .81 .49 a 1.5 .57 1.0 2.1 .08 0 0 .43 .54 .1 .69 .28 9 1.2 .52 .B4 4.3 .21 0 0 .62 .93 .7 .75 .33 10 .83 .54 .92 3.0 15 0 .01 .46 .67 .9 .68 .22 11 1.4 .46 1.1 4.5 9.2 0 0 .49 .50 .8 .75 .32 12 1.2 .44 .99 1.4 1.3 0 0 .63 1.0 .6 .66 .10 13 2.1 .44 1.1 .70 1.0 0 0 .68 1.1 .4 .75 .09 14 2.0 .44 .63 .86 .91 0 0 .74 .73 .1 .70 .08 15 1.6 .44 .83 .66 .72 0 0 .89 .66 1.3 .26 .03 16 1.- .44 .76 B.4 .51 0 0 .67 .81 1.4 .31 .22 IT 1.7 .40 .87 2.1 .33 0 0 .96 1.1 1.2 .34 .21 18 .91 .36 1.0 .04 .24 0 0 1.3 .75 1.0 .40 .14 19 .94 .47 1.2 .01 .13 0 0 1.4 .51 .79 .49 .13 20 1.2 .79 1.3 0 .05 0 0 1.6 .60 .54 .63 .14 21 1.2 .59 .96 .59 .03 0 .01 1.2 .74 .58 .51 .17 22 1.7 .66 1.2 .45 .02 .05 .02 .66 .69 .83 .47 .12 23 1.4 .52 1.3 .44 .01 .13 .03 1.3 .68 .88 .53 .12 24 1.5 .51 1.1 .37 .01 .03 .04 1.2 .93 .50 .42 .21 25 1.2 .67 .72 .19 .30 .07 .05 1.3 .94 .36 .40 .29 26 1.0 1.5 .72 .34 .75 .20 .06 1.7 .66 .66 .36 .39 27 .97 .94 .72 .26 .71 03 .07 2.2 .88 .73 .55 .36 28 .B4 .77 .72 .23 19 .04 .08 2.3 1.2 .95 .51 .39 29 1.0 1.2 1.3 .37 _ . .01 .09 2.2 1.3 1.3 .47 .45 30 1.4 1.2 2.3 .34 ______.69 .45 2.3 1.2 1.3 .37 .41 31 1.2 1.6 .41 .86 2.1 .56 .24 TOTAL 38.48 86.87 .96 32.00 28.13 34.09 17.58 8.16 MEAN 1.24 2.90 .97 1.31 1.B7 a. os .032 1.03 .94 1.10 .57 .27 MAX 2.1 39 2.3 8.4 19 78 .45 2.3 2.3 1.9 .99 .49 KIN .37 .36 .52 0 .01 0 0 .11 .46 .36 .24 .03 AC -FT 76 172 59 81 104 497 1.9 63 56 68 35 16

HTR YR 1970 TOTAL 619.80 MEAN 1.70 MAX 78 MIN 0 AC-FT 1,230 EXPLANATION Q4280 oalno. ttotlon Mmiittrt tn Hm» firm in

Figure2. Schematic diagram thawing diversions and storage in Sonlo Ana River baiin. 130 SANTA ANA RIVER BASIN

11049000 BIG BEAR LAKE NEAR BIG BEAR LAKE, CALIF. LOCATION (REVISED).--Lat 34°14'33", long 116°S8'33", in SWu sec.22, T.2 N., R.I W., San Bernardino County, at Bear Lake Dam on Bear Creek, 4 miles west of town of Big Bear Lake and 7.5 miles upstream from mouth. DRAINAGE AREA.--71.5 sq mi. PERIOD OF RECORD.--October 1950 to September 1970 in reports of Geological Survey. February 1884 to Septembe

GAGE.--Nonrecording gage. Datum of gage is 6,670.9 ft above mean sea level (levels by Bear Valley Mutual Water Co.). Prior to 1912, at old dam 200 ft upstream at present datum (spillway at gage height 52.4 ft). EXTREMES.--Ma and minimum contents, in acre-feet, for the water years 1966-70 are contained in the following

Wtr yr Date Contents Date Contents 1966 Apr. 30, 1966 23,948 Oct. 31, 1965 6,020 1967 June 5, 1967 43,764 Nov. 5, 1966 19,324 1968 May 1, 1968 46,054 Nov. 18, 1967 40,476 1969 Apr. 30, May 31, 1969 72,200 Nov. 27, 1968 39,430 1970 Mar. 31 to Apr. 30, 1970 65,100 Sept.30, 1970 60,900 Period of record: Maximum contents nknown, lake spilled in 1916-17, 1922-23, 1938-39, 1969-70; lake dry October, November 18 8, August to Nove er 1899, October, November 1904. REMARKS.--Lake is formed by a multiple-arch concrete dam completed in 1912, replacing existing lower dam built in 1884; storage began in spring of 1884. Capacity, 72,200 acre-ft at elevation 6,743.2 ft (top of dam). Capac­ ity table based on survey made in 1883. No dead storage. Water used for irrigation only. See schematic dia­ gram of Santa Ana River basin .elsewhere in this report. COOPERATION.--Records ntents furnished by -Bear Valley Mutual Water Co. REVISIONS.--WSP 1928:

MONTHEND CONTENTS, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1970

MONTH CONTENTS CHANCE IN MONTH CONTENTS CHANGE IN (ACRE-FEET) CONTENTS (ACRE-FEET) CONTENTS (ACRE-FEET) (ACRE-FEET) OCTOBER 1965...... -382 OCTOBER 1968...... 39,600 -900 NOVEMBER...... , .... 14,135 +8,115 NOVEMBER.....:...... 39,600 0 +4,151 +200 ..... +15,50"5 CAL YR 1968.... -2,693 +20,200 +1,296 +3,000 MARCH...... +2,773 MARCH...... +3,100 +296 ..... 72,200 +6,100 MAY...... 23,504 -444 ..... 72,200 0 JUNE...... 22,470 -1,034 JUNE...... -300 -740 JULY...... 71,700 -200 -981 ..... 69,100 -2,600 . . . . . 19 , 842 -907. SEPTEMBER...... 65,100 -4,000 WTR YR 1966...... +13,440 ' WTR YR 1969.... *24,600 OCTOBER...... -387 OCTOBER...... -1,700 ..... 19,583 +128 NOVEMBER...... -100 ..... 32,453 +12,870 0 CAL YR 1966...... -+14,167 CAL YR 1969...... +23,500

.... 33,151 +698 ..... 63,400 +100 +1,047 FEBRUARY...... 0 . .... 36,290 +2,092 -MARCH...... +1,700 +3,838 0 +3,536 ..... 64,200 -900 JUNE...... 43,664 0 JUNE...... -1,000 -797 JULY...... 62,100 -1,100 -597 AUGUST...... 0 ..... 41,672 -598 ..... 60,900 -1,200

WTR YR 1967...... +21,830 ..... -4,200 OCTOBER...... -797 +399 +1,195

.... +10,016

..... 44,262 +1,295 +1,146 APRIL...... 46,054 +646 MAY...... -597 JUNE...... -1,195 .... 43,266 -996 AUGUST...... 42,270 -996 -1,794 SANTA ANA RIVER BASIN 131

11051500 SANTA ANA RIVER NEAR MENTONE, CALIF. LOCATION.--Lat 34°06'30", long m'OS'Sg", in NE3i;S«ft;Stft sec.4, T.I S., R. 2 W. , San Bernardino County, on right bank at diversion near mouth of canyon, 1.6 miles upstream from Mill Creek and 3.2 miles northeast of Mentone. Sept. 3, 1917, to May 27, 1969, at site 0.2 mile upstream. DRAINAGE AREA.--209 sq mi, including area tributary to Baldwin Lake at head of Bear Valley. PERIOD OF RECORD.--July 1896 to September 1970. Prior to October 1914, observed records not equivalent owing to Greenspot pipeline diversion between sites and exclusion of discharge from Warm Springs Canyon. Monthly dis­ charge only for January 1910, January, February 1916, published in WSP 1315-B. GAGE.--Water-stage recorder on river and water-stage recorder on powerhouse diversion. Altitude of gage is 1,950 ft (from topographic map). Prior to Sept. 2, 1917, nonrecording gages at several sites within 1.5 miles upstream at various daturas. Sept. 3, 1917, to May 27, 1969, water-stage recorder at site 0.2 mile upstream at different datum. AVERAGE DISCHARGE.--River only, 56 years (1914-70), 33.7 cfs (24,420 acre-ft per year); median of yearly mean dis­ charges, 9.7 cfs (7,000 acre-ft per year). Average combined river and canal, 74 years, 82.6 cfs (59,840 acre-ft per year); median of yearly mean discharges, 67 cfs (48,500 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (150 cfs), water years 1966-70

Riv >r only Comb Wtr yr Date Time Discharge G. H. Date Discharge 1966 Nov. 22, 1965 2300 *8,000 14. 4 Nov. 22 1965 *8,000 Dec. 10, 16, 29, 1965 _ _ _ Dec. 10 16, 29, 1965 1967 Dec. 3, 1966 1530 1,280 8. 75 Dec. 3 1966 1,280 Dec. 6, 1966 2100 *15,300 13. 25 Dec. 6 1966 *15,300 Jan. 24, 1967 2230 800 10. 55 Jan. 24 1967 800 Mar. 13, 1967 2300 ' 433 10. 15 Mar. 13 1967 433 Apr. 11, 1967 1000 288 10. 00 Apr..: 11 1967 288 Apr. 22, 1967 0400 370 10. 16 Apr. 22 1967 370 July 13, 1967 2100 181 9. 78 July 13 1967 181 Aug. 23, 1967 1900 252 9. 92 Aug. 23 1967 252 1968 Nov. 19, 1967 2200 218 9. 93 Nov. 19 1967 221 Nov. 30, 1967 1800 207 a9. 98 Nov. 30 1967 208 Mar. 8, 1968 1100 *288 10. 98 Mar. 8 1968 *288 1969 Jan. 14, 1969 1030 158 9. 87 Jan. 14 1969 158 Jan. 21, 1969 1130 2,410 11. 62 Jan. 21 1969 2,410 Jan. 25, 1969 1200 15,300 14. 68 Jan. 25 1969 *15,300 Feb. 6, 1969 - Feb. 6 1969 Feb. 25, 1969 10,000 12. 3 Feb. 25 1969 10,000 May 5, 1969 - - May 5 1969 1970 Nov. 7, 1969 0200 355 2. 75 Nov. 7 1969 357 Feb. 28, 1970 1900 *1,380 4. 13 Feb. 28 1970 "1,380 Mar. 21, 1970 1200 181 2. 52 Mar. 21 1970 185 From floodmarks. Annual minimum daily discharge, water years 1966-70 only Combined Wtr yr Date Discharge Date 1966 Many days Some days 1967 Oct. 1 to Dec. 2, 1966 Oct. 31 to Nov. 2, 1966 1968 Sept.29, 30, 1968 Aug. 31 to Sept. 4, 1968 1969 Many days Dec. 21, 1968, Jan. 9) 1969 1970 July 28 to Aug. 26, 1970 .10 Aug. 8-11, 1970 22 Period of record: Maximum discharge (river only), 52,300 cfs Mar. 2, 1938 (gage height, 14.3 ft, site and datum then in use), on basis of slope-area measurement of peak flow; no flow at times in some years. Maximum discharge (combined flow), 52,300 cfs (corrected) Mar. 2, 1938; minimum daily, 12 cfs Jan. 24-28, 1937, Jan. 4, 1949. Flood of Feb. 23, 1891, 53,700 cfs, from notes furnished by F. C. Finkle, consulting engineer, Los Angeles, Calif. REMARKS.--Records good except those for periods of no gage-height record, which are poor. Flow partly regulated by Big Bear Lake (see station 11049000). For records of combined discharge of Santa Ana .River and Southern California Edison Co.'s canal below powerplant No. 2, which diverts above station, see tables given herein. Bear Valley Mutual Water Co. pumped 438, 110, 617, 325, 1,486 acre-ft into canal below canal gage during the water years 1966-70, respectively. Prior to Oct. 1, 1952, pumped water entered canal above gage. See sche­ matic diagram of Santa Ana River basin elsewhere in this report. COOPERATION.--Thirty-five discharge measurements on Southern California Edison Co.'s canal below powerplant No. 2 furnished by that agency in connection with a Federal Power Commission project. REVISIONS (WATER YEARS).--WSP 931: 1940. WSP 1091: Drainage area. WSP 1635: 1918, 1920(M), 1922, 1937, 1943(M). WSP 1928: Drainage area. Revised figures of discharge, in cubic feet per second, for the water year 1910, superseding those published in WSP 447, are as follows: Date Obsenfed Comb inied Dischiarge Dischairge Nov. 21, 190 9...... 52 53 22..... 52 53 Obiserved C<)mbined Date Cfs-days Max. Min. Mean Runoff in Cfs- days Max. Min. Mean Runoff in acre-feet acre -feet November 1909.. 218.0 52 2.5 7.27 432 1 ,690 85 48 56.3 3,350 Cal yr 1909.. . 20,379.0 1,340 2.0 55.8 40,420 43 ,815 1,380 4437 ' 120 86,900 Wtr yr 1910.. . 23,715.5 8', 500 2 65.0 47,040 45 ,159 8,500 124 89,600 SANTA ANA RIVER BASIN

11051500 SANTA ANA RIVER NEAR MENTONE, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

NOV DEC JAN FEB MAR APR MAY JUN JUL 1 C 95 300 50 6.6 3.2 2.2 .80 .70 .30 .10 2 C 90 250 48 7.4 3.2 2.0 .80 .70 .30 .10 3 0 85 175 47 7.0 3.2 2.0 .80 .70 .30 .10 4 C 80 130 45 6.0 3.2 2.0 .80 .70 .20 .10 5 0 75 124 44 5.2 3.0 2.0 .90 .70 .20 .10 6 0 70 127 110 4.7 2.9 2.0 .90 .70 .20 .10 7 C 65 124 73 4.7 2.9 2.2 .90 .60 .20 .10 8 0 60 104 30 4.4 2.8 2.3 .90 .60 .20 .10 9 C 55 86 30 .10 10 0 100 79 26 4.2 2.8 2.3 .90 .60 .20 .10 11 0 95 79 30 4.2 2.8 2.3- .80 .60 .20 .10 12 0 90 83 22 4.0 2.8 2.2 .80 .60 .20 .10 13 0 85 83 20 4.0 2.8 2.0 .80 .60 .20 .10 14 0 80 88 22 4.0 2.6 2.0 .80 .60 .20 .10 15 0 75 86 22 4.0 2.4 2.0 .80 .60 .20 0 16 5.0 130 76 21 3.8 2.4 2.0 .80 .50 .20 0 17 20 100 74 20 3.6 2.6 2.0 .80 .50 .10 0 18 77 90 74 14 3.4 2.8 2.0 .80 .50 .10 0 19 19 80 72 12 3.6 3.0 1.8 .80 .50 .10 0 20 0 75 70 10 3.4 2.8 1.8 .80 .50 .10 0 21 C 70 63 10 3.4 2.8 1.7 .80 .50 .10 0 22 1.480 65 63 10 3.4 2.6 1.5 .80 .40 .10 0 23 2,900 60 62 9.6 3.6 2.4 1.1 .80 .40 .10 0 24 400 60 63 8.8 3.6 2.3 1.1 .80 .40 .10 0 25 450 55 56 8.0 4.0 2.3 .90 .80 .40 .10 0 26 250 55 56 7.7 3.6 2.3 .90 .80 .40 .10 0 27 200 50 50 7.4 3.4 2.3 .90 .80 .40 .10 0 28 150 50 40 6.9 3.2 2.3 .90 .80 .40 .10 0 29 125 1,500 30 _« w_ 3.0 2.3 .90 .80 .40 .10 0 30 100 1,000 50 ------2.9 2.3 .90 .80 .40 .10 0 31 500 60 2.8 .90 .40 .10 TOTAL 0 6,176.0 5,140 2,877 764.4 129.5 80.9 53.10 24. 6C 16.60 5.00 1.40 MEAN 0 206 166 92.8 27.3 4.18 2.70 1.71 .82 .54 .16 .047 MAX 0 2,900 1,500 300 11D 7.4 3.2 2.3 .90 .70 .30 .10 MN C 0 50 30 6.9 2.8 2.3 .90 .80 .40 .10 0 257 160 105

NOTE . NO GAGE-HEIGHT RECORD NOV 23 TD JAN. 3.

DISCHARGE! IN CUBIC FEET PER SECOND , MATER YEAR OCTC8ER 1966 TO SEPTEMBER 1967 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 0 83 112 56 67 130 34 12 11 64 2 0 81 102 62 79 130 30 12 10 64 3 387 70 83 63 76 133 26 12 10 54 4 77 70 76 74 97 113 23 12 9.2 51 5 2,460 70 72 65 130 58 26 12 9.2 40 6 5,460 67 70 63 107 56 32 12 9.2 29 7 3,680 67 60 62 115 58 33 11 9.6 49 8 910 62 60 62 115 67 32 10 9.6 46 9 530 60 60 60 102 86 31 10 16 42 10 350 60 60 56 96 130 31 10 9.6 42 11 296 62 62 60 166 102 30 10 9.2 29 12 270 62 72 79 139 91 30 10 9.2 26 13 240 55 74 169 127 81 30 29 9.2 49 14 196 55 65 215 130 79 26 81 19 8 15 156 55 65 ISO 130 72 24 63 51 a 16 135 58 65 139 115 74 24 62 47 8 17 120 58 64 139 112 74 24 42 63 a 18 115 56 64 139 127 74 24 18 63 a 19 110 55 64 133 150 74 24 16 63 46 20 105 55 63 133 150 74 24 15 58 40 21 100 53 63 133 172 72 20 14 58 31 22 97 127 63 130 235 72 16 18 30 18 23 96 153 60 112 205 79 16 48 52 10 24 96 255 62 115 176 79 16 45 88 8.8 25 93 318 62 102 150 76 16 37 74 9.2 26 91 133 60 96 163 76 15 15 63 8.0 27 88 127 58 81 168 67 15 14 63 8.8 28 88 124 58 81 168 63 14 12 60 14 29 B8 121 « »,« 81 158 55 13 13 34 13 30 88 104 67 145 47 12 11 33 41 31 86 106 65 40 10 52 TOTAL 0 0 16,608 2,882 1,899 3,042 4,070 2,482 711 696 1,102.0 1,072.8 MEAN 0 0 536 93.0 67.8 98.1 136 80.1 23.7 22.5 35.5 35. a MAX 0 0 5,460 318 112 215 235 133 34 81 88 64 MIN 0 0 0 53 5B 56 67 40 12 10 9.2 8.0 AC-FT 0 0 32,940 5,720 3,770 6,030 8,070 4,920 1,410 1,380 2,190 2,13(1 CAL YR 1966 TOTAL 20,560.50 MEAN 56.3 MAX 5,460 MIN 0 AC-FT 40,780 WTR YR 1967 TOTAL 34,564 .80 MEAN 94.7 MAX 5,460 MIN 0 AC-FT 68,560 SANTA ANA RIVER BASIN

11051500 SANTA ANA RIVER NEAR MENTONE, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY OCT NOV JUN JUL AUG SEP

1 33 5.6 60 8.4 5.7 7.0 6.6 4.1 2.4 .80 1.2 .40 2 9.2 5.4 31 8.4 5.1 6.0 23 4.1 2.4 .80 .80 .30 3 a. a 5.7 20 8.4 4.8 5.7 12 4.1 2.2 .80 .40 .40 4 a. a 5.4 7.0 a. 4 4.8 5.1 9.7 4.1 2.2 .80 .40 .40 5 8.4 5.1 6.6 8.0 4.8 5.1 8.0 4.1 2.4 .90 .40 .30 6 8.4 .90 .40 .30 7 a.o 5.1 .30 8 7.7 4.8 6.3 6.3 4.8 139 7.0 4.1 2.9 .60 9.7 .20 9 100 7.0 4.1 2.7 .60 6.8 .20 10 81 7.0 4.1 2.4 .60 1.4 .20 11 7.7 5.1 6.6 5.7 5.1 58 6.6 4.1 2.2 .60 1.1 .20 12 .20 13 7.7 4.8 7.0 4.8 6.0 13 6.6 .4.8 2.1 .60 .80 .20 14 7.7 5.1 6.0 4.8 6.0 12 6.3 4.3 2.1 .60 .80 .20 15 7.7 4.8 5.7 4. a 5.7 11 6.3 4.1 2.0 .60 .80 .20 16 1.9 .60 .60 .20 17 1.9 .60 .60 .10 18 7.7 4.3 17 4.1 5.1 8.8 6.6 3.5 1.7 .70 .70 .10 19 14 104 20 4.1 4.8 8.0 6.3 3.5 1.6 .80 .60 .10 20 19 106 13 4.1 4.8 7.4 5.7 3.5 1.5 .80 .60 .10 21 14 59 12 4.1 4.6 7.0 5.7 3.5 .3 .80 .60 .10 22 7.0 46 12 4.1 4.6 7.0 5.4 3.3 .3 .80 .70 .10 23 6.3 39 14 4.1 4.6 7.0 5.1 3.3 .2 .80 .60 .10 24 5.4 27 14 4.1 4.3 6.3 5.1 3.1 .2 3.4 .60 .10 25 5.1 .1 .80 .40 .10 26 5.4 6.3 13 5.1 13 6.0 5.1 2.5 .0 .60 .40 .10 27 5.4 15 11 7.4 36 8.0 5.1 2.5 .0 .60 .40 .10 28 4.8 29 11 a. 4 38 6.3 4.8 2.5 .90 .60 .40 .10 2° 4.8 27 9.7 6.3 31 6.0 4.6 2.9 .80 .40 .40 0 30 .70 .30 .40 0 31 5.1 - 8.8 5.7 .5.7 2.5 9.7 .40 TOTAL 270.7 609.0 378.4 180.9 242.9 583.4 210.1 113.1 54.50 32.90 38.70 5.40 HE AN 8. 73 20.3 12.2 5.84 8.38 18.8 7.00 3.65 1.82 1.06 1.25 .18 33 1C6 60 8.4 38 139 23 4.8 WIN 4.8 4.3 5.7 4.1 3.9 5.1 4.4 2.5 .70 .30 .40 0 AC- FT 537 1.210 751 359 482 1.160 417 224 108 65 77 11 38,110 KTR YR 1968 TOTAL 2,720.00 MEAN 7.43 M.AX 139 MIN 0 AC-FT 5.400

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTO8ER 1968 TO SEPTEMBER 1969

DAY nu» AUG SEP

1 0 .20 0 0 300 1.750 550 386 346 192 1S2 82 2 0 .10 0 0 270 1,000 500 420 364 192 ISO 104 3 0 .10 0 0 250 600 470 490 337 192 147 15S 4 .10 .10 0 0 450 520 44O 600 302 192 144 155 5 .10 .10 0 0 600 480 410 960 302 192 141 155 6 0 .20 0 0 620 440 390 880 298 192 144 168 7 0 .10 o o 620 420 440 774 290 192 141 170 8 0 0 0 0 540 400 500 640 286 186 16S 15S 9 0 0 0 1.0 450 380 390 560 282 180 180 ISO 10 0 0 0 0 360 365 335 500 274 173 158 147 11 0 0 0 0 340 350 325 450 274 170 ISO 147 12 0 0 0 0 320 340 315 400 13 c 0 0 0 310 330 310 370 258 167 138 147 14 0 0 0 91 400 325 400 340 254 164 132 147 15 0 .10 0 46 520 320 600 320 272 164 129 147

16 0 .20 0 .80 500 320 550 305 364 164 120 136 17 0 0 o .10 470 325 520 290 364 167 116 138 18 0 0 o .10 440 330 490 285 337 180 112 13B 19 0 0 O 1.0 410 335 460 275 328 198 108 13B 20 0 0 0 409 390 340 440 270 309 257 106 138 21 0 0 0 1,250 370 335 420 265 278 209 104 138 22 0 0 0 1,010 350 330 400 262 254 167 102 13S 23 0 0 0 314 330 325 380 262 240 161 100 129 24 0 0 0 1,800 320 320 360 262 230 ISO 100 129 25 0 0 0 5,720 4,500 320 335 265 220 147 98 110 26 0 0 .60 2,320 4,200 315 320 280 210 138 98 110 27 0 0 .50 2,760 3,900 310 315 300 202 161 96 108 28 0 0 .20 1.180 2.500 305 310 318 198 155 94 106 29 0 0 .10 665 ««__ ~ 300 340 330 194 150 92 96 30 0 0 .10 451 _*. 300 370 340 188 144 90 96 31 .10 0 352 300 350 144 86 TOTAL .30 1.20 1.50 !Bt371.00 25.030 13.130 12.385 12.749 8,325 5,407 3,840 4,018 MEAN .010 .040 .048 593 894 424 413 411 278 174 124 134 MAX .10 .20 .60 5,720 4.500 1.750 600 960 364 2*7 180 170 MIN 0 0 0 0 250 300 310 262 188 138 86 82 25,290 16,510 10,720 7,620 7,970 CAl YR 1968 TOTAL 1,464 .90 MEAN 4.0 MAX 139 MIN 0 AC-FT 2,910 MTR YR 1969 TOTAL 103,258 .00 MEAN 283 MAX 5,720 MIN 0 AC-FT 204,800

NOTE. NO GAGE-HEIGHT RECORD JAN. 26 TO MAY 31. SANTA ANA RIVER BASIN

11051500 SANTA ANA RIVER NEAR MENTONE, CALIF.--CONTINUED

DISCHARGE, IN CUB I C FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 DAY OCT NOV DEC JAN FEB MAR APR HAY JUN JUL AUG SEP 1 93 63 59 48 50 369 56 56 .7 .44 .10 .60 2 91 62 57 47 49 245 56 55 .3 .44 .10 .60 3 68 61 56 47 46 69 56 54 .6 .44 .10 .60 4 87 60 56 46 47 76 56 53 .5 .44 .10 .60 5 67 59 55 47 46 90 57 53 .4 .44 .10 .60 6 87 70 55 47 47 73 57 52 .4 .44 .10 .60 7 65 114 55 47 46 67 57 52 .4 .44 .10 .70 e 85 70 54 47 46 65 58 52 .4 .44 .10 .70 9 62 70 54 47 45 62 56 51 .3 .44 .10 .70 10 62 74 54 63 53 81 56 51 .3 .44 .10 .70 11 81 70 54 59 62 69 57 50 .2 .44 .10 .70 12 81 66 54 59 54 63 57 50 .2 .44 .10 .70 13 60 64 53 55 52 59 57 50 .1 .39 .10 .60 14 80 62 53 54 52 61 57 46 .1 .35 .10 .60 15 79 64 52 54 50 62 58 44 .98 .35 .10 .60 16 79 67 52 62 49 62 56 42 .96 .35 .10 .60 17 78 64 52 70 49 62 59 42 .90 .31 .1C .60 IB 77 64 52 59 49 62 58 26 .90 .31 .10 .60 19 76 65 51 55 50 71 54 5.3 .82 .31 .10 .50 20 75 64 51 54 51 113 54 4.3 .62 .31 .10 .50

21 74 62 50 52 49 148 55 4.1 .75 .27 .10 .50 22 73 61 50 52 49 104 59 3.9 .75 .27 .10 .50 23 72 61 50 52 46 69 59 3.4 .66 .23 .10 .50 24 71 60 49 52 46 67 57 4.1 .66 .20 .10 .50 25 70 60 49 52 45 66 55 4.3 .61 .17 .10 .40 26 69 59 49 52 44 63 54 4.5 .55 .13 .10 .40 27 66 57 48 51 44 62 62 4.3 .55 .11 1.5 .40 28 67 56 46 51 269 61 61 4.3 .49 .10 1.1 .40 29 66 61 46 .49 .10 .90 .40 30 65 61 46 50 63 58 3.2 .49 .10 .90 .40 31

MEAN 77.6 65.1 52.1 52.7 56.6 66.0 57.3 30.2 1.08 .31 .25 .60 KAX 93 114 59 70 269 369 62 56 2.7 .44 1.5 .60 65 19 16 36

CAL YR 1969 TOTAL 109, 236.00 MEAN 299 MAX 5,720 KIN 0 AC-FT 216.700

NOTE. NO GAGE-HEIGHT RECORD JULY 28 TO SEPT. 30.

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SANTA ANA RIVER AND SOUTHERN CALIFORNIA EDISON CO.'S CANAL

DAY OCT NOV

1 IS 15 49 37 33 29 2 15 IS 90 3 15 15 4 15 15 80 48 35 31 27 5 19 15 75 47 35 31 11

6 20 15 70 127 138 60 58 48 "47 35 31 27 7 20 16 65 124 117 60 58 48 48 35 31 26 B 9 16 9 9 16 49 35 30 26 10 9 17 100 79 91 59 56 53 47 34 29 26 11 8 17 95 12 5 17 90 83 81 61 56 51 44 34 29 26 13 5 17 85 14 15 19 60 86 69 64 56 51 42 34 29 26 IS 16 28 75

16 17 38 43 32 30 26 17 17 55 18 17 78 43 32 29 26 19 17 23 80 43 32 29 28 20 15 14 75 70 66 61 55 149 43 30 29 29 21 IS 28 70 63 66 61 55 SO 42 30 28 27 22 15 1 23 15 2 ,900 60 62 66 61 53 50 42 39 28 25 2U 15 400 60 63 66 61 52 49 40 36 26 25 25 15 450 55 56 64 61 51 49 40 37 28 25 it, 15 250 55 27 15 39 34 26 26 28 15 ISO 50 88 61 56 50 50 36 34 28 26 29 15 125 1,500 78 59 49 46 38 35 28 27 30 15 too 1,000 106 ...... 59 U9 49 36 36 26 28 31 15 500

MEAN 16.2 219 166 MAX 20 2 ,900 1,500 300 136 64 60 53 49 39 33 29 HIN 15 14 50 56 61 58 49 47 36 30 26 25 SANTA ANA RIVER BASIN

11051500 SANTA ANA RIVER NEAR MENTONE, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SANTA ANA RIVER AND SOUTHERN CALIFORNIA EDISON CO.'S CANAL NEAR MENTONE, CALIF., WATER'YEAR OCTOBER 1966 TO SEPTEMBER 1967 ocr DEC AUS SLP

1 28 2a 27 83 112 56 67 I 28 2a 27 81 102 62 79 130 lla 75 62 B 3 30 25 399 70 83 63 76 UJ 109 74 60 7 31 25 78 70 76 74 97 135 106 75 58 6 5 31 6 30 26 5,U60 67 6 7 29 3a 3,680 67 60 62 115 144 101 75 60 6 e 28 02 911 62 60 62 115 152 104 72 63 6 4 27 3? 530 60 60 60 102 171 103 71 67 5 10 Jl 30 350 60 60 56 96 214 103 69 60 5 11 32 186 100 69 59 6 12 13 59 6 14 29 27 196 55 65 215 130 161 99 105 61 6 IS 20 26 156 55 65 150 130 155 96 87 69 6 16 28 26 135 58 65 139 US 159 94 86 73 6 17 28 85 6 18 127 160 91 78 82 6 19 27 27 110 55 6a 133 150 160 91 74 81 6 20 27 28 105 _5S 63 133 ISO 160 91 71 75 5 21 27 29 100 53 63 133 172 158 89 70 75 56 22 27 28 97 127 63 130 235 152 85 66 68 57 23 26 28 96 153 60 112 205 152 85 70 90 52 24 26 28 96 255 62 115 176 147 85 67 88 52 25 26 27 93 318 81 53 26 25 27 91 133 60 96 163 152 84 65 80 52 27 25 26 88 127 58 81 168 152 84 64 7975 53 28 26 26 88 12a 58 81 168 148 82 64 61 29 26 26 88 121 81 62 62 30 25 88 31 21 1,853 MEAN 27,7 27.7 538 93.0 67.8 98.1 136 153 95.7 73..4 69.4 61.8 MAX 32 a2 5,160 318 112 215 235 214 119 105 90 83 MIN 24 2a 27 53 58 56 67 125 78 60 57 52 4,270 3,680

COMBINED DISCHARGE, IN CUBIC FEET PER SEC OND, OF SANTA ANA RIVER AND SOUTHERN CALIF ORNIA EDISON CO.'S CANAL NEAR MENTONE , CALIF ., MATER YEAR OCTOBER 1967 TO SEPTEMBER 19 68 DAY OCT NCJV DEC JAN FE8 MAR APH MAY JU « JUL «UG SEP 1 65 UJ 73 59 a7 41 59 52 4 34 36 26 2 57 43 58 SB lib 40 89 52 4 33 35 26 J 57 aa 57 57 46 51 72 52 4 33 32 26 4 55 uj Sa 53 a6 50 68 52 4 32 33 26 5 53 83 S3 53 6 S3 82 52 S3 43 53 63 51 4 33 32 30 7 52 02 53 52 43 55 60 50 4 36 38 31 8 51 42 as 51 43 166 59 SO 4 37 31 31 9 51 42 a7 51 52 100 59 50 4 JU 31 J2 10 119 112 a7 SI 54 81 SB 50 4 32 33 32 11 a9 al a? 51 a'951 75 58 50 4 31 32 33 12 119 ai lib a9 55 58 54 4 30 32 33 1] 119 al aa a9 59 61 57 S3 4 30 32 33 1« a8 al a2 a9 55 63 56 51 4 29 J 3 15 U8 SI U5 49 53 64 56 49 4 29 34 3 16 a8 54 SO a9 52 64 57 48 3 » 33 36 3 17 in 55 50 ar 5a 61 59 47 3 35 38 3 18 al S! 67 a6 56 60 59 46 3 19 60 123 20 65 120 60 46 55 35 21 65 91 35 22 33 33 23 511 61 67 45 53 54 S3 49 50 44 31 32 24 52 63 68 45 S2 S3 52 49 50 37 30 31 25 SI 56 7 «_ aS 51 53 S2 a7 38 tt2 28 31 26 51 53 71 46 37 53 S3 U6 36 38 28 30 27 aa 52 28 30 28 aa 65 67 as «2 52 52 aa 3 aa 28 29 29 41 27 30 JO aa 86 62 aa ...... 53 51 aa y 35 27 30 Jl a} 61 47 26 1.003 937 MEAN SI. 6 56.9 57. 5 tt9.3 49.6 60.9 S8.4 48. 7 al.tt 3S.1 32.4 31.2 tux 65 123 73 S9 59 166 89 54 SO 4(1 40 35 MIN a! al 42 al 37 ao 51 4tt 35 29 26 26 AC-FT 3,180 1,390 3,530 3,030 2,850 j SANTA ANA RIVER BASIN

11051500 SANTA ANA RIVER NEAR MENTONE, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SANTA ANA RIVER AND SOUTHERN CALIFORNIA EDISON CO.'S CANAL NEAR MENTONE, CALIF., WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

D4Y UCT DEC JAN FEB AUS SEP t 32 30 28 27 300 1,750 550 386 306 192 152 82

3 30 302 192 Ul 155 6 32 27 27 28 620 040 390 880 298 192 10

11 28 26 28 28 340 3SO 325 050 270 170 150 1S1 11 27 28 28 35 310 330 310 370 256 167 138 151 15 28 35 26 60 520 320 600 320 272 160 129 1S1 16 28 32 28 SOO 320 550 305 360 16(1 120 UO 18 27 2" 25 37 UOO 330 U90 285 337 180 112 U2 19 26 28 26 48 010 335

21 26 26 21 1,250 370 335 420 265 278 209 104 U2 22 26 28 23 1,010 3SO 330 000 262 250 167 102 139 23 26 26 26 310 330 325 380 262 200 161 100 133 2« 26 28 27 1,800 320 320 360 262 230 IbO 100 133 25 2S £6 31 4,530 0,500 120 335 265 220 U7 98 1U

27 30 26 28 2,760 3,900 310 315 300 202 161 96 111 2B 33 28 30 1,180 2,500 305 310 316 198 155 9U 109 29 34 28 29 66S 300 300 330 19U 150 92 99 30 37 28 28 188 100 90 99 31 30 300 350 100 86

MEAN 29.2 28.2 27.il 612 8911 U?il 013 Oil 277 170 124 137

MIN 25 26 21 21 250 300 310 262 188 138 86 82

MEAN 289 MAX 4,530 MIN 21 AC-FT 208,900

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SANTA ANA RIVER AND SOUTHERN CALIFORNIA EDISON CO. NEAR MENTONE, CALIF., MATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

OCT NOV JUN JUL AUG SEP

2 90 66 62 52 511 205 63 61 a2 27 2a 32 3 91 05 61 52 53 90 63 60 a2 26 23 31 a 90 6

11 86 72 59 62 65 72 61 55 39 26 22 32 12 66 68 59 63 57 66 61 56 39 28 23 36 13 86 66 58 60 55 62 62 56 ao 26 26 37 IS 85 66 57 59 53 6S 63 52 39 26 28 36 16 80 70 57 67 52 65 63 56 36 2a 35 35 18 82 66 57 6

MEAN 82. S 66.3 57.1 57.6 60. S 91. a 62. S S3.1 ' 36.3 26.9 27.6 31.1 M1N 68 62 53 52 08 62 60 as 28 2a 22 27

MIN 22 AC -FT 39,530 SANTA ANA RIVER BASIN

11051600 SANTA ANA RIVER SPREADING DIVERSION NEAR MENTONE, CALIF.

LOCATION.--Lat 34°06'12", long 117°06'37", in SW%NW»«NE% sion channel 0. son Co. s powerhouse o . an 2. mi es nort east of Mentone PERIOD OF RECORD. - -October 1951 to Septembe r 1970 (monthly discharges only 1951-65). Daily discharges 1952-65 n files o f the district office. 3AGE. --Water-stage EXTREMES. --Period of record : Maxi Ttum daily discharge, 129 cfs Mar. 1, 1970; no flow for long periods in each year. g on debris cone c'ownstrea m from TlOUth Of Santa Ana River Canyo n. Diversion began prior to 1951.

WTR YR OCT NOV DEC JAN FEE MAR APR MAY JUN JUL AUG SEP THE YR 952 0 0 484 2, 670 1 350 2,940 822 513 6.7 0 0 0 8, 90 953 0 367 767 1, 220 93 137 58 11 0 00 02, 50 954 0 0 0 592 1 3,210 00 00 06, 70 955 0 147 384 847 1, 240 1,100 0 42 0 00 03, 60

956 0 0 0 466 696 51 21 00 00 01, 30 957 0 0 0 852 949 980 46 91 4.4 00 02, 20 958 0 90 959 0 0 0 100 722 326 0 000 1.2 0 1, 50 960 0 9.1 0 00 01, 40

961 0 55 0 8.9 0 0 0 00 0 .2 0 64 962 0 0 60 963 0 0 0 0 199 63 178 13 0 00 137 90 964 0 00 965 0 0 120 145 37 80 2,930 152 0 00 0 3, 60

1 0 29 35 21 12 .50 0 2 U jj b2 11 9.4 .50 0 3 11 29 43 9.6 .50 .50 0 4 U 24 3H 9.6 .50 .50 ' 0 S 0 24 33 13 .50 .DO (1 6 22 Js 1* .50 ".30 0 ? 0 211 30 40 .50 0 tl 8 ij 19 32 35 .50 0 0 9 0 5J 3* 34 .50 0 0 10 0 b4 33 34 .50 [1 0

11 1, 44 3? zr .50 0 0 12 0 50 30 21 .50 0 .40 U 0 41 29 17 .50 (1 0 14 U 39 22 )<6 .50 0 0 15 .Bo 35 14 16 .50 0 U

16 ,4 35 13 \t> .50 0 I) 17 44 34 23 I ^ .50 0 0 18 67 30 34 13 .50 0 0 19 23 22 31 13 .50 0 0 20 12 14 35 13 .50 0 0 21 13 10 35 13 .50 7.2 n 22 10 12 34 13 .SO 7.1 0 23 0 12 33 16 .50 0 0 24 4.4 9.6 35 18 .50 0 0 25 11 9.1 33 18 .50 0 0 26 45 7.6 34 18 .50 0 0 it 42 b.l 33 18 .50 0 0 28 52 lg 31 15 .SO 0 0 29 49 3? 33 _«.. .50 0 0 30 41 39 ...... 50 o o 31 0 33 .50 TOTHL 0 42B.2U 771.4 1.003 520.2 3S.90 17.10 o .40 n o 0 MEAN 0 14.3 24.9 32.4 18.6 1.16 .sr o .013 o o 0 M»X 0 67 64 t>^ 40 12 7.2 0 .*0 0 0 0 MIN o 0 0 13 9.6 .50 00000 n »OFT 0 S49 1.530 1.990 1.030 71 34 0 .=. 0 0 n t 5.720 »TH YR 1966 TOTA SANTA ANA RIVER BASTN

11051600 SANTA ANA RIVER SPREADING DIVERSION NEAR MENTONE, CALIF.--CONTINUED

10T4L n 0 1,102. 7u 906 61V 6H1.70 1,102. SO 1.0 .30 106.0 lax n ii rv bH .10 36 UN n o 01* 11 ,30 .311 d ll (1 At-FT 0 I) <>.?70 1.800 lf«i) 1.330 ^,190 ?.3 .h 210

IK Y« 1967 TOT41 O.b37.bu Ht»N 12.3 »i,» 79 MlN 0 «C-F1 J.0«.0

JUM JJL

.10 l.SO .003 .048 .10 1.2 SANTA ANA RIVER BASIN

11051600 SANTA ANA RIVER SPREADING DIVERSION NEAR MENTONE, CALIF.--CONTINUED

11 li 0 65 72 103 111 9". 57 It (I 1) 72 SJ 111 lit 9i 56 9 13 It 1.9 72 b7 113 113 91 ife 1 1 III 0 78 ^3 52 11» 11? 91 56 0 Ib 0 42 79 49 122 112 91 5ft 3

16 0 it PI 48 122 116 n 55 3 1 1 0 21 Hi 62 120 119 95 56 3 1« (l 21 93 71 116 116 95 59 3 19 0 37 95 110 112 20 .10 92 95 »e> 110 110 95 66 1

UTAL 7.07 PS CANl 0 u 2.48 lb. 7 4f.y ?0.0 lOb 1 11 94.4 SB. 4 27.3 2b. AX 1) il If 92 102 122 125 51 6 IN n u o o o fl 11 97 B"l 37 0 OFT

24 2.U 21 m 24 129 f> 6.6 24 2.0 IB 21 16 126 1 1 1.5 24 2.0 14 29 10 90 7.2 n 24 1.5 9.1 29 9.h 79 3.4 0 24 1.3 6.2 2B 6.2 96 3.0 0

24 3.0 h.2 23 4.7 80 3.0 0 18 0 6.2 10 2.h 7b l.B n 11 0 11 9.6 1.0 71 o 0 10 S 18 9.6 l.U 55 n n

IN 14.3 2.13 i 24 60 28 3ft 5j 129 25 > 10 1.5 6.2 9.6 1.8 21 0 FT 8/9 2.050 1,020 1.460 1.270 3,350 l?f

TOTau 1B.952.UO ME/IN 51.9 M4X 12b HIM 0 «C-FI 37.590 140 SANTA ANA RIVER BASIN

11054000 MILL CREEK NEAR YUCAIPA, CALIF. LOCATION.--Lat 34°05'27", long 117°02 t 12", in NWcNE'tNEJs sec.13, T.I S., R. 2 W. , San Bernardino County, on left bank 50 ft downstream from bridge on State Highway 190-D, 3.9 miles north of Yucaipa, and 5.3 miles upstream from mouth. DRAINAGE AREA.--42.4 sq mi (revised). PERIOD OF RECORD.--January 1919 to September 1938, October 1947 to September 1970. Monthly figures only for April and May 1923, published in WSP 1315-B. Prior to October 1954, published as "near Craftonville." GAGE.--Water-stage recorder on creek; water-stage recorder and sharp-crested weir on power canal No. 1; water- stage recorder and Parshall flume on power canals Nos. 2 and 3. Datum of gage is 2,916.36 ft above mean sea level (Southern California Edison Co. bench mark). See WSP 1928 for history of changes prior to Mar. 3, 1938.

EXTREMES. --Maxi.nums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (100 cfs ITS 1966-70 Creek only Combined Wtr yr Date Time Discharge G H. Date Discharge 1966 Nov. 17 1965 0800 180 6 90 Nov. 17 1965 180 Nov. 22 1965 1900 *10,000 14 35 Nov. 22 1965 10,000 Dec. 29 1965 _ 5,000 Dec. 29 1965 5,000 Feb. 6 1966 1400 130 7 75 Feb. 6 1966 130 1967 Dec. 3 1966 Dec. 3 1966 Dec. 6 1966 2130 no, ooo 14 48 Dec. 6 1966 10,000 Jan. 24 1967 2130 204 7 97 Jan 24 1967 230 July 11 1967 1800 143 7 58 July 11 1967 143 Aug. 23 1967 1530 321 8 27 Aug. 23 1967 321 Sept. 29 1967 1730 240 8 00 Sept .29 1967 245 1968 Nov. 19 1967 0930 *324 8 28 Nov. 19 1967 331 Mar. 8 1968 0730 122 7 75 Mar. 8 1968 147 1969 Jan. 14 1969 0745 102 7 83 Jan. 14 1969 102 Jan. 21 1969 1000 848 9 98 Jan. 21 1969 848 Jan. 2S 1969 1630 35,400 a!6 8 Jan. 25 1969 35,400 Feb. 25 1969 0630 7,500 13 5 Feb. 25 1969 7,500 May 24 1969 2000 540 8 03 May 24 1969 563 1970 Mar. 1 1970 0600 *136 7 03 Mar. 1 1970 158 a From floodm rks. imum daily discha years 1966-70

Creek only Combined Wtr yr Date Discharge Date Discharge 1966 Many days 0 19, 1965 1967 Several days 0 Nov. 15-20, 23, 24, 1966 1968 Many days Ca) 1969 do. Jan. 18, 1969 1970 July 14-18, Sept.19-30, 1970 July 10, 1970

a Aug. 25, 26, Aug. 28 to Sept. 1, Sept. 25-28, 1968.

Period of record: Maximum discharge (creek only), 35,400 cfs Jan. 25, 1969 (gage height, 16.8 ft, from floodnark), from rating curve extended above 1,100 cfs on basis of 2 field estimates at gage height 14.5 ft and slope-area measurement of peak flow; no flow at times in some years. (Combined): Maximum discharge, 35,400 cfs Jan. 25, 1969; minimus daily, 2.7 cfs Feb. 23, 1949. REMARKS.--Records poor. No regulation above station. Mill Creek power canals Nos. 1, 2, and 3 divert from points 100 ft, 3 miles, and 6 miles, respectively, above station. Combined flow of Mill Creek and Mill Creek power canals Nos. 1, 2, and 3 is given in tables herein. See schematic diagram of Santa Ana River basin

COOPERATION. --Water-stage-recorder ph and 51 discharge measurements for Mill Creek power canals Nos. 2 and 3 furnished by Southern Californi Ed n Co., in connection with a Federal Power Commission project. REVISIONS (WATER YEARS).- -WSP 1635: 1928(M), 1936, 1950(M). SANTA ANA RIVER BASIN

11054000 MILL CREEK NEAR YUCAIPA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

CAY OCT NOV DEC JUN JUL AUG SEP I .10 .10 37 56 9.0 7.0 4.4 1.8 .10 .10 0 0 2 .10 .1 0 35 54 1C 5.0 2.5 2.5 .10 .10 0 0 3 .10 .1 0 34 42 9.0 6.6 2.4 2.4 .10 .10 0 .30 4 .10 .1 0 33 40 9.0 7.0 2.5 2.8 .10 0 0 .50 5 .10 .10 31 47 9.0 6.0 2.8 3.1 .10 0 0 ..10 6 .10 .10 30 46 73 7.0 2.8 2.8 .10 0 0 .10 7 .10 .1 0 29 45 44 6.0 3.1 1.0 .10 0 0 0 a .10 .1 0 28 44 22 5.0 2.8 .10 .10 0 0 0 9 .10 .1 C 26 29 14 5.0 2.5 0 .10 0 0 0 10 .10 .10 24 20 14 6.0 5.5 5.8 .10 0 D 0 11 .10 .1C 23 18 14 6.0 9.1 6.8 .10 0 0 0 12 0 .1 0 21 18 12 6.C 8.2 6.0 .10 0 0 0 13 0 .1 0 20 15 13 6.0 1.3 4.6 .10 0 0 0 14 0 .1 0 26 11 12 6.0 .30 . .90 .10 0 0 0 15 0 .30 18 9.0 13 6.0 .30 .10 .10 0 0 0 16 .10 16 17 10 12 6.0 .40 .10 .10 0 0 0 17 .10 64 17 10 12 9.0 .90 0 .10 0 7.0 0 18 .10 20 17 B.O 12 6.0 2.2 0 .10 0 12 0 19 .10 8.6 17 10 9.5 1.0 3.9 0 .10 0 3.1 0 20 .10 7.1 18 8.0 9.0 1.0 3.1 .10 .10 0 .20 0 21 .10 1.5 19 28 9.0 1.0 2.6 .10 .10 0 .10 0 22 .10 2,290 19 27 7.0 0 2.6 0 .10 .30 .10 0 23 .1C 50C 19 27 7.0 4.0 2.0 .10 .10 .10 .10 0 24 .10 300 19 25 7.0 10 1.9 0 C 0 .10 0 25 .10 150 19 26 7.0 10 1.9 0 0 0 .10 0 26 .10 59 19 25 8.0 7.0 1.6 0 0 0 .10 0 27 .10 49 20 25 7.0 6.0 3.7 0 0 0 .30 0 28 .10 44 19 24 7.0 5.5 6.8 0 0 0 .20 0 29 .10 41 24 s.'o 6.8 0 .10 0 .10 0 30 .10 39 too 15 3.6 0 .10 0 .30 0 31 .10 ov 20 4.7 .10 0 0 TOTAL 2.70 3,590.90 1,301 806.0 390.5 175.2 94.50 41.20 2.50 .70 23.80 1.00 .023 .77 .033 MAX .10 2,290 487 56 73 10 9.1 6.8 .10 .30 12 .50 KIN 0 .10 17 8.0 7.0 0 .30 0 0 0 0 0 AC-FT 187 5.0 1.4 47 2.0 ,280 ,750 NOTE. NO GAGE-HEIGHT RECORD OR STAGE-DISCHARGE RELATION INDEFINITE NOV. 23 TO MAR. 27.

DAY OCT N( JUN JUL AUG SEP

1 0 C .10 24 10 5.0 6.2 20 52 5.2 11 28 2 0 0 .10 23 10 5.0 6.0 19 47 7.3 12 39 3 0 0 250 23 8.4 5.0 5.2 19 45 11 8.2 20 4 0 0 15 22 6.0 5.0 IS 21 43 13 8.2 17 5 5.9 .20 820 21 3.3 5.2 15 21 43 13 8.2 16 6 4.2 0 3,200 20 3.1 5.4 13 21 43 13 9.6 25 7 1.1 8. 760 20 3.1 5.4 14 21 41 13 9.6 30 8 1.0 12 390 19 6.9 14 6.2 24 39 14 9.3 13 9 .20 2. 240 18 12 12 3.5 41 38 12 12 13 10 2.5 1. 180 17 12 5.4 3.1 41 34 10 14 12

11 2.8 1. 14C 17 10 5.4 24 41 28 27 15 10 12 1.6 2. 110 17 8.7 6.0 12 34 27 57 11 8.0 13 .80 1. 80 16 8.4 20 4.5 32 26 60 9.6 7.5 14 .50 1. 65 14 6.4 32 6.0 29 23 41 20 7.0 15 .80 1. 55 10 3.9 14 4.5 29 22 23 26 6.0 16 .70 1. SO 34 21 21 25 5.0 17 .50 0 45 16 5.0 6.7 8.4 36 20 17 23 3.3 18 1.0 0 41 16 5.0 5.0 10 36 8 15 21 14 19 1.3 ' . bO 39 16 5.2 5.2 10 36 6 17 20 16 20 1.3 1.0 36 16 5.2 5.4 9.3 37 5 15 20 16 21 .40 1.0 35 12 5.2 5.4 15 40 4 12 15 16 22 .20 >0 33 27 5.4 5.0 21 44 4 10 15 11 23 .20 0 32 33 5.4 4.3 13 46 3 9.3 48 5.0 24 .20 SO 31 SB 5.4 7.2 11 44 2 9.6 25 5.0 25 .20 .40 30 48 5.4 9.0 9.6 44 9.2 9.0 14 5.0 26 .20 .50 29 19 5.4 6.4 7.9 51 4.5 8.4 13 5.0 27 .80 iO 28 14 5.4 6.2 23 54 8.8 8.7 12 5.0 28 .50 0 27 12 5.0 6.2 10 55 7.6 8.4 11 10 29 .20 >0 26 11 6.7 29 59 4.5 8.4 8.7 31 30 .20 .20 25 11 - - 6.0 21 58 4.7 8.2 10 29 31 10 6.4 57 17 TOTAL 29.50 41.30 6,837.20 614 MEAN .95 1.38 221 19.8 6.40 7.83 11.4 36.9 24.4 16.3 15.5 uls MAX 5.9 12 3,200 58 12 32 29 59 52 60 48 39 HIM 0 0 .10 10 3.1 4.3 3.1 19 4.5 5.2 B.2 3.3 AC-FT 59 82 13,560 1,220 356 481 681 2,270 1,450 1.000 955 849

MIN 0 AC-FT 22,970

NOTE . NO GAGE-HEIGHT RECORD DEC. 8 TO JAN. 11. SANTA ANA RIVER BASIN

11054000 MILL CREEK NEAR YUCAIPA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

1 21 0 14 0 0 0 25 1.7 .10 0 .0 .10 2 12 0 3.5 11 .10 D 36 .90 .20 0 .2 .10 3 4.0 0 0 9.3 .90 0 33 0 .10 0 .3 .10 4 .20 0 0 4.0 I'.l1.1 0 15 .10 .10 .10 .0 .10 5 .20 .20 0 0 0 .10 .10 .10 .10 .0 .10 6 .20 0 C 0 1. .10 .10 0 .20 .10 .1 .10 7 .20 0 a 0 . 0 0 .ID .20 .20 .50 .5 .10 8 2.0 0 0 0 1. 38 .10 2.0 .10 .50 .6 .10 9 2.0 0 a 0 . 0 9.6 0 4.5 .10 0 .7 .10 10 4.0 .30 .10 0 . 0 2.6 0 0 .20 0 .7 1.0 11 .40 0 .10 0 1.4 0 0 2.4 .20 .10 .0 .ID 12 0 0 C .10 1.6 0 0 7.0 0 .10 .0 .10 13 0 0 .20 .10 1.8 0 0 4.1 .10 .10 .10 .80 14 0 0 1.2 .10 .40 0 0 .10 .20 0 .70 .80 15 C 0 0 0 .10 0 0 .30 .50 0 .60 .80 16 C 0 0 0 0 0 0 0 .10 0 .80 1.0 17 0 C 0 0 1.0 0 0 0 0 0 .60 1.5 18 0 0 13 0 1.3 0 0 0 0 0 .80 .20 19 C 166 14 0 .30 0 0 1.6 0 0 1.0 0 20 0 95 6.2 0 0 C 0 3.5 0 0 1.0 0 21 .50 40 3.4 C 0 0 0 2.0 0 0 .1C 0 22 0 31 .50 0 .10 0 0 0 0 0 .10 0 23 0 30 .60 0 0 0 0 0 0 e.o .10 0 24 C 19 . .70 0 .40 0 0 0 0 6.0 .10 0 25 C 8.0 0 0 .10 0 0 0 0 2.6 .10 1.0 26 .20 9.0 0 0 0 0 .10 0 0 1.2 .20 1.0 27 C 9.C 0 2.0 0 0 .10 0 0 .10 .10 1.0 28 C 9.4 0 0 0 0 0 0 0 5.8 .10 .10 29 0 7.6 .10 0 0 C 0 0 0 20 .10 .10 30 0 15 .70 .60 0 .so 0 0 17 .10 .10 31 0 14 .10

MEAN 1.51 14.7 1.97 .88 .55 1.62 3.68 .98 .083 2.46 1.71 .35 MAX 21 166 14 11 1.8 38 36 7.0 .50 20 8.6 1.5 KIN 0 0 0 0 0 0 0 0 0 0 .10 0 AC-FT 93 872 121 54 32 100 219 61 5.0 151 105 21

DISCHARGE . IN C UBIC FEET PER SECOND, MATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY OCT NOV DEC JUN JUL AUG SEP 1 2.0 .0* .04 0 162 400 246 392 435 139 54 13 2 3.7 3 3.9 .06 .02 0 127 450 25S 4DO 430 132 49 12 4 1.8 .06 .02 0 125 410 240 408 410 131 47 11 5 1.6 .06 .02 0 138 380 249 408 390 127 46 9.0 6 1.7 .04 .02 0 151 360 282 408 370 125 45 9.0 7 1.7 .04 .02 0 128 350 243 412 368 123 45 7.9 8 1.7 .C4 .02 0 127 340 230 412 356 122 45 7.0 9 3.4 .04 .04 0 125 6.7 10 3.5 .04 .04 0 125 320 240 420 320 116 40 7.0 11 .82 .C4 .04 0 113 38 5.7 12 .37 .04 .02 0 122 300 240 428 270 110 37 5.7 13 36 6.0 14 .50 .C4 .02 53 120 28S 23B 435 246 110 36 5.2 15 .37 .04 .02 22 122 282 246 438 232 110 36 5.2 16 .20 .02 .02 16 118 5.2 17 .37 .02 .02 14 118 270 258 450 22C 106 32 4.7 18 4.5 19 .25 .02 .02 35 4.7 20 .16 .02 .02 63 122 91 22 4.5 21 .12 .02 .02 291 122 88 21 4.5 22 .09 .02 .02 94 122 249 306 473 188 83 19 4.5 23 .06 .02 .02 38 134 240 321 476 24 .04 .02 .02 321 261 235 330 4BO 172 74 17 3.7 25 .02 456 164 71 16 3.7 26 .37 .04 .31 4.290 1,460 225 3.7 158 71 16 4.5 28 .37 .04 .02 280 500 220 557 400 150 64 16 3.3 29 .20 .04 .02 232 218 368 395 148 59 16 2.B 30 .06 .04 .02 172 232 380 400 140 59 14 3.3 31 .02 .02 164 243 415 56 13

97 B 1S4.1 MAX 3.9 .06 M1N .02 .02 .02 0 118 21B 230 392 140 56 13 2.8

MIN 0 AC-FT 813 ,500 SANTA ANA RIVER BASIN

11054000 MILL CREEK NEAR YUCAIPA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 JUN JUL AUG SEP 1 t.1 2. 0 1.2 .57 .37 9 ) 1.1 .50 .31 .12 .04 .04 3 .4 1. l> .73 .50 .31 2 { .43 .50 .74 .09 .04 .04 4 .9 1. Z .73 .50 .31 5.2 .38 .50 .37 .06 .04 .04

6 .6 6. i .82 .73 .31 .73 .31 .50 .37 .09 .04 .04 7 .4 17 .73 .73 .31 .37 .31 .43 .37 .06 .04 .04 8 .3 9. i .82 .73 .31 .30 .31 .43 .37 2.7 .04 .04 10 .8 7. S .73 2.6 1.6 1 .31 .37 .37 .12 .04 .04 11 .3 5. ! .82 1.6 1.0 .2 .31 .37 .37 .09 .04 .04 13 1 5. } .92 2.4 3.0 .2 .37 .31 .37 .04 .04 .06 14 I 4. 1.0 2.3 6.0 .3 .37 .25 .37 .02 .04 .06 15 1 5. ) 1.7 .82 6.0 .0 .37 .25 .37 .02 .04 .04 16 .6 5. > 1.0 3.3 7.0 .4 .37 .25 .37 .02 .04 .04 17 .6 4. .65 7.0 8.0 .1 .37 .31 .31 .02 .04 .04 IB .4 5. I .65 1.6 11 .4 .37 1.0 .31 .02 .04 .04 19 .4 13 .73 "6.4.82 12 .8 .37 .50 .31 .04 .04 .02 20 .6 19 .50 12 .9 .37 .37 .37 .04 .04 .02 21 .6 19 .50 12 11 .7 .50 .16 .43 .06 .04 .02 22 .4 19 .50 4.7 10 .6 .57 .16 .37 .09 .04 .02 24 .3 19 .57 .37 9.0 .3 .43 .16 .25 .09 .04 .02 25 .3 12 .73 .37 9.0 .1 .43 .16 .25 .09 .04 .02 26 .4 4. .9 .37 10 .8 .43 .16 .25 1.4 .04 .02 27 .4 3. .4 .37 10 .5 .73 .16 .20 1.8 .04 .02 29 .6 2. .7 .31 _____ .8 .50 .31 .20 .04 .04 .02 30 .8 1. .3 .31 ______.7 .50 .37. .20 .04 .04 .02

1.02 .034 MAX 14 1 6.4 12 12 93 1.1 .74 3.9 .04 .06 C1N .3 1. AC-f T i 27 22 20 23 2.5 2.0 AN 178

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF MILL CREEK AND MILL CREEK POWER CANALS NOS. 1, NEAR YUCAIPA, CALIF., WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

12 2,310 52D 320 170 80

TOTAL ,988.9 MEAN 133 PAX 2,310 B.6 I SANTA ANA RIVER BASIN

11054000 MILL CREEK NEAR YUCAIPA, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF MILL CREEK AND MILL CREEK POWER CANALS NOS. 1, 2, AND 3

28 19 33 40 29 18 22 60 48 46 62 83 40 45 36 59 31 59 47 _____ 47 81 44 39

MEAN 18.1 241 50.8 42.0 44.0 48.8 67.9 59.9 47.2 43.4 40.9 MAX 25 31 3,200 88 47 59 62 83 80 65 72 59 MIN 18 15 20 41 38 32

MIN 15 AC-FT 36,110

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF MILL CREEK AND MILL CREEK POWER CANALS NOS. 1, NEAR YUCAIPA, CALIF., WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

28 27 28 28 27 28 38 28 31 32 35 34 29 24 25 23 27 178 34 28 30 32 35 35 30 24 24 24 28 24 24 24

31 26 30 29 33 32 30

TOTAL 875 1,073 910 B86 868 1,029 1,036 1.070' 907 831 MEAN 28.2 35.8 29.4 28.6 29.9 33.2 34.5 34.5 30.2 26.8 MAX 33 178 38 34 33 65 36 37 34 31 HIN 26 26 27 27 28 30 33 32 28 24 SANTA ANA RIVER BASIN

11054000 MILL CREEK NEAR YUCAIPA, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF MILL CREEK AND MILL CREEK POWER CANALS NOS. 1, 2, AND 3

CAY OCT JUN JUL AUG SEP 1 21 22 21 17 162 4CO 254 415 458 162 90 59 2 24 22 21 15 130 380 254 423 473 156 90 59 3 24 22 21 17 127 450 266 423 453 155 90 57 4 25 22 20 18 125 410 250 431 433 154 89 56 5 26 22 20 18 138 380 261 431 413 ISO 89 54 6 26 22 20 17 151 360 296 431 393 148 88 54 7 26 22 20 17 128 350 262 434 391 146 82 53 8 25 21 20 17 127 340 253 435 379 145 81 52 9 22 21 20 17 125 330 258 439 369 146 82 51 1C 22 21 20 16 82 51 11 23 21 20 16 23 310 266 447 322 136 84 50 12 23 21 19 16 22 300 263 451 292 133 83 51 133 82 51 14 24 21 19 53 20 288 261 456 246 133 78 49 15 22 23 19 22 22 290 268 461 232 135 74 49

16 22 23 19 16 118 284 268 464 222 142 74 49 17 22 23 19 16 118 278 281 472 234 144 75 49 18 23 22 19 14 123 276 290 476 237 139 74 48 19 22 22 19 39 123 272 299 482 227 134 69 49 20 22 22 19 66 122 269 326 490 219 130 69 48 21 22 216 126 68 48 22 22 21 19 96 122 257 329 493 210 121 66 46 23 22 201 115 65 45 65 46 238 353 480 187 107 63 46 26 21 21 19 4 ,290 1,460 233 228 374 448 181 107 6? 44 26 21 21 17 280 500 228 380 422 173 102 63 44 29 21 21 17 232 226 391 418 171 97 63 44 30 23 21 17 172 240 403 423 163 96 61 44 31 22

PEAN 22.8 21.6 19.1 445 293 298 301 453 283 130 75.0 49.7

M1N 21 21 17 14 118 226 250 415 163 92 60 44 AC-FT 1,400 1,280 1,180 27 ,350 16,260 18,320 17,900 27,840 16,820 8 ,020 4,610 2,960

MIN 17 AC-FT 19,950

COMBINED DIS :HARGE, IN CUBIC FEET PER SECOND, OF MILL CREEK AND MILL CREEK POWER CANALS NOS. 1, 2, AND 3 NEAR YUCAIPA , CALIF., WATER YEAR OCTOBER 1969 TO SEPT -MBER 1970

DAY OCT JUN JUL AUG SEP

1 43 40 33 38 30 115 33 32 28 24 24 24 30 77 33 32 28 24 23 24 23 4 47 39 39 32 30 42 31 32 28 24 23 24 24 23 23 23 23 7 45 41 37 33 29 36 33 34 29 24 23 22 8 45 42 37 32 29 36 34 33 30 20 23 22 9 45 41 37 33 31 36 34 33 30 18 22 22 10 45 41 22 21

11 46 41 37 37 34 41 34 34 30 14 23 21 12 38 40 37 35 33 43 34 34 30 24 23 21 13 39 39 36 35 33

36

996 832 MEAN 42.9 36.9 36.0 33.6 34.2 44.1 32.7 32.1 27.7 22.6 24.8 21.6

MIN 32 28 33 30 29 33 30 29 24 11 22 20

NT It YR 1970 TOTAL 11,846 MEAN 32.5 MAX 115 MIN 11 AC-FT 23,500 SANTA ANA RIVER BASIN

11055500 PLUNGE CREEK NEAR EAST HIGHLANDS, CALIF. LOCATION.--Lat 34°07'06", long 117°08'27", in SWWsNEis sec.I, T.I S. , R. 3 W. , San Bernardino County, on left bank at mouth of canyon at crossing of North Fork ditch siphon, 1.8 miles northeast of East Highlands. DRAINAGE AREA.--16.9 sq mi. ords of creek and di sions March 1951 to Septem-

pper diversion; water-stage recorder d concrete-lined canal on middle diversion; water-stage sharp-crested weir on lower diversion Altitude of gage is 1,590 ft (from topographic map).

EXTREMES.-.-Maximums (discharge in cubic feet pe ond, gage, height, in feet). Annual maximum discharge (*) and peak discharges above base (130 cfs), water Creek only Combined Wtr yr Da e Time Discharge .H. Da e I scharge 1966 Mo . 22 965 2030 *4,200 .07 No . 22 1965 *4,200 De . 29 965 1900 1,090 .53 De . 29 1965 1,090 1967 De . 3 966 1100 413 .67 De . 3 1966 417 De . 6 966 1800 *4,770 .20 De . 6 1966 *4,770 Ja . 24 967 2200 812 .20 Ja . 24 1967 812 Ma . 13 967 2230 280 .45 Ma . 13 1967 280 Ap . 4 967 1800 162 .23 Ap 4 1967 162 Ap . 11 1967 1030 150 .38 . 11 1967 150 Ap . 22 1967 0300 162 .43 Ap . 22 1967 162 1968 . 20 1967 0500 158 .42 No . 20 1967 158 No . 30 1967 1700 178 .47 No . 30 1967 178 Ma . 8 1968 0800 *190 .50 Ma 8 1968 *191 1969 Ja . 21 1969 1000 733 .24 Jan. 21 1969 733 Ja . 25 1969 1030 *4,610 .96 Jan. 25 1969 *4,610 Fe 6 1969 - 500 Feb. 6 1969 500 Fe . 25 1969 0900 3,400 4.60 Feb. 25 1969 3,400 1970 Ma ' 1 1970 *100 Mar. 1 1970 100 Annual mi Creek only Combined Wtr yr Date Discharge Date Discharge 1966 Many days 0 Sept. 17-20, 1966 .30 1967 do. 0 Nov. 16, 1966 .30 1968 do. 0 Several days .70 1969 do 0 Oct. 27, 1968 .72 1970 do. 0 Sept. 17, 25, 1970 .87 Period of record: Maximum discharge (creek only), 5,340 cfs Mar. 2, 1938, on basis of slope-area measure­ ment of peak flow; no flow for part of each year. (Combined): Maximum discharge, 4,770 cfs Dec. 6, 1966; no flow Nov. 12, 1964, Sept. 29, 1965. REMARKS.--Records good except those for water year 1969, which are poor. No regulation above station. Diver­ sions for irrigation are made at sites 0.5, 1.0, and 2.5 miles above station. Water has been diverted above station for irrigation during entire period of record. Combined discharge of Plunge Creek and upper, middle, and lower diversions is given in tables herein (no flow in lower diversion since May 29, 1966). See schematic diagram of Santa Ana River basin elsewhere in this report. REVISIONS (WATER YEARS).--WSP 1635: 1924, 1926, 1935-36(M), 1943, 1944(M), 1945, 1946(M), 1947, 1950(M). WSP 1715: 1956-58(M). WSP 1928: Drainage area. SANTA ANA RIVER BASIN

11055500 PLUNGE CREEK NEAR EAST HIGHLANDS, CALIF.--CONTINUED

fl.O 7.5 6.0 7.5 4.0 7.2

1 0 25 11 13 .0 .10 2 0 24 10 12 .0 .10 3 0 23 9, 9.8 .1 0 4 0 23 9. 9.4 .1 0 5 0 22 8. 9.4 .90 0

6 .40 21 8. 9.4 1.2 0 7 33 18 8. 9.0 .60 .10 8 26 16 7. 8.4 .50 .10 9 5.3 14 6. 8.1 .50 .40 0 2.2 13 6. 8.1 .40 .10

1 1.2 12 6. 7.8 .40 .10 2 577 10 7. 7.5 .40 .10 3 250 9.2 7, 6.6 .10 0 4 150 8.4 6. 6.0 2.8 0 5 100 7.6 5. 6.0 4.2 0

6 60 7.0 6. 5.7 4.2 0 7 45 6.2 6. 5.7 1.4 0 g 40 5.8 6. 5.4 1.2 0 9 30 250 6. .80 0 0 20 150 11 .10 0 1 100 9. 0 TAL AN 0 44.7 27.8 13. 9.92 2.01 .047 X D 577 250 5( 25 5.7 .40 N 0 0 3.0 5. 5.4 0 0 -FT 124 2.8

NOTE. NO GAGE-HEIGHT RECORD OR STAGE-DISCHARGE RELATION INDEFINITE NOV. 23 TO JAN. 3.

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 DAY OCT NOV SEP

1 0 0 .10 6. 4.2 13 38 8.4 .10 .20 2 0 0 .20 6. 3.7 6 37 7.5 .10 .30 3 0 0 132 6. 4.0 5 37 8.7 .10 .60 4 0 0

11 0 .50 36 4. 10 7 32 8.4 .30 .10 12 0 .50 27 5. 27 2 27 8.4 .30 .10 13 0 .40 21 4. 112 2 24 .1 .30 0 14 0 .40 18 4. 105 9 23 .B '.30.30 0 15 0 .30 17 4. .8 39 8 21 .2 0

16 0 .30 17 3. .1 37 4 18 .9 .30 0 17 0 .20 17 2. .8 29 5 18 .9 .30 0 IB 0 .10 16 1. .5 25 9 17 .6 .20 0 19 0 0 15 B 0 .2 18 0 17 .0 .20 0 20 0 0 14 .10 .2 17 2 14 .4 .20 0

21 0 .10 13 .10 .9 15 9 12 .0 .60 .10 0 22 0 .10 12 12 .7 14 5 12 .4 .30 .10 0 23 0 .10 11 26 .7 13 3 12 .7 .30 .20 0 24 0 .10 10 139 .7 13 2 11 .0 .20 .30 .10 25 0 .10 9 .4 160 .4 13 2 11 .8 .20 .20 .20 26 0 .10 9 .0 37 .0 12 2 10 .6 .20 .20 .20 27 0 .10 8 .4 35 .7 12 2 10 .6 .20 .20 .10 28 0 .10 8 .1 34 .0 11 9 9.4 .4 .30 .10 .30 29 0 .10 7 .8 30 12 5 9.4 .4 .30 .10 .80 30 0 .10 7 .2 26 11 1 9.4 .1 .30 0 .40 31 0 7 .2 26 13

TOTAL 1.60 10.40 3,288 .10 612.30 298.7 599.4 1,220 670.2 184.1 41.70 5.70 5.00 MEAN .052 .35 106 19.8 10.7 19.3 40.7 21.6 6.14 1.35 .IB .17 MAX .80 MIN 0 0 .10 .10 1.7 3.4 13 9.4 2.1 .20 0 0 AC -FT 3.2 9.9

CAL YR 1966 TOTAL 4.04B.OO MEAN 11. 1 MAX 1,650 HIN 0 AC -FT 8,030 SANTA ANA RIVER BASIN

11055500 PLUNGE CREEK NEAR EAST HIGHLANDS, CALIF.--CONTINUED

1 .30 .20 14 5.4 4.0 1.4 .2 .20 .30 0 2 .30 .20 7.8 5.2 3.4 1.4 1 .20 .20 0 3 .20 .20 5.7 5.2 3.2 1.4 . .20 .10 C 4 .20 .20 4.7 4.7 3.2 1.4 . .20 .10 0 5 .20 .20 4.2 4.7 3.2 1.4 . .20 .10 0 6 .20 .20 4.0 4.4 2.8 2.0 . .20 .20 0 7 .20 .20 4.0 4.2 2.8 3.0 . .20 .20 0 B .20 .10 3.7 4.2 2.8 73 . .10 .20 0 9 .20 .1C 3.4 4.2 3.2 29 . .10 .10 0 10 .20 .10 3.4 4.2 2.8 17 .0 .10 .10 0 U .20 .10 3.2 4. 2.4 15 . 0 .10 .10 0 12 .20 .20 3.2 4. 2.4 14 . .10 0 0 13 .20 .10 3.2 4. 3.7 12 . .10 0 0 14 .20 .20 .0 4. 4.2 10 . .10 0 0 15 .20 .10 .2 4. 4.4 9.0 .90 .10 0 0 16 .20 .4 4. 5.0 8.4 .90 .10 0 0 17 .20 .7 4. 5.2 8.1 .80 .10 0 0 18 .20 I .7 4. 5.0 7.5 .80 .10 0 C 19 .20 214. 4.2 6.9 .80 .10 C .20 20 .20 4 8.4 3. 4.0 6.3 .80 .10 0 .20 21 .20 1 7.5 3. 4.0 5.7 .80 .10 C .40 22 .20 .6 7.5 3. 4.0 5.4 .70 .10 0 .40 21 .20 .4 8.4 3. 3.2 5.0 .60 .10 0 .30 25 .20 .8 9.4 2.0 2.6 4.4 .10 .20 0 .30 26 .20 .6 9.0 2.0 2.0 4.0 .10 .20 0 .20 27 .20 .4 8.1 5.2 2.0 3.0 .20 .20 0 .10 28 .20 .0 7.2 6.0 1.8 3.0 .20 .20 D 0 29 .20 .2 6.9 4.0 1.4 2.8 .20 .20 0 0

TOTAL 0 2.40 MAX 0 .40 MIN .20 C 3.0 2.0 1.4 1.4 .10 .10 0 0 0 0

2 0 0 .06 .18 40 25D 65 20 9.6 3.6 .8 .40 3 0 0 .06 .15 35 210 BO 21 9.6 3.6 .B .24 4 0 0 .08 .15 30 180 65 21 9.2 3.6 .7 .24 5 0 0 .08 .15 30 150 60 22 9.2 2.8 .B .24 6 0 0 .10 .12 180 140 56 22 8.7 3.6 .7 .40 7 0 0 .10 .OB 100 130 52 23 8.7 3.3 .7 .50 9 .71 0 .08 0 65 110 45 21 8.7 2.8 .5 .31 10 .48 0 .02 0 60 100 41 19 9.6 2.8 .4 .24 11 .22 0 0 .46 55 95 40 IB 10 2.5 .3 .17 13 .15 0 0 .31 50 B4 39 16 11 3.0 .1 .17 14 .12 0 0 32 50 80 39 15 B.7 3.0 .1 .24 15 .10 0 0 9.0 130 75 38 14 8.2 3.0 .D .16 16 .04 0 0 5.2 90 72 38 14 8.7 3.0 .0 .16 17 0 0 0 4.4 70 70 36 13 9.2 3.0 .90 .16 IB 0 0 0 4.2 107 68 34 13 B.2 3.3 .BO .16 19 0 0 0 11 107 64 32 12 7.8 3.3 .70 .16 20 0 0 0 137 107 64 31 12 7.5 3.3 .60 .16 21 0 0 0 206 133 64 30 U 7.5 3.3 .50 .15 22 0 0 0 1B8 109 4 2B 11 7.5 3.3 .40 .15 23 0 0 0 67 225 4 26 11 7.1 3.0 . .40 .15 24 0 0 0 366 942 4 25 11 7.1 2.8 .40 .15 25 0 0 .02 1.B40 1,720 4 24 10 7.5 2.B .40 .15 26 0 0 3.1 510 706 3 23 10 7.1 2.5 .65 .14 27 0 0 2.4 257 5*3 4 22 10 6.4 2.5 .65 .14 28 0 0 1.9 152 400 4 22 10 5.7 2.5 .31 .14 29 0 0 1.9 10B 64 21 10 5.0 2.5 .50 .14 30 0 .05 1.9 82 65 20 9.6 4.6 2.5 .31 .14

MEAN .074 MAX .71 .05 3.1 1,840 1,720 300 BO 23 11 4.1 2.3 .50 HIM 0 0 0 0 30 63 20 9.6 4.6 2.5 .31 .14

CAL YR 1968 TOTAL 568.49 MEAN 1.55 MAX 73 MIN 0 AC-FT 1,130

NOTE. NO GAGE HEIGHT RECORD FEB. 29 TO MAY 26. SANTA ANA RIVER BASIN

11055500 PLUNGE CREEK NEAR EAST HIGHLANDS, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1973 DAY OCT NOV

1 .15 .12 .1 .26 2.2 50 .6 .01 .04 0 0 .01 2 .15 .12 .1 .24 l.l 3B .8 .01 .04 0 0 .01 3 .14 .12 .1 .24 .06 30 .6 .01 .02 .02 0 .01 4 .14 .1C .1 .24 .07 25 .4 .01 .01 .06 0 .01 5 .14 .OB .1 .22 .07 21 .0 .01 0 .01 0 .01

6 .14 3.9 .0 .18 .07 IB 1.0 .01 0 0 0 .02 7 .14 21 .0 .16 .05 16 .22 .01 0 .02 0 .02 6 .14 7.3 .0 .14 .04 15 .12 .01 0 .03 0 .02 9 .14 6.8 .0 .12 3 13 .11 .01 c .02 0 .02 10 .14 6.6 .0 3.6 7 21 .10 .02 0 .02 0 .02 11 .14 6.6 .99 2.4 1 16 .05 .04 0 .02 0 .02 12 .14 6.1 .93 1.6 13 .04 .05 0 .01 0 .02 13 .14 5.5 .93 .72 12 .02 .02 0 0 0 .02 14 .13 5.5 .67 .60 12 .02 .01 .02 0 0 .02 15 .13 5.5 .87 .49 11 .02 0 .43 0 0 .02

16 .13 5.7 .77 2.0 8.7 .02 0 .46 0 0 .02 17 .13 5.5 .77 3.7 6.4 .02 .01 .46 0 0 .02 18 .13 5.5 .77 3.4 8.1 .02 .03 .46 0 0 .02 19 .13 5.5 .77 3.1 7.3 .02 0 .46 0 0 .02 20 .13 5.2 .77 3.1 7.0 .02 0 .20 0 0 .02

21 .13 4.8 .72 2.8 6.8 .02 0 0 0 0 .02 22 .13 5.2 .72 2.6 6.6 .02 0 0 0 0 .02 23 .13 5.7 .7? 2.6 5.9 .02 0 0 0 0 .02 24 .13 4.8 .72 2.5 5.7 .02 0 .02 0 0 .02 25 .12 4.6 .72 2.5 5.2 .01 0 .03 0 0 .01

26 .12 3.3 .64 2.5 1 5.2 .01 0 0 0 0 .01 27 .12 1.1 .49 2.5 1 -4.8 .01 0 .01 0 0 .01 26 .12 1.1 .43 2.4 IB 4.8 .01 0 0 0 0 .01 29 .12 1.1 .77 2.3 4.8 .01 .01 0 0 0 .01 30 .12 1.1 .82 2.3 5.0 .01 .01 0 0 .01 .01 31 .12 .29 2.2 5.9 .02 0 .01

MEAN .13 4.52 .84 1.74 5.65 13.3 .72 .010 .089 .007 .0006 .016 MAX .15 21 1.1 3.8 16 50 4.6 .05 .46 .06 .01 .02 MIN .12 .06 .29 .12 .03 4.6 .01 0 0 0 0 .01 1.0

NOTE, NO GAGE HEIGHT RECORD FEB. 28 TO MAR. 6.

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF PLUNGE CREEK AND DIVERSIONS NEAR EAST HIGHLANDS, CALIF.,

DAY OCT NOV nec SEP .40 .40 15 50 8.4 6.7 4.3 2.9 2.2 1.2 .60 .40 .40 .50 10 40 7.8 7.6 4.3 2.9 2.2 1.2 .70 .40 .40 .50 6.0 30 .40 .40 .40 6.0 25 .40 .40 .50 4.0 24 7.2 5.6 4.1 2.7 2.2 .90 .70 .40 .40 .40 3.6 19 25 5.2 4.1 2.7 2.2 .90 .70 .40 .40 .50 4.8 14 21 4.9 4.1 2.6 2.1 .90 .70 .40 .40 .50 5.6 13 17 4.7 4.1 3.3 2.3 1.0 .70 .40 .40 .50 11 13 15 4.6 4.2 3.3 2.5 1.0 .70 .40 .40 .50 35 12 14 4.0 3.4 3.4 2.3 .90 .70 .40 .40 .50 25 11 13 4.1 4.0 3.1 1.9 .90 .70 .40 .40 .50 24 10 12 4.0 4.2 2.9 1.7 .90 .70 .40 .40 .50 24 9.4 9.8 3.9 3.9 2.5 1.5 .90 .70 .40 .40 .60 24 .40 .60 22 8.7 9.4 4.0 3.5 2.4 1.4 .80 .60 .40 .40 1.0 21 8.7 9.4 4.4 3.4 2.3 1.5 .70 .60 .40 .40 33 18 8.7 9.0 4.2 3.8 2.3 1.4 .70 .60 .30 .40 26 16 8.5 6.4 4.1 3.6 2.2 1.3 .70 .50 .30 .40 5.3 14 8.6 8.1 4.0 3.7 2.2 1.3 .70 .50 .30 .50 2.2 15 8.2 6.1 3.9 4.0 2.2 1.3 .80 .50 .30

.50 1.2 14 B.8 7.8 3.9 3.8 2.2 1.2 .70 .50 .40 .50 578 12 9.7 7.5 4.0 3.8 2.2 1.3 .60 .50 .40 .50 254 .40 .50 152 8.4 8.2 7.3 7.0 3.4 2.1 1.4 .80 .50 .40 .50 1D1 .40

.40 60 7.0 7.0 7.0 6.7 3.4 2.3 1.4 .70 .50 .40 .40 45 6.2 6.9 7.0 3.8 3.2 2.3 1.3 .70 .50 .40 .40 40 5.B .40 .40 30 250 6.9 _____ 3.6 3.4 2.3 1.1 .60 .40 .40 .40 20 150 11 ______4.5 3.2 2.2 1.1 .BO .40 .40 31 .40 4.5 2.2 .50 .40

TOTAL 13.00 1.356.10 676.2 423.0 284.9 14B.8 113.5 76.0 50.0 25.70 16.30 11.60 MEAN .42 45.2 2B.3 13.6 10.2 4. BO 3.78 2.52 1.67 .63 .59 .39 MAX .50 578 250 50 25 7.6 4.3 3.4 2.5 1.2 .BO .40 MIN .40 .40 3.6 6.9 6.6 3.4 3.2 2.1 1.1 .50 .40 .30 AC-FT 225 155 99 51 36 23 SANTA ANA RIVER BASIN

1105S500 PLUNGE CREEK NEAR EAST HIGHLANDS, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF PLUNGE CREEK AND DI VERSIONS NEAR EAST HIGHLANDS , CALIF WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

MAY JUN JUL AUG SEP 1 .40 .50 .90 6. 21 8-. 1 14 38 13 5.6 3.2 3.1 Z .40 .50 1.0 6. 19 7.6 17 37 12 5.6 3.1 3.4 3 .40 .40 13 6. 17 7.7 16 37 13 6.1 3.C 4.1 4 .50 .50 .7 6. 17 10 44 35 12 7.0 2.8 3.2 5 .90 .60 6G 5. 16 8.4 31 31 12 6.1 2.8 2.6

6 .90 .70 1,6 5. 16 7. 21 30 12 6.6 2.8 2.5 7 .50 3.0 3 5. 15 8. 24 30 12 6.9 2.7 2.4 8 .50 3.6 1 5. 14 7. 21 30 12 7.0 2.8 2.3 9 .60 .70 5. 15 7. 20 31 12 6.9 2.6 2.1 1C .70 .60 4. 14 7. 20 44 12 6.7 2.5 2.2

11 .70 .50 4. 14 11 68 32 12 6.6 2.5 2.1 12 .70 .50 5. 14 28 52 29 12 6.5 2.5 2.1 13 .60 .40 4. 14 112 42 26 13 6.6 2.4 2.0 14 .60 .60 4. 13 105 39 25 11 5.9 2.2 2.0 15 .60 .40 4. 12 39 38 23 11 5.5 2.2 1.9 16 .60 .30 3. 11 37 34 20 10 5.3 2.2 1.9 17 .60 .60 3. 11 29 35 20 10 4.5 2.2 1.8 18 .60 .90 3. 11 25 39 19 9.8 4.3 2.2 2.0 19 .60 .80 2. 10 18 50 20 .50 .80 2. 9.9 IT 52 17 8. 4.0 2.3 1.9 21 .60 .90 2.7 9.5 15 59 16 7. 3.7 2.3 1.9 22 .60 .90 14 9.5 14 95 16 7. 3.7 2.3 1.9 23 .60 .90 26 9.4 13 63 16 6. 3.7 2.4 1.9 24 .60 .90 10 139 9.3 14 52 15 6. 3.6 2.7 2.2 25 .50 .90 9.4 160 9.1 13 52 15 6. 3.6 2.8 2.4 26 .50 .80 9.0 37 8.6 12 52 14 6. 3.5 2.4 2.2 27 .50 .90 8.4 35 8.2 12 52 14 6. 3.5 2.2 2.0 28 .60 .90 8.1 34 8.1 11 49 14 6. 3.6 2.0 3.2 29 .50 .90 7.8 14 6. 3.5 2.0 3.7 30 .50 .90 7.2 14 5. 3.5 1.9 2.5

71.6 MEAN .58 .86 106 20.2 12.7 20.7 41.2 23.7 9.8 5.07 2.4 2.39 7.0 3. 4.1 M1N .40 .30 .90 2.7 8.1 7.2 14 14 5. 3.5 1. 1.8 > 312 15 142 8,900

COMBINED DISCHARGE, IN CUBIC- FEET PER SECOND, OF PLUNGE CREEK AND DIVERSIONS NEAR EAST HIGHLANDS , CALIF WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

DAY OCT NOV OEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 2.1 1.4 14 5.4 4.0 4.4 5.0 3.2 2.5 1.4 1.0 .90 1.0 .90 3 1.9 1.4 5.7 .90 1.1 .90 1.0 5 1.9 1.5 4.2 1.1 .90 .90 .90 .70 7 1.8 1.5 4.0 1.0 .70 8 1.8 1.4 3.7 4.2 4. 74 4.1 3.3 3.1 1.6 .90 .70 9 1.7 1.4 3.4 4.2 4. 29 3.8 3.3 3.0 1.1 .90 .70 10 1.7 1.3 3.4 4.2 4. 17 3.6 3.3 2.6 .90 .90 .70 11 1.7 1.3 3.2 4.4 4. 15 3.6 3.4 2.3 1.1 .80 .70 12 1.6 1.4 3.2 4.2 4. 14 3.5 4.6 2.1 1.1 .80 .70 13 1.6 1.3 3.2 4.0 6. 12 3.5 4.9 2.1 1.1 .90 .70 14 1.6 1.4 3.0 4.2 6. 10 3.5 4.0 2.0 1.1 .0 .70 15 1.6 1.4 3.2 4.0 5. 9.0 3.4 3.6 1.9 1.1 .0 .90 16 1.6 1.6 3.4 4.2 5. 8.4 3.6 3.4 l.B 1.1 .0 .90 3.2 1.8 1.0 .1 .70 1.0 .1 .70 19 1.6 31 12 4.0 4.8 6.9 3.6 3.2 1.5 .90 .1 .90 20 1.4 47 8.4 .1 1.0 21 1.5 17 7.5 3.2 1.5 .90 1.1 1.2

26 1.5 2.6 9.0 3.7 3.8 4.8 3.4 2.9 1.4 .80 .90 .80 27 1.5 2.4 8.1 6.2 4.7 4.4 3.5 2.7 1.5 .90 .90 .80 l.l .90 .70 1.5 .70 .70 30 1.5 37 6.3 3.8 4.8 3.2 2.6 1.5 1.1 .80 .80 31 1.5 5.4

3.31 1.96 1.07 .94 .84 MAX 2.1 47 14 6.4 6.6 74 15 4.9 3.1 1.6 1.1 1.2 2.5 1.4 .80 .70 .70 AC-FT 102 377 383 66 58 50 180 740 SANTA ANA RIVER BASIN

11055500 PLUNGE CREEK NEAR EAST HIGHLANDS, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF PLUNGE CREEK AND DIVERSIONS NEAR EAST HIGHLANDS, CALIF. WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

1 .83 .84 .0 55 300 65 23 13 8 6.3 4.2 2 .84 .8 .7 43 250 65 23 13 5.8 3.9 3 .88 .8 .6 35 210 80 24 13 5. 3.7 4 .87 .8 .6 30 180 65 24 13 5. 3.7 5 .83 .8 .6 30 ISO 60 25 13 5 - 3.7

6 .80 .8 .6 180 140 56 24 12 5 . 4.0 7 .83 .8 .6 IOC 130 52 24 12 5. 4.1 8 .94 .8 .6 75 120 48 23 12 5. 4.1 9 1.3 .8 .6 65 110 45 21 12 5. 3.8 10 1.2 .8 .5 60 100 41 19 13 5 - 3.7 11 1.1 .8 .9 55 95 40 8 14 5. 3.7 12 1.0 .8 .8 52 90 40 8 15 5. 3.7 13 .97 .8 .5 50 84 39 7 15 5. 2.8 14 .96 .8 8 3 50 80 39 7 12 4. 3.3 15 .97 1.2 .0 130 75 38 6 12 * 4.1 16 .90 .2 90 72 38 16 12 4. 4-2. 17 .84 .4 70 0 36 15 13 4. 4.2 18 .81 .2 107 8 34 15 12 4 . 4.0 19 .79 1 107 4 32 15 11 4. 4.0 20 .79 13 107 4 31 15 11 * 4.1

21 .79 206 133 4 30 14 11 4 . 4.1 22 .76 188 109 4 30 14 11 4. 4.1 23 .73 8 67 225 4 29 14 11 4. 3.8 24 .73 9 366 942 4 28 14 11 4. 3.6 4. 3.6

26 .73 0 510 706 3 26 13 11 ' 4. 3.5 27 .72 1. 257 543 4 25 14 10 4. 3.4 28 .73 1. 152 400 4 25 14 9.4 4. 3.4 29 .75 1. 108 4 24 14 8.6 4. 3.3 30 .85 1. 82 5 23 13 8.3 4. 3.3 66 4.

113.1 MEAN .86 .97 61 131 224 102 40.4 17.5 11. a 7. 4.8 3.77 MAX 1.3 1.6 5.9 1,840 1,720 300 80 25 15 8 4* 4.2 2.8

2,080

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF PLUNGE CREEK AND DIVERSIONS NEAR EAST HIGHLANDS, CALIF.,

1 3.2 3.4 4.0 3. 2.6 0 4.8 4.0 2. 1.4 .0 1.0 2 3.4 3.4 3.7 3. 2.9 8 4.8 4.1 2. 1.4 .0 1.0 3 3.5 3.4 3.7 3. 2.8 0 4.6 4.1 2. 1.4 .0 1.1 4 3.4 3.4 3.7 3. 2.8 5 4.3 3.5 2. 1.4 .0 1.1

6 3.2 8.0 3.7 3. 2.7 8 3.9 3.6 2. 1.2 .0 .94 7 3.2 23 3.6 3. 2.6 % 4.2 3.6 2. 1.3 .0 .94 8 3.2 7.3 3.7 3. 2.6 5 4.1 3.6 2. 1.3 .0 .94 9 3.2 6.8 3.8 3. 2.6 3 3.9 3.6 2. 1.3 .0 .94 10 3.4 6.6 3.9 7. 8.8 1 3.7 3.7 2. 1.4 .0 .94 11 3.5 6.6 3.8 5. 17 6 3.4 3.4 2. 1.3 '1.0 .90 2 3.4 6.1 3.6 5. 9.2 3 3.4 3.4 2. 1.4 .9 .88 3 3.6 5.5 3.6 4. 9.0 2 3.5 3.3 2. 1.2 .9 .93 4 3.5 5.5 3.6 4. 9.2 2 4.0 3.0 2. T.2 .9 .96 5 3.6 5.5 3.6 4. 9.0 1 4.0 2.9 2. 1-2 .9 .93 6 3.7 5.7 3.4 4. 8.4 8.7 4.0 2.8 2.8 1.2 .9 .90 7 3.8 5.5 3.4 3. 6.6 8.4 4.1 2,6 2. 1.2 .9 .87 8 3.8 > 1.3 .9 .89 0 3.8 .94

1 3.8 4.8 3.4 3.0 5.9 6.8 4.1 2.7 1.7 1.2 .9 .96 2 2.8 1.8 1.2 .9 .94 3 .93 4 3.8 4.B 3.4 2.9 6.1 5.7 4.1 2.7 1.6 1.2 .9 .93

6 3.8 8 3.5 4.0 3.7 2.8 18 4.8 4.3 3.2 1.9 1.0 1.1 .89 0 3.4 4.1 4.1 2.7 5.0 4.2 2.7 1.5 1.0 1.0 .92

TAL > 38.3 30.85 28.16 AN 3.14 2.10 1.24 1.00 .94 X 4.0 23 4.1 7.2 18 90 4.8 4.1 2.8 1.4 1.2 1.1 -FT 218 340 223 223 358 816 244 193 125 76 61 56

AL YR 1969 TOTAL 16,47 8. BO MEAN 45.1 MAX 1,840 MIN 1.5 AC-FT 32,690 2.930 SANTA ANA RIVER BASIN

11055800 CITY CREEK NEAR HIGHLAND, CALIF.

LOCAlION.--Lat 34°08'38", long 117°11'16", in SEHSWWH sec.27, T.I N. , R. 3 W. , San Bern County, on right bank 0.6 mile upstream from Highland Avenue and 1.5 miles northeast of Highland. DRAINAGE AREA.--19.6 sq mi.

1970.

GAGE. --Water-stage recorder. Altitude of ga ge is 1,580 ft (from topographic map). Prior to Mar. 1, 1939, at site 0.2 mile downstream at different daturn.

AVERAGE DISCHARGE. --51 years (creek only), 9 .03 cfs (6,540 acre-ft per year); median of yearly mean discharges, 5.2 cfs (3,800 acre-ft per year). 46 yea rs (combined creek and canal), 10.8 cfs (7,820 acre-ft per year); median of yearly mean discharges, 6.5 cfs (4,700 acre-ft per year). EXTREMES. --Maximums and minimums (discharge in cubic feet per second, gage height in feet), Annual maximum discharge (*) and peak discharges above base (150 cfs), water years 1966-70

Creek only Combined Wtr yr Date Time Discharge G.H. Date Dis charge G.H. 1966 Nov. 22 1965 2000 *1,310 5.86 Nov. 22, 1965 1,310 - Dec. 29 1965 1915 1,120 5.59 Dec. 29, 1965 1,130 1967 Dec. 6 1966 1815 *3,080 7.23 Dec. 6, 1966 *3,080 - Jan. 24 1967 2115 327 3.80 Jan. 24, 1967 327 - Apr. 22 1967 0330 235 3.62 Apr. 22, 1967 244 - 1968 Nov. 20 1967 0315 *217 3.12 Nov. 20, 1967 *217 - 1969 Jan. 21 1969 0900 1,'290 4.43 Jan. 21, 1969 1,290 - Jan. 25 1969 1600 3,240 8.83 Jan. 25, 1969 3,240 - Feb. 6 1969 . 350 - Feb. 6, 1969 350 Feb. 25 1969 1400 *7,000 9.39 Feb. 25, 1969 *7,000 - Apr. 3 1969 0245 175 3.35 Apr. 3, 1969 175 - 1970 Feb. 28 1970 1800 *205 4.24 Feb. 28, 1970 *208 Ann 0

Creek only C ombined Wtr yr Date Dis charge Date Discharge 1966 Many days 0 Sept. 23 24 , 1966 .20 1967 Oct. 15-26, 1 966 0 Oct. 23 1966 .80 1968 Sept. 24-28, 1 968 .05 Sept. 11 1968 .61 1969 Oct. 1, 2, 6 , 1968 .06 Oct. 10 1968 .92 1970 Aug. 8, 9, 1970 .05 Sept. 26 27, 1970 1.4 1 Pe riod of record: Maximum discharge ( creek only) , 7,000 cfs Feb. 25, 1969 (gage he ight, 9.39 ft) , fro m g curve extende * 1S MaximumP t at gage 3 . 83 ft ; n o flow fo sever al months in so me years. (Combined) discharf e, 7,000 cfs Feb. 25, 1969 ; no flow at times in so me years. REMARKS . erein.

REVISIONS (WATER YEARS) .--WSP 1635: 1920(M) , 1923(M), 1937 (M) 1939(M) , 1946. WSP 1928: Drainage area.

DAY' OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

i 0 .10 17 192 14 8.1 1.8 .40 .20 .20 .20 0 2 0 .10 14 197 14 6.8 1.8 .40 .30 .20 .20 0 3 0 .10 12 98 15 6.1 1. .40 .30 .20 .20 0 4 0 .10 11 68 15 5.9 1. .40 .30 .20 .20 0 5 0 .10 11 38 16 5.7 1. .40 .30 .10 .20 0 6 0 .10 11 32 30 5.7 2. .40 .20 0 .20 .10 7 0 .10 11 30 34 5.7 1. .30 .30 0 .20 0 8 .10 .10 10 27 28 5.8 . 0 .40 .30 0 .20 0 9 .10 .10 18 25 25 5.9 . 0 .40 .30 0 .20 0 10 .10 .10 34 23 22 5.8 .60 .40 .30 0 .30 0 11 .10 .10 19 21 18 6.0 .60 .30 .20 0 .30 0 12 0 .10 20 20 15 6.1 .60 3.8 .20 0 .30 .10 13 .10 .10 20 19 14 6.1 .60 4.7 .20 .10 .30 0 14 .10 .10 19 17 14 5.9 .60 4.5 .20 .20 .30 0 15 .10 .40 18 16 13 5.9 .50 4.6 .20 .20 .20 0 16 .10 4.9 16 16 12 5.8 .50 4.6 .20 .20 .10 0 17 .10 39 14 .14 12 5.7 .60 4.2 .10 .10 .10 0 18 0 32 13 14 12 5.8 .70 4.0 .10 .10 .10 0 19 0 7.2 12 15 12 5.9 1.2 3.9 .20 .10 .10 .10 20 0 3.9 12 14 12 5.9 .70 1.4 .20 .10 .10 .10 21 0 2.8 11 13 11 5.8 .50 .50 .30 .10 .10 0 22 0 322 11 13 11 5.7 .50 .40 .30 .10 .1C 0 23 0 409 10 13 10 4.2 .50 .40 .30 .10 .10 0 24 .10 144 9.9 10 11 2.0 2.2 .40 .20 .10 .10 0 25 .10 137 9.5 8.8 11 1.3 3.7 .40 .20 .10 .10 0 26 .10 82 9.2 9.2 11 1.6 1.7 .30 .30 .10 .10 .10 27 .10 39 8.7 11 10 1.7 .60 .30 .30 .10 .10 .10 28 .10 32 7.8 8.6 9.9 1.8 .50 .30 .20 .10 .10 .10 29 .10 25 276 10 1.8 .50 .20 .20 .20 .10 .10 .20' 30 .10 20 210 20 1.9 .50 .20 .20 .10 .10 31 .10 158 15 1.8 ...... 20 ...... 20 0 .....

MEAN .055 43.4 33.3 33.1 15.4 4.85 1.08 1.40 .24 .11 .16 .030 MAX .20 .30 .10 MIN 0 .10 7.8 8.6 9.9 1.3 .50 .20 .10 0 0 0 6.7 9.9 1.8 SANTA ANA RIVER BASIN

110SS800 CITY CREEK NEAR HIGHLAND, CALIF. - -CONTINUED DISCHARGEi IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 .10 .10 .10 10 22 5.4 23 57 22 12 .C 2 .10 .10 .10 10 21 5.4 29 53 21 11 .3 3 .10 .10 66 9. 20 5.1 22 50 19 11 .0 4 .10 .10 16 9. la 6.2 35 47 19 11 .0 5 .60 .10 5C7 9. 17 5.4 34 47 19 12 .9 6 .70 .20 1,290 9. 16 5.4 26 45 19 11 .a 7 .10 4.2 3PO a. 16 5.2 29 43 a 11 .a a .10 4.2 142 8. 15 4.9 31 40 a ll .9 9 .10 4.1 66 7. 15 4.9 28 42 8 10 .a 10 1.0 3.7 43 7, 14 7.2 25 48 8 10 .5 11 .60 3.5 33 7 f 13 12 58 40 8 1 .4 12 .10 3.4 29 7 B 12 26 50 38 8 .4 13 .10 3.4 25 7. 12 73 47 35 20 .2 14 .10 .10 22 7. 12 70 43 34 17 .0 15 0 .10 19 7 - 11 40 44 32 16 .9 . 16 0 .10 17 7. 11 31 42 31 16 .8 17 0 .10 15 6. 8.1 27 40 30 16 .8 18 0 .1C 14 6. 5.7 25 46 30 16 .8 19 0 .10 13 6. 5.3 24 48 29 15 .a 20 0 .1C 13 6. 4.7 23 43 27 15 .a 21 0 .1C 12 6.^ 4.5 22 ao 26 14 .a 22 0 .10 12 26 4.1 22 140 25 14 . . 23 0 .10 11 41 2.2 16 96 25 14 . . 24 0 .1C 12 92 2.6 13 as 25 13 . . 25 0 .10 11 120 4.1 12 77 24 13 26 0 .1C 11 53 6.9 12 76 24 13 . 27 .10 .10 11 30 6.7 12 72 24 13 . . 28 .10 .1C 11 25 5.5 12 68 24 12 29 .10 .1C 11 23 13 62 24 12 * 30 .10 .10 11 22 12 60 23 12 . 31 .10 11 23 19 24 488 22 4 . MEAN .14 .96 89.5 20.2 10.9 18.4 52.0 34.4 16.3 7 2 1 14 MAX 1.0 4.2 1.790 12C 22 73 140 57 22 . . MIN 0 .10 .10 6.<; 2.2 4.9 22 23 12 2,110 968 V 1 3 8

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 NOV DEC JAN FEB MAR APR MAY JUN JUL

.3 16 B 7.5 2.5 .9 7 .21 .10 .2 11 8 7.6 2.5 1C B .20 .10 .3 9.6 8 7.5 2.5 .8 . 9 .17 .10 .3 a. 6 a 7.2 2.3 4 . .17 .11 .4 8.3 8 7.1 2.4 . 2 .16 .11

.17 .11 1.1 2.4 6.9 2.7 .9 .19 .11 .91 2.3 6.9 44 .8 .19 .11 .75 2.1 7.3 15 .0 , .17 .10 .72 1.9 7.2 11 . 5 . 9 .16 .10

.69 1.9 7.1 9.9 .2 . 6 .16 .10 .69 1.9 6.9 9.1 .4 . 5 .28 .10 .66 2.1 8. 9 9.0 .5 .41 .32 .10 .65 2.1 a. 9 a. 6 .4 .39 .14 .11 .68 2.1 8.1 a.i .3 .36 .14 .12

.69 3.8 7.8 7.7 .9 .36 .13 .12 .69 6.S 7.8 7.6 .a .57 .13 .12 .69 12 7.7 7.3 .9 .49 .12 .12 11 13 7.4 6.2 .9 .30 .12 .12 63 11 7.2 4.7 .1 .25 .12 .12

19 10 7.2 4.6 .3 .24 .12 .12 13 10 7.1 4.5 .0 .23 .13 .12 9.8 11 5.3 4.7 .a .24 .10 .11 a. a 12 3.4 4.8 .9 .26 .10 .10 a.i 12 3.1 4.9 .8 .26 .10 .10 7.8 12 2.9 4.8 .a .26 .12 .10 7.5 11 2.7 4.8 .9 .25 .11 .10 9.2 10 2.5 4.7 .6 .25 .12 .10 a. s 9. 8 2.6 4.6 .2 .26 .11 .10 27 9.3 4.5 .7 .26 .10 .10 31 .10 .10

TOTAL 209.52 240.3 22 186.7 216.7 lit .a s 17.93 4.66 3.33 MEAN .60 .15 .11 MAX 63 16 8. 9 44 10 1.3 .32 .12 MIN .65 1.9 2.5 2.3 .7 .23 .10 .10 AC-FT 416 9.2 6.6

CAL YR 1967 TOTAL 5,436.82 MEAN 14.9 MAX 140 MIN .65 SANTA ANA RIVER BASIN

11055800 CITY CREEK NEAR HIGHLAND, CALIF.--CONTINUED IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 196B TO SEPTEMBER

1 .36 .17 .31 .0 85 886 86 28 16 .7 z .06 .17 .31 .9 78 620 75 28 16 .7 ^ .8 3 .OB .17 .30 .8 72 445 104 28 15 .8 4 .OB .17 .29 .7 68 330 79 31 15 . .8 5 .C7 .17 .28 .6 65 248 61 30 14 .7 .t .9 6 .06 .17 .27 .6 160 233 82 36 14 .0 . .8 7 .CB . .9 B .06 .17 .26 12 .2 .( 1.4 9 .OB .17 .26 .6 74 1B2 59 27 12 5 . 1.0 10 t .7

11 .CB .17 13 .7 f . ' 12 .10 .IB .26 .7 60 155 51 25 11 .3 13 .10 .19 .26 .9 58 148 50 25 11 14 .10 .19 .26 2 54 136 49 24 11 .5 15 .10 1.3 10 .2 1. 16 11 .6 17 .10 1.1 .24 .5 58 134 45 22 11 IB .10 1.1 .5 19 123 21 11 .0 23 .10 .96 1.7 12 82 104 41 21 11

21 .13 .75 2.^ 30 I 71 118 39 20 12 .3 22 .13 .59 .52 30 ? 64 105 36 20 11 .9 23 .13 .47 .52 4 .7 2* .13 .4 25 .1* 19 11 .2

26 28 19 11 .0 1. J 27 19 11 .3 . 37 23 .14 18 10 .0 . 35 29 .14 .33 3.2 16 91 29 18 .5 . 34 30 .17 .32 3.1 12 ) ______91 28 17 .1 . 34 31 .17 2.5 9 90 17 .B . 35

MEAN .11 .46 1.08 192 451 193 51.1 23.7 11. 4.7B 2.26 1.2 MAX .17 1.5 5.9 2,070 3,360 886 104 36 1 7.0 9.8 2. MIN .06 .17 .23 1.6 52 90 28

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

AUG SEP

I .97 .78 5. .69 4.2 64 2.1 .8 .85 .62 .11 .13 2 1.0 .76 5. .66 4.2 62 1.9 .7 .77 .60 .11 .14 3 1.3 .79 5. .65 4.1 25 1.8 .6 .77 .66 .10 .13 4 1.1 .BO 5. .68 4.1 21 1.7 .6 .81 .66 .10 .13 5 1.0 .32 5. .69 4.2 37 1.7 .5 .62 .99 .10 .14 6 .94 1 5. .64 4.1 22 1.6 .7 .87 .59 .09 .15 7 .93 2 5. .67 4.0 17 1.7 .8 .85 .20 .06 .15 8 .91 .3 4. .68 4.? 15 1.8 .B .90 .20 .05 .14 9 .83 .4 1. .68 4.4 13 1.7 .6 .20 .05 .13 10 .90 .7 1. 5.4 21 18 1.6 9 .20 .07 .13 11 .85 .5 9 2.2 20 13 1.6 .9 .20 .07 .13 12 .90 »7 7 l.B 9.1 11 1.7 .9 .20 .07 .14 13 .90 .0 . 1 1.4 7.6 10 1.7 .8 . .20 .09 .15 14 .95 .9 1 1.3 7.1 9.8 1.3 .7 . .19 .11 .18 15 1.1 .1 33 1.3 6.5 9.0 1.8 .5 .16 .11 .20 16 1.1 .0 34 4.0 6.2 8. 1.9 .6 .15 .11 .20 17 1.2 .3 39 6.4 6.0 8. 2.0 .5 .15 .12 .18 18 1.4 .9 >4 5.5 5.8 7. 2.0 5 . .14 .13 .16 19 1.3 .8 J7 5.3 5.6 5. 1.9 .5 . 1 .14 .13 .16 20 .96 .B 1. 5.2 5.6 2. 1.8 .8 5 .14 .13 .18 21 .97 3 .15 .13 .24 22 l.l .9 1.2 5.0 5.5 2. 3.2 .5 3 .15 .13 .22 23 1.1 .3 1.1 4.9 5.7 2. 2.3 .5 2 .14 .13 .22 24 1.0 2 .14 .12 .21 25 1.1 .9 1. 4.7 5.6 1. 1.8 .37 6 .14 .11 .23

26 .99 .9 1.1 4.5 5.6 3. 1.8 .96 3 .14 .IB .14 27 .94 .8 1. 4.5 3.8 5. 2.8 .97 1 .13 .20 .15 28 .92 .1 92 4.5 42 2. 2.3 1.1 2 .13 .18 .13 29 .89 .3 >B 4.4 2. 2.2 1.1 6 .11 .17 .11 30 .87 .5 .69 4.4 2.0 1.0 9 .11 .15 .17 3. .92 .11 .13 3.54 4.37 MEAN 1.01 5.55 2.10 3.13 7.76 13. 1.96 1.79 .90 .26 .11 .16 MAX 1.4 24 5 6 6.4 42 6 3.2 2.8 1.4 .99 .20 .24 MIN .79 .76 .68 .64 3.B 1. 1.6 .87 .61 .11 .05 .11 7.0 9.7 SANTA ANA RIVER BASIN

11055800 CITY CREEK NEAR HIGHLANDS, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND OF CITY CREEK AND CITY CREEK WATER CO.,'S CANAL

1 .40 .70 17 192 14 14 8.1 6.8 5.0 .60 2 .40 .70 14 197 14 15 8.3 6. 5.1 2! .3 .60 3 .40 .80 12 9f 15 14 8.2 6. 4.9 2. .3 .60 4 .40 .80 11 6E 15 13 8.1 7. 4.7 2. .2 .60 5 .40 .80 11 38 16 13 7.6 7. 4.5 1. .1 .60

6 .40 .80 11 32 30 13 7.4 7. 4.1 1. .1 .60 7 .40 .90 11 3C 34 12 7.6 7. 3.9 1. .0 ,6J 8 .60 .1 10 27 28 13 7.9 8. 3.8 1. .0 .60 9 .70 .1 18 25 25 12 8.2 8. 3.7 1. .90 .60 10 .80 .2 34 23 22 12 8.2 8. 3.6 1. .90 .60

11 .70 .2 19 21 21 2 8.2 8. 3.4 1. .90 .60 12 .50 .2 20 2C 20 2 8.2 5. 3.2 1. .80 .80 13 .60 .3 20 1? 19 2 7.8 4. 3.2 1. .60 .70 14 .80 .8 19 17 19 2 7.5 4. 3.1 1. .80 .60 15 1.1 .5 18 16 18 2 7.3 4. 3.1 1. .70 .60

16 1.1 .4 16 16 16 11 7.3 4. 3.4 1. .70 .60 17 1.0 4 14 14 16 11 8.5 4. 3.2 I. .70 .70 18 .90 3 13 14 16 11 10 4. 2.9 1. .70 .80 19 .80 .2 12 15 16 11 11 3. 3.0 1. .70 1.1 20 .60 .9 12 14 16 10 9.6 5. 2.9 1. .70 .90

21 .50 .9 11 13 15 10 9.0 5. 2.6 1. .70 .40 22 .50 32 11 13 15 10 8.8 5. 3.0 1. .70 .40 23 .50 40 10 13 14 1 8.1 5. 3.1 1. .60 .20 24 .60 14 9.9 12 15 6.9 5. 2.9 1. .60 .20 25 .60 13 9.5 12 14 7.1 4. 2.8 1. .60 .40

26 .60 8 9.2 12 14 7.2 5. 2.9 1. .60 .60 27 .60 3 8.7 1 13 7.3 4. 2.7 1. .60 .70 28 .60 3 7.8 10 -13 8. 7.3 4. 2.4 1. .60 .70 7.5 5. 2.3 1. .60 1.1 30 .60 2 212 21 8. 7.3 5. 2.3 1.6 5. 1. .60

241.5 179. 101.9 48. 25.50 19.70 MEAN .63 44.1 33.5 33.5 18.0 11. 8.05 5.7 3.40 1.5 .82 .66 MAX 1.1 409 280 197 34 1 11 8. 5.1 2. 1.4 1.6 MIN .40 .70 7.8 10 13 8. 6.9 3. 2.3 1. .60 .20 35 202 9 51 39

CAL VR 1965 TOTAL 3,820.70 MEAN 10.5 MAX 409 MIN 0 AC-FT 7 ,580 ,690

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND OF CITY CREEK AND CITY CREEK WATER CO.,'S CANAL NEAR HIGHLAND, CALIF., WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

DAV OCT NOV DEC JAN FEB MAR SEP

1 .7 2.0 3.0 10 22 11 24 60 26 14 8.9 7.1 2 .8 1.7 3.2 '10 21 11 31 56 24 13 9.1 8.4 3 . 2.0 71 9. 2C 12 27 53 24 13 8.6 8.0 4 . 2.4 16 9. 18 14 43 50 24 13 B.5 7.0 5 . 2.8 509 9. 17 13 43 48 24 14 8.2 6.2

6 . 3.8 1,290 9. 16 11 34 45 24 13 8.3 5.7 7 . 8.5 320 8. 16 10 34 43 23 13 8.6 5.5 8 . 5.0 142 8. 15 10 33 41 23 13 8.9 5.2 9 . 4.5 66 7. 15 9.9 30 45 23 12 8.6 5.1 10 . 4.0 43 7. 14 10 28 51 23 12 7.9 5.1

11 . 3.8 33 7. 13 13 60 43 23 12 7.4 5.0 12 . 3.6 29 7. 12 27 52 41 23 11 7.3 4.9 13 . 3.6 25 7. 12 74 9 38 25 12 7.3 5.1 14 . 3.6 22 7. 12 71 7 37 21 12 7.0 4.8 15 . 2.9 19 7. 11 41 7 34 20 12 7.2 4.5

16 . 2.7 17 7. 11 32 4 33 20 12 7.2 4.6 17 . 2.8 15 6. 11 28 2 32, 20 11 7.0 4.7 IB . 2.6 14 6. 11 26 7 32 20 11 6.8 5.5 19 . 2.5 13 6. 11 25 50 31 19 11 6.8 5.8 20 . 2.5 13 6. 11 24 45 29 16 10 6.6 5.3 21 . 2.8 12 6.9 11 23 84 28 17 10 6.3 5.1 22 . 2.8 12 26 11 23 146 27 17 10 6.1 5.7 23 .0 3.0 11 41 11 20 100 27 17 10 6.5 5.4 24 . 2.8 12 92 11 19 B8 27 16 10 6.5 5.6 25 . 2.8 11 120 11 18

26 . 2.9 11 53 11 18 79 26 16 9.5 5.5 5.3 27 . 2.7 11 30 11 18 75 26 16 9.4 5.1 5.2 28 . 2.7 11 25 11 IB 72 26 15 9.4 4.8 7.2 29 . 3.2 11 23 20 66 27 15 9.3 4.4 6.7 30 . 3.0 11 22 19 64 26 14 9.0 4.6 6.0 31 . 11 23 9.0 5.7

B.4 MIN .BO 1.7 3.0 6.9 11 9.9 24 26 ' 14 9.0 4.4 4.5 693 432 340

.20 AC-FT 10,780 .80 AC-FT 17,400 SANTA ANA RIVER BASIN

11055800 CITY CREEK NEAR HIGHLANDS, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND OF CITY CREEK AND CITY CREEK WATER CO.,'S CANAL

DAY OCT JUN jut AUG SEP 1 5.5 4.3 16 8. .94 2 5.2 4.4 11 B. 7.6 6.5 14 5.9 3.2 2.0 1.8 1.0 3 5.2 4.5 9.6 B. 7.5 6.5 10 5.9 3.0 1.9 1.6 1.3 4 1.7 5 1.4 1.3

6 1.7 1.4 1.0 7 1.6 .86 8 4.5 4.9 9.5 7.7 6.9 52 7.3 5.B 5.1 2.7 1.4 .80 9 4.5 5.0 9.2 7.6 7.3 18 7.0 5.7 4.8 2.1 1.3 .72 U 4.3 5.0 8.9 7.2 7.2 12 6.4 5.7 4.4 1.6 1.3 .64 11 4.2 4.9 8.8 7.5 7.1 10 5.4 6.0 3.9 1.4 1.2 .61 12 1.2 1.2 .65 13 4.2 4.8 8.9 7.1 8.9 9.2 5.7 8.9 3.4 1.1 1.2 .65 4.2 4.8 8.8 6.9 8.9 8.6 5.5 6.8 3.4 1.4 1.5 .60 15 1.6 1.7 1.3

16 4.1 5.0 9.3 6.9 7.8 8.0 6.8 5.5 3.1 1.6 1.8 1.5 17 4.2 5.1 8.8 6.9 7.8 .92 18 4.1 5.3 .78 19 4.1 16 .94 20 4.2 63 1.8 1.2

21 22 4.9 13 10 6.4 7.1 7.9 6.0 5.1 1.9 .88 1.7 1.1 23 4.7 9.8 1.3 1.4 .80 24 4.5 8.8 12 6.1 7.5 7.1 5.8 5.0 2.4 1.3 1.1 .71 25 4.5 8.1 12 6.9 7.2 7.2 5.7 4.7 2.5 1.3 1.2 .66 26 4.6 7.8 12 8.0 7.0 7.1 5.8 4.1 2.3 1.2 1.2 .62 27 4.5 7.5 11 10 6.9 7.0 5.9 3.8 2.2 1.3 1.2 .62 28 4.7 9.2 10 9.5 6.7 6.8 5.4 3.7 2.2 3.8 1.1 .73 29 1.1 .97 30 31 4.3 8.9 7.7 7.0 4.0 2.1 .99

MEAN 3.11 1.76 1.46 .95 MAX 5.5 63 17 10 8.9 52 14 8.9 5.1 4.2 2.0 1.7 MIN .88 .99 .61 588 406 332 185 108 90 57 13,070 HTR YR 1968 TOTAL 2.083.08 MEAN 5.69 MAX 63 MIN .61 AC-FT 4,130

COMBINE D DISCHARGE, IN CUBIC FEET PER SECOND OF CITY CREEK AND CITY CREEK HATER CO.,'S CANAL NEAR HIGHLAND, CALIF., WATER YEAR OCTOBER 19 S8 TO SEPTEMBER 1969 OAV OCT

1 1. 2.1 2.8 3.2 85 886 86 31 17 14 8.6 5.0 2 1. 2.1 2.9 3.2 78 620 75 31 18 13 8.2 4.9 3 1. 2.0 2.9 3.1 72 445 104 31 16 13 7.9 4.7 4 1. 2.2 2.9 3.2 68 330 79 34 16 13 13 4.7 5 1. 2.3 2.9 3.2 65 248 81 33 15 14 10 4.8

6 1. 2.2 2.9 3.2 160 238 82 37 15 15 8.5 4.8 7 1. 2.1 2.9 3.2 15 8.5 4.9 8 1. 2.0 2.7 3.3 14 14 8.5 5.2 9 1. 1.9 2.7 3.4 74 182 59 27 14 15 9.5 4.6 10 . 2 1.8 2.4 3.5 69 189 56 26 16 13 8.2 4.1

11 1. l.B 2.4 3.4 66 166 52 26 18 13 7.7 4.0 12 1. 25 17 14 7.6 4.1 13 1. 2.1 2.4 4.0 58 148 50 25 17 13 7.4 4.1 14 1. 2.3 2.6 22 54 138 49 24 17 12 7.2 4.4 15 1. 3.3 2.8 7.6 52 136 47 24 16 13 6.9 6.3 16 1. 3.0 6.9 7.1 17 1. 2.8 3.1 4.5 58 134 45 24 18 12 6.9 7.1 18 1. 2.5 3.0 4.3 66 132 45 23 18 12 6.9 6.8 19 1. 2.2 3.2 7.9 76 123 42 23 17 11 6.8 6.8 20 1. 2.1 2.9 120 82 104 41 23 17 12 6.4 6.9 21 1. 2.0 3.0 308 71 118 41 22 18 12 6.2 7.3 22 1. 2.1 3.4 302 64 105 40 22 17 11 5.7 7.2 23 1. 2.1 3.5 45 190 100 39 22 17 10 5.5 6.7 24 1. 2.2 3.4 269 1,020 97 34 22 17 10 5.3 6.4 25 1. 2.4 4.3 2.070 3.360 95 32 21 17 9.7 5.4 6.3 26 1. 2.6 9.7 1,460 2.900 94 31 21 27 1. 2.6 4.1 642 2,220 93 31 20 17 11 5.3 6.1 28 1. 2.6 JO 5.2 5.9 29 1. 2.6 3.2 162 91 32 19 15 9.7 5.4 S.7 30 l.B 2.7 3.1 120 91 31 IB 13 9.2 5.3 5.7 31 2.1 3.1 98 ::::: 90 18 8.8 5.2 221.4 168.7 193 52.2 25.1 16.4 12.1 7.14 5.62 MAX 2.1 3.3 9.7 2,070 3.360 886 104 37 IB 15 13 7.3 MIN .92 1.8 2.4 3.1 52 90 31 18 13 8.8 5.2 4.0 AC-FT 87 136 199 11,820 2 335 SANTA ANA RIVER BASIN

11055800 CITY CREEK NEAR HIGHLANDS, CALIF.--CONTINUED

CO.,'S CANAL

DAY )Cf NOV DEC JA J FEB MAR AP t MAY JUN J UL kUG SEP

1 .8 5.5 6.1 7. b 5.4 66 6. > 5.9 3.8 2 .7 .8 1.7

3 .6 5.6 5.9 5.2 25 6. 5.4 .5 2 .6 .7 1.6 4 .3 5.6 6.0 5.2 21 6. 5.4 .7 2 .5 .8 1.6 5 .1 5.8 6.1 5.1 37 6. 5.3 .7 2 .5 .9 1.8 6 .9 18 6.0 5.1 22 6. 5.6 .8 2 .4 .8 1.8 7 .8 27 6.1 5.0 17 6. 5.B .8 2 .3 .6 1.8 8 .7 9.3 7.1 5.2 15 6. 5.7 .0 2 .3 .6 1.7 9 .7 7.4 8.8 5.4 13 6. 5.7 .6 2 .4 .6 1.7 1C .0 6.7 8.3 1 22 18 6. 5.7 .3 2 .3 .7 1.6

11 .0 6.5 8.1 21 13 6. 5.7 .0 2 .5 .7 1.5 12 .0 6.2 7.9 10 11 6. 5'. 7 .7 2 .4 .8 1.6 13 .0 6.0 7.7 8. 8.3 10 6. 5.4 .5 2 .3 .8 2.0 1* t 15 ( 16 ( .5 7.3 7.4 8. 6.8 8.5 6. 4.5 4.7 2 .0 .8 2.1 17 t .9 1.9 18 ( .9 1.8 I") .9 1.8 20 ( 3.8 1 .9 .9 1.9 21 < 22 ( 7.1 B. .0 .8 1.8 24 I .7 1.7 25 t 26 ( 27 < 28 ( 6.3 7. > 5.5 2.9 1 .8 .2 1.5 29 ' .8 5.8 7.6 6.C 6.3 7. r 5.2 3.1 1 .8 .1 1.5 30 " 1.7 31 .6 7.6 5. , 6.2 4.2 1 .8 L.8 TOTAL 19 MEAN 6 MAX ( .9 27 8.8 1 i 46 66 B. J 5.9 5.5 2 .7 >.9 2.3 MIN ) 311 232 1 33 114 104 SANTA ANA RIVER BASIN

11056200 SANTA ANA RIVER AT WATERMAN AVENUE, AT SAN BERNARDINO, CALIF.

DRAINAGE AREA.--359 sq mi (revised).

GAGE.--Water-stage recorder. Altitude of gage is 995 ft (from topographic map). Prior to Jan. 21, 1964, at dif-

AVERAGE DISCHARGE.--13 years, 28.0 cfs (20,290 acre-ft per year); median of yearly mean discharges, 2.4 cfs (1,700 acre-ft per year). EXTREMES«--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (350 cfs), water years 1966-70 Date Time Disch. G.H. Date Time Disch. G.H. ' Date' Time Disch. G.H. Nov. 22, 1965 2130 *17,200 7.94 Dec. 6, 1966 2100 *12,800 6.16 Jan. 25, 1969 1600 *20,000 8.5 Dec. 29, 1965 2230 3,140 3.40 Aug. 23, 1967 1530 388 2.95 Feb. 25, 1969 Jan. 30, 1966 2000 1,410 2.17 Feb. 6, 1966 2000 996 1.95 Nov. 19, 1967 2100 515 2.98 Jan. 16, 1970 1430 *424 5.13 Mar. 8, 1968 0700 *872 3.53 Feb. 10, 1970 2000 365 4.85 Dec. 3, 1966 1500 1,090 5.98 No flow for long periods ch year. Period of record: Ma discharge, 20,000 cfs Jan. 25, 1969 (gage height, 8.5 ft); no flow for most of time in each year. Maximum discharge, 75,700 cfs Mar. 2, 1938, from combined discharges of Santa Ana R: 3ar Mentone, Mill Creek near Yucaipa, and Plunge Creek near East Highlands. REMARKS.--Records poor. Flow partly regulated by Big Bear Lake (see station 11049000). Natural flow of st affei

DAY AUG SEP 1 8.2 0 0 58 00 0 1.7 0 1.3 1.6 2 2.1 0 0 27 00 0 0 1.5 0 .60 3 .50 0 0 4.2 00 0 0 3.1 .90 .90 4 0 0 0 .80 0 0 0 0 9.3 D 1.3 5 0 0 00 00 0 0 2.6 0 1.6

6 .20 0 0 0 269 0 0 0 .40 0 .50 7 .90 C 00 52 0 0 0 1.2 0 .40 8 0 0 00 Ob 0 0 0 .30 .80 9 0 0 110 0 00 0 U 0 0 .40 1C 0 0 168 0 00 0 C .40 0 .10 11 0 C 00 00 0 C 1.4 2.2 1.0 12 0 0 00 00 0 0 0 1.0 1.3 13 0 0 00 00 0 0 0 .40 3.9 14 0 27 00 00 0 0 0 1.7 8.4 15 0 47 00 00 0 0 0 2.B 2.T 16 0 130 00 00 0 C 0 0 1.1 17 0 4.5 00 00 0 0 0 0 .10 18 0 3.4 00 00 0 0 0 0 1.6 19 0 0 00 00 1.6 0 0 0 2.1 2C 0 0 00 00 .50 C 0 0 1.5 21 0 0 00 0 C .70 0 0 .20 1.0 22 0 2t420 00 00 0 0 0 0 0 23 0 5,000 00 00 .40 0 0 0 .60 24 0 700 00 0 .20 1.5 0 0 0 0 25 0 550 00 0 .20 3.5 0 .10 0 0

26 0 35 00 00 .40 0 0 .50 0 2T 0 10 00 00 1.3 0 0 .70 1.3 28 0 5.0 00 00 .50 C .20 .70 .50 29 0 3.0 715 0 0 .60 0 1.6 1.2 3.8 30 0 1.0 878 301 0 1.1 0 1.0 .40 12 31 100 7.1 0 3.3 .70 .70

MEAN MAX 8.2 5,000 87B 301 269 .20 0 3.5 1.7 9.3 2.8 12 WIN 0 0 0000 0 0 0 0 0 0 0 31 3.4 47 29 101 AC-FT 22,360

NOTE. NO GAGE-HEIGHT RECORD NOV. 23 TO DEC. 23, DEC. 31 TO JAN. 29. SANTA ANA RIVER BASIN

11056200 SANTA ANA RIVER AT WATERMAN AVENUE, AT SAN BERNARDINO, CALIF.--CONTINUED

DAY OCT DEC JAN I 9.5 0 0 0 0 0 0 8.2 a .10 .20 2 14 0 0 0 0 3.0 .20 12 0 .70 .20 3 2.7 0 444 0 0 0 .40 12 0 .60 0 4 3.4 0 10 0 0 .90 .10 12 0 .30 C 5 24 0 1 ,660 0 0 0 .70 7.0 a .80 .13 6 2.0 0 4 .340 0 0 0 .20 5.0 0 1.2 0 7 0 16 1 .230 0 0 1.1 0 2.1 0 .90 0 B 0 .10 440 0 0 0 .10 7.0 a 0 0 9 0 0 90 0 0 0 .20 12 0 .20 0 10 11 0 B.O .0 c 0 .60 16 0 .20 0 11 0 a 2.0 0 c 10 1.6 19 0 0 0 12 0 0 1.0 0 c 0 1.6 21 2.4 .10 c 13 0 0 0 0 9.4 c .50 23 7.0 .50 0 14 0 0 0 0 1.3 0 0 29 23 .10 .10 15 0 c 0 0 0 0 0 23 0 0 .40 16 0 0 0 0 0 0 0 25 0 C .40 17 0 0 0 0 0 0 0 21 0 .60 0 18 0 0 0 0 0 1.7 .60 2.7 0 -1.6 1.4 19 0 0 0 0 0 6.0 .70 25 0 .60 .10 20 0 0 0 0 0 .10 1.6 4.2 0 .60 .70 21 0 0 0 0 0 .80 .60 .60 0 .20 .50 22 0 0 0 .70 0 34 1.9 0 0 0 0 23 0 0 0 0 .30 3.4 1.6 0 0 16 1.5 24 0 0 0 32 0 2.1 0 0 0 10 .10 25 0 0 0 42 0 .10 0 0 0 8.0 .50 26 0 0 0 25 0 .10 0 0 a 5.0 1.3 27 0 0 0 15 0 .80 .80 0 0 3.0 .30 28 0 0 0 e.o 0 0 1.6 0 .50. 2.0 1.2 29 0 0 0 4.0 0 0 5.0 0 1.0 0 2.1 30 0 0 0 1.0 0 0 B.2 0 .20 .30 .30 31 0 0 0 5.3 9.5 .50 .3C TOTAL MEAN 2.15 .54 265 4.12 MAX 24 16 4,340 42 0 9.4 34 9.5 29 23 16 2.1 MIN 0 0 0 0 0 0 0 0 0 0 C 0 AC-FT 132 0 32 23

DISCHARC!E, IN CUE)IC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMIiER 1968 DAY OCT DEC 1 1.0 0 1.5 3.0 0 13 3.6 .10 1.5 1.7 1.3 2 0 2.0 0 3.0 0 .79 4.8 .10 .50 1.0 1.3 3 0 3.0 0 6.0 0 0 2.1 0 1.4 1.7 1.3 4 0 3.0 0 5.0 0 0 4.5 .40 4.1 1.0 .60 5 0 3.0 1.") 4.0 0 0 2.8 .10 1.5 1.5 .40

6 0 2.0 1.9 2.0 2.7 0 .60 .40 1.9 .60 1.3 7 0 3.0 6.2 1.0 3.6 0 0 3.1 7.2 .50 l.C 8 0 3.0 6.2 0 91 0 0 5.3 3.1 .30 .60 9 0 3.0 8.3 0 3.9 0 0 0 1.7 .BO .60 10 0 3.0 12 0 0 0 0 0 0 .60 .40 11 0 2.0 13 0 0 0 0 0 .60 .30 .20 12 0 0 21 0 0 0 0 0 1.3 ,20 .40 13 0 0 16 0 0 1.9 .BO 0 1.7 .1C .20 14 0 0 6.2 0 .30 11 5.2 0 2.1 .10 0 15 0 3.5 2.1 0 0 .60 9.3 0 2.1 .10 0 16 0 1.9 8.3 0 0 17 10 0 3.1 .10 0 17 0 1.7 11 0 0 .BO 10 0 2.0 .10 0 IB 7.0 4.2 29 0 0 .60 3.1 0 1.2 .10 0 19 2.0 53 14 0 0 .50 2.5 0 1.4 .10 0 20 2.0 59 10 0 0 .40 2.0 0 1.6 .10 0

21 1.0 42 8.0 0 0 .40 1.5 0 2.0 .10 0 22 2.0 6.2 7.5 0 0 1.7 1.0 .20 1.4 .10 2.5 23 3.0 .20 7.0 0 0 5.2 .BO 5.4 1.2 .10 0 24 2.0 0 6.0 0 0 .20 2.3 4.4 1.0 0 0 25 0 0 6.0 0 0 0 .60 1.9 .80 0 0 26 0 0 5.0 0 0 .30 0 2.8 0 0 0 27 0 0 5.0 2.0 0 10 0 1.6 5.2 0 .60 2B 1.0 0 5.0 10 0 5.2 0 l.B 21 .40 .60 29 1.0 0 4.0 0 0 0 0 8.3 6.2 1.0 .10 30 0 8.6 4.0 0 0 0 .60 6.2 11 1.0 .40 31 0 4.0 0 0 .40 4.2 1.0

MEAN .55 6.91 7.42 1.16 0 3.27 2.32 2.22 1.40 3.03 .48 .47 MAX 3.0 59 29 10 0 91 17 10 8.3 21 1.7 2.5 MIN 0 0 0 0 0 0 0 0 0 0 0 0 71 0 201 13B 136 84 186 30 2B SANTA ANA RIVER BASIN

11056200 SANTA ANA RIVER AT WATERMAN AVENUE, AT SAN BERNARDINO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

1 0 0 .40 3D 1,400 4BO 450 300 182 96 30 2 0 0 .60 25 1,200 680 540 300 178 91 29 3 .20 0 .20 20 1,000 650 580 305 170 87 29 4 0 0 0 18 600 630 650 305 160 83 28 5 0 0 0 10 400 575 730 300 154 80 28 6 0 0 0 400 280 540 710 295 148 75 115 7 0 0 0 285 148 72 175 8 0 0 0 50 9 0 0 0 10 0 0 0

11 0 0 0 10 650 410 585 270 145 59 95 12 0 3.5 0 3.0 580 13 0 0 10 2.0 540 390 530 270 145 53 65 14 0 0 54 1.0 500 380 15 16 0 0 5.0 480 730 480 270 140 48 49 16 0 0 0 3.0 450 17 0 0 0 2.0 430 710 460 270 138 44 38 18 0 4.7 1.6 270 132 42 35 19 0 11 2.7 20 0 10 141 50 400 580

21 5.7 1,200 38 27 22 0 2.6 690 60 450 480 425 250 130 37 25 23 0 1.0 24 0 1.0 25 0 19 6,500 8,200 410

26 0 40 2,800 5,250 410 355 330 220 145 33 20 27 0 .40 1,600 4,700 390 350 310 215 130 32 19 28 0 .50 29 0 1.0 200 ______360 340 290 200 108 31 17 30 0 .60 60 31 16 31 TOTAL MEAN MAX 0 16 MIN 0 0 0 0 1.0 240 340 290 190 100 30 16 AC-FT

MIN 0 AC-FT 1,110 0 AC-FT 194,700

NOTE. NO SAGE-HEIGHT RECORD OR STAGE-BIS CHARGE RELATION INDEFINITE JAN. 21 TO SEPT. 30.

DISCHARGE, IN CUBIC FEET DAY 0

1 14 2.8 4.0 1.0 3.0 42 2.4 0 .01 0 2 13 2.7 5.0 1.0 3.0 40 2.2 0 .01 0 3 11 2.7 6.5 1.0 3.0 15 2.0 0 .01 0 4 .0 2.6 6.6 1.0 3.0 25 1.8 0 .01 0 5 .0 2.5 6.3 1.0 3.6 20 1.6 .01 .50 0

6 .0 15 6.0 1.0 5.4 10 1.4 .02 1.0 0 7 .0 20 5.7 1.0 6.6 9.8 1.2 .02 1.8 0 8 .0 10 5.4 1.0 5.4 9.6 1.0 .02 2.0 0 10 1.5 4.8 30 40 10 .60 .02 7.8 0 11 1.8 4.5 16 16 9.8 .40 .02 6.6 0 12 2.5 4.2 6.6 11 9.6 .20 .02 2.0 0 13 1.5 3.9 6.6 10 9.4 0 .02 1.0 0 14 .60 3.6 9.0 7.8 9.2 0 .03 .50 0 15 .50 3.3 7.8 7.8 9.0 0 .09 .20 0

16 .40 3.0 16 5.4 8.6 0 .09 .10 0 17 .30 2.7 8.0 7.8 8.2 0 .05 .05 0 18 .20 2.4 7.6 9.0 7.8 0 .11 .01 0 19 .10 2.2 7.2 9.0 7.4 0 .09 .01 0 20 .05 2.0 6.8 9.0 7.0 0 .04 .01 0 21 .01 .8 6.4 9.0 6.6 0 .03 0 0 22 0 .7 6.0 9.0 6.2 0 .02 0 D 23 0 .6 5.6 10 5.8 0 .01 0 0 24 0 .5 5.2 10 5.4 0 .01 0 0 25 0 .4 4.8 10 5.0 0 .01 0 0

26 0 1.3 4.4 14 4.6 0 .01 0 0 27 1.2 4.0 11 4.2 0 .01 0 0 28 1 0 1.2 3.6 24 3.B 0 .01 0 .11 29 0 1.1 3.4 3.4 0 .03 0 5.9 30 .1 3.0 1.1 3.2 3.0 0 .05 0 .05 31 1.0 3.0 2.6 .11 0 0 MEAN 3. 6 2.54 3.29 5.94 9.66 10.5 .52 .031 .95 .20 0 0 MAX 1 20 6.6 30 40 42 2.4 .11 7.8 5.9 0 0 MIN 1.0 1.0 3.0 2.6 0 0 0 0 0 0 0 0

WTR YR 1970 TOTAL 1,124.42 MEAN 3.0 MAX 42 MIN 0 AC-FT 2,230

NOTE. NO GAGE-HEIGHT RECORD OCT. 4 TO NOV. 5, NOV. 15 TO JAN. 9, MAR. 2 TO JUNE 20. SANTA ANA RIVER BASIN

11056500 LITTLE SAN GORGONIO CREEK NEAR BEAUMONT, CALIF. LOCATION. --Lat 34°01'45", long 116°56'43", in NW^SWsNWi sec.l, T.2 S., R.I W. , San Bernardin County, on down­ stream side of left abutment of bridge on Oak Glen Road, 3.0 miles upstream from Wallace reek and 7 miles north of Beaumont. DRAINAGE AREA. --3. 23 sq mi. PERIOD OF RECORD. --October 1948 to September 1970. GAGE. --Water-stage recorder and concrete control. Altitude of gage is 4,320 ft (from topographic map) . AVERAGE DISCHARGE. --22 years, 0.507 cfs (367 acre-ft per year). EXTREMES. --Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maj s 1966 -70 Date Time Disch. G.H. Date Time Disch. G.H. Date Tiipe Disch. G.H. Nov. 22, 1965 1900 169 1.98 Sept .29, 1967 1600 40 1.60 Jan. 21, 1969 0900 162 2.02 Dec. 29, 1965 1830 *229 2.07 Jan. 2S, 1969 1100 1,990 a3.45 Nov. 19, 1967 0900 77 1.74 Feb. 6, 1969 1000 21 1.50 Dec. 3, 1966 1200 74 1.73 Mar. 8, 1968 0730 *96 1.80 Feb. 25, 1969 1600 11,000 aS.50 Dec. 6, 1966 1800 *302 2.15 Apr. 5, 1969 1900 77 1.69 Sept. 2, 1967 1400 140 1.90 Jan. 14, 1969 0900 14 1.40 Feb. 28, 1970 1400 From floodm imum daily discharge Wtr y Date Discharge Wtr yr Date 1966 Long periods 1969 Long periods 1967 1970 1968 Period of record: Maximum discharge, 11,000 cfs Feb. 25, 1969 (gage height, 8.50 ft, from floodmarks), from rating curve extended above 32 cfs on basis of slope-area measurements at gage heights 2.18, 3.45, 8.50 ft; no flow for several months in most years. REMARKS.--Records good. all diversions above station for irrigati See schematic diagram elsewhere in thi REVISIONS.--WSP 1928: I DIS

DAY OCT NOV

9.4 1.2 .20

31

TOTAL 25.80 10.20 MEAN .86 .33 MAX 15 B.5 MIN AC-FT SANTA ANA RIVER BASIN

11056SOO LITTLE SAN GORGONIO CREEK NEAR BEAUMONT, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 DEC JUN

1 0 0 0 0 2 0 0 0 4.5 3 0 18 0 .10 .50 .70 .30 .40 .20 .2C 0 0 2B 0 .20 .50 .50 .30 .40 .20 .10 0 6 0 43 0 .30 .SO .SO .30 .40 .20 .10 0 7 .10 2.7 0 .30 .so .60 .40 .30 .20 .10 0 8 0 .30 0 .30 .50 .60 .60 .30 .20 .10 0 9 c 0 0 .30 .50 .60 .60 .30 .20 .10 0 13 0 .30 0 .30 .50 .70 .60 .30 .20 .10 0 11 0 0 0 .30 .60 .70 .60 .40 .50 .1C 0 12 0 0 0 .30 .60 .70 .60 .40 .30 .10 0 3 0 0 0 .30 1.0 .70 .60 .40 .30 .10 0 4 0 0 0 .30 .90 .70 :60 .40 .30 .10 0 0 0 0 .30 .50 .SO .SO .30 .20 .10 0 6 0 0 0 .30 .40 .50 .50 .30 .20 .10 0 7 0 0 0 .30 .40 .40 .50 .30 .20 .10 0 8 0 0 0 .30 .40 .50 .50 .30 .20 .10 0 9 0 0 0 .40 .40 .70 .50 .30 .20 .10 0

1 0 0 0 .40 .60 .70 .50 .30 .20 .10 0 2 0 0 .40 .40 .60 .90 .SO .30 .30 .10 0 3 0 ,0 0 .30 .70 .90 .50 .30 .20 .1C 0 0 0 1.5 .30 .70 .90 .40 .30 .20 0 0 5 0 0 .70 .30 .70 .60 .40 .30 .20 c 0 6 0 0 .20 .30 .70 .50 .40 .20 .20 0 .10 7 0 0 .10 .30 .60 .30 .40 .20 .20 0 .20 B 0 0 .10 .30 .60 .30 .40 .20 .20 0 .20

TAL 0 .10 92.50 3.30 8.30 17.90 18.30 14.10 9.50 6.90 2.60 B.60 AN 3 .003 2.98 .11 .30 .SB .61 .4S .32 .22 .084 .29 X 0 .10 43 1.5 .40 1.0 .90 .60 .40 .50 .20 4.5 N 0 0 0 0 .20 .40 .30 .30 .20 .20 C 0 C-FT 0 .2 183 6.6 16 36 36 28 19 14 5.2 17 IBS 361

DISCHARGE , IN CUBIC FEET PER SECOND, HATER YEAR OCTO »ER 1967 TO SEPTEM SER 196B AY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

2 .80 .40 .20 .30 .40 .30 .60 .20 .20 0 4 .80 .30 .10 .20 .30 .30 .30 .20 .20 0 5 .80 .30 .10 .20 .30 .30 .20 .20 .20 0 6 .70 .30 .10 .20 .30 .90 .20 .20 .20 .10 7 .70 .30 .10 .20 .30 .50 .20 .20 .20 .10 8 .70 .30 .20 .20 .30 13 .20 .20 .20 0 9 .70 .30 .30 .20 .30 1.0 .20 .20 .20 c 10 .70 .30 .20 .20 .30 .SO .20 .20 .20 0

12 .60 .30 .30 .30 .30 .30 .20 .30 .20 0 14 .60 .30 .40 .20 .40 .30 .20 .30 .10 0

16 .50 .40 .40 .20 .30 .30 .20 .20 .10 0 17 .SO .SO .60 .20 .30 .30 .20 .20 .10 0 19 .40 19 .6 .20 .30 .30 .20 .20 .10 0 20 .40 2.1 .0 .20 .30 .30 .20 .20 .10 0 21 .40 .70 .0 .20 .30 .30 .20 .20 .10 0 22 .50 .30 .0 .20 .30 .30 .20 .20 .10 0 23 .50 .30 .0 .20 .30 .30 .20 .20 .10 .10 24 .50 .30 .0 .30 .30 .30 .20 .20 .10 0 25 .SO .30 .70 .30 .30 .30 .20 .20 0 3 26 .50 .30 .70 .30 .30 .30 .20 .20 0 0 27 .50 .30 .SO .60 .30 .30 .20 .20 0 0 2B .60 .60 .30 .60 .30 .30 .20 .20 .10 .50 30 .40 .70 .20 .50 .30 .20 .20 .10 .10

EAN .59 l.OS .49 .28 .32 .77 .23 .21 .13 .036 0 0 AX .80 19 1.6 .60 .50 13 .60 .30 .20 .SO 0 0 IN .40 .20 .10 .20 .30 .30 .20 .20 0 0 0 0

AL YR 1967 TOTAL 154.20 MEAN .42 MAX 19 MIN 0 AC-FT 306 SANTA ANA RIVER BASIN

11056500 LITTLE SAN GORGONIO CREEK NEAR BEAUMONT, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

1 0 0 1.0 9.0 8.5 8.5 5.2 3.8 3.5 1.4 2 0 0 1.0 B.5 8.5 9.8 5.2 3.8 3.5 1.2 3 0 0 1.4 8.3 8.5 9.8 5.2 4.2 3.5 1.2 4 0 0 1.4 8.1 7.9 9.8 4.7 4.7 3.5 1.2 5 0 0 8.5 8.0 14 9.8 4.7 4.7 3.5 1.2 6 C 0 13 7.9 7.3 9.B 4.7 4.2 3.2 1.2 7 0 0 2.9 7.8 6.7 B.5 5.2 4.2 3.2 1.4 8 0 0 2.1 9 0 0 10 0 0 11 0 0 12 0 0 7.3 7.9 5.2 3.8 2.9 1.4 13 14 15 .35 .50 16 .17 .40 2.9 7.3 8.5 7.3 4. 3.B 2.1 1.9 17 C .32 2.9 7.3 6.5 7.3 4. 4.2 .9 1.9 18 0 .22 3.5 7.3 8.5 7.3 4. 4.2 .9- 1.9 19 0 .40 20 4.2 .9 1.9 21 0 ~48, 4.2 7.9 7.3 6.2 4. 4.2 .9 1.9 22 0 1.9 4.7 7.9 7.3 6.2 4. 3.8 .9 1.9 23 C 1.2 5.2 8.5 7.9 6.2 4. 3.8 .9 1.9 24 0 59 114 8.5 7.9 5. 5. 3.8 .6 1.9 25 0 359 1.180 9.8 8.5 5. 5. 3.6 .6 1.9 26 0 54 22 9.6 8.5 5. 4. 3.5 1.6 1.9 27 0 29 11 8.5 8.5 5. 5. 3.5 1.6 1.9 28 0 1.2 10 8.5 8.5 5. 5. 3.5 1.6 1.9 29 0 1.2 B.5 8.5 5.2 4. 3.5 1.4 1.9 30 0 1.0 B.5 6.5 4.7 4. 3.5 1.4 1.6 31 .86 TOTAL 0 .52 0 564.32 1,417.6 247.8 240.7 223.4 147. 121.8 74.0 49.1 MEAN MAX 0 .35 0 359 1,160 9.8 14 9.8 5. -4.7 3.5 1.9 HIN 0000 1.0 7.3 6.7 4.7 4. 3.5 1.4 1.2 AC-FT 0 1.0 0 1,120 2,810

MTR YR 1969 TOTAL 3.C66.74 MEAN 8.46 MAX 1,180 HIN 0 AC-FT 6,120

DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 DAY OCT NOV DEC JAN FEB 1 .6 .8 i .86 3.8 .86 .60 .40 .16 .08 .02 2 .6 1.0 .86 2.9 .86 .60 .40 .12 .08 .02 3 .6 1.0 .86 1.6 .86 .60 .40 .12 .08 .02 4 .6 1.0 .86 1.4 .86 .60 .40 .12 .08 .02 5 .6 1.0 .72 1.6 .86 .60 .40 .12 .02 .02 6 .6 1.0 .72 1.4 .86 .72 .40 .12 .02 .02 7 .6 1.0 8 .6 1.0 .72 1.4 .86 .72 .40 .12 .02 .02 9 .6 1.0 .72 1.4 .86 .72 .40 .12 .02 .02 10 .6 1.2 .86 1.4 .86 .72 .40 .12 .02 .32 11 .6 1.2 .86 1.4 .66 .72 .40 .12 .02 .02 12 .4 1.2 .66 1.4 .66 .72 .40 .12 .02 .02 13 .4 1.2 :86 1.4 .86 .72 .40 .08 .02 .02 14 .4 1.2 .66 1.2 .86 .72 .32 .OB .02 .02 15 .4 1.2 .86 l.Z .86 .72 .32 .06 .02 .02 16 .4 1.2 .66 1.2 .66 .60 .32 .06 .02 .02 17 .4 1.2 .72 1.2 .86 .60 .32 .06 .02 .02 1.2 .02 19 .4 1.2 .72 1.2 .72 .60 .26 .06 .02 .02 20 .4 1.2 .72 1.2 .72 .60 .26 .06 .02 .02 21 .4 1.0 .72 1.2 .72 .60 .26 .06 .02 .02 22 .4 1.0 .72 1.2 .72 .50 .26 .06 .02 .02 23 .4 1.0 24 .4 .8 .72 1.0 .60 .50 .21 .06 .02 .02 25 .4 .02 26 0- .6 27 .4 .8 .72 1.0 .66 .60 .21 .06 .02 .04 28 .4 8 2.1 1.0 .86 .60 .21 .06 .02 .02 29 .4 .B 1.0 .86 .50 .21 .06 .02 .06 30 .4 8 1.0 .72 .50 .21 .06 .02 .04 31 .4 - 1.0 .50 .08 .02 . 86 .70 MEAN 1 47 1 1. 21 1.0 .82 1.37 .80 .61 .32 .087 .028 .023 MAX .6 .4 1. 2.1 3.6 .86 .72 .40 .16 .06 .06 MIN .4 B6 .8 .72 1.0 .60 .50 .21 .06 .02 .02 AC-FT 90 1 74 6 46 64 46 36 19 5.4 1.7 1.4 164 SANTA ANA RIVER BASIN

11057000 SAN TIMOTEO CREEK NEAR REDLANDS, CALIF. LOCATION.--Lat 34°01'59", long 117°12'29", in NEWsNE's sec.5, T. 2 S. , R. 3 W. , San Bernardino County, on down­ stream side of right abutment of county highway bridge, 2.0 miles southwest of Redlands and 3.4 miles down­ stream from Yucaipa Creek. DRAINAGE AREA.--119 sq mi. PERIOD OF RECORD.--October 1926 to September 1968 (discontinued).

to Oct. 30, 1934, at site 2 miles upstream at different datum.

AVERAGE DISCHARGE.--42 yea 5, 1.38 cfs (999 acre-ft pe ar); median of yearly mean discharges, 0.5 cfs 360 acre-ft per year). EXTREMES.--Max mums and minlmums (discharge in cubic feet per second, gage height in feet). al maximum discharge (*) and peak discharges above base (150 cfs), water years 1966-68 Date Time Disch. G.H. Date Time Disch. G.H. Dat Time Dis ch. G.H. Nov. 22, 1965 2200 *1,360 4.22 Dec. 6 , 1966 2145 *2,360 5.25 Nov 21, 1967 1530 197 2.03 Dec. 9, 1965 1300 324 2.49 Jan. 24 , 1967 2330 800 3.30 Mar 8, 1968 0845 *1, 130 3.79 Dec. 29, 1965 2100 500 2.8? Aug. 23 , 1967 1600 398 2.53 Dec. 3, 1966 1430 860 3.40 Nov. 19 , 1967 1700 316 2.34 No flow for most of time in each year. flow; no flow for several months in each ye ar. REMARKS. --Records fair. No regulation above s At tunes, small amounts of irrigation waste water passes station. REVISIONS (WATER YEARS). --WSP 1635: 1935-36, 1940-41, 1943. WSP 1928: Drainage area. DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1968 1966.... 210 NOV. 19, 1967 ... 50 17...... 5.3 28...... 20 JAN. 22, 1967.... 8. 4 20...... 2.5 . 46 23...... 67 21...... 8.9 22...... 282 30...... 9.1 24...... 161 23...... 357 FEB. , 1966.. 1.4 25. 19...... 2.3 ...... 2. 8 MAR. 8, 1968 ... 196 .60 19. DEC. 9...... 13 ...... 391 22. 50 . 747 AUG. 17...... 17

MONTH CFS-DAYS MAXIMUM MINIMUM MEAN RUNOFF IN ACRE-FEET NOVEMBER 1965 ...... 35 0 22.1 1,320 DECEMBER ...... 106.40 4 0 3.43 211 35 0 2.61 1,890

FEBRUARY 1966...... 1.4 .4 0 .050 2.6 ...... 771.50 35 0 2.11 1,530 ...... 1,561.60 74 0 50.4 3,100 ...... 1,563.00 74 0 4.28 3,100 ...... 262.4 16 0 8.46 520 .8 0 .13 1.5 ...... 17 r 0 .55 34 WTR YR 1967...... 74 0 5.05 3,660

50 0 2.05 122 ...... 21.3 19 0 .69 42 161 0 1.00 726 ...... 196 196 0 6.32 389 APRIL...... 10 .10 0 .003 .2 196 0 .76 553 NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. SANTA ANA RIVER BASIN 1

11057500 SAN TIMOTEO CREEK NEAR LOMA LINDA, CALIF. LOCATION.--Lat 34°03'49", long 117°16'19", in San Bernardino Grant, San Bernardino County, on right bank 50 ft ruary 1968, at site 0.5 mile downstream. DRAINAGE AREA.--125 sq mi. PERIOD OF RECORD.--October 1954 to September 1965, February 1968 to September 1970. GAGE.--Water-stage recorder. Altitude of gage is 1,040 ft (from topographic map). Prior to February 1968, at site 0.5 mile downstream at different datum. AVERAGE DISCHARGE.--13 years, 2.93 cfs (2,120 acre-ft per year); median of yearly mean discharges, 1.2 cfs (870 acre-ft per year) . EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (150 cfs), February 1968 to September 1970 Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Mar. 8, 1968 0900 1,090 3.68 Jan. 25, 1969 1400 10,400 7.20 . Mar. 1 ;, 1970 0500 '831 4.07 Feb. 6, 1969 Jan. 21, 1969 0900 2,400 4.40 Feb. 25, 1969 1200 '15,000 a8.2 a From floodmark.

Period of reco rd: Maximiim di scharge, 15,000 c fs Feb. 25, 1969 (gage height, 8.,2 ft, from floodmark), peak i eral days in some years. REMARKS.--Records good except those for water year 1969, which are poor. No gage-height record Jan. 26 to July 24, 1969. No regulation above station. Natural flow affected by pumping and return flow from irrigated areas. DISCHARGE, IN CUBIC FEET PER SECOND, FEBRUARY TO SEPTEMBER 1966 JUN JUL AUG SEP

.10 .30 3.7 0 0 3.2 .30 .30 .20 .40 7.2 0 0 2.8 .33 .30 .10 .50 1.5 .20 .70 2.8 .4C .30 0 .40 3.4 .10 1.0 3.6 .40 .30 0 .20 2.1 0 1.0 2.0 .70 .30 .30 2.2 .90 .10 1.0 2.6 1.2 .30 .10 3.2 1.4 .50 .40 5.2 1.0 .30 .10 188 .63 .40 .30 5.8 1.8 .30 .20 0 .40 .20 .70 9.6 7.1 .30 .20 0 .80 .70 .80 9.6 4.6 .30

.40 0 .70 1.2 .60 8.6 2.8 .30 .50 .50 .80 1.8 1.2 6.4 0 .30 .20 .20 .40 i.e 2.4 5.2 1.0 .30 .10 .10 .80 .60 2.8 6.6 2.0 .30 .20 .10 1.2 .60 3.3 7.8 2.3 .30 .20 0 1.0 1.5 3.2 6.4 1.3 .30 .20 .50 1.7 2.8 4.2 6.4 .10 .30 .20 1.0 1.2 .40 4.6 5.8 .8C .30 .30 .80 .80 .70 2.7 1.6 1.1 .40 .30 1.0 .70 1.0 3.6 4.1 4.2 .40 .30 .10 1.5 2.8 3.6 1.2 4.6 .40 .20 0 1.2 1.7 1.2 .90 2.4 .50 .10 0 2.0 1.7 .90 .70 1.9 .50 .10 0 1.8 .20 3.6 .50 1.0 .50 .10 0 3.2 0 2.0 .20 3.0 .60 0 .40 2.5 .10 .20 .70 1.0 .69 .10 1.0 .20 0 .80 .50 .80 .60 0 1.0 .10 0 .80 .20 .60 .60 .10 .20 0 0 1.2 .10 .30 .70 .70 0 0 2.4 0 .30 .60 31 1.0 .10 0 .30

TOTAL 4.90 203.80 43. BO 21.60 51.40 113.30 49.60 12.00 MEAN MAX .50 188 7.2 2.6 4.6 9.6 7.1 .80 HIM 0 0 0 0 0 0 C .30 AC-FT 9.7 404 87 43 102 225 96 24 SANTA ANA RIVER BASIN

11057500 SAN TIMOTEO CREEK NEAR LOMA LINDA, CALIF.--CONTINUED

DISCHARGE , IN CUBIC FEET PER SECOND WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1.5 .31 .10 .22 1.5 .16 .03 .22 .01 2.5 .01 .03 .10 .43 .31 .14 1.2 .31 C .16 0 1.3 20 1 .1C .41 .1C .13 .68 .10 .03 1.0 -o .70 5.0 3 .10 .40 .16 .68 .85 .06 .31 .22 10 .50 1.0 3 .10 .40 .16 .85 2.0 0 .16 .C6 100 .30 1.0 2 .10 .40 .22 13 l.C .03 .16 .10 20 .10 -.05 1 .10 .50 .31 1.1 1.0 .31 .68 1.2 .06 .54 .68 1.0 .07 .03 .10 .10 .3 .31 .66 1.5 0 .10 .03 .50 5.0 .02 .10 .10 .3 .22 .42 1 1.2 0 .31 .22 .40 1.0 .01 .10 .10 .2 .22 .16 1 .54 .03 1.0 .10 .30 .10 .01 .10 .10 .1 .16 .22 13 .42 .06 ?.8 5.2 .30 .03 .01 .12 .15 .0 .22 .31 14 .42 0 1.5 19 .20 .03 .01 .12 .15 .9 .22 .31 15 .31 1.2 1.0 5.2 2.0 .03 0 .15 .15 . 9 .16 .32

16 .31 .54 3.6 .20 .03 0 .15 .17 .8 .22 .31 17 .22 C .31 1.2 .10 .03 C .12 .20 .8 .31 .14 18 .31 0 .22 4.2 .08 .03 0 .12 .25 8 .54 .31 19 .42 0 .54 5.3 .05 .02 0 .12 .40 .85 .22 2j .54 .16 .85 24 .02 .02 0 .12 .50 .3 .68 .15

21 .68 .42 .42 317 .0? .02 0 .10 .70 .20 .54 .54 22 .85 .85 .31 43 1.0 .02 0 .10 .90 .15 .31 .68 23 .85 .16, .10 .30 50 .01 0 .10 1.2 .12 0 1.0 24 .01 0 .10 1.7 .10 .15 1.2 25 .42 .03 5.1 1, 810 3 ,500 .01 .02 .10 1.0 .07 .07 1.0

26 .31 .03 7.1 10 350 .01 .02 .10 .80 .07 .10 .68 27 .22 .06 .54 5.0 60 28 .54 .10 .22 1.0 50 .01 .02 .30 .60 .22 .16 1.2 .22 1.5 31 1.8 .42 .03 .01 .10 .54 .16 TOTAL MEAN .83 .15 .84 79.0 186 MAX 2.0 1.2 7.1 1,810 3,500 8.0 20 35 1.7 1.3 .85 13 MIN .22 0 0 .03 0 .01 0 .03 .10 .07 0 .13 AC-FT 51 8.8 34 16 61

DISCHARG , IN CU 1C FEET PER SECOND , WATER YEAR OCT08ER 1969 TO SEPTEMBER 1970 DAY OCT NOV MAY JUN JUL AUG SEP

1 1.2 .42 .35 .80 2.0 122 0 .54 .42 .42 .03 .16 2 .85 .17 .85 .80 1.5 53 0 .54 .10 .58 .10 .22 3 .54 .06 1.0 .80 1.0 4.5 0 .42 .10 .42 .22 .31 4 .31 .42 1.0 .80 . 80 4.6 0 .22 .54 .10 .54 .42 5 28 0 .31 .68 0 .68 .31

6 .54 1.3 .54 1.0 .42 .54 0 .31 .31 .22 .68 .31 7 1.0 5.2 .54 1.2 .42 .42 .16 .31 .31 .42 .85 .31 8 .68 .85 1.0 1.8 9 .54 .85 .85 1.8 .85 0 .46 .54 .31 .31 .54 .22 10 .16 11 .42 .68 .42 .16 .16 .31 .10 12 0 0 .54 3.2 .68 .42 1.0 1.0 .31 .31 .22 .16 13 .28 0 14 .54 .21 .60 1.8 0 .68 2.4 .54 .42 .68 .31 .54 15 .54 .42 .60 2.4 0 .85 1.8 .42 .31 .68 .31 .54 16 .54 17 1.2 .34 .60 2.4 .08 .40 .54 1.2 .31 1.0 .42 .85 18 1.2 0 .60 2.4 0 .68 .68 .31 19 .68 .08 .60 2.4 0 1.2 1.0 .54 .10 .68 .54 1.2 20 .85 .05 .60 1.8 0 1.8 .54 .85 .13 .68 .42 .42 21 1.0 1.8 .70 1.5 0 2.0 .42 .54 .42 1.0 .31 .68 22 1.2 1.0 .70 1.8 .10 3.6 .54 .22 .54 .85 .31 .85 23 1.5 .68 .70 1.8 .24 1.8 .42 .31 .42 .54 .31 .22 24 1.0 .23 .70 1.8 .35 2.0 .31 .68 .31 .54 .31 .22 25 1.0 .16 .70 2.4 0 2.4 .42 26 .85 .31 .70 2.4 0 3.2 .16 1.2 .54 .16 .54 .22 27 .54 .42 .70 2.0 .42 3.6 .16 .85 .42 .22 .54 .03 28 .54 .68 .70 2.0 32 7.8 .85 .54 0 .22 .42 .31 29 .68 .54 .80 1.8 7.4 .68 .42 .30 .16 .42 .54 30 1.0 .52 .80 1.8 .11 .68 .42 .31 .31 .22 .68 31 .85 .80 1.5 12.55 8.22 MAX 1.5 5.2 1.0 5.8 32 122 2.4 1.2 .68 1.0 1.0 1.2 MIN 0 0 .35 .80 0 0 0 .22 0 0 .03 .03 19 29 25 25 SANTA ANA RIVER BASIN

11058SOO EAST TWIN CREEK NEAR ARROWHEAD SPRINGS, CALIF. ight

DRAINAGE AREA.--8.80 sq mi. PERIOD OF RECORD.--Dei Arrowhead Springs.

graphic map) .

AVERAGE DISCHARGE. --50 years (1920- 70) , ' 4 . 60 cf! ; (3,330 acre- ft per year) ; median of yearly mean di.charges 2.8 cfs (2,000 acre-ft per year).

. I»ltiA leei. pej , gage ii eight in feet). An 70

Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 17, 1965 2015 46 2.67 Mar. 13, 1967 2115 58 2.86 Jan. 21, 1969 424 a4.06 Nov. 22, 1965 1945 *830 5.41 Apr. 11, 1967 0830 48 2.78 Jan. 25, 1969 *2,300 a7.45 Dec. 29, 1965 700 5.15 Apr. 22, 1967 0315 97 3.08 Feb. 6, 1969 0730 236 3.53 Feb. 25, 1969 1315 1,700 6.52 Dec. 3, 1966 1000 214 3.47 Nov. 20, 1967 0130 47 2.70 Apr. 3, 1969 0145 .67 3.17 Dec. 6, 1966 1800 1,250 5.80 Nov. 30, 1967 1500 44 2.68 Jan. 24, 1967 2115 334 3.81 Mar. 8, 1968 0615 *101 3.04 Mar. 2, 1970 0445 *39 2.69 Lde gage

Annual minimum daily discharge, water years 1966-70 charge Wtr yr Date Discharge 1966 .30 1969 Oct. 19, 1968 .66 1967 Oct. 14, 24-26, 1966 .50 1970 Sept.19, 1970 .81 1968 July 24, 25, Aug. 10, 1968 .53

Oct. 1-9, 12, 20, 1965, Sept. 25, 26, 1966.

no flow at times in 1929, 1931-35.. REMARKS.--Records good. No gage-height record Jan. 21-25, 1969. No regulation above stati agr REVISIONS (WATER YEARS).--WSP 1635: 1924(M), 1927, 1928(M), 1929, 1932(M). WSP 1928: Drainage

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1.966 DAY OCT NOV DEC JAN FEE MAR APR MAY JUN JUL

.70 .60 4.7 32 4. 6 4.5 3.0 2.5 1.9 .90 .50 .80 3.8 23 4. 3 4.3 3.3 2.3 1.9 .80 .50 .60 3.5 15 4. 3 4.0 3.3 2.5 1.8 .90 .50 .60 3.5 11 4. 1 3.7 3.3 2.5 1.8 .80 .50 .60

3.5 10 16 3.5 3.3 2.5 1.7 .80 .60 .50 3.4 9,5 15 3.0 3.3 2.4 1.8 .80 .50 .60 3.1 8.9 11 3.0 3.3 2.4 2.3 .80 .50 .50 6.3 8.5 8, 5 2.9 3.3 2.5 2.2 .80 .4C .40 .2 8.0 7. 7 3.0 3.3 2.4 1.9 .70 .40 .40

2.4 1.6 .70 .40 .50 8.0 7.1 6. 5 3.0 3.2 2.3 1.5 .70 .50 .60 8.7 6.8 5. 6 3.0 3.2 2.3 1.2 .70 .50 .50 7.7 6.8 5. 4 3.1 3.2 2.4 1.1 .70 .50 .50 .50 .60

16 6.2 6.2 5.2 2.9 3.3 2.3 1.3 .60 .50 13 6.0 5.9 5.0 2.9 3.3 2.1 1.2 .60 .40 .50 4.1 5.7 5.8 4.9 3.0 3.3 1.9 1.2 .60 " .40 .60

2.2 5.2 5.6 4.4 3.2 3.3 2.2 1.0 .60 .40 .50 146 5.0 5.5 4.4 3.2 3.1 2.3 1.2 .60 .40 .40 213 4.7 5.4 4.4 3.1 2.9 2.1 1.3 .60 .40 .40 70 .40 .40

.60 .70 4.3 2.9 2.2 .90 6.6 2.9 2.1 .80 5.4 2.9 2.1 .70

MEAN .40 .47 .51 MAX .90 4.5 2.5 .70 .80 MIN .30 2.9 1.9 .40 .30 AC-FT 199 139

213 MIN .30 AC-FT 3,760 SANTA ANA RIVER BASIN

11058500 EAST TWIN CREEK NEAR ARROWHEAD SPRINGS, CALIF.--CONTINUED

DISCHARGEt IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

NOV DEC JAN FEB MAR APR MAY JUN JUL 1 .60 60 1.2 4.3 8.2 4.0 7.6 18 T.4 5.1 3.0 3.4 2 .70 70 1.6 4.3 7.4 4.1 10 17 7.1 5.2 3.0 3.5 3 .BO 70 71 4 .80 .80 8.7 4.2 6.8 5.1 10 15 7.5 .9 2.7 3.1 5 .80 80 335 4.1 6.8 4.5 9.1 15 6.9 .8 2.8 2.7 6 .80 80 585 4.1 6.3 4.4 8.1 14 5.9 .8 2.9 2.4 7 .70 138 4.1 6.1 4.3 8.6 13 7.3 .6 3.0 2.3 8 .60 36 4.1 6.0 4.2 8.0 13 7.5 .4 3.0 2.2 9 .60 20 4.0 6.0 4.2 7.5 15 7.7 .3 2.8 2.3 10 .80 17 4.0 5.9 4.3 7.3 18 8.0 .2 3.1 2.3 11 .90 13 4.0 5.7 5.4 24 14 7.9 4.2 2.8 2.2 12 .80 11 4;0 5.5 10 15 13 8.2 4.1 2.9 2.2 13 .70 10 4.0 5.4 25 13 12 9.9 4.0 2.8 2.4 14 .50 9.1 3.8 5.2 19 12 11 7.9 4.1 2.8 2.0 15 .60 8.4 3.8 ' 5.0 11 11 11 7.0 4.1 2.8 1.9 16 .70 7.6 3.8 4.9 8.8 9.7 10 5.6 4.0 2.8 2.0 17 .60 7.2 3.6 4.8 8.4 9.2 10 6.9 3.9 2.7 2.1 18 .60 6.8 3.5 4.7 8.1 11 9.8 6.7 3.6 2.6 2.7 19 20 .60 6.0 3.2 4.6 7.4 15 10 6.1 3.7 2.7 2.3 21 .60 21 6.9 5.7 3.6 2.7 2.4 22 .60 5.4 15 4.4 6.7 35 8.8 6.0 3.6 2.7 2.6 23 .60 5.2 11 4.4 6.5 22 8.6 6.1 3.5 2.9 2.4 24 .50 5.0 67 4.3 6. 20 8.4 7.1 3.4 2.7 2.7 25 .50 4.8 36 4.2 6. 19 8.1 5.9 3.3 2.5 2.6 26 .50 4.7 15 4.1 6. 19 8.3 5.5 3.3 2.4 2.6 27 .60 4.6 13 4.1 6. 18 6.3 5.4 3.3 2.2 2.7 28 .60 4.5 11 4.0 6. 18 8.1 5.4 3.2 2.1 3.0 29 .70 4.4 9.8 6.6 18 7.9 5.3 3.2 1.9 2.6 30 .80 4.3 8.8 6.1 18 7.8 5.3 3.1 1.9 2.7 31 .90 4.3 9.1 TOTAL 20.70 4 40 1,351.7 277.7 151.1 226.1 426.0 355.9 202.2 123.7 83.3 76.7 MEAN .67 MAX .90 >.9 585 67 8.2 25 35 18 9.9 5.2 3.1 3.6 MIN .50 1.9 1.9 4C-FT 41 86 2,680 551 300 446

DISCHARGE, IN CUBIC FEET PER SECOND , MATER YEAR OCTO »ER 1967 TO SEPTEMBER 1968 DAY JUN JUL AUG SEP 1 .83 .77 .82 .66 2 2.1 .77 .75 .79 .67 3 2.) 1.9 5.2 3.9 3.0 2.3 3.3 2.3 .83 .76 .70 .75 4 .77 .74 .60 .77 5 2.5 1.9 4.7 3.6 2.9 3.2 2.9 2.5 .71 .69 .64 .72 6 .83 .76 .59 .68 7 2.1 .97 .90 .58 .65 8 1.9 1.9 3.2 3.1 3.1 29 3.6 2.4 .97 .91 .56 .65 9 1.9 1.9 3.0 3.3 3.4 8.4 2.6 2.1 .83 .79 .54 .64 10 1.8 .71 .67 .53 .64 11 1.8 12 1.6 1.8 3.0 3.2 3.1 4.3 2.7 3.5 .65 .56 .54 .69 13 1.8 .65 .56 .58 .66 14 15 1.3 .60 .67 .67 16 1.7 1.8 3.3 3.3 3.3 3.6 3.0 1.9 1.2 .60 .73 .67 17 1.6 1.2 .59 .77 .66 18 1.3 .63 .88 .69 19 1.2 .56 .60 .71 20 1.9 17 7.9 3.2 2.9 3.1 2.9 1.6 1.1 .56 .90 .71 21 .97 .55 .91 .73 22 .90 .55 .80 .66 23 .91 .57 . 8 .62 24 1.9 1.0 .53 . 4 .63 25 .90 .53 . 7 .61 26 1.8 4.3 4.8 3.2 2.1 2.6 2.3 1.5 .67 .63 . 2 .62 27 .82 .66 . 3 .61 28 1.9 4.8 4.5 .82 .79 .63 .67 29 1.6 1.5 .99 1.1 .64 .68 30 1.6 1 3 4.2 3.2 2.3 1.9 .63 . .81 1.0 .62 .71 31 1.7 .69 .63

MEAN 3.9' .90 .69 .67 .67 MAX 2.5 17 9.9 5.1 3.9 29 5.5 1.3 1.1 .91 .77 MIN 1.6 1.6 2.8 2.9 2.1 2.0 1.9 .83 .65 .53 .53 .61 AC-FT 118 226 292 209 SANTA ANA RIVER BASIN

110S8SOO EAST TWIN CREEK NEAR ARROWHEAD SPRINGS, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 NOV DEC JAN FEB MAR APR MAY JUN JUL 1 .1 7 .98 .7 57 100 21 17 6 .8 3.9 2 .1 8 .92 .7 52 87 20 17 6 .8 3.7 3 .7 7 .93 .7 36 78 31 17 6 .7 3.7 * .« 0 .97 .7 30 70 21 21 6 .4 3.7 5 8 .97 .7 39 65 23 19 6 .4 3.7 6 .( 1 .95 7 .e 9 .88 .6 64 60 20 19 5 '.5 4.1 a .e 9 .83 .7 33 55 19 18 3 .5 4.0 9 .6 6 .85 .7 28 50 19 17 2 .6 4.0 10 .<-. 3 .81 .6 26 53 18 17 2 4.5 3.8 11 .1 2 .79 .8 26 47 8 17 3 4.4 3.7 12 .'. 4 .87 .7 27 44 7 17 2 4.4 3.8 13 .<> 3 .95 .4 24 42 8 17 1 4.4 3.9 14 .<, 9 .0 1 20 38 8 16 0 4.4 4.0 15 .<, * .5 .4 31 35 7 16 0 4.3 3.6 16 ,1 5 .4 .7 33 33 8 16 1 4.2 3.7 17 .8 3 .2 .1 30 31 7 16 c 4.2 3.6 IB .E 5 .1 .0 38 31 7 16 9.7 4.2 3.5 19 6 .98 43 30 7 16 9.5 4.1 3.5 20 8 .93 39 28 7 16 9.3 4.0 3.5 2\ 3 .94 37 31 17 15 9.5 3.9 3.4 22 1 .96 40 28 17 15 9.4 3.9 3.4 2* 0 .92 151 26 17 15 8.8 3.7 3.4 24 7 .0 386 24 17 15 8.9 3.7 3.4 25 7 .1 5 795 22 17 16 8.9 3.6 3.3 26 9 .2 2 259 22 17 15 8.4 3.9 3.3 27 8 .2 1 169 21 16 15 8.1 3.8 3.3 28 1 .2 125 21 16 15 8.0 3.9 3.3 29 3 .2 2! 17 15 7.7 4.0 3.3 30 .f 5 .2 21 17 16 7.5 4.0 3.2 31 2\. ______15 MEAN 8.7 18 130.8 108.8 MAX )9 1.5 540 795 100 31 21 16 4.8 4.1 MIN .( 6 .79 1.6 20 21 16 15 7.5 3.7 3.2

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 DAY OCT NDV DEC JAN FE8 MAR APR MAY JUN JUL AU6 SEP

1 3.3 2.8 2.9 4.2 2.1 21 3.0 2.7 1.4 1.2 1.1 .0 2 3.5 2.9 3.7 4.3 2.1 16 3.0 2.6 1.4 1.1 1.0 .1 3 3.6 2.9 2.9 4.2 1.9 13 2.9 2.6 1.4 1.1 1.0 .1 4 1.1 .1 5 .99 .2 6 .99 1.1 7 .97 1.1 8 .98 1.1 9 1.0 1.0 10 .99 .98 11 3.4 2.8 3.0 4.3 12 7.1 2.9 2.8 1.3 1.1 1.0 .84 12 .91 13 1.0 .99 14 .98 .99 15 3.4 2.9 3.0 3.8 3.0 5.5 3.1 2.1 2.1 1.2 .98 1.1

17 .88 18 .99 .87 19 1.0 .81 20 3.2 2.4 3.1 3.1 3.0 4.6 2.8 2.3 1.7 1.1 1.0 .83 21 .99 .86 22 3.2 2.6 3.2 2.9 2.4 4.3 3.6 2.1 1.3 1.1 1.0 .88 23 1.0 .84 24 2.8 2.6 3.9 2.9 2.5 3.B 2.9 2.1 1.3 1.2 1.1 .85 25 3.0 2.8 4.6 2.9 2.4 3.5 2.8 1.9 1.3 1.2 1.0 .95

27 1.1 1.0 2B 1.1 .94 29 2.7 2.7 3.8 2.4 3.0 3.0 2.0 1.3 1.1 l.D .93 30 1.0 .96 31 2.7 4.2 2.1 3.1 1.5 1.1 1.0

MEAN 3.21 3.03 3.34 3.58 3.30 6.65 3.01 2.35 1.57 1.16 1.01 .97 MAX 1.1 1.2 KIN 2.7 2.3 2.9 2.1 1.9 3.0 2.8 1.5 1.2 1.1 .97 .81 AC-FT 198 180 205 220 1B3 409 179 144 93 71 62 58 CAL YR 1969 TOTAL 7,590.70 MEAN 20.8 MAX 795 MIN 1.6 AC-FT 15,060 HTR YR 1970 TOTAL 1.009.86 MEAN 2.77 MAX 21 MIN .81 AC-FT 2.00D SANTA ANA RIVER BASIN

11058600 WATERMAN CANYON CREEK NEAR ARROWHEAD SPRINGS, CALIF. LOCATION.--Lat 34°11'36", long 117°16'25", in NEVNWVNWV sec.11, T.I N., R.4 W., San Bernardino County, on left

DRAINAGE AREA.--4.65 sq mi.

45.46 ft ent datu AVERAGE DISCHARGE.--52 years (1912-14, 1920-70), 2.65 cfs (1,920 acre-ft per year); median of yearly mean di charges, 1.6 cfs (1,200 acre-ft per year). EXTREMES.--Ma mums and minimums (discharge in cubic feet per second, gage height in feet), ual maximum discharge (*) and peak discharges above base (35 cfs), water year Date Time Disch. G H. Date Time Disch. G.H. ate Time Disch. G.H. Nov. 23, 1965 0200 548 4 44 Mar. 13, 1967 2000 64 2.86 an, 25, 1969 1545 *1,160 5.53 Dec. 9, 1965 2300 55 2 80 Apr. 11, 1967 0545 36 2.67 eb. 6, 1969 0615 145 3.26 Dec. 29, 1965 1730 *876 5 06 eb. 15, 1969 2000 72 2.91 Nov. 19, 1967 1215 110 3.08 eb. 25, 1969 0700 926 5.13 Nov. 7, 1966 1930 55 2 80 Nov. 30, 1967 1315 54 2.76 pr. 3, 1969 0030 128 3.14 Dec. 3, 1966 0700 182 3 41 Mar. 8, 1968 OSOO *235 3.55 Dec. 6, 1966 1730 *755 4 82 Nov . 7 , 1969 0145 *38 2.60 Jan. 24, 1967 2015 295 3 80 Jan. 21, 1969 0745 140 3.24 A m daily di ge, water years 1966-70 Wtr yr Date Discharge Wtr yr Date Disc harge 1966 S everal days 0 1969 Oct. 27, 1968 .25 1967 do. .20 1970 Sept. 28, 1970 .36 1968 Aug. 12, 1968 .23 Per iod of rec ord : Maximum discharge, 2,350 cfs Mar. 2, 1938, based on rainfall-runoff stud ies; no flow at times in most years. REMARKS . - -Records good. No gage-height reco rd Aug. 22 to Sept. 30, 1968. No regulatio n above st ation. One this report. REVISIONS (WATER YEARS). --WSP 1315-B: 1922(M), 1927(M), 1933(M). WSP 1928: Drainage

DAY JUL AUG SEP 1 .10 0 4.2 9.2 2.9 2.9 1.8 .4 1.1 .50 .20 .20 2 .10 3.9 8.6 2.7 3.0 l.B .2 1.0 .50 .20 .20 3 .10 ) 3.4 8.0 2.7 2.9 l.B .0 1.0 .50 .20 .10 4 0 ) 3.4 7.7 2.7 2.7 i.e .0 .90 .40 .20 .10 500 3.2 7.4 2.6 2.7 1.7 .1 .90 .40 .20 .10 6 .10 . 0 3.1 7.4 6.1 2.6 l.B .1 .BO .40 .10 .10 7 .10 . 0 2.8 7.1 5.4 2.5 1.8 .0 .90 .40 .20 .10 8 .10 .0 2.7 6.8 4.6 2.4 l.B .3 1.0 .40 .10 .10 9 .10 . 0 8.8 6.5 4.0 2.3 1.8 .6 1.1 .40 .10 .10 10 .10 . 0 7.1 5.8 4.0 2.3 1.9 .6 .90 .40 .10 .10

11 .10 1.9 .6 .80 .30 .10 .10 12 .10 2.2 1.9 .4 .70 .30 .10 .10 13 .10 . 0 4.2 5.0 3.6 2.2 1.8 .2 .60 .30 .10 .10 14 .10 .30 4.8 5.0 3.4 2.1 1.7 .2 .50 .30 .10 .10 15 .10 .1 4.6 5.0 3.3 2.1 1.6 .2 .50 .30 .10 .10 16 .10 .4 4.4 5.0 3.3 2.1 1.6 .2 .50 .30 .10 .10 17 .10 1 4.0 5.0 3.3 2.0 1.8 .2 .50 .20 .10 .10 18 .10 .0 3.8 5.0 3.3 2.0 2.0 .1 .50 .20 .10 .10 19 .10 .8 3.6 4.8 3.2 1.9 2.1 .0 .50 .20 .10 .20 20 .10 .3 3.2 4.6 3.2 1.9 l.B .0 .50 .20 .10 .20 21 .10 .1 3.2 4.4 3.1 1.8 1.6 .0 .50 .20 .10 .ID 22 .10 10 3.3 4.0 3.1 l.B 1.5 .1 .60 .20 .10 .10 23 0 6 3.1 3.8 3.1 1.8 1.3 .1 .60 .20 .10 .10 24 0 3 3.0 3.4 3.1 3.7 1.3 .1 .60 .20 0 .10 25 0 2 2.9 3.3 3.1 2.8 1.3 .1 .60 .20 0 .10 26 0 1 2.8 3.3 3.1 2.4 1.3 .1 .60 .20 0 .10 27 0 .1 .50 .20 .10 .10 28 0 .8 2.7 3.2 2.9 2.2 1.4 .1 .50 .20 .10 .10 29 0 .6 69 3.2 2.1 1.5 .2 .50 .3D .10 .30 30 o .4 13 4.0 1.9 1.5 .1 .50 .3D .1C .30 31 0 ___ 1 1 3.1 1.8 .1 .20 .10 -

TOTAL 2.00 299.90 202.0 163.6 96.5 71.6 50.3 3 20.70 9.30 3.40 3.80 MEAN .065 0.0 6.52 5.28 3.45 2.31 1.68 1 18 .69 .30 .11 .13 MAX .10 106 69 9.2 6.1 3.7 2.1 .6 1.1 .50 .20 .30 MIN 0 0 2.7 3.1 2.6 1.8 1.3 .0 .50 .20 0 .10 &C-FT 4.0 595 401 325 191 142 100 72 41 18 6.7 7.5 SANTA ANA RIVER BASIN

11058600 WATERMAN CANYON CREEK NEAR ARROWHEAD SPRINGS, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 .30 .20 .50 3.1 5.5 3.3 7.3 2 .30 .30 3 .50 .30 25 3.0 5.3 3.3 6.1 6.5 5.1 3.1 1.6 1.7 4 .40 6.B 5.1 3.2 1.6 1.6 5 .60 .40

6 .30 .40 219 2.8 5.1 3.2 6.6 6.4 4.8 3.1 1.6 1.3 7 .30 6.0 34 2.7 5.0 3.2 8.7 6.1 4.B 3.0 1.7 1.3 8 .20 1.6 9 .20 1.1 10 .40 l.C

11 .40 .90 7.3 2.5 4.6 4.6 15 6.7 5.1 2.5 1.4 1.1 12 .40 .60 7.1 2.5 4.5 13 9.7 6.2 5.6 2.5 1.3 1.2 13 .40 .80 6.7 2.4 4.4 23 8.9 6.1 7.3 2.5 1.3 1.2 14 .20 5.9 5.4 2.5 1.3 1.3 15 .30 .70 6.1 2.3 4.4 11 8.6 5.7 4.8 2.4 1.4 .96

16 .30 .70 17 .30 .70 5.6 4.7 2.4 1.4 l.C 18 .20 .60 19 .20 .60 20 .20 .60

21 .30 .70 4.4 1.9 3.8 6.1 9.9 5.1 3.8 2.1 1.2 1.2 22 .30 .70 4.2 8.9 3.7 5.5 13 5.1 3.B 2.1 1.2 1.2 23 .20 .60 24 .20 .60 3.8 3B 3.6 5.6 9.7 5.3 3.6 2.1 1.2 1.3 25 .20 .60 3.7 21 3.8 5.5 8,3 5.4 3.5 2.1 1.2 1.3 26 .30 .60 27 .30 .60 28 .30 .60 29 .30 .60 3.3 6.5 5.8 7.7 5.7 3.1 1.8 .97 1.5 30 .30 .50 3.2 6.1 '- 5.3 7.3 6.0 3.1 1. 1.1 1.4 31 .30

TOTAL MEAN .30 .83 MAX .60 6.0 218 38 5.5 23 15 7.7 7.3 3. 1.7 1.7 MIN .20 .20 .50 1.9 3.4 3.1 6.1 5.1 3.1 1. .97 .94 372 ?68 14 84 76

3 }

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TD S&PTEMBER 1968

DAY DCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .3 .85 .1 1. 1.8 1.5 9.B .2 .75 .77 .34 .60 2 .2 .90 .0 1. 1.8 1.5 3.4 .3 .65 .72 .38 .60 3 .2 .91 .8 2. 1.7 1.4 2.0 .4 .64 .60 .37 .60 4 .3 5 .3 1.0

6 .1 1.0 .6 1.8 1.5 2.0 1.9 .4 1.0 .64 .31 .60 7 .0 .98 .5 1.8 1.5 3.4 1.8 .3 1.1 .69 .29 .60 8 .96 .98 .5 1.8 1.5 21 1.7 .4 1.2 .50 .26 .60 9 .94 .98 .5 1.8 1.6- 4.7 1.7 .3 1.0 .41 .25 .60 10 .87 1.0 .5 1.8 1.8 3.2 1.6 .4 .87 .35 .24 .60

11 .86 .96 12 .84 .96 .5 1.7 1.6 2.7 1.7 .9 .72 .29 .23 .50 13 .83 .92 .5 1.7 2.8 3.2 1.7 .0 .71 .34 .30 .50 14 .82 .93 .5 .71 A* .39 .50 15 16 .80 .98 .6 1.7 1.8 2.1 1.7 .3 .62 .42 .46 .50 17 .78 1.0 .6 1.7 1.8 3.2 1.7 .2 .62 .33 .49 .50 18 .81 1.0 .7 1.7 1.8 2.2 1.7 .1 . 1 .29 .42 .50 19 .84 14 .4 1.7 1.7 2.1 1.7 .0 . 8 .27 '.39 .50 20 .84 14 .7 1.7 1.7 1.9 1.7 21 .95 4.6 .5 1.7 1.7 1.8 1.7 .1 . 2 .24 .57 .50 22 .2 . 8 .24 .60 .50 23 .96 1.9 .4 1.6 1.7 1.8 1.6 .1 . 3 .24 .60 .50 24 .96 1.7 .4 1.6 1.6 1.8 1.6 .1 .61 .25 .60 .50 25 .96 1.6 .2 1.6 1.5 1.7 1.5 .0 .60 .27 .60 .50

26 .99 J.5 .1 1.7 1.5 1.7 1.4 .87 .62 .26 .60 .50 27 28 .98 1.5 .0 2.b 1.5 1.6 1.3 29 .94 1.5 .9 2.1 1.5 1.6 1.3 .78 .97 .48 .60 .50 30 .91 10 .0 2.0 1.6 1.3 .87 .89 .40 .60 .50 31 .85 .0 2.0 4.7 . 84 .37 .60

TOTAL 29.84 MEAN .96 2.45 2.03 1.87 1.72 2.83 1.97 .22 .73 .*! .43 .53 MAX 1.3 14 4.7 3.7 2.8 21 9.8 2.0 1.2 .77 .60 .60 MIN .78 .85 1.4 1.6 1.5 1.4 1.3 .75 .48 .24 .23 .50 SANTA ANA RIVER BASIN

11058600 WATERMAN CANYON CREEK NEAR ARROWHEAD SPRINGS, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND* WATER YEAR OCTOBER 196B TO SEPTEMBER 1969 JUL AUG SEP 1 .45 .45 .53 .67 16 80 16 9.2 5.6 3.8 2.9 l.B 2 .45 .44 .50 .66 14 65 17 9.1 5.6 3.6 2.7 l.B 3 13 61 3B 9.1 5.4 3.6 2.6 1.7 4 .45 .49 .46 .64 12 55 30 11 5.4 3.5 2.6 1.7 5 .38 .53 .48 .63 16 47 29 9.9 5.4 3.7 3.0 1.7 6 .35 .4B .50 .61 36 44 2B 11 5.2 3.B 2.B 2.1 7 IB 41 26 9.9 5.0 3.8 2.8 1.9 8 . 3 .41 .50 .68 17 3B 24 9.3 5.0 3.6 2.9 1.7 9 . 8 3.6 2.9 1.8 ia . 1 3.4 2.8 1.7 11 . 3 .38 .57 .67 13 33 IB B.O 5.5 3.3 2.9 1.7 12 . 0 .45 .56 .65 13 30 16 B.O 5.4 3.4 2.B 1.6 13 . 9 .49 .56 1.7 12 2B 15 8.0 5.1 3.2 2.7 1.6 14 .47 .51 .56 5.5 12 2B 13 B.O 5.0 3.1 2.6 1.6 15 .42 .B5 .59 1.3 23 27 12 7.7 4.9 3.2 2.6 1.7 16 .35 .76 .76 1.0 15 26 11 7.4 5.0 3.1 2.6 1.8 17 .31 .67 .65 ,B6 12 26 10 6.B 5.2 3.2 2.6 1.8 IB .31 .64 .63 1.0 17 25 10 6.B 4.9 3.0 2.5 1.7 19 .32 .5B .67 6.5 16 24 10 6.B 4.6 3.0 2.5 .7 20 .34 .53 .74 23 15 21 .38 .51 .73 29 14 23 9.7 6.B 5.2 3.1 2.3 .B 22 .35 .53 .73 32 15 23 .32 .47 .74 9.9 59 22 9.7 6.5 4.B 3.0 2.2 .7 24 .29 .51 .62 34 191 21 25 .33 .52 3.2 438 590 20 9.6 6.0 5.2 2.9 2.1 1.5 26 .31 .45 3.2 13B 159 20 9.B 5.B 4.B 3.0 2.C 1.5 27 .25 .45 1.1 52 110 9 9.4 5.8 4.4 3.1 2.0 1.5 28 .27 .44 . 8B 29 90 29 .29 .45 .81 24 B 9.2 5.6 4.1 2.9 1.9 1.5 3C .39 .46 .78 22 7 9.1 5.6 4.0 2.9 l.B 1.5 31 .42 .73 IB 0.9 76.7 50.7 MEAN .37 .50 .BO 2B.2 55.2 32.0 15.7 7.60 5.02 3 .25 2.47 1.69 MAX .47 .85 3.2 438 590 BO 3B 11 S.6 3.8 3.0 2.1 12 16 9.1 5.4 4.0 2.9 l.B 1.5 200 152 101 MIN .23 AC-FT 809

DISCHARGE, IN CU 3IC FEET PER SECOND . WATER YEAR OCTOBER 1969 TO SEPTEMBER 1973 DAY 3CT NOV DEC .6 1.6 1.9 2.2 1.1 12 2.5 1.9 .6 67 .42 .46 .8 1.6 l.B 2.2 1.1 10 2.4 1.8 .5 67 . 2 .46 .9 1.6 l.B 2.2 1.1 4.8 2.4 1.8 .4 64 . 1 .51 .8 1.6 l.B 2.3 1.1 6.4 2.3 1. .4 61 .6 .50 .7 1.7 1.8 2.4 1.0 7.1 2.2 1. .4 61 . B .46 6 .6 7.0 l.B 2.3 1.0 4.7 2.2 1. .3 61 . B .46 .6 7.B l.B 2.3 . 9B 4.3 2.1 1. .3 57 . B .51 B 4.1 9 10 .7 2.4 2.0 4.4 7.7 4.7 2.1 l.B .2 56 . 8 .42 11 .6 55 . B .43 12 .6 2.2 2.0 1.8 1.4 4.0 2.0 1.8 .1 54 . 2 .52 13 .6 2.1 2.0 1.5 1.3 3.9 1.9 1.8 .1 51 . 2 .62 14 .6 51 .2 .65 15 2.0 1.3 1.9 1.7 .99 51 . B .65 16 .7 2.3 2.0 1.5 1.2 3.5 54 .42 .58 17 .B 2.1 2.0 IB .B 1.9 2.2 1.3 1.1 3.2 2.1 1.7 .96 51 .42 .54 19 .8 1.9 2.2 1.2 1.1 3.1 2.1 1.6 .93 51 .42 .55 20 .7 2.0 2.2 1.2 1.1 3.1 2.0 1.6 .90 51 .42 .56 21 .7 2.0 2.2 1.2 1.1 3.1 l.B 1.5 .90 51 .46 .55 22 .B 23 .B 1.8 2.3 1.2 1.1 2.9 2.4 1.5 ,B4 46 .43 .39 24 .8 l.B 2.3 1.2 1.1 2.8 2.3 1.4 .B3 46 .42 .43 25 .9 l.B 2.2 1.2 1.1 2.B 2.1 1.4 .79 45 .46 .37 26 .B 1.8 2.3 1.2 1.1 2.7 1.9 1.4 .77 42 .46 .37 27 .B 1.8 2.3 1.2 1.1 2.7 1.9 1.4 .73 42 .46 .39 2B .7 1.8 42 .46 .36 29 .6 1.8 2.2 1.1 "mi 2.5 2.1 1.7 .71 42 .46 .41 30 .6 1.9 2.2 1.1 2.5 2.0 1.6 .67 45 .51 .44 31 .6 TOTAL 5 MEAN 1 71 52 .42 .48 MAX .9 7.B 2.3 4.4 7.7 12 2.5 1.9 1.6 67 .51 .65 MIN .6 1.6 1.8 1.1 .98 2.5 l.B 1.4 .67 42 .38 .36 SANTA ANA RIVER BASIN 17

11059000 WARM CREEK FLOODWAY AT SAN BERNARDINO, CALIF. LOCATION.--Lat 34°OS'45", long 117°16'30", in San Bernardino Grant, San Bernardino County, on left bank 0.4 mile

DRAINAGE AREA.--47.8 sq mi. PERIOD OF RECORD.--January 1961 to September 1970. GAGE.--Water-stage recorder. Altitude of gage is 1,000 ft (from topographic map). Prior to Dec. 21, 1967, at

XTREMES.--Maximums and minimums [discharge in cubic feet per second, gage height in feet) for the water years 1966-70 are contained in the f ollowi ng table: Maximurn Min ifflum tr yr Date Discharge G.H. Date Discharge 966 Nov. 23, 1965 2,400 3.10 Most of time 0 967 Dec. 5, 1966 5,390 7.25 do . 0 968 Mar. 8, 1968 505 3.75 do. 0 969 Feb. 25, 1969 9,600 6.75 do. 0 970 Nov. 7, 1969 1,390 4.50 do. 0 Period of record: Maximum discha rge, 9,600 cfs Feb. 25 , 1969 (gage height, 6.75 ft) , from ra ting curve

EMARKS.-- Records poor. Flow par tly re gulated by percolation basin elsewhere in this report

1 0 0 C 12 2.7 0 0 0 2 0 0 0 4. 0 .70 0 0 .40 3000 3. 3 .20 0 0 0 * 0 0 0 2. 7 .10 0 0 3 5000 2. 7 .10 C 0 0 6000 3. 3 75 0 0 0 7000 3. 3 101 0 0 0 8000 5. 6 22 C 0 0 90 0 97 2. 8 4.8 0 0 0 10 0 0 51 4. 0 1.0 0 0 J 11 0 0 4.8 6. 50 0 0 0 12 0 0 16 5. 60 0 0 0 13 .70 0 13 3. 3 .10 C 0 0

6 .30 109 .70 15 .70 0 0 0 7 0 ltd .20 12 0 0 .20 0 8 .40 20 .10 3. 60 0 0 0 9 0 1.8 .70 7. 50 C .30 0 0 0 1.4 1.8 3. 10 0 0 0 1 0 .70 .70 7. 5 .10 0 Q 0 2 0 619 15 7. 50 0 0 0 3 0 230 1.1 7. 5 0 .10 0 0 4 0 58 1.2 7. 5 0 64 0 0 5 .80 77 1.0 6. 5 0 1.0 0 0 6 .30 4.0 0 6. 50 0 0 0 70 2.2 0 6. 50 0 0 0 8 0 1.4 0 6. 50 0 0 0 9 0 .20 266 4. 0 0 0 0 0 0 0 77 186 0 0 0 1 0 47 7. 5 0 0

.50 0 0 .40 0 0 AN .10 40.8 20.1 11 .7 7.49 2.10 .017 0 0 .013 o o X .80 619 266 1 86 101 64 .30 0 0 .40 o o N 000 . 80 0 0 000 0 o a SANTA ANA RIVER BASIN

11059000 WARM CREEK FLOODWAY AT SAN BERNARDINO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET P R SECOND, WATER YEAR OCTOBER 1966 TO StPTEMBER 1967 NOV DEC JAN FEB MAR APR MAY JUN JUL

1 0 C .13 C C 2 5.6 C 2 038 .4 0 0 1 4.8 0 3 7.3 0 655 0 0 .8 4.0 0 4 4.6 0 * .4 0 -14 1 4.0 0 5 .40 0 1,660 0 f 1 3.3 0

6 .60 C 2,360 0 C .2 2.7 0 7 0 280 384 0 0 .0 3.0 0 e 0 27 2 .7 0 0 .6 3.3 0 9 0115 .3 0 C 1 2 3.0 0 lu 8.9 4.8 1 .4 0 0 .6 2.6 0

11 0 .40 1 .4 0 0 16 2.2 0 12 0- 0 .70 0 5.7 .8 1.8 .40 13 0 C .70 0 83 .5 1.4 6.5 1* 002 .2 0 73 .5 .80 2.7 15 0 .20 2 .2 0 12 .8 .20 1.4

16 001 .8 0 3.3 .8 .20 .70 17 001 .8 0 .40 .3 .10 .40 18 0 0 .70 0 0 2 .10 .20 19 0 .10 0 0 C g .10 0 20 000 0 0 2 .10 .10

21 0 .10 0 0 0 17 0 0 22 0 12 C 171 0 22 0 0 23 0 2.7 0 68 0 .8 0 0 24 0 2.2 0 814 u .8 0 0 25 0 1.8 0 12 C 6 0 0

26 0 1.8 3 .4 3.3 0 .5 0 0 27 0 1.8 0 2.2 0 .8 0 0 28 0 1.8 0 1.0 0 .3 .30 0 29 0 .20 0 0 0 .6 3.0 0 30 000 .30 0 0 C 31 0 0 .50 13 .10

0 204.40 .0 46.70 12.40 0 2.50 EAN .70 11.6 164 35.2 0 6.59 2 .0 1.51 .41 0 .083 AX 8.9 280 2, 360 814 0 83 23 5.6 6.5 0 1.0 IN . 0 0 C 0 0 0 .0 0 0 0 0 405 93 25 0

DISCHARGE, IN CUBIC FEET PER SECONDi WATER YEAR OCTOBER 1967 TO SEPTEM JER 196

AY JUL

0 2 .6 .10 .60 0 20 0 0 0 0 1 .2 .90 0 0 35 0 0 0 0 .40 .90 0 C 1.8 0 0 0 0 .20 0 0 .20 1.8 0 .50 0 C 0 0 0 0 .40 0 .80 0

0 0 0 0 7.2 .10 0 0 0 C .70 0 0 13 0 0 0 0 0 1 .0 0 0 113 0 0 0 0 0 0 0 .60 3.8 0 .40 0 .10 1 C .40 0 .20 2.6 0 0 0 0

0 .20 .40 0 1.0 0 0 0 0 0 0 0 0 1.0 0 .50 0 0 0 0 0 5.1 1.2 0 .80 0 0 0 0 0 .80 .80 .10 0 0 j 0 0 0 .40 .50 0 0 0 0

0 0 0 .10 .50 0 0 0 0 0 0 0 0 .10 .90 0 0 .10 0 0 0 0 .40 0 0 C 0 30 0 0 0 .10 0 0 0 0 64 0 0 0 0 0 0 C 0

24 2 .0 D 0 0 0 0 C 0 5.0 1 .2 0 0 0 0 .30 0 0 2.6 1 .0 0 0 0 0 0 0 0 1.8 .50 0 0 0 0 0 0 0 0 .30 .10 0 0 0 0 0 0

0 .20 .20 0 0 0 0 0 0 0 .20 12 0 0 0 .90 0 0 1.6 .10 2.6 0 0 0 1.2 0 2.3 0 .10 1.4 0 0 0 .50 0 0 21 .10 .BO 0 0 0 0 0 .10 1.0 0 0

D AL 0 150.0 12 .50 20.40 7.80 145.40 60.10 4.60 1.30 2.50 1.50 2.40 E N 0 5.00 .40 .66 .27 4.69 2.00 .15 .043 .081 .048 .080 A 0 64 2.6 12 5.1 113 35 1.2 .80 2.3 .90 .50 [ 0 0 0 0 0 0 0 0 0 0 C-FT 0 29B 25 40 15 288 119 9.1 2.6 5.0

TR YR 1968 TOTAL 40B.50 MEAN 1.12 MAX 113 MIN 0 AC-FT f 10 SANTA ANA RIVER BASIN

110S9000 WARM CREEK FLOODWAY AT SAN BERNARDINO, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET. PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

NCV DEC JAN FEB MAR APR MAY JUN JUL

5.7 7.0 5.3 7.0

3.1 2.0 1.5 2.6

.53 .25 .10

21 0 .16 0' 252 12 19 11 0 22 000 265 BO 15 11 0 23 000 30 364 15 10 0 24 000 357 987 12 10 0 25 0012 1,670 5,060 12 8.6 0

26 .02 0 40 693 1,030 9.7 9.2 0 27 0 .18 2.4 108 - 360 8.0 9.2 0 28 .07 0 2.2 98 351 12 8.6 0

0

MAX .20 2.2 40 - o MIN 0 0 0 0 1.5 8.0 6.5 0 0

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

NOV DEC JAN FEB . MAR APR MAY JUN JUL

8.6 5.3 2.0

0

7.84 n MEAN .27 9.87 0 4.19 12. 8 34.3 .26 .35 5.0 MIN 0 0 0 0 0 0 AC-FT 17 587 0 257 713 2.110 SANTA ANA RIVER BASIN

11059300 SANTA ANA RIVER AT E STREET, NEAR SAN BERNARDINO, CALIF. LOCATION.--Lat 34°04'OS", long 117°17'36", in San Bernardino Grant, San Bernardino County, south of San Bernardino. DRAINAGE AREA.--532 sq mi.

PERIOD OF RECORD.--March 1939 to September 1954, October 1966 to September 1970. GAGE.--Water-stage recorder. Altitude of gage is 970 ft (from topographic map). Prior to Nov , 10, 1950, water- stage recorder on right bank at datum 10.00 ft higher. Nov. 11, 1950, to Sept. 30, 1954, w iter-stage record- ers on both banks at datum 10.00 ft higher.

AVERAGE DISCHARGE.--15 years (1939-54), 12.5 :fs (9,050 acre-ft per year); median of yearly mean discharges, 6.9 cfs (5,000 acre-ft per year).

EXTREMES. --Max!mums and minimums (di scharge in cubic feet p er second, gage height in feet).

Annual maximum discharge (*) and peak discharges above base (400 cfs), water years 1967-70 Date Time Di sch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 7, 1966 2000 491 4.22 Mar. 8, 1968 0800 *1,110 6.37 Feb. 6, 1969 6,000 Dec. 6, 1966 2330 *18 ,000 10.05 Feb. 25, 1969 1130 *28,000 11.9 Jan. 24, 1967 2200 4 ,000 Dec. 26, 1968 1030 790 5.52 May 6, 1969 1200 1,350 9.70 Apr. 22, 1967 0400 1 ,350 6.70 Jan. 14, 1969 0930 1,990 5.96 Jan. 21, 1969 1400 10,300 6.50 Nov. 7, 1969 0300 *1,280 9.80 Nov. 19, 1967 2200 500 6.90 Jan. 25, 1969 1100 23,000 bl 3.S Mar. 2, 1970 0600 794 9.58 Mar. 5, 1970 0100 1,070 9.72 a From floodmarks.

Annua1 minim am daily di schar ge, water years 1967-70 Wtr yr D ate Discharge Wtr yr Da te Discharge 1967 July 13 , 1967 6.4 1969 Nov. 10 , 24, 25, 1968 13 1968 0ct. 16 , 1967, Feb. 25, 1968 9.7 1970 July 19 , 1970 12

Per iod of record: Maximum dis charge , 28,000 cfs Feb. 25, 1969; maximurn gage height, 16.50 ft (present datum) Jan. 23, 1943, discharge u i but was p robab ly less than 8,C 00 cfs; no flow for many days pri or to 1967.

REMARKS . - -Recor regula ted by Big Bear Lake (see s tatio n 11049000). Natural flow of strearn affected by ground-water withdraw als and diversions for domestic us e and irrigation above stat ion. Efflu Santa Ana Ri

DAY OCT AUG SEP

1 26 10 12 12 15 11 14 10 13 10 10 15 2 25 10 12 12 15 11 25 10 15 10 10 15 3 21 10 730 13 15 11 15 10 15 10 10 13 4 22 10 15 13 15 15 20 10 14 1-0 10 13 * 3B 10 2.320 15 14 12 21 10 13 10 10 10 6 30 10 7,740 5 14 11 16 10 10 I 10 10 7 19 66 2.B40 5 14 11 13 10 10 1 1( B.S e6 17 16 407 5 14 11 12 10 10 1 1 6.5B.5 9 15 17 132 5 14 11 11 10 11 .0 1 10 10 21 14 21 5 14 10 10 10 14 .0 .0 10 11 15 13 17 16 13 10 100 9> 16 .0 .0 10 12 13 13 16 16 13 10 65 9. 20 .5 .0 4.5 13 13 12 16 16 13 40 0 9, 21 .4 .0 B.5 14 13 14 16 16 13 25 2 9 B 24 1 .0 12 15 13 14 16 16 13 20 0 ' 22 .0 .0 10 16 13 13 16 16 12 16 0 6. 21 .0 .0 6.0 17 12 13 15 IB 12 14 5 B. 15 .0 .0 7.0 IB 12 15 15 19 12 13 32 B. 15 .0 .0 B.S 19 12 16 15 15 12 13 76 6. 15 .0 .0 B.O 20 12 11 15 15 12 13 36 B. 10 .0 .0 6.0 21 12 13 15 15 12 12 146 B. 10 .0 .0 9.0 22 12 14 15 36 12 12 21B B. 9.5 .0 .0 B.O 23 12 13 13 90 12 12 26 6. 9.0 .5 15 11 24 12 12 12 1.000 12 12 21 6* 6.0 .0 11 7.5 25 12 11 12 100 12 11 20 6. 9.0 .0 10 10

26 10 12 12 25 11 11 IB 9> 10 .0 10 9.0 27 10 12 12 20 11 11 15 9. 10 .0 10 8.0 26 10 15 12 IB 11 10 13 9, 10 .0 10 11 29 10 14 12 16 10 11 9. 10 .0 9.0 10 30 10 13 12 15 20 10 10 10 .0 12 13 31 10 12 15 16 14 It 1.223 290. 399.5 261.4 309.0 296.0 MEAN 15.5 MAX 36 66 7,740 1.000 15 40 218 1 24 10 15 15 M1N 10 10 12 12 11 10 10 B. 6.0 6.4 9.0 7.0 AC-FT 956 912 28,610 3.290 41.0BO

NOTE. NO GAGE-HEIGHT RECORD OR STAGE-DISCHARGE RELATION INDEFINITE SANTA ANA RIVER BASIN

11059300 SANTA ANA RIVER AT E STREET, NEAR SAN BERN.ARDINO, CALIF. --CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

6 13 15 14 U 21 13 13 13 15 15 16 7 11 14 19 11 32 12 13 15 15 14 16 8 1C 17 19 9 10 17 20 U 24 12 13 12 21 16 16 10 10 18 24 12 13 11 13 14 14 14 16 11 10 18 25 12 13 13 13 13 14 12 16 12 10 12 33 15 13 13 13 14 15 12 16 13 11 13 28 18 13 14 16 15 16 12 16 1* 13 14 18 13 13 23 18 15 13 12 16 15 11 14 14 12 13 15 22 15 16 12 15 16 9. 7 14 20 11 14 28 24 14 ia 14 16 17 11 14 23 11 14 15 25 17 16 15 15 18 11 16 40 11 13 14 16 17 16 14 15 19 11 140 42 11 14 14 15 15 16 16 15 20 11 130 24 11 14 13 16 16 16 17 15 21 17 BO 22 11 16 13 16 16 15 16 15 22 22 20 21 11 16 15 15 14 15 16 15 23 22 15 20 11 16 19 14 18 15 16 15 24 17 15 18 11 13 14 15 21 13 16 15 25 12 15 18 9.7 13 16 13 16 13 15 15 26 12 12 17 10 13 15 12 18 12 16 15 27 12 13 17 11 14 22 14 18 13 16 15 28 13 13 17 11 13 15 14 17 32 16 15 29 13 12 17 11 13 13 13 22 19 16 15 30 12 99 17 12 12 20 21 15 15 31 12 17 20 16 15 DTAL 385. 535 EAN 12. 4 27.6 20.3 15 7 11.6 23.4 17.8 15.4 15.6 16.1 14.8 15.4 AX Z 2 140 42 8 IS 293 50 25 22 32 17 16 IN 9. 7 12 12 3 9.7 11 11 12 12 12 12 13

NOTE NO 6 AGE-HEIGHT RECORD OR STAGE-DISCHARGE RELATION INDEFINITE APR . 1 TO JUNE 25.

AY oc T NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 16 16 14 50 1,600 500 470 325 194 102 40 2 16 16 15 45 1,300 7DO 560 350 185 98 39 3 16 16 15 36 1,100 720 630 370 178 96 38 4 16 178 96 37 5 16 16 16 100 450 600 800 365 180 95 36

6 16 16 16 900 330 7 16 325 182 91 190 8 16 15 16 80 290 510 714 315 184 86 170 9 16 16 14 60 280 480 670 305 186 80 140 1C 13 16 15 5C BOO 448 620 290 188 74 128 11 16 15 15 40 700 430 600 280 186 69 88 12 15 15 14 38 620 420 570 280 182 64 72 3 16 178 59 62 4 16 16 303 37 540 400 520 270 170 58 52 5 21 6 17 158 55 43 7 17 8 16 9 16 15 34 230 450 670 460 276 140 52 41 0 16 455 272 140 52 43 1 16 15 1,760 154 550 540 440 270 144 50 45 2 16 15 1,000 140 470 500 435 260 148 48 46 3 16 4 13 160 46 46 5 13 32 10,000 14,800 430 382 375 242 180 46 45 6 15 7 8 9 15 21 220 380 360 305 212 120 43 40 0 15 1 15 60 360 315 105 41 1,982 1,908 283 162 63.9 63.6 AX 21 101 10,000 14.800 1,600 750 800 374 194 102 190 IN 13 14 14 34 280 36D 305 204 105 41 36 C-FT 9: 0 932 1,220 41,090 71,300 33.820 31,200 31 ,260 16,840 9,950 3,930 3,780

11 ,910 13 AC-FT 246 ,300

NOTE. NO GAGE-HEIGHT RECORD JAN. 22 TO FEB. 17. STAGE-DISCHARGE RELATION INDEFINITE MAR. 1 TO SEPT. 30. SANTA ANA RIVER BASIN

110S9300 SANTA ANA RIVER AT E STREET, NEAR SAN BERNARDINO, CALIF.--CONTINUED

DAY OCT MOV DEC JUN J JL AUG SEP

i 32 14 15 13 17 297 17 14 14 4 14 2 29 14 16 13 17 342 16 14 14 3 13 3 25 14 17 13 17 190 15 13 14 4 14 4 23 14 17 14 16 5 20 14 17 14 16 263 15 14 14 3 13 6 19 120 17 14 16 40 15 13 14 5 13 7 18 164 17 14 15 26 15 13 13 4 14 8 17 60 17 14 15 25 15 14 14 4 13 9 16 35 16 14 15 10 14 25 16 40 25 68 15 13 13 4 14

11 14 21 16 30 8C 32 15 14 14 3 14 12 14 19 16 25 45 26 15 14 14 3 14 13 14 17 15 14 14 4 14 14 14 16 16 22 25 19 15 14 13 4 13 15 14 16 15 22 20 19 15 14 14 4 13 16 14 16 14 35 19 19 15 14 13 4 13 17 14 15 14 30 18 19 15 14 14 4 14 18 20 15 14 27 17 19 15 15 13 4 14 19 18 14 14 25 17 19 15 14 14 2 13 20 16 14 14 23 17 19 15 14 14 5 13

21 15 14 14 22 17 17 17 14 13 5 14 22 15 14 14 21 17 17 15 14 15 3 13 23 15 14 13 20 18 17 14 14 14 3 13 24 15 13 13 20 18 17 14 13 14 4 14 25 15 13 13 20 18 16 14 14 14 3 13

26 14 13 13 20 18 16 14 13 14 4 13 27 14 13 13 19 18 16 13 14 13 4 14 28 14 13 13 19 220 18 14 13 13 4 14 29 14 13 13 17 15 14 14 3 13 30 14 14 13 18 16 15 13 14 4 13 31 14 13 18 16 13 4 15 801 MEAN MAX 32 164 17 40 220 342 17 15 15 5 15 15 MIN 14 13 13 13 15 16 13 13 13 2 13 13 845 ,5 MIN 13 AC-FT 246,700 MIN 12 AC-FT 15,070

NOTE. NO GAGE-HEIGHT RECORD OR STAGE-DISCHARGE RELATION INDEFINITE FOR MOST OF YEAR. SANTA ANA RIVER BASIN

11060400 WARM CREEK NEAR SAN BERNARDINO, CALIF. LOCATION .--Lat 34 0 04'51", long 117°17'53", in San Bernardino Gra nt, San Bernardir o County, on right bank 265 ft tream fro m bridge ighway 395, 0 . 1 mi le downstr earn from Lytle Ci eek (east channel) , -and San Bernar dino. DRAINAGE AREA.--1 5.0 sq m i. PERIOD C F RECORD. --February 1964 to September 1970. GAGE.--K ater-stag e recorc er. Altitu de of gage is 975 ft (from t opographic map). AVERAGE DISCHARGE .--6 yea rs, 1.84 cfs (1,330 acre-ft p er year) . EXTREMES .--Maximums and m iniraums (di scharge in cubic f eet per se cond, gage height in feet) for the water years 1966-70 are co ntained in the foil owing table: Maximum Minimum Wtr yr Date Discharge G .H. Date Discharg e 1966 Mov. 22, 1965 606 6 .33 Most of time 0 1967 Dec. S, 1966 695 5 .75 do. 1968 «1ar. 8, 1968 350 t .98 do. 1969 Jan. 25, 1969 2,200 5 .55 do . 1970 Nov. 7, 1969 583 4 .48 do. 0 Pe riod of record: Maximum dis charge, 2,200 cfs Jan. 25, 1969 (gage height 5.55 ft) ; no flow for most of time in each year. REMARKS. 13- gram of Santa Ana Rive r basin els

DISCHARGE , IN CUBIC FEET PER SECOND, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1970

NOV. 14, 1965... 15 JAN. 24, 1967... 48 NOV. , 1969... 4. 0 15. 8.2 MAR. 4...... 4.7 21...... 7 . 3. 4 16. 56 14. .:...... 17 22...... 9 2. I 17. 5.3 31...... 4.7 24...... 12 3. : 22. 191 APR. 1...... 4.2 21 23. 65 2...... 1.7 26...... 1 38 24. 28 4...... 3.1 28...... 2 DEC. . 6. b 25. 25 FE! . 5...... 1 5. 4 DEC. 9. 32 18...... 1.3 6...... 12 2. 9 10. 21 19...... 7.3 15...... 1 . 1. 2 12. 5.3 22...... 14 18 ...... 3 1. 4 13. 8.9 AUG. 31...... 80 19...... 7 . 3. 6 14. 5.1 NOV. 22...... 1 80 29. 35 20...... 19 23...... 9 8. 1. 2 30. 1.1 21...... 14 24...... 15 9. 1. 5 31. 3.0 30...... 8.3 25...... 36 11. 1. 0 JAN. 30, 1966... 13 DEC. JL8...... 13 28...... 1 12. 2. 3 FEB. 6. 21 JAN. 27, 1968... 3.5 MAP .8 16. 1. 3 7. 14 MAR. 7...... 10 10...... 2 JAN. 10, 1970... 7. 3 8. .40 APF 11. 90 MAR. 24. 7.9 APR. i...... 7.2 .6 16. 11 25. .40 2...... 5.6 MAY .9 FEB. 10. 34 OCT. 3. .10 17...... 40 .6 11. 7. 2 10. 4.0 JULY OCT . 18...... 16 28. 37 NOV. 7. 44 DEC. 16...... ".20 25...... 2 MAR. 1. 50 DEC. 2. 5.3 26...... 3 2. 38 3. 95 25...... 3.6 27...... 86 4. 32 5. 177 26...... 8.7 28...... 18 5. 12 6. 50 JAN. 13, 1969... 20 29...... 0 10. 2. 8 26. .60 14...'...... 44 30...... 8 APR. 21. 1. 7 JAN. 22, 1967... 29 18...... 11 31...... 8 23. 21 19...... 17 NOV .8 MONTH CFS-DAYS MAXIMUM MINIMUM MEAN RUNOFF IN ACRE -FE E T NOVEMBER 1965.... 393. 5 191 0 13.1 78] DECEMBER 111. 4 35 0 3.59 22] CAL YR 1965.... 905. 50 191 0 2.48 1, 800

JANUARY 13 13 0 . .42 26 FEBRUARY 35. 40 21 0 1.26 70 8. 30 7.9 0 .27 16 WTR YR 561. 60 191 0 1.54 1, 110 OCTOBER 1966..... 4. 10 4.0 0 .13 8 1 NOVEMBER 44 44 0 1.47 87 DECEMBER 327. 90 177 0 10.6 65C CAL YR 432. 70 177 0 1.19 858 JANUARY 1967..... 98 48 0 3.16 194 26. 4 17 0 .85 52 APRIL... 55. 6 24 0 1.85 lie 80 .80 0 .026 ] 6 556. 80 177 0 1.53 1, 100 NOVEMBER 47. 5 19 0 1.58 94 DECEMBER 13 13 0 .42 26 CAL YR 241. 30 48 0 .66 479 JANUARY 3. 5 3.5 0 .11 6 9 44. 10 44 0 1.42 81 APRIL... 13. 20 7.2 0 .-44 26 10 .10 0 ..003 2 WTR YR 1968.... 121. 40 44 0 .33 241 12. 60 8.7 0 .41 25 CAL YR 73. 50 44 0 .20 146 JANUARY 1,012. 2 488 0 32.7 2, 010 FEBRUARY 829. 7 365 0 29.6 1, 650 9. 0 6.2 0 .29 it 12. 6 11 0 .42 25 MAY. .... 7. 5 5.6 0 .24 15 WTR YR 1969.... 1,883. 60 488 0 5.16 3, 740 OCTOBER 15. 30 3.8 0 .49 30 NOVEMBER 76. 5 38 0 2.55 152 DECEMBEf 29. 10 6.5 0 .94 5S 1,991. 90 488 0 5.46 3, 950 JANUARY 19. 20 11 0 .62 38 FEBRUARY 78. 2 37 0 2.79 155 134. 8 50 0 4.35 267 1. 7 1.7 0 .057 : 4 WTR YR 1970.... 80 50 0 .97 704 NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. SANTA ANA RIVER BASIN

11060500 MEEKS AND DALEY CANAL NEAR COLTON, CALIF. LOCATION.--L

PERIOD OF Creek GAGE.--Wa ap). EXTREMES. --Period of record: Maximum daily discharge, 25 cfs Mar. 2, 1938; no flow at times in most years REMARKS.- ground

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

NOV DEC JAN FEB MAR APR HAY JUN JUL

1 9. 8. 2 9. 3 9. s. 2.0 0 0 .80 .5 5.9 .3 8. 6. 4 9. 8 . 2.0 0 0 .80 .4 9.5 .3 8. 6. 5 9. 8. 2.0 0 0 .30 .4 10 .3 8. 6.

6 9. 7. 2.0 0 00 .6 10 .3 8. 6. 7 9. 5. 2.0 0 0 1.0 .4 10 .3 B. 6.' 8 9. 2 . 2.0 0 0 2.2 .0 10 .6 8. 6. 9 9. 2. .79 0 0 2.2 .0 10 .6 8. 6. 10 9. 000 2.2 4.0 8.5 .6 8. 6.

2 8. 7. 000 2.7 4.0 7.3 .1 B. 6. 3 8. 7. COO 2.7 4.0 7.3 .3 8. 6. 4 8. 7. 000 3.0 5.1 7.3 .3 8. 6.

6 8. . 7 8. 0 7.3 5.9

9 8. 0 8.

2 7. 0 C 2.4 0 4.6 11 7. 6.9 8. 6. 3 8. 0 0 2.2 0 4.6 8.9 8. 6.9 8. .' 6. 4 8. 0 0 2.2 0 5.7 8.2 7. 6.9 8. .< 6. 5 8. 0 0 2.2 0 4.6 11 7. 6.9 8. 6.

6 8. 0 0 2.2 3 4.6 11 7. 6.9 8. 6. 7 8. 0 0 2.2 0 5.0 11 7. 8.0 8. 6. 8 8. 0 0 2.2 0 5.0 11 7. 8.4 8. 6.

0 8. 0 0 2.0 4.6 8.8 7. 8.4 8. 6.

AN 8.5 3.19 .46 .79 .11 2.97 7.24 7.8 7.17 8.28 7 32 6.6 X 9. 8.7 2.0 2.4 2.2 5.7 11 1 8.4 8.4 .6 6.< N 7. 00000 4.0 5. 4.1 8.0 .9 5.

CAL YR 1965 TOTAL 2,814.40 MEAN 7.71 MAX 18 MIN 0 AC-FT 5,580 WTR YR 1966 TOTAL 1,852.60 MEAN 5.08 MAX 11 MIN 0 AC-FT 3,670 SANTA ANA RIVER BASIN

11060500 MEEKS AND DALEY CANAL NEAR COLTON, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND. MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 6.9 9.9 8.9 0 3.0 2.0 .80 10 .9 1C 2 9.1 11 9.1 0 7.4 2.0 2.2 10 .9 10 3 11 11 2.4 C 4.7 2.0 2.2 13 .9 9.9 4 11 11 00 4.0 2.0 2.2 10 .9 10 5 11 10 00 2.7 2.2 2.4 10 .9 10 6 2.1 j 1 .9 10 7 12 6.3 0 0 2.5 2.0 2.4 11 .9 10 8 11 .70 0 .80 4.0 2.0 2.7 11 .9 9.9 9 9.1 0 01. 3.3 2.8 3.2 10 .9 9.9 1C 8.4 0 05. 3.0 3.2 5.7 10 .9 9.9 11 7.5 0 06. 4.0 .80 8.4 10 .9 10 12 4.0 0 06. 4.0 0 8.7 10 .9 10 13 2.0 0 05. 2.0 0 8.7 10 .9 11 14 2.0 0 05. 0 0 9.8 11 .9 11 15 5.3 0 05. .2 1.8 0 9.5 11 .9 11 16 6.6 0 07. .0 2.7 0 9.8 11 .9 11 17 6.6 0 08. .0 2.7 0 9.9 11 .5 11 18 8.0 0 08. .C .90 .20 9.9 10 .5 11 19 9.5 o o e. .0 0 0 8.4 10 .5 11 20 9.7 0 07. .0 .60 C 8.4 10 .5 11 21 11 0 0 3.7 .0 1.3 0 10 10 .5 11 22 11 0 00 .0 .80 0 9.2 10 .5 11 23 11 0 00 .0 .50 0 2.7 10 .6 11 24 11 0 00 .C 1.2 0 4.0 6. .9 11 25 11 0 00 .7 1.3 0 4.0 1. 1 11 26 11 0 00 .0 3.1 0 3.2 j. I 11 27 10 0 00 .0 4.0 0 2.7 5. 1 11 28 10 .50 0 0 .0 4.0 0 2.7 g B .4 11 29 11 4.4 0 0 t.u ' 9. 1 11 30 10 6.6 0 0 A.O o 10' 10 i. .9 11 31 9.5 0 0 3.2 TOTAL 9.81 10.6 MAX 12 11 9.1 8.4 3.0 7.4 3.2 10 10 1 10 11 MIN 2.0 00000 0 .80 9.1 1. 9.4 9.9

DISCHARGE, IN CUBIC FEET PER SECOND, MATER. YEAR OCTOBER 1967 TO SEPTEMBER 1968 AY OCT AUG SEP

1 9.9 12 0 2.4 12 4.8 12 3.5 12 15 11 2 1.7 12 3 2.4 12 2.2 13 2.2 12 15 11 3 8.7 12 C 2.4 12 2.2 13 6.3 11 13 11 4 9.5 12 C 2.4 12 2.2 13 12 11 11 11 5 12 12 0 6.8 13 2.2 7.8 12 11 11 11 6 12 12 0 13 1 2.2 2.2 12 11 11 11 7 12 12 0 12 1 2.2 2.4 12 11 11 11 8 12 12 0 12 .1 2.2 2.4 12 11 11 11 9 12 12 0 12 2.2 2.4 12 11 11 11 10 12 12 0 12 2.2 3.3 12 11 11 11 11 12 12 0 12 7.1 3.5 12 12 11 11 12 12 12 0 12 14 3.5 11 12 11 11 13 10 12 0 12 13 11 12 12 11 11 4 12 12 0 12 12 14 12 12 11 11 5 12 12 0 9.6 12 13 12 12 11 11 6 12 12 0 5.9 13 13 12 12 11 11 7 12 12 0 12 13 13 12 12 12 11 8 12 12 0 12 13 13 12 12 12 11 9 12 7.1 0 12 13 13 12 12 12 11 0 12 2.2 .30 12 .30 13 5.6 12 12 12 11

1 12 1.2 0 12 13 2. 12 12 12 11 2 12 0 3.7 12 ) 13 2. 12 12 12 11 3 12 0 10 12 . 13 2. 12 12 12 11 4 12 0 11 12 13 2. 12 12 12 11 5 12 0 12 7.8 13 2. 12 11 11 11 6 12 0 11 2.0 13 2. 12 11 11 11 7 12 0 5. 1.8 13 2. 12 12 11 11 8 12 0 2. 1.8 13 2. 12 12 11 11 9 12 0 2. 5.2 12 2. 12 12 11 11 0 12 0 2 . ______12 2. 12 12 11 11 1 12 11 330 AN 11.6 7.55 X 12 12 0 12 13 13 14 1 12 14 15 11 N 8.7 0 0 0 1.8 0 2.2 2. 2.2 11 11 11 -FT 712 449 0 126 507 225 547 401 664 722 712 655 SANTA ANA RIVER BASIN

11060500 MEEKS AND DALEY CANAL NEAR COLTON, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 JUl AUG SEP I 11 9.9 11 0 06. 3.2 7.4 9. 9. 2 11 9.9 10 0 06. 3.2 9.2 9. 9. 3 11 9.9 10 1.0 D 6. 3.2 12 9. 9. 4 11 9.9 10 2.7 .30 4. 3.2 11 9. 9. 5 11 9.9 10 3.D .50 3. 6.0 9.1 9. 9.

6 10 6.8 9.9 3.0 .40 3. 10 9.1 9.9 9. 7 10 4.6 9.9 3.0 .60 3. 10 9.5 10 9. 8 10 2.2 9.9 3.0 .'60 3. 11 9.1 10 9. 9 7.5 2.2 9.9 3.2 .60 3. 11 10 10 9. 10 2.2 2.2 9.9 3.2 .60 3. 11 11 10 9.

11 2.4 2.4 9.9 3.2 .60 3. 11 10 10 9. 12 2.4 2.4 9.9 3.2 l.l 3. 11 10 10 9. 13 11 10 9. 14 2.4 8.5 9.9 .60 .80 3. 11 11 10 9. 15 2.4 5.3 9.9 0 .60 3. 11 11 10 10 16 2.4 2.4 10 0 .80 ' 3. 11 11 11 9.9 17 2.4 2.4 11 0 .80 3. 11 11 11 10 18 2.2 2.4 11 0 1.1 3. 11 11 10 10 19 2.2 2.4 11 0 .80 3. 11 11 10 9.9 20 2.2 2.4 10 0 1.0 3.8 11 12 10 10 21 2.2 2.4 13 0 .80 3.8 11 12 10 10 22 4.9 2.2 7.2 0 .80 3.8 11 12 9. 13 23 10 2.2 1.8 0 2.3 3.8 11 11 9. 10 24 10 2.2 1.6 0 3.0 3.8 B.5 9.1 9. 10 25 9.9 2.4 1.8 0 5.6 3.6 4.0 9.1 9. 10 26 9.9 2.4 .60 0 9.1 7.0 .0 9.1 9. 11 27 10 2.4 0 .30 7.2 11 .0 7.8 9. 10 26 10 5.3 0 0 6.2 8.3 .8 5.6 9. 9.5 29 10 11 0 0 6.2 3.5 .2 5.6 8. 10 30 10 11 0 0 6.2 3.8 .2 5.6 8. 10 31 10

301.4 305. 296. MEAN 6.94 4.67 7.30 1.04 0 0 2.01 4.19 8.25 9.72 9.6 9.8 MAX 11 11 11 3.2 0 0 9.1 11 11 12 1 1 MIN 2.2 2.2 00000 3.0 3.2 5.6 6. 9. AC-FT 426 290 449 64 0 0 120 258 491 598 606 58

DISCHARGE , IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEM JER 1970

DAY OCT NOV JUL AUG SEP 1 10 9.9 .78 .80 C 0 l.l 6.2 5.3 5. 5. 2 10 11 3 10 13 .78 .2 1.1 0 .95 .95 6.2 5.3 5. 5. 4 10 12 .78 . 2 .78 0 .95 .0 6.2 5.3 5. 5. 5 10 8.4

6 10 5.9 0 .62 .78 0 .81 .6 6.2 5.3 5. 5. 7 10 .27 .49 .62 .78 0 0 .9 6.2 5.3 5. 5. 8 10 0 .78 .62 .78 CO .9 6.2 5.3 5. 5. 9 10 0 .78 .25 .51 00 .9 5.9 5.3 5. 5. 10 10 0 .78 0 0 0 0 .9 5.9 5.3 5. 5. 11 11 0 .78 000 .56 6.9 5.9 5.3 5.9 5.3 12 11 0 13 11 1.9 14 11 1.8 15 11 5.0 16 11 5.0 17 11 5.0 16 11 4.6 19 11 4.6 20 11 4.6 21 11 5.0 22 11 S.O 23 11 1.8 24 11 .62 25 13 .62

26 13 .62 27 10 .40 .62 0 0 .95 4.1 .2 5.3 5. 5. 5.3 28 9.5 0 .62 0 0 .95 0 .6 5.3 5. 5. 5.9 29 10 0 .62 0 .95 .76 .6 5.0 5. 5. 6.2 30 11 .29 .62 0 .46 1.1 .6 5.3 5. 5. 6.2 31 10

TOTAL 330.5 107 .32 21.11 5.37 5.51 7.98 101.97 18 .30 171.6 168. 178. 167.1 MEAN 10.7 3 .58 .68 .17 .20 .26 3.40 .98 5.72 5.4 5.7 5.57 MAX 13 13 M1N 9.5 0 0 0 0 0 0 .95 5.0 5.3 5.6 S.O AC-FT 656 213 SANTA ANA RIVER BASIN

11062000 LYTLE CREEK NEAR FONTANA, CALIF. LOCATION.--Lat 34°12'44", long 117°27'26", in SE^NWWs sec.36, T.2 N. , R. 6 W. , San Bernardino County, on right bank 75 ft upstream from highway bridge, 0.7 mile upstream from right tributary, and 8 miles north of Fontana. DRAINAGE AREA.--46.3 sq mi. PERIOD OF RECORD.--October 1918 to September 1970. Combined records of Lytle Creek and diversions, October 1898 to December 1899, October 1904 to September 1970. Published as "at mouth of canyon, near Rialto" 1898-99, as "near San Bernardino" 1904-18, and as Lytle Creek and Fontana pipe line near Fontana, 1919-31. Monthly dis­ charge only for some periods, published in WSP 131S-B. GAGE.--Water-stage recorder on creek. Dual arch-culvert control since 1964; water-stage recorders and sharp- crested weirs on conduit and infiltration line. Altitude of gage is 2,380 ft (from topographic map). Octo­ ber 1918 to Mar. 21, 1938, at site 1 mile downstream at different datum. Mar. 22, 1938, to Nov. 20, 1963, at site 75 ft downstream at datum 4.58 ft lower. AVERAGE DISCHARGE. --Creek on ly, 52 years, 14.5 cfs (10 ,510 acre-ft per year) , median of y sarly mean discharges, per year) ; median of yearly mean dischar ges, 33 cfs (23,900 acre-ft per year), EXTREMES. --Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (200 cfs), water years 1966-70 Creek only Combined Wtr yr Date Time Discharge G H. Date Discharge G.H. 1966 Nov. 17 1965 0200 770 4 33 Nov. 17, 1965 770 Nov. 22 1965 "1900 9,000 10 72 Nov. 22, 1965 9,000 Dec. 29 1965 1600 9,120 10 78 Dec. 29, 1965 9,130 1967 Nov. 7 1966 1730 205 4 40 Nov. 7, 1966 209 Dec. 3 1966 0745 1,160 5 40 Dec. 3, 1966 1,160 Dec. 6 1966 1700 *7,200 9 76 Dec. 6, 1966 *7,200 Jan. 24 1967 1930 973 5 23 Jan. 24, 1967 978 Mar. 13 1967 2000 508 6 06 Mar. 13, 1967 513 Apr. 22 1967 0215 312 5 82 Apr. 22, 1967 317 1968 Nov. 19 1967 1330 *336 5 96 Nov. 19, 1967 *341 Mar. 8 1968 1000 300 a5 90 Mar. 8, 1968 305 1969 Jan. 21 1969 0900 3,600 8 8-5 Jan. 21, 1969 3,600 Jan. 25 1969 0930 35,900 a!5 0 Jan. 25, 1969 *35,900 Feb. 6 1969 - 900 6 40 Feb. 6, "1969 900 Feb. 25 1969 0200 6,000 8 80 Feb. 25, 1969 6,010 Mar. 2 1969 0630 1,410 . 6 45 Mar. 2, 1969 1,410 1970 Feb. 28 1970 2100 145 5 30 Feb. 28, 1970 150 a Fro n floodmarks. Annual minimum daily discharge, water years 1966-70 Creek only Combined Wtr yr Date Discharge Date 1966 Oct. 1 to Nov. 15, 1965 Oct. 26, 1965 1967 Short periods Nov. 30 to Dec 2, 1966 1968 Long periods Several days 1969 do. Dec. 26, 1968 1970 July 7-10, 1970 .05 Several days 18 Period of record: Maximum discharge (creek only), 35,900 cfs Jan. 25, 1969 (gage height, 15.0 ft, from floodmark) , from rating curve extended above 570 cfs on basis of slope-area measurements at gage heights 10.78 and 15.0 ft; no flow at times in each year. (Combined): Maximum discharge, 35,900 cfs Jan. 25, 1969; minimum daily, 5.2 cfs Nov. 21, 1961. REMARKS .- -Records for creek only, po go egu Fontana Union Water Co. collects water from a infiltration line upstr See schemat diagram of Santa Ana River basin elsewhere ir rge of Lytle and diversions, see tables published herein. COOPERATION.--Records of discharge through infiltration line furnished by Fontana Union Water Co.; water-stage recorder graph for Lytle Creek conduit furnished by Southern California Edison Co. in connection with a Federal Power Commission project. REVISIONS (WATER YEARS).--WSP 1011: 1943. WSP 1928: Drainage area. SANTA ANA RIVER BASIN

11062000 LYTLE CREEK NEAR FONTANA, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY JU 1 JUL AUG SE

1 C 18 350 47 28 27 15 15 7.6 3.6 2 0 65 300 43 28 27 14 15 7.6 4.0 3 0 41 260 38 27 30 15 4 6.5 4.0 4 0 51 185 38 26 30 21 4 5.5 5.5 5 0 43 170 36 23 30 21 2 5.0 3.2

6 0 0 131 53 22 30 21 2 4.5 3.2 7 0 8 123 51 21 30 21 2 4.5 3.6 8 0 8 108 49 21 33 21 2 4.5 4.0 9 0 5 102 49 20 32 21 2 4.0 4.0 10 0 3 92 47 IB 32 21 11 .3.2 5.0 11 0 41 85 45 18 30 22 10 2.9 5.0 12 0 43 84 45 17 27 18 9. 2.9 5.0 13 0 39 82 45 16 26 18 8. 3.2 4.0 14 0 39 79 41 16 26 18 9 3.2 3.9 15 0 39 70 38 16 26 17 8. 2.9 3.6 16 20 39 63 36 16 27 16 8. 2.9 3.6 .8 17 429 36 59 34 17 28 17 8. 2.6 2.9 .6 18 168 33 59 34 18 30 16 8. 3.2 2.6 .9 19 29 32 57 33 18 30 16 7. 3.6 2.6 1.8 20 16 28 55 32 20 28 16 7. 5.5 2.3 .9

21 .50 24 53 30 23 28 15 7. 8.2 2.3 .8 22 2,370 24 51 28 26 27 16 8. 7.0 2.3 .6 23 3,000 22 49 28 27 26 15 8. 6.5 2.0 .4 24 1,200 20 49 28 28 23 15 8. .0 2.0 .4 25 500 20 49 28 33 21 15 7. .0 2.0 .3 26 150 17 45 28 33 21 15 7. .5 2.3 .3 27 131 15 41 28 32 20 17 7. .0 2.3 .2 28 112 15 39 28 28 20 15 7. .2 2.0 .1 29 70 1,540 39 26 18 15 7. .5 2.0 .2 30 65 465 52 ______26 17 15 7. .0 2.0 .1 31 400 45 28 15 4.5 2.6 TOTAL MEAN 0 275 108 MAX 0 3,000 1,540 350 53 33 33 22 8.2 5.5 2. MIN 0 0 15 39 28 16 17 14 7. 2.6 2.0 .1 AC-FT

WTR YR 1966 TOTAL 18,318.40 MEAN 50.2 MAX 3,000 MIN 0 AC-FT 36,330

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 MAR APR MAY JUN JUL

,260 320 180 130 110

150 104

50

MEAN .048 1.68 151 41.0 26.8 45.4 68.6 77.9 42.7 28.8 31.7 30.5 MIN 000 14 18 16 42 71 36 17 28 28 SANTA ANA RIVER BASIN

11062000 LYTLE CREEK NEAR FONTANA, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER >ECOND, H TER YEAR OCTOBER 1967 TO SEPTEMBER 1968

DAY OC NOV DEC JAN EB 1AR »PR MAY JUN JUL AUG SEP

I 3 ) 28 71 7.3 .8 .4 .70 0 2 3 28 59 8.2 .6 .4 .60 C 3 3 28 53 10 .2 .60 0 4 3 28 40 11 .4 .0 .30 0 5 3 26 36 12 .0 0 0 6 3 26 36 10 .4 .0 0 0 7 3 26 36 6.3 .0 0 a 8 3 26 36 5.8 '.2 10 0 0 9 3 26 36 5.8 .2 I 0 0 10 3 26 34 5.3 6 0 0

11 3 26 30 . 2 0 0 12 3 26 29 .6 0 0 13 3 26 29 .4 ( 0 G 14 3 26 29 .1 ( 0 0 15 3 26 29 .1 0 0

16 3 26 2? 4. .8 0 0 17 3 26 29 4. .2 .8 0 0 18 2 26 68 .6 0 0 19 2 133 64 .6 0 20 2 91 62 .6 0 0 21 2 74 62 .6 0 0 22 2 56 62 .6 0 0 23 2 46 50 .6 0 0 24 2 46 48 3! .6 0 0 25 2 38 48 2. .6 0 0 26 2< 34 30 2. .6 0 0 27 2f 36 1 s'. .6 0 0 28 2 36 .4 .4 0 1.7 29 2 36 3. .2 0 0 30 2 72 3. .0 80 0 0 31 2E 0 60 2.20 0 1.7 0 0 MEAN 30.5 39.1 38. 5.31 2 72 6.04 2 15 .071 0 055 0 0 MAX 34 133 7 12 .2 100 7.7 .70 0 1.7 0 0 MIN 28 26 7. 2.8 .4 1.0 80 0 0 0 0 0 28 4.4 0 3.4 0 0

HTR YR 1968 TOTAL 3,800.90 M EAN 10.4 MAX 133 MIN 0 AC-FT 7,540

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 0 0 355 624 320 75 122 150 80 83 2 0 0 300 1,030 316 75 122 150 80 80 3 0 80 77 4 0 5 0 0

6 0 0 7 0 0 300 400 300 68 122 119 71 56 8 0 0 275 380 280 64 122 119 71 53 9 0 0 68 50 10 0 0 11 0 0 263 341 274 64 128 101 65 48 12 0 0 13 0 0 >59 385 262 61 131 98 62 44 14 0 19 JOO 375 218 58 134 98 62 42 15 0 4.6 290 355 214 54 131 95 62 42

16 0 0 285 353 206 50 134 95 71 42 17 0 0 ?80 352 214 44 137 95 80 40 18 0 0 83 38 19 0 46 86 38 20 0 162 250 340 196 34 154 92 B9 38 21 0 596 154 92 101 36 22 0 447 238 360 198 28 150 89 110 34 23 0 175 J74 350 203 113 58 89 107 30 24 0 577 181 345 196 116 64 89 101 29 25 3.8 8,320 3, 300 340 189 113 72 69 101 30 26 0 2,120 !>95 340 186 113 78 89 92 30 27 0 1,460 1.70 338 182 113 78 98 86 32 28 0 1,160 «5 335 178 113 64 92 86 32 29 0 900 330 186 134 61 86 80 32 30 0 680 328 182 122 50 83 80 32 0 440 325 122 83 83 TOTAL 0 3.8 MEAN 0 IDS 80.5 46.1 MAX 0 3.8 8,320 3,000 1.030 350 175 178 150 110 83 MIN 0 0 0 225 274 178 113 122 83 62 29 AC-FT 0

128,100 SANTA ANA RIVER BASIN

11062000 LYTLE CREEK NEAR FONTANA, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 JUN JUL SEP 1 33 25 14 9. J 7. 76 10 3.2 2.7 .10 .24 .54 2 33 25 14 9. ? 6. 65 10 3.2 2.2 .10 .24 .54 3 33 25 12 9. 7 5. 41 I'D 3.2 1.7 .60 .24 .54 4 33 25 12 9. . 4. 41 9. 3.0 1.1 .10 .24 .60 5 31 25 12 9. } 3. 41 9. 3.0 1.2 .10 .24 .60 6 30 25 12 9. 3 4. 34 9. 2.8 1.1 .10 .18 .60 7 30 31 12 9. < 4. 32 8. 2.8 1.1 .05 .18 .54 8 30 27 12 9. 7 4.8 29 8. 2.8 1.1 .05 .18 .60 9 30 24 12 9. , 5.0 28 8. 2.8 1.5 .05 .24 .60 10 28 23 12 15 38 27 7. 2.8 1.5 .05 .32 .60 11 27 22 12 12 30 24 7. 2.8 .86 .10 .32 .60 12 27 21 12 LI 27 23 7. 2.8 .66 .18 .24 .79 13 27 20- 12 10 27 22 6. 2.7 .60 .24 .18 .0 14 28 19 12 9. 7 26 21 6. 2.5 .44 .21 .12 .3 15 28 18 12 11 24 21 5. 2.5 .40 .18 .24 .0 16 28 17 11 14 22 20 4. 2.5 .32 .21 .36 .0 17 28 15 11 14 22 20 4. 2.5 .24 .18 .36 .0 18 28 14 11 11 20 19 3. 2.7 .18 .16 .40 .0 19 27 14 11 9. . 20 18 3. 2.7 .18 .18 .44 .0 20 27 14 11 8. 7 2., 17 3. 2.7 .18 .21 .44 .0 21 27 13 10 8. 19 16 4. 2.8 .14 .32 .49 .0 22 27 13 10 8. 18 16 4. 2.8 .18 .54 .49 .0 23 27 13 10 8. 18 15 4. 2.8 .14 .54 .44 24 27 13 10 9. 18 15 3. 2.7 .14 .44 .49 .0 25 26 13 10 9. 19 14 3. 2.7 .18 .32 .49 .1 26 26 13 10 9. 20 13 3. 2.7 .10 .30 .66 .2 27 26 12 10 9. 20 13 3. 2.8 .10 .30 1.2 .2 23 26 13 10 9. 63 12 3. 3.0 .10 .30 .49 .2 29 26 13 10 9. 3.2 .10 .30 .49 .2 30 26 13 10 9. 11 3. 2.8 .10 .30 .49 .2 31 26 10 8.

EAN 28.3 18.6 11.3 10. 18.4 24.7 5.9 2.81 .68 .23 .37 .88 2.7 .60 1.2 1.2 IN 26 12 ID 8.0 3.9 11 3.2 2.5 .10 .05 .12 .54 41 14 23 52 MAX 8 32 MIN 0 AC FT 131 600

OMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF LYTLE CREEK, SOUTHERN CALIFORNIA EDISON CO .'S LYTLE CREEK CONDUIT, kND FONTANA UNION WATER CO.'S INFILTRATION LINE, NEAR FONTANA, CALIF., WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 JUN JUL AUG SEP 1 .6 2 .6 3 .6 35 33 31 4 .6 5 .6 9.8 73 18! 65 53 60 51 42 34 32 31 6 .4 9.B 70 16( 7 .4 10 68 15! 80 51 60 51 42 33 32 29 8 .4 10 67 13( 78 51 63 51 42 33 33 28 9 .6 10 74 13< 78 50 62 51 42 33 33 28 10 .9 10 72 12< 76 48 62 50 41 32 34 28 1 .4 10 70 11 74 48 60 51 40 32 34 28 2 .4 28 3 1 10 8 112 74 46 53 47 38 32 33 28 4 1 28 5 1 16 8 10C 32 32 28 6 .9 28 7 .9 432 5 8 ) 63 47 58 46 37 31 32 28 8 .9 174 2 8! 63 48 60 45 37 32 31 2B 9 .9 46 62 B( 62 48 60 45 36 32 31 29 0 .9 37 58 8' 61 50 57 45 36 34 31 28 1 .4 18 54 8< 2 .6 2, 390 54 8 57 56 57 45 37 36 31 29 3 .2 3, 010 52 7 4 .3 1, 210 50 7- 57 58 53 44 37 35 31 29 5 .8 6 .1 7 .4 31 29 8 .7 117 45 68 57 58 50 44 36 32 31 28 9 .7 75 1.560 6B 56 48 44 36 34 31 29 0 .7 70 470 81 56 47 44 36 34 31 29

989 866 AN 9.64 2BS 134 123 66. B 53.0 56.5 46.9 38. 6 33.5 31.9 28.9 X 10 3,010 1,560 355 82 63 63 51 44 36 34 31 N 9.1 9.6 26 68 57 46 47 44 36 31 30 28 1,960 1,720 SANTA ANA RIVER BASIN 187

11062000 LYTLE CREEK NEAR FONTANA, CALIF.--CONTINUED COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF LYTLE CREEK, SOUTHERN CALIFORNIA EDISON CO!S LYTLE CREEK CONDUIT, AND FONTANA UNION WATER CO.'S INFILTRATION LINE, NEAR FONTANA, CALIF., WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 JUN Ml AUG SEP 1 27 23 22 59 68 58 3 28 24 241 58 58 4 27 23 50 54 63 45 8B 109 7B 65 5B 58

7 26 54 325 54 62 45 82 103 76 65 59 59 8

10 11 26 27 100 53 58 50 96 115 71 61 60 45 2 71 61 61 35 3 26 26 81 60 35 4 26 25 82 51 55 165 74 109 69 58 60 35

6 25 26 90 51 54 84 75 7 25 9 24 24 82 0 112 69 53 66 36

2 24 24 79 <>9 48 66 155 115 66 46 64 37 3 24 24 72 83 47 68 123 115 66 52 62 37 4 24 79 5 4B 81 118 103 69 52 61 37 6 24 23 74 104 48 Bl 118 100 68 52 60 38 7 7B 115 101 6B 52 59 38 8 24 23 6B 89 47 76 116 9 38 0 23 22 58 38 1 23 64 69 72 100 57 5B

AX 28 54 2,260 203 6B IN 23 22 22 43 47 44 60 100 65 46 57 35

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF LYTLE CREEK, SOUTHERN CALIFORNIA EDISON COVS LYTLE CREEK CONDUIT, AND FONTANA UNION WATER CO.'S INFILTRATION LINE, NEAR FONTANA, CALIF., WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

18

MEAN MAX HIN

MN 18 AC-FT 21,560 188 SANTA ANA RIVER BASIN

11062000 LYTLE CREEK NEAR FONTANA, CALIF.--CONTINUED COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF LYTLE CREEK, SOUTHERN CALIFORNIA EDISON CO.'S LYTLE CREEK CONDUIT, AND FONTANA UNION WATER CO.'S INFILTRATION LINE, NEAR FONTANA, CALIF., WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 NOV DEC I 19 21 21 2 20 20 21 109 1C6 4 20 21 21 21 250 525 5 20 21 345 191 126 150 106 91 6 20 21 22 18 500 411 325 192 127 144 103 89 8 19 21 22 16 275 386 285 186 127 143 99 80 9 138 96 77 10 20 20 21 138 93 77 1 132 132 93 75 2 19 21 3 19 21 21 21 259 390 269 188 141 129 90 71 4 20 21 21 22 302 380 224 185 146 129 90 69

7 19 22 21 19 284 358 219 179 150 124 108 67 8 19 22 22 0 20 21 22 1 20 22 22 2 19 21 205 159 163 118 132 61 it 19 5 19 204 138 184 lie 127 57 6 19 21 12 57 8 9 20 21 20 900 335 198 138 174 116 106 59 0 20 1 20 19 440 330 127 112 1C9

X 355 193 191 162 132 109 N 19 20 12 14 225 280 190 125 126 112 90 56

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF LYTLE CREEK, SOUTHERN CALIFORNIA EDISON CO.'S LYTLE CREEK CONDUIT, AND FONTANA UNION WATER CO.'S INFILTRATION LINE, NEAR FONTANA, CALIF., WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

54 38 35 39 25 ______

MEAN MAX HIN

MTR YR 1970 TOTAL SANTA ANA RIVER BASIN

11063000 CAJON CREEK NEAR KEENBROOK, CALIF.

DRAINAGE AREA.--40.6 sq mi PERIOD OF RECORD.--Decembe 1919 to September 1970. GAGE.--Water-stage recorde . Altitude of gage is 2,630 ft (from topographic map). P to Oct. 24, 1935, site 1,000 ft downstrea at different datum. Oct. 24, 1935, to Jan. 26, 1966, at 300 ft upstream at datum 6.68 ft higher. AVERAGE DISCHARGE.--50 years (1920-70), 9.09 cfs (6,590 acre-ft per r) ; median of yearly discharges, 5.8 cfs (4,200 acre-ft per year). EXTREMES.--Maximuras and minimums (discharge in cubic feet per second Annual maximum discharge (*) and peak discharges above ba (140 cfs), water years 1966-70 Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. Nov. 17, 1965 0130 499 4.65 Dec. 6, 1966 2045 *930 6.00 Jan. 21, 1969 0500 2,950 Nov. 22, 1965 1900 3,160 9.40 Jan 24, 1967 2000 680 5.70 Jan. 25, 1969 0600 7,480 Dec. 29, 1965 1530 *12,700 16.48 Apr. 11, 1967 0430 198 4.42 Feb. 6, 1969 0500 1,140 Apr. 21, 1967 2315 165 4.65 Feb. 25, 1969 0400 *8,980 Nov. 7, 1966 1630 308 5.04 Apr. 5, 1969 1900 242 Dec. 3, 1966 1015 180 4.70 Nov. 19, 1967 1330 *469 5.08 Dec. 18, 1967 1230 150 4.10 Mar. 1, 1970 1400 *550

Annual mini daily discharge, water years 1966-70 Wtr yr Date Discharge Wtr yr Date 1966 Oct. 21, 22, 1965 1.3 1969 Oct. 18, 1968 1967 Oct. 1-5, 1966 2.3 1970 Aug. 26, to Sept. 11, 1968 June 19 to July 27, 1968 2.3 Sept. 26-30, 1970 Period of record: Ma 14,500 cfs Mar. 2, 1938 (gage height, 26.0 ft, pr ent datum, a then in use), by slope-a of peak flow; minimum, 0.05 cfs June 25, 1920. REMARKS.--Records fair except those for periods of no gage-height record, which are poor. No regulation or

REVISIONS (WATER YEARS).--WSP 1091: 1946. WSP 1515: 1952, 1954-55(M), 1956. WSP 1635: 1929(M), 1930-31, 1935, 1936-37(M), 1944, 1945(M). WSP 1928: Drainage area.

DISCHARGE. IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

MOV DEC JAN FEB MAR APR MAY JUN JUC

1 . 19 4 9.2 .1 3.9 3.4 4.2 2.8 3.2 2 . 17 I B.8 .1 4.1 3.4 4.1 3.0 3.2 3 16 5 8.3 .7 4.1 3.4 4.0 .3.2 3.3 i, , 15 1 B.3 .7 4.1 3.2 4.0 3.1 3.4 5 14 9 8.3 .6 4.1 3.2 3.8 3.0 3.5

b 13 5 B.3 .1 4.1 3.0 3.6 3.0 3.5 7 ° 12 2 8 11 7 7.1 .1 4.3 3.0 3.3 3.0 3.2 9 IB 4 6.4 .1 4.6 2.8 3.2 3.0 3.1 10 46 3 6.1 .8 4.7 2.8 3.2 3.2 3.2

11 28 | 6.1 .8 4.7 2.6 3.2 3.6 3.2 12 30 o 3 30 9 6.8 .8 4.4 2.8 3.0 3.6 3.0 4 f .8 26 8 7.2 .8 4.4 2.8 3.1 3.0 2.9 5 .4 22 7 7.9 .8 4.1 2.8 2.8 2.8 2.7 1 ' & 17 7 7.9 4.1 2.8 2.8 2.6 2.4 7 21 16 7 8.3 4.0 2.8 3.0 2.2 2.2 8 , 6 14 6 8.7 3.9 2.5 3.0 2.1 2.1 9 , 1 12 6 8.7 4.1 2.7 3.0 2.8 2.0 0 .6 12 6 9.2 4.1 2.8 2.8 2.8 1.7

1 .5 12 5 1 3 9.2 4.1 3.0 3.0 2.8 1.8 2 66 11 5 1 2 9.7 4.1 2.9 3.0 3.0 1.7 3 81 11 5 1 4 \ 75 10 4 1 1 8.2 3.9 3.2 2.8 3.0 2.3 5 ' 14 10 4 1 0 B.9 3.9 3.6 2.8 2.8 2.4

6 . 4 9.B 4 9.8 9.0 3.9 3.6 2.8 3.1 3.7 7 9.4 4 9.6 8.7 3.9 3.6 2.8 3.2 2.9 a 3 9 2,960 3 8.0 3.7 4.0 2.8 3.1 2.6 0 \ 22 224 3 7.1 3 i 96 4 7. 1 3.6 3.0 3.0

TAL 4 AN 1 5 X » 8 10 2,960 &4 IN

NOTE. NO GAGE-HEIGHT RECORD NOV. 25 TO DEC. 28, DEC. 30 TO MAR. 2. SANTA ANA RIVER BASIN

11063000 CAJON CREEK NEAR KEENBROOK, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 2. 2.5 .7 .0 13 6.8 IB 0 >.3 5. 4.4 2 2. 2.7 .2 .1 12 6.B 16 9 S.9 5. 4.2 3 2. 2.7 3 .9 12 6.8 13 B S.9 5. 4.C 4 2. 2.7 .4 .8 12 7.1 34 7 ).9 5. 3.6 5 2. 2.7 7 .8 11 6.8 30 7 i.9 5. 3.6 6 2. 2.7 31 .7 9.7 6.5 20 7 S.9 5. 3.8 7 2. 37 7 .5 9.7 6.5 24 7 .9 5. 3.8 8 2. 4.B 2 .5 9.3 6.8 23 5 5.9 5. 3.8 9 2. 3.7 1 .5 8.9 7.4 23 4 .3 5. 3.6 10 2. 3.8 1 .9 8.2 7.B 22 5 .7 5. 3.6 11 2. 3.0 .0 .7 8.2 3 55 5 .3 5. 3.6 12 2. 2.6 6 .0 7.6 9 28 6 .7 5. 3.6 13 2. 2.5 .2 .0 7.B 3 25 5 .7 5. 3.6 14 2. 2.5 .8 .0 7.8 6 25 4 .7- 5. 3.4 15 2. 2.9 .8 .0 7.8 4 21 4 .7 5. 3.0 16 2. 2.9 .6 .0 7. 2 20 2 .7 5. 3.0 17 2. 2.9 .6 .0 7. 0 19 2 1 4. 3.2 IB 2. 2.8 .4 .9 7. 8 25 1 1 4. 3.2 19 2. 3.0 .4 .9 7. 7 22 I .7 3. 3.4 21 2. 3.1 .2 .0 7. 6 19 0 .3 3. 3.4 21 2. 3.5 .0 .5 7.1 5 33 0 .9 3. 3.6 2? 2. 3.7 .0 2 6.8 4 108 9.7 .2 3. 3.6 23 2. 3.1 .C 1 6.8 2 54 9.7 .4 3. 3.6 24 2. 3.1 .C 23 6.8 2 34 9.3 .1 3. 3.B 25 2. 3.1 .9 10 6.8 2 28 9.3 .5 3. 3.8 26 2. 3.1 .9 4 6.8 2 24 9.3 .9 3. 3.8 27 2. 3.5 .7 3 6.8 2 21 9.3 .9 3. 3.8 2d 2. 3.2 .5 2 6.8 2 23 9.3 .9 3. 3.6 29 ? 3.1 .5 2 2 23 9.3 .9 4. 3.6 3C 2. 3.3 .6 2 21 9.3 9 4. 3.8 31 2 . .7 1 2 9.3 4. 4.0 112.8 130 MEAN 2. A «IAX 2. 37 19 30 13 63 108 20 10 5. 4.4 4 MIN 2.

WTR YR 1967 TOTAL 4,114.9 MEAN 11.3 MAX 319 MIN 2.3 AC-FT 8,160

OCT NOV DEC. JAN FES MAR APR MAY JUN JUL AUG SEP

4.0 4.0 7.1 6.8 5.6 6.0 6.8 3.6 3.2 2.3 2.5 2.6

2.5 2.6

3.8 4.0 5.4 6.5 5.9 16 .8 3.6 2.8 2.3 2. 2. 3.6 4.0 5.1 6.8 11 8.2 .4 3.6 2.8 2.3 2. 2. 3.6 4.2 5.1 6.8 20 8.2 .4 3.8 2.5 2.3 2. 2. 3.6 4.2 5.6 6.5 7.8 8.2 .2 3.8 2.5 2.3 2. 2. 3.6 4.2 5.9 6.5 7.8 8.5 .2 3.8 2.5 2.3 2. 2. 3.6 4.2 5.9 7.1 19 8.9 .0 3.8 2.5 2.3 2. 2. 3.6 4.2 5.9 6.8 10 10 .0 3.8 2.6 2.3 2. 2.

3.6 118 16 6.8 6.3 6.2 .8 3.B 2.3 2.3 2.6 2.6

3.8 34 8.9 7.8 6.2 5.9 .8 3.8 2.3 2.3 2.8 2.6

31

TOTAL MEAN MAX 4.0 118 43 19 20 16 i.6 3.8 3.4 2.5 2.8 2.6 MIN AC-FT >54 229 154 143 158 155

118 MIN 2.3 SANTA ANA RIVER BASIN

11063000 CAJON CREEK NEAR KEENBROOK, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

1 .6 .5 .8 3.8 32 100 23 13 9. 4.6 2 .-6 .5 .8 3.8 31 90 24 13 9. 4.4 3 .6 .6 .8 3.8 31 80 26 14 9. 4.4 4 .6 .6 .8 3.8 30 0 24 14 9. 4.4 5 .6 .8 .6 3.6 33 0 45 13 9. 4.4

6 .6 .8 3.8 165 4 44 15 9. 4.4 7 .6 .8 3.8 52 8 24 15 9. 4.4 a .8 .5 3.8 46 6 20 14 8. 4.4 9 .0 .2 3.8 41 4 23 14 8. 4.4 10 .0 .3 . ' 3.8 37 2 20 14 8. 4.4 11 ,4 .5 3.6 36 1 18 13 8. 4.4 12 .4 .6 3.6 35 0 18 13 8. 4.1 13 .0 4 2 4.4 34 2 17 12 8. 4.1 14 .4 .8 4.4 34 0 17 13 8. 4.1 15 .4 .9 4.1 34 5 16 13 8. 4.1

16 .6 f 2 4.1 33 1 16 12 B. 4.4 17 .2 f 2 4.1 33 8 15 12 8. . '(.1 18 .81 .9 4.1 33 5 15 11 7. 3.8 19 .6 .9 15 32 3 14 12 7. 4.1 20 .3 .4 104 32 2 14 12 7. 4.1 21 .2 .2 640 32 5 14 12 7. 4.6 22 .1 .2 108 32 5 13 13 7. 4.6 23 .0 .4 28 221 2 13 12 7. 4.6 24 .90 .4 200 977 0 14 12 7. 4. 6 25 .90 .2 1,700 2,180 8 13 11 7. 4.f 26 .90 .2 600 40C 7 13 11 7. 4.9 27 .90 .2 220 200 6 12 10 7. 4.9 28 .90 .2 .8 95 135 5 12 9.7 7. 4.8 29 .90 .4 4 13 9.2 7. 4.8 30 .90 .4 .8 40 4 13 9.2 6. " 31 1.3 TOTAL 63.01 6 .0 13 .9 "3,912.2 5,008 1,340 560 380.3 247. 19 15 132.7 MEAN 2.03 2 30 4 32 126 '179 43.2 18.7 12.3 8.2 6 4 ) 4.42 MAX 4.6 .4 .2 1,700 2,180 100 45 15 - 9. 4.9 M1N .81 .2 ! 3.8

NOTE. NO GAGE-HEIGHT RECORD FEB. 26 TO APR. 1.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 197C

1 4 2 4 4 4 5 A

6 4 15 5.5 .1 4. 15 6.7 7. 6.4 4.4 t.4 3.6 7 4 9 4 10 4 .9 6.1 5.8 7.1 13 8.3 6.7 .1 4.4 ,.4 3.6 11 4 .9 5.5 5.8 7.1 6.6 7.8 6.7 .1 4.4' 3.6 12 4 3.8 14 5 3.8 15 5 .2 5.5 5.5 8.3 4.1 7.1 6.4 5.5 4.4 3.8 16 5 17 5

19 5 .8 3.8 20 4 .8 3.8 21 5 .8 3.8 22 5 .8 3.8 24 5 .8 3.8 25 5 .8 3.8 26 5 27 5 29 5 30 5

TOTAL 158 MEAN 5.

MIN 4 25

NOTE. NO GAGE-HEIGHT RECORD FEB. 28 TO MAR. 12, MAY 9 TO JUNE 16. SANTA ANA RIVER BASIN

11063500 LONE PINE CREEK NEAR KEENBROOK, CALIF.

DRAINAGE AREA.--15.1 sq mi. PERIOD OF RECORD.--December 1919 to September 1938, June 1949 to September 1970.

Mar. 2 , 1938, water-st age recorder (destroyed by flood) a nd Mar. 2 to Sept. 30, 1938 , nonrecording gage at

AVERAGE DISCHARGE.-- 39 years (1920-3 8, 1949-70), 1.42 cfs (1 ,030 acre-ft per year); med ian of yearly mean dis

EXTREMES. inimums (di schar ge in cubic feet pe T second, gage height in fe et). Annual 11laximu m discharge (*) and peak discharges above base (80 cfs), water years 1966-70 Date Dis ch. G.H. Da .te Time Disch. G.H. Date Time Disch. G.H. Nov. 17, 1965 0030 197 3.67 Ja.n. 24, 1967 1900 91 2.87 Feb. 6, 1969 0600 442 4.87 Nov. 22, 1965 1800 947 6.69 Feb. 25, 1969 0500 1,930 9.23 Dec. 29, 1965 1600 *1, 900 9.07 No v. 19, 1967 1315 186 3.57 Mar. 1, 1970 1200 *90 2.72 Nov. 7, 1966 1630 80 2.77 Ja n. 21, 1969 0630 1,560 8.12 Dec. 6, 1966 1700 216 3.76 Ja n. 25, 1969 0930 2,650 10.70

Wtr yr D ate Discharge Wtr yr Date Disch arge 1966 M any days .10 1969 Many days .36 1967 N ov. 22-30, Dec. 4, 1966 .60 1970 June 30 to July 7, July 15, 1970 1.8 1968 Sept. 22-30, 1968 .50 k flow; no flow Auf ;. 6-8 , Sept. 29- 30, 1965.

REMARKS. - -Records gc>od pr ior to Jan. 21, 1969, and poo r ther eafter. No gage-height rec ord Aug. 6 to Sept. 8, in thi s report.

REVISIONS. (WATER YE/ ^RS) .--WSP 1635: 1920-22(M), 1924- 25(M), 1926-27 , 1928(M), 1930, 1931(M), 1932-33, 1934-3 6(M). WSP 1928: Drainage area. DI

CAY JUL AUG SEP 1 .10 .10 .10 .70 11 .70 .60 2 l°o To 3 i, .10 .10 .10 .10 .10 6 .10 7 .10 .10 8 .10 9 10 .10 .10 .20 .70 .60 .70 .60 .50 .60 .70 .70 .70 11 .10 .10 .20 .70 .60 .70 .60 .60 .60 .70 .70 .70 12 .10 .10 .20 .70 .60 .70 .60 .60 .60 .70 .70 .70 13 .10 .10 .30 .70 .60 .70 .60 .60 .60 .70 .70 .70 .10 .80 15 .10 .20 .30 .70 .60 .70 .60 .60 .60 .70 .60 .80 16 .10 12 .20 .70 .60 .60 .60 .50 .60 .70 .60 .80 17 .10 33 .20 .70 .60 .60 .60 .50 .60 .70 .60 .BO 18 .10 1 .0 .20 .80 .60 .60 .60 .50 .60 .60 .50 .80 19 .10 .10 .20 .70 .60 .60 .60 .50 .60 .60 .50 .80 20 .10 .10 .20 .60 .60 .60 .60 .50 .60 .60 .50 .80

21 .10 .10 .11 .70 .60 .60 .50 .50 .60 .60 .40 .80 22 .10 125 .10 .BO .60 .60 .50 .60 .60 .60 .40 .70 23 .10 14 .20 .90 .60 .60 .50 .60 .60 .50 .40 .70 24 .10 4 .0 .20 .90 .60 .60 .50 .60 .60 .50 .40 .70 25 .10 2 .10 .90 .60 .60 .50 .60 .60 .50 .40 .80 26 .10 .60 .10 .90 .60 .60 .50 .50 .60 .50 .40 .80 27 .50 .40 .BO 28 .10 .30 .20 .80 .70 .60 .50 .50 .60 .60 .40 .80 29 .10 .20 349 .80 .60 .50 .50 .70 .60 .50 .80 30 .10 .20 4.3 .80 .60 .50 .50 .70 .60 .50 .80 31

MAX .10 125 .80 MIN .10 .10 .10 .60 .60 .60 .50 .50 .50 .50 .40 .50 SANTA ANA RIVER BASIN

11063500 LONE PINE CREEK NEAR KEENBROOK, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

NOV DEC JAN FEB MAR APR MAY 'JUN JUL

.80 .70 .BO .2 .0 ,2 .B .0 .0 .9C .90 .60 .70 .90 .2 .0 .2 .4 .0 .0 .90 .90 .80 .70 J.O .2 .c .4 .4 .0 .0 .90 .90 .80 .70 .60 .2 .c .6 .6 .C .3 .90 .90 .80 .70 >.3 .0 .0 .6 .4 .C .3 .90 .90

.70 .80 3 .0 .0 .4 .6 .0 1.0 .90 .90 .70 4.9 .6 .0 .0 .4 .4 .0 .90 .80 .90 .70 1.0 .2 .0 .0 .4 .4 .0 .90 .8: .8S .7C .90 .2 .0 .c .6 .4 .0 .90 .8C .80 .70 .BO .2 .0 .0 .6 .4 .0 .90 .80 .BO

. 70 . BO .2 .2 .0 .8 .4 .2 .90 .8C .80 .70 .80 .2 .2 .0 .3 ,2 .2 .90 .80 .60 .70 .80 .2 .2 .c .B .8 .2 .90 .80 .80 . 70 . 70 .2 .2 .2 .2 .2 .2 .90 .BC .80 .70 .70 .2 .0 .2 ,2 .2 .2 .90 .BO .80

.70 .70 .2 .0 .2 .2 .2 .2 .90 .90 .80 .70 .70 .2 .0 .2 .2 .2 .2 .90 .90 .80 .70 .70 .2 .0 .70 .70 .2 .0 .2 .0 .4 .2 .90 .90 .80 .70 .7C .2 .0 .2 .0 .4 .2 .90 .90 .80

.70 .70 .0 .0 .2 .0 S 9 .2 .90 .90 .80 .70 .60 .0 .6 .2 .0 .5 .2 .90 .90 .80 .7C .6C .0 .4 .2 .0 .6 .2 .90 .90 .60 .70 .60 .0 2 .2 .0 .8 .2 .90 .90 .80 .70 .60 .0 .6 .4 .0

.70 .60 .0 .6 .4 .0 .0 .2 .90 .90 .80 .70 .60 .0 .2 .4 .0 .C .2 .90 .90 .80 .70 .60 .0 .0 .2 .2 .0 .2 .90 .90 .80 .70 .60 .0 .0 .2 .0 .2 .90 .90 .80 .70 .60 .2 .0 - - .2 .0 .2 .90 .90 .80 .73 .2 . 0 - .4 .2 .90 .90

22.20 25.30 7t

.4 .8 .5 .2 1.0 .90 .90 .70 .60 .60 .0 .0 0 .0 .0 .90 .80 .80 44 50 151 19 63 86 9B 70 . 57 54 49

AC-FT 906

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 NOV DEC JAN FEB MAR APR MAY JUN JUL

1 .80 .70 .0 .0 .70 .80 .0 .90 .80 .80 .70 .60 2 .BO .70 .0 .C .70 .80 .0 .90 .BO .60 .70 .60 3 .80 .70 .c .c .70 .80 .0 .90 .60 .60 .70 .60 4 .80 .70 .0 .0 . 70 .70 .0 .90 .80 .60 .70 .60 5 .80 .70 .0 .0 .70 .80 .0 .90 .80 .60 .70 .60

6 .80 .70 .0 .0 .80 .60 .0 .90 .80 .70 .70 .60 7 .80 .70 .0 .0 .80 .90 .0 .90 .80 .70 .70 .60 8 .80 .70 .0 .0 .80 5.8 .90 .90 .BO .70 .70 .60 9 .80 .70 .3 .0 .80 .80 .90 .90 .80 .70 .70 .60 10 .80 .BO .0 .90 .80 .80 .90 .90 .80 .70 .70 .60

1 .80 .90 .0 .90 .80 .80 .90 .80 .80 .70 .70 .60 2 .80 .90 .0 .90 .80 .80 .90 .80 .80 .70 .70 .60 3 .80 .90 .0 .BO .80 .60 .90 .80 .80 .70 .70 .60 4 .80 .90 .0 .70 .80 .80 .90 .80 .80 .70 .70 .60 5 .80 .90 .C .70 .80 .80 .90 .80 .80 .70 .70 .60

6 .80 .90 .2 .70 .BO .60 .90 .80 .80 .70 .70 .60 7 .80 .90 .2 .70 .80 .BO 1.0 .80 .80 .70 .70 .60 8 .BO .90 .1 .70 .80 .60 1.0 .60 .80 .70 .70 .60 9 .80 18 .2 .70 .60 .80 1.0 .BO .80 .70 .70 .60 0 .80 5.7 .0 .70 .80 .80 1.0 .80 .80 .70 .70 .60

1 .80 2.3 .0 .70 .80 .80 1.0 .80 .80 .70 .7C .60 2 .80 1.0 .0 .70 .80 .60 .90 .60 .80 .70 .70 .50 3 .80 .90 .0 .70 .80 .80 .90 .80 .80 .70 .60 .50 4 .80 .80 .0 .70 .80 .60 .90 .80 .90 .70 .60 .50 5 .80 .80 .0 .70 . BC, .80 .90 .80 .90 .70 .60 .50

6 .80 .60 .0 .70 .80 .80 .90 .80 .90 .70 .60 .50 7 .80 .60 .0 .80 .80 .80 .90 .80 .90 . 0 .60 .50 8 .80 .90 .0 .60 .80 .80 .90 .80 .90 . 0 .60 .50 9 .80 .90 .0 .80 .80 .60 .90 .60 .90 . 0 .60 .50 0 .80 1.4 .0 .80 ______.60 .90 .80 .80 . 0 .60 .50 1 .0 .70 .80 .80 . 0 .60

T»L 24.80 46.60 3 .7 25.50 22.70 29.80 28.20 25.60 24.60 21.40 20.80 17.10

X .60 IB .1 1.0 .80 5.8 1.0 .90 .90 .80 .70 .60 N .80 .70 .0 .70 .70 .70 .90 .80 .BO .60 .60 .50 SANTA ANA RIVER BASIN

11063500 LONE PINE CREEK NEAR KEENBROOK, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 NOV DEC JAN FEB MAR APR MAY JUN JUL

9 2 .46 > 6 .3 .8 9 12 8.0 5.5 5.2 4.6 A. 6 1 .46 ) 6 .3 .8 8 12 8.0 5.5 5.5 4.6 4.6 4 .46 j 56 .3 .8 8 12 7.6 5.5 5.5 4.6 A. 6

6 .46 . ( . 6 .3 5 6 10 7.6 5.5 6.2 A. 9 4.6 7 .46 ) 6 .3 .0 6 2 9 .46 . ( . 6 .3 .4 2 i: .46 . 6 .3 .6 6 11 6.6 5.9 5.5 5.9 4.3

12 .4* . ( . 6 .1 .8 4 11 6.6 5.5 5.9 5.9 4.3 13 .46 . ( . 6 .1 .4 6 11 6.9 5.5 5. A 5.9 4.3 14 .46 > . .6 .3 6 8 11 6.9 5.5 5.2 5.5 4.0

16 .36 . < . 6 .3 .2 5 11 6.6 5.5 5.2 5.5 4.0 17 .36 . < . <6 .3 .2 3 11 6.6 5.5 5.2 5.5 4.0 Id .36 . ( . 6 .3 .0 2 11 6.6 5.5 5.2 5.5 4.0 19 .36 . ( . 6 l.l .2 3 11 6.2 5.5 5.2 5.5 A.O ?* .36 . 6 13 .2 2 11 6.2 5. A 5.2 5.5 4.0

21 .36 . ( . 6 167 .4 4 11 5.9 5.9 4.9 5.2 4.0 22 .36 . ( 6 4.6 4 11 5.9 5.9 4.6 5.? 4.0

24 .36 . ( . 6 11 19 1 10 5.9 6.2 4.6 5.2 A.O

26 .36 . < . >6 4.8 2 8.8 5.9 5.9 4.6 A. 9 4.0 27 .36 . ( .( 6 2.4 1 8.8 5.9 5.9 4.6 A. 9 4.0 i& .36 . ( .( 6 2.0 2 2 8.8 5.5 5.9 A. 9 A. 9 4.0

PEW .42 .4< .' 0 24. HKK 9 12 8.4 6.2 6.2 5.9 A. 9

U

CAL YR 1968 TOTAL 2 B.92 t EAN .71 MAX 5.8 MIN .3< AC-FT 514 WTR YR 1969 TOTAL 1,5C 5.86 > EAN 9.61 MAX 701 MIN .3< AC-FT 6,950

1 3.6 4.5 4.8 3.6 3.4 20 3.2 1.8 2.4 .8 2.6 2.2

1 3.6 A. 3 A. 5 3.6 3.2 3.2 3.8 3.6 2.2 !.2 2.4 2.2

6 3.6 4.5 4.0 3.2 3.2 3.0 A.O 3.6 2.2 !.A 2.2 2.2 8 3.8 4.8 3.4 3.2 21 2.B 3.8 3.6 2.2 .A 2.2 2.2 3 4.0 4.8 3.4 3.2 3.2 3.8 3.2 1.8 .6 2.2 2.2

TAL 117.3 1A0.2 1A1.5 110.0 117. 4 118. B 111.8 122.6 70.0 6 i.9 72.8 66. B SANTA ANA RIVER BASIN

11063680 DEVIL CANYON CREEK NEAR SAN BERNARDINO, CALIF. LOCATION.--Lat 34°12'12", long 117°20'02", in Muscupiabe Grant, San Bernardino County, on right

DRAINAGE AREA.--5.61 sq mi. PERIOD OF RECORD.--Novem 1911 to September 1912, October 1913 to September 1914, December 1919 to Septembe 1970. Monthly figur only for January 1914, published in WSP 1315-B.

1,900 ft (from topographic map). Pr to December 1919, nonrecording gage ite 500 ft downstream uppl ry gage AVERAGE DISCHARGE.--Creek only, 51 years (1913-14, 1920-70), 1.88 cfs (1,360 e-ft per year); median of yearly (1913-14, 1934-70), 3.63 cfs (2,630 acre-ft per year); median of ye rly mean discharges, 2.3 cfs acre-ft per year). EXTREMES.--Ma age height in feet). An:nual max i charge d pei charges r year 70 Time Disch. G.H. Date Disch. G.H. Date Time Disch. 22, 1965 1930 *480 3.96 Apr. 22, 1967 0030 34 2.48 Jan. 25, 1969 0700 *3,720 29, 1965 1730 295 3.65 Feb. 6, 1969 0600 310 Nov. 19, 1967 1400 *1,430 5.22 Feb. 15, 1969 1800 63 3, 1966 0900 81 2.83 Mar. 8, 1968 0500 62 2.67 Feb. 25, 1969 0400 1,780 6, 1966 1700 *671 4.31 24, 1967 2000 128. 3.13 Jan . 21, 1969 0800 84 2.85 Mar 1, 1970 - *96 13, 1967 1030 40 2.43 inimum daily discharg r years 19S6-70 Date Discharge Wtr yr Date Discharge 1966 Many days Oct. 4, 1968 .53 1967 do. Oct. 1, 1969 1968 June 13-25, Aug. 20-27, 1968 Period of -ecord: Maximum dis 3,720 cfs Ja 25, 1969 (gage height, 5.40 ft), on basis of slope- ea measurem ;nt of peak flow; no t times in mo REMARKS.--Records go

COOPERAT REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FFET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FEB MAR APR MAY Jl>N JUL .

1 12 2.2 1.6 .20 .10 .20 .10 2 0 .0 10 2.4 2.B .20 .10 .20 .10 3 0 .8 10 1.8 1.5 .20 .10 .20 .10 4 0 .6 11 1.7 .80 .20 .10 .20 .10 5 0 .4 10 1.6 .50 .20 .10 .10 .10 6 0 .2 9.5 3.3 .70 .20 .10 .10 .10 7 0 .2 8.1 5.5 1.2 .20 .10 .10 .10 8 0 .1 6.5 5.8 1.0 .30 .20 .10 .10 9 l) .5 5.4 4.5 1.0 .30 .90 .10 .10 10 0 1 4.8 4.4 1.0 .30 .80 .10 .10 11 o fl 4.6 4.4 1.0 .30 1.0 .10 .10 12 0 .1 4.3 2.6 .90 .30 .60 .10 .10 13 0 .8 4.8 2.5 .80 .30 .20 .10 .10 14 0 .6 4.3 2.2 .80 .30 .20 .10 .10 15 0 .6 3.6 2.1 .40 .30 .20 .10 .iq 16 .50 .9 3.4 2.0 .20 .30 .20 .10 .10 17 8.4 .8 3.2 1.8 .20 .30 .20 .10 ' .10 18 5.9 .0 3.0 1.6 .20 .50 .20 .10 .10 19 1.3 .7 2.8 1.5 .20 .90 .20 .10 .10 20 1.0 .6 2.6 1.4 .20 .40 .20 .10 .10

21 .90 .8 2.4 1.0 .23 .30 .20 .10 0 22 87 . 4 2.2 .60 .30 .20 .20 .10 0 23 142 .4 2.0 .60 .40 .20 .20 . 0 0 24 89 .4 1.8 .60 2.6 .20 .20 . 0 ,0 25 34 .2 1.7 .60 3.2 .20 .20 . 0 0 26 6.5 .2 1.6 .60 2.7 .20 .20 . 0 0 27 4.0 .3 1.7 .50 2.6 .10 .20 . 0 0 28 3^ 1 .7 1.6 .50 1.8 .10 .20 . 0 0 29 2.4 4 1.6 .80 .10 .20 . 0 0 3C 2.1 18 2.4 .50 .10 .20 . 0 0 31 13 2.0 . 20 .20 0 TOTAL 2.00 MEAN C 12.9 5.02 4.67 2.15 1.04 .26 .26 .11 .065 MAX MIN 0 0 1.1 1.6 .50 .20 .10 .10 .10 0 AC-FT 16 6.7 4.0 (t) 34 809 398 458 279 226 179 153 116 78

CAL YR 1965 TOTAL 670.90 MEAN 1.84 MAX 142 MIN 0 AC-FT 1,330 t 2,080 WTR YR 1966 TOTAL 802.40 MEAN 2.20 MAX 142 MIN 0 AC-FT 1,590 t 2,840

t COMBINED DISCHARGE, IN ACRE-FEET, OF DEVIL CANYON CREEK AND CITY OF SAN BERNARDINO DIVERSION. SANTA ANA RIVER BASIN

11063680 DEVIL CANYON CREEK NEAR SAN BERNARDINO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECONO, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 0 0 1.7 .2 1.5 9.0 11 4.3 .40 .30 2 a .80 1.6 .0 1.5 9.0 9.9 4.0 .40 .30 3 0 26 1.5 .3 1.4 8.3 9.9 3.8 .40 .4l< 4 0 5 0 58 1.4 .9 3.1 8.3 9.6 3.8 .50 .70

6 01 62 1.4 .50 .40 7 2.6 38 1.4 .4 1.4 8.0 9.0 3.4 .50 .40 B .80 2 1.4 .9 1.4 9.6 9.0 3.7 .50 .40 9 . 0 1 1.4 .8 1.4 7.9 9.9 3.4 .50 .40 1G . 0 1 1.0 .7 1.5 6.5 11 3.5 .50 .40

1 . D .80 .6 4.6 12 9.9 3.4 .5L .30 2 . C '.BO .5 14 9.4 9.4 4.6 .50 .40 3 . Q .80 .7 25 9.2 B.7 8.1 30 .50 .40 4 . 0 .80 .0 18 9.0 B.5 6.1 JO .50 .40 . .80 .0 12 8.7 7.9 4.1 30 .50 .4u

6 . 0 .BO .8 11 9.9 7.3 4.0 30 .5u .50 7 . 0 .80 .7 9. 1 6.3 4.3 90 .50 .40 8 . C .80 .7 9. 4 5.8 3.7 2. b .40 .30 9 . 0 .80 .6 B. 6 5.4 3.1 2. 5 .43 .30 C . 0 .80 .6 9. 5 5.4 3.0 70 .40 .50

1 . 0 .80 .6 9. 9 5.4 2.3 !>0 .40 .40 2 . 0 1.9 .5 8. 3 4.6 2.3 bO .40 .40 3 . 0 7.9 .5 8. 8 4.6 1.9 50 .50 .40 4 . 0 21 .5 8. B 4.4 1.7 50 .50 .40 5 0 23 .9 8. 7 4.4 1.7 50 .40 .30

6 0 15 .5 8. 5 4.3 1.8 50 .40 .60 7 0 11 .0 8. 4 4.3 1.7 JO .40 .50 8 0 10 .5 7. 3 4.6 2.0 ,0 .40 .40 9 0 5 4.6 1.8 40 .40 .40 0 j "a 7" 4 4.6 1.6 *0 .30 .30 "a n

AN 0 .20 14.0 4. 7 3.17 7.4 12.1 7.20 3.35 .92 .45 .42 X 0 2.6 162 3 9.2 2 23 11 8.1 2.6 .50 l.C N Q 0 0 . C 1.5 I. -FT 0 12 ) 58 72

C-FT 1,390 t 2,670 TR YR 1967 TOTAL 1,642.80 MEAN 4.50 MAX 162 MIN 0 A C-FT 3,260 t 4,940

t COMBINED DISCHARGE, IN ACRE-FEET, OF DEVIL CANYON CREEK AND CITY OF SAN BERNARDINO DIVERS ON.

DISCHARGE , IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER I 968

AY OCT NOV LIL AUG SEP

1 .30 .20 5.6 .80 .1 .60 1.0 .30 .50 4. 9 .50 .30 2 .20 .20 4.7 .70 .3 .60 1.0 .30 .40 5. 3 .40 .30 3 .20 .20 4 .20 .20 2.5 .60 .3 .50 .80 .30 .30 5. 3 .40 .40 5 .20 .20 1.7 .60 .1 .80 .60 .30 .30 4. 3 .40 .30

6 .20 .20 1.7 .60 .0 .6 .60 .30 .20 4. .40 .4C. 7 .2C .20 2.1 .60 .0 .4 .60 .30 .30 4. . 4w .60 8 .20 .20 2.2 .50 .0 1 .60 .30 .80 3. .40 .40 9 .20 .20 1.3 .40 .0 .1 .60 .30 .20 3. .40 .40 10 .20 .20 1.4 1.0 .4 .8 .60 .30 .20 3. .40 .40

1 .20 .20 1.3 1.1 .1 .6 .70 .30 .20 2. .20 .40

3 .20 .20 .60 .80 .0 .6 .60 .70 .10 2. .40 .50 4 .20 .20 1.5 1.0 .1 .6 .60 .40 .10 2. .40 .50 5 .20 .20 1.5 .BO .6 .1 .60 .20 .10 2. .40 .50

6 .20 .20 .60 .60 .4 .1 .60 .20 .10 2. .50 .40 7 .20 .20 .60 .80 .4 .4 .60 .20 .10 2. .60 .40 8 .20 .20 6.8 .70 .0 .1 .60 .20 .10 2. .50 .50 9 .20 78 5.8 .70 .80 .0 .60 .20 .10 2. .30 .70 C .20 16 3.5 .70 .80 .4 .60 .20 .10 2. .10 .40

1 .20 7.1 3.0 .50 1 .0 1.0 .60 .20 .10 2. .10 .50 2 .20 5.4 2.5 .60 .80 .80 .60 .20 .10 2. .10 .60 .10 .60 4 .20 4.1 1.6 .80 .50 .80 .60 .20 .10 1. .10 .90 5 .20 3.4 1.5 .BO .50 .80 .60 .20 .10 1. .10 .80

6 .20 3.5 1.3 1.0 .50 .90 .50 .20 .20 )0 .10 .80 7 .20 3.8 1.2 5.1 .50 .70 .40 .20 .60 . 0 .10 .80 8 .20 2.7 .90 3.0 .60 .70 .40 .20 1.2 1. } .20 1.0 9 .20 1.7 .80 2.7 .60 .70 .40 .20 3.0 0 .60 1 . 3 0 .20 9.4 .80 1.7 1.0 .40 .30 3.1 iO .40 1.3

AN .21 4.75 2.15 1.06 1.08 2.01 .62 .28 .45 2.68 .32 .58 X .30 78 6.8 5.1 2.1 14 1.0 .70 3.1 6.0 .60 1.3 N .20 .20 .60 .40 .50 .50 .40 .20 .10 .60 .10 .30 -FT 13 282

AC-FT 2,810 t 4,590 AC-FT 978 t 2,180 t COMBINED DISCHARGE, IN ACRE-FEET, OF DEVIL CANYON CREEK AND CITY OF SAN BERNARDINO DIVERSION. SANTA ANA RIVER BASIN

11063680 DEVIL CANYON CREEK NEAR SAN BERNARDINO, CLIP.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

1 1.5 1. 43 140 22 10 6.5 3. .1 2 .89 1. 1. 41 120 21 9.8 6.4 3. .1 . 4 .53 1. 1. 44 90 21 20 6.3 3. .1 5 .83 1. 1. 49 75 20 16 6.2 3. .1 .

6 1.3 1. 1. 89 65 20 20 6.2 3. .9 7 .89 1. 1. 32 60 20 15 6.1 3. .8 8 .89 1. I. 24 55 20 12 6.0 3. .8 9 .89 1. 1 . 22 50 20 11 6.0 3. .8 10 .89 I. 1. 20 45 30 11 5.9 2. .7 11 .89 1. 1. 19 42 26 10 5.8 2. .7 12 .96 2. 6 20 40 23 9.B 5.8 2. .7 13 .96 2. 2. IB 37 21 9.3 5.6 3. .6 14 .96 2. 17 35 19 9.0 5.6 2. .7 15 1.0 2. 1. 29 34 IB 8.8 5.4 2. .6 . 16 1.0 2. 1. 26 33 17 8.6 5.2 2. .5 17 1.0 2. 7 22 32 16 8.4 5.0 2. .5 IB .96 1. 1 . 26 31 15 8.2 4.B 2. .4 19 .96 1. 9. 24 30 14 8.0 4.6 2. .3 20 .96 2. 20 23 29 13 7.8 4.4 2. .3 21 .96 1. 46 22 28 13 .6 4.2 2. .2 22 .1 1. 31 24 27 12 .5 4.0 2. .2 23 .1 1. IB 46 26 12 .4 3.8 2. .2 24 .0 I. 23 42 26 11 .3 3.6 2. .2 25 .1 1. 556 262 25 11 .2 3.4 2. .2

26 .1 2. 170 220 25 11 .1 3.2 2. .2 27 .2 2. 65 190 24 10 .0 3.2 2. .2 28 .3 2. 76 160 24 10 .9 3.2 2. .1

MEAN 1.03 1.7 1 54 11 PAX 1.5 2. 5 6 262 140 30 20 6.5 3. .1 KIN .53 1. 17 17 - 22 10 6.6 3.1 2.

(t) 122 15 CAL YR 1968 TOTAL 431.17 MEAN I. IB MAX 14 MIN .10 AC-FT 855 t 190 12,030

t COMBINED DISCHARGE, IN ACRE-FEET, OF DEVIL CANYON CREEK AND CITY OF SAN BERN ARDINO DIVERSION.

DISCHARGE, IN CUBIC FEET PER SECOND , MATER YEAR OCTOBER 1969 T 0 SEPTEMBER 1973 DAY JUN JUL AUG SEP

1 .88 7 2.0 2.7 2.4 3.9 4.9 2.1 2.0 1.8 l.B 2.3 2 1.3 8 2.0 2.7 2.5 6.1 4.9 1.9 2.0 1.8 l.B 2.3 3 1.3 .( 8 2.4 2.7 2.2 9.5 5.2 2.2 2.0 1.8 1.7 2.5 4 1.2 .( 1.8 1.8 1.7 2.6 5 .92 3 2.4 2.8 2.3 9.0 4.5 1.9 2.0 1.8 1.8 2.4 6 .69 1. 7 .61 2. 2.5 2.8 2.3 6.2 4.7 1.7 1.8 1.8 1.8 2.8 8 .42 1. 2.6 2.B 2.2 6.1 4.8 1.9 1.7 1.7 1.7 1.7 9 .27 I. 2.8 3.2 2.4 5.7 4.9 1.8 1.7 1.8 1.9 2.2 10 .22 1. 2.B 4.9 4.5 6.0 4.6 1.7 1.7 l.B 1.9 1.9

11 .18 1. 3.1 4.1 5.3 5.9 4.6 1.7 1.7 1.8 1.9 2.0 12 .15 1. 3.0 3.9 4.7 6.4 1.5 1.5 1.7 l.B 1.9 1.9 13 .19 1. 2.9 3.5 4.8 6.4 .38 2.1 1.6 1.9 1.8 1.9 14 .14 1. 1.9 1.8 1.8 15 .19 1. 3.0 3.4 4.7 5.5 2.4 2.1 1.7 1.8 2.0 1.9 16 .36 2. 2.9 4.0 5.2 4.9 2.3 2.1 1.7 1.9 2.0 1.9 17 1.8 1.8 2.0 1.9 IB .62 1. 3.1 3.6 5.2 4.6 2.4 2.1 2.1 1.8 2.0 1.9 19 .39 2. 3.1 3.1 5.1 4.8 2.4 2.1 2.1 1.9 2.0 1.9 2J

21 .40 1. i 3.2 2.7 5.5 4.4 2.2 2.1 2.1 1.9 2.0 1.9 22 .36 1. 23 .34 1. i 3.6 2.2 5.4 4.2 2.3 2.1 1.8 1.8 2.1 1.9 24 2.1 1.7 1.7 2.1 1.9 25

26 .39 1.9 5.1 2.5 4.4 4.5 2.1 2.0 1.5 1.7 2.0 1.8 27 2B 29 .27 2.0 4.3 2.6 4.6 2.1 2.0 1.7 1.7 2.3 1.7 30 .11 2.0 2.9 2.6 2.3 l.B 31 .16 2-8 2.6 5.0 2.0 1.8 2.4 TOTAL 55. B 61.3 60.1 MEAN MAX 1.3 2.5 5.1 4.9 5.5 2.4 2.8 MIN .11 .03 2.0 2.2 2.2 3.9 .38 1.5 1.5 1.7 1.7 1.7 AC-FT 28 90 198 184 222 332 182 122 108 111 122 119 (t) 438 248 235 224 209 193 203

WTR YR 1970 TOTAL 920.38 MEAN 2.52 MAX 35 MIN .88 AC-FT 1,830 t 2,830 t COMBINED DISCHARGE', IN ACRE-FEET, OF DEVIL CANYON CREEK AND CITY OF SAN BERNARDINO DIVERSION. NOTE. NO GAGE-HEIGHT RECORD FEB. 13 TO MAR. 2. SANTA ANA RIVER BASIN

11065000 LYTLE CREEK AT COLTON, CALIF. LOCATION.--Lat 34°04'44", long 117°18'17", ln San Bernardino Grant, San Bernardino County, o downstream from Colton Avenue, 1,930 ft upstream from outlet end of channel, and 1.3 mile ton. DRAINAGE AREA.--172 sq mi. PERIOD OF RECORD.--October 1957 to September 1970.

AVERAGE DISCHARGE.--13 yeai (870 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per econd, gage height in feet) for the water years ined in the following table:

Wtr y Discharge G.H. Date Discharge 1966 29, 1965 14,800 12.40 Long periods 1967 6, 1966 4,600 5.67 do. 1968 730 2.59 do. 1969 16,800 a!3.6 1970 726 2.67 a From floodmark. Period of record: ight, 13.6 ft, from floodmarks), from rating curve ex1 n flood at gage height 21.4 ft; flow for most of time

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

1 : 2.8 10 3.5 >.l 0 2.2 2 0 1.8 9.i. 4.2 5.1 0 1.4 I 3 1.0 8.5 4.2 ».2 0 1.4 4 0 .60 8.4 4.2 1.5 0 1.4 5

f> j .10 4.0 30 .4 0 1.0 7 0 .10 2.C 23 .0 0 1.0 a 0 .10 l.C 15 .80 2 1.0 9 C 8.8 .50 10 .80 2 1.0 10 C 9.2 0 10 .80 2 .80 1 C 8.6 0 10 .80 2 .80 2 0 10 0 10 .2 2 .60 3 C 8.6 0 10 .8 2 .60 4 1.4 8.6 .70 10 2 .40 5 .90 8.6 0 8.6 2 .40 t 18 6.1 6.4 10 2 .40 7 122 6.1 10 7.2 4 .30 8 100 6.1 7.2 6.1 4 .30 9 1.8 6.1 5.1 6.1 2 .20 0 l.C 6.1 3.5 7.2 0 .20

1 l.C 6.1 5.1 4.2 .2 0 .20 2 1,010 6.1 23 4.2 1 8. .20 3 727 5.1 6.1 4.2 1 7. 0 4 322 5.1 4.2 5.1 2 6. 0 5 40 5.1 18 5.1 1 6. 0 t 6.1 5.1 12 5.1 2 5. 0 7 6.1 5.1 10 5.1 2 5. 0 8 5.1 5.1 7.2 5.1 2 5. 0 9 5.1 2,740 10 1 3^ 0 0 4.2 322 12 1 * o 1 14 0 0 AN 0 79.1 104 6.22 8.20 3.23 1.5 .55 0 X I 2.2 0 N 0 0 .10 0 3.5 .80 0 0 -FT 0 4.700 6,380 382 0 SANTA ANA RIVER BASIN

1106SOOO LYTLE CREEK AT COLTON, CALIF.--CONTINUED

3.0 3.0 2.2

.10 .50 .10

7.0 7.0 5.0 5.0

3.0 5.0 4.0

0 3.0 0 C 0 0 3.0 0 0 0 0 3.0 0 0 0 0 4.0 0 0 0 0 4.0 0 0 0 3.0 0 4.5

44.6 2,439.0 572.00 0 80.10 148.20 10.70 20. 5 1.49 78.7 18.5 0 2.58 4.94 .36 .68 35 1,630 416 0 61 68 5.0 7.2

OISCHA

NOV

.10 230.70 .10 .003 7.44 .003 .10 230 .10 SANTA ANA RIVER BASIN

11065000 LYTLE CREEK AT COLTON, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

DAY OCT NCJV J UL AUG S

1 0 0 0 5.1 98 32 77 42 0 16 8 2 0 0 0 4.2 217 56 84 46 0 16 8 3 0 0 0 3.5 105 91 71 51 0 18 8 4 0 0 0 2.8 46 42 119 37 C 20 1 5 0 0 0 32 70 37 91 42 0 28

6 0 0 0 580 65 42 112 42 0 32 7 0 0 0 37 37 42 119 42 0 37 8 0 0 0 10 51 42 112 32 0 32 9 0 0 0 8.0 37 46 98 37 0 28 10 0 0 0 7.0 168 46 91 42 0 23

11 0 0 0 6.0 98 51 91 32 0 20 12 0 0 0 5.0 32 51 91 28 . 0 20 13 0 0 .05 4.0 32 51 91 20 . 0 20 14 0 0 .18 3.0 28 51 84 16 0 18 15 .05 0 0 24 28 56 84 12 0 14

16 (J .03 0 5.0 25 56 91 9.0 0 14 17 0 0 0 3.0 25 56 91 5.1 0 14 18 0 0 0 41 20 61 105 5.1 14 19 0 0 0 7.3 20 61 119 l.B 16 20 0 0 5.1 4.0 20 62 119 1.0 14 98 1.0 12 21 c 0 1,170 40' 22 0 0 716 112 64 91 1.0 11 23 0 0 3.5 664 46 65 91 .90 10 24 a 0 230 970 42 66 70 .90 10 25 0 .23 5,040 2,550 37 67 70 .90 13

26 0 0 1,840 890 37 70 70 .90 1 10 27 0 0 706 340 37 61 70 .90 1 10 28 0 0 84 270 37 70 77 .90 1 10 29 0 0 23 . __... 37 77 56 .90 1 10 33 0 0 20 _____ 37 84 42 .90 1 10 31 0 18 32 42 1

DTAL 0 EAN 0 .002 .008 318 233 54.7 57.3 87.6 18.4 3.92 17.1 5. 0 91 119 51 16 37 KIN 0 0 0 0 2.8 20 32 42 .90 .90 8.6 2 C-FT 0 .1 .5 19,550

7,380

DISCHARGE , IN CUBIC FEET PER SECOND , WATER YEAR OCTD 1ER 1969 TO SEPTEMS ER 1973

DAY DCT JUL AUG S

1 2.2 .26 0 0 110 0 .08 .10 0 2 3.5 .39 0 0 92 0 .16 .08 0 3 2.8 .62 0 0 .25 0 .16 .08 0 4 2.2 .76 0 0 12 0 .20 .08 0 5 2.2 .26 0 0 12 0 .20 .08 0

6 1.8 14 0 0 .39 0 .16 0 0 7 1.0 97 0 0 .39 0 .16 0 0 8 .55 4.2 0 0 .26 0 .16 0 0 9 .55 1.8 0 0 .26 0 .16 0 0 10 .55 .76 3.2 20 .22 0 .16 0 0

11 .26 .76 .51 4.2 .16 0 .08 0 0 12 1.8 .55 .71 1.0 .16 0 .08 0 0 13 2.2 1.8 .16 .55 .16 0 .08 0 0 14 1.4 1.4 .44 .24 .08 0 .08 0 0 15 .76 .55 .76 .08 .OS 0 .08 0 0

16 .26 .55 7.1 0 0 0 0 0 0 17 .26 .26 .50 0 0 0 0 0 0 18 1.0 .16 .08 0 0 0 0 0 0 19 .39 .08 .08 0 0 0 0 0 0 20 .26 .08 .08 0 0 0 0 0 0

21 .16 0 0 0 0 .13 0 0 0 22 .76 0 0 0 0 .08 0 0 0 23 .76 0 0 0 0 .08 0 0 0 24 .55 0 0 0 0 .08 0 0 0 25 l.S 0 0 0 0 .08 0 0 0

26 .76 0 0 0 0 .08 0 0 0 27 .39 0 0 0 0 .08 0 0 0 28 .76 0 0 52 0 .OB 0 0 0 29 .39 0 0 . 0 .08 0 0 .10 30 .26 0 0 ______.16 .08 0 0 .05 31 .16 0 .OS o _____ 0 .05

.85 2.00 0 .42 .20 MEAN 1.05 4.21 0 .44 2.79 7.38 .028 .065 0 .014 .007 MAX 3.5 97 0 7.1 52 110 .13 .20 O .10 .10 MIN .16 0 0 0 0 0 0 0 0 0 0 155 454 1.7 4.0 0 .8 .4

WTR YR 1970 TOTAL 482.74 MEAN 1.32 110 MIN 0 AC-FT SANTA ANA RIVER BASIN 201

11066050 SANTA ANA RIVER AT COLTON, CALIF. LOCATION.--Lat 34°03'45", long 117°18'30", in San Bernardino Grant, San Bernardino County, on right bank 60 ft downstream from Southern Pacific Railroad bridge, 200 ft downstream from Warm Creek, and 1 mile southeast of Colton. DRAINAGE AREA.--726 sq mi [revised). I'ERIOD OF RECORD.--December 1961 to September 1966 (discontinued). CAGE.--Water-stage recorder. Altitude of gage is 940 ft (from topographic map). IXTREMES.--Maximum discharge during water year 1966, 25,000 cfs Nov. 22 (gage height, 10.87 ft); minimum daily, 16 cfs Sept. 4. Period of record: Maximum discharge, 25,000 cfs Nov. 22, 1965 (gage height, 10.87 ft), on basis of slope- area measurement of peak flow; minimum daily, 7.2 cfs Mar. 1-4, Apr. 7, 1962. FEMARKS.--Records poor. No gage-height record or stage-discharge relation indefinite for most of water year 1966 due to mining of 4,000,000 yards of sand from channel in vicinity of gage. Flow partly regulated by Big Bear Lake (see station 11049000). Natural streamflow affected by ground-water withdrawals or diversions for domes­ tic use and irrigation above station. See schematic diagram of Santa Ana River basin elsewhere in this report.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

CAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

229 202 112

6.1ZO ItllD 706

25 30 3,800 3* 38 21 26 1,300 534 38 19 185 40 33

698 13,136 6,604 1,610 1,390 1,005 2.5 438 213 51.9 49.6 32.4 25 6,120 3,600 534 416 121 SANTA ANA RIVER BASIN

11066460 SANTA ANA RIVER AT MWD CROSSING, NEAR ARLINGTON, CALIF. LOCATION.--Lat 33°58'04", long 117°26'46", in NE'eNE'tSWt sec. 30, T. 2 S. , R.5 W. , Riverside County, on left bank 300 ft upstream from MWD crossing, 0.7 mile downstream from Union Pacific Railroad bridge, 1.2 miles upstrea from bridge on Van Buren Boulevard, and 3.3 miles north of Arlington. PERIOD OF RECORD.--March to September 1970. GAGE.--Water-stage recorder. Altitude of gage is 645 ft (from topographic map). EXTREMES.--Maximum daily discharge during period, 48 cfs Mar. 11; minimum daily, 20 cfs Sept. 30. REMARKS.--Records poor. Flow partly regulated by Big Bear Lake (see station 11049000). Natural streamflow

matic diagram of Santa Ana River basin elsewhere in this report. DISCHARGE, IN CUBIC FEET PER SECOND, MARCH TO SEPTEMBER 1970

DEC JAN FEB MAR APR MAY JUN

6 26 31 22 22 21 2 5 26 31 22 22 21 2 8 26 31 22 23 21 2 4 27 30 22 23 21 2 1 27 29 22 23 21 2 8 27 28 22 23 21 2 7 27 27 22 23 21 2

2 27 26 22 23 21 2 1 28 25 22 23 21 2 2 29 25 22 23 21 2 5 28 24 22 23 21 2 8 27 24 22 23 21 2 1 27 23 22 23 21 2 9 26 23 22 22 ?1 2 6 27 23 22 22 21 2 3 28 23 22 22 21 2 30 29 22 21 21 22 2 27 28 22 21 21 23 2 26 27 22 21 21 22 2 25 24 22 21 21 22 2 23 23 22 21 21 21 2 23 22 21 21 794 810 655 683 656 63 26.5 26.1 21.8 22. 0 21.2 21. 31 32 22 23 23 2 21 22 21 21 21 2( 1,570 1,610 1,300 1,350 1,300 1,27 SANTA ANA RIVER BASIN

11066480 RIVERSIDE WATER QUALITY CONTROL PLANT AT RIVERSIDE NARROWS, NEAR ARLINGTON, CALIF. (Formerly published as 11-0665.S Sheehan ditch at Riverside Narrows, near Arlington) LOCATION.--Lat 33°57'53", long 117°27'26", in SE%NE%SE!» sec.25, T.2 S., R.6 W., Riverside County, at effluent end of chl ups ngton Prior to Oct. 1, 1966, at site 0.5 mile downstream. PERIOD OF RECORD.--October 1947 to September 1970. Prior to Oct. 1, 1965, published as 11-0665.5 Sheehan ditch at Riverside Narrows, near Arlington. GnGE.--Water-stage recorders and concrete controls for plants Nos. 1 and 2. Altitude of gage is 690 ft (from topographic map). Prior to Oct. 1, 1966, at site 0.5 mile downstream at different datum. EXTREMES.--Maximum and a feet pe ond, for the wate the following table:

Date Discharge Date Discharge Aug. 1966 Long period 1966 Dec. 25, 1966, Jan. 1, 1967 1968 Dec. 25, 1967, Mar. 31, 1968 1969 May 11, June 8, 1969 1969 31 Oct. 10, 1969 daily discharge, 32 cfs Apr. 6, 1969; minimum daily, 17 cfs May 11, June 8, 1969. RLMARKS.--Records good except those for Nov. 22, 1965, to Mar. 15, 1966, which are poor. No gage-neight record Nov. 22 to June 29, 1966. Discharge reported herein is total effluent from city of Riverside's Water Quality Control Plants Nos. 1 and 2, released to river 0.4 mile upstream from Santa Ana River at Riverside Narrows (see station 11066500). Water-quality records for the water year 1970 are published in reports of the Geolog­ ical Survey. COOPERATION.--Records prior to Dec. 20, 1969, furnished by city of Riverside's Department of Public Works.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

6.0 13

21 19 21 22 22 TO"AL HEllN 21.1 21.2 MA): Kill 18 6.0 AC--FT

KTIl VR 1966 TOTAL 4.904.C MEAN 13.* MAX 25 MIN 0 AC-FT 9,730 Z04 SANTA ANA RIVER BASIN

11066480 RIVERSIDE WATER QUALITY CONTROL PLANT AT RIVERSIDE NARROWS, NEAR ARLINGTON, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

23 24 22 18 23 2* 22 2* 24 23 25 26 21 24 23 20 24 24 20 24 24 20 25 23

MAX 25 25 26 27 27 HIM 20 19 18 IS 20 19 20 20 20 20 21 20

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

NOV DEC JAN FEB MAR APR MAY JUN JUL AUG

31 24 20 24 19 23 26 22

TOTAL 764 719 706 721 6B9 759 702 737 719 768 745 713 MEAN 24.6 24.0 22.8 23.3 23.8 24.5 23.4 23.8 24.0 24.8 24.0 23.8

WIN 21 21 19 20 20 19 20 20 21 . 21 21 20 SANTA ANA RIVER BASIN

11066480 RIVERSIDE WATER QUALITY CONTROL PLANT AT RIVERSIDE NARROWS, NEAR ARLINGTON, CALIF.--CONTINUED

AUG 24 24 22 20 24 24 26 26 18 24 25 24 22 22 23

25

MIN 19 AC-FT 17,330

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

26 28 27 27 27 25 28 26 25 23 22 26 26 26 27 27 24 28 2B 29 25 21 25 26 ------23 27 26 28 28 25 29 25 22 25 27 27 24 27 29 24 29

741 709 748 775 738 831 786 804 804 852 831 793 26.8 27.5 26.8 26.4 206 SANTA ANA RIVER BASIN

11066500 SANTA ANA RIVER AT RIVERSIDE NARROWS, NEAR ARLINGTON, CALIF. LOCATION.--Lat 33°57'53", long 117°27'SS", in SW;NE\SW»i; sec.25, T.2 S., R.6 W. , Riverside County, on right bank at downstream side of Van Buren Boulevard bridge, 1.8 miles downstream from Union Pacific Railroad bridge, 3.3 miles northwest of Arlington, and 12 miles upstream from Temescal Creek. DRAINAGE AREA.--855 sq mi (revised). PERIOD OF RECORD.--October 1927 to September 1970. Monthly discharge only for October 1928 to January 1929, December 1937 to April 1938, published in WSP 1315-B. GAGE.--Water-stage recorder. Datum of gage is 666.87 ft above mean sea level (levels by Riv rside County Engi- neer). See WSP 1928 for history of changes prior to Jan. 8, 1963. EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (500 cfs), water years 1966-70 Date Time Disch. G H. Date Time D sch. G.H. Date Time Disch. G.H. Nov. 17, 1965 0600 625 4 49 Apr. 11, 1967 1100 ,130 4.87 Jan. 21, 1969 1030 9,180 8.35 Nov. 23, 1965 0030 * 18,500 13 52 Apr. 22, 1967 0700 ,190 4. -92 Jan. 25, 1969 1330 41,000 15.23 Dec. 10, 1965 0315 840 5 22 Feb. 6, 1969 0600 8,000 9.25 Dec. 29, 1965 11,600 11 2 Nov. 21, 1967 0900 ,430 5.99 Feb. 25, 1969 1400 36,000 11.65 Dec. 18, 1967 1900 ,160 4.89 May 6, 1969 1300 1,110 6.35 Nov. 7, 1966 2115 2,130 5 26 Mar. 8, 1968 0900 * ,360 7.14 Dec. 3, 1966 1200 2,800 7 82 Apr. 2, 1968 0100 846 4.63 Nov. 7, 1969 0300 800 7.03 Dec. 6, 1966 2100 * 15,300 11 94 Feb. 10, 1970 2000 700 6.50 Jan. 24, 1967 2,770 6 08 Jan . 14, 1969 0900 990 5.25 Mar. 2, 1970 1000 1,670 6.76 Mar. 31, 1967 1100 500 4 29 A rmual minim am daily discharge, water years 1966-70 Wtr yr Date Discharge Wtr yr Date Di scharge 1966 Sept. 24, 1966 12 1969 Oct. 31 , 1968 29 1967 Oct. 17, 26, 1 966 11 1970 Oct. 4 , 1969 36 1968 Nov. 12, 1967 34 Period of record: Maximum discharge, 100,000 cfs 2, 1938, on basis of slope-area measurement of peak flow; minimum daily, 11 cfs Oct. 17, 26, 1966. Flood of Jan. 22, 1862, 320,000 cfs, by slope-conveyanc urement at site 9.3 miles upstream. Stage at that site was 5 ft higher than Mar. 2, 1938. REMARKS.--Records poor. Flow partly regulated by Big Bear Lake (see station 11049000). Natural streamflow side Water Quality Control plant released to river 0.4 mile upstream. See schematic diagram of Santa Ana

DISCHARGE! IN CUBIC FEET PER SECOND, WATER YE»R OCTOBER 1965 TO SEPTEMBER 1966

1 1 14 32 144 26 22 23 20 B 17 16 13 2 1 13 30 B3 33 22 23 20 7 16 16 14 13 27 30 7 15 IB 41 * 1 13 26 24 37 21 25 22 B 16 17 18 5 I 13 24 24 45 21 25 22 9 16 16 19

6 1 13 23 23 111 21 24 22 B IS 16 20 7 1 13 23 22 97 20 23 23 9 IS 15 19 B i 14 22 22 BC 20 25 22 B IS 14 19 9 I 8 16 16 IB 10 1 14 290 21 25 21 23 22 8 IS 18 19 11 1 14 4B 20 24 21 23 22 8 IS 16 IB 12 1 13 40 20 24 20 21 22 9 IS 15 17 13 1 13 34 19 23 21 23 21 9 14 15 21 1* 1 20 30 19 23 35 22 20 B IS 15 19 15 1 47 28 20 23 28 22 19 7 15 15 19 16 1 BS 41 20 23 24 21 IB 8 16 14 17 17 1 2C2 25 20 22 22 22 18 7 16 13 16 IB 1 77 22 21 22 21 21 19 8 IS IS IS 19 1 40 21 28 22 21 22 IB 8 14 14 17 20 1 2S 21 23 22 20 22 IB 7 15 15 15 21 1 24 21 24 21 20 20 34 7 IS 14 13 22 1 1,700 22 2S 21 20 21 20 B 16 15 16 21 21 21 IB 9 IS 14 14 2* 17 758 2G 25 21 21 21 IB 9 16 IS 12 17 9 17 IS 13

26 IB 100 22 68 23 25 20 IB 9 19 14 13 27 IB 60 28 24 23 23 21 19 9 20 13 14 28 18 SC 28 24 22 21 19 IB 7 19 13 15 29 1 45 3,500 25 . 21 20 IB 7 18 13 14 30 1 3B 1,000 58 22 19 18 7 IB 14 IS 31 1 359 36 22 16 13 513 MEAN 15. 354 190 31.6 32.9 22.1 22.1 20.3 1B.O 16.0 14.9 17.1 IB 41 MIN 1 13 20 19 20 20 19 17 17 14 13 12 4C-FT 968 21,070 11.710 1,950 1,630 1,360 1,310 1,250 1,070 982 916 1,020 ,710 ,440 SANTA ANA RIVER BASIN 207

11066500 SANTA ANA RIVER AT RIVERSIDE NARROWS, NEAR ARLINGTON, CALIF.--CONTINUED

DISCHARGEi IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

D*Y OCT NOV DEC JAN . FER MAR APR MAY JUN JUL AUG SEP

1 1* 16 IT 56 27 24 40 24 45 43 43 43 2 16 19 IT 41 26 24 100

6 104 43 8,800 42 22 20 25 23 44 44 39 42 7 23 442 2,950 35 36 26 23 23 44 43 42 42 8 14 337 336 36 31 25 21 23 44 42 43 43 ^ 16 36 130 39 26 25 24 23 44 ' 40 43 41 10 74 22 94 42 28 108 34 22 42 44 43 40

.1 33 25 65 38 26 120 415 22 40 44 43 42 i2 25 17 50 44 21 126 86 22 44 42 43 42 .3 23 19 55 38 26 124 41 22 44 44 39 42 .4 15 16 58 38 28 117 35 22 44 44 44 42 .5 17 18 44 32 23 50 35 22 44 42 44 42

16 14 16 37 27 28 40 38 22 44 40 41 41 17 11 19 27 23 30 35 38 22 42 43 42 38 18 12 18 27 22 26 30 65 21 40 43 43 41 19 13 22 25 22 23 25 220 21 44 43 41 .41 i'O 13 27 25 22 19 24 139 21 44 43- 39 41

i'l 14 25 23 23 3C 23 44 21 45 43 44 41 J2 18 20 25 500 28 22 422 20 44 42 43 41 «3 15 24 '27 700 19 21 100 20 44 40 44 40 J4 14 26 33 1,000' 22 20 60 20 43 44 44 38 25 14 24 37 483 23 20 5C 45 40 45 44 42

56 11 23 37 200 23 28 40 45 45 44 42 42 !7 15 21 38 100 21 27 35 43 44 44 39 42 28 18 16 38 50 25 31 30 41 44 44 43 42 i9 18 17 44 40 - 33 27 43 44 41 43 42 3 a 20 27 48 30 76 25 41 44 40 43 42 31 19 52 28 182 44 43 43

TCTAL 663 1,424 18,325 3,878 709 1,503 2,317. 830 1,305 1,320 1,314 1,234 MEAN 21.4 47.5 -591 . 125 25.3 48.5 77.2 26.8 43.5 42.6 42.4 41.1

MIN 11 16 17 22 '19 20 21 20 40 40 39 37

CAl YR 1966 TOTAL 26,301 MEAN 72.1 MAX 8,800 MIN 11 AC-FT 52,170

NOTE. STAGE-DISCHARGE RELATION INDEFINITE MAY 25 TO SEPT. 30.

DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 *

DAY OCT NDV OEC JAN FE8 MAR APR MAY JUN JUL AUG SEP

1 40 39 70 42 47 45 76 52 53 46 41 41 2 44 39 50 46 46 44 173 52 43 45 40 41

^ 43 38 51 46 43 45 49 49 44 45 39 43 5 42 35 51 46 46 45 49 47 43 45 4C 43

!> 41 38 50 44 46 48 54 51 45 45 41 43 1 41 38 70 43 46 56 51 49 48 44 42 43 3 39 38 60 44 45 945 55 49 46 44 41 45 ? 42 38 60 45 45 50 54 50 44 44 41 45 l: 42 38 60 44 44 48 55 50 46 43 41 45

11 42 36 63 45 41 51 55 48 46 43 42 46 II 41 34 63 45 45 50 54 45 46 42 45 45 11 41 38 62 44 45 51 52 50 46 42 45 46 l\ 40 38 61 41 45 51 49 49 48 41 43 48 1> 39 37 62 44 46 51 54 49 48 p 41 44 43

1<> 41 36 60 44 46 50 53 49 46 41 45 46 IF 41 36 58 44 44 47 53 ID 41 35 220 44 42 68 53 II 41 155 380 49 46 51 51 21) 41 548 90 48 45 50 49

2. 39 215 48 46 45 51 49 2.! 36 73 49 49 45 52 53 2 I 36 60 49 48 46 51 50 2'> 40 43 49 48 46 48 52 2'> 40 52 47 48 42 52 53

2li 40 52 50 48 44 52 53 2" 39 60 49 69 45 52 51 211 38 59 49 50 45 52 47 2** 37 56 62 47 46 48 52 3(1 39 111 60 4T 48 52 44 47 43 43 42 31 38 60 47 44 46 43 42 -----

T01 AL 1,248 2,154 2,262 1,441 1,303 2,438 1,716 1,501 / 1,405 1,372 1»357 1,311 HE/iN 40.3 71.8 73.0 46.5 44.9 78.6 57.2 48.4 < 46.8 44.3 43.8 43.7 MA), 44 548 380 69 47 945 173 52 53 68 49 48 HIM 36 34 47 41 41 42 47 600

1967 TOTAL 20,074 MEAN 55.0 MAX 1,000 MIN 19 AC-FT 39t820 1968 TOTAL 19,508 MEAN 53.3 MAX 945 MIN 34 AC-FT 38,690

. STAGE-DISCHARGE RELATION INDEFINITE FOR LONG PERIODS. SANTA ANA RIVER BASIN

11066500 SANTA ANA RIVER AT RIVERSIDE NARROWS, NEAR ARLINGTON, CALIF.--CONTINUED

, IN CUBIC

1 42 39 43 48 130 2,500 264 354 288 63 52 50 2 42 46 48 49 12C 1,500 496 3 42 46 48 49 112 1,200 53 51 4 42 45 46 49 108 B50 512 5 36 45 46 49 105 58 53 54

6 31 45 50 49 500 540 583 683 294 58 52 50

8 42 45 48 50 150 420 512 592 288 53 52 51 48 45 52 50 110 380 460 590 282 51 52 54

H 40 45 53 50 84 296 360 436 282 50 52 49 12

14 48 49 53 47 15 48 58 48 73 66 288 360 408 196 50 53 49

16 192 52 52 48 17 180 56 52 48

19 48 52 50 92 8C 50 20 48 52 55 21

23 118 55 SO 49 230 4C8 318 1C9 56 50 48

27 48 46 52 2, 000 4,500 215 280 214 86 55 50 47 28 48 275 224 76 54 5C 46 29

31 29 SO 140 - 258 258 52 53

52.4 I, 51.9 48.8 MAX 50 58 103 18, 200 18,600 2,500 601 683 MIN 45

NOTE. NO GAGE-HEIGHT RECORD JULY 7 TO AUG. 14.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

NOV DEC JAN FEB MAR APR MAY JUN JUL

52 50

MEAN 44.5 56.1 52.2 55.8 66.1 81.7 52.7 52.1 48.4 49.5 47.8 47.7 MAX 56 275 62 86 170 336 56 59 50 52 51 50 MIN 36 40 44 46 46 48 48 45 4S 45 45 44

. NO GAGE-hEIGHT PECOOD OR STJGE RELATION INDEFINITE FOR MOST OF YEAR. SANTA ANA RIVER BASIN

11067000 DAY CREEK NEAR ETIWANDA, CALIF. LOCATION.--Lat 34°11'06", long 117°32'20", in NWVWtSWt sec.8, T.I N., R.6 W., San Berna County, on left bank 0.5 mile downstream from confluence of two main forks and 4 miles north of Etiwa DRAINAGE AREA.--4.56 sq mi (revised). PERIOD OF RECORD.--October 1927 to September 1970. Combined records of creek and di ersion, October 1950 to Sep- tember 1970. Monthly discharge only for some periods, published in WSP 1315-B.

flume on div rsion. Altitude of gage 2,870 ft (from topographic map). See WSP 1315-B for history of changes prio to Sept. 3, 1938. AVERAGE DISCHARGE.--Creek only, 43 years, 4.15 cfs (3,010 acre-ft per year); median of yearly mean discharge 1.9 cfs (1,400 acre-ft per year). Average combined discharge of creek and diversion, 20 years, 5.33 cfs (3,860 acre-ft per year); median of yearly mean discharges, 2.4 cfs (1,700 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge («) and peak discharges above base (25 cfs), water years 1966-70 Creek o nly Wtr yr Date Time Discharge 13age height charge Gage height 1966 Nov. 22, 1965 1815 974 3.78 . 22, 1965 974 Dec. 29, 1965 1815 *1,740 4..90 . 29, 1965 *1,740 1967 Dec. 3, 1966 0930 589 3.47 . 3, 1966 590 Dec. 6, 1966 1645 *1,330 4.28 . 6, 1966 *1,330 Jan. 24, 1967 1915 63 2.26 . 24, 1967 67 Mar. 13, 1967 0515 108 2.33 . 13, 1967 108 1968 Nov. 19, 1967 1300 *346 2.91 . 19, 1967 *346 July 28, 1968 1745 53 2.20 y 28, 1968 53 1969 Jan. 22, 1969 061S 728 3.34 . 22, 1969 728 Jan. 25, 1969 1400 *9,4SO 9.90 . 25, 1969 *9,450 Feb. 6, 1969 . 360 - . 6, 1969 360 Feb. 25, 1969 - 2,500 _ . 25, 1969 2,500 1970 Feb. 28, 1970 1945 *25 _ 3.75 . 28, 1970 25 al minimum daily discharge, water years 1966-70 ek only Wtr y Date Discharge Date charge 1966 Oct. 1-7, 1965 .10 Oct. 2, 1965 .60 1967 Oct. 6, 7 13-15, 1966 .60 Feb. 2, 1967 1.5 1968 Sept.26, 19D8 .28 Sept.23, 25-27, 1968 2.1 1969 Dec. 18, 19, 1968 .17 Dec. 12, 1968 1.9 1970 Sept. 1-4, 7-12, 1970 1.2 Sept. 1-4, 7-12, 1970 1.4 Period of record: Maximum discharge (creek only), 9,450 cfs Jan. 25, 1969 (gage height, 9.90 ft), from rating curve extended above 340 cfs on basis of slope-area measurements at gage heights 3.78, 4.90, and 9.90 ft; no flow Oct. 5 to Nov. 1, 1950. (Combined): Maximum discharge, 9,450 cfs Jan. 25. 1969; minimum daily, 0.30 cfs for several days in 1961, 1963.

REVISIONS (WATER YPARS).--WSF 1315-B: 1929(M).

.10 )C 12 87 .9 2.5 .7 .70 )0 0 .13 10 I" 56 .9 2.6 .7 .70 0 0 P .1C 9.C 32 .fl ?.6 .6 .70 SO 0 c ! .10 c a. 2 2« .6 2.5 .6 .7C )0 0 . . 10 C 7.6 18 .8 2.4 .3 .70 ro 0

.10 t 6.6 15 1 2.1 .9 .70 0 0 . 1C C 5.4 I* 1 2.3 .1 .80 0 c . 0 .2C 0 5.5 12 .9 2.3 .1 .80 0 0 >, . .21 < k.J U .6 2.1 .2 .30 c 0 c , .20 0 7.7 9. ! .9 2.3 .2 .80 0 0

.?: C 6.2 fl. .6 2.3 .1 .BC 0 0 . .20 C b.8 a. .3 2.2 .1 .HO 0 c . r . .2: : 6.7 7. .2 2.2 .1 .80 n . c . .20 C 6.5 6 . .4 2.1 .0 .80 0 0 .20 1 . 6.2 6. .4 1.6 .0 .60 0 . (.' .

.29 i 5.0 6. .4 1.6 .90 .BC 0 0 . .< 3 4.5 6. .4 1.6 .9C .80 c . 0 .2C ? 1.1 5. .4 1.6 .90 .80 0 . 0 .2" 6 2.3 4. r. . r . .2'. .4 1.6 .90 .PC 0 1 2.2 4. .4 1.6 .8C .PC 0 . 0 . o

.20 9. .20 ? 1.4 4. .3 1.5 .7C .«.. 0 .2: 1 2 1.? 4. .? 1.5 .7C .60 c . 0 . r . ? .. 1 6 l.tl 4. .2 1.7 .70 .80 l~ . 0 «?~ 4 7.0 4. .4 1.6 .7: .n; c . c .

. ?- . 1. ' 4. .? 4.9 .7C .40 0 . 0 . . ? j 9 1. 4. .1 2.9 .7f> .SO 0 . 0 r . . ?? 1 1." 1. .2 1.0 .70 .30 0 . .21 -__ .?< K 5 11 3. 1.3 .7: .so 0 . 0 > 2-H 6. i.e .70 .RO c c . .11 1 It 5. 1.8 .HO c 1 1 '* .1H 1! H <4.7 12.

11067000 DAY CREEK NEAR ETIWANDA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

NOV DEC JAN FEB MAR APR BAY JUN JUL .8 l.C 3.2 9.0 15 .8 3.1 2. 2 .70 .3 .90 .8 .90 3.3 8.7 13 .5 2.9 2. 3 .70 .4 1 .2 5.7 3.4 8.3 13 .4 2.9 2. * .70 .6 .7 8.8 3.7 8.7 14 .2 2.9 -2. 5 .70 .6 .3 8.8 3.7 9.2 15 .2 2.9 2. 6 .60 .73 .8 8.6 3.8 8.6 16 .1 2.7 2. 7 .60 .4 .8 6.8 3.9 9.3 17 .1 2.6 2. 8 .70 1 .7 5.2 4.0 9.2 15 .1 2.5 2. 1 .70 .8 .0 5.1 4.1 9.3 13 .0 2.6 2. 10 .70 .1 .5 4.9 4.3 9.5 12 .8 2.7 2. 11 .70 .70 .0 4.7 5.3 12 11 .6 2.5 2. 12 .70 .70 .5 4.6 23 11 10 .0 2.6 2. .« 13 .80 .60 .2 4.5 89 11 10 .0 2.7 2. 1* 1.2 .60 .1 4.5 49 11 10 .8 2.7 2. 15 .80 .60 .1 4.2 31 11 9.8 .5 2.7 2. 16 .80 .70 .2 4.0 27 10 9.6 .4 2.7 2. 17 .70 .70 .1 3.9 24 11 9.5 .5 2.7 2. 18 .80 .70 . .1 3.8 21 13 9.4 .2 2.5 2. ,i 19 .80 .70 . .1 3.8 19 14 9.3 .1 2.5 2. , 20 .80 .70 .1 3.7 17 13 9.1 .6 2.5 2. 21 .80 .70 .1 3.5 16 14 8.8 .4 2.4 2. . 2? .80 .70 .2 3.4 14 19 8.6 .5 2.5 2. .< 23 .90 .70 .1 3.4 13 16 8.5 .5 2.5 2. 24 .90 .70 . \ 3.3 12 15 8.3 .4 2.6 2. 25 .90 .7C .0 3.2 11 15 B.I .0 2.7 2. 26 .0 .70 .0 3.1 10 15 8.0 .8 2.7 2. 21 .0 .70 . .6 3.1 9.7 15 7.8 .7 2.7 2. 28 .1 .70 .3 3.1 9.2 15 7.7 .6 2.7 2. .8 29 .1 .80 .1 8.8 16 7.6 .4 2.8 2. .8 3C .2 . 80 .0 8.3 16 7.5 .1 2.8 2. .8 31 .3 .8 2.9 2. .3 83.2 75. 5 .4 MEAN .84 1.64 I 5.9 3 50 4.41 14.9 12.1 10.6 5 28 2.68 2.4 I 95 MAX 1.3 10 306 14 8.8 89 19 17 .0 3.1 2. .2 MIN .60 .60 .80 .0 .90 3.2 8.3 7.4 .1 2.4 2. .8

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

NOV -DEC JAN FEB MAR APR MAY JUN JUL 1 1.0 .3 .3 1. 3.0 .7 2 .97 .0 .3 1. 2.9 .7 .69 .89 .33 .31 3 .91 .9 .3 I. 2.3 .7 .74 .88 .33 .37 4 .91 1 .8 .3 1. 2.0 .7 .78 .81 .33 .38 5 .90 .8 .3 1. 1.9 .7 .83 .80 .33 .36 6 .94 .8 .3 1. 1.9 .7 .85 .84 .33 .32 7 .93 .6 .3 1. 2.4 .6 .88 .90 .33 .30 8 .93 .6 .2 7. 3.2 .6 .86 .94 .33 .30 9 .92 .6 .4 5. 3.1 .6 .84 .86 .33 .30 13 .94 .6 .9 5. 3.1 .7 .83 .81 .32 .31 11 .94 .6 .8 4. 3.0 .7 .87 .79 .32 .32 12 .99 .4 .7 3. 3.0 .7 .86 .78 .32 .31 13 1.0 .1 .1 3. 2.9 .8 .84 .78 .32 .32 14 1.1 .2 .4 3. 2.9 .7 .84 .73 .32 .34 15 1.1 .4 .0 3. 2.7 .7 .83 .77 .32 .32 16 1. 1.1 .5 .6 2. 2.6 .6 .82 .77 .31 .35 17 6 .92 . 8 .0 2. 2.9 .6 .83 .76 .31 .34 18 6 .97 .2 .0 2. 2.6 .7 .83 .75 .31 .31 19 6 21 .2 .9 2. 2.5 .7 .89 .74 .31 .31 20 6 9.4 .2 .9 2. 2.4 .7 .89 .73 .31 .30 21 I. 7.4 .2 .9 2. 2.3 .7 .88 .73 .31 .30 22 1. 6.7 .1 .9 2. 2.3 .7 .88 .73 .31 .31 23 1. 6.1 .2 .9 2. 2.2 .7 .87 .72 .31 .32 24 7 5.6 .1 .8 2. 2.1 .7 .90 .72 .40 .33 25 7 5.1 .2 .7 2. 2.2 .6 .90 .73 .39 .29 26 1. 4.5 .2 .7 2. 2.1 .6 .90 .76 .38 .28 27 6 4.2 .6 .7 2. 1.8 .6 .96 .78 .39 .29 28 7 4.2 .6 .7 2. .95 .6 .98 3.1 .37 .31 29 1. 4.0 .4 .6 2. .90 .6 1.0 1.2 .30 .31 30 1. 7.2 .4 2. .77 .6 1.0 .49 .31 .33 31 1. .4 .38 .31 TOTAL 37. 81 102.87 143 .86 .86 .33 .32 MAX 1 .B 21 7 MIN 96 .90 3 0 1.1 1.2 1. > .77 .6 .69 .38 .30 .28 ! 141 4 51 53 20 19

MIN .90 AC-FT 4,060 SANTA ANA RIVER BASIN

11067000 DAY CREEK NEAR ETIWANDA, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

JUN JUL «UG SEP

13 10 8.3 6.1 .3: 24 66 32 15 13 10 8.1 6.1 3 .38 .36 .32 .27 22 58 32 15 13 1C 8.C 5.9 8.0 5.9 5 .41 .36 .31 .30 18 47 32 14 13 10 7.9 5.9

7.9 5.8 1 .43 .31 .31 .76 60 42 33 14 13 IS 7.7 5.8 13 10 7.7 5.7 13 9.9 7.7 5.6 13 9.6 7.7 5.6

11 .46 .27 .58 .36 25 35 30 14 12 9.6 7.7 5.6 12 9.7 7.7 5.4 13 .46 .45 .61 .81 18 33 30 14 12 9.7 7.4 5.5 ,4 .47 .37 .25 R.9 17 32 29 13 12 9.7 7.4 5.5 15 .49 .81 .20 4.2 16 31 26 13 12 9.4 7.4 5.4

:6 .44 .55 .2C 3.3 15 30 26 13 12 9.3 7.4 5.4 7 .42 .43 .19 3.2 32 29 25 13 12 9.3 7.3 5.4 18 .41 .41 .17 3.8 25 28 25 13 12 9.3 7.3 5.2 9 .40 .41 .17 3 2C 29 24 13 12 9.3 7.1 5.2 i"3 .39 .42 .20 5 18 33 23 13 12 9.3 7.0 5.2

.'1 .38 .36 .20 1 8 16 33 23 14 12 9.1 7.C 5.2 ;!2 .34 .36 . 2C 2 7 2C 32 23 14 12 8.9 6.9 5.1 :!3 .29 .66 .20 9 18C 33 22 14 12 8.9 6.7 4.9 .'4 .29 .99 .21 3 410 33 20 14 12 8.9 6.7 4.9 ,!5 .29 .70 2.8 4,0 C 820 33 19 14 11 B.8 6.7 4.8

,!6 .31 .74 5.6 2,2 0 400 33 19 14 11 8.8 6.5 4.7 ;!7 .31 .53 2.5 4 0 200 33 20 14 11 8.7 6.5 4.7 .!8 .31 .41 .55 0 115 33 19 14 11 B.6 6.5 4.6 ,!9 .32 .41 .43 5 33 19 14 11 8.5 6.4 4.5 1C .36 .41 .36 10 8.5 6.3 4.5

363 290 2 225.2 160.1

HkX .49 .99 5.6 4,070 820 75 34 22 13 10 8.3 b.l MIN .29 .27 .17 .27 15 28 19 13 10 8.4 6.3 i.5 518

CXL YR 1968 TOTAL 409.88 MEAN 1.12 MAX 7 MIN .17 AC-FT 813

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO SEPTEMBER 97^

C

1.8 .9 1.6 1.2 2 4.5 4.2 4.5 4.4 3.3 8.6 4.1 1.5 1.9 .9 1.6 1.2 1.8 .9 1.6 1.2 1.2 1.3

.9 1.5 1.3

1.5 L.2 L.2

B I 1.5 .2 , I 1.5 .2 2.0 .0 1.5 .4 14 4.5 4.6 4.5 4.3 4.3 5.1 1.7 1.7 2.0 .0 1.5 .6 1.5 .6

.8 1.5 .5 1.9 .8 1.5 .8 18 4.5 4.5 4.5 4.2 3.8 5.5 1.5 1.7 1.9 .8 1.5 .8 1.9 .8 1.5 .8 1.9 .9 1.5 .8

1.9 .9 1.5 .8 .9 1.5 .9

1.9 .8 1.4 .2

.7 1.4 2.1 29 4.3 4.5 4.4 3.4 4.9 1.6 1.7 1.8 .7 1.3 2.1 30 4.3 4.5 4.4 3.3 5.4 1.6 1.8 1.9 .7 1.3 2.1

45.8 48.6 KEAN 4.43 4.71 4.50 4.C5 4.01 6.03 1.82 1.66 1.91 1.87 1.48 1.62 AX 4.5 7.2 4.6 4.7 9.4 19 5.1 1.8 2.0 2.1 1.6 2.2 1.8 1.6 1.3 1.2 C-FT 272 280 277 249 223 371 108 102 114 US 91 96 SANTA ANA RIVER BASIN

11067000 DAY CREEK NEAR ETIWANDA, CALIF.--CONTINUED COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF DAY CREEK AND ETIWANDA WATER CO.'S DIVERSION NEAR ETIWANDA, CALIF., WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DISCHARGE, IN CUBIC FFET PFR SECOND, «ATER YFAR OCTOBER 1965 TO SEPTEMBER 1966

1 .0 .80 12 87 3.5 3.0 1.9 .6 2.0 10 56 7.6 6.3 5.0 3.3 3.0 1.9 .6 1.9

* .0 .90 8. ft 24 5 .0 .4C 8.2 18 7.7 5.8 4.7 3.3 2.8 1.9 .6 1.9

6 . 0 .90 7.5 15 11 5.8 4.9 3.2 2.9 1.9 .6 1.9 7 . o i.c 7.1 14 11 5.7 4.8 3.4 2.9 1.9 .5 1.8 a .0 I.C 7.1 12 11 5.7 4.8 3.6 2.9 1.8 .5 1.8 9 .0 l.r 7.1- 11 9.0 5.6 4.7 3.7 2.9 1.8 .5 1.8 13 . C 1.1 .5 1.8

11 . 'J 1.1 7.: 8.8 1.2 5.6 4.7 3.8 2.6 1.8 .6 1.8 12 . 3 l.l 6.<5 8.0 8.8 5.4 4.6 3.6 2.4 1.8 .6 2.C 13 . 0 1.1 6.7 7.8 7.4 5.3 4.5 3.4 2.3 1.8 .6 2.3 1* . C 1.5 6.5 8.3 7.1 5.5 4.3 3.2 2.2 1.8 .6 1.9 .6 1.8

16 1. 16 5.9 S.2 6.8 5.6 4.0 2.8 2.3 1. .5 1.9 11 . 0 73 .6 1.8 18 1. 3? 19 . 0 16 2: .80 11

.7 2.1 22 .S3 236 4.3 6.3 6.3 5.3 3.9 3.2 2.2 1. .7 2.0 23 .80 182 4.1 6.1 6.1 5.4 3.8 3.2 2.2 1. .7 1.9 24 .80 IC6 3.8 6.3 6.1 5.7 3.8 3.1 2.2 1. .6 1.9 25 .80 84

26 .80 80 27 .80 49 3.5 5.D 5.8 5.5 3.7 3.0 2.0 1. .7 2.0 28 .80 21 29 .70 18 532 6.1 3.7 3.1 1.9 1. .8 1.9 30 .70 15 291 7.5 3.6 3.1 1.9 1. .9 2.1 111 7.4

TOTAL 2

MAX 1.0 236 532 87 11 6.3 5.1 3.9 3.0 1. .1 2.5 3.5 5.0 2.8 1.9 1. .5 1.8

X 532 MIN .60 AC-FT 5.190

COMBINED DISO- ARGE, IN CUBIC FEET PER SECOND, OF DAY CREEK AND ETIWANDA WATER CO.'S DIVERSI 3N NEAR ETIWANDA, CALIF . , WATER YEAR OCTOI ER 1966 TO SEPTEMBER 1967

DAY nCT NOV VUG SEP

1 2. 2.2 Z.I2. .9 5.4 12 18 1 .9 .7 .5 2 2. 2.2 2.62. b .9 5.5 11 18 C .8 .7 .6 2. 2.4 110 .6 5.6 11 17 C .6 .5 2. 2.6 32 .1 5.9 11 18 O .8 .4 2. 2.6 57 .3 5.9 12 18 C .8 .2 2. 2.8 3C6 .9 5.9 11 19 0 .2 2 . 8.2 36 .9 6.0 12 20 C . .4 2 10 24 .8 6.1 12 19 C . 3 2. 7.9 20 .1 6.1 12 18 C . l 2. 2.8 19 .9 6.4 12 18 C .0 2. 3.1 17 .6 7.5 15 17 9.8 u .8 2. 2.9 16 .1 24 14 15 11 .8 2. 2.6 15 8 89 14 15 11 .8 2. 2.5 14 .7 49 13 15 9.8 ,7 2. 2.4 14 .6 31 13 14 9.5 .8 2. 2.5 12 .7 28 12 14 9.7 .9 1 1 2.4 10 .6 27 13 14 1C .8 2. 2.3 9. .6 25 16 14 9.6 .7 1. 2.2 9. .6 22 17 14 9.6 .7 1 1 2.2 8. .7 20 16 13 9.2 T l f 2.2 8. .6 19 17 13 8.9 m .7 I , 2.2 8. .1 17 22 13 9.1 . .6 I 1 2.2 7. 1 16 19 13 9.2 , .5 j ^ 2.1 7. 1 15 18 13 9.1 .8 .5 1 . 2.1 7. .2 14 18 12 6.7 .8 . 3 2. 2.1 6. .3 13 18 12 8.5 .6 .3 2. 2.0 6. .6 12 18 12 8.5 .6 .3 2. 2.C 6. .2 12 IB 12 8.4 ^ f . 1 2. 2.1 6. . 9 11 19 12 8.2 .8 . 1 2. 2.1 5. . 7 11 19 12 8.0 7 .1 31 . 6 .3 TOTAL MEAN 19 5 61 5 MAX 2. 10 30 18 9 4 89 22 20 11 .9 .7 MIN 1 B 2.0 2. .7 1 5 5.4 11 11 6.0 .6 .1 AC-FT 13 > 178 1,61 19 3 SANTA ANA RIVER BASIN

11067000 DAY CREEK NEAR ETIWANDA, CALIF.--CONTINUED COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF DAY CREEK AND ETIWANDA WATER CO.'S DIVERSION NEAR ETIWANDA, CALIF., WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

1 2 4.8 3 4 4.7 3.8 5 4.7

6 7 8 9 2.2 10 3.8 11 12 3.7 5.0 3.4 4.2 5.2 4.3 3.9 3.2 2.5 2.6 2.2 13 4.2 4.2 3.9 3.1 2.5 2.7 2.7 14 15

16 17 3.8 18 19 3.7 22 2C

21 3.8 22 23 2.1 24 3.8 5.7 4.4 3.4 3.8 3.8 3.3 3.3 3.0 2.3 2.6 2.2 25 2.1

26 2.1 27 3.8 2.1 28 3.8 4.8 29 3C 4.2 8.2 31 4.0 4.1 3.8 3.8 3.1 3.3 2.3 'OIAl 128.1 158.4 16C.1 115.1 115.2 133.6 115.1 102.3 92.5 82. e 84.3 69. D MEAN 4.13 MAX 4.9 22 6.2 4.4 5.1 8.7 4.7 3.9 3.6 4.5 3.1 2.7 HIM 2.1 .1C-FT 754 314 318 228 229 265 228 203 183 164 167 137

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF DAY CREEK AND ETIWANDA WATER CO 'S DIVERSION NEAR ETI1»ANDA, CALIF . , WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

HAY OCT NOV DEC

1 2.4 2.4 2.3 2.2 32 75 32 22 11 0 8.3 6.1 2 24 66 32 15 13 8.1 6.1 3 2.5 2.4 2.7 2.0 22 58 32 15 13 0 8.C 5.9 4 7.5 2.4 2.1 2.0 20 52 32 15 13 l'.? 5.9 5 2.4 2.4 2.1 2.0 18 47 37 14 13 5.9 6 7.3 2.4 2.1 2.0 11C 45 32 5 13 7.9 5.8 7 7.4 2.2 2.3 60 42 33 4 13 7.7 5.8 8 2.5 2.1 2.1 2.4 5C 40 34 4 13 C 7.7 5.7 9 2.5 7.2 2.0 2.2 40 38 34 4 11 9.9 7.7 5.6 10 7.5 2.1 2.0 2.1 3C 16 34 4 13 6.6 7.7 5.6 11 7.5 7.1 2.1 7.1 25 35 JC 4 12 6.6 7.7 5.6 12 7.4 2.2 1.9 2. 1 2C 34 29 4 12 9.7 7.7 5.4 13 7.4 '.2 2.1 2.7 18 33 30 4 12 9.7 7.4 5.5 14 2.7 7.2 8.9 17 32 79 1 12 9.7 7.4 15 2.6 3.3 2!: 4.2 16 31 76 13 12 9.4 7.4 5.4

16 2.4 2.8 2.1 3.3 11 33 26 13 17 1.3 5.4 17 7.4 2.5 2.1 3.7 12 29 75 11 12 <3.3 7.1 5.4 IH 7.4 7.4 3.3 75 78 75 11 19 7.1 2.4 7.1 11 2t 79 24 11 12 7.1 5.7 2 7.3 2.1 2.1 14 18 33 23 11 1? 7. . 5.7

21 7.3 2.1 2.1 15H 16 33 21 14 7.6 2.2 2.1 2.1 2">7 23 14 12 fc.'i 5.1 21 7.1 7.4 ?. '. 79 : * 33 7? 14 12 8. ) 6.7 4. ) 24 7.5 2. ' 71 41< IS 14 6. 7 4. 1 4." 25 7.1 7.4 1 ) 11 1.8 fc. 7 4.S

ft 7.1 2.2 5.6 4 j 53 14 11 .. J '.1 2.4 1.7 71 1 14 11 4. / 2. 1 2.1 7.6 91 1 1 6 ^ 1 1 2.7 2.3 2.'. 65 14 11 1.5 2.1 ?.4 50 - -- 2 14

''>£ 71.1 ? , ' 7 1 1 , 1 7 1 4 )h 1 f C . 1 'fAM 2.16 14.1 '.17 2. 36 'It.' !7.fl 1 ' 2.7 1. ! 4,' 1. 1 1 *\ ^ '. I 1.9 19 13 1 '

1968 TI1TA1 1, 126. ) M- 1 N 1.>. " j;^T- ;-;.; AL-fT > i74 '. f K V 3 1969 KjTAL 1 1, 147. 7 "F X >; V.2 n <\r-f r SANTA ANA RIVER BASIN

11067000 DAY CREEK NEAR ETIWANDA, CALIF.--CONTINUED COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF DAY CREEK AND ETIWANDA WATER CO.'S DIVERSION NEAR ETIWANDA, CALIF., WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

I 4.5 4.3 4.5 4.4 1.3 19 5.1 2.9 2.2 2.2 1.9 1.4 5.0 2.7 2.2 2.2 1.9 1.4

4.6 2.6 2.2 2.2 1.9 1.5

1 4.5 4.7 4.6 4.4 5.9 5.4 2 4.4 4.6 4.5 4.} 4.7 5.2 3.5 2.3 2.4 2.4 l.B 1.4

3.1 2.2 2.J 2.1 1.7 2.2

3.2 2.1 2.2 2.1 1.6 2.3

0 4.3 4.5 4.4 3.3 5.4 2.9 2.1 2.2 2.1 1.5 2.2

X 4.5 7.2 4.6 4.7 9.4 19 5.1 2.9 2.4 2.4 1.9 2.5 C-fT 272 280 277 249 223 371 SANTA ANA RIVER BASIN

11068000 SANTA ANA RIVER AT AUBURNDALE BRIDGE, NEAR CORONA, CALIF.

LOCATION.--Lat 33°S5'2S", long 117°35'50", in La Sierra (Yorba) Grant, Riverside County, on downstream end of

DRAINAGE AREA.--1,010 sq mi (revised). PERIOD OF RECORD.--May 1930 to September 1966 (irrigation seasons only), October 1966 to September 1968 (discon­ tinued).

GW5E . --Water- s i tes with in 1,00 0 ft of bridge at different da.turns . May 1946 to Sept. 12, 19 d 1 ffe rent datum. Sept . 12, 1961, to Oct. 6, 1966, on right bank at different datum. EXTREMES charge in cub 1967- 68 ar wing table: Maximum Minimum dai iy Wtr T Date Discharge G. H. Date Discharge 1367 Dec. 7, 1966 15,000 9. 60 July 28-31, 1 967 14 1368 Mar. 8, 1968 3,100 7. 60 July 12, 1968 18 Pe riod of recoird: Maximum discharge, 15,000 cfs Dec. 7, 1966 (gage height, 9.60 ft); min Imum daily, 14 cfs J u iy 28-31 , 1967. REMARKS. --Rec ear Lake (see station 11049000). Natura 1 flow is affected ds fo r the w ater year 1968 ar e published i n rep orts of the Geological Survey. Water di verted into Durkee d i tch , 0.2 w in ditch are given in table b e low COOPERATION. - -Ninety

asurements, per second, of flow in ditch, water years 19 66-68 Feb. 24, 1966 . ... 1. 53 July 21 , 1967.... . 65 Apr. 16, 1968.... 3. 42 Aug. 1, 1968. ... 1.67 Anr. 71 31 Aug. 3 ...... 2. 23 25...... 3. 08 7...... 1.90 May 19 .... 0 30 ...... 2. 43 30...... 2. 93 14...... 1.35 Fsb. 28, 1967 .. .. 0 Oct. 9 2 77 May 7 ...... 2 . 55 22...... 2.21 Mar. 79 ... . 1. 50 Nov. 7 ...... 5. 96 13...... 2. 28 28...... 1.81 May 1 . . .. 4. 28 Jan. 2 , 1968.... 3. 00 22...:...... 2. 08 Sept . 5...... 1.96 IS, . . .. 1. 61 Feb. 2 ...... 3. 81 June 17...... 2. 28 12...... 2.16 June 1 .. .. 2. 95 Mar. 27 ...... 3. 54 July 5...... 2. 25 18...... 2.63 17 . ... 2. 64 Apr. 4 ...... 3. 08 11...... 1. 85 25...... 1.93 July 7 .. .. 2. 22 10 ...... 3. 18 23...... 1. 80 ni SCHAR DW OCT NOV JUN JUL AUG SEP SANTA ANA RIVER BASIN

11068000 SANTA ANA RIVER AT AUEURNDALE BRIDGE, NEAR CORONA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SFCONO, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

NUV DEC JAN FEB MAR APR MAY JUN JUL 90 110

MEAN 2B.3 41.5 512 107 43.5 53.4 65.9 39.6 30.4 20.9 19.8 23.9 MAX 38 100 6,910 660 50 100 ISO 45 35 25 30 30 MIN 15 27 37 37 34 38 38 34 25 14 15 20

L 30,305 MEAN 83.0 MAX 6,910 MIN 14 AC-FT 60,110

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

NOV DEC JAN FEB MAR APR MAY JUN JUL

31

TOTAL MEAN MAX MIN AC-FT SANTA ANA RIVER BASIN

11069000 LAKE HEMET NEAR IDYLLWILD, CALIF. apstream fa ;s upstream

DIAINAGE AREA. --65. 6 sq mi. PIRIOD OF RECORD. --October 1961 to September 1970. G/GE.--Nonrecording gage. Datum of gage is 4,201.5 ft above me level (levels by Lake Hemet Mun District). li>TREMES.--Maximums and minimums (contents in acre-feet, elevation in feet) f the water years 1966- tained in the following table: Maximum observed Minimum observed Wtr yr Date Contents Elevation Date Contents Elevation IS 66 May 27 to June 4, 1966 5,941 . 314.33 Nov. 1* , 196TS 1,529 4 287.83 1S67 June 17, 19-24, 1967 9,774 327.58 Nov. 7 , 1966 4,59] 4 308.33 IS 6 8 May 13 to June 18, 1968 7,842 ' 321.50 Nov. 17 -20, 1967 6,486 4 316.50 1969 Feb. 25, 1969 13.88C 337.58 Nov. ( -15, 1968 6.34C 4 315.92 1970 Apr. 29 to June 3, 1970 11,050 331.00 Sept. 30 , 1970 8,320 4 323.17 on, 4,337.58 ft) ; minimum observed, 264 acre-ft Nov. 19, 1961, Nov. 19, 1962 (elevation, 4,266 .9 ft). RE MARKS. --Lak e is formed by a single-arch dam. Dam was completed to a height of 110 ft in 1893, rai sed to 122.5 ft i n 1895, and to 135 ft in 1923. e Hemet

in this report. COOPERATION. - -Elevations furnished by Lake Hemet Municipal Water Distri ct.

MONTHEND ELEVATION AND CONTENTS, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1970

DATE ELEVATION CONTENTS CHANGE IN DATE ELEVATION CONTENTS CHANGE IN (FEET)t (ACRE-FEET) CONTENTS (FEET)t (ACRE-rEET) CONTENTS (ACRE-FEET) (ACRE-FEFT)

...... 4,301.08 3,223 6,380 0 ...... 4,305.58 4,042 +170 :AL YR 1965 ...... -378

FEB. 28...... 4,311.83 5,351 +656 FEB. 28...... 13,180 +3,490 MA*. 31...... 12,670 -510 APU 30...... +161 APR. 30...... 13,430 MA< 31...... +39 MAY 31...... 13,400 13,400 0 -370 JU.Y 31...... -314 JULY 31...... 4,335.67 13,030 AUi. 31...... 4,310.92 5,145 -361 AUG. 31...... 12,000 -1,030 10,840 -1,160

'VTR YR 1966 ...... - +4,225 OCT. 31...... -840 +35 NOV. 30...... 4,327.83 9,860 -140 DE'I. 31...... 4,319.67 7,328 +2,650 DEC. 31...... 9,920 +60 I:AL YR 1966 ...... - +3,370 JAN. 31, 1967 ...... 4,321.25 7,769 +180 FEli. 28...... 10,260 +160 +660 API:. 30...... 11,050 +130 0 ...... 4,327.25 9,658 10,540 -510 9,770 -770 AUI.. 31...... -651 AUG. 31...... 4,325.58 9,100 -670 SEPT. 30...... 8,340 -760

HTR YR 1967 ...... +2,674 WTR YR 1970. - -2,500

DC". 31...... -677 t ELEVATION AT 0800. NOV. 30...... -197 DEI . 31...... +287 1 AL YR 1967 -405

...... 4,319.75 7,349 +204 ...... 4,320.50 7,557 +208 APF . 30...... +212 MA1 31...... 4,321.50 7,842 +73 ...... 4,320.83 7,649 -193 JUIY 31...... -300 ...... 4,318.42 6,990 -359 SEFT.30...... 4,317.00 6,615 -375

VTR YR 1968 ...... - -895 218 SANTA ANA RIVER BASIN

11069300 SOUTH FORK SAN JACINTO RIVER TRIBUTARY NEAR VALLE VISTA, CALIF. LOCATION.--Lat 33 0 43'20", long 116°48'00", in Ws sec.20, T.5 S., R.2 E., Riverside County, 6 ft upstream from

DRAINAGE AREA.--2.20 sq mi. PERIOD OF RECORD.--October 1961 to February 1967. Annual maximums, water years 1968-70.

AVERAGE DISCHARGE.--5 years (1961-66), 0.058 cfs (42 acre-ft per year]. EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water yea 1966-70 are contained in the following table:

Wtr yr Date Discharge G.H. Date 1966 Nov. 22, 1965 36 5.56 Most of ti 1967 Dec. 6, 1966 36 5.53 1968 Nov. 21, 1967 8.7 3.96 1969 Feb. 25, 1969 51 6.93 1970 Aug. 16, 1970 13 3.97 Period of record: Maximum discharge, 36 cfs Nov. 22, 1965, Dec. 6, 1966; no flow for most of time in each year. REMARKS.--Records go district office.

DISCHARGE, IN CUBIC FEET PER SECOND, OCTOBER 1965 TO FEBRUARY 1967

JAN. 17, 1966... .10 MAR. 1, 1966... .20

.10 .10 .10

JAN. 22, 1967.

.10 .10 1966... 1.0 .10 .10 .10 .10 .10 .10 .10 .10 .10 .10 .10 .10 .10 .10 .10 .10

NOVEMBER 1965. 13.90 .46 DECEMBER...... 12.00 .39 CAL YR 1965. 66.30 .18

JANUARY 1966.. 5.20 1.0 .17 FEBRUARY...... 18.90 3.5 .68 MARCH...... 3.70 .20 .12 7.3 APRIL...... 2.30 .10 .077 4.6 HTR YR 1966. 56.00 8.6 .15 111

NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. SANTA ANA RIVER BASIN

11069500 SAN JACINTO RIVER NEAR SAN JACINTO, CALIF.

IRAINAGE AREA.--141 sq mi. FERIOD OF RECORD.--October 1920 to February 1927, March 1927 to September 1970. Records since Oct. 1, 1969, and diversions October 1948 to Septembe 1970. Monthly discharge only for October 1920 and July 1926, published in WSP 1315-B.

nonrecording gage on pipeline. Datum of gage is 1,982.75 ft above mean sea level (Corps of Enginee ch mark). See WSP 1928 for history of changes prior to Jan. 24, 1948. Prior to Oct. 1, 1969, at site 350 ft downstream at present datum.

EXTREMES.--Maximums and (discharge cubi feet per second, gage height in feet). Annual maximu discharge (*) and peak discharge bas (100 cfs), water years 1966-70 River oniy Combined Wtr yr Date Time D ischarge Gage height Date Discharge Gage height 1966 Nov. 22 1965 2400 - *6,300 10.40 Nov. 22 , 1965 *6,310 Dec. 10 1965 0600 110 .23 Dec. 10 , 1965 110 Dec. 29 1965 2330 890 .OS Dec. 29 , 1965 906 Feb. 6 1966 2400 148 .42 Feb. 6 , 1966 162 - 1S67 Dec. 3 1966 1900 1,350 .39 Dec. 3 , 1966 1,350 - Dec. 6 1966 2100 5,720 .80 Dec. 6 , 1966 *5,720 - Jan. 25 1967 0400 178 .13 Jan . 25 , 1967 206 Mar. 14 1967 0100 400 .91 Mar] 14 , 1967 433 - May 10 1967 1000 120 .15 May 10 , 1967 162 July 13 1967 1400 420 .02 July 13 , 1967 475 Aug. 23 1967 1900 189 .28- Aug. 23 , 1967 195 - Sept. 2 1967 1700 794 .81 Sept . 2 , 1967 800 Sept. 29 1967 1630 172 .43 Sept .29 , 1967 193 l'>68 Mar. 8 1968 1230 *118 .24 Mar. 8 , 1968 146 Apr. 2 1968 1630 112 .21 Apr. 2 , 1968 151 - l')69 Jan. 14 1969 1400 296 .88 Jan. 14 , 1969 313 Jan. 21 1969 1900 872 .02 Jan. 21 , 1969 881 Jan. 25 1969 1300 *7,410 1 .15 Jan. 25 , 1969 »7,420 Feb. 6 1969 1800 388 .92 Feb. 6 , 1969 409 Feb. 26 1969 2200 4,080 8.50 Feb. 26 , 1969 4,080 Mar. 21 1969 1800 264 4.74 Mar. 21 , 1969 267 1H70 Mar. 2 1970 0915 506 11.52 Mar. 2 , 1970 *523 Annual minimum daily discharge, water year s 1966-70 River only Combined W r yr Date Discharge Date Discharge 1 '66 Long periods 0 June 26 , 1966 1.5 1 '67 do . 0 Nov. 16 -21, 27 -30, 1966 1.0 1 '68 do. 0 Dec. 3 , 1967 2.3 1 '69 do. 0 Dec. 25 , 1968 .50 1 '70 Many days 0 Feb. 5 , 1970 2.2 Pe riod of record: Maximum di scharge (river only), 45, 000 cfs Feb. 16, 1927, on basis of slope -area meas- ureme Jan. 25, 1969; no flow in 1951-52, 1957. RE MARKS . station 11069000) . Lake He met Municipal Water Distr let's upper c 1 diver ts 4.0 miles above station and since Oct. 1, 1969, lower canal diverts 50 ft downstream for irrigatio Fairvi ew Land and Water Co. 's pipe- for period of record. COOPERATION.--Records of Fairview Land and Water Co.'s pipeline furnished by Lake Hemet Municipal Water District. REVISIONS (WATER YEARS).--WSP 881: 1938. WSP 1635: 1950. WSP 1928: Drainage area. SANTA ANA RIVER BASIN

11069500 SAN JACINTO RIVER NEAR SAN JACINTO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

FEB MAR APR MAY JUN JUL AUG SEP > 1 0 22 55 .50 2.9 .10 2 0 14 45 1.0 2.1 0 .10 3 0 7.5 37 .70 1.8 0 .10 4 0 4.5 32 .80 2.3 0 .10 5 0 3.8 ?7 .70 2.6 0 .10 6 0 3.0 19 41 2.6 0 .10 7 0 1.0 15 73 3.0 0 .10 8 0 .30 14 32 3.0 0 .10 9 0 27 11 17 2.9 0 .10 10 0 73 7.5 11 2.9 0 0 11 c 46 5.8 7.2 2.9 0 c 12 0 41 5.8 6.6 3.0 0 0 13 0 24 3.8 5.2 4.0 0 0 U 0 10 3.4 4.8 3.8 0 r 15 c 10 3.0 4.8 2.4 0 0 16 1.1 10 4.9 4.3 1.8 0 c 17 14 8.8 10 4.0 1.2 0 0 18 7.0 7.8 6.? 4.0 .50 0 0 19 3.3 7.2 2.4 3.9 .40 0 c ZC 1.4 4.5 2.0 3.6 .50 0 0 21 1.1 1.1 .70 3.6 .40 0 0 22 1,270 9.6 .20 4.0 .20 0 0 23 2,6 0 6.0 .30 3.8 C 0 0 11 3 2 2.9 .40 3.6 .40 0 0 25 0 0 26 1 7 2.2 .40 3.6 1.9 0 0 27 3 .80 .40 3.4 1.2 0 0 28 3 .30 .40 3.2 .40 0 0 29 7 95 .40 .10 .10 0 30 9 211 1.9 0 .10 0 31 81 2.8 0 .10

TOTAL 56.20 0 .30 .90 0 0 0 MEAN 0 164 23.8 10.3 9.10 1.81 0 .010 .030 0 0 0 MAX 0 2,630 211 55 73 5.0 0 .10 .10 0 C 0 MIN 0 0 .30 .20 .50 0 0 0 0 0 0 0 AC-FT 0 9,760 1,460 631 505 111 0 .6 1.8 0 0 0

WTR YR 1966 TOTAL 6,290.90 MEAN 17.2 MAX 2,630 MIN 0 AC-FT 12,480

DISCHARGE, IN CUE 1C FEET PER SECOND , MATER YEAR OCTOBEK 1966 TO SEPTEMBER 1967

DAY OCT NOV UCI»~"

1 0 21 33 .10 23 65 8.1 0 1.8 .10 2 0 21 23 1.1 26 63 6.0 0 .20 87 3 255 16 18 1.6 22 65 5.0 0 .20 31 4 146 14 15 3.8 26 65 3.4 0 .20 8.5 5 1,960 14 14 4.8 46 60 2.9 0 .20 5.0 6 3,300 12 13 5.5 28 55 2.6 0 .20 9.5 7 1,420 9.6 12 5.0 29 53 1.3 0 .20 3.6 a 517 5.2 11 4.3 24 54 .40 0 .20 .10 9 206 .70 12 2.6 19 57 .40 0 .20 0 10 138 .50 12 3.5 11 94 .40 0 .20 0 11 104 .40 11 10 19 66 .30 14 .20 0 12 75 .30 10 11 32 53 .30 6.6 .10 0 13 57 .20 9.6 SB 40 44 .50 59 .20 0 1* 54 .20 9.6 196 51 36 .30 28 .10 0 15 49 .20 9.2 85 52 32 .10 14 .20 0

16 46 .10 4.8 63 46 28 .10 6. .10 0 17 44 .10 .70 65 49 25 .10 3. .20 0 18 43 .10 .20 58 54 22 0 1. .50 0 19 38 .10 .20 45 67 20 0 . 0 .20 c 20 33 .10 1.0 39 65 16 C . 0 .10 0 21 31 .10 1.6 39 67 14 0 .20 .10 0 22 29 5.2 .10 31 108 13 0 .20 17 0 23 29 34 1.3 28 87 12 0 .20 49 0 24 27 22 5.2 27 83 9.2 0 .20 31 0 25 27 131 7.2 26 75 11 0 .20 4.0 0 26 29 57 6.9 22 78 10 0 .20 .50 0 27 24 46 2.7 19 87 9.2 0 .80 .50 0 28 19 41 .10 19 83 9.6 0 3.8 .40 0 29 IB 33 _ » » 21 82 12 0 2.B .30 16 30 19 36 ...... 19 72 12 C 2.8 .10 2.0 31 22 43 22 10 .30 TOTAL 0 0 8,759 162.80 MEAN 0 0 2B3 18.2 8.73 30.2 51.7 35.3 1.07 4.74 3.51 5.43 MAX 0 0 3,300 131 33 196 10B 94 8.1 59 49 87 MIN 0 0 0 .13 .10 .10 11 9.2 0 0 .10 0 AC-FT 0 0 17,370 1,120 4B5 1,860 3,080 2,170 64 292 216 323 SANTA ANA RIVER BASIN

11069500 SAN JACINTO RIVER NEAR SAN JACINTO, CALIF.--CONTINUED

DISCHARGE! IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

[AY

1 .60 .10 3.2 15 5.C l.C .30 .10 000 .20 2 .50 .10 .10 14 5.B .10 39 .10 000 .20 3 .50 .10 .10 12 7.8 .10 19 .10 000 .20 4 .50 .13 .10 7.2 7.B .10 10 .10 000 .20 5 .40 .20 .10 4.5 7.2 .10 4.5 .10 C 0 0 .20

6 .40 .10 .10 1.6 6.0 .10 2.0 .10 0 0 0 .70 7 .40 .10 .10 1.2 5.6 .70 .70 .10 000 .20 8 .30 .10 .10 1.0 5.5 37 .20 .10 030 .10 9 .30 .1C .10 1.0 6.3 17 .10 .10 0 3 3 0 10 .30 .10 .10 1.0 6.9 9.6 0 .10 0000

11 .30 .10 .10 1.0 7.2 5.5 0 .10 0000 12 .30 .10 2.8 .80 6.9 1.5 0 .70 0000 13 .30 .10 .10 .80 9.2 .20 0 1.8 0000 14 .30 .10 .10 .70 8.8 .10 .10 .19 0 0 0 0 15 .20 .10 .10 .50 7.8 .10 .40 .10 0 0 0 0

16 .20 .10 .10 .70 6. .10 2.0 .10 0 0 0 3 17 .30 .10 .1C .50 6. .10 9.0 .10 0 0 0 C 18 .20 .10 6.0 .43 8. .10 .90 00000 19 .20 4.9 12 .30 7. .10 .1C 0 0 0 0 0 20 .20 10 10 .2C 6. .10 .10 00000

21 .20 3.9 8.5 .20 5. .10 .10 00000 22 .20 2.0 9.2 .20 4. .10 .20 0 C 0 .10 0 23 .20 .40 12 .10 4.0 .10 .20 000 .10 0 24 .20 .20 14 .10 3.6 .10 .20 0 .10 0 .10 0 25 20 .10 18 .10 3.2 .10 .10 0 .10 0 .20 0

26 .20 .10 23 .10 3.0 .10 .10 0 0 0 .20 0 27 28 .20 .1C 23 5.7 3.0 0 .10 0 .10 9.6 .20 0 29 .20 .10 22 3.1 2.9 0 .10 0 .10 .20 .20 0 30 .20 .50 19 5.0 .10 .10 0 0 0 .20 0 31 0 0 .20

MEAN MAX .60 10 24 15 9.2 37 39 1.8 .10 9.6 .20 .20 MIN .10 .10 .10 .10 2.9 0 000000 AC-FT 178 7.9 1.0 19 3.4 3.0

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 196B TO SEPTEMBER 1969

CAY

1 0 .03 82 513 198 106 55 .62 .04 .02 2 0 .04 75 389 160 104 52 .44 .03 .01 3 0 .04 67 318 192 104 48 .32 .03 .01 4 5 0 .04 7B 223 178 138 45 .49 .03 .01

6 0 .04 193 172 228 124 44 .32 .03 .02 7 .01 .04 130 160 180 122 42 .22 .03 .02 a .01 .03 87 152 175 116 41 .19 .03 .01 9 .01 .03 73 150 170 100 45 .17 .03 .01 10 .02 .04 72 172 1S2 102 47 .17 .02 .01

11 .02 .04 72 216 150 98 47 .17 .02 .Cl 12 .02 .04 70 204 152 96 43 .19 .02 .01 13 .02 .04 69 198 15S 88 38 .17 .02 .01 14 .02 .03 11 66 186 158 82 3 .17 .02 .01 15 .02 .05 6 66 178 148 82 3 .15 .02 .04

16 .02 .04 1 66 175 142 BO 1 .15 .02 .03 17 .02 .04 .0 63 178 138 76 .5 .19 .02 .03 18 .02 .04 .4 67 186 132 76 .8 .22 .02 .02 19 .02 .04 2 69 201 124 76 .2 .17 .02 .02 20 .02 .04 88 68 204 124 76 .9 .17 .02 .03

21 .01 .04 405 70 219 22 .01 .04 183 72 207 122 76 .7 .13 .02 .02 23 .02 .04 62 73 19S 118 76 .8 .13 .02 .02 24 .02 .04 813 S90 195 114 76 .6 .13 .02 .01 25 .03 .04 3,060 2,380 183 112 73 .1 .11 .02 .01

26 .02 .01 1.130 1,880 175 110 72 .5 .11 .02 .01 27 .02 0 553 937 183 110 69 .0 .11 .02 .01 28 .02 0 259 670 195 108 69 .5 .11 .02 .01 29 .01 0 152 201 10B 66 .1 .36 .02 .01 30 .01 0 114 213 106 60 .90 .OS .02 .01 31 .03 94 222 55 .05 .02 TOTAL PAX .03 .05 0 3.060 2.380 513 228 124 55 .62 .04 .04 MN JC-FT SANTA ANA RIVER BASIN

SAN JACINTO RIVER NEAR SAN JACINTO, CALIF.--CONTINUED

JUL

.59 l.B .36 3.1 .01 3.9 .65 1.2 1.8 .51 3.6 2.0 .73 1.2 2.0 .58 3.1 1.5 .73 1.2 2.0 .29 2.8 .73 1.2 2.0 .25 2.5

73 1.3 2. 2.0 .25 26 4. t.5 .13 .01 0 .81 73 1.5 2. 2.1 .25 26 3. 1.4 .13 0 0 .15 65 1.6 2. 2.C .17 26 3. .90 .13 0 0 .06 65 1.9 2. 2.0 .06 21 2. .55 .13 0 0 .04 66 6.8 2. 2.6 .29 17 2. .35 .15 0 0 .01

74 5.0 2. 5.5 2.7 17 2. .34 .17 0 0 .01 73 4.4 2. 5.9 2.3 17 2. .30 .17 0 0 0 65 3.7 2. 2.C 16 2. .28 .17 0 0 0 74 3.4 2. 21 2. .29 .16 c, 0 0 90 3.3 2. 4.1 2.0 24 2. .27 .13 .50 1.1 0

99 3.1 2. 16 2.1 22 2. .22 .13 .74 0 0 I 3.0 2. 8.7 2.0 21 2. .15 .12 .91 .22 0 2 2.9 2. 5.0 1.7 18 2. .16 .08 .76 1.0 0 4 2.8 2. 3.7 .43 17 2. .17 .04 .74 1.6 0

4 2.7 2. .79 .08 16 2. .20 .02 .63 1.3 0 .23 1.2 0

.21 .01 .66 3.2 0

4 2.2 2. .28 .13 17 2. .21 .01 .32 6.9 0 2 1.8 2. .25 .13 17 3. .21 .01 .08 5.8 0 2 1.6 2. .24 5.5 15 4. .21 .01 .03 .68 0

31

TOTAL 69 75.6 65. 90.10 28.69 683 112. 24.49 2.70 7.85 33.30 1.09 MEAN 99 2.52 2.1 2.91 1.02 22.0 3.7 .79 .090 .25 1.07 .036 MAX .4 6.8 2. 16 5.5 71 I 3.6 .17 .91 6.9 .81 MIN 59 1.2 1. .17 .06 13 2. .15 .01 0 0 a AC-FT 61 150 13C 2.2

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SAN JACINTO RIVER, LAKE HEMET WATER CO.'S UPPER AND LOWER CANALS, AND FAIRVIEW LAND AND WATER CO.'S PIPELINE, NEAR SAN JACINTO, CALIF., WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

1 3. 2.4 34 75 25 31 23 12 .7 .6 2 3. 2.4 28 65 26 31 23 12 .3 .5 . 3 3. 2.2 26 57 25 28 23 12 .0 .3 <> 3. 2.1 25 52 >4 28 21 12 .6 .2 5 3. 2.0 23 47 24 28 20 12 .2 .1 6 2. 2.3 21 43 67 28 19 12 .1 .0 7 2. 2.3 20 42 99 29 19 12 .1 .9 8 2. 2.4 19 40 57 29 18 12 .5 .8 9 2. 2.4 38 37 43 29 17 13 .3 .1 10 3. 2.4 74 34 37 29 18 14 5 .9

11 2. 2.5 46 32 34 29 19 14 .6 .6 . 12 2. 2.5 41 31 34 30 21 13 .2 .8 13 2. 2.5 43 2B 32 31 22 12 .8 .9 14 2. 3.4 38 2B 31 31 21 11 .4 .8 15 2. 4.5 35 27 31 30 20 11 .4 .8 16 2. 6.3 32 26 30 31 IB 11 .4 .6 . IT 2. 27 30 24 30 30 19 10 .2 .5 .[ 18 2. 14 27 26 30 29 20 9. .0 .3 . 19 2. 7.9 25 25 30 29 21 9. t 9 .4 . 20 2. 5.6 26 25 30 29 19 9. .8 .5

21 2. 4.3 26 24 30 28 18 9. ,5 .5 22 2. 1,280 37 24 30 27 18 9. .3 .9 .( 23 2. 2,640 31 24 30 27 16 9. .9 .5 . 24 2. 342 27 23 30 29 15 8. .8 .2 25 2. 345 27 22 30 36 15 8. .6 .8 26 2. 152 25 22 31 31 14 7. .5 .7 27 2. 88 25 22 28 27 14 7. .6 .7 28 2. 64 24 20 29 27 14 6. .8 .4 29 2. 48 121 20 26 13 6. .4 .9 . 30 2. 40 233 2* 25 13 6. .7 .3 . 31 2. 101 26 23 6. .8 _

MEAN 2.6 170 42.8 32.7 34.9 28.9 18.4 10. 4 04 4 01 3 3 4 MAX 3. 2,640 233 75 99 36 23 1 .6 MIN 2. 2.0 19 20 24 23 13 6. .5 .3 , AC-FT 16 10,120 2,630 2,010 1,940 1,780 1,090 63 40 47 2 7 20

0 SANTA ANA RIVFR BASIN

11069500 SAN JACINTO RIVER NEAR SAN JACINTO, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SAN JACINTO RIVER, LAKE HEMET WATER CO.'S UPPER AND LOWER CANALS, AND FAIRVIEW LAND AND WATER CO.'S PIPELINE, NEAR SAN JACINTO, CALIF., WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

DAY DCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

I 3.5 2.7 1.1 26 46 19 45 94 47 21 15 20 2 3.7 2.7 1.1 26 36 20 48 91 43 20 15 102 3 3.1 2.8 258 44 4 4.1 2.B 160 24 30 22 48 95 40 20 15 27 5 4.8 2.8 1,970 24 2B 22 69 90 38 20 14 25

6 4.5 3.0 3,300 25 28 24 51 B5 39 20 13 34 7 4.4 ,.1 1,420 31 27 22 52 83 36 19 13 29 8 4.1 tb.9 520 2B 26 22 46 B6 32 18 12 20 9 3.9 ).7 209 20 26 21 42 91 32 17 11 18 10 4.6 ?.2 140 18 26 21 43 130 32 17 10 IB 11 4.B l.B 1C5 18 24 22 55 100 30 30 10 IB 12 2.2 .5 83 16 ?3 23 57 3B 30 14 9.C IB 13 1.5 .3 66 15 23 B3 60 79 34 64 8.3 19 14 2.4 .1 62 14 23 B.8 19 15 2.6 .1 56 14 22 105 72 67 32 35 9.5 20 19 16 2.6 .0 52 13 20 31 25 B.3 '19 17 2.5 .0 50 12 20 B6 69 60 31 21 B.8 18 2.6 .0 48 14 19 79 74 57 30 20 9.3 20 19 2.5 .0 43 15 IB 66 87 56 29 19 15 20 20 2.5 .0 41 14 21 58 87 54 29 18 15 20 21 2.6 .0 34 14. 23 57 94 52 2B 18 17 19 22 2.7 .1 36 21 21 49 137 50 27 19 37 20 23 2.5 .2 34 55 IB 46 112 52 26 19 64 20 24 2.5 .1 32 44 IB 45 IOB 49 25 19 47 20 25 2.5 .1 32 149 20 45 100 4B 24 19 26 19

26 2.5 1.1 35 78 20 44 103 45 23 19 24 17 27 2.9 .0 32 65 20 42 113 45 22 . 18 23 16 2B 2.9 1.0 30 56 19 40 109 46 19 17 22 12 29 2.9 u" f.-r'" 2B 33 2.6 .0 27 50 41 97 51 22 15 19 23 31 2.8 - 27 58 44 49 15 24

MEAN 3.11 1 87 286 33.2 24.3 49.7 75.5 70.0 30. 7 21.7 1B.O 24.1 MAX 4.B 9.9 3,300 149 46 224 137 130 "47 64 64 102 MIN 1.5 1.0 1.1 12 18 19 42 45 19 14 B.3 12

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SAN JACINTO RIVER, LAKE HEMET WATER CO.'S UPPER AND LOWER CANALS, AND FAIRVIEW LAND AND WATER CO. 1 S PIPELINE, NEAR SAN JACINTO, CALIF., WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 10 11 5.B 16 12 .1 15 7.8 6.3 6.2 4.9 2.4' 10 2 11 11 16 12 .1 63 14 7, 6.0 5.7 4.B 3 11 11 2.3 19 14 .7 49 14 6. 5.B 5.4 5.1 4 10 11 3.4 19 14 .1 40 14 7. 5.9 5.9 5.4 5 11 12 3.4 IB 14 .9 35 14 7 , 6.1 6.0 5.2 6 14 12 3.3 12 13 13 7. 7.0 6.0 4.9 7 13 12 3.3 14 13 11 33 13 B. B.6 6.6 4.B B 12 12 3.5 14 12 59 32 12 9 B 10 6.4 4.6 9 12 12 3.1 13 14 40 30 12 6. 9.2 6.0 .4 10 12 12 3.1 12 16 29 27 12 7 . 7.4 5.6 .4

11 12 10 3.0 11. 16 20 24 12 6. 6.7 5.4 .3 12 12 10 B.I 11 15 IB 22 16 6. 6.3 5.4 .B 13 12 10 9.0 11 17 16 21 2B 5. 6.2 5.6 .8 14 12 9 .1 10 11 17 19 20 IB 5. 6.4 5.9 .2 15 12 9.1 11 11 16 16 19 14 4- 6.4 5.6 .5

16 12 9.0 10 13 14 14 20 13 3> 6.1 5.6 4.4 17 12 8 .9 10 12 15 14 26 12 3. 5.B 5.5 4.1 IB 11 8 .9 15 10 17 14 19 '11 3. 5.8 5.B 4.4 19 .11 14 20 9.6 17 16 17 11 2 . 5.6 5.7 4.6 20 11 17 10 9.5 16 13 16 11 5. 5.5 5.9 4.9

21 11 2 8.7 B.B 16 13 16 11 6 . 5.4 5.9 4.B 22 12 1 9.4 9.3 14 14 16 10 6. 5.5 5.9 4.2 23 12 .0 12 7.7 13 13 15 12 6. 7.2 5.6 3.B 24 12 .5 14 8.5 13 13 15 11 7. 8.2 5.4 3.7 25 12 .4. IB 7.6 12 13 14 10 7^ 7.2 5.6 3.B 26 12 3.4 22 4.8 12 14 14 9.9 7> 6.5 5.5 3.5 27 11 3 .4 24 9.7 12 11 14 9.2 7, 6.4 5.4 3.3 28 12 3 .4 23 12 12 10 13 B.a 7. 17 5.3 3.4 29 11 3 .4 22 11 11 9.9 12 8.9 1 f B.I 5.2 3.7 30 10 3 .4 19 12 10 16 8.8 7. 7.2 5.0 3.9 31 11 - 18 12 10 8.6 7.0 5.2 TOTAL 359 281 MEAN 11.6 9. 40 10.6 11.8 14.1 15.2 23.4 12.5 6.5 7.06 5.6B 4.32 MAX 14 20 24 19 17 59 63 28 9. 17 6.6 5.4 MIN 10 3 .4 2.3 4.8 11 5.9 10 B.6 2 , 5.4 5.0 3.3 3B i?i 349 257

HTR YR 1968 TOTAL 4,026.2 MEAN 11.0 MAX 63 MIN 2.3 AC^FT 7,990 SANTA ANA RIVER BASIN

11069500 SAN JACINTO RIVER NEAR SAN JACINTO, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SAN JACINTO RIVER, LAKE HEMET WATER CO.'S UPPER AND LOWER CANALS, AND FAIRV1EW LAND AND WATER CO.'S PIPELINE, NEAR SAN JACINTO, CALIF., WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

JUN JUL AUG SEP 151 76 26 18 20 2 4.0 3.5 1.1 .92 91 391 18C 149 74 24 17 21 81 320 211 149 68 22 17 ?0 4 3.B >.6 1.3 2.0 76 265 206 153 67 21 18 21 5 3.7 1.6 1.2 3.2 20 19 21

6 3.3 .5 1.1 2.5 212 174 256 166 80 20 22 21 7 3.5 .4 1.1 2.8 152 163 210 160 77 20 21 IS B 3.7 .8 1.0 2.8 109 155 208 154 76 19 22 IB 9 3.6 .9 1.0 2.6 94 153 203 138 71 17 22 19 10 3.6 .8 1.0 2.3 92 175 184 19 11 3.9 .3 1.1 2.8 92 219 22 19 12 3.9 .6 1.2 2.0 89 207 192 137 75 21 22 19 13 3.8 .8 l.l 1.5 87 201 19 14 4.2 .8 1.2 128 81 189 198 118 66 19 22 20 15 3.7 .0 1.3 72 81 181 187 120 62 IB 2? 22 16 3.2 .8 1.6 23 82 178 180 124 46 IB 21 23 17 3.1 .1 2.0 13 76 181 176 119 39 IB 22 22 18 3.5 .5 1.6 9.2 83 189 170 21 19 3.7 .1 1.5 34 86 204 161 116 38 20 24 21 2T 3.1 .98 2.3 97 S4 207 161 116 38 24 24 20 21 3.0 .87 1.6 413 92 222 162 117 38 24 24 17 22 3.0 .80 1.7 199 94 210 165 117 36 23 24 17 23 3,0 .77 1.3 88 90 198 16 24 3.0 .74 .73 830 601 198 159 114 34 21 21 16 25 3.2 3S 20 IB 16

26 3.1 .80 3.6 It 150 1,880 197 154 106 39 20 18 16 27 3.1 .81 3.2 568 938 205 153 99 37 14 18 16 28 3.3 .87 1.4 275 16 29 3.4 .87 .99 170 223 154 89 28 21 IB 15 30 4.0 .83 .94 131 234 152 82 27 23 IB 15 20 IB

MEAN 3.51 2.41 1.38 239 310 220 182 125 54.0 20.6 20.7 1B.B 516 256 166 80 26 24 23 17 15 AC-FT 216

T 6,500

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SAN JACINTO RIVER, LAKE HEMET WATER CO.'S UPPER AND LOWER CANALS, AND FAIRVIEW LAND AND WATER CO.'S PIPELINE, NEAR SAN JACINTO, CALIF., WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

1 14 S.I 8.1 6.1 2.6 49 11 9.7 2.4 10 4.3 8.3 10 12 B.3 3 16 7.2 10 5.6 2.6 46 9.2 S.B 3.7 10 11 8.2 4 17 11 10 B.3 5 17 1 3 11 5.5 2.2 30 9.4 8.7 9.3 11 10 8.3 6 16 1 4 11 5.7 2.4 29 10 8.5 9.5 11 10 B.B 7 15 1 6 11 6.1 2.6 29 10 B.B 9.9 11 9.3 B.2 8 16 9.7 11 5.7 2.4 29 10 8.6 K 11 S.5 8.3 9 16 9.3 12 5.6 2.3 24 9.3 B.2 11 11 S.4 7.2 10 17 1 3 9.4 7.6 3.4 20 9.4 7.8 1C 11 B.I 6.0

11 17 1 4 8.4 11 6.7 20 9.4 7.5 9.4 11 7.3 6.2 12 17 1 2 7.2 12 6.2 20 9.0 7.1 9.S 11 7.1 6.2 13 17 1 1 6.9 12 5.6 17 B.S 7.0 9.9 11 6.9 6.3 14 17 1 1 6.7 10 5.5 21 8.9 7.0 9.7 11 7.2 6.5 15 17 24 8.7 6.2 9.3 10 8.3 5.9 16 16 9.3 6.5 10 4.9 24 8. 8 5.S 9.0 11 7.6 5.7 IT 13 8.3 6.5 23 4.9 22 9.1 5.3 8.6 11 7.2 5.6 IB 13 7.1 6.5 14 4.8 21 7.9 5.4 8.9 12 7.5 5.6 19 10 5.8 6.5 8.5 4.3 IS 7.S 5.5 8.5 12 B.B 5.6 17 7.2 5.4 8.1 13 11 5.0 16 7.4 5.4 7.7 12 11 5.3 22 13 12 11 5.4 12 11 6.3 12 11 6.2 25 11 4.6 6.3 3.1 2.3 16 7.0 4.7 B.S 12 12 6.1 26 11 5.1 6.3 2.9 2.3 17 6.8 4.7 8.3 12 16 6.0 27 13 4.9 6.2 2.6 2.3 17 9.1 4.7 B.S 11 16 6.8 28 12 6.6 6.3 2.6 9.1 15 11 4.S 8.6 11 10 9.6 29 12 7.6 6.1 2.6 15 9.4 4.6 B.5 11 9.2 10 30 12 7.6 6.0 2.4 13 11 3.9 8.9 11 S.S 10 13

210.2 MEAN 14.4 S 58 7. BO 6.S4 3.65 24.0 8.93 6.45 8.30 11.1 9.52 7.01 MAX 17 16 12 23 9.1 86 11 9.7 11 13 16 10 AC-FT -885 511 480 420 203 1,480 531 396 494 684 586 41T MAX 3,070 MIN . 89 AC-FT 72,710 MAX 86 M1N 2. 1 AC-FT 7,080 SANTA ANA RIVER BASIN

11070000 BAUTISTA CREEK NEAR HEMET , CALIF. LOCATION. --Lat 33 0 41'40", long 116°S1 1 00" ) in sec. 35, T.5 S. , R.I E. , Riverside County, on left bank 0.2 mile upstream from unnamed tributary, 6 miles upstream from mouth, and 8 miles southeast of Hemet. DRAINAGE AREA. --39.4 sq mi. PERIOD OF RECORD. --October 1947 to September 1969 (discontinued) . GAGE. --Water-stage recorder. Altitude of gage is 2,250 ft (from topographic map). AVERAGE DISCHARGE. --22 years, 0.57 cfs (413 acre-ft per year); median of yearly mean discharges, 0.02 cfs (14 acre-ft per year) . EXTREMES. --Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (20 cfs), water years 1966-69 Date Time Disch. G.H. Date Time Disch. G.H. Date Time Dis ch. G.H. Nov. 23, 1965 0200 *498 4.80 Aug. 23, 1967 1430 60 3.78 Jan. 25, 1969 1400 473 4.98 Dec. 29, 1965 2200 80 3.16 Sept. 2, 1967 1700 360 4.95 Feb. 6, 1969 1800 181 4.16 Dec. 6, 1966 2330 *477 4.70 ^P 1 ' 29 ' 1967 1600 95 3.92 Feb. 25, 1969 2300 * 650 5.38 Jan. 23, 1967 0200 23 2.63 Apr. 22, 1967 0800 24 2.65 Dec. 18, 1967 1600 *13 2.82 No flow for most of time in each year. Period of record: Maximum discharge, 1,440 cfs Apr. 3, 1958 (gage height, 4.65 ft); no flow for most of time in each year.

15 acres. DISCHARGE, IN CUBIC FEET PER SECOND MATER YEARS OCTOBER 1965 TO SEPTEMBER 1969 4.4 22...... 65 25...... 9. NOV. 21...... 10 23...... 23...... 94 26...... 0 DEC. 18...... 3.7 24...... 0 19...... 2.7 25...... 24 25 40 APR 11 2

16...... 10 14...... 1. 22...... 10 MAR. 1...... 22...... 10 15...... 0 24...... 1.4 2......

30...... 5.8 17...... 0 26...... 7.0 4......

MONTH CFS-BAYS MAXIMUM MINIMUM MEAN RUNOFF IN ACRE-FEET

.... 797.55 249 0 2.19 1,580

NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. SANTA ANA RIVER BASIN

110700SO BAUTISTA CREEK AT VALLE VISTA, CALIF. LOCATION.--Lat 33°44'04", long 116°53'33", in SEWtSEit sec.17, T.5 S. , R.I E. , Riverside County, of flood channel, 1.0 mile south of Valle Vista. DRAINAGE AREA.--47. 2 sq mi. PERIOD OF RECORD.--October 1969 to September 1970. GAGE.--Water-stage recorder. Altitude of gage is 1,835.ft (from topographic map). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (25 cfs), water year 1970 Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Feb. 10, 1970 2345 28 1.23 Mar. 1, 1970 0730 286 1.91 Mar. 6, 1970 1030 *302 1.94 No flow for long periods during year. Period .of record: Max imum discharge, 302 cfs Mar. 6, 1970 (gage height, 1.94 ft), from rating curve based on computation of flow in concrete-lined channel at gage heights l.SO, 2.00, and 3.00 ft; no flow for 1()ng periods. REMARKS. --Re cords poor. No regulation above station. Diversion above station foV irrigation of abo ut IS iicres . Some infiltration by detention dam, 1.5 miles upstream.

DISCHARGE, IN CUBIC FEET PER SECOND , WATER YEAR OCTOBER- 1969 TO SEPTEMBER 1970 DAY OCT NOV AUG SEP

1 1 .35 0 14 0000 0 G 2 0 2.6 .86 11 0000 .02 0 3 0 1.2 7.7 .30 COCO 0 0 4 C 2.8 5.7 .57 0000 0 0 5 0 3.5 2.2 .10 0 3.3 0 .02 0 0

6 0 .92 .83 54 000 .02 0 0 7 0 .90 0 C 0000 0 0 8 0 G 0 0 C 0 0 0 0 0 9 0 0 .04 0 C 0 0 0 0 0 If. 0 .36 1.7 .01 0000 .02 0

11 0 4.8 1.3 0 coco 0 0 12 C 3.8 1.4 0 0000 0 0 13 0 3.9 1.2 C 0000 0 0 14 C 1.7 1.7 0 0000 0 0 15 0 .02 0 C 0 0 .53 0 .36 0

16 0 1.8 0 .47 0000 .02 0 17 0 .59 0 1.2 0 0 .09 0 0 C 13 0 2.8 0 0 0000 0 0 19 0 2.3 0 C G 3 .66 0 0 0 20 1.2 2.2 0 0 0000 0 0

21 .68 1.3 0 C C .01 0 0 0 0 22 .57 1.2 0 .03 0 .02 0 0 0 0 23 .97 .49 0 .06 0 9.0 0 0 0 0 24 4.5 .86 0 .27 0 .18 0 0 0 0 25 9.4 .65 0 .53 0 0 0 0 0 0

26 2.6 .08 0 .01 0000 .95 0 27 .13 0 0 .12. .10 000 0 0 28 .85 0 4.3 .01 .10 0 .27 0 0 0 29 .39 0 .05 .15 0 0 0 0 .03 30 . 97 0 .03 .02 0 0 0 0 .08 .03 0 .17 0 0 0 TOTAL 0 02 .11 MEAN 0 0 .72 1.33 1.03 2.68 .012 .40 .052 .001 .044 .004 MAX 0 0 9.4 4.8 7.7 54 .15 9.0 .66 .02 .95 .08 MIN 0 0 000 0 0000 0 0 AC-FT 0 0 44 82 57 164 .7 25 3.1 .OB 2.7 .2 SANTA ANA RIVER BASIN 227

11070270 PERRIS VALLEY STORM DRAIN AT NUEVO ROAD, NEAR PERRIS, CALIF. LOCATION.--Lat 33°48'04", long 117°12'1^", in SE^SWjSW; sec.21, T.4 S. , R. 3 W. , Riverside County, 1.9 miles northeast of Perris and 2.0 miles upstream from San Jacinto River. DRAINAGE AREA.--93.3 sq mi. PERIOD OF RECORD.--October 1969 to September 1970. GAGE.--Water-stage recorder. Altitude of gage is 1,413 ft (from topographic map). EXTREMES.--Maximum discharge during water year, 299 cfs Mar. 5 (gage height, 1.61 ft); no flow for most of time. Period of record: Maximum discharge, 299 cfs Mar. 5, 1970 (gage height, 1.61 ft); no flow for most of time. Flood of Feb. 2S, 1969, 5,600 cfs (gage height, 6.7 ft, from floodmarks), result of slope-area measurement by Riverside County Flood Control District. REMARKS.--Records good except those below 10 cfs, which are poor. Some regulation by percolation basins above in files of the Menlo Park district office.

DISCHARGE. IN CUBIC FEET PER SECOND. MATER YEAR OCTOBER 1969 TO SEPTEMBER 1971

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 0 0 0 57 2 0 0 0 58

1 C 0 29 0 2 0 0 00 3 0 0 00 4 0 0 00 5 0 0 00

6 0 5.7 0 0 7 C 0 00 a 0 0 00 9 C 0 00 0 C 0 CO

1 C 0 00 2 C 0 00 3 0 0 00 4 0 0 CO 5 C 0 00

6 C 0 00 7 C 0 00 8 0 0 17 0 9 0 0 0 0 C 0 0 1 ------0 0

TAL 0 12 0 5.7 63 184 0 AN 0 .40 0 .18 2.25 5.94 C X 0 12 0 5.7 29 69 C N 0 0 0 0 0-. 0 0 -FT 0 24 C tl 125 365 0

525 228 SANTA ANA RIVER BASIN

11070500 SAN JACINTO RIVER NEAR ELSINORE, CALIF. LOCATION.--Lat 33°39'51", long 117°17'35", in SESqSEJqNEJq sec.9, T.6 S. , R. 4 W. , Riverside County, on right bank 2 miles east of Elsinore and 2.1 miles downstream from Railroad Canyon Dam. DRAINAGE AREA.--728 sq mi. PERIOD OF RECORD.--January 1916 to September 1970. Monthly figures 1927-50, adjusted for diversion, published in WSP 1315-B. GAGE.--Water-stage recorder. Altitude of gage is 1,270 ft (from topographic map). Prior to Feb. 13, 1916, non- recording gage at site 0.8 mile downstream at different datum. Feb. 13, 1916, to Oct. 27, 1921, nonrecording gage at present site at different datum. EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water years 1966-70 are contained in the following table:

Wtr yr Date Discharge G.H. Date 1966 Mar. 10, 1966 322 4.69 Most of time 1967 Mar. 7, 1967 11 2.82 1968 Nov. 19, 1967 34 3.28 1969 Feb. 25, 1969 6,260 9.48 1970 Mar. 1, 1970 15 2.62 do. Period of record: Maximum discharge, 16,000 cfs Feb. 17, 1927 (gage height, 11.8 ft), from rating curve extended above 2,000 cfs on basis of slope-area measurement of maximum flow; no flow for several months in most years. REMARKS.--Records good. Discharge of Feb. 10 to Mar. 28, 1966, was mostly imported Colorado River water for replenishment of Lake Elsinore. Flow partly regulated by Lake Hemet (see station 11069000) and regulated since 1928 by Railroad Canyon Reservoir (capacity, 12,000 acre-ft) 2.1 miles above station. Diversion for irrigation and domestic use above Railroad Canyon Reservoir. During water years 1966-70, Temescal Water Co. diverted 2,000, 1,683, 1,087, 264, and 800 acre-ft, respectively, from Railroad Canyon Reservoir for irriga­ tion below station in vicinity of Corona. See schematic diagram of Santa Ana River basin elsewhere in this report. REVISIONS.--WSP 1928: Drainage area.

0 .10 .10 201 0 0 .10 .10 201 D 0 .10 .10 197 0 0 .10 .10 197 0 0 .10 .10 197 0

0 .10 .10 195 0 0 .10 .20 193 .60 0 .10 .10 191 0 0 .10 .10 218 0 .20 0 18 310 0

.20 0 320 0 .10 o 318 0 .10 o 310 0 .10 .10 105 0 .10 .10 1.7 0

.20 .10 53 0 .20 .10 4.6 0 .10 o 5.9 0 .10 .10 3.8 0 .10 .10 .50 0

.10 o .60 3 .10 o .70 0 .10 .10 .40 0 0 .10 .30 0 0 .10 .40 0

.10 .10 2 ! .20 0 0 .10 2 ) .20 0 0 .10 2 ) .10 0 .20 .10 -. ..._ 0 0 .50 .20 0 0 31 . 20 .20 0 o

TOTAL 0 2.80 0 0 .60 MEAN 0 .090 .084 129 10* 0 0 0 .019 MAX 0 .50 .20 201 320 0 0 0 .60 WIN 0 0 o. .10 0 0 000 AC-FT 0 5.6 5.2 r.iso 6,400 0 0 0 1.2 SANTA ANA RIVER BASIN

11070500 SAN JACINTO RIVER NEAR ELSINORE, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

OCT NOV DEC JAN FEB MAR APR MAY JUN JUL

.30 5.2 .10 .30 3.2 .1C .30 9.2 .10 9.9 9.6 6 0 0 .30 9.2 0 1.3 r 0 0 .30 9. 0 0 8 0 0 .30 6. 0 0 9 a o .30 6. 0 0 10 0 0 .30 8. 0 0

11 0 0 .30 9. .10 0 12 0 0 .30 6. .10 0 13 .10 0 .30 8. 0 0 14 .10 0 .30 B. 0 0 15 .1C 0 .30 8. 0 0 16 0 0 .30 8. 0 0 17 0 0 .30 8. C 0 18 C 0 .30 8. 0 0 19 0 0 .30 8. .10 0 20 0 0 .30 8. .10 0 21 0 0 .30 8. .1: o 22 0 .10 . 2C 8. 0 0 23 .10 .70 '. 10 8. 0 0 24 .20 .50 .10 8. 0 0 25 0 .70 .10 6. 0 0 26 0 .50 .20 .10 0 0 27 0 .40 6.1 .10 0 0 28 0 .40 9.9 .10 0 0 29 0 .30 .10 0 0 30 0 .20 .10 0 0 31 0 .20 .10 0 TOTAL 0 MEAN 0 0 .019 .13 .62 6.85 .030 .26 0 MAX 0 0 .20 .70 9.9 9.9 .10 4.1 0 HIN 0 000 .10 .10 C 0 0 AC-FT 0 0 1.2 7.9 46 421 1.8 16 0

HTR YR 1967 TOTAL 24i).90 MEAN .68

DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

NOV DEC JAN FEB MAR APR MAY JUN JUL

2.1 2.1 2.1 2.0

13 .10 .10 .10 0 14 0 .10 .10 0 15 0 .10 .40 0 16 0 .10 .40 0 17 0 .10 .20 0 ie 0 .10 1.0 0 19 6.1 .20 1.8 0 20 7.1 1.3 .50 0 21 1.8 1.6 .10 0 22 .50 1.6 .10 0 23 .10 1.6 .10 0 24 0 1.6 .20 0 25 0 1.6 5.4 0 26 0 1.8 .40 0 27 0 l.B .20 0 28 0 1.8 .10 0 29 0 1.8 0 0 30 0 2.0 D 0 31 2.0 0 0 TOTAL 15.70 21.30 32.90 0 .30 0 MEAN .52 .69 1.06 0 .010 0 MAX 7.1 2.0 5.4 0 .10 0 MIN 0 0 0 0 0 0 AC-FT 31 42 65 0 .6 0

WTR YR 1968 TOTAL 70.20 MEAN .19 MAX 7.1 MIN 0 AC-FT 139 SANTA ANA RIVER BASIN

11070500 SAN JACINTO RIVER NEAR ELSINORE, CALIF.--CONTINUED PER SECOND OBER 1968 TO DAY JUN JUL AUG

1 0 8.9 1,730 IC3 .13 ? 1.4 8.6 896 81 .10 3 1.5 8.3 550 74 .09 4 1.6 8.3 510 96 -.10 5 1.6 10 386 108 .10 6 1.6 95 310 81 .13 7 1.6 288 187 71 .13 8 1.7 278 2C5 72 .13 9 1.7 273 190 72 .10 10 1.8 203 175 72 .10 11 1.8 79 170 72 .09 12 2.0 13 168 49 .08 13 2.0 12 168 41 .08 14 1.8 12 170 4C .08 15 1.7 12 170 40 .08 16 1.6 12 170 40 .08 17 1.6 11 173 40 .08 18 1.7 13 170 39 .04 19 1.8 13 187 38 0 20 1.8 12 202 31 0

21 3.1 ID 202 1.3 0 22 1.7 12 193 .41 0 23 1.6 290 165 .60 0 24 2.1 2,190 133 .29 0 25 29 4,900 76 .20 0 26 238 4,230 109 .17 0 27 466 2,720 93 .15 0 28 424 2,560 73 .15 0 29 110 .15 0 3J 50 110 .13 0 31 10 110 0

TOTAL 000 1,505.8 18,282.1 8,258 1,263.55 1.72 0 0 C MEAN 000 48.6 653 266 42.1 .056 0 0 c MAX 000 466 4,900 1,730 108 .13 0 0 0 MIN 0000 8.3 73 .13 0 0 0 0 AC-FT 3.4 0 0 0 66 MIN 0 AC-FT 58,140

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTC)BER 1969 TO SEPTEMBER 1970 DAY OCT NOV DEC JAN FES MAR APR MAY JUN JUL AUG 1 .02 .23 2 .02 4.5 9.5 0 3 .02 .22 2.6 8.3 0 4 .02 .22 2.7 7.5 0 5 .02 .22 3.9 7.4 0 6 .04 .22 2.5 3.1 .18 7 .06 .22 2.5 .19 .18 8 .06 .25 2.5 .16 .14 9 .08 .25 2.6 .21 .11 10 .09 .56 2.6 .18 .09 11 .10 2.2 2.5 .10 .07 12 .16 .98 2.6 .04 .03 13 .21 .88 2.6 0 0 1* .22 .85 2.6 0 0 15 .21 .80 2.6 0 0 16 .22 .74 2.6 0 0 17 .29 .72 2.5 0 0 18 .32 .68 2.5 0 0 19 .30 .66 2.5 0 0 20 .29 .60 2.5 0 0 21 .29 .59 2.5 0 0 22 .32 .55 2.5 0 0 23 .30 .55 4.2 0 0 24 .29 1.7 7.6 0 0 25 .29 2.0 8.3 0 0

26 .29 2.1 8.9 D 0 27 .32 2.1 9.7 0 0 28 .32 3.0 9.7 c 0 29 .33 9.8 0 0 30 .25 9.7 0 0 31 .25 9.6 0 TOTAL COO 6.00 24.31 140.3 46.08 .80 0 0 0 MEAN 000 .19 .87 4.53 1.54 .026 0 0 0 MAX 3 0 0 .33 3.C 9.8 9.5 .18 0 0 0 MIN 000 .02 .22 2.5 0 0 0 0 0 AC-FT 0 0 0 12 48 278 91 1.6 0 0 C CAL YR 1969 TOTAL 29,311.17 MEAN 80.3 MAX 4,900 MIN 0 AC-FT 58,140 SANTA ANA RIVER BASIN

11071000 ELSINORE LAKE AT ELSINORE, CALIF. LOCATION.--Lat 33°40'10", long 117°22'20", Riverside County, in Elsinore State

EXTREMES.--Max maximum observed since cessation of overflow in J

dry, publi gh stages that have occurred in 1916-42 is contained in WSP 961. Flow partly regulated by Lake Hemet (s station 11069000) and regulated since 1928 by Railroad Canyon Reservoir

REVISIONS{WATER YEARS).--WSP 1635: 1943.

ELEVATION, IN FEET, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

ELEVATION ELEVATION DATE ELEVATION 1,227. 1,228.6 MAR. 29, 1,233.2 1,227. 1,228.6 APR. 28. 1,232.8 NOV. 1.227. 1,231.4 JUNE 1,232.3 JAN. 1.228. 1,233.3 28. 1,231.9 FEB. 1,228. 1,233.2 AUG. 1,231.0

11072000 TEMESCAL CREEK NEAR CORONA, CALIF. LOCATION.--Lat 33°50'29" > long 117°30'37", in El Sobrante de San Jacinto Grant, Riverside County, on left bank DRAINAGE AREA.--164 sq mi, no't including .768 sq mi above Lake Elsinore. PERIOD OF RECORD.--October 1927 to September 1970. Monthly discharge only for October 1928 to January 1929, published in WSP 1315-B. map). Prior to Feb. 11, 1943, at daturr 6.00 ft higher. 5RAGE DISCHARGE. --43 years, 3.61 cfs (2 (43 acre-ft per year). 1966-70 are contained in the following table: Maximum Minimum yr Date Di scharge G.H. Date" Discharge G.H. 6 Dec. 29 1965 1,500 3.80 Most of time 0 7 Dec. 6 1966 560 8.50 Long periods 0 8 Mar. 8 1968 576 8.54 do. 0 9 Feb. 25 1969 6,800 alS.O do. 0 0 Mar. 1 1970 a200 Sept. 29, 30, 1970 .02 From floodmarks. Period of record: Maximum discharge cfs Mar. 2, 1938, on basis of slope-area measurement of peak flow; no flow at times in most years. RE:

REVISIONS (WATER YEARS).--WSP 1635: 1939-40. 'WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATFR YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL

1 0 .50 .30 .10 .10 .10 1 0 .40 .20 .10 .10 .10 I 0 .30 .10 .50 .10 .10 ) 0 .30 0 .10 .10 .10 1 0 .20 0 .10 .10 .10

1 0 .20 1.0 .10 .10 .10 1 0 .10 .70 .10 .10 .10 1 0 .10 .50 .10 .10 0 ; c .10 .40 .10 .10 0 } 1.0 MO .30 .10 .10 0

I .80 0 .20 .10 .10 0 1 .70 0 .20 .10 .10 0 1 .60 0 .20 .10 .10 0 I .60 0 .20 .10 .10 0 .AC .50 0 .20 .10 .10 0

.60 .50 0 .10 .10 .10 0 .30 .40 0 .10 .10 .10 0 1 .10 0 .10 .10 .10 0 1 . 10 0 .10 .10 .10 0 1 .10 0 .10 .10 .10 0 I .10 0 .10 .10 .10 0 1 .10 0 .10 .10 .10 0 i - .to 0 .10 .10 .10 0 .50 .10 0 .10 .20 .10 0

1

TOTAL 212.90 160.80 .70 MEAN 7.10 5.83 .023' MAX 148 169 .10 MIN AC-FT SANTA ANA RIVER BASIN

11072000 TEMESCAL CREEK NEAR CORONA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

MAR APR MAY JUN JUL

1 3 0 1.1 .60

3 1.1 .60 4 0 0 1.1 3.5 2.6 2.8 3.0 .0 1.0 1.0 .60 5 il 71 1.0 3.5 2.6 2.8 3.0 .0 .90 .90 .60

fa 0 251 1.0 3.3 2.6 2.8 3.0 .1 .50 .70 .60 7 .10 40 1.0 3.3 2.4 2.8 3.0 .1 .70 .70 .50 8 0 3.3 1.1 3.3 2.4 2.8 3.0 .1 .70 1.0 .50 9 0 3.2 1.1 3.3 2.4 2.8 3.0 .0 .70 1.1 .50 10 0 3.5 1.1 3.3 2.4 2.8 3.0 .8 1.2 1.1 .50

11 1.2 .40 12 .30 13 C 3.3 1.1 3.2 2.4 2.7 2.8 .5 .2 1.1 .30 14 0 3.2 1.1 3.2 2.4 2.6 2.B .5 .1 1.0 .30 15 0 2.6 1.1 3.2 2.2 2.6 2.6 .5 .3 1.0 .30 16 0 2.4 1.1 3.0 2.2 2.6 2.4 .5 .80 .90 .30 17 0 2.4 1.1 3.0 2.4 2.6 2.4 .7 .0 .80 .30 18 0 2.1 l.l 3.0 2.4 2.7 2.4 .7 .0 .80 .30 19 0 1.5 1.1 3.C 2.8 3.2 2.4 .7 .1 .90 .30 20 0 1.4 1.0 3.0 3.0 3.0 2.4 .7 .2 1.0 .20

21 0 1.2 1.0 2.8 3.0 3.0 2.4 .6 .0 .0 .20 22 0 1.3 11 2.8 2.8 3.7 2.2 .6 .0 .0 .20 23 0 1.1 10 2.8 2.8 3.2 2.2 .6 .2 .4 .20 24 0 1.1 13 2.8 2.7 3.2 2.2 .0 .0 .2 .20 25 0 1.1 5.2 2.8 2.7 3.2 2.1 .3 .3 .0 .20

26 0 1.1 3.7 2.7 2.0 3.2 2.1 .3 .3 .90 .20 27 0 l.l 3.5 2.7 2.1 3.2 2.1 .3 .3 .90 .20 28 0 1.1 3.5 2.6 2.1 3.0 2.1 .2 .3 .BO .20

30 0 1.1 3.5 2.0 3.0 2.4 .0 .1 .70 .30

TOTAL 29. BO 10. BO

MAX 0 .10 251 13 1.4 .60 MIN 000 1.0 2.6 2.0 2.1 2.1 1.0 .50 .60 .20

DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TU SEPTEMBER 1968

OCT NOV OEC

.30 .50 1.2 2.6 .90 .6 .80 .10 .30 .50 1.3 2.6 .90 .9 .80 .10 .30 .50 1.4 2.6 .90 .8 .90 .10 .30 .50 1.6 2.6 .80 .6 .90 .10 .30 .50 1.6 2.6 .80 .6 1.0 .10

.30 .40 1.6 2.4 .80 .6 1.0 .10 .30 .40 1.6 2.4 .BO ,4 1.0 .10 .30 .40 1.6 2.6 14 .2 1.0 .10 .30 .40 1.6 2.6 . 1 ,2 .90 .10 .30 .40 1.6 2.4 ? * .90 .10

.30 .40 1.6 2.2 .! .2 .90 .10 .30 .40 1.6 2.2 .0 , 1 .90 .10 .30 .40 1.6 2.2 .0 .0 .90 0 .30 .40 1.6 2.2 .0 .7 .90 0 .30 .40 1.6 2.2 .0 .5 .90 0

.30 .40 1.6 2.2 .0 .4 .BO 0 .30 .40 1.6 2.1 .0 .3 .80 0 .30 .40 24 2.1 .0 .3 .70 0 .30 5.0 36 2.0 .0 .2 .60 0 .30 10 4.3 2.0 .8 .1 .50 0

.40 17 2.8 1.8 .8 .0 .50 0 .40 2.4 2.7 l.B .8 .0 .30 0 .40 1.3 2.7 1.8 .B .0 .30 0 .40 1.2 2.7 1.7 .8 .0 .30 0 .40 1.1 2.6 1.7 .8 .90 .20 0

.50 .90 2.6 1.7 .8 .90 .20 0 .50 1.0 2.6 1.7 .7 .90 .20 0 .50 1.1 2.6 1.7 .7 .90 .20 0 .50 1.2 2.6 1.6 0 .7 .80 .20 0 .50 1.4 2.6 .7 .BO .10 0 .50 2.6 1.6 .10

11.00 51.30 119.7 65.5 38.30 19 .90 55.10 19.70 1.20 0 0 0 0 0 .50 17 36 2.6 1.7 147 6.6 1.0 .10 0 0 0 .30 .40 1.2 1.6 .90 .BO .BO .10 0 0 0 0 22 102 237 130 76 397 109 39 2.4 0 0 0 SANTA ANA RIVER BASIN

11072000 TEMESCAL CREEK NEAR CORONA, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

0 0 .0 400 44 49 32 17 4.4 3.1 0 0 .2 280 90 49 32 17 4.3 3.1 0 0 .C 200 60 49 31 8 4.2 3.1 0 0 .9 140 46 48 31 8 4.1 3.1 0 0 .8 120 45 48 31 7 4.2 3.1

009 115 100 70 31 6 5.0 3.1 002 UO 60 43 32 4 6.1 3.1 0 0 .0 107 56 39 33 2 5.9 3.1 9 C .5 106 53 35 34 0 5.7 3.1 1 0 0 .1 105 52 33 35 9.5 5.5 3.1

I 0 0 .6 103 51 31 36 9.4 5.3 3.1 1 0 C .3 100 51 30 36 9.1 5.1 3.0 I 0 C .1 95 51 29 35 9.2 5.0 3.0 1 0 3.6 .9 90 51 28 32 10 4.8 3.0 0 0 .7 81 51 28 28 13 4.6 2.9

1(> C 0 .6 73 51 28 24 10 4.4 2.9 11 0 0 .5 66 50 1 ) 0 .70 .5 61 50 29 20 8.4 4.C 2.9 1 > 0 1.2 .2 58 50 29 19 7.9 3.8 3.0 2( 0 2.3 .7 55 50 30 IB 7.3 3.6 3.9

2 0 18 2.5 54 50 31 17 7.0 3.4 3.1 2 > 0 3.0 1 , 52 50 32 16 6.7 3.4 3.1 2 1 009 3 51 50 32 15 6.4 3.4 3.1 2 ; 0 257 40 } 49 50 33 14 6.3 3.4 3.4 2 ! 1.7 810 2,50 3 47 5C 34 14 6.2 3.4 3.8

2 I 1.2 150 1.50 2 r o so 90 3 45 49 36 15 5.4 .3 2.7 2 0 20 60 ) 45 49 35 15 5.1 .3 2.5 2 0 10 45 49 35 16 4.9 .3 2.3 3 3 0 4.0 44 33 4.5 .2

89.9 HE MOO .094 43.7 221 96.4 53.6 36.3 24.8 9.83 4.22 3.00 HA < 0 0 1.7 BIO 2,500 400 100 70 36 18 6.1 3.8 Mil4 0 C 0 01. B 44 44 2B 14 4.5 3.2 2.2 AC 178

CA . YR 1968 TOTAL 382.60 MEAN 1.05 MAX 147 MIN 0 AC-FT 759 800

1JOTE. NO GAGE-HEIGHT RECORD JAN. 26 TO SEPT. 30.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

DA1 OCT NOV DEC ' JAN FEB MAR APR MAY JUN JUL AUG SEP

1 1.7 l.l .67 .34 .16 i 1.0 .66 .33 .16 3 2.2 2.2 3.0 3.0 4.7 15 2.6 1.6 1.0 .64 .32 .15 < .62 .31 .15 5 1.6 1.0 .62 .30 .15

< .60 .30 .15 1 2.2 25 2.8 3.0 4.6 11 2.5 1.5 1.0 .59 .29 .14 8 2.2 12 2.8 3.0 4.6 9.0 2.4 1.5 .99 .58 .28 .14 q 2.2 10 2.7 3.0 4.6 8.0 2.4 1.5 .98 .56 .27 .14 1C. 2.2 9.4 2.7 12 18 6.8 2.3 1.4 .97 .55 .27 .13

u 2.2 8.6 2.7 9.8 11 6.2 2.3 1.4 .97 .54 .26 .13 u 13 .96 . 2 .25 .12 1< 2.2 6.8 2.7 8.0 7.4 5.0 2.1 1.3 .95 . 1 .24 .12 15 .95 . 0 .23 .12

U 1.3 .94 . 9 .23 .11 11 1.3 .93 . 8 .22 .11 1C .92 . 7 .22 .11 1? .90 . 6 .21 .11 2C .88 . 5 .21 .10

21 .86 .44 .20 .10 22 .B4 .43 .20 .10 22 .62 .42 .19 .OB 24 2.2 4.1 2.B S.4 5.5 3.3 1.9 1.2 .80 .40 .19 .08 2S 2.2 3.9 2.8 5.2 5.4 3.2 1.9 1.2 .78 .39 .19 .06

26 2.2 3.7 2.8 5.2 5.4 3.1 1.8 1.1 .76 .38 .18 .06 21 .74 .37 .18 .C4 21 2.2 3.$ 2.8 S.O 30 3.0 l.B 1.1 .72 .36 .17 .04 29 2.2 3.3 2.B 4.8 2.9 1.8 1.1 .70 .36 .17 .02 3C 2.2 3.2 2.9 4.8 2.8 1.7 1.1 .68 .35 .17 .02 31

T01 ME« H 2.20 5.76 2.79 5.64 7.23 9.66 2.16 1.34 .90 .49 .24 .11 MAX 2.2 25 3.1 12 30 70 2.7 1.7 1.1 .67 .34 .16 MIH 2.2 2.2 2.7 2.9 4.6 2.8 1.7 1.1 .68 .34 .16 .02 AC- B2 54 30 15 6.4

CAl YR 1969 TOTAL 14,844.70 MEAN 40.7 MAX 2,500 MIN 0 AC'FT 29,440

NOTE. NO GAGE-HEIGHT RECORD PRIOR TO JUNE 12. 234 SANTA ANA RIVER BASIN

11072200 TEMESCAL CREEK AT CORONA, CALIF. LOCATION.--Lat 330 53'46", long 117°34'50", in La Sierra Grant, Riverside County, on right bank 0.2 mile down­ stream from Lincoln Avenue and 1.0 mile northwest'of Corona. DRAINAGE AREA.--249 sq mi, not including 768 sq mi above Lake Elsinore. PERIOD OF RECORD.--December 1967 to September 1970. GAGE.--Water-stage recorder. Altitude of gage is 550 ft (from topographic map). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet) for December 1967 to September 1970 are contained in the following table: Maximum Minimum Wtr yr Date Discharge G.H. Date Discharge 1968 Mar. 8, 1968 774 4.27 Many days, 0 1969 Feb. 25, 1969 8,850 a8.17 Long periods 0 1970 Mar. 4, 1970 212 2.67 do. ° a From floodmark. Period of record: Maximum discharge, 8,850 cfs Feb. 25, 1969 (gage height, 8.17 ft, from floodmark), on basis of slope-area measurement of peak flow; no flow for most of time in each year. Flood of Mar. 2, 1938, 14,900 cfs, by slope-area measurement at site 3 miles upstream. REMARKS.--Records fair except those for water year 1969, which are poor. No gage-height record Feb. 24 to June 5, 1969. Flow regulated by Lake Elsinore and several storage reservoirs. Many diversions for irri­ gation. Prior to July 22, 1968, effluent from city of Corona disposal plant was released to creek at site 0.5 mile upstream. Water-quality records for the water years 1968-70 are published in reports of the Geo­ logical Survey.

DISCHARGE, IN CUBIC FEET PER SECOND, DECEMBER 1967 TO SEPTEMBER 1968

1 0 0 ^ 3.2 3.C 2.« 10 4.0 3.0 3.4 0 .10 3 0 0 4 3.2 3.2 2.8 2.8 4.0 3.0 3.4 0 .20 5 .20 .10

6 3.2 3.7 2.6 Z.B 4.0 2.8 3.4 0 a 7 .10 0 8 3.2 3.', 221 3.0 3.7 3.C 3.4 .10 o 9 0 0 1C 0 0

11 0 0 12 0 0 13 .1C 0 14 .10 0 15 0 0

16 0 0 17 .10 0 IB 36 2.8 3.4 2.8 3.2 3.2 3.4 3.Z .10 0 19 .ZO 0 ZO .10 0

Zl 2.8 2.8 3.2 2.8 3.7 2.8 3.2 3.2 0 0 zz 0 0 Z3 .10 .10 Z4 0 0 ZS 0 0

26 0 0 Z7 2.8 10 3.0 2.6 3.7 3.Z 3.4 0 0 0 28 0 0 29 0 0 30 0 0 31 3.2 3.7 Z.Z 3.0 0 0

TCTAL 101. Z 97.8 305.5 119. Z 108.3 95.6 73.10 1.20 .50 MEAN .039 .017 MAX 10 4.0 ZZ1 14 4.0 3.7 3.4 .2C .ZO KIN Z.6 3.0 Z.Z Z.8 Z.B Z.8 0 0 0 AC-FT 2.4 1.0 SANTA ANA RIVER BASIN

11072200 TEMESCAL CREEK AT CORONA, CALIF.--CONTINUED DISCHARC O»Y OCT NOV DEC JAN FEB M»« APR MAY JUN JUL 1 0 0 0 0 2.0 250 7.1 3.7 .10 2 0 0 0 0 1.5 165 25 3.6 .10 3 0 0 0 0 1.2 120 15 3.5 .05 4 0 0 0 0 1.0 90 11 3.4 .05 5 .05 . .02 0 0 6.3 72 10 3.3 .10 6 0 C 0 0 174 55 80 3.2 .20 7 .06 0 0 0 29 45 35 3.1 .20 e 0 0 0 C 4.0 40 20 2.0 .20 9 0 0 0 0 2.0 36 16 1.0 .10 10 0 0 0 C .75 32 14 .50 .13 11 0 0 0 0 0 28 12 .30 .12 12 .01 0 0 0 .46 26 10 .22 .14 13 .07 0 0 5.0 .20 23 9. .20 .11 14 .02 0 0 35 .96 20 8. .20 .09 1$ C 3.0 C C 3.1 15 1- .20 .42 16 0 .51 0 0 .56 11 6. .20 .20 17 0 0 0 0 .12 8. ) 6. .20 .18 ie 0 0 0 11 3.9 8. 5. .20 .29 19 0 0 0 20 3.8 8. 5. .20 .17 20 0 0 1.8 36 1.8 8. 5. .20 .19 21 0 0 0 100 .97 8. 5. .20 .19 22 0 C .15 .04 21 8. 4. .19 .24 23 o a .OS 1.2 OS 8. 4 B .19 .78 24 0 0 .02 207 00 8. 4. .19 .35 25 0 0 _6.8 1,010 3, 00 7. * .11 C 26 .03 0 12 95 li 00 7. 4. .05 0 27 .02 0 0 22 00 7. 4. 0 0 28 0 0 0 18 00 7. 4. 3 0 29 0 0 C 10 7. 3 B 0 C 30 0 0 C 5.0 7. 3. 0 0 31 0 0 3.0 7. .10 0 MEAN .DOS .12 .67 50.9 Z34 37. 11. ) .98 .16 0 MAX .07 3.0 12 1.010 3.000 25 ) 8 ) 3.7 .78 0 MIN 0 0 0 0 0 7. . 3. ) 0 0 0 ) 69

DISCHARGE. IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1969 TO SEPTEMBER 197J

NOV DEC JAN FEB MAR APR MAY JUN JUL

.02 .06 .05 0

.02 SANTA ANA RIVER BASIN

11073000 SAN ANTONIO CREEK NEAR CLAREMONT, CALIF. LOCATION.--Lat 34°12'58", long 117°40'04", in SE^SWuNE'i; sec.36, T.2 N., R.8 W. , Los Angeles County, on right bank 0.5 mile upstream from Southern California Edison Co.'s Sierra powerplant and 8.8 miles northeast of Clare- nont. DRAINAGE AREA.--16.5 sq mi. PERIOD OF RECORD.--January 1917 to September 1970; combined records of creek and conduit March 1901 to December 1916 (fragmentary, published as "near Upland"), January 1917 to September 1970. GAGE.--Water-stage recorder; broad-crested weir since January 1939 on creek; water-stage recorder and sharp- crested weir on conduit. River pickup discontinued and abandoned Jan. 5, 1969. Datum of gage is 3,396 ft (revised) above mean sea level. See WSP 1928 for history of changes prior to Jan. 10, 1939. Prior to July 28, 1969, at datum 1.0 ft higher. AVERAGE DISCHARGE.--Creek only, 53 years (1917-70), 10.3 cfs (7,460 acre-ft per year); median of yearly mean dis­ charges, 2.3 cfs (1,700 acre-ft per year). Average combined discharge of creek and conduit, 64 years (1901-2, 1903-4, 1905-9, 1910-15, 1916-70), 23.1 cfs (16,740 acre-ft per year); median of yearly mean dis­ charges, 16 cfs (11,600 acre-ft per year). EXTREMES.--Ma is (discharge in cubic feet per second, gage height in feet). :harge ( ) and peak discharges above base (50 cfs), water years 1966-70 Creek only Combined Wtr yr Date Time Discharge Gage he ght Date Discharge Gage-height 1966 Nov. 18, 1965 0245 94 .53 Nov. 18 1965 100 Nov. 22, 1965 1830 2,300 .08 Nov. 22 1965 2,300 Dec. 29, 1965 1730 2,590 .36 Dec. 29 1965 2,600 1967 Dec. 3, 1966 0630 80 .30 Dec. 3 1966 92 Dec. 6, 1966 1745 *2,060 .64 Dec. 6 1966 2,080 Dec. 11, 1966 0845 171 .41 Dec. 11 1966 171 Dec. 14, 1966 1545 225 .38 Dec. 14 1966 225 Jan. 24, 1967 1915 109 .22 Jan. 24 1967 129 May 14, 1967 1415 100 .39 May 14 1967 122 1968 Nov. 19, 1967 1700 105 .38 Nov. 19 1967 113 Mar. 8, 1968 0430 101 .95 Mar. 8 1968 128 1969 Jan. 21, 1969 0900 2,270 .43 Jan. 21 1969 2,270 Jan. 25, 1969 1115 16,400 1 .13 Jan. 25 1969 16,400 Feb. 6, 1969 1700 412 .47 Feb. 6 1969 412 Feb. 25, 1969 1000 4,560 .04 Feb. 25 1969 4,560 Apr. 3, 1969 0045 193 .52 Apr. 3 1969 193 1970 Mar. 1, 1970 0015 56 .67 Mar. 1 1970 *56 Annual minimum daily discharge, years 1966-70 Creek only Combined Wtr yr Date Date Discharge 1966 Oct. 5-8, 1965 Oct. 31, Nov. 10-12, 1965 6.0 1967 Oct. 10, 1966 .70 Nov. 28-30, 1966 9.6 1968 Aug. 12, 1968 .24 Aug. 5, 1968 1.4 1969 Dec. 24, 1968 .34 Nov. 21, 1968 .73 1970 Sept.29, 30, 1970 .56 Aug. 28, 1970 4.6 Period of record: Maxi charge (creek only), 21,400 cfs Mar. 2, 1938, on basis of slope-area measure­ ment and rainfall-runoff studies; no flow Aug. 24-27, 31, Sept. 1, Oct. 17-21, 1951. (Combine(Combined): Maximum discharge, 21,400 cfs Mar. 2, 1938; minimum daily, 0.30 cfs Dec. 8-19, 1954, Dec. 12-17, 1963. REMARKS.--Records for creek fair; combined, good. No gage-height record Apr. 8 to July 25, 1969. No regulat bined discharge of San Antonio Creek and Southern California Edison Co.' a conduit, which diverts from site 0.5 mile above station, see tables given herein. COOPERATION.--Records of discharge through Sierra conduit furnished by Southern Californi on Co. Los Angeles County Flood Control District furnished 49 discharge measurements. REVISIONS.--WSP 1928: Drainage area. SANTA ANA RIVER BASIN

11073000 SAN ANTONIO CREEK NEAR CLAREMONT, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND. MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT

1 .50 .30 132 1B8 40 19 28 21 17 3.7 .80 .60 2 .50 .30 100 231 37 34 29 20 17 3.0 .80 .60 3 .50 .30 99 222 34 36 28 20 18 2.5 .60 .60 4 .40 .30 85 192 31 36 28 21 17 1.5 .60 .60 5 .20 .30 73 145 29 35 28 21 18 1.0 .60 .60

6 .20 .30 70 134 37 34 28 21 15 .90 .70 .50 7 .20 .30 65 113 38 34 28 21 13 .80 .70 '.50.50 8 .20 .30 60 111 29 34 27 21 15 .70 .70 9 .30 .30 59 121 25 34 26 21 2.6 .70 .70 .50 10 .30 .30 58 118 27 33 27 21 2.4 .70 .70 .50

11 .30 .30 60 121 28 33 29 20 2.3 .70 .70 .50 12 .30 .30 58 119 26 32 28 20 2.3 .70 .70 .50 13 .30 .40 50 124 26 31 28 20 2.4 .70 .70 .50 14 .30 .50 40 127 24 31 28 20 2.3 .70 .70 .50 15 .30 .60 35 121 24 31 27 20 2.3 .70 .70 .50

16 .30 .90 34 112 23 31 26 19 2.3 .70 .70 .50 17 .30 31 31 105 22 31 26 19 2.5 .70 .70 .50 18 .30 45 29 91 22 31 27 19 2.3 .70 .70 .50 19 .30 22 27 81 21 31 26 19 2.3 .70 .70 .50 20 .30 12 25 75 21 30 25 19 2.3 .70 ,7C .50

21 .30 5.2 25 71 21 30 25 19 2.4 .60 .70 .60 22 .30 64S 26 63 20 30 24 18 2.3 .80 .70 .60 23 .30 469 24 58 19 31 23 19 2.3 .80 .70 .60 24 .30 425 22 54 19 32 22 19 2.5 .60 .7,. .60 25 .30 435 20 50 19 33 21 16 2.6 .80 .70 .60

26 .30 227 18 47 19 31 21 18 2.6 .80 .60 .60 27 .30 229 16 45 19 30 21 18 2.6 .60 .60 .60 28 .30 216 15 44 11 30 22 18 2.7 .80 .60 .60 29 .30 189 943 45 30 21 18 3.4 .80 .60 .80 30 .30 166 320 44 29 21 18 3.9 .80 .60 .80 31 .30 246 43 29 17 .80 .60 768 603 185.6 31.30 21.60 16.90 MEAN .31 104 92.4 104 25.6 31.5 25.6 19.5 6.19 1.01 .70 .56 MAX .50 648 943 231 40 36 29 21 18 3.7 .80 .80 HIN .20 .30 15 43 17 19 21 17 2.3 .70 .60 .50 AC-FT 19 6,200 5,680 6,380 1,420 1,940 1,520 1,200 368 62 43 34 CAl YR 1965 TOTAL 6,389. 70 MEAN MIN .20 AC-FT 12,670

DISCHARGE, IN CUBIC FEET PER SECOND , MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUl AUG SEP

1 .80 .80 1.0 41 15 3.4 27 44 60 12 1.9 1.7 2 .80 .90 1.2 37 14 3.0 28 45 57 11 1.7 1.7 3 13 2.8 29 42 52 11 1.7 1.7 4 .80 .90 10 35 9.7 2.5 31 42 47 12 1.6 1.7 5 .80 1.0 59 28 5.2 2.1 17 42 37 13 1.6 1.7

6 1.0 l.C 910 14 4.9 2.0 21 42 34 12 1.6 1.6 7 1.0 T.8 241 13 5.4 1.7 19 40 32 11 1.6 1.6 8 .90 4.2 165 13 6.1 1.6 23 43 31 10 2.5 1.5 9 .80 2.4 104 16 8.3 1.5 10 .70 1.8 110 15 9.1 1.2 28 68 28 6.6 .7 1.5

11 .80 1.4 144 13 8.4 1.0 22 68 27 8.5 .6 .5 12 .80 1.3 112 13 8.0 6.1 23 78 26 8.1 .6 .5 13 .80 1.2 135 12 12 24 23 77 25 7.8 .6 .4 14 .80 1.1 171 11 17 22 21 83 24 7.6 .6 .4 15 .90 1.1 133 10 8.6 19 20 80 24 7.6 .6 .4

16 .90 1.1 127 8.8 7.6 19 20 78 23 7.5 .6 .4 17 .SO 1.0 109 6.6 8.0 18 20 80 23 7.3 .6 .4 18 .80 l.C 82 6.0 6.8 18 29 80 22 7.1 .6 .4 19 .80 1.0 67 5.3 5.6 18 34 79 21 6.7 .6 .4 20 .80 1.0 54 5.6 5.3 19 33 77 21 6.0 .6 .4

21 .80 1.0 43 6.1 5.1 19 36 78 20 5.5 .6 .4 22 .80 .90 42 12 5.1 19 46 76 20 4.9 .6 .4 23 .80 .90 39 12 4.8 20 44 75 19 4.3 .6 .4 24 .80 .90 38 32 4.4 23 45 71 18 3.6 .6 .4 25 .80 .90 36 28 4.4 22 44 64 17 3.0 .6 .4

26 .80 .90 35 29 4.1 21 46 69 15 2.4 .6 1.4 27 .80 .90 34 28 3.9 21 49 72 14 1.6 .6 1.4 28 .80 .80 33 25 3.9 20 51 53 13 1.7 .6 1.4 29 .90 .80 36 20 20 47 49 13 2.6 .6 1.4 30 .90 .80 42 17 21 45 48 12 7.1 1.6 1.4 31 .90 50 16 25 48 5.0 1.6 805 226.6 51.5 44.4 MEAN .63 1.39 103 16.3 7.63 13.4 31.6 62.9 26.6 7.31 1.66 1.48 MX 1.0 T.8 910 41 17 25 51 63 60 13 2.5 1.7 MIN .70 .80 1.0 5.3 3.9 1.0 17 40 12 1.7 1.6 1.4 AC-FT 51 S3 6,350 1.120 424 827 1,880 3,870 1,600 449 102 68 SANTA ANA RIVER BASIN

11073000 SAN ANTONIO CREEK NEAR CLAREMONT, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND. MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

1 .90 1.1 8.1 1.8 .8 1. 9.3 .3 .3 .8 .45 2 .90 1.1 2.2 1.7 .6 1." 7.3 .7 .3 .7 .44 3 .90 1.2 2.4 1.6 .6 1. 6.1 .7 .3 .6 .53 4 .90 1.2 2.1 1.5 .6 1. 5.3 .8 .1 .5 .56 5 .90 1.2 2.0 1.5 .5 1. 1.1 .7 .2 .4 .49

6 .90 1.2 2.0 1.5 1.5 1. 1.1 .7 .2 l.l .40 7 .90 1.3 2.D 1.5 1.4 I. 1.1 .7 .2 .27 .38 8 .90 1.6 2.0 1.4 1.4 22 1.1 .7 .2 .27 .38 9 .90 1.5 1.9 1.4 1.5 5. 1.1 .1 .1 .26 .37 13 .90 1.3 1.7 1.4 l.B 4. 1.3 .7 .93 .26 .36 11 .90 1.3 1.7 1.4 1.8 3. 1.3 .7 .87 .25 .36 12 .90 1.2 1.9 1.4 1.7 3. 1.3 .8 .74 .24 .35 13 .90 1.1 1.8 1.4 2.3 9. 1.3 .7 .69 .25 .36 14 .90 1.1 1.7 1.4 2.7 11 1.3 .7 .71 .38 .40 15 .90 1.1 1.8 1.4 2.2 8. 1.3 .7 ,65 .60 .45 16 .90 1.1 1.7 1.4 2.1 8. 1.5 .6 .64 .68 .46 17 .90 1.1 1.9 1.4 2.0 7. 1.5 .6 .60 .78 .41 18 .85 1.2 1.8 1.5 1.9 3. 1.4 .5 .57 .81 .42 19 .95 9.4 1.7 1.5 1.9 2. 1.4 .3 .53 .78 .47 ?0 .96 19 1.6 1.5 1.8 2. 1.3 .2 .50 .83 .61 21 .96 10 1.6 1.5 1.7 1. 1.3 .1 .48 .80 .65 22 .1 6.0 1.7 1.5 1.6 1. 1.3 .2 .48 .68 .56 23 .1 4.0 1.7 1.5 1.5 1. 1.3 .2 .50 .68 .52 24 .1 3.0 1.9 1.5 1.4 1. 1.3 .1 .53 .64 .48 25 .1 2.0 2.0 1.5 1.4 1. 1.3 .0 .54 .63 .45 26 .2 2.0 1.9 1.7 1.4 1. 1.3 .98 .54 .64 .42 27 .2 2.0 .9 2.7 1.4 1. 1.3 .87 .56 .70 .43 28 .2 1.9 .9 2.3 1.3 1. 1.3 .85 7.1 .43 .43 29 .2 1.8 .9 2.0 1.3 I. 1.3 .2 18 .43 .50 30 .1 9.9 .9 2.0 0 1.3 .1 6.3 .43 .58 31 .1 .8 2.6 .43

MEAN .98 3.10 2.07 1.61 1.69 3.63 2.05 1.44 1 1.81 .72 .46 WAX 1.2 19 8.1 2.7 2.7 22 ^.3 2.1 18 1.8 .65 MIN .85 l.l 1.6 1.4 1.3 .90 1.1 .85 .48 .24 .35 AC-FT 60 44 27

DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 JAN FEB 1 3 .75 4 .76 .61 .72 .60 271 316 158 108 88 36 30 24 5 .75 .61 .69 .60 241 282 161 108 85 36 29 23

7 .69 .60 .68 .60 343 228 150 107 81 35 29 21 8 .66 .56 .66 .60 261 ?04 147 107 78 35 27 21 9 .65 .56 .61 21 10 21

12 .62 .55 .68 .80 133 152 137 104 68 33 29 20 13 .57 .60 .65 .90 131 138 135 103 64 33 29 20 14 32 29 20 15

16 .62 .76 .63 .80 128 118 129 102 57 31 29 19 17 55 31 29 19 18 19 19 .51 .70 .54 1.8 124 116 121 101 50 30 28 18 20 .52 .78 .56 15 124 116 119 101 48 30 28 18

21 .51 .73 .48 663 124 116 118 100 46 30 27 18 22 .49 .74 .39 17 23 .51 . 7 24 .56 . 3 .34 17 25 113 115 98 41 29 26 17

26 .54 . 2 1.5 2,400 814 116 114 98 41 32 26 17 27 .48 . 9 l.l 1,480 713 118 113 97 40 32 25 17 28 .51 . 2 .97 29 30 .59 .68 .80 412 118 110 95 38 30 25 15

MEAN .60 .65 .69 388 323 170 133 102 61.2 32.3 27.8 19.5 MIN .48 .46 .34 .60 122 113 110 94 38 29 25 15 SANTA ANA RIVER BASIN

SAN ANTONIO CREEK NEAR CLAREMONT, CALIF.--CONTINUED

DAY 1 JUL AUG SEP

1 15 17 14 12 13 30 19 15 12 .99 .76 .95 2 15 16 14 12 13 26 19 16 12 .92 .76 .95 3 15 16 13 12 13 21 19 15 12 .86 .76 . 9 * 15 16 13 12 13 19 19 15 12 .68 .76 . 5 5 16 16 13 12 13 20 19 15 12 .85 .76 . 5

6 15 16 13 12 13 19 20 15 12 .82 .76 7 15 IB 13 12 13 19 20 4 13 .62 .76 ll a 16 18 13 12 13 19 20 4 13 .62 .76 . 5 9 15 17 11 13 13 IB 20 4 13 .82 .82 . 5 10 15 17 12 14 20 19 20 4 13 .79 .82 . 5 11 14 17 12 14 20 19 19 4 13 .74 l.l .89 12 15 16 12 14 17 20 IB 3 13 .69 .83 .84 13 16 15 12 14 15 19 18 13 13 .69 .76 .88 14 16 15 12 14 14 19 IB 13 13 .69 .76 .88 15 16 16 12 14 14 20 18 13 13 .69 .76 .82 16 16 16 12 14 14 21 IB 12 13 .69 .76 .8 17 16 16 12 14 3 19 18 12 13 .69 .76 .8 IB 16 15 12 14 3 19 18 12 1C 1-2 .76 .8 19 16 14 12 14 3 20 IB 11 9. ) 1.3 .85 .7 20 16 15 12 14 3 20 18 11 9. > 1.1 .95 .7 21 16 15 12 14 3 20 18 11 10 .62 .93 .7 22 16 15 12 14 3 20 18 11 8. .69 .88 .6 23 16 14 12 14 3 19 18 11 3. .6 .88 .6 24 16 14 12 14 13 19 IB 11 1. .6 .88 .69 25 17 14 12 14 13 17 IB 11 4. .6 .88 .62 26 17 14 12 14 13 18 17 11 1. .6 .88 .62 27 17 14 12 14 13 19 17 11 1. .6 .80 .62 28 17 14 11 1* 22 19 17 11 1. .6 .95 .62 29 17 14 12 19 17 11 1. .69 .95 .56 30 17 14 12 19 17 12 1. .69 .95 .56 31 17 - 12 14 19

MEAN .80 .84 .81 MAX 17 IB 14 14 22 30 20 16 . 1 1.3 1.1 1.0 MIN 14 14 11 12 13 17 17 11 1. .62 .76 .56 782 55 49 52 48 77,570 X 30 MIN .56 AC-FT 8,050

COM] INED DISCHARGE, IN CUBIC FEET PER SECOND , OF SAN ANTONIO CREEK AND SOUTHERN CA1. IFORNIA ED4SON CO.'S SIERRA

DAY MAY JUN JUL AUG SEP 1 7.3 6.3 13 12 2 7.3 6.3 26 23 17 13 12 3 7.3 6.3 117 239 52 45 37 27 24 18 13 12 4 7.0 6.3 28 23 16 13 12 5 28 25 16 13 12 6 6.B 6.3 88 151 56 44 38 28 24 16 13 10 7 6.5 6.3 83 130 60 43 38 28 22 16 13 10 B 6.5 6.3 13 10 9 6.6 6.3 76 138 48 43 36 27 1 7 15 13 10 10 6.6 6.0 74 135 48 42 37 27 1 7 15 13 10

11 6.6 6.0 77 137 47 42 39 27 1 6 5 13 10 12 38 27 1 6 <4 13 10 13 .6 6.1 67 140 45 40 38 27 1 7 4 13 10 14 .6 6.B 56 143 43 40 36 27 1 6 4 12 10 15 .6 7.1 51 137 43 40 35 26 1 6 4 12 10

16 .6 B.O 50 128 42 40 34 25 1 6 14 12 10 17 .6 45 4B 121 42 41 34 25 1 6 14 12 10 IB 6.6 56 5 15 12 10 19 6.3 36 43 96 41 40 34 25 1 6 14 12 10 20 . 6.3 2B 41 90 41 39 34 25 1 6 14 12 10 21 6.3 20 41 86 40 40 33 25 1 5 14 12 10 22 6.3 658 42 78 40 40 31 24 1 5 13 12 10 23 6.3 470 41 73 39 41 30 25 1 5 13 12 10 24 6.3 426 25 1 6 13 12 10 25 6.3 436 6 14 12 10 26 6.3 22B 7 14 12 10 27 6.3 230 32 61 38 39 29 23 1 7 14 12 10 28 6.3 216 31 60 37 39 30 24 1 7 14 12 10 29 6.3 1B9 957 39 28 24 1 5 13 12 10 30 6.3 166 341 64 38 27 24 1 B 13 12 1C 31 6.0 385 310 MEAN 6.55 110 109 120 45.3 41.2 34.2 25.7 18.1 14.6 12.4 10.3 MAX 7.3 658 957 246 60 46 39 26 25 18 13 12 MIN 6.0 6.0 31 60 37 38 27 23 15 13 12 10 615

WTR rf 1966 TOTAL 40 SANTA ANA RIVER BASIN

11073000 SAN ANTONIO CREEK NEAR CLAREMONT, CALIF.--CONTINUED

COMBINED DISCHARGE) IN CUBIC FEET PER SECOND, OF SAN ANTONIO CREEK AND SOUTHERN CALIFORNIA EDISON CO.'S SIERRA CONDUIT NEAR CLAREMONT, CALIF., WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

DAY OCT JUN JUL AUG SEP 1 10 9.8 9.8 61 39 26 51 65 83 34 23 22 2 10 9.9 10 57 38 26 52 66 80 33 23 22 3 10 9.9 S3 58 38 26 51 63 75 33 23 22 4 10 9.9 23 55 35 26 52 64 70 34 24 22

6 11 1C 912 35 21 11 18 242 8 10 13 165 35 31 25 47 65 46 32 24 20 10 10 11 127 37 33 24 28 90 50 31 23 20 11 10 1C 162 35 32 24 22 89 49 30 23 20 12 10 10 122 36 32 29 23 100 48 30 23 20 13 10 10 138 19 IS 10 10 147 22 18 16 10 10 141 33 32 43 34 96 46 28 23 18 17 10 10 128 32 32 42 42 103 46 29 22 18 18 10 10 101 30 31 41 51 103 45 29 23 18 19 10 10 87 29 30 41 55 102 44 28 23 18 20 10 1C 74 30 29 42 54 100 44 28 23 18 21 10 10 63 29 29 42 55 101 43 26 22 18 22 10 10 62 34 29 43 69 101 43 26 22 18 24 10 9.7 58 53 28 46 65 94 41 25 22 18 25 10 9.7 56 50 28 45 64 87 40 23 21 18

26 10 9.7 55 53 27 44 61 92 38 23 22 18 27 10 9.7 S3 53 27 44 70 95 37 20 22 18 28 10 9.6 SI 50 27 44 72 76 35 23 22 18 29 9.9 9.6 55 44 ______43 68 72 35 24 22 17

MEAN 10.1 10.3 117 40.9 31.6 36.7 48.3 84.7 49.0 28.6 22.8 19.1 MAX 11 18 912 61 40 49 72 105 83 35 24 22 MIN 9.9 9.6 9.8 29 27 24 20 62 34 20 21 17

7,830

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SAN ANTONIO CREEK AND SOUTHERN CALIFORNIA EDISON CO. CONDUIT NEAR CLAREMONT, CALIF., WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

30 14 23 16 15 ______15 21 17 14 31 14 16 15 15 17

TOTAL 476 474 528 494 461 604 620 608 466 MEAN 15.4 15.8 17.0 15.9 15.9 19.5 20.7 19.6 15.6 MAX 17 30 22 18 18 43 24 21 17 MIN 14 13 16 15 14 14 19 17 14 980 914 It 200 1,230 1.210 928 CAL YR 1967 TOTAL 12,481.0 MEAN 34.2 MAX 105 MIN 13 AC-FT 24.760 WTR YR 1968 TOTAL 5.716.0 MEAN 15.6 MAX 43 MIN 1.4 AC-FT 11.340 SANTA ANA RIVER BASIN

11073000 SAN ANTONIO CREEK NEAR CLAREMONT, CALIF.--CONTINUED COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SAN ANTONIO CREEK AND SOUTHERN CALIFORNIA EDISON CO. CONDUIT NEAR CLAREMONT, CALIF., WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

I 9.8 9. 9.1 3T3 375 152 110 92 37 29 24 2 9.9 9. . 9.2 335 343 159 109 91 37 30 24 3 10 9. . 9.1 304 331 169 109 90 37 30 24 4 10 9. . 9.0 271 316 158 108 88 36 30 ?4 5 10 » 9.0 241 282 161 108 85 36 ?9 23 6 9.9 9. . 9.0 364 248 159 108 83 35 29 22 7 9.9 9. . 9.0 343 228 150 107 61 35 29 21 8 9.9 9.0 261 204 47 107 78 35 27 21 9 9.6 9. 1 '. 9.0 21 10 9.6 9. 9.0 164 179 41 106 73 34 29 21

It 9.5 9> 8. 9.1 138 164 39 105 71 34 28 21 12 9.8 9. 8. 9.2 133 152 37. 104 68 33 29 20 13 9.8 9. 8. 9.3 131 138 135 103 64 33 29 20 14 9.8 9. 8. 11 128 126 133 103 62 32 29 20 15 9.9 10 8. U 128 118 131 102 59 31 29 19 16 9.6 9. 8. 11 128 118 129 102 57 31 29 19 17 9.6 9 a 8. U 126 116 127 102 55 31 29 19 18 9.5 9. 8. 11 126 116 124 102 52 30 29 19 19 9.5 8. 8. 17 124 116 121 101 50 30 28 ia 20 9.5 1- 8. 37 124 116 119 101 48 30 28 18 21 9.5 . 3 a. 685 124 116 118 100 46 30 27 ie 22 9.5 2. 8. 462 122 116 117 100 45 30 27 17 23 9.5 9. 8. 322 24 9.6 9. 10* 522 ' 450 116 115 99 42 29 26 17 25 9.6 * 4.430 2.070 113 115 98 41 29 26 17 26 9.5 9. 11 2.400 814 116 114 98 41 32 26 17 27 9.5 9. 10 1.480 713 118 113 97 40 32 25 17 28 9.5 9. 9. 510 425 115 112 97 39 30 25 16 29 9.5 9. 9. 440 114 111 96 39 30 25 16 30 9.6 9. 9. 412 ...... 118 110 95 38 30 25 15 31 9.6 136 94 30 25 302 861 585 MEAN 9.68 8.5C MAX 10 10 110 92 37 30 24 MIN 9.5 .73 8.3 9.0 122 111 110 94 38 29 25 15 1,160

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SAN ANTONIO CREEK AND SOUTHERN CALIFORNIA EDISON CO.'S SIERRA CONDUIT NEAR CLAREMONT , CALIF., MATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 JUN JUL AUG SEP 1 15 17 14 12 13 30 19 15 12 8.7 7.4 .4 . 2 15 16 14 12 11 26 19 16 12 .6 7.4 3 15 16 13 12 13 21 19 15 12 1.6 7.4 4 15 16 13 12 13 19 19 15 12 1.6 7.3 , 5 16 16 13 12 13 20 19 15 12 1.5 7.3 6 15 16 13 12 13 19 20 15 12 .4 7.4 ^ 7 15 18 13 13 19 20 14 13 1.4 7.6 ,, 8 16 18 13 13 19 20 14 13 1.3 7.0 ,. 9 15 17 11 13 IB 20 14 13 1.2 7.0 h- 10 15 17 12 20 19 20 14 13 8.2 7.0 11 14 17 12 20 19 19 14 13 .1 7.C . 12 15 16 12 17 20 18 13 13 .1 7.0 13 16 15 12 15 19 18 13 13 .0 7.0 14 16 IS 12 14 19 18 13 13 .0 6.5 ,, 15 16 16 12 14 20 18 13 13 7.9 7.0 16 16 16 12 13 21 18 12 13 .6 7.0 ^ 17 16 16 12 13 19 16 12 13 .8 6.8 . 18 16 15 12 13 19 18 12 1 - .6 6.5 19 16 14 12 13 20 18 11 .8 .8 6.0 . 20 16 15 12 13 20 18 11 .9 .7 6.0 21 16 15 12 13 20 IB 11 j .7 6.4 a 22 16 15 12 13 20 18 11 .6 .6 7.6 23 16 14 12 13 19 16 11 .5 .6 7.4 ,. 24 16 14 It. 13 19 ie 11 .4 .6 7.0 . 25 17 14 12 13 17 18 11 3 .6 6.9 26 17 14 12 13 18 17 11 .2 .5 6.6 .3 27 17 14 12 13 19 17 11 .1 .5 6.6 .6 28 17 14 12 22 19 17 11 .0 .5 4.6 .6 29 17 14 12 ...... 19 17 11 8.9 .4 8.2 .6 30 17 14 12 . 19 17 12 8.8 .4 8.0 .8 31 17 12 19 ..... 12 ...... 4 7.4 -- TOTAl 492 464 381 41 395 614 551 394 337.5 24 .3 216.3 19 .4 MEAN 15.9 15.5 12.3 13. 14.1 19.8 18.4 12.7 11.3 7 95 6.98 6 35 MAX 17 ie 14 1 22 30 20 16 13 .7 8.2 .6 HIN 14 14 11 12 13 17 17 11 8.8 .4 4.6 .0 AC-FT 976 920 756 827 783 1.220 1.090 782 669 89 429 378 CAL YR 1969 TOTAl 39.392 .0 MEAN 108 MAX 4,430 HIN 9.0 AC-FT 78.130 MTR YR 1970 TOTAL 4.698 .5 MEAN 12.9 MAX 30 HIN 4.6 AC-FT 9.320 SANTA ANA RIVER BASIN

11073200 SAN ANTONIO CREEK BELOW SAN ANTONIO DAM, CALIF. LOCATION.--Lat 34°09'26", long 117°40'50", in NEWE^SE"* sec.23, T.I N., R.8 W. , on Los Angeles-San Bernardino

DRAINAGE AREA.--26.9 sq mi. PERIOD OF RECORD.--October 1962 to September 1970. GAGE.--Water-stage recorder. Datum of gage is 2,093.94 ft above mean sea level (Corps of Engineers bench mark). AVERAGE DISCHARGE.--8 years, 13.9 cfs (10,000 acre-ft per year). EXTREMES.--Maximuras and minimums (disc or t e water year 1966-70 are contained in the following'table:»ing t able: Minimurn Wtr yr Date Dis charge G.H. Date Discharge 1966 Dec. 30 1965 920 3.15 Most of time 0 1967 Dec. 3,900 do. 0 1968 Jan. 601 2.73 0 1969 Jan. 25 1969 8,420 11.22 do . 0 1970 Mar. 2 1970 78 1.55 do. 0

Period of record: Maximum discharge, 8,420 cfs Jan. 25, 1969 (gage height, 11.22 ft), from rating curve extended above 400 cfs on basis of gate openings at dam; no flow for most of time in each year. REMARKS.--Records good. Flow regulated by San Antonio flood-control reservoir (capacity, 7,620 acre-ft, Santa Ana River basin elsewhere in this report.

COOPERATION.--Six discharge measurements furnished by Los Angeles County Flood Control District. DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

JUN JUt. 1 0 165 2C1 26 . 1.4 2 0 89 236 B .20 3 0 45 216 6 .20 4 0 45 186 4 .20 5 C 45 172 0 .20

7'6 0 45 179 8 .9 .20 0 45 179 8 0 8 0 43 148 8 0 9 0 41 144 8 O 10 0 38 134 8 0 11 0 38 117 8 C 12 0 36 108 8 0 13 0 30 53 6 0 14 0 26 32 6 D 15 0 26 30 6 0

16 0 28 28 7 0 17 .20 28 26 1 0 18 0 23 26 4 0 19 0 7 43 : .00 20 C 8 53 2 .00 21 0 7 51 16 .90 0 22 C 4 47 14 .90 0 23 118 4 47 10 .90 0 24 124 2 45 7.6 .90 0 25 208 10 43 7.6 .90 0 26 212 9. 41 6.9 .90 C 27 224 8. 36 6.9 .90 0 28 216 5. 36 6.9 26 0 29 176 6. 32 26 0 30 172 436 28 17 0 31 229 26 9.2

TOTAL 0 MEAN 0 48.3 52. 88. S 19.2 7.84 .080 0 MAX 0 224 43 236 41 26 1.4 0 MIN 0 05. 26 6.9 .90 0 0 AC-FT 0 2t88C 3,24 5.440 1.070 482 4.8 0

HTR YR 1966 TOTAL 6,608.80 MEAN 1B.1 MAX 436 MIN 0 AC-FT 13,110 SANTA ANA RIVER BASIN

11073200 SAN ANTONIO CREEK BELOW SAN ANTONIO DAM, CALIF.--CONTINUED

DISCHARGE, IN CUBIC TEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

DAY DCT NOV OEC J JUN JUL

1 0 08 .50 0 12 22 «7 .20 2 0 07 .40 0 8.4 22 3 .20 3 0 07 .40 C 18 22 .1 .20 4 C 06 .40 C 24 22 }8 .20 5 C 06 .40 C 26 22 38 .20 6 0 526 16 16 0 24 22 B .20 7 .20 544 7. b 24 0 13 22 I .20 B .50 165 3. , 23 0 13 22 8 .20 9 .10 143 6. 17 0 13 22 4 .20 10 0 127 3. 9.4 0 20 22 2 .20 11 0 111 4. .20 C 23 23 0 .20 12 0 101 0 .20 0 23 23 0 .20 13 0 101 0 .20 14 23 24 0 .20 14 3 111 0 24 26 23 24 C .20 15 0 114 0 18 34 23 24 6 .20 16 0 95 0 3.4 34 23 24 4 .20 17 0 85 0 .20 36 23 35 B .20 IB 0 B8 0 .10 36 23 .49 8 '.40 19 0 75 0 .1C 26 23 49 3 .70 20 C 62 0 .1C 26 23 49 6 .20 21 0 34 0 .10 26 23 51 4 .20 22 0 24 0 .20 IB 23 53 2 .20 ?3 0 24 2 .20 11 23 55 0 .10 24 0 24 4 .1C .20 23 55 9.2 12 25 0 24 4 .10 .20 23 55 8.4 13 26 0 24 4 .10 .20 23 55 6.9 3 27 0 24 3 0 20 23 53 1.4 0 28 0 24 2 0 30 23 53 .20 0 29 0 23 b ' 26 23 53 .20 0 30 0 18 24 23 53 .20 0 31 18 tO 22 __- 53 TOTAL 0 .80 2.709 35 . SO 138.80 409.60 631.4 1,133 7 )7.50 30.20 MEAN MAX MIN 0 0 0 . 000 8.4 22 .20 0 AC-FT 0 1.6 5,370 7 1 275 812

DAY JUN JUL

1 0 0 C 2.1 0 2 0 14 0 .20 0 3 0 0 C .10 0 4 0 0 C .1C 0 5 0 0 0 .10 0 6 0 0 0 .10 0 7 0 0 0 .20 0 a 0 0 .10 .40 0 9 0 0 .20 .73 0 10 0 0 .20 2.8 0 11 0 0 .20 .70 0 12 0 0 .20 0 0 13 0 0 .20 0 0

31 TOTAL 15.30 MEAN .49 MAX 8.1 MIN AC-FT

MIN 0 AC-FT SANTA ANA RIVER BASIN

11073200 SAN ANTONIO CREEK BELOW SAN ANTONIO DAM, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 196B TO SEPTEMBER 1969

452 12 54 63 7.5 350 IBS

238 180 180 180 172 171 196 119

' 45 22 31 104 86 40 24 0 23 33 107 *7 B4 43 24 0 24 353 161 52 B6 45 21 0 25 3,250 3,760 52 91 50 18 0

26 2.260 1,570 52 94 56 14 D 27 785 1.5 50 91 59 12 3 28 6B9 1,4SD 63 81 56 11 0 29 472 73 30 325 iinii 76 52 59 8.2 0 31 223 * 73 63 . 0 TOTAL 000 B, 432. 50 MEAN 0 0 0 272 359 121 87.1 57.0 29.3 1.22 MAX 000 3,250 3,760 452 112 78 63 26 0000 8.2 0 AC-FT 000 16,730 19,930 7.430 5,180 3,500 1,750 75

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO SEPTEMBER 1973

30 0 .36

TOTAL 0 .51 0 0 1.5 162.47 0 0 MEAN 0 .017 0 0 .054 5.24 0 0 MAX 0 .36 0 0 1.5 59 0 0 MIN 00000 .09 0 0 AC-FT 0 1.0 0 0 3.0 322 0 0

CAL YR 1969 TOTAL 27,522.41 MEAN 75.* MAX 3,760 MIN 0 »C-FT 5*.590 SANTA ANA RIVER BASIN ' 4S

11073360 CHINO CREEK AT SCHAEFER AVENUE, NEAR CHINO, CALIF. LOCATION.--Lat 34°00'14", long 117°43'34", in Santa Ana del Chino Grant, San Bernardino County 9" ^fjj* J""J f 300 ft downstream from Schaefer Avenue, 0.8 mile downstream from San Antonio Creek, and l.S miles southwest of Chino. DRAINAGE AREA.--48.9 sq mi. PERIOD OF RECORD.--October 1969 to September 1970. GAGE.--Water-stage recorder. Altitude of gage is 685 ft (from topographic map). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water year 1970 are contained in the following table:

Annual maximum discharge (*), peak discharges above base (200 cfs), and annual minimum discharge Maximum Minimum daily Wtr yr Date Time Disch. G.H. Date Discharge 1970 Jan. 16, 1970 1430 964 5.47 Jan- 13, 1970 .07 Feb. 10, 1970 2045 904 5.42 Mar. 1, 1970 1515 *1,520 5.84 Mar. 4, 1970 2130 880 5.40

Period of record: Maximum discharge, 1,520 cfs Mar. 1, 1970 (gage height, 5.84 ft), from rating curve extended above 7.4 cfs on basis of computation of flow in concrete-lined channel at 1,600 cfs; minimum daily, 0.07 cfs Jan. 13, 1970. Flood of Jan. 25, 1969, 9,200 cfs (gage height, 9.23 ft, present datum), by contracted-opening measurement at site 6.1 miles downstream. REMARKS.--Records good except those for period of no gage-height record Oct. 1 to Nov. 25, 1969, which are poor. Flow partly regulated by San Antonio flpod-control reservoir (capacity, 7,620 acre-ft). Natural streamflow affected by extensive ground-water withdrawals, diversions for power, domestic use, irrigation, and return flow from irrigated areas. Water-quality records for the water year 1970 are published in reports of the Geological Survey. See schematic diagram of Santa Ana River basin elsewhere in this report.

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 1973

DAY OCT NOV DEC JUN JUL AUG SEP

1 .90 .50 .65 .29 .44 307 .48 .73 .4B .49 .36 .43 2 .60 .50 .54 .30 .42 91 .49 .71 .49 .52 .33 .44 3 4 .65 2.1 .52 .23 .26 129 .52 .77 .50 .55 .31 .44 5 .62 2.2 .76 .20 .32 17 .54 .63 .59 .42 .27 .52 ".31 6 .60 2.3 .37 .22 .41 .46 .69 .39 .52 .30 .39 7 .57 2.5 e .55 2.0 6.2 .30 .19 .29 .31 .90 .61 .32 .53 .45 9 .54 1.5 .30 3.3 1.9 .66 .34 .66 .56 .53 .46 .36 10 .53 .15 20 215 .30

11 .52 .90 .17 9.9 4.9 .31 .36 .74 .40 .43 .37 .30 12 .51 .60 .14 2.0 .20 .36 .37 .37 .45 .40 .32 .35 13 .31 14 .50 .60 .15 16 .23 .35 .39 .50 .34 .52 .34 .32 15 .50 .59 .17 7.2 .18 .37 .35 .53 .36 .45 .2B .37

16 .50 .56 .16 66 .20 .35 .41 .62 .40 .36 .29 .43 17 .50 .57 .21 .42 .21 .26 .43 .56 .36 .35 .31 .37 IB .50 .30 .22 19 .50 .55 .25 .24 .16 .31 .69 .52 .39 .70 .33 .30 20 .50 .54 .19 .21 .16 .31 .44 .46 .36 .33 .33 .27

21 .50 .53 .19 .23 .20 .34 .55 .44 .36 .34 .34 .26 22 .50 .52 .41 .31 .20 .27 .50 .47 .31 .36 .31 .29 23 .50 .51 .22 .39 .21 .32 .58 .55 .31 .50 .32 .29 24 .50 .50 .16 .39 .23 .35 .65 .46 .36 .37 .37 .34 25 .50 .33

26 .50 .50 .23 .27 .25 .38 .71 .45 .70 .32 .36 .45 27 .50 .61 .14 26 .50 .70 .15 .43 113 .36 .70 .41 .33 .42 .52 .36 29 .50 .62 .16 .53 «« - .33 .66 .53 .40 .43 .41 .36 30 .50 .BO .19 .50 ------7.9 .69 .61 .$2 .37 .49 .69 31 .50 .23 .43 1.4 .72 .38 .57

TOTAL 16.99 27. 4B 16.55 133.77 340.79 562.06 15.22 19.40 13.62 13.31 11.33 11.26

MAX .90 2.5 6.2 66 215 307 .73 .90 1.2 .70 .57 .69 MIN .50 .50 .10 .07 .16 .27 .31 .37 .31 .26 .27 .22 AC-FT 34 55 33 265 676 1.110 30 36 27 26 22 22

WTR YR 1970 TOTAL SANTA ANA RIVER BASIN

11073440 CHINO CREEK NEAR CHINO, CALIF. LOCATION.--Lat 33°56'22", long 117°38'58", in El Rincon Grant, San Bernardino County, on first pier from right bank on downstream side of Euclid Avenue bridge, 5.6 miles southeast of Chino. DRAINAGE AREA.--107 sq mi. PERIOD OF RECORD.--January 1968 to September 1969 (discontinued). GAGE.--Water-stage recorder. Altitude of gage is 500 ft (from topographic map). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (200 cfs), January 1968 to September 1969 Date Time Disch. Date Time Disch. G.H. Date Time Disch. Mar. 8, 1968 *6,000 Jan. 14, 1969 0200 270 3.90 Feb. 6, 1969 0400 2,040 Jan. 21, 1969 1031 1,660 5.55 Feb. 15, 1969 0200 1,130 Dec. 25, 1968 1830 Jan. 25, 1969 1300 *9,200 a9.3 Feb. 25, 1969 - 2,700 a From floodmark. No flow for many days in each year. Period of record: Maximum discharge, 9,200 cfs Jan. 25, 1969 (gage height, 9.3 ft, from floodmark), from rating curve extended above contracted-opening measurement at gage height 8.2 ft; no flow for some days in each year. REMARKS.--Records good prior to Jan. 24, 1969, and poor thereafter. No gage-height record Jan. 25 to May 13, Aug. 7 to Sept. 30, 1970. Flow partly regulated by San Antonio flood-control reservoir (capacity, 9,110 acre-ft). Natural streamflow affected by extensive ground-water withdrawals, diversions for power, domestic use, irrigation, and return flow from irrigated areas. See schematic diagram of Santa Ana River basin else­ where in this report. Water-quality records for the water year 1969 are published In reports of the Geologi­ cal Survey.

DISCHARGE, IN CUBIC FEET PER SECOND, JANUARY TO SEPTEMBER 1968

MAY JUN JUL AUG SEP

1 .40 .70 1.7 3 1.5 1.0 .20 S 0 2 .40 .60 2.6 1 1.7 .60 .40 .20 0 3 .40 1.0 1.8 .6 1.8 .60 .SO .20 0 4 .40 1.0 .70 .0 1.4 .90 .20 .20 0 5 .40 .10 .90 6 1.4 1.1 .20 0 0 6 .30 .20 8.7 .6 1.2 1.4 .40 .20 1.4 7 .30 .20 36 .^ l.l 1.4 1.6 1.1 3.3 8 .30 .20 22C .1 1.1 2.1 1.1 .50 2.2 9 .30 1.6 12 B 4 2.9 2.2 1.4 .30 .20 10 .40 3.5 7.2 .4 2.1 2.5 1.8 .60 .50 11 .40 .40 6.0 .4 .60 3.4 2.8 .50 1.7 12 .40 .20 5.7 ^3 .90 3.4 2.2 .30 2.6 13 .40 8.5 8.5 .7 .TO 2.6 .40 .40 2.8 14 .40 18 6.4 .6 2.3 2.2 .40 .10 3.4 15 .40 1.2 4.6 .8 1.9 2.0 .10 1.5 .60 16 .40 1.2 4.4 .6 1.2 2.0 0 1.5 1.7 17 .20 1.2 18 .50 1.0 4.C .4 .40 1.4 1.5 2.0 2.6 19 .60 1.3 3.8 .4 .20 2.6 .90 0 2.1 20 .60 1.7 3.3 .8 1.2 2.3 1.8 0 2.4

21 .60 1.0 2.7 .B 1.6 1.6 .20 .10 2.0 22 .10 2.0 3.0 .6 .40 .40 .90 .20 1.8 23 .10 2.6 2.8 .6 .30 .40 .80 0 .60 24 0 1.6 1.8 .2 .40 1.2 .80 0 .50 25 .60 2.6 2.1 .4 .90 1.2 .80 0 .60 26 .30 1.0 2.8 .2 .80 1.8 .60 0 .10 27 49 2.6 2.8 .4 .60 2.1 1.1 0 0 28 13 1.4 3.2 .8 .60 2.0 5.S 0 0 29 1.3 1.5 3.0 .0 1.6 1.6 3.5 0 0 30 .40 2.6 .0 2.1 .60 0 0 0 31 2.2 1.4 .10 0 TOTAL MEAN 2.44 2.07 12.0 3.48 1.25 1.66 1.09 .35 1.20 MAX 49 18 220 32 2.9 3.4 5.5 2.0 3.4 MIN 0 .10 .70 1.0 .20 .40 0 0 0 AC-FT 150 119 737 207 77 99 67 22 72 SANTA ANA RIVER BASIN

11073440 CHINO CREEK NEAR CHINO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

DAY OCT NOV DEC AUG SEP

1 .05 1.1 1.1 .5 1B9 651 .0 .4 .2 1.4 .23 .48 2 .43 .61 1.1 .3 343 543 .8 B I .3 1.8 .01 .46 3 1.3 .09 .94 .2 212 238 .7 .8 .3 1.8 .34 .45 4 1.0 .01 1.5 .2 201 23 .6 .6 .6 1.6 .IT .45 5 1.2 .10 1.5 .1 708 11 6 .4 .4 1.4 0 .44 6 1.2 .39 1.1 .1 601 7> >5 .2 .2 1.4 .03 .38 7 .14 1.1 .61 .4 32 5. .4 .9 .2 1.2 .15 .30 8 1.3 .07 .89 .4 2C 8. 6 .8 .0 .91 .20 .21 9 1.7 .02 .37 .4 23 8. . 8 ,7 .8 .70 .21 .15 10 1.8 .77 .09 .4 83 8. .0 .6 .8 1.2 .23 .05 11 1.7 1.2 .52 .4 246 8. <2 .8 .8 1.1 .30 .20 12 1.2 .16 .13 .4 351 B. .4 .2 .7 1.1 .35 .23 13 .07 1.1 .87 .6 175 8. .7 .7 .7 .53 .50 .24 14 0 2.8 1.5 7 15 8. .8 .2 .7 .48 .55 .28 15 .74 B.9 .01 .2 13B 8. .0 4 .0 .43 .62 .30

16 1.0 2.6 3.8 .2 16 8. .4^ .6 .8 .38 .75 .32 17 1.0 2.0 1.4 .1 11 8. .7 .4 .8 .38 .82 .33 IB 1.2 2.1 .13 .6 75 8. 8.2 .2 .8 .52 .84 .34 19 1.1 2.6 .06 4 56 8. 8.4 .0 .6 .64 .85 .34 20 1.3 2.6 1.1 46 18 7. 8.7 .7 .6 1.0 .80 .35

21 1.3 2.4 .30 315 20 7. 8.8 .2 .0 .64 .72 .36 22 2.3 2.2 .26 47 161 7. 8.6 .8 .8 .20 .66 .37 23 2.4 2.3 .02 16 764 7, 8.2 .8 .6 .34 .61 .50 24 1.8 2.3 .20 1, 130 807 7. B.O .6 .4 .48 .59 .90 25 .61 1.3

26 2.0 1.8 2C 1, 50 938 6. 7.1 .4 .2 .34 .59 .2 27 1.4 2.0 3.8 63 123 6. 6.7 .3 .8 .30 .56 .1 26 1.2 1.7 3.2 80 1,170 6. 6.3 .0 .8 .26 .53 .0 29 1.5 .84 2.8 94 6. 6.0 .4 .6 .15 .52 30 5.4 .84 1.8 51 .- 5.7 .4 .6 .17 .51 .0 31 1.1 1.3 72 6. .3 .26 .50 TOTAL 41.8 48.60 78.40 11, 544.5 8,718 1, 662. 203.5 11 .3 6 .7 23.54 14.35 15. 03 MEAN 1.3 1.62 2.53 372 311 53. 6.78 3 85 2 32 .76 .46 .50 MAX 5. 8.9 .4 .85 1.3 H{ti '.2 .15 0 .05 .01 .01 1.1 11 5.0 5.4 ».7 ? AC-FT 8 4A LI 28 30 CAL YR 196B TOTAL 949. 83 MEAN 2.60 MAX 220 WIN 0 AC-FT 1,880 WTR YR 1969 TOTAL 22,539. 05 MEAN 61.8 MAX 3,680 MIN 0 AC-FT 44,710 248 SANTA ANA RIVER BASIN

11073470 CUCAMONGA CREEK NEAR UPLAND, CALIF. LOCATION.--Lat 34°10 1 26" ) long 117°37 1 51", in SHHSEW.; sec.17, T.I N. , R. 7 W. , San Bernardino County, on right bank 0.5 mile downstream from unnamed tributary and 5.3 miles north of Upland. DRAINAGE AREA.--10.1 sq mi.

GAGE.--Water-stage recorder. Broad-crested weir since December 1938. Datum of gage is 2,365 ft (revised) above mean sea level. See WSP 1928 for history of changes prior to Dec. 14, 1938. Dec. 14, 1938, to Aug. 5, 1969, at present site at datum 2.00 ft higher. AVERAGE DISCHARGE.--43 years, 8.02 cfs (5,810 acre-ft per year); median of yearly mean discharges, 5.0 cfs (3,600 acre-ft per year). EXTREMES.--Maximuns and mini mums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (80 cfs), water years 1966-70 e Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. . 17, 1965 - 770 4.70 Jan. 24, 1967 1900 199 35.33 Jsn. 25, 1969 (b) 14,100 a!4.44 . 22, 1965 1800 *2,000 a8. 22 Msr. 13, 1967 2000 119 34.73 Feb. 6, 1969 0545 545 a6.27 . 29, 1965 1715 1,160 a7.28 Feb. 25, 1969 0700 4,090 39.51 Nov. 19, 1967 1100 *196 35.12 . 3, 1966 0900 1,000 a7.06 Feb. 28, 1970 - 160 . 6, 1966 0200 *1,320 a7.50 Jan. 21, 1969 0800 946 36.98 3 Present datum. b Occurred 0930 to 1000 hours.

Annual minimum daily discharge, water years 1966-70 Wtr yr Date Discharge Wtr yr Date Discharge 1966 Oct. 28, 1965 .90 1969 Nov. 29, 1968 .45 1967 Oct. 24-26, 1966 2.5 1970 Aug. 25, 1970 1.1 1968 Sept.26, 1968 2.2 Period of record: Maximum discharge, 14,100 cfs Jan. 25, 1969 (gage height, 14.44 ft, present datum), from rating curve extended above 450 cfs on basis of slope-area measurements at gage heights 6.22 and 12.44 ft; minimum daily, 0.30 cfs Oct. 5, 6, 1961. REMARKS. --Records good except those for periods of no gage-height record, which are poor. No regulati diversion above station. See schematic diagram of Santa Ana River bas n elsewhere in this report. REVISIONS (WATER YEARS). --WSP 1041: 1944. WSP 1215: 1950. WSP 1315-B: 1937(M).

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 o»v OCT NOV DEC 1 .3 29 63 14 2 .2 27 50 14 3 .3 25 44 13 11 B.O 5.2 4 .3 23 41 13 5 .4 21 39 12 11 7.2 5.1 5.1 3.9 3.5 3.7

6 .3 20 35 21 11 6.6 5.0 4.8 3.9 3.5 3.8 7 .3 19 31 26 8 .3 17 29 22 9 .4 19 26 19 10 6.5 5.8 5.1 3.9 3.5 3.7

11 .2 16 24 17 10 6.4 5.9 4.6 3.B 3.7 3.8 12 .1 19 22 16 11 6.4 5.6 4.6 3.B 3.3 3.8 13 .3 IB 19 15 15 .7 16 18 14

16 .8 20 16 20 14 17 .7 150 14 19 14 18 .6 BO 14 18 13 11 6.2 4.9 4.1 3.6 3.8 3.3 19 .6 35 13 17 13 20 .4 23 12 17 12 21 .1 19 11 16 12 23 .1 312 11 15 11 24 .1 244 10 14 11 10 6.0 S.I 4.1 3.5 3.5 2.9

26 .0 68 9.7 13 12 9.1 6.0 5.5 4.1 3.5 3.6 2.7 27 .0 53 9.4 13 13 28 .90 45 9.5 13 12 29 .0 39 280 13 B.B 6.0 5.5 3.8 3.7 3.8 2.B 30 .0 33 161 14 31 .0 80 14 8.0 5.5 3.8 4.3

MEAN .28 55.1 31.5 MAX l.B 396 280 63 26 12 B.O 5.9 5.5 4.1 4.3 4.4 AC-FT 79 3,280 1,940 1,450 809 616 3B5 326 267 230 225 202

MTR VR 1964 TOTAL 4,941.00 MEAN 13.5 MAX 396 MIN .90 AC-FT 9, BOO SANTA ANA RIVER BASIN

11073470 CUCAMONGA CREEK NEAR UPLAND, CALIF.--CONTINUED

OISCHARGEi IN CUBIC FEET PER SECOND, NATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

OCT NOV DEC JUN JUL AUG >EP 1 2.9 2.7 4.1 8.3 IS 12 20 30 19 9.3 8.7 .3 2 3.0 2.9 5.9 8.5 19 11 20 30 19 9.6 8.7 .3 3 3.1 3.0 332 7.9 19 11 19 30 18 9.6 8.6 .3 4 3.1 3.1 180 7.5 18 12 23 30 18 9.6 8.5 .2 5 3.1 3.1 323 7.4 17 12 24 29 18 9.2 8.1 .2 6 3.0 3.3 421 7.3 16 12 22 28 17 9.7 9.0 .2 7 3.0 9.2 SO 7.5 IS 11 23 28 17 9.7 9.0 .2 8 2.8 5.7 60 7.8 15 11 23 29 17 9.4 9.3 .2 9 2.7 4.1 48 7.4 14 11 22 30 16 9.2 9.2 .2 10 2.9 3.6 41 7.4 14 12 22 32 16 8.9 8.9 .2 11 3.1 3.4 36 7.4 14 18 27 31 6 8.8 8.S .0 12 3.1 3.3 32 7.4 14 27 24 29 6 8.5 8.7 .0 13 3.1 3.3 30 7.2 14 101 23 28 5 8.5 8.7 .0 14 2.9 3.0 28 6.8 14 64 23 27 5 8.4 8.6 .0 15 2.9 3.0 26 6.2 14 41 23 26 4 8.8 9.4 .0 16 2.9 3.1 24 6.1 13 33 23 25 14 8.7 8.0 .a 17 2.8 3.1 22 6.1 13 8.5 .8 .8 18 2.7 3.2 21 6.3 13 28 26 25 13 8.4 .8 .8 19 2.7 3.1 9 6.0 13 27 28 25 12 8.2 .8 .8 20 2.7 3.2 8 6.0 13 25 30 25 12 8.2 .7 .8 21 2.9 3.4 7 10 13 21 32 25 11 8.0 .7 '.e 22 2.8 3.5 6 47 13 19 36 24 11 8.4 .6 23 2.6 3.7 4 47 13 18 38 24 10 8.5 .7 24 2.5 3.6 4 50 12 18 34 24 10 8.5 .9 25 2.5 3.5 13 23 12 19 32 24 10 8.4 .9 .7 26 2.5 3.6 12 15 12 19 31 23 9.8 8.3 .9 27 2.7 3.7 11 16 12 19 31 ?3 9.7 8.3 .2 lt> 28 2.9 4.3 10 15 12 19 31 23 9.6 8.4 .3 .6 29 2.8 4. 9.6 15 19 31 22 9.4 8.5 .2 . 6 30 2.8 3. S.9 16 18 31 22 9,4 8.6 .0 .6 31

TOTAL 8S.2 no. 1,865.1 413.2 399 716 796 818 414.9 271.8 23 .0 17 .2 MEAN 2.85 MAX 3.1 9. 421 50 19 101 38 32 19 9.7 .4 .3 MIN 2.5 2. 4.1 6.0 12 11 19 21 9.4 8.0 .6 .6 AC-FT 175 21 3,740 820 823 539 56 53 CAL YR 1966 TOTAL 4.3S5.2 MEAN 11.9 M iX 421 HIN 2.5 AC-FT 8,640 MIN 2.5 AC-FT 12,540

DISCHARGE, IN CUBIC FEET PER SEC WO, NATER YEAR OCTOBER DAY OCT NOV DEC JAN F B MAR APR MAY JUN JUL AUG SEP 1 6.0 2 6.0 3 4 5 6 5.8 7 5.7 4.8 8.1 a 9 5.6 4.8 7.4 5.6 6.5 11 10 5.6 4.9 7.1 5.7 7.2 10 11 12 13 14 15

16 17 IB 19 20 21 4.8 27 22 23 24 4.8 25 26 27 4.8 28 29 30 4.5 11 31 4.6 5.6 5.3 6.1 3.5 2.6 2.3 TOTAL 164.4 259.6 221.7 178.6 177.4 226.3 170.0 160.1 123.3 98.2 78.3 73.6 MEAN 5.30 8.65 7.1* 5.76 6.12 7.30 5.67 5.16 4.11 3.17 2.53 2.45 MAX 6.0 37 11 7.1 8.1 16 S.O 6.1 4.6 4.5 2.9 2.8 MIN 318

CAL VR 1967 TOTAL 4,882 .8 MEAN 13.4 MAX 101 MIN 4.5 AC-FT 9,690 NTR YR 1968 TOTAL 1.931 .5 MEAN 5.28 MAX 37 HIN 2.2 AC-FT 3,830 SANTA ANA RIVER BASIN

11073470 CUCAMONGA CREEK NEAR UPLAND, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY JUN

1 2.8 3.0 5.3 3.3 71 115 55 29 22 15 10 9.9 2 3.0 2.B 5.5 2.8 61 103 54 28 22 15 10 10 3 3.1 3.C 21 14 10 10 4 "2778 21 14 10 10 5 2.9 4.4 3.4 2.3 54 87 51 21 14 10 9.8

7 2.9 4.1 3.1 4.3 74 74 50 27 20 1,4 10 10 8 3.2 3.7 3.2 3.9 64 69 48 27 20 13 10 9.9 9 3.2 3.1 3.3 3.5 57 65 47 26 20 13 10 9.4 10 3.0 2.5 2.9 3.6 51 64 46 26 20 13 10 9.2 11 3.1 2.7 2.9 3.1 49 59 45 26 19 13 10 9.2 12 2.9 3.1 2.7 2.3 47 55 46 26 19 13 11 9.2 14 2.7 3.C 2.5 15 42 53 44 25 18 13 11 9.8 1$ 2.9 5.1 2.4 5.6 49 40 44 25 18 12 11 10

16 2.2 3.4 2.3 3.0 46 50 42 25 18 12 10 10 17 1.9 2.3 2.3 2.6 42 49 41 25 18 12 9.1 10 19 2.4 1.9 2.4 19 43 54 39 24 17 11 9. 9.6

21 2.7 1.3 2.6 304 40 59 36 24 17 11 8. 10 22 2.6 l.l 2.7 295 42 55 35 24 17 11 8. 10 23 2.3 1.1 2.7 78 11 8. 10 25 2.1 16 11 8. 10 26 1.9 1.1 7.6 2.040 501 49 31 24 16 11 8. 10 27 1.6 1.1 4.9 327 262 48 30 24 15 10 8. 9.9 28 2.0 .54 1.1 154 138 49 30 23 15 10 8. 9.9

TOTAL 79.7 73.28 100.4 9.92 MAX 3.2 5.1 7.6 4,050 1.410 115 56 29 / 22 15 1 1C RIN 1.6 .45 1.1 2.2 40 40 29 22 15 10 8. 9.2

NOTE. ND GAGE-HEIGHT RECORD MAY 6 TO AUG. 5.

DISCHARGE. IN CUBIC FEET PER SECOND. MATED YEAH OCTOBER 1969 TO SEPTEMBER 1970

1 1C 6.2 4.6 5.6 4.9 65 11 7.8 3.2 2.4 1.9 1.3 2 10 5.5 4.6 5.6 4.8 47 10 7.5 2.9 2.4 1.9 1.4 3 1C 5 10

6 9.6 10 V 5.6 4.4 22 8.4 7.0 3.0 2.3 1.6 .8 9.6- 14 5.1 5.6 4.3 20 8.4 7.3 3.1 2.5 1.4 .7 8 9.6 8.2 5.1 5.4 4.8 19 8.4 7.2 3.1 2.6 1.4 .7 9 9.2 7.2 5.1 5.2 5.1 19 8.2 7.0 3.1 3.0 1.4 .7 10 9.2 7.1 5.1 9.3 16 17 B.O 7.0 3.2 2.9 1.5 .7 11 9.2 6.7 5.1 8.1 17 16 7.B 7.0 3.3 3.1 1.4 .8 12 9.2 6.4 5.1 8.1 9.9 15 7.6 7.2 3.4 2.9 1.6 .8 13 8.8 14 9.8 15 8.8 6.3 4.9 7.0 8.3 12 7.2 5.6 3.6 2.7 1.4 .7

16 8.8 6.6 4.9 11 17 8.8 5.8 18 8.6 5.3 4.5 8.2 6.2 12 7.0 5.1 4.0 2.5 1.5 1.7 19 B.8 5.1 20

21 8.8 4.7 4.1 6.6 5.6 11 8.7 5.1 2.2 2.6 1.5 1.7 23 8.4 4.4 4.1 6.3 5.1 10 B.7 4.1 1.8 2.6 1.3 1.6 24 8.4 4.4 4.1 6.3 5.1 10 8.0 4.0 1.8 2.5 1.2 1.6 25 8.4 4.4 4.2 6.0 5.1 10 7.5 4.0 l.B 2.4 1.1 1.6

26 8.2 4.2 5.0 5.3 5.1 10 7.7 4.1 1.9 2.4 1.2 1.6 28 7.0 4.4 5.9 5.1 40 10 8.S 4.5 2.3 2.0 1.7 1.6 30 6.6 4.6 5.6 5.1 12 7.8 4.0 3.0 2.3 1.5 1.6

TOTAL 271.7 175. 1 149.9 202.1 220.8 529 246.7 177.1 86.6 78.0 47.2 49.4 MEAN 8.76 5.84 4.84 6.52 7.89 17.1 8.22 5.71 2.89 2.52 1.52 1.65 MAX 11 14 5.9 11 40 65 11 7.8 4.0 3.1 1.9 1.8

NOTE . ND GAGE -HEIGHT RECORD FEB. 25 TO MAR. 1. SANTA ANA RIVER BASIN

11073495 CUCAMONGA CREEK NEAR HIRA LOMA, CALIF. LOCATION. --Lat 33°58'58", long 117°35'55", in sec. 22, T.2 S. , R.7 W., San Bernardino County, on left levee 200 ft upstream from Merrill Avenue and 4.6 iles west of Mira Loma. DRAINAGE AREA. --75. 8 sq mi. PERIOD OF RECORD. --January 1968 t 1970. GAGE. --Water-stage recorder. Dat Qf gage s 655.3 ft above mean sea level. EXTREMES .- -Maximums and mlnimums (discharge in cubic feet pi Annual maximum discharge (*) and peak discharges abov< (80 cfs), January 1968 to September 1970 Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Mar. 8, 1968. 0700 *920 3.28 Jan. 25, 1969 *9,100 7.08 Mar. 4, 1970 2300 *77 1.60 Feb. 6, 1969 - Jan. 22, 1969 1430 1,080 3.48 Feb. 25, 1969 1,280 2.72 No flo w for long periods in each year. 9,100 cfs Jan. 25, 1969 (gage height, 7. 08 ft, from fl oodmark), on

REMARKS.--Records poor. No gage-height record Dec. 19, 1968, to May 21, 1969. Flood flows not materially affected by percolation basins in headwater areas. Extensive ground-water withdrawals for municipal supply and irrigation. See schematic diagram of Santa Ana River basin elsewhere" in this report. Water-quality records for the water years 1968-70 are published in reports of the Geological Survey.

DISCHARGE, IN CUBIC FEET PER SECOND, JANUARY TO SEPTEMBER 1968

DEC

31

TOTAL 116 MEAN J.T* MX 116 KIN AC-FT SANTA ANA RIVER BASIN

11073495 CUCAMONGA CREEK NEAR MIRA LOMA, CALIF.--CONTINUED

NOV JUL 0 0 5.0 10 1.8 0 0 0 0 4.0 7.0 1.2 0 0 0 0 3.0 6.2 1.0 .10 0 0 0 2.0 S.8 7.0 .20 .C4 0 0 1.0 5.4 8.0 .20 .17 0 0 10 5.1 11 .20 .01 0 0 5.0 4.9 12 .29 0 0 0 2.0 4.6 12 .20 0 0 0 1.0 4.3 13 .10 0 0 0 .50 4.1 13 0 0 0 0 .30 3.9 14 0 0 0 0 .20 3.8 IS 0 0 0 0 .20 3.7 17 0 0 0 .10 .20 3.6 18 0 0 0 2.5 .20 3.8 20 0 0 0 1.0 .20 4.4 20 0 0 0 .10 .20 5.2 19 0 0 0 .05 .20 6.6 18 0 0 0 .01 .20 9.0 18 0 0 0 10 .20 15 18 0 C 0 so .20 20 17 '.01 0 0 40C 10 20 16 .01 0 0 5.C 30 19 16 .08 0 0 45 ISO IB 16 .04 0 0 2, 600 460 16 IS .OS C 0 1, 300 too 12 IS .08 0 0 100 50 8.5 14 .15 0 0 50 25 6.0 13 .04 0 2.0 25 ____ 4.5 12 .12 0 0 15 3.1 1.0 .05 0 0 8.0 ------2.5 ------0

TOTAL 0 0 2.0 4, 611.76 860.80 246.0 392.0 1.92 .22 0 MEAN 0 0 .065 149 30.7 7.94 13.1 .062 .007 0 MAX 0 0 2.0 2.600 460 20 20 .29 .17 0 MIN 0 0 0 0 .20 2.5 1.0 0 0 0 AC-FT 0 0 4.0 9, ISO 1.710 488 778 3.8 .4 0

WTR YR 1969 TOTAL 6.114.70 MEAN 16.8 MAX 2.600 MIN 0 AC-FT 12.130

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 NOV DEC JAN FEB MAR APR MAY JUN JUL

7.0 12 6.0

14 0 0 0 .03 0 IS 0 0 0 0 0

16 0 3.2 0 .01 0 17 0 .48 0 .03 0 18 0 .08 0 .06 0 19 0 .03 0 .21 0 20 0 .01 0 .28 .52

21 0 .02 0 .18 .07 22 0 .03 0 .42 .08 23 0 .OS 0 .42 .04 24 0 .IB 0 .24 .02 25 0 .21 0 .07 .06

26 0 .32 0 .06 .12 2T 0 .42 0 .07 .07 28 0 .28 2.8 .07 .03 29 0 .10 » ___ .06 0 30 0 .24 _ .03 0 31 .23 .32

TOT At 0 .58 0 5.88 6.44 62. 6T 1.89 MEAN 0 .019 0 .19 .23 2.02 .063 MAX 0 .58 0 3.2 2.9 19 .52 HIN 000 0 0 0 0 AC-FT 0 1.2 0 12 13 124 3.8

HIN o AC-FT 12.130 WTR YR 1970 TOTAL 77.46 MEAN .21 MAX 19 M1N 0 AC-FT 154 SANTA ANA RIVER BASIN 253

11074000 SANTA ANA RIVER BELOW PRADO DAM, CALIF. LOCATION.--33°53'00", long 117 0 38'40", in La Sierra Grant, Riverside County, on left bank of outlet channel, 2,500 ft downstream from axis of Prado Dam and 4.S miles west of Corona. DRAINAGE AREA.--1,490 sq mi (revised), not including 768 sq mi above Lake Elsinore. PERIOD OF RECORD.--May 1930 to November 1939 (irrigation seasons only), March 1940 to September 1970. Published as "at Santa Fe Railroad Bridge, near Prado" May 1930 to November 1931, as "at Atchison, Topeka, and Santa Fe Railroad bridge, near Prado" May 1932 to November 1939, and as "below Prado Dam, near Prado" March 1940 to September 1950. GAGE.--Water-stage recorder. Concrete control since August 1944. Datum of gage is approximately 449 ft above mean sea level (Corps of Engineers Survey). Prior to Mar. 18, 1940, at about present site at various datums. EXTREMES.--Maximums and minimum: (discharge in cubic feet per second, gage height in feet) for the water years 1966-70 are contained in the following table: Minimum daily Wtr yr Date Discharge G.H. Date Discharge 1966 Dec. 30, 1965 1,240- 4.16 Oct. 14 , 1965 16 1967 Dec. 9, 1966 1,130 4.28 July 31 , 1967 IS 1968 Mar. 8, 1968 968 4.16 Aug. 26 , 1968 16 1969 Jan. 26, 1969 5,800 5.75 Oct. 17 , 1968 20 1970 May 8, 1970 198 2.89 Sept .26 , 1970 17 Period of record: Maximum discharge, 5,800 cfs Jan. 26, 1969 (gage h eight, 5.75 ft); minimum daily, 12 cfs for some days in 1960. Flood of Mar. 2. 1938. 100. REMARKS.--Records good. Flow regulated since 1941 by Prado Reservoir (capacity, 201,200 acre-ft, revised) and Big Bear Lake (see station 11049000). Natural streamflow affected by extensive ground-water withdrawals, diversion for irrigation, and return flow from irrigated areas. Santa Ana River Development Co. pumps water from wells in Prado Reservoir into conduit which passes through dam and is released to river immediately below gage. No water pumped in water years 1968-70. See schematic diagram of Santa Ana River basin elsewhere in this report. Water-quality records for the water years 1968-70 are published in reports of the Geological Survey. COOPERATION.--Ninety-six discharge measurements and records of bypass flow furnished by Orange County Flood Con­ trol District.

DISCHARGE, IN CUBIC FEET PER SECOND, SEPTEMBER 1966

NOV DEC JAN FEB JUN JUL

,160 904 ,060 640 970 780 610 640 334

326 til 306 101

203 113 155 121 27 115 27|

241 197 146 109

109 216 681

261 67 ,160 31 ,220

TOTAL MEAN MAX 56 MIN 43 AC-FT 2,960 1,630 (t) 2,960 1,630

67,820 t 69,480

t COMBINED DISCHARGE, IN ACRE-FEET, OF RIVER AND MATER PUMPED FROM WELLS IN PRADO RESERVOIR. SANTA ANA RIVER BASIN

11074000 SANTA ANA RIVER BELOW PRADO DAM, CALIF.--CONTINUED

z 17 32 50 62 70 62 18B 63 44 34 17 23 4 22 30 658 65 62 68 78 53 41 34 20 23

6 34 32 926 67 60 62 72 53 44 35 25 26 7 45 44 11C 62 58 60 67 50 45 35 20 27 8 35 166 110 60 58 60 77 50 48 31 30 27 9 28 1C! 40 62 110

11 44 49 110 60 65 85 25 12 37 48 080 60 65 BO 13 34 48 040 56 65 131 73 44 53 22 21 27 18 30 15 65 31 49 27 21 31

16 30 48 970 60 68 70 60 37 46 26 18 30 17 55 41 45 25 20 28 18 31 19 28 46 926 20 31 46 904 53 62 63

21 25 38 22 23 38 21 8 35 24 38 22 4 35 25 36 45 679 830 65 58 91 52 37 21 7 35

26 34 45 601 800 67 58 84 52 37 20 8 38 27 34 44 80 16 7 35 37 29 3C 34 45 72 85 55 60 44 35 17 23 38

811 753 912 MAX 38 44 40 KIN 17 30 49 53 58 55 55 30 35 15 16 22 1,610 It 490 1,810 Ct) 1,810

t COMBINED DISCHARGE, IN ACRE-FEET, OF RIVER AND WATER PUMPED FROM HELLS IN PRADO RESERVOIR.

MEAN MAX MIN SANTA ANA RIVER BASIN

11074000 SANTA ANA RIVER BELOW PRADO DAM, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

NOV DEC JAN FEB MAR APR MAY JUN JUL 25 31

297 72 58 148 31 29 42 46 46 2,780 4,680 ,090 415 70 55 97 26

27

31 31 27 333 72 63 39 31 33 48 58 56 2,860 1,270 ,020 315 68 61 31 27

84 38 39 64 38 52

29 339 66 143 35 4'652 20 31 21 870 384 98 159 39 48 48

35 50 72 850 871 1,190 466 270 102 156 33 46 35 48 70 882 860 1,190 466 327

300 260 102 156 31 33

108 156 112 159 102 156

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

DAY DCT NOV DEC JUN JUL AUG SEP

1 42 52 61 66 71 108 130 161 57 31 28 24 3 44 52 71 66 76 111 132 151 52 33 31 30

5 3 52 70 63 83 143 136 130 57 30 33 25 6 S 60 70 66 87 148 116 94 54 30 28 25 7 2 121 71 60 82 146 100 77 54 30 28 24 8 1 136 76 70 80 143 98 63 54 31 27 24 9 4 159 99 64 85 143 too 52 54 28 27 25

11 52 27 31 28 12 28 13 36 78 61 121 54 138 91 54 48 25 30 28 42 70 61 96 51 138 91 52 47 30 27 15 46 75 66 123 54 138 89 46 47 41 28 28

16 50 73 64 123 51 136 89 31 47 35 28 28 17 55 64 61 128 51 136 89 33 52 39 27 30 18 56 54 58 123 46 136 89 53 47 43 27 31 19 52 52 58 151 17 136 B9 52 47 39 28 31

21 48 55 63 130 10C 136 89 1 43 37 31 31 22 50 56 64 96 98 136 91 0 41 39 35 31 23 4B 54 71 98 94 136 92 1 41 33 30 22 24 50 48 76 87 92 136 94 1 41 33 27 24 25 SB 52 78 83 91 136 98 4 37 39 30 24 26 63 55 76 85 90 136 100 55 31 37 25 17 27 63 55 71 85 85 134 118 60 33 39 27 21 29 56 50 61 66 ______132 170 63 36 2B 22 25 30 52 54 68 75 132 167 60 37 28 20 25

HE AN 47.4 74.1 6B.1 94.0 107 135 108 71.6 46.6 33.2 28.4 26.4 HAX 64 159 99 161 154 148 170 161 57 43 35 31 HIN 30 48 SB 60 66 100 89 31 31 25 20 17

CAL YR 1969 TOTAL 190.604 HEAN 522 HAX 5,700 HIN 26 AC-FT 378,100 256 SANTA ANA RIVER BASIN

11075720 CARBON CREEK BELOW CARBON CANYON DAM, CALIF. LOCATION.--Lat 33°54'40" (revised) , long 117°50'29", in SWWt sec.17, T.3 S., R.9 W., Orange County, on right wall of outlet channel, 250 ft downstream from toe of Carbon Canyon Dam and 2.4 miles northwest of Yorba Linda. DRAINAGE AREA.--19.S sq mi. PERIOD OF RECORD.--October 1961 to September 1970. GAGE.--Water-stage recorder. Datum of gage is 398.29 ft above mean sea level (Corps of Engineers bench mark). AVERAGE DISCHARGE.--9 years, 0.725 cfs (525 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water years 1966-70 are contained in the following table:

Wtr yr Date Discharge Date Discharge 1966 Dec. 1 1965 220 Most of time 1967 Dec. 6 1966 114 do. 1968 Nov. 20 1967 77 .82 do. 1969 Feb. 25 1969 446 2.64 do. 1970 Mar. 3 1970 15 .46 do. Period of record: Maximum discharge, 446 cfs Feb. 25, 1969 (gage height, 2.64 ft), from rating curve extended above 110 cfs on basis of computation of flow in concrete-lined channel at gage height 4.18 ft; no flow for most of time in each year. REMARKS.--Records good. Discharge Mar. 4 to Apr. 3, 1969, determined from flow through dam. Flow regulated by Carbon Canyon flood-control reservoir (capacity, 6,610 acre-ft, revised). No diversion above station. See

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1970 NOV. 14, 1965.. APR. 22, 1967.... DEC. 26, 1968.... FEB. 25, 1969.... 166 .20 JAN. 14, 1969.... .20 ...... 143 .20 ...... 151 ...... 133 ...... 133 ...... 44 ...... 5.0 ...... 5.0 ...... 5.0 ...... 5.0 ...... 5.0 ...... 5.0 ...... 5.0 ...... 5.0 ...... 5.0 ...... 5.0 3, 1966.... 32 ...... 5.0 ...... 5.0 ...... 5.0 ...... 5.0 ...... 5.0 ...... 3.1 ...... 4.6 ...... 45 1970.... .01 ...... 10 1, 1968.... 1.4 FEB. 16. 28. MAR. 1. 25, 1967.... 40 10 7.4 .70 18 15...... 2.5 22. 20...... 3.6 16...... 20 23. 21...... 90 DEC. 25...... 10 24. MONTH CFS DAY;

NOVEMBER 1965...... 7.80 DECEMBER...... 38.20 CAL YR 1965...... ;...... 77.20 JANUARY 1966...... 32.10 MARCH...... 10 WTR YR 1966...... 88.10 NOVEMBER 1966...... 14.90 DECEMBER...... 197.30 CAL YR 1966...... 254.30 JANUARY 1967...... 40 APRIL...... 25.90 WTR YR 1967...... 278.10 NOVEMBER 1967...... 56.20 1.87 DECEMBER...... 24.20 .78 CAL YR 1967...... 146.30 .40

FEBRUARY 1968...... 1.50 .052 3.0 MARCH...... 70.20 2.26 139 WTR YR 1968...... 152.10 .42 302 DECEMBER 1968...... 20 CAL YR 1968...... 71.90 .20 JANUARY 1969...... 417.90 179 13.5 829 FEBRUARY...... 856.60 219 30.6 1,700 MARCH...... 385.0 133 12.4 764 APRIL...... 8.15 .27 WTR YR 1969...... 1,667.85 4.57 CAL YR 1969...... 1,667.65 4.57 JANUARY 1970...... 14 .10 FEBRUARY...... 03 .02 MARCH...... 4.53 2.2 WTR YR 1970...... I ...... 4.70 SANTA ANA RIVER BASIN

11075800 SANTIAGO CREEK AT MODJESKA, CALIF. LOCATION.--Lat 33°42'32", long 117»38'05", in SE>sSEWs sec.29, T.5 S. , R. 7 W. , Orange County, on right bank at Santiago Canyon road bridge, 0.3 mile west of Modjeska and 0.4 mile downstream from Karding Creek. DRAINAGE AREA.--12.5 sq mi. PERIOD OF RECORD.--October 1961 to September 1970. GAGE.--Water-stage recorder. Datum of gage is 1,254.35 ft above mean sea level. Prior to Sept. 10, 1969, at datum 4.42 ft higher. AVERAGE DISCHARGE.--9 years, 8.70 cfs (6,300 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (100 cfs), water years 1966-70 Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 22, 1965 2100 "1,500 6.60 Jan. 24, 1967 1700 270 3.30 . 25, 1969 1200 2,750 6.93 Dec. 29, 1965 1800 1,180 5.80 Feb. 6, 1969 0830 752 2.46 Mar. 8, 1968 0830 *211 2.93 Feb. 25, 1969 1545 *6,520 6.18 Dec. 3, 1966 1230 394 Dec. 6, 1966 1930 *1,420 Jan. 21, 1969 0930 1,810 3.27 Mar. 2, 1970 0800 *90 a3.ll a Present datum. inimum daily discharge, water years 1966-70 Wtr yr Date Discharge Wtr yr Date Discharge 1966 Long periods 1969 Long periods 0 1967 do. 1970 Aug. 10 to Sept. 30, 1970 .01 1968 do. Period of record: Maximum discharge, 6,520 cfs Feb. 25, 1969 (gage height, 10.60 ft, present datum), from rating curve extended above 840 cfs on basis of slope-area measurement of peak flow; no flow for several months in each year. REMARKS.--Records fair. No gage-height record Mar. 1 to Sept. 30, 1969. Slight regulation by Modjeska Reser­ voir on Harding Creek. No diversion above station. See schematic diagram of Santa Ana River basin elsewhere in this report. COOPERATION.--F

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1466

1 0 1* 35 .5 .50 2 0 12 24 .2 .50 3 0 11 IB .5 .50 4 0 10 14 .3 .50 5 0 9.2 11 .1 .60

6 0 .1 10 .6 .60 7 0 .7 9.8 1 .50 8 0 .1 9.6 .4 .60 9 0 .7 B.B 1 .60 10 0 1 8.4 .B .50

11 0 11 7.4 .6 .50 12 0 10 7.4 .3 .40 13 0 10 7.4 .1 .40 14 0 11 7.4 .7 .40 15 0 10 7.4 4 0 .40 16 0 11 7.4 1 0 .40 17 0 11 7.4 .8 .30 18 .20 11 8.5 .6 .30 19 .50 11 7.7 .6 .30 20 .40 10 7.7 .3 .30

21 .40 9.6 7.1 .7 .80 .20 22 417 9.0 7.1 .5 .70 .20 23 308 B.I 6.7 .5 .50 .20 24 74 7.7 6.4 .2 .50 .20 25 70 7.4 6.1 .2 .10 26 45 6.7 5.B .2 27 31 6.4 5.6 .0 2B 22 6.1 5.0 .7 .50 29 19 292 4.5 .50 30 16 169 6.9 .50 31 ...... 61 5.6 - - .50

TOTAL 0 1,003.50 786.8 291.1 150.0 9 4 0 36.10 10.20 MEAN 0 33.5 25.4 9.39 5.36 3 } 4 1.16 .34 MAX 0 417 292 35 10 1.9 1.9 .60 HIN 0 0 6.1 4.5 3.1 .90 .50 37 BO 72

WTR YR 1966 TOTAL 2,412 SANTA ANA RIVER BASIN

11075800 SANTIAGO CREEK AT MODJESKA, CALIF.--CONTINUED

DAV OCT MOV DEC JAN FEB MAR APR MAV JUN JUL AUG SEP

1 8.7 21 6.6 7.0 22 6.6 3.6 .70 .14 2 8.1 19 6.5 11 20 >.5 3.5 .66 .15 3 22 .8 18 6.7 7.7 19 >.4 3.4 .59 .15 4 16 .6 17 8.1 8.3 18 >.3 3.3 .58 .14 > 7C .4 16 7.1 10 17 5.0 3.0 .5C .16

6 1,060 .1 14 6.5 8.9 16 5.1 2.8 .46 .13 7 265 .& 14 6.1 9.1 15 .8 2.7 .43 .17 8 115 .8 13 5.8 9.1 14 .1 2.4 .48 0 5 78 .5 12 5.6 B.5 14 .3 2.2 .47 0 i; 58 .9 12 5.7 8.3 14 .8 2.0 .45 0

H 45 .8 11 6.7 26 13 .8 1.9 .41 0 12 35 .8 10 7.1 26 13 .4 2.2 .36 0 13 ?9 .6 10 22 24 12 .0 3.1 .35 3 14 26 .5 10 23 23 11 .8 3.1 .35 0 li 24 .4 9.4 15 21 11 .3 3.0 .28 5

16 20 .4 8.9 12 19 10 .8 2.8 .27 0 17 17 .3 8.3 10 18 9.6 .8 2.9 .24 0 1 3 15 19 10 .1 2.8 .24 0 19 13 .2 7.7 8.6 25 9.8 .7 2.5 .24 2; 12 .1 7.? 26 .5 2.4

21 12 '" 6.7 7.5 26 22 11 6 6.5 6.9 41 6.9 4.0 2.1 .20 0 23 11 28 6.3 5.6 38 6.6 >.l 1.8 .19 J 24 11 114 6.1 5.3 36 6.6 ' .0 1.6 .19 c 25 10 85 6.3 5.1 32 6.7 3.8 1.3 .17 "

26 10 67 7.3 4.6 29 6.6 3.8 1.1 .17 .03 27 7.5 56 7.0 4.3 27 6.7 .7 .97 . 5 .06 28 9.2 6 6.9 4.1 26 7.4 3.9 1.0 . 5 .13 29 9.1 9 4.2 24 . 9 .18 3: 3.5 23 7.4 ' .0 .74 . 3 .21 31 6.2 7.7 .72 . 2

TOTAL 10.15 1.55 MEAN .33 .052 MAX a o i,06: 114 21 23 41 22 7.0 3.6 .70 .21 MIN .12 3 AC-FT 3.1

DAY OCT NOV DEC JAN FEB MAR APR M«Y JUN JUL AUG SEP

.21 3.5 .2 2.5 1.3 2.7 1.2 63 .02 .19 2.8 .2 2.1 1.2 6.1 1.2 54 0 .19 2.5 .2 2.0 1.2 4.3 1.3 47 0 .19 2.1 .2 1.8 1.1 3.5 1.4 52 0 .15 1.8 .2 1.7 1.0 3.0 1.4 46 0

.11 1.4 .3 1.5 .97 3.0 1.4 45 0 .1C 1.3 1.4 46 0 .09 1.5 .5 1.3 59 2.5 1.4 41 0 .09 1.2 .6 1.3 21 2.2 1.4 34 0 1 .09 1.0 .6 1.5 12 ?.5 1.3 45 0

1 .08 .99 ., 1.3 8.3 2.5 1.3 51 0 1 .06 .93 .6 1.3 7.0 2.4 1.5 52 0 13 .06 .94 .7 1.4 14 .05 .90 .6 1.5 5.7 2.4 1.8 49 0 15 .05 .8ft .5 1.4 4.9 2.0 1.5 44 0

16 .04 .91 .5 1.3 4.4 2.0 1.3 40 0 17 .04 .02 1.1 .4 1.3 4.2 2.? l.l 37 0 18 .03 .04 5.6 .5 1.3 3.9 2.0 1.1 30 0 19 .01 .1 9.7 .6 1.1 3.6 1.8 1.1 28 0 20 .01 .3 8.2 .5 1.1 3.2 1.7 .97 23 0

21 .03 .8 6.6 .5 1.1 3.0 1.7 1.0 18 0 22 .03 .9 5.5 .4 1.2 2.9 1.6 1.0 14 0 23 .03 .2 5.0 .4 l.l 2.7 1.5 1.1 12 0 24 .03 .8 4.5 .4 1.2 2.6 1.5 1.2 12 0 25 .03 .5 3.5 .4 1.2 2.5 1.3 1.1 09 0

26 .04 .4 2.7 .4 1.3 2.5 1.4 1.0 07 0 27 .03 .3 2.5 .8 1.3 2.5 1.7 .92 06 0 28 .03 .3 2.2 .8 1.4 2.4 1.6 .B2 05 0 29 .01 .1 1.9 .3 1.3 2.4 1.5 .87 04 0 30 .01 .6 1.6 2 2.3 1.3 .78 03 0 31 .01 1.1 ., 2.2 .72 0

67 .02 0 MEAN .068 .8 2.80 1.6B 1.42 5.79 2.31 1.21 32 .0006 0 MAX .21 4. 9.7 3.6 2.5 59 6.1 1.8 63 .02 0 MIN .01 .88 1.2 1.1 .97 1.3 .72 03 0 0 AC-FT 4.2 5 172 103 82 356 137 74 19 .04 0 SANTA ANA RIVER BASIN

11075800 SANTIAGO CREEK AT MODJESKA, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET DAY OCT JUN JUL sue SEP

1 0 24 15C 25 11 6.3 3.9 1.3 .48 2 0 30 IOC 25 11 6.2 3.B 1.2 .47 3 0 27 93 25 11 6.1 3.6 1.2 .46 4 0 30 B7 25 11 6.C 3.5 1.1 .45 5 0 29 BO 25 10 5.9 3.4 1.1 .43 6 0 218 75 24 10 5.8 3.3 1.1 .41 7 C 151 71 24 10 5.7 3.1 1.0 .40 0 3.0 l.C .4U 9 0 64 63 21 9.7 5.5 2.9 .97 .40 10 C 20 11 6C 56 IB 9.4 5.3 2.7 .90 .38 12 9 48 53 17 9.2 5.2 2.6 .Kb .38 13 .10 45 51 15 9.1 5.2 2.5 .85 .38 14 4.C 34 49 14 9.0 5.1 2.4 .83 .38 15 3.7 33 4B 13 8.7 5.0 2.3 .80 .38

16 2.1 30 46 13 8.6 4.9 2.2 .78 .37 17 1.5 22 45 13 B.4 4.9 2.1 .76 .37 18 1.3 32 43 13 8.2 4.8 2.0 .73 .17 19 3.1 37 42 13 B.O 4.7 1.9 .71 .37 20 25 4C 40 13 7.9 4.6 1.8 .69 .37 21 573 36 39 13 7.B 4.5 l.B .67 .37 22 133 47 37 12 7.7 4.5 1.7 .65 .37 23 7C 821 35 12 7.6 4.4 1.7 .63 .38 24 25

26 743 837 31 12 7.1 4.2 1.5 .58 .41.1 27 330 569 29 12 7.0 4.1 1.5 .56 .41 28 166 271 28 11 6.B 4.0 1.5 .54 .42 29 129 27 11 6.7 4.0 1.4 .53 .43 3C 57 ______26 11 6.6 4.C 1.4 .52 .45 31 17 26 6.4 1.3 .50 TOTAL C MEAN 0 .Bl .40 MAX 0 6.3 3.9 1.3 .48 WIN C C 0 0 2? 26 11 6.4 4.0 1.3 .5J .37 AC-FT C 144 5C 24

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969-TO SEPTEMBER 1970

DAY OCT 40V DEC

1 .60 .86 1.0 1.1 35 1.1 .66 .14 .02 .Ll 2 .50 . 8 1.0 1.1 53 1.1 3 .50 . 8 l.C 1.3 19 1.0 .55 .12 .02 .01 4 .55 . 8 l.C 1.3 18 .96 .55 .11 .02 .01 5 .59 . 8 1.0 1.3 44 .91 .50 .10 .02 .Cl 6 .28 . 8 l.C 1.3 19 .95 .50 .09 .02 .01 7 .31 . 8 .88 1.2 13 1.1 .55 .08 .02 .1.1 8 .29 . 9 .88 1.1 10 .99 .55 .07 .02 .01 9 .31 .88 .89 1.1 7.9 .92 .55 .06 .02 .01 10 .33 .88 l.l 3.6 7.3 .86 .55 .06 .01 .Cl 11 .49 .88 1.3 5.9 6.1 .86 .52 .05 .1)1 .Cl 12 .78 .88 1.3 3.7 5.3 .94 .50 .35 .01 .Cl 13 .79 .8.8 1.5 3.5 4.4 .86 .48 .05 .01 .01 14 .81 .88 1.5 3.0 3.9 .86 .45 .04 .01 .01 15 .88 .BB 1.6 3.0 3.6 .79 .43 .04 .01 .01 16 .9C .88 2.6 2.8 3.0 .79 .40 .04 .Dl .01 17 .1 .88 3.4 2.7 2.8 .86 .38 .04 .01 .n 18 .1 88 .88 2.4 2.4 2.7 .86 .36 .03 .01 .01 19 .4 B8 .88 2.0 2.3 2.6 .86 .34 .03 .01 .Cl 20 .5 B8 .88 1.9 2.2 2.4 .86 .32 .03 .01 .01 21 .6 88 .88 1.9 2.0 2.2 .79 .30 .03 .01 .01 22 .7 B8 .88 1.9 2.3 2.0 .79 .28 .03 .01 .01 23 .7 88 .88 1.8 2.2 1.6 .79 .26 .02 .01 .01 24 .9 88 .88 1.6 1.8 2.C .72 .24 .02 .01 .Cl 25 .0 BB .88 1.6 2.1 2.0 .66 .22 .02 .01 .il 26 .7 BB .88 1.6 2.2 1.8 .86 .20 .02 .01 .01 27 .6 84 .88 1.5 2.3 1.7 1.0 .19 .02 .01 .01 2B .7 78 .72 1.3 7.0 1.7 .94 .18 .02 .01 .01 29 .0 78 .98 1.3 1.6 .86 .17 .02 .01 .01 30 .7 78 1.1 1.3 1.6 .72 .15 .02 .01 .01 . 1 1.1 1.2 1.5 .72 - .02 .01

.052' .40 .30 MEAN .40 .013 .010 MAX 2.1 9.0 1.1 3.4 7.0 53 1.1 .66 .14 .02 .01 MIN .28 78 .72 .88 1.1 1.5 .66 .15 .02 .01 01. AC-FT 67 BO 53 92 134 561 t 54 24 3.2 .8 .6 MIN 0 C^FT 38.510 MIN .01 C-FT 1,150 260 SANTA ANA RIVER BASIN 11076000 SANTIAGO CREEK AT SANTIAGO DAM, NEAR VILLA PARK, CALIF. LOCATION.--Lat 33°47'10", long 117°43'33", near west corner of lot 70 of Lomas de Santiago Grant, Orange County, on upstream face near left end of Santiago Dam, 0.3 mile upstream from Fremont Canyon and 5.7 miles southeast of Villa Park. DRAINAGE AREA.--63.1 sq mi. PERIOD OF RECORD.--October 1931 to September I960, October 1961 to September 1970 (discontinued). GAGE.--Nonrecording gage. Datum of gage is at mean sea level. AVERAGE DISCHARGE.--38 years, 18.3 cfs (13.ZZO acre-ft per year); median of yearly mean discharges, 10 cfs (7,500 acre-ft per year). REMARKS.--Records of total inflow represent all water reaching Santiago Reservoir, including precipitation on the reservoir and supplemental Colorado River water delivered through aqueduct of Metropolitan Water District of Southern California. Total inflow computed on basis of records of storage, release (draft), spill, leakage, and evaporation. Monthly evaporation from lake surface computed on basis of evaporation from class A pan using coefficient of 0.80. Records of net inflow exclude supplemental water from Colorado River. Dam was completed in December 1931. Area and capacity tables for the reservoir are dated December 1930. Capacity of voir at spillway level (gage height, 790.0 ft), ZS.OOO acre-ft. At times flashboards installed on spill- s in basin above th is reservoir. See schematic diagram of Santa Ana River basin elsewhere in this report, COOPERATION. --Res ervoir operation records and related data furnished by Serrano and Carpenter Irrigation Dis- tricts and Irv ine Co. Spill, in acre- feet, furnished by Orange County Flood Control District. REVISIONS (WATER YEARS). --WSP 11Z1: 1932-36, 1938 (flood data). WSP 19Z8: Drainage area.

MONTHLY NET INFLOW, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1970 MONTH NET TION (ACRE- IN (ACRE- RATION WASTE, INFLOW RIVER INFLOW

(ACRE- FEET) LEAKAGE FEET) IMPORTED FEET) SANTIAGO RESERVOIR FEET) (ACRE- (ACRE- FEET) FEET! 4,160 2, 061 157 0 945 659 266 6,940 +2,760 734 64 0 3,556 0 3 556 10,233 +3,293 6 60 0 3,379 0 3 379 +5,606 21,176 1,475 0 26,457 16,955 9 502 0 2,253 0 2 253 12,464 +662 397 131 0 1,210 0 1 210 11,664 -600 1,422 158 0 960 0 960 11,643 -41 1,807 198 0 1,964 1,573 391 11,924 +61 2,419 163 0 2,663 2,196 467 762 R 11,525 -399 2,372 242 0 2,215 1,766 427 9,455 -2,070 2,426 273 0 631 93 536 AUGUST...... 751.2 7,556 -1,899 2,162 232 0 495 90 405 0 458 103 355 +427 16,343 2,001 0 20,771 6,502 14,269 4,972 -926 1,715 106 0 693 626 265 5,076 +104 767 47 0 916 796 122 17,761 +12,665 17 72 0 12,774 94 12,660 +7,526 16,021 1,925 0 27,474 7,361 20,113 21,146 +3,367 25 119 0 3,531 116 3,415 21,966 +640 637 176 0 1,655 74 1,761 22,499 +511 756 155 0 1,422 113 1,309 APRI L 24,665 +2,366 249 159 0 2,794 116 2,676 25,595 +710 652 260 0 1,622 126 1,494 24,366 -1,229 1,996 241 0 1,006 92 916 22,644 1,906 351 0 737 125 612 21,260 -1,564 1,678 357 0 651 135 516 20,007 -1,253 1,563 207 0 537 104 433 +14,107 12,363 2,252 0 28,742 2,521 26,221 16,916 -1,091 1,291 281 0 461 126 353 16,310 1,037 124 0 555 76 477 16,160 -150 479 132 0 _ 461 66 393 +399 12,691 2,564 0 15,654 1,277 14,377 136 0 366 62 324 FEBRUARY...... 16,363 -1,051 1,265 99 0 333 77 256 16,503 +140 752 164 0 1,076 64 1,012 15,401 -1,102 1,502 216 0 616 96 520 13,563 2,293 215 0 670 119 551 13,607 +44 2,460 236 0 2,760 2,216 542 13,916 +311 2,619 266 0 3,196 2,671 325 12,321 -1,597 1,736 259 0 398 123 275 10,666 -1,433 2,011 197 0 775 495 260 -9,119 16,479 2,347 0 11,707 6,399 5,306 10,500 -400 2,066 144 0 1,630 1,720 110 10,100 -400 1,26 119 0 962 698 64 ...... 756.5 9,950 -150 1,17 91 0 1,112 932 160 -8,250 20,19 2,164 0 25,000 +15,050 84 156 760 16,835 792 16 043 25,000 0 94 44,60O 44,695 0 44 695 25,000 0 208 12,000 12,214 0 12 214 27,400 +2,400 232 0 2,635 0 2 635 27,200 350 239 0 369 0 369 7OT R 26,100 1,921 167 0 1,006 0 1,008 24,300 -1,600 2,042 336 0 576 90 488 ,22,700 -1,600 1,639 366 0 625 54 571 SEPTEMBER...... 763.1 21,000 -1,700 1,840 252 0 392 53 339 63,295 4,539 76,756 OCTOBER...... 779.2 19,000 -2,000 2,304 262 0 566 63 503 17,900 -1,100 1,729 191 0 620 49 771 17,500 -400 515 108 0 223 45 178 CAL YR 1969.... +7,550 13,397 2,653 57,380 80,984 1,146 79,634 353 99 0 252 36 216 ...... 775.3 17,000 -300 707 156 0 563 30 533 17,700 +700 460 230 0 1,390 38 1,352 16,100 -1,600 2,266 230 0 696 97 799 16,300 + 200 3,526 259 0 3,987 3,251 736 17,700 +1,400 3,166 254 0 4,640 4,252 568 15,100 -2,600 2,792 295 0 467 126 361 ...... 763.6 11,900 -3,200 3,522 277 0 599 207 392 0 463 176 307 WTR YR 1970...... -11,340 23,866 2,560 0 15,106 6,370 6,736

NOTE. FOR MONTHS WHEN INFLOW TO THE RESERVOIR WAS SMALL AND OTHER OUANTITIES WERE LARGE, DISCORDANT FIGURES OF NET INFLOW MAY APPEAR. THIS ARISES PRIMARILY FROM THE DIFFICULTY OF COMPUTING NET INFLOW AS THC RESIDUAL OF SEV­ ERAL LARGER OUANTITIES, WHICH ARE NOT SUSCEPTIBLE TO MEASUREMENT WITH A PRECISION NECESSARY TO PRODUCE A FINAL ANSWER WITHIN DESIRABLE LIMITS OF ACCURACY. SANTA ANA RIVER BASIN

11077500 SANTIAGO CREEK AT SANTA ANA, CALIF. LOCATION. --Lat 33°46'13", long 117°S3'02", in NW^SlVuNWe sec.l, T.5 S. , R.10 W. , Orange County, on downstream side of Bristol Street bridge at Santa Ana, 1,600 ft upstream from mouth. Prior to Sept. 8, 1969, at site 0.1 mile upstr DRAINAGE AREA. - -95.1 sq mi. PERIOD OF RECORD. --October 1928 to September 1970. Monthly discharge only October to December 1928, published in WSP 1315-B. GAGE. --Water-stage recorder. Datum of gage is 102.34 ft above mean sea level (Orange County Flood Control Dis­ trict bench mark). Prior to Sept. 8, 1969, at site 0.1 mile upstream at different datums. AVERAGE DISCHARGE.--42 years, 5.49 cfs (3,980 acre-ft per year); median of yearly mean discharg 0.7 cfs (510 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic fee second, gage height in feet) for the water years 1966-70 are contained in the following table: Minimum Wtr yr Date Discharge G.H. Date charge 1966 Dec. 29, 1965 590 4.50 Most of time P 1967 Nov. 7, 1966 900 4.80 do. 1968 Nov. 19, 1967 610 4.15 do. 1969 Feb. 25, 1969 6,600 9.10 do. 1970 Mar. 2, 1970 1,100 5.65 do. Period of record: Maximum discharge, 6,600 cfs Feb. 25, 1969 (gage height, 9.10 ft, site and datum then in use); maximum gage height, 9.85 ft Jan. 16, 1952; no flow for most of time in each year. REMARKS.--Records fair. Flow regulated by Santiago Reservoir (see station 11076000), since January 1963 by Villi Park flood-control reservoir (capacity, 15,500 acre-ft), and affected by intervening gravel pits. Diversions above station by Irvine Co. and Serrano and Carpenter Irrigation Districts. In each winter season, some watet originally diverted from Santa Ana River by Santa Ana Valley Irrigation Co.'s canal is occasionally wasted report. COOPERATION. --Thirty-two discharge measurements furnished by Or ange County Flood Control District. REVISIONS (WATER YEARS). --WSP 1635: 1934, 1935(M), 1936. WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1968

IS...... 11 .10 ...... zb 5...... 147 4...... 20 18...... 33 ~ 17...... 4.1 . 52 11...... 5.2 19...... 18 22...... 77 7...... 2.7 18...... It . 58 1968.... .21 24...... 13 23...... 1.4 20...... 30 27...... 8.2 25...... 1.4 24...... 64 21...... 1.8 28...... 1.3 DEC. 25...... 2.4 ...... 3.7 FEB. 13...... 4.0 .40 24...... 1.0 14...... 4.1 3.0 SEPT .28... 30...... 2.5 10...... 11...... 114 JAN. 30, 1966.... 11 2.2 ...... 14 FEB. 12...... 13 ...... 60 2...... 1.9 7...... 20 . 31 NOV. 7...... 124 14...... 2.6 20...... 50 8...... 20 31...... 12 ...... 37

MONTH CFS-DAYS MAXIMUM MINIMUM MEAN RUNOFF IN ACRE-FEE! NOVEP ...... 147 .3 77 0 4. 1 292; DECEP 3ER...... 95 .8 71 0 3. 9 190 CAL YR 1965...... 428 .20 77 0 1. 7 849 ...... 11 11 0 5 22 FEBRL ...... 19 .20 19 0 9 38 WTR YR 1966...... 273 .30 77 0 5 542

.20 124 0 4. 4 246 DECEf 3ER...... 311 .80 147 0 10. 618 CAL .20 147 0 1. 8 9ZS ...... 125 .8 64 0 4. 6 Z5C MARCH .60 31 0 2. 5 132 APRIL .10 15 0 1. 4 91 SEPTE ...... 16 16 0 S3 32 WTR YR 1967...... 50 147 0 1.89 1,37C( NOVEMBER 1967...... 00 90 0 4.67 278 DECE* 3ER...... 51 .30 33 0 1. >5 102 CAL .80 90 0 1.22 884 .70 8.2 0 .31 19 FEBRL ...... e .1 4.1 0 !8 16 MARCH ...... 122 .9 114 0 3.< 6 244 APRIL ...... 15 .9 14 0 53 32 WTR YR 1968...... 347 .90 114 0 .95 690

NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. SANTA ANA RIVER BASIN

11077500 SANTIAGO CREEK AT SANTA ANA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

NOV DEC JAN FEB MAR APR MAY JUN JUL

.760 ,200 ,050 990 950

363 660 749 320 486 530 268 350 198

165 175 128 2.5

19 0 20 132 0 20 C 45 118 0

21 0 38 120 0 22 C 3.5 176 0 23 0 0 619 0 24 C 89 738 0 25 15 328 4,270 0

26 7.1 380 3,600 a 27 0 137 2.360 0 28 0 l.C 2,460 0 29 0 0 _. _ 0 30 0 0 0 31 0 ?7 ...... 0

TOTAL 0 0 22.1 1,100.38 17,239.4 7, BIO 0 MEAN 0 0 .71 35.5 616 252 0 MAX 0 3 15 380 4,270 1,760 0 MIN 0000 0 o a AC-FT C 0 44 2,180 34,190 15,490 0

MIN 0 AC-FT 354

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 1973

NOV DEC JAN FEB MAR APR HAY JUN JUL

31

TOTAL MEAN MAX MIN AC-FT SANTA ANA RIVER BASIN

11078000 SANTA ANA RIVER AT SANTA ANA, CALIF. LOCATION. --Lat 33°44 1 56" > long 117°54'30",' in NWjSHftSESj sec. 10, T.5 S. , R.10 W. , Orange County, on pier of Fifth Street bridge in Santa Ana, 1.8 miles downstream from Santiago Creek. DRAINAGE AREA. --1,689 sq mi (revised), not including 768 sq mi above Lake Elsinore. PERIOD OF RECORD. --January 1923 to September 1970. GAGE. --Water-stage recorder. Datum of gage is 71.20 ft above mean sea level (Orange County bench mark). See WSP 1928 for history of changes prior to Oct. 2, 1961. AVERAGE DISCHARGE. --17 years (1923-40), 23.4 cfs (16,940 acre-ft per year); median of yearly mean discharges, 3.1 cfs (2,200 acre-ft per year); 30 years (1940-70), 31.4 cfs (22,750 acre-ft per year); median of yearly mean discharges, 2.4 cfs (1,700 acre-ft per year). EXTREMES. --Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water years 1966-70 are contained in the following table:

Wtr yr Date Discharge G.H. Date Discharge 1966 Nov. 24, 1965 a4,300 5.77 Most of time 0 1967 Dec. 5, 1966 a5,700 5.90 do. 0 1968 Mar. 8, 1968 1,470 2.76 do. 1969 Feb. 25, 1969 19,100 6.90 do. 1970 Mar. 2, 1970 1,710 4.01

Period of record: Maximum discharge (excludes flow which bypassed gage from break in levee downstream from Imperial Highway), 46,300 cfs Mar. 3, 1938 (gage height, 10.20 ft, site and datum then in use), on basis of slope-area measurement of peak flow; no flow for several months in each year. REMARKS.--Records poor. Natural flow affected by ground-water withdrawals, diversions, importation from Metro­ politan Water District, municipal use, return flow from irrigation, Prado flood-control reservoir (capacity, 201,200 acre-ft, revised) since 1940, three small flood-control reservoirs (combined capacity, 31,900 acre-ft), Big Bear Lake (see station 11049000), and by Santiago Reservoir (see station 11076000). Discharge up to 100 cfs can be diverted from Carbon Creek to Coyote Creek, 1.5 miles above mouth of Carbon Creek,. See schematic diagram of Santa Ana River basin elsewhere in this report. COOPERATION.--Twenty-three discharge measurements furnished by Orange County Flood District. REVISIONS (WATER YEARS).--WSP 1635: 1940(M), 1-944.

DISCHARGE. IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JUN JUL

560 713 530 700 475 696 425 350

26 625 0 27 650 0 28 547 0 29 586 TO 30 564 198 L3 31 659 0

TOTAL 0 4.441.90 3.388.10 2.660 MEAN 0 1~48 109 85.8 MAX 0 650 659 713 WIN 0000 AC-FT 0 8,810 6.720 5.280

CAL YR 1965 TOTAL 8.310.50 MEAN 22.8 AC-FT 16.480 WTR YR 1966 TOTAL 10.532.00 MEAN 26.9 AC-FT 20.890 SANTA ANA RIVER BASIN

11078000 SANTA ANA RIVER AT SANTA ANA, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

DAY SEP

1 C 0 0 .30 0 39 0 2 0 0 0 .20 0 .70 0 3 0 239 0 .10 0 .20 0 4 0 0 0 .10 .10 1.1 0 5 0 883 0 0 .10 0 0

6 0 1,020 0 0 0 0 0 7 212 796 0 0 0 .10 0 8 2.8 778 0 0 0 0 0 9 0 750 0 0 C 0 0 1C 0 700 0 0 .10 0 0

11 0 650 0 0 .90 13 0 12 0 600 0 0 20 .1C 0 13 0 550 0 0 55 0 0 14 0 550 0 0 11 0 0 IS 0 600 0 0 .10 9.2 0

16 0 600 0 0 .10 0 0 17 0 612 0 0 .10 0 0 18 0 604 0 0 .10 30 0 19 0 576 0 0 .10 50 0 20 0 562 0 0 .10 .90 0

21 0 562 0 0 .10 7.5 0 22 0 548 65 0 .10 13 0 23 C 353 440 0 .10 .40 0 24 0 243 965 0 .10 4.4 0 25 0 200 679 0 .10 0 0

26 0 ISO 471 0 .10 .90 0 27 0 96 438 0 .10 4.0 0 28 0 2.0 390 0 .10 3.5 13 29 0 1.0 86 .10 0 0 30 0 0 5.0 .10 0 0 31 0 1.0 17

TOTAL 0 214.8 13.225.0 3.540.0 .70 105.80 178.00 0000 13 MEAN 0 7.16 427 114 .025 3.41 5.93 0000 .43 MAX 0 212 1.020 965 .30 55 50 0000 13 MIN 0 0 0 0 0 0 0 0 0 0 C 0 AC-FT 0 426 26.230 7.020 1.4 210 353 0 0 0 0 26

>,270

DISCHARGE, IN CUBIC FEET PER SECOND. WATER YEAR OCTOGIER 1967 TO SEPTEMBER 1968

DAY OCT NOV »'

1 .10 .10 .10 0 0 39 .10 0 2 .10 0 0 0 0 B.I .10 0 3 .10 0 0 0 0 .10 .10 0 4 .10 0 0 0 0 .10 .10 0 5 .10 0 0 0 0 .10 .10 .10

6 .10 0 0 0 0 .10 .10 .10 7 .10 0 0 0 B.O .10 .10 0 8 .20 .10 0 0 80S .10 .10 0 9 .20 0 0 .10 464 .10 .10 0 10 .10 0 0 0 426 .10 .10 0

11 .10 0 0 0 237 .10 .10 0 12 .10 0 0 0 333 .10 .10 0 13 .10 0 0 1.1 193 .10 .10 0 14 .10 0 0 14 23 .10 .10 0 15 .10 0 0 0 .30 .10 .10 0

16 .10 0 0 0 .20 .10 .10 0 17 .10 0 0 0 .10 .10 .10 0 18 .10 73 0 0 £ .10 .10 0 19 315 89 0 0 0 .10 .10 0 20 22 123 0 0 0 .10 .10 0

82 .20 .20

900 .10 .50

TOTAL 0 711.70 368.00 50.60 15.20 2.490.50 49.90 MEAN 0 23.7 11.9 1.63 .52 80.3 1.66 MAX 0 315 123 50 14 805 39 MIN 0 .10 0000 .10 AC-FT 0 1.410 730 100 30 4,940 99

CAL YR 1967 TOTAL 4.917.20 MEAN 13.5 MAX 965 MIN 0 AC-FT 9,750 WTR YR 1968 TOTAL 3.688.40 MEAN 10.1 MAX BOS MIN 0 AC-FT 7,320 SANTA ANA RIVER BASIN

]1078000 SANTA ANA RIVER AT SANTA ANA, CALIF.--CONTINUED DISCHARG

MOV DEC JAN FEB MAR APR MAV JUN 0 0 1,930 0 C 1,980 7,600 06 0 C 2,140 7,110 51 0 0 0 0 02

0 0 3,480 6, 20 95 o 0 3,350 6, 00 51 c 0 2.96C 3, 60 33 0 0 2,580 1, 80 B7 0 0 2,520 1, OG 42 1.3 0 2,250 85 96 0 0 800 50 51 0 6.5 1,000 00 27 G 62 890 850 71 c 0 830 B30 20 .20 3 920 815 66 0 0 954 BOO 48 c 24 905 790 85 0 68 815 780 80 .50 397 BOO 800 75

0 645 6B6 850 95 0 450 1,230 840 10 0 877 3,400 825 10 G 1,970 6,040 815 72 21 3,470 11,400 800 94

1,210 720 1,450 700 2,340 680

,419.0 110 220 1.0 6,780

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1973

NOV DEC JAN FEB MAR APR MAV JUN JUL

146 836.55 5.21 27.0 116 498 SNISV8 83AIU S3139NV SOI ONV 13IU8V9 NVS SAN GABRIEL RIVER BASIN

11080500 EAST FORK SAN GABRIEL RIVER NEAR CAMP BONITA, CALIF.

right bank rk, and

DRAINAGE AREA.--84.6 sq

1932 to September 1970. Prior to 1940, published ar Camp

AVERAGE DISCHARGE.--37 years (1933-70), 72.2 cfs (52,310 acre-ft pe charges, 43 cfs (31,100 acre-ft per year).

EXTREMES. --Ma iximi !t in feet) for 1966-70 ai e- cc>ntained in thf! following tabl e : Ma>[imum Minimum da ily Wtr yr Date Discharge G .H. Date Dischal >5 ' 1966 Dec. 29, 1965 9, 760 13 .82 Oct. 28, 19f 1 1967 Dec. 6, 1966 6, 220 12 .55 Nov. 1, 19f>6 1' 1968 Nov. 19, 1967 693 9 .85 Sept,.25-27, 1968 ! 1969 Jan . 25, 1969 21, 900 15 .74 Oct. 24, 19(>8 i: 1970 Mar. 1, 1970 590 9 .58 Sept,. 9-11, 1970 i. Period of record: Ma charge, 46,000 cfs Mar. 2, 1938, from rating curv xtended above 21,300 cfs (computed by Geological Survey); minimum, 1.5 cfs Oct. 1, 1934. REMARKS.--No regulation or diversion above station. Stage-discharge relation indefinite July 6 to Sept. 30,

COOPERATION.--Records furnished by Los Angeles County Flood Control District and reviewed by Geological Surve REVISIONS (WATER YEARS).--WSP 1635: 1933. WSP 1928: Drainage area.

DAY OC NOV DEC JAN f=EB MAR APR MAY JUN ML AUG SEP

1 10 8. 441 764 140 112 88 64 49 34 25 23 2 9. 393 653 135 ioa 88 66 48 34 25 22 3 1. 344 566 125 102 88 66 48 33 25 21 4 9 fc 296 518 125 101 88 65 46 33 24 20

6 1. 212 430 229 95 84 62 45 33 24 19 7 8. 195 401 207 95 81 59 45 32 24 19 a a. 204 18 10 9. 219 283 156 95 23 16

12 B. 10 221 248 145 94 83 62 42 29 23 17 13 8. 11 191 238 138 92 81 58 42 29 22 17 1* 9. 14 185 227 136 95 78 57 41 29 21 17

16 9. 50 28 2C 16 17 9. 680 180 205 129 16 18 9. 604 165 196 129 94 78 55 39 26 20 17 19 9. 240 157 196 125 94 77 53 40 26 19 20

21 a. 114 146 184 116 94 72 53 39 29 20 19 22 K. 2,250 144 175 116 94 71 53 39 28 20 18 23 a. 2,350 136 166 114 95 69 53 39 28 20 17 25 K. 1,520 133 158 116 107 65 51 38 25 18 17 26 a. 994 128 18 17 27 8. 698 17 28 a. 600 126 155 114 88 65 50 35 25 20 15 30 8. 490 1,960 161 88 65 48 34 26 19 18

18.0 MAX 1 2.35C 2,530 764 229 112 88 66 49 34 25 23 MIN 8. 8.9 126 145 114 88 65 48 34 25 18 15

MIN E .4 AC-FT 6 ,700 SAN GABRIEL RIVER BASIN

11080500 ^AST FORK SAN GABRIEL RIVER NEAR CAMP BONITA, CALIF.--CONTINUED

JUN JUL AUG SEP I 7 14 23 1C1 19? 84 5 15 95 175 86 194 344 221 95 61 46 3 3 15 586 92 161 36 184 351 208 94 55 46 4 B 15 181 90 152 84 228 351 192 94 55 46 8 15 501 90 14C 80 259 355 184 90 55 42 6 9 16 3,195 88 134 75 224 355 1B4 92 54 42 7 8 52 1.6DC 86 41 8 8 63 749 83 134 72 227 351 186 95 54 40 7 34 536 81 129 71 216 380 181 95 5C 39 i: 7 27 436 81 97 49 38 11 8 24 381 77 123 39 268 396 178 90 50 36 12 7 23 333 74 119 1B3 245 351 175 87 51 36 13 6 21 315 74 116 427 ?48 314 170 92 53 38 14 5 20 161 88 57 36 81 59 35 16 16 20 2

23 7 19. 163 68 C2 287 21 6 20 156 68 51 38 22 6 21 152 143 99 288 448 355 127 84 48 38 23 5 21 152 80 51 39 24 6 21 74 5C 39 25 6 21 138 112 71 46 39 26 6 20 136 270 38 294 384 294 KB 69 48 36 27 6 20 127 267 84 46 36 28 1 6 20 117 276 B4 200 396 267 101 69 42 38 29 68 42 38 30 6 23 101 197 189 351 248 94 65 42 36 31 101 202

MEAN 16.7 22.8 379 133 120 213 289 334 152 81.6 51.7 38.4

2,290 210 MIN 14 AC-FT 110, 900

DISCHARGE , IN CUBIC FEET PER SECOND , WATER YEAR OCTOBE R 1967 TO SEPTEM 8ER 1968 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 34 28 40 27 23 18 2 34 28 21 18 3 33 29 55 51 19 20 4 34 28 54 50 45 68 66 50 35 26 8 20 5 34 28 51 49 44 63 66 51 35 29 8 17 28 8 16

MTR YR 196B TOTAL 15,680 MEAN 42.8 MAX 239 MIN 14 SAN GABRIEL RIVER BASIN

11080500 EAST FORK SAN GABRIEL RIVER NEAR CAMP BONITA, CALIF.--CONTINUED

, WATER DAY OCT NOV MAY JUN JUL AUG SE

1 16 16 15 17 720 1,590 488 282 229 137 76 4| 2 16 15 16 16 612 3 16 15 16 16 16 16 15 16 212 123 72 4 16 17 15 16 531 772 505 256 212 121 72 4 6 16 16 15 16 ?06 119 69 4 7 16 16 8 16 15 16 15 15 17 587 660 451 279 195 111 63 4 16 14 15 17 519 687 456 2S5 193 105 61 4 11 17 14 16 17 490 580 463 292 12 16 15 16 16 181 105 64 4 13 15 15 16 18 491 517 416 279 170 105 61 4 14 16 15 15 15 16 2C 15 161 102 59 4

16 16 19 331 256 17 15 17 16 22 18 16 16 16 21 468 380 349 ?50 151 93 57 4 19 15 15 16 50 93 57 4 20 15 91 53 4

21 15 15 16 2 ,110 402 541 328 235 150 88 51 4 22 14 15 16 1 ,080 394 512 341 241 146 87 5C 4 23 14 15 83 49 4 24 13 14 83 48 3 25 14 15 82 49 3 26 14 14 80 50 4 27 14 15 21 2 ,150 2,280 460 296 244 141 82 50 4 28 14 15 20 1 85 49 4 29 15 15 19 1 ,31C 533 279 241 138 80 48 3 33 15 15 IS 965 Him 530 282 238 138 79 47 3 31 16 17 854 06 1,816 1,28

MAX 17 20 229 138 76 4 MIN 13 14 15 16 138 76 46 3 * ' ' MIN 13 AC-FT 25,950 MIN 13 AC-FT 209,900

DISCHARGE , IN CUBIC FEET PER SECOND WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

DAY OCT NOV DEC JAN FEB MAR APR HAY JUN JUL AUG SEP 1 2 37 30 27 25 27 287 68 45 33 20 7 1' 3 37 30 28 33 21 7 14 4 37 3C 28 ?1 7 1' 5 36 30 28 25 27 138 62 48 31 ?2 6 1'

6 36 51 28 ?2 17 1^ 7 36 6C 29 24 26 108 62 50 30 ?1 17 1' 8 9 13 20 16 13

11 36 40 29 32 80 92 72 49 30 10 16 13 12 36 38 28 31 51 88 71 49 30 0 16 15 13 36 37 28 30 46 86 71 49 32 0 18 1! 14 36 36 28 29 41 94 68 48 31 9 19 15 15 36 36 28 33 38 101 64 46 30 9 18 15 16 36 34 28 35 34 101 62 44 29 9 19 16 17 9 27 15 18 58 41 28 9 21 15 19 35 29 27 33 29 95 55 40 28 8 19 16 20 8 18 16

21 35 28 26 31 29 87 57 39 27 8 18 15 22 35 28 26 30 29 86 55 38 25 8 17 15 23 34 30 27 29 29 S3 51 38 ?4 7 17 15 24 34 30 27 29 29 84 50 38 23 8 17 16 25 34 30 27 29 27 84 49 39 23 8 16 16 26 34 30 26 29 27 84 49 39 22 8 16 16 27 34 28 26 29 27 84 54 39 22 8 16 16 28 80 51 40 22 8 16 15 29 31 21 8 16 15 30 30 27 24 28 81 48 38 21 8 15 15 31 30 8 15

MEAN 35.0 33.7 27.1 29.1 37.5 111 59.9 43.4 27.9 19. 3 17.3 14.8 MAX MIN 30 27 24 24 25 75 48 36 21 17 15 13

212,800 MIN 13 AC-FT 27,550 SAN GABRIEL RIVER BASIN

11082000 WEST FORK SAN GABRIEL RIVER AT CAMP RINCON, CALIF.

upstream from Camp Rincon, 0.5 mile downstream from North Fork, and 6 miles dow __ gswell Da DRAINAGE AREA.- -104 sq mi. PERIOD OF RECORD. --October 1927 to September 1970. nty 1941. AVERAGE DISCHARGE. --43 years, 69.6 cfs (50,430 acre-ft per year); median of yearly discharge s, 33 cfs (23,900 acre-ft per year).

1966-70 are contained in the following table: Minimum daily Wtr yr Date Discharge G.H. Date Di s charge 1966 Dec. 29, 1965 13,000 15.00 Oct. 25, 1965 2.7 1967 Dec. 6, 1966 4,700 13.64 Oct. 1, 2, 25 , 1966 7.0 1968 Nov. 19, 1967 1,440 12.21 Sept. 10-13, 26 , 1968 12 1969 Feb. 25, 1969 26,000 20.45 Oct. 25, 1968 10 1970 Feb. 28, 1970 2,370 17.54 Sept. 6-8, 28, 1970 12 Period of record: Maximum discharge, 34,000 cfs (estimated) Mar. 2, 1938; n at times in 1928- 29.

revised) . 8 Angeles R where in t "lis report. COOPERATION. - REVISIONS (WA PER YEARS). --WSP 1315-B: 1930(M) 1933(M). WSP 1928: Drainage area

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCT06ER 1965 TO SEPTEM6ER 1966 JUN JUL AUG SEP

1 17 3.3 68 913 6 64 19 56 37 20 15 14 2 17 3.3 65 787 2 81 45 51 36 20 14 14 3 16 11 4 16 3.5 20 678 6. 5 16 3.5 42 681 6 76 4D 53 33 18 13 6. 6 16 32 16 13 6. 7 16 3.5 64 983 1 74 35 51 33 16 13 9. 8 16 3.5 87 756 1 71 35 50 34 18 13 11 9 16 3.8 89 495 5 71 33 50 35 16 14 9. 10 16 4.1 63 917 9 71 33 50 34 17 14 9. 11 15 4.1 67 902 2 68 33 50 32 17 15 8. 12 15 4.1 BB 848 8 68 33 50 30 17 14 8. 13 15 4.1 52 496 8. 14 16 6.1 50 262 2 71 26 48 29 16 14 9. 15 15 19 43 247 06 70 24 47 29 17 14 11 16 16 17 13 11 17 16 1,460 07 237 04 65 118 44 26 16 12 11 18 15 670 99 225 13 19 15 14 20 13 313 95 204 91 65 61 39 26 15 12 13 21 5. 278 69 193 86 65 59 39 25 15 12 12 22 3. 3.22C 90 190 86 64 64 39 25 14 12 9.9 23 3. 3,250 65 187 86 61 64 39 25 14 12 6.9 24 2. 2,860 63 184 68 65 230 36 25 14 13 6.9 25 2. 1,750 83 160 6.9 26 2. 945 63 143 86 68 436 36 24 15 12 9.9 27 3. 752 66 116 64 65 410 36 23 15 12 9.9 2B 3. 662 105 110 62 71 265 37 22 16 12 9.9 29 3. 619 4,000 112 104 74 37 21 16 11 11 30 3. 12 11 31 3. 1,160 120 102 37 15 13 316.3 MEAN 11. 604 421 433 110 73.5 151 44.6 28.8 16.5 13.0 10.5 MAX 1 37 20 15 14 MIN 2. 3.3 83 110 82 61 59 36 21 14 11 8.9 SAN GABRIEL RIVER BASIN 27ft

11082000 WEST FORK SAN GABRIEL RIVER AT CAMP RINCON, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

OCT MAY JUN JUL AUG Sb 1 7.0 a.c 17 5 2 7.0 8 »C 21 5 3 n 8.0 541 48 234 57 146 368 77 71 69 4 12 11 164 48 218 58 187 322 74 71 66 5 13 12 465 48 209 58 180 322 70 74 64 ! 6 13 13 2,320 48 163 7 14 211 1,460 46 106 54 182 i 9 12 38 322 170 74 62 4 10 12 29 314 170 77 62 4 11 11 25 257 42 90 72 285 311 165 77 62 4 12 13 23 234 42 87 254 243 339 165 74 6C 4

14 12 21 205 40 102 926 226 314 156 69 60 5

16 9.9 19 226 33 79 858 190 307 111 66 64 *

18 3.9 17 129 38 76 333 253 293 104 64 62 4 19 8.0 17 118 33 77 241 338 293 100 66 60 6 7 21 8.9 18 72 36 70 181 -,7 23 3.9 15 65 187 7 24 8.0 15 61 535 65 133 49B 151 91 60 55 7 25 7.0 15 59 484 70 126 540 142 86 60 55 7 26 8.0 15 58 244 67 122 594 146 86 57 55 7 27 8.9 16 57 238 65 118 592 146 88 55 55 23 8.9 17 54 353 62 115 592 142 88 53 55 ; 88

MEAN 10.1 26.2 291 136 115 228 318 273 131 65.9 59.5 M 7 MIN 7.0 8.0 17 36 62 54 142 142 86 53 53 3,5^ 220

DISCHARGE , IN CUE 1C FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMf ER 1968 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 71 69 60 94 46 50 50 . 26 23 20 7 14 2 74 69 46 91 45 48 52 27 23 18 6 14 3 74 65 4? 88 45 48 41 27 23 17 5 15 4 74 33 42 76 43 48 36 27 23 16 5 15 5 74 31 33 43 41 48 35 27 23 16 5 15

6 74 31 115 48 41 48 35 27 23 17 5 14 3 71 31 42 46 43 203 33 25 26 17 6 14 9 71 31 88 46 61 91 33 26 26 17 6 13 10 74 31 88 45 76 71 33 27 24 17 15 12 11 74 31 88 45 60 64 33 27 23 16 4 12 12 74 31 88 45 57 62 35 30 22 16 4 12 13 67 31 86 45 84 64 35 29 22 17 4 12 14 71 31 70 43 102 60 35 28 20 17 5 13 15 71 31 45 38 86 55 33 27 20 17 5 14 69 33 45 16 14 17 71 55 35 25 20 17 17 14 18 66 35 3 33 69 57 33 23 20 17 17 13 19 66 453 7 3B 62 50 31 22 20 17 17 14 20 69 254 2 38 64 48 31 22 20 17 17 14 21 69 502 0 38 64 50 30 23 20 17 17 14 22 71 559 0 33 62 43 29 24 20 16 16 14 23 71 331 4 38 57 45 23 24 19 16 15 14 24 71 179 4 36 57 43 30 27 19 16 15 13

26 71 151 62 37 55 38 23 25 20 15 15 12 27 69 142 62 71 53 36 28 24 20 15 5 13 28 69 133 62 53 53 35 29 24 20 16 5 13 29 69 126 65 48 53 35 29 23 20 17 4 14 30 69 181 97 46 33 28 24 20 17 4 15

MEAN 70.8 123 81.0 49.4 59.3 55.3 33.6 25.5 21.4 16.7 15.4 13.6 MIN 66 31 42 36 41 31 28 22 19 15 14 12 SAN GABRIEL RIVER BASIN

11082000 WEST FORK SAN GABRIEL RIVER AT CAMP RINCON, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

DAY OCT NOV DEC JAN FFB MAR APR MAY JUN JUL AUG SEP

1 16 14 11 14 707 2 5 14 11 14 3 6 14 11 13 4 6 14 11 13 5 5 14 11 13 582 762 30C 146 103 61 f>t 46

6 5 14 11 13 1.B5C 710 363 156 1CI 60 58 45 7 5 13 11 13 1,910 919 334 171 97 61 55 40

9 5 13 11 12 976 802 304 183 93 67 55 43

11 16 13 12 12 659 717 294 156 93 60 55 43 12 16 13 12 13 51 43 13 15 13 11 14 16 13 11 42 323 532 266 154 95 60 54 43

16 26 14 12 ?0 329 314 248 146 95 51 52 40 17 30 13 12 19 305 314 240 141 93 49 52 40 18 40 13 13 19 316 318 24C 137 89 39 19 4B 13 13 233 134 87 76 48 40 20 48 12 13 550 371 323 230 137 83 74 52 42

22 53 12 13 2, 150 501 351 241 139 83 71 49 46

24 11 11 13 2, 630 ,490 328 213 132 60 71 51 42 25 10 11 20 13, 000 1 ,400 318 252 129 78 71 52 40

27 11 11 17 4, 500 ,7CO 351 183 25 81 71 45 43 28 12 11 14 1, 380 ,20C 334 183 20 80 71 45 42

30 13 11 14 969 331 159 12 76 66 46 38

MAX 53 18 000 210 112 76 66 46 MIN 10 11 11 12 38

900

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 197u

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUC SEP

1 42 39 24 23 24 738 51 33 23 8 15 13 2 43 39 24 23 24 788 46 32 23 8 15 13 3 43 39 25 23 24 4B6 45 32 23 B 15 13

5 35 39 25 23 23 269 43 32 7 15 13

6 30 65 25 23 23 280 42 33 23 17 15 12 7 43 78 25 23 23 26B 43 33 23 17 15 12 8 43 90 25 23 23 256 42 33 23 17 14 12 9 17 14 13 10 14 13

11 42 99 25 3B 224 186 39 31 26 17 14 13 12 38 30 26 17 14 14 13 39 29 26 17 14 15 14 40 97 25 38 91 144 40 28 26 17 14 15 15 43 95 25 3B 87 139 40 27 25 17 14 15

16 43 95 25 45 85 137 40 27 25 17 13 14 17 43 8 25 42 79 127 40 27 24 16 14 14

19 42 B 25 37 45 125 39 27 22 16 14 14 20 40 B 25 36 39 123 39 27 21 16 14 14

21 40 B 25 30 38 120 40 27 20 16 14 14

23 40 9 25 27 35 114 38 27 20 16 4 14 24 14 25 16 13 14

27 42 26 23 25 27 101 37 28 19 15 13 13 28 19 15 13 12 29 2B 19 15 13 13 30 42 23 23 24 103 34 27 18 15 13 13

MAX 768 51 33 26 IB 15 15 MIN 30 23 23 23 23 92 34 26 IB 15 13 12

MIN 12 AC-FT 268, 300 MIN 12 AC-FT 35, 860 SAN GABRIEL RIVER BASIN 27,3

11083500 SAN GABRIEL RIVER NEAR AZUSA, CALIF.

DRAINAGE.--214 sq mi. PERIOD OF RECORD.--May to November 1894, September 189S to September 1966 (discontinued). es County Flood

AVERAGE DISCHARGE (COMBINED).--71 years (1895-1966), 146 cfs (105,700 acre per year), adjusted for dive

EXTREMES.--Pe discharge 65,700 cfs Mar, 2, 1938, by computati of peak flow over Morris

since 1939 (combined capacity, 53,870 acre-ft) and by Morris Reservoir since 1934 (capacity, 35,000 acre -ft). elease of 125 acre-ft

1, San Gabriel, and Mo *ll"%"R *' ? %"¥ th tabc e 1 hef " in - J E IheSe cflgV" S °8 YischarPge are equivalent San

REVISIONS (WATER YEARS).--WSP 961: 1941. WSP 1315-B: 1920(M). WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FFET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

MAR APR MAY JUN JUL AUG SEP 1 8.3 .70 C 2 8.4 .60 0 3 0 0 ,250 1,330 46 580 115 9.0 .50 0 4 0 0 ,280 1,340 46 585 143 8.4 .40 0

6 0 0 ,320 1,323 50 590 160 7.6 .20 0 B 0 C ,320 1,080 54 6.6 72 7.6 0 0 9 7.6 C 0 10 0 0 814 7.6 0 0

12 0 0 453 1,010 154 97 63 8.0 0 0 3 0 0 399 1,000 156 99 92 7.6 0 0 4 0 0 341 1,030 156 105 113 7.6 C 0

6 0 0 218 1,010 207 100 107 B.O 0 0 7 0 5.2 96 1,080 230 100 109 B.O 0 0 9 C 0 7.5 1.050 230 100 52 2C5 0 B.I 0 0 0 5.3 926 230 100 48 205 0 11

2 0 1,620 36 735 228 102 41 200 0 0 3 0 7,260 34 710 228 92 15 200 0 0 4 0 4,230 34 497 228 102 10 200 0 0 5 0 2,16C 34 492 228 102 9.0 19B 0 0 0 ' 6 C 1,640 34 246 228 102 B.O 126 0 ^ 0 1,250 34 89 22B 10C B.O 15 0 0 8 0 1,250 91 144 277 100 8.0 5.0 C 0 9 0 1,230 693 144 100 8.0 3.0 0 8.1 0 0 1,160 2,120 146 ll'l 8.0 2.0 0 11

AN .17 727 594 874 188 179 69.4 59.5 .093 0 1.23 0 N 0 3 5.1 89 146 6.6 8.0 1.0 0 0 0 0 5.6 0 76 o t )

TR YR 1966 TOTAL 82,119.90 MEAN 225 MAX 7,260 MIN 0 AC-FT 162 ,900 * +224,737

t COMBINED DISCHARGE, IN ACRE-FEET, OF RIVER AND DIVERSIONS. 274 SAN GABRIEL RIVER BASIN

11084500 FISH CREEK NEAR DUARTE, CALIF. LOCATION.--Lat 34°09'57", long 117°55'24", in SWsStPcSWic sec.15, T.I N., R.10 W., Los Angeles County, on 0.8 mile upstream from mouth of canyon and 3.2 miles northeast of Duarte. DRAINAGE AREA.--6.36 sq mi.

PERI

GAGE 9 05.9 ft (revised) abo ve mean sea level. See WSP 1928 for history changes prior to Oct. 3, 1951.

AVERAGE DISCHARGE. --53 ye ars (1917-70) , 4.64 c fs (3,360 acre-ft per year); median of yearly mean discharges, 2.3 cfs (1,700 acre-ft per year) . EXTREMES. --Maxi mums and m.inimums (di scharge in cubic feet per second, gage height in feet).

Ann.ual maximum discharge (*) and p eak discharg es above base (60 cfs), wat er years 1966 -70 Date Time Dis ch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 17, 1965 0400 336 4.05 Dec. 6 , 1966 1615 *1,670 6.22 Jan. 21 , 1969 0815 2,130 6.68 Nov. 22, 1965 2200 1, 120 5.60 Jan. 24 , 1967 1815 576 4.67 Jan. 25 , 1969 0530 *13,000 all. 98 Dec. 29, 1965 1700 *2, 250 6.80 Mar. 13 , 1967 0815 106 2.96 Feb. 6 , 1969 0530 594 5.71 Feb. 6, 1966 0900 63 2.42 Apr. 22 , 1967 0115 168 3.23 Feb. 25 , 1969 0700 5,030 a8.6 Nov. 7, 1966 1715 93 2.80 Nov. 19 , 1967 0930 *282 3.87 Feb. 10 , 1970 2045 119 3.09 Dec. 3, 1966 0630 589 4.70 Mar. 8 , 1968 0545 142 3.24 Feb. 28 , 1970 1730 *898 5.27 a From inside gage.

Annua Wtr yr Date Di Discharge 1966 At time s 0 1969 Nov. 26, 27, Dec. 4, 1969 .69 1967 do. 0. 1970 Aug. 16-24, 1970 .76 1968 Aug. 25 , 1968 .35

Period of record: charge, 13 ,000 cfs Jan . 25, 1969 (gage height, 11 .98 ft, from inside gage) , f rom rating nded above 1,100 cfs on basis of slope- area measurement of p eak flow; max imum gage h eight, abou t 14.5 ft Feb. 11, 16 , 1959 (fr om debris wave) ; no flow at times in some years. REMA ,RKS.--Recor d ewhere in this

REVISIONS (WATER YEARS).--WSP 706: 1926. WSP 1635: 1925-26(M). WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY

1 .10 .20 14 7 6.7 6. 4.2 2. 1.7 1.3 .BO .60 2 0 .10 12 7 6.5 6. 4.2 2. 1.9 1.3 1.0 .50 3 0 .10 12 6 5.9 6. 4.3 2. 1.9 1.4 1.0 .30

11084500 FISH CREEK NEAR DUARTE, CALIF.--CONTINUED

SE|P .70 1.9 5.1 20 7.'5 9 23 9.2 .3 3. 2.1 .70 4.1 5.1 8 7.0 0 21 8.4 .3 3. 2.4 . 8C 206 4.7 7.1 5 20 8.2 .3 3. 2.6 .90 25 4.2 7.3 6 20 .8 .3 2. 2.|6 .90 119 4.2 6.9 5 19 .7 .3 2. 2.|5 .90 688 4.2 6.7 4 19 .6 .2 3. 2.4 31 159 4.1 6.5 6 18 .6 .0 3. 2.13 4.5 72 4.1 6.6 4 17 .5 .9 3. 2.J3 l.C 50 4.1 6.5 3 18 .6 .8 3. 2.2 .80 40 3.9 6.6 3 18 ,5 .a 2. 2.3 1.0 35 3.8 8.1 4 17 . 2 .7 2. 2.2 1.0 30 3.6 35 2 17 .6 .6 2. 2.2 .90 27 3.6 88 9 16 .3 .5 2. 2.3 l.C 23 3.6 49 8 15 .0 .6 2. 2.5 1.0 17 3.3 31 7 14 .6 .5 2. 2.4 .90 15 3.2 .5 24 7 14 .6 .5 2. 2.4 l.C 13 3.0 .5 19 6 14 .8 .5 2. 2.4 1.3 12 2.9 .5 18 2 14 .6 .2 2. 2.7 1.2 10 2.9 .5 16 3 17 .2 .1 2. 2.'^ 1.0 9.5 2.9 .0 16 6 16 1 .0 2. .90 8. 2.7 8.7 15 1 15 .! .9 2. 2.f> .90 8. I 8.5 14 9 12 , | .8 2. 2.5 l.C 7. 2 8.3 13 6 12 .0 .7 2. 2.5 1.1 7. 1 6 8.2 13 2 12 .0 .6 2. 2. [7 1.4 6. 10 8.1 12 7 11 9 .6 2. 2.8 1.5 6. 6 7.9 12 4 11 .7 .6 2. 2.6 1.6 5. 8 7.7 11 1 10 .5 .4 2. 2. A 1.7 4. 0 7.6 11 0 10 .6 .4 2. 2.5 1.7 4. 7 10 7 10 .6 .4 1. 1.8 5. 6 10 5 9.9 6 .2 1. 2.3

TOTAL 25.00 66.10 1,625.2 6 9.2 311.0 507.8 791 471.9 205.2 134.2 79. 73.7 MAX .90 31 688 156 2C20 88 89 23 9.2 5.3 3. 2.9 MIN .60 .70 AC-FT 50 131 3,220

DAY OCT MOV DEC JAN FEB MAR APR MAY JUN JUL AUG

2 2.1 1.7 5.1 3.2 . 7 2.8 4.3 1.8 .2 .72 .58 .76 3 2.1 1.7 4.3 3.0 2.7 2.7 1.9 .1 .67 .49 .85 4 2.1 1.7 3.B 2.8 . 3 2.7 2.4 1.7 .3 .71 .46 .97 5 2.1 1.8 3.6 2.8

7 1.9 1.8 3.3 2.6 .0 5.5 2.3 1.6 .5 .78 .57 .80 a 1.8 1.7 3.2 2.5 .9 44 2.1 1.6 .6 .74 .49 9 1.9 1.7 3.1 2.4 .4 7.8 1.8 1.6 .5 .66 .45 .7^ 13 1.9 1.8 2.8 2.8 .0 5.8 1.7 1.6 .3 .57 .44 72 11 1.8 1.7 2.7 3.2 ,3 5.5 1.7 1.5 .1 .55 .45 .83 12 1.8 1.6 2.6 2.5 .4 4.4 1.9 1.8 .1 .49 .47 .8* 13 1.8 1.5 2.5 2.4 .5 3.8 1.9 1.8 .0 .54 .54 .8t 14 1.8 1.5 2.7 2.3 .8 3.4 1.8 1.6 .99 .65 .60 95 15 1.6 1.6 2.7 2.3 .1 2.9 1.8 1.4 .88 .72 .61 1.2 T 16 1.6 1.7 2.7 2.4 .3 2.8 2.0 1.4 .84 .70 .68 .2 17 1.6 1.7 2.8 2.2 .5 2.7 1.8 1.3 .85 .66 .64 .1 18 1.6 1.9 6.4 2.1 .1 2.5 1.7 1.2 .87 .61 .77 .0 20 1.5 9.5 6.2 2.0 .1 2.2 1.8 1.2 .70 .53 .66 .3 21 1.7 18 4.7 1.9 .0 2.1 1.8 1.3 .65 .52 .65 .2 22 1.9 8.0 4.3 1.9 .8 2.2 1.6 1.4 .62 .54 .55 .0 23 1.8 5.9 4.0 1.9 .5 2.2 1.5 1.4 .56 .52 . 7 .90 24 1.7 4.2 4.D 1.8 .4 2.3 1.4 1.4 .70 .53 . 9 .96 25 1.7 3.4 3.9 1.9 .1 2.2 1.3 1.2 .76 .52 . 5 .93 26 .73 .51 . 3 27 .75 .53 . 8 .96^ 28 1.9 3.1 3.5 4.9 2.7 2.3 1.4 1.2 .84 .62 . 1 1.1 30 1.7 11 3.3 3.1 2.4 1.7 1.2 .92 .65 . 2 1.2

MEAN 1.82 4.47 3.82 2.73 3.32 4.45 1.99 1.46 1.01 .62 .55 .96 MAX 2.2 32 6.7 6.6 6.B 44 4.6 1.9 1.6 .76 .84 1.3 MIN 1.5 1.5 2.5 l.B 1.9 2.1 1.3 1.1 .58 .49 .35 .68 AC-FT 112 266 235 168 191 273 118 90 60 3B 34 5t

HTR YR 1968 TOTAL B2B .27 MEAN 2.26 MAX 44 MIN .35 AC-FT 1,640 SAN GABRIEL RIVER BASIN

11084500 FISH CREEK NEAR DUARTE, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

1 .2 .2 .77 l.l 60 9b IB 7.7 5.2 3.6 2.C 2 .2 .2 .77 1.2 45 75 19 10 3 .2 .2 .77 1.2 37 68 24 10 7.5 5.2 3.4 2.i 4 .2 .2 69 1.3 31 61 17 11 7.3 5.1 3.1 2.' 5 .2 .2 5.1 3.1 2.C

6 .2 .1 74 1.5 166 52 20 10 7.2 5.1 3.1 2.1 7 .2 .1 74 1.5 137 50 18 9.3 7.2 5.1 2.C a .? .C 76 1.6 76 46 16 B.7 7.1 5.1 3.C 2.' 9 .2 .97 77 1.9 82 42 15 8.2 7.0 5.1 3.C 2.C 10 .2 .97 77 1.9 92 40 16 B.I 7.0 5.2 3.C 2.C 11 .2 .93 85 2.0 1C2 38 15 B.I 7.0 5.4 3.', 2. 12 .2 .92 85 2.0 72 35 14 7.9 7.1 5.7 2.£ 13 .2 .98 85 2.8 5C 33 14 7.9 6.7 5.8 2.6 2.C 14 .2 .94 85 11 40 31 13 9.0 6.4 5.9 2.0 2.C 15 .2 1 .4 96 2.B 35 29 13 B.7 6.3 5.4 1.9 2.C

16 .2 1.0 2.2 29 28 13 8.7 6.4 5.4 1.8 2. 17 .2 .85 1.9 53 27 12 7.9 6.5 5.2 l.B 2. 18 .1 .85 2.0 32 26 13 11 6.1 4.9 1.7 2.'2.t 19 .1 .85 14 24 25 12 10 5.B V.6 1.5 2.' 2C .2 .77 75 ?3 24 12 9.7 5.B 4.6 1.3 21 .2 .77 9.7 1.2 2. 790 21 30 13 5.8 .3 2.' 22 .2 .77 150 32 27 13 9.0 5.8 .0 1.1 23 .1 .77 130 2B2 25 13 7.1 5.8 .6 1.1 2.1 24 .1 .73 450 566 23 12 6.9 5.6 .5 2.8 2.t 25 .1 .74 3 ,370 930 22 11 7.3 5.6 .4 4.1 2.t 26 .1 .6-) 1 ,600 450 21 11 6.8 5.6 3.2 4.2 2.1 27 .1 .69 1 ,170 250 20 11 7.1 5.4 3.0 2.9 2.1 28 .1 .72 400 150 19 11 7.2 5.4 3.0 2.4 2.' 29 .2 .72 125 18 10 7.6 5.3 2.9 2.2 2.' 30 .3 .75 85 19 11 7.6 5.2 3.1 2.~ 2.! 31 .3 18

MEAN 1 18 .93 .97 280 139 36.2 14.5 8.65 6.41 4.58 2.53 2.31 MAX .3 1.4 1.9 3,370 930 95 25 11 7.7 5.9 4.2 2.E MIN .1 .69 .69 1.1 21 IB 1C 6.B 5.2 2.9 1.1 2.C 13S

MIN .35 AC-FT 1,220 MIN

NOTE. NO GAGE-HEIGHT RECORD AUG. 27 TO SEPT. 30.

DAY OCT NOV r EC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 2.5 1.6 l.B 2.4 9B 5.9 4.3 2.7 2.4 .2 .9 2 2.4 1.7 .2 1.8 2.4 92 .9 3 2.5 1.7 .3 1.8 2.4 32 5.4 4.1 2.6 2.3 .1 .9 4 2.4 1.8 .3 1.8 2.4 33 .9 5 2.0 1.9 .3 1..9 2.4 43 5.3 4.4 2.6 2.2 .1 .9

6 1.9 13 .3 1.9 2.4 26 5.2 4.4 2.9 2.1 .96 .9 7 1.8 12 .1 1.9 2.4 17 4.5 8 1.9 2.0 .C 1.9 2.7 15 4.8 9 1.9 1.9 1.9 2.4 14 4.7 4.7 2.7 2.1 .92 .9 1C 1.9 1.9 .9 5.1 41 11 4.6 4.7 2.7 2.C .88 .9 11 1.9 1.9 .9 2.7 21 ID 4.7 4.5 2.7 1.9 l.C .9 12 1.9 1.9' 1.0 .9 13 1.9 14 l.B l.B 2.2 1.9 .92 .9 15 1.9 1.8 .9 2.2 4.5 8.4 4.3 4.1 3.0 1.9 .85 .9 1.8 .76 .9 17 1.9 1.9 1.8 .76 .9 1.7 .76 .9 19 1.8 1.8 2.0 1.7 .76 .9 20 l.B 1.8 2.1 2.5 4.6 7.3 4.0 4.1 2.9 1.6 .76 .9 21 1.6 i.e 2.2 2.5 4.6 7.2 3.9 4.1 2.9 1.4 22 1.8 1.3 .76 .9 23 1.7 4.1 1.3 24 1.8 1.7 2.? 4.1 1.3 25 1.8 .83 .9 26 l.B 1-.6 2.1 1.4 .83 .9 27 1.8 1.6 1.8 .87 .9 28 1.7 1.7 1.7 2.5 99 6.3 4.7 3.3 2.5 1.4 .91 .9 29 1.7 1.8 1.7 2.5 6.0 4.4 4.3 2.5 1.3 .91 .9 30 1.7 1.8 l.B 2.5 6.2 4.3 3.9 2.5 1.3 .91 .9 31 1.6 TOTAL 59.1 1.76 .90 .91 MAX 2.5 13 2.3 5.1 99 98 5.9 4.7 3.0 2.4 1.2 .91 MIN 1.6 1.6 1.7 1.8 2.4 6.0 3.B 2.9 2.5 1.3 .76 .91

MIN NOTE. NO GAGE-;HEIGHT RECORD MAR. 20 TO APR. 21, JUNE 15 TO JULY 20. SAN GABRIEL RIVER BASIN

11085000 SAN GABRIEL RIVER BELOW SANTA FE DAM, NEAR BALDWIN PARK, CALIF. LOCATION.--Lat 34°06'44", long 117°58'07", in SE^NE^St^; sec 6, T.I S., R.IO W., Los Angeles County, on left ba

north of Baldwin Park.

DRAINAGE AREA.--236 sq mi. PERIOD OF RECORD.--Octo 1942 to Septembe

GAGE.--Water-stage reco r. Datum of gage EXTREMES.--Maxi 1966-70 contained in the following table

Date Discharge G.H. Date Nov. 3, 1965 11,100 17.14 Most of time Mar. 3, 1967 614 11.56 do. Nov. 9, 1967 30 10.44 Jan . 6, 1969 30,900 22.20 Mar. 4, 1970 458 11. 23 do!

53,870 32,640 repleni

Flood Control District. REVISIONS (WATER YEARS!.--WSP 1315-B and 1635: 1943(M). WSP 1928: Dr

TO SEPTEMBEF

AY OCT NDV DEC JAN FFB MAR APR MAY JUN JUL

1 0 0 1,100 125 30 43 0 1C1 2 C 0 945 16 C 0 j; 75 3 0 9 756 C 51 0 0 19 4 0 1 B40 Q 91 0 0 0 ^ ! 5 894 c 105 0 o 0 t 0 3 76 0 116 0 0 0 7 0 0 77 46 120 0 0 0 8 C u 29 85 108 C 0 0 9 0 6 43 85 101 0 0 0 10 0 5 15 85 101 0 0 0 26 1 C 4 61 79 98 0 0 2 C 8 61 75 98 106 0 0 3 0 8 12 75 95 98 0 0 4 0 t 06 75 98 9B 0 0 ^ 0 4 98 75 101 105 0 0

6 0 0 7 0 12 74 58 46 112 0 0 a 0 0 B2 5B 34 108 0 0 9 0 3 B2 58 23 101 0 0 0 C 0 74 55 20 95 0 a 1 C 0 56 60 OB 82 0 0 2 0 0 26 63 01 61 0 0 3 6,000 0 10 85 98 48 57 0 4 5,510 0 49 12C 98 18 117 0 ^ 2,640 0 14 108 9B 0 155 0 6 1,410 0 30 85 101 0 155 0 7 303 0 39 72 101 0 76 0 8 482 0 46 63 101 0 0 0 9 482 233 85 98 0 0 0 0 482 689 85 ______95 0 0 0 1 1,310 83 91 81 TAL 641 195 0 AN 0 577 322 463 63.6 98.4 40.4 20.7 6.50 0 X 0 6,000 1,310 1,100 125 146 112 155 101 0 N 0 0 C 46 0 0 0 0 0 0 -FT 2,410 1,270 387 0 ) 0 AL YR 1965 TOTAL 27,285.00 MEAN 74.8 MAX 6,000 MIN 0

t COMBINED DISCHARGE, IN ACRE-FEET, OF RIVER AND DIVERSION TO RIO HONDO. SAN GABRIEL RIVER BASIN

11085000 SAN GABRIEL RIVER BELOW SANTA FE DAM, NEAR BALDWIN PARK, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 DAY OCT NOV DEC JAN FEB

1 ,) D 418 0 53 2C 6 2 0 C 456 G 53 17 6 3 C 0 312 0 50 18 6 4 0 C 213 0 47 IB 6 5 0 C 172 0 41 18 6 6 20 G 116 0 36 IB 6 7 55 C 31 0 34 18 6 8 72 0 C 0 34 17 6 9 23 G D 0 32 14 6 10 23 0 0 G 32 13 6 11 2T 1.9 0 0 34 15 6 12 20 33 D 0 34 16 6 13 34 0 0 0 34 16 3 14 99 0 0 90 34 16 6 15 22 .80 0 176 32 15 2 16 04 9.5 D 185 30 15 3 17 94 14 0 277 2B 14 0 IB 18 12 0 347 27 15 2 19 22 9.5 0 334 27 16 0 20 04 9.3 0 328 25 17 0 21 80 0 C 381 25 17 D 22 94 0 0 538 100 17 G 23 94 22 0 597 213 17 0 24 04 34 C 434 196 18 0 25 08 197 0 123 142 IB 0 26 99 325 0 116 142 18 0 2T 99 396 0 108 189 17 0 28 10 410 0 101 222 17 G 29 .20 403 ------74 232 17 G 30 0 > G 31 0 410 55 1T6

MEAN C C 120 66.8 61.4 139 80.3 171 83. 3 GOO MAX 0 0 222 410 MIN 000 0 138 D 0 C D

WTR YR 1967 TOTAL 22,649.20 MEAN 62.1 MAX 597 MIN 0 t COMBINED DISCHARGE, IN ACRE-FEET, OF RIVER AND DIVERSION TO RIO HONDO.

DISCHARGE, IN CUBIC FEET PER SECONG, WATER YEAR OCTOBER 196T TO SEPTEMBER 1968

IAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL

30 0 0 0 31 0 0

TOTAL 0 2.0 2.8 .TO 0 0 0 0 MEAN 0 .067 .090 .023 0 0 0 0 MAX 0 2.G 2.8 .70 0 0 0 0 MIN 0 0 0 0 0 0 0 0 AC -FT 0 4.C 5.6 1.4 0 0 0 G

CAL YR 1967 TOTAL IB, 928. 80 MEAN 51.9 MAX 597 MIN 0 AC-FT 37,540 WTR YR 1968 TOTAL 5.50 MEAN .015 MAX 2.8 MIN 0 AC-FT 11 NOTE. NO WATER DIVERTED TO RIO HONDO DURING WATER YEAR. SAN GABRIEL RIVER BASIN

11085000 SAN GABRIEL RIVER BELOW SANTA FE DAM, NEAR BALDWIN PARK, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 CAY JUN JUL AUG

1 112 5,530 26 375 155 2 5 351 561 0 354 163 3 D 474 155 102 334 155 4 0 292 -151- 44B 328 131 5 0 2 ,080 146 606 334 1C8

6 0 5 ,39C 146 606 328 85 7 0 4 ,07C 663 538 322 64 8 0 3 ,780 ,540 482 316 0 9 0 3 ,720 ,550 554 304 0 1' 0 1 ,310 ,570 498 292 C 11 0 146 ,300 458 286 5 12 C 151 ,280 482 280 13 0 146 ,480 474 269 3 14 0 15 0 146 660 306 269 0

16 3 142 669 Q 263 0 17 a 221 466 0 269 0 18 3 314 134 15 269 J 19 0 34C 75 85 274 5.1 20 0 340 75 146 280 0 21 164 34C 75 237 280 3 22 242 340 72 292 280 0 23 C 24 2,6:0 4 ,480 15 368 253 25 12,400 17 ,600 10 389 253 26 0 27 11,800 13 ,200 63 375 222 0 28 12,300 1C ,400 66 375 185 0 29 48 . 69 368 159 0 30 197 69 368 159 0 31 155 TOTAL C 0 C 3 2,151 3 C MAX 0 WIN 0000 112 10 0 155 0 0 0 AC-FT 0 (t)

MAX .70 MIN 0 AC-FT 1.4 t 0 WTR YR 1969 TOTAL 197,228.10 MEAN 540

t COMBINED DISCHARGE, IN ACRE-FEET, OF RIVER AND DIVERSION TO RIO HONDO

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SE!P 1 0 107 58 2 0 248 55 3 0 237 53 4 0 261 43 5 0 263 2D 6 0 238 9.5 7 0 218 9.5 8 0 218 9.5 9 0 218 9.5 10 0 213 9.5 11 0 208 B.6 12 9.6 204 6.9 13 7.7 204 7.7 14 .62 199 9.5 15 D 199 8.6

16 0 205 8.6 17 0 125 5.0

31

TOTAL 18. IS ,491 331.* MEAN .65 145 11.0 MAX 9.6 263 58 M1N AC-FT

t COMBINED DISCHARGE, IN ACRE-FEET, OF RIVER AND DIVERSION TO RIO HONDO. 11086300 SAN DIMAS CREEK BELOW SAN DIMAS DAM, CALIF.

DRAINAGE AREA.--16.3 sq

.--October 1951 t 3 Septemb g P WSP 1735. GAGE. --Water-sta trol District). EXTREMES. --Maxim llowing table: Maxim Wtr yr Date Di scharge G.H. Date Discharge 1966 Nov. 23, 1965 500 Apr. 9 to May 8, 1966 .10 1967 Dec. 6, 1966 1,190 4.31 Nov. 19 to Dec. 2, 1966 0 1968 Nov. 3, 1967 48 1.10 Apr. 2, June 7, 1968 0 1969 Jan. 25, 1969 4,280 6.98 Tan. 1, 2, July 4-29, 1969 0 1970 Apr. 14, 1970 60 .77 Oct. 1, 2, 1969 .36

extended abov utation of peak flo REMARKS. --Flow r f 6 f df d b n. Se sche at c lagra of a a r 1 L Angeles River basins elsewhere in this report.

REVISIONS.- -WSP 1928: Drainage a ea.

DAY OCT NDV DEC JAN- FEB MAR APR MAY JUN JUL AUG Sf=P 1 .20 .20 4 56 2 .20 .2C 2 55 4 .30 53 5 .40 .2C 0 37

7 .50 .20 0 33 13 7.2 7.2 .10 4.4 3.B 2.7 2.7 8 .50 .20 0 33 23 5.2 4.4 .10 4.2 3.8 2.7 2.6 9 .50 .20 6.8 32 35 5.8 .10 3.3 4.2 3.8 2.7 2.6 10 .50 .20 7.0 32 34 9.9 .10 4.9 4..2 3.8 2.9 2.6

11 .40 .20 8.; 32 27 7.7 .1C 4.9 4.2 3.~8 2.9 2.6 12 .40 .ZC 8. 30 20 7.7 . 0 4.9 4.4 3.8 2.9 2.6 13 .40 .20 B. 28 14 .40 .20 9. 22 19 7.7 15 .40 .20 8. 19 19 8.0 . 0 5.1 4.7 3.8 2.7 2.6 16 .40 .20 8. 8 16 8.0 . 0 5.1 4.7 3.8 2.7 2.7 17 .40 .20 9. 7 13 8.0 . 0 5.1 4.7 3.8 2.7 2.7 18 .30 .20 9. 7 13 8.0 . 0 5.1 4.7 3.6 2.7 2.7 19 .30 7.6 9. 6 12 8.0 . 0 4.9 4.4 3.6 2.7 2.7

21 .30 6.2 8. 15 22 .30 68 8. 15 23 .30 242 8. 15 9.2 7.2 .10 4.9 4.4 3.6 2.7 2.7 24 .30 51 8. 14 8.7 7.2 .10 4.9 4.4 3.6 2.7 2.7

26 .20 58 8. 11 28 .20 59 8.0 8.7 29 .20 58 71 8.0 7.2 .10 4.9 4.7 3.6 2.7 2.6 30 .20 31 135 31 .20 56 7.4 7.2 4.7 3.6 2.7

MEAN .33 WIN .20 .20 6.8

AC-FT 6,330 SAN GABRIEL RIVER BASIN

11086300 SAN DIMAS CREEK BELOW SAN DIMAS DAM, CALIF.--CONTINUED

DAY OCT NOV DE C JAN FEB MAR APR MAY UN JUL A JG 5

2.4 1.2 0 8.8 52 9.5 3 8 22 .20 LO J 2.4 1.2 3 8.8 40 9.5 3 8 22 .20 C 2.4 1.2 .1 0 8.4 30 9.5 3 5 22 .20 Lt 4 2.4 1.3 l.C 8.4 30

2.4 .70 516 8.1 29 3.9 13 0 22 44 LC 4 2.4 .70 383 7.7 22 .50 13 0 20 38 2.4 B.B 3 7.7 1R .50 14 0 16 29 c 1 2.4 7.6 7 7.0 18 .50 14 4 15 29 0 \ 1 2.2 1.7 9 7.7 17 .50 14 4 13 29 0 4

1 2.2 1.5 2 7.7 17 .60 14 1 2.1 1.3 2 7.7 17 .80 14 31 13 28 "0 \ 13 1.1 1.1 2 7.7 17 2.4 14 11 14 28 0 J 14 2.1 .50 0 7.7 17 5.8 14 16 14 29 c 4 15 1.9 .!& C 7.7 17 5.8 14 38 12 29 ^ 16 1.9 .10 0 7.7 17 5.5 14 34 12 29 0 \ 17 1.8 .1C 4 9.3 15 5.5 13 43 12 29 0 J 18 I. H .1C 4 B.4 13 5.5 14 48 12 28 0 ^ 19 3.1 C 4 8.4 12 5.5 31 41 12 2B c 1 20 3.1

328. 40 762.80 3. C, 17.I MEAN 2.32 1.00 43. 3 18.6 18.7 11.2 29.6 31.1 1C .9 24.6 ° 3 MAX 4.4 8.8 51 6 59 52 28 130 48 22 44 o a WIN 1.2 0 ) 7.0 9.8 .50 13 11 20 .20 o .!

DAY OCT NOV DEC JAN FEB MAR APR MAY J UN JUL Al S|E

1 8.4 14 9. 1 4.7 11 3.2 .10 .10 10 .10 0 2 8.4 27 8. .10 10 .10 c 3 8.4 38 8. 4 12 3.5 3.2 .10 .10 60 .10 .1 0 40 45 8. 0 15 3.5 3.2 .10 .10 1. 2 .10 0 51 45 7. 7 14 3.3 3.2 .10 .10 1. 2 .10 .1 0 .1

61 30 6. 6 12 3.0 3.2 .10 .10 o' 80 .10 0 7 14 8. .10 .10 .1 0 .1 8 14 11 6.3 2.6 3.6 .1C .10 10 .10 .1 0 .1 9 13 9. 4 7.0 2.8 8.9 .10 .10 10 .10 .1 0 .11 10 12 9. 1 9.4 2.8 13 .10 .10 10 .10 .1 0 .1

11 1 10 9. 1 5.3 2.8 13 .1C .10 1C .10 .1 0 .1 12 .B 8.0 8. 8 4.1 2.8 13 .10 .10 10 .10 .1 0 .1 13 .8 7.0 7. 7 11 2.8 12 .10 9.0 . 10 .10 .1 0 Jl 14 .B 6.6 7. 4 7.0 6.1 8.4 .10 4 , 10 .10 .1 C .1 15 .B 6.3 7. 4 5.8 11 7.7 .10 3 10 .10 .1 0 .1

16 .4 6.C 7. 0 5.8 11 7.0 .10 3 10 .10 .1 0 .11 17 .5 5.8 6. 0 5.5 9.B 7.0 .10 3 10 .10 .1 o 4 IS .1 5.8 5. 5 5.0 8.8 7.0 .10 3 10 .10 .1 0 .1 19 .3 5.5 5. 5 5.0 8. 7.0 .10 2 10 .10 .1 0 2& .20 12 10 5.0 8. 6.6 .1C 2 10 .10 .1 0 .1

21 .20 20 12 5.0 8. 6.6 .10 2 10 .10 .1 c .' 22 .20 17 9. 1 4.7 8. 3.8 .10 2 10 .10 .1 0 23 .20 12 8. 8 1.6 8. .10 .10 8.1 10 .10 .1 0 24 .20 11 8. 4 1.3 B. .10 .10 .10 10 .10 .1 o 4 25 .20 10 7. 4 3.5 B. .10 .10 .10 10 .10 .1 o .5 26 .20 10 6. 6 3.5 5. .10 .10 .10 10 .10 .1 J .1 .10 10 .10 .1 0 .10 10 .10 .1 i> 29 .20 9.1 5. 8 3.5 3. .10 .10 .10 10 .10 .1 0 30 .20 9.4 5. 5 9.3 .10 .10 .10 10 .10 .1 c 31 .20 5. 0 12 .10 .10 .10 .1 c

TOTAL 185.10 442.7 241. 7 204.7 169. 148.00 2.90 133.10 6. 30 3.10 3.1 0 3. MEAN 5.97 14.8 7.80 6.60 5.8 4.77 .097 4.29 21 .10 .1 0 MAX 11 45 1 2 15 1 13 .10 14 1 .2 .10 .1 0 MIN .20 5.5 5. 0 1.3 2. .10 0 .10 0 .10 .1 0 13 6.2 6. 2 6 t

10,470 SAN GABRIEL RIVER BASIN

11086300 SAN DIMAS CREEK BELOW SAN DIMAS DAM, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, KATER YEAR OCTOBER 196B TO SEPTEMBER 1969

AY MAR APR MAY JUN JUL AUG SEP

1 .10 IB .04 0 67 149 4C 24 30 15 .30 5.1 2 .10 17 .04 0 61 162 39 23 30 14 .30 5.1 I .10 17 -C4 .02 61 200 40 25 30 10 .3C 8.9 4 .10 11 .C4 .02 61 144 43 28 29 .30 11 5 0 .30 11

6 .10 .1C .04 7.3 145 0 6.4 10 7 .10 .10 .04 11 194 109 37 25 30 e 7.B 10 8 .10 .1C .04 11 30 7.1 10 9 .10 .10 .04 4 128 109 33 25 30 0 8.3 9.9 10 .10 .10 .04 3 70 1C9 43 25 30 0 6.2 9.9

.10 .10 .04 5 54 104 43 25 27 0 6.6 9.9 2 .10 .10 .04 7 5.8 9.9 3 .10 .10 .04 8 54 100 7.8 9.9 4 .10 . lu .04 7 54 81 39 25 28 0 6.5 .9 5 .10 .10 .04 5 54 53 28 25 28 C, 11 .9

6 .10 .10 .04 8.2 54 53 28 25 28 0 9.4 .9 T 8.2 .10 .04 .50 54 53 26 25 28 0 9.4 B 4 .10 0 9.4 9 5 .1C 0 9.4 5 .10 .04 4.6 54 68 35 25 31 0 9.4

1 8 . 0 .06 27 54 86 35 26 28 0 9.4 2 1 . C .06 200 64 73 32 27 28 0 9.0 3 I . 0 .06 289 130 57 33 30 25 0 9.0 4 1 . 0 .06 153 473 57 30 32 17 0 9.0 25 0 . C .40 1,720 1,250 51 28 29 15 0 9.0

26 0 . 0 .06 498 294 47 28 26 15 0 6.6 27 0 . 0 .06 445 286 47 28 26 15 0 .60 28 9 . 0 .06 100 309 47 29 25 15 0 .60 29 9 .10 .04 100 47 28 15 0 3.4 9 .10 .02 94 53 28 30 15 .30 5.5 8.5 31 8 .02 81 49 30 .30 5.1

EAN 8.70 2.19 .055 125 159 87.0 34.3 26.3 25.8 1.28 6.10 11.3 AX 21 18 .40 1,720 1,250 200 43 32 33 15 11 16 IN .10 .10 .02 0 54 47 24 23 15 0 .30 5.1

2,010 MIN 0 AC^FT 28,800

AY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .36 181 i .6 7.0 .81 13 1 4.0 3.8 1.3 .5 2 .36 .5 .8 7.0 11 7.1 1 3.9 3.4 1.3 .5 3 .45 .2 .5 7.0 14 8.3 .2 3.7 3.1 1.3 .4 4it .54 .0 .0 6.5 14 18 .0 3.5 2.8 1.3 .4 5 .54 .8 .0 6.5 14 14 .5 3.3 2.9 1.3 .4

6 .54 .0 6.5 14 26 .8 3.2 3.0 1.3 1.4 7 .54 .0 6.5 14 26 .8 3.1 3.1 1.4 1.3 8 .63 .0 4.6 14 25 .1 3.3 3.2 1.4 1.3 9 .63 .0 .7 ? 9.8 26 .8 3.6 3.3 1.5 1.3 10 .72 .6 .0 .7 I .90 24 .1 3.8 3.4 1.5 1.3

11 .81 .6 .0 .7 ? 8.3 21 .1 4.1 3.5 1.6 1.3 12 .81 .0 .7 I 17 21 .1 4.3 3.5 1.6 1.3 13 .72 .0 .7 2 17 21 3 4.5 3.4 1.7 1.3 14 .72 .0 .7 2 17 21 2 4.7 3.4 1.6 1.3 15 8.2 .0 .7 I 17 21 .6 4.5 3.3 1.6 1.3

16 23 .0 .9 D 16 21 .1 4.2 3.2 1.5 1.3 17 23 .6 .0 .9 3 16 21 .7 3.9 3.1 1.4 1.3 18 23 .3 .0 .9 3 16 21 .8 3.6 3.1 1.3 1.3 19 23 .0 .0 .9 3 11 21 .2 3.3 3.1 1.3 1.3 20 22 .0 . 3 .9 3 .90 20 .7 3.1 3.1 1.2 1.3

21 22 .0 .0 .9 .90 19 .2 2.8 3.0 1.3 1.4 22 16 .0 .8 .90 18 .7 3.2 3.0 1.4 1.4 23 16 .0 .B .90 17 .2 3.6 2.9 1.4 1.4 24 19 .0 .8 1.1 18 .7 4.0 2.B 1.5 1.4 25 20 .0 .8 1.3 16 .2 4.4 2.8 1.6 1.4

26 20 . 5 .0 .8 1.5 15 .7 4.8 2.8 1.7 1.4 27 20 .0 .8 1.5 12 .2 5.0 2.7 1.8 1.4 28 11 .0 .8 2.C 11 .7 5.2 2.6 1.8 1.4 29 15 .0 .8 11 .2 4.9 2.6 1.7 1.4 30 20 .0 .8 11 .1 4.5 2.5 1.6 1.4

45.8 40.8 MEAN 10.6 5 1.48 1.36 MAX 23 18 .0 7. 17 26 32 5.2 3.8 2 1.8 1.5 MIN .36 SAN GABRIEL RIVER BASIN 2*13

11086500 LITTLE DALTON CREEK NEAR GLENDORA, CALIF.

DRAINAGE AREA.--2.72 sq mi. PERIOD OF RECORD.--December 1938 to September 1968, October 1969 to September 1970. January 1929 to November 1938 at site 0.8 mile downstream; records not equivalent, as diversion was not included. GAGE.--Wate

AVERAGE DISCHARGE. --31 years (1938-68, 1970), 0.72 cfs (522 acre-ft per year); median of yearly mean discharges,! 0.3 cfs (220 acre-ft per year). EXTREMES. --Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water years 1966-68, 1970 are contained in the following table: Minimum Wtr yr Date Discharge G.H. Date 1966 Nov. 22, 1965 280 3.98 Long periods 1967 Dec. 6, 1966 325 3.17 Oct. 1 to NO.V. 5, 1,966 1968 Mar. 8, 1968 1.63 Many days 1970 Mar. 4, 1970 do.

COOPERATION.--Records furnished by Los Angeles County Flood Control District and ed by Geological Survey. REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

JUN JUL 1 0 4.2 14 2.7 .70 .50 2 o 3.8 9.6 2.4 .60 .50 3 0 2.9 8.3 2.2 .60 .50 4 0 2.8 7.5 2.C .60 .50 5 l) 2.7 6.7 2.2 .70 .50 6 C 2.7 6.2 5.8 .70 .30 7 0 2.6 5.8 7.3 .60 .30 8 0 2.4 5.4 3.7 . .90 .40 9 0 3.8 5.0 3.4 £ 1.1 .40 1C 0 2.B 4.6 3.4 l.fl .40 11 0 2.7 4.2 3.C .70 .40 12 C 3.4 3.8 3.0 .60 .40 13 0 2.4 3.6 3.0 .50 .30 14 0 2.3 3.5 3.0 .50 .30 15 C 2.3 3.4 3.0 .50 .30 16 C 2.2 3.2 3.0 .50 .50 17 7.4 2.1 3.1 3.0 .50 .50 18 4.4 2.0 3.0 3.0 .50 .30 19 .90 1.9 3.2 3.0 .50 .20 20 .50 1.9 2.2 2.7 .50 0

21 .40 1.9 1.7 2.4 0 .50 .10 22 48 1.9 1.6 2.4 0 .50 .10 23 41 1.9 1.7 2.4 0 .50 .10 24 22 1.8 2.0 2.4 0 .50 .10 25 22 1.7 1.7 2.4 0 .50 .20

26 H 1.7 2.0 2.4 0 .50 .20 27 7.4 1.7 2.0 2.4 0 .60 .20 28 7.1 1.7 2.0 2.2 0 .50 .10 29 5.5 38 2.2 0 .50 0 30 4.5 16 5.9 0 .70 0 31 15 3.0 TOTAL 0 182.10 137.2 132.1 83.8 6 35.00 18.60 8.60 MEAN 0 6.07 4.43 4.26 2.99 1 ) 1.17 .60 .29 MAX 0 48 38 14 7.3 0 2.0 1.1 .50 WIN 0 0 1.7 1.6 2.0 3 .70 .50 0 17

WTR YR 1966 TOTAL 657.80 MEAN 1.80 MAX 4B AC-FT 1,300 SAN GABRIEL RIVER BASIN

11086500 LITTLE DALTON CREEK NEAR GLENDORA, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEgT PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEPOER 1967

1 3 1.6 .80 2 0 .BC .BO 3 22 2.6 6.0 2.9 4.1 4.B 2.9 1.7 .BC .70 4 .BC .70 5 26 2.5 5.8 2.7 4.6 4.B 3.3 1.7 .80 .73 6 .5C 147 3.3 1.7 .80 .50 7 3.1 34 2.5 B .80 26 2.5 5.3 2.2 4.B 4.B 3.1 1.6 .90 .30 9 1- .4: 15 2.3 5.0 2.2 4.3 4.B 3.3 1.5 .90 .40 .20 11 .BC .4C 11 .2C 10 2.2 4.3 3.3 8.5 4.B 2.9 1.3 .ac .20 12 13 .10 7.0 2.2 4.1 12 4.1 4.8 2.9 1.5 .BC .3C .1C 6.0 2.2 4.3 7.B 4.1 4.8 2.5 1.3 .BC .10 15 .1C .7C .10

16 2.3 1.2 .7C , .10 17 .60 .1C 18 .1C 2.3 1.2 .60 .20 19 .1C 4.3 2.0 4.1 3.9 6.C 4.6 2.2 1.0 .60 .3C 20 .20 4.1 2.0 3.9 3.5 5.8 4.3 2.2 1.2 .3C 21 22 .20 3.6 10 3.3 3.5 14 .3 2.0 .90 .6L .40 23 .20 3.4 6.2 3.3 3.3 1C .1 1.9 1.0 .60 .30 24 .20 3.2 25 3.3 3.1 9.7 .7 1.9 1.2 .60 25 .20 3.2 25 3.5 3.1 8.8 .7 1.9 l.C .60 .30 26 .20 3.2 11 . 3.3 3. 1 27 .10 3.0 6.5 J.9 2.9 7.7 .3 1.9 1.2 .6C .60 28 .10 3.0 B.O 2-7. 2.9 7.7 .3 1.7 1.3 .60 29 .10 2.9 8.0 2.9 7.1 3C . IvJ 2.8 7.7 2.7 6._6 .9 1.9 1.5 .4» .60 31

TOTAL 0 21. 9C 12.10 MEAN 0 .26 2.49 1.36 MAX 0 3.1 147 25 7.4 12 14 5.8 3.3 1.9 1.6 .80 WIN 0 0 2.0 2.7 2.2 3.9 2.9 1.7 .80 .3; .10 AC-FT 0 16 752 328 246 225 372 272 146 84 43 24

AC-FT 2,510

DISCHAR GE, IN CU 1C FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1966 DAY OCT NOV 1 2 .40 .10 .80 .40 .50 .50 1.6 .20 .10 3 .40 .10 .6C .40 .40 .30 .70 .30 .10 4 .40 .10 .70 .4J3 .30 .30 .70 .30 .10 5 .30 .30 .80 .40 .3C .30 .60 .30 .20 6 .30 .30 .20 7 .30 .30 .60 .30 .30 2.0 .40 .33 .20 8 .23 9 .40 .20 .63 .30 . 7C 1.1 .20 .33 .20 10 .40 .20 .53 .30 .70 .90 .20 .33 .10 U 0 .6'- 12 .50 .20 .40 .70 1.4 .20 .30 0 13 0 14 .40 .30 .60 .40 1.2 1.1 .20 .20 0 15 .30 .30 .60 .40 .80 1.2 .20 .20 0 16 .30 .30 .70 .40 .70 1.1 .20 .20 0 17 .10 .30 .70 .50 .8C 1.1 .20 .20 0 IB .10 .30 2.0 .50 .80 .70 .20 .20 0 19 .10 11 1.8 .50 .80 .60 .20 .20 0 23 .10 2.1 .90 .40 .90 .60 .20 .20 0 21 .20 4.1 .80 .40 .80 .50 .20 .30 0 22 .33 1.6 .60 .30 .80 .30 .20 .30 0 23 .30 .90 .50 .30 .80 .30 .20 .30 0 24 .30 .60 .50 .30 .70 .20 .20 .20 0 25 .30 ..50 .50 .30 .70 .40 .20 .20 0 26 .10 0 27 .30 .50 .50 .90 .60 .40 .20 0 0 28 .30 .60 .50 1.2 .50 .30 .20 0 c 29 .30 .70 .50 .HO .50 .30 .20 0 c Si; .30 2.8 .40 .60 .30 .20 .10 0 31

TOTAL 9.70 30.20 21.60 13.93 19.70 30.00 11.50 6 .70 1.60 0 0 0 MEAN .31 0 0 MAX .50 U 2.0 1.2 2.0 9.4 2.2 .30 .20 0 0 0 M1N .10 .10 .40 .30 .30 .20 .20 0 0 0 c 0 AC-FT 19 60 43 28 39 60 23 13 3.2 0 c 0 .10 AC-FT 1,870 HTR YR 1968 TOTAL 144.93 MEAN . 40 MAX 11 MIN 0 AC-FT 287 SAN GABRIEL RIVER BASIN

11086500 LITTLE DALTON CREEK NEAR GLENDORA, CALIF.--CONTINUED

»Y DCT NOV tlEC J»N FEB MAR »PR M»Y JUN JUL

1 .30 .20 .2C .20 .1C 1 .50 .20 .30 .0 2 .30 .20 .20 .?3 .10 .0 .50 .25 .30 . 0 3 .30 .20 .20 .20 .10 .C .50 .20 .20 . 0 4 .3C .20 .20 .2C .10 1 .4C .20 .20 . 0 5 .30 .20 .20 .20 .20 1 .40 .3C .30 . 0

6 .20 3.0 .20 .20 .2C .0 .40 .30 .40 0 7 .2J .50 0

1C .20 .70 .30 1.0 5.0 .9 .20 .30 .80 0

4 .40 .40 .30 .30 .2 .1 .40 .20 .50 0 5 .40 .40 .30 .50 .0 .0 .40 .20 .50 0

6 .40 .43 .3' 1.0 .80 .90 .40 .20 .40 3 7 .40 .40 .30 .90 .70 .80 .40 .20 .30 0 .20 0

0 .30 .40 .30 .60 .50 .80 .30 .20 .20 0

.10 0 .10 0

6 .30 .20 .20 .10 .4C .60 .20 . 0 0 3 7 .20 .20 .20 0 .40 .60 .20 . 0 C 0 8 .20 .20 .20 0 7.8 .60 .20 . u 0 0

0 .20 .20 .20 0 .50 .20 . 0 0 3

»N .29 .51 .24 .35 I. OB ; .69 .31 . 8 .30 .016 X .40 3.0 .30 1.0 7.8 15 .5C . 0 .80 .10 N .20 .20 .20 0 .1C .50 .20 . 0 0 0 -FT IB 30 15 21 60 166 18 7 18 1.0

4C-FT 364 286 SAN GABRIEL RIVER BASIN

11086990 SAN JOSE CREEK NEAR EL MONTE, CALIF. LOCATION.--Lat 34 0 01'55", long 118°00'40", in El Monte Grant, Los Angeles County, ight bank of San Jose flood

RAINAGE AREA. --87. 8 sq ml.

ERIOD OF RECORD. --October 1964 to Septemb er 1970.

ty Flood

VERAGE DISCHARGE. --6 years , 32. 9 cfs C23, 840 acre-ft per ye ar).

1966-70 are contained in the following table:

Max! mum Minimum daily tr yr Date Dl scharge G.H. Date D ischarge 966 Dec. 29 1965 5,220 5.27 May 25 29, 30, June 3 , 1966 0 967 Jan. 24 1967 10,200 6.80 Oct. 9 1966 2.8 968 Mar. 8 1968 10,100 6.73 Oct. 19 1967 6.4 969 Feb. 25 1969 9,710 6.79 Jan. 5 1969 9.3 970 Mar. 4 1970 3,930 4.59 Aug. 31 Sept. 2, 1970 9.0 , 10,200 cfs Jan. 24, 1967 (gage height, 6.80 ft, from outside gage); no flow at times in some year

EMARKS.--NO regulation abo gage -height recor d Mar. 6 to May 27, 1970. One small diversio above Spadra and at Lemo n Str eet. Bypa ss to the original San Jose Creek channel has bee n closed since Oct. 1, 1964. See schematic diagram of San Gab rlel and Los Angel es River basins elsewhere In th Is report.

T

1 4.2 2.8 6.5 15 7.9 7.1 3 3.6 3.6 7.1 7.1 4.6 5.8 4.6 3.7 C 3.2 4.1 3.2 4 3.6 1.1 7.1 7.7 4.6 5.8 3.2 2.8 1.4

6 2.6 3.1 8.3 8.3 390 6.5 4.6 3.7 1.4 3.7 2.8 1.4 7 3.1 3.1 T.I 8.3 24 5.8 4.1 3.7 3.2 3.7 2.8 .50 B 2.8 3.4 7.1 5.8 12 5.8 4.1 4.1 1.8 3.7 4.1 3.7 9 2.8 3.4 54 5.8 10 2.8 3.9 101 8.3

1 2.8 3.9 17 8.3 7.7 5.8 4.1 5.2 4.1 2.8 5.2 2.8 2 3.4 4.2 101 8.3 8.3 5.8 4.1 4.6 3.2 4.6 4.6 1.0 3 3.1 4.2 17 8.9 T.7 5.2 4.1 5.2 2.8 5.2 3.2 3.2 4 3.4 49 47 8.9 7.T 5.2 4.1 4.6 4.1 4.6 3.2 5.8 5 3.4 127 22 8.3 6 2.3 349 14 T 2.6 245 10 T.I 6.5 4.1 3.2 7.1 8 2.8 57 9.6 8.3 7.1 4.1 3.7 1.8 7.7 4.1 3.2 7.1 9 2.3 7.8 8.3 8.3 7.7 4.6 4.1 .50 7.1 3.7 4.6 11 4.6 4.1 3.7

2 2.1 1,410 8.9 3 2.6 501 T.T 7.7 7.1 .90 4.1 1.4 10 3.7 3.2 7.1 4 2.6 354 7.1 8.3 5.8 12 4.6 l.B 10 3.7 2.8 5.8 5 2.8 122 6.5 8.3 7.T 46 5.2 0 7.1 4.1 2.8 6.5 6 3.1 11 6.5 8.3 7.1 12 4.6 .90 7.1 4.1 3.2 4.6

9 2.6 7.1 1, 640 8.9 5.2 1.4 0 5.8 4.1 4.1 6.5 0 2.6 7.7 94 187 5.2 3.7 0 5.2 4.6 4.6 5.8 1 2.6 24 17 141.10 4. TO X 4.5 1,410 1,640 187 390 46 5.8 6.5 10 5.2 5.8 11 N 2.1 2.8 6.5 5.8 4.6 .90 1.4 0 0 1.4 2.8 .50 253 182 300 237 230 280 .5 AC-FT 20,020 SAN GABRIEL RIVER BASIN

11086990 SAN JOSE CREEK NEAR EL MONTE, CALIF.--CONTINUED DISCHARGEi IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 JUN JUL AUG SEI

1 4.6 4.6 2 8.7 14 13 172 10 12 9.3 8.5 11 ? 5.2 7.1 7 8.7 14 14 46 12 12 10 8.5 1' 3 5.2 7.1 8 4 8.7 15 12 8.5 11 11 9. 8.9 i: 4 5.2 8.3 4 9.1 12 23 27 10 11 8. 8.9 I) 5 5.8 8.3 1,3 0 10 12 12 12 10 10 9. 9.3 i: 6 5.2 8.3 1,2 0 11 12 11 10 9.3 1C 10 8.9 i: 7 4. I 5 13 10 11 12 11 118 8.9 9.3 1C 9.3 12 8 4.1 )5 8 11 12 12 13 11 10 9. 10 12 9 2.8 4 4 11 12 12 10 13 10 8. 9.3 1 13 11 4 0 10 12 13 11 16 11 9. 8.9 i: 11 8.3 3 7 10 11 58 199 10 1C 8. 9.3 12 12 7.1 3 0 10 11 50 12 9.3 12 8. 8.9 I! 13 5.8 4 9.1 11 11 161 11 9.3 13 8. 10 i; 14 5.2 5 9.1 12 12 44 10 8.5 11 8. 10 1 15 T.7 4 9.1 10 11 11 10 8*9 . 9.3 8. 9.3 11 16 5.8 4 9.1 8.7 12 11 10 8.9 10 8. 9.3 1 17 4.6 6 9.1 11 12 10 10 10 1C 8. 9.3 1 18 3.7 4 7.8 9.6 12 11 138 8.9 1C 8. 8.9 i; 19 3.2 4 6.6 9.1 12 10 12? 8.9 9.3 8. 9.3 i; 20 2.8 4 8.3 10 12 9.3 17 8.9 9.3 8. 8.9 i; 21 3.2 4 9.1 10 12 10 274 8.9 10 8. 10 1. 22 3.2 4 9.1 772 9.3 1C 266 8.9 9.3 8. 11 U 23 4.1 9 9.6 360 11 10 17 .3 1C 8. 11 1 24 4.1 8.3 B.7 2,290 8.5 9.3 58 .3 9.3 8. 11 i; 25 4.6 8.9 8.3 158 11 1C 12 .3 8.9 8. 11 1, 26 4.1 8.9 14 25 12 10 12 9.3 9. 11 li 27 4.1 9.6 9.6 18 12 11 11 9.3 8. 11 i; 28 4.6 12 9.6 20 12 10 IB 10 8. 12 I 11 15 12 12 30 5.2 2 9.1 22 12 10 9.3 B. 11 li 9.6 27 114

MEAN 4.87 34.0 125 126 11.8 23.4 55.3 0.2 1C. 2 8.84 9.93 12.: MAX 11 593 1,310 2,290 15 161 274 16 13 10 13 li M[N 2.8 4.6 6.6 8.7 8.5 9.3 8.5 8.5 8.9 8.1 8.5 11

MIN 0 AC-FT 13,990

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTO )ER 1967 TO SEPTEMBER 1968

JUN JUL AUG SE!

1I 112 7. 14 13 11 9.3 75 B. 8.9 8. 8.5 10 2 121 8. 11 14 11 9.3 44 8. 8.9 9. 7.7 10 3 101 8. 9.3 16 11 9.3 10 9. 8.9 9. 8.1 10 4 101C! 8. 8.9 10 11 9.3 9. 9. 9.3 8. B.5 10 5 191 9. 8.5 11 11 9.3 a.8. 8. 8.9 9. 8.1 9.: 6 1 10 8.5 11 11 33 8. 8. 10 8. 8.5 10 7 U 9. 8.9 9.3 10 148 8. B. 11 8. 11 10 8 1C 8. 11 10 10 2,180 8. 8. 8.9 9. 8.5 12 9 1 9. 8.1 10 17 19 9. 8. 8.9 9. 8.9 12 10 1C 8. 7.7 11 13 14 9. 8. 8.9 8. 8.9 12

1 1 8. 7.7 20 6.8 14 10 8. 8.9 8. 10 10 2 1 9. 8.1 11 6.8 13 9. 8. 8.5 9. B.9 9.; 3 1( 8. 8.5 11 78 38 8. 8. 8.9 8. 9.3 9.: 4 .9 10 8.5 10 52 16 8. 8. 8.9 8. 8.1 10 5 .5 10 8.9 10 11 13 8. 8. 8.9 8. 9.3 10 16 .1 10 8.9 12 10 15 8. 7- 8.9 8. 10 10 17 .7 9. 9.3 9.3 10 16 7. 7. 10 7. 8.9 10 IB .8 11 720 8.9 10 14 8. 7. 8.5 8. 9.3 12 19 .4 592 210 9.3 9.3 18 7. B. 8.5 8. 8.9 12 20 .8 349 15 10 9.3 12 7. 8. 8.5 8. 8.5 12 21 .2 583 8.9 10 9.3 12 7. 8. 8.9 7. 8.9 12 22 .8 13 10 10 9.3 12 8. 8. 10 8. 8.9 13 23 .2 11 10 10 9.3 12 8. 8. 9.3 8. 8.9 12 24 .2 9. I 10 10 9.3 12 8. 8. 8.5 8. 8.9 11 25 .7 8. > 10 10 9.3 12 8. 8. 8.1 8. 9.3 12 26 .1 8. 2 9.3 9.3 12 8. B. 8.5 8. 9.3 12 27 .3 8. 0 101 ID 12 8. B. 8.9 7. 9.3 12 28 .3 8. 0 41 10 12 8. 8. 8.9 21 9.3 12 29 .9 8. 1 15 9.3 12 8. 9. B.9 10 11 9.3 30 f .1 313 3 15 12 8. 8.9 7. 12 12 31 f . l . 4 38 12 8. 11 -

MEAN 8 MAX 9. U 2 12 13 MIN AC-FT 48 4,12 SAN GABRIEL RIVER BASIN

11086990 SAN JOSE CRELK NEAR EL MONTE, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AL G SE

1 12 12 12 12 21 113 18 15 14 14 C 2 12 12 12 13 18 41 27 15 15 13 C 3 18 12 12 13 19 1 66 15 5 14 c 4 11 12 13 12 18 1 18 IS 4 13 1 5 11 11 13 9.3 294 I 59 15 5 13 1

6 11 1C 13 10 1,010 1 22 20 5 13 3 7 12 10 13 12 59 1 18 IS 4 14 3 8 11 12 12 12 39 7 18 14 4 14 4 9 11 10 13 12 30 6 18 14 4 13 4 10 11 11 12 12 25 1 2 23 14 13 14 4 11 12 11 16 11 19 36 19 14 14 17 3 12 11 12 12 11 21 33 19 14 14 8 3 13 12 12 12 152 21 33 19 14 11 3 3 14 12 12 12 378 19 30 19 14 11 1 3 15 12 71 12 16 375 23 19 14 13 3 3

16 12 16 31 11 85 19 19 15 13 3 3 17 12 12 12 11 19 18 19 15 17 4 3 18 12 12 12 116 171 17 19 15 21 11 4 19 13 13 13 313 99 19 19 15 14 11 4 20 13 13 22 1,400 44 22 19 17 15 13 5 21 13 12 11 927 33 123 9 17 15 13 5 22 13 14 11 137 385 23 9 17 15 11 5 23 13 12 17 15 13 5 24 13 12 12 1,540 1,930 21 7 18 18 13 5 25 14 12 196 4,370 2,840 20 7 15 17 11 5

26 14 12 86 829 213 19 7 14 17 11 5 27 13 12 14 170 116 19 7 14 17 11 5 26 13 11 13 179 175 19 6 15 17 11 5 29 16 11 13 41 19 6 15 15 11 5 30 40 12 13 37 18 6 15 14 11 5 31 13 12 33 14 11 7 1 53 MEAN MAX 40 71 20 21 18 7 2 MIN 11 10 11 9.3 IB 17 16 14 11 11 0 1 5 1,06

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 NOV DEC JAN FEB

MEAN MAX MIN

WTR YR 1970 TOTA.L 10,345.0 MEAN 28.3 MIN 9.0 AC-FT 20,520 SAN GABRIEL RIVER BASIN

11087020 SAN GABRIEL RIVER ABOVE WHITTIER NARROWS DAM, CALIF.

of Whittler Narro Da and 1.8 miles south of El Monte DRAINAGE AREA.--353 sq mi. PERIOD OF RECORD.--October 1955 to Septe 1957, October 1963 to September 1970. GAGE.--Water-stage recorder. Altitude o ge is 220 ft (from topographic map).

Wtr yr Date harge charge 1966 Nov. 23, 1965 1,600 7.08 Oct. 3-13, 19 65 1967 Jan. 24, 1967 7,300 8.25 Oct. 27, 1966 1968 Mar. 8, 1968 4,200 7.85 Oct. 25, 1967 1969 Jan. 25, 1969 6,600 10.90 Jan. S, 6, 19 69 1970 Mar. 4, 1970 6,120 6.62 Sept 3, 1970

eriod of record: Maximum discharge, 46,600 cfs Jan 25, 1969 (ga e height, 10.90 ft); no flow for p years.

.--Record reservoirs (co

OCT MOV JUL AU G S

I 6.3 .60 162 1,350 17 71 52 146 114 2.4 3. 0 2 1.0 1.3 146 1,070 69 71 52 146 114 1.8 3. 0 3 0 2.1 174 832 87 71 52 146 114 1.8 3. 0 4 0 2.4 226 912 118 71 52 146 114 1.8 2. 4 5 0 2.1 220 960 118 71 52 135 114 1.8 2. 4

6 0 2.4 232 8C9 714 74 52 85 114 2.1 1. b 7 0 2.4 290 510 34 . 9C 52 46 101 2.1 2. 1 8 0 2.4 290 250 11 122 52 118 39 2.1 2. 7 9 0 38 449 140 31 131 52 131 127 1.8 20 10 0 114 263 157 118 140 52 122 118 1.5 42

11 0 146 87 220 127 140 52 114 1C6 1.8 22 12 u 112 246 208 122 140 52 114 106 3.0 24 13 0 2.7 78 196 122 135 35 114 106 3.5 10 14 34 128 150 250 122 52 31 114 106 5.0 8. 0 15 90 344 106 250 118 10 75 110 106 3.0 8. 0

16 122 939 97 268 122 5.5 5.C 114 106 3.5 1C 17 131 550 78 263 122 5.0 5.0 HO 106 5.0 9. 0 18 131 108 1 282 114 3.0 5.0 110 106 4.5 12 19 131 23 .5 4.0 13 20 131 90 1 282 106 3.0 5.0 110 106 3.5 15

21 135 93 7 266 106 3.0 5.0 114 106 4.0 18 22 135 2,360 8 214 106 2.4 5.0 114 106 3.5 20 23 114 6,480 7 208 90 4.9 5.0 114 60 3.5 22 24 101 6,350 7 220 71 198 5.0 114 10 3.5 22 25 90 3,130 7 298 74 109 37 114 5.0 4.0 22

26 93 1,610 7 242 74 52 22 114 3.0 4.0 24 27 106 186 7 91 74 152 31 122 2.5 4.0 24 28 118 244 4 18 71 157 31 118 2.4 4.0 22 29 94 214 2,54 14 16? 35 114 1.5 4.0 35 30 .80 190 721 526 162 1 40 106 2.4 4.0 142 31 .30 1,620 56 162 110 4.0 244

MEAN 3.18 26. 1 MAX MIN 0 .60 3.5 14 11 2.4 5.0 46 1.5 1.5 1. 5 1 4,820 (t ) 13,970

WTR YR 1966 TOTAL 66,436.00 MEAN 182 MAX 6,480 WIN 0 AC-FT 131,800 t 72,830 SAN GABRIEL RIVER BASIN

11087020 SAN GABRIEL RIVER ABOVE WHITTIER NARROWS DAM, CALIF.--CONTINUED

DAY JUN JUL AUG SEP

1 57 135 97 13 23 90 233 93 11 8.0 8.0 101 2 57 122 134 14 34 90 100 93 7.0 8.0 7.0 14 3 57 135 1,690 12 51 93 16 93 7.0 8.0 7.0 9.G 4 6? 135 25 16 41 110 144 93 7.0 8.0 8.C 9.0 5 68 131 2,730 12 54 101 50 110 7.0 8.0 8.0 9.0 6 68 132 2,530 9.0 79 74 152 135 7.0 8.0 7.0 8.0 7 68 1,270 358 9.0 20 9.0 214 16? 7.0 8.0 9.0 7.0 a 62 117 97 8.0 35 10 45 120 7.0 9.0 10 7.0 9 62 10 140 8.3 78 10 127 78 7.0 8.0 9.0 6.0 10 90 6.0 12? 9.0 70 10 131 81 8.0 7.0 8.0 6.0

11 74 26 131 11 73 102 363 59 8.0 7.0 7.0 6.0 12 62 114 152 11 74 79 26 51 8.0 6.0 6.0 7.0 13 57 118 104 17 74 278 131 51 11 6.0 7.0 7.0 14 31 122 97 54 75 79 152 51 11 6.0 9.0 7.0 15 31 122 110 59 75 14 127 39 8.0 7.0 8.0 6.0

16 35 127 114 62 80 12 127 13 7.0 7.0 8.0 6.0 17 35 118 122 65 80 12 135 12 6.0 7.0 9.0 6.0 18 46 118 122 74 78 11 294 11 6.0 6.0 8.0 7.0 19 46 12? 127 78 78 185 10 6.0 6.0 8.0 7.0 11 ID" 20 46 95 114 78 76 11 33 7.0 7.0 7.0 6.0 21 46 29 114 67 78 11 385 9.0 7.0 8.0 7.0 6.0 22 46 136 85 1,290 77 10 474 9.0 7.0 8.0 8.C 6.0 23 46 118 74 803 80 44 24 9.0 7.0 8.0 7.0 7.0 24 74 114 57 3,590 7? 93 125 9.0 7.0 8.0 8.0 7.0 25 2.7 106 62 231 20 13 22 9.0 7.0 9.0 8.0 7.0

26 1.3 97 7B 40 11 10 31 9.0 7.0 11 8.0 8.0 27 .80 97 46 33 12 10 72 9.0 8.0 10 8.0 13 28 47 97 47 84 90 63 148 9.0 10 7.0 8.0 15 29 46 93 40 84 46 66 10 10 8.0 8.C 14 30 40 97 38 57 131 90 13 8.0 8.0 6.0 14 31

MEAN 132 140 315 224 78.1 59.6 141 47.6 7.70 7.65 7.77 11.3 MAX 11 11 10 101 MIN .80 6.0 1? 8.0 11 9.0 16 9.0 6.0 6.0 6.0 6.0 (t> 10,360 7,700 464 7,050 1,360 0 3,480 6,530 80

t COLOR

DISCHARGE , IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEM BER 1968 DAY OCT NOV DEC JAN FEE MAR APR MAY JUN JUL AUG SEP

1 13 7.0 16 11 10 9.0 146 U 5.5 9.0 84 90 2 14 7.0 10 11 9.0 9.0 76 11 5.5 9.0 84 90 3 10 8.0 10 36 9.0 9.0 16 11 5.5 9.0 84 90 4 6.0 .0 15 10 9.G 9.0 14 11 6.0 9.0 84 90 5 6.0 .0 9.0 10 9.0 9.0 13 11 6.0 9.0 81 93 6 6.0 .0 9.0 10 9.0 38 13 11 7.0 9.0 84 93 7 6.0 .0 10 10 9.0 227 13 11 12 8.0 97 90 8 6.0 .0 16 10 10 3, 550 12 11 10 9.0 84 87 9 6.0 B.O 1C 11 33 26 12 11 10 10 B4 90 U 6.0 7.0 8.0 11 26 13 12 U 10 10 84 90 11 6.0 8.0 10 31 12 10 12 10 10 10 B7 90 12 6.0 8.0 12 11 10 10 12 10 1C 10 87 90 13 6.0 7.0 10 11 247 43 12 16 10 10 87 90 14 6.0 9.0 15 11 105 22 12 9.0 10 10 87 90 15 6.0 9.0 16 10 13 14 12 9.0 10 10 87 87 16 6.0 9.0 11 12 10 14 12 9.0 1C 9.0 90 87 17 6.0 9.0 11 11 10 26 11 8.0 1C B.O 87 87 18 5.5 9.0 1, 230 11 10 3 11 8.0 1C 9.0 87 87 19 5.5 1,140 346 It 10 8 11 8.0 1C 9.0 87 87 20 5.5 565 22 11 11 3 11 8.0 11 7.0 87 90 21 5.5 1,390 13 11 11 3 U 7.0 11 6.0 87 90 22 5.5 29 14 11 11 3 11 7.0 11 6.0 87 90 23 5,5 15 13 11 11 3 10 7.0 11 7.0 87 87 24 5.5 12 11 11 10 4 10 7.0 10 w 71 87 90 25 5.0 14 10 11 10 4 11 7.0 9.0 84 87 90 26 5.5 13 10 10 10 14 11 7.0 9.0 84 87 93 27 8.0 13 9.0 163 U 15 11 7.0 9.0 87 87 97 28 8.0 22 9.0 44 9.0 15 10 5.5 8.0 103 90 97 29 8.0 11 10 13 9.0 13 10 5.5 8.0 90 90 90 30 7.0 638 11 10 12 11 5.5 8.0 84 93 87 31 11 34 84 93

MEAN 6.71 134 61.8 19.0 22.9 136 18.3 8.71 9.08 28.7 87.0 90.0 MAX 14 1,390 1,230 163 247 3,550 146 11 12 103 97 97 MIN 81 87

0 0 0 2,110 (t) 0 0 0 0 0 0 0 0 0 1,700 6,240 6,050 t 0

t COLORADO RIVER WATER, IN ACRE-FEET, RELEASED TO SAN GABRIEL RIVER AT SITE 4.2 MILES UPSTREAM. t WATER FROM PUDDINSTONE RESERVOIR, IN ACRE-FEET, RELEASED DOWN WALNUT CREEK TO SAN GABRIEL RIVER. SAN GABRIEL RIVER BASIN

11087020 SAN GABRIEL RIVER ABOVE WHITTIER NARROWS DAM, CALIF. - -CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 196B TD SEPTEMBER 1969

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JJL AUG SEP|

1 87 15 9.0 9.0 329 6,130 65 74 31 16 18 20, 2 87 36 9.0 8.5 22| 3 in 11 0 B.O 22 4 90 9.0 0 7.0 390 421 179 51 27 20 20 24| 5 87 22 0 6.0 2,130 409 503 48 35 18 22 24| 6 87 48 0 6.C 8,160 314 431 71 31 18 24 24 7 81 71 0 7.0 5.08C 565 411 65 27 20 26 24 a 65 93 0 8.0 22 9 59 90 C 8.0 10 59 93 C 9.0 1,870 1,960 431 57 31 22 27 24 11 62 93 3 8.0 202 12 62 87 0 8.0 184 1,270 282 35 22 27 26 27 13 59 40 0 164 184 14 59 11 0 592 265 1,290 282 62 20 22 27 27 15 62 93 0 15

16 59 22 3 10 17 59 11 0 10 244 569 27 ( 1 29 33 24 27 18 59 10 31 27 35 19 62 34 0 490 584 110 26 1' 27 24 26 46 20 62 87 2 2,990 442 110 24 9 22 22 26 40

21 59 101 0 2,090 454 480 22 5 20 20 27 38 22 24 4 20 24 27 35 131 22 4 31 26 27 33 24 10 20 1 35 26 20 27 25 9.0 1 29 22 20 27 26 9.0 1 26 22 22 26 27 9.0 9.0 12 13,300 14,900 57 84 0 26 22 22 27 28 8.0 9.0 11' 10,700 14.50C 71 81 1 22 24 22 27 29 28 9.0 10 319 71 78 9 22 22 22 27 30 127 9.0 9.0 290 68 74 3 20 18 22 27 31 699 736 837 MEAN 58.5 MAX 127 1C6 275 24,800 22,900 6,130 503 81 35 33 27 46 MIN 8.0 9.0 9.0 6.0 184 57 20 29 20 16 18 20

(t) 3,300 7,100 6 910 2,680 0 0 0 0 0 C 0 0

WTR YR t COL M.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 191 D DAY OCT NOV JUl AUG SEP

1 27 122 0 8 84 1,460 51 54 87 6" 93 4 2 27 118 0 8 84 496 51 51 87 6E 97 2 3 27 118 0 8 84 38 68 51 87 B 97 9.0 4 26 122 0 8 84 706 62 51 87 8 78 0 5 26 101 7 8 84 464 59 51 87 8 81 ,5 6 24 668 3 8 84 84 62 54 87 8 81 ra 7 24 467 3 a 84 57 59 54 87 8 81 ra 8 26 31 lOt 78 81 51 20 54 87 78 'a 9 120 48 15 59 84 78 i 10 48 18 59 87 78 4 11 27 84 4 12 14 13 26 101 4 14 26 106 84 61 24 51 65 68 84 8 93 4 15 26 1C6 84 83 27 48 66 74 84 8 93 f 4

16 33 106 84 355 24 48 65 74 84 8 93 4 17 87 1C6 84 55 22 48 20 74 90 8 90 0 18 84 101 84 31 38 27 27 78 84 6 93 3 19 84 101 84 31 68 22 65 81 81 8 93 3 20 84 97 84 31 68 24 71 87 78 8 93 3 21 84 93 84 31 68 93 2 22 87 87 101 31 65 24 87 18 78 8 93 6 23 87 84 84 74 68 24 87 16 81 8 90 6 24 90 81 84 40 68 24 78 15 68 8 90 4 25 90 84 84 29 71 93 6 26 87 84 90 31 71 24 65 87 65 8 93 3 27 93 84 81 78 71 26 65 87 62 8 93 3 28 101 84 81 87 1,020 51 51 87 65 9 93 3 29 122 84 81 84 57 51 87 65 9 93 3 30 122 84 81 84 72 52 87 65 93 4 31 81 84 90 9

MEAN 59.6 118 81.8 74.9 143 139 52.8 61.5 80.5 85. 88.1 >2.1 MAX 87 87 97 9 97 93 MIN 24 26 27 29 22 22 15 15 62 6 51 9.0 100

CAL YR 1969 TOTAL 250,418.5 MEAN 686 MAX 24,800 MIN 6.0 AC-FT 496,700 t 35,400

t COLORADO RIVER WATER, IN ACRE-FEET, RELEASED TO SAN GABRIEL RIVER AT SITE 4.2 MILES UPSTREAM. 292 SAN GABRIEL RIVER BASIN

11087100 RIO HONDO FLOOD-FLOW CHANNEL AT WHITTIER NARROWS DAM, CALIF. LOCATION,--Lat 34°01'27", long 118°04'10", in La Merced Grant, Los Angeles County, on upstr

Montebello. PERIOD OF RECORD.--Oc ark).

G.H. 1965 203.54 1967 204.35 1908 204.00 1969 1970 198.30 , prob< bly o while gage 25 to 0900 ho for

RH1ARKS.--Re rds po

DISCHftRGEt IN CUBIC FEET PER SECOND, WftTER YEW OCTOBER 1965 TO SEPTEMBER 1966 ftUG SEP

1 0 44 1,080 2 0 27 809 3 C 33 677 4 C 96 713 ^ 0 88 757

6 0 95 682 7 G 17? 497 8 3 175 136 9 ., 230 45 10 G 293 41 1 0 1.3 98 2 0 125 84 3 'J 55 59 4 .10 60 36 5 .10 20 36

6 237 28 68 7 444 2.B BO B 132 0 75 9 0 0 92 o a 0 85 1 0 0 168 2 1.81C 0 96 3 5,650 0 93 4 7,160 0 96 5 2,810 C. 190

6 1,470 0 169 7 dB 0 6.7 . 8 87 0 .30 9 78 2,340 0 d 71 608 C 1 1,340 0

AN 0 663 188 246 0 X 0 7,160 2,340 1,080 0 N 0 0 J 0 0 SAN GABRIEL RIVER BASIN

11087100 RIO HONDO FLOOD-FLOW CHANNEL AT WHITTIER NARROWS DAM, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

29 C 0 30 0 0 31 5 a ______

TOTAL 0 C 218 2,673 0 0 0 MEAN 0 0 7.01 86.2 0 0 0 MAX 3 0 148 2,650 C 0 C MIN 000 0 0 0 0 AC-FT 0 0 432 5,300 C 0 0

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

NOV DEC JAN FE8 MAR APR HAY JUN JUL

7.6 6.9 6.2

1.6 5.0 7.0 7.* 7.*

8.6 5.7 8.6 5.7 9.2 5.7

5.7 9.6 5.7 0 877 9.6 2.4 568 290 8.9 302 30 9.6

12.8 14.3

7.0 .20 SAN GABRIEL RIVER BASIN

11087100 RIO HONDO FLOOD-FLOW CHANNEL AT WHITTIER NARROWS DAM, CALIF.--CONTINUED DISCHARGE, IN CUBIC FFET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

6 D 2.93C 0 7 P 1,500 0 8 0 3,860 C 9 0 4,230 0 13 0 1,890 J

1 0 120 0 2 0 89 0 3 0 89 0 4 n 155 0 5 0 ?98 0

6 C 186 0 7 0 146 0 9 0 467 0 9 0 517 0 C 273 48? C

1 90 323 0 2 0 912 0 3 0 2,620 C 4 380 6,010 0 5 11,700 13,400 0

6 14,600 1C, 500 0 7 6,500 7,730 0 8 7,560 7,250 0 9 14 0 0 0 I 0

T TAL 000 41,134.8 65,910 1,528 0000 K AN 000 1,327 2,354 49.3 0000 M X 0 C 0 14,600 13,400 1,410 0000 M N 0 C u 0 12 0 0000 A -FT 0 C .? 81,590 130,700 3,(J3C 0000

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

DAY OCT NOV DEC JAN FES MAR APR MAY JUN JUL

I .96

31

TOTAL 6.86 MEAN .22 MAX 5.9 MIN AC-FT

i,, 600 MIN 0 AC-FT 215,400 SAN GABRIEL RIVER BASIN

Dunty, on right levee 460 ft

2, to Aug. 9, 1968, at site 0.5 m RAINAGE AREA. --447 sq mi

River above station. Records since 1954 not equ ivalent.

9.05 ft lower.

1966-70 are contained in the following t able: Minimum daily tr yr Date Dis charge G.H. Date Discharge 966 Feb. 6, 1966 2,670 7.83 Short periods 0 967 Jan. 23, 1967 5,680 9.58 Oct. -27, 1966 .3d 968 Nov. 21, 1967 a222 Oct. 16-22, 1967 3.2 969 Jan. 26, 1969 11,700 7.82 Nov. 18, 1968 15 970 Mar. 4, 1970 5,530 5.36 Sept. 3, 1970 13 a Maximum daily.

Period of record: ' ' 1939 (combined capacity, 46 sed) , Mo rvoir since 1934 (capa city, 35,000 acre-ft). Santa vo?r sa ince fjctorblr 36,800 acre-ft) , Whitt ier Narrows flood-cont

site 6.7 miles upstrea lenish- ment (see station 11087020). See schema tic diag this report. Survey.

EVISIONS (WATER YEARS) .- -WSP 881: 1937. NSP 1928: Draina ge area.

DISCHAR GE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

AY OCT NOV JUN JUL AUG SEP 1 0 9 172 14 62 157 139 10 3 15 84 2 P 8 116 73 62 154 139 9 0 12 78 3 0 8 119 87 62 143 136 9 0 12 78 4 0 8 122 132 68 136 116 9 .10 12 90 5 0 8 125 125 68 132 119 9 0 14 96 6 0 B 122 916 75 136 88 9 C 14 102 7 0 8 119 47 102 119 23 8 7.2 13 102 B 0 8 112 13 139 119 122 2 17 4.7 102 93.8 9 109 23 161 119 116 11 16 0 106 13 0 9 9 96 136 176 125 125 11 16 l.l 102 1 0 11 9 96 116 157 125 129 9 13 .10 99 2 0 13 9 93 116 146 129 122 9 13 .10 99 3 0 .8 8 93 109 143 136 112 10 13 0 109 4 8.7 4 8 106 112 62 136 112 12 13 0 1S2 5 84 22 8 119 116 5.4 74 129 11 13 0 112 6 109 176 8 109 125 1C 2.0 129 10 13 0 106 7 119 168 7 93 129 17 1.5 112 11 11 0 99 8 11? 112 50 84 125 20 1.4 106 10 5.1 0 90 9 119 28 21 81 119 20 1.7 116 11 0 0 102 0 119 64 5.3 78 112 21 1.7 125 11 0 0 109 1 119 78 81 72 112 21 1.8 129 10 0 0 102 2 119 246 112 68 122 16 4.6 129 8 0 0 96 3 99 204 84 72 102 .80 15 122 6 0 0 1C6 4 106 207 78 72 72 195 16 109 i.4 0 0 99 5 84 139 78 78 78 118 23 112 .20 0 93

6 87 132 78 78 75 26 120 112 .70 0 0 93 7 96 102 75 64 64 139 120 119 .20 a o 93 8 106 106 67 36 64 146 132 99 .10 0 0 93 9 106 93 211 6.5 136 129 93 .10 6.5 18 90 0 0 90 108 417 139 129 96 () 18 93 87

112 N 00 5.3 6.5 13 .80 1.4 23 000 78 500 383 415 5,790 1108751)0 SAN GABBIEL RIVER

NO, W4TEX YE4R OCTOBE R 1966 TTJ otricnocccnrcunc

D4Y QCT NOV DEC JAN FEB MAR APR M«Y JUN JUL 4UG StP

1 8 119 78 30 25 7B 229 112 .8 4.'_ 15 2 8 90 120 3C 16 67 162 112 .9 4.C 25 3 13 116 1.64C 27 19 90 a. 8 99 .9 4.' 11 4 14 109 2R 30 29 1C8 120 96 .0 4.? 12 ^ 14 1J6 2,270 ?4 39 90 44 111 .0 4.4 12

6 11 93 2,240 .1 4.6 9.0 7 12 1,430 522 205 .1 4.8 8.4 B 11 151 94 9.7 41 28 41 144 6.2 5.L 8.4 3 12 4.1 141 9.5 99 27 119 45 6.2 5.? 8.4 1. 15 12 Iu6 J.3 84 2C 12? 68 6.3 5.4 8.4

11 13 31 106 9.1 66 8 452 64 6.4 5.3 B.4 12 12 129 154 8.8 68 5 23 44 6.4 5.2 8.4 13 11 146 96 22 64 3C 128 36 6.5 5.1 8.4 1* 9 143 80 59 66 11 154 26 6.2 5.C 8.4 15 9 143 82 78 75 1 122 28 5.9 4.8 8.4

16 10 146 109 75 87 .3 146 17 5.6 4.7 8.4 17 9 122 12P 75 90 1 150 13 5.3 4.5 8.4 ia 11 1C2 116 78 93 2 375 9.3 5.0 "4.34.4 8.4 19 336 9.3 2' 11 112 116 81 87 2 4.7 8.4 11 92 90 90 84 ? 38 9.3 4.4 4.1 8.4

21 12 11 88" 64 87 2 354 9.2 9.0 4.4 4.C 8.4 22 11 96 80 1 ,250 93 2 489 8.0 4.3 3.9 8.4 23 11 109 84 821 99 4 26 9.0 7.7 4.2 3.6 8.4 24 7 9 57 472 87 11 131 8.9 7.4 4.1 3.7 8.4 25 .2 9 62 472 15 2 18 8.8 7.0 4.0 3.7 8.4

26 .50 7 7R 45 7.6 .3 28 8.8 6.7 3.9 3.6 8.4 27 .30 6 7 3? 7.1 .6 63 8.8 6.4 3.9 3.5 8.4 24 7 1 75 53- 4 140 9.3 6.0 3.9 3.5 8.4 29 119 72 2 2 75 9.3 5.7 3.9 3.4 3) 122 75 4 58 :::::: 1C 93 11 5.7 3.9 3.3 8.4 31 109 0 52 23 13 4.0 3.3 Tom MEAN 135 78.6 . 63.0 154 49.6 U.8 5.21 4.28 9.52 MIX 16 6.5 5.4 25 MIN .30 4.1 28 8.8 7.1 3.6 8.8 8.8 5.7 3.9 3.3 8.4

KTR YR

DISCHARGE, IN CUBIC FFET P c " ccrn ND, WATER YEAR QCTQ8E SEPTEMBE < '196H

04V

I 4. 3 3.4 73 14 17 25 28 20 14 20 93 81 2 4. * 3.4 25 15 16 23 45 19 14 14 97 64 3 4.

6 4. 3 3.5 24 9.0 16 25 18 17 14 13 92 88 7 4. I 3.5 20 13 16 40 20 17 14 12 97 85 8 3. 3 3.5 25 15 17 90 22 16 14 12 90 88 9 3. b 3.5 14 9.9 22 45 21 16 14 11 92 92 10 3. 5 3.7 9.9 9.0 32 41 21 16 13 11 88 110

11 3. » 3.8 9.9 25 23 35 21 16 13 11 88 127 12 3. 1 4.C 11 14 17 33 21 16 13 11 91 122 13 3. 3 4.1 11 9.0 38 37 20 16 13 11 .94 122 14 3. S 4.3 11 9.C 58 45 19 16 13 11 108 122 15 3. 3 4.5 27 9.0 122

16 3. 1 4.6 20 3 28 34 22 16 14 11 114 123 17 3. ! 4.6 9.0 6 16 33 21 16 14 11 114 123 16 3. 2 4.6 65 4 16 32 21 15 15 11 120 111 19 3. ? 201 104 5 16 31 19 15 15 11 120 1C3 15' 20 3. '. 193 65 6 16 30 20 15 11 12C 93

21 3. ' 222 45 16 17 25 21 15 15 12 125 8 22 3. > 106 3? 14 16 23 21 15 14 12 12C 6 23 3. ) 26 31 11 18 21 21 15 13 12 120 8 24 3. S 25 28 13 17 22 21 15 12 70 120 8 25 3. J 31 27 13 16 23 21 15 12 119 120 8

26 3. » 34 28 11 16 23 22 14 11 119 121 87 27 3. 36 29 39 17 23 22 14 11 122 121 100 3. > 39 20 52 19 23 22 14 137 121 124 29 3. J 40 13 35 2? 22 23 14 38 122 97 118 30 3.'k 95 13 11 ______20 21 14 38 101 84 118 31 3.i 14 22 21 14

MEAN 3.5 > 37.2 28.7 16.8 21.0 30.2 22.5 15.9 15.3 37.4 104 101 MAX 4. 222 104 52 58 MIN 3. 3.4 9.0 9.0 16 16 18 14 11 11 81 Rl 11087500 SAN GABRIEL RIVER AT PICO, CALIF. --CONTINUED

01SCH4KGE , IN CUBIC FEET PER SECOND, WATFR YEAR OCTOBER 1968 TO StPTEMBER 1969

AY 3CT NOV DEC JAN FER MAR APR MAY JUN JUL AUG SEP

98 108 65 56

50 21 66 67 39 5? 52 12 17 44 20 380 550 216 64 69 43 58 54 5 05 29 44 16 2,160 476 692 60 68 42 64 54 6 C2 56 52 7 3 9 71 15 43 44 129 1 ,790 467 96 73 55 6? 54 10 73 15 29 46 106 2 ,000 426 64 74 56 62 42

1 66 15 2C 44 6C 1 ,620 2 98 C8 17 58 49 95 44 16 128 73 1 ,690 295 86 57 60 46 54 83 19 16 753 73 1 ,380 310 90 74 55 43 50 5 69 1C7 18 29 1C4 841 261 90 76 57 6C 50 6 96 76 60 6J 50 7 6 74 62 52 79 15 34 107 64 273 50 104 86 43 " 95 37 46 654 74 166 47 110 69 64 71 0 92 115 54 2 ,430 71 168 46 102 65 64 32 69

95 13C 47 1 ,750 66 856 44 112 67 2 95 13C 43 609 63 3 76 135 39 51? 235 218 44 106 54 37 28 60 4 216 43 98 74 43 26 62 5 26 16 217 7 ,160 ,090 163 65 86 76 55 29 64 6 38 16 145 10 .200 1 ,IOC 92 120 7 39 31 36 7 ,660 ,56C 90 108 73 64 56 54 65 6 27 43 43 4 ,690 ,903 98 108 67 57 60 62 64 9 33 42 42 405 100 108 67 54 55 62 69 66 43 4D 34 62 67 80 ______42 423 1C2 74 1,704 AN 63.7 62.7 46.5 1 ,363 1,676 847 222 91.2 69.0 52.0 51.3 56.6 66 74 64 71 37

MIN 15 AC-FT 274,600

DISCHARGE , IN CUBIC FEET PER SECOND, WATER YEAR OCT06ER 1969 TO SEPTEMBER 1970

»Y )CT NOV DEC JUN JUL AUG SEP 1 2 54 140 114 110 06 874 65 62 1C2 102 99 17 3 44 120 110 106 02 69 74 64 106 114 101 13 42 122 112 10B 114 76 15 5 37 110 112 1C6 06 765 71 62 106 110 96 60

6 37 655 106 1C6 02 106 69 0 102 95 15 99 7 37 741 106 108 34 84 62 0 102 92 16 99 6 36 65 119 ice 02 74 32 6 104 93 16 99 9 34 55 94 63 29 73 31 5 102 92 22 101 10 73 30 5 100 69 16 99 11 38 49 40 96 12 37 41 44 67 13 14 80 76 102 65 36 96 15 84

16 101 17 62 149 104 78 54 65 40 60 100 110 102 104 16 86 140 106 52 56 60 42 BO 92 107 122 105 19 96 133 104 47 96 58 86 90 91 105 94 105 20 02 127 104 47 96 56 96 94 92 108 92 135 21 109 86 75 22 20 116 117 66 20 23 33 116 100 94 94 56 114 43 93 106 86 32 24 47 114 96 60 92 54 108 42 95 106 64 49 25 40 116 96

26 36 114 100 52 100 49 94 118 96 108 92 51 27 45 118 100 104 104 28 47 118 96 108 900 57 86 110 96 110 92 47 29 4? 122 102 108 71 86 110 92 10S 91 48 30 86 108 97 99 93 48 31 38 104 102 98 106 97 55

EAN 8 .4 153 99.4 99.7 167 190 72.7 77.2 99.3 101 103 70.3 AX 47 741 125 432 1,090 1 ,880 114 118 108 114 136 105 IN 34 41 40 85 55 13

,100 SAN GABRIEL RIVER BASIN

11088000 SAN GABRIEL RIVER AT SPRING STREET, NEAR LOS ALAMITOS, CALIF.

DRAINAGE AREA.--472 sq mi. PERIOD OF RECORD.--October 1927 to September 1951, October 1952 to September 1970. Monthly discharge only for October 1927 to September 1936, published in WSP 1315-B. GAGE.--Water-stage recorder. Datum of gage is 11.87 ft above mean sea level (levels by Los Angeles County Flood Control District). Prior to October 1952, at present site at datum 4.82 ft higher and October 1952 to Nov. 17, 1964, at site 455 ft downstream at datum 0.38 ft higher. AVERAGE DISCHARGE.--42 years, 28.2 cfs (20,430 acre-ft per year); median of yearly mean discharges, 3.8 cfs (2,800 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in 1966-70 are contained in the following table: Maximum Wtr yr Date Discharge G.H. Date 1966 Feb. 6, 1966 1,950 4.40 Long periods 1967 Jan. 23, 1967 4,760 6.55 Many days 1968 Nov. 21, 1967 3,280 5.42 Short periods 1969 Jan. 25, 1969 11,600 9.37 do. 1970 «ar. 5, 1970 5,550 6.86 do. Period of record: Maximum discharge, 27,000 cfs (estimated) Mar. 2, 1938; no flow for several months in each year.

voir since January 1956 (capacity, 36,160 acre-ft), and by several small flood-control reservoirs (combined

in streambed. AVERAGE DISCHARGE represents flow to ocean during period of record regardless of upstream

COOPERATION.--Records furnished by Los Angeles County Flood Control District and reviewed by Geological Survey. REVISIONS (WATER YEARS).--WSP 1315-B: 1937(M). WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

AT DCT NOV DEC JUN JUL AUG SEP 1 0 0 80 1.9 0 0 0 0 0 .1C .10 2 0 0 61 8.7 .30 0 0 0 0 .20 0 3 0 0 26 1.9 .20 0 0 0 0 .20 .10 4 0 0 20 .10 0 0 0 0 C 0 U 5 0 0 15 0 C 0 0 0 0 0 0 6 0 C 6.7 630 C 0 0 C .1C .20 0 7 0 0 4.C 51 0 0 D 0 .10 .20 0 8 0 0 2.9 1.8 C C 0 0 .10 .10 .20 9 0 1C 1.6 .20 0 0 2.1 0 .90 .20 .20 10 0 19 .50 0 0 0 1.2 0 .50 .60 .20 1 C 5.0 .10 0 0 C 0 0 .2C 1.4 .20 2 0 29 .10 0 0 0 0 C D .20 .10 3 0 IB 0 0 0 0 0 0 0 .10 .10 4 26 15 0 0 C 0 0 0 .10 .20 .10 5 49 5.9 0 0 C 0 0 0 .10 D .10 6 235 3.1 0 a o 0 0 0 .10 .20 .10 7 358 .50 .10 0 C 0 0 0 .10 .20 .30 8 85 3 0 0 0 0 0 0 .20 .30 .30 9 0 0 0 0 0 0 .10 0 .10 .2C .30 0 0 0 .73 0 0 .10 0 0 .10 0 .20

1 G 0 0 0 0 0 0 .20 .20 0 .20 2 280 0 0 a c 0 0 .10 .20 0 .20 3 188 0 0 0 C 0 0 .10 .20 .20 0 4 244 0 0 0 20 0 0 .10 0 .1C 0 5 72 0 0 0 106 0 0 .10 0 .20 0 6 40 C 0 0 .80 0 0 .10 0 .50 0 7 18 0 0 0 0 .30 .10 .10 0 .20 .10 8 10 0 0 0 0 .30 0 .10 .10 .30 .10 9 0 485 0 0 0 0 .10 .50 .20 .10 0 0 34 247 0 0 0 .10 .20 0 .10 1 a? 95 0 0 .10 .10 TAL .70 3.50 1.10 4.20 6.40 3.40 AN 0 53.5 23.0 18.1 24. a 4.11 .023 .11 .037 .14 .21 .11 X 0 358 485 247 630 106 .30 2.1 .20 .90 1.4 .30 N 0 0 0 0 0 0 0 0 0 0 0 0 -FT 0 3,180 1,410 1,110 1,380 253 1.4 6.9 2.2 8.3 13 6.7 AC-FT 12,620 AC-FT 7,380 t>AN GABRIEL RIVER BASIN

11088000 SAN GABRIEL RIVER AT SPRING STREET, NEAR LOS ALAMITOS, CALIF.--CONTINUED

DISCHA DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .10 .26 0 0 .30 121 0 0 .2 .50 2.4 2 .10 0 1C 0 .1C 185 0 C .? .50 1.8 3 0 .20 1.95C 0 .20 .30 0 0 .50 .50 .20 4 0 0 25 0 -20 .60 0 C .2 1.2 .50 5 C C 1,960 0 -.10- .20 .10 0 0 .2 1.2 1.6

6 0 .20 1,860 0 .1C COO .30 1.2 1.8 7 0 It 190 616 0 C 73 0 0 .30 .50 2.0 8 C 2i: 42 0 C 2.1 D .50 .50 1.? 1.8 9 0 .1C 31 0 o C 0 1.4 .50 .50 1.6 10 3 1.3 .50 0 0 0 1.8 1.4 .50 1.2 1.6

11 3 C C 0 5 .9 310 0 1.4 .50 1.2 1.4 12 0 3 0 C 0 .8 6.8 0 2.5 .50 1.4 1.6 13 0 C 0 0 0 18 0 C .50 .4 1.4 1.8 I* 0 c C 0 0 15 o o c .2 1.4 .30 15 0 C C 0 0 .20 0 0 .20 .2 1.4 1.2 16 0 ^ 0 . C 0 0 0 .20 .50 1.2 .50 17 0 £ £ . D 0 C 0 .20 .2 1.2 .20 18 0 0 o . 0 .10 13 0 .30 .2 1.2 .30 19 0 0 a . 0 . to 1 6 0 .20 .2 1.4 .30 20 .20 3.8 0 . 0 0 0 0 1.2 .2 1.4 .20

21 0 l.« 0 .10 0 13 0 .6 .50 .50 .10 22 0 C C 1,090 0 55 3 .4 .2 .30 .20 23 0 .20 0 87? .10 2.0 1.2 .2 .6 .20 .23 24 .10 0 0 662 0 47 .20 .2 .2 .20 .30 25 .20 0 C 466 j 2.0 0 .4 .2 .10 .20 26 .20 0 0 5.7 0 C 0 .50 .50 .20 .10 27 .20 0 0 0 3 03.2 .30 .20 .30 28 .30 C C 0 0 5.9 0 .2 .30 .20 36 29 .20 D C ------) 11 0 .2 .30 .20 2.5 30 .10 (j 0 ) .20 0 .2 .30 .20 1.4 31 .20 C 8.1 .50 .30

MEAN .061 46.9 210 100 .82 .78 2.15 MAX .30 1,190 1,960 1,090 .30 182 565 1.8 2.5 1.6 1.4 36 WIN 0 0 0 0 0 0000 .30 .10 .10 50 48 128

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 .10 .10 8 2.7 .2C .10 30 .50 .30 .30 .20 .30 2 0 .13 2 1.8 .20 .10 56 .30 .50 .50 .20 .20 3 C .10 . 2 1.4 .10 .20 24 .30 .30 .50 .20 .30 4 0 .10 . 3 1.2 .10 .30 16 .50 .30 .50 .20 .10 5 0 .30 . 9 1.4 .10 .13 25 .50 .30 1.2 .30 .10 6 0 1.2 .50 .30 .10 7 0 .30 6 .30 .10 82 2.9 .30 .50 1.2 .30 .10 a 0 .10 1 .10 .10 476 2.0 1.2 .50 .20 .30 .10 9 0 .20 .4 .10 3.8 2 S 1.2 .10 1.4 .20 .4 .10 13 .20 .30 .3 .10 1.6 16 .50 .10 1.2 .30 .8 .10 11 .10 .20 .2 2.7 12 .10 .50 .10 0 1.6 10 .10 .10 1.4 .20 .4 .10 13 .20 .50 0 12 23 .10 .20 1.2 .50 .4 .10 14 .10 .1C 0 2.2 1 3 .10 .10 1.2 .10 .4 .10 15 .10 .10 0 2.9 19 .10 .10 .50 .10 .2 .30

16 0 .1C 0 5.3 15 .10 .30 1.2 1.2 .50 .20 17 .10 .30 0 10 1 3 .20 .20 1.2 .30 .50 .10 18 .10 1.2 28 0 5.3 1 3 1.2 2.5 .50 .50 1.2 .20 19 .10 127 13 .10 4.6 1 D 3.1 1.2 1.2 .30 .50 .30 20 .10 200 5 .10 2.7 10 3.1 .50 .30 .20 .50 .30 21 .10 847 3 .30 2.2 7.7 2.7 .20 .50 .30 .20 .50 22 .10 101 1 .30 .20 b.2 2.3 .20 .30 .50 .30 1.2 23 .10 26 .8 .30 .10 !>.0 1.6 .50 1.2 1.4 .30 .30 24 .10 4.C .7 .30 .10 2.9 1.4 1.2 .30 1.2 .30 1.6 25 .10 2.G .2 .30 .20 2.2 .50 .50 .50 .30 .30 1.4 26 0 .20 .30 .20 27 0 .50 .0 17 28 .10 2.2 .0 2.3 .20 2.2 .20 .50 .20 .20 .50 .20 29 .10 1.4 .0 .10 30 0 156 .7 .10 2.2 .30 .30 .30 .20 .50 .20 31 .10 13 .20 .50

MAX .20 847 282 17 12 476 56 2.5 1.4 1.4 1.8 1.6 MIN 0 .10 0 0 .10 .10 .10 .10 .10 .10 .20 .10 AC-FT 4.2 2,930 1.520 28 38 18 SAN GABRIEL RIVER BASIN

11088000 SAN GABRIEL RIVER AT SPRING STREET, NEAR LOS ALAMITOS, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

AY DCT NOV JUN JUL AUG SEP - 1 .10 .20 .1 261 3,820 C .1C .20 .20 .10 .40 2 .10 0 .2C .1 147 l,45u .70 .20 .30 .40 .10 .50 3 .80 C .2C .1 345 968 114 .20 .20 .40 .10 .40 4 0 l.B .23 .1 354 380 21 .20 .40 .80 .U .40 5 0 .1C .20 .1 1.32C 315 389 .40 .40 .30 .1C .70

6 .10 o .2: .1 4,770 249 531 .40 .10 .30 .1C .10 7 .10 .1C .30 .1 3.45D 247 400 .30 .10 .43 .Zj .10 a .10 0 .3? .1 45 ,480 301 .20 .20 ,?0 .3C .50 9 .10 .10 . 30 .1 33 ,520 315 .30 .10 .40 .4C .30 10 .10 .10 .3r .1 23 ,760 417 .30 .10 .10 BO .20

11 . 20 .1C 14 .1 2.3 ,46C 232 .1C .10 .80 l.C .10 12 .30 .1C . 4r .1 .2 ,170 238 .1C .10 1.3 l.C .8C 13 .20 .10 .2^ 41 .1 ,45J 239 .1C .10 .10 1.0 1.3 14 2.1 .1C .10 631 .1 ,390 239 n .10 .20 .?C 1.3 15 2.3 IB .10 7.4 45 629 232 0 .10 .4C .40 1.0

16 .30 1.2 9.2 .1 67 688 50 .10 .10 .3 .50 .50 17 0 C .80 .1 25 695 .10 .10 .10 .3 .81. .40 IB C 0 . 10 38 88 171 .10 .10 .10 .5 .8C .5: 19 .10 0 r, 486 55 66 .1C .1C .10 .3 ,81 .80 20 .10 0 4.1 2,550 35 29 .2i. .10 .10 .50 .80 .50

21 0 0 .53 1,780 36 306 .2- . 0 .10 .3 1.0 .50 22 0 0 .23 616 174 284 .10 . 0 .10 .8 .80 .50 23 0 .10 .1. 255 563 48 .10 . 0 . 10 .5 .80 l.C 24 0 .10 .10 3,840 2,170 48 .30 . 0 .10 .40 .Si .1C 25 0 -1C 51 7,530 7,770 35 .20 . 0 .10 .10 .8C .10

26 .10 .1C 240 9,350 8,390 1.0 .10 1. .10 .10 l.C .10 27 .10 .10 31 6,810 5,760 0 .20 . 0 .30 .10 1.0 .10 28 .10 .1C l.B 4,660 4,390" C .20 . C .10 .10 .50 .10 29 -ID .10 2.1 357 0 .20 . 0 .20 .10 l.C .10 30 5.2 .20 .50 173 0 .10 . 0 .10 .10 .50 no 31 .10 .13 232 C . 0 .10 .50

OTAL EAN AX 5.2 18 24? 9,350 8,390 3,820 531 1.0 .40 1.8 1.0 1.3 IN 0 0 0 .10 .10 0 0 0 .10 .10 .1C .10 13 8.7 35 36 25

207, 30C

AY OCT NOV JUN JUL AUG SEP

1 .06 .12 .06 .12 .09 1,760 .12 .12 7.7 15 6 12 2 .04 .20 .09 ,o4 .06 699 .04 .09 0 15 8 12 3 .04 .30 .09 0 .06 3.7 .06 .09 9.3 13 9 14 4 .09 1.2 .06 0 .09 111 .04 .09 LI 12 0 10 5 .06 .20 .06 0 .12 1,110 C .12 .40 11 1 13

6 .01 254 .06 0 .09 20 0 .09 6.2 12 2 13 7 .01 779 .04 0 .09 3;7 0 .09 9.8 14 2 13 8 .0', .40 .06 0 .09 .09 .06 .09 9.3 15 2 7.7 9 .12 .02 1.4 11 18 .06 0 .30 8.8 16 2 14 10 .12 .40 .02 54 593 .04 0 .30 0 15 0 14

1 .02 .C4 .02 12 673 0 C .20 9.3 12 8 12 2 .12 0 0 20 1.6 0 .06 .12 9.3 13 8 ID 3 .20 0 0 7.4 .12 0 .06 .20 11 13 6 10 4 .20 £ 0 20 .12 0 0 .20 8.8 11 1 10 5 .20 0 .09 4.5 .12 .06 .06 .12 9.3 13 1 10

6 1.4 0 .20 262 .12 .06 .06 .20 2 16 1 9.3 7 1.2 0 .06 88 .30 0 .20 .20 4 14 8.4 11 8 .30 0 .20 1.2 .30 0 .09 -SO 7 14 .04 13 9 1.4 .04 .06 .1 .06 0 .20 .30 1 16 .06 15 0 .20 .09 .06 3 .06 0 .12 .20 8 13 .04 13

I .09 0 .06 .3 .06 0 .20 7.7 6 11' .04 14 2 .09 0 .04 .1 .02 .0 .30 6 9 13 1.8 15 3 .09 0 .04 .0 .02 .0 .12 5 9 14 5.9 18 4 .20 0 .12 .0 .02 .0 .04 6 6 14 6.7 16 5 .20 .06 .12 .0 .02 .0 .12 6 8 14 7.7 15

6 .30 0 .06 1.2 .02 .0 .09 6 7 5 9.8 10 7 .12 0 .06 2.9 .02 .0 0 6 6 6 1 1 12 8 .12 0 0 .30 560 .1 0 5 8 4 1 6 14 9 .09 0 0 .06 .1 .20 1 7 6 1 3 13 0 .12 .06 0 .04 .1 .12 10 B 6 9.B 11 1 .12 .12 .06 . 1 5 1 1

AN .24 34.5 .10 15.7 66.0 12 .079 4.87 12.9 13.9 12.5 12.5 X 1.4 16 21 16 N .01 0 0 0 .02 0 0 .09 .40 11 .04 7.7 -FT 15 SAN GABRIEL RIVER BASIN

11088500 BREA CREEK BELOW BREA DAM, NEAR FULLERTON, CALIF.

DRAINAGE AREA.--21.6 sq ml.

PERIOD OF RECORD.--January 1942 to September 1970.

AVERAGE DISCHARGE.--28 years, 1.07 cfs {775 acre-ft per year); median of yearly (360 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in 1906-70 are contained in the following table

966 Nov. 22, 1965 967 Dec. 3, 1966 968 Mar. 8, 1968 969 Feb. 25, 1969 970 Mar. 4, 1970

REMARKS.--Records fair. No gage-height record Feb. 27 to Apr. 3, 1969. Flow regulated by Brea flood-control reservoir ("capacity, 4,100 acre-ft). No diversion above station. Since August 1966, low flow mostly the

Los Angeles River basins elsewhere in this report. REVISIONS fWATER YEARS).--WSP 1041: 1944fM). WSP 1635: 1956, 1958. KSP 1928: Drainage area. DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG

1 0 0 .10 .4C 0

15

.25 2.1 1.9 3.7 1.5 SAN GABRIEL RIVER BASIN

11088500 BREA CREEK BELOW BREA DAM, NEAR FULLERTON, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 .10 .10 . 10 0 .10 .10 4.6 .10 .20 0 .10 .10 2 .10 .10 3.9 C .20 .1C 6.2 .1C .20 0 .10 .10 3 .10 .10 155 0 . 10 C .50 .10 .20 0 .10 .20 4 .10 .10 1.2 0 .10 .30 . 6C .10 .20 a .10 5 .10 .10 190 .20 .1C C .30 .10 .20 0 .10 .20 6 .10 .10 152 .20 0 C .10 .10 .10 0 .1C .10 7 .13 73 24 .10 .10 .10 .10 .10 .20 .10 .10 .20 8 .20 1.4 1.3 .10 0 .10 .10 .20 .20 .10 .2: .20 9 .10 .10 .50 .10 .10 .10 .10 .20 .20 .10 .2t .10 10 .10 0 .2C .10 . 10 .10 .10 .20 .20 .10 .1C .20

11 .1C 0 0 0 3.0 22 .10 .20 .10 .20 .20 12 0 0 0 .10 .10 .80 1.2 .20 .20 .10 .10 .20 13 .10 0 0 0 0 5.0 .30 .20 .10 .10 .10 .20 14 .10 0 0 0 .20 5.4 .20 .20 .20 .10 1.1 .20 15 .10 .10 c .10 0 1.2 .10 .20 .20 .10 .10 .20 16 .10 .10 0 0 0 .70 0 .20 .20 .10 .1C .20 17 .10 .10 .10 0 .10 .50 0 .20 .20 .10 .20 18 .10 .1C .10 0 .10 .40 .20 .20 .20 .10 .10 .20 19 .10 .10 .20 0 .10 .40 7.1 .20 .20 .10 .lu .20 20 .20 .20 .10 .10 .20

21 .10 .10 0 .10 .10 .30 1. 22 .10 .1C 0 55 .10 .20 6. ,3 .20 .10 .10 .10 .30 23 .10 .10 0 54 . 1C .20 1. ,2 .20 .10 .10 .10 .20 24 .10 .20 0 152 .1C .10 1. .5 .30 .10 .10 .2C .20 25 .10 .10 c 172 0 . .10 .90 .20 .10 .10 .10 .30 26 .10 .10 0 2.C 0 . 10 20 .20 .10 .10 .10 .30 27 .13 .10 0 1.3 0 .10 10 .20 .10 .10 .20 .20 28 .10 .10 0 .80 .1C .10 .20 .20 .10 .10 .1C T.O 29 .10 .10 c .10 .10 ,40 .20 .10 .10 .20 .10 30 .10 .10 c .40 .10 ,20 .20 .10 .10 .20 .10 31 .10 1.2 TOTAL 3.10 MEAN .1C 2.56 17.1 14.2 .075 .71 2.29 .18 .16 .081 .16 .42 MAX .20 73 19C 172 .20 5.4 22 .30 .20 .10 1.1 7.0 MIN 0 0 0 0 0 0 0 .10 .10 0 .10 .10 11 9.5 5.0 9.7 25 1,370 WTR YR

DISCHARGE, IN CUBIC FEET PER SECOND , HATER YEAR OCTOBER 1967 TO SEPTEMf iER 1968 DAY OCT MAY JUN JUL AUG SEP 1 .10 2 .10 .10 .2C .20 .10 .20 3. I .20 .30 .20 3 .10 .10 .10 .20 .10 .20 60 .20 .20 .20 .30 .20 4 .10 .10 .30 .20 5 6 7 .10 .10 .40 .20 .20 6.9 10 .20 .20 .30 .20 .20 8 .10 .10 .70 .10 .ID 226 30 .20 .20 .30 .3C .10 9 10 .10 .10 .10 .10 .10 1.2 10 .20 .20 .20 .20 .10 11 .10 .10 .10 .20 .10 .60 20 .20 .10 .20 .20 .10 12 .10 .10 .10 .10 .10 .40 20 .20 .20 .20 .20 .20 13 0 0 15 0 .10 16 0 17 0 .10 .10 .20 .20 .40 20 .20 .10 .20 .20 .20 18 .10 .40 83 .10 .20 .10 20 .1C .10 .20 .30 .10 19 .10 53 9.2 .20 .20 .50 20 .20 .20 .20 .20 .20 20

21 0 36 .80 .10 22 0 .60 .40 .20 .20 .20 20 .10 .20 .20 .20 .10 23 0 .10 .10 .10 .10 .20 20 .10 .20 .20 .20 .10 24 0 .10 .10 .20 .10 .20 10 .10 .20 .20 .23 .10 25 0 .10 .10 .20 .20 .20 20 .20 .20 .20 .20 .10 26 .10 0 .20 .50 .20 .20 20 .20 .10 .30 .20 .10 27 0 .10 .20 2.0 .10 28 0 .10 .20 .90 .20 .20 20 .20 .20 .20 .20 .10 29 .10 0 .20 33 .10 15 .20 .20 .20 20 .10 .10 .20 .20 .10 31 .10 TOTAL 1.90 108.80 100.00 8.70 .22 .22 .14 MAX .10 53 83 2.0 1.0 226 3 .1 .20 .30 .30 .30 .20 MIN 0 0 AC-FT 3.8 216 198 17 15 485 21 11 9.9 13 14 8.5 CAL YR 1967 TOTAL 773.90 MEAN 2.12 MAX 172 MIN 0 AC-FT 1, 540 SAN GABRIEL RIVER BASIN

11088500 BREA CREEK BELOW BREA DAM, NEAR FULLERTON, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 AY OCT NOV DEC JAN FEB 1AR APR MAY JUN JUL AUG sd 1 .10 .10 .20 .13 3.6 .» 2 .10 .1C .20 .13 9.5 .0 .0 . 3j .30 .30 .10 .1 3 .10 .1C .1C .14 9.7 .0 .5 .30 .20 .40 .10 .1 4 .10 .10 .20 .14 11 .0 .8 .30 .30 .30 .1C 5 .05 .2C .10 .15 25 .0 .2 .20 .20 .30 .04 6 .10 .20 .IP .13 162 .0 .9 .30 .20 .30 .1C _ 7 .10 .10 .10 .13 10 .0 .? .30 .10 .30 .1C 8 .10 .10 .10 .13 9.7 .0 .9 .20 .C4 .20 .10 9 .10 .10 .10 .13 7.3 .0 .0 .20 .03 .20 .20 ' ' 10 .10 .30 1 .13 .30 .30 .13 7.1 .0 .3 .20 .10 .20 .30 2 .10 .20 .10 .14 7.1 .0 .2 .23 .20 .20 .30 1 .10 .20 .10 4.9 7.1 .0 .2 .20 .30 .30 .20 4 .10 .10 .10 19 7.1 .0 .2 .20 .30 .30 .20 5 .10 .70 .10 .46 34 .0 .2 .20 .20 .50 .30 6 .10 . 10 .31 .19 11 .0 .1 .16 .20 .50 .20 .1 7 .10 .10 .10 .16 7.5 .0 .8 .16 .20 .30 .20 8 .10 .10 .10 7.6 8.9 .0 .8 .14 .30 .10 .20 9 .10 .10 .10 11 9.8 .0 .6 .14 .20 .40 .20 0 .10 .20 .40 ..161 .0 .4 .20 .30 .30 .20 3 1 .10 .10 . 20 95 7,5 1 .4 .15 .20 .40 .20 2 .10 .10 .1C 7.9 38 .0 .1 .07 .20 .30 .20 3 .10 .10 .10 3.5 145 .0 .90 .04 .30 .30 .20 4 .1C .1C . 10 70 316 .5 .70 .07 .40 .20 .30 5 .10 .10 13 302 594 1 6 .10 .1C 4.0 316 310 .0 .50 .11 .40 .10 .2C 7 .10 .10 .20 95 15 .0 .30 .10 .30 .10 .20 8 .10 .20 .1C 12 10 i 9 .10 .10 .10 9.3 .0- .40 .20 .30 .20 .26 .1 .40 .10 .10 8.0 .0 .40 .20 .30 .10 .21 .1 1 .10 21.20 1,132.82 7.11 6.04 X .40 .70 N .05 .10 .10 .13 7.1 2.0 .30 .04 .03 .04 .04 .1 14 16 12 1

AY OCT NOV DEC JAN FES AUG SE 1 .55 .18 .12 .25 .15 .0 2 .10 .04 .20 .22 .35 22 .50 .15 .12 .18 .15 3 .08 .03 .19 .22 .37 80 .46 .15 .13 .22 .15 .0 4 .08 .03 .22 .23 1.5 30 .46 .15 .12 .19 1.1 .0 5 .06 .03 .23 .28 .^0 9 6 .41 .15 .12 .20 .15 .0 6 .08 34 .20 .22 .50 7 .08 16 .18 .23 .50 64 .39 .15 .16 .19 .16 .1 8 .10 .50 .23 .28 .1 9 .13 .20 .23 .31 3.8 .55 .37 .14 .10 .19 .18 .1 10 .17 .20 .19 1.1 25 .48 .37 .16 .10 .19 .16 .1 11 11 .46 .33 .14 .12 .19 .18 .1 12 .06 .20 .18 .80 6.9 .41 .33 .13 .10 .19 .1 13 .1 14 .08 .10 .18 .73 2.5 .35 .30 .12 .12 .20 .19 .1 15 .10 .10 .16 .64 1.8 .35 .30 .16 .11 .20 .19 .1 16 .13 .10 .16 7.4 1.8 .31 .25 .12 .15 .20 .18 .1 17 .08 .10 .18 1.5 .58 .26 .23 .14 .12 .20 .19 .1 18 .19 .19 .1 19 .19 .19 .1 20 .04 .20 .18 .80 .43 .22 .28 .13 .14 .20 .10 .1 21 .03 .20 .16 .70 .41 .22 .25 .13 .14 .19 .02 .1 22 .03 .20 .1 23 .03 .20 .18 .64 .31 .20 .22 .12 .19 .19 .02 .1 24 .03 .20 .18 .55 .31 .20 .19 .15 .20 .02 .1 25 .16 .02 .1 26 .01 .20 .23 .50 .20 .20 .19 .15 .22 .18 .02 .1 27 .18 .02 .1 28 .10 .10 .20 .41 13 .19 .18 .12 .23 .16 .03 .1 29 .08 .10 .22 .39 .25 .16 .12 .19 .16 .03 .1 30 .06 .10 .22 .39 2.0 .19 .12 .23 .15 .03 .1 31 .08 OTAL .15 .1 AX .17 34 .23 7.4 25 30 .55 .18 .25 .25 1.1 .1 IN .01 .03 .10 .19 .19 .19 .16 .11 .10 .15 .02 .0 9.1 12 9.1 7. SAN GABRIEL RIVER BASIN

11089000 BREA CREEK AT FULLERTON, CALIF.

LOCATION.--Lat 33°52'25", long 117°55'30", in SEVfE^SE .28, T.3 S., R.10 W., Orange County, between Maiden Avenue and Spadra Road at Fullerton.

DRAINAGE AREA.--23.6 sq mi.

PERIOD OF RECORD.--October 1930 to September 1969 (dis

change

AVERAGE DISCHARGE.--39 yeai (360 acre-ft per year).

ing table:

Wtl yr Date Discharge G.H. Date Discharge 1966 Nov. 22, 1965 365 1.32 Most of time ( 1967 Nov. 7, 1966 413 1.42 Several days ( 1968 Mar. 8, 1968 556 1.70 do . ( 1969 Feb. 25, 1969 980 2.40 do. (

Period of record: Maximum discharge, 3,700 cfs Mar. 14, 1941 (gage height, 5.45 ft); no flow for some day:

RhMA report. COOPERATION.--Records furnished by Orange County Flood Control District. REVISIONS (WATER YEARS).--WSP 1635: 1942(M), 1943, 1944(M). WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV JUN JUL

100 .00 0 C .10 1 0 0 A. 0 0 C 3 0 0 A. 0 0 0 .10 0 A. 7 6. 0 3 0 0 12 3. 0 0 0

0 36 2. 0 0 '0 .60 0 37 .30 0 C .AO 0 5.9 0 0 0 C .30 .30 0 0 0 0 C .60 .20 0 C 0 0 0 .60

0 3 0 0 0 0 0 127 COO .10 .30 0 M 0 0 0 C .70 0 28 0 0 0 .80 .60 0 10 000 3.6 .30

C .50 0 0 0 .10 .50 0 0 0000 .30 0 0 0000 .30 0 0 85 0 0 .60 0 0 11 27 0 .61) o 3.6 1.6 C

AL .50 302.10 1A8.80 29.00 52.50 A. 70 0 l.AO 1.20 N .016 10.1 A. 80 .9A 1.88 .15 c .OA7 .039 .30 127 85 27 A3 3.6 0 .60 .50 N 00 0000 0 -FT 1.0 599 295 58 IOA 9.3 0

WTR YR 1966 TOTAL 5A7.70 MEAN 1.50 MAX 127 HIN 0 AC-FT 1,090 SAN GABRIEL RIVER BASIN

11089000 BREA CREEK AT FULLERTON, CALIF.--CONTINUED GE, IN CU JIC FEET >EPTE»BER 1967 DAY OCT NOV JUN JUL AUG S

1 .63 .90 .60 .60 .30 .60 28 0 .90 1.6 .90 2 .60 .90 6.1 .90 .60 .60 7.1 .20 .2 1.6 .90 3 .80 .90 125 .60 .30 .60 1.6 .30 .2 1.5 1.0 4 .93 .60 1.4 .60 .20 .60 .90 .30 .2 .90 .90 5 .90 .60 158 .SO 0 .60 1.6 .50 .2 1.9 .90 6 1.2 .6C 128 1.6 0 .60 .30 .60 .2 .60 .90 7 .90 78 2C .60 0 .60 0 .90 .2 .90 .90 8 .90 3.2 .63 0 .60 .lu 1.? .2 .90 l.C 9 .90 .90 0 .60 3 .60 C 1.2 .2 .90 .90 13 .90 .90 a .70 C .60 0 1.0 .2 .90 .90 11 .90 .90 .70 0 7.5 24 .60 .2 .60 .90 12 .23 .90 0 .60 0 15 2.2 .60 .4 .60 .90 13 .20 .90 0 .60 .90 26 .90 .60 .90 1.2 .90 1. 14 .20 .60 .30 .60 .60 7.7 .23 .60 .90 1.2 2.4 15 .30 .30 .30 .60 . 60 1.7 C .90 .2 1.2 2.5 16 .63 .30 .30 .60 .t>0 0 1.2 .2 .90 2.2 17 .60 .60 .SC .6: .60 C C 1.2 .2 1.2 1.9 18 .60 ,3C .60 .60 .60 14 1.2 .2 1.2 1.6 19 .90 .40 .60 .60 C 22 1.2 .2 1.6 1.3 20 .80 .90 1.1 .60 . 60 c 6.0 1.2 .2 1.6 1.1 21 .60 .50 . 0 .80 .60 8.9 1.2 .2 1.6 1.5 22 .60 .50 74 .6j .20 13 .90 .2 1.6 .90 23 .60 .5; 47 .90 .20 1.6 .90 .2 1.2 .90 24 .60 .40 . 0 134 .60 .10 8.2 1.0 .2 .90 .90 25 .60 .60 . c 103 .60 .10 1.6 1.0 .2 .90 1.0 26 .60 .3C 1. 3.4 .60 .20 .60 l.C .2 1.2 .90 27 .60 .30 1. 2.2 .60 .30 .30 1.0 .2 1.2 .90 28 29 .60 .60 .60 . no .60 .60 1.0 .2 1.2 .9C .60 .60 .60 1.5 .10 0 1.2 .2 .90 .90 31

MEAN .67 3.2H 14.6 12.4 .41 2.68 4.81 .86 .18 1.15 1.13 MAX 1.4 1.9 2.5 9 MIN .20 .30 C .60 0 0 0 0 .90 .60 .70 AC-FT

MIN 0 AC-FT 1,320 MIN C AC-FT 2,690

DISCHARGE, IN CUB 1C FEET PER SECON 3, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY MAR APR MAY JUN JUL AUG S

1 .60 .90 1.6 .60 1.2 0 17 .30 .30 .60 .30 0 2 .3 l.C .90 .20 .70 0 16 .30 .30 .60 .30 0 3 .2 l.l 0 0 .90 C 1.9 .30 .30 .30 .30 I. 4 .2 .90 0 0 .90 .60 1.6 .30 .30 .30 0 1. 5 .2 .90 0 .6C .60

6 .2 1.2 0 0 .60 4.3 1.2 .30 0 .30 1.8 1. 7 .2 1.0 .50 0 .6C 23 1.2 .30 0 .30 1.8 1. 8 .3 .70 2.5 .60 .60 244 .60 .30 0 .50 1.5 1. 9 .6 .60 .60 1.2 6.0 .30 .60 0 J 1.2 I. 10 .5 .70 .60 .90 2.2 .30 .30 0 0 1.5 1. 11 .2 .60 .90 .60 1.9 .30 .60 0 0 1.0 1. 1? .4 ,6C 0 .60 .6C 1.6 .30 .60 0 3 1.2 13 .2 .60 0 .60 9.0 3.4 .30 .30 0 3 1.2 14 .2 .60 .60 3.9 1.9 .30 .30 0 0 1.5 15 .2 .60 c .60 .60 .90 .30 .30 .33 0 1.2 16 .4 .60 0 17 .4 .60 0 .60 .60 1.6 .30 .30 .30 .10 1.2 .« 18 .2 1.8 68 .60 .30 .60 .30 .30 .30 0 .90 1. 19 .4 68 31 20 .2 8.2 1.9 .30 .90 .90 .30 .60 C 0 1.2 21 .91 54 1.5 .30 .60 .90 .30 .60 C 0 .90 1. 22 .90 1.9 1.2 3 .60 1. 23 .90 .50 .60 .60 .30 .60 .30 .60 C 0 1.0 1. 24 1.0 .50 .60 .60 .30 .60 .30 .30 C 0 1.2 1. 25 .90 .30 .60 .60 .30 1.2 .30 .30 C 1.2 .90 26 .70 .30 .60 3.6 0 .6 .30 .60 C .30 .60 27 .60 .30 .70 15 0 .6 .30 .30 C .30 .30 28 .60 .30 .60 3.7 0 .6 .30 .30 .30 .90 0 29 .60 .30 .60 1.2 .30 .6 .30 .30 .30 .90 0 30 .90 34 .60 .60 .6 .30 .30 .30 .30 0 31 TOTAL 3 WEAN 1.10 6.12 3.70 1.25 .96 10.0 1.58 .38 .13 .24 .85 1.; MAX 1.6 68 68 15 9.0 244 17 .60 .30 1.2 1.8 1 MIN .60 .30 0 0 0 0 .30 .30 000 7.7 15 52 « SAN GABRIEL RIVER BASIN

11089000 BREA CREEK AT FULLERTON, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 JUN JUL AUG SEP

. 0 .90 .60 .90 3.0 19 3.0 2.0 1.5 .10 .60 0 . .90 .90 .90 3.0 12 5.0 2.5 2.0 .5 .60 0 .90 .6C .90 3.0 3.0 9.0 2.5 1.5 .2 .6C .40 .90 .60 .90 3.3 3.0 2.5 2.8 1.5 .5 .60 .50 1.2 .60 .90 11 3.0 5.0 3.0 1.5 .5 .4C .60 1.2 .3* .90 107 3.2 5.0 3.1 2.5 .5 .4C .60 1.5 .3D .60 15 2.2 4.0

. 0 .60 102 3.0 36 3.5 1.5 1.5 .9 .10 .70 . G .60 34 63 13 4.0 1.5 1.5 .8 .1C .80 .6' . 0 8.0 205 5.0 3.0 1.5 1.5 .90 .10 .90 . 0 .60 137 357 3.0 3.0 1.0 1.5 .60 .10 1. .60 19 3C6 625 3.0 3.0 .50 1.5 .30 .10 1. .60 16 213 274 3.0 3.0 .30 1.5 .40 .1C . 0 .60 1.6 65 23 3.0 2.5 .20 1.5 .80 .10 . 0 .90 .90 3.1 22 3.0 1.5 . 0 .60 ,6C 7.9 3.0 2.8 1.5 1.5 .60 .10 . 0 1. .60 .60 3.1 ______3.'j 2.0 1.5 1.0 .60 .1C 1. . o .90 3.1 3.0 1.5 .60 0 TOTAL 23.80 MEAN 1.4? 1.36 1.86 38.6 66.8 5.98 3.27 2.25 1.87 1.15 .39 .79 MAX 1.9 6.0 19 306 625 36 9.0 4.0 3.0 2.5 .90 1.5 .60 .30 .30 .60 2.5 1.9 2.0 .20 1.0 .10 0 0 87 81 114 2,380 3.710 366 195 139 111 71 24 47 SAN GABRIEL RIVER BASIN 30

11089500 FULLERTON CREEK BELOW FULLERTON DAM, NEAR BREA, CALIF. LOCATION.--Lat 33°53'45", long 117°53'07", in NFANW^Slft; sec.24, T.3 S., R.10 W. , Orange County, on left bank of1

DRAINAGE AREA.--4.94 sq mi.

PERIOD OF RECORD.--October 1941 to September 1970. GAGE.--Water-stage recorder. Altitude of gage is 250 ft (from topographic map]. V-notch sharp-crested weir use Oct. 25, 1946, to Feb. 2, 1956.

Wtr yr Date Discharge G.H. 1966 Dec. 29, 1965 22 .83 1967 Jan. 24, 1967 128 2.49 1968 Mar. 8, 1968 26 .92 1969 Jan. 25, 1969 313 4.32 1970 Mar. 5, 1970 36 1.13 P( mum discharge, 313 cfs

of San Gabriel and Los Angeles River basins elsewhere in this report. [

REVISIONS (WATER YEARS).--WSP 1245: 1950(M). WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

10000

3.7 3.6 .10

31 .10 10

TOTAL 0 59.50 27.80 10 1.0 MEAN o 1.98 .90 .32 .036 MAX 0 19 14 13 1.0 MIN 00000 AC-FT 0 118 55 20 2.0 SAN GABRIEL RIVER BASIN

11089500 FULLERTON CREEK BELOW FULLERTON DAM, NEAR BREA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

.n 19 5.8

.30 1.4 .40

.6C 2.6 .1C

29 000 C C 30 COO 0 C

TOTAL C 4.8 119.1,, 110.50 .3C 3.40 15.60 MEAN 0 .16 3.84 3.56 .Cll .11 .52 MAX 0 4.8 25 57 .10 1.4 5.0 MIN o c -> a c 0 0 AC-FT 0 9.5 336 219 .6 6.7 31

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1963

NOV DEC JAN FEB MAR APR MAY JUN JUL AUG

9.2 9.2 .10

TOTAL 0 13.60 MEAN 0 .45 MAX 0 6.5 SAN GABRIEL RIVER BASIN

11089500 FULLERTON CREEK BELOW FULLERTON DAM, NEAR BREA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

.70 .10 1.1

13 0 0 .12 .18 C 14 0 6.1 . 12 ti C 15 0 0 2.8 0 G

16 0 0 9. 1 C C 17 0 C .38 C 0 18 0 2.2 3.4 0 0 19 0 8.1 1.7 0 0 23 0 71 1.0 C C

21 0 20 .63

26 1.5 55 3* & 0 27 0 15 0 C 0 28 C 1.2 .73 C 0 29 u .10 C 0 30 0 .10 C 0 31 C .10 C ______

TOTAL 0 0 3.10 <>08.80 480.32 9.11 2.5C MEAN 0 0 .10 13.7 17.2 .29 .083 MAX 0 0 1.5 198 153 4.7 1.1 HIN 0000 0 0 0 «C-FT 0 C 6.2 811 953 18 5.0

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

NOV DEC JAN FEB MAR APR MAY JUN JUL AUG

0 0 C 11 0 0 0 0 7. 1 0 J 0 0 .04 3 0 C 0 4.0 0

I 0 .03 5.7 0 0 2 0 .35 0 C 3 3 C 0 0 C 3 4 0 .26 0 0 0 5 0 .16 30 0

6 0 5.0 oo a 7 0 1.3 0 0 C 8 0 000 3 9 0 C 0 C .01 0 0 000 .01

1 0 0 J C 0 2 0 0 0 C 0 3 0 000 0 4 0 0 0 C 0 5 0 000 0

6 0 000 0 7 0 000 0 8 0 0 4.6 C C 9 0 0 0 0 0 0 o .03 a 1 0 .10 0

TAL 0 10.5 0 7.22 18.1 38.33 0 .02 0 AN 0 .35 , 0 .23 .65 1.24 0 .0006 0 X 0 7.6 0 5.0 7.8 16 0 .01 0 N 00 000000 0 -FT 0 21 0 14 36 76 0 .04 0

AL YR 1969 TOTAL 911.43 MEAN 2.50 MAX 198 MIN 0 AC-FT 1,810 TR YR 1970 TOTAL 74.17 MEAN .20 MAX 16 MIN 0 AC-FT 147 SAN GABRIEL RIVER BASIN

11090200 FULLERTON CREEK AT RICHMAN AVENUE, AT FULLERTON, CALIF. LOCATION. --Lat 33°51'45", long 117°55'55", in NWsSWsSE^ sec. 33, T.3 S., R.10 W. , Orange County, on right bank 125 ft east of Richman Avenue in Fullerton. DRAINAGE AREA. --12. 1 sq mi. PERIOD OF RECORD. --October 1959 to September 1970. GAGE. --Water-stage recorder. Datum of gage is 126.4 ft above mean se-a level (levels by Orange County Flood Con­ trol District). AVERAGE DISCHARGE. --11 years, 1.91 cfs (1,380 acre-ft per year); median of yearly mean discharges, 1.2 cfs (870 acre-ft per year). EXTREMES. --Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water year: 1966-70 table: Maximum Miniir urn tr yr Dat Di G.H. Date DiscP arge 966 Jan . 30 1966 460 3.74 Many c ays 0 967 Nov . 7 1966 719 4.71 dc . 0 968 Mar . 8 1968 622 4.40 dc . 0 969 Jan . 25 1969 1,100 4.78 Severs 1 days 0 970 Nov . 6 1969 525 4.03 Many c ays 0 Period of record: Maximum discharge , 1,100 cfs Jan. 25 , 1969 (gage height, 4.78 ft); no flow for many days year fcMARKS. --F ee sc hematic diagram of Sa s Angele s repor 30PLRATION

DISCHARGE, IN CUBIC FEET PER SECOND , WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 OCT JUN ML AUG SEP

1 0 .10 0 .10 2.5 0 .10 .10 .10 .10 .10 .10 2 .10 0 0 .10 .70 C .10 .10 .10 .10 .10 .10 3 .10 0 0 0 . 10 0 .10 .10 .10 .10 .10 .10 4 0 0 0 .10 0 C .10 .10 .10 .10 .10 .10 5 0 .10 0 0 .10 0 .10 .10 .10 .10 .10 .10 6 0 .10 0 0 53 0 .10 .10 .10 .10 .10 .10 7 0 0 C 0 3.7 0 .10 .10 .10 .10 .1C .10 8 0 .10 .10 0 .10 lj .10 .10 .10 .10 .10 .10 9 0 C 12 0 0 0 .10 .10 .10 .10 .10 .10 10 0 0 21 0 0 0 .10 .20 .10 .10 .10 .10 11 0 0 .10 0 0 t/ .10 .10 .10 .10 .1C .10 2 0 0 2.0 0 0 0 .10 .10 .10 .10 .10 .20 3 0 0 I. I 0 0 0 .10 .10 .10 .10 .10 .20 4 .10 14 2.5 0 0 c .10 .10 .10 .10 .1C .10 5 0 18 .40 .10 0 c .10 .10 .30 .10 .10 .10 6 0 47 1.4 .10 0 c .10 .10 .70 .10 .10 .10 7 .10 24 .10 0 0 c .10 .10 1.2 .10 .10 .10 8 0 .30 0 .10 6 c .10 .10 .20 .40 .1C .10 9 .10 C 0 .10 0 0 .10 .10 .70 .20 .10 .50 0 .10 0 .10 .10 c .10 .10 .40 .10 .20 .10 1 .10 0 C 0 0 c .10 .10 .40 .10 .10 .10 2 .10 45 0 0 0 0 .10 .10 .10 .10 .10 .10 3 .10 21 .10 .10 0 0 .1C .10 .10 .10 .1C .10 4 .10 38 .10 0 0 0 .10 .10 .10 .1C .10 .10 5 .10 7.3 0 0 0 .10 .10 .10 .10 .10 .10 .10 6 .10 .30 0 0 0 0 .10 .10 .10 .10 .10 .10 7 .10 0 .10 .10 .10 0 .10 .10 .10 .10 .10 .10 8 .10 0 C 0 0 0 .10 .10 .20 .10 .10 .10 9 .10 0 64 0 0 .10 .10 .10 .10 .10 .10 0 .10 0 12 4 I 0 .10 .10 .20 .10 .10 .10 1 .10 2. 5 .20 .10 .10 .10 .10

.10 .21 .11 .10 .12 X .10 47 64 41 53 .10 .10 .20 1.2 .40 .20 .50 N 0 0 0 0 0 0 .10 .10 .10 .10 .10 .10 -FT 3.4 427 237. 84 120 .4 6.0 6.4 13 6.9 6.4 7.1 SAN GABRIEL RIVER BASIN

11090200 FULLERTON CREEK AT RICHMAN AVENUE, AT FULLERTON, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

AY QCT JUN JUL AUG SEP

1 .10 .10 .1C .40 0 .10 23 0 C .10 .1C *\> 2 .1C .10 3.C 0 0 .13 3.4 0 .10 .10 .10 .20 3 .10 .10 150 0 0 C .1C 0 .10 .10 .10 .2p 4 .10 .10 .20 .0 0 5.1 .40 .10 .10 .10 .1C zp 5 .10 .10 180 .10 0 0 .10 .10 .10 .10 .10 .20

6 .10 .10 lie 0 0 0 0 0 .20 .10 .10 .23 7 .10 87 40 0 .10 .10 .20 .10 .40 .10 .1C .20 8 .10 3.C 14 0 .10 c 0 .10 .10 .10 .1C 1 = 9 .10 .1C 4.2 0 .10 0 c .10 0 .10 .20 .lp 10 .13 .10 0 0 0 0 C 0 .10 .10 .20 .10

11 .10 .10 0 3 .10 2.6 15 0 .10 .10 .20 .10 12 .10 .10 0 0 .10 5.7 .10 0 .10 .10 .20 ?p 13 .10 .10 .10 0 .10 7.9 0 .10 .10 .10 .20 .i'p 14 0 .10 0 0 0 1.9 0 .10 .10 .10 .20 .20 15 0 .1C 0 0 0 0 c .10 0 .10 .20 .2 |0

16 0 .1C .10 0 .10 C 0 .10 .20 .10 .20 .2p 17 .10 .10 .10 3 .1C c 0 .10 .10 .10 .20 4 18 .10 .10 .10 0 .10 0 15 .10 .10 .10 .20 'g 19 .10 .10 .10 0 .10 c 17 .10 .10 .10 .20 IP 20 .10 .10 .20 0 0 0 .90 .10 .40 .20 .20 0 .10' 21 .10 .1C .10 .10 0 2.6 0 .40 .20 .20 .10 22 .10 .10 .10 73 .10 c 7.4 .10 .40 .20 .20 .lp 23 .10 . c .50 40 .1C 0 .30 .10 .20 .10 .2C lp 24 .10 . c .20 150 0 0 10 .30 .10 .20 .20 .10 25 .10 . 0 .20 52 0 0 .23 .60 .10 .10 .23 .10

26 10 . 0 .10 7.8 .10 0 C .50 .10 .20 .20 .10 27 .10 . 0 .13 3 .10 o 0 .10 .10 .10 .10 IP 28 .1C .10 .10 0 .10 0 .30 0 .10 .10 .1C 1.6[ 29 .10 .10 .10 0 0 0 0 .10 .20 .10 IP 30 .10 .10 .13 1.1 .10 0 0 .10 .20 .20 .10 31 .10 13 o .10 .20

OTAL 2.80 92.80 11

AX .10 87 180 150 .10 l.t IN 0 .10 000 0 0 0 0 .10 .10 0 C-FT 5.6 184 1,000 651 3.2 73 190 6.0 8.3 7.5 10 11

T0~ SEPTEMBER

AY OCT NGV DEC JAN FE8 HAR APR MAY JUN JUL AUG SEP

1 .10 .10 .50 0 0 2.0 12 .10 .20 .10 .10 0 2 .10 .10 0 0 .10 .10 4.1 .10 .30 .30 .10 u 3 .10 .1C 0 2. r o .10 .10 .20 .60 .10 .1C .1|0 4 .10 .10 0 0 0 .70 .10 .20 .10 .10 0 0 5 .10 .10 0 0 0 .90 .10 .10 .10 .10 .20 .10

6 .10 .10 0 0 .10 .50 .10 .10 .10 .10 0 o 7 .10 .10 1.3 0 .10 31 .10 .10 .10 .10 0 0 8 .10 .10 .40 -0 .10 153 .10 .10 .10 .30 0 0 9 .10 .10 0 0 1.1 21 .10 .10 .10 .60 0 .10 10 .10 .10 0 0 .10 5.6 .30 .10 .40 1 .5 .10 .1JO

11 .1C .10 0 .43 .10 6.2 .20 .10 .10 .40 0 .ijo 2 .10 .10 C 3 . 1C .10 .10 .20 .20 .60 .1C 0 3 .10 .10 0 0 17 1.7 .10 .10 .10 .60 .10 0 4 .10 .1C 0 0 .90 .10 .10 .10'.10 .10 .20 0 .10 5 .10 .10 0 0 .10 C .10 .10 .20 0 3

6 .20 .10 0 0 0 .90 .10 .20 .10 .40 0 0 7 .30 .20 .10 0 .10 .50 .40 .10 .10 .40 .10 .1,0 8 .20 3.4 49 0 0 0 .10 .10 .10 .40 0 0 9 .10 50 26 0 .10 0- .10 .10 .10 .50 0 0 0 .10 7.2 .10 0 .1C .10 .20 .10 .10 .40 0 c

I .10 59 0 0 .1C .10 .30 IP .10 .10 0 0 2 .10 5.0 0 0 .1C .10 .50 .10 .10 .30 0 .1|0 3 .10 .40 0 0 .10 .10 1.3 .10 .10 .10 0 .3'0 4 .10 .30 0 0 .10 .10 1.2 .10 .10 0 0 3 5 .50 0 0 0 .10 .10 1.6 .10 1.0 0 c 0

6 .50 0 .10 3.0 .10 .10 .60 .10 1.3 3 0 0 7 .50 0 .10 12 0 .10 .20 .10 1.6 .20 0 0 8 .50 1.4 .10 .< 0 .10 .10 .20 .10 .90 .10 0 0 9 .50 0 0 0 1.8 .10 .10 .40 .30 .10 0 c 0 .50 49 0 .70 .10 .10 .30 .10 .10 0 0 1 .40 .10 .20 .10 0

.50 .90 ,.i!o AN .20 5.92 2.51 .68 .78 7.28 .82 .13 .29 .27 .029 .037 X .50 59 49 2 17 153 12 .40 1.6 1.5 .20 .SO N .10 0 0 0 0 0 .10 .10 .10 0 0 !o -FT 12 352 154 « 17 1.8 2.2

AL YR 1967 TOTAL 745.70 MEAN 2.04 MAX 150 MIN 0 AC-FT 1,480 TR YR 1968 TOTAL 578.90 MEAN 1.58 MAX 153 MIN 0 AC-FT 1.150 SAN GABRIEL RIVER BASIN

1 1090200 FULLERTON CREEK AT RICHMAN AVENUE, AT FULLERTON, CALIF. - -CONTINUED DI

AY OCT NOV DEC JAN PER MAR APR MAY JUN JUL AUG SEP 1 .30 .10 .20 0 .10 1.1 .10 .20 .10 .20 .1C .10 2 .20 .10 1.2 0 .60 9.1 .20 .?0 .10 .1C .3D 3 .50 .40 2.1 . 0 0 .60 6.9 .10 .70 .10 .10 .10 .30 . 0 2.3 . 0 0 .20 .10 .10 .10 .10 .2C .1C 5 .50 . 0 2.3 . 0 26 .10 9.5 .10 .10 .10 .2C .13

6 .20 2 2.1 . 0 132 .20 1.2 1.0 .10 0 .10 .10 7 .70 1 2.3 . c 21 .30 .10 .10 .10 .10 8 .60 I 1.8 c 18 .10 C .10 .10 .10 !io .10 9 .60 2 .5C .10 C .10 C 0 .10 .10 .60 1 2.3 .10 .50 5.7 .BO .10 .10 1C .10 1 .60 . c 6.4 .1C .10 .10 .10 .10 .10 .10 .10 .10 2 .70 . 0 2.8 0 .10 0 .10 .10 .1C .20 .2C .1C 3 .10 . 0 2.6 .2C 6.5 .20 .10 .20 .30 .20 . 10 4 .50 . c 3.5 58 .1C .10 .10 .10 .10 .20 .3C .1C 5 .30 9 3.8 .20 31 .10 .10 .10 .10 .2G .20 .1C

6 .60 .20 3.3 .10 10 C .10 .10 .10 .10 .2C .1C 7 .50 .10 .30 0 .10 8 .60 0 .30 30 14 .10 .10 .13 .20 .10 .1C .1C 9 .7C .10 .30 49 16 . 10 .10 .10 .10 .10 .10 .10 .30 .1C l.B 347 3.8 .10 .1C .10 .20 .10 .10 .10 1 1.4 .10 0 102 .50 39 .10 .10 .10 .1C .1C 0° 2 .50 .20 u 39 80 4.8 0 1.7 .10 .10 .10 3 .40 .30 .10 4.0 177 .30 .10 3.2 .10 .1C .1C .10 .30 .60 .10 193 482 .10 .10 .1C .20 .10 .1C .10 5 .50 .1C 34 521 488 .30 .10 .20 .1- .10 .13 6 .60 1 .8 12 85 65 .10 .30 2.0 .10 .10 .23 .10 7 .20 3 .3 .20 34 4.8 .10 .30 2.7 .20 .10 .30 .10 8 .60 2 .1 .10 11 8.2 .10 .40 1.3 .10 .13 .13 .10 9 .60 1 .C 0 .60 .10 .30 1.3 .20 .10 .10 .10 0 2.6 .20 .10 .10 .30 .20 .10 .10 .10 .1C 1 .10

TAL 3.10 AN .55 1 .02 2.9? 4B.6 56.4 1.97 1.04 .52 .15 .11 .14 .13 X 39 9.5 3.2 .70 .30 .30 .30 IN . 10 0 0 0 0 0 0 .10 0 0 .1C 0 C-FT 34 61 180 2,990 3,130 121 62 32 8.7 6.6 8.5 6.2

01 AY

I .10 .10 0 .10 . 1C 32 0 .a .10 .10 .10 .1C 2 .10 .1C .10 .10 0 31 0 0 0 .10 .10 .10 3 0 .10 . 10 0 .10 .30 G 0 0 .10 .1C .10 0 .10 .13 0 .10 41 0 0 .10 .10 .20 .10 5 .10 0 .10 0 .10 14 0 0 .10 .10 .10 6 0 98 0 0 .10 .20 0 0 .10 .10 .2C .10 7 .10 30 0 .10 .20 0 0 0 .10 .10 .20 .10 8 .10 .1C .30 .10 .40 0 c 0 .10 .10 .20 .10 9 .10 .10 .1J 0 .20 .10 .20 .10 10 .10 .20 0 19 54 0 0 .10 .20 .20 .10 11 .10 0 0 5.1 3.7 0 0 0 .10 .10 .20 0 12 .10 .10 0 9.3 0 .10 0 0 .1C .10 .30 .10 13 0 .1C c .10 0 0 0 0 .10 .10 .23 0 0 0 3.6 0 .10 0 0 .10 .10 .20 0 15 0 .1C 0 1.6 0 .10 .20 3 .10 .10 .30 0 16 0 .20 0 28 0 .10 0 .20 .10 .3C 0 17 0 .1C c 1.3 3 .10 0 0 .40 .10 .30 .10 18 .10 .1C 0 0 0 c 0 3 .60 .10 .30 .10 19 .10 . 0 0 0 0 0 0 0 .70 .10 .20 .10 20 .10 . 0 0 0 0 c 0 0 .60 .10 .10 .10 21 . 0 .10 0 0 0 0 .30 .10 .10 .10 22 !i6 . 0 .30 .23 .10 0 0 a .80 .10 .10 .10 23 0 . 0 0 .10 0 .10 0 .60 .20 .10 .20 24 0 . c c .40 .10 c .10 0 .40 .20 .20 .10 25 .10 . c 0 .10 . 10 0 .10 0 .20 .20 0 .10 26 .10 C 0 .10 .10 0 .10 0 .10 .40 0 .10 27 .10 0 0 0 .1C 0 0 0 .10 .30 0 .10 28 .10 0 0 0 34 0 0 0 .10 .10 .1C .20 29 .10 0 0 0 0 .10 .20 .10 .20 .20 30 .13 0 0 0 10 0 0 .20 .10 .20 .20 31 0 .10 OTAL 2.10 130 .5C 1.20 75.00 97.00 129.30 .70 .20 6.90 4.00 5.30 2.90

AX .10 98 .30 28 54 41 .20 .10 .80 .40 .30 IN 0 0 0 0 0 0 0 0 0 .10 C 0 1.4 .4 14 7.9 11 5.B

TR YR 1970 TOTAL 455 10 MEAN 1.25 MAX 98 MIN 0 AC-FT 903 SAN GABRIEL RIVER BASIN

11090700 COYOTE CREEK AT LOS ALAMITOS, CALIF.

LOCATION. --Lat 33°48'38", long 118°04'28", in !WWE»iS)Pi sec. 19, T.4 S., R.ll W. , Orange County, on right bank about 250 ft downstream from Spring Street and 0.5 mile northwest of Los Alamitos. DRAINAGE AREA.- -136 sq mi.

PERIOD OF RECORD. --October 1963 to September 1970.

GAGE. --Water-stage recorde r. Datum of gage is 7.37 ft above mean sea level (levels by Los Angeles County Flooc Control District).

AVERAGE DISCHARGE.--? year s, 33.8 cfs (24,490 acre-ft per year). EXTREMES. --Maximums and mi 1966-70 are contained i n the following table: Maximum Minimum daily Wtr yr Date Discharge G.H. Date Dlscha: 1966 Dec. 29, 1965 5,020 4.48 Nov 8 1965 19b7 Jan. 22, 1967 6,880 4.98 Aug. 12, 1967 1968 Mar. 8, 1968 6,970 4.55 Oct. 18, Nov. 3, 1967 1969 Jan. 20, 1969 11,300 6.38 Apr. 9, 1969 3 1970 Feb. 10, 1970 4,600 4.21 July 7, 1970 Period of record: Maximum discharge, 11,300 cfs Jan. 20, 1969 (gage height, 6.38 ft); no flow Jan. 25, Feb. 15-17, 1964.

REMARKS. --Flows up to 100 cfs can be diverted from present Carbon Creek channel to Coyote Creek through the

reservoirs (combined capacity, 11,840 acre-ft). AVERAGE DISCHARGE represents flow to ocean during period o: basins elsewhere in thi s report. P g 8

COOPERATION. --Records furn ished by Los Angeles County Flood Control District and reviewed by Geological Survey. OISCHAKGF, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY OCT NOV

2 1.9 1.9 3.4 26 65 13 2.B 4.4 2.B 3.4 3.4 2 3 2.6 1.7 3.4 19 3.6 4. 3.0 5.1 2.6 4.4 3.4 1 4 2.6 1.7 3.2 11 3.6 5. 2.B 4.4 2.3 3.6 3.4 ; 5 1.7 1.5 3.2 B.2 3.2 5. 3.4 5.1 3.0 3.4 3.4 ; 6 1.9 1.5 3.2 6.7 B46 5. 3.4 3.6 3.4 3.2 3.4 ; 7 2.3 1.4 1.2 '4.4 65 5. 3.0 3.6 2.8 3.2 3.4 2 a ?.3 1.2 3.4 5.1 11 5. 3.6 4.4 2.3 2.B 3.4 ; 9 2.1 1.5 134 4.4 8.2 5. 6.7 15 3.2 2.8 3.4 10 2.1 1.5 11 2.1 1.5 12 2.1 1.5 13 2.1 1.3 14 1.9 157

16 1.5 850 17 1.9 772 IB 1.9 247 19 1.9 9.0 5.1 10 5.1 3.2 3.0 3.2 4.4 5.1 3.4

21 2.1 4.4 22 1.5 1,830 23 1.5 625 24 1.5 662 3.2 5.1 4.4 41 2.3 3.4 3.0 3.0 2.6 3 25 1.5 23C 26 1.5 38 28 1.4 6.7 29 1.5 5.1 1 ,650 11 3.0 3.2 5.9 3.6 2.6 1.9 4 30 1.7 7.4

MAX 2.6 1,830 MIN 1.4 1.2 3.C 3.2 3.2 3.0 2.3 2.1 2.3 2.3 1.7 ;

CAL YR 1965 TOTAL 14,055. 10 MEAN 38. 5 MAX 1,830 MIN .70 AC-FT 27,880 WTR YR 1966 TOTAL 11,858. 60 MEAN 32.5 MAX 1,830 MIN 1.2 AC-FT 23,520 SAN GABRIEL RIVER BASIN

11090700 COYOTE CREEK AT LOS ALAMITOS, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER l<»67

APR MAY JUN JUL AUG SEP 1 3.0 2.5 2.9 3.8 6.5 3.8 293 2 2.8 1.6 25 3.8 4.6 4.6 95 2.0 3.B 3.8 3.3 20 3 3.0 2.9 1,620 3.8 3.8 4.6 7.1 2.0 3.8 4.2 4.2 2.0 4 2.3 4.6 54 3.8 3.8 51 11 4.2 2.5 5 2.6 4.6 1,620 3.8 6 2.5 5.0 789 7 2.0 966 134 2.9 4.2 4.6 33 6.5 4.6 4.2 4.2 2.9 8 2.1 69 40 9 10 4.2 30 3.8 2.9 3.8 4.2 tl 3.8 3.3 3.8 2.C 4.2 12 13 2.9 2.5 4.6 2.5 4.6 177 14 2.0 2.9 3.8 2.9 5.0 81 5.0 2.5 2.5 4.6 2.5 4.6 15 2,0 5.0 4.2 2.9 3.3 11 4.6 2.5 2.5 4.6 3.8 3.3 16 17 18 2.9 4.6 3.8 2.9 3.8 9.5 219 3.3 3.3 3.3 5.5 3.8 19 2.9 3.8 4.2 2.9 4.2 4.6 288 2.9 2.9 2.9 5.5 2.5 20 3.8 15 4.2 2.9 3.8 4.2 33 3.3 3.3 2.5 4.2 2.5 21 5.0 15 *.2 2.9 3.3 3.8 175 3.3 3.3 2.5 2.9 3.3 22 4.2 4.6 3.8 1,110 2.9 3.8 237 5.0 3.3 2.5 3.8 3.3 23 4.6 4.2 4.6 739 4.2 3.3 14 2.0 2.9 2.9 3.3 3.3 2* 4.2 4.2 165 1.6 3.8 3.8 2.0 3.3 25 2.5 3.8 4.6 524 4.2 4.6 11 5.9 1.6 3.8 2.5 3.3

26 1.6 3.8 4.6 48 3.8 27 28 2.9 3.3 9.5 19 2.9 '183 29 2.5 3.3 4.6 B.9 17 4.6 2.5 3.3 3.3 4.6 30 2.5 2.9 4.2 14 3.8 4.6 3.3 3.3 5.9 » 2.9 31

MAX 6.S 262 5.9 5.0 5.9 183 MIN 1.6 1.6 2.9 1.6 2.9 3.3 3.8 1.6 1.6 2.5 1.4 2.0 215 225 230 622 6 AC-FT 17,140 4 AC-FT 27,460

DISCHARGE, IN CU !IC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968"" DAY JUN JUL AUG SEP

3.3 2.0 20 3.3 7.1 11 184 5.9 1C 4.6 5.9 7.1 181 7.1 9.5 5.0 6.5 5.9 3.8 1.6 3.3 7.7 4.6 B.3 11 5.5 12 5.5 8.9 8.9 11 5.5 11 7.1 3.8 2.0 4.2 3.3 5.0 11 5.9 5.5 10 5.9 9.5 5.0 4.6 2.5 4.6 2.9 4.2 105 5.9 5.5 7.7 8.3 10 5.9 4.2 2.5 13 3.3 3.3 278 5.5 5.5 7.7 6.5 37 5.5 4.2 2.5 43 3.8 2.9 2,350 5.5 5.5 7.1 6.5 5.5 6.5 I 2.9 2.9 3.3 3.8 16 S7 5.9 5.5 10 5.9 9.5 7.1 1 3.3 2.9 3.0 25 3.8 13 7.1 7.1 10 6.5 9.5 5.9 1 3.3 2.9 2.5 4.2 3.8 13 8.3 7.1 10 5.9 9.5 5.9 13 3.3 3.3 2.9 3.3 82 40 4.6 7.1 11 5.5 11 5.9 14 2.5 3.3 2.9 3.J 67 12 4.2 7.7 13 7.7 14 5.0 15 12 10 11 5.5 .8.9" 16 2.0 3.3 2.9 5.5 5.0 6.3 4.2 5.5 11 8.9 5.9 17 2.5 3.3 3.3 4.2 20 39 4.2 5.9 11 9.5 7.1 6.5 18 1.6 2.9 848 3.8 5.9 11 4.2 5.5 19 2.5 708 442 3.8 5.9 8.3 5.5 5.5 7.7 8.9 9.5 5.9 20 2.9 156 24 2.5 5.9 8.3 8.9 6.5 5.9 10 8.9 5.9 21 4.2 1,250 5.9 3.3 22 3.8 42 2.9 2.9 5.9 16 7.7 7.1 5.9 8.3 5.5 5.9 23 2* 3.3 3.3 3.3 2.9 12 7.7 5.5 7.1 7.1 8.9 4.6 7.1 25 2.9 2.9 3.3 2.9 6.5 7.1 26 27 3.8 3.3 4.2 131 8.3 6.5 5.5 7.7 7.1 10 5.0 5.0 28 3.8 4.2 3.8 47 6.5 6.5 5.5 6.5 5.0 29 4.2 5.0 29 7.1 30 3.3 441 31

MEAN 3.20 88. 9 MAX 4.6 1,250 848 131 87 2,350 184 10 13 29 37 B.9 MIN 1.6 1.6 1,060 SAN GABRIEL RIVER BASIN

11090700 COYOTE CREEK AT LOS ALAMITOS, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

1 7.4 11 4.6 4. 13 50 24 10 7.4 8.8 8.8 5 2 5.5 9.4 4.6 5. 10 45 24 11 8.1 8.8 8.8 4 3 B.I B.I 6.? 6. 10 39 153 8.B 7.4 9.4 8.8 4 4 B.B 35 6.8 7. 15 24 8.1 B.I 8.B B.8 B.8 5 5 7.4 8.1 B.B 4. 1,760 21 104 B.B B.B 9.4 9.4 5

6 4.6 7.4 6.2 4. 956 21 38 12 8.1 10 8.8 5 a 6.8 B.I 11 4. 47 17 3.4 11 6.1 B.I B.B 6 9 4.3 7.4 B.B 4. 17 13 3.1 11 6.1 6.8 B.B 6 10 5.2 8.8 11 12 87 7.4 12 6.1 7.4 B.B 6 11 5.2 8.8 65 3. 12 31 9.4 11 7.4 10 8.8 6 12 4.9 5.2 9.4 3. 15 19 9.4 10 8.1 12 9.4 6 13 6.2 5.2 5.5 155 15 88 12 B.B 9.4 5.5 9.4 6 u 7.4 4.9 8.1 746 11 19 13 7.4 8.1 6.1 10 6 15 6.2 91 B.B 19 298 17 9.4 7.4 6.B 7.4 10 6 16 4.6 19 41 B.B 138 12 11 B.I 10 6.8 10 6 17 4.6 3.4 6.2 8.8 11 11 15 B.B 8.1 7.4 9.4 6 IB 6.2 3.4 5.2 180 276 12 12 B.B B.I 8.1 10 6 19 7.4 3.7 4.9 626 165 11 16 B.I 8.B B.I 11 6 2J 6.B 4.C 30 3,860 39 13 16 B.I 9.4 6.8 12 B

21 6.2 4.0 7.4 1,410 U 382 13 B.B 8.8 7.4 10 22 11 4.3 5.5 231 580 58 13 B.8 9.4 9.4 6.8 : 23 16 4.0 6.B 53 2,370 15 10 16 8.8 9.4 6.8 6 24 6.8 5.5 6.8 1,760 2,070 13 13 B.I 9.4 B.I 6.2 B 25 7.4 5.2 43B 4,420 3,299 U 15 B.I 1C B.I 6.2 6 26 B.I 5.? 224 792 508 B.B 15 B.B 8.B 8.8 5.5 10 27 9.4 9.4 B.8 230 206 10 12 13 9.4 B.I 6.B 6 2B B.I 6.B 4.3 164 92 12 12 9.4 9.4 11 4.9 6 9.4 9.4 4.6 *

MEAN B.B3 1C. 4 31.6 478 465 36.3 20.7 9.76 B.3B B.55 B.25 6. MAX 53 91 43B 4,420 3,290 3B2 153 16 10 12 12 MIN 4.3 3.4 4.3 3.7 10 B.B 3.1 7.4 6.1 5.5 4.3 *

AC-FT 1 ,,160

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG S 6 2 4.3 4.9 6.B 4.6 4.9 97 6.B 4.0 7.4 4.2 6.2 6 3 6.2 5.2 10 4.9 5.5 10 6.8 4.3 8.8 4.0 7.4 5 5.2 10 8.1 6.2 6.B 389 7.4 5.2 7.4 4.0 6.8 I 6 4.9 579 15 5.2 7.4 16 10 4.9 3.7 4.3 5.5 4 7 4.9 440 20 6.B 10 11 7.4 5.5 4.3 2.5 5.5 5 8 4.9 4.9 19 6.2 11 8.1 7.4 4.6 4.6 3.7 6.2 B 9 4.3 3.4 21 77 84 B.B 5.5 5.5 5.2 4.0 5.2 10

U 6.2 4.3 9.4 108 191 10 B.I 6.8 4.3 4.9 6.2 12 5.5 4.9 6.8 138 B.B 11 5.2 4.9 5.5 4.9 4.3 8 13 5.5 6.2 9.4 4.9 7.4 11 4.9 5.2 7.4 5.5 5.2 B 14 6.2 8.1 8.8 100 7.4 9.4 7.4 5.5 8.1 7.4 8.8 8 15 6.8 8.8 8.1 66 B.I B.I 11 4.6 8.8 9.4 11 10

16 6.8 11 5.5 606 B.B 7.4 U 5.5 9.4 8.1 6.2 17 6.8 11 13 54 B.B 10 B.I 7.4 B.B 6.2 B.I 18 5.5 12 15 10 8.8 19 11 8.1 5.2 4.3 6.8 19 4.6 6.8 9.4 10 5.5 6.8 6.B 6.B B.I 4.3 4.9 7

21 7.4 6.B 13 8.8 3 22 5.5 6.2 11 3 23 5.2 6.2 8.8 7.4 7.4 19 4.9 5.5 4.9 3.7 8.1 3 25 6.B 4.9 4.9 6.2 B.I 15 7.4 6.2 5.2 7.4 11 I 26 6.8 6.2 13 9.4 7.4 B.I 7.4 11 5.0 8.1 B.B 8 6 28 10 6.2 4.9 6.8 560 6.2 7.4 7.4 4.8 6.6 7.4 5 30 6.2 7.4 7.4 5.2 12 4.9 5.2 4.4 4.6 4.0 4

TOTAL 194 MEAN 6.15 6. MIN AC-FT 378 2,390 600 3,240 3,990 3,760 377 334 415 > LOS ANGELES RIVER BASIN

11092450 LOS ANGELES RIVER AT SEPULVEDA DAM, CALIF. LOCATION.--1

1.8 miles southwest of Van Nuys. DRAINAGE AREA.--158 sq mi. PERIOD OF RECORD.--January 1929 to February 1938, May 1938 to September 1970 L Monthly discharge only for 1929 Septembe

of changes prior to Aug. 30, 1953. AVERAGE DISCHARGE.--40 years (1929-37, 1938-70), charges, 20 cfs (14,500 acre-ft peryearj.

ed in the following"table daily Di scharge G.H. Dat Di: 1966 13,000 10.98 De<:. 18,, 1965 1967 7. 1966 11,000 9. 70 Noif. 25,, 1966 1968 8. 1968 11,300 9.91 Aplr. 1., 1968 1969 25, 1969 13,800 11.42 Ocl:. 31,, 1968 1970 8,180 7.92 Noir. ll!, 12, 1969

Period of record: Maxim charge 20, 1930. Flood of Mar. 2, 1938, 12,000 cfs (estimated) REMARKS.--Re

Angeles Ri

REVISIONS (WATER YEARS).--WSP 1315-B: 1945(M). WSP 1928: 1958-60(M), drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

1 36 26 12 54 78 18 32 26 2 6. 10 8. 2 34 30 11 30 34 18 30 27 2 6. 9.7 3 33 32 9.T 24 12 17 30 26 4 6. 8.5 4 39 33 7.4 22 9.7 16 32 22 4 6. 9.7 ' . 5 27 25 6.9 2C 10 12 28 9.1 4 6. 9.7 6 30 9.7 9.7 16 861 1-2 30 9.1 5 9.1 9.1 7 28 9.1 7.4 14 69 12 30 9.1 3 LO 8.5 8 30 9.7 7.9 12 24 12 30 9.1 2 1 9.7 9 30 12 40 11 13 13 30 52 7.4 1 10 10 30 11 198 11 14 12 30 11 9.1 9.7 10 1 27 13 9.1 10 11 16 28 7.9 9.1 D 9.7 2 28 14 69 B.5 10 30 33 9.1 9.1 0 9.7 . 3 30 12 8.5 7.9 9.7 30 33 9.7 11 1 9.7 4 28 495 132 14 11 30 33 9.1 12 2 10 5 26 982 9.1 8.5 11 32 34 9.7 9.1 1 10 6 27 1,960 4.2 5.9 10 32 36 1 8.5 1 10 7 2B 3.670 4.6 6.9 10 32 34 2 8.5 0 1C 8 26 569 3.8 7.4 13 32 34 2 7.9 1 9.7 9 25 247 4.2 9.1 13 28 33 4 7.4 1 9.1 0 26 68 6.4 9.1 9.1 28 33 4 6.9 1 9.1 .1

1 28 13 9.1 9.1 9.7 30 32 4 6.4 0 7.4 2 30 3,820 19 10 8.5 30 28 3 6.4 0 7.9 3 26 811 9.7 11 13 22 26 3 6.4 0 9.1 4 26 1.410 8.5 11 16 45 26 5 5.9 0 9.7 5 25 335 7.4 11 15 45 28 6 5.9 0 10 8 6 26 42 6.9 10 14 28 28 4 6.4 0 10 8 7 27 19 7.4 8.5 13 28 27 4 6.4 0 10 8 8 27 12 18 B.5 15 28 26 3 6.9 0 10 1 9 26 11 6.570 8.5 30 27 3 6.9 0 11 a 0 6.9 0 11 2 I 26 106 20 32 12 .__ 0 10

AN 28.1 491 247 X 15 12 11 45 N 25 9.1 3.8 5.9 8.5 12 26 7.9 5.9 6.4 7.4 8.5

) 1,410 172 0 0 0 787 1,190 129 0 0 0 505 MIN 3.8 AC-FT 65,410

t WATER, IN ACRE-FEET, RELEASED FROM CITY OF LOS ANGELES DISTRIBUTING RESERVOIRS TO LOS ANGELES RIVERi THIS IS INCLUDED IN FLOW THAT PASSES STATION. LOS ANGELES RIVER BASIN

11092450 LOS ANGELES RIVER AT SEPULVEDA DAM, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

I 30 34 5.4 5.4 15 13 315 .9 7.9 8.5 6.4 23 2 28 36 271 5.0 12 8.5 26 .4 5.9 7.9 6.4 11 3 27 38 1 ,150 6.9 6.9 8.5 16 4 27 4C 31 5.9 4.6 8.5 203 .9 5.9 7.9 7.' 5.9 5 28 40 1 ,420 1 5.4 7.9 7.' 5.9 6 30 44 1 ,630 9.8 5.0 6.9 5.4 33 5.4 7.9 , 8.5 7 30 4,160 129 5.4 6.9 '6.9~b.9 126 33 5.0 7.9 .< 9.1 9 30 57 24 5.C 9.7 14 34 5.0 6.9 . 9.7 "» 30 15 12 5.4 6.9 , 9.1 ID 28 11 5.9 9.7 5.4 6.9 16 36 7.4 6.9 , 7.9 11 27 7.9 5.0 11 5.. 111 445 9.1 8.5 6.9 8. 8.5 12 27 7.9 8.6 7.4 5.0 571 16 15 9.1 7.4 7. B.5 13 27 7.9 8.4 5.9 5.0 323 6.9 30 9.1 7.9 7. 7.9 1* 26 7.4 6.4 5.9 5.9 S4 5.0 30 9.1 7.9 7. 7.9 15 27 8.5 5.0 5.9 6.4 8.5 5.0 30 9.7 7.9 8. 7.9

16 27 11 6.9 5.0 7.4 5.0 33 9.7 7.9 8. 6.4 17 32 9.1 .4 15 5.0 8.5 5.0 34 9.1 7.4 7. 5.9 18 34 7.4 .6 8.5 5.C 7.9 275 36 9.1 7.4 8. 6.9 19 9.1 7.4 8. 7.4 2C 38 289 .8 6.4 5.0 7.4 14 B.5 9.1 7.4 7. 7.4 21 38 20 8.8 5.9 5.4 8.5 134 8.5 9.1 7.4 8. 7.4 22 36 1C 6.9 2,140 5.D 25 155 8.5 9.1 6.9 8. 7.4 23 34 11 5.0 82 5.4 24 10 7.9 8.5 6.9 8. 6.9 2* 33 5.0 5.C 1,100 5.C 24 120 7.9 7.9 6.9 8. 6.4 25 36 3.8 4.6 45 75 25 15 8.5 7.9 6.9 9. 8.5 26 33 4.2 4.6 20 5.9 25 26 T.9 7.9 6.9 9. 8.5 27 28 4.2 5.0 10 6.4 25 26 7.4 8.5 6.4 9. 7.9 28 8.5 6.4 9. 74 29 28 5.4 9.7 5.0 25 15 9.1 6.4 9.1 37 33 33 4.6 5.9 150 25 6.9 7.4 9.1 6.4 9.7 5.4 31 32 5.4 25

MEAN 155 120 8.72 18.4 MIN 26 3.8

(t) 1,540 333 D 0 0 264 149 394 0 0 C 0 MIN 3.8 AC-FT 33,500 t 4,460 WTR YR 1967 TOTAL 20,239. 3 MEAN 55.4 MAX 4,160 MIN 3.8 AC-FT 40,140 t 2,680 THIS IS INCLUDED IN FLOW THAT PASSES STATION.

DAY OCT NOV DEC JUN JUL AUG SEP 1 .4 30 36 31 7.9 5.0 224 8.5 6.9 7.9 7.4 7.4 2 .9 28 28 28 8.5 4.6 37 8.5 7.9 10 7.9 7.4 3 .4 28 24 30 8.5 4.6 4.6 8.5 9.7 10 7.9 7.9 * .9 28 23 30 10 10 7.9 5 .1 28 24 33 6.4 6.9 5.0 8.5 7.4 10 14 9.1 6 .1 26 25 32 5.9 5.4 4.2 8.5 6.4 10 8.5 11 7 1 26 36 32 5.9 690 3.8 8.5 0 .4 9.7 225 13 8 1 25 30 32 5.9 2,720 5.0 8.5 5.4 9.7 4.2 13 9 I 26 22 33 68 29 5.0 8.5 6.9 9.7 4.2 12 10 1 26 23 47 14 8.5 5.9 9.7 7.4 9.7 4.2 9.1

11 1 26 21 74 5.0 16 6.9 10 10 9.7 4.2 9.7 12 2 24 25 5.9 5.4 5.4 7.4 19 10 9.1 4.'2 10 13 2 24 24 5.0 121 164 6.9 9.1 10 9.1 4.2 11 14 2 24 22 5.0 8.5 16 6.9 9.1 9.1 7.9 4.2 9.1 15 2 28 23 5.0 5.0 11 6.9 9.7 9.1 7.9 5.C 9.7 16 2 28 24 5.0 5.4 12 6.9 12 9.1 .9 4.6 10 17 2 28 23 5.0 98 16 10 14 9.1 .9 4.6 16 18 2 10 .4 4.2 9.1 19 2 1,3^0 119 5.4 5.4 10 4.2 13 10 .4 4.6 9.1 20 2 853 38 5.4 5.4 9.7 5.9 14 9.1 .4 5.4 9.1 21 2 4,110 27 9.9 5.0 9.7 5.9 15 U 6.9 5.4 8.5 22 2 987 24 9.0 4.6 9.7 5.9 14 12 6.9 6.4 7.4 23 2 42 25 5.9 5.0 8.5 5.9 12 9.1 6.9 7.4 7.4 2* 2 30 25 6.4 5.0 7.9 6.4 13 8.5 6.9 7.4 7.4 25 2 27 25 7.4 5.0 8.5 6.9 15 9.1 6.9 6.4 8.5

26 2 25 26 7.6 5.0 8.4 7.9 20 9.7 7.4 7.4 8.5 27 2 26 26 217 5.0 6.9 7.9 16 9.7 7.4 9.1 8.5 28 30 30 27 20 4.6 6.9 9.1 16 8.5 7.9 9.1 7.4 29 27 26 27 6.9 4.6 6.4 8.5 10 7.9 7.9 9.7 6.4 30 28 644 32 6.9 5.9 8.5 7.4 7.9 7.9 8.5 6.4 31 32

MEAN 20.3 286 45.1 29.7 15.4 124 14.7 11.5 8.74 8.36 13.6 9.23 MAX 224 20 12 10 225 16

886 7,600 872 706 520 514 838 549 Ct) 831 1,060 1,220 369 0 0 0 0 0 0 0 0 CAL YR 1967 TOTAL 20,189.t> MEAN 55.3 MAX 4,110 MIN 4.6 AC-FT 40,040 t 3,920 MIN 3.8 AC-FT t 3,480 LOS ANGELES RIVER BASIN

11092450 LOS ANGELES RIVER AT SEPULVBDA DAM, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

I 6.4 3.1 6.C 7.4 33 81 19 15 16 12 17 6.9 2 6.9 b.O 6.3 8.5 27 73 38 15 17 15 25 7.9 3 9.1 4.B 6.0 7.9 23 66 20 15 17 18 19 7.9 4 7.4 9.7 6.9 7.9 23 62 19 24 16 32 10 8.5 5 3SB 60 185 10 16 26 10 9.1 6 1C 4.6 7.9 9. 1 11 9.1 7 9.7 5.0 7.4 9.1 78 50 16 10 17 27 9.7 9.1 8 6.4 5.C 9.5 8.5 52 46 16 10 16 27 15 9.1 9 6.9 5.0 9.1 9.1 42 46 16 10 16 27 11 8.5 10 7.4 9.6 7.9 9.7 40 185 16 11 16 33 11 7.9

11 7.4 6.4 51 9.7 33 46 17 13 16 133 10 B.5 12 7.4 4.6 5.4 9.7 54 40 20 12 18 34 9.7 8.5 13 7.9 4.2 5.4 191 27 33 23 10 17 32 9.1 7.4 14 81 4.2 5.0 615 23 28 14 11 IB 32 9.1 7.4 15 4.9 169 12 12 102 28 12 12 16 32 9.1 7.4 16 3.1 11 37 7.9 27 27 18 12 22 34 8.5 7.4 17 3.8 6.0 5.C 7.9 26 28 15 12 12 36 7.9 6.9 18 6.4 6.0 6.4 265 128 30 15 12 12 16 7.9 7.4 19 5.9 6.0 5.4 2,090 24 26 15 12 11 40 7.9 7.4 23 7.7 5.0 5.4 2,050 19 24 16 12 10 40 7.9 7.9 21 6.4 5.0 4.6 3,830 9.1 8.5 22 5.9 5.D 312 453 38 16 12 10 40 9.7 9.1 23 5.9 5.C 4.6 58 3,670 34 15 12 10 26 9.7 7.4 24 6.4 5.C 5.0 2,540 2,250 30 14 12 10 16 9.1 7.9 25 6.4 6.C 321 8,250 4.27C 21 14 12 10 13 7.9 7.4

26 6.9 6.C 1C3 2,670 374 20 14 12 11 17 7.9 6.4 27 7.4 6.C 9.7 352 301 19 15 12 11 16 7.9 5.4 28 7.4 6.C 7.9 231 415 19 15 16 11 17 7.4 5.9 29 13 6.C 10 BO 19 15 16 12 16 7.4 5.9 3: 28 6 .C 13 57 IB 15 17 12 16 7.4 5.9 31 7.4

230.3

MAX 61 169 321 4,270 255 185 24 22 133 25 9.1 HIM 2.7 3.1 4.6 7.4 19 18 12 10 10 12 7.4 5.4

(t) 0 0 0 0 0 86 0 0 30 1,396 69 0 MAX 2,720 MIN 2.7 AC-FT 16,990 t 369

t WATER, IN ACRE-FEET, RELEASED FROM CITY OF LOS ANGE _ES DISTRIBUTING RESERVOIRS TO LOS ANGELES RIVER; THIS IS INC -UDED IN FLOW THAT PASSES STATION.

DISCHARGE, IN CUBIC FEET PER SECOND, W ATER YEAR OCTOBER 1969 TO SEPTEMBER 197C

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 5.9 9.7 7.9 6.9 7.9 1,5 10 12 13 16 9.7 11 2 11 13 16 16 9.7 10 3 4.6 9.1 7.9 6.9 9.1 12 13 11 16 12 9.7 4 5.0 8.5 8.5 7.9 9.7 8 14 9. 9.0 12 12 8.5 5 5.0 7.9 8.5 7.9 11 1 15 9. 9.0 12 12 8.5 6 5.4 1, 050 8.5 7.4 11 16 7. 8.0 12 11 8.5 7 5.9 339 8.5 7.9 11 16 7. 8.0 12 11 9.7 8 5.9 7.9 8.5 8.5 12 16 7. 8.0 12 12 12 . 9 5.9 4.2 8.5 233 707 16 7. 1C 15 13 16 5.4 9.1 8.5 154 i.ieo 17 7. 10 12 43 15 1 5.4 3.1 8.5 117 141 17 7. 1C 11 13 14 2 6,4 3.1 8.5 26 20 18 7. 1C 12 13 12 3 6.4 3.4 8.5 9.7 9.7 20 8. 11 13 12 9.1 4 6.4 3.4 8.5 30 7.4 22 7. 12 14 14 8.5 5 7.4 3.B 8.5 16 6.4 .7 16 10 12 13 11 8.5 16 7.4 3.8 8.5 729 6.9 .9 16 12 12 12 12 9.7 17 8.5 3.4 8.5 25 7.9 .4 16 9.7 12 11 15 10 IB 6.9 3.4 8.5 14 6.9 .9 15 0 12 12 10 10 19 7.4 3.8 8.5 9.1 5.9 .9 15 2 12 13 10 10 20 7.9 5.4 8.5 7.9 6.4 .4 15 2 11 14 10 9.7 21 9.7 8.5 8.5 8.5 7.4 .4 14 1 10 17 9.1 12 22 10 8.5 9.7 7.9 7.4 .9 15 2 11 19 8.3 12 23 10 9.1 9.1 8.5 7.9 .4 12 3 12 19 9.7 9.7 24 10 7.4 7.9 30 8.5 .1 13 6 10 15 9.7 11 25 9.7 7.4 7.9 8.5 0.5 1 12 7 9.7 13 9.7 11 26 11 8.5 7.9 8.5 8.5 11 6 10 9. 9.7 11 27 11 7.4 7.9 7.9 9.7 9.7 4 10 9. 10 9.5 28 11 6.4 7.4 7.4 1,930 9.7 2 1C 9. 10 9.1 29 10 6.9 6.4 7.4 10 2 11 15 11 10 30 9.7 7.4 5.4 7.9 12 3 14 9. 12 9.1 31 TOTA MEAN 7.60 52.3 8.14 49.7 149 109 14.4 11.1 10.8 13.1 11.2 10.5 MAX 11 1,930 1,540 22 17 16 19 15 16 MIN 8.5 8.5

WTR YR 1970 TOTAL NOTE. CITY OF LOS ANGELES REPORTS NO WATER RELEASED DURING YEAR. LOS ANGELES RIVER BASIN

11093000 PACOIMA CREEK NEAR SAN FERNANDO, CALIF.

LOCATION.--Lat 34°20'07", long 118°23'50", in SEScNESc sec.24, T.3 N., R.15 W. , Los Angele County, on right bank 500 ft

RAINAGE AREA. --28. 3 sq mi (revi sed).

ERIOD OF RECORD. --March to July 1916 (fragmentary) , December 1916 to September 1970. AGE. --Water-stag t (f graphic map) . See WSP 1928 for history of changes prior t VERAGE DISCHARGE .--53 years (1917-70), 9.71 cfs (7,030 acre- ft per year) ; median of yearly mean discharges, 4.2 cfs (3,000 acre-ft per ye ar). -Maximu (discharge eet per second, gage height in fee t) for th 1966-70 are co ntained in the following t able:

Maxi mum Mini mum daily tr yr Date Dis charge G .H. Date Discharge 966 Nov. 23, 1965 664 4 .48 Most of time C 967 Ju ly 6, 1967 197 2 .10 Long periods c 968 Nov. 22, 1967 106 1 .26 do . 969 Feb. 25, 1969 2,300 Oct. 10, 19t>8, to Ja n. 21, 19 69 970 Mar. 3, 1970 153 1 .71 Long periods i Peri od of record: Maximum discharge, 2,440 cfs Mar. 3, 1938; no flow for several months in mos t years.

-EMARKS . - - Flow regulated since February 1929 by Pacoim -ft, diagram

OOPERATION.--Records furnished by Los Ange les County Flood C ontrol District and reviewe d by Geol ogic al Survey. IEVISIONS (WATER YEARS) . - -WSP 88 1: 1938 (M) . WSP 1041 : 1944(M). WSP 1285: 1951-52.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEI" BER 1966

AY OCT JUL AUG SE I 0 96 112 .10 .10 16 0 18 0 2 0 102 112 . 1C .10 13 0 17 0 3 0 130 92 . 10 .10 .10 0 5 .8 0 4 0 117 77 .10 .10 .10 0 .1C 0 5 0 119 76 .1C .10 .10 0 .10 C 6 0 117 74 .10 .10 . 0 0 C 0 7 0 116 72 .10 .10 . 0 c 0 0 8 0 117 72 .10 .10 . 0 0 £ 0 9 0 61 72 .13 .10 . 0 0 0 0 10 0 44 72 .1C .10 . 0 c 0 0 11 c 80 66 .10 .10 14 0 0 0 2 c 38 64 .10 . 0 06 0 0 Q 3 c 120 61 .1C . 0 34 0 0 0 4 c 55 60 .10 . 0 6C c 0 0 5 0 40 60 .10 . 0 52 0 0 0

6 0 70 60 .10 . 0 41 0 0 0 7 0 48 58 .10 . 0 37 0 0 8 0 0 56 .w . 0 41 0 0 0 9 c 0 90 .10 . 0 19 0 0 0 0 0 0 109 .10 .20 18 0 0 0 1 0 0 108 .10 .20 0 0 0 0 2 55 0 1C6 .10 .20 C 0 0 0 3 480 0 10 .10 .20 0 0 0 0 4 389 0 10 .10 .20 0 0 0 0 5 330 0 12 .10 .20 0 28 0 0

6 155 0 8 . 1C .20 0 3 0 0 7 120 0 8 .10 .20 0 5 0 0 8 123 86 6 .10 .20 0 8 0 0 9 139 78 .10 .20 0 9 0 5.9 0 136 116 .1 9.1 0 9 0 8.3 1 .1 14 9 0

TAL 0 251.80 0 0 41 .00 14.2 AN 0 64.2 60.3 74. .10 .87 41.7 0 0 5.84 1 .32 .47 X 0 480 130 12 .10 14 160 0 0 43 18 8.3 IN 0 0 0 .10 .10 .10 000 C 0 0 C-FT 0 3,820 3,710 4,570 5.6 54 2,480 0 0 359 81 28 11093000 PACOIMA CREEK NEAR SAN FERNANDO, CALIF.--CONTINUED

YEAK OCTOB ER 1966

DAY ncT NOV JUN JUL AUG SFP

1 0 127 C 118 8.9 .30 . C 2 6.8 : 0 0 111 0 3 112 12 .40 . C 3 6.C J 3 1.3 101 C 0 98 16 .40 . C 4 5.8 C C 4.0 99 0 0 98 2C .40 . .. 5 5.8 C " 3.1 97 .10 0 98 22 30 . C

6 5.8 0 t.j 96 .13 0 98 22 48 .2C 7 5.3 .40 74 3.0 94 .10 3 96 56 93 24 8 4.4 .20 46 3.0 92 .13 0 7C 91 33 88 9 4.4 .10 37 3.0 29 .10 0 60 89 03 43 K, 4.5 .10 32 3.0 14 .10 91 73 97 12 15

11 4.2 0 18 3.3 14 .10 31 72 96 19 19 12 4.2 0 11 3.0 14 1.0 98 72 80 19 29 13 4.C 3 16 3.3 14 ?7 121 67 57 62 25 14 4 . C 37 3.0 14 26 41 66 47 9.7 23 15 4.0 i 50 3.0 14 31 0 66 17 .3D 11

16 4.1 0 D6 2.8 14 02 j 66 9.9 .20 35 17 3.1 0 53 2.8 5 .4 02 C 66 9.9 .20 0 18 2.6 0 46 2.8 0 01 14 67 9.9 1.0 0 19 2.8 0 99 2.8 0 01 81 67 10 4.3 0 2C 1.4 0 11 2.8 0 01 100 67 6.0 3.7 0

21 .2: o 5.0 2.8 0 Cl 103 67 .30 2.2 0 22 .10 u 5.; 6.4 0 00 100 67 .20 2.2 0 23 .10 D 2.5 56 0 OC 120 67 .2C 2.2 0 24 0 0 0 31 J OC 133 67 .30 2.2 0 25 0 C 0 102 .1C 99 151 67 .30 2.2 0

26 0 C 0 105 0 60 144 28 .30 2.2 0 27 0 0 0 10C 0 14 144 9.6 .3C 2.2 C 28 0 C 0 90 0 26 145 9.2 .30 2.2 0 29 0 0 0 26 149 .30 2.2 0 30 0 -j 0 60 6.3 123 P ' .30 2.2 0 31 o ______0 100 1.9 1.9 0

TOTAL 0 KEAN C MAX 7.0 .40 156 105 127 131 151 118 97 193 188 c Min 0 0 r- o 0 C 0 8.2 .20 .20 v 0 AC-FT 180 1.6 0

00 MEAN 15 4 MAX 160 KIN 0 AC FT 11 130

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

DAY OCT NOV ncr JUN SEP

1 0 .10 1.6 7.5 13 0 .10 0 2 C 0 12 .10 .20 .30 13 0 0 0 3 j c 20 .10 .20 .20 12 0 3 0 4 3 20 .10 .10 .20 10 c ^ 0 5 C 0 16 i.7 .10 .10 ID 8.9 0 0

6 C 0 13 13 .10 .10 10 14 0 a 7 .80 13 1 i .10 .10 10 5.3 0 0 8 ; ?. 5 13 1 J .10 .10 10 .20 0 0 9 1.3 2.5 12 1 J . 10 .10 10 .20 c 0 i: 3.7 2.5 12 13 .10 .10 10 9.0 0

11 3.8 2.5 14 13 8.3 .10 13 15 0 0 12 3. d 2.5 14 1 12 .10 10 15 0 0 13 2.9 2.5 14 1 6.3 .10 10 15 0 0 14 2.2 2.5 14 .3 7.0 .10 9.9 14 c 0 ID 2.2 2.5 11 .8 12 .10 9.4 14 0 0

16 2.2 2.5 9.8 .8 12 .10 9.4 14 0 0 17 2.2 2.5 9.8 .8 12 .10 5.7 14 0 0 18 2.2 2.6 9.8 .8 9.9 .10 .20 19 0 8.6 19 1.8 1.3 9.8 .8 8.9 .10 .20 21 0 4 20 .7C 1.2 9.8 .8 8.9 .10 .10 21 0 4

21 18 2.0 9.8 .8 8.8 .10 .10 7.2 3 4 22 83 2.0 9.8 .8 8.7 8.2 .10 13 0 if 23 102 2.0 9.8 .6 8.8 3 0 13 0 4 24 68 2.0 9.6 .6 8.9 3 0 13 0 3 25 0 2.0 9.6 .6 8.9 3 .10 13 0 3

26 0 9. 1 6.5 9.6 9.1 3 .10 13 0 3 27 0 17 .30 9 .4 9.1 3 .10 13 0 3 28 0 19 .20 e .9 9. 1 3 0 4.7 0 3 29 0 7.5 .10 < .7 9.1 3 0 .20 0 3 30 3 0 .10 9.1 3 0 .10 0 3 31 0 .10 7.1 0

TOTAL 0 300.00 93.50 302.90 261.70 198.70 122.10 173.40 289.80 .1 0 169.6 MEAN 0 10. 0 3.02 9.77 9 .02 6.41 4.07 5.59 9.66 .00 0 5 .65 MAX C 1C2 19 20 13 12 13 13 21 .1 0 14 MIN 0 0 0 0 .10 .10 .10 0 0 0 AC-FT 0 595 0 336

CAL YR 1967 TOTAL 10,505 60 MEAN 28.8 MAX 193 MIN 0 AC-FT 20, 840 11093000 PACOIMA CREEK NEAR SAN FERNANDO, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 PR MAY JUN JUL

1 13 0 72 524 51 26 7.4 .9 1.2 2 13 120 494 54 26 7.1 .7 l.l 3 12 0 154 452 62 26 7.2 .5 1.1 4 12 0 153 373 68 25 7.3 .3 1.1 5 12 0 297 241 71 25 7.4 .1 1.3

6 4.4 0 332 184 96 25 7.5 .9 1.5 7 .20 0 283 192 94 25 7.7 .9 1.9 9 .10 0 283 157 114 24 7.3 .8 2.4 9 .13 276 150 139 24 6.9 .7 3.1 1J 0 193 148 12B 24 6.5 .6 3.0

11 0 3 273 151 125 23 6.1 . 5 3.0 12 0 0 276 122 105 23 5.9 . tt 3.C 13 0 0 159 176 157 22 5.8 .4 2.B 0 0 105 132 22 5.6 .4 3.0 15 0 21 5.5 . 3 3.1

16 0 0 90 132 21 5.3 .2 3.2 17 1C1 84 120 2U 5.2 . i 3.J IB 3 J 1C1 82 7 0 20 5.1 .0 3.0 19 C 0 100 85 38 14 5.0 .9 2.9 lO'J 23 0 0 36 35 44 4.9 .9 3.0 21 0 0 97 90 30 99 4.B .9 3.1 22 0 36 90 90 35 57 4.7 .8 3.0 23 C KB 1C6 90 35 IB 4.5 .7 3.3 24 0 18 4.5 .6 3.0 25 0 729 1,470 54 30 IB .8 4.4 .5 2.9 26 0 1,140 1,490 52 30 18 9.4 4.4 .4 2.B 27 0 1,190 885 52 29 18 9.0 4.3 .3 2.B 28 0 933 635 52 29 IB 6.6 4.3 .3 2.7 29 C 314 25 28 18 8.2 4.2 .3 2.6 30 0 95 47 27 17 7.B 4.1 .2 2.6 31 0 64 TOTAL 66.80 " 0 MEAN 2.15 0 0 152 309 153 67 .8 25.7 12.4 5.6 4 2 25 2.54 13 0 C 7 .9 3.2 MIN

CAL YR 1968 TO TAL 1,595.10 ME* N 4.33 MAX 21 MIN C AC -FT 3,143

NOTE STAGE DISCHARGE RELATION INDEFINITE APR. 3 T 3 SEPT. 18.

DISCHARGE, IN CUBIC FEET PER SECOND , HATER YEAR OCTOBER 1969 TO StPTEMSER 1970 MAR APR MAY JUN JUL AUG SEP

1 2.7 C . 10 .20 3.0 4.1 3.5 3.6 3.3 3 .70 .80 2 1.9 J .20 .20 3.0 .70 3.5 3.6 3.3 5 .70 .60 3 0 .20 .20 3.0 3.5 3.6 3.3 3 .70 .80 4 0 .20 .20 3.0 25 3.4 3.6 3.3 2 .70 .SO 5 C C .20 .20 J.O 2.3 3.4 3.6 3.3 1 .70 .80 6 0 .2C .20 .20 3.0 7.6 3.4 3.6 3.3 0 .70 .80 7 0 0 .20 .20 3.0 5.8 3.4 3.6 3.3 0 .70 .eo a 3 3.0 .70 .80 9 3 . 0 .80 \J C .20 .20 .80 11 C G .2C 3.0 .3 3.6 3.2 2.0 12 0 3.0 .3 3.5 3.2 l.t .70 13 3 0 .20 .20 3.0 4.0 3 .3 3.5 3.2 l.t . 0 .7u 14 0 .20 .20 3.0 3.8 3 .3 .5 3.2 1. .80 .70 15 0 : .20 .20 3.0 3.8 3 .3 .5 3.2 1. .80 .70 16 0 0 .20 .20 3.0 3.6 3 .3 .5 3.1 1. .80 .70 17 0 0 .2r .20 2.9 3.6 3 .3 .4 3.0 1. .80 .70 18 0 .20 .20 2.8 3.7 3 .3 .4 3.0 1. .8 .70 19 0 0 .20 .20 2.8 3.8 3 .3 .4 3.0 1. .80 .60 23 .1C .20 .20 2.B 3.8 3 .3 .4 3.0 1. .BC .00 21 2.8 3.7 3 .3 3.4 3.0 1. .80 .60 .10 .20 .2J ) 22 0 .10 .20 .20 2.8 3.7 .3 3.4 3.0 1. .80 .60 23 0 2.8 .3 3.4 3.0 1. .80 .60 24 0 .8C . 0 25 C .80 . 0

26 0 .0 .20 .20 2.8 3.7 3 .5 3.4 3.0 1. .30 . 0 27 0 3 .6 3.3 3.0 1. .80 . 0 28 0 . 0 .20 .20 3.2 3.8 3 .6 3.3 3.0 1. .80 . 0 29 0 .10 .20 .20 3.8 3 .6 3.3 3.0 0 .80 . 0 30 0 .10 .20 1.5 3.7 3 .6 3.3 14 0 .80 .60 31 0 TOTAL 4.6 1.30 6.10 10.30 83.0 191.10 101 .4 107.6 104.9 391.90 23.50 20.90 MEAN .15 .043 .20 .33 2.96 6.16 3. 38 3.47 3.50 12.6 .76 .70 MAX 2.7 .20 .20 3.0 3.6 52 3 .6 3.6 14 45 .80 .80 MIN 0 0 .10 .20 2.8 .70 3 .3 3.3 3.0 .70 .70 .60 AC-FT 9.1 2.6 12

NOTE. NO GAGE-HEIGHT RECORD NOV. 20 TO JAN. 29. LOS ANGELES RIVER BASIN

11093490 NORTH FORK MILL CREEK NEAR LA CANADA, CALIF. LOCATION.--La upstream end of culvert on Angeles Forest Highway, 0.2 mile west of Hidden Springs and 8.8 mile

DRAINAGE AREA.--5.80 sq mi (revise

PERIOD OF RECORD.--Annual maximums 1960-66. June 1966 to Septe

GAGE.--Water-stage recorder and crest-sta ge. Altitude of gage is 3,060 ft (from topographic stage gage is at datum 4.66 ft higher.

EXTREMES.--Maximums and minimums (discharge in cubic feet p ond, gage height in feetj for the 1966-70 are contained in the following table: Minimum daily Wtr yr Date Discharge G.H. Date 1966 Dec. 29, 1965 480 12.21 Most of time 1967 Dec. 6, 1966 178 5.40 Oct. 1-5, 1966 1968 Nov. 19, 1967 43 2.82 Long periods 1969 Jan. 25, 1969 a!7.3 Oct. 23, 24, 1968 1970 Nov. 7, 1969b 1.91 Aug. 5 "to Sept. 15, 19-0

1,280 cfs Jan. 25, 1969 (gage height, 17.3 ft, from floodraarks), fr

nd 17.3 ft; no flc

DISCHARGE, IN CUBIC FEET PER SECOND, JUNE TO SEPTEMBER 1966

NOV DEC J«N F6B MAR APR MAY JUN

2.10 .068 .10 LOS ANGELES RIVER BASIN

11093490 NORTH FORK MILL CREEK NEAR LA CANADA, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 NOV OEC JAN FEB MAR APR MAY JUM JUL

0 .10 .10 .4 .0 1.0 1. 9 4.9 .4 1.2 .40 C .10 .4C .2 .C 1.0 1. 9 4.6 .4 1.1 .70 0 .20 18 .2 .C .80 2. 8 4.2 .4 1.1 .70 0 .30 1.8 .1 .0 .80 3. 7 3.9 .3 1.0 .50 0 .30 29 .0 .0 .70 3. 7 3.5 .3 .90 .4u .10 .60 114 .90 .90 .70 2. 7 2.8 .3 .9C .40 .10 6.5 50 .90 .90 .60 7. 7 2.8 .2 .80 .40 .10 1.8 7.0 .90 .90 .60 6. 6 3.2 .2 .90 .40 .10 .80 6.5 .80 .90 .50 5. 7 4.6 .1 . 8C .40 1 .10 .40 4.9 .80 .90 .50 4. 7 4.6 .1 .7u .4J .10 .40 3.9 .80 .80 1.8 9. 5 4.6 .0 .60 .40 .10 .20 3.9 .80 .80 5.3 7. 5 4.6 .0 .6C .40 .10 .20 3.5 .70 .80 17 7. 3 3.5 .5 .60 .40 .10 .20 3.2 .70 2.0 13 8. 3 2.8 .0 .6C .40 .10 .10 2.4 .70 2.2 5.6 8. 2 2.8 .0 .60 .40

.10 .2C 2.0 .90 2.2 3.9 6.5 1 2.0 .0 .60 .40 .10 .20 1.8 .4 2.2 2.8 9. a 1 1.6 .0 .60 .60 .10 .20 1.8 .8 2.0 2.2 9.0 0 1.6 .0 .60 .60 .10 .60 1.6 .2 1.8 2.0 9.0 9. > 2.0 .0 -6C .60

.10 .20 1.2 1 1.8 1.0 23 8. 1.6 .0 .50 .«0 .10 .10 1.1 1 1.8 .90 23 7. 1.6 .8 .50 .80 .10 .10 1.1 1 2.0 .80 22 1.6 .8 .50 .80 .13 .It 1.1 .5 2.0 .80 22 7. 1.6 .8 .5f .70 .10 .10 1.0 .0 1.5 .70 22 7. 1.5 .8 .4C .00 .20 .10 .9C .C 1.5 .6C 22 6. 1.5 .6 .40 .70

AL 3. JO 14.80 270.1(1 fl .60 43. 4C 74.80 328.5 3 1. 82.1 4 .8 2C.4G 16.50 N .097 .49 8.71 .76 1.4.4 2.41 11.0 2. 2.74 1 57 .66 .55 .20 6.5 114 19 2.2 17 23 I 4.9 .0 1.2 .80 N D .10 .10 .70 .80 .50 1.1 5. 1.4 .0 .40 .40

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 19 S7 TO SEPTEMBER AY OCT NOV OEC JAN FEB MAR APR MA If JUN JUL AUG SEP

.70 .0 .2 .1 1.1 .88 .70.7 ) .40 .1010 0 .70 .C .2 .0 1.0 .00 .7.70 ) .20 .1010 u .60 .1 .2 .0 1.0 .8 .8.80 ) .30 0 0 .60 .1 .2 .0 .90 .88 .8.80 J .50 0 0 .63.60 .1 .2 .0 .90 .66 .9.903 .80 0 0 .60 .0 .1 .0 .90 .80 .80 0 0 . 0 .1 .1 .0 2.5 .80 .60 .10 0 . 0 .C .1 .0 11 1.0 .50 .10 0 . 0 .1 .1 .2 4.2 .90 .50 .10 0 1 .0 .1 .4 .0 3.2 .90 .40 .10 0 . 0 1.0 .8 .0 2.2 1.0 .30 0 0 . 0 -8C .6 .90 2.1 1.1 .20 0 0 .60 .80 .6 .8 2.2 1.1 .40 0 0 .60 .80 0 (, .2 2.0 1.1 .20 0 0 .50 .90 0 .4 .8 1.6 .90 .20 0 0 .40 .80 ( .2 .8 2.0 .90 .10 0 . C .80 .90 .2 .8 2.0 .80 .10 '0 . 3 8 .70 1.8 .2 .6 1.8 0 .80 .10 0 .0 9 .60 21 .2 .4 2.0 80 .80 .10 0 .0 0 .60 5.0 .2 .4 2.0 80 .80 0 0 . C 1 .70 15 .2 .4 1.8 80 1.1 0 0 . C 2 .80 4.9 .2 .2 2.0 80 1.1 0 0 .0 3 .80 2.2 .2 .1 2.0 80 1.1 0 0 . C 4 .93 1.4 .2 .1 1.8 80 1.1 0 C 0 5 .90 1.0 .2 .1 2.0 80 .90 000 6 .0 .90 .8 .1 1.8 80 .70 0 0 0 7 .1 .80 .8 .0 1.8 80 .60 000 8 .1 .80 .2 .0 2.0 80 .60 .10 0 0 9 .1 .60 . .1 .0 2.2 80 .60 .10 .10 0 0 .1 1.8 .0 2.2 70 .70 .10 0 0 I .0 .2 2.0 .60 0 0

X 1.1 21 .0 .8 2.2 11 .8 1.1 .80 .10 .10 N .43 .60 90 .0 .90 .90 70 .60 0 0 0 75 53 14 1.4 1.6

23 MIN .40 110934911 NORTH FORK MILL CREEK NEAR LA CANADA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECONOi WATER YEAR OCTOBER 1968 TO StPTEMBER 1969 DAY UCT NOV JUN JUL AUG S6P

1 .03 .07 .09 ^ 18 23 12 8.0 2.4 .98 1.4 .86 2 .02 .06 .09 12 17 23 1? 8.0 2.4 .36 1.4 .P6 i .03 .06 .0° 12 16 22 15 8.0 2.2 .75 1.2 .86 4 .04 .'.7.07 .09 12 15 21 14 8.0 2.2 .86 l.l .E6 b .C2 .09 12 14 21 13 8.0 2.0 .98 1.1 .86

6 .f2 .J6 '.01.09 12 25 21 12 7.0 1.8 .2 1.1 .86 7 .04 .06 12 16 21 12 7.0 1.8 .4 .86 .86 J . -*4 .05 .09 12 15 20 11 7.0 1.6 .? .98 .86 9 .02 .05 .09 12 15 20 11 7.0 1.8 .2 .98 .86 10 .03 ,D5 .09 12 14 20 11 6.5 2.0 .2 .98 .86 11 ,C6 ,C5 .12 . 12 14 20 11 6.5 2.2 .4 .98 .86 12 .06 .C6 .09 12 13 20 11 6.5 2.0 .8 .98 .86 13 .05 .'.7 .09 ia 13 20 11 6.0 2.0 6 .98 .86 14 12 20 11 6.0 .6 ill* 15 .04 .12 .15 21 12 19 11 6.0 1.8 .6 .9H 16 .34 .:? .18 . 15 11 19 1C 5.5 2.0 .6 .98 1.1 17 .G4 .C7 .15 15 11 19 10 5.5 2.0 .4 .98 1.1 18 . 04 .06 . 15 25 10 19 1C 5.5 1.8 . 4 .98 1.1 19 .03 . ' 6 . 18 57 13 19 10 5.4 1.6 .4 .8 1.1 20 .03 .06 .18 7. 6 9.0 19 10 5.4 1.6 .4 .8 1.2 21 .02 .06 .57 56 8.0 19 9.5 5.4 1.8 .4 .8 1.2 22 .02 . j6 . 30 22 8. C 18 9.5 5.3 1.3 .2 .8 l.l 23 .01 ...6 .12 21 7.0 17 9.5 5.3 1.8 f 2 .7 .98 24 .01 .06 . 12 48 1C 15 9.5 5.3 1.6 .2 .7 .98 25 .02 .1,7 .25 180 75 15 9.0 4.9 1.6 .3 .7 .98 ?6 .03 .09 .30 50 43 14 9.0 4.2 1.6 .4 . 5 .98 27 .03 .09 .15 40 33 14 9.C 4.2 1.4 .4 . 5 .98 .C3 .L9 .15 30 25 13 9.0 3.5 1.4 .4 . 5 .98 24 .05 " .15 25 13 8.5 1.2 3- .06 . I/ . 15 22 13 8.5 1.1 .4 . 5 .98 31 .06 . 15 20 12 2.4 .4 TOTAL 1.07 .53 29.13 WEAN .035 .068 .15 16 .9 17.3 18.4 10.6 5.78 1.82 1 .31 .94 .96 MAX .\-6 15 8.0 2.4 i.a 1.4 1.2 WIN .Cl .C5 .09 12 7.0 12 ft. 5 2.4 1.1 .75 .75 .86 1 08 80 57 WIN 0 AC-FT 446 V.TR YR

NOTE, NO GAGE-HEIGHT RECORD JAN. 22-24, JAN. 26 TO MAR. 20, APR. 1 TO MAY 22.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 197C DAY OCT NOV JUL AUG SEP

1 .98 1.4 .2 2.4 2.0 .0 1.1 .36 .05 .05 .14 2 .98 1.4 .2 2.4 1.8 .8 l.l .36 .05 .05 .04 "4 3 .98 1.4 .2 2.4 1.8 .4 l.l .30 .05 .05 4 .98 1.4 .2 2.4 1.8 .4 l.l .30 .05 .05 .04 5 .98 1.4 .2 2.4 1.8 .6 1.1 .30 .05 .C4 .04

6 .98 2.C 1.2 2.4 1.8 .4 1.1 .21 .05 .04 .04 7 .98 1.8 1.? 2.2 1.6 .6 1.1 .15 .05 .04 .04 a .98 1.4 1.2 2.2 1.6 .4 1.1 .18 .05 .C4 .04 9 .86 1.4 1.2 2.8 2.0 .4 1.1 .21 .05 .04 L4 n .86 1.4 1.2 3.2 2.8 .2 1.1 .18 .05 .04 .34 11 .86 1.4 1.4 3.2 2.4 .2 1.1 .12 .05 .04 .04 12 .86 1.4 1.4 3.2 1.8 .2 1.1 .21 .05 .04 .04 13 .98 1.4 1.4 3.2 1.4 .4 1.2 .25 .05 .04 .04 14 .1 1.4 1.4 3.2 1.2 .4 1.2 .21 .05 .04 .34 15 .1 1.4 1.4 3.2 1.2 .2 1.2 . 6 .18 .05 .04 .04 16 .2 1.3 1.4 3.9 1.1 .2 1.2 5 .15 .05 .04 .05 17 .2 1.3 1.4 3.5 1.1 .1 1.2 5 .07 .05 .04 .05 18 .4 1.3 1.4 3.2 1.1 .2 1.1 5 .05 .05 .04 .55 19 .4 .3 1.4 3.2 1.1 .2 1.1 5 .05 .05 .04 .J5 2j .4 .3 l.f. 3.2 1.1 .2 .98 5 .05 .05 .04 .05 21 .0 .3 1.6 2.8 1.1 .2 1.1 5 .05 .05 .04 .05 22 .0 .3 1.6 2.4 l.l .2 1.1 5 .05 .05 .04 .05 23 .0 .3 1.6 2.4 1.1 .1 1.1 5 .05 .05 .04 .05 24 .0 .3 1.6 2.2 1.1 .1 .98 5 .05 .05 .04 .05 25 .8 1.3 1.4 2.2 1.1 .1 .98 5 .C5 .05 .04 .05 26 .8 1.3 1.4 2.2 1.1 .1 1.1 5 .C5 .05 .04 .05 27 .8 1.2 1.6 2.2 1.1 .1 1.4 5 .05 .05 .04 .05 28 .4 1.2 2.0 2.2 1.8 .1 1.2 5 .05 .05 .04 .05 29 .4 1.2 2.4 2.0 .1 1.2 5 .05 .05 .04 .05 32 .4 1.2 2.4 2.0 .1 1.2 7 .C5 .05 .04 .05 31 .4 2.4 2.0 .1 .05 .04 1.55 1.35 WEAN .29 1.37 1.49 2.66 1.50 1 48 1.12 .< 1 .15 .050 .041 .045 MAX 2.0 2.0 2.4 3.9 2.8 .0 1.4 1 4 .36 .05 .05 .C5 MIN .86 1.2 1.2 2.0 1.1 .1 .98 .< 9 .05 .05 .04 .04 AC-FT 79 82 92 163 83 91 67 6 8.7 3.1 2.5 2.7

HTR YR 1970 TOTAL 368.19 MEAN 1.01 MAX 3.9 MIN .04 AC-FT 730

NOTE. NO GAGE-HEIGHT RECORD .OCT. 31 TO DEC- 17, FEB. 10 TO MAR. 11, JUNE 19 TO SEPT. 30. LOS ANGELES RIVER BASIN

11094000 TUJUNGA CREEK BELOW MILL CREEK, NEAR COLBY RANCH, CALIF. Nationa

DRAINAGE AREA.--64.9 sq mi PERIOD OF RECORD.--January

GAGE.--Water-stage recorde graph! AVERAGE DISCH acre-£t pe

Wtr yr Date Discharge G.H. I960 Dec. 29, 1965 6,550 13. 75 . 4, 1965 1967 Dec. 6, 1966 1,630 9.22 -20, 24, 1 1968 Nov. 19, 1967 7.84 1969 Feb. 25, 1969 15.25 1970 Feb. 28, 1970 6.76

7,000 cfs; no flow at ti REMARKS.--No basins el COOPERATION.--Records furnished by Los Angeles County Flood Control District and reviewed by Geolo DISCHARGE, IN CUBIC FEET PER SECONP, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY HCT NOV DEC. JAN FEB MAR APR MAY JUN JUL J 9 11B 26 20 0 7.3 4. 0 .60 o ? 107 26 20 0 7.U 4. . (j .60 Q 7 96 25 9 0 6.6 4. . . 0 .60 L 5 8B 25 7 0 6.6 4. C .60 .10 5 86 25 7 0 6.8 4. c .«q .10 3 75 62 8 0 6.8 4. c .60; .n 2 63 65 B 1 6.B 4. C .4C . 2C 1 57 52 8 1 7.0 5. C .4p .20 1 51 41 8 I 7.6 5. 0 .40 .20 ft 46 36 8 0 8.0 4. c .49 .2C 0 45 33 7 10 8.0 4. c .4i .20 9 44 1C 7 9. 8.0 4. L 4C) .20 8 41 3C 6 9. 7.3 3. c .*q -4C 8 36 2B 5 9. 7.3 3. . . .40 .90 8 32 27 5 9. 7.3 3. C .40 . 3 « 30 25 4 9. 7.3 3. !. 0 .1,3 ?1 8 29 25 4 9. 6.8 3. 0 . 0 .1,3 16 7 29 25 3 C 6.6 2. 0 o .sd 2 6 29 24 3 0 6.3 2. 0 . 0 ,9Q 1 6 29 24 3 0 6.1 2. 0 C .70, , 4 29 23 3 0 6.1 2. 0 ( .60 94 4 28 22 3 0 6.1 2. 0 C .60 64 3 27 22 3 0 5.9 2. c 0 .6Q 72 3 26 21 6 9.4 5.9 2. 0 C .60 32 3 25 21 2 9.1 5.5 2. 0 c .6d 15 2 25 21 8 8.8 5.5 2. 0 0 J 10 2 25 20 5 8.6 5.5 2. 0 0 .60| 78 1 ?4 20 4 8.3 5.3 2. c 0 .61) 59 1,6 0 24 3 8.3 5.3 1. -8C j .60 48 5 5 28 12 7.6 5.1 1. .80 C .80| 3 25 11 5.1 c ______

0 118 91.8 45.7 29.4 15. B 9.71 6.54 3.4 1.00 C .551 0 942 1,640 118 65 22 11 8.0 5. 1.7 0 .90 0 C 11 24 20 11 7.6 5.1 1. .60 1 *«l LOS ANGELES RIVER BASIN

11094000 TUJUNGA CREEK BELOW MILL CREEK, NEAR COLBY RANCH, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 .80 1.0 2.4 11 36 12 29 89 30 12 6.3 3.7 2 .80 1.0 3.5 10 32 12 30 84 2B 12 6.3 *-2. 3 .90 1.0 111 9.7 28 12 34 80 26 12 5.9 4.2 4 .90 l.l 42 26 12 5.7 4.0 5 1.0 1.1 112 9.7 25 12 76 70 26 12 5.5 4.0 6 .1 l.l 814 9.4 24 12 54 64 25 12 5.5 4.0 7 .0 28 278 9.1 22 11 62 59 25 12 5.3 4.0 8 .0 IB 92 9.1 21 11 54 58 25 12 5.3 4.0 9 .0 4.7 40 8.8 19 11 48 5B 25 11 5.1 3.B 10 .0 3.2 27 8.8 IB 12 46 60 25 11 4.9 3.8 11 .0 3.1 25 8.8 15 12 74 59 24 10 4.9 3.7 12 .0 2.8 24 8.8 15 45 62 57 24 9.7 5.1 3.7 13 .90 2.8 23 8.8 15 148 70 53 24 10 5.3 3.7 14 .80 2.7 22 8.6 15 117 79 48 24 ID 5.3 3.6 15 .80 2.5 8.0 15 70 79 46 22 9.7 5.5 3.6 16 .80 2.4 17 15 53 70 21 9.4 5.5 3.7 17 .80 2.2 16 15 42 63 40 21 B.B 5.5 3.7 18 .80 2.2 15 7.6 15 39 90 39 20 8.6 5.5 3.B 19 .80 2.2 14 7.8 15 33 86 36 19 8.0 5.5 3.8 20 .80 2.8 13 8.6 14 28 76 33 IB 7.8 5.5 3.8

21 .90 3.0 13 8.8 14 26 94 31 IB 7.6 5.5 3.8 22 .90 2.6 12 25 14 24 142 31 17 7.6 5.5 3.B 23 .90 2.6 13 36 13 23 128 30 17 7.3 6.8 3.B 24 .80 2.6 13 147 13 23 135 30 17 7.3 4.6 3.8 25 .90 2.6 12 113 13 23 142 30 26 .90 2.6 12 67 13 22 154 30 15 7.3 3.7 3.7 27 .0 2.6 12 64 13 22 149 30 15 .8 3.7 3.7 28 .0 2.7 12 52 13 21 133 30 14 .B 3.7 3.6 29 .0 2.6 11 45 22 120 30 13 .6 3.7 3.6 30 .0 2.5 11 42 21 101 30 13 .6 3.7 3.6 31 .0 11 41 26 30 1,483 633 287.5 157.7 114.0 MEAN .91 3.74 59.4 26.4 18.1 30.9 84. B 47.8 21.1 9.27 5.09 3. BO MAX 1.1 28 814 147 36 148 154 89 30 12 6.8 4.2 MIN .80 1.0 2.4 7.6 13 11 29 30 13 6.3 3.7 3.6

MIN .40 AC-FT 10,660 MTR YR 1967 TOTAL 9,483 20 MEAN 26.0 MAX 814 MIN .80 AC-FT 18,810

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 196B

NOV DEC JAN FEB

1 3.6 2.4 22 13 14 11 IB 6.6 3.7 1.3 .90 .70 2 3.4 2.5 17 13 14 11 22 6.6 3.6 1.3 .90 . 0 3 3.4 2.5 14 12 14 11 18 6.6 3.4 1.2 .90 . 0 4 3.2 2.6 14 11 14 10 14 6.6 3.7 1.2 .90 . 0 5 3.1 2.6 13 11 13 9.7 13 6.1 4.2 1.1 .90 . 0

6 3.1 2.7 13 11 13 9.4 12 6.1 4.2 1.1 .90 . 0 7 3.1 2.7 13 11 13 11 12 6.3 4.3 1.0 .90 . 0 B 3.1 2.8 12 11 13 76 11 .3 4.2 1.0 .80 . 0 9 3.1 3.0 12 11 16 35 10 .6 3.4 1.0 .80 . 3 10 3.1 3.0 11 11 19 2B 9.4 .6 3.4 .90 .80 . 0 11 3.1 2.8 10 11 18 21 9.4 .8 3.1 .90 .80 . 0 12 3.1 2.7 9.4 10 18 19 9.4 .B 3.0 .90 .80 . 0 13 3.0 2.6 9.1 10 23 18 9.4 .8 2.7 .90 .90 .60 14 3.0 2.6 8.8 10 24 18 9.1 .8 2.7 .80 l.C .60 15 3.0 2.5 8.8 10 21 17 9.4 .6 2.5 .80 1.0 .70 16 2.B 2.5 8.8 10 19 16 9.4 .3 2.4 .80 1.1 .70 17 2.8 2.6 9.1 10 18 15 9.7 .3 2.2 .70 1.1 .70 IB 2.7 2.7 12 10 17 15 9.7 .3 2.1 .70 1.1 .70 19 2.7 285 12 9.7 16 14 9.4 .1 2.0 .70 1.1 .70 20 2.7 105 12 9.4 15 13 9.4 .1 l.B .70 1.1 .70

21 2.7 345 11 9.1 15 12 9.1 .1 1.7 .70 1.1 .70 22 2.6 122 12 8.8 15 12 B.8 .1 1.7 .60 1.0 .70 23 2.5 41 12 8.8 14 13 B.6 .1 .7 .60 .90 .70 24 2.4 26 14 B.8 13 13 8.6 .1 .6 .60 .80 .70 25 2.4 22 16 B.8 13 12 8.3 .5 .5 .60 .70 .70

26 2.4 20 8 9.1 12 12 8.3 4.9 .5 .60 .60 .70 27 2.4 19 8 16 12 12 8.0 4.5 .5 .60 .60 .80 2B 2.4 18 8 16 12 12 7.3 4.2 .5 1.2 .60 .80 29 2.4 18 6 15 12 12 7.3 4.0 .4 1.2 .60 .90 30 2.4 33 5 14 12 6.8 3.8 .4 .90 .60 .90 31 14 12 .70

MEAN .87 .69 MAX 3.6 345 22 16 24 76 22 6.B 4.3 1.3 1.1 .90 MIN 2.4 2.4 B.B B.8 12 9.4 6.8 3.7 1.4 .60 .60 .60

MIN .60 AC-FT 7,050 LOS ANGELES RIVER BASIN

11094000 TUJUNGA CREEK BELOW MILL CREEK, NEAR COLBY RANCH, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND. MATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DEC JUN JUL AUG SEP 1 .90 .90 1.2 1.6 131 666 101 52 31 9 11 6.3 2 .90 .90 1.3 1.6 61 484 103 52 31 8 11 6.3 3 .90 1.0 1.3 1.7 53 494 120 54 30 8 10 6.3 4 .90 l.C 1.4 1.7 52 415 103 56 30 8 9.4 6.3 5 .90 1.1 1.4 1.8 51 348 120 56 30 8 9.1 6.3 6 .90 1.2 1.4 1.9 519 275 126 56 30 8 8.8 6.3 7 l.C 1.2 1.4 1.9 24B 221 109 55 30 8 9.1 6.1 8 l.C 1.2 1.4 2.0 8 9.1 6. 9 1.0 1.2 1.4 2.1 178 197 96 50 32 8 8.8 6. 10 .90 1.2 1.4' 2.1 172 202 96 50 32 7 8.6 6. 11 .90 1.3 1.6 2.1 163 2C2 88 48 33 8 8. 6. 12 .90 1.3 1.6 2.1 153 197 83 45 32 9 8. 6. 13 .90 1.3 1.6 2.2 147 187 80 44 31 18 8. 6.3 14 .90 1.3 1.6 5.4 126 172 76 44 30 17 8. 6.8 15 .90 1.3 1.6 3.2 124 159 74 43 29 16 8. 7.0 16 .90 1.3 1.6 3.0 118 153 70 42 30 15 8. 7.3 17 .90 1.3 1.6 2.8 112 147 69 40 30 15 8. 7.0 18 1.0 1.2 1.6 3.2 122 143 69 40 29 15 8. 6.8 19 1.0 1.2 1.6 12 116 139 66 40 28 15 .8 6.8 20 1.0 1.2 1.6 116 15 .8 7.0 21 .90 1.2 1.6 1.060 105 161 61 38 28 14 .8 7.6 22 .90 1.2 1.6 185 1C1 161 61 37 27 14 .6 7.3 23 .90 1.2 1.6 89 24 25 58 36 24 13 .0 6.6 26 27 .90 1.2 1.9 739 1,110 28 54 35 22 12 .8, 6.3 2B .90 1.2 1.8 504 895 124 53 35 22 12 .8 6.1 29 .90 1.2 1.8 411 120 53 32 21 12 .8. 6.1 30 .90 1.2 1.8 307 114 52 31 20 12 .ff 6.1 31 .90

MEAN .92 1.19 1.72 323 > 495 214 79.8 43.3 28.1 1 5.5 8.20 6.51 MAX l.C 1.3 4.2 19 11 7.6 MIN .90 .90 1.2 1.6 51 109 52 31 20 11 6.6 6.1

DISCHARGE , IN Ct IBIC FEET PER SECOND, MATER YEAR DCTO >ER 1969 T 0 SEPTEMBER 1970 DAY OCT NOV DEC JUN JUL AUG SEP 1 6.1 7.6 9.1 8.8 8. 320 14 9.7 5.5 .8 1.3 1.3 2 6.3 7.6 9.1 8.8 8. 185 14 9.1 5.1 .5 1.4 1.3 3 6.3 7.8 9.1 8.8 8. 76 13 8.8 4.9 .2 1.4 1.3 4 6.3 7.6 8.8 8. 70 12 8.3 4.7 .2 1.4 1.4 5 6.3 8.0 9ll 8.8 8. 69 12 8.0 4.7 .0 1.4 1.4 6 6.3 14 9.1 8.6 8. 61 12 7.8 4.7 .9 1.4 1.4 7 6.1 18 9.1 8.8 8. 52 12 7.6 4.7 .8 1.4 1.3 8 6.1 11 9.1 8.8 8. 43 12 7.3 4.7 .8 1.4 1.2 9 6.3 10 9.1 9.4 17 36 12 7.3 4.7 .8 1.4 1.2 10 6.3 10 9.1 13 106 29 12 7.3 4.9 .8 1.4 1.2 11 26 11 7.3 4.7 .8 1.4 1.2 12 6.3 9.4 9.1 12 27 22 11 7.3 4.9 .7 1.6 1.2 13 6.B 9.4 9.1 .11 20 21 11 7.3 5.3 .7 1.7 1.2 7.0 9.4 9.1 11 16 20 11 7.3 5.3 .fc 1.7 1.5 15 7.0 9.4 9.1 11 13 19 11 7.3 4.9 .6 1.6 1.5 16 7.3 9.4 8.8 13 13 19 11 7.3 4.9 .6 1.5 1.3 17 7.8 9.4 9.1 12 12 18 11 7.0 4.7 .6 1.5 1.2 18 7.8 9.4 9.1 11 12 18 11 7.0 4.2 .5 1.5 1.1 19 7.6 9.1 9.1 11 13 18 11 7.3 3.B .4 1.6 1.2 20 7.6 9.1 9.1 11 12 17 11 7.3 3.6 .4 1.7 1.2 21 7.6 9.1 9.1 10 12 17 11 7.0 3.2 .4 1.7 1.2 22 7.8 9.1 9.1 10 12 16 11 6.8 3.1 .4 1.4 1.1 23 7.8 9.1 9.1 9.4 12 16 11 6.8 2.8 .4 1.4 1.1 24 7.8 9.1 9.1 9.1 12 15 11 7.0 2.8 .4 1.4 1.1 25 8.0 9.1 9.1 9.1 12 15 11 7.3 2.8 .3 1.4 1.1 26 8.0 -9.1 9.1 8.6 12 15 11 7.3 2.8 .3 1.3 1.0 27 7.8 8.8 9.1 8.6 12 15 11 7.3 2.8 .3 1.3 1.1 28 7.8 8.6 9.1 8.6 227 15 11 7.3 2.8 .3 1.3 1.1 29 7.8 8.6 8.8 8.6 15 11 7.0 2.8 .3 1.3 1.1 30 7.6 8.8 8.8 8.6 15 10 6.8 2.8 .4 1.3 1.1 31 7.6 8.8 8.3 TOTAL 219.5 284.7 280.9 306. S 700.2 1,308 344 230.3 123.6 5 .5 44.8 36.6 MEAN 4.12 1 66 1.45 1.22 MAX 8.0 IB 9.1 13 227 320 9.7 5.5 .8 1.7 1.5 MIN 6.1 7.6 8.8 8.3 8.3 IS 10 6.1 2.8 .3 1.3 1.0 AC-FT 435 565 557 608 02 89 73

7,800 LOS ANGELES RIVER BASIN

11095500 TIIJUNGA CREEK NEAR SUNLAND, CALIF.

LOCATION.--Lat 34°18'02", long 118°16'04", in sec.32, T.3 N., R.13 W., Los Angele County, on left bank 1,000 ft upstream from Gold Canyon, 2 miles upst from mouth of canyon, and 4 miles n rtheast of Sunland.

DRAINAGE AREA.--106 sq mi. PERIOD OF RECORD.--Octobe 1916 to September 1970. GAGE.--Water-stage record Flo different dati;

AVERAGE DISCHARGE.--53 years (21,520 acre-ft per year); median of yearly mean 15 cfs (10,900 acre-ft pe

EXTREMES.--Maximum, and minimums (discharge in c ibic feet per second, gage height in feet) for the 1966-70 are contained in the following table: Minimum daily Wtr yr Date scharge G.H. 1966 Dec. 30, 1965 5,220 14.55 Nov. 7-14,1965 1967 Dec. 6, 1966 1,900 11.75 Oct. 30 to Nov. 3, 1966 1968 Nov. 21, 1967 410 8.31 Sept.11, 12, 1968 1.3 1969 Feb. 25, 1969 21,300 a!6.23 Several days .80 1970 Feb. 28, 1970 560 6.88 Aug. 27, 1970 2.6

mum, 0.10 cfs

REMARKS.--Flo cre-ft, Gabriel Los Angeles R COOPERATION.--Re

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

NOV DEC JAN FES MAR APR MAY JUN JUL

1 .5 4.7 240 468 54 15 8.6 1 11 .8 8.0 13 2 .5 2.3 230 317 54 15 9.2 8 12 .8 9.2 13 3 .0 1.8 195 295 52 13 9.2 8 12 .8 12 12 4 .0 1.5 77 305 51 13 9.2 1 12 .2 12 12 5 .0 1.3 70 301 50 13 8.6 5 12 .2 12 12 6 .0 1.2 59 279 67 13 8.6 5 12 9.2 12 12 7 .0 1.0 55 267 21 13 8.6 8 13 9.2 12 12 8 .0 1.0 54 272 92 12 8.6 6 15 9.8 12 12 9 .5 1.0 55 225 90 12 8.6 3 15 9.8 12 12 10 .5 1.0 57 169 90 12 8.6 3 15 9.8 12 12 11 .5 1.0 52 134 90 11 8.6 3 13 10 13 12 12 .5 1.0 58 147 86 11 8.6 9 12 10 13 12 13 .5 1.0 51 140 84 11 8.6 6 11 11 12 12 14 .5 1.0 51 96 82 11 7.3 2 11 11. 12 12 92 11 8 11 11 12 12 16 .5 11 47 86 69 11 6.9 5 11 11 12 12 17 .5 183 45 86 69 11 7.3 1 11 11 12 12 18 .5 118 44 84 67 10 7.6 1 10 11 12 13 19 .0 73 42 32 64 10 7.6 1 10 11 12 13 20 .0 52 41 127 63 10 7.3 I 11 10 13 13 21 .0 46 41 172 59 9.8 6.9 1 11 10 12 12 22 .0 1,090 40 170 51 9.2 6.9 1 11 9.8 12 12 23 .0 2,850 39 167 49 8.6 6.6 8 11 9.2 12 12 24 .5 1,860 37 164 37 10 6.2 4 11 9.2 12 12 25 .5 627 37 175 17 12 6.2 4 11 9.2 12 12 26 .0 257 37 201 16 10 6.2 2 10 9.2 12 12 27 .0 144 31 175 15 10 6.2 2 1C 9.2 12 12 28 .0 253 23 112 15 10 6.2 0 10 9.2 12 12 29 .0 244 1,980 55 9.8 5.8 0 10 9.2 12 13 30 .0 240 1,510 62 --- 9. 5.5 0 9.8 9.2 13 13 31 .0 472 54 8. D 8.6 13

MEAN 6 10 269 188 177 58.3 11. 7.57 5 1 11.5 9.83 11.9 12.2 MAX .5 2,850 1,980 468 92 1 9.2 3 15 11 13 13 MIN .5 1.0 23 54 15 8. 5.5 0 9.8 8.6 8.0 12

WIN 80 AC-FT 30 70 MIN 1 0 AC-FT 46 40 LOS ANGELES RIVER BASIN

11095500 TUJUNGA CREEK NEAR SUNLAND, CALIF.--CONTINUED DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 DAY OCT NOV DEC JAN FEB MAR APR HAY JUN JUL AUG SEP 1 13 10 12 22 128 23 53 220 89 30 27 14 2 13 10 14 22 85 22 55 202 87 31 26 14 3 13 1C 157 38 70 22 47 202 85 32 26 14 4 12 11 42 85 48 22 47 180 85 33 26 14 5 12 11 B5 33 26 14 6 12 12 906 82 46 22 43 ,152 85 32 26 14 7 12 85 32 26 15 8 11 24 316 70 46 22 49 152 84 32 26 14 9 11 18 283 43 46 22 46 152 84 32 26 14 10 12 16 236 20 42 22 45 152 82 32 26 13 11 12 14 245 8 38 27 100 141 BO 31 26 13 12 12 14 240 8 37 78 70 127 80 31 26 13 13 12 13 232 e 37 172 65 123 78 32 26 13 14 12 13 154 76 32 26 13 15 12 76 32 26 13 16 12 13 61 7 37 88 76 113 74 31 26 13 17 12 13 29 7 37 78 74 94 74 30 26 [4 18 12 13 27 7 36 72 171 74 69 30 44 15 19 12 13 26 17 20 41 29 66 .6 21 12 14 25 18 34 65 258 85 40 28 95 16 2Z 12 13 39 29 121 16 23 12 38 28 121 15 24 12 13 23 216 33 43 242 85 36 29 119 16 25 12 12 23 225 35 42 228 84 35 28 1D1 16 26 12 13 22 175 34 42 225 84 34 28 17 20 27 12 12 22 162 32 2B 14 25 28 12 12 22 155 30 27 14 i6 29 11 12 22 150 41 248 89 28 27 13 26 30 10 12 22 14B 40 245 89 29 27 13 26 31 10 22 143

MEAN 11.9 14.5 124 71.3 44.1 78.5 138 121 62.8 30.1 40.6 16.0 MAX 13 54 906 225 128 198 293 220 89 33 121 '. b MIN 10 10 12 17 29 22 - 43 74 28 27 13 13

DISCHARGE, IN CUB 1C FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SI: 1 24 IB 33 63 38 24 18 13 9.0 36 3.6 2. 2 24 11 32 59 37 23 17 13 7.9 10 3.6 Z\ 3 24 10 31 4 24 9.6 30 46 36 23 13 13 7.2 5.2 3.4 2} 5 24 9.6 29 37 28 23 13 14 7.2 4.2 3.4 2 6 24 9.3 26 34 21 24 13 13 7.2 4.2 3.2 li 7 24 9.3 26 32 22 28 13 13 7.2 4.2 3.4 l t 8 24 9.3 24 28 22 72 13 14 7.2 4.2 3.4 1. 9 24 9.0 23 21 23 34 13 13 7.2 4.0 3.2 1. 10 23 9.0 23 22 24 31 13 14 9.0 3.4 3.0 1. 11 22 9.0 23 22 23 29 12 14 3 3.0 2.8 14 12 22 9.0 23 20 23 27 13 14 3 2.8 2.8 1. 13 22 8.6 23 19 31 26 12 14 3 2.B 2.8 1. 14 22 8.6 22 20 32 25 12 13 3 3.0 2.8 1. 15 22 8.6 22 20 28 25 12 13 3 3.2 3.0 1. 16 21 8.2 23 19 27 25 12 12 3 3.2 3.0 1. 17 20 8.6 24 19 27 25 11 12 2 3.0 3.0 It IB 20 8.6 33 19 27 24 11 12 2 2.8 3.0 1. 19 20 102 26 19 26 24 12 12 7 2.6 2.8 1. 20 20 101 26 19 26 24 12 11 7 2.6 2.8 1. 21 20 258 25 20 26 23 13 12 1 2.4 3.0 1. 22 20 275 24 20 25 18 14 11 6 2.4 3.0 1. 23 21 251 23 20 24 13 14 11 4 2.4 2.8 1.1 24 20 193 22 20 24 13 14 11 8 2.4 2.6 1. 25 20 130 22 20 24 12 14 10 2 2.4 2.6 1. 26 20 121 22 21 24 12 14 10 0 3.0 2.6 1. 27 20 103 22 29 25 12 14 10 0 2.6 2.0 1. 28 20 69 22 29 24 12 13 10 0 2.6 1.9 1. 29 18 48 32 29 24 12 13 10 9 3.2 2.0 1. 30 18 52 66 38 12 13 10 4 4.0 2.0 1. 31 19

MEAN 21.5 62.5 2B.O 28.3 26.8 22.9 13.2 12.1 . 8.9 4.56 2.67 1.7 MAX 24 275 66 63 38 72 18 14 89 36 3.6 2. MIN 18 8.2 22 19 21 12 11 10 7.2 2.4 1.9 1. 720 261 176 10 LOS ANGELES RIVER BASIN

11095500 TUJUNGA CREEK NEAR SUNLAND, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 JUN JUL 1 .0 1.0 .2 383 1,000 225 110 54 8 21 12 3 .6 1.0 .3 2 >6 816 271 108 60 9 20 11 4 .6 .90 .4 ; t I >9 533 268 115 58 0 19 H 5 .4 .90 .4 9 L7 786 329 120 55 0 18 11 6 .4 .80 .4 1,3 70 756 283 120 54 1 17 11 7 .2 .80 .4 1,0 10 547 215 120 54 3 16 11 6 .2 .80 .5 58 2 16 11 9 .0 .80 .5 ' 1 16 11 10 .5 .80 .6 ( 7 16 11

12 .8 .80 .7 >. 3 J7 327 202 103 63 5 16 11 13 .6 .90 .7 2 H 370 193 96 65 5 16 11 14 .6 .90 .7 1, 2 13 376 68 84 64 5 16 11 15 .4 1.0 .8 1 3 »8 4-22 152 82 45 4 16 11 16 .8 1.0 .4 1< 3 9 422 152 82 42 4 16 11 17 .5 1.0 .2 1, 2 >2 311 158 77 9.3 4 15 11 18 .4 1.0 .2 e .6 2 '3 330 182 74 48 5 15 11 19 .2 1.0 .2 I' 1 9 325 185 74 49 6 14 11 20 .2 1.0 .2 15, 2 2 312 132 74 51 4 14 11 21 1.0 1.0 .2 1,14( 220 169 130 74 53 9 13 11 23 .80 .90 .0 698 591 319 146 70 56 8 13 11 24 .80 4 13 11 25 .80 .80 4 13 11

27 .80 1.3 3 13 11 29 .80 1.1 .8 299 426 116 59 43 2 12 11

331 11.0 MAX 3.4 1.2 °0 8 550 9*250 1 000 87 21 12 MIN .80 .80 .2 1.9 199 251 68 53 9.3 22 12 11

CAL YR 1968 TOTAL 4,427.50 MEAN 12.1 MAX 89 MIN .80 AC-FT 8,780 .80 AC-FT 148,000

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 t J JL IUG SEP 1 16 19' 19 18 08 43 20 12 .2 3. 2 16 19 19 18 87 45 20 12 .2 4. 3 17 19 19 17 43 42 19 11 .3 4. 4 17 18 18 17 94 37 18 11 .3 4. 5 18 20 18 17 85 34 17 11 .4 3. 6 25 20 18 17 20 31 16 11 .4 3. 7 44 20 18 11 13 29 16 11 .5 3. 8 26 21 18 10 15 26 16 10 .7 3. 9 25 22 18 16 20 24 16 10 .8 3. 10 24 23 23 71 118 24 16 10 .1 3. 11 23 23 22 149 115 24 15 10 .3 2. 12 .4 3. 3 22 22 23 27 94 79 15 10 5 3. 4 22 21 22 21 62 101 15 10 .4 3. 5 22 21 21 22 59 34 15 10 .3 3. 6 21 21 26 24 58 34 15 9. .2 3. 7 21 20 29 21 57 32 14 9.( .1 3. 21 21 24 20 51 30 14 8. .0 3. 9 21 21 21 19 48 28 14 8. ) .9 3. 0 21 21 21 21 48 26 13 7. > .8 3. 1 21 20 21 21 47 24 13 7.( .6 3. 2 21 20 21 23 46 22 13 6. .4 3. 3 21 20 21 24 45 22 13 6.C .2 3. 4 21 19 20 25 44 22 13 6.() .1 3. 5 21 19 20 26 44 21 13 5.< .0 3. 6 21 19 19 26 44 21 13 5. .8 3. 7 21 19 19 27 44 21 13 5.< .6 3. 8 19 19 19 134 45 20 12 5. .8 3. 9 19 18 18 46 20 12 5.( .0 3. 0 19 19 18 46 20 12 4. .2 3. 1 19 18 45 12 _____ . .5

X I 6 44 23 29 149 208 101 20 1 .5 4. N I 2 16 18 18 10 44 20 12 4. .6 2. 2 ) < 20 203

NOTE. NO GAGE-HEIGHT RECORD DC.T. 1 TO NOV. 26, APR. 15 TO SEPT. 30. LOS ANGELES RIVER BASIN 33J

11096500 LITTLE TUJUNGA CREEK NEAR SAN FERNANDO, CALIF. rant, Los Angeles County, on downstre ide of Foothill

DRAINAGE AREA. --21. 1 sq mi. PERIOD OF RECORD. --October 1928 to September 1970. Monthly discharge for April 1931, published WSP 1315-B. GAGE. --Water -stage recorder. Concrete control since May 1 Datura of gage is 1,068.39 ft above mean se (levels by Los Angeles County Flood Control District). to Nov. 30, 1964, at datura 0.5 ft lower. AVERAGE DISCHARGE. --42 years, 2.61 cfs (1,890 e-ft pe of yearly mean discharges, 0.6 cfs (430 acre-ft per year). EXTREMES. --M 1966-70 are co ntained in the following table: Maximum Minimum Wtr yr Date Discharge G.H. Date Discharg( 1966 Nov. 22, 1965 1,300 3.98 Most of time ( 1967 Dec. 6, 1966 901 3.40 do. ( 1968 Nov. 19, 1967 112 3.23 do. ( 1969 Feb. 25, 1969 1,420 6.20 do. ( 1970 Feb. 28, 1970 353 4.11 do. ( od of record: Maximum discharge, 8,500 cfs (estimated) Mar. 2, 1938; no flow fo ever-al months in

tation. See sche-

COOPERATION.--Records furnished by Los Angeles County Flood Control District and reviewed by Geolog: cal Survey. REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN .JUL

10 9.0 7..D 4.0 Z.O

.20 Z.I, 1.7

1.7 .60 .80

.60 340 .40 150 .20 355 106

0 1,188.50 452.90 0 39.6 14.6 0 355 298 LOS ANGELES RIVER BASIN

11096500 LITTLE TUJUNGA CREEK NEAR SAN FERNANDO, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 DAY OCT NOV JUN JUL 1 0 0 0 2.4 0 B.4 20 .B 2 0 0 0 1.7 0 8.3 19 .5 3 0 46 0 .80 0 8.2 17 .5 4 0 9.5 0 0 0 8.1 16 .2 5 0 150 0 0 0 8.0 14 .2

6 0 358 0 0 0 11 14 .2 7 13 59 0 0 0 14 14 .5 8 0 22 0 0 0 17 13 .5 9 0 7.5 0 0 0 19 13 .5 10 0 3.5 0 0 0 22 13 .0

11 0 2.5 0 0 0 24 11 .5 12 0 2.1 0 0 24 21 9.0 . 1 13 0 1.1 0 0 43 19 B.5 ,5 14 0 0 0 0 37 17 8.0 .0 15 0 0 0 0 20 15 B.O 16 0 0 0 0 19 13 7.0 17 0 0 0 0 18 11 7.0 18 0 0 0 0 16 38 6.5 19 0 0 0 0 14 35 6.5 20 0 0 0 0 12 23 5.5

21 0 0 0 0 10 25 4.5 22 0 0 9.8 0 7.9 53 3.8 23 0 0 1.9 0 5.5 39 3.8 24 0 0 60 0 4.6 38 3.8 25 0 0 38 0 4.4 34 4.0

26 0 0 18 0 4.1 28 4.0 27 0 0 10 0 4.0 25 4.0 28 0 0 8.0 0 3.8 28 4.2 29 0 0 5.0 3.6 27 4.2 30 0 0 4.0 3.4 24 4.2 31 0 2.2 16 4.2 TOTAL 0 13 661.2 0 MEAN 0 .43 21.3 5.06 .18 8.72 22.0 8.86 1.37 0 MAX 0 13 358 60 2.4 43 53 20 3.8 0 MIN 0 0 0 0 0 0 8.0 3.8 0 0 AC-FT 0 26 1,313 311 9.7 536 1,310 545 81 0

DISCHARGE, IN CU 1C FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 196 DAY JUL

1 0 2.7 0 0 0 1.1 2 0 1.8 0 0 0 1.6 3 0 1.4 0 0 C 1.1 4 0 1.3 0 0 0 .20 5 0 1.4 0 0 0 .50 6 0 1.4 0 0 c .50 7 0 1.3 0 0 .40 .40 8 0 1.1 0 0 25 0 9 0 .90 0 0 6.5 0 10 0 .80 0 0 4.1 0 11 0 .80 0 0 2.2 C 12 0 .80 0 0 2.7 0 13 0 1.1 0 .20 2.3 0 14 0 1.6 0 0 1.3 0 15 0 .20 0 0 1.6 0 16 0 .30 0 0 1.8 0 17 0 .40 0 0 1.9 0 18 0 1.7 0 0 1.0 0 19 27 1.5 0 0 .70 0 20 16 1.1 0 0 .30 0 21 43 1.0 0 0 .10 0 22 16 .80 0 0 .10 0 23 3.9 .40 0 0 0 0 24 2.9 .10 0 0 .10 0 25 .90 0 0 0 .10 0 26 .60 0 0 0 0 c 27 .60 0 3.6 0 0 0 28 .60 0 .60 0 0 0 29 .30 0 0 0 0 0 30 11 0 0 . 0 0 31 ______0 1.0 0 TOTAL 0 122.80 25.90 5.20 .20 52.20 5.40 0 0 0 MEAN 0 4.09 .84 .17 .007 1.68 .18 0 0 0 MAX 0 43 2.7 3.6 .20 25 1.6 0 0 0 MIN 0 0 0 0 0 0 0 0 0 0 AC-FT 0 244 51 10 .4 104 11 0 0 0

WTR YR 196B TOTAL 211.70 MEAN .58 MAX 43 MIN 0 AC-FT 420 LOS ANGELES RIVER BASIN 333|

11096500 LITTLE TUJUNGA CREEK NEAR SAN FERNANDO, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL

0 28 94 8.0 8 2.B .50 0 21 77 B.O 8 0 13 58 0 8 D 9.0 47 1 8 0 8.0 34 3 7

0 95 39 4 2.8 0 84 39 4 2.9 0 61 36 4 3.0 0 43 32 4 3.1 0 28 26 4 3.2

0 20 24 3 3.3 0 18 22 2 3.2 .10 7.3 20 1 3.1 .10 2.1 19 0 3.0 2.9

18 .10 14 13 6.0 .0 2.6 0 19 .50 16 12 5.0 .7 2.4 0 20 25 14 12 4.0 .4 2.2 0

21 191 15 11 4.C .1 2.0 0 22 56 2_> 11 6.9 .8 1.8 G 23 15 278 10 9.8 .4 1.6 0 24 54 920 10 9.7 .1 1.5 0 25 166 1.180 8.6 9.6 .8 1.4 0

26 248 611 .3 9.5 .5 1.2 0 27 114 165 28 79 107 .5 9.1 .9 .BO 0 29 51 .7 .9 .70 0 30 33 .9 8.8 .9 .60 0 31 28 B.O .9 0

TOTAL 000 1,060.80 3,817.4 749.3 290.6 18 .1 69.50 33.70 MEAN 000 34.2 136 24.2 9.69 5 97 2.32 .12 MAX 000 248 1,160 94 14 .6 3.3 .50 MIN 0000 2.1 7.3 4.0 .9 .60 AC-FT 576 67 138

MIN 0 AC-FT 12 )

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

NOV DEC JAN FEB MAR APR MAY JUN JUL AUG LOS ANGELES RIVER BASIN

11097000 TUJUNGA CREEK BELOW HANSEN DAM, CALIF.

DRAINAGE AREA.--153 sq mi (revised).

PERIOD OF RECORD. --May 1932 to February 1938, August 1940 to Septembe 1970. Monthly discharge only for so periods, published in WSP 1315-B. GAGE.-- Water

1966-70 alre c

COOPERATION.--Records of diversion fur Ange ol District. DISCHARGE, IN CUBIC

1 0 0 12 0 0 2 005 0 0 3 001 0 0 4 0 0 B 0 0 5 008 0 0

6 005 0 0 7 000 0 0 B 007 0 0 9 007 0 0 0 006 0 0

1 005 0 0 2 145 0 5 0 0 3 2,320 0 6 0 0 4 1,810 C 0 0 0 5 241 0 1 0 0

6 006 0 0 7 0 0 0 0 B 0 0 0 0 9 0 0 0 o 0 0 29 0 0 1 577 0 o

TAL 3 4,516 606 4,3B 0 IB 0 4.7 0 AN 0 151 19.5 14 0 .58 0 .15 0 X 0 2,320 577 41 0 18 0 4.7 0 N 0 C 0 00000 -FT 0 8,960 1,200 8,70 0 36 0 9.3 0 t) 0 2,280 835 0 532 0

t COMBINED DISCHARGE, IN ACRE-FEET, OF CREEK AND DIVERSION. LOS ANGELES RIVER BASIN

11097000 TUJUNGA CREEK BELOW HANSEN DAM, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECDNOi WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

NOV DEC JAN FEB MAR APR MAY JUN JUL

103 12 91

IB 0 0 0 0 0 19 0 0 0 0 0 20 0 0 0 a 0 21 0 0 0 0 0 22 404 0 0 0 0 23 0 0 0 0 0 24 0 0 0 0 0 25 0_ 0 3 0 0 26 0 0 0 0 0 27 0 0 0 0 0 28 0 0 0 93 0 29 0 0 145 0 30 0 64 165 0 31 0 109

TOTAL 0 0 465.2 173 404.80 0 403 1,29 380 MEAN 0 0 15.0 5.58 14.5 0 13.4 41. 12.7 MAX 0 0 404 109 103 0 165 12 76 MIN 000 0 0 0 0 0 AC-FT 0 0 923 343 803 0 799 "2,56 754 (t) 0 0 5,970

WTR YR 1967 TOTAL 3,118.00 MEAN 8.54 MAX 404

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

NOV DEC JAN FEB MAR APR MAY JUN JUL *AUG

TOTAL 0 3. 0 0 0 0 16 0 .10 MEAN 0 .1 0 0 0 0 .53 0 .003 MAX 0 3. 0 0 0 0 16 0 .10 MIN 0 0 0 000 0 0 AC-FT 0 7. 0 0 0 0 32 0 .2 (t) 0 4,03 3 929 1,620 0 1,180 1,010 900 900

t 38,080

t COMBINED DISCHARGE, IN ACRE-FEET, OF CREEK AND DIVERSION. LOS ANGELES RIVER BASIN

11097000 TUJUNGA CREEK BELOW HANSEN DAM, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 JUN JUL AUG SEP 1 0 L.I 1,470 121 53 91 a .50 0 2 0 6.2 1,420 121 53 91 0 0 0 3 0 12 387 127 53 97 0 0 0 4 0 1.1 145 133 53 103 0 0 0 5 0 362 91 127 53 103 0 0 0 6 0 1,280 649 133 62 60 0 0 0 7 0 1,030 590 139 62 C 0 0 0 8 0 750 372 139 23 0 0 0 D 9 0 4*8 345 139 0 0 0 0 0 10 0 37 111 145 0 0 0 0 0 11 0 172 121 151 0 C o 0 0 12 0 286 257 151 0 c 0 0 0 13 0 22 78 165 0 0 0 0 0 14 0 3*5 89 172 0 0 0 0 0 15 0 12 214 172 0 0 0 0 .45 16 0 8.6 221 165 0 11 0 0 .50 17 0 71 200 145 0 0 0 C .50 18 0 9.3 62 133 0 5.8 0 0 .50 19 0 22 0 133 0 6.4 0 0 .50 20 0 31 106 127 0 7.5 0 .30 .50

21 2.3 31 214 133 60 7.5 0 0 .50 22 49 71, 214 139 103 0 0 0 .50 23 31 470 193 139 103 2.1 0 0 .50 24 352 2,000 193 97 103 0 0 0 .50 25 7,100 9,450 91 66 103 0 0 0 .14 26 5,070 5,040 66 53 97 0 0 0 0 27 2,430 2.480 71 58 97 C 0 0 0 28 1,160 2,260 ei 58 103 0 0 0 0 29 379 ______97 58 103 0 0 0 0 30 53 139 58 97 0 1.1 0 0 31 ______55 145 91 0 0 TOTAL 0 0 MEAN 0 0 .036 .026 .17 MAX 0 0 1.1 .50 .50 MIN 0 C 0 0 1.1 0 53 0 0 0 0 0 AC-FT 0 0 2.2 1.6 10 (t) 0 0 2,720 2,300 1,670

WTR YR 1969 TOTAL 57,582.89 MEAN 158 MAX 9,450 MIN 0 AC-FT 114,200 t 147,700

t COMBINED DISCHARGE, IN ACRE-FEET, OF CREEK AND DIVERSION.

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

.50 . IB .74

1.1 1.1 .50

.50 .50 .50

17 000 .50 0 6 .12 0 ie 0 C 0 0 0 8 0 0 19 0000 .24 8 0 0 20 0 0 0 ' 0 0 3 0 0

21 ooooo 9 .29 0 22 0 0 1.1 0 0 9 0 0 23 0 0 1.9 0 0 9 0 0 24 0 0 19 0 0 9 0 0 25 0 0 25 0 0 9 0 0

26 0 0 25 0 0 9 0 0 27 0 0 22 0 0 5 0 0 28 0 0 22 0 .87 9 0 0 29 3.2 0 8.1 0 1 0 0 30 0 0 l.l 0 9 0 0 31 2.8 9.5 0 2 o

TOTAL .59 ' 0 MEAN .19 4.83 4.35 3.36 .11 23.7 2.78 .019 0 MAX 3.2 40 25 22 1.2 SB 34 .42 0 MIN 00000 0 0 0 0 AC-FT 12 286 267 206 5.9 ,460 165 1.2 0 (t) 645 0

WTR YR 1970 TOTAL 1,211.17 MEAN 3.3 MAX 58 t COMBINED DISCHARGE, IN ACRE-FEET, OF CREEK AND DIVERSION. LOS ANGELES RIVER BASIN

11097500 LOS ANGELES RIVER AT LOS ANGELES, CALIF. es, 800 ft upstreani from Arroyo Seco . IAINAGE AREA. --5 14 sq mi. RIOD OF RECORD.

IGE. --Water-stag e recor der. Datum of gage is 292.5 8 ft above mean sea level (levels by Los Ange les County Distric t). See WSP 1928 for history of changes prior to Dec. 9, 1939. fERAGE DISCHARGE .--41 y ears, 69.5 cfs (50, 350 acre- ft per year) ; median of yearly mean discharge s, 41 cfs (29,700 acre-f t per y ear). (TREMES.--Maximu minimums (discharge in cubic feet per second, gage height in feet) for the water ye ars able: Maximum Minimum daily r yr Date Dis charge G.H. Date Dis charge 66 Dec. 29, 196S 32 000 10.08 Oc . 3., 1965, July 19, 22-24 , 1966 .10 67 Nov. 7, 1966 32 100 10.10 Oc . 3-9, 11-20, 1966 .40 68 Mar. 8, 1968 30 900 9.84 Oc . 23, 1967 3.4 69 Jan. 25, 1969 41 800 12.30 De . 8, 1968 4.0 70 Mar. 4, 1970 17 000 6.65 Ju y 19, 1970 6.9 Period of record: Maximum di scharge, 67,000 c fs Mar. 2, 1938; no flow at times in some yea

40 by Han Sepulveda floo d-control reservoi r (combi ned capac ity, 49, 400 acre- ft) and by several small flo od-control res- Angeles,, sewage from Los Ange released to channel about 8 mile s upstre am. Many diversi ons above station for domest ic use an d irrigation . eport.

VISIONS (WATER YEARS). --WSP 1635: 1958. WSP 1928: Drainage area.

DISCHARGE, IN CU 1C FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

AY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEf 1 .20 .2(1 24 448 18 5.4 .40 .40 .40 .30 .20 2 .20 .20 IB 293 16 2.B .50 .40 .40 .30 .20 3 .10 .20 34 1BB 16 2.B .40 .40 .40 .30 .20 5 .20 .20 6.7 138 12 17 .40 .40 .40 .30 .20 6 .20 7 .20 .20 10 115 BB .BO .50 .40 .40 .30 .30 B .20 .20 7.7 86 50 1.2 .50 .40 .40 .30 .40 9 .20 .20 515 56 21 .60 .50 111 .60 .20 .20 13 .20 .20 444 15 16 .80 .50 37 .BO .30 .20 11 .20 .20 19 30 16 1.2 .50 8.2 .80 .30 .20 1.9 .BO .80 .40 .40 .20 :! 3 .20 .20 30 16 9.B 1.2 .60 .40 .30 .40 .20 . ( 4 .20 543 277 15 9.B .80 .50 .40 .30 .30 .20 S .20 1, 420 46 13 13 1.9 .50 .40 .30 .30 .30 :: 6 .20 3, 360 16 5.8 14 2.5 .40 .40 .40 .30 .30 7 .20 6, 420 12 2.5 .; '< B .20 B91 B.7 3.8 14 .80 .40 . 0 .40 .20 .20 9 .20 39 3.8 3.4 13 .BO .40 . 0 .50 .10 .20 81 0 .20 10 B.2 6.7 B.2 .80 .40 . 0 .50 .20 .20 14 1 .20 3.B 3.8 6.7 8.7 .80 .40 . 0 .60 .20 .20 .8! 2 .20 B, 450 6.2 6.2 9.B .80 .40 . 0 .60 .10 . 3C 3 .20 3. 930 10 5.8 12 .80 .40 . 0 .40 .10 .30 4 .20 4, 990 10 5.4 15 162 .40 .40 .30 .10 .3C 5 .20 1. 370 3.4 5.0 12 159 .40 .40 .30 .20 .30 : < 6 .20 138 2.2 4.6 10 5.B .40 .40 .30 .20 .30 .< 7 .20 50 1.4 4.2 B .20 30 2.B 3.B 10 :!

31 .20 625 65 .50 .40 .20 .20 JL

EAN .20 1,057 521 115 69.7 12.4 .45 5.41 .42 .25 .24 8.22 162 .80 111 .80 .40 .40 IN .10 .20 1.4 2.5 B.2 .50 .40 .40 .30 .10 .20 j; 15 15 48- LOS ANGELES RIVER BASIN

11097500 LOS ANGELES RIVER AT LOS ANGELES, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 DAY JUN JUL AUG S 1 1.2 .50 7.2 10 23 5.8 645 10 12 .7 6.7 8 2 .50 .50 551 9.2 35 5.8 195 13 9.2 .0 6.7 4 3 .40 .60 2,630 12 18 5.4 19 12 8.2 .0 .7 5 4 .40 .60 41 16 14 6.2 316 16 5.8 .4 .7 1 5 S.4 74 5.8 .8 .2 6 .40 .60 2,640 22 14 5.0 24 16 9.2 .4 7 .40 7,720 308 24 16 6.7 331 '139.2 18 .7 .0 8 .40 171 62 16 23 5.8 32 18 .8 .8 9 .40 25 33 18 18 5.4 18 12 16 .0 .2 13 .50 12 18 21 21 5.0 6.2 62 7.7 * .8 11 .40 8.7 21 21 18 325 1,130 22 8.2 .7 8 12 .40 6.2 16 20 14 1,560 56 8.7 9.2 .2 .4 13 .40 .2 20 16 15 908 20 9.2 9.2 . 8 .2 14 .40 .6 18 14 16 272 18 9.2 8.7 .6 .8 15 .40 .0 18 12 14 38 21 14 8.2. 1 .6 16 .40 .4 15 14 16 19 23 15 10 .8 .2 17 .40 .2 14 16 16 9.2 14 13 9.8 .7 .6 18 .40 .8 14 20 10 7.7 994 14 7.7 .7 .2 19 .40 .5 14 15 9.8 18 288 15 7.2 f 2 .8 20 .40 41 13 15 9.8 6.7 52 8.2 9.8 2 .8 21 .50 90 16 12 14 5.4 485 7.7 14 t7 .8 22 .50 14 414 4,700 13 6.2 551 8.2 9.2 . 7 .6 23 .50 14 16 680 14 7.2 46 7.7 6.7 . 7 .8 24 .50 7.7 11 4,850 14 8.2 398 6.7 7.7 .4 .2 25 .50 4.6 8.7' 330 126 5.4 82 8.7 6.2 .4 .2 26 .50 3.8 7.7 60 19 5.4 62 6.7 7.2 .8 .8 27 .50 3.4 8.7 52 16 6.2 41 12 8.7 f 4 .4 28 .50 5.8 12 41 8.2 10 262 12 16 .8 .1 17 29 .50 19 .0 .2 15 33 .50 8.2 14 74 6.7 35 6.7 7.7 .2 3 31 .50 12 182 775 12 TOTAL MEAN .47 285 291 366 19.9 131 213 12.9 9.84 6.31 4 82 2 MAX 18 14 7 MIN .40 .50 7.2 9.2 8.2 5.0 6.2 6.7 5.8 4.2 .1 586 388 97 1,

40 AC-FT 82,640

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

QCT uc^ FEB 7.2 5.8 74- 13 21 19 553 7.7 7.7 8.2 6.7 5.8 9.8 6.7 42 13 9.2 15 154 7.7 7.2 11 7.7 5.4 7.2 7.2 34 15 8.7 12 15 9.2 8.7 8.7 7.7 6.2 6.2 8.2 27 12 14 11 5.8 6.2 10 9.8 6.2 7.7 4.6 8.7 18 13 9.8 12 5.0 7.7 10 9.2 9.2 7.7 4.6 7.7 21 14 11 44 5.4 8.7 9.8 9.8 6.7 7.7 4.6 12 19 12 12 848 3.8 8.2 8.2 9.2 276 8.2 3.8 8.7 60 14 13 4,780 5. 13 7.7 10 21 6.2 4.2 9.2 18 14 145 64 6. 10 6.2 11 18 7.2 1 6.2 9.8 20 12 89 25 6. 8.7 7.7 10 10 7.2 1 5.4 10 20 152 15 27 7. 8.7 8.2 9.2 5.8 13 1 7.2 11 20 16 16 20 7. 27 14 8.7 5.4 6.7 1 5.4 12 19 7.7 541 315 5. 18 1C 8.2 7.7 6.2 14 5.0 11 19 7.2 58 49 4. 18 9.8 5.4 6.7 5.8 15 4.6 12 27 7.2 20 20 5. 8.7 8.7 5.0 7.7 5.4 16 4.6 13 26 7.2 11 26 6. 11 5.8 6.2 7.2 6.2 7 5.4 12 23 6.2 122 59 5. 10 6.2 6.7 6.2 7.7 a 5.4 11 1,150 6.2 27 14 7. 8.7 7.7 6.2 5.4 8.7 9 5.8 3,360 360 6.7 12 10 6. 8.2 8.2 6.2 6.2 7.7 0 5.4 It 840 53 6.7 9.2 12 5.8 8.2 7.7 7.2 6.2 7.2 1 4.2 7,190 34 6.2 11 2 3.8 2,060 17 10 13 7.2 7.7 7.2 8.7 5.4 7.7 5.8 3 3.4 72 20 9.2 11 5.8 14 7.2 8.7 6.2 6.2 6.7 4 3.8 20 11 5 4.6 19 19 12 8.2 5.8 18 9.2 8.2 6.7 5.0 9.2 6 3.8 17 20 14 15 7 3.8 17 29 574 14 7.7 6.7 14 10 6.7 7.2 9.8 a 5.8 19 20 85 10 7.2 5.0 19 8.7 5.4 7.7 9.8 9 5.4 14 20 16 14 7.7 6.2 13 1C 6.2 7.2 8.7 30 5.8 1,260 18 14 7.7 8.2 8.7 7.2 6.7 8.2 9.8 31 6.7 15 295 5.8 7.2 6.2 7.2 225.8 EAN AX 9.8 14 11 276 13 IN 3.4 5.8 15 C-FT 325 31,880 4,530 2,780 2,510 12,810 1,800 642 505 463 1,010 448 LOS ANGELES RIVER BASIN

11097500 LOS ANGELES RIVER AT LOS ANGELES, CALIF. - -CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY JUN JUL AUG st 1 11 7.4 6.9 6.9 60 2,490 63 31 22 47 22 2 9.8 9.2 7.8 6.7 60 1,350 65 25 27 50 23 3 14 6.0 7.4 9.2 180 1,430 371 22 31 49 24 it 4 7.4 10 8.3 9.2 I 5 6.0 8.7 9.8 8.7 lf 6 5.5 7.4 6.0 9.8 5,650 867 1 6 6.0 7.8 4.0 10 48 28 9 5.5 8.3 9.2 10 883 505 138 27 53 52 24 1if 11 8.3 16 115 13 362 550 123 21 56 68 21 1 12 9.2 8.7 22 11 527 326 104 28 60 68 23 13 6.9 7.8 6.0 337 500 120 119 26 58 67 23 1 14 112 7.8 8.3 1,410 293 248 115 25 53 67 22 15 59 221 34 32 351 286 96 27 53 67 22 :; 16 10 4C 178 17 293 281 228 26 74 67 19 I{ 2' IB 9.2 5.1 18 418 442 120 88 23 62 67 21 19 11 7.4 12 3,500 15C 82 95 22 53 66 22 11 11

21 12 9.8 9.2 7,370 161 1 22 12 9.8 6.4 23 9.2 9.8 8.3 162 6,480 286 100 40 54 58 16 2| 24 9.2 9.8 9.8 4,280 5,380 257 64 64 58 54 14 11 26 15 12 233 11,300 7,680 181 50 67 54 46 17 27 14 7.8 38 16 \\ 28 15 7.4 58 49 33 16 29 6.7 6.9 7.4 1.140 61 3? 40 46 28 16 30 134 6.9 .7.4 80 linn 52 34 27 47 24 15 it I?:! MAX 68 28 2< MIN 5.5 5.1 4.0 6.9 60 52 34 21 22 22 14 i;

CAY OCT NDV DEC JAN FEB MAR APR MAY JUN JUL AUG SE 1 17 16 16 25 12 2,270 12 16 13 23 16 10 2 19 14 22 28 16 1,090 13 15 16 13 14 8. 3 24 14 12 26 14 89 13 11 19 12 16 12 4 14 14 12 24 31 1,900 17 15 16 9.2 19 13 9>a

6 13 1,770 12 11 33 58 14 18 12 1C 22 f- 7 16 845 12 10 33 30 12 16 12 9.8 22 11 8 17 49 14 12 34 20 12 15 14 9.6 23 14 9 8 56 28 18 9.2 20 12 10 6 53 18 9.8 15 10 21 15 11 5 35 14 162 398 27 12 9.8 16 9.2 20 16 12 2 32 13 121 5 27 10 12 14 8.3 24 14 13 6 33 13 27 3 28 12 11 50 1C 17 9. 14 17 15 10 41 6 25 17 9.6 28 9.8 18 8. 15 25 12 12 104 3 14 17 9.2 20 9.2 14 12 16 17 12 14 1,250 3 14 16 14 16 9.8 12 17 15 12 12 111 6 13 17 13 1$ 8.7 16 18 14 12 14 24 4 13 22 15 17 7.8 19 i: 19 13 11 14 15 5 11 18 16 14 6.9 25 9- 20 14 11 13 14 3 12 17 18 13 9.8 25 8. 8.3 8.7 9.2 in

13 13 - 7.8

MEAN MAX MIN LOS ANGELES RIVER BASIN

11098000 ARROYO SECO NEAR PASADENA, CALIF. ight

DRAINAGE AREA.--16.0 sq mi. PERIOD OF RECORD.--December 1910 to September 1970.

ige recor ean

VERAGE D SCHARGE.--56 years (1913-15 1916-70) , 9.62 cfs (6,970 acre-ft per year) ; median of year ly mean d charges , 5.0 cfs (3,600 acre-ft pel year). XTREMES.

Annu »1 maximum discharge (* ) and pea k discharges above has e (150 cfs), water years 1966 -70 a e rime Di sen. G.H. Date Time Disch. G.H. Date Time Disch. G.H. 0 . 17, 965 L930 1 ,020 4.60 Mar. 13, 1967 0730 475 3.45 Jan. 21, 1969 0600 1,980 5.25 0 . 22, 965 2000 *3 ,160 6.33 Apr. 18, 1967 1600 151 2.63 Jan. 25, 1969 1100 *8,540 9.37 e . 29, 965 L600 3 ,050 6.06 Apr. 22, 1967 0200 234 2.93 Feb. 6, 1969 0530 946 4.17 Feb. 25, 1969 0400 4,560 7.30 e . 3, 966 )630 638 3.73 Nov. 19 1967 0430 *1,720 4.99 e . 6, 966 *668 3.78 an. 22, 967 L245 234 2.88 Mar. 8, 1968 0530 192 2.74 Mar. 4, 1970 2300 189 2.73 an. 24, 967 L815 994 4.23 Annual minimum daily discharge, water years 1966-70

tr yr D ite Discharge Wtr yr Date Dis charge 966 0 .t. 25 29, 1965 .50 1969 Jan. 3-6, 1969 .62 967 N v. 19 1966 1.5 1970 Sept. 28, 1970 .73 968 S« pt.25 27, 1968 1.1 datum) , o basis c f p rea measurement of peak flow , no low a £ MARKS. - schema ic diagram of San Gabriel and Los Angeles River basins elsewhere in t his report. OOPERATIC

EVISIONS (WATER YEARS) . --WSP 1315-B: 1914 (M), 1918(M), 1920 21 (M). WSP 1928: Drainage area.

AY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 .80 .60 64 98 20 3 8.7 5.4 4.2 3.2 1.9 2.1 2 .70 .60 55 92 19 3 7.9 5.4 4.0 3.4 1.7 2.1 3 .70 .60 51 74 18 3 7.9 5.4 3.7 3.4 1.7 Z.I 4 .70 .60 44 72 17 3 7.9 5.4 3.7 3.4 1.7 1.9 5 .70 .60 36 64 16 2 7.4 5.4 3.7 3.4 1.7 1.7 6 .70 .60 30 55 50 2 7.4 5.4 3.7 3.4 1.7 Z.I 7 .70 .60 27 50 32 2 7.4 5.4 3.7 3.7 1.7 2.3 B .70 7.1 6.0 3.7 3.7 1.7 1.9 9 .70 .60 28 40 24 2 7.1 6.B 3.7 3.7 1.7 1.7 10 .70 .60 30 36 22 2 7.1 6.8 3.4 3.7 1.7 1.7 1 .70 .60 24 35 20 1 6.8 6.3 3.Z 3.7 1.7 1.7 z .70 .60 28 32 20 1 7.1 6.0 2.7 3.0 1.7 1.7 3 .70 .60 25 30 19 1 6.8 5.7 2.5 Z.7 1.7 1.9 4 .70 1.2 26 30 18 1 1.7 1.7 5 .70 5.0 21 28 18 1 6.3 5.4 2.7 2.3 1.7 1.7 6 .70 29 22 Z7 17 1 3.2 Z.I 1.7 1.3 7 .70 359 20 26 16 1 8 .80 175 19 25 16 0 5.4 5.2 3.2 1.9 1.5 1.9 9 .80 42 18 25 15 0 5.Z 5.0 3.0 1.9 1.5 3.4 0 .80 26 18 24 15 1 .70 18 17 23 15 9.9 5.2 5.2 3.2 1.9 1.7 3.0 2 .70 742 18 22 14 3 .70 280 17 22 14 9.6 5.0 5.4 3.4 1.7 1.9 Z.I 4 .70 373 17 21 14 2 5.1 5.4 3.4 1.7 1.9 1.9 5 .50 288 16 20 14- 5 5.7 5.0 3.4 1.7 1.9 1.7

6 .50 192 16 20 14 2 6.0 5.0 3.4 1.9 1.9 1.7 7 .50 134 15 19 14 1 6.3 5.0 3.4 1.9 1.9 1.9 8 .50 99 14 18 13 1 6.4 5.0 3.4 Z.I 1.9 1.9 9 .50 80 701 18 0 0 .60 70 165 1 .60 118 20 9.0 4.6 Z.I 2.1

AN .67 X .80 742 701 98 50 15 8.7 6.8 4.Z 3.7 2.1 3.7 N .50 .60 14 18 13 9.0 5.0 4.6 2.5 1.7 1.5 1.3 120 LOS ANGELES RIVER BASIN

11098000 ARROVO SECO NEAR PASADENA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 2.1 2.3 11 34 11 38 56 0 13 . 2 2.1 11 11 30 10 41 52 7 12 5 . 3 2.1 288 11 26 11 34 52 7 12 6. 4 2.1 42 11 27 11 34 49 7 11 5- 5 2.1 145 11 25 11 32 47 7 11 6 2.1 618 11 24 10 26 44 7 10 5.C 7 54 212 10 24 10 34 40 7 10 4. 8 16 114 9.3 23 10 26 38 8 9. 4.' 9 6.0 66 9.3 22 10 27 '38 8 9. k, . 1C 4.2 55 9.0 21 10 26 37 8 9. f-- 11 3.2 45 8.7 21 21 67 36 8 8. !* 12 3.2 39 8.5 20 112 43 34 9 6. > 4. 13 2.7 33 8.5 20 269 39 32 6 9. 4*. 14 2.1 26 B.2 19 142 36 30 7 9. !* 15 1.9 22 8.2 16 75 38 29 6 9. 16 2.1 20 6.5 16 64 34 28 16 8. 4. 17 1.9 19 8.2 16 59 34 27 16 6. i k.; 18 1.9 18 8.2 15 52 71 27 L6 6. 19 1.5 17 7.9 15 46 75 26 5 8. ^. 20 2.3 15 7.9 14 44 60 24 15 8. 4. 21 3.2 15 8.2 14 40 76 24 14 8. 4. 22 2.7 14 70 14 38 116 23 14 7. 4. 23 2.5 14 46 14 35 76 22 14 7. 4, 24 2.5 13 233 14 34 74 22 3 8. 4. 25 2.5 13 119 15 32 59 22 13 6. 4. 26 2.7 13 56 13 31 64 22 13 7. 4. 27 2.7 12 45 12 30 66 22 3 7. 4. 28 3.0 12 40 11 30 66 22 13 7. 4. 3.0 11 0 26 63 21 13 7. 4. 30 2.5 11 6 26 57 20 13 7. 4. 31 U 6 35 24 "1"

MAX MIN 1.5 2.3 7.9 11 10 26 20 3 7. AC-FT i V.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 MAR APR MAY JUN JUL 1 3. 18 7.1 7.1 6. 14 .1 .0 .3 1.9 1.7 2 3. 14 7.1 6.6 6. 12 .7 .7 .1 1.7 1.7 3 3. 12 7.1 6.3 6. 8.7 .0 .7 .1 1.7 1.9 4 3. 12 6.8 6.3 6. 8.2 .7 .7 .9 1.7 1.9 5 3. 11 6.3 6.8 5. 7.9 .3 .0 .9 1.5 1.9 6 3. 7 3. 11 6.3 6.3 10 7.5 .8 .0 .1 1.9 1.5 8 3. 10 6.8 6.3 74 7.6 .0 .3 1.5 1.3 9 3. 9.3 6.3 12 19 6.3 .6 .0 .1 1.5 1.3 10 S- 9.3 7.1 10 14 6.2 3 .7 .9 1.3 1.3 11 3. 8.7 8.2 8.2 13 6.0 .6 .2 .7 1.3 1.3 12 3. 8.7 6.0 7.9 12 6.3 .1 .2 .5 1.3 1.3 3 3. 7.9 6.8 17 14 6.3 .1 .0 .7 1.5 1.3 4 3. 7.6 6.3 23 12 6.0 .0 ,7 .9 1.7 1.5 5 3. 7.9 6.3 13 11 6.0 .2 .5 .1 1.7 1.7 6 3. 7.9 6.6 11 11 6.3 .7 4 5 .9 1.9 1.9 7 3. 7.9 7.5 11 11 6.3 .4 f 3 .7 2.1 1.7 8 3. 18 6.3 9.0 11 6.0 4 ,3 .5 1.9 1.5 9 290 14 6.6 10 10 5.7 .0 .3 .7 1.7 1.9 0 68 10 6.8 10 10 5.7 .0 .3 .7 1.9 1.9 1 2 .7 1.7 1.7 3 4 1.3 5 18 9.6 6.6 8.5 8.7 5.2 4.2 2.5 .7 1.3 1.1 6 17 10 7.4 8.? 8.7 5.4 .0 2.5 .9 1.3 l.l 7 16 9.6 16 7.6 8.2 5.7 .7 2.3 .9 1.3 1.1 8 9 13 8.5 8.0 6.8 7.6 5.0 .7 2.5 .9 1.3 1.7 0 25 7.9 7.1 7.9 5.0 .0 2.5 .9 1.3 1.7

AN 3.56 23.2 10.2 7.27 9.37 11.8 6.66 5.19 2.96 1.87 1.58 1.56 X 4.2 290 18 16 23 74 14 7.1 4.0 2.3 2.1 1.9 1.1 LOS ANGELES RIVER BASIN

11098000 ARROYO SECO NEAR PASADENA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY JUN JUL AUG SEP

1 1.9 2.7 1.7 .85 12 8.2 5.0 2 1.7 2.5 14 11 7.9 ».7 3 1.7 2.1 1.7 .62 135 253 60 19 13 11 7.6 "i.7 4 1.7 2.3 1.7 .62 124 227 42 19 13 11 7.4 4.7 5 1.7 2.3 1.7 .62 212 202 57 20 13 11 7.1 4.4

7 1.7 1.9 1.7 .73 173 55 45 IB 13 16 7.1 4.4

9 1.7 1.7 1.7 .73 124 31 40 17 13 13 6.8 4.4 10 1.7 1.7 1.7 .85 114 29 38 16 13 12 6.B 4.4 11 1.7 1.7 2.1 .85 11B 114 39 16 14 11 6.6 4.4 12 1.7 1.7 1.9 1.3 137 110 36 15 14 12 6.6 4.2 13 1.7 1.9 1.9 1.9 131 106 35 15 14 11 6.3 4.4 14 1.9 1.9 1.7 14 126 99 32 15 13 11 6.3 i.7 15 1.7 4.0 1.7 3.7 133 94 29 15 13 10 6.3 ».7 16 1.5 3.0 2.7 2.5 120 90 28 14 14 10 6.0 5.0 17 1.3 2.5 2.5 1.9 111 86 28 15 14 1C 6.C 5.4 19 .5 2.1 1.9 22 116 78 27 15 13 9.9 5.7 5.4 20 .5 1.9 1.7 128 109 73 26 15 13 9.3 5.4 5.2 21 .5 2.1 1.7 569 108 92 24 15 13 9.6 5.2 5.0 22 .5 2.1 1.7 223 116 86 24 15 13 9.6 5.C5.~: 5.0 23 .5 2.1 1.5 75 290 74 24 15 13 9.0 5.2 24 .5 2.1 1.5 169 631 63 23 15 14 9.0 5.0 5.0 25 .3 1.9 4.3 3-,21 r 1,800 58 23 15 13 9.0 5.2 5.0 26 1.3 1.7 4.4 2,120 498 56 22 15 12 9.3 5.2 5.0 27 1.1 1.7 1.9 356 347 53 21 15 14 9.3 5.2 ».7 28 1.3 1.7 1.5 254 336 51 21 16 15 9.0 5.2 ».7

30 2.7 1.7 1.1 207 46 20 14 13 8.5 5.4 ».2

MEAN 1.65 2.10 1.91 251 249 116 33.2 16.2 13.4 10.7 6.18 4 5:* MAX 2.7 4.0 4.4 3,210 1,800 299 60 20 15 16 8.2 MIN 1.1 1.7 1.0 .62 108 44 20 14 12 6.2 5.0 ».2

1 4.2 5.0 4.4 5.2 4.4 143 5.7 3.4 2.3 1.9 .f 1 1 2 4.2 4.7 4.4 5.2 4.4 104 5.4 3.2 2.1 1.9 .1 1 1 3 4.7 4.7 4.4 5.2 4. 35 5.4 3.2 2.1 1.9 .1 1 1 5 4.4 4.7 4.4 5.2 4. 59 5.2 3.2 2.1 1.9 .1 89 6 4.7 15 4.4 5.2 4. 30 5.2 3.2 2.3 1.9 1.1 85 7 5.0 22 4.7 5.2 4. 21 5.2 3.4 2.5 1.9 1.1 85 9 5.0 5.2 5.2 5.4 5.6 14 5.2 3.4 2.5 1.9 .1 8 10 5.0 5.0 5.2 7.7 69 12 5.2 3.4 2.5 1.9 .1 8

11 5.0 4.7 5.2 5.4 38 11 5.2 3.4 2.5 1.9 .1 8 12 5.0 4.7 5.2 5.2 13 9.9 5.0 3.4 2.5 1.9 .1 13 15 1.5 .1 16 5.4 5.0 5.0 7.7 6.6 8.2 5.0 2.5 2.5 1.5 1.1 17 1.5 1.1 18 l.l 19 1.3 1.1 20 1.3 l.l 21 1.1 1.1 22 1.1 1.3 2* 25 1.3 1.3 8 26 2.1 1.3 1.3 98 27 1.9 1.3 1.1 85 26 1.3 1.1 73 29 5.4 85 30 1.9 1.1 1.1 B5 31 5.2 5.2 4.4 6.8 2.5 1.1 1.1 -

MEAN 5.26 5.74 5.06 5.17 13.1 20.5 4.83 2.96 2.30 1.55 1.13 1. 01 MAX .1 MIN 1.9 1.1 1.1 73 AC-FT 325 342 311 318 729 1,260 2B7 1B2 137 95 70 60 LOS ANGELES RIVER BASIN

11098500 LOS ANGELES RIVER NEAR DOWNEY, CALIF.

DRAINAGE AREA.--599 s PERIOD OF RECORD.--Ma GAGE.--Wate

AVERAGE DISCHARGE.--42 ye rs, 108 cfs (78,250 acre-ft per year); median of yearly mean discharge (48,500 acre-ft per ye r). ms (discharge in cub c feet per second, gage height in feet) for the water years

Ma . Minimum daily Wtr yr Date Discharge G H. Date Discha 1966 Dec. 29, 1965 37,100 7.17 Nov. 11, 1965 t.3 1967 Nov. 7, 1966 37,000 7 16 Oct. 2, 1966 fe' U 1968 Mar. 8, 1968 37,400 7.20 Oct. 7-9, 14-17, 1967 1 1969 Jan. 25, 1969 58,000 2 1970 Feb. 28, 1970 20,900 5.50 Sept. 6, 1970 1 a Nov. 30, Dec. 22, 23, 1968, Jan. 1, 2, 4, 1969. Period of record: Maximurn discharge, 79,700 cfs Mar. 2, 1938, on basis of slope-area measurements; no f low at times in some years. a City of Los Angeles stores imported Owens River water in San Fernando and Chatsworth Reservoirs and at time a- m of San Gabriel and COOPERATION. --Records furnishe ity Flood Control District and reviewed by Geological Survey . REVISIONS.--WSP 1928: Drainage area.

DISCHARGE! IN CUBIC FEET PER SECOND,.WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FE8 MAR APR HAY JUN JUL

1 6. 8.4 101 70 D 113 20 7. 7. 7.9 12 .4 10 2 ">. 7.9 81 3 267 18 6. 8. 7.9 8.9 .4 il 1 5. 7.4 24 3 57 12 7. 8. 8.4 11 .9 7.9 * 7. 7.4 122 4 27 13 7. 8. 6.5 6.0 7.4 5 7. 7.4 17 2 23 20 7. 8. 7.0 10 7.4 6 6. 6.0 12 2 2,040 8.4 8. 8. 8.4 8. 9.4 7 7. 6.0 ' 9.4 1 123 8.9 B. 8. 8.9 7. 0 B 7. 8.4 7.9 1 Ill 10 8. 8. 8.9 8. 10 9 7. 1C 763 1 40 9.4 7. 80 1C 8. 8.4 10 B. 6.5 728 37 10 7. 82 12 6. 7.9 11 12 4.3 51 34 12 8. 30 9.4 B. I 7 '* 12 7. 5.0 325 34 12 8. 14 8.9 B. JO 13 9. 6.0 100 29 12 10 6. 10 9. 7.9 1* 7. 32 274 25 15 8. 6. 12 11 7.9 15 7. 1, 4C 66 35 15 8. 6. 11 12 8.9 16 7. 4, 60 31 35 12 7. 7. 10 8.9 10 17 7. B. 70 27 40 11 7. 7. 8.9 10 IB. 9 IB B. 1, 00 25 35 9.4 B. 7. 7.9 13 i2 19 8. 60 IB 32 9.4 8. 9. 7.0 14 147 20 7. 2C 18 29 9.4 8. 8. 8.4 15 r 21 B. 48 19 16 10 8. 7. 9.4 12 8.9 22 7. lit GO 35 20 9.4 8. 7. 10 13 7.0 23 7. 5, 70 26 19 8.9 8. 7. 10 12 8.4 2* 7. 6t 00 24 30 140 7. B. 11 14 6.5 25 B. 2, 00 15 20 308 7. 9. 8.4 15 7.0 26 B. 79 13 20 20 7. 10 7.4 14 7.0 27 B. OB 13 20 14 8. 8. 12 12 8.4 2B B. 77 13 22 15 9. 7. 12 11 IB. 4 29 8. 88 15,700 17 9. 6. 11 12 ^1 30 8. 0 16 8. 6. 11 8.9 1 3 ^8 31 7. 685 19 9 u 3 5.7 554.0 MEAN 7.9 1,432 676 18 6 119 26.5 B.2 13. 9.39 10.7 1 1.8 16.5 12 15 14 147 MIN 5. 4.3 7.9 1 1 16 8.4 6. 6. 6.5 6.0 8.9 6.5 559 656 725 1,100 LOS ANGELES RIVER BASIN

11098500 LOS ANGELES RIVER NEAR DOWNEY, CALIF.--CONTINUED DISCHARGE , IN CUBIC FEET PER SECOND , WATER YEAR OCTO iER 1966 TO SEPTEM ER 1967 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL A JG SEP

1 8.<> 8.4 18 24 0 3 157 2 6.0 6.5 7 !3 48 3 7.9 6.5 4,190 22 35 20 42 26 25 8 >3 88 4 8.4 8.4 131 28 28 42 213 32 21 8 3 29 5 9.4 6.5 2,850 28 24 14 140 28 21 9 >1 29

7 10 10,000 835 32 31 17 325 27 31 19 '1 21 8 11 302 100 26 36 17 72 31 32 20 >2 19 10 30 28 51 29 35 16 19 77 20 21 >1 17

12 7.9 18 47 34 28 1,450 111 25 25 25 9 19

14 8.4 14 31 23 32 462 32 20 22 21 0 17 15 7.4 16 30 24 28 196 30 28 24 28 0 20 16 7.9 15 29 24 31 114 36 31 27 23 0 16 17 9.4 16 28 28 30 82 28 29 27 21 9 16 18 12 13 27 31 24 56 988 28 25 20 8 18 19 6.5 11 20 7 18 20 7.0 325 20 8 16 21 7.4 296 31 21 28 23 592 22 36 V 8 17 22 7.0 60 360 6,590 25 22 6T2 25 29 0 19 23 6.5 36 35 753 27 22 115 26 25 21 0 18 24 8.4 30 24 5,350 28 24 229 22 26 24 0 17

27 6.5 17 21 182 26 18 60 27 27 22 8 20 28 7.4 17 21 53 26 22 164 26 34 22 0 199

910 788 656 6i 9 1,187 MAX 28 3 199 MIN 6.0 6.5 18 20 23 14 19 20 19 17 7 16

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL All G SEP

2 18 18 66 26 37 35 33243 ' 21 26 25 2 1 16 3 14 18 51 30 31 30 23 30 25 2 0 18 A 14 18 31 23 1 9 18 14 18

6 14 18 35 29 28 77 22 24 28 23 2 4 18 8 13 18 95 28 31 6,720 19 31 27 23 4 3 15 9 13 17 29 28 179 178 22 26 24 23 3 0 17

11 14 15 36 155 29 23 23 25 30 20 2 2 22 12 15 16 22 1 8 17 13 15 18 22 2 4 15 14 13 19 35 18 130 90 18 36 23 18 2 3 17 15 13 20 40 18 32 23 20 25 24 19 2 7 14 16 13 22 39 20 21 34 22 29 18 23 2 5 16 17 13 22 35 19 120 111 20 29 18 23 2 2 18 18 14 19 1,810 17 63 31 21 24 21 22 2 1 19 19 15 4,000 449 18 28 29 19 21 22 21 2 0 19

21 15 9,410 50 16 28 26 18 22 23 20 2 4 8 22 14 2,570 34 21 28 28 23 20 24 20 3 5 6 23 14 125 40 21 28 24 34 19 22 23 3 1 6 2<> 22 79 40 23 20 20 24 20 23 23 2 9 7 25 22 39 38 27 19 19 31 20 22 22 2 4 9 26 17 34 40 38 35 24 22 21 23 22 2 3 19 28 18 45 41 181 27 22 14 36 26 28 2 1 19 29 16 35 40 34 28 21 16 28 27 18 2 0 15 30 16 1,520 35 28 23 20 24 20 19 2 2 17

MEAN 15.4 674 119 62.7 59.7 297 51.7 25.5 25.2 21.7 30. 3 17.5

MIN 13 15 29 16 19 19 14 19 18 IB 1 8 14 LOS ANGELES RIVER BASIN

11098500 LOS ANGELES RIVER NEAR DOWNEY, CALIF.--CONTINUED DISCHARGE, IN CUBIC

DAY OCT NOV DEC JAN FE8 MAR APR MAr JUN JUL AUG Sf

1 2 19 18 14 12 248 1,720 91 48 50 68 45 1 4 21 19 16 12 228 630 79 74 71 70 34 > 16 19 17 13 1,460 645 577 80 75 67 37 ! 6 4 16 17 14 6,830 894 317 51 75 69 50 \ 7 5 17 15 17 1,640 1,020 86 48 74 72 36 8 7 17 14 17 1,180 685 88 48 53 70 40 9 4 15 19 17 888 630 101 50 61 90 36 10 5 14 34 18 810 936 88 48 70 105 37 11 16 16 160 3 12 15 18 32 IT 400 451 131 1* 95 17 16 1, 15 83 3 16 18 83 17 18 24 42 18 16 19 20 403 676 233 114 50 68 105 43 20 15 2C 23 6, 880 277 132 119 50 63 85 42 2 21 16 19 116 48 70 88 42 22 19 18 31 23 18 18 12 31 24 18 17 84 61 69 28 25 17 14 437 31, 800 23, TOO 248 60 64 60 60 31 >

27 23 14 54 5, 170 3,870 86 58 69 59 37 30 28 1 30 189 14 15 31 3

MEAN 129 57.3 64.7 82.0 36.3 31. MIN 13 12 12 2 1,87

HTR YR 1969 TOTAL 197,580 MEAN 541 MAX 31,800

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

NOV DEC JAN FE8 MAR APR MAY JUN JUL

28 25 31 23 3,030 23 27 22 33

37 22 82 24

27 25 23 28 29 26 31 35 28 28 26 22 11 29 29 24 27 24 22 28 27 22 35 20 It 11

17.' MEAN 28.7 151 27.8 92.7 341 314 28.0 25.3 27.7 27.0 24.2

MIN 20 20 20 21 19 22 21 19 18 16 16 i:

397,500 LOS ANGELES RIVER BASIN

11100000 SANTA ANITA CREEK NEAR SIERRA MADRE, CALIF. LOCATION.--L«t 34°11'30", long 118°00'59", in SWjNE'sNE'n s< c.10, T.I N., R.ll W., Los Angeles County, on right bank at head of Hermits Falls, 0.9 mile upstream from 1 ig Santa Anita Dam and 3 miles northeast of Sierra Madre. DRAINAGE AREA.--9.71 sq mi. PERIOD OF RECORD.--July 1916 to September 1970 (disco

Prior to Mar. 2, 1938, at datum 0.4 ft low (destroyed by flood]. Mar. 18 to Sept. 27, 1938, at datum 0.7 ft higher. AVERAGE DISCHARGE.--54 years, 6.7 (4,860 acre-ft per year); median of yearly mean discharges, 3.6 cfs (2,600 acre-ft per year). EXTREMES. Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge {*) and peak discharges above base (40 cfs), water years 1966-70

Date Time Di sch. G.H. Date Time Dlsch. G.H. Date Time Disch. G. Nov. ]7, 1965 2115 688 5.25 Dec. 6, 1966 1715 *1,360 7.66 Jan. 21, 1969 0530 1,240 7. Nov. 22, 1965 1700 1 ,320 7.53 Jan. 24, 1967 1830 675 5.20 Jan. 25, 1969 0945 *8,500 a!8. Dec. 29, 1965 1430 *1 ,770 9.15 Mar. 13, 1967 0745 206 3.01 Feb. 6, 1969 Feb. 6, 1966 0915 77 2.01 Apr. 23, 1967 - - - Feb. 25, 1969 - 5,000 a!5. Nov. 7, 1966 1700 96 2.20 Nov. 19, 1967 1245 *396 3.98 Feb. 10, 1970 - 50 Dec. 3, 1966 0630 750 S.50 Mar. 8, 1968 0415 164 2.73 Feb. 28, 1970 1530 *314 3. a From floodmark. Annual minimum daily discharge, water years 1966-70

Wtr yr Date Discharge Wtr yr Date Dischar 1966 Oct. 29, 1965 .50 1969 Oct. 23-28, 1968 1. 1967 Nov. 5, 1966 1.8 1970 Sept. 28, 1970 1968 Sept. 26, 1968 .96 Period of record: Maximum discharge, 8,500 cfs Jan. 25, 1969 (gage height, 18.44 ft, from floodmark), fr above 450 cfs on basis of slope-area measurement of peak flow; practically no flow Aug. 18 to Sept. 14, 1929. 'REMARKS. --Records good e

REVISIONS (WATER YEARS) . --WSP 1315-B: 1917-18(M), 1926 CM). WSP 1928: Drainage ar SSL.

OISCHA RGE, IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1965 TO S EPTEMBER 1966

DAY OCT NOV JUN JUL AUG S 1 .70 .60 66 104 20 2 .60 .70 65 85 9 6.9 8.8 5.9 J.I 4.6 2.7 3 .60 .70 53 75 8 4 .60 .60 30' 66 7 5 .70 .60 27 59 7 6 .70 .70 25 54 6 .8 8.4 5.8 .0 3.9 2.5 7 .70 .70 23 49 0 .7 6.3 5.8 .9 3.9 2.4 8 .70 .70 22 46 3 .9 6.3 6.5 .2 3.9 2.5 9 .70 .80 23 43 0 .0 6.5 8.2 .4 3.B 2.3 10 .70 .BO 24 40 9 .2 6.5 7.4 .4 3.8 2.3 11 .70 .80 20 38 7 .1 8.3 6.9 .1 3.4 2.3 12 .70 .80 24 36 6 .2 8.3 6.6 .0 3.3 2.3 13 .70 .80 21 35 5 .3 8.0 6.3 .7 3.4 2.3 14 .70 1.6 20 33 4 .4 7.5 6.3 .8 3.5 2.2 15 .70 5.4 19 31 4 .4 7.1 6.0 .8 3.3 2.1 16 .70 21 17 30 3 .6 7.1 5.9 .0 3.3 ?.l 17 .70 333 16 29 2 .6 7.4 5.8 .9 3.2 2.1 18 .60 148 15 28 2 19 .60 55 15 27 1 .8 7.6 5.5 .8 3.0 2.2 20 .60 33 14 25 0 .8 7.2 5.5 .8 3.2 2.2

21 .60 23 13 24 9.4 8.0 7.1 5.5 .7 3.1 2.2 22 .60 474 13 23 8.8 8.2 7.1 5.5 .8 3.0 2.1 23 .60 462 13 22 8.5 8.2 6.7 5.5 .8 3.0 2.1 24 .60 379 25 .60 236 13 21 7.6 10 6.6 5.6 5.0 2.8 1.9 2 26 .60 137 12 21 7.4 9.2 6.6 5.8 4.9 2.8 1.9 2 27 .60 94 12 21 7.1 28 .60 80 29 .50 76 608 21 30 .60 69 269 25

10 9.0 8.2 5.4 4.7 2.7 2 MIN .50 .60 12 21 6.6 6.7 6.5 5.2 4.6 2.8 1.9 1

HTR YR 1966 TOTAL 6.961 .20 MEAN 19.1 MAX 608 MIN .50 AC-FT 13.810 LOS ANGELES RIVER BASIN

11100000 SANTA ANITA CREEK NEAR SIERRA MADRE, CALIF.--CONTINUED

OISCHARGf, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

DAY JUN JUL AUG S

1 2.0 1.9 2.6 12 9 15 31 45 21 11 2 2.0 1.9 4.T 12 3 17 35 43 19 1C 3 3 2.0 1.9 255 11 5 17 30 43 19 10 6 4 2.0 1.9 41 11 4 17 27 41 18 10 6 5 2.0 1.8 153 10 3 16 25 40 18 1C 5 6 2.0 1.9 6B1 10 3 15 24 38 IB 13 5 7 2.0 40 250 9.8 2 12 25 36 IT 10 5 8 2.0 13 100 9.6 1 11 23 35 17 9.6 5 9 2.0 6.1 64 9.4 0 11 22 35 17 9.3 5 10 2.0 5.C 47 9.2 ; 11 21 35 17 9.1 5 11 2.0 4.3 40 9.0 9 14 50 34 17 8.9 4 12 2.1 3.9 35 8.8 9 67 40 33 IB 8.8 * 13 2.1 3.B 30 8.6 8 135 35 31 17 8.8 5 14 2.1 3.6 2T 8.5 9 81 31 30 16 8.8 5 15 2.3 3.4 24 8.4 8 54 28 29 15 8.7 4 16 2.1 3.3 22 8.3 8 43 27 28 15 8.6 4 IT 2.1 3.3 20 8.2 8 39 27 27 15 8.7 4 18 2.1 3.2 18 8.2 8 36 50 27 14 8.4 4 19 2.0 3.0 17 8.3 7 32 50 26 14 8.2 5 20 2.0 3.1 IT 8.0 7 30 45 25 13 8.0 4 21 2.3 3.4 16 7.7 6 28 54 24 13 .9 4 22 2.0 3.1 IT 58 6 26 TO 23 13 .8 4 23 2.1 3.0 19 50 6 24 130 23 13 .6 4 24 2.0 2.9 20 181 6 23 70 23 12 .5 4 25 2.0 2.9 22 123 7 22 60 23 12 .5 4 26 2.0 2.8 20 68 7 21 58 22 12 .3 4 27 2.0 2.7 18 52 6 19 52 22 11 .? 4 28 2.0 2.6 17 43 6 23 50 22 11 .2 4 29 2.0 2.6 15 39 25 48 22 11 >4 ( 4 30 2.0 2.6 14 35 23 46 21 11 .4 4 31 1.9 13 33 29 26 .4 148 MEAN 2.C3 4.63 65.8 28.3 19.5 30.2 42.8 30.1 15.1 8.62 6 4. MAX 2.3 40 681 181 29 135 130 45 21 11 6 MIN 1.9 1.8 2.6 7.7 16 11 21 21 It 7.2 4

1.8 AC-FT 15 ,640 NOTE. NO GAGE-HEIGHT RECORD MAR. 31 TO MAY2.

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

NOV DEC JAN FEB .MAR APR MAY JUN JUL AUG

3.0 11 4.0 4.0 4.2 6.8 2.8 2.8 2.2 1.4

1.3 1.2 1.3

1.9 1.6 3.6 3.1 6.7 2.9 3.6 4.0 3.2 1.9 1.4 3.6 3.0 6.4 2.8 4.6 4.0 3.2 1.8 1.3 3.5 3.0 6.0 3.2 4.2 4.0 3.3 1.7

1.2 1.6 1.4 1.5 1.7. 1.6

1.7 1.8 2.8 5.1 2.4 2.3 1.9

3.6 1.6 1.4 3.2 1.3

i.q

31 4.0 4.9

TOTAL MEAN 4.10 2.91 2.55 1.65 MAX 6.9 6.4 7.1 3.6 3.3 2.2 MIN

CAL YR 1967 TOTAL 6,216.30 MEAN 17.0 MAX IBl MIN 2.6 AC-FT 12,330 AC-FT 2,900 LOS ANGELES RIVER BASIN

11100000 SANTA ANITA CREEK NEAR SIERRA MADRE, CALIF.--CONTINUED

DAY JUN JUL AUG SEP

1 1.5 1.6 1.5 1.9 90 210 33 20 12 7.7 6.4 4.3 2 1.5 1.6 1.5 l.B B3 190 32 19 12 7.5 6.7 4.3 3 l.B 1.5 1.5 1.8 75 170 31 19 12 7.5 6.5 4.3 4 1.8 1.6 1.5 1.8 7.6 6.4 4.2 5 1.5 1.6 1.4 1.8 65 140 29 19 12 7.9 6.3 4.2

6 1.4 1.6 1.4 1.6 160 130 28 19 11 8. 6.C 4.2 7 1.5 1.5 1.4 1.6 130 115 27 18 11 B. 5.6 4.1 8 1.4 1.4 1.3 1.7 110 1C8 27 18 12 7. 5.6 4.1 9 1.4 1.3 1.4 1.8 100 100 26 17 11 7. 5.6 3.9 10 1.4 1.5 1.4 1.8 92 92 26 17 11 7. 5.6 3.8

11 1.4 1.5 1.8 1.7 86 87 25 17 12 7.6 5.6 3.7 12 1.4 1.8 1.6 1.8 82 81 25 16 11 7.8 5.6 3.7 13 1.4 3.3 1.6 2.0 80 77 24 16 11 7.4 5.3 3.7 14 1.7 2.2 1.5 13 77 73 24 16 11 7.6 5.1 3.8 15 1.5 1.9 1.6 4.4 74 67 24 16 11 7.4 5.1 4.0 16 1.4 l.B 2.2 2.9 72 63 22 15 11 7.3 5.1 4.1 17 1.3 1.7 1.9 2.4 70 60 22 15 11 7.3 5.1 4.1 18 1.2 1.6 i.a 2.9 70 57 22 15 10 7.1 5.1 4.0 19 1.2 1.5 1.8 19 70 53 22 IS 9.9 7.0 5.1 3.9 20 1.2 1.5 1.8 133 70 50 21 15 9.8 7.0 5.1 3.9 21 1.2 1.5 i.a 500 70- 60 21 5 9.8 7.1 4.9 4.0 22 1.2 1.5 1.8 449 70 53 21 4 9.5 7.0 4.8 4.0 23 l.l 1.5 1.7 100 90 50 21 3.9 24 l.l 1.5 1.6 188 60C 47 20 25 1.1 1.5 3.0 2,500 1,200 45 20 26 1.1 1.4 4.4 1,800 700 43 20 13 9.1 7.1 4.4 3.5 27 1.1 1.4 2.7 600 35C 41 19 13 8.8 7.2 4.4 3.5 28 1.1 1.5 2.2 200 25C 38 19 13 8. 7.1 4.5 3.4 29 1.2 1.5 2.1 150 37 19 13 8. 7.0 4.5 3.2 30 1.7 1.5 2.0 120 35 19 12 7. 6.9 4.5 3.2 31 1.6

MEAN 1.37 1.63 1.84 223 181 82.5 24.0 15.8 10. 7.36 5.24 3.B8 MAX l.B 3.3 4.4 2,500 1,200 210 33 20 1 8.2 6.7 4.3 MIN 1.1 1.3 1.3 1.6 65 34 19 AC-FT 84

NOTE NO GAGE-HEIGHT RECORD JAN . 25 TO FEB. 12, FE B. 18 TO APR. 10.

DISCHARGE. IN CU BIC FEET PER SECOND , WATER YEAR OCTO ER 1969 TO SEPTEMBER 1970 DAY OCT NOV DEC JUN JUL AUG SEP 1 3.2 2.8 3.2 3.2 3.4 94 5.1 3.7 2.4 1.9 1.3 1.1 2 3.4 2.9 3.4 3.1 3.4 99 4.8 3.5 2.2 1.9 1.3 1.1 3 3.5 2.9 3.3 3.1 3.4 30 4.8 3.4 2.2 1.8 1.3 1.2 4 3.3 3.0 3.3 .1 3.4 29 5 3.1 3.1 3.3 .1 3.4 13 4.3 3.3 2.3 1.7 1.4 1.2

6 3.1 13 3.3 .1 3.4 23 4.4 3.4 2.3 1.7 1.4 1.1 7 3.0 15 3.3 .1 3.4 18 8 3.0 6.0 3.4 .0 3.4 16 4.5 3.5 2.5 1.8 1.2 1.1 9 3.1 4.9 3.6 .1 3.4 14 4.4 3.5 2.7 1.8 1.2 1.1 10 3.2 4.5 3.5 .7 48 13 4.2 3.3 2.9 1.8 1.2 1.1 11 3.1 4.1 3.5 4.7 25 11 4.1 3.3 2.8 1.8 1.2 1.1 12 1.8 1.3 1.2 13 3.0 3.8 3.3 3.8 6.0 8.9 4.2 3.1 3.6 1.7 1.3 1.3 14 3.1 3.8 1.7 1.3 1.2 15 1.3 16 17 1.6 1.4 1.1 18 19 1.5 1.4 1.1 20 3.1 21 1.4 1.1 22 3.1 23 1.4 1.3 1.1 24 25 3.2 3.3 3.3 3.5 3.2 5.4 3.9 2.8 1.9 1.5 1.2 1.0 26 27 3.1 1.9 1.4 1.2 .98 28 3.1 3.1 3.0 3.5 82 5.0 4.0 3.1 1.9 1.4 1.3 .96 29 1.9 1.4 1.2 .99 30 2.9 3.1 3.1 3.4 5.9 3.8 2.8 1.9 1.4 1.2 1.0 31 2.9

TOTAL 97.9 128.4 101.1 118.2 253.6 508.5 127.4 93.7 72.1 50.1 40.2 33.23 MEAN 3.16 1.62 1.30 1.11 MAX 3.5 15 3.6 6.8 B2 99 5.1 3.7 3.6 1.9 1.4 1.3 MIN .96 AC-FT 194 255 201 234 80 66

NOTE. NO GAGE-HEIGHT RECORD JAN. 14 TO FEB. 16. LOS ANGELES RIVER BASIN

11101000 EATON CREEK NEAR PASADENA, CALIF.

DRAINAGE AREA.--6.47 sq mi. PERIOD OF RECORD.--March 1918 to September 1966 (discontinued). Combined monthly records of creek and di sions, July 1923 to September 1966 (discontinued).

gage is 1,230 ft (from topographic map). Prior to Oct. 28, 1938, at site 75 ft downstream at different datlfm. Oct. 28, 1938, to Nov. 4, 1959, at present site at datum 1.00 ft higher.

EXTREMES.--Max

Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G|H. Nov. 17, 1965 1930 329 3.38 Nov. 22, 1965 1900 769 4.40 Dec. 29, 1965 1500 *1,040 4l90 No flow for most of time Period of record: Ma m discharge, 2,400 cfs, Mar. 2, 1938, from record of inflow to Eaton flood-control

REMARKS.--Re 1,2 miles upstream for munici Angeles River basins elsewhere in this report. COOPERATION.--Records of diversions furnished by city of Pasadena. REVISIONS (WATER YEARS).--WSP 1315-B: 1920(M). WSP 1928: Drainage area.

DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL

1 0 17 48 5.4 0 .10 38 4.0 0 0 29 3.0 0 0 27 2.0 0 0 30 1.0 0 0

11

4.6 215 238 175 102

64

31

TOTAL 0 1,230.6 55 .70 5.80 MEAN 7.8 .19 MAX 251 3.1 MIN AC-FT m

t COMBINED DISCHARGE, IN ACRE-FEET, OF CREEK AND DIVERSION BY CITY OF PASADENA. LOS ANGELES RIVER BASIN

11101250 RIO HONDO ABOVE WHITTIER NARROWS DAM, CALIF. LOCATION. --Lat 34°03

DRAINAGE AREA.--91.2 PERIOD OF RECORD.--Fe

AVERAGE DISCHARGE.--14 years, 35.0 :fs (25,360 acre-ft pe (10,100 acre-ft per year).

the following table

Minimum daily Wtr y Date scharge G.H. Date Discharge 1966 Dec. 29, 1965 6,640 4.38 Several days 1967 Jan. 24, 1967 6,790 4.43 Jan. 21, Apr. 9, 1967 1968 Mar. 8, 1968 6,430 4.31 Feb. 18, Mar. 2-, 1968 1969 Jan. 25, 1969 17,700 7.23 Nov. 2, 1969 1970 Feb. 28, 1970 8,280 4.87 Jan. 31, 1970 Period of record: Maximum discharge, 17,700 cfs Jan. 25, 1969 (gage height, 7.23 ft); no flo

ity, 1,700 acre-ft) and by Sierra Madre, Las Flores, and Rubio debris basins. Many diversi

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

JUN JUL AUG SEP 1 2. .3 .1 55 190 .70 .70 1.9 1.7 1.9 2.1 2 2. 202 .40 1.7 2.3 .60 2.1 1.7 3 2. .3 .1 7.3 154 .40 1.7 2.3 .40 2.3 .70 4 2. 5 .6 6.5 56 1.0 1.7 1.9 .40 2.3 .80 2.1 .60

6 2. . 7 .4 2.9 565 .80 2.1 1.7 2.1 2.1 1.7 7 2. - 1 .8 249 6.4 1.0 1.7 1.9 1.9 .40 2.1 8 2. .4 325 1.7 9 1. !l 22 226 1.6 1.0 12 2.5 1.9 1.9 1.9 10 0

1 1. l 59 1.1 1.0 1.1 2.1 2.1 2.1 1.0 2 2. !l 9 59 1.4 .80 1.7 1.1 2.1 2.3 1.9 3 2. .7 .4 51 .80 .80 1.7 2.1 2.1 2.5 2.1 4 2. 43 4 23 1.0 7.7 1.4 2.7 2.3 .50 1.9 5 2. 71 . i 20 1.6 1.2 .50 2.5 2.1 1.9 2.7 6 1. 87 7 0 1,43 .0 24 1.1 1.4 1.7 3.1 1.4 2.5 5.1 8 2. 14 .6 23 1.2 1.0 2.1 3.1 1.9 2.3 75 9 2. .8 .80 17 1.2 1.0 1.6 2.7 1.9 2.3 13 0 2. .1 .60 17 1.1 .60 2.7 2.7 2.3 2.3 4.5 1 2. .8 .70 20 1.6 1.2 2.1 3.6 2.3 .50 1.6 2 2. 1.82 4.8 17 1.7 1.2 1.4 2.9 2.3 2.5 1.1 3 2. 80 .70 16 1.7 1.1 1.7 2.1 2.1 3.6 .40 4 2. 1,38 .40 17 1.6 168 1.7 2.1 .80 4.6 .40 5 2. 82 .40 14 .70 117 2.3 2.1 1.7 5.1 .40 6 2. 4 .40 1.6 .40 1.2 2.3 1.9 2.3 5.6 .40 7 2. .8 .60 1.1 .40 .60 2.7 2.3 2.3 2.7 .40 8 2. .6 1.0 1.2 .60 .80 1.2 1.6 2.3 1.0 .40 9 1. .4 2,020 1.7 1.0 .60 1.7 2.3 1.7 11 3 1. .5 78 395 1.1 .40 1.4 2.5 1.7 2.9 1.1 1.9

AN 2.24 284 85.5 61.3 42.9 10.3 2.28 2.02 2.23 1.79 2.28 4.B5 N .60 1.1 .40 1.1 .40 .40 .70 .40 1.0 .40 .40 .40 635 136 124 133 110 140 289 LOS ANGELES RIVER BASIN

11101250 RIO HONDO ABOVE WHITTIER NARROWS DAM, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 NOV DEC JAN FEB MAR APR MAY JUN JUL

1 I. 2.7 2.7 1. 73 1.7 237 6.7 2. 1. 3.6 2 2. 3.1 3B8 1. 118 1.7 4.9 7.6 2. . 0 3.6 3 1. 3.1 970 1. 48 1.4 2.9 8.8 2. 2. 3.4 4 2. 3.* 7.2 1. 1.1 8.1 9.9 6.8 1. 1. 3.4 5 2. 3.* 697 2. .80 1.6 2.9 6.4 1. 1 a 2.5

6 2. 3.8 966 1. 1.4 1.7 2.3 4.4 2. 2. 1.9 7 2. 1.110 36 0 1.6 1.9 9.4 1.9 3. 2. 3.1 1.4 1.6 1.1 2.9 2. 3.6 9 1. 2.0 166 1. 1.4 1.4 .70 4.4 2. 1. 7.6 10 5. 1.9 11» 1. 1.4 2.4 3.3 4.3 1. 2- 18 11 1. 1.9 94 1. 1.2 77 385 2.5 1. 3. 9 12 2. 1.4 82 1. .80 269 24 2.5 8. 2. 8 13 2. 1.4 82 1. 1.2 278 10 1.6 4. 2. 9 1* 2. 1.7 82 1. 1.1 43 2.3 1.4 2. 3. 3 15 2. 1.9 82 1. 1.0 2.2 3.1 1.9 1. 3. 4 16 1. 1.9 82 2. 1.0 1.6 2.9 2.3 2. 3. 8 17 I. 1.9 82 1. 1.2 1.6 2.9 2.3 3. 2. » IB 2. 1.7 94 1. 1.2 10 224 2.3 1. 2. 19 2. 1.6 124 1. .BO 2B 80 2.3 1. * 6 20 1. 5.5 112 1. 1.4 40 7.6 2.9 2. 6

21 2. 2.8 124 0 2.1 70 274 2.3 2. 2. 9.2 22 2. 5.0 130 1,370 3.1 100 164 4.1 2. 2. 9 23 1. 2.4 112 93 9 2* 1. 1.2 100 1,610 2.3 106 106 2.9 1. 2 . 9 25 1. 1.2 100 54 6.6 70 2.5 4.0 1. 3. 8 26 2. 1.2 100 3.« .80 25 2.9 3.4 1. 3. 7 27 2. 1.1 128 62 3.4 3.1 2.9 2.7 2. 3. 5 28 2. 1.6 166 112 1.7 3.6 11 1.7 2. 3. 5 29 2. 2.3 69 112 3.6 10 1.9 1. 3. 7 31 2. 1.6 63 2.9 - 3 1 0.9 , MEAN 2.2 39.3 173 13 8 10.1 46.2 53.2 3.63 2.4 2.6 0 5.2 11 MAX 5. ItllO 970 1,63 0 118 278 385 8.8 8. 3. 6 28 WIN 1. 16 0 934 1,C

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 AUG !EP

1 8.2 3.4 2.1 1.6 1.4 2.3 305 2.7 2.5 2.5 3.1 : . 2 8.2 3.6 1.6 1.7 1.4 l.l 18 2.1 2.5 2.3 3.6 : . 3 13 3.6 1.4 2.4 1.4 1.4 2.9 2.1 3.6 2.5 3.4 4 13 3.8 1.6 1.6 1.2 1.7 1.9 1.4 2.9 3.6 3.1 3. 5 17 3.8 2.1 1.6 1.9 2.5 1.9 1.2 3.9 3.8 2.9 3. 6 10 3.8 1.9 3.6 1.9 7.4 1.6 1.7 2.3 3.8 2.7 . 7 7.6 3.6 6.7 3.6 1.9 500 1.4 1.7 5.2 3.4 2.5 4. 8 8.2 4.1 3.4 2.3 2.1 1,320 2.5 1.7 2.1 3.4 2.9 4. 4.1 J. 10 8.2 3.8 1.7 2.9 5.2 1.4 3.1 2.1 2.5 3.4 2.1 if. 11 2.1 5. 2 4.1 3 3.1 3.1 1.7 1.6 28 21 2.9 2.7 3.6 3.6 3.8 '. 5 2.5 4.1 1.7 3.4 1.4 1.9 3.5 2.1 11 3.6 2.7 ..

7 3.1 3.8 2.5 3.1 4.0 4.8 3.1 2.5 12 3.1 3.6 ; . 8 3.1 14 455 1.9 1.1 1.4 3.6 2.1 11 3.1 3.1 i . 9 2.5 1,160 151 1.9 1.4 3.0 4.2 1.4 8.4 3.4 3.8 i. 2.9 ?.

1 3.4 820 2.1 1.9 1.4 5.1 1.6 4.8 6.9 2.7 I'l ]' 3 3.4 1.6 1.7 2.3 1.9 5.2 2.3 3.1 9.7 3.1 3.1 2. 4 3.8 1.7 2.1 2.9 2.3 1.7 2.1 3.6 11 4.6 3.4 2. 3.1 3|.

6 3.4 1.2 2.5 14 8 4.4 17 3.1 3.1 2.7 1. 9 3.B 12 2.9 1.9 1.7 1.9 2.1 2.9 3.1 3.4 3.1 2:. 0 3.6 303 1.7 1.7 1.7 2.5 1.9 1.7 3.6 3.1 J.

TAL 177.1 AN 5.71 X 17 1,160 455 132 78 1,320 305 4.8 12 6.5 4.1 5. N 2.5 1.2 1.4 1.6 1.1 1.1 1.2 1.2 1.7 2.3 2.1 J. LOS ANGELES RIVER BASIN

11101250 RIO HONDO ABOVE WHITTIER NARROWS DAM, CALIF.--CONTINUED

DAY

1 2.0 1.4 .4 59 758 106 100 30 5.1 130 2 2.0 1.6 .7 100 475 221 130 42 5.8 130 4 3.0 2.3 .9 34 250 2T 106 42 5.4 118 5 3.0 2.1 .1 457 154 327 118 42 4.6 77 6 2.5 2.1 .3 1,890 100 43 88 190 4.1 3.8 8 2.5 1.9 .7 55 112 100 94 65 4.6 4.4 9 2.5 2.1 .1 51 118 118 112 90 4.6 4.1 10 2.5 2.3 .9 51 400 190 112 4.1 4.8 3.6 11 2.5 8.7 .9 55 76 202 118 3.6 9.0 3.8 12 1.7 2.1 .7 55 76 190 118 3.8 4.1 4.4 13 1.6 1.7 47 43 82 214 118 3.4 3.4 3.8 14 2.9 1.9 67 100 82 226 124 2.3 3.6 3.8

16 2.1 32 .6 66 66 226 124 4.8 3.8 3.6 17 2.1 2.5 .9 66 62 214 100 81 4.4 3.6 18 2.3 1.9 29 621 59 350 106 325 4.4 3.8 2u 2.5 3.1 1.91C 238 66 238 112 226 3.8 117 21 2.5 1.6 1,49 ) 337 593 118 118 214 4.8 166 22 2.1 1.4 97

24 2.7 2.1 1>54( 3,020 32 25 3.1 51 94 118 190 26

26 1.9 65 4,17( 3,003 43 70 94 112 178 20

28 2.3 1.4 95( 1,470 36 82 12 124 166 13 30 42 1.7 7.4 8 31 2.1 - 2.1 s; 29 42 142 6.4

MAX 42 ' 134 7, 00 5,620 758 350 42 325 202 166 8 MIN 1.6 I 1.4 .4 34 29 27 88 2.3 3.4 3.6 3

MIN 1.1 AC-FT 133,200

DAY OCT NOV DEC JAN FE8 MAR APR MAY JUN JUL AUG SEP

1 6.6 6.6 2. 4.4 .62 1,290 2 7.4 5.4 1. 4.4 .84 365 3 6.8 5.4 2. 4.6 1.2 60 2.3 2.3 3.9 3.1 2.7 2.3 4 6.8 5.4 2. 3.6 1.2 986 1.7 2.7 1.9 2.5 2.7 2.7 5 7.9 5.4 2. 4.1 1.1 165 2.1 2.3 1.9 2.1 2.9 1.4 6 6.8 783 1. 6.4 1.2 38 3.4 2.7 1.9 2.9 2.3 1.2 7 7.1 84 1. 8.8 2.3 82 4.6 2.7 1.9 2.5 2.7 1.6 8 7.4 1.9 6. 7.8 1.7 66 3.8 2.7 2.3 2.5 2.7 1.9 9 5.4 1.6 3. 20 44 38 3.4 2.3 1.9 3.1 3.1 2.1 10 4.1 4.4 2. 112 1,120 27 3.1 2.1 1.9 2.7 3.1 2.1 11 2.7 1.9 2. 19 30 51 3.4 2.3 2.1 2.5 3.8 2.1 12 2.5 4.2 2. 8.8 18 55 3.1 3.1 3.1 2.5 3.1 2.1 13 3.1 8 1. 5.5 13 43 3.4 2.9 3.8 2.7 2.9 1.2 14 2.9 8 1. 25 11 32 2.7 3.4 2.1 2. 2.5 1.9 15 3.1 7 2. 13 8.5 28 2.7 4.8 2.1 2. 2.7 2.1 16 3.8 6 2. 246 7.4 23 3.4 3.8 2.3 2. 2.7 1.9 17 4.1 1 2. 7.6 5.8 17 3.4 2.9 2.1 2. 2.7 1.9 18 3.8 1.7 2. 7.1 4.6 14 5.4 3.8 2.5 3. 2.9 2.3 19 3.1 5.9 4.8 6.8 3.6 16 6.6 5.8 2.5 3. 4.4 1.9 20 3.4 7.9 2.5 7.9 2.9 8.5 3.6 3.6 2.7 3.4 4.8 1.1 21 3.8 1.9 22 24 5.1 25

27 5.1 3.8 2.9 6.1 2.1 3.1 2.7 7.4 2.7 4.1 3.1 1.6 28 6.1 1.9 2.3 6.5 1,640 29 6.1 30 6.6 1.7 6.0 3.4 162 2.5 2.1 2.3 2.7 2.7 2.5

MEAN MAX 7.9 783 6.2 246 1,640 1,290 6.6 9.7 5.4 4.1 4.8 2.7 MIN 167 119

AC-FT 134,700 LOS ANGELES RIVER BASIN

11101500 RIO HONDO NEAR MONTEEELLO, CALIF. LOCATION.--!. ight bank 900 ft of Montebellc DRAINAGE AREA.--116 sq mi (excluding area above Sar Fe Dam). PERIOD OF RECORD.--October 1928 to September 1970. GAGE.--W

AVERAGE DISCHARGE.--29 years (1928-S7), 51.5 cfs (37,280 acre-ft per year); median of yearly mean discharges, 36 cf s (26,100 acre-ft per year). EXTREMES 1966- 70 are given in the following table: daily Wtr y Date scharge Date 1966 Dec. 29, 1965 7,100 Nov. 7, 1965 r 1967 Jan. 24, 1967 8,130 Nov. 6, 1966 3U 1968 Mar. 8, 1968 7,900 Feb. 25, Sept. 1, 1968 513 1969 Jan. 25, 1969 20,000 Dec. 22, 23, 1968 el. 6 1970 Feb. 28, 1970 8,220 Sept.21, 1970

REVISIONS (WATER YEARS).--WSP 844: 1938(M). WSP 1928: Drainage area.

DISCHARGEi IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT JUN UL AUS =>! 1 164 248 11 71 242- 126 193 103 101 .6 2. 3*! 2 164 252 8.0 41 263 126 196 103 101 .4 3. 121 3 168 250 5.6 15 212 126 198 103 101 .1 3. 15

21 66 133 164 23 3.1 .6 230 101 6.3 .9 232 175 22 42 2.320 175 19 3.1 .8 230 104 14 .6 232 205 .8 230 103 45 .4 232 179 24 .90 1.000 164 17 121 21 230 101 5.3 .8 232 166 25 .80 434 164 17 123 29 159 101 5.6 .4 232 186

26 1.3 44 164 .9 124 212 104 103 5.2 .8 232 193 27 1.0 10 164 .6 123 193 104 103 5.0 .8 232 193 28 .no 6.5 124 .6 124 191 43 103 4.8 .8 232 141 Z9 84 4.1 2.340 .6 » 188 42 103 4.7 .4 210 22 30 232 5.6 105 37 191 103 104 4.6 .6 95 103 31 240 110 104 .8 4.9 4.293 I MAX 138 164 .9 232 MIN .80 .40 2.8 (t) 6,410 3,840 2,940 0 4,400 6,970 10.160 5,960 4,910 0 8,420 8,0

MIN 0

t COLORADO RIVER WATER, IN ACRE-FEET, RELEASED TO RIO HONDO VIA ALHAMBRA WASH, 1.6 MILES UPSTREAM, FOR GROUND] WATER RECHARGE IN RIO HONDO BASIN. LOS ANGELES RIVER BASIN

11101500 RIO HONDO NEAR MONTEBELLO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 MAR APR MAY JUN 1 188 4.4 148 .6 75 126 274 83 212 7.0 7.0 132 2 179 3.6 336 .4 140 126 123 103 212 6.3 7.3 30 3 193 4.1 It 160 .9 85 126 167 106 212 6.6 7.0 26 4 203 4.1 9 .6 66 144- 184 106 205 6.6 7.0 26 5 198 4.1 8 5 .6 140 123 159 104 218 6.3 6.6 74

6 191 3.4 1,1 0 .9 144 69 128 101 225 7.0 6.6 148 7 188 1> 490 2 3 .4 133 9.0 195 91 178 7.0 7.0 154 8 166 24 2 .1 95 8.0 159 1C1 13 7.0 7.3 154 9 173 6.0 1 4 40 65 7.3 130 112 7.7 6.0 13 173 10 166 6.3 1 1 96 65 8.3 130 128 6.6 7.0 26 133 u 196 6.C 8 103 65 171 526 131 6.6 8.5 29 86 12 186 4.9 < 6 104 64 376 ICO 133 22 7.7 25 179 13 164 4.9 8 113 65 346 164 133 9.0 7.7 25 220 14 112 4.9 1 4 92 65 91 119 133 6.6 8.0 26 222 15 112 . 4.9 1 6 90 61 9.4 93 135 J.7 8.0 27 235

16 118 4.1 1C4 92 61 9.9 93 139 8.0 7.0 28 235 17 116 3.6 107 110 61 9.9 126 108 7.7 7.7 29 230 18 103 45 116 130 64 17 457 10 7.0 7.3 26 232 20 69 82 154 133 65 78 156 146 7.0 8.0 22 240 21 87 44 154 87 66 109 494 146 7.0 8.0 14 232 22 112 144 158 1,890 66 124 248 139 7.3 8.0 38 218 23 85 144 150 119 68 130 9.4 140 7.0 8.5 69 212 24 15S 146 121 2,120 54 126 134 146 7.0 7.0 68 220 ?5 218 16C 107 78 19 96 88 178 6.6 7.3 81 220 7.0 50 139 220 6.6 7.3 99 227 88 54 9.4 79 220 7.0 7.3 98 218 28 88 160 162 137 114 60 82 220 7.0 7.3 104 242 29 6.3 154 99 131 140 39 218 7.3 7.0 96 168

MEAN MAX . 526 220 225 8.5 104 242 MIN 26

(t) 8,270 0 1,160 9,060

FOR GROUND-

OISCHARGEi IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TD SEPTEMBER 1968

MAY JUN SEP

1 158 162 9.4 131 119 155 271 137 220 120 9.0 5.3

3 160 160 7.3 135 121 177 130 59 225 235 9.4 6.6 4 160 156 8.0 137 123 179 126 8.0 228 235 10 78 5 160 154 9.0 137 121 182 126 8.0 230 248 11 196 6 124 60 225 235 8.C 200

8 142 148 121 111 230 235 9.4 184 9 150 148 124 120 196 18 135 111 133 235 13 173 10 156 146 114 70 16 10 150 111 9.4 160 9.4 162

11 156 146 114 70 8.5 109 152 111 9.4 8. 9.0 164 12 158 146 128 104 13 212 150 118 9.0 9. 9.4 173

14 156 111 112 99 22 93 148 113 9.0 9. 9.9 191 15 152 9.0 69 99 7.7 196 150 129 13 8. 9.0 196

16 150 9.0 146 99 7.3 214 152 18 13 8. 8.0 170 17 137 68 146 106 11 210 154 1 0 15 7. 8.0 12 18 139 142 584 119 5.6 65 154 1 0 14 7. 7.0 107 19 144 1,130 176 121 79 15 156 14 12 7. 8.0 215 20 182 544 15 123 122 13 154 18 11 9. 7.7 205

21 232 1,030 8.0 121 8. 12 154 1 6 11 7. 7.7 203 22 245 23 8.5 123 7. 12 154 16 13 7. 7.3 205 23 228 12 7.7 119 6. 12 154 1 4 102 7. 7.7 171 24 250 11 7.7 114 5. 9.0 156 1 4 242 8. 7.0 160 25 194 9.9 7.7 118 5. 48 160 1 2 235 T- 6.3 160 26 152 7.7 66 109 55 116 162 150 235 9. ) 7.3 168 27 154 8.0 133 193 133 114 175 117 238 9.C 7.0 171 28 156 37 130 15 135 118 173 8.4 162 14 7.0 179 29 156 70 130 9.9 137 116 168 89 13 9.' 7.7 184 30 164 150 9.0 10 7.7 133 31 158 130 144 109 188 11 6.6

MEAN 166 188 97.8 111 MAX 250 271 188 242 24f 17 215 MIN 137 AC-FT 10,210 11,180 6,010 6,810 4,040 10,130 9,030 7,410 6,610 4.68C 537 9,020 LOS ANGELES RIVER BASIN

11101500 RIO HONDO NEAR MONTEBELLO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

NOV DEC JAN FEB MAR APR MAY JUN JUL

1 9.4 158 7.3 7.0 130 497 89 137 126 18 213 15 2 11 162 7.7 7.3 220 460 181 177 131 12 210 16 3 128 144 7.0 8.1 300 431 211 151 141 12 200 15 4 210 139 7.3 7.5 167 34B 32 144 131 12 197 14 220 142 7.3 7.2 11 124 13 6 203 12 10 13 7 208 126 7.7 7.8 190 190 72 108 170 12 9.4 12 8 228 13 7.3 7.8 125 213 174 118 8 13 9.4 12 9 228 12 7.7 8.1 110 170 197 147 8 13 9.1 11 10 196 11 7.7 7.8 105 436 305 141 1 13 9.1 10 11 200 12 23 7.8 11C 151 263 131 1 16 9.4 9.7 12 222 8 7.3 7.2 100 151 266 124 .7 11 9.1 10 13 212 5 7.0 335 80 144 289 128 .7 11 8.8 11 14 220 9 7.0 419 178 121 296 124 .4 11 B.4 12 15 215 9 7.7 11 862 100 322 114 .4 12 8.1 12 16 171 16 56 9.2 122 81 295 124 10 12 7.2 13 17 166 10 8.0 85 81 81 251 111 12 7.2 13 18 171 57 7.0 339 582 97 388 108 157 11 7.5 13 19 179 72 7.0 464 453 100 368 114 151 10 - 47 13 20 105 61 8.5 1,650 370 97 286 118 157 9.7 152 12 21 9.9 8.0 7.7 1,490 285 539 194 121 157 9.4 154 12 22 8.5 8.5 6.6 717 12 23 62 81 81 105 141 74 50 13 24 156 8.0 7.0 982 2,520 77 86 97 118 80 34 12 25 140 7.7 93 8,600 6,010 72 86 92 121 90 25 12 26 137 7.7 1 92 128 90 21 12 27 150 7.3 9.4 1,310 90 21 11 28 156 7.3 8.0 610 922 70 128 141 128 90 19 11 29 101 7.3 8.5 358 65 12B 30 77 7.3 8. 0 289 56 114 134 116 226 18 14 31 70 225 16

MEAN 147 70.7 15.3 696 795 182 194 124 103 67.6 55.7 12. ft MAX 228 162 100 8,600 6',010 539 388 177 170 226 213 16 MIN 80 56 32 92 " 9.4 9.4 7.2 9.7

(t) 8,350 3,630 0 492 0 0 0 0 0 0 0

t COLORADO R IVER WATER, IN ACRE-FEET, RELEASED TO RIO HONDO VIA ALHAMBRA WASH, 1.6 MILES UPSTREAM , FOR GROUND- HATER RECHARGE IN RIO HONDO BASIN. NOTE. GAGE SUBMERGED JAN. 25 AND 26, BY HATER STORED BEHIND WHITTIER NARROWS I AM.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 DAY OCT NOV JUN JUL AUG SEPj

1 14 12 9.6 11 8.0 7.9 8.5! 2 15 12 9.4 10 9.1 8.5 7.4 3 14 78 108 103 122 72 155 9.4 10 8.8 9.6 7.1 4 14 165 110 101 122 888 162 9.3 9.4 7.4 9.4 6.8 5 13 148 112 110 122 279 153 9.2 9.4 7.1 9.4 6.3| 6 12 637 112 103 122 47 151 9.1 8.5 6.8 9.4 5.7 7 12 153 110 115 115 115 100 9.1 8.5 6.8 9.4 8 12 14 122 105 119 115 15 9.1 9 11 14 122 50 173 86 11 .0 10 11 13 108 160 840 50 9.6 .0 8.2 7.6 9.7 7.6 11 11 9.6 100 53 83 98 9.6 .0 8.2 7.4 9.5 12 11 61 101 49 34 90 9.0 .0 8.8 6.8 9.3 13 11 129 106 108 25 76 9.0 .0 9.4 6.8 9.1 14 12 120 110 190 20 65 9.0 8.8 9.0 7.4 9.4 15 12 131 103 101 8.5 7.1 9.0 16 12 137 101 283 64 40 8.8 8.8 8.0 8.2 7.5 7.0 17 12 129 101 17 126 30 9.1 8.7 7.4 7.1 .5 6.8 18 12 110 100 16 129 67 8.2 8.6 7.6 6.6 .5 7.1 19 11 108 103 16 119 131 7.9 8.5 7.4 6.B .5 6.8 20 11 120 103 60 110 129 7.1 9.1 7.1 5.5 .4 :° 21 11 112 10B 124 128 139 6.6 B.2 7.1 11 .1 22 11 95 103 120 140 124 7.4 7.9 7.3 15 .8 101 23 11 B6 103 97 137 119 9.1 B.5 7.5 12 .0 20 24 11 142- 106 16 131 130 9.1 9.0 7.9 10 .2 44 25 11 205 105 16 115 150 9.1 9.0 8.2 7.0 .6 46

26 11 106 108 57 12B 1BB 9.1 10 7.4 7.0 7.9 27 11 106 98 115 100 15B 9.1 11 7.4 7.0 8.2 20 28 12 90 96 119 1,680 144 9.1 12 7.5 7.0 8.2 91 29 12 96 105 12B 142 9.1 12 7.5 7.0 8.5 7.6 30 11 105 106 126 257 9.1 11 7.5 6.6 8'. 2 7.1 31 12

MEAN 11.8 115 106 96.6 IBS 180 41.3 9.37 8.2B 7.76 8.43 34.8 MAX 12 11 15 9.9 146 MIN 11 9.6 96 16 16 30 6.6 7.9 7.1 5.5 6.8 5.0 (t) 0 4,550 5 850 3,810 4,450 3,500 1,950 0 0 0 0 1,690 S90 WTR YR 1970 TOTAL 24,251.3 MEAN 66.4 MAX 1,680 MIN 5.0 AC-FT 48,100 t 25, 300 ,.t COLORADO RIVER WATER, IN ACRE-FEET, RELEASED TO RIO HONDO VIA ALHAHBRA WASH, 1.6 MILES UPSTREAM, FOR GROUND- WATER RECHARGE IN RIO HONDO B'ASIMt ' LOS ANGELES RIVER BASIN

11102000 MISSION CREEK NEAR MONTEBELLO, CALIF.

abutment of ""ortheas't o^Mon? ebello' RAINAGE AREA. - -4.16 sq mi.

ERIOD OF RECORD. --October 1929 to Sept ember 1970. Yearly estimate for 1938 published in WSP 1315-B. Prior to October 1944 , published as Rio Hondo Slough near Montebello. 2 ft (revised) above mean at datum 6.30 ft higher. VERAGE DISCHARGE. --41 years, 11.6 cfs (8,400 acre- (8,700 acre-ft per year).

: feet per second, gage he ight in feet) for the water years 1966-70 are contained in the follow! ng table:

Minimum daily tr yr Date Discharge G.H. Date Discharge 966 Dec. 29 , 1965 10 Long peri ods 0 967 Apr. 22 , 1967 14 7.13 do. 0 968 Mar. 8 , 1968 31 8.34 Oct. 23, 1967 .80 969 Jan. 25 , 1969 a39 Dec. 21-2 3, 1968 2.3 970 Mar. 4 , 1970 30 8.39 Several days 1.4 a Maximum dai iy. Period of

EMARKS.--F10W d t Fl tl tation by Legg Lake. No diversion matic diagr: this report.

OOPERATION.--R

EVISIONS. --WSP 1928: Drai nage area.

DISCHARGE , IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 AY OCT JUL AUG SEP

1 0 0 0 .60 .70 .80 .30 .10 2 0 0 0 .50 .50 C .20 .10 3 0 0 0 .40 .50 0 .20 .10 4 0 0 0 .40 .50 0 .20 .10 * 0 0 0 .40 .50 0 .20 .10 6 0 0 0 .80 .50 0 .10 .10 7 0 0 0 .50 .50 0 .10 .10 8 0 0 0 .50 .50 0 .10 0 9 0 .40 0 .50 .60 0 .20 0 10 c .10 0 .50 .60 0 .20 0 1 0 0 0 .40 .50 0 .30 0 2 0 .20 0 .50 .50 0 .30 0 3 c 0 0 .50 .60 0 .30 0 4 0 .10 0 .70 .30 0 .20 0 5 0 0 0 .80 .30 0 .10 0 6 .50 0 .10 .30 .30 0 .10 0 7 1.5 0 0 .10 .20 0 .10 0 8 .30 0 0 .10 .20 0 .10 c 9 0 0 0 .10 .20 0 .10 0 0 0 0 0 .10 .20 0 .10 0 1 0 0 0 .10 .20 0 .10 c 2 3.0 0 0 .10 .20 0 .10 0 3 .20 0 0 .10 .20 0 .10 0 4 .80 0 0 .40 .20 0 .10 0 5 .30 0 0 .80 .60 0 .10 0 6 0 0 0 .90 .80 0 .10 0 7 0 0 0 .80 .90 0 .20 0 8 0 0 0 .70 1.0 0 .20 0 9 0 4.0 0 1.1 0 .20 0 0 0 0 0 1.0 0 .20 0 1 0 . 90 . »«

TAL 0 6.60 4.80 2. Q 12.60 15.80 12.40 5.00 .70 000 AN 0 .22 .15 .0 7 .45 .51 .41 .16 .023 000 X 0 3.0 4.0 0 .90 1.1 .80 .30 .10 000 N 0 0 0 0 .10 .20 .10 .10 0 000 -FT 0 13 9.5 4 8 25 31 25 9.9 1.4 000 LOS ANGELES RIVER BASIN

11102000 MISSION CREEK NEAR MONTEBELLO, CALIF.--CONTINUED PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 DAY AUG SEP

1 0 .50 .70 2 0 .60 .6)

4 0 .80 .60 2.0 3.2 5.0 6.3 5.3 3.3 5 0 1.2 .60 2.1 3.3 5.2 6.3 5.0 3.3

6 0 .4 .80 2.2 3.2 5.2 6.3 4.2 3.2 3.8 4.2 8 C . .80 2.2 2.6 5.3 6.0 3.2 4.8 3.4 4.8 9 0 . .90 1.9 2.4 5.2 6.1 3.1 9.4 4.3 4.8 10 0 . 1.0 1.8 2.4 5.2 6.2 3.0 B.7 4.3 4.7 11 0 . 1.0 4.3 12 0 . 1.0 3.5 4.3 13 C . 1.0 1.8 4.5 6.6 6.4 2.8 11 3.2 4.2 14 0 . .90 1.7 4.8 6.5 6.3 2.8 11 3.7 4.3

16 0 . 1.0 1.9 4.5 6.2 4.5 2.8 8.8 3.7 5.2 17 .10 . l.C 2.0 4.5 6.1 4.8 2.7 8.2 3.3 5.2 18 .30 .0 1.0 20 .70 .90 1.1 21 .60 .80 l.C 2.0 4.0 10 5.1 2.6 8.8 2.8 4.4 22 .60 .SO 3.0 2.1 4.1 13 5.2 2.4 8.4 3.C 4.2 24 4.4 25 .80 .90 3.0 2.9 2.7 8.2 5.3 2.4 4.0 3.1 4.5

27 .90 1.0 2.3 3.0 2.1 7.3 5.3 2.4 5.9 3.2 5.2 28 .80 1.2 2.6 3.2 2.1 7.0 5.4 2.4 5.6 3.6 5.6 29 .80 1.1 2.5 5.8 30 31 .80 2.7 3.3 5.5 4.9 2.9

TOTAL 0 9.70 32.10 48.40 61.1 105.4 202.5 177.1 95.4 202.3 108.7 135.6 MEAN 0 MAX 0 5.0 6.0

AC -FT 0 19 64 96 121 209 402 351 189 401 216 269

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY OCT AUG SEP 1 6.2 1.6 1.4 3 5.7 1.1 5.8 6.4 1.5 1.5 4 1.6 1.5

6 1.6 1.6 7 1.6 1.6 8 5.2 7.3 25 7.3 4.8 4.0 2.4 1.6 1.9 9 4.8 1.7 5.4 6.0 7.4 21 7.0 4.9 4.1 2.4 1.6 1.7 10 4.2 1.7 5.4 6.0 7.4 13 6.7 4.9 3.8 2.4 1.6 1.7 11 5.0 1.6 1.7 12 7.0 1.6 1.8 13 5.9 1.6 1.8 14 5.4 1.6 1.8 15 4.9 1.6 1.9

17 3.4 1.9 18 3.0 1.8 9.3 6.2 7.1 8.7 6.8 4.5 2.5 1.8 1.7 1.9 20 2.4 1.7 2.9

22 1.6 2.6 23 .80 1.6 2.8 24 .90 25 .90

26 .90 1.6 2.7 28 1.0 1.3 2.7 29 1.3 2.8 30 31 1.0 6.5 7.4 7.4 3.7 1.6 1.2

MEAN 1.56 2.12 MAX MIN

AX 25 MIN .80 AC-FT 3.340 LOS ANGELES RIVER BASIN

11102000 MISSION CREEK NEAR MONTEBELLO, CALIF.--CONTINUED DISCHARGE. IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY

1 2. 3.0 2.5 3.0 13 15 10 8.1 2 2. 3.0 2.4 3.0 13 14 10 8.3 8.3 8.4 5.8 5.0 3 3.1 2.4 3.0 13 13 11 8.4 8.5 8.3 5.9 4.9 4 2! 3.1 2.4 3.0 1 '13 11 8.3 8.3 8.2 6.0 4.7 5 3.2 2.4 3.0 1 13 10 9.0 8.2 8.1 6.0 4.8

6 3.1 2.4 3.0 2 13 11 9.4 8.2 7.B 5.8 4.9 7 2.9 2.4 3.0 I 13 11 10 8.4 7.8 5.4 4.9 8 2.8 2.4 3.0 I 13 11 9.8 8.4 7.5 5.4 5.1 9 2.B 2.4 3.1 1 13 13 9.4 8.5 6.3 5.3 5.1 10 2.6 2.4 3.0 1 13 12 9.3 8.5 6.2 5.5 5.2

11 2.5 2.5 3.0 1 13 12 8.4 8.4 7.0 5.6 5.2 12 2.6 2.6 3.0 1 13 12 8.3 13 2.6 2.4 3.3 1 12 12 8.2 B.4 6.5 5.4 5.2 14 2.6 2.4 8.4 I 12 12 8.2 8.5' 15 2.7 2.4 7.8 1 12 12 8.3 16 2.7 2.5 6.3 1 11 11 8.3 8.3 6.3 5.4 5.2 17 2.7 2.5 5.0 1 11 11 8.3 8.2 6.1 5.5 5.3 18 2.8 2.4 5.0 1 11 U 8.3 8.4 6.1 5.4 5.3 19 2.9 2.4 9.4 1 10 11 B.3 8.4 6.0 5.5 5.5 20 2.9 2.4 29 1 10 11 8.3

21 2.6 2.3 0 1 11 11 8.4 8.3 6.1 5.7 5.8 22 2. 2.5 2.3 0 1 12 10 8.4 8.5 6.1 5.7 5.9 23 2.5 2.4 2 2 11 10 B.5 24 2 . 2.6 2.3 7 2 10 10 8.5 8.9 6.1 5.5 6.2 25 2.6 2.4 9 3 26 2. 2.6 2.9 8 2 27 2.6 4.0 6 1 28 2.5 3.5 0 1 11 8.8 8.7 B.4 6.1 5.4 6.2 29 2. 2.4 3.1 11 8.4 8.7 8.4 6.1 5.6 6.0 30 2. 2.5 3.1 11 8.3 8.3 7.8 6.0 5.1 5.9 31 2. .TOTAL 89. MEAN MAX 3.2 4.0 19 30 15 13 10 9.0 8.4 6.0 6.3 MIN 2. 2.4 2.3 3.0 10 10 8.3 8.1 7.8 5.9 5.0 4.7 AC-FT 17 J 163 159 738 827 1.2 AC-FT 3,040

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEM iER 1970 DAY MAY JUN JUL AUG SEP 1 5.7 .7 7.8 7.6 B.2 24 7.3 5.4 4.4 2.6 1.8 1.4 2 5.6 .B 8. 8.1 .8 20 7.2 5.2 4.2 2.6 l.B 1.4 3 5.7 .9 8. 8.9 .5 13 7.1 5.2 4.0 2.5 1.9 1.4 4 5.8 .0 B. 8.6 .2 13 6.9 5.2 4.1 2.5 1.8 1.4 5 5.7 .0 8. B.5 .0 20 6.8 5.2 4.1 2.5 2.0 1.5 6 5.8 B.O 8. 8.3 .9 14 6.7 5.2 4.0 2.5 1.8 1.6 7 5.8 14 8. B.5 .8 12 6.7 5.3 4.0 2.5 1.8 1.6 B 5.9 10 8. 8.3 .7 11 6.4 5.3 4.0 2.5 1.8 1.7 9 5.9 9.3 8. B.I .8 10 6.4 5.3 4.0 2.5 1.8 1.8 10 6.0 8.9 8. 11 1 9.8 6.3 5.4 4.0 2.5 1.8 1.8 11 6.3 8.6 8. 9.8 1 9.6 6.2 5.4 3.7 2.5 1.9 l.B 12 6.1 8.5 8. 9.6 1 9.5 6.0 5.4 4.0 2.5 1.8 1.9 13 14 15 6.5 8.7 B. 8.7 8.3 8.8 5.9 5.2 4.0 2.5 1.6 2.1

16 6.6 8.5 8. 11 8.0 8.6 5.8 4.8 4.0 2.5 1.6 2.0 17 6.6 B.2 8. 13 8.0 8.4 5.B 4.6 4.0 2.4 1.6 2.0 18 6.6 8.0 8. 10 B.I 8.3 5.7 4.4 4.0 2.2 1.6 2.0 19 6.6 7.B 8. 9.3 7.8 8.1 5.7 4.2 3.8 2.2 1.6 2.0 20 6.6 7.8 B.

21 1.4 l.B 22 1.4 1.8 23 1.8 2.8 1.8 1.4 1.8 25 l.B 26 1.8 27 1.8 1.5 1.7 28 6.8 7.5 7.6 9.0 14 7.3 5.7 4.5 2.6 1.8 1.5 1.7 29 1.7 1.5 1.6 30 1.7 1.4 1.6 31 6.9 7.6 8.5 7.6 ------4.4 _ 1.8 1.4 TOTAL MEAN MAX 7.0 14 8.5 13 16 24 7.3 5.6 4.4 2.6 2.0 2.1 MIN 101 105 LOS ANGELES RIVER BASIN

11102250 MISSION CREEK BELOW WHITTIER NARROWS DAM, CALIF.

LOCATION.--Lat 34°01'1S", long 118"04' 15'.' , left bank about 500 ft downstream from a f Pico.

PERIOD OF RECORD. --December 19SS to Septemb er 1970 (discontinued). irel (Corps of Engi­ neers Survey) .

in the following table:

Maximum daily Minimu rt daily Wtr yr Date D ischarge Date Discharge 1966 Mar. 27, 1966 6.3 Most of time 0 1967 Dec. 4, 1966 5.4 Many days 0 1968 July 2, 1968 3.3 do. 0 1969 Jan. 12, 15, 1969 2.9 Mar. 12 to Sept. 30, 1969 0 1970 (a) Entire year 0

Period of record: Maximum daily discharge, 18 cfs Jan. 6, 1959; no flow for many days

in this report.

DISCHARGE, IN CUBIC FEET PER SECOND. MATER YEAH OCTOBEH 1965 TO SEPTEMBER 1966 JUL AUG SEP

1 0 .20 .30 2 0 .30 .60 3 0 .30 .20 4 0 .2C .20 5 0 .20 .30 6 0 .20 .40 7 0 .40 .50 B C .30 .50 9 .30 .20 .50 10 .30 .20 .50 11 .20 .40 .40 12 .20 .20 .40 13 .BO .20 .30 14 .20 0 .30 15 .10 C .30 16 C .10 1.5 17 0 .10 2.7 IB 0 .10 .50 19 0 .10 .50 20 0 .10 .40

21 0 .10 .40 22 C .10 .40 23 0 .10 .40 24 0 0 .40 25 .20 0 .40 26 2.2 0 .40 27 6.3 0 .40 2B .70 0 .40 29 .50 0 .40 30 . 50 0 .40 31 .30 ______OTAL 0000 0 12. BO 4.10 0 0 0 0 15.30 EAN 3000 0 .41 .14 0 0 0 0 .51 AX 0000 0 6.3 .40 0 0 0 0 2.7 IN 0000 C 0 C 0 0 0 0 .20 C-FT 0000 0 25 B.I 0 0 0 0 30 AL YR 1965 TOTAL 9.90 MEAN .027 MAX 7.2 WIN 0 AC-FT 20 TR YR 1966 TOTAL 32.20 MEAN .OBB MAX 6.3 MIN 0 AC-FT 64 LOS ANGELES RIVER BASIN

11102250 MISSION CREEK BELOW WHITTIER NARROWS DAM, CALIF.--CONTINUED DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

.40 C 0 .50 1.2 1. .90 .1 1.2 1.4 2.2 .40 C 0 .50 1.2 1. .90 .3 1.2 1.4 .C 2.3 .40 0 4.3 .50 1.2 1. .90 .4 1.2 1.2 .8 2.0 .30 0 5.4 .40 1.2 1. .90 .5 1.2 1.1 .6 1.9 .20 C .60 .40 1.9 1. .90 .5 1.2 1.1 .8 2.2

.10 0 1.7 .40 1.7 1. .90 .5 1.3 1.2 .8 2.C .20 1.7 .40 1.2 1. .0 .5 1.5 1.2 .8 1.9 .20 1.5 .40 1.2 1. .0 .5 1.5 1.2 .9 1.8 0 L.4 .40 1.2 1. .1 .5 1.5 1.2 .9 1.7 0 1.4 .40 1.2 1. .2 .5 1.5 1.3 .9 1.8

C 1.3 .40 1.2 1. .1 .5 1.5 1.3 .8 1.8 0 1.1 .40 1.2 1. .1 .5 1.5 1.3 .7 1.9 0 1.0 1.9 0 .90 .40 2.1 1. .1 .6 1.5 1.3 .8 1.9 0 .80 .40 1.2 1. .0 .6 1.4 1.3 .9 1.9

0 .70 .40 1.2 1. .90 .6 1.4 1.3 .9 1.9 0 .60 .40 1.2 1. .1 .7 1.4 1.3 .8 1.9 0 .60 .40 1.1 1. .1 .4 1.0 1.1 .7 1.9 0 .60 .50 1.1 1. .0 .3 .90 1.1 .6 1.9 0 .60

24 0 0 .60 2.1 1.0 1. .0 .3 1.3 0 .8 .9 25 0 0 .60 1.5 1.0 1. .0 .3 1.3 0 .8 .9 26 0 .10 .60 1.2 l.l 1. .1 .3 1.3 0 .8 .8 27 0 0 .60 1.2 1.1 1. .3 .3 1.3 0 .9 .8 28 0 0 .60 1.2 1.1 1. .3 .3 1.3 0 .0 .8 29 0 0 . 7C 1.2 1. .2 .3 1.3 0 .0 .8 30 C 0 .70 1.2 1. .1 .2 1.3 0 .3 .8 .60 1.2 . 0 .1 0 .3

MAX .40 .20 MIN 0 C 0 .40 1.0 .90 .90 1.1 .90 0 0 1.7 65 79 48 108 114

DISCHARGE . IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY OCT MOV OEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 .7 .4 0 .40 .20 .20' 0 2.5 .2 .79 2 .8 .4 0 .40 .20 .20 0 31.3 .3 .86 3 .5 0 .40 .20 .20 0 2.0 .4 .80 4 .5 0 .40 .30 .20 0 2.0 .5 .80 5 .6 C .40 .20 .10 0 2.0 .6 1.2 6 .6 .20 .50 .20 .20 .14 1.9 .5 .3 7 .7 .30 .50 .10 .20 0 1.9 .6 .3 8 .8 .20 .50 .10 .70 0 2.1 6 .3 9 .7 .20 .50 .20 .40 0 2.1 .7 .3 10 .8 .30 .50 .10 .30 0 2.1 7 .1 11 .8 .40 .50 .20 .30 C 2.0 .8 .65 12 .8 .50 .50 .20 .30 0 1.7 .8 .70 13 .6 .50 .50 .20 .30 0 1.6 .0 .66 14 .9 .40 .50 .20 .30 0 1.4 .9 .60 15 .9 .30 .40 .20 .40 0 .91 .9 .88 16 .0 .40 .30 .20 .40 0 .43 .9 .5 17 .0 .40 .30 .40 .40 .17 1.3 .8 .2 18 .2 .50 .30 .40 .30 .10 1.2 .7 .1 19 .6 .40 .30 .30 .20 .04 1.6 .7 .5 20 .30 .30 .40 .40 .02 1.6 .4 .2 21 .20 .30 .40 1.2 .01 1.7 .3 .4 22 .20 .30 .40 .50 .02 1.8 .2 f l 23 .20 .30 .20 .10 .03 2.2 .2 .0 24 .90 .20 .30 .20 .10 0 1.9 .1 .8 25 .7 .20 .30 .20 . .10 2.9 2.1 .77 .7 26 . .30 .20 .20 .10 2.6 2.3 .80 .8 27 . .30 .20 .30 .10 1.9 2.0 .77 .9 26 . .30 .20 .30 .10 2.5 1.7 .68 .8 29 . .40 .20 .30 .10 2.2 1.4 .69 .6 30 . 0 .40 .20 .10 2.0 1.5 .66 .B 31 .40 .20 . 20 l '* '"

MEAN 1 1.42 .27 .36 .24 .28 0 0 .49 1.79 1.38 1.36 MAX 2.2 .50 .50 .40 1.2 0 0 2.9 3.3 2.0 2.4 MIN 0 C .20 .10 .10 0 0 0 .43 .61 .60 AC-FT 1 85 17 22 14 17 0 0 29 110 B5 81 LOS ANGELES RIVER BASIN

11102250 MISSION CREEK BELOW WHITTIER NARROWS DAM, CALIF.--CONTINUED DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 APR MAY JUN JUL AUG 1 1. .0 8 2. .08 .34 2 1. 1 .0 9 2. .06 .27 3 1. .0 8 2. .04 .22 4 2. .0 i 2, .01 .14 S 2. .0 2* .C3 .10 6 2. .0 2 .13 .07 7 2. .0 2. .11 .04 B 2. .0 2. .12 .04 9 1. .0 2. .15 .04 10 2. .0 2. .19 .04 11 1. .0 2. .16 .02 12 2. .0 t 2. .14 0 13 2. .9 2. .10 C 14 2. .9 2. .08 0 15 2. .9 2. .15 0 16 2. .9 2. .08 0 17 2. .9 > 2. .04 0 18 2. .9 2* .04 0 19 2. .9 , 3 .04 0 20 2. .0 1 .06 C 21 I. .8 6 .04 0 22 1. .8 I. .08 0 23 1. .8 2. 1.0 0 24 2. .8 6 ..13 0 25 2. .8 1 .39 0 26 2. .8 t 7 .45 C 27 2. .7 8 .50 0 28 2. .7 6 .49 0 29 2. .8 f 4 0 3D 2. .8 : . 2 C 31 2. 0 0

MEAN 2.0 1 90 I 9 1. 9 .18 .043 MAX 2. .0 2 9 1.0 .34 MIN 1. .7 . 0 .01 0 AC-FT 12 113 1 2 1 4 10 2.6

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

NOV OEC JAN FEB MAR APR MAY JUN JUL LOS ANGELES RIVER BASIN

11102300 RIO HONDO BELOW WHITTIER NARROWS DAM, CALIF.

CATION. --Lat 34°01'00", long 11 8°05'15", in Paso de Bartol o Grant, Los Angeles County, on right levee 0. 2 mile upstream from Beverly Boulevar d, 0.4 mil e downstream from axis of Whi ttier Narrows Dam, and 1.0 mile no rth- east of 'Montebello . IAINAGE AREA.--124 sq mi. RIOD OF RECORD. --October 1966 t r 1970. ic map) .

TREME S.--Maximums and minimums (discharge in cubic f eet pe r second, gage height in fee t) for the water y ears 1967 able: Maximum Mini mum daily r yr Date Dis charge G .H. Date Di s charge 67 Jan. 24, 1967 19,100 9 .73 Oct. 29-31, 1966 0 68 Mar. 8, 1968 17,600 9 .23 July 29-31, 1968 0 69 -Jan. 25, 1969 38,800 13 .82 Seve ral days 0 70 Mar. 4, 1970 8,620 6 .14 0 P d: Maximum discharge, 38,800 cfs 25, 1969 (ga ge height, 13.82 ft), from rating curve nded above 15, 000 cfs on basis of ga te openings at da m at gage he ights 12.32 and 13.82 ft; at s in each year

MARKS .--Records goo d. No gage-height rec ord June 27 to Ju ly 28, 1969. Flow regulated by Whitti er Narro bine d capacity, 1, 700 acre-ft) and sever al small debris b Whitti " l" l Dam. Many divers ions Gabri belo w Santa Fe Dam s Angele s River basi 01 >CHARGE,, IN CUBIC FEET PER SECOND WATER YEAR OCTOBER 196 6 TO SEPTEMBER 1967 AY DCT t JUN JUL AUG SEP

1 192 b.8 136 6.8 75 116 191 101 226 71 55 134 2 178 ).4 236 6.8 121 116 184 126 226 71 36 63 3 176 1 ? 793 6.8 101 116 184 126 233 71 19 59 4 186 ).4 259 6.8 67 131 188 59 5 197 i.4 639 6.8 136 111 12 94 6 174 i.4 955 6.8 136 77 148 126 233 55 10 154 7 196 91< ) 350 6.8 116 14 226 126 203 55 6.8 154 8 185 33 ) 257 6.8 86 6.8 172 126 30 59 8.4 166 9 194 1 191 34 63 6.8 142 166 12 67 10 184 10 190 .8 154 91 63 12 . 142 172 14 67 10 152 1 214 .8 131 91 67 132 518 160 16 67 10 117 2 204 .8 131 96 67 291 121 160 35 43 10 191 3 194 .8 131 96 67 403 191 160 34 30 10 240 4 136 .2 136 91 67 1 0 148 160 36 61 10 254 5 128 .2 120 86 67 6 121 160 57 55 10 261 6 134 .6 131 81 67 0 116 160 59 55 10 261 7 136 .3 126 86 67 4 126 119 63 55 10 254 8 113 3 121 91 67 8 434 254 9 118 11 148 91 67 4 0 94 9 154 91 67 7 154 166 55 63 12 261 1 98 5 148 71 67 91 382 172 55 67 12 254 2 138 13 148 1,320 67 1C6 296 191 55 76 12 240 3 102 13 142 400 67 116 240 4 154 13 121 Si 060 63 116 159 219 55 76 160 254 5 243 14 ) 116 205 44 101 70 219 55 76 101 254

6 246 14 i 111 157 34 59 148 247 55 36 116 256 7 240 14 131 67 59 24 247 8 96 14 154 136 121 64 96 240 67 51 126 263 9 0 14 90 126 136 63 226 76 51 116 191 0 0 13 b 19 159 126 91 226 76 51 111 184 1 51 116

AN 150 97.7 209 288 77.0 97.0 182 165 90.3 58.8 49.8 198 X 136 403 518 247 233 76 272 263 N 0 2.3 8.4 6.8 34 6.8 47 16 12 30 6.8 59

TR YR LOS ANGELES RIVER BASIN

11102300 RIO HONDO BELOW WHITTIER NARROWS DAM, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

NOV DEC JAN FEB MAR APR MAY JUN JUL 1 17B 1B4 281 148 131 154 229 102 233 89 11 67 2 184 184 59 154 131 184 234 91 226 212 30 67 3 184 184 51 166 131 184 131 71 240 212 30 67 4 191 184 47 160 121 141 5 191 6 184 7 172 178 180 160 136 27B 126 121 200 219 15 184 8 178 176 160 160 184 9 184 133 226 30 184 10 191

11 10 15 30 148 12 198 184 155 142 59 178 126 31 1C 3.6 34 154 13 191 164 170 136 85 190 126 36 36 2.3 34 160 14 184 3.6 30 172 15 172 11 34 2.3 10 172 16 17B 2.3 3.6 161 17 166 103 190 154 28 3.6 3.2 18 68 28 3.6 77 19 86 40 125 16C 40 28 2.3 191 20 160 658 416 160 144 40 131 69 40 28 1.3 198 21 205 2.3 191 22 219 267 51 166 51 40 148 211 44 28 2.3 191 23 101 28 1.1 178 24 219 47 44 160 44 40 86 182 247 15 3.6 184 25 7.3 3.6 219

26 172 44 74 104 80 116 138 160 247 2.3 2.4 219 27 172 2.3 1.4 219 28 166 67 142 113 154 111 142 24 158 1.3 2.3 1^98 29 166 101 2C5 30 31 172 154. 131 116 204 0 55 TOTAL

MAX 219 2.14C 1,030 196 227 240 MIN 68 16 6.8 0 1.1 3.2

DISCHARGE, IN CUBIC FEET PER SECOND , HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

1 4.9 60 2.3 0 212 2,550 81 142 111 41 184 8.4 2 1.3 66 1.3 15 6.8 3 80 48 1.3 30 178 456 210 148 121 12 184 6.8 4 154 42 0 30 172 414 71 142 1C1 10 178 6.8 5 184 54 0 30 6.8 6 166 54 116 7.5 12 6.8 6.8 7 166 48 0 36 2,410 "267261 86 121 126 7.5 6.8 8 184 54 0 16 4,930 148 121 74 7.5 8.4 6.8 9 198 47 0 8.4 4,610 240 160 121 96 7.5 8.4 3.4 1C 213 42 8.8 8.4 2,140 541 Z40 121 34 7.5 6.8 0 11 212 148 198 226 121 34 7.5 6.8 0 12 212 122 34 6.8- 328 184 219 126 44 7.5 10 0 13 205 82 30 108 320 178 233 126 47 7.5 14 0 14 7.5 8.4 0

16 205 44 74 16 665 131 261 151 28 8.0 6.8 0 17 191 34 34 35 282 126 233 111 74 8.0 5.2 3.5 18 154 81 14 222 665 131 305 1Q6 192 8.0 6.8 24 19 136 81 1.3 406 933 136 282 111 178 8.0 73 21 20 95 82

21 2.3 34 0 1,780 21 22 2.3 21 23 29 34 0 285 6,780 106 106 116 148 206 111 19 24 126 34 0 1,200 8,860 96 101 116 136 200 86 13 25 145 30 48 19,900 19.400 91 96 116 126 184 76 10

27 136 14 11 7,840 9,090 81 126 116 140 180 40 6.7 28 148 2.3 29 126 2.3 22 30 94 2.3 0 226 71 126 111 138 205 10 11 31 84 0 219 71 116 ...... 198 10

TOTAL 4,264.8 2,641.9 450.3 63.386.4 96.863 8,837 5,269 3 ,768 3,225 2,030.5 1,941.2 277.7 MEAN 138 88.1 MAX 247 166 85 19,900 19,400 2,550 305 160 192 206 191 24 MIN 1.3 2.3 0 0 172 71 71 58 28 7.5 5.2 0

HTR YR 1969 TOTAL 192,954.80 MEAN 529 MAX 19,900 MIN 0 AC'FT 382,700 LOS ANGELES RIVER BASIN

11102300 RIO HONDO BELOW WHITTIER NARROWS DAM, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 AY OCT NOV DEC JAN FEE 1 6.3 28 121 116 126 1,080 91 .76 2B .60 19 4.4 2 17 28 121 121 136 421 72 0 28 0 19 6.B 3 24 67 111 116 148 199 72 0 34 0 24 10 4 22 111 111 111 154 723 91 7.6 36 0 24 10 5 19 101 111 121 160 573 91 28 40 0 15 10 6 1 303 111 111 154 205 155 28 36 19 6.8 10 7 1 307 111 121 148 198 115 28 40 40 1.3 10 8 1< 59 116 121 148 184 59 28 36 36 2.3 10 9 1 51 121 69 217 136 47 30 34 40 3.6 10

1 19 47 111 84 242 136 47 30 36 40 2.3 10 2 22 96 111 75 86 131 47 34 40 44 3.6 12 3 24 16C 116 51 40 1.2 12 4 30 36 0 12 5 22 154 116 110 55 91 47 28 40 14 1.3 26 6 22 148 111 372 86 81 47 24 34 5.2 2.3 40 7 22 142 111 67 142 81 47 22 34 1.2 1.9 44 8 34 1.3 22 55 0 28 36 1.0 44 55 1 2.3 131 121 148 148 172 47 14 40 1.3 40 63 2 0 126 116 142 154 160 47 5.2 40 2.3 40 101 4 0 166 121 51 148 116 3. 2.3 24 6.8 47 111 5 0 212 116 47 136 131 3. 3.6 3.6 8.4 47 121 6 0 121 121 73 136 154 2. 12 2.3 8.4 22 101 7 0 121 111 142 131 154 2. 30 2.3 8.4 5.2 101 8 7.0 111 116 126 1,230 148 z - 34 2.3 18 5.2 81 0 30 126 116 131 ----- 266 1. 24 2.3 19 3.6 0

AN 16.4 125 116 118 190 217 65. 21.0 29.2 15.5 15.8 40.1 X 30 307 121 372 1,230 1,080 19 36 51 44 47 121 N 0 28 111 47 55 81 0 2.3 0 0 0 3 88 LOS ANGELES RIVER BASIN 365

11102500 RIO HONDO NEAR DOWNEY, CALIF. LOCATION.--Lat 33°56'48", long 118°09'43", in San Antonio Grant, Los Angeles County, on left bank 700 ft upstreai from Stewart and Gray Road bridge, 1.0 mile upstream from mouth, and 1.5 miles west of Downey. DRAINAGE AREA.--143 sq mi (excluding area above Santa Fe Dam). PERIOD OF RECORD.--March 1928 to September 1970. GAGE.--Water-stage recorder. Datum of gage is 91.4 ft above mean sea level (levels by Los Angeles County Flood! Control District). Prior to Oct. 31, 1951, at site 700 ft downstream at datum 1.5 ft lower. EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water years 1966 Maximum Mini num daily Wtr yr Date Dis charge G.H. Date Dis charge 1966 Dec. 29, 1965 19,000 9.18 Several d lys 0 1967 Jan. 24, 1967 20,100 9.47 Many clays 0 1968 Mar. 8, 1968 17,900 8.80 0 1969 Jan. 25, 1969 46,900 15.15 do! 0 1970 Feb. 28, 1970 7,540 5.47 Dec. 28, 1969 .Q3 P eriod o f record: Maximun discharge, 46,900 cfs Jan. 25, 1969 (gage he ight, 15.15 ft); no flow at ti-j. most years. REMARKS .--Flow regulated since January 1956 by Whittier Narrows floo d-control reservoir (capacity, 36,160 al debr is basins above Whittier Narrows Dam Many diversions above station for domestic use and irrigation AT time Hond^j and Los Angeles Rive COOPERATION. --Records furnished by Los Ange les County Flood Control District and reviewe d by Geo logical Survey. REVISIONS. --WSP 1928: Drainage area. DISCHARGE, IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY OCT NOV "=' AUG SEP

1 0 0 .10 805 12 1.4 .30 0 .30 1.4 .30 0 2 0 0 .10 492 10 .50 .30 .20 .30 .50 .50 .110 3 0 0 .10 333 .50 .20 .30 .30 .30 .30 .50 .20 4 0 0 .10 331 .30 .30 .30 .30 .30 .30 .30 .20 5 0 0 .10 433 .30 ,20 .50 .30 .30 .50 .20 .30 6 .10 0 .10 534 178 .20 1.0 .30 .30 1.0 .20 1.0 7 .20 0 .10 364 .0 .30 .30 .30 .30 1.4 .20 .50 8 .20 0 .10 152 .4 .50 .30 .20 .50 1.6 .30 .20 9 .20 0 138 67 .4 1.0 .30 11 1.0 1.8 .30 l fi 1C .20 .10 44 32 .8 1.0 .20 1.0 .50 1.4 .30 IP ,L 11 .20 .10 12 .30 .20 70 .30 .4 .30 .30 .30 .30 1.0 .10 .20 13 .30 .30 7.4 .30 .4 .30 .30 .50 .30 .50 .1C 0 14 .20 93 4C 1.4 .4 .50 .30 .50 .0 1.0 .20 .10 15 .20 81 4.1 1.6 .0 1.4 .30 .30 .0 1.0 .30 0

16 0 373 2.0 1.0 1.0 1.4 .30 .30 .4 .50 .30 17 0 1,830 i.a .50 .30 2.0 .30 .30 .0 .30 .50 .3b4 ia 0 60 1.4 .30 .50 1.0 .30 1.0 .4 .30 .50 23 19 .30 4.4 .20 12 .30 1.4 1.0 .50 .50 1.0 .50 5.8 1.0 1.4 .50 21 .20 1.4 .30 .30 .30 1.0 .30 .50 1.0 1.0 1.4 2£ 22 .20 3,750 3,2 0 .50 1.0 .50 .20 .30 1.0 1.4 2B 23 .20 5,570 .30 .30 .50 .50 .30 .20 .30 1.0 .50 3S 24 .20 8.310 0 .30 .0 34 .30 .30 .50 .50 .20 sp 25 .23 2,790 0 .30 .0 30 1.6 .20 .30 .50 0 .29 26 .20 1,070 0 .50 .4 .30 1.0 .20 .20 .50 0 .20 27 .20 32 .30 .30 .0 .30 1.4 .30 .30 .50 .10 .20 28 .20 0 1.0 .30 .4 .50 1.6 .30 1.4 .50 0 .20 29 0 0 4,810 .30 1.0 1.4 .10 1.4 1.0 .10 ! *, 30 0 .10 570 223 .30 .30 0 1.0 1.0 .50 31 0 1,090 1.6 . 30 .20 .30 .30 ...:!f 36.8J) .68 .62 .80 .38 1.23 MAX .30 8,310 4.810 805 178 34 1.6 11 1.4 1.8 1.4 28 MIN 0 0 0 0 .30 .20 .20 0 .20 .30 0 23 7r

WTR YR 1966 TOTAL 34.983.60 MEAN 95.8 MAX 8,310 MIN 0 AC-FT 69,390 LOS ANGELES RIVER BASIN

11102500 RIO HONDO NEAR DOWNEY, CALIF.--CONTINUED 01SCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 AY OCT DEC

1 .20 .10 .30 0 .30 I .0 67 .10 .20 .20 1.4 4.4 I .30 0 64 0 .30 .50 3.6 .10 .30 .10 1.0 1.0 3 .30 .10 617 0 ..30. .10 .20 .20 .50 .20 5.2 .30 4 .30 .20 4.4 0 .30 2 .0 l.B .10 .30 .20 4.4 .20 5 .20 .30 346 0 .30 0 .30 .10 .30 0 1.4 .30 6 .20 .20 612 0 0 C .40 .20 .30 .10 .30 .30 7 .30 1,240 26 0 0 C 32 .20 .30 0 .10 .30 8 .30 11 1.8 0 0 .30 .30 .30 .30 0 0 .50 9 .30 3.6 1.0 0 0 .30 .30 .30 1.4 .20 .10 .30 10 8.3 .50 .30 0 0 .30 .30 .30 .50 0 .30 1.4 11 .30 .30 .30 c .20 38 139 .20 .30 0 .30 .0 12 .30 .20 1.0 0 .30 63 1.0 .20 1.4 0 .20 .C 3 .30 .10 .50 0 .30 94 .30 0 .30 0 .20 .4 4 .30 .1C .30 .20 .30 32 .20 .20 .20 .20 .20 .8 5 .30 0 .30 .20 .20 .20 .10 .30 .20 .30 .20 .4

6 .30 0 .20 .30 .20 C .30 .30 .20 .30 .30 1.0 7 .20 .30 .10 .30 .20 C .20 .30 .30 .30 .30 .30 8 .10 .20 0 .50 .30 0 72 .20 .20 .30 .30 .30 9 .10 .30 0 .30 .20 0 43 .20 .10 .30 .30 1.8 0 .20 7.3 .20 1.0 .30 0 6.7 .20 .20 .30 .30 .30

1 .30 .50 .20 .30 .30 .10 167 .30 .30 .30 .30 .30 2 .10 .20 .20 1,360 .50 .10 82 .30 .30 .50 .50 .30 3 0 .10 0 214 1.0 .20 1.0 .30 .20 .30 .30 .30 4 0 0 0 5,120 1.0 .10 45 .30 .20 .30 .20 .30 5 C 0 0 94 3.6 .20 .50 .30 .20 .30 .30 .30 6 0 0 0 .30 .50 .30 .30 0 .20 1.0 .30 1.0 7 .20 0 o .30 .50 .20 .30 0 C .50 .30 3.6 8 .20 .20 0 .30 .50 .20 6.9 .10 0 1.0 .30 47 9 .30 .30 0 .30 0 .30 .20 .20 1.0 .30 1.4 0 .30 .30 0 .30 0 .20 .20 .20 1.0 .30 .30 1 .20 0 .30 74 .30 1.0 .50

AN X 8.3 1,240 617 5,120 3.6 94 167 .30 1.4 1.0 5.2 47 N 0 0 0 0 0 0 .10 0 0 0 0 .20 C-FT 29 2,510 3,320 13,470 19 20 40 147 i,250

AY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .30 .20 .20 0 .30 1 .0 76 2.8 4.4 0 .30 0 2 .30 .30 0 0 .30 .30 20 2.8 1.8 0 .30 0 3 .10 .30 0 0 .3C .30 .40 2.8 2.0 .30 .30 0 4 0 .30 0 0 .30 .30 .to .30 2.0 .30 .30 0 5 0 .50 1.4 0 .30 .30 .40 .30 .20 1.4 .20 0 6 0 l.C .40 0 .30 1 .40 0 D .50 .30 .30 7 0 .30 2.7 0 .30 19 .40 0 .20 1.0 1.0 1.8 8 0 .30 2.2 0 4.0 4,30 .30 0 9 .20 .20 0 0 15 .0 .30 0 0 .30 .30 .30 10 .30 0 0 0 1.4 .0 .30 0 0 .50 .30 .30 11 .30 0 0 4.2 .30 .0 .30 .30 .50 .10 .30 .20 12 .20 0 0 .30 .30 .0 .30 .30 l.B .10 .30 .20 13 .20 0 0 .20 11 2 .30 .20 .30 0 .30 .20 14 .30 0 c .20 1.8 .0 .20 0 0 0 .20 .20 15 .30 0 0 .20 .30 .0 .20 0 .20 0 .20 .20 16 .20 0 0 .30 .30 .1 .10 0 0 .20 .30 0 17 .20 0 0 .30 2.0 .0 0 0 0 0 .20 .20 18 .30 c 1,100 .30 .30 .80 0 .10 0 0 .20 .20 19 .10 577 77 1.0 .30 .70 0 0 0 0 0 .30 20 0 101 0 .30 .30 .50 .10 0 .10 0 0 .30

21 0 2,370 0 .30 .30 .40 .20 0 .10 0 0 .30 22 0 24 0 .30 .30 .30 .30 0 0 0 0 1.0 23 .20 0 0 .30 .30 .20 .30 0 .20 0 0 .30 24 .30 0 0 .30 .30 .10 .40 0 0 0 0 .30 25 .30 0 0 .50 .30 0 .50 .10 0 0 0 .30 26 .30 c 0 3.0 .30 0 .80 .20 0 0 0 .30 27 .30 0 0 34 1.0 0 1.1 .20 0 .20 0 .30 2B .30 .10 0 1.4 1.0 0 1.4 1.4 0 7.2 0 .20 29 .20 0 0 .30 .50 0 1.7 .20 0 .30 0 0 30 .20 158 0 .30 0 2.0 1.8 0 .30 0 0 31 .20 0 21 C 3.6 .20 0 OTAL 5.60 3,233.50 1.163.90 69.00 43.70 4,553 .30 109.10 17.40 14.00 13.40 5.50 7.90 .18 .26 AX .30 2,370 1,100 34 15 4, 300 76 3.6 4.4 7.2 1.0 1.8 IN 0 0 0 0 .30 0 0 0 0 0 0 0 87 9, 030 216 35 27 11 16 ,,450 ,360 LOS ANGELES RIVER BASIN

11102500 RIO HONDO NEAR DOWNEY, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

NGV DEC JAN FEB MAR APR MAY JUN JUL 10 0 0 .30 1.0 2,270 .80 1.4 .40 .40 .80 2 .20 10 0 .30 1.2 317 20 1.4 .60 0 1.0 3 7.1 20 0 .80 1.2 8 .0 117 1.2 .40 .10 .80 4 .30 30 0 .60 1.4 .10 .80 l.G .30 .40 .80 5 .20 C 0 .60 267 10 145 1.4 .40 .30 .80 1 6 .30 0 0 .60 770 .10 7.6 1.2 .60 .40 0 7 .30 0 0 .BO 980 10 1.4 l.C .60 .80 .30 8 .30 0 0 .80 260 .10 1.4 .80 .40 .80 .4C o' 9 .20 0 0 .60 170 .10 9.5 .80 .30 .80 80 10 .30 10 0 .80 933 263 88 .80 .10 .60 .80 0 11 .20 20 8.6 .60 40 2 .0 132 .80 0 .80 .80 12 .30 20 0 .30 117 .10 104 .80 0 1.2 1.0 13 .30 0 0 114 104 10 142 .80 0 .80 .80 0 14 1.4 0 0 114 92 .10 142 .60 0 .60 .80 15 .30 24 .30 1.0 1,240 10 157 .60 0 .60 1.0 16 .20 1 C 14 .40 669 10 157 .80 .10 .60 1.0 0 17 .20 20 .30 1.2 38 10 122 .80 1.0 .10 .80 IB .30 20 0 97 198 10 209 .60 .60 0 .60 19 .20 30 .10 191 385 25 193 .60 .80 0 .80 .10 152 .60 2.6 .80 7.6 0 .80 0 22 .30 0 0 275 1 500 51 3.2 .40 1.2 0 .BO 0 23 .20 10 0 5.8 6 570 30 2.6 1.2 .80 0 .80 0 24 .20 10 0 1 110 B 700 .10 1.8 .80 .80 0 .80 0 25 .30 0 38 23 100 19 10: 10 1.6 .80 .40 0 .60 0 26 .20 0 37 18 000 12 BOO 10 1.4 .60 .60 0 .80 0 27 .30 0 .10 7 620 B 110 20 1.2 .60 .60 0 .1C c 28 .10 0 .40 8 280 8 280 30 1.0 .40 .60 .10 .10 0 29 .10 0 50 1.0 .60 .80 .30 .10 0 30 15 0 70 1.4 .60 0 .40 .30 ,J0 7.6 .2 1.0 1. MIN 0 0 0 .30 1.0 10 .80 .40 0 0 C 21 41

D 970 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN J UL AUG SE 1 .04 .06 .84 .45 .07 664 1.2 1.0 .45 45 .84 2 .04 .06 .84 .06 .06 240 .64 .64 .26 64 .84 !e 1.2 i.q 4 .84 .26 1.2 .04 .07 494 .84 .04 .26 26 1.2 .8 5 .45 .07 .B4 .06 .06 212 .64 .84 .45 04 1.2 6 .26 18 .45 .04 .26 .84 .84 .04 05 .84 .9 7 .07 3 .07 .04 .26 .64 .84 .04 07 .B4 .8 9 .05 .4 .84 28 28 .64 .84 .04 06 .26 10 .07 .8 .26 34 377 .84 .84 .05 26 .26 11 .05 .4 .64 8.7 7.0 .84 .84 .45 26 .64 .6 12 .04 .4 .26 2.0 2.6 .84 1.0 .45 07 .05 .6 .45 .84 .26 07 .06 .6 14 .05 .4 .45 23 :64 .45 .64 26 .07 .6

16 .45 .4 .64 124 .45 .64 .84 .07 . 84 .05 .0 17 .05 .0 IB .45 .4 .64 1.0 .45 .64 .07 .45 05 .04 .0 .0 20 .64 .0 .0 23 .4 24 .6 .84 .84 .64 .8 84 .05 .64 .45 84 .45 IS 25 .4 .84 .64 .07 .8 84 .26 .84 .07 B4 .84 .0 26 .8 .84 .0 27 .4 .84 .06 .45 .8 64 .07 .64 .64 84 1.4 .0 64 .07 .45 .45 84 1.6 .0 30 .05 .64 .04 .05 24 .45 .07 .45 84 1.2 :l

MAX .84 18C 1.2 124 964 664 1.2 1.0 .84 2 .0 1.6 MIN .03 2 CAL YR 1969 TOTAL 154,884.72 MEAN 424 MAX 23,100 MIN 0 AC-FT 307,200 MIN .03 AC-FT 7,240 368 LOS ANGELES RIVER BASIN

11103000 LOS ANGELES RIVER AT LONG BEACH, CALIF. LOCATION.--Lat 33°49'02", long 118°12'20", in Los Cerritos Grant, Los Angeles County, on right bank 5,000 ft

DRAINAGE AREA.--832 sq mi. PERIOD OF RECORD.--December 1928 to September 1970. GAGE.--Water-stage rec is 11.91 ft above svel (levels by Los Angeles County Flood Control District). ory of changes pi ior to J 20, 1956. AVERAGE DISCHARGE.--41 years (1929-705, 166 cfs (120,300 acre -ft per r); median of yearly mean discharge 98 cfs (71,000 acre-ft per year). imums and minimums (discharge in cubic feet per nd, gage height in feet) for the water ye contained in the following table: Mi Date Discharge G.H. Date Discharge 1966 Dec. 29, 1965 61,500 11.71 3.0 1967 Nov. 7, 1966 43,700 9.96 9.9 1968 Mar. 8, 1968 48,900 10.49 Oct. 9 1969 Jan. 25, 1969 102,000 16.00 Dec. 23 1970 Mar. 4, 1970 25,500 7.54 Sept.28 1970 discharge, 102,000 cfs Jan. 25, 1969 (gage height, 16.00 ft); no flow at time in 1929-30, 1934. REMARKS.--Flow regulated since September 1940 by Hansen flood-control reservoir and since December 1941 by Sep- ulveda flood-control reservoir (combined capacity, 49,400 acre-ft) and by several small flood-control reservoirs. City of Los Angeles stores imported Owens River water in San Fernando and Chatsworth reservoirs and at times discharges imported water into Los Angeles River above station. Many diversions above station for domestic use and irrigation. AVERAGE DISCHARGE represents flow to the ocean, regardless of upstream

COOPERATION.--Records furnished by Los Angeles County Flood Control District and reviewed by Geological Survey. DISCHARGE, IH CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY OCT JUN JUL AUG SEP 1 13 8.2 110 1,690 93 29 28 12 IB 22 16 19 2 11 13 99 923 41B 25 20 4 17 18 20 18 3 8.8 12 15 18 20 16 4 10 12 101 961 44 19 18 8 13 12 21 17 5 15 12 50 961 45 40 19 8 12 15 IB 15 6 11 11 40 1,000 2,940 20 24 7 6.0 19 8.2 14 7 13 8.8 31 581 259 14 21 7 3.4 18 8.2 7.7 8 14 9.9 28 385 112 20 21 2 3.0 18 9.4 7.7 9 12 18 1,470 230 52 19 16 1 9 5.2 20 14 4.8 10 8.8 13 1,370 142 47 20 13 25 7.2 14 20 10 11 10 9.9 93 8 45 14 12 6 14 14 20 16 12 14 9.4 681 4 42 ' 7.2 16 0 18 18 18 16 13 15 11 207 2 34 4.4 18 2 18 18 16 16 1* 14 812 481 4 30 12 16 4 22 12 14 15 15 12 2.210 198 9 40 35 17 2 23 8.2 14 16

16 9.9 5,470 72 3 39 20 18 1 28 6.0 18 16 17 B.8 10,600 36 6 43 26 14 4 20 4.4 22 IS 18 9.9 2.050 27 4 40 16 15 8 17 8.2 20 91 19 12 333 19 2 34 13 12 9 14 19 20 270 20 10 266 20 0 25 12 4.8 0 17 20 19 82 21 12 205 22 4 21 14 9.4 7 18 . 20 16 22 22 13 13,800 45 4 25 19 22 4 19 20 16 17 23 12 11,600 36 4 24 20 19 3 21 20 16 21 24 8.8 14,500 27 2 38 175 14 5 23 20 14 20 25 8.8 5.380 18 8 30 742 18 6 21 20 13 17

26 10 1,980 14 7 30 42 20 7 16 22 IB 16 27 11 343 16 8 25 IB 20 B 18 22 16 18 28 12 82 18 3 25 19 20 0 24 21 14 IB 29 11 94 22,500 23 ------25 20 4 21 20 15 29 14 12 22 20 IB 10S 31 9.9 ------2. ISO 312 23 16 19 522.8 sio.a 96S.2 32.2 MAX 15 28 22 22 270 MIN 8.8 8.2 14 22 21 4.4 4.8 11 3.0 4.4 8.2 4.8 AC-FT 700 138,800 65,820 LOS ANGELES RIVER BASIN

11103000 LOS ANGELES RIVER AT LONG BEACH, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

468 ,320 197

14 5,360 12,400 1,473 513 257

12 16 34 58 32 29 28 16 24 48 14 15 21 48 33 49 801 41 26 32 30 24 27 15 12 29 41 30 37 225 36 31 31 35 31 30 16 9.9 31 39 31 38 121 46 42 36 33 30 27 18 16 25 30 42 31 52 1,370 38 30 28 29 24 19 16 24 30 39 28 57 880 43 28 28 27 28 20 16 287 36 37 28 43 121 34 32 27 26 27 21 16 22 14 31 3C 26 24 12 30 31 35 28 27 30 22 25 14 22

27 16 18 25 210 39 31 58 38 30 30 24 41 28 16 24 32 83 36 35 85 38 36 32 23 515

1,126 1,006 875 921 1.944

MIN 9.9 14 2? 23 28 22 2,000 1,740 1,830 3,860 111.800 WTR YR 1967 TOTAL 86,671.9 MEAN 237 MAX 12,400 MIN 9.9 AC-FT 171,900

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

1,310 13,200 327

20 26 42 30 38 50 33 35 21 31 31 24 21 26 41 22 30 30 28 34 26 30 25 29 25 4,760 856 30 43 48 30 29 27 26 25 27

21 3,120 43 28 37 33 29 32 32 21 41 23 ?1 176 48 38

MEAN 25.5 886 196 95.6 91.7 542 81.0 33.8 28.8 29.8 43.0 26.7 MAX 32 13.600 3,410 807 519 13,200 865 52 38 65 320 38 MIN 18 23 34 24 31 23 22 24 21 21 24 20

9,200 5,500 LOS ANGELES RIVER BASIN

11103000 LOS ANGELES RIVER AT LONG BEACH, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 DAY OCT NOV DEC JAN FEB MAR APR HAY JUN JUL AUG SEP

1 26 29 17 24 411 5,920 81 62 50 76 53 36 2 27 25 18 22 346 2,460 85 63 63 81 48 39 3 231 26 22 27 ' 37.2 1,670 781 56 74 79 42 48 4 3? 39 22 25 311 904 118 56 70 81 49 47 5 26 34 24 25 1,970 831 838 105 88 77 45 48 6 22 27 24 26 12 600 1,040 .514 60 88 81 57 50 7 24 25 22 29 4 530 1,380 96 56 94 85 47 40 8 30 24 19 26 10 900 980 105 56 81 83 49 43 9 25 21 20 25 6 130 885 315 54 83 120 49 47 10 25 19 27 27 3 530 1,670 237 52 90 118 45 46 11" 26 20 25C 25 557 640 252 47 85 134 47 46

13 20 19 24 511 790 761 220 58 94 103 49 44 14 87 22 18 2,890 553 424 284 52 85 108 54 40 15 136 492 24 91 3,130 504 333 54 72 129 50 44

17 25 32 83 37 925 514 388 57 154 123 40 46 18 24 26 29 524 1,620 481 284 57 88 123 47 44 19 26 3C 25 4,420 1,450 126 239 50 86 108 50 42 20 23 29 51 12,600 2,210 120 220 56 83 97 45 38 21 20 26 20 12,100 754 2,280 210 53 103 99 54 30 22 28 26 18 2,860 4,520 663 138 77 86 126 44 34 23 26 24 16 406 15,300 482 120 63 92 112 43 38 24 26 2C 18 7,580 15,600 411 89 90 90 81 35 39 25 28 18 850 55,000 40,800 359 64 88 85 68 37 40 26 32 21 835 32,000 21,700 239 63 90 81 52 45 36 27 29 20 87 13,500 12,60C 124 56 94 79 47 41 38 28 30 2C 38 12,400 13,200 92 57 86 76 47 43 34 29 29 18 42 2,220 86 58 79 68 58 45 33 3C 292 18 29 600 74 57 74 70 56 49 43 31 164 27 513 70 56 53 38

MEAN 51.3 44.3 99.0 5,181 6,419 889 233 64.8 84.2 98.3 46.5 41.6 MAX 292 492 850 55,000 40,800 5,920 838 105 154 320 57 50 MIN 20 18 16 22 311 70 56 47 50 47 35 30

CAL YR 1968 TOTAL 35,807 MEAN 97 MAX 13,200 MIN 16 AC-FT 71,020 WTR YR 1969 TOTAL 391,103 MEAN 1,072 MAX 55,000 MIN 16 AC-FT 775,800

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 197J DAY OCT NQV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 41 35 ' 36 37 31 4,490 44 30 28 49 39 31 2 39 32 40 38 36 2,740 34 30 35 34 37 31 3 49 35 36 39 40 168 32 23 40 34 36 30 4 38 36 31 35 41. 2,680 38 30 39 34 45 35 5 30 39 36 37 63 2,410 32 38 36 34 48 30 6 31 2,210 33 33 43 101 34 38 33 35 42 25 7 38 1,980 28 28 57 54 37 45 29 39 45 25 8 40 136 36 28 42 47 34 43 30 39 45 30 9 40 75 68 74 1,120 47 36 39 37 39 53 30 10 40 86 40 1,390 4,010 47 38 30 32 38 36 29 11 34 62 , 38 170 1,000 47 35 25 31 37 47 31 12 39 48 47 385 101 45 30 30 32 34 44 33 13 33 54 31 63 69 42 30 27 42 32 39 28 14 38 37 . 29 170 35 39 50 33 69 38 33 26 15 41 34 30 258 29 37 57 33 42 40 30 31 16 41 32 37 2,310 30 35 37 35 32 36 30 31 17 37 34 36 413 35 35 38 33 31 32 26 30 18 33 34 35 69 33 34 40 35 41 30 31 30 19 30 33 36 37 34 30 45 43 42 25 35 27 20 32 34 32 36 35 33 35 40 36 32 32 23 21 38 37 30 35 33 33 37 40 30 34 30 24 22 41 39 34 37 29 33 37 38 36 34 32 28 23 33 36 36 36 30 42 35 35 40 37 34 25 24 30 38 30 33 40 42 48 31 39 48 30 27 25 30 38 41 45 35 36 45 34 37 40 31 28 26 25 35 39 37 36 37 40 36 37 24 32 24 27 34 36 39 40 32 35 37 35 45 30 33 30 28 35 36 33 38 5,300 31 41 34 30 32 32 22 29 36 31 32 35 29 33 36 32 45 32 27 30 40 28 42 33 30 30 30 39 41 32 30 31 35 34 34 352 29 39 31

TOTAL 1,122 5,42C 1,125 6,053 12,419 13,861 1,139 1,058 1,102 1,115 1,122 851 MEAN 36.2 181 36.3 195 444 447 38.0 34.1 36.7 36.0 36.2 28.4 MAX 49 2,210 68 2,310 5,300 4,490 57 45 69 49 53 35 MIN 25 28 28 28 29 29 30 23 28 24 26 22

CAL YR 1969 TOTAL 392,780 MEAN 1,076 MAX 55,000 MIN 22 AC-FT 779,100 WTR YR 1970 TOTAL 46,387 MEAN 127 MAX 5,300 MIN 22 AC-FT 92,010 BALLONA CREEK BASIN

11103500 BALLONA CREEK NEAR CULVER CITY, CALIF. LOCATION.--Lat 33°59'54", long 118° Boulevard Bridge, 1.7 miles sout of Culver City, and 4.1 miles upstream from mouth. Oct. 24, 1961, to Aug. 10, 1967, at site 500 ft do stream. DRAINAGE AREA.--89.5 sq mi, excludes that of Sepulveda Creek. Prior to January 1951, 111 sq mi, change due to

PERIOD OF RECORD.--February 1928 to September 1970 (after December 1950, flow of Sepulveda Creek excluded). GAGE.--Water-stage recorder. Datum of gage is 11.98 ft (revised) above mean sea level (levels by Los Angeles County Flood Control District). Prior to May 14, 1936, at site 1 mile downstream at different datum. May 14, 1936, to Oct. 23, 1961, at datum 0.72 ft lower and Oct. 24, 1961, to Aug. 10, 1967, at datum 0.92 ft lower, at site 500 ft downstream. AVERAGE DISCHARGE.--22 years (1928-50), 35.2 cfs (25,480 acre-ft per year); 20 yea (1950-70), 43.5 cfs (31,520 acre-ft per year); median of yearly mean discharges, 34 cfs (24,600 acre-ft per sar).

LAlKtMhb. --Maxinlums ana minimums (discnarge in CUD ic teet p nd, gage height in feet) for the water years 1966-70 are c ontained in the following tabl e: Maximum Minimum daily Wtr yr Da Discharge G. H. Date Discharge 1966 No . 22 196S 18,000 all. 49 COct. 10, 1965 5.3 1967 No 7 1966 13,900 alO. 20 /Apr. 9, 1967 6.7 1968 No . 21 1967 32,500 14. 89 Nov. 11, 1967 8.2 1969 Ja . 25 1969 17,000 10. 34 Sept. 5, 1969 8.2 1970 Ma 1970 7,900 6. 82 June 14, 1970 7.6 a Site aiid datum then in use. Peric d of record: Maximum discharge, 32 ,500 cfs Nov. 21, 1967 (gage height, 14.89 ft); no flow at times s ome ye irs. REMARKS. --No regulation above station. City o f Lo s Ang eles at times discharges imported Owens River water from mall pumping diversions above station for irrigation. COOPERATION.--Records furnished by Los Angeles County Flood Control District and reviewed by Geological Survey. REVISIONS (WATER YEARS).--WSP 881: 1938. WSP 1928: Drainage area.

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN -JUL AUG

7.4 14 948 14 61 13 9.5 98 12 7.4 IB 13 5.3 13 32B 16 63 15 7.4 16 15 8.1 17 14 8.1 12 21 17 63 14 16 9.5 12 6.7 16 8.8 B.8 14 243 15 65 14 13 ID 10 9.5 17 13 10 17 35 15 63 13 13 10 18 12 15 15 12 548 71 15 65 17 17 9.5 15 12 13 12 14 647 15 15 35 13 16 12 15 13 18 14

9.5 1,670 15 12 14 17 15 12 16 12 17 14 6.7 2,350 14 15 14 24 13 13 15 13 IB 14 8.8 197 10 17 14 24 13 12 15 16 17 1DO 8.8 22 9.5 22 14 14 15 14 13 17 18 46 12 18 10 17 10 12 15 14 16 17 15 13 12 15 13 10 15 12 13 16 12 15 10 13 14 3.620 21 9.5 14 15 14 9.5 14 14 17 13 13 3BO 12 12 14 14 9.5 13 15 15 1915' 15 10 503 12 10 15 87 9.5 12 12 9.5 14 15 280 B.I 10 14 78 16 12 9.5 17 IB 9.5 15 27 9.5 12 13 10 14 12 8.1 18 19 17 14 19 12 12 10 9.5 14 16 12 15 12 15 15 15 13 13 14 12 12 13 9.5 15 9.5 15 12 16 3,170 15 14 12 15 10 15 16 30 9.5 16 61 818 ...... IB 12 12 12 13 9.5 17 31 7.4 59 18 14 16 12 10

TOTAL 348.3 533.8 MEAN 11.2 350 169 41.1 68.0 19.1 13.5 15.9 13.0 12.7 15.6 17.8 MAX 15 3.620 3,170 818 1,150 87 20 98 IB 18 19 100 HIM 8.8 BALLONA CREEK BASIN

11103500 BALLONA CREEK NEAR CULVER CITY, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

9.5 739 .280

246 875 349 121 9.5

8.1 9.5 454 181 13

27 13 .B 10 20 15 12 13 13 14 15 12 12 28 14 2 12 18 14 15 90 9.5 14 IS 12 220

619 MEAN 13 .1 19 168 MAX 82 875 652 20 18 17 18 220 MIN 8 .8 .1 8.1 8.8 8.8 10

DISCHARGE! IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

9.4 ,460 213

12

888 MEAN 11.9 299 66.8 28.6 22.0 134 24.3 13.8 15.4 15.4 21.1 21.0 MAX 14 6.350 1,460 323 147 2,060 317 20 22 20 63 25 M1N 10 8.2 8.8 11 10 11 11 10 10 11 14 17 946 1,300 1,250 BALLONA CREEK BASIN

11103500 BALLONA CREEK NEAR CULVER CITY, CALIF.--CONTINUED OISCHA

NOV DEC

12

9.4 9.4 698 392 13

18 11 20 12 464 1,810 27 21 13 16 55 52 20 19 12 19 12 2,830 52 27 18 19 16 50 52 21 20 12 20 29 3,240 75 25 16 20 18 50 50 18

21 15 23 11 1,730 344 283 20 16 13 58 48 17 22 14 32 10 216 326 19 19 20 12 58 3 25 23 U 34 12 110 1.660 15 18 20 17 55 8 20 24 15 27 11 1,860 327 18 18 15 16 50 1 20 25 13 19 301 4,840 1,300 20 16 12 16 45 8 19

26 12 17 192 1,150 76 20 14 18 14 60 8 19 27 12 20 15 139 58 20 13 19 13 36 8 20 28 15 17 13 245 384 21 20 18 11 48 5 21 29 39 20 16 20 18 20 12 43 5 32 30 127 18 14 76 17 19 16 34 45 38 34 31 18 14 78 19 14 48

MEAN 23.8 25.4 33.9 592 329 40.9 31.2 17.1 16.1 50.4 45.9 20.8 283 270 20 34 93 53 50 MIN 11 13 8.8 9.4 21 15 13 12 11 36 38 8.2 1,860 1.050 956 3.100 2,820 1,240

DAY OCT NOV DEC JAN FES MAR APR MAY JUN JUL AUG SEP 1 24 13 30 9.4 11 415 8.8 13 11 11 14 12 2 18 13 30 10 12 123 11 11 11 10 13 13

12 12

MEAN 15.8 MAX 36 MIN 9.4 TOPANGA CREEK BASIN

11104000 TOPANGA CREEK NEAR TOPANGA BEACH, CALIF.

LOCATION. --Lat 34°03'S2", long 118°35'10", in Boca de Santa Monica Grant, Los

DRAINAGE AREA.--18.0 sq mi. PERIOD OF RECORD.--January 1930 to September 1938, October 1939 to September 1970. GAGE.--Water-stage recorder. Datum of gage is 265.60 ft above mean sea level (levels by Los Angeles County 400 ft upstream at different datum. AVERAGE DISCHARGE.--39 years, 5.71 cfs (4,140 acre-ft per year);'median of yearly mean discharges, 1.9 cfs (1,400 acre-ft per year). EXTREMES .--Maximu ) for th 1966- 70 are COntained in the followi ng table: Maximum Minimurn daily Wtr yr Date Discharge G.H. Dat e Di s charge 1966 Dec. 29, 1965 3,500 9.49 Oct . 1-6,, Oct. 29 to Nov. 2, 1965 .01 1967 Jan. 24, 1967 3,280 8.02 Oct . 1 to Nov. 6, 19 66 .10 1968 Mar. 8, 1968 567 4.99 Many days .10 1969 Jan. 25, 1969 12,200 13.36 Aug . 22-24, 1969 0 1970 Mar. 4, 1970 844 5.73 Sev eral day 0 rge, 12,200 cfs Jan. 25, 1969 (g age heig ht, 13.36 ded above 3r diversion ab

REVISIONS (WATER YEARS) . -WSP 1635: 1931. WSP 1928: Drainage area. DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTO SER 1965 TO SEPTEM 1ER 1966 DAY OCT JUL AUG SEP 1 .01 .01 8.2 43 7.8 .8 .4 .70 .30 .10 .10 .10 2 .01 .31 6.1 3<> 3.5 .4 .70 .30 .10 .10 .10 3 .01 .02 5.2 2 5.8 .4 .70 .30 .10 .10 .10 4 .01 .02 5.0 2 5.0 .3 .60 .30 .10 .10 .10 $ .01 .02 4.4 19 4.7 .3 .60 .30 .10 .10 .10 6 .01 .02 3.9 16 38 .3 .50 .30 .10 .10 .10 7 .04 .02 3.9 1 15 .3 .70 .20 .10 .10 .10 8 .04 .04 3.6 1 11 .3 .50 .20 .10 .10 .10 9 .04 .04 3.9 It 8.2 .3 .70 .20 .10 .10 .10 10 .04 .04 17 11 7.5 .3 .60 .20 .10 .10 .10 11 .04 .04 6.4 10 6.1 .1 .60 .20 .10 .10 .10 12 .04 .04 6.8 .9 6.1 .0 .50 .20 .10 .1C .10 13 .04 .04 5.0 .8 5.5 .0 .50 .20 .10 .10 .10 14 .04 .50 8.8 .5 5.5 .90 .50 .20 .10 .10 .10 15 .04 2.4 5.8 .4 5.2 .90 .50 .20 .10 .10 .10 16 .04 68 4.4 .5 5.C .80 .40 .20 .10 .10 .10 17 .04 245 3.6 .2 5.0 .90 .40 .20 .20 .10 .10 18 .04 65 3.1 .0 5.0 .8 .90 .40 .20 .10 .10 .10 19 .04 15 2.9 .7 4.7 .8 .90 .40 .20 .10 .10 .10 20 .04 6.1 2.9 .7 4.4 .8 .90 .40 .20 .10 .10 .10 21 .04 2.9 2.9 .2 4.2 .8 . 8C .50 .20 .10 .1C .10 22 .02 491 2.9 .7 3.9 .7 .80 .50 .10 .10 .10 .10 23 .02 203 2.5 .4 3.6 .7 .80 .50 .10 .10 .10 .10 24 .02 179 2.3 .4 3.6 .7 .70 .40 .10 .10 .10 .10 25 .02 87 2.3 .2 3.4 .8 .70 .40 .10 .10 .1C .10 26 .02 41 2.1 .4 3.1 .8 .70 .50 .20 .10 .1C .10 27 .02 23 2.1 .2 2.9 .8 .70 .50 .20 .10 .10 .10 28 .02 17 2.3 .9 2.8 .7 .80 .50 .10 .10 .1C .10 29 .01 13 1,120 .9 ______.5 .70 .40 .10 .10 .10 .10 .01 10 198 4 - .7 .70 .30 .10 .10 .10 .10 31 .01 .5 .30 .10 .10 OTAL .83 1 469.26 1.510.3 368.0 191.5 6 .5 30.00 15.70 5.90 3.20 3.10 3.00 EAN .027 49. C 48.7 11.9 6.84 2 02 1.00 .51 .20 .10 .10 .10 .70 .30 .20 .10 .10 (IN .01 .01 2.1 3.9 2.8 .5 .70 .30 .10 .10 .10 .10 C-FT 1.7 2,910 3,000 730 380 24 60 31 12 6.4 6.2 6.0 r 6,760 TOPANGA CREEK BASIN

11104000 TOPANGA CREEK NEAR TOPANGA BEACH. CALIF.--CONTINUED

DAY QCT NOV UN JUL AUG SEP 1 .10 .10 .20 .0 1 2.5 12 6.1 G .80 .30 .20 2 .10 .10 .6 .0 1 2.5 8.9 5.8 8 .80 .30 .20 3 .10 .10 9 .0 .2 2.5 .2 5.5 .70 .30 .20 4 .10 .10 .1 .0 .2 2.6 .5 5.0 .70 .33 .20 5 .10 .1C 5 0 .8 2.3 .8 5.0 .70 .30 .2C

6 .10 .'1C 27 1.0 .8 2.1 .2 4.7 .70 .30 .20 7 .10 59 5 .90 .4 2.3 .5 4.2 .70 .30 .20 8 .10 2.0 1 .90 .8 2.0 .7 3.9 .70 .30 .20 9 .10 .40 1 .90 .5 2.0 .9 3.9 .60 .30 .20 10 .10 .20 .5 .90 .0 2.0 .6 3.9 .50 .35 .20 11 .10 .20 .90 .7 4.2 3 3.6 .50 .30 .20 12 .10 .20 1.0 .4 30 1 3.6 .50 .30 .20 13 .10 .20 .90 .2 31 .8 3.1 .50 .30 .20 14 .10 .20 .90 .2 12 .8 2.9 .50 .30 .20 15 .10 .20 .90 .9 7.5 .2 2.8 .50 .30 .20 16 .10 .20 1.0 .9 5.8 .7 2.8 .40 .20 .20 17 .10 .20 1.0 .6 5.2 .4 2.6 .40 .20 .20 IB .10 .2C .90 .4 4.4 2 2.6 .40 .2J~.20 .20 19 .10 .20 .90 .4 4.2 1 2.6 .40 .20 20 .10 .30 .90 .1 3.9 .9 2.6 .30 .20 .20

21 10 .50 - .90 .9 3.6 1 2.6 .30 .20 .20 22 .10 .30 220. .9 2.9 2 2.1 .30 .20 .20 23 .10 .30 6 .8 3.1 1 2.1 .30 .20 .20 2* .10 .30 56 .8 2.9 2 2.0 .30 .20 .20 25 .10 .30 11 .4 2.8 1 2.0 .20 .20 .20 26 .10 .20 4 .9 2.8 1 2.1 0 .20 .20 .20 27 .10 .2C 2 .8 2.6 .5 2.1 0 .20 .20 .20 28 .10 .20 2 .6 2.6 1 2.1 0 .20 .20 .30 29 .10 .20 2.6 .2 2.0 0 .20 .20 .2C 30 .10 .20 2.5 .8 2.0 0 .30 .20 .20 31 .10 TOTAL PEAN .10 2.23 18.3 36.3 4.95 5.50 10.6 3.24 1.27 .45 .25 .20 MAX .10 6.1 2.0 .80 .30 .30 WIN .10 .10 .20 .90 2.6 2.0 3.6 2.0 .90 .20 .20 .20 28 15 12

620

DISCHARGE! IN CUBIC FEET PER SECOND , MATER YEAR OCTOB ER 1967 TO S PTEM ER 1968 DAY OCT NOV JUN JUL AUG SEP

1 .20 .20 4 .7 1.0 1.0 .70 13 .70 30 .20 .20 .20 2 .20 .20 2 .20 .10 3 .20 .20 1 .7 .90 .90 .70 2.0 .70 .40 .20 .20 .10 4 .30 .20 1 .5 .90 .80 .70 1.8 .70 .40 .20 .20 .20 5

6 .20 .20 1 .4 .90 .80 .70 1.4 .70 .40 .20 .20 .20 7 .20 .20 1 .8 .90 .80 4 1.3 .70 .50 .20 .40 .20 a .20 .20 1 .3 .90 .80 18 1.2 .60 .40 .20 .30 .20 9 .20 .20 1 .1 .90 1.2 1 1.0 .50 .40 .20 .30 .10 10 .20 .20 .90 1.0 1.0 .2 .90 .60 .30 .20 .30 .10 11 .20 .20 .90 1.3 .90 .90 .70 .30 .20 .20 .10 12 .20 .20 .90 .90 .90 .90 .60 .30 .20 .20 .10 13 .20 .20 .80 .70 1.8 .90 .50 .30 .20 .20 .10 14 .20 .20 .80 .70 1.0 .90 .50 .30 .20 .20 .10 15 .20 .20 .80 .80 .90 .90 .40 .30 .20 .20 .10

16 .20 .20 .80 .80 .80 .90 .40 .30 .20 . 20 .10 17 .10 .20 .80 .80 1.9 .90 .40 .30 .20 .20 .10 IB .10 .20 4 .70 1.2 .90 .40 .30 .20 .20 .10 19 .10 15 1 .70 1.0 .90 .40 .30 .20 .20 .10 20 .10 18

21 .10 112 .4 .70 .90 .90 .50 .20 .20 .10 .10 22 .20 .20 .1C .10 23 .20 4.7 .1 .70 .90 .70 .50 .20 .20 .10 .10 24 .10 .10 25 .20 1.3 .8 .80 .90 .70 .40 .30 .20 .10 .10 26 .20 .90 .5 .80 .80 .70 .40 .30 .20 .1C .10 27 .20 .80 .3 5.6 .80 .80 .30 .30 .20 .10 .10 2B .10 .10 29 .10 .10 30 .20 25 . 1 .90 .70 .30 .30 .20 .10 .10 31 .20

MEAN .19 7.96 3.19 1.09 .97 9.75 1.52 .51 .31 .20 .18 .12 MAX .30 112 41 5.6 1.9 186 13 .70 .50 .20 .40 .20 MIN .10 .20 .80 .70 .80 .70 .70 .30 .20 .20 .10 .10 AC-FT 12 474 196 67 56 600 90 31 19 12 11 7.1 480 580 TOPANGA CREEK BASIN

11104000 TOPANGA CREEK NEAR TOPANGA BEACH, CALIF.--CONTINUED

DAY

1 .20 .20 .20 .40 29 86 8.4 3.2 2.0 1.0 .80 .80 2 3.2 2.4 1.0 .80 .60 3 .20 .20 .20 .40 23 51 8.4 3.2 2.0 1.0 .BO .60 4 .20 .20 .20 .50 21 40 6.0 3.6 2.0 1.0 1.0 .40 5 .20 .20 .20 .40 238 32 21 3.2 2.0 1.0 1.2 .40 6 11 3.6 2.0 1.4 1.0 .40 7 .20 .20 .20 .30 B2 27 7.2 3.6 2.0 1.6 .60 .40 8 .20 .10 .20 .30 45 24 6.6 3.2 2.0 1.4 .60 .40 9 .20 .10 .20 .30 34 24 6.6 2.0 1.8 1.2 .60 .40 10 .20 .20 .20 .30 27 2B 6.6 2.0 1.6 1.2 .60 .40

11 .20 .10 .3C .30 24 26 6.0 l.B l.B 1.6 .60 .40 12 .20 .10 6.0 1.6 1.6 1.6 .60 .40 13 .20 .10 .20 1.4 19 20 6.0 1.4 1.4 1.2 .6C .40 14 .30 .1C .20 12 16 17 6.0 1.2 1.6 1.0 .20 .60 15 .20 .20 .20 .50 59 16 5.6 1.2 1.6 .80 .60 .60 16 .20 .20 .20 .60 29 16 5.6 1.2 l.B .80 .60 .60 17 .20 .20 .20 .50 16 16 5.6 1.2 2.0 1.0 .40 .60 IB .20 .20 .20 1.4 19 15 6.0 1.4 2.0 .60 .60 .60 19 .20 .20 .20 271 17 14 5.2 1.6 1.8 .40 .60 .60 20 .20 .20 .20 365 10 14 4.B 1.8 1.6 .BO .40 .60

21 .20 .10 .20 721 27 16 4.4 2.0 l.B .80 .20 .60 22 .10 .10 .20 132 52 11 4.8 2.4 l.B 1.0 0 .60 23 .10 .20 .20 36 1,45: 10 4.4 2.4 1.6 1.0 0 .60 24 .10 .20 20 273 491 11 4.0 2.4 1.6 .BO 0 .60 25 .20 .20 l.B 4,920 1.1BO 11 4.0 2.4 2.B .80 .40 .60 26 .20 .20 .90 1,370 185 11 3.2 2.4 1.4 .80 .40 .60 27 .20 .20 .50 1 7 111 9.6 2.8 2.0 1.2 .BO .40 .60 28 .20 .20 .40 6 125 7.B 2.B 2.0 1.4 1.0 .40 .60 29 .20 .20 .40 2 - 8.4 3.2 l.B 1.4 1.0 .40 .40 30 .30 .20 .40 2 B.4 3.2 l.B 1.2 1.0 .60 .40 31 .30 .40 6 B.4 l.B .80 .60 TOTAL 15. BO MEAN .20 .17 .31 274 IBS 22.4 6.13 2.21 1.77 1.01 .54 .53 MAX B6 21 3.6 2.B 1.6 1.2 .BO MIN .10 .1C .20 .30 10 7.8 2.B 1.2 1.2 .40 0 .40 AC-FT 12 10

36 MIN .10 AC-FT 936

DISCHARGE , IN CUBIC FEET PER SECOND, WATER YEAR OCTO iER 1969 TO SEPTEM8 ER 1970 DAY JUN JUL AUG SEP

1 .40 .20 .40 1.0 .60 37 .60 .40 .60 .20 0 .20 2 .40 .20 .60 1.0 .60 13 .40 .40 .60 0 0 .20 3 .40 .20 .60 1.0 .60 3.6 .40 .40 .40 0 0 .40 4 .40 .20 .60 .BC .4C 84 .40 .40 .40 0 0 .40 5 .20 .20 .BO .60 .60 34 .40 .40 .40 .20 0 .20 6 .20 7 .20 6.9 .BC .60 .60 3.2 .60 .20 .20 .20 .20 .20 8 .20 .60 .BO .60 .60 2.8 .60 .20 .20 .20 .20 .20 9 .40 .60 .80 2.0 B.3 2.4 .80 .40 .20 .20 0 .20 10 .40 .80 .BC 6.5 23 2.4 .60 .40 .20 .20 .20 .20 11 .40 .BO .BO 1.4 .1 2.0 .60 .40 .20 .20 .40 .20 12 .40 .80 .80 1.6 .8 1.8 .60 .40 .20 .40 0 .20 13 .20 .80 .BO .60 .4 1.6 .60 .40 .20 .20 0 .40 14 .20 .80 .80 .40 .4 1.4 .40 .40 .40 0 0 .20 15 .40 1.0 .60 .40 .2 1.2 .60 .40 .40 0 0 .20

16 .40 l.C .60 4.B .2 1.0 .60 .20 .40 0 0 .20 17 .40 1.0 .60 2.0 .2 2.3 .60 .20 .40 .20 0 .20 18 .40 .60 .60 1.2 .0 1.0 .60 0 .40 0 0 0 19 .60 .60 .80 1.0 .BO .60 .80 0 .20 0 0 0 20 .60 .60 .80 1.2 .80 .60 .80 \ .20 .20 0 .20 0 21 .40 .80 .80 1.2 .BO .60 .60 0 .40 .20 .20 .20 22 .40 1.0 .BO 1.0 .80 .BO .60 0 .40 .20 0 .20 23 .40 1.0 .60 1.0 .80 .80 .40 0 .20 .20 .20 0 24 .40 .60 .60 1.2 .BO .80 .40 .20 .20 .20 .20 .20 25 .60 .60 .60 1.0 .BO 1.0 .60 .40 0 .20 .20 .20 26 .60 .60 .60 1.2 .BO 1.2 .60 .40 0 .20 .20 0 27 .40 .40 .60 1.2 .80 1.2 .60 .40 0 .20 .20 0 28 .60 .40 .60 1.0 30 1.0 .60 .40 0 .20 .20 0 29 .60 .20 .80 .80 1.0 .60 .40 .20 .20 .20 .20 30 .60 .40 .BO .80 ______1.0 .60 .40 .20 .20 .20 .40 31 .40 .80 .BO .80 .60 0 .20 TOTAL 12.60 30.20 21.80 40.50 87.40 214.50 17.20 9.40 B.20 4.40 3.40 5.40 .11 MAX .60 6.9 .80 6.5 30 B4 .BO .60 .60 .40 .40 .40 MIN .20 .20 .40 .40 .40 .60 .40 0 0 0 0 0 AC-FT 25 60 43 BO 173 425 34 19 16 B.7 6.7 11 MALIBU CREEK BASIN

11105500 MALIBU CREEK AT CRATER CAMP, NEAR CALABASAS, CALIF. LOCATION.--Lat 34°04'40", long 118°42'03", in Sift; sec.18, T.I S., R.17 W., Los Angeles County, on right bank 700 ft downstream from Cold Creek, 0.2 mile downstream from Crater Camp, and 6 miles southwest of Calabasas. DRAINAGE AREA.--105 sq mi. PERIOD OF RECORD.--January 1931 to September 1970. GAGE.--Water-stage recorder. Datum of gage is 432.82 ft above mean sea level (levels by Los Angeles County Flood

AVERAGE DISCHARGE.--39 years, 21.9 cfs (15,870 acre-ft per year); median of yearly mean discharges, 6.4 cfs (4,600 acre-ft per year). EXTREMES.--Ma ing table Mi daily Wtr yr Date Discharge G.H. 1966 29, 1965 20,600 17.27 1-6, 1965 1967 24, 1967 10,200 12.40 3, 4, 6-10, 17, 18, 1966 1968 1968 3,830 9.31 y 23, 30, Aug. 28, 29, 1968 1969 1969 33,800 21.43 1, 2, 1968 1970 Mar. 4, 1970 1,150 5.65 Aug. 27, 1970 Period of record: Maximum di rge, 33,800 cfs Jan. 25, 1969 (gage height, 21.43 ft), from rating xtended above 6,000 cfs on basi slope-area measurements at gage heights 17.27 and 21.43 ft; no flo imes in some years. REMARKS.--Flo tic use. COOPERATION.--Records furnished by Los Angeles County Flood Control District and reviewed by Geol REVISIONS (WATER YEARS).--WSP 1315-B: 1931(M). WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FE8 MAR APR MAY JUN JUL .2 2 .06 .20 36 168 46 21 10 .0 3 .06 .20 32 135 39 20 10 .0 4 .06 .20 28 115 35 18 9. .0 $ .06 .20 25 100 33 18 8. 5 .0 6 .06 .20 24 95 94 18 8. .0 7 .20 .20 21 84 76 18 8. .0 .0 9 .20 .20 19 70 50 16 8. .0 10 .20 .20 29 63 46 16 8. .0 11 .20 .20 21 58 39 16 8. .0 2 .20 .20 23 53 36 16 6. .0 3 .20 .20 23 47 35 15 4. .0 4 .20 .40 39 44 34 15 4. .0 .0

6 .20 1 23 38 31 14 6. .0 .90 7 .20 1,4 20 35 31 14 6. .0 .90 8 .20 2 18 34 31 11 6. .0 .90 9 .20 17 33 29 10 5. .1 1.1 0 .20 16 32 20 11 5. .2 1.1

1 .20 16 30 29 10 4. .2 1.0 2 .20 1,2 15 29 26 10 4. .2 .90 3 .20 8 14 29 25 9.2 4. .2 .80 4 .20 9 13 26 25 10 5. .1 .80 * .20 4 12 21 25 10 6. .0 .90

6 .20 1 12 24 24 10 5. .0 .90 7 .20 1 12 23 22 10 6. .0 1.0 8 .20 6 15 23 22 10 5. .0 1.0 9 .20 B 7,060 22 10 4. .0 l.C 0 .20 7 963 182 11 4. .0 1.0 1 .20 416 67 11 .90 .10 2 AN .17 195 292 65.8 37.6 13.9 6.7 3 S 2 5 1 3 .04 X .20 1 1.2 N .06 .20 12 21 72 9.2 4.(> .90 58 1 5 31 64

WTR YR 1966 TOTAL 18,918.06 MEAN 51.8 MAX 7,060 AC-FT 37,520 MALIBU CREEK BASIN

11105500 MALIBU CREEK AT CRATER CAMP, NEAR CALABASAS, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YFAR OCTOBER 1966 TO SEPTEMBER 1967

1 1.0 1.4 1.9 11 61 13 23 39 5.6 3.4 2.1 1.6 2 1.0 1.4 6.? 7.8 51 12 38 24 5.4 3.6 2.1 1.6 3 .90 1.4 231 8.5 48 12 27 15 5.0 3.4 2.0 1.7 4 .90 1.7 4? 12 46 12 ?1 15 5.0 3.2 2.1 1.7 5 l.C 1.7 138 8.5 37 12 22 15 5.0 3.1 2.3 1.7 6 .90 2.7 1, 710 8.5 38 11 12 15 5.6 2.6 2.3 1.7 7 .90 373 648 8.9 37 11 15 14 4.3 2.4 2.1 1.7 a .90 34 156 7.8 30 11 14 13 .1 2.8 2.1 1.6 9 .90 1 J 87 7.2 33 11 11 12 .8 2.9 2.3 1.4 1C .90 4.6 63 6.7 30 10 12 15 .7 2.9 2.0 1.4 11 1. 3.4 9 8.2 30 15 58 17 .7 2.8 .8 1.3 12 1 3.2 8 7.8 23 42 30 18 .7 2.9 .8 1.3 13 1 2.7 4 7.0 33 108 20 15 .9 2.8 .7 1.2 14 1 2.4 0 6.7 25 60 19 8.9 .1 2.8 .8 1.4 15 1 1.9 6 6.3 24 39 19 7.8 .9 2.6 .8 1.7

16 1 1.7 23 5.6 22 32 17 15 .8 2.4 .8 1.7 17 0 1.9 19 6.3 22 29 16 19 .8 2.4 .8 1.7 18 0 1.7 16 5.9 22 24 3 14 .9 2.3 .7 1.4 19 1 1.7 15 4.8 19 22 5 7.4 .9 2.6 .7 1.3 20 1. 2.7 17 4.8 22 19 4 8.5 .8 2.4 1.7 1.2 21 1. 3.2 14 5.4 18 17 5 7.8 .8 2.0 2.0 1.2 22 1. 2.4 12 659 15 17 8 7.8 .9 2.3 2.C 1.3 23 1 2.4 12 306 15 16 6 6.7 .8 2.3 2.0 1.3 24 1 1.9 14 2,710 11 19 232 6.7 .4 2.4 1.8 1.4 25 1. 1.7 11 845 18 15 182 6.3 .2 2.3 1.8 2.0

26 1 1.9 11 294 19 12 116 5.4 .8 2.4 1.6 1.7 27 1 1.9 10 159 16 13 48 5.4 .6 2.3 1.7 1.4 28 1 1.7 8.9 106 14 11 46 5.4 .9 2.0 1.8 1.8 29 1 1.9 9.3 46 5.6 .1 2.1 1.7 2.1 3J 1 1.9 7.4 74 8.5 41 6.1 .2 2.1 1.6 2.3 31 1. 10 68 16 5.6 2.1 1.3

MEAN 1.14 15.9 112 176 27.8 21.3 47.0 12.1 4.09 2.60 1.88 1.56 MAX 1.7 3.6 2.3 2.3 MIN .90 1.4 1.9 4.8 11 8.5 H 5.4 2.6 2.0 1.3 1.2

MIN .90 AC-FT 25,730

DISCHARGE , IN CUBIC FEET PER SECOND , MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

11105500 MALIBU CREEK AT CRATER CAMP, NEAR CALABASAS, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

1 2. 1 2.4 A. 6 121 69 AA 23 12 .4 4.0 2 2. 3 1.7 3.8 1C2 64 46 21 12 3.0 4.4 3 2. .1 5.1 1 4 1. 3 2.0 4.0 77 94 49 21 11 .4 4.2 2 5 1. 6 .a i. r 1.7 2.9 1,100 49 74 18 9.6 .8 4.6 7 .a i. 3 1.7 2.9 371 33 50 18 11 .6 4.4 a .a i. 1.8 2.9 247 17 40 16 10 .5 4.0 9 .a i. 1.8 3.1 192 04 37 15 9.3 .1 4.2 10 .0 2. 2.1 3.3 156 17 35 15 9.3 .8 4.2 11 .1 2. 2.9 3.3 139 09 29 15 9.9 .1 4.2 12 .0 2. 2.1 3.3 125 00 39 14 9.0 .1 4.0 13 .6 2. 2.1 3.3 109 96 34 15 9.6 .1 4.7 14 .a i. 2.9 13 100 86 30 14 9.6 .4 4.0 15 .8 2. 3.4 8.6 12A 80 30 14 9.9 .4 4.0 16 .0 2. 3.2 5.1 121 74 29 14 11 .1 4.0 17 .7 2. 3.1 4.4 91 72 27 14 11 .6 4.0 18 .7 2. 2.9 5.1 91 66 26 14 9.6 .4 4.? 19 .7 2. 3.1 466 78 66 28 14 lu .6 3.8 20 .7 2. 3.1 1,970 69 63 27 14 9.9 .1 3.3 21 .6 2. Z.9 3,110 75 66 25 15 9.6 .1 3.3 22 .6 2. 2.9. 516 193 63 26 15 9.3 .4 3.6 23 .6 2. 2.8 173 2,110 60 26 14 9.9 .6 3.3 2* .8 2. 2.8 93* 1,250 36 25 14 9.0 .6 3.6 25 .7 2. 41 24 14 9.3 .4 3.1

26 .a 2. 4.5 9,010 770 46 24 13 9.3 .1 3.3 27 .8 2. 3.4 834 491 46 23 13 8.0 .4 3.6 26 .1 1. 3.2 355 426 46 22 13 8.0 .4 3.6 29 3 1 3.6 250 44 21 12 8.6 ,1 4.2 30 9 1 3.6 189 43 22 12 7.1 31 3.8 137 43 n ______.8 3.8

MEAN 1 MAX .9 2. 69 74 23 12 .0 5.1 MIN .4 1. 1.7 2.9 69 36 21 11 7.1 .6 3.1 2 AC -FT 16 11 169 83,750 24,880 6, 80 2,040 944 581 67 244 3

MIN 1.4 AC-FT 119,900

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

.1 .3 4.0 4.8 6.6 368 4.6 3.8 .8 2. 1.1 1.9 .6 .3 4.6 5.1 5.8 212 21 2.9 .6 2. 1.2 2.3 .4 .4 4.4 5.8 5.6 80 10 3.6 .8 2. 2.3 1.9 .4 .4 4.4 6.1 5.6 182 8.0 4.0 .2 2. 1.7 1.7 .1 .4 4.4 5.4 4.2 351 7.4 4.8 .6 1. 2.2 2.5 .5 .5 4.6 4.0 5.1 107 6.6 4.0 .4 1. 2.2 4.0 .2 .5 4.8 4.6 6.1 61 6.4 4.4 .3 1. 2.5 2.7 .2 .5 4.8 4.6 6.6 44 6.1 5.1 .6 2. 3.1 2.3 .6 .5 4.8 6.8 19 36 6.1 4.6 .8 2. 3.1 1.5 .1 .6 5.1 12 31 30 5.1 4.8 .1 2. 3.3 1.7 .1 .6 5.1 6.8 52 25 4.2 5.1 .8 2. 3.3 1.5 .4 .6 4.6 6.8 47 19 4.2 4.8 .0 2. 3.6 1.7 .6 .6 4.2 5.4 47 18 4.6 4.0 .0 1. 1.7 .7 .4 .6 4.4 5. ft 37 17 5.6 4.8 .0 2. 3.1 1.1 .6 .4 4.4 5.4 11 16 5.8 3.6 .6 2. 3.3 6.4 .1 .6 4.4 11 6.6 16 5.8 3.8 .8 '2. 3.1 25 .6 .6 4.4 6.0 8.3 13 5.4 3.6 .6 2. 3.1 8.3 .4 .1 4.6 6.8 7.1 11 5.1 4.4 .3 2. 2.7 5.8 .6 .0 4.6 6.4 4.8 11 4.8 4.4 .7 2. 1.2 4.6 .6 .6 4.6 6.4 53 11 4.8 A. 4 .6 2. 2.0 5.1 .4 ' ID .8 ! .1 4.2 b'.B e'.3 9.6 5.4 3.1 .3 2.1 1.9 4.8 .3 ' .8 4.4 6.6 7.7 35 5.4 3.3 .7 2.' 1.2 2.7 .0 < .6 4.4 6.6 7.4 15 4.6 3.8 .5 2.1 1.1 1.9

4.4 4.4 5.8 139

MEAN MAX 6.8 5.1 12 139 5.1 4.6 3.3 3.6 MIN 1.4 .51 254 201 142 130

CAL YR 1969 TOTAL 60,701.10 MEAN 166 MAX 24,200 CALLEGUAS CREEK BASIN

11105850 ARROYO SIMI NEAR SIMI, CALIF. LOCATION.--Lat 34°16'41", long 118°47'43", on line between sees.7 and 8, T.2 N., R.18 W., Ventura County, on dow

DRAINAGE AREA.- -70.6 sq mi.

1970 (monthly discharge for October 1933 to September 1951, October 1952 to September 1968) gage is Control Dist rict).

EXTREMES. --Maximum discharges, i n cubic feet pe d and gage height in feet, for the water years 1934-70 are

Utr yr Date Disch. G.H. Wtr yr Dat Dis ch. G.H. 270 1952 Mar . 15, 1952 3, 000 935 Jan. 5 , 1935 46 1953 (a) 936 (a) - 1954 Jan . 19, 1954 740 937 Feb. 14 , 1937 255 1955 Jan . 18, 1955 540 .80 938 Mar. 2 , 1938 1,700 1956 Jan . 26, 1956 760 .60 939 Dec. 18 , 1938 24 4.81 1957 Feb . 28, 1957 174 .28 940 Feb. 3 , 1940 10 1958 Apr . 3, 1958 1, 480 .50 941 Mar . 4 , 1941 1,340 _ 1959 Jan . 6, 1959 34 .60 942 (a ) 1960 Feb . 1, 1960 14 .47 943 Mar. 3 , 1943 1,070 1961 Ca) - 944 Feb. 22 , 1944 3,000 - 1962 Feb . 11, 1962 2, 400 .80 1945 Feb. 2 , 1945 74 1963 Mar . 16, 1963 275 .16 1946 Dec. 21 , 1945 96 1964 Apr . 1, 1964 528 .58 1947 Nov. 13 , 1946 1,000 - 1965 Apr . 8, 1965 455 .56 1948 (a ) 1966 Nov . 17, 1965 3, 890 .23 1949 (a ) 1967 Nov . 7, 1966 2, 040 .80 1950 (a ) 1968 Nov . 20, 1967 4, 900 .66 1951 (a ) 1969 Feb . 25, 1969 6, 330 b5.7 1970 Mar . 2, 1970 750 1.71 a No flow for entire year. b From floodmark.

No fl ow for each ye Pe riod of record: Maximu m disch arge, 6, 330 cfs Feb. 25, 1969 (ga ge height, 5 .7 ft, from f loodmar k); no flow for mos t of time in each year.

COOPERATION. --Records furnished by Ven tura County Flo od Control Distric t and review ed by Geolo gical Sur vey. MONTHLY AND YEARLY DISCHARGES, IN ACRE-FEET, WATER YEARS 1934-51 , 1953-68

WTR YR QCT NOV DEC JAN FEE MAR APR MAY JUN JUL AU6 SEP ANNUAL 1934 0 0 44 70 27 0 0 0 0 0 0 0 141 1935 0 0 0 16 3.0 7.1 12 1.0 0 0 0 0 40 1936 0 0 0 0 0 0 0 0 0 0 0 0 0 1937 0 0 0 0 464 82 0 0 0 0 0 0 546 1938 0 0 0 0 1.8 1,580 0 0 0 0 0 0 1,580 1939 0 0 27 2.2 .8 .8 0 0 0 0 0 0 30 1940 0 0 0 0 6.8 0 0 0 0 0 0 0 6.8 1941 0 0 0 1.6 3,010 3,520 632 0 0 0 0 0 7,170 1942 0 0 0 0 0 0 0 0 0 0 0 0 0 1943 0 0 0 727 116 2,100 4.7 0 0 0 0 0 2,950 1944 0 0 70 0 3,260 839 .9 .3 0 0 0 0 4,170 1945 0 6.0 0 0 16 14 0 0 0 0 0 0 37 1946 0 0 53 0 0 1.2 0 0 0 0 0 0 55 1947 0 261 16 0 0 0 0 0 0 0 0 0 277 1948 0 0 0 0 0 0 0 0 0 0 0 0 0 1949 0 0 0 0 0 0 0 0 0 0 0 0 0 1950 0 0 0 0 0 0 0 0 0 0 0 0 0 1951 0 0 0 0 0 0 0 0 0 0 0 0 0 1953 0 0 0 0 0 0 0 0 0 0 0 0 0 1954 0 3.8 0 206 97 is 0 0 0 0 0 0 326 1955 0 0 0 151 0 0 19 8.1 0 0 0 0 178

1956 0 0 0 298 0 0 0 0 0 0 0 0 298 1957 0 0 0 4.4 44 14 0 0 0 0 0 0 62 1958 0 0 102 35 1,080 450 2,770 0 0 0 0 0 4,440 1959 0 0 0 4.0- 20 0 0 0 0 0 0 0 24 1960 0 0 0 0 1.6 0 0 0 0 0 0 0 1.6 1961 0 0 0 0 0 0 0 0 0 0 0 0 0 1962 0 50 54 65 4,660 17 0 0 0 0 0 0 4,850 1963 0 0 0 .8 123 107 28 0 0 0 0 5.7 310 1964 0 17 0 119 1.0 71 151 0 0 0 0 0 359 1965 0 0 55 7.3 5.2 56 815 0 0 0 .6 0 940 1966 0 3 ,480 2,190 152 0 0 0 0 0 0 0 0 5,830 1967 0 687 1,910 581 0 137 282 0 0 0 0 0 3,600 1968 0 3 ,680 272 6.1 4.0 990 0 0 0 0 0 0 4,950 CALLEGUAS CREEK BASIN

11105850 ARROYO SIMI NEAR SIMI, CALIF.--CONTINUED

IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

.10 4.7 1.0

4.0 3.0 2.0 1.0 8.0

5.0 I.110 383 640 ,680 1,290

.90

TOTAL MEAN 0 .20 .54 124 129 2.90 .68 MAX 0 6.0 9.4 1,680 1,290 20 13 MIN 0 0 0 0 0 .10 0 AC-FT 3 12 33 7,600 7,170 178 40

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

NOV DEC JAN FEE MAR APR MAY JUN JUL 0 00 120 0 0 D 84 0 0 0 .32 0 0 0 66

31 0 0

TOTAL 0 35.6 0 41.67 290.4 282.09 MEAN 0 1.19 0 1.34 10.4 9.10 MAX 0 32 0 36 167 120 MIN 000000 AC-FT 0 71 0 83 576 560 CALLEGUAS CREEK BASIN

11106550 CALLEGUAS CREEK AT CAMARILLO STATE HOSPITAL, CALIF.

LOCATION.--!

DRAINAGE AREA.--248 sq mi.

PERIOD OF RECORD.--October 1968 to September 1970.

GAGE.--Water-stage recorder. Datum of gage is 58:42.ft above mean sea level (levels by Ventura County Flood Con­ trol District).

EXTREMES.--Maxiraums and rainirauras (discharge in cubic fe 1969-70 are contained in the following table:

Wtr yr Date Discharge G.H. Date 1969 Feb. 25, 1969 16,300 8.50 Jan. 6, 1969 1970 Mar. 4, 1970 1,750 3.66 Many days

charge, 16,300 cfs Feb. 25, 1969 (gage height, 8.50 ft); no flow at ti

DISCHARGE, IN CUBIC FEET PER SECOND, WATER VtAR OCTOBER 1968 TO SEPTEMBER 1969

1 1.7 3. 2.5 2.1 2 C 6.5 2.5 2.5 2.5 2.5 2.5 ? 1.7 3. 2.1 2.5 0 8 6.0 2.5 2.5 2.5 2.5 2.5 3 1.7 4. 1.7 .90 7 2 5.5 2.5 2.5 2.5 2.5 2.5 4 1.7 4. 2.5 .80 6 B 5.0 2.5 2.5 2.5 2.5 2.5 5 1.7 4. 2.1 .60 6 4 13 2.5 2.5 2.5 2.5 2.5

6 1.7 3. 2.9 .50 6 5 6.0 2.5 2.5 2.5 2.5 2.5 7 1.7 2. 3.4 .80 3 4.5 2.5 2.5 2.5 2.5 2.5 8 1.7 2. 3.4 1.3 3 4.0 2.5 2.5 2.5 2.5 2.5 9 1.7 2. ?.5 1.7 2 3.5 2.5 2.5 2.5 2.5 2.5 1J 1.7 1. 3.4 1.7 1 3.0 2.5 2.5 2.5 2.5 2.5

1 4.6 C 3.8 1.3 1 2.5 2.5 2.5 2.5 2.5 2.5 2 4.2 C 2.1 .70 1 2.5 2.5" 2.5 2.5 2.5 2.5 3 4.6 1. 1.3 .80 2 2.5 2.5 2.5 2.5 2.5 2.5 4 4.6 1. 1.3 56 3 2.5 2.5 2.5 2.5 2.5 2.5 5 4.2 3. .90 14 0 2.5 2.5 2.5 2.5 2.5 2.5

6 4.2 7. 2.5 3.; 9.C 2.5 2.5 2.5 2.5 2.5 2.5 7 3.8 2. 2.5 2.5 0 2.5 2.5 2.5 2.5 2.5 2.5 8 3.8 3. 1.7 6.4 4 2.5 2.5 2.5 2.5 2.5 2.5 9 4.2 2. 2.5 779 6 2.5 2.5 2.5 2.5 2.5 2.5 0 4.6 1. 2.9 1,150 7 2.5 2.5 2.5 2.5 2.5 2.5

I 4.6 iC 3.4 1,450 6 2 2.5 2.5 2.5 2.5 2.5 2.5 2 4.6 C 2.5 65 1 1 2.5 2.5 2.5 2.5 2.5 2.5 3 4.2 ro 2.5 17 2,6 f) 1 2.5 2.5 2.5 2.5 2.5 2.5 4 4.2 .! C 1.7 879 1,2 ) 0 2.5 2.5 2.5 2.5 2.5 2.5 0 2.5 2.5 2.5 2.5 2.5 2.5

6 3.8 2. 7.4 1,600 5 8 9.5 2.5 2.5 2.5 2.5 2.5 2.5 7 3.8 2.< 11 153 2()0 9.0 2.5 2.5 2.5 2.5 2.5 2.5 B 3.8 2. 3.3 58 2 0 8.5 2.5 2.5 2.5 2.5 2.5 2.5 9 4.6 2. 1.7 46 -- 8.0 2.5 2.5 2.5 2.5 2.5 2.5 C 5.0 2. 1.7 36 7.5 2.5 2.5 2.5 2.5 2.5 2.5 1 5.0 2.1 23 7.0 2.5 2.5 2.5

75.0 AN 3.47 2.1 1 2.84 462 429 2 0.1 3.57 2.50 2.50 2.50 2.50 2.50 X 5.0 7 70 13 2.5 2.5 2.5 2.5 2.5 N 1.7 0 .9C .50 9.0 7.0 2.5 2.5 2.5 2.5 2.5 2.5

MIN .50 AC-FT 54,980 CALLEGUAS CREEK BASIN

11106550 CALLEGUAS CREEK AT CAMARILLO STATE HOSPITAL, CALIF.--CONTINUED

DAY HCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 3.D 0 .72

1.8 2.1 .18 0 5 3.4 3.4 3.4 3.4 3.4 245 1.3 3.8 1.8 2.1 .18 .36

6 3.4 12 3.4 3.4 3.4 11 .90 2.5 3.0 .72 0 1.3 7 3.4 96 3.4 3.4 3.4 8.2 5.0 .72 3.8 1.3 0 .54 .72 C .18 .72 .45 1.7 0 .72 10 3.4 3.4 3.4 3.4 296 4.6 3.C 1.7 .45 1.3 0 .36

11 3.4 3.4 3.4 3.4 116 5.0 5.8 .36 .09 2.1 0 .36 .45 .54 0 .54 1.3 0 .54 0 0 C .54 .IB j : 2.1 16 3.4 3.4 3.4 20 3.4 7.4 6.6 1.3 .81 .18 0 .7 17 3.4 3.4 3.4 3.4 3.4 8.2 8.2 2.5 2.5 C .1

19 3.4 3.4 3.4 3.4 3.4 5.8 4.2 .5 .54 0 C .3 1.3 00.3

.81 0 0 .3 .27 'J 0 .3 2.1 00.3 3.C 0 0 .7 1.7 a o , .7 .18 C C .7 28 3.4 3.4 3.4 3.4 376 3.0 1.3 .8 2.5 .54 0 .7

MAX 3.4 96 3.4 70 376 440 S.2 4. 3.8 4.2 .90 2.1 0 0 C 0 55 5.5 64 SANTA CLARA RIVER BASIN

11108500 SANTA CLARA RIVER AT LOS ANGELES-VENTURA COUNTY LINE, CALIF. on downstrea

DRAINAGE AREA.--644 sq mi. PERIOD OF RECORD.--October 1! 52 to September 1970. GAGE.--Water-stage recorder. Datum of gage is 794.93 ft above mean sea level. AVERAGE DISCHARGE.--18 years 36.5 cfs (26,440 acre-ft per year); median of yei discharges, 8.8 cfs (6,400 acre-ft per year).

Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 17, 1965 0430 8,300 10.80 Jan. 24, 1967 1800 *6,S30 9.21 Jan. 21, 1969 0800 15,000 11.50 Nov. 24, 1965 0900 11,500 10.73 Mar. 13, 1967 0400 860 5.80 Jan. 25, 1969 0930 *68,800 19.01 Dec. 29, 1965 1900 *32,000 11.50 Feb. 6, 1969 0400 5,880 8.97 Nov. 19, 1967 0400 2,840 7.53 Feb. 25, 1969 0300 62,500 17.9 Nov. 7, 1966 1630 1,340 6.40 Nov. 21, 1967 1400 *3,480 6.22 Dec. 3, 1966 0900 625 5.55 Nov. 30, 1967 1300 1,360 6.27 Mar. 2, 1970 0500 *992 5.04 Dec. 6, 1966 1800 2,840 7.53 Annual minimum daily discharge, water years 1966-70 Wt Date Discharge Wtr yr Date 1966 Many days 0 1969 Oct. 16-18, 1968 1967 Oct. 9, 14-20, 23, 24, 1966 .10 1970 Sept.11-14, 1970 1968 Aug. 13 to Sept. 25, 1968 .60 Period of ecord: Maximum discharge,large, 68,80068 cfs Jan. 25, 1969 (gage height, 19.01 ft), from rating curv extended abov 9,200 cfs on b of field estimate of peak flow; no flow at times in some ye REMARKS.--Records poor. No regulation above station. Base flow affected by pumping from wells along str al Survey, nished by Ven-

REVISIONS.--WSP 1928: Drainage area. DISCHARGE, IN CUBIC FEET PER SECONOi WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY OCT NOV DEC JAN FEB MAR APR HAY JUN JUL 0 .6 142 27 16 .6 1.0 .80 .10 0 .2 130 24 16 .3 .90 .80 .30 0 .2 98 20 16 .0 .70 .80 .20 .10 .8 72 25 16 .4 .70 .70 0 .10 .4 54 25 17 .1 .70 .70 .30 L .6 44 74 18 .1 .70 .70 .63 o .0 37 49 19 .1 .80 .70 .40 .10 .6 37 48 20 .1 .70 .60 .30 .10 .0 39 46 21 .1 .70 .80 .20 .20 .0 36 45 20 .1 .80 .80 .20 .30 3 35 42 19 .9 .90 .80 .30 .40 .3 30 40 17 .6 1.0 .80 .30 .80 .0 28 35 16 .4 1.0 .80 .30 1.0 .3 28 33 16 .4 .70 .80 .30 1.6 .6 28 33 16 .2 .60 .80 .30 5.8 .6 22 35 16 .8 .70 .80 .20 1,500 .6 23 30 14 .8 .70 .90 .20 213 .3 21 29 13 .0 .60 1.0 .20 5.3 .0 26 28 12 .2 .60 .90 .30 3.4 .4 25 23 12 .0 .70 .90 .30 2.2 .1 24 25 12 .0 .80 .70 .30 2,250 .1 23 28 9.6 .0 .80 .70 .30 1,140 .1 23 24 10 .0 .90 .60 .30 2,730 .1 21 23 9.6 .0 .90 .60 .30 88 .4 22 19 10 .8 .90 .20 .30 16 .7 21 18 9. .0 .0 .20 .30 11 .7 23 18 9. .0 0 .20 .20 9.6 .7 23 17 9. .0 .0 .20 .10 9.1 7,961 22 .... _ . 9. .0 .0 .10 .30 7.6 74 52 ______9. .8 .1 .10 .30 31 19f 37 . 0 - .0 .10 TOTAL 8.00 MEAN 267 91 40.2 31.5 14.1 5 2 54 1 ! .83 .63 .27 MAX 21 . 6 4 1.1 1.0 .60 MIN 0 .1 21 17 8.6 .8 0 .60 .10 0 AC-FT 8 56 )0 51 39 16 SANTA CLARA RIVER BASIN

11108500 SANTA CLARA RIVER AT LOS ANGELES-VENTURA COUNTY LINE, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

2 .30 .80 2.4 S.6 48 30 125 193 45 15 4.0 3 .30 .90 20S 8.6 52 32 116 179 45 15 4.0 4 .30 1.0 12 10 39 34 97 155 45 14 4.0 5 .60 1.1 157 10 43 32 143 167 43 14 4.0

7 .20 266 149 S.6 43 28 102 137 39 12 4.5 8 .20 6.8 32 7.9 45 26 75 125 38 11 4.5 9 37 11 4.5 10 10 4.5

11 .20 2.6 5.S 7.2 41 39 116 102 35 S.6 5.0 12 .20 2.4 5.1 5.8 55 143 116 92 34 7.9 5.C 13 .20 2.4 4.4 5.8 45 482 167 SO 33 7.7 5.0 14 .10 2.2 4.4 S.6 37 225 116 72 33 7.3 5.0 15 .10 2.2 3.7 S.6 32 149 149 65 33 7.0 5.B 16 .10 2.2 5.1 10 24 106 143 58 30 7.0 5.1 17 .10 2.2 6.5 9.3 21 125 116 54 24 7.0 5.1 18 .10 2.2 6.5 7.2 2S 92 201 53 23 7.0 5.S 20 .10 2.2 6.5 9.3 26 58 111 51 20 6.5 6.3 21 .20 1.8 8.6 8.6 26 92 217 48 IS 6.0 6.0 22 .20 1.6 7.2 770 37 48 620 48 18 5.5 6.0 23 .10 1.4 5.1 376 34 37 450 4S 18 5.0 6.0 24 .10 1.4 5.1 1,850 34 32 422 4S 17 4.6 6.0 : 25 .20 1.4 5.1 793 45 37 337 48 17 4.5 5.8

27 .30 1.6 5.1 137 30 62 155 4S 16 4.0 5.S 28 .50 1.8 5.8 116 30 62 257 48 16 4.0 5.6

MEAN .26 10. 8 59.8 148 38.6 78.3 18S 88.2 28.9 8.13 5.08 3

MIN .10 .70 1.6 5.8 21 26 48 45 15 4.0 4.0

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 196S DAY SEP

1 1.8 68 25 26 19 21 7.2 2.6 8 1.0 .60 2 1.8 52 25 26 19 43 7.1 2.6 1.0 .60 3 2.0 28 25 25 18 24 7.0 2.3 1.0 . 6C 4 2.0 20 24 25 17 21 7.0 2.3 1.0 .60 5 2.2 19 24 26 16 18 7.0 2.6 1.0 .60 6 2.2 Ifl 23 27 15 17 6.9 3.0 1.0 .60 7 2.4 18 23 27 46 16 6.8 3.0 1.0 .60 8 2.6 18 22 27 262 15 6.7 3.7 1.0 .60 9 2.6 18 22 26 78 14 6.6 3.7 1.0 .60 10 2.6 18 21 26 55 13 6.4 3.7 .90 .60 11 2.9 17 21 26 32 12 6.3 3.7 .80 .60 12 2.9 17 21 26 32 11 6.2 3.6 .70 .60 13 2.9 17 21 25 43 11 6.1 3.6 .60 .60 14 2.8 17 21 39 41 11 6.0 3.5 .60 .60 15 2.6 17 21 32 35 10 5.7 3.4 .6C .60 16 2.6 17 21 32 32 10 5.4 3.3 .6C .60 17 2.6 16 20 24 31 10 5.2 3.3 .60 .60 18 2.9 106 20 28 29 9. 5.0 3.3 .60 .60 19 3.1 28 50 20 35 28 9. 4.7 3.3 .60 .60 20 2.6 10 40 20 30 26 9. 4.5 3.2 .60 .60 21 2.4 535 35 20 28 25 9. 4.4 3.2 .60 .60 22 3.1 194 30 20 27 25 9. 4.4 3.2 .60 .6C 23 3.1 78 28 21 26 24 8. 4.4 3.1 .60 .60 24 3.7 55 26 20 25 24 S. 4.4 3.0 .60 .60 25 4.3 37 25 23 23 23 8. 3.7 3.0 .60 .60 26 4.0 28 25 23 22 23 8. 3.7 3.0 .60 .60 27 3.7 21 2 28 21 22 8. 3.7 2.9 .60 .60 28 3.4 20 2 30 20 21 8. 3.7 2.9 .60 .60 29 2.9 IS 2 32 20 20 7. 3.7 2.8 .60 .70 30 2.4 151 2 30 20 7. 3.0 2.8 .60 .80 31 3.1 2 20 - 3.0 .60

TOTAL 86.2 1,586.7 88 715 IS. 30 i .74 .61 1.0 .80 MIN 1.8 2.9 1 20 20 15 7.4 3.0 2.3 .60 .60 ) 45 36 SANTA CLARA RIVER BASIN

11108500 SANTA CLARA RIVER AT LOS ANGELES-VENTURA COUNTY LINE, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

OCT NUV JUN JUL AUG

1 .80 2.3 4.4 2.6 209 1.60C 165 88 51 35 22 14 2 .83 1.8 4.4 3.7 173 1,300 166 89 51 3B 22 14

4 .80 2.3 5.8 3.7 125 1,000 170 3 53 37 22 14 5 .ac 2.3 5. a 2.7 185 900 165 6 55 36 22 14 6 1.0 5.1 5.8 3.C 1,450 800 160 B 56 35 21 14 7 l.C 5.8 4.4 .9 629 750 158 a 57 34 21 14 8 1.0 5.1 4.4 1.5 15 1C 1.5 2.3 5.1 3.7 283 580 15

11 1.8 2.3 4.4 3.0 15 12 .1.8 1 . b 4.4 3.0 2B 19 15 13 2.3 3.0 5.1 13 210 420 120 B4 60 27 19 15 14 2.6 4.4 5.1 14 149 350 lie BO 56 26 18 16

16 .47 2.6 4.4 1.5 336 310 115 72 48 24 18 16 17 .47 2.3 5.1 .90 209 290 114 68 44 23 17 17

.62 3.7 5.1 56 431 260 112 60 36 21 17 17 2D .80 3.7 5.1 365 364 250 111 55 33 21 16 18

21 .80 3.7 4.4 3,670 301 230 111 52 31 20 16 IB 2? 1.0 3.7 487 783 210 109 51 30 20 16 IB 23 1.5 3.0 3.7 2B 20 15 19 5.1 15 19 25 1.5 3.0 9.3 27,400 28,800 165 98 50 26 20 15 20 26 1.5 3.7 4.4 14 20 27 2,700 49 27 20 14 20 28 1.8 5.1 3.0 300 2,300 165 85 48 28 21 14 21 29 1.8 5.8 2.3 275 165 86 48 31 21 14 21 3; 2.3 5.8 ?.6 250 165 85 50 33 22 14 22

B17 553 503 EAN 17.8 16.8 2.6 5.8 9.3 27,400 28,800 1,600 170 9B 63 38 22 22 IN .47 1.8 2.3 .90 125 165 B5 48 26 20 14 14

.47 AC-FT 7,220

NOTE NO GAGE-HEIGHT RECORD F :B. 23 TO A PR. 30.

AY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 22 4C 27 2B 24 548 39 27 29 26 IB .9 2 .8 3 22 36 27 27 27 30 25 IB .7 22 35 28 27 28 125 39 26 30 25 18 .6

6 22 36 30 26 30 155 3B 26 30 25 18 .2

8 21 57 32 ?5 33 73 38 26 29 24 18 8.8 9 21 53 33 25 61 58 37 27 29 24 IB B.7

1 21 49 34 35 101 46 36 27 29 24 17 B.5 2 17 8.5

4 28 29 24 17 B.5 5 20 41 35 26 41 44 34 28 29 23 17 B.6 6 30 40 35 27 42 44 33 28 29 23 17 B.7 7 34 38 35 30 39 43 32 28 29 23 16 B.B a 42 43 31 28 29 23 16 8.B 31 35 35 3? 26 39 42 30 2B 29 23 15 9.0

2 36 32 32 25 38 41 30 28 29 24 15 .1 4 37 30 31 25 36 41 29 28 28 24 14 .2

6 38 2B 3C 24 35 40 29 2B 28 22 13 .4 7 39 28 30 24 32 40 28 28 27 21 12 .5 a 39 2B 29 24 188 39 2B 2B 27 20 12 .6 9 40 27 29 24 39 28 29 27 19 11 .8

1 *° 28 24 39 29 18 10 851 863 719 4B5 273.5 X 39 29 30 26 IB 10 N 20 27 27 24 24 39 27 25 26 IB 10 8.5

AL YR 1969 TOTAL 130, 407.80 MEAN 357 MAX If ,800 WIN .90 AC-FT 258,700

NOTE. STAGE-DISCHARGE RELATION INDEFINITE EXCEPT FEB. 6 TO MAR. 6. SANTA CLARA RIVER BASIN

11109600 PIRU CREEK ABOVE LAKE PIRU, CALIF. ight bank at

PERIOD OF RECORD. --October 1955 to Septembeir 1970. GAGE. -- Water- stage recorder. Datum of gage is 1,063 .62 ft above mean sea level (levels by Ventura Coun ty Flc

AVERAGE DISCHARGE.--15 years, 57.8 cfs (41,880 acre- year) ; median o charges,, 20 cfs (14, 500 acre-ft per year) . EXTREMES. --Maximums and minimums (discharge in cubic feet p er second, gage height in feet) .

An peak dis charges rs 1966- 70 Date Time Disch. G.H. Date Disch. G.H. Date Dis ch. Nov. 16 , 1965 2330 3,550 7.15 Jan. 24, 1967 1600 1,410 5.49 Jan. 25, 1969 0900 20, 800 a: Nov. 24 , 1965 0930 8,400 9.80 Mar. 13, 1967 0700 1,210 5.21 Feb. 6, 1969 - (b ) Dec. 29 , 1965 1700 *9,000 alO.l Feb. 25, 1969 0200 *31, 200 a[ Nov. 20, 1967 0900 *912 4.67 Nov. 7 , 1966 1500 1,200 5.15 Feb. 28, 1970 1500 - *2, 150 21, 1969 0500 9,040 10.62 a From floodmarks. b Probably less than 6,000 cfs..

Annual minimum d charge,

Wtr yr Date 1966 Oct. 2, Oct. 20 to Nov. 13, 1965 1969 Oct. 1, 2, 1968 1967 Oct. 9, 1966 1970 Aug. 11-17, 1970 1968 Sept.26, 27, 1968

age height, 18.6 ft, from floodmark),*f height 12.2 ft and inflo

COOPERATION.--Twenty-eight discharge measurements furnished by Ventura County Flood Control District. REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT * UL AUG SEP

1 .10 0 65 726 89 6 , 36 16 11 .0 1.0 .40 2 0 0 51 503 83 6 » 36 16 11 .0 1.0 .40 I .10 0 41 88 76 .5 i 35 16 10 .8 1.2 .30 4 .10 0 21 29 72 5 , 33 15 9. .6 .90 .7J 5 .1C c 05 73 70 5 > 31 15 9. .8 .70 .30

6 .10 0 12 31 177 5 J 31 15 a. .6 .60 .20 7 .10 c 84 10 195 5 > 30 15 8. .6 .60 .30 B .10 0 80 92 131 5 L 29 15 9. .4 .60 .20 9 .10 0 78 75 115 5 ) 29 17 9. .2 .60 .20 10 .10 0

11 .10 0 12 55 103 4 i 28 19 6. .1 .60 .20 12 .10 0 77 41 99 4 ) 27 18 5. .1 .70 .30 13 .13 0 76 29 94 4 9 26 16 5. .1 .60 .40 14 15 .10 64 71 115 90 4 i 25 15 4. .2 .50 .40 105' 16 .10 862 65 86 4 24 14 3. .2 .50 .40 17 .10 2,170 65 92 84 4 24 14 3. . 1 .40 .40 18 .10 856 59 90 83 4 24 13 3. .1 .4C .5C 19 .10 406 55 89 82 4 24 12 3. .0 .30 1.3 20 0 188 53 88 80 4 23 12 3. .0 .40 1.9

21 0 109 53 86 74 4 23 12 3. .1 .40 1.5 22 0 1,090 53 84 72 3 22 12 2. .1 .40 .90 23 0 2,480 51 83 1 3 21 12 2. .1 .40 .50 24 0 3,870 49 82 0 3 21 12 2. .0 .40 .40 25 0 1,150 48 80 0 3 20 12 2. .0. .20 .50

26 0 69C 48 78 0 3 20 12 2. .0 .20 .90 27 0 462 48 77 3 4 20 12 2. .1 .10 1.1 28 0 288 45 77 9 4 19 12 2. .1 .10 .80 18 12 2. .3 .3C 1.6 30 0 173 1,990 137 3 17 12 2. .5 .30 2.4 31 0 912 97 3 12 - .3 .40

20.10 MEAN .058 503 MAX .10 .0 1.2 2.4 HIN 0 0 45 76 69 3 r 17 12 2. ) .0 .10 .20

CAt YR 1965 TOTAL 28.32C.80 MEAN 77.6 MAX 3,950 MIN 0 AC-FT 56,170 SANTA CLARA RIVER BASIN

11109600 PIRU CREEK ABOVE LAKE PIRU, CALIF.--CONTINUED

DEC JAN FEB MAR APR MAY 2. 17 .1 1. .70 21 32 11* 34 119 278 6B 23 3.6 .3 1. 1.1 138 29 89 34 165 275 63 21 .8 .4

0 460 994 28 61 31 182 242 60 20 .5 .5 0 2*9 .5 .4 0 62 278 .9 .4 0 37 60 20 .9 .9 1. 26 158 27 41 68 221 222 59 19 .7 .2 1. 23 .4 .0 1. 21 87 .0 .9 I. 15 .7 .4 I. 12 71 25 40 261 143 138 50 18 .9 .2 1. 11 68 23 41 221 254 125 49 15 .4 .8 0 8.2 66 22 42 1B3 264 116 47 14 .5 1

33 63 23 40 132 373 102 42 12 .4 .0 1. 23 61 270 38 121 524 98 39 12 .0 .0 1. 21 57 188 38 117 436 96 38 12 .7 .0 0 17 51 444 54 103 413 91 36 11 .2 .8 0 17 48 277 49 92 425 89 33 10 .2 .2 1. 17 45 201 43 84 420 88 32 9.6 .7 .5 t. 17 41 168 38 84 410 84 30 9.6 .3

MX 2 M N >0 .70 17 22 38 30 98 71 27 9.5 .1 3.1

DAY MAY '»" '"' AUG SEP 1 5.8 82 26 24 25 42 15 .8 1.2 .22 .08 2 6.C 59 26 23 24 47 15 .7 .91 .20 .07 3 6.3 49 26 23 23 34 14 .3 .84 .17 .12 4 .15 .09 5 7.1 41 24 23 22 27 15 .7 .66 .16 .06 6 7.7 39 24 23 22 26 15 .6 .68 .16 .04 7 7.6 37 24 22 45 25 1* .7 .61 .21 .04 8 9 7.8 34 24 24 102 23 14 .17 .07 i: 7.8 33 '.3 '.1,2 .24 .05 i . 7.8 32 2 8.2 31 24 25 43 22 15 .8 .46 .28 .02 3 8.6 30 23 43 52 22 15 .6 .37 .27 .03 4 8.1 27 23 39 50 22 14 .2 .38 .27 .33 5 8.4 26 23 33 43 21 13 .0 .39 .29 .05 6 8.9 30 23 31 39 21 12 .9 .45 .28 .03 7 . .1 29 22 33 38 22 12 .5 .45 .20 .02 8 .6 42 22 34 36 21 11 .4 .35 .13 .02 9 . 8 47 21 37 34 21 9.8 .3 .31 .16 .05 0 39 39 21 34 33 21 9.7 .1 .28 .19 .06 1 58 32 21 32 31 21 9.7 .8 .28 .13 .14 2 41 29 21 31 30 20 10 .4 .28 .15 .06 3 14 30 21 30 30 19 9. .2 .21 .13 .02 4 8 31 21 29 29 18 9. .2 .21 .11 .03 5 6 30 20 28 28 18 8. .3 .22 .08 .02 6 4 .09 .01 7 4 29 25 27 26 16 7. .1 .21 .13 .01 8 . 4 29 31 26 25 16 7. .2 .23 .08 .04 9 . 3 28 23 25 24 15 6. .3 .23 .05 .02 0 15 28 22 ______24 15 6. .3 .22 .05 .C2 1 26 23 24 6. .23 .08 690 359. 9 .2 14.17 5.24 1.41 MEAN 50 7 .9 35.7 23.3 28.3 40.1 23.0 11. 3 17 .46 .17 .047 MAX 80 82 31 43 183 *7 15 .8 1.2 .29 .14 M1N . B 26 20 22 22 15 6.2 .1 .21 .05 .01 712 1 89 28 10 2.8 SANTA CLARA RIVER BASIN

11109600 PIRU CREEK ABOVE LAKE PIRU, CALIF.--CONTINUED OISCMiRSF. IN CUBIC FEET PFS SECOND, «»TE" YFAR OCTOBER 18 TO SEPTEMBER 1969

.02 2, .9 8,0 330 1,330 320 120 60 30 15 2 15 12 5 .08 1. .9 7.7 350 716 310 130 51 26 11 6 .7 7 .8 fl 115 511 26 115 50 25 10 .87 3, .9 fl.1 1100 570 260 110 5U 211 .7 11 .97 3. .1 B.I 1 12 13 .1 3. .3 9.0 3110 550 2«0 98 511 I 10 .6 3. .3 19 !i 15 ^ 5 .7 12 100 20 8.6 1 16 .T 5. .3 10 115 5ao 180 90 85 22 11 17 .6 5. ,9 9,5 310 510 175 B8 72 22 15 18 .5 V. .0 12 305 525 170 85 66 21 15 .3 o. .« 515 303 500 165 82 56 20 10 20 ,5 (1. .5 1,180 300 080 160 80 118 20 ID

21 .0 0, .5 11,060 13 2? .0 0, .9 608 321 12 21 .1 1. .8 OOB 3,300 070 150 01 19 11 .3 o. .1 791 7,880, 080 105 ?. 18 11 25 3 o, 1 9, BIO IS, 610 1100 too 0 38 18 10 26 .2 5, 1 7,710 3,600 370 135 0 18 18 10 27 .2 5. .1 3,160 2,080 SaO 130 8 37 18 10 1 2B .? 5, ,0 719 1,670 330 125 B 15 IB 10 29 .5 5. .3 1196 330 120 6 33 17 10 1 iO < .? S. ,2 010 120 3?0 TOT4U 3«

1AX 2.6 5, 11 9,810 .02 ?. .7 7.7 17 8.6 6

0«V CICT NOV DEC FES

1 <>.7 13 20 20 22 877 116 28 5 5. t.l 2.2 2 '.7 10 19 20 22 ?5 116 20 5 5. 1.1 2,2 1 9.7 10 20 18 22 50 «6 27 a 4 , t.l 2.2 II 9.7 10 19 17 21 UO 115 27 a 4 , 1.1 2.? 5 1 1 15 20 18 22 00 an 26 3 a. t.o 2,2 6 11 117 20 18 21 BO Oil 25 3 _ t.o ?.l 7 10 60 20 18 21 60 HO 25 2 a) 1,0 2.1 8 10 30 21 20 21 110 Oil 211 2 a f ,9 2.1 9 10 29 21 20 50 25 a3 21 11 a. .9 2.1 10 to 25 21 90 267 15 a3 22 11 i. ,9 2.1

It 10 20 21 119 293 10 03 22 11 0. ,, 2.1 12 11 21 21 33 1B9 05 02 22 11 0. ,9 2.1 11 11 22 20 28 lab 00 02 22 10 0. .9 2.1 10 12 22 20 29 71 98 112 21 to a. .9 2.1 15 12 21 20 25 65 95 01 21 10 J B ,9 2.2 16 12 22 19 27 51 2.2 17 13 21 20 29 111 91 36 20 9.0 3, .90 2.2 18 13 20 20 27 19 85 37 20 9.0 5.0 2.2 19 to 19 20 26 38 76 16 19 8.0 3! 3.0 2.2 20 13 19 21 25 J7 69 35 19 8.0 3. 2,5 2,2 21 13 20 21 25 37 60 35 19 7.4 j. 2,0 ?.o 22 13 20 21 2a 36 60 34 18 7.0 5 2.0 2.2 23 to 20 20 21 32 56 33 18 7.0 1, 2,0 2.2 20 It 20 20 20 29 5? 32 18 7.0 3. 2,0 2.2 25 ID 19 20 21 28 50 31 18 6.0 3. 2,0 2, 2.S 2.11 27 13 19 21 23 26 08 31 17 5.6 2. 2.3 2.0 28 13 19 21 25 6SO 08 31 17 5. « 1. 2.3 2.11 29 12 19 19 22 ...... 07 30 16 5.Z 1 . 2.3 2.11 10 13 19 18 21 ...... 07 30 16 5.2 1. 2.3 2.7 31 13 111. 52,95 66,0 MEAN 11,9 22, a 20.1 26.5 8J.J 14* 38. k 21.0 9.S9 1.6 1.71 2.21 la 60 21 IS 5. S.O 2.7 UN 9.7 13 18 17 21 06 30 16 5.2 1. .90 2.0 ?2 105 132

MIN ,90 AC-FT 23,300 SANTA CLARA RIVER BASIN

11109700 LAKE PIRU NEAR PIRU, CALIF.

on left bank 1,000 ft upstrea n from left e nd of dam, 0 5 mile downstream from Santa Fe licia Canyon and 4.2 miles no rtheast of Piru. DRAINAGE AREA. - -425 sq mi.

PERIOD OF RECORD. --May 1955 to S eptember 1970

Prior to Jan r at same datum. EXTREMES. --Max! mums and minimums (contents in acre-feet, elevation in feet) for the water years 1966- 70 are con- tamed in the following table Maximum observed Minimum observed 1966 Mar. 15 -22, 1966 57,576 ,014.45 Nov. 14, 1965 5,866 926.75 1967 June IS -23, 1967 64,895 ,022.1( Nov. 18, 1966 10,134 943.35 1968 Apr. 3 , 1968 37,056 990. 1( Nov. 1-19, 1967 24,799 972.90 1969 Feb. 25 , 1969 109,400 ,061.45 Dec. IS, 1968 24,900 973.10 1970 Apr. 1 , 1970 71,200 ,028.40 Sept. 30, 1970 27,800 977.40 Period of record: Maximum contents observed, 109,4 00 acre-ft Feb. 25, 'l969 (e'levat ion, 1,061.4 5 ft); lake dry Oct. 25 to Nov. 20, 1961.

made in 1949 and 1956. Dead storage below two 24- inch sluice gates (elevation, 880.0 ft) , 74 acre -ft. Iway level [ :er is )xnard plain.

REVISIONS. --WSP 1928: Drainage area.

MONTHEND ELEVATION AND CONTENTS , WATER YEARS OCTOBER 1965 TO SEPTEMBER 1970

DATE ELEVATION CONTENTS CHANGE IN DATE ELEVATION CONTENTS CHANGE IN (ACRE-FEET) (ACRE-FEET)

35,535 +29,549 NOV. 30...... 973.25 25,000 -400 .... 1,002.20 46,732 25,000 0

JAN. 31, 1966...... 1,010.85 87,200 +62,200 FEB. 28...... 57,112 +2,837 102,500 +15,300 57,437 + 325 101,700 -800 -100 JUNE 30...... 98 .00 31,044 -11,785 JUNE 30...... 1,054.45 100,500 -900 JULY 31...... 96: .45 92,900 -7,600 AUG. 31...... 95:. 25 13,940 -4,016 AUG. 31...... 1,033.25 76,300 -16,600 13,587 -353 SEPT. 30...... 1,018.50 61,400 -14,900 WTR YR 1966.. - WTR YR 1969...... - +35,500

OCT. 31...... 95 .55 13,196 -391 51,300 -10,100 .... 96 .55 48,900 -800

JAN. 31, 1967...... 978.10 28,297 50,900 +2,000 30,047 +1,750 FEB. 28...... 1,011.70 55,000 +4,100 .... 991.80 38,365 +8,318 MAR. 31...... 1,028.30 71,100 +16,100 .... 1,012.55 55,823 70,100 -1,000 63,866 +8,043 61,000 -9,100 JUNE 30...... 1,021.95 64,747 + 881 JUNE 30...... 1,005.75 49,800 -11,200 JULY 31...... 1,014.90 57,995 -6,752 JULY 31...... 990.95 37,700 -12,100 AUG. 31...... 992.25 38,715 -19,280 31,600 -6,100 SEPT. 30...... 974.90 27,800 -3,800

OCT. 31...... 972.95 24,832 -1,289 t ELEVATION AT 0800 HOURS. 28,714 +3,882 DEC. 31...... 31,224 + 2,510

CAL YR 1967...... - +8,565 JAN. 31, 1968...... 984.30 32,711 +1,487 .... 986.50 34,336 +1,625 MAR. 31...... 989.75 36,788 +2,452

MAY 31...... 986.60 34,410 -1,959 JUNE 30...... 983.35 32,018 -2,392 AUG. 31...... 975.55 26,558 -2,785 25,922 -636 WTR YR 1968.. SANTA CLARA RIVER BASIN

11110000 PIRU CREEK NLAR PIRU, CALIF. (Formerly published as 11-1098 Piru Creek below Santa Felicia Dam) LOCATION.--1

1.5 miles upstream. DRAINAGE AREA.--437 sq mi.

PERIOD OF RECORD.--May 1955 to September 1970. October 1911 to April 1955

Sept. 30, 1965. GAGE.--Wa

AVERAGE DISCHARGE.--29 years (1927-56), 54.8 cfs (39,700 2-ft pe 25 cfs (18,100 acre-ft per year). EXTREMES.--Maximums and mlnimums (discharge in 1966-70 are contained in the following table Mi ily Wtr yr Date Discharge G.H. Date 1966 Dec. 25-27, 1965 a348 Nov. 24-26, 1965, Jan. 2, 1966 1967 Nov. 11, 12, 1966 3400 Nov. 8, 9, 1966 1968 Oct. 1, 2, 1967 a!92 Jan. 24-31, Feb. 2, 3, 1968 1969 Feb. 25, 1969 28,800 15.9 Dec. 18, 1968, Jan. 1-18,20,22,1969 1970 July 23, 1970 .202 3.50 Feb. 6, 1970

Ma:

upstream (see static 1970 are published i

REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND. MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FEB

1 8.0 .5 .10 24 38 99 01 195 198 2f8 B 2 B.3 , 5 0 25 3B 101 61 195 19B 2 B B 3 8.7 .5 7 39 38 101 04 195 198 2 8 7 4 8.7 .5 9 40 38 01 04 195 198 2 B 8 S 8.7 f 5 9 40 38 01 01 195 231 2 8 B b B.7 .2 9 B.B 39. 01 Dl 195 203 2 B 1 B.7 .10 9 25 39 01 01 195 201 2 B B 8.7 .8 0 39 39 01 98 195 200 2 9 8.7 .3 1 40 28 01 98 196 204 2 1C B.7 . 3 0 27 15 01 9B 198 210 8 11 B.7 . i 0 25 39 99 9B 196 216 12 8.7 .1 0 39 39 99 98 195 221 13 8.7 12 0 40 39 99 98 195 223 14 8.7 17 0 43 39 99 98 195 225 15 8.7 * 0 40 39 99 98 195 225 16 4.4 .9 0 40 39 99 98 196 224 17 .SO .9 0 40 39 99 98 196 225 IB .10 .7 0 40 39 99 98 195 227 B 19 .60 .7 9 39 39 99 98 194 225 » 20 .40 3 B 39 39 99 98 195 226 B

21 .80 3 B 39 39 99 98 196 227 B 22 .60 3 23 .10 3 8 39 40 99 95 195 226 24 0 3 B 39 40 99 9B 194 226 25 0 3 t 8 39 40 101 98 195 213

26 0 3 E 8 38 3B 101 95 195 215 27 .10 3 E 9 38 38 101 98 195 215 28 1.6 2 < 9 3B 36 101 98 195 216 2.5 1< 30 2.5 .10 4 78 101 95 198 217 4 31 .10 2 99 ______95 217

MEAN 7 MAX 8.7 348 41 4C 99 101 04 198 227 18 B WIN 0 .10 3 B.8 15 99 01 194 19B 4 4 SANTA CLARA RIVER BASIN

11110000 PIRU CREEK NEAR PIRU, CALIF.--CONTINUED

Y OCT JUL AUG SEP

1 5.1 8.C 5.1 39 40 5.5 12 3.3 41 39 351 296 2 5.2 7.8 3.6 39 40 7.3 28 3.3 41 39 351 295 3 5.* 7. .60 39 40 7.7 41 3.5 41 40 351 294 4 7.1 7. .40 39 40 7.1 18 3.5 41 40 351 293 5 9.9 7. .60 39 40 7.5 3.5 41 40 352 292 6 10 7. 1.0 39 40 a. 3.1 3.5 23 41 352 286 7 8.7 3. 2.9 39 40 8. 3.3 3.5 .39 41 352 285 R.I 0 1.6 40 41 352 285 9 8.0 6.7 39 40 8.1 3.3 3.5 .14 42 352 284 C 7.7 194 9.2 39 39 8. 3.3 3.5 .14 42 352 264 1 7.7 400 5.7 29 41 6.2 3.3 .5 .14 42 352 280 2 7.* 400 2.9 17 41 5.4 3.3 .7 .14 42 352 279 3 7.2 398 .1 39 41 3.3 3.5 .7 20 42 352 279 A 7.2 396 39 41 3.3 3.4 .9 38 43 352 278 5 6.6 396 39 41 26 3.3 2 39 43 353 278 6 6.4 393 39 41 28 3.3 39 43 352 274 7 6.2 257 39 41 29 3.4 39 43 351 275 8 6.0 4.5 25 41 40 3.5 39 180 322 278 9 6.0 3.5 38 41 40 3.5 39 259 348 216 0 5.8 2.8 37 41 40 3.3 39 260 347 193 1 5.6 .20 37 41 40 3.4 39 260 322 193 2 5.5 .20 18 41 40 3.3 39 260 297 193 3 5.6 3.2 2.2 41 4C 3.3 39 260 297 193 4 5.5 4.5 2.3 41 40 3.3 39 260 299 193 5 7.6 4.6 2.2 14 40 3.3 39 260 3CO 193 6 7.2 4.7 2.2 1.3 39 3.3 39 260 300 193 7 6.2 4.7 29 1.3 39 3.3 39 260 299 192 8 7.4 4.6 42 1.3 40 3.3 39 260 298 192 9 8.0 4.7 42 40 3.3 39 263 30C 191 0 8.0 5.C 32 41 3.3 39 260 300 191 1 7.9 23 326 300 TAL 216.2 2,931.20 753.60 956.9 990.9 723.1 185.5 6 7.4 911.11 4,328 10,309 7,448 AN 140 333 248 X 10 326 353 296 N 5.1 0 .40 2.2 1.3 3.3 3.1 3.3 .14 39 297 191

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCrOBER 1967 TO SEPTEMBER 1968 Y OCT NOV AUG SEP 19 5.1 5.6 19 5.1 .25 .20 0 2.0 .33 40 39 42 46 5.6 5 5.1 .23 .20 0 1.4 25 40 39 42 46 5.4 .5 5.1 .22 .20 1.4 1.4 42 40 40 42 6 4.7 .2 5.1 40 40 43 6 .2 5.1 .21 .21 2.5 7.7 42 39 40 43 6 4.8 .2 5.1 .21 .21 2.5 7.8 42 39 40 43 6 4.9 6.2 5.1 20 .21 2.5 3.4 37 40 40 43 6 4.B 6.2 4.8 .21 .22 2.5 .20 30 40 40 43 6 4.8 5.9 4.8 ZO .23 2.5 .20 31 40 41 43 6 8.2 5.9 4.8 .23 .21 2.5 .20 31 40 41 44 46 7.5 5.6 4.8 .21 .20 2.5 .20 31 40 41 44 46 5.9 5.6 4.8 .24 .19 2.2 .21 29 40 41 44 46 5.9 4 5.4 4.8 .25 .18 1.6 .20 30 40 41 44 46 6.0 5 5.4 4.B .22 .19 1.7 .20 30 39 41 44 46 6.2 6 5.4 4.8 .20 .19 1.8 .20 30 39 41 45 46 6.0 7 5.4 4.8 .21 .20 1.8 .20 30 40 41 45 46 6.2 8 5.1 4.8 .26 .21 1.9 .21 30 40 41 45 46 6.2 9 5.4 5.1 .24 .21 1.9 .20 30 40 41 45 60 6.5 0 5.4 5.1 .23 .21 1.9 .20 29 39 41 45 67 6.3 1 5-. 4 5.1 .23 ' .20 2.0 .20 29 39 41 45 67 6.2 2 5.9 4.8 .22 .19 2.0 .20 29 40 43 45 67 6.2 3 6.5 4. a .21 .22 2.1 .20 29 39 43 45 67 6.2 4 6.2 4.2 .22 0 2.2 .20 29 39 43 46 67 5.9 5 5.9 4.2 .20 0 1.9 .20 29 39 43 46 67 5.9 6 5.6 4.2 .20 0 1.9 .20 29 39 43 46 67 6.2 7 5.6 4.2 .20 0 1.9 .19 28 39 43 46 27 6.3 8 5.6 3.6 .20 0 1.9 .18 26 39 42 46 5.6 6.2 9 5.6 1.5 .20 0 1.9 .43 37 39 42 46 5.9 6.3 0 5.6 .40 .21 0 .26 39 39 42 46 5.9 6.4 1 5.4 .20 0 .35 46 5.6 178.1 AN 19.3 4.53 .22 .15 1.87 1.19 29.9 39.5 41. L 44.3 45.4 5.94 X 192 5.1 .27 .23 2.6 7.8 42 40 43 46 67 8.2 N 5.1 .40 .20 0 0 .18 .33 39 39 42 5.6 4.7 1,780 2,430 2,450 2,730 2,790 353 SANTA CLARA RIVER BASIN

11110000 PIRU CREEK NEAR PIRU, CALIF.--CONTINUED DISCHARGE. IN CUBIC FEET PER SECOND) WATER YEAR. OCTOBER 1968 TO

1 5. .9 0 8.8 1,530 10 173 57 87 327 300 2 5. .1 0 29 1,200 85 171 56 85 328 292 3 5. .1 0 25 1,070 06 171 55 83 326 294 4 6. .1 0 28 896 53 163 54 81 324 283 5 5. .2 0 30 825 43 156 53 79 322 283 6 g s .2 0 3.6 788 33 150 52 77 324 284 7 5. .2 0 .20 709 49 141. 51 75 324 284 a 5. .2 0 9 5. .2 0 .10 606 72 148 49 75 321 284 1* 5. .2 0 .10 600 66 145 48 120 325 284 11 5. 0 0 564 66 1*1 47 163 328 284 12 5. .2 0 0 504 63 136 13 5. .2 0 29 483 63 140 48 137 328 283 U 5. .2 0 32 472 52 106 50 101 326 283 15 5. .2 0 31 457 40 91 52 102 326 280 16 5. .2 0 30 448 10 91 54 116 3?3 281 17 5. .8 0 29 438 10 90 96 139 324 284 IB 5. 0 28 429 21 89 58 142 324 287 19 5. .2 7.1 27 424 95 87 60 185 324 286 2C 5. .6 0 26 410 92 85 62 204 324 284 21 S. .6 9.3 25 424 90 82 64 211 324 284 22 5. .6 0 24 415 90 81 66 240 324 284 23 5. .6 24 2,860 385 88 24 5. .6 141 7,22; 185 25 6. .7 167 7,800 349 12 71 74 252 324 185 26 S. .8 24 4,420 329 73 68 80 274 310 185 27 S. .9 .17 2,480 320 65 64 86 276 309 185 28 5. .9 .53 1,870 337 69 6-3 86 267 310 185 29 5. .9 .52 ------349 71 61 86 276 306 185 5. V 3 3 368 ,L 59 86 291 304 185 31 6.4 .15 57 290 311

HE AN 5 5.9 5.52 12.1 966 567 256 109 6C.8 164 322 260 6. 86 291 328 300 HIM 5. 0 0 0 320 165 57 46 75 304 185

7,800 MIN 0 AC-FT 161,100

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1973 MAR APR MAY JUN JUL

1 191 151 5 .96 18 2 191 143 6 1: .74 12 44 46 79 17 > 96 9.4 9.0 4 190 156 1 . 6 .70 16 41 45 79 1 < 94 8.5 5 191 155 3 2 .70 b.t 42 71 80 1 I 93 8.5

6 191 70 4 2. .68 4. 42 06 82 1 92 8.5 7 191 1C 4 9. .70 4. 42 06 83 1 44 7.8 8 191 10 4 a. .70 4. 42 06 78 I 55 6 9 191 13 9 9. 1.9 4. 42 05 85 18 55 0 10 191 28 .8 5. 11 4. 43 05 83 18 54 2

11 191 28 3. 6.7 4. 44 15 82 18 54 7 12 191 28 . 2. 3.4 4. 43 40 82 18 54 4 13 191 28 2. 2.0 4. 44 57 83 18 66 5 14 189 14 2. 1.9 4. 4$ 66 82 18 72 5 15 190 6.0 2. 1.9 4. 44 78 80 19 72 5

16 191 6.D 4. 1.9 4. 34 81 76 19 73 4 17 191 6.D . 2. 1.9 4. 29 80 79 19 73 4 18 191 6.0 ' 2. 1.7 7. 44 80 78 19 74 3 19 190 6.C 1.5 3. 44 78 70 19 74 2 20 190 30 . 1. 1.3 3.

21 193 52 » 1. 1.2 3. 44 78 76 19 T 76 6 22 146 53 1. 1.2 3. 45 78 75 19 I 77 2 23 116 53 1 . 1.2 3. 45 78 74 20 ) 78 1 24 116 53 1. 1.0 3. 45 78 75 19 78 1 25 106 52 1.

26 116 52 I. .96 3. 45 75 75 19 r ao 9 27 106 52 1. .96 3. 45 75 77 19 I 77 8 28 117 53 1. 32 3.C 45 75 77 19 ! 76 29 117 53 6 3.f 30 97 53 4 3. 31 110 6 3. 76 - 19 r 75

MEAN 166 52.2 3 . 2. i5 2.95 5.2 » 42.3 41 78 18 97.1 2.6 MAX 193 156 * 9 4 32 1 46 81 85 20 ) 197 75 7.8 130 SANTA CLARA RIVER BASIN

11110500 HOPPER CREEK NEAR PIRU, CALIF.

DRAINAGE AREA.--23.6 sq mi.

PERIOD OF RECORD.--October 1930 to September 1932, October 1933 to September 1936, October 1937 to September 1970.

590 ft (from topographi ap). AVERAGE DISCHARGE.--38 years, 5.63 cfs jcre-ft per year); median of yearly mean discharges, 2.2 cfs (1,600

EXTREMES.--Ma and minimums (discharge econd, gage-height'in feet).

Armual ma xi muiia discharjje (*) imd peak di schar;>es above base (150 cfs, revis ed), wate: years 1966-70

Date Time Disch. G.H. Date Time Disch. G.H. Date isch. G.H. Nov. 16, 1965 2130 852 4. 50 Mar. 12, 1967 1700 595 3.43 Jan. 21. 1969 0600 1,770 5.83 Nov. 25, 1969 0700 8,400 a!2.72 Dec. 29, 1965 1530 *3,000 6.43 Apr. 18, 1967 1230 358 2.87 Feb. 6, 1969 0400 1,960 7.68 Feb. 6, 1966 1130 170 3.48 Apr. 21, 1967 2130 454 3.11 Feb. 25, 1969 0100 4,600 a!2.3 Nov. 7, 1966 0830 474 4.68 Nov. 20, 1967 0530 *450 3.45 Feb. 10, 1970 261 7.10 Dec. 3, 1966 0030 684 4.62 Nov. 30, 1967 0730 289 3.12 Feb. 28, 1970 *800 7.98 Dec. 6, 1966 1600 *4,450 6.40 Mar. 7, 1968 2200 214 3.00 Mar. 4, 1970 194 6.45 Jan. 22, 1967 1300 1,090 4.41 Jan. 24, 1967 1530 1,650 4.85 Jan. 19, 1969 2000 600 4.09 rom floodm flow fo od of record: Maximum discharge, 8,400 cfs Jan. 25, 1969 (gage height, 12.72 ft, from floodmark), fr it ing cur >nths in most years. REMARKS.--No regulation above station. Some pumping along stream for irrigat COOPERATION.--Records furnished by Ventura County Flood Control District and iewed by Geological Survey. REVISIONS. --IVSP 1715: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY JUN

1 0 B 6.2 3- .C .40 .10 2 0 6 5.7 3. .0 .40 .13 3 0 . 4 5.3 3. ..8 .30 .10 4 c 3 4.5 3. .6 .30 0 5 0 2 4.1 3- .5 .30 0 6 0 11 70 3. .5 .20 0 7 0 10 18 3. .4 .20 c 8 0 9.6 9.0 3. .4 .20 0 9 ^ 9.0 6.2 3. .4 .30 0 li c 8.4 4.9 3. .4 .40 0 11 5 7.8 4.1 3. .4 .30 0 12 c 7.8 3.8 3. .4 .20 0 13 0 7.8 3.8 3, .4 .20 0 1* 0 7.2 3.8 3. .2 .20 0 15 45 7.2 3.B 3- .2 .20 0 16 226 7.2 3.8 3. .0 .20 0 17 381 7.2 3.8 3. .0 .20 0 IB 60 6.7 3.8 3 , .4 .20 0 19 17 6.7 3.8 3. .4 .10 0 20 3.8 .B 6.7 3.8 3. .2 .10 c 21 1.6 .8 6.2 3.5 3< .2 .10 0 22 429 .8 6.2 3.5 2. .0 .10 0 23 238 .8 6.2 3.5 2. .90 .10 0 24 443 .5 6.2 3.5 2 . .60 0 0 25 17 .5 5.7 3.5 3. .60 0 0 26 15 .5 5.3 3.5 3. .70 .10 0 27 12 .2 5.3 3.5 2. .70 .10 0 28 8.4 .2 4.9 3.5 2. .60 .10 0 29 6.2 1.11 4.9 ...... 2 B .60 .10 0 30 5.7 7 44 ______2. .60 .10 0 31 11 .10 TOTAL J 1,908.7 1,31 .2 299.2 200.2 94. 36.50 5. BO .30 MEAN 3 63.6 4 .5 9.65 7.15 3.0 1.22 .19 .010 MAX 0 443 1, 10 44 70 3. 2.0 .40 .10 MIN 0 0 .2 4.9 3.5 2, .60 0 0 AC-FT a 3,790 2, 10 593 397 IB 72 12 .6 90 SANTA CLARA RIVER BASIN

11110500 HOPPER CREEK NEAR PIRU, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 196?

NOV DEC JAN FEB MAK APR MAY JUN JUL

0 0 .9 .8 16 18 6.2 .1 .8^ .20 17 .9 ;J .8 25 17 6.0 .0 .80 .80 0 211 .9 .1 .8 14 16 S.8 .0 .80 .80 C .60 .9 8 .8 32 16 5.6 .B . B; .63 0 197 9 .8 .8 24 15 5.4 .0 .73 ,6v. 0 905 .6 .5 .8 10 14 S.2 .0 C .60 195 74 .3 , 2 .8 28 14 5.1 .8 . 0 .50 6.7 24 0 .2 .8 14 13 5.2 .8 . ; .40 .50 15 .0 2 .0 9.0 13 5.2 .7 0 .40 .10 11 .0 .2 .0 7.0 13 5.1 .7 0 .50 3 9.8 .0 .2 .2 59 12 4.9 .7 . C .40 0 9.8 .0 .2 32 24 12 4.9 .6 . 0 .40 3 9.0 . 8 .9 18 17 11 4.5 .5 . ;. .53 0 8.2 .8 .9 5 13 10 3.B ,5 ; .60 0 7.4 .6 .6 1 0 6.7 .6 .6 1 7.8 8. 3.0 .4 . 0 .50 3 6.1 .6 .6 1 9.0 8. 2.8 .4 f .60 3 5.8 .4 .6 1 104 7. 2.7 .4 . C .60 0 5.5 .4 . 3 .0 54 7. 2.4 .3 0 .70 5.6 5.2 ,4 .0 .8 37 6. 2.3 .2 . 0 .63 1.6 5.2 .4 0 .0 138 6. 2.2 .2 Z .60 .90 5.2 ?4 .0 .7 137 6. 2.3 .1 C .6C, 5.2 2 .8 .4 51 6. 2.3 .0 . C .60 j 5.2 46 .6 .4 42 6. 2.3 .0 0 .70 0 5.2 -. 7 f .4 32 6. 2.4 .90 0 .80 0 5.2 2 .2 .1 27 6. 2.4 .80 0 .80 C 4.9 1 .0 .8 24 6. 2.2 .80 0 .80 0 4.9 .0 .S .8 21 6. 2.2 .80 0 1.0 C 4.9 .5 21 6. 2.2 .80 a .90 C 4.9 ...... 5 20 6. 2.2 .80 0 .90 4.9 6.

7.01 51.1 3 .4 5. 01 24.7 34.2 10.1 3.73 1.43 ' .59 .62 195 905 69 7.4 329 138 18 6.? Z.I .8C 1.0 0 0 .4 3.8 3.8 7.8 6.2 2.2 .80 .20 .20 417 3,143 1,S

WTR YR 1967 TOTAL 5,208.00 MEAN 14.3 MAX 905 MIN 0

DISCHARGE, IN CUBIC FEET PER SECOND, KA7ER YEAR OC70BER 1967 TO SEPTEMBER 1968

NOV DEC JAN FEB MAR APR MAY JUN JUL

.20 .9 .9 .8 .4 8 .60 .10 .20 .0 .9 .6 .4 8 .70 .10 .30 .6 .8 .6 .2 .70 0 .40 .2 .8 .5 .1 .80 .10 .40 .0 .8 .5 .1 .90 .10

.5C .6 .8 .5 .2 .90 .10 .50 .6 is .5 2 .80 .10 .50 .50 .4 .5 7 .90 .10 .60 .50 0 .8 .6 .1 .10 .60 .5C .0 .8 . I 0 .1 0

.SO .6 . o 0 .1 0 .50 .C .6 .8 .1 0 .50 .9 .8 , 4 .0 .1 0 .50 .4 .8 .1 .6 .0 C .50 .9 .8 . 6 .0 .90 0

.50 .9 .8 .2 .6 .80 C .50 .9 .8 .9 , ^ .70 0 .60 .8 .2 .0 .60 C .5 .0 .9 .50 0 .4 .9 .8 .40 C

6 .6 .6 .60 0 ,2 .6 .5 .73 0 .9 .0 .5 .5 0 .60 0 .6 .0 .4 .5 0 .50 0 .8 .0 .4 .5 0 .40 0

.2 .0 .4 .4 0 .30 0 .8 .9 .5 .2 0 .20 0 .8 .9 .4 .1 00 0 .6 .8 . .2 .1 03 0 .8 . .1 0 .10 0 .8

12.10 .60 9 .0 5 5 .8 16 .9 45.10 20.30 .80 .39 .80 139 .9 .4 75 8.4 1.1 .10 .20 .8 .2 .1 .50 0 0 922 84 i 119 23 89 40 1.6 SANTA CLARA RIVER BASIN

11110500 HOPPER CREEK NEAR PIRU, CALIF.--CONTINUED

DAY OCT NOV DEC JUN JUL AUG SE

1 0 0 0 .21 40 80 16 7.6 .6 2.9 1.6 .9 2 0 0 0 .21 35 76 15 7.6 .8 2.9 1.7 .9 3 0 0 0 .18 30 66 15 7.7 .6 2.9 1.7 .9 4 0 0 0 .15 20 67 14 7.7 .7 3.0 1.7 .9 5 0 c 0 .16 50 62 14 7.7 .7 3.0 1.6 .9 6 0 0 0 .18 452 56 13 7 0 0 U .21 80 50 12 7.5 4.6 3.0 1.6 .6 e 0 0 C .21 53 47 12 7.3 4.6 2.9 1.5 .6 9 0 0 0 .21 46 44 11 7.0 4.6 2.7 1.5 .6 10 0 0 0 .21 41 41 11 6.8 4.6 2.6 1.5 .9 11 0 0 .20 .21 35 39 10 6.6 4.6 2.4 1.4 .9 12 0 0 0 .21 34 36 10 6.3 4.5 2.3 1.4 13 0 0 C .67 29 34 10 6.2 4.5 2.1 1.4 14 .45 0 .10 28 25 32 9.1 6.1 4.4 2.0 1.4 15 0 .35 .52 2.2 34 30 9.0 5.9 4.4 2.0 1.4 1. 16 0 0 .40 1.2 31 27 6.9 5.6 4.3 2.0 1.4 17 0 0 .16 .90 26 25 6.6 5.7 4.3 2.0 1.4 18 0 .15 2.2 26 24 6.7 5.6 4.2 1.9 1.4 19 0 .15 230 27 24 8.6 5.4 4.1 1.9 1.4 20 0 0 .21 119 27 23 8.5 5.4 4.0 1.9 1.3

21 0 0 .IB 734 26 22 6.4 5.3 4.0 1.9 1.3 22 0 0 .18 leo 31 21 6.3 5.3 3.9 1.6 1.3 23 0 0 .12 108 494 20 8.2 5.2 3.6 1.8 1.2 24 0 .12 369 900 20 8.1 5.2 3.7 1.6 1.2 25 c 0 .54 2, 400 If 500 19 6.0 5.1 3.6 1.8 1.1 26 0 D 2.4 1, 660 420 16 7.9 5.0 3.4 1.9 1.1 27 0 0 .82 140 160 16 7.B 5.0 3.3 1.9 1.1 26 0 .59 60 90 17 7.7 5.0 3.2 1.9 1.1 29 0 0 .40 55 17 7.6 4.9 3.0 1.9 1.1 30 0 G .40 50 17 7.6 4.9 2.9 1.9 1.0 .5 31 0 .28 47 16 1.8

MEAN .015 .012 .26 200 170 35.2 10.1 6.11 4.17 2.25 1.37 .9 MAX .45 .35 2.4 2i400 1,500 80 16 7.7 4.6 3.0 1.8 1. M1N 0 0 0 .15 20 16 7.6 4.9 2.9 1.8 1.0 .5 AC-FT .9 .7 16 138 85 5

DISCHARC E, IN CUBIC FEET PER SECOND t .MATER YEAR OCTOBER 1969 TO SEPTEMBER 197C DAY OCT NOV JUN JUL AUG SE

1 .50 .73 .91 1.1 .72 142 1.7 1.0 .26 .02 .01 2 .49 .70 .91 1.1 .65 95 1.7 .94 .18 .02 .01 3 .48 .70 .93 1.1 .72 7.1 1.7 .94 .26 .01 .01 4 .47 .70 .97 1.0 .80 36 1.5 .83 .31 .31 .01 5 .47 .70 1.0 1.0 .80 38 1.4 .73 .36 .01 .01 6 .46 I. 6 1.1 1.0 .BO 7.9 1.4 .83 .42 .01 .01 7 .46 1.6 1.1 1.0 .72 3.6 1.5 .73 .42 .01 0 e .46 1.2 1.1 1.0 .72 2.4 1.7 .73 .49 .02 0 9 .52 1.1 1.2 1.1 .07 0 10 .56 1.0 1.2 1.1 55 2.0 1.6 .64 .49 .06 0 11 .59 1.0 1.2 1.1 28 0 12 .63 1.0 1.2 l.l 2.1 1.6 1.6 .56 .49 .04 0 13 .66 1.0 1.2 1.1 2.1 1.6 1.6 .49 .56 .04 0 14 .69 1.0 1.2 1.1 2.1 1.9 1.6 .42 .42 .03 0 15 .73 1.0 1.2 l.o 2.1 t.9 1.6 .26 .42 .02 0 16 2.1 2.0 1.7 .26 .42 .02 0 17 .79 .99 1.2 1.6 2.0 2.0 1.7 .22 .42 .01 0 IB .83 .98 1.2 1.2 1.7 2.0 1.6 .26 .31 .01 0 19 .86 .97 1.3 1.1 1.6 0 20 1.8 1.4 .31 .IB .01 0

21 .88 .96 1.3 .88 1.2 1.6 1.4 .36 .15 .01 0 22 .88 .95 1.3 .88 1.1 1.5 1.2 .31 .11 .01 0 23 .87 .95 1.3 .68 .88 1.5 1.2 .36 .07 .01 0 24 .87 .95 1.3 .88 .80 1.6 1.0 .36 .05 .02 0 25 .87 .95 1.3 .88 .65 1.6 .94 .36 .04 .02 0 26 .66 .94 1.3 .72 .58 2.0 1.0 .49 .03 .02 0 27 .86 .94 1.2 .72 .36 1.9 1.2 .64 .03 .02 0 28 .63 .93 1.2 .72 247 1.7 1.4 .64 .04 .01 0 29 .61 .93 1.2 .65 1.8 1.2 .49 .03 .01 0 30 .78 .92 1.2 .72 2.0 1.2 .36 .03 .01 0 31 .75 1.1 .72 TOTAL 21.57 29.54 36.32 34.73 361.62 375.6 43.34 16.34 8.23 .62 .06 C MEAN .70 .98 1.17 1.12 12.9 12.1 1.44 .53 .27 020 .002 C MAX .68 1.8 1.3 5.2 247 142 1.7 1.0 .56 .07 .01 C MIN .46 .70 .91 .65 .38 1.5 .94 .22 .03 .01 0 C 86 32 16 1.2 .1 0

HIN .15 AC-FT 25,560 WTR YR 1970 TOTAL 927. 97 MEAN 2.54 MAX 247 MIN 0 AC-FT 1,840 NOTE. NO GAGE-HEIGHT RECORD OCT. 1 TO JAN. 14. SANTA CLARA RIVER BASIN 3g?

11111500 SESPE CREEK NEAR WHEELER SPRINGS, CALIF. LOCATION.--Lat 34°34'40", long 119°15'25", in SEWsSWt sec.30, T.6 N. , R.22 W. , Ventura County, on right bank at northeast of Wheeler Springs. DRAINAGE AREA.--49.5 sq mi. PERIOD OF RECORD.--January 1948 to September 1970. Monthly discharge only for January to July 1948 and yearly estimate for water year 1948 (incomplete), published in WSP 1315-B.

AVERAGE DISCHARGE.--23 years (1947-70), 10.7 cfs (7,750 acre-ft per year); median of yearly mean di 3.0 cfs (2,170 acre-ft per year). EXTREMES. --Maximums and minimums (discharge in cubic feet per second, gage height in feet), Annual maximurn discharge (*) and peak discharges above base (50 -cfs) , water yea rs 1966-70 Date Time Di sch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 16 , 1965 2400 1 ,840 8.48 Mar. 12, 1967 2200 350 5.28 Jan. 25, 1969 0800 *9,700 13.60 Nov. 24 , 1965 0230 2 ,940 9.10 Apr. 4, 1967 1900 293 5.13 Feb. 6, 1969 0300 770 6.34 Dec. 29 , 1965 1500 «3 ,320 9.42 Apr. 18, 1967 1400 173 4.53 Feb. 15, 1969 1500 130 4.52 Feb. 6 , 1966 1000 156 4.89 Apr. 21, 1967 2000 237 4.85 Feb. 24, 1969 2400 8,800 13.10 Apr. 5, 1969 1900 164 3.18 Nov. 7 , 1966 1600 736 6.27 Nov. 21, 1967 1315 *179 4.47 Dec. 3 , 1966 0100 741 6.28 Mar. 8, 1968 1030 52 3.49 Nov. 6, 1969 1330 S3 2.69 Dec. 6 , 1966 1700 *3 ,840 9.85 Jan. 9, 1970 2400 75 3.07 Jan. 24 , 1967 1600 467 5.62 Jan. 21, 1969 0430 6,650 11.82 Feb. 10, 1970 1900 88 3.15 Feb. 25, 1970 1500 765 5.70 Annuiil minimiJm daily di scha rge, water years 1966-70 Wtr yr Date Discharge Wtr yr Date Dis charge 1966 Oct. 1 to Nov. 8 , 1965 .10 1969 Oct. 1, 2, 9, 22, 23, 1968 .05 1967 Oct. 1-14, 1966 .30 1970 Sept.l 0-19, 19 70 .16 1968 Many days 0 P 9,700 cfs Jan. 25, 1969 (gage height, 13.60 ft) , from rating cu rve

REMARKS . --Rec records f 1966 -70 ar in reports of the (]eological Survey. REVISIONS (WATER YEARS).--WSP 1565: 1952. WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

1 .10 .10 30 90 20 10 3.0 .80 1.8 .30 2 .10 .10 27 80 19 10 3.0 .80 1. .30 3 .10 .10 24 70 19 9. 3.0 .80 1. .30 4 .10 .10 22 65 19 9. 3.0 .80 0 .30 5 .10 .10 21 60 20 9. 3.2 .80 0 .30 6 .10 .10 20 54 88 8. 3.2 .80 0 .30 7 .10 .10 19 47 52 8. 3.2 .80 0 .30 8 .10 .10 17 43 36 8. 3.4 .80 0 .30 9 .10 .20 17 39 30 8. 3.6 .80 0 .30 lj .10 .20 16 35 28 8. 3.6 .8C 0 .30

11 .10 .20 16 32 24 8. 3.4 .80 C .30 12 .10 .20 18 29 23 8. 3.0 .80 0 .30 13 .10 .20 16 27 21 8. 3.0 .80 0 .30 14 .10 3.6 15 25 20 8. 3.0 .70 C .30 15 .10 23 14 24 19 7. 3.0 .70 0 .30

16 .10 400 14 22 17 2.8 .70 0 .30 17 .10 4 5 12 21 17 2.8 .70 0 .30 18 .10 1 5 12 20 16 2.7 .60 0 .30 19 .10 1 0 11 20 15 2.5 .60 0 .30 20 .10 a 11 19 is 2.5 .60 0 .30 21 . 0 5 11 19 14 2.5 .60 0 .30 22 .05 9 12 18 14 2.5 .50 0 .30 23 .05 4 11 17 13 2.5 .50 . 0 .30 24 . 0 1,0 0 11 17 12 2.3 50 * 0 .30 23 .01 6 11 16 11 2.3 0 .50 0 .30 26 . 0 7 11 16 11 2.2 .80 .40 T) .30 27 . 0 5 10 16 10 2.2 .80 .40 0 .30 28 . 0 2 11 16 10 2.2 .80 .40 0 .39 29 . 0 3 1,650 16 2.3 .80 .40 0 .30 30 . 0 7 460 21 2.3 .80 .40 C .30 2.3 .40 0

MEAN . 0 131 85.5 32.7 21.9 7 6 4 \ 2.79 1.47 .65 5 .30 MAX .10 1,050 1,650 90 88 1 3.6 2.3 .80 1.8 .30 HIN .10 .10 10 16 10 2.2 .80 .40 .30 .30

CAL YR 1965 TOTAL 7.301.30 MEAN 20.0 MAX 1,650 MIN .10 >F7 14,480 :-FT 17,360 SANTA CLARA RIVER BASIN

11111500 SESPE CREEK NEAR WHEELER SPRINGS, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

DAY QCT NOV DEC JA JUN JUL AUG SEP 1 .30 .70 1.0 6. 29 8. 24 66 14 3.9 .9 .70 ? .30 .7C 17 6. ?6 7. 27 61 13 3.7 .9 .90 3 .30 .7C 165 6. 22 7. 32 57 13 3.5 .8 .80 4 .30 .70 3.0 5. 20 .7. 121 55 12 3.2 .6 .70 5 .30 .70 218 5. 19 6. 105 51 12 3.5 .6 .70

6 .33 1.1 1,590 5. 6 6. 78 47 11 3.5 .6 .70 7 .30 189 2C7 5. 5 6. 95 44 11 3.2 .6 .70 8 .33 11 59 5. 4 6. 62 42 10 3.0 .6 .70 9 .30 3.6 32 5. 3 6. 70 39 10 3.0 .6 .70 10 . 30 2.0 22 5 *

11 .30 t.5 16 4. 12 38 78 35 9.4 2.8 .3 .70 12 ' .30 1.0 15 4. 11 269 71 32 9.0 13 .30 .90 14 4. 11 23 70 30 9.0 2.8 .2 .60 14 .30 .80 14 4. 11 13 65 28 6.6 2.8 .2 .60 15 .40 .80 14 4. 11 9 63 27 8.3 2.8 .2 .60 16 .40 .70 13 4. 1C 8 56 25 7.6 2.6 .2 .60 17 .40 ,6C 12 4. 4.8 6 54 23 .2 2.8 .2 .60 18 .40 .60 11 4. 9.4 58 115 21 .2 2.6 .2 .60 19 .40 .50 11 4. 9.4 46 109 20 .9 2.6 .2 .60 20 .40 .50 10 4. 9.: 39 95 19 .6 2.6 .2 .6u 21 160 17 2.4 .2 .70 22 .50 5.C 9.0 2 0 8.3 32 171 17 .7 2.4 .2 .80 23 .53 J.C 8.3 5 8.3 28 152 17 .7 2.4 .2 .80 24 .50 2.C a,r 30 8.3 25 129 17 .5 2.4 .2 .60 25 .50 l.C 7.6 2 0 11 24 118 16 .2 2.3 .2 .90 26 .50 .90 7.6 9 111 27 .60 .80 7.2 9 9.S 20 103 15 .7 2.4 .2 .90 28 .60 .70 6.9 2 8.0 19 102 15 .4 2.4 .1 .90 29 .60 6.6 8 82 14 4.2 2.3 .90 .90 3; P .5C 6.6 8 17 73 14 4.2 2.3 60 .90 31 .70 6.6 6 25 14 2.1

MEAN 12.9 45.2 .31 .73 MAX .70 189 1,590 35 ) 29 269 171 66 14 3.9 1.9 .90 MIN .30 .50 l.u 4. ) 8.0 6.6 24 14 4.2 2.1 .70 .60 ,310 1,850 486 172 43

AC-FT 19,200

NOTE. NO GAGE-HEIGHT RECORD JAN. 2-24.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

1 .90 B c 0 2.3 .4 1.8 2.4 .7 .6 .60 .20 .10 .10 2 .80 C 1.9 .4 1.8 2.4 .2 .6 .60 .10 .1C .10 3 .80 0 1.9 .4 1.8 2.4 .9 .4 .60 .10 .10 .10 4 .80 0 1.8 .6 1.6 2.4 .2 .4 .60 .10 .10 .10 5 .80 0 1.8 .6 1.6 2.4 .0 .4 .60 0 .1C .10 6 .80 . 1.8 .6 1.6 2.4 .6 .4 .60 0 3 .10 7 .6C 1.8 .6 1.6 5.1 .6 .4 .60 0 0 .10 8 .60 1.8 .6 1.6 28 .6 .4 .60 C 0 .10 9 .70 1.8 .6 1.6 8.8 .6 .4 .60 000 1C .70 1.8 .6 1.6 5.6 .6 .4 .60 0 0 0 11 .70 1.8 .6 1.6 4.9 .4 .4 .50 000 12 .70 1.8 .6 1.6 4.4 .4 .6 .50 000 13 .60 . 1.4 .6 2.6 5.5 .3 .8 .40 0 .10 C 14 .6T 1.4 .6 2.4 4.7 .3 .8 .40 0 .10 0 15 .60 1.3 .4 2.3 4.4 .3 .6 .40 0 .10 0

16 .60 1.2 .4 2.1 4.4 .3 .4 .30 000 17 .60 1.1 .4 3.0 4.2 .3 .4 .30 0 0 C 18 .60 . 1.4 .4 2.8 4.2 .3 .3 .30 0 0 C 19 .60 1 1.4 .4 2.6 3.9 .3 .3 .30 0 .10 0 20 .60 1 1.4 .4 2.4 3.9 .3 .3 .30 0 .10 0 21 .60 6 1.4 .6 2.3 3.7 .3 .2 .30 0 .20 0 22 .60 1.6 .6 2.3 3.7 .3 .4 .30 0 .20 0 23 .7C 1.6 .6 2.3 3.7 .3 .4 .30 0 .1C 0 24 .70 . 1.6 .6 2.3 3.5 .3 .3 .40 .10 .1C 0 25 .70 1.6 .8 2.3 3.5 .1 .2 .30 0 .10 0 26 .80 1.6 .8 2.4 3.2 .9 .1 .30 0 .10 0 27 .60 . 1.6 .9 2.4 3.2 .8 .1 .20 000 23 .60 1.4 .9 2.4 3.0 .6 .1 .10 000 29 .90 . 1.4 .8 2.4 2.6 .8 .80 .20 .10 0 0 30 .90 . 1.4 .8 2.6 .6 .80 .20 .10 0 .10 31 .90 1.4 .60 .10 0

MAX .90 5 2.3 .9 3.0 26 .7 1.8 .60 .20 .20 .10 MIN .60 iC 0 1.1 .4 1.6 2.4 .8 .60 .10 000 AC-FT 45 2 5 98 98 121 282 51 82 24 1.8 3.6 1.6

MIN .60 AC-FT 14,130 SANTA CLARA RIVER BASIN

11111500 SESPE CREEK NEAR WHEELER SPRINGS, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET'PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER

JUN

1 .05 .09 .68 l.C 66 150 39 22 8.0 2.3 2.8 2 .05 .10 .68 .86 64 130 39 22 7.6 2.3 2.8 3 .06 .10 .68 .86 57 120 53 21 7.2 2.3 2.7 4 .06 .11 .68 .68 54 110 37 21 6.9 2.3 2.7 5 .06 .13 .68 .68 65 105 67 20 6.6 2.1 2.7

6 .06 .15 .68 .62 347 100 73 9 6.6 2.6 7 .06 .15 .68 6.6 2.U 2.6 8 .07 8 6.9 2.8 2.6 9 .C5 .19 .68 .62 100 92 41 7 7.2 2.8 2.5 1C 89 90 40 6 7.6 2.8 2.5

11 .06 .23 83 89 34 16 7.6 3.7 2.S 12 86 31 15 7.2 5.2 2.4 13 .06 .26 .74 .74 70 84 30 15 6.6 5.2 2.4 14 .13 .29 .80 1.0 62 80 3C 14 6.0 4.7 2.3 15 .08 .42 1.5 .74 92 76 30 14 6.3 4.4 2.3

16 .09 .35 l.l .74 81 73 30 14 6.6 4.2 2.3 17 .09 .32 29 14 6.6 4.2 2.2 18 .09 .32 1. 1 13 2.2 19 .C9 .32 1.0 286 65 77 29 13 6.0 3.9 2.2 20 .09 .32 -.95 416 58 73 28 12 5.7 3.7 2.1

21 .07 .35 .86 2,430 55 77 27 11 4.9 3.7 2.1 22 .05 .35 .95 195 60 70 27 12 3.9 3.7 2.1 23 .05 .35 .95 81 87 64 27 11 3.5 3.5 2.1 24 11 3.0 3.5 2.1 25 .08 .38 1.3 11 2.B 3.2 2.1 26 .07 .47 1.3 278 9CO 53 25 11 2.8 3.2 2.1 27 .08 .52 1.0 97 40C 49 25 10 2.6 3.0 2.1 28 .C7 .57 1.1 90 20C 47 24 10 2.4 3.C 1.9 29 .08 .62 1.1 83 44 24 9.8 2.3 3.0 1.9 30 .09 .62 1.1 2.8 1.9 31 .09 l.C 71 41 8.6 2.8 1.9

MAX .13 8.0 5.2 2.B MIN 41 23 8.6 2.3 2.1 1.9 AC-FT 4.4 18 MIN 0 AC-FT 844

DISCHARGE , IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMf ER 197J

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG S

2.8 1.5 5.0 2.5 4 1 7.1 4.5 2.2 1.0 .43 1.4 3.1 1.5 5.0 2.3 1 4 7.1 4.5 1.9 .86 .43 1.4 3.1 1.5 4.1 2.3 2 7.1 4.5 1.9 .88 .43 1.4 3.3 1.5 3.8 2.0 6 6.7 4.1 1.9 .75 .43 1.5 4.1 1.5 3.6 1.8 8 6.7 4.1 1.9 .75 .43

1.5 35 1.5 3.1 1.8 5 6.7 4.1 1.9 .75 .43 1.5 15 1.8 3.1 1.5 2 6.2 4.1 1.9 .75 .43 8 1.5 8.0 2.0 3.1 1.4 4 6.2 4.1 1.9 .75 .43 9 1.5 4.1 2.3 IB 11 9 5.8 3.8 i.,2 .75 .35 . 10 1.5 3.1 2.3 17 38 3 5.8 3.8 2.2 .75 .35 11 1.5 2.0 2.0 7.5 18 8 6.2 3.8 12 1.5 1.5 6.7 3.8 13 1.5 1.4 2.0 5.0 7.5 1 6.7 3.8 2.6 .75 .35 14 1.5 1.3 2.0 4.1 6.2 0 6.7 3.8 2.6 .64 .35 15 1.5 6.2 2.0 3.8 5.4 8 6.7 3.5 2.4 .64 .35

16 1.5 6.2 2.3 6.7 5.0 7 6.7 3.2 2.2 .64 .35 17 1.5 2.0 2.3 5.8 5.0 5 6.7 2.9 1.9 .64 .35 18 2.0 6.2 2.9 1.7 .64 .35 19 1.8 20 1.8 2.3 2.3 3.6 5.0 3 5.6 2.9 1.3 .64 .28

21 l.B 2.3 2.3 3.6 4.5 12 5.6 2.9 1.2 .64 .28 22 2.0 2.0 2.3 3.3 4.1 12 5.6 2.9 1.0 .53 .28 2.9 1.0 .53 .28 23 2.0 2.01.9" 2.0 3.3 3.8 11 5.2 24 2.0 2.0 3.3 3.6 10 25 1.0 .43 .28 26 .43 .28 27 2.0 1.5 5.8 3.1 3.8 8.4 4.B 2.6 1.0 .43 .28 28 2.0 1.5 5.8 3.1 266 8.0 4.8 2.6 1.0 .43 .28 29 2.3 1.5 5.0 3.1 7.5 4.8 2.4 1.0 .43 .28 30 2.3 1.5 4.5 2.8 7.5 4.8 2.2 1.0 .43 .21 31 2.5

MEAN 1.71 4.21 2.51 4.88 15.4 42.3 5.95 3.35 1.67 .64 .34 MAX 2.5 35 5.8 18 266 441 7.1 4.5 2.6 1.0 .43 MIN 1.4 1.3 1.5 2.8 1.4 7.5 4.5 2.2 1.0 .43 .21

MIN .16 AC-FT 4,990 SANTA CLARA RIVER BASIN

11113000 SESPE CREEK NEAR FIUMORE, CALIF. County, right bank

DRAINAGE AREA.--251 sq mi. PERIOD OF RECORD.--September 1911 to September 1913, October 1927 to September 1970;

580 ft (from topographic map). See WSP 1928 for history of changes prior to Jan. AVERAGE DISCHARGE.--Creek only, 45 years, 105 cfs (76,070 acre-ft per year); median c 51 (80,420 acre-ft per year); median o.f yearly mean discharges, 46 cfs (33,300 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (1,300 cfs), water years 1966-70 (creek only)

Date Time Disch. G.H Date Time Disch. G.H. D ate Time Disch. G.H. Nov. 16, 1965 2300 11,600 10.8 9 Jan. 24, 1967 1500 9,110 9.77 J an. 25, 1969 0900 60,000 20.80 Nov. 24, 1965 0600 19,600 13.4 0 Mar. 13, 1967 0030 6,050 8.75 F eb. 6, 1969 0400 14,400 16.50 Dec. 29, 1965 1500 *21,600 13.9 5 Apr. 21, 1967 2400 3,100 7.50 Feb. 25, 1969 0400 45,000 a24.95

Nov. 7, 1966 1600 1,720 6.6 4 Nov. 21, 1967 1200 *1,940 6.70 F eb. 10, 1970 2000 3,300 15.60 Dec. 3, 1966 0200 4,440 8.1 7 F eb. 28, 1970 1900 *8,800 16.20 Dec. 6, 1966 1600 *21,600 13.4 0 Jan. 21, 1969 0600 38,000 17.00 Miar. 4, 1970 2000 2,910 14.25 a From debris wave. NOTE. --Maximum combined discharg e and peak discharge s above base are the same as those listed for creek only. Ann -70 Creek onl y Combined Wtr yr Date Discharge Date Discharge 1966 Oct. 1-3, 20-30, 1965 .10 Oct. 3, 2 4-27, 1965 2.9 1967 Oct. 14-20, 1966 .20 Oct. 19, 1 966 4.8 1968 Aug. 1 to Sept. 30, 1968 .10 Sept. 10-12 , 1968 3.9 1969 Several days .10 Nov. 15, 1 968 1.2 1970 Sept. 1-3, 1970 .42 Sept. 22, 1 970 5.5

Period of record: Maximum discharge (creek only), 60,000 cfs Jan. 25, 19 69 (gage height, 20. 80 ft) , from height,, 24.95 ft Feb. ";, 1969 jmbined) : Maximum dis- charge,, 60,000 cfs Jan. 25 , 196 m daily, 1. 1 cfs J uly 31, Aug . 2, 1951. REMARKS . - - age-height rec t 9l

REVISIONS (WATER YEARS). --WSP 901: 1938-39 . WSP 1315 -B: 1935(M), 1939-40-CM). WSP 1928:: Drainag

DISCHARGE, IN CLIBIC FEET PER SECOND, MATER YEAR OCTOBER 1965 TO SEPTEMBi ER 1966 DAY DCT NOV DEC JUN JUL Aue SEP 1 .10 .20 298 .80 .30 .20 2 .10 .20 264 752 168 91 44 22 9.6 .80 .30 .20 3 .10 .20 242 655 156 89 44 22 9.2 .80 .30 .20 4 87 42 22 8.8 .60 .30 .20 5 .20 .20 207 484 15C 85 41 22 8.4 .60 .30 .20 6 83 40 20 8.0 .60 .30 .20 7 .20 .20 186 405 375 81 39 20 7.2 .60 .30 .20 8 9 .20 .20 174 335 242 78 40 20 7.2 .50 .30 .20 10 .20 .20 171 306 201 76 40 20 6.9 .50 .30 .20

11 .20 .20 162 278 186 74 38 22 6.6 .50 .30 .20 12 .20 13 .20 .20 162 226 165 71 36 22 5.8 .50 .30 .20 14 .20 16 .30 .20 15 .20 390 148 .20 16 .20 3,800 142 195 142 68 31 21 4.2 .40 .30 .20 17 .20 6.130 138 183 138 65 31 20 4.0 .40 .30 .20 18 .20 2,500 132 180 132 60 30 19 3.8 .40 .30 .20 19 .20 1,050 .20 20 .10 295 125 168 125 58 29 17 3.2 .30 .30 .20

21 .10 122 123 162 121 58 29 14 4.2 .30 .30 .20 22 .10 4,900 121 156 114 56 28 14 1.7 .30 .30 .20 23 .10 4,740 116 153 112 55 28 14 1.6 .30 .30 .20 24 .10 9,540 112 1*8 107 53 27 14 1.5 .30 .30 .20 25 .10 2.100 112 142 105 53 26 14 1.4 .30 .30 .20 26 .10 1,040 110 27 .10 664 107 138 99 51 22 14 1.2 . .30 .20 .20 28 .10 502 107 29 .10 405 11, 900 130 48 22 13 .90 .30 .20 .80 30 .10 340 3, 790 .20 .80 31 . 20 1 , 430 218 45 10 .30 .20 TOTAL 4.80 38,536.60 21, 625 9,114 4,659 2,075 993 563 144.30 13.80 8.70 7.20 MEAN .15 1,285 698 294 166 66.9 33.1 18.2 4.81 .45 .28 .24 MAX 950 424 93 45 22 10 .80 .30 .80 MIN .80 .30 .20 .20 AC-FT 9.5 76,440 42, 890 18,080 9,240 4.120 1,970 1.120 286 27 17 14 SANTA CLARA RIVER BASIN

11113000 SESPE CREEK NEAR FILLMORE, CALIF.--CONTINUED

DISCHARGE! IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 JUL 1 .60 .30 21 58 236 68 227 450 102 40 13 2 .40 .30 84 38 12 3 .30 .40 1 12 4 183 11 5 11 6 87 33 11 7 .30 774 2 85 33 11 8 .30 334 621 53 145 60 456 332 83 30 9.4 9 .30 76 38C 53 140 60 385 336 81 28 9.4 1C .30 43 9.0 11 .30 32 246 51 122 91 646 2B8 76 24 8.6 12 .30 25 216 49 120 2, SCO 480 264 73 23 7.4 13 .30 21 186 9 1?2 3,220 406 242 71 22 7.4 14 .20 19 155 9 114 1,310 385 228 69 21 7.1 15 20 18 138 8 110 754 370 216 68 21 6.8 16 20 17 129 8 1C6 594 340 210 65 22 6.4 17 .20 16 6.1 18 20 14 5.8 19 .20 12 106 47 94 350 9*5 183 59 18 5.8 20 .20 31 10C 58 17 5.5 21 30 4* 94 47 88 268 1,390 160 55 15 5.5 22 30 34 90 1,160 83 250 1,820 150 54 5 5.2 23 30 28 4 5.2 2* 30 26 81 77 51 6 .0 25 30 22 77 It 540 85 195 780 131 49 6 .0 26 30 21 74 637 81 177 724 122 48 6 .0 27 30 19 71 444 73 162 732 118 47 6 .8 28 30 19 67 355 68 155 658 118 46 15 .8 29 .30 20 61 304 145 582 114 44 14 .8 30 30 19 14 .8 31 59 264 223 104 14 .5

MEAN 29 56.2 658 315 123 415 628 237 68.1 22.7 7.43 5 MAX 13 MIN .20 .30 21 47 68 60 227 104 43 14 4.5 AC-FT 457 MIN .2C AC-FT 78,660 HTR YR 1967 TOTAL 77,508.90 MEAN 212 MAX 10f400 MIN .20 AC-FT 153,700

DAY 3CT NOV DEC JUN JUL AUG S 1 .4 .0 .10 2 .1 .0 81 37 36 36 49 4 1.8 .40 .10 .5 .0 .5 .C 58 35 35 34 35 4 1.2 .40 .10 .5 .0 .30 .10 6 .5 .0 51 .90 .30 .10 7 103 33 2 .90 .30 .10 8 .5 .0 48 35 34 530 32 2 .90 .30 .10 .8 .0 .90 .20 .10 13 .5 .0 44 35 36 127 28 12 1.0 .20 .10 11 .8 .8 41 35 35 110 28 12 .90 .20 .10 12 .8 .2 41 35 36 106 28 12 .80 .20 .10 13 .8 .1 40 12 .80 .20 .10 14 .8 .1 39 35 54 125 27 12 .80 .20 .10 15 .8 .5 .80 .20 .10 16 .5 .5 40 32 42 104 26 11 .80 .20 .10 17 .5 .0 41 32 66 96 26 11 .60 .20 .10 18 .8 .1 67 30 66 88 26 9.8 .50 .20 .10 19 .8 9 62 30 58 79 26 9.4 .50 .20 .10 20 .8 401 53 30 51 71 26 9.4 .40 .20 .13 21 .5 966 46 30 48 63 26 8.2 .40 .20 .10 22 .5 3*5 44 30 47 55 23 8.2 .40 .20 .10 23 .5 116 43 30 46 50 21 8.2 .40 .20 .10 24 .5 74 42 30 43 46 20 6.8 .40 .20 .10 25 .5 59 41 30 42 41 IB 6.4 .40 .20 .10 26 .5 50 41 30 42 37 IB 6.4 .40 .20 .10 27 .8 43 39 36 41 37 17 5.8 .40 .20 .10 28 .8 43 39 40 40 36 16 5.0 .40 .20 .10 29 .0 42 39 38 38 30 .3 338 .10 31 37 36 35 5.0 .20 . 10 7.40 3.10 3. 10.1 .81 .24 .10 MAX .4 966 129 40 67 530 53 14 2.3 .40 .1C MIN .5 4.8 37 30 34 34 14 4.8 .40 .20 .10 48 15 6.2 6

20,830 SANTA CLARA RIVER BASIN

11113000 SESPE CREEK NEAR FILLMORE, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 OCT JAN FEB 1 .10 .10 .30 8.0 25 12 2 148 69 46 25 11 4 .10 158 68 41 24 9.8 5 .10 .10 21 9.6 6 .10 7 a .10 .10 24 9.8 9 .1C .10 .20 6.0 988 884

11 .1C .20 6.0 98C 7 BO 3 IB 122 74 38 26 8.6 12 In .10 .20 6.0 948 716 3 22 120 74 44 27 8.6 13 .1C .1C .20 12 716 665 2 96 118 73 44 21 8.6 15 1.2 .80 9.2 22 832 558 2 16 114 68 37 15 8.6 16 .70 8.2 17 996 528 2 10 112 66 35 16 8.6 17 .80 .C 6.1 10 844 516 2 04 108 65 34 18 .4 18 .50 4.3 14 836 522 2 04 106 63 34 21 .4 2C .30 .0 3.5 4, 080 812 468 1 95 1C2 59 31 21 .4 21 .7C 4.2 17, 200 21 .4 22 98 58 28 21 .4 24 .10 .80 5.0 3, 410 19,710 468 1 92 55 28 20 .4 25 28 29, 22,600 434 1 74 88 54 28 19 .4 26 .10 85 53 27 19 .4 28 19 .0 29 .1C .30 12 4, 550 400 1 58 74 50 26 19 8.6 3C .10 .30 9.8 3, 410 :::::: 400 1 52 73 48 26 19 B.2

654 279.6 MAX 1.2 l.C 28 2 158 74 46 27 12 MIN .10 -1C 15 8.2

T 12,530

DISCHARGE , IN CUBIC FEET PER SECOND , WATER YEAR OCT08ER 1969 TO SEPTEMBER 1970 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

? 9.0 - 11 18 15 26 2,650 6C 32 11 .9 .76 .42 3 9.0 11 18 15

5 9. 0 11 .85 7.3 6 9.0 37 16 14 26 595 53 35 7.3 .5 .99 7.3 8 8.6 28 17 15 .99 9.6 9 9.0 24 17 24 125 327 52 33 8.2 1 .99 4.3

11 9.0 22 27 8.6 .1 .67 3.1 12 9.4 21 17 14 9.8 20 15 11 2C 14 31 66 150 43 24 9.6 .3 .58 .99 16 11 20 14 41 60 142 43 23 9.1 1.0 . 8 .67 18 12 20 14 39 51 118 43 23 9.1 .76 . 8 .85 19 12 20 14 34 48 108 42 23 9.1 .76 . 8 .85 20 12 20 14 31 43 100 42 23 8.6 .76 .0 .76

22 12 20 14 28 37 90 40 23 12 2C 14 27 32 86 4C 21 7.8 .76 1. .99 24 12 20 14 28 30 80 38 IB 7.3 .76 2. .76 25 12 20 14 28 35 78 37 16 7.3 .76 2. .76 26 12 20 14 28 37 76 37 16 6.8 .76 2. .76 27 12 19 14 28 38 75 38 16 7.3 .76 1. .76 28 12 19 14 28 3,730 73 38 15 11 .76 .7 .76 29 12 30 12 18 .50 .76 31 12 15 26 66 - " 13 .76

MEAN n.6 20.0 15.5 30.1 242 481 45 .6 24.5 8.60 2.5T .91 2.21 MAX 12 37 18 110 3,730 5,240 64 39 13 11 2.7 11 MIN 8.6 11 14 14 26 66 34 12 6.4 .76 .5C .42 56 131 SANTA CLARA RIVER BASIN

11113000 SESPE CREEK NEAR FILLMORE, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF SESPE CREEK AND FILLMORE IRRIGATION CO. S CANAL NEAR FILLMORE, CALIF., WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

AUG 1 3. 9.9 5.8 3 2 . j s 31 19 9.7 5. * 3. 222 544 153 90 51 32 19 9.4 5. 5 3. 3 - 207 484 150 88 50 32 IB 9.2 5. 6 3. j^ 195 4*8 424 86 49 30 18 9.0 5. 7 3. 3, 186 405 375 84 4B 27 17 8.6 5. e 3. 3. 177 375 266 83 47 28 17 8.6 5. 9 3. 17* 335 242 82 47 28 17 8.3 5.

ll 162 278 186 79 45 30 17 7.9 5. 12 3. 3. 168 251 174 77 46 30 16 7.8 5. 13 3. 3. 162 227 166 77 44 30 15 7.8 5.

15 3. 392 1*8 205 148 76 41 29 14 7.6 5.

16 3. 3,800 1*2 196 142 75 41 28 14 7.3 5. 17 3. 6.130 138 184 138 72 40 28 13 7.2 5.; 18 3. 2,500 132 181 132 9 40 26 13 7.1 > 5. 19 3. 1.050 128 172 130 0 38 27 12 7.0 5. 20 3. 296 125 169 125 8 38 26 12 7.0 6.

21 3. 123 123 163' 121 9 38 23 12 6.9 6. 22 3. 4.900 121 157 114 22 12 6.9 5. 116 6.5 5. 2* 2. 9.540 112 149 110 5 36 22 11 6.4 5. 25 2. 2,100 112 143 138 4 35 22 11 6.4 5. 26 2. 1,040 110 141 104 62 35 22 11 6.4 5. 28 3. 5C2 107 136 98 61 33 22 10 6.5 5. 29 3. 405 11.900 130 57 34 20 10 6.6 5.

818 430.9 237.7 18 163. MAX 3. 9.9 6. MIN 2, 3.2 107 130 98 54 32 20 9.9 6.4 5.t 1.620 B55 471 32

COM 3INED DISCHARGE , IN CUBIC FEET PER SECOND, OF SESPE CREEK AND FILLMORE IRRIGATION CO. 'S CAN L NE DAY )CT NQV DEC JAN FEB MAR APR UY JUN JUL AlK SEP

1 .3 4.9 24 60 237 69 227 450 110 49 2 13 2 .1 4.9 86 58 2 13 3 .0 5.1 1,900 56 199 67 232 420 103 45 1 14 .9 5.3 311 55 184 5 .0 5.5 14 6 .0 5.9 14 7 14 .7 335 8 14 9 .4 76 381 55 141 61 385 338 93 38 9 14 10 .4 43 296 54 131 61 360 315 91 37 8 14 11 .6 33 246 5? 124 92 646 290 87 36 8 14 12 .7 26 216 56 122 2.500 480 267 B5 35 6 14 13 .6 22 186 B2 34 6 14 14 .1 20 155 56 118 1.310 385 231 80 33 6 14 15 .1 19 220 78 33 7 14 16 .0 17 130 55 6 13 17 .9 16 122 56 106 541 314 '212 72 31 6 13 18 .9 15 114 55 102 418 1,060 200 70 31 6 13 19 -8 14 108 55 98 351 945 1B9 68 30 6 13 20 .9 32 102 56 93 305 700 179 67 29 5 13 21 .1 44 96 55 88 22 .2 34 92 1 ,160 83 251 1,820 155 63 27 4 14 23 .0 28 87 434 81 233 24 .0 27 83 3 ,300 4 14 25 .0 23 79 1 .540 B8 196 780 137 58 25 4 14 26 .1 23 76 638 82 178 724 130 56 25 4 14 27 .3 21 73 445 74 164 732 126 55 25 4 14 2B .4 20 4 14 29 .4 22 65 305 - - 149 582 122 53 24 3 14 30 .1 22 3 14 31 61 265 223 112 23 13 030 510 412

MAX .3 776 10,400 3 ,300 2 14 WIN .8 4.9 24 54 71 60 227 112 52 23 3 13 0 817

82,360 157,100 SANTA CLARA RIVER BASIN

11113000 SESPE CREEK NEAR FILLMORE, CALIF.--CONTINUED

COMBINED DISCHARGE! IN CUBIC FEET PER SECOND, OF SESPE CREEK AND FILLMORE IRRIGATION CO.

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 14 13 7.0 4.9 4.4 2 14 6.7 4.9 4.5 3 14 12 6.4 4.8 4.6 4 14 12 59 37 36 39 35 24 11 6.1 4.7 4.6 5 14 5.9 4.7 4.6

6 13 12 52 37 39 39 34 24 12 5.9 4.6 4.5 33 23 12 5.9 4.9 4.2 8 5.9 4.8 4.1 9 12 12 47 37 38 191 31 23 12 6.0 4.5 4.0 10 12 21 12 5.6 4.4 3.9

11 11 5.5 4.4 3.9 12 13 11 43 38 37 107 35 20 11 5.3 4.5 3.9 13 n 11 42 36 68 134 35 20 10 5.3 4.7 4.0 14 13 11 41 38 55 126 34 21 9.9 5.3 4.8 4.2 15 12 12 41 36 45 113 33 21 9.6 5.6 4.9 4.5

16 12 12 41 34 42 105 32 20 9.2 5.9 5.1 4.6 17 12 14 8.8 5.9 5.3 4.6 18 12 14 57 32 66 90 32 18 8.7 5.6 5.2 4.4 19 83 31 17 8.4 5.5 5.1 4.5 20 12 401 54 32 51 76 31 17 7.9 5.5 5.0 4.8 21 13 966 47 32 48 68 31 16 7.6 5.2 4.8 4.6 22 13 30 17 7.2 5.2 4.8 4.4 23 7.0 5.1 4.5 4.1 24 13 7.1 5.1 4.3 4.0 25 43 46 28 16 7.1 5.0 4.3 4.0 26 13 51 36 41 24 14 7.1 5.0 4.2 4.6 31 12

128.9 MEAN 1 MAX 14 13 7.0 5.3 4.8 MIN 11 11 7.0 4.9 4.1 3.9

COM BINED DISCHARGE, IN CUBIC FEET PER SECOND, Of SESPE CREEK AND FILLMORE IRRIGATION CO. 'S CANAL NEAR FILLMORE, CALIF. , WATER YEAR OCTOBER 1968 TO SEPTEMB ER 1969

DAY 3CT JUN JUL AUG SEP

1 .7 5.2 9 2 15 2 .7 5.2 a i ,530 ,760 346 148 9 46 29 15 .B 5.2 8 948 ,510 390 145 8 43 28 17 0 5.3 7 748 ,350 309 158 8 41 28 17 5 .9 5.4 7 873 ,190 364 142 8 41 25 17

6 .9 5.1 7 6 ,630 ,110 395 136 8 41 24 18 7 .9 5.1 7 1 ,760 ,030 318 133 9 41 28 17 g .8 4.9 8 1 28 17 9 .8 4.9 8 988 884 304 127 73 40 27 16 13 .9 4.8 B 956 852 314 125 74 39 28 16

11 .9 .8 7 980 780 318 122 74 38 30 16 12 .0 .9 8 16 13 .2 .0 13 716 665 296 118 73 44 27 16 14 .0 .9 149 630 600 259 116 71 41 23 17 15 .7 .2 22 832 558 216 114 68 40 22 17 16 .7 .B 17 996 528 210 112 66 38 23 17 17 .0 .7 10 844 516 204 108 65 38 22 18 18 .6 .6 14 636 522 204 106 63 38 21 18 19 .8 .7 3,890 820 486 198 104 62 35 21 18 20 .2 .6 4t080 812 468 195 102 59 35 21 18 21 ^5 1.6 21 18 22 .0 1.6 3,010 1 ,150 516 192 98 58 32 21 18 23 .6 1.6 1,390 5 ,400 486 21 18 24 .5 3.6 B 3,410 19 .700 468 180 92 55 32 20 18 434 174 88 54 32 19 17 85 53 31 19 17 27 .5 5.2 12 5,920 3 .110 406 165 79 53 31 19 17 2B .6 5.2 15 5,210 2 ,720 406 160 77 51 32 19 17 29 7 17 30 .0 5.3 10 3,410 400 152 73 48 30- 19 17 31 0 3 2,740 = 400 71 30 19 731 510 23.6 17.0 MAX .2 5.4 , 158 74 ' 46 31 18 MIN 0 1.2 4. 4 7.0 630 400 152 71 48 30 19 15

MIN 1. 2 AC-FT 465,300 SANTA CLARA RIVER BASIN

11113000 SESPE CREEK NEAR FILLMORE, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, Of SESPE CREEK AND FILLMORE IRRIGATION CO. NEAR FILLMORE, CALIF., WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL tUG SEP

2 18 IB 25 21 27 2,650 60 38 ia 12 .8 5.6 3 18 18 25 22 27 855 59 37 16 11 .8 5.6 4 17 18 25 22 27 972 56 36 16 9.7 .8 6.6

6 18 40 25 20 27 595 53 38 16 9.5 .9 10

8 18 28 26 20 27 382 53 40 16 9.9 .6 12 9 18 25 26 28 126 329 52 37 16 13 8.8

12 18 21 26 43 168 175 50 34 16 11 .5 7.2 13 18 16 9.3 6.7 14 19 17 9.1 6.7 15 20 22 23 31 66 152 50 30 17 8.6 .2 6.7

17 20 21 23 44 56 125 50 28 16 8.2 .3 5.9 18 20 21 23 40 51 118 51 29 16 8.D 6.0 19 20 21 22 35 48 108 50 29 16 7.8 6.0 20 20 21 22 32 43 100 49 28 16 7.7 6.1 21 20 21 7.7 6.0 22 20 21 7.6 5.5 23 20 21 22 28 32 65 47 27 15 7.5 5.7 24 20 22 21 29 30 80 46 24 15 7.5 .7 6.0

26 14 7.4 .9 5.6 28 1 22 21 7.4 5.6 29 1 22 23 28 72 42 21 16 7.2 .9 5.7 31 1 22 22 28 67 41 19 14 7.2 .8 5.7

TOTAL 58 .4 207.8

MAX 20 40 27 110 3,730 5,240 64 40 21 16 .9 13 MIN 17 18 20 20 27 66 41 19 14 6.9 .7 5.5 406 SANTA CLARA RIVER BASIN

11113500 SANTA PAULA CREEK NEAR SANTA PAULA, CALIF. LOCATION.--Lat 34°23'44", long 119°04'32", in NW^SWitSWit sec.27, T. 4 N. , R. 21 W. , Ventura County, on right bank rth of Santa Paula. DRAINAGE AREA. - -40.0 sq .1.

t. GAGE. --Water-stage recor opographi Dec. 5, 1963, at pres datum.

AVERAGE DISCHARGE. --43 y ears, 21.7 cfs (15,720 ft per year) ; median of yearly mean dis charges, 10 cfs (7,200 acre-ft pe-r year).

EXTREMES. --Maximums and minlmums (dis charge in cubic feet per second, gage height in feet),

m discharge ( *) and pe ak dis charges above base (200 cfs), water yea rs 1966-70

Date Time Di sch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 16, 1965 2400 810 3. 75 Apr. 22 , 1967 0130 446 3.26 Jan. 25, 1969 16,000 a!2.2 Nov. 24, 1965 0445 *6 ,480 7.49 Feb. 6, 969 1,900 a4.75 Dec. 29, 1965 1530 6 ,060 7.28 Nov. 21 , 1967 1045 *345 3.97 Feb. 15, 969 375 a2.00 Nov. 30 , 1967 1045 266 3.14 Feb. 25, 969 *21,000 a!5.18 Nov. 7, 1966 1730 344 3.19 Mar. 8 , 1968 0415 298 3.39 Dec. 6, 1966 1530 *4 ,500 6.43 Feb. 10, 970 2245 268 5.99 Jan. 24, 1967 1500 1 ,500 4.45 Jan. 19 , 1969 2,400 5.16 Feb. 28, 970 1630 *940 7.55 Mar. 12, 1967 2315 820 3.80 Jan. 21 , 1969 0600 5,300 7.30 Mar. 5, 970 0030 235 6.10 a From floodmark, Annual Wtr yr Date Di scharge Wtr yr Date Discharge 1966 Oct. 1, 2, 1965 .10 1969 Nov. 2, 6, 7, 12, 1968 1.1 1967 Nov. 1, 1966 1.3 1970 Aug. 24, 1970 1.5 1968 Sept. 10, 1968 .78 Period of record: Maximum discharge, 21 ,000 cfs Feb. 25, 1969 (gage height, 15.18 ft , from floodmark), e height 12.2 ft; no flow at times in 1949 , 1951-52, 1965.

REMARKS. --Records good e o gage-height record and those for peri station for irriga- -70, 373, 247, 364, 359, and 463 acr e-ft, respect ater yea published in reports of the Geolog ical Surv ey. COOPERATION. --Record of diversion fur nished by Santa Paula Water Works. REVISIONS (WATER YEARS) . --WSP 1635: 1933(M), 1934, 1936(M), 1941(M). WSP 1715: Drainage

DAY DCT NOV DEC JUL AUG SEP 1 .10 .50 69 196 41 28 10 7.3 3.5 2.6 2.8 39 30 9.1 6.8 3.5 2.3 2.7 3 .60 .4C 56 157 37 29 9.1 6.2 3.5 2.4 2.5 4 .80 .40 51 141 36 28 10 5.9 3.5 2.4 2.5 5 .80 .40 41 13B 36 27 10 5.5 3.5 2.3 2.6 6 .40 .40 37 126 89 26 10 5.2 3.5 2.1 3.2 10 5.0 3.5 2.2 2.6 8 .50 .50 35 97 53 25 11 5.5 3.5 2.1 2.0 9 .50 .60 34 87 47 25 13 5.3 3.5 2.1 1.9 10 1.1 .60 32 79 43 23 12 5.2 3.5 2.1 2.0 11 1.2 .60 31 71 40 22 10 5.0 3.2 2.0 2.1 12 1.2 1.0 31 66 38 22 9. 4.7 3.2 2.1 2.4 13 1.2 l.l 32 59 37 22 8. 4.7 3.2 2.2 2.3 14 1.3 1.8 34 2 36 22 B. 4.1 3.2 2.1 2.2 15 1.2 3.7 32 0 32 22 8. 5.0 3.2 2.0 2.1 16 1.2 206 29 5 30 21 B. 5.0 3.2 1.9 2.0 17 1.2 571 23 8 29 20 B. 5.6 3.2 1.9 1.8 18 1.2 224 22 7 2B 19 B. 5.2 3. 1.9 2.0 19 1.1 107 21 a 27 19 7. 5.4 3. 2.0 1.7 2C .80 55 21 9 27 19 7. 5.3 3. 2.1 1.6 21 .50 36 20 57 28 18 8. 4.0 2.4 1.6 22 .50 601 20 57 3C 18 8. 3.7 3. 2.4 1.5 23 .60 669 23 56 30 18 8. 3.7 3.0 2.3 1.5 24 .60 2,020 27 55 30 17 8. 4.0 3.0 2.2 1.6 25 .60 367 27 55 29 18 7. 3.9 3.0 2.1 1.7 26 .60 209 28 54 29 17 8. 4.2 3.0 2.1 1.8 27 .60 148 24 51 28 17 8. 3.4 3.0 2.1 1.8 28 .70 110 23 47 27 17 8. 3.4 3.0 2.3 1.6 29 .70 86 1,740 46 15 8. 3.0 3.1 2.2 l.B 30 .70 79 633 75 14 8. 3.1 3.3 2.3 2.2

MEAN .76 183 115 80.5 37.1 21.2 13.3 9.0 4.81 3.25 2.18 2.07 89 30 16 13 7.3 3.5 2.6 3.2 MIN .10 .40 20 42 27 13 11 7.6 3.0 3.0 1.9 1.5 1.300 793 555 2B6 200 134 123 SANTA CLARA RIVER BASIN

11113500 SANTA PAULA CREEK NEAR SANTA PAULA, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 2.0 1.3 4.4 21 58 22 30 132 43 21 12 9.8 2 1.9 1.4 52 21 51 22 24 125 41 20 12 9.7 3 Z.O 1.5 276 20 47 23 17 115 40 20 11 9.6 * >.3 1.6 2* 20 45 23 36 110 9 19 11 9.6 5 8 19 11 9.6 6 !.5 3.9 1.660 2 0 4C 22 29 100 7 IB 11 9.6 7 '.5 168 559 1 9 38 22 56 95 6 18 11 9.6 6 >.5 32 221 1 5 17 10 9.6 9 >.5 12 107 2 0 34 43 36 85 4 17 10 9.6 10 '.6 8.1 75 2 0 33 65 35 80 33 16 10 9.6

11 >.6 7.1 59 2 0 32 89 168 76 32 16 0 9.5 12 .7 6.3 50 1 9 31 461 121 72 31 16 9.5 13 0 9.5 14 .0 5.4 46 1 9 31 318 105 67 30 15 0 9.5 15 .9 5.1 39 1 0 9.5

16 .1 4.9 37 2 2 28 168 98 63 29 15 10 9.4 17 .8 4.8 35 2 3 28 136 96 60 28 14 10 9.3 IB .5 4.5 33 2 2 27 112 254 57 28 14 10 9.2 19 .5 4.6 32 2 14 1C 9.2 20 .5 8.3 31 2 2 26 78 218 52 26 14 10 9.0 21 10 9.0 22 .8 5.4 29 246 25 54 312 48 25 13 10 9.0 23 .6 5.2 .28 58 24 45 312 46 24 13 1C 9.0 24 13 10 9.0 25 .6 5.7 26 37 13 10 9.3 26 .9 5.6 25 24 10 8.8 27 .0 5.3 24 17 13 10 8.8 28 .9 5.4 23 13 7 23 21 171 43 23 12 10 6.a 29 .8 5.3 23 10 9 19 158 43 23 12 10, 8.8 30 .6 5.0 22 8 144 44 22 12 10 8.8 31 12 10V

9.8 H1N 1.4 1.3 4.4 19 -. 23 16 17 42 22 12 13 8. 8

AC-FT 19,090

NOTE. STA GE-BISCHARGE RELATION INDEFINITE MAY 3 TO SEPT. 30.

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMt ER 1968. DAY C SEP

1 9 .4 6.5 94 11 9.5 11 68 9.5 4.8 3.9 1.7 1.8 2 8 .4 6.5 32 11 9.1 11 37 10 4.5 3.9 1.8 2.2 3 fl .4 6.5 17 11 8.9 10 15 10 4.5 3.7 2.0 1.7 4 1 .3 6.5 14 11 8.6 10 14 10 4.3 3.7 2.2 1.7 5 8 .8 6.5 14 10 8.5 10 13 10 5.2 3.7 2.2 1.9 6 e .1 6.0 13 10 8.8 11 13 8.4 5.5 3.7 1.9 2.2 7 a .4 6.C 13 9. > B.9 59 12 7.6 5.4 3.7 2.3 2.6 8 9 .1 6.0 12 9. ) B.8 140 11 7.9 5.8 3.8 1.9 1.6 9 7 .6 6.0 11 8. 9.7 81 11 8.1 5.2 3.5 1.8 .84 10 7 .1 6.0 11 9. 9.6 78 10 7.6 4.8 3.2 1.6 .78

11 6 .7 5.5 11 9. 9.4 69 11 8.0 4.7 3.0 1.7 1.0 12 6 .4 5.5 10 6. 9.6 43 11 8.1 4.6 3.0 1.8 1.2 13 6 .5 5.5 9.5 8. 16 47 11 7.8 4.5 3.L 1.8 1.4 14 6 .5 5.5 9.0 8. 18 37 11 8.1 4.4 3.7 1.9 1.6 15 6 .6 5.5 9.5 8. 16 27 11 7.6 4.4 .3.8 2.3 1.9 16 6 .4 5.0 10 8. 15 25 11 17 6 .7 5.0 11 8. 47 23 11 6.5 4.3 2.9 2.8 1.7 ID 6 .2 5.0 25 8. 45 19 10 5.9 4.2 2.8 2.8 1.7 19 6 .1 40 16 8. 20 6 .2 25 12 8. 20 16 9.0 5.4 4.1 2.5 2.5 2.3 21 6 .7 154 11 6. 17 15 8.4 5.6 4.1 2.7 2.7 2.3 22 7 .2 92 11 8. 15 14 8.1 6.1 4.0 2.3 2.7 2.3 23 7 24 7 .0 6.3 10 12 12 13 7.7 5.4 4.1 1.9 2.5 1.2 25 7 2 5.3 10 13 12 12 9.2 5.1 4.1 2.1 2.6 1.3 26 7 4 5.6 10 14 12 12 10 4.8 3.9 2.2 2.5 1.3 27 7 .5 6.1 10 21 12 11 12 4.2 3.8 2.0 2.1 1.5 28 7 .4 8.8 11 12 12 10 29 7 .4 9.2 11 10 11 10 30 6 .8 187 11 9.9 13 9.4 5.8 4.2 2.0 1.9 1.8 31 6

400.8 216.9 134.1 90.5 67.6 50.52 2.92 2.18 1.68 MAX 9 .4 187 94 21 47 140 68 10 5.8 3.9 2.8 2.6 HIM 6 .1 5.0 9.0 8.1 8.5 10 7.7 4.2 3.8 1.7 1.6 .78 AC-FT 4 266 180 134 100 CAL YR 1967 TOTAL 15.850.59 MEAN 43.4 MAX 487 HIM 5.0 AC-FT 31,440 HTR YR 1968 TOTAL 3,970.62 MEAN 10.8 MAX 187 MIN .78 AC-FT 7,880 SANTA CLARA RIVER BASIN

11113500 SANTA PAULA CREEK NEAR SANTA PAULA, CALIF.--CONTINUED WMFR

1 .» 1.3 3. 2,1 260 600 H 37 27 21 10 CJ £ 2 .* I.I 2, ?.3 215 520 11 37 27 21 ' 7 5, 3 ,8 I.I 2. 2.3 185 160 10 \b 27 20 1 5. *i .fl 1.0 2. 2.? 170 105 10 36 27 20 ' 1 5. 5 .7 1.2 2. 2.2 190 355 11 36 27 20 8 5. 6 .7 1.1 2. 2.2 900 310 75 J5 27 20 5 i. 7 .9 1,1 2, 2,1

9 .9 1.3 2. ?,1 IS 11, 10 .9 1.3 2. ?.l 290 235 58 32 2S 18 a. 11 .1 1.2 2, 2.1 260 220 55 31 29 18 i. 12 .9 1.1 3. 2,1 220 205 52 31 30 17 11, 13 ,9 1,3 3, 5,0 190 190 50 30 30 17 1, 11 .1 1.5 3. 25 170 175 19 30 30 16 , 1, 15 .3 2.7 1. 13 245 165 18 29 30 16 1.

16 .0 2.5 3, 5,0 190 152 07 29 29 16 u. 17 .2 2.7 3. 3,9 170 1112 16 29 26 15 19 ,2 2.6 3. 1,200 150 126 15 2<> 26 15 i. 20 .9 2,5 3. 3/5 102 120 115 29 25 111 * 21 .9 2.0 3, 3,500 112 135 11 28 21 10 ".

23 .7 2,h 3, 590 750 112 111 28 23 10 i. 25 ,5 3.0 7. 7,200 8.900 102 13 28 22 13 i. 26 .6 3.3 5. 3,500 2,500 too 28 22 13 u. 28 .1 3.3 3. 900 660 90 00 21 12 30 .5 3,3 2, 500 89 38 27 21 11 1,

lit. tAN 1 86 2,08 3,3 71S 208 AX .1 3.3 7, 7,200 8,900 600 115 37 30 21 5, IN .1 1.1 2, 2.1 112 67 38 27 21 10 5 II, C-FT

C AC-Ft 112,700 NOTE NO GAGE-HEIGHT RECORD DEC. 2

0

1 5.0 5,1 6.H 5.6 1.2 2«fl 5 8.5 6.1 0.1 2.3 2.2 2 5,0 5.3 6.8 5,3 11 , 1 ??0 5 8,5 6,3 0.0 2.3 2.3 3 5.0 5,2 6,8 5.0 U.O 93 1 8. 11 6,2 3,8 2,i 2.3 u 5.0 5,2 7.2 5,0 3,9 121 1 S.O 6.1 3.6 2.2 2.3 5 5,0 5.2 7,1 5,0 3,9 111 3 ".6 0.0 3.5 2,2 2.3

k 5.0 1? 7,1 5.0 3.9 105 3 9,0 6.0 3,1 2,1 2,3 7 5.2 10 7,6 5,0 3.9 79 3 9.0 5.9 3.3 2.1 2.3 8 5,2 C.o 7.0 5.0 10 51 2 «.« 5.8 3,2 2,0 2.3 9 5.2 7,0 7,t> 6.0 20 10 2 ".7 5,8 3,2 1.9 2.3 10 5.2 6,5 7.6 32 100 311 2 8.6 5.7 3.1 I.B 2.3 11 5,2 6,1 7,6 16 39 32 1 6,5 -5.6 i.1 1.8 2.3 12 5.2 6.11 7.6 9.5 20 28 1 (>.0 5,5 3.0 1,7 2.3 13 5.2 6.11 7.6 6.0 13 26 0 8.3 5.0 3.0 1.7 2.3 11 5.11 6.1 6.0 7.0 11 25 0 «.2 5.1 3.0 1.7 2.3 15 5.6 6.11 8.0 6.5 9.5 23 0 8.0 5,1 2.9 1.7 2.3 5.6 6.1 8.0 8.0 9.0 22 10 7.9 5.3 2.9 1.7 2.3 17 18 5.6 6.1 8,0 8,0. 7,6 20 9.7 7,7 5.3 2.8 1.7 2.3 19 20 5,8 6,1 7,6 7,0 6.9 19 9,5 7.5 5.2 2.8 1.6 2.3 21 5.8 6.2 7,6 6.0 6,5 18 9,1 7,1 5.2 2.7 1.6 2.3 22 5,8 6,2 7.6 6.0 6.3 18 9.3 7.3 5.1 2.7 1.6 2.3 23 5.C 6,2 7.3 5.7 6.0 17 9.2 7.2 5.0 2.7 1,6 2.3 5.8 6,3 7.0 5,1 6,0 17 9,0 7.1 (1.9 2.7 1.5 2,3 25 5,8 6,3 6,6 5,2 5.9 17 8.6 7.0 1,8 2.6 1.6 2.3

26 5.8 6,1 6,6 5.0 5,9 17 8.8 6.9 11.8 2.6 1.8 2.3 27 5.6 6,5 6.6 1,8 5.9 16 8.8 6.8 1.7 2.5 2.0 2.3 2« 5,6 6,6 6,6 11.7 222 16 8.8 6,7 1,6 2.5 2,1 2.3 29 5.6 6,6 0,6 11,6 ...... 16 8,7 6.6 1,5 2.5 2,2 2,3 30 5.6 6,6 6.1

TOTAL 168,0 196.5 225.5 221.1 551,2 1,611 323,1 202.1 161.7 92.6 58,5 68.9 H E«N 5,«3 6,55 7.27 7,10 19.8 52.0 0.8 7,82 5.39 2.99 1.89 2.30 M X 5.8 12 8.0 32 222 29« 15 9,0 6,1 1.1 2,3 2.4 M IN 5.0 5.2 6.0 11.3 3.9 15 8.7 6.5 «.3 2.0 1,5 2.2 611 "B! 321 180 116 137

NOTE. STAGE-BISCHARGE RELATION INDEFINITE MOST OF TIME. SANTA CLARA RIVER BASIN

11113900 SATICOY DIVERSION NEAR SATICOY, CALIF. LOCATION.--Lat 34°17'06", long 119°07'14", in Santa Paula Y Saticoy Grant, Ventura County, on divers 0.7 mile downstream from Santa Clara River and 1.5 miles east of Saticoy. PERIOD OF RECORD.--April 1969 to September 1970. October 1928 to April 1969 in files of United Wate tion District.

most ye

(State Highway 118) and for irriga tion in Pleasant Valley. See station 11110000 Piru Creek nes r Piru e publi shed in reports of the Geological Survey. COOPERATION. --Records furnished by Un ited Water Conservation District. DISCHARGE, IN CUBIC FEET PER SECOND, APRIL TO SEPTEMBER 1969

1 0 35-* 197 171 115 2/4 2 J 2H4 344 151 36 274 2M b 279 341 147 34 233 249 b

B 3/1 31 / b/ 3H 259 2b9 1 0 404 ?83 59 21 273 ?44

402 ?74 191 1?6 279 241 1J 402 269 183 155 400 306 159 Bl 260 2>>0

16 393 251) 18(1 99 269 245 IB i9b ?31 ISO 153 285 J95 ?li 17o 190 395 220 15R S02 270 255

21 38U ?22 189 213 265 2b7 22

24 394 211 1B3 200 265 209 369 211 189 207 272 23' 26 341 ?n5 183 214 275

37/ 185 1B9 232 273 169

TOTAL 10,4lb H.061 3,232 5.071 3,120 7,026 MEAN 347 263 174 164 252 234 16X 4115 351 212 232 287 2/4 116 129 AC-FI

1 64 06 61 IP 122 0 157 67 120 130 122 51 2 109 36 S4 U4 26 0 157 64 119 127 125 39 4 IBS 5u 70 20 23 0 14J 66 111 135 115 ?9 b 176 72 «0 22 32 (I 1J5 61 111 145 116 20 6 161 07 202 104 2B (i 139 76 lln 153 113 19 7 1/7 56 2?4 1(17 29 0 131 95 112 154 113 20 8 167 30 233 110 23 0 140 «/ 133 140 77 20 <* 165 31 24(1 109 51 (1 14* B5 132 13* 29 11 10 l/l Ov 196 2J6 11 0 136 95 112 136 ?H 12 11 198 11 lib 211 cl H4 11* )00 10« 13b 15 11 12 179 ni 64 IB/ li 69 12/ 100 116 141 15 21 U 1B6 06 /b 149 16 80 125 113 116 141 15 29 14 1«2 OS HI 119 191 67 109 115 1?1 144 26 49

16 IBn 99 /u 179 189 SO 104 111* 115 137 44 51 47 bl 59 49 19 209 80 61 148 151 01 112 115 114 135 49 53 20 210 79 63 131 113 31 112 117 119 139 49 56

21 201 OB 69 123 lib 40 81 94 124 135 50 54 57 75 121 72 23 96 101 129 128 65 54 ?4 88 4B 74 122 101 44 84 111 125 125 88 4? 25 86 53 80 122 101 156 79 109 124 122 R4 30 26 Bl 46 92 116 103 147 76 11* 135 125 66 15 27 92 46 94 116 106 133 83 113 135 127 59 17 28 82 57 97 120 56 117 81 120 134 13n 57 4? 29 79 48 95 104 - 136 76 105 141 130 56 47 30 67 49 105 10B 165 70 94 135 121 57 11

1,115

MAX 210 207 240 236 191 190 157 121 141 154 127 75 MIN 64 79 61 104 0 0 70 61 108 121 15 11 SANTA CLARA RIVLR BASIN

AVtRAGE DISCHARGE.--26 years, 115 cfs (83,320 acre-ft per year); median of yearly mean discharges, 21 cfs (15,200 acre-ft per year). EXTREMES.--Maximums and rainirauras (discharge in cubic feet per second, gage height in feet) for the water years

Ma;timum Minimum Majcimum Miinimum Date Disch. G.H. Disch. Wtr yr Date Disch. G..H. I)isch. 1950 Feb. 6, 1950 2,280 6.55 0 1960 Feb. 2, 1960 408 4..61 0 1951 0 0 1961 Nov. 7, 1960 21b 4..43 0 1952 Jan. IS, 1952 45,000 12.15 0 1962 Feb. 11, 1962 47,700 10,.09 0 1953 _ 0 1963 Feb. 10, 1963 5,060 7..65 0 1954 0 1964 Apr. 1, 1964 2,350 7..09 0 1955 May 1, 1955 500 0 1965 Apr. 10, 1965 3,360 7,.43 0 1956 Jan. 26, 1956 5,500 0 1966 Dec. 29, 1965 51,900 10..40 0 1957 Jan . 13, 1957 3,780 7.60 0 1967 Dec. 6, 1966 35,000 10,.17 0 1958 Apr. 3, 1958 52,200 11.03 0 1968 Nov. 21, 1967 4,000 0 1959 Feb. 16, 1959 11,000 7.62 0 Ann rs 19(59-70

Disch. G,,H. Date Time Disch. G.H. Date Time Disch. G.H. , 1969 0800 70,000 a!7..6 Feb. 25, 1969 0500 152,000 321.45 Mar. 1, 1970 2130 *9,960 8.48 , 1969 1000 * 165,000 23..07 Mar. 4, 1970 2100 7,400 7.20 Feb. 6, 1969 0430 3,650 7.40

:, 165,000 cfs Jan. 25, 1969 (gage height, 17.41 ft, present datura); no

REMARKS.--Records poor. Flow partly regulated since May 1955 by Lake Piru (see station 11109700). Natural flow

11113900) . AVERAGE DISCHARGE represents flow to the ocean regar dless af upstream deve lopraent. Water-quality records for

reviewed by

waterVars 1969-70.. Records of diversi on furnished by United Water Conse rvation District.

MONTHEND

WTR YR OCT NOV DEC JAN FEE MAR APR MAY JUN JUL AUG SEP TOTAL 1950 0 0 80 680 4,690 0 0 0 000 0 5,450

1951 0 0 0 0 0 0 0 0 000 0 0 1952 0 0 637 111,100 3,260 64,270 12,390 260 000 0 192,000 1953 0 3.0 2,530 770 2.2 0 1.0 0 000 0 3,310 1954 0 0 0 3,010 4,710 4,480 166 0 000 0 12,370 1955 0 0 0 108 54 0 26 758 000 0 945

1956 0 0 0 14,190 0 0 0 0000 0 14,190 1957 0 0 0 3,460 1,440 716 0 0 000 0 5,620 1958 0 0 12,920 1959 6.1 4.6 .6 2,070 17,210 17 8.3 4.8 0 0 0 0 19 , 320 1960 0 0 0 58 216' 6.1 51 0 000 0 331

1961 0 456 2.4 0 0 0 0 0 000 0 459 1962 0 114 1,260 6.5 220,900 2,190 18 0 000 0 224,500 1963 0 0 0 0 5,450 732 30 0 1.2 0 0 0 6,220 1964 0 815 0 1,220 .8 228 2,460 0 000 0 4,720 1965 0 1.6 3,230 0 0 1.6 4,360 0 000 0 7,590 J.O 1.5 1.0 .50 .sn .50 .50 .50

1",ion 11.SOO ?,060

e** fH , t U U 30 30 5,000 0 ...... Jl 1,000 OTAU 0 0 0 0 0 1,603 917 30. g B.-86 0 0 0 0 fl AX 0 14,500 ?2,<100 500 2J5 0 0 0 - 0 0 IN 0 0 .ao 000 0 o o o C-FT 0 95,400 56,360 l,8in U93 0 0 0 0 n

15(4,100 -

DAY JUL

1 0 0 0 0 10 175 a 0 3.0 0 0 10 330 3 0 1,920 0 0 20 2UO n 0 500 0 0 10 1UO 5 0 2,aso 0 0 100 1 00 6 0 1J.OOO 0 0 a5o 90 7 1,520 5,760 0 0 300 80 B 200 1,110 0 0 SCO 70 Q 20 350 0 " 0 220 60 10 16 100 0 2.0 150 50

11 1.1 30 0 250 600 00 12 i.a 5.0 0 1,800 500 JO 13 1.1 0 0 2,750 175 20 1 1 .90 0 0 1,100 175 10 15 .70 0 0 100 150 5.0 16 .50 0 o aoo 100 5.0 17 .10 0 0 150 75 1.0 18 .10 0 0 100 1,200 1 .0 19 .20 0 0 75 1,900 1.0 ao .10 0 0 20 500 1.0 at 0 0 0 0 1,600 1.0 a2 0 0 BOO 0 a, 380 0 23 0 0 100 0 1,350 0 21 0 0 3, 500 0 1,150 0 25 0 0 950 0 700 0

it> o - 0 350 0 500 0 a? 0 0 120 0 500 0 ae 0 0 10 0 U50 0 a9 0 0 6.0 ...... 0 aoo 0 JO 0 0 .50 - 0 100 0 31 0 0 0 o TOTAL 16,105 1,»>17,0 0 0 58.8 808 199 0 2ai 537 5J.I 0 n MAX 0 1,520 13,000 3,500 0 2,750 a, 380 375 0 n 13,580 31,910 SANTA CLARA RIVFR BASIN

11114000 SANTA CLARA RIVFR AT MONTALVO, CALIF.--CONTINUFD

1 0 3.0 3.0 u.o .60 0 .UO 0 .10 2 0 3.0 3.n 5.2 .60 60 .10 0 .70 3 0 J.O 3.0 2.1 .10 0 . 10 0 0 3.0 3.0 2.1 .30 0 0 0 .60 5 0 3.0 3.0 1.0 .30 0 0 .50 0

6 0 3.0 3.0 1 .6 .30 0 0 .10 0 7 0 3.0 3.0 2.1 HI 0 0 .20 0

0 3.0 3.0 2.1 166 0 .10 .10 0 10 0 J.O 3.0 1.0 i.o 0 .30 0 0

11 0 3.0 3.0 2.2 1.6 0 .20 .20 0

13 0 3.0 3.0 09 3.1 0 .60 0 0 1U 0 3.0 3.0 20 1.0 0 1.0 0 0 15 0 3.0 3.0 .80 .60 0 .60 .10 0

16 0 3.0 3.0 .70 .10 0 1.3 0 0 17 0 3.0 3.n 1.6 .20 0 .80 0 0 18 0 3.0 3.0 2.1 0 0 .60 0 0 19 200 3.0 3.0 1.2 0 0 .30 0 0 20 100 3.0 3.0 .70 0 0 .10 0 0

21 1 ,500 3.0 3.0 .60 0 0 .60 0 0 22 500 3.0 3.0 .10 0 . 0 .70 .?0 0 23 150 3.0 3.0 .UO 0 0 .60 .20 0 10 3.0 3.1 .10 0 0 .70 0 0 25 5.0 3.0 2.6 .10 0 0 .10 0 0

26 1.0 3.0 3.1 .10 0 o .in 0 0 27 3.0 3.0 U.? .50 0 0 0 .10 0 28 3.0 3.0 <1.0 .60 0 0 .20 .10 0 20 3.0 3.0 3.0 .60 0 0 .60 .50 0

TOTAL 0 2,783.0 93.0 96.5 161.10 1,711.60 62. 0 12.50 a. 00 1.90 0 MEAN 0 02.8 3.00 3.11 5.66 55.3 2. 8 .10 .13 .061 0 MAX 0 1,500 3.0 1.0 09 1,390 ( 0 1.3 .50 .70 0 MIN 0 0 3.0 2.6 .10 0 0 0 0 0 0

l 0 770 9,oeo' 8 42 57 5 .8.0 6. 5 B. 2 0 7UO 6,380 8 112 55 5 8.0 7. !> 8. 3 0 710 11,920 8 90 52 3 8.0 8. 3 0. 0 0 701 a, ooo e 41 50 3 . 8.0 7. 5 8. 5 0 698 3,290 6 50 65 3 0.8 8. 9,

6 0 10,200 2,800 6 38 35 3 0.8 8. 7 0 ?8 3<1 i 8.9 8. 0 ,800 2,170 (1 9 0 ,710 1,9

11 0 ,550 1,670 3 115 31 B.9 7.6 1 12 0 ,110 1,6?0 2 91 20 8.9 8.0 2 13 0 ,110 1,500 2 52 25 8.5 8.0 1 1U 0 , 160 1,U

16 0 1,000 1,110 1 75 21 11 7.6 8. .8 17 0 9

21 32,100 853 1,180 1 1 18 8.1 7.2 8. 22 5,680 1,710 1,100 1 37 17 8.1 6.0 8.

2U >1 17 7.6 7.6 8. 25 71,300 02,300 981 5 17 7.6 7.6 8.

27 7,350 11,800 932 7 16 8.1 9.U 28 3,770 10,700 1,010 U 111 8.5 8.0 12 20 2,530 876 2 11 8.9 9.& 15 8.0 8.0 13

TOTAL 0 0 306.9

0 0 15 9.8 1 13 MIN 0 0 0 0 608 8(18 6 1U 7.2 6.9 6. B.5 AC-FT 0 0 609 SANTA CLARA RIVER BASIN

11114000 SANTA CLARA RIVER AT MONTALVO, CALIF.--CONTINUED

GISCHiRGE, IN CUBIC FEET PER SFCONn, «TEH YEA" OCTOBER 1069 Tfl SEPTEMBER 1970

MOV OFC J»N FF8 *4R APK MAY JUN JUL

1 3 8.5 0.7 0 5, 30 25 .00 .70 .06 3 .07 2 3 8.1 2.7 . i 3, 90 15 .00 .2 .07 3 .07 3 3 7.6 3.1 . 2 1, 50 13 .30 .0 .07 . 2 .06 0 1 8.1 3.7 .0 1, 00 12 .30 .5 .07 2 .06 5 0 6.0 3.7 1. 1, on 11 .30 .5 .08 2 .06 6 0 122 3.5 2. 75 10 .38 .5 .08 2 .06 7 0 100 3.5 1. 2fl 9 .8 .38 .0 .08 2 .06 fl 0.0 15 3.3 . 6 17 9 .2 .38 .0 .09 . 2 .05 9 8.9 6.0 3.3 18 00 8 .*> .37 .3 .09 1 .05 10 9.0 5.3 3.1 575 81 8 .0 .25 .3 .09 1 .05 1 9.0 5.0 3.1 1,270 30 7 .5 .10 .3 .09 1 ,05 2 0.0 0.7 2.9 500 53 7 .0 . 1 fl .3 ,08 1 .05 3 9.0 0.0 2.9 213 50 6 .7 .17 .0 .08 1 .05 0 9.5 0.0 2.7 50 50 k .0 .17 .0 .07 . 1 .05 5 0.5 0.0 2.7 U6 52 5 .0 .25 .5 .06 1 .05

,, 0.5 1.1 2.5 2.5 SO 5 .2 .70 .5 .00 0 .05 7 0 3.5 ?.5 1 .0 57 0 .5 .0 .6 .02 0 .05 fl 0 3.3 2.3 .80 60 3 .6 .5 .6 .00 0 .05 0 0 3.1 2.3 .70 55 3 .1 .5 .6 .39 0 .05 0 0 2.0 2.0 .60 00 2 .7 .5 .5 .37 0 .05

1 0 3.3 1.7 .50 20 2 .1 .0 .0 .35 0 .05 2 0 3.5 1.0 .00 OB 1 .7 .3 .3 .30 0 .05 3 0 3.3 1.2 .30 97 1 .0 .90 .1 .32 0 .05 n 0 3.3 1.0 ,?0 8B 1 .2 .50 .00 .30 0 .05 5 0 3.3 .50 .10 81 1 .0 .30 .70 .27 9 .05 1 2.0 .00 0 .85 .33 7 1 3.1 .20 .55 71 .66 .32 .07 .15 9 .05 a 1 2.9 0 2,730 66 .52 .32 .05 .10 9 .06 9 1 3.5 0 62 .06 .33 .05 .10 8 .08 1 5.3 0 50 .01 .35 .06 .13 8 .10 0 0

T4L 3 7.8 007.7 66.90 0 5,221.«7 20, 18 180 .50 17. SB 3 .68 11.68 3, 0 1.68 »N 0.3 13.6 2.16 0 186 906 6 .15 .58 .19 .38 0 .056 13 100 0.7 0 2,730 5, 930 25 1.5 1.6 .09 N 8.9 2.9 000 00 .01 .17 .05 .13 7 .05 366 35 71 23 6 0 3.3

MIN 0 AC-FT 52,100 414 VENTURA RIVER BASIN

11114500 MATILIJA CREEK ABOVE RESERVOIR, NEAR MATILIJA HOT SPRINGS, CALIF. LOCATION.--Lat 34°29'41", long 119°19'48", in SWsSE'uSlft; sec.19, T.5 N. , R.23 W. , Ventura County, on left bank 1.6 miles upstream from Matilija Dam and 1.7 miles northwest of Matilija Hot Springs.

DRAINAGE AREA.--50.7 sq mi. PERIOD OF RECORD.--May 1948 to September 1969 (discontinued). Published Matilija" pr ve mean sea level (levels by Ventura County Flood ct). Oct. 1, 1967, to'jan. 23/1969, at site 300 ft downstream at datum 2.22 ft lower. AVERAGE DISCHARGE.--21 years, 28.0 cfs (20,290 acre-ft per year); median of yearly mean discharges, 9.0 cfs (6,500 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (200 cfs), water years 1966-69 Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 16 , 1965 2345 3,990 8. 10 Dec. 6, 1966 1715 *5,190 9.80 Jan. 21, 1969 0330 11,300 Nov. 24 , 1965 0330 4,390 9.09 Jan. 24, 1967 1245 1,660 6.71 Jan. 25, 1969 0730 *19,600 14.25 Dec. 29 , 1965 0745 *5,540 9.89 Mar. 12, 1967 2145 562 4.37 Feb. 6, 1969 0200 2,950 8.90 Apr. 21, 1967 1630 287 3.51 Feb. 24, 1969 2230 15,000 13.75 Nov. 7 , 1966 1300 237 3.43 Dec. 3 , 1966 0245 542 4.03 Mar. 8, 1968 0600 *149 2.48 Annual minimurn daily discharge, water years 1966-69 Wtr yr Date Discharg e Wtr yr Date Di s charge 1966 Oct. 23, 1965 1. 2 1968 Sept. 4, 1968 .70 1967 Nov. 1, 1966 2. 4 1969 Oct. 24-28, 1968 1.4

ecord Mar. 25 to Sept. 30, 1969, which are poo

COOPERATION.--One hundred fourteen discharge measurements furnished by Ventura County Flood Control Disti nine discharge measurements furnished by Ventura River Municipal Water District. REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY DCT 1 JUL AUG SEP 1 100 T10 51 36 22 12 9. .5 3. 2 90 59T 50 35 21 12 9. .5 3. 3 BO 250 4T 34 21 13 9. ^ .4 3. 5 T4 190 44 32 19 13 8. .6 3.

6 Tl 1T6 T8 32 19 13 T. .9 3. 8 TO 150 56 31 20 12 T. .3 3. 9 Tl 138 53 31 21 13 7. .0 2. 10 68 131 5C 30 20 14 7. .6 2. 11 65 124 49 30 20 14 7. . .3 3. 12 68 111 48 29 20 13 7. .3 3. 13 62 105 4T 29 19 12 T. .2 3. 14 55 101 46 28 18 13 T. .2 3. 15 58 9T 45 28 IT 13 T. .2 3. 16 BO 55 82 44 28 16 13 T. .3 3. IT 9T 53 82 42 28 IT 13 6. .4 2. IB 3T 50 T8 42 2T 16 12 6. .4 3. 19 18 4B T4 41 2T 16 12 6. .4 3. 20 12 46 69 39 26 16 12 6. .5 3. 21 43 67 37 26 15 12 6. JO .2 3. 22 T2 .2 3. 23 94 36 57 37 26 14 10 6. .0 2. 24 1.82 42 56 36 25 14 10 6. .9 2. 25 53 .9 2.

26 31 41 50 36 25 3 '10 6. .T 2. 2T 21 39 49 35 25 3 10 6. .8 2. 28 17 40 47 34 25 4 10 5. .9 2. 29 14 2,890 46 24 4 10 5. t .8 3. 30 12 1,290 95 23 3 9.9 5. .8 3.

MEAN 1 i 52. 215 13S 45.4 28.4 IT 2 11.8 T.I 44 3 32 2.9 MAX 8 1,£ 20 2,890 T10 T8 36 2 14 9. .3 3. MIN 2 1 .4 35 46 34 23 3 9.3 5. .T 2. Tl 04 ITS

WTR YR 1966 TOTAL 22.117.9 MEAN 60.6 MAX 2,890 HIN 1.2 AC-FT 43,870 VENTURA RIVER BASIN

11114500 MATILIJA CREEK ABOVE RESERVOIR, NEAR MATILIJAHOT SPRINGS, CALIF.--CONTINUED

DISCHARGE! IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 OCT NOV DEC JUN JUL AU<; SEP 1 3.1 2.4 7.2 30 64 26 51 126 46 23 11 8.3 2 3.2 2.5 39 30 61 26 51 117 45 22 11 8.3 3 3.2 2.7 215 30 59 26 47 112 44 22 10 8.3 4 3.2 2.8 41 29 56 25 105 106 42 22 10 8.3 3.1 2.8 335 8.3 6 3.2 4.0 2,170 28 51 23 90 95 40 21 10 8.3 7 3.3 89 615 27 48 23 101 90 39 20 10 8.3 8 3.1 35 215 26 46 22 91 89 39 19 10 8.3 9 3.0 21 135 25 45 22 82 88 39 17 10 8.3 10 3.2 17 110 22 44 22 80 85 38 16 10 8.3 11 3.2 15 94 21 42 30 108 81 37 16 10 8.3 12 3.2 13 84 21 41 230 93 76 36 16 10 8.3 13 3.1 11 72 21 39 287 89 73 34'36 16 10 8.3 3.1 11 64 21 37 164 86 69 16 10 8.3 15 3.2 9.7 58 21 37 116 84 65 33 15 10 8.3 16 3.0 9.7 56 21 36 98 79 61 31 14 9. > 8.3 17 3.0 9.7 53 20 34 85 75 59 32 14 9. 8.3 18 3.0 9.2 52 20 33 77 133 57 30 14 9. 8.3 19 3.2 8.8 8 8.3 20 3.0 1C 6 20 31 65 115 55 27 14 8. 8.3 21 3.0 8.8 3 14 8. 8.3 22 2.9 8.4 1 139 33 63 248 52 26 14 8. 8.3 23 3.0 7.2 8 46 13 8. 8.3 24 3.0 7.5 5 613 35 54 201 50 25 13 8. 8.3 25 3.1 7.6 4 284 35 52 183 50 26 12 8. 8.3 26 2.9 8.3 2 166 32 48 172 50 25 12 8. 8.3 27 3.1 7.8 2 8.3 28 3.1 9.C 31 12 8. 8.3 29 3.0 8.6 31 80 49 142 49 23 12 8. 8.3 3C 2.7 8.0 30 8.3 31 2.7 30 68 54 47 12 8. 986 490 289. > 249.0 MAX 3.3 89 MIN 2.7 2.4 7.2 20 27 22 47 47 23 12 B.3 8.3 4,050 7,160 4,380

DISCHARGE , IN CUBIC FEET PER SECOND , MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY MAR APR MAY JUN JUL AUG SEP 1 8.2 6.5 16 10 10 8.4 21 8. 4.7 2.9 2.1 1.9 2 8.2 6.5 14 10 9.6 9.7 21 8. 4.1 2.4 2.2 1.6 3 8.2 6.2 14 10 9.7 9.3 16 8. 4.2 2.2 2.1 1.3 4 8.2 6.2 14 10 9.6 9.3 15 8. 4.9 2.1 1.9 .70 5 8.2 6.5 13 10 9.7 9.3 14 8. 5.0 2.2 2.2 .78 6 8.0 6.5 12 10 9.7 9.3 13 8. 4.9 2.1 2.2 .78 7 8.0 6.5 11 10 9.7 21 13 8. 5.2 2.1 2.1 1.1 8 8.0 6.5 11 10 9.7 117 12 8. 5.4 2.3 2.1 1.8 9 8.0 6.5 11 10 9.6 54 12 8. 5.3 2.2 2.1 1.6 10 8.0 6.5 11 10 9.7 43 12 8. 5.1 2.2 2.1 1.8 11 7.8 6.2 10 10 9.5 30 11 8.1 4.2 2.4 2.1 1.8 12 7.8 6.2 10 10 9.4 22 11 8.0 3.8 2.6 2.1 1.8 13 7.8 6.2 10 10 12 23 12 7.7 3.6 2.6 2.0 1.8 14 7.8 6.2 10 10 10 21 11 7.6 3.3 2.6 2.2 1.8 15 7.8 6.2 9.7 10 9.6 20 10 7.4 3.0 2.5 2.3 1.8

16 7.6 6.2 9.7 10 9.4 18 10 7.3 3.1 2.5 2.3 1.5 17 7.6 6.2 9.7 10 14 18 11 6.8 18 7.6 6.8 12 10 13 17 11 6.2 2.9 2.5 2. 3 2.1 19 7.6 14 12 10 12 17 10 6.2 2.9 2.5 2. 3 2.1 2C 7.6 15 12 10 12 16 10 6.0 2.9 2.5 2. 3 2.3

21 7.4 46 12 9.9 12 15 10 6.2 2.7 2.5 2. 3 2.3 22 7.4 25 11 9.9 11 15 23 7.4 19 10 9.9 11 14 24 7.4 15 10 9.9 11 14 8.7 6.1 2.7 2.4 1. 9 1.9 25 7.4 14 10 26 7.2 13 10 .8 10 13 8.5 5.2 2.9 2.3 2. 0 1.9 27 7.2 11 10 .8 10 13 8.2 5.0 3.0 2.1 2. 0 2.1 28 7.2 11 10 .8 10 13 7.6 4.8 3.1 l.B 1. 9 2.0 29 7.2 11 10 .8 9.7 13 8.1 5.1 3.3 1.7 1. 8 1.8 30 7.2 20 10 .8 13 8.1 5.3 3.3 1.9 1. 8 1.8 31 7.0 10 .8

MEAN 7.68 11.0 11.1 9.95 10.5 20.7 11.4 6.87 3.68 2.33 2.10 1.73 MAX 8.2 46 16 10 14 117 21 8.1 5.4 2.9 2.3 2.4 MIN 1.7 1.8 .70 AC-FT 472 652 685 612 602 1,270 6 BO 422 219 143 129 103

MIN . 70 AC-FT 5,990 VENTURA RIVER BASIN

11114500 MATILIJA CREEK ABOVE RESERVOIR, NEAR MATILIJA HOT SPRINGS, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

1 .8 2.C .7 306 752 90 50 28 21 12 .3 2 8 2.0 .6 274 692 88 49 28 21 12 .2 3 2.1 .7 238 590 87 48 28 20 12 .1 4 2.1 .8 215 515 86 47 28 20 12 .0 5 2.0 .0

6 2.0 .1 1,120 4D2 84 45 28 19 11 .9 7 2.0 .1 530 362 84 44 27 19 11 .9 8 2.0 .1 382 322 102 43 27 19 11 .9 9 1.8 .3 33B 294 92 42 27 18 10 .8 1C 1.8 .4 306 27D 84 42 27 IB 10 .8 11 1.8 .6 274 238 78 41 27 18 10 12 1.8 .3 17 10 { 13 1.8 .3 230 209 70 39 26 17 9.8 14 2.0 .4 218 198 68 39 26 16 9.8 . 15 2.6 6 266 178 67 38 26 16 9.6 16 2.0 .8 238 168 66 37 26 16 9.6 17 2.0 .8 224 160 64 36 26 16 9.4 . 18 2.2 .8 238 158 64 35 26 15 9.4 19 2.5 .8 44 218 155 63 34 25 15 9.2 20 2.5 .1 53 212 150 62 34 25 15 9.0 21 2.5 .1 4,04 22 2.5 .1 61 15C 138 60 32 24 15 8.6 23 2.5 .1 35 539 131 58 31 23 14 8.4 24 2.5 .1 86 6,210 124 57 30 23 14 8.2 25 2.7 .4 8,61 4,650 120 56 30 23 14 8.0 26 2.7 .7 4,21 1.4BO 115 55 29 22 14 .9 27 2.6 .1 1,70 945 110 54 29 22 14 .8 28 2.5 .1 90 13 .7 29 2.6 .1 63 102 52 29 22 13 .6 30 2.7 .1 44 51 29 21 13 .5 31 .1 37 ------92 29 13 .4

MEAN 1 MAX 2.7 .7 8,610 6,21D 752 102 50 28 21 12 HIM 1.8 .6 4.1 ISO 92 51 29 21 13 7.4 AC-FT 133 < : 9

TOTAL 2,347.16 TOTAL 58,232.20 VENTURA RIVER BASIN

11115500 MATILIJA CREEK AT MATILIJA HOT SPRINGS, CALIF.

DRAINAGE AREA.--54.6 sq mi. PERIOD OF RECORD.--October 1927 to September 1970. Combined monthly records for creek and diversion sine May 1951. Prior to October 1953, published as "at Matilija." GAGE. --Wat 969. A It itude of gage is 9 00 ft (fr om topo- graphic map). Prior to Feb. 11, 1939, at site 0.6 mile upst ream at d ifferent datum.

EXTREMES. - -Maximums and minimums fdischaroe in cubic feet p cond. e age heieht in feet) for the water years 1966 -70 are~contained in the following°tabl Maximum Minimum daily Wtr yr Date Discha rge G .H. Date Discharge 1966 Dec. 29, 1965 5, 530 8 .60 Feb. 18-20, Feb. 26 to Mar. 1, 1966 .30 1967 Dec. 6, 1966 3, 410 7 .40 Oct. 25, 1966 .80 1968 Oct. 11, 1967 269 3 .65 Dec. 15, 1967 .60 1969 Jan. 25, 1969 20, 000 16 .5 Sept. 23, 24, 1969 1.0 1970 Mar. 2, 1970 496 4 .14 Feb . 20', 1970 .47 Peri od of record: Maximum discharge, 20 ,000 cfs Jan. 25, 1969 (gage height , 16.5 ft) ting curve extende d above 4,200 cfs on basis of comput ation of peak flow over d am ; jninimum daily, 0 .10 cfs for several days in some years of regulated flow.

REMARKS Records good except those for Apr. 2 to Sept . 30, 1969 which re poor, Flow reg ulated by i-jan n.ja Rese rvo ir since February 1948 (see WSP 1928 , static n 11- 1150) .' Wate diverted at dam by Matilija conduit to Vent River basin and Ojai Valley for irrigation since May 1951 wa{discontinued in September 1966. COOPERATION. --Twenty-three discharge measureme nts furn ished by Ventura Ri ver Municipal Wate r District and 16 dis- charge measurements furnished by Ventura Co unty Flood Control District REVISIONS fWATER YEARS). - -WSP 931: 1939-40. WSP 1285 : 1951-52 . WSP 1928: Drainage area

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY C1CT NOV DEC JAN FEB JUN JUL AUG SEP 1 1.0 1.2 19 71071 116 3 .30 5.e.8 14 11 5.4 4.34. 2.2.9 2 1.0 1.6; 21 6006 161 4 .60 5.8.8 14 11 5.4 4.04. 3.0 3 ^ 49 2 31 .8 14 11 3. 3. 4 , . 190 2 4 .8 14 11 3. 3. 5 154 2 3 .2 13 11 3. 3 - 6 . 46 2 1 3 .7 13 11 3. 3. 7 . 9.9 1 1 1 13 9.3 3. 3. B . . 8.2 .2 13 9.0 3. 3. 9 . 88 .5 13 8.5 3. 3. ID 218 B 5 14 8.0 3. 2. 11 224 j 5 14 7.7 3. 3. 12 115 1 .5 14 7.7 3. 3. ) 19 .5 13 7.7 3. 3. 4 . 8.2 .5 13 8.0 3. 3. 5 2 8.2 .5 13 8.0 3- 3. 6 5 8.2 3 1 12 7.7 3. 3. 7 7 95 1 .8 2 U 7.2 3. 3. 8 4 193 2 .30 3 11 7.2 3. 3. q C 8.2 1 .30 2 11 7.0 3. 3. G 3 8.2 .3C 2 11 6.6 3. 3.

1 4 B.2 .4 1 11 6.6 3. 3. 2 . 5 8.2 1 ^ .7 11 6.5 3. 3. 3 Z 9.0 Z 4 .8 11 6.4 3. 3. 4 1, 8 9. 0 4 .0 11 6.4 3. 3. 5 2 9.0 3 .0 11 6.4 3. 3. 6 9 9.0 .30 .Z 11 6.4 3. 3. 7 1 9.0 1 .30 .5 11 6.4 3. 3. 8 . G 8: 16 1 .30 .5 11 6.4 3. 3. 9 0 7 2,900 .7 11 5.8 3. 3. 0 .( 1.300 8 .6 11 5.4 2. 3. 1 850 6 - .8 11 2.

AN . 9 191 213 16 ( n.3 12.8 1 3.1 12.2 7.94 5 3.3 3.2 X 1 4 1,18 2.900 71 ) 164 40 20 14 11 4. 3. N 0 1. 8.2 1 ) .30 .30 5.B 11 5.4 2. 2. 353 788 782 752 473 20 19

t COMBINED DISCHARGE* IN ACRE-FEET* OF CREEK AND DIVERSION. VENTURA RIVER BASIN

11115500 MATILIJA CREEK AT MATILIJA HOT SPRINGS, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FFET PER StCONO, fcATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

JUL AUG S6P

1 3.5 I.C 7.2 33 ".5 25 82 50 2.6 24 16 9.3 ? 3.5 .6 8.2 3 \ 3.5 12 82 45 25 24 15 9.3 3 3.5 .C 117 22 > 4.C 7.2 42 28 57 23 14 9.3 4 3.5 .4 52 13 J 24 3.1 87 32 57 23 14 9.3 5 162 .C 262 125 30 3.1 138 25 48 23 14 9.3

6 242 .6 7.7 12C 47 3.1 111 28 41 23 14 9.3 7 07 .6 533 12 ^ 30 3.1 12J 37 41 24 16 9.0 8 6.6 .8 213 11 3 16 3.1 112 88 41 24 16 9.0 9 6. u .6 148 19 b 4.f. 3.3 97 CO 42 24 16 9.0 1. 6.C .2 120 75 4.0 3.4 103 03 45 24 16 9.0

11 6.u .2 326 .2 4.? 3.8 186 68 5 24 16 8.7 12 6..C .2 219 1 4.C. 25 90 12 3 24 16 8.7 13 6.: .2 77 .0 23 125 62 8C 0 24 16 8.7 14 5.8 .2 80 .0 32 234 96 80 0 23 13 8.7 15 6. j .6 68 . j 36 245 96 ?99 9 16 9.3 B.7

16 5.6 .2 294 .0 38 230 91 106 9 16 9.6 B.5 17 6.C .5 158 .0 I 158 100 62 9 16 10 8.5 18 5.8 .2 50 .0 . 96 46 63 J 16 10 8.7 19 3.9 .8 49 .2 . 36 42 25C 8 16 11 8.5 2^ .90 .4 47 .2 . 74 32 60 5 16 11 8.5

21 .90 .4 232 .5 . 3. 99 57 5 16 10 8.5 22 .9G .6 138 18 11 48 97 4 16 9.9 8.5 23 .90 .8 41 10 11 33 180 4 16 9.9 8.5 24 .90 .8 4C 5 .0 11 16 52 4 16 9.9 8.5 25 .8C .C 4C 212 .C 11 00 56 4 16 9.9 8.5

26 .90 .2 39 36 3 4.0 11 90 52 30 16 10 8.5 27 1.0 .2 183 33 ' 14 47 85 49 25 16 11 8.7 28 I.C .2 137 237 25 62 75 49 25 16 11 9.3 ^ 16 11 9.0 IP ^* * " ^ " ^ ^ ' ) 62 60 2.4 25 16 9.9 9.0 16 9.C

MEAN 19.2 5.93 144 96.9 14.1 55.8 136 127 36.6 19.4 12.4 8.83 9.3 »IN .8C 1.0 7.2 7.0 3.5 3.1 42 2.4 2.6 16 9.0 8.5

t COMBINED DISCHARGE, IN ACRE-FEET, DF CREEK AND DIVERSION.

1 9.0 6.6 2: 4.1 3. 8. 6 7.0 6.0 5.0 4.4 4.1 2 8.7 6.2 17 4.4 3. 8. 6 7.0 6.C 5.0 4.4 4.3 3 8.7 6.6 15 4.8 2. 8. 5 7.0 6.0 5.0 4.6 4.1 4 8.7 6.2 15 4.8 2. 1. 2 7.0 5.8 5.0 4.6 4.0 5 9.0 6.2 13 4.8 2. . 2 7.0 5.8 5.0 4.4 4.0

6 9.3 6.2 13 4.8 2. 2 7.0 5.8 5.0 4.4 4.1 7 9.3 6.2 14 4.8 2. < . 2 7.0 5.8 5.0 4.4 4.1 8 9.3 6.2 14 4.8 2. < . 2 7.0 5.8 5.0 4.3 4.1 9 9.0 6.2 13 4.8 2. 2 7.0 5.8 5.0 4.3 4.1 i; 76 6.C 13 5.0 2. 12 7.0 5.8 5.0 4.3 4.0 11 69 6.0 13 5.0 2.9 8. 11 7.0 5.6 5.0 4.4 4.0 12 69 13 4.3 14 4.3 3 7.3 4.6 18 18 15 4.3 7.0 .60 4.6 13 21

17 4.3 6.4 3.7 4.6 13 21 6.4 6.8 5.4 5.0 4.3 1.4 18 4.3 6.8 4.4 4.6 13 20 6.6 6.8 5.4 5.0 4.3 1.3 19 4.4 1 4.4 4.6 13 20 6.8 6.8 5.4 5.0 4.3 1.4 20 4.4 4 4.1 4.6 13 19 7.0 6.8 5.4 5.0 4.3 1.4

21 4.6 5 4.3 4.6 13 8 7.0 6.8 5.2 5.0 4.3 1.4 22 5.2 3 4.4 4.4 13 8 7.0 6.8 5.2 5.0 4.3 1.4 23 5.2 6 4.4 4.4 13 7 7.C 6.8 5.2 4.6 4.3 1.4 24 15 8 5.0 4.3 13 7 7.0 6.8 5.2 4.8 4.3 1.4 25 17 2 5.6 4.1 13 6 7.0 6.8 5.0 4.8 4.3 1.8

26 8.0 7 71 3.8 11 16 7.0 6.8 5.0 4. a 4.3 2.7 27 8.9 1 41 4.3 8.7 16 28 8.0 3 8.4 4.1 8.7 16 29 8.2 3 1.5 4.0 8.7 16 30 7.2 5 4.3 4.1 16 31 6.2 4.3 4.0 16 6.0 4.4 4.1

MAX 76 41 71 5.3 18 2 16 7.0 6.0 5.0 4.6 4.3

AC-FT 838 418 325 300 267 179 .60 AC-FT 33t05C VENTURA RIVER BASIN

11115500 MATILIJA CREEK AT MATILIJA HOT SPRINGS, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET- PER SECOND, H4TER YtAR OCTOBER 1968 TC SEPTEMBER 1969

JUN

1 2.7 3.1 3.1 3.4 311 699 203 66 1C 27 41 6. 2 2.7 3.1 3.1 3.4 302 610 195 64 13 27 35 6. 3 2.7 3.1 3.1 3.4 299 558 185 61 14 27 3C 6. i* 7.7 3.C 3.1 3.4 ?96 5 CO 176 59 14 27 14 6. 5 2.8 Ifc3 3.r 3.5 305 448 175 57 14 27 13 6. 6 2.8 159 3." 3.5 1,160 380 174 54 14 27 12 6. 7 7.7 6.8 3.1 3.5 484 336 173 51 14 27 11 6. 8 2.6 6.7 3.0 3.5 14 27 10 6. 9 2.6 3.C 3.T 3.5 299 293 168 37 14 1J 2.6 2.1 3.0 3.5 269 284 164 28 14 27 8.0 6. 11 ?.6 2.1 3.0 3.4 24B 263 159 22 14 27 7.0 6. 12 2.6 2.3 3.0 3.4 232 245 159 18 14 28 6.7 6.

14 3.1 2.7 3.0 3.B 128 ?35 160 14 12 29 6.7 6. 15 2.7 3.0 3.5 3.7 147 220 150 13 10 29 6.7 6.

16 ?.7 2.9 3.3 3.5 188 215 138 12 10 29 6.7 6. 18 2.6 2.9 3.3 4.U 155 190 126 11 10 69 " 6.7 6. 2C 7.6 2.6 3.3 145 288 170 110 10 10 6B 6.7 6. 21 2.6 2.6 3.3 3,620 ?79 160 105 9.8 11 68 6.7 6. 22 2.6 2.7 3.3 662 266 150 100 9.7 11 67 6.7 2. 23 2.6 2.9 3.3 2TO 362 140 94 9.6 11 66 6.7 1. 25 2.6 3.1 3.7 8,340 6,250 130 86 9.4 11 65 6.7 4.

26 2.6 3.1 3.4 4, COO 1,650 128 83 9.4 20 64 6.7 6. 27 2.6 3.1 3.4 1,830 938 126 80 9.4 27 63 6.7 6.

29 2.7 3.1 3.4 543 118 73 9.3 27 62 6.7 6. 30 3.1 3.1 3.4 412 116 31 3.1 3.4 352 114 9.2 48 6.7

MEAN 2.69 13.6 3.2? 7C3 762 258 135 PIN 2.6 2.1 3.3 3.4 128 114 69 9.2 10 27 6.7 1.

MIN 1.3 AC-FT 4,640

NOTE. NO CASE-HEIGHT RECORD MAR. 16 TO JULY 21, AUG. 4 TO SEPT. 25.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

DAY OCT NOV SEP

I 6.6 6.4 5. ?4 36 132 25 7. .3 .0 6.4 131 2 6.6 6.4 5. 44 8.6 461 25 7. .3 .9 6.4 29 3 6.6 6.6 5. 7.7 .52 469 23 7. .7 .1 6.4 4.4 4 6.6 6.6 5. 4.3 .50 403 23 7. .7 .0 6.7 3.3 5 6.6 6.6 5. 8.7 .52 398 22 6. .7 .9 6.7 3.2

6 6.6 7.2 5. 8.0 .51 207 15 7. .7 .1 6.7 2.7 7 6.6 6.8 5. 7.0 .60 46 11 7. .7 .1 6.3 2.5 8 6.6 6.8 53 6.2 .63 47 18 7. .7 .1 6.3 2.7 9 6.6 6.8 59 6.6 30 141 19 7, .0 .3 6.3 2.8 10 6.6 6.8 50 6.2 60 114 14 8. 1 .4 6.3 2.6

11 6.6 6.8 83 .60 56 69 13 7. .8 .5 6.3 2.6 12 6.6 6.8 86 .50 18 27 13 7. .7 .5 5.9 2.7 13 6.6 6.8 65 .50 .74 36 13 7. . 7 .4 5.9 2.7 14 6.6 6.8 39 .50 .53 82 13 7. ,| .1 5.9 2.7 15 6.6 6.8 25 .50 .53 57 13 ' .1 .7 6.0 2.6

16 6.6 6.8 25 .60 .53 37 14 7.( .1 .7 5.9 2.4 17 6.6 6.8 68 .50 .50 37 11 ' .1 .7 5.9 2.4 18 6.6 6.8 79 .50 .53 36

20 6.6 6.8 n .50 .47 2

22 6.6 6.8 u .50 .50 1 5.9 6.1 7.1 6.6 5.9 2.5

24 6.4 6.re 8.0 .50 .55 2 5.5 6.1 7.5 6.7 5.9 2.4

26 6.4 5.8 5.9 .60 .50 27 5.8 6.5 .7 .7 5.9 2.5 27 6.4 5.8 .80 .60 4.9 26 5.5 6.3 .7 .6 5.9 2.3 28 6.4 44 1.0 .60 23 25 16 6.7 .7 .5 5.9 2.3 29 6.4 S.6 1.0 .60 25 20 6.7 >.8 .4 5.9 2.2 30 6.4 S.6 1.0 83 ------24 16 6.7 .8 .3 5.9 2.4

MEAN 6.54 6.20 25.9 12.6 8.83 101 13.2 6.98 6.69 6.66 8.46 7.82 MAX 6.6 6.2 7.5 7.5 80 131 .80 .47

CKL YR 1969 TOTAL 59,527 40 MEAN 163 MAX 8,340 MIN .80 AC-FT 118,100 VtNTURA RIVER BASIN

DRAINAGE ARLA.--15.6 sq

PERIOD OF RECORD. --October 1928 to Septe 1932, October 1933 to September 1970. October 1953, pub- ija." GAGE. --Water-stage re b 1966 D f 1 14* 02 f b nsea at different datum. AVERAGE DISCHARGE. --41 years, 10.4 cfs (7,530 acre-ft per year); median of yearly mean discharges, 4.2 cfs

Date T me Disch. G.H. Da e Time Disch. G.H. Date Time Disch. G.H. Nov. 16, 1965 2400 850 4.20 Ma . 12, 1967 2100 551 3.13 Jan. 21, 1969 0330 4,820 6.80 Nov. 24, 1965 0330 *2,900 7.37 Ap . 4, 1967 1830 148 2.31 Jan. 25, 1969 0600 8,440 a 10.0 Dec. 29, 1965 0630 1,570 5.57 Ap . 18, 1967 1030 216 2.49 Feb. 6, 1969 0200 2,310 4. "5 Ap . 21, 1967 1830 280 2.65 Feb. 24, 1969 2330 *9,440 a 11.0 Nov . 7 , 1966 1400 220 2.50 Apr. 5, 1969 1730 145 2.27 Dec. 2, 1966 2400 292 2.68 Nov. 21, 1967 1130 *68 1.99 Dec. 6, 1966 1400 *2,000 4.47 Mar. 8, 1968 0345 66 1.98 Mar. 1, 197C 0500 *516 3.58 Jan. 24, 1967 1400 640 3.25 a Fro. floodm arks.

Ktr yr Date Discharge Wtr yr Date Disc harge 1966 3ct. 3 -6, 21- 26, 1965 .20 1969 Oct. 1-12, 1968 1.0 1967 Nov. 2 , 1966 .70 1970 Sept. 1, 2, 9, 26-30, 1 970 1.0 1968 Aug. 28 -30, Sept. 9-12, 25, 26 .60 Pe riod of record : Maximum discharge, 9,440 cfs Feb. 24, 1969 (gage height, 11.0 ft, from f loodmark) , from 10.0 ft; minimum daily , 0.10 cfs for several days in some years.

COOPERATION. --Records 1 ' ' d d b G ological Survey. REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAK OCTOBER 1965 TO SEPTEMBER 1966 DAY

1 .30 37 12C 19 11 6.4 4.8 3.6 .2 . 1.2 2 .30 .50 31 °0 IB 11 6.4 4.3 3.3 .2 . 1.2 3 .20 .4C 28 67 17 11 6.4 4.3 3.3 .1 . 1.2 4 .20 .3C 26 55 17 10 6.4 4.6 3.3 .0 . 1.2 5 .20 .40 24 50 17 10 6.4 4.6 3.0 .8 . 1.2

6 .20 .40 22 46 22 10 6.0 4.3 3.0 .a . 1.2 7 .30 .40 21 43 19 9.B 5.7 4.3 3.0 .8 . 1.2 B .40 .50 21 41 18 9.8 5.7 4.3 3.3 .8 . l.C 9 .40 .40 20 38 17 9.8 5.7 4.B 3.3 .6 . 0 .80 10 .40 .4C 19 36 16 9.8 5.7 4.8 3.0 .6 . 0 .80

11 .40 .40 19 33 15 9.3 5.7 4.6 2.8 .6 1. 1.0 12 .40 13 .40 .40 17 28 15 9.3 5.4 4.6 3.0 .6 1. 1.3 1* .40 2.0 16 27 15 9.3 5.1 4.6 2.4 .6 . 0 1.2 15 .40 5.9 15 26 14 8.9 4.8 4.6 2.4 .6 .80 1.0 16 .40 252 15 25 14 8.9 4.6 4.6 2.4 .5 .80 1.0 17 .40 326 14 24 14 8.1 S.I 4.6 2.4 .4 .80 1.: 13 .40 208 13 24 14 8.1 5.1 4.3 2.1 .2 .80 1.2 19 .40 65 13 23 13 8.1 5.1 4.0 2.1 .2 . 0 1.3 20 .30 33 13 22 13 7.8 5.1 3.8 1.8 .2 1. 1.5

21 .20 21 12 ?2 12 .3 5.1 3.8 1.8 .2 . 1.3 22 .20 320 13 21 12 .8 S.I 4.0 1.8 .2 . 1.2 23 .20 416 13 21 12 .4 5.1 4.0 1.8 .2 . 1.0 24 .20 782 13 20 12 .4 5.1 3.8 1.8 .2 . .80 25 .20 208 13 19 12 .4 4.B 3.8 2.G .2 . 1.3 26 .20 12G 13 19 11 .4 4.8 3.8 2.0 .2 . 1.2 27 .30 84 13 18 11 .8 4.B 4.0 2.1 .2 . 1.2 28 .30 65 13 17 11 .4 4.8 3.8 2.2 .2 . 1.2 29 .30 51 770 17 .0 4.8 3.8 2.2 .4 . 1.3 30 .30 45 289 32 .0 4.B 3.8 2.2 .4 . 1.3 31 .30 165 21 .4 3.6 .4 .

MAX .40 782 770 120 22 11 6.4 4.8 3.6 .2 1.2 1.5 HIN .20 .30 12 IT 11 6.4 4.6 3.6 l.S .2 .80 .80 AC-FT 19 VENTURA RIVER BASIN

11116000 NORTM FORK MATILIJH CREEK AT MATILIJA HOT SPRINGS, CAL IF.--CONTINUED

DISCHARGE, IN CUBIC FEU PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 .2 .80 2.4 7. 1 8.4 27 4 7 9. 5.8 3.7 I .2 .7C 14 7. 0 8.4 27 4 6 8. 5.8 3.7 3 .2 .80 72 7. 9 8. 25 4 5 8. 5.8 3.7 4 .2 .C 14 7. 8 8. 48 4 5 8. 5,8 3.7 5 .2 .2 101 7. 7 7. 40 4 5 8. 5.4 3.7 6 .2 .9 7J2 7. 7 7. 31 3 5 8. 5.4 3.4 7 .2 5 133 7. 6 7. 40 3 5 8. 5.4 3.4 ,3 .2 .9 58 7. 5 7. 33 3 5 8. 5.4 3.4 9 .2 .7 38 6. 5 7. 30 3 4 7. 5.4 3.4 I ; .2 .8 30 6. 4 7. 31 3 4 7. 5.1 3.4 11 .3 .6 24 6. * 18 54 3 4 7. 4.8 3.4 2 . 3 .4 21 6. 4 289 4* 2 4 7. 4.8 3.4 3 .3 .1 19 6. 3 232 40 2 4 7. 4.8 3.4 4 .2 .9 17 6. 2 110 36 2 4 7. 4.8 3.4 5 .2 .9 17 6. 2 80 35 2 * 7. 4.B 3.1 6 .2 .9 15 6. 2 64 34 2 3 7. 4.4 3.1 7 .2 .9 14 6. 2 54 31 2 3 7. 4.4 3.1 8 .? .9 14 6. 1 47 81 2 3 7. 4.4 3.4 » .C .9 13 6. 1 41 68 2 2 6. 4.4 3.4 '- .0 .8 13 5. S 1 38 62 2 2 6. 4.4 3.4 1 .2 .8 12 5. i : 34 146 2 2 6. 4.0 3.4 2 . 2 .4 11 134 S 31 173 2 1 6. 4.0 3.4 3 .0 .4 11 21 J 30 110 2 1 6. 4.0 3.4 4 .80 .4 10 250 9.4 29 92 1 1 6. 4.0 3.4 5 .80 .4 10 110 1 28 64 I 1 6. 3.7 3.4 6 . J .4 9.4 5B J 25 76 IS I 6. 3.7 3.4 7 .2 .4 8.9 41 9.4 23 68 1 s 6. 3.4 3.4 e .6 8.9 33 8.9 22 64 1 0 5. 3 3.4 3.7 9 .0 .6 8.4 28 21 6C 1 9.4 5. ) 3.4 3.7 .60 .4 8. * 24 1 .80 - 7.9 22 21 ______l 5. S 3.4 ) 141.7 103.5 AN .13 . 4.57 3.45 X 1.3 57 702 25 ) 21 289 173 4 17 9. 5.8 3.7 N .80 .70 2.4 5. S 8.9 7.9 25 1 9.4 5. S 3.4 3.1 > 281 205

AC-FT 7,620 AC-FT 15,110

1 3.7 3.1 5.4 3.7 3.7 3.4 7.6 2.< 1.7 1.2 .80 .80 3 3.7 2.8 4.8 3.7 3.7 3.1 4.4 2.< 1.3 .0 .80 .80 4 5 3.4 3.1 4.4 6 3.1 3.1 4.4 3.7 3.7 3.1 3.7 2.< .5 .2 .70 .70

8 2.8 2.8 4.4 3.7 3.7 30 3.4 2. .7 .3 .70 .70 9 2.8 7.8 4.0 3.7 3.7 12 3.4 2. .7 .3 .7C .60 10 2.8 2.8 4.0 4.C 3.7 7.4 3.1 2. .5 .3 .70 .60 1 3.1 2.8 4.0 3.7 3.7 6.2 3.1 2. .3 .3 .70 .60 2 3.1 2.8 4.0 3.7 4.0 5.8 3.1 2. .3 .2 .80 .60 3 3.1 2.8 4.0 3.7 7.4 6.2 3.1 2. .2 .2 .0 .70 4 3.1 2.8 4.0 3.7 5.1 5.4 2.8 2. .2 .2 .0 .80 5 2.8 2.8 4.0 3.7 4.8 5.1 2.8 2. .2 .2 .0 1.0

6 2.8 3.1 4.0 3.7 4.8 4.8 2.8 1 1 .2 .2 .0 1.0 7 2.8 3.1 4.0 3.7 5.8 4.6 2.8 1 B .0 .0 .2 .80 8 3.1 3.4 5.8 3.7 5.4 4.4 2.B 1. .0 .80 .0 .80 C 3.1 8.4 5.1 3.7 4.B 4.0 2.8 1. .80 .80 .0 1.0

1 3.4 22 5.1 3.7 4.4 4.0 2.8 1. .70 .60 1.0 1.0 2 3.4 7.9 4.8 3.7 4.4 4.0 2.8 J^ .70 .60 . BC .80 3 3.4 5.8 4.8 3.7 4.0 3.7 2.6 1. .80 .80 .70 .70 4 3.4 5.1 4.4 3.7 4.C 3.7 2.6 1. 1.0 .80 .70 .70

7 3.4 4.C 4.4 5.4 3.7 3.4 2.4 1.0 .80 .70 .70

9 3.4 4.0 4.0 4.0 3.7 3.1 2.4 1. 1.2 1.0 .60 .80 1 3.1 4.0 4.4 3.4 1. .60 .TO TAL 99.7 135.7 137.9 116. 8 123.2 166.4 96.2 61. 36.20 31.40 25.00 23.20

X 3.7 22 5.B 5.4 7.4 30 T.6 2. 1.7 1.3 1.2 1.0 N 2.6 2.8 4.0 3.7 3.7 3.1 2.4 1- .70 .BO .60 .60

12,690 2,100 VENTURA RIVFR BASIN

11116000 NORTH FORK MATI1IJA CRIFK AT MATILIJA HOT SPRINGS, CALIF.--CONTINUED

DISCHARGE! I" CUBIC FEET PER SECOND, WATER VEAR OCTOBER 1968 TO SEPTEMBER 1969

1 . r 1. I, 1C8 268 34 19 12 7.0 4.8 3.4 2 .1" 1. I . 84 . 208 33 14 12 7.0 4.4 3.4 3 .1 1. 1. 80 184 31 19 12 7.C 4.4 3.4 4 0 1 . f 1 a 80 166 29 IB 12 7.0 4.4 3.4 <> .C 1. 1. 114 156 47 17 12 6.6 4.0 3.4 6 .0 1. j. 1, 5C 130 38 17 12 6.6 4.4 3.4 1 .1 1. 1 , 2? 108 30 17 11 6.6 4.8 3.4 X .0 1 . a 1. 73 102 28 16 11 6.2 4.8 3.4 t .0 1. 1. 45 95 27 15 11 6.2 4.4 3.4 U . : i. 1 , IS 9C 77 15 11 6.2 4.4 3.4 1 .c i. 1 1 95 82 25 15 11 6.2 4.4 3.4 2 .0 1. 1 , 82 76 25 15 11 6.2 4.4 3.4 1 .2 1 . 2. 76 70 24 14 10 6.2 4.8 3.4 4 .1 1. 4. I". 64 23 14 ' 1C 6.2 4.8 3.4 5 .5 2. 2, 90 60 23 14 10 6.2 4.4 3.4 6 .3 1. 2. 76 58 22 14 1. 5.8 4.4 3.4 7 .2 1. 2. 70 54 ?2 14 1C 5.8 4.4 3.4 a .2 1. . 2. 60 50 22 14 H> 5.B 4.C 3.4 q .2 1. a t 76 52 48 22 14 9.4 5.B 4.0 3.4 .2 1. 24 48 47 21 14 9.4 5.8 4.0 3.4

1 .2 1. 1, 13 48 47 21 14 8.9 5. 4.7 3.4 i .2 1. 42 47 46 21 13 8.9 5. 4.C 3.4 1 .2 1. BH 42 44 ?1 14 fl.4 5. 4.0 3.1 4 .2 1. 47 2, 10 41 21 12 8.4 5. 4.5 3.1 b .2 I. 4, 80 4, iZ 4C 2C 12 8.4 5. 4.0 3.1 fc .2 1. 1, 50 1, er. 38 20 12 8.4 5.1 4.C 3.1 7 .2 1. 50 16 36 19 12 7.9 4.8 4.0 3.1 S .2 I. 56 29 35 19 12 7.4 4.8 4.0 3.1 3 .2 1. on 34 19 12 7.4 4.8 3.7 3.1 .2 1. 59 34 19 12 7.0 4.6 4.0 3.1 1 .2 34 12 4.8 3.4

. 10,1 ' *ri I 16 1.1 1 32 v X .1 2. 4 ,98 4,42r 268 47 19 12 7.0 4.8 3.4 .0 I . 1. r 47 34 19 12 7.0 4.8 3.4 3.1 A -FT 72 8 0 20

DISCHARGE! IN CUPIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO SEPTEMPER 1970

1 . .8 3.5 3.1 3, 739 .0 3. 2.6 1.9 1.3 1.0 2 ..81. 3.1 3. 5 .C 3. 2.4 1.7 1.3 1.0 3 ..83. 2.8 3. 3 .6 3. 2.4 1.7 1.3 1.2 * . .83. 2.8 3. B .2 3. 2.4 1.7 1.3 1.2 i ..13. 2.6 3. 2 .8 3. 2.4 1.7 1.3 1.2 6 .1 3. 2.6 3. 4 .8 3. 2.4 1.7 1.3 1.2 7 .9 3. 2.6 3. 4 .8 3. 2.4 1.9 1.5 1.2 a ..83. 2.B 3. 1 .8 3. 2.4 1.9 1.5 1.2 -> ..13. 8.0 5. 7 .4 2.B 2.6 1.7 1.5 1.0 1 . .B 3. 10 13 5 .1 2.8 2.4 1.9 1.5 1.2 11 . .8 3. 6.2 11 4 .1 2.8 2.4 1.9 1.5 1.2 2 .4 3. 5.1 7.0 3 .8 2.8 2.4 1.9 1.5 1.2 3 . .0 3. 5.1 6.2 11 .8 2.8 2.6 1.9 1.5 1.2 4 .f1 3. 4.8 5.8 11 .1 2.8 2.6 1.7 1.3 1.2 S ..73. 4.4 5.4 10 .1 2.8 2.4 1.7 1.3 1.2 6 . .7 3.4 7." 5.1 10 .1 2.8 2.6 1.7 1.3 1.2

8 . .7 3.4 5.8 5.1 10 .8 2.B 2.6 1.7 1.3 1.2

1 3.4 3.4 3.4 4.8 4.4 B.9 .0 2.6 2.6 1.5 1.2 1.3

.4 2.8 1.9 1.5 1.2 1.0 E 3.4 3.4 1.1 4.C 136 7.0 ).7 2.8 1.9 1.5 1.2 1.0 9 3.4 3.4 3.1 4.J 7.0 >.4 2.6 2.1 1.3 1.3 1.0 ).4 2.6 2.1 1.3 1.3 l.C I 3.1 3.1 3.7 6.6 ?.6 1.3 1.1 TAL 1C:.: 123.0 105.0 141.8 271.7 744.3 14 >.7 88.5 71.3 50.9 41.0 34.8 X 3.4 12 3.5 1C 136 239 !.0 3.4 2.6 1.9 1.5 1.3 i.4 2.4 1.9 1.3 1.1 1.0

R YR 1970 TOTAL 1,918.0 MEAN 5.25 MAX ?31 MIN l.C C-FT 3,800 11116550 VENTURA RIVER NEAR MEINERS OAKS, CALIF. County, on right hank Prior to Oct. 30, I960,

DRAINAGE ARhA.--76.4 sq mi.

PERIOD OF RECORD.--May 1959 to Septembe GAGE.--Water-stage recorder. Datum of

nd, gage height ng table:

Wtr vr Date Discharge G.H. Date , Pischa 1966 Dec. 29, 1965 7,900 ^.20 Long periods 1967 Dec. 6, 1966 4,640 6.00 Many davs 1968 Oct. 10, 1967 101 1.96 do. 1969 Jan. 25, 1969 28,000 Long periods 1970 Mar. 2, 1970 258 5.20 Many days

roont

ity, 3,800 acre-ft). Flow up to 500 cfs diverted since May 1959 at Roble

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

NOV DEC JAN FFB MAR APR MAY JUN JUL

r 50 .3 11 8. 4.7 11 1.4 ?3 10 8. 5.7 11 1.2 21 .0 14 9. 6.3 11 1.0 5 24 13 10 6.3 11 .90 V 6.1 13 9. 5.7 11 .60 ,, 8.2 l\ 9. 5.2 11 .30 16 13 9. 12 11 .20 ^ 18 12 9. 17 11 .20 21 1 12 9. 17 12 .20 16 1 12 8. 19 14 .10 18 .4 12 7. 17 13 .30 18 12 7. 17 12 .20 T 33 .6 12 7. 14 11 .40 c 39 .3 11 6. 11 10 .60 1.6 39 .3 11 6. 11 10 .40 B3 40 .3 15 6. 11 9. 0 199 21 .2 i: B. 11 8. .1C 16C 0 .7 IG 8. 12 7. .10 74 3 .7 9. B. 10 6. u 17 2.6 .3 8. B. 6.9 7. C 18 5.7 .3 6. 8. B.2 10 C 239 6.3 .2 8. 7. 12 10 o 273 6.9 8. 6. 12 10 0 1,880 8.2 8. 7. 12 10 \j 279 8.2 B. B. 12 10 0 101 8.9 8. 8. 12 10 C 79 1 3 .8 8. A. 12 9.6 C 3C 17 1 8. 8. 12 8.9 0 21 3,610 1 6. 12 7.5 C 25 768 1 5. 12 7.5 C 10B 1 7.5 C

116 160 6 5B 10.7 B.O 11.2 10.0 5 3 .26 1,880 3,610 14 14 1 19 14 1.4 0 ? 0 8.9 4. 4.7 6.9 0 30 16 11116550 VENTURA RIVFR NEAR METNLRS OAKS, CALIF.--CONTINUr.D

DISCHARGE, !N CUBIC FEET °fR SECOND, WATER VFAR OCTOBER 1966 TO SEPTEKRER 1967

MOV DEC JAN FEE MAR APR MAY JlIN JUL

0 C 4.7 9.6 1 16 12 5. 12 12 11 8. c. 7.2 9.6 i. 17 12 6. 12 11 10 8. 0 (. 17 11 C 14 11 9. 12 1C 9.6 7. .10 i 24 14 i. 1C 11 6. 12 1C 9.6 6. .90 14 18 0 9.6 11 7. 12 6.9 6.9 5.

, 1,15: 18 u 8.9 9.6 B. 12 8.9 1C 5. 25 2 277 18 C 9.9 6.9 6. 12 6.9 13 5. 5.2 1 6.C 13 0 8.9 6.2 6. 12 1C 13 4. 2. u .! 14 19 v 6.9 7.5 9. 12 12 12 5. 1.8 2C 26 C 6.9 7.5 3. 12 1C 12 6.

I. 6 21 8.2 3 12 2.6 6. 12 11 11 5. 1.6 12 11 1 23 0 6. 12 14 11 5. .43 C 7.5 C 16 0 6. 15 14 11 5. 0 0 7.5 3.7 16 5.6 9. 17 14 1C 5. 0 c 7.5 8.9 16 6.9 9. 17 15 6.2 5. 3.6 r 6.9 1J 13 6.2 9. 17 13 8.2 5. 1.2 13 6.9 9.6 9.6 7.5 6. 17 11 8.2 5. 1.0 20 6.9 9.6 6.9 2.6 1 17 14 8.2 5. .90 80 6.3 9.6 8.8 : 4 17 14 6.2 5. 0 60 5.7 8.9 11 C * 17 16 6.2 4. 27 5.7 B.9 11 16 4 17 13 6.2 4. 22 35 3.9 13 1.5 3 17 13 6.9 4. 14 0 1(1 13 C 4 17 13 6.9 4. 14 49 11 14 C 4 17 12 6.9 4. 14 1.9 1? 14 ) 4 17 13 6.3 4. 14 0 11 14 " 4 17 13 6.3 4. K r 11 14 0 6 20 13 6.9 3. ' 1C 0 14 12 0 4 2C 13 6.9 3. 10 C. 12 U 3 14 13 6.3 3. 0 C 12 0 ;* 14 13 7.5 3. 0 - 9.6 0 12 12

TOTAL 448 376.7 278.6 157. MEAN MAX 25 1 1,150 49 14 23 16 16U 2C 116 13 6. C 0 ^ 0 C 6.6 C 5.5 12 8.

,15C MIN ! AC-FT 7,200 ,150 MIN 0 AC-FT 9,293

1 3,7 4.7 0,6 tt, \ S 1" 11 i.3 1.6 ? 1.? 5.? H.9 S,2 c o

i.? 6,3 «,9 S.7 1 ",(, 11 1,7 .00 3.7 h.9 8.9 S.7 1 ID 3.7 .90 \? 10 3.7 .90 1 i!? y|s a'.? 6^ ' 11 10 3,7 1.0 in a. a h.9 n.i h .9 ! 10 9,» 3,7 .90

.10 h,9 fl,2 6,0 II , 1 0 9.6 II,? ,70 . l? 1 J ID 1,7 .70 13 ?.7 K.2 H.9 3)7 ti 9.fc 10 1,7 .70 . 1" 3.3 10 H.9 3.7 ^ in 10 ",7 i.o IS 3,0 7,5 7.J 1.7 S 10 10 «,? 1,0

16

21 ?,6 12 7.5 S.2 u 9,h 7. 2.3 .10 0 i? 9,d ». 2.6 ,10 0 2!>> 15 - o!3 si? u 9,6 1, 2.3 .10 0 ".9 12 S.7 5,? u 9.6 i, 1.« .50 n 2S ?1 1? S.7 S.2 1 10 3. I.B .20 0

«.9 11 h.a S.? 1 0 J. l.B .?0 0 ».2 II 7.5 6.3 i 0 1 , 1.6 , ?0 0 7.S |0 7,5 n.2 1 0 «, 1.0 ,?0 . t 29 6.0 |(1 7.9 h.3 1 0 3. 1.1 .20 0 JO 6,3 9,8 S.2 S.7 -- - --0 3,1 ,1 .SO 0

MN 21 t» 9.6 B.2 1 13 11 6.3 1,6 .3 0 U.7 5.2 3.7 i 9,h S.O 1.1 .10

WT» Yk |1(,B MT»L 1,770,00 MUM 1.81 M»K 21 MIN 0 AC-F1 5,510 VENTURA RIVXR BASIN

11116550 VFNTURA RIVER NEAR MrlNI-RS OAKS, CALIF. --CONTINUED <~,f , I*i fll'UC FFfT PFN SFC'IMl, «alf« Yf«» ncTURER 1968 III SEPTF

.? .30 1 .(1 .5 8.9 O 0.8 a , H

11 n .0 .?1 .9 0 IB 'i,8 a , H 1.9 \f n ,90 ,10 .n n p 8 0 1,8 i|,B '1.1 ,60 . ao l.a b . 0 (1 n a, 8 a,8 'J.I l« .10 .00 .70 a,? 5.0 o 0 a. 8 0.9 s .10 ,6 1,0 5, n 1,0 o 0 a , 8 a , 9 1.7

1" .JO ,i 7.0 1.8 0 0 0 0 . A 11 . 9 ,ao 1.6 l.a 5i o 0 I s .10 » ao 1.0 2,1 ?? o 5.'l 11 0 0 5.0 a. 9 .30 1.? .10 158 277 0 0 5.P 5,0 1 .0 1 .10 "98 7,250 0 0 5.6 5.0 2S 0 i 1.611, ion i 0,600 o 0 5.0 5,0 6.1

?h 0 ?,6 5,?50 2.910 0 2.0 5..J 5,0 6.1 c? 7 0 5.0 5.0 6.5 2» 0 ,ao 1,8 1,16" 1 , 130 O 3.9 1 . S 5,0 6.7 3,9 1.8 5.0 6.8 in o 3.9 a. 8 5,0 6, A

0 0 17,6 1a6,7 151.7 lao,6 E"» ,0^i 0 0 ,59 1.73 1.89 a. 69 J.a i.o 11,100 10,600 8«a 0 n 3.9 5.8 5,0 6.8 0 0.70 0 0 000 1.9 a, 8 1 . o C-M 1,0 0 0 35 ?91 301 279

NOTE. NO GAGE-HE IGHT RECORD JAN. 20 TO SEPT. 30.

n

IV UC1 JIJL »'IG SEP

1 6.8 2 6, a 0 7.0 0 2.0 So 6.0 7.5 .0 13 0 7.0 0 1.6 ,}a .0 2.5 1,6 2.0 II 6,8 0 7,0 0 l.a 11 3.5 6.0 . 6 2.5 1,6 1 .6 5 6,8 2.9 7.5 ,9 2.5 1,0 0

6 6.8 8 7.0 0 1.8 23 2.1 6,9 2.5 2,1 0 7 6,0 0 7.0 0 1.9 u , 2 1,9 0,0 1.5 ?.0 0 8 n.fl 1 S3 0 1.8 3,0 1.8 0.8 1.2 2.1 0 2 60 0 1,7 10 1 6,6 .1 2,8 3.5 0 6^8 1 52 0 1.5 8.1 5 1" .0 3.9 7, a 0

1 6.8 0 85 0 1.7 6.9 3 1.2 ,76 2.1 0 1 10 0 68 IS 1.7 13 5 0.5 1.8 ,07 0 a i o 0 ao 11 1.721 5 1.5 1,1 .15 0 5 10 0 27 10 1.7 la 5 a , 6 1.1 1.5

6 10 9,0 ?7 '1,9 1.6 15 6 2.5 l.l .7a 0 7 10 9,0 75 ,00 d\ 15 6 1,1 .96 1.7 0 8 10 9,0 80 29 19 11 B,B 5.0 l.i ?.6 0 9 10 9.0 68 1 1 2.8 8.7 7.7 5,9 ,1 .8? 1.1 0 0 10 .0 1.0 .58 0

1 10 «,5 3,0 .00 1,7 0.2 0,6 7.8 .2 1,0 .28 ? 10 8.5 12 ,00 1.2 3.? 5.6 0.0 .6 .79 .99 0 3 10 8.5 ?5 ,ao 1,0 2.S .71 .65 0 a 10 8,6 10 ,00 1.2 7.9 5^6 5J7 !i 1.1 .19 0 5 10 0

6 10 8.0 7.0 .98 .65 8,9 2.1 5.? 1.6 .02 0 7 10 8.0 0 .2 1.5 8,0 1,7 0.7 .0 1.7 .20 0 8 10 >0 0 .8 10 5.8 15 0.5 .8 3.1 .15 0 9 10 7.0 0 .5 5,1 ?9 0.0 ,6 1.1 .08 0 0 10 7.0 0 .a ...... o.o 2(1 2.9 .6 .92 .10 0 1 10

18,6 AN 8,76 1,6 27.

NOTE. NO GAGE-HEIGHT RECORD OCT. 1 TO NOV. 4, NOV. 10 TO DEC. 26. VENTURA RIVER BASIN

11117500 SAN ANTONIO CREEK AT CASITAS SPRINGS, CALIF, LOCATION.--Lat 34°22'49", of bridge on U.S. Highway 399, 0.2 ile upstream from mouth and 0.9 mile north of Casitas Springs. DRAINAGE AREA.--51.2 sq mi. PERIOD OF RECORD.--October 1949 to Septembe 1970. GAGE.--Water-stage rec Datum of gage is 307.25 ft above mean sea level (levels by Ventur ounty Flood Control District). to Jan. 30, 1962, at datum 0.30 ft higher. AVERAGE DISCHARGE.--21 years, 11.6 cfs (8,400 acre-ft per year); median of yearly mean discharges 1.6 cfs (1,200 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (200 cfs), water years 1966-70 Date Time Disch. G.H. Date Time Dusch. G.H. Date Time Disch. G.H. Nov. 17, 1965 0230 964 6.93 Jan. 24, 1967 1SOO 2,490 7.56 Jan. 25, 1969 0800 16,200 a!4.30 Nov. 24, 1965 0330 *6,800 10.80 Apr. 11, 1967 0200 332 5.68. Feb. 6, 1969 0200 3,030 8.15 Dec. 29, 1965 0730 3,620 9.20 Apr. 21, 1967 2230 218 5.43 Feb. 25, 1969 0100 11,500 10.70 Apr. 2, 1969 2400 227 5.08 Nov. 7, 1966 0700 560 6.48 Nov. 21, 1967 1300 340 6.02 Apr. 5, 1969 1700 470 5.67. Dec. 3, 1966 0045 746 6.79 Mar. 8, 1968 0200 388 6.10 Dec. 6, 1966 1500 7,280 11.02 Mar. 1, 1970 1000 1,040 5.67 Jan. 21, 1969 0200 7,020 10.90 Mar. 4, 1970 2000 996 5.40 a From inside gage. Annua 1 minimum daily d ischariie, water years 1966-70 Wtr yr Date Discharge Wtr yr Date Di 0 1969 Many d 0 1967 do. 0 1970 Sept. 30, 1970 .64 1968 Many days 0 ' Period of record : Maxii»um dis charge, 16,200 cfs.Jan. 25, 1969 (gage height, 14.30 ft , from inside g ag»), from rating curve e : peak fl flow for in ea REMARKS.--No regulation above station; pumping from wells along creek for irrigation. COOPERATION.--Records furnished by Ventura County Flood Control District and reviewed by Geological Sur

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV HAY JUN JUL AU 1 D 9.0 100 6.5 .2 .5 .60 .20 2 0 7.0 70 6.2 .0 .4 .60 .20 3 0 5.4 50 5.8 .8 .4 .60 .20 4 0 5.1 40 5.4 .6 .3 .60 .20 5 0 4.8 30 5.0 .4 .3 .60 .20 6 0 4.5 17 25 .3 .3 .60 .10 1 0 4.2 15 12 .2 .3 .60 .10 a D 4.1 13 10 .1 .2 .60 .10 9 0 4.0 1 8.5 .0 1.2 .60 .10 10 c 3.9 7 8.0 .0 1.2 .60 .10 11 0 3.8 7.5 .0 1.1 .60 .10 12 D 5.0 7.0 .0 1.1 .60 .10 13 0 3.7 6.5 .0 1.1 .60 .10 1* 0 3.5 6.0 .0 1.0 .60 .10 15 0 3.3 5.5 .0 1.0 .60 .10 16 54 3.1 5.1 .9 .90 .60 .10 17 273 2.9 5.0 .8 .90 .60 .10 18 220 2.8 4. 4.9 .7 .BO .60 .10 19 24 2.7 4.9 .6 .80 .60 .10 20 4.6 2.6 4.8 .5 .80 .60 .10 21 1.5 2.5 4.7 .5 .80 .50 0 22 488 2.5 4.6 .4 .80 .50 0 23 411 2.4 4.6 .4 .80 .50 0 24 1,510 2.4 4.5 .2 .80 .50 0 25 236 2.4 4.5 .1 .80 ;so 0 26 62 2.3 4.4 .0 .80 .50 0 27 35 2.3 4.3 .9 .80 .40 0 28 24 2.5 4.3 .8 .70 .40 0 29 IB 1.520 .7 .70 .30 0 3D 12 400 20 ~~»-»*. .6 .70 .30 0 31 200 13 ------.5 .30 TOTAL 0 3,373.1 2,224.7 499. IBS. 5 B .2 30.30 16.70 2.50 MEAN 0 112 71.8 16. 6.63 2 75 1.01 .54 .083 MAX 0 1,510 1,520 ' 1C 25 .2 1.5 .60 .20 NIN 0 0 2.3 4. 4.3 .5 .70 .30 0 AC-FT 0 6,690 4,410 9« 368 69 60 33 5.0 CAL YR

NOTE. NO GAGE-HEIGHT RECORD EXCEPT NOV. 16-25, DEC. 29. VENTURA RIVER BASIN

11117500 SAN ANTONIO CREEK AT CASITAS SPRINGS, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TD SEPTEMBER 196T

1 0 .30 3. 12 5. 18 41 19 13 7.9 2 0 10 3. 10 5. 13 40 19 13 7.8 3 0 164 3. 9.8 4. 9.8 39 18 13 T.T 4 0 20 3. 9.3 4. 20 38 18 13 7.6 5 C 474 3. 8.8 3. 16 36 17 13 7.6 6 J 2,150 3. 8. 3. 13 33 17 13 7.5 7 60 200 3. 8. 3. 20 32 17 12 7.5 8 C 50 3. 7. 4. 13 30 16 12 7.5 9 0 25 3. 7, 4. 13 29 16 12 7.4 U C 15 3. 7. 4. 15 29 15 12 7.4 11 0 10 3. 7> 9.3 110 28 15 12 7.4 12 0 9. 3. 6. 25 36 27 15 11 7.4 13 r 8. 3. 6. 84 25 27 15 11 7.3 1* C 7, 3, 6. 56 21 26 15 11 7.2 15 0 7. 3. 6. 32 20 26 15 11 7.1 16 0 6. 3. 6. 18 20 25 15 11 7.C 17 0 6. 3. 6. 12 18 24 15 11 6.9 IB C 6. 3 B 6. 10 53 24 15 11 6.8 19 0 6. 3. 6. 9.8 65 24 14 10 6.6 20 0 5. 3. 6. 9.3 54 24 14 10 6.5 21 1.5 5. 3.4 5. 9.3 100 23 14 1C 6.4 22 .50 5. 400 5. 9.3 140 24 14 9. 6.3 23 0 5. 30 5. 8.8 106 23 14 9. 6.2 24 0 5. 794 5. 8.8 10? 24 14 9. 6.0 25 0 4. 150 6. 8.3 83 25 13 8. 5.7 26 1 4. 40 6. 8.3 65 26 13 8. 5.6 27 t. 4. 35 5. 7.8 54 25 13 8. 5.4 28 0 4. 30 5. 7.3 50 24 13 8. 5.2 ?9 4. 25 6.5 46 22 13 8. 5.1 31 0 3. *v 6.1 44 20 13 8. 4.9 31 3.8 15 21 20 TOTAL 0 62.00 3,231.90 1,610.7 201. 410.4 1,360.8 858 454 331. 207.7 12 MEAN 0 2.C7 104 52.0 7.2 13.2 45.4 27.7 15.1 10. 6.70 4 MAX 0 60 2,150 794 1 84 140 41 19 1 7.9 HIN 0 0 .30 3.4 5. 3.9 9.6 20 13 6. 4.8 AC-FT 0 123 6,410 3,190 400 "814 2.700 1,700 901 658 412 8,160

NOTE. NO SAGE-HEIGHT RECORP DEC. 7 TO JAN. 23, JULY 7 TO SEPT. 30.

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 RAY OCT NOV DEC JUN JUL 1 3.B 2.9 6.8 3.6 4.6 3.8 19 3.5 1.8 1.0 2 3.8 1.6 .80 3 .80 4 .80 5 1.6 .80 6 1.4 .70 7 3.5 2.9 4.0 3.B 5.1 64 4.6 3.2 1.4 .70 8 3.5 2.9 4.0 4.0 5.4 126 4.6 3.2 1.3 .70 9 3.4 2.9 3.8 4.0 5.4 20 4.3 3.2 1.3 .70 10 3.4 2.9 3.8 5.1 6.0 12 4.3 3.2 1.3 .70

11 1.3 .60 .30 12 1.1 .60 .30 13 3.3 2.9 3.8 4.3 7.6 12 4.2 3.0 1.1 .60 .30 14 1.1 .50 .30 15 3.3 2.9 3.8 4.0 4.8 6.4 4.2 2.8 1.1 .50 .30 16 2.8 1.1 .50 17 .50 18 3.2 2.9 10 4.0 6.4 5.4 4.0 2.6 1.1 .40 19 3.2 49 8.0 4.0 5.4 5.1 4.0 2.4 1.1 .40 20 3.2 29 1.1 .35 21 3.1 75 4.0 4.0 4.8 4.8 4.0 2.4 1.1 .35 22 3.1 11 3.8 4.0 4.6 4.8 3.8 2.4 1.1 .30 .15 23 3.1 6.8 3.8 4.0 4.3 4.8 3.8 2.4 1.1 .30 .15 24 1.1 .30 .15 25 3.0 4.6 3.6 4.0 3.B 4.8 3.8 2.0 1.0 .30 26 3.0 4.3 3.8 4.3 3.8 4.8 3.8 1.8 1.0 .20 27 1.8 1.0 .20 28 3.0 .20 29 1.8 1.0 .20 .07 30 2.9 21 3.6 4.6 4.6 3.5 1.8 1.0 .20 .07 31 2.9 3.6 5.4 4.6 1.8 .20 .05 TOTAL 101.9 268.8 135.1 132.4 14S.5 362.8 144.3 82.7 36.5 15.40 .11 MEAN 3.29 8.96 4.36 4.27 5.02 11.7 4.81 2.67 1.22 .SO .004 MAX 3.8 75 10 6.4 9.2 126 19 3.5 1.8 1.0 .05 MIN 1.8 1.0 .20

HTR YR 1968 TOTAL 1,431 .27 MEAN 3.91 MAX 126 MIN 0 AC-FT 2,840 VENTURA RIVER BASIN

11117500 SAN ANTONIO CREEK AT CASITAS SPRINGS, CALIF.--CONTINUED

DISCHARGE,

DAY OCT MAY JUN JIM. AUG SEP

I 0 0 .09 .90 81 239 70 31 20 13 6.9 7.8 2 0 0 .09 .90 56 230 76 31 20 13 6.9 7.3 3 0 0 .12 .90 44 221 84 31 19 13 8.3 7.8 A 0 0 .12 .80 40 215 60 31 19 14 9.3 6.9 5 0 0 12 6.5

6 0 0 .17 .80 977 200 74 32 19 13 14 6.9 7 0 0 .17 .60 243 194 62 30 20 13 12 6.1 8 0 0 .17 .60 185 185 59 29 20 13 4.6 6.1 9 0 0 .17 .60 167 176 56 28 20 13 .2 6.1 1C 0 0 .17 .60 90 170 53 27 20 13 .3 6.1

11 0 0 .23 .60 72 158 50 27 19 15 .8 6.1 12 0 0 .23 26 18 13 .3 6.1 13 0 0 .23 .60 51 119 45 26 18 12 .3 6.1 14 .12 0 .29 11 45 115 42 26 17 13 .3 6.1 15 .04 .23 .53 1.7 112 112 41 27 17 10 .3 6.1

16 11 7.3 6.5 17 .04 10 6.9 6.5 18 .04 .23 .53 5.6 64 98 39 25 16 11 .9 6.1 19 .04 .23 .53 715 62 94 37 24 16 10 .5 6.1 20 .04 .12 .53 650 57 90 37 24 15 11 .1 6.1 21 .06 .12 .53 1 ,680 78- 84 33 22 16 10 .1 6.1 22 .04 .09 .53 359 108 81 33 21 15 11 .1 6.1 23 .04 .09 .53 131 1,380 77 33 20 15 10 .5 5.7 24 .03 .09 14 11 .7 5.7 25 .02 .09 2.6 10 ,400 3,660 74 33 21 12 11 .7 5.7 26 .01 .09 2.1 2 ,780 746 74 33 21 13 11 5.7 5.0 27 0 .12 1.2 945 6.1 5.0 28 0 .12 1.2 336 388 72 30 20 13 10 6.5 4.6 29 0 .12 1.0 203 72 30 20 14 9.3 6.9 4.2 30 0 .12 1.0 140 72 30 20 14 10 7.3 4.2 31 0 1.0 121 72 20 9.3 7.3

TOTAL .56 222.1 181.7 MEAN .018 .079 .58 623 455 129 47.9 25.3 16.8 11.6 7.16 6.06 MAX 239 103 32 20 15 14 7.8 MIN 0 0 .09 .60 40 72 30 20 12 9.3 3.3 4.2 AC-FT 1.1 4.7 713 441 360 CAL YR 1968 TOTAL 946.40 MEAN 2.5 MAX 126 MIN 0 AC-FT 1 ,880

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEM ER 1970 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 4.6 3.9 4.2 4.2 3.6 318 7.3 4.2 2.8 1.7 1.3 .89 2 5.0 3.9 4.6 4.2 3.6 131 7.3 3.6 3.0 1.3 1.3 1.0 3 5.0 3.9 4.6 3.9 3.9 34 6.5 3.6 3.0 1.5 1.3 1.0 4 4.6 3.6 3.9 3.9 3.9 152 6.5 3.9 3.3 1.7 1.3 1.2 5 4.6 3.9 4.2 4.2 4.2 84 5.7 3.9 3.3 1.7 1.5 1.2 6 4.2 38 3.9 4.2 4.2 31 5.7 3.9 3.0 1.9 1.3 1.0 8 4.6 6.9 4.2 4.6 4.2 17 6.1 3.9 3.6 1.9 1.3 1.0 9 4.6 6.1 4.2 28 17 15 5.7 3.9 3.3 2.1 1.2 1.0 10 4.2 5.7 4.2 39 43 13 5.7 3.9 3.0 2.3 1.3 .89 11 4.2 5.3 4.2 10 20 12 5.7 3.9 2.8 1.9 1.5 .89 12 4.2 5.0 3.9 7.8 9.3 12 5.3 3.9 2.B 2.3 1.3 .89 13 4.2 4.6 3.9 6.1 7.3 11 5.7 3.6 2.6 1.9 1.3 1.0 15 1.0

16 4.2 4.2 3.9 35 1.0 17 2.8 1.7 1.0 1.0 19 1.3 1.2 20 1.5 1.5

22 3.9 4.2 3.9 5.3 4.2 8.3 5.3 3.3 2.3 1.5 1.5 1.2 23 1.5 .89 25 1.0

26 .76 27 1.2 .76 28 .76 29 .76 30 .64

TOTAL 136.1 54.1 39.9 29.83 MEAN 4.39 .99

MIN 1.3 1.0 .64 AC-FT 270 344 250 496 850 1,990 335 221 158 107 79 59

5,160 VENTURA RIVER BASIN

11117600 COYOTE CREEK NEAR OAK VIEW, CALIF.

from Los Padres National Forest boundary, 0.6 mile upstream from Poplin Creek, and 4.2 miles northwest of Oak

DRAINAGE AREA.--13.2 PERIOD OF RECORD.--Oc GAGE.--Water-stage corder. Datu f gage is 560.47 ft (revised) above mean sea level (Bureau of Reclamation bench mark). AVERAGE DISCHARGE.--12 years, 6.73 cfs (4,880 -ft per year); median of yearly mean discharges, 1.9 cfs (1,400 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height et). Annual maximum discharge (*) and peak discharges above base (ISO cfs), 1966-70 Date Time Disch. G.,H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 16 , 1965 2230 824 5..89 Dec. 3, 1967 0045 620 5.74 Feb. 15 , 1969 180 Nov. 24 , 1965 0245 *4,470 9..10 Mar. 8, 1968 0400 *426 5.04 Feb. 24 , 1969 2400 6,010 alO.2 Dec. 29 , 1965 0700 1,670 7. 03 Jan. 19, 1969 1900 3,740 8.93 Mar. 1 , 1970 0245 Dec. 6 , 1966 1445 *4,430 9. 08 Jan. 25, 1969 0645 *8,000 a!2.00 Mar. 4 , 1970 1945 Jan. 24 , 1967 1330 2,110 7. 72 Feb. 6, 1969 b600 - a From floodmarks Annu Wtr yr Date Discharge Wtr yr Date 1966 Oct. 1-13, 16-30, 1965 0 1969 Oct. 1- 3, 1968 1967 Oct. 2, 5- 25, 1966 .10 1970 Sept.26- 28, 1970 1968 Sept.26, 27 , 1968 .13 Period of rec ord: Maximum di scharge, 8,000 cfs Jan. 25, 1969 (gage he ight, 12. 00 ft, from 1 gage he iEhts

REMARKS.--Records good except those for 1969, which are poor. No gage-height record Jan. 25 to May 29, 1969. No

COOPERATION.--Three discharge measurements furnished by Ventura River Municipal Water District. DISCHARGE, IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN I EB MAR APR MAY J JN JUL AUG SEP

1 0 .1C 7.5 45 .2 2.8 2.0 .1 90 .50 .30 .20 ? 0 .10 6.7 27 .5 2.8 2.0 .1 90 .50 .30 .20 3 0 .10 5.B 20 .0 2.7 2.0 .1 90 .50 .30 .20 4 0 .1C 5.4 17 .7 2.6 2.1 .1 30 .50 .30 .20 5 0 .10 4.8 14 .8 2.7 2.0 .0 30 .50 .20 .20

6 a .10 4.4 13 1 2.6 1.8 .0 30 .50 .30 .20 7 c .1C 4.0 11 .8 2.5 1.8 .0 30 .50 .30 .20 8 a .10 3.9 10 .0 2.5 1.9 .0 30 .40 .20 .20 9 0 .10 3.9 9.3 .4 2.5 1.9 .0 30 .40 .20 .10 K a .1C 3.7 8.2 .1 2.5 1.9 .1 30 .40 .20 .10 11 c .10 3.5 7.4 .7 2.4 1.7 .1 30 .40 .20 .20 12 0 .10 4.B 7.2 .6 2.5 1.6 .1 30 .40 .20 .20 13 a .10 a .40 .20 .20 14 .10 .10 3.5 6.5 .3 2.4 1.5 .1 0 .40 .20 .10 15 .1C .20 3.4 6.2 .1 2.4 1.4 .1 0 .40 .20 .10

16 a 93 3.1 5.8 .0 2.4 1.% .1 0 .40 .20 .10 17 a 120 3.0 5.6 .9 2.3 1.4 .0 0 .40 .20 .10 18 3 60 2.B 5.4 .8 2.3 1.5 .0 a .40 .20 .10 19 a i 2.7 5.2 .7 2.3 1.5 .0 . a .40 .20 .10 20 a .1 2.6 5.2 .6 2.3 1.5 .90 a .40 .20 .10

21 0 .90 0 .40 .20 .10 22 0 12 2.3 4.8 .2 2.2 1.4 .90 0 .40 .2C .10 23 a 12 2.2 4.6 .2 2.2 1.3 .90 0 .30 .20 .10 24 a 49 2.3 4.4 .1 2.2 1.3 .90 0 .30 .20 .10 25 a 6 2.3 4.2 .1 2.3 1.3 .90 0 .30 .20 .10

26 0 29 2.3 4.0 .0 2.4 1.2 .90 0 .30 .20 .10 27 0 IB 2.2 4.0 .9 2.4 1.2 .90 0 .30 .20 .10 28 0 13 2.3 3.7 .8 2.4 1.3 .90 a .30 .20 .10 29 0 11 663 3.7 2.3 1.2 .90 a .30 .20 .10 30 a 8 .3 147 25 2.3 1.3 .90 >a .30 .20 .20 31 . 10 83 8.5 2.1 .70 - .30 .20

6.80 4.20 MEAN .39 .22 .14 MAX .13 495 663 45 14 2.8 2.1 1.1 >a .50 .30 .20 MIN a .10 2.2 3.7 .8 2.1 1.2 .70 >o .30 .20 .10 AC-FT .6 2, 360 1,970 611 59 149 94 61 »2 24 13 8.3 VENTURA RIVER BASIN

11117600 COYOTE CREEK NEAR OAK VIEW, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 .20 .20 .60 3.2 1 4 3.5 8.2 13 4.1 2.9 1.4 .90 2 .10 .20 28 3.2 1 3 3.5 8.3 12 4.1 2.9 1.4 .90 3 .20 .20 143 3.1 1 I 3.5 6.6 11 4.0 2.9 1.5 .90 4 .20 .20 10 3.1 1 1 3.5 16 11 3.9 2.9 1.5 .89 5 .10 .20 169 3.0 9.6 3.3 13 10 3.9 2.9 1.5 .89 6 .10 .30 1.120 3.0 8.9 3.2 9.8 9.5 3.9 3.0 1.4 .85 7 .10 13 125 3.9 8.4 3.2 13 8.8 3.8 2.9 1.4 .85 8 .10 1.9 49 2.8 8.0 3.1 11 .85 9 .10 .40 27 2.8 .83 .10 .30 20 2.7 7.2 3.2 9.1 7.8 3.8 2.6 1.2 .84 11 .10 .30 15 2.7 6.9 4.1 37 7.5 3.8 2.4 1.1 .81 12 .10 .30 13 2.7 6.6 36 16 7.2 3.8 2.4 1.2 .82 13 .10 .30 11 2.7 6.1 61 13 6.7 3.7 2.4 l.l .85 .10 12 6.2 3.7 2.5 1.2 .83 IS .10 .30 8.4 2.6 5.8 19 12 6.1 3.6 2.4 1.1 ..83 16 .10 .30 7.6 2.6 5.6 15 11 5.8 3.6 2.4 1.1 .83 17 .10 .30 7.0 2.6 5.2 13 9.9 5.8 3.7 2.4 1.0 .83 18 .10 .40 6.4 2.5 5.1 11 35 5.7 3.7 2.4 .99 .88 19 .10 .40 6.1 2.5 5.0 9.6 35 5.8 3.5 2.3 1.0 .86 20 .10 .50 5.7 2.5 4.8 8.7 24 5.5 3.4 2.2 .98 .85 21 .10 .40 5.3 2.5 4.4 B.I 52 5.2 3.3 2.1 1.1 .86 22 .10 .40 5.0 86 4.3 7.5 62 5.3 3.2 2.1 1.1 .86 23 .10 .40 4.6 17 4.2 7.2 41 5.1 3.3 1.9 1.1 .67 24 .10 .50 4.2 429 4.1 6.8 33 5.1 3.3 1.9 1.0 .90 25 26 5.1 3.3 1.9 .95 .88 26 .20 .50 4.0 45 4.0 6.3 22 5.0 3.3 1.8 .97 .88 27 .20 .50 3.9 29 3.8' 6.0 19 5.0 3.1 1.8 .95 .86 28 .20 .SO 3.7 22 3.7 5.9 17 4.8 3.0 1.7 .97 .95 29 .20 .50 3.5 18 5.7 15 4.8 2.9 1.6 .94 .99 30 .20 .60 3.5 17 5.5 14 4.6 2.9 1.6 .95 .94 31 TOTAL 26.08 MEAN .13 .75 10.3 20.3 6.97 3.58 2.32 1.15 .87 MAX .20 MIN .10 .20 .60 2.5 3.7 3.1 6.6 4.6 2.9 1.4 .92 .81 143, 70 52

DISCHA RGE, IN CU DAY OCT NOV JUN JUL AUG SEP 1 .94 .56 2.4 1.5 1.7 1.4 2.7 .95 .53 .30 .20 .20 .94 .56 2.2 1.6 1.6 1.4 3.1 .96 .46 .28 .20 .19 .89 .56 2.0 l.S 1.6 1.4 1.9 . 8 .46 .27 .20 .21 .89 .60 1.8 1.5 1.5 1.3 1.6 . 1 .48 .27 .20 .22 .86 .60 1.8 1.5 l.S 1.3 1.5 . 4 .46 .26 .20 .21 .85 .65 1.7 1.5 1.5 1.3 1.4 . 2 .46 .27 .20 .19 .85 .66 1.7 1.5 1.4 23 1.4 . 2 .47 .28 .20 .18 8 .84 .65 1.7 1.5 1.4 153 1.3 .93 .47 .28 .19 .17 9 .84 .~63 1.6 1.5 1.4 25 1.3 .92 .46 .27 .18 .15 10 .63 1.6 1.8 1.4 11 1.2 .85 .44 .25 .18 .15 .23' 11 .82 .64 1.6 "l.7 1.4 6.3 1.2 .85 .42 .20 .15 12 .80 .64 1.5 1.6 1.5 3.6 1.2 .84 .39 ,23 .22 .16 13 .78 .65 .63 .39 .23 .23 .16 14 .72 .65 1.6 1.4 .7 2.9 1.1 .83 .39 .24 .24 .18 15 .68 .65 1.6 1.4 .6 2.6 1.2 .77 .39 .25 .24 .20 16 .64 .66 1.6 1.4 .6 2.4 1.1 .76 .39 .25 .26 .20 17 .64 .66 1.6 1.4 .5 2.2 1.1 .74 .39 .22 .26 .18 18 . .64 . 0 2.2 1.4 .8 2.0 1.1 .73 .38 .20 .24 .16 19 .64 2.5 1.4 .3 1.9 1.1 .73 .38 .20 .23 .18 20 .64 2.2 1.4 .0 1.8 1.1 .68 .37 ,.20 .22 .19 21 .64 1 2.0 1.4 .8 1.7 1.1 .69 .33 .19 .21 .17 22 .64 1.9 1.3 .7 1.6 1.1 .66 .33 .19 .23 .15 23 .60 1.9 1.3 .6 1.6 l.l .65 .33 .17 .21 .14 24 .60 1.8 1.3 .6 1.5 1.1 .64 .35 .17 .20 .14 25 .60 1.7 1.3 .5 1.5 1.1 .62 .35 - .17 .20 .14 26 .60 1.6 1.3 .5 1.4 1.0 .55 .35 .18 .20 .13 27 . 0 1.6 1.6 .4 1.4 1.0 .55 .34 .18 .20 .13 28 . 0 1.6 1.9 .4 1.4 .99 .56 .35 .17 .20 .15 29 . 6 1.6 1.5 .4 1.4 .97 .57 .32 .17 .20 .16 30 . 6 1.6 1.5 - 1.4 .95 .56 .30 .17 .20 .17 31 . 6 1.5 1.7 - 1.4 .55 .IB 1 .21 TOTAL 6.55 5.11 MEAN .17 MAX .94 16 2.5 1.9 3.5 153 3.1 .98 .53 .30 .26 .22 MIN .56 .56 1.5 1.3 1.4 1.3 .95 .55 .30 .17 .18 .13 14 13 10

WTR YR 1968 TOTHL 581 .61 MEAN 1.59 MAX 153 MIN .13 »C-FT 1,150 VENTURA RIVER BASIN

11117600 COYOTE CREEK NEAR OAK VIEW, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

1 .15 .2 r .38 8 36 85 14 6.2 3. 2. .9 . 2 15 .2 r .36 .9 3 .15 .2 ) .36 B 31 66 14 6.0 3. 2. .9 4 .17 .2 9 .36 6 28 57 14 6.0 3. 2. .9 5 .16 .2 9 .36 B 26 . 51 25 6.0 3. 2. .9 6 .16 .2 r .36 8 45C 45 20 5.8 3. 2. .B 7 .17 .2 i .36 5 150 40 14 5.8 3. 2. .8 8 .16 .2 > .36 5 60 36 13 5.8 3. 2. .8 9 .18 .2 > .36 5 45 33 12 5.8 3. 2. .8 1C .19 .2 > .37 5 38 30 11 5.8 3. 2. .B . 11 .19 .2 > .38 . 5 33 27 11 5.8 3. 2. .7 12 .19 .2 r .35 5 28 25 11 5.8 3. 2. .7 13 .19 .2 i .36 7 24 24 10 5.B 3. 2. .7 . 14 .33 .2 ) .36 . 5 22 23 10 5.7 3. 2- .7 .7 16 .18 .3 ) .43 17 .17 .3 ) .39 6 26 21 9.4 5.2 3. 2. .6 18 .17 .3 > .36 I. 23 20 9.3 5.1 3. 2. .6 . 19 .18 .3 .38 524 21 20 9.0 4.9 3. 2. .6 . 20 .19 .3 .37 1,320 2C 19 8.7 4.7 3. 2. .6 . 21 .19 .3 .39 788 20 IB 8.4 4.6 3. 2. .5 22 .20 .3 .41 197 30 IB 8.1 4.5 3. 2. .5 23 .22 .3 .42 81 200 17 7.8 4.4 3. 2. .5 24 .22 .3 .42 350 1,800 17 7.6 4.4 3. 2. .5 25 .22 .3 .64 2,500 2. .5 26 .23 .3 .48 270 193 16 7.2 4.3 2. 2. .4 27 .24 .3 .45 360 125 16 7.0 4.2 2. 2. .4 28 .24 .3 .48 150 100 15 6.8 4.2 2. 2. .4 . 29 .25 .3 .45 90 15 6.6 4.1' 2. 2. .4 3C .26 .3 r .48 55 15 6.4 4.1 2. 2. .4 31 .27 ----- .48 41 2. .4 - .9 3 . MEAN .20 .3 L .41 2 L7 211 29.6 10.7 5.17 3.3 2.1 1 64 13 MAX .33 .4 V .64 2,5 )0 2,200 85 25 6.2 3. 2. .9 .4 . AC-FT 12 I J 13 ; 01 7

1.1 .88 153 .9 .3 .9 2 .50 .37 .24 1.0 .88 48 .9 .2 .9 .49 .34 .25 1.0 .88 14 .8 .3 .8 .52 .34 .24 1.0 .88 45 .7 .2 .8 .52 .34 .22 1.1 .88 31 .7 .2 .8 .50 .34 .23 2.4 .88 1Z .7 .2 .B .50 .34 .22 1.9 .88 9.7 .7 .2 .7 .49 .31 .22 1.5 .88 8.2 .6 .3 .8 .49 .31 .23 1.3 1. 7.3 .6 .2 .8 .48 .30 .23 1.3 2. 6.5 .6 .2 .7 .48 S30 .22 1.2 ) 1. 5.8 .6 .2 .47 .30 .22 .47 .28 .23 1.2 1. 4.9 .5 .1 .46 .28 .24 1.2 1. 4.5 .5 .1 .46 .28 .24 1.2 > 1. 3.9 .5 .1 . .45 .27 .24 1.2 .94 2. 3.7 .5 .1 .45 .26 .23 1.2 .94 2. 3.5 .5 .1 . 5 .26 .23 1.1 .94 1. 3.3 .5 . 4 .26 .22 1.1 .94 1. 3.1 .4 .1 . . 4 .26 .23 1.1 .94 1. 2.9 .4 .1 . 4 .25 .23 1.1 .94 1. 2.7 .4 .1 . 3 .25 .24 1.1 .94 1. 2.6 .4 1 . . 3 .23 .22 1.1 .94 1. 2.5 .4 .1 . 3 .23 .21 1.1 .94 1. 2.3 .4 .1 . 2 .23 .21 1.1 .94 1. 2.2 .3 .1 .59 .42 .23 .21 1.1 .94 1. 2.2 .3 .1 .59 .41 .24 .20 1.1 .94 1. 2.1 .3 .1 .55 .41 .24 .20 1.0 .94 1. 9 2.0 .3 .1 .55 .40 .25 .20 1.0 .94 1. 2.0 .3 .1 .55 .39 .25 .21 1.0 .94 1. 2.0 .3 .97 .54 .38 .24 .21 31 .94 1. 2.0 .96 .38 .24 - TOTAL MEAN 1 1.20 1.00 1.32 4.66 12.9 1 52 1.14 .72 .45 .26 .22 MAX HIN 1.0 .94 .88 1.1 2.0 .3 .96 .54 .38 .23 .20 AC-FT 68 71 61 Bl 259 T94 90 70 43 28 17 13 CAL YR 1969 TOTAL 14,406.82 MEAN 39.5 MAX 2,500 MIN .45 AC-FT 28,580 VENTURA RIVER BASIN

11117800 SANTA ANA CREEK NEAR OAK VIEW, CALIF. LOCATION.--Lat 34°2S'2S", long 119°20'2S", in Sant na Grant, Ventura County, on upstream end of right abutment of bridge, 400 ft upstream from unnamed tributa and 3.0 miles northwest of Oak View. Prior to Aug. 17, 1970 1970, on downstream end of right abutment. DRAINAGE AREA.--9.il sq mi. PERIOD OF RECORD.--October 19S8 to September 1970. GAGE.--Water-stage recorder. Datum of gage is 612.43 ft (revised) above mean level (Bureau of Reclamation bench mark). Prior to Aug. 17, 1970, on downstream end of right abutment. AVERAGE DISCHARGE.--12 years, S.67 cfs (4,110 acre-ft per year); median of yearly mean discharges, 1.4 cfs acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (150 cfs), water years 1966-70 e Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. . 16, 196S 2330 1,030 S.70 Jan. 24, 1967 1330 1,600 6.40 Feb. 6, 1969 0300 1,100 9.10 . 24, 196S 0300 *2,670 8.12 Mar. 12, 1967 2200 195 3.18 Feb. IS, 1969 1400 29S 7.35 . 29, 196S 0700 1,480 6.35 Feb. 24, 1969 2400 3,410 9.55 Mar. 8, 1968 0430 192 3.17 . 3, 1966 0030 379 4.00 Mar. 1, 1970 044S *370 7.12 6, 1966 1430 *2,6SO 8.10 Jan. 19, 1969 1900 2,890 8.40 Mar. 4, 1970 191S 242 6.69 n. 22, 1967 0830 S40 4.30 Jan. 2S, 1969 0800 *4,7.30 10.70 No flow for long periods in e ch yea Period of record: Maximum harge, 4,730 cfs-Jan. 25, 1969 (gage height, 10.70 ft); no flow at times in each year. Flood of Mar. 2, 1938, 3,7 REMARKS.--Records good, gage-height record July 30 to Sept, 21, 1969. No regulation or diversion above station. COOPERATION.--Twenty-two discharge measurements furnished by Ventura River Municipal Wate District and one fur- nished by Ventura County Flood Control District.

DISCHARGEr IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

NOV DEC JAN FEB MAR APR MAY JUN JUL

0 9.6 48 .8 3. . .60 .10 .10 0 8.7 36 .5 3. .40 .10 .10 0 7.1 27 .2 3. .40 .10 0 0 6.4 21 .6 2. .50 .10 0 c 6.1 18 .9 2. .50 .10 0 0 5.5 15 .6 2. t .40 .20 0 0 5.2 14 .7 2. . 0 4.9 12 .8 2. . .30 .20 0 4.9 10 .2 2. . .20 .30 0 4.9 9.6 .9 2. .20 .20 0 4.9 B.7 .6 2. ^ 0 5.5 7.9 .3 2. . 0 4.6 7.1 .3 2. . .40 .20 0 4.3 6.7 .3 2. .40 .20 0 4.0 6.7 .3 2. .50 .20 161 4.0 6.4 .0 2. f .40 .20 176 3.B 6.1 .0 2. .20 .20 118 3.8 6.1 .8 2. .10 .20 35 3.B 5.8 .5 2. .10 .10 15 3.5 5.5 .5 2. .10 .10 12 3.3 5.2 .5 2. 1. .10 .10 223 3.3 4.9 .3 2. .10 .10 1BO 3.1 4.9 .3 2. . .10 .10 534 3.1 4.6 .3 2. .4 .10 .10 10C 3.1 4.6 .3 2. .4 .10 .10 57 3.1 4.6 .3 2. .5 .30 .10 33 3.1 4.3 .1 2. .6 .60 .10 22 3.1 4.3 .1 2. .6 .50 .10 16 729 4.0 2. .6 .50 .10 13 171 20 2. .7 .20 .10 31 73 7.1 1. .10

TOTAL 9. BO 4.40 MEAN 56.5 35.6 11.2 4.46 2.4 1.2 .32 .15 MAX 534 729 48 9.6 3. 1. .60 .30 MIN 0 3.1 4.0 3.1 1.8 .4 .10 .10 AC-FT 19 8.7 VENTURA RIVER BASIN

11117800 SANTA ANA CREEK NEAR OAK VIEW, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND! WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 JUL AUG SEP 1 o .20 2.9 17 3.5 11 14 .6 .6 .20 .10 2 0 24 2.9 14 3.5 12 14 .6 .4 .30 .10 3 0 90 2.9 11 3.3 9.6 14 .3 .4 .30 .10 4 c 16 2.7 12 3.3 19 13 .3 .4 .20 .10 5 0 139 2.5 19 3.1 16 12 .0 .4 .20 .20

6 £ 867 2.5 9. 6 3.1 12 12 .0 .4 .30 .10 7 14 153 2.5 9. 1 2.9 16 11 .0 .2 .40 .10 e 2.C 47 2.3 B. 7 2.9 14 10 .0 .0 .40 .10 9 .10 26 2.3 B. 7 2.9 12 10 .0 .0 .40 .10 10 0 18 2.3 3. 3 2.9 13 10 .0 .90 .30 .10 u 0 14 2.1 7. 9 4.3 31 9.6 .0 .90 .20 .10 12 0 13 2.1 7. 5 53 16 9.1 .0 .90 .10 .10 13 0 12 2.0 7. 1 66 14 B.7 .0 .80 .10 .10 14 t 9.6 2.0 6. 4 36 13 8.3 .8 .60 .10 .10 15 0 7.5 2.0 6. 1 19 12 7.9 .1 .70 .10 .10

16 0 6.7 2.0 5. 6 14 11 7.5 .3 .70 .10 .10 17 0 6.1 2.0 5. 6 12 10 7.1 .1 .60 .1C .10 IB 0 5.2 2.0 5. 5 1C 33 7.1 .3 .60 .10 .10 19 0 4.9 2.0 5. 2 9.6 32 7.1 .5 .50 .10 .10 20 0 4.9 2.0 4. 9 14 26 6.7 .0 .50 .10 .10

21 0 4.6 2.0 4. 9 16 55 6.4 .7 .50 .10 .10 22 0 4.0 156 4. 6 12 62 6.1 .7 .40 .10 .10 23 0 3.6 22 4. 6 8.7 44 5.8 .9 .40 .10 .10 24 0 3.5 436 4. 3 7.9 36 5.5 .7 .40 .10 .10 25 0 3.5 109 '4. 9 7.9 29 5.2 .7 .30 .10 .10 26 0 3.5 45 4. 0 7.5 25 5.2 .3 .30 .10 0 27 0 3.5 30 3. 6 7.5 22 5.2 .0 .30 .10 0 26 .10 3.3 23 3. 8 7.0 20 5.2 .6 .30 .10 .10 29 .10 3.3 19 6.7 16 5.2 .6 .20 .10 .10 3C .10 3.3 19 6.7 16 5.2 .6 .20 .10 .10 31 3.1 18 11 .20 .10 TOTAL MEAN 0 .55 48. 5 29.9 7.41 11.9 22.0 8.35 20 .75 .17 .097 MAX 0 14 867 436 1 7 66 62 14 .6 1.6 .40 .20 WIN 0 0 .23 2.0 3. 6 2.9 9.6 4.9 .6 .20 .10 0 AC-FT 0 1C 5.6

DISCHARGE. IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY JUL AUG SEP

1 .10 .1C 1.8 .70 .60 .80 2.1 .30 .10 2 .10 .10 1.4 .60 SO .80 2.3 .30 .10 3 .10 .10 1.1 1.1 kO .70 1.4 .30 .20 4 .10 .10 1.0 1.0 »0 .60 l.l .30 .20 5 .20 .20 .90 1.1 .40 .60 1.1 .30 .20 6 .20 .20 .90 1.1 .40 .60 1.1 .30 .20 7 .20 .20 .90 1.1 kO 9.6 1.0 .30 .20 e .20 .30 .90 1.1 kO 63 .90 .30 .20 9 .20 .30 .90 1.1 kO 7.1 .60 .30 .20 10 .20 .20 .90 1.4 .40 4.3 .70 .30 .20 11 .20 .20 .80 1.5 .40 3.3 .70 .30 .20 12 .20 .20 .80 1.4 tO 2.9 .70 .30 .10 13 .10 .20 .BO 1.2 ro 3.5 .70 .30 .10 14 .10 .20 .80 1.1 bO 2.9 .70 .30 .10 15 .10 .20 .60 1.0 )0 2.7 .60 .30 .10 16 .10 .20 .80 1.0 .BO 2.5 .50 .30 .10 17 .10 .30 .80 1.3 1. 2.3 .40 .30 .10 le .10 .40 2.0 .0 1. 2.0 .40 .30 .10 19 .10 .6 2.0 . 0 1. 2.0 .40 .20 .10 20 .10 .5 1.4 . 0 1. 1.8 .40 .20 .10

21 .10 .6 1.2 . 0 1. 1.6 .40 .20 .10 22 .10 .0 l.l .0 1. 1.5 .40 .20 .10 23 .10 .1 1.1 . 0 1. 1.4 .40 .20 .10 24 .10 .0 1.0 .60 1. 1.4 .30 .20 .10 25 .10 .0 .90 .60 1. 1.2 .30 .10 0 26 .10 .1 .80 .60 1. 1.2 .30 .10 0 27 .20 .6 .80 1.1 1. 1.1 .30 .10 0 26 .20 .6 .90 1.2 1. 1.1 .30 .10 0 29 .20 .6 .90 1.0 0 1.0 .30 .10 0 30 .20 .3 .70 .60 1.0 .30 .20 0 31 .10 _- .70 .70 1.0

0 0 0 HE AN .14 .93 1.03 .94 94 4.11 .71 .24 .11 0 0 0 HAX .20 6.6 2.0 1.5 1 8 63 2.3 .30 .20 0 0 0 WIN .10 .10 .70 .60 iO .60 .30 .10 0 0 0 0 AC-FT 6.5 55 63 58 48 253 42 15 6.6 0 0 0 CAL YR 1967 TOTAL 2.612 .50 MEAN 7.16 HAX 436 M1N 0 AC-FT 5,180 WTR YR 1948 TOTAL VENTURA RIVLR BASIN

11117800 SANTA ANA CREEK Nt\R OAK VIEW, CALIF.--CONTINUED

SEPTEPE

1 13 71 1? 3.9 2.1 1.4 0 28 61 1C 3.8 2.0 1.4 .60 3 ! 74 53 12 3.8 1.8 1.4 .Br 21 4H 10 3.8 1.6 1.2 .7; Ij] 43 23 3.8 1.6 1.2 .fcc .

113 39 14 3.fi 1.5 1.2 1C3 33 li 3.« 1.4 1.2 H ', 73 3u 9.1 4.C 1.4 1.2 9 t 52 27 8.3 4. 1.2 1.2 .4: . l f ? ; 37 25 7.9 4. 1.2 1.2 .40 H : . 31 ?3 7.5 4. 1.4 1.2 12 27 21 7.5 4. 1.4 1.2 .30

14 'v 1 24 19 7.1 1.4 1.0 .3C 15 I . J 71 IB 6.7 .? 1.4 l.C .30

16 ( I-, 33 16 6.7 .8 1.4 .90 17 i) 27 16 6.4 .8 1.4 .90 !3'J 18 I. 27 16 6.4 .8 1.5 .90 .3.

2* - 4** 24 14 6.4 .8 1.5 .90

.30 21 : Bin 21 14 (-.1 .8 1.5 .90 .3' 1" 12 6.1 .3 1.5 .90 2 1 v 73 287 12 6.1 .7 1.5 .90 .3'. 1.29C 12 5.2 .7 1.5 .90 .3.. 25 I 1,9"L 1,573 11 4.9 .7 1.5 .90

26 : 218 IBC 10 4.6 2.7 .5 .90 .3C 27 .3- 258 87 lo 4.3 2.5 .4 .90 .30 2* .4' 1J7 1C lu 4.3 2.5 .4 .9C .3 29 . I- 67 10 4.0 2.5 .4 .90 .4 ,

VEA.N C 3 .036 1 i>4 166 23.5 7.75 3. S3 1.49 1.35 .41 PA* : C .4-'. 1,9 <. 1,57. 71 23 4.3 2.1 1.4 .81. MIN 'J . ~ . 1 18 ID 4.0 2.3 1.2 .90 .3C AC-FT n j 2.2 10,0 bo 9,210 1,450 461 217 89 64 25

DISCHARGE, IN CUBIC F e f.T CEK SFCCND, WATER YEAR OCTOBER 1969 TO SEPTEH BtR 197'.'

1 .1C .4: .6C T rj 1.5 154 1.1 .72 .24 .C5 ! .1"! .4f .6^ 6) 1.4 49 1.1 .72 .20 .C2 3 .1" .40 .t; 6J 1.4 11 l.l .70 .20 4 . U .40 .6 6J 1.4 43 l.l .68 .23 5 .1. .40 .6' 6; 1.2 33 l.l .66 .14 L

fc . If - 3.3 .6C 6^ 1.2 11 l.S .64 .11 J 7 .10 1.8 .6'J 60 1.1 11 .92 .62 .11 * . U 1.: .6'J 6C l.l 11 .92 .60 .11 ) . 1? . ae .60 2. 1 1.6 11 .92 .57 .11 3 K .If .7C .6'' 3. fl 4.fJ 11 .92 .54 .11 0

11 .1C .6'.- .6C 1. 3 3.8 1C .82 .51 .C8 0 12 .1C .6J .b'. I. 6 2.0 1C .82 .48 .C8 1J .1C .6'' . 6C I. 5 1.6 10 .82 .45 .08 0

15 .20 .ft' .6C 1. 8 1.5 7.7 .82 .39 .08 0

16 .20 .6S .6 1 4. 1.6 5.1 .82 .36 .08 0 0

19 .2f .6? .f! 1 1.1 3.6 .82 .30 .08 0 2C .40 .6C .6.^ 11 .80 3.1 .73 .28 .08 0

21 .40 .6^ .6'J n .65 2.7 .73 .26 .08 0 22 .40 .6,. .6" 8 .65 2.2 .73 .24 .08 0 23 .4i1 .6C .6C S .65 1.8 .73 .22 .C8 24 .5: .6C .6C 6 .65 1.6 .73 .2^ .08 0

76 .50 .60 .60 5 .65 1.2 .73 .18 .08 27 .52 .60 .63 5 .57 1.2 .76 .17 .C7 0

29 .4C .6C .60 . 5 1>2 . 7<, .i<, .07 30 .40 .60 .60 I. 5 1.2 .74 .14 .05 0

TOTAL 7.70 21.60 13.70 50. 70 93.17 429.8 25.67 12.42 3.07 .07 .1C .002 C

M1N .11 .4C .60 6J .57 1.1 .73 .14 .05 0 AC-FT 15 43 37 1 01 185 853 51 25 6.1 .1 o YLNTURA RIVER BASIN

11118000 COYOTE CREEK NEAR VCNTURA, CALIF. LOCATION.--Lat 34°21'26", long 119"118'46", near southeast corner of Santa \na drain, \< bank 200 ft downstream from count

DRAINAGE AREA.--41.2 sq mi.

PERIOD OF RECORD.--October 1927 to September 1932, October 1933 to September 1958, October 19b9 to September 1970.

AVERAGE DISCHARGE.--30 years (1927-32, 1933-58), 13.2 charges, 5.1 cfs (3,700 acre-ft per year).

RLMARKS. --Records fa gage-height rec 6, 1969. Tic cgulated by Casitas Reserv ir (cap ty, 267,000

DISCHA

PAY OC r " n" JUN JUL AUC, SFP

I .14 .13 .2., . 16 9.3 .45 .36 .11 .09 .L4 .^3 2 .14 .18 .21 .16 7.1 .44 .35 . 1 . )4 .-3 3 .IS 3.3 .29 .'c .10 .C4 .14 4 .U .18 .23 .16 12 .41 .17 .09 .04 .C5 .18 .18

6 .48 .IS .23 .16 2.9 .42 .14 . 0 ,'j8 ."34 .Cb 7 . fC .13 .27 .16 2.4 .43 .14 .c .08 .0' .C2 ? .66 .18 .27 .16 2.2 .43 .15 c .08 ,:>3 .( 2

K .b3 .16 .30 .?<; 2.6 .18 .C5

11 .48 .18 .25 . : > 3.C .39 .u4 c .09 .C3 .C6 12 .41 .18 .2J .i.S ?.7 .39 .j5 .c .09 .23 ,T6 13 .3U .18 .21 .1)5 2.4- .37 .06 . c .48 .C3 .1.7 14 .35 .18 .21 .35 .33 2.1 .37 .06 . c .'Ji.52 .C6 15 .33 .13 .?l .C5 I. 1* .39 .16 .c .03 .C6

16 .31 .16 .?9 . "; .'1 .',6 .1 6 .-'7 1.8 .c .35 .03 17 .27 .16 , r 5 1.6 .41 .:B .06 .C3 IS .25 .16 . 1 . 35 1.5 .<> ' .10 >c .07 .03 . '5 19 .23 .16 .13 .06 1.5 .39 .11 . c .09 .03 .4-. 2-, .21 .16 .23 .07 .95 .17 . 0 .12 .Ct- .i 5

21 .20 .16 .23 .-^7 .78 .39 .20 ,'s .11 .03 .1.4 22 .16 .21 .C8 .72 .40 .23 .f 7 .':3 .C3 23 .2- .16 .2: 0 24 .?>. .16 .2: . 1C .57 .39 .21 .c .06 .1.3 Ci 25 .23 .16 .20 . 10 .55 .39 .2,1 . c . J7 .03 0

26 .?: .16 .23 .15 .57 .38 .21 .0 .21 .C3 'j 27 . 2 j .16 .16 .b6 .51 .45 .19 .0 .07 .03 r^ .2^ ?6 .16 .16 b.B .52 .37 .21 .0 .ue .C3 ^ 29 .22 .16 .16 .53 .34 .22 .c .C6 .02 <; 3. .20 .16 .16 ______.53 .37 .17 .c .05 .02 > 31 .16 .16 .47 r .12 .02

TOTAL 4. 8.93 5.26 6.37 9.13 74.86 12. Cl 5.07 2.74 3.26 .97 1.C3

CAX .70 .18 .34 5.8 12 .45 .36 .11 .52 .04 .07 WIN .14 .16 .11 .C*i &C-FT K. 18 i: 13 18 148 24 1C 5.4 6.5 1.9 2.0

WTR YR 197C TOTAL 133.94 MEAN .37 VENTURA RIVER BASIN

DRAINAGE AREA.--188 sq mi. PERIOD OF RECORD.--September 1911 to January 1914, October 1920 to September 1070; combined diversion October 1932 to September 1970.

IVSP 1928 for lustc

AVERAGE DISCH.A

peak discharges ab<

IVtr yr 1966 1965 17, 1965 1965 24, 1965 1965 29, 1965 1966 1!)66 1366 1967 1967 1967 1968 1969 1969 1969 1969 1970 1970

daily di River only IVtr yr Date Date 1966 Oct. 1 to Nov. 15, 1965 Nov. 11, 1965 1967 (a) Xov. 11, 1966 1968 Aug. 12 to Sept. 20, 1968 Sept. 9, 1968 196 Oct. 5, 1968 1970 Sept.16-30, 1970 Vug. 31, 1970

a Oct. 8 to Nov. 6, Nov. 9 to Dec. 1, 1366.

COOPERATION.--Four discharge measurements furnished by Ventura REVISIONS (1VATER YEARS). --WSP 1565: 1957. hSP 1928: Drainage 1 36 1 2 3,. 8 11 12 4.3 2. 6 3.1 .*; ? 2' td 27 5 13 12 2.2 3. i 2.? .50 3 : 17 52 24 6 14 8.6 2.1 4. 5 1.1 .4G 1 l.C .80 '> r 15 *« 24 4 15 5.4 3.7 2. } 1 .U 1.6

.. 15 36 «Z 16 14 8.2 3.5 2. I 1.2 1.4 / - IB 33 42 16 13 7.4 2.5 2. 1 3.3 .80

r< 15 ?* 3C 16 14 5.6 3.9 2. 9 1.6 1.3 1'. . 15 it '* 16 ! > 5.1 4.1 3. 1 .90 3.3

U 0 15 55 19 16 16 5.7 4.7 2. 6 .7C 1.? 7 ' 1R J4 19 16 14 5.7 5.1 I. 9 . 6 r. 1.1 l - 2? J? 19 16 1.1 6.-) 5.1 1. 1 1.4 .5 J

5 : 2ft 26 Id 15 6.R 3.7 5.6 1. 7 2.5 .3C

6 7' ?4 ?4 IP 14 11 3.7 2.2 2. 6 1.1 .?C 7 53" 2' ?; Ih 16 12 4.1 3.7 2. 9 .7.; '»C 1 424 1? IB 22 12 12 4.1 4.1 2. R .&: ,JC ' IIH 16 ?3 2: 8.6 11 5.4 6.4 2. 1 .4. .7C ") 3j If, ? 17 H.6 5.9 5.1 5.3 I. 7 .8C .3C

?' -(31 14 17 2 1C 7.9 9.J 3.1 I. 7 i. a .21. 2* 1,170 13 17 ' 9.6 Iv, 5.9 2.9 2. 6 1.8 -?C 24 4, .,61. 14 If, 2 10 1C 5.9 2.S 2. 9 .90 ,2'J .7'- 75 'j49 16 lh ? 9.6 7.6 6.2 2.B 2. 5 .If

21 li.5 14 15 IB 1C *.« 2,6 3.3 90 .60 .10 28 >? 14 15 ?r if 4.1 3.9 2.8 90 .6 1: .1C

''ESN r 278 ?34 33.7 2S.7 13. ) 10.5 6.C5 3.73 2. 23 1.31 .62 "«< - 4,r,6T i,l6" 12«, 92 1« 16 12 7.6 4 .5 3.3 3.3 Tl C i. 11 15 17 7.3 4.1 2.6 ?.l «C .10

1 . ; ; C 16 3 15 55 53 23 19 2.6 5.4 ' .0 ; 6.4 15 J 13 53 56 23 21 2.2 5.4 i . -, : 180 13 H 14 36 52 22 19 2.? .3 4 . , ) 13 12 a 12 56 5C 24 19 2.0 .6 => . " -. 538 14 6 13 65 39 24 13 2.6 .4

6 .1 .) 3,610 16 2 11 123 30 17 16 5.9 .8 7 . C «7 f-90 19 1 15 61 28 13 11 6. 1 .8 8 j 4.C 133 H 9 11 32 32 14 8 2 2.S .6 J r. '. 5» 17 9 14 ?5 34 14 6 5 3.4 8.6 1- 3C 22 9 19 35 36 20 7 .6 4.4 7.1

H c ; 25 2; 9 29 223 33 19 7 6 4.'; 7.1 i? : 17 16 9 ICO 60 29 16 7 .9 7.1 6.3 13 C 12 15 6 174 5. V* 14 4 .8 7.5 5.4 14 C 10 14 3 96 26 27 14 2 .6 7.5 5.6

16 : C 7.1 14 6 32 30 20 17 2 2 a. 6 4.6 17 r C 9.5 12 n 21 27 21 19 2 9.1 6.2 lo ; j 11 12 7 18 111 15 20 1 .7 8.2 8.2 19 -j j 21 12 2C 127 13 19 1 7 8.6 6.7 ?; C : 23 14 4 22 82 18 15 I 7 9.r 6.7

?1 "13 17 9.8 24 110 25 15 1 .9 9.0 7.1 2? 0 ,14 2f>C 6.9 18 185 23 12 I .9 8.6 6.3 23 J - 12 49 6.9 12 161 16 17 1 9 9.C 7.1 74 r v 1? 1,440 H.5 9.6 148 18 17 3 .0 6.7 6.7 25 1 .13 236 " ?1 119 15 17 4 .4 6.1 6.7

27 ," .. \4 & > 3 16 8C 78 20 6 .0 8.b 5.0 6.7 2:. ': 12 5? 2 1C 74 25 11 6 6 6.-'7.1 29 .; .; 11 45 - 12 63 25 1H 1 0 5.C 3.' : ? 11 44 - 12 5« 35 16 3 .4 7.<> 5.0

9.f n.6 MN - C 12 6.9 9.6 25 11 12 1 7 2.C 4.4

3,61'. MIN U AC-FT 16,870 11118500 VI-:NTUR\ RIVI R NI \R VENTURA, CA; iF.--coNTiMiirD

1 '..' , 6.7 11 1 3 fc.O 8.5 37 8.2 4.C i.Z 2 5.4 5.4 4.R .3 5.4 1C 42 10 3.2 2.2 S 5.6 ',..; 6.7 6.7 12 15 11 3.7 1.7 6.: -..4 6.7 .7 9,8 8.B 16 11 1.7 .5') 5 5.«~ 5.6 5.; 9.B 5.2 16 11 3.7 1.3

f 4.C 5.6 4.a . 6 7.5 5.2 17 7.9 3.9 .40 r 4. << 5.6 5.6 .9 99 17 8.2 3.C .20 ; 4.4 4.2 6.1 1 5.6 2P7 14 7.9 1.7 .2C ' 5." 4.' 7.5 4 P. 7.1 9.0 5.C .2P 1 5.'. '). o.4 6.7 34 9.8 9.8 11 .10 . C

11 5.6 1. 7.1 .4 6.2 24 11 10 3.C .10 12 4.4 8.6 7.1 .8 11 21 11 11 1.6 .10 11 4. a 6.3 6.7 11 3: 6.1. 9.8 1.3 .40 0 14 5.4 4.8 6.1 1 7.6 23 8.2 7.5 .90 .40 15 5.t 4.4 7.1 .7 5.C ?C 6.." 8.2 . 6C

16 5.6 4.2 9. D .7 7.1 16 17 5.4 4.2 U 19 17 5.0 2.2 1.2 If 4.8 6.5 25 15 17 11 7.1 2.8 5 1" 4.2 41 11 .6 1. 17 2 1.7 31 6... .1 6.0 17 9.3 8.2 1.1 .30

.M 6.3 1..1 6.1 .0 6.0 17 1C 7.9 .70 .30 22 7.5 17 5.6 .2 3.9 16 9.B 6.5 1.C .50 21 7.5 6.7 6.3 6.6 15 6.3 3.2 5.6 .60 74 6.3 7.1 fl.fc rt.5 16 4.4 1.4 2.2 .50 c <"j 4.8 6.3 9." .1 11 18 4.8 4.4 .2: .40

Zfc S.C 7.5 6.7 .1 0.1 16 a. 2 9.0 .20 .10 77 5.6 7.9 5.6 1 6.3 14 9.4 9.4 .20 .20 21 7,1 6.3 6.7 1 5.2 13 9.4 2.6 .20 .20 8.6 1.3 .30 .2C 3' 6.C <3 6.1 15 7.1 7.6 l.l .20

16.90 1.2t 0 2.51 .039 0 11 11 2.2 .?C 0 MiJ 1.7 4.1 4.B 4.4 5.0 5.2 4.4 1.3 .20 .10 J 0 2.4 0

-AU VR 1967 TPML ! 29, 4- Hf ,N .5 5 MIN 1.7 AC-FT It ,440

HAY JUN JUL AUG SEP

1 0 1,300 105 49 28 11 11 3.0 0 500 1.1CO 105 49 28 14 12 1.5 1 450 900 102 49 28 12 1.2 4CC 650 100 49 29 14 9.d 1.2 6CC 530 98 48 27 20 6.7 1.2

U 5..1 1.5 7 1.7CO 41C 94 46 27 18 14 1.9 1,10: 390 91 44 27 11 16 1.5 9 3 60C 380 9C 42 27 7.4 13 1.8 r: 350 170 88 41 27 16 17 2.0

11 200 360 66 39 27 27 16 2.2 12 3 150 330 85 38 27 28 8.2 2.2 13 C 110 270 84 37 26 27 7.S 2.4 14 128 220 82 36 26 27 9.0 2.6 15 127 195 80 35 25 27 5.4 2.8

16 7.9 3.1 17 C 7.5 3.1 Id C 122 140 72 34 21 23 6.0 3.1 19 1,593 119 130 70 33 19 23 6.3 3.2 2 893 117 120 68 33 17 2* 4.4 3.5

21 6,800 115 110 66 32 17 17 3.4 3.0 22 1.5C/0 113 105 65 32 13 13 4.4 2.5 23 5-X- 2,OCC 100 63 31 15 13 5.C 2.6 24 2,000 14.0CC 98 61 31 18 14 4.4 2.5 25 2i^,003 17, COO 96 58 3D 18 13 6.3 2.6

26 13.00C 5.0CC 94 55 30 19 14 6.C 2.6 27 5,0:0 17 14 4.8 2.3 2H 2,809 1,500 92 51 29 15 14 4.8 3.0 29 2,000 95 50 29 13 13 4.8 3.C 3. 1,303 98 50 29 11 12 4.3 3.1 31 903 11 4.0

28 28 17 3.5 IN 0 C C 0 113 92 50 29 11 7.4 3.4 1.2

4,060 VENTURA RIVER BASIN

11118500 VENTURA RIVER NEAR VENTURA, CALIF.--CONTINUED

JUN JUL 4UG SLP

1 3.1 h . - 1. ) 9. a 681 17 17 3.9 .63 .03 .1. 3 > 3.1 5 . ; 1.9 9.7 314 16 14 3.S . j .24 .: 3 1 3.2 4.2 1 7.2 9.9 40 14 13 4.7 . j .2v . 3 4 2.9 .S3 1 2.4 9.9 399 le 6.8 5.5 .; .14 ..3 ? 2.7 1.3 2 2.6 1- 173 19 2.5 6.p .: .42 . 3 .-, 6 3.4 47 2 3.J 13 39 19 2.7 7.8 .2 .78 7 3.7 28 ' 2.9 18 26 19 5.7 8.9 .1 .86 . '3 1 4.2 7.7 3 2.5 17 21 15 5.9 9.5 ..j .9j . 3 <> 4.5 f.2 3 12 24 21 7.6 6.2 9.7 .5 .91 ..3 1 4.4 6.7 3 72 36 24 2.3 S.3 a. 7 . i .82 ..3 11 3.9 5.3 3 23 25 21 5.3 7.5 7.4 .5 .H7 . . 3 1? '..6 2.9 2 15 14 20 6.5 1.1 . 3 1J 1.1 .1 .'3 13 5.5 1.3 2 7.4 13 19 6.4 7.7 ? . 5 1.2 14 6.8 3.1 1 8.3 ".4 21 1.5 7.5 9.8 .9 1.2 .-1. 3 15 7.7 4.4 1 8.6 7.4 18 1.6 7.8 13 .7 5.8

16 R.6 5.2 4 77 1 16 1- P.I 8.6 .2 6.3 ..2 17 4.6 4.1 i" 16 11 17 16 9.2 3.7 .5 6.4 .. ? IS l.l 3.1 6 14 11 18 13 8.2 5.9 .5 6.3 19 1.9 1.5 2 15 11 19 11 7.7 7.5 .2 5.3 .' 2 2: 2.1 2.H 6 14 11 2C 12 9.2 4.J 2.5 ?.4 .. 2 ,~i 21 '.5 4.7 3 14 1 21 12 9.2 7.7 2. 1.1 2' 3.1 6.J 1 11 1.7 21 11 8.7 7.C 1.8 .R4 .Ci 23 3.7 7.1 1 S.6 1) 22 11 e.4 3.8 1.6 .19 . 7 24 4.2 7.C 3 8.B 12 21 1 J 9.4 2.2 l.S .23 ..V 25 4.4 6.2 1 R.8 9.1 16 11 10 1.6 1.4 .B9 .'.i.

7.6 4.2 4.9 " 9.0 7.0 18 11 9.4 3. a 1.4 2.C .; , > ?7 4.4 6.9 9.3 6.3 16 13 8.9 6.9 1.4 .C3 ..i 2°. 4.4 a. 6 9.5 9.5 436 18 12 8.9 4.4 1.2 .C3 .:? 2T 4.6 9.9 9.1 9.5 21 19 11 2.C .74 .03 .:2 31 5.0 9.9 9.C 9.4 20 19 2C .36 .69 ."3 .19 .C3

47.57 .75 PEON 4.18 7.29 1.53 .075 19 26 13 7.1 6.4 .: j MI'1 1.1 .83 5.2 1.9 6.3 16 1.5 .36 .19 .02 1.5

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF VENTURA RIVER AND VENTURA CITY DIVERSION NEAR VENTURA, CALIF. , WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 JUN JUl AUG SFP 1 5.6 4.1 1 14 11 12 2 4.2 4.C 28 72 34 22 22 la 1 14 15 10 3 4.2 4.7 23 58 3' 22 23 17 1 14 12 8.) 4 4.2 3.1 f 51 29 22 23 15 1 15 11 6.3 5 4.2 3.9 19 46 28 22 23 15 1 14 11 6.0 6 4.2 3.9 19 -4C 95 22 22 16 1 14 9.0 I'j 7 4.7 3.8 24 19 46 22 22 16 1 4 9.5 12 H 5.6 3.6 24 36 38 24 21 16 1 2 13 7.8 9 6.0 3.7 22 33 36 24 2? 15 1 2 15 5.6 1 : 5.8 3.7 2' 32 32 23 21 15 1 2 14 8.8 11 5.6 2.C 23 58 29 23 22 16 1 3 13 7.2 12 3.3 2.6 22 38 29 21 2? 15 1 6 8. a 10 13 4.2 3.9 26 37 29 20 21 16 I 3 7.6 12 14 5.8 3.C 3? 35 29 21 19 16 1 1 9.1 1C 15 5.5 3.2 31 34 29 21 18 15 1 1 14 1C

16 3.9 74 31 31 29 21 20 15 1 11 14 6.2 17 3.2 585 30 27 29 20 70 15 1 12 13 5.6 18 5.1 430 19 28 30 23 21 15 1 14 13 7.0 19 5.3 121 18 3u 27 25 22 15 1 13 B.2 9.8 2U 5.1 34 2" ?8 26 23 19 15 1 14 8.1 11 21 5.0 26 Z>~ 28 31 19 20 15 1 14 9.? U 22 4.8 938 2' 21 29 17 19 15 1 9.9 9.8 10 23 4.7 1,130 20 28 30 18 8 14 1 11 13 10 24 4.6 4,36<~ 17 27 32 19 8 14 1 12 13 10 25 4.5 553 1R 21 3C 19 a 17 I 14 12 9.5 26 4.4 18C 1R 27 30 19 8 16 1 14 12 9.5 27 4.4 11". 18 26 25 19 9 15 1 14 11 9.8 28 4.3 56 2?. 26 26 19 7 14 1 14 8.3 9.7 29 4.2 34 5 tl7? 25 20 5 15 1 9.6 11 9.5 3(, 4.2 2B 1 ,270 128 21 17 15 1 9.4 13 8.1 31 4.1 347 43 21 17 9.5 12

18 18 16 15 12 "IN 3.2 2.C 17 25 25 17 15 14 13 9.4 7.6 5.6 440 VENTURA RIVER BASIN

11118500 VENTURA RIVER NEAR VENTURA, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF VENTURA RIVER AND VENTURA CITY DIVERSION NEAR VENTURA, CALIF., WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 6.4 .4 6.8 ?r 37 24 61 62 37 32 2 6.5 f .2 3 2J 33 26 58 6C 31 21 19 3 8.6 .0 1 7 22 31 25 3C 2r 18

5 9.6 .t> 5 4 24 55 21 IS

6 9.4 .6 3,6 24 18

I? 6." 1 R ?6 22 17 9 5.7 .2 2 26 24 21 36 46 34 28 21 18

11 8.1 9 29 22 17 12 8.T 13 9.: .s 1 25 '4 181 61 39 33 ?4 24 18 14 7.9 8 19 21 103 38 37 33 21 2>. 17

16 5.4 , 3 6 '3 19 42 37 44 33 29 18 16 17 6.C .2 6 21 19 3} 33 41 35 28 19 16

19 8.0 8 22 2C 25 135 42 34 25 21 17

21 8.8 .A 2 74 2C 27 116 39 31 25 ?1 1 7

23 P.7 1 56 22 25 16R 38 26 22 7 24 8.7 .4 9 1,45; 17 24 155 39 31 ?4 2- 8 25 9.7 6 6 242 ?.6 26 126 42 33 24 2'.' rt

26 7.5 6 94 102 2C 1

28 3.4 1 56 42 32 25 2C 9

3J 5.6 .7 20 8 31 7.9 "> 45 - 82 39 23 2,-

h

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF VENTURA RIVER AND VENTURA CITY DIVERSION NEAR VENTURA, CALIF

JIJL Aiir.

1 18 16 2 18 17 17 39 It 14 9.6 11 4 2 17 15 8 18 14 17 51 19 13 9.8 9.6 3 3 15 \ 16 15 8 17 2C 18 24 19 14 12 9.1 8 5 17 15 7 13 22 17 23 2C 13 9.0 9.C 6

6 16 14 7 17 2T 16 24 18 14 i; 4.7 a 7 14 15 7 17 17 1C8 23 18 13 i) 8.1 9 B 14 15 7 16 15 293 23 18 13 9.6 11 5 9 15 13 7 16 13 54 21 18 13 1C 11 1 ID 15 15 7 23 14 40 2C 18 17 1C 9.0 6 11 16 15 6 21 18 33 21 18 13 9.8 B.O 9 12 15 15 7 16 21 31 22 19 14 10 8.4 8 13 15 16 6 18 22 37 21 19 13 10 9.7 8 14 15 16 6 16 17 31 21 17 13 9.0 9.3 7 15 14 15 7 16 lj 28 21 17 1C 9.4 10 6 16 15 15 7 18 11 27 2J 17 1. 8.4 8. A 7 17 15 15 8 18 25 27 20 15 11 12 6.6 8 18 15 14 ? 18 26 26 21 16 11 12 5.6 7 19 17 44 8 18 ?\ 26 20 17 14 11 8.7 7 2C 14 38 2 18 14 25 18 17 14 9.9 10 7 21 14 i:s 0 18 16 25 21 16 9.3 9.0 10 7 22 14 29 1 17 17 24 2C, 16 7.6 8.0 9.8 7 23 15 21 7 17 13 24 19 14 12 12 9.6 6 24 16 19 8 17 16 23 17 14 12 11 9.4 6 25 14 17 9 17 22 23 17 14 11 1C 8.1 6 26 15 18 8 18 19 22 19 15 12 9.8 8.C 6 27 15 18 8 21 17 22 19 17 12 1C 9.2 6 28 15 17 8 18 16 22 19 14 8.1 8.6 4.7 6 29 15 17 7 17 17 22 19 12 8.1 9.0 4.8 6 30 15 38 7 18 ______22 18 13 8.5 9.9 8.7 6 31 14 8 2C 22 13 9.9 6.7

MEAN 10.1 8.54 6.6 MAX 18 20 17 14 11 9 MIN 14 13 6 16 1C 16 17 12 7.6 8.P 4.2 1 4C

HTR YR 1968 TrTAL 6,211.8 MEAN 17.0 AC-FT 12,320 VENTURA RIVER BASIN

11118500 VENTURA RIVER NEAR VENTURA, CALIF.--CONTINUED

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF VENTURA RIVER AND VENTURA CITY DIVERSION NEAR VENTURA, CALIF.,

I'AY MCT f.OV PEC JAi1. FFH MAR »PR MAY JtN JUL AUG Sff> 1 4.9 4.P 4.1 4.4 6J! 1,31'j 110 -57 32 18 21 16 T 4.9 4.7 ',.1 4.4 S3' 1,115 113 55 32 24 21 14 3 4.9

* ">.4 4.6 *.1 4. 3,5'.C 448 10'' 54 33 25 20 14 7 6.3 4.6 4.' 4. l,7r 417 98 51 33 28 27 14 i i.9 4.5 4.; 4.4 1,13: 395 94 48 33 25 25 14 * S.9 4.!> 4.. 4.4 6''3 385 91 46 3C 22 26 14 1 "".8 4.5 4." 4.4 3S? 377 92 45 32 28 26 14 IJ 5.7 4.4 4.1 4.4 702 369 91 43 33 37 26 14 12 5.6 4.4 4. 4.4 152 338 86 4? 35 37 24 14 13 5.5 4.4 4.C 4.1 U? 775 87 41 32 3(. 22 14 14 S.5 /,.! 4." 4.4 13; 224 $5 40 33 34 22 14 15 5.4 4.1 3.9 4.7 129 19S 82 39 31 35 19 15 16 5.4 4.3 4.0 4.7 127 174 79 39 3C 32 2C 15 17 5.3 4.3 4.0 /,.? 126 156 77 38 26 32 20 15 1" 5.3 4.3 4.^ 4.7 125 146 75 37 26 31 IS 15 19 5.1 4.3 4." 1.59C 123 133 76 36 26 31 18 15 ? -' 5.2 4.3 4.; P98 121 126 77 37 25 32 16 16

TO "FAN 5.IB 4.37 4.OR 1,813 1.9C1 317 62.1 41.3 28.5 27.3 19.9 14.4 *»« 6.3 4.8 4.4 20,0"' 17, '.'C 1,31? 113 57 35 37 27 16 WIM 3.4 4.1 3.7 4.1 116 99 56 33 20 18 15 13 At-FT ? 1 ^ 26C 251 115,HiO 1-5,6J"1 19,470 4,880 2,54j 1,700 1,&8C l,22f 859 C4L YR 1968 TOTAL 4,933.0 MFflN 13.5 MAX 293 M!N 1.7 AC-FT 9,78'

COMBINED DISCHARGE, IN CUBIC FEET PER SECOND, OF VENTURA RIVER AND VENTURA CITY DIVERSION NEAR VENTURA, CALIF., WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 CAY nCT NOV DEC JAN FtR MAR APR MAY JUN JUL AUG Stf>

13 23 24 25 16 11 10 7.2 11 9.3 7.1 7.2

9.6 8.3 8.4

9.7 7.9 9.7

9.8 6.7 8.1

9.6 9.3 9.C

12.4 7.7 1966-70 Date Date Time Tisch. C.ll. 111 Jan. 25, 1969 0900 *4,560 abl8.9 2,300 7.90 Mar. 12, 1967 2230 62 3.56 I'eb'. 6, 1969 - 500 975 6.35 Apr. 21, 1967 1630 46 3.40 1'eh. 24, l'J6 ll 3,600 a5.39

Mar. 8, 1968 0300 *120 4.00 Jan. 21, 1970 0200 *1,600 Mar. 1, 1970 0115 700 Jan. 19, 1969 1800 1,700 8.00 Mar. 4, 1970 1800 155

ior long periods In

(llAiLR V! \RS) . - WSP 1061: 1943. WSP 1928: Drainage area.

Dlil-HARG IN CU01C FFfct l>fR SCCONDi k»TER VE4R OCTOBER 1965 TO SEPTEMBER 1966

?.\ 1.6 1.1 8.4 fc.q 5.7

2.3\.-> 1.6 .1J

1.3 .15 1.1.? 1

1., 1. .<>C

.2C .21 .?: . ?o

.80 4.6 .2C .2: 0 3.6 CARPINTERIA CRFLK BASIN

11119500 CARPINir.RIA CRhl'K NEAR C'\RPINTFRTA, CALir.--CONTINin.il

UAY

1 .4', 5.2 20 7.6 5.8 i i ? 22 .4 ' 4.4 r 3.C 5.5 0 ^ 0 3 1CS .20 4.: ' l.S 5.C -. .57 : «, 3 3.5 .2'. 3.6 : 3.1 4.6 .40 .3C '' ; 54 .?- z.f. j 3.4 4.6 .3w .7C i'

6 3C2 .2J 2.5 0 2.4 4." _ ; .A 7 3.9 99 ,2J 2.4 J 4.7 3.7 no .4 S .3.. 38 .2: 2.^ J 3.4 3.C %, .2u : ) 21 .70 1.

11 S.6 .! , 1.5 I. a 11 3.4 1.2 .43 C 12 6.4 .1C 1.5 16 6.6 3.7 .40 .5,.1 C 13 4.8 .1 1.3 23 5.5 3.J v .10 > 14 1.1 3.4 .I;' 1.1 1? 5.- 2.B 0 ? 15 ^.6 2.0 .2. 1.3 7. 8 5.0 7.4 C

16 7.4 l.fr .7 1.2 6. c 4.8 2.2 0 .3J 7 17 1.3 1.4 t 1.- >. li! .6' 1.7 C . »C 4. 2 16 1.4 .6C C : I 9 v 1.1 .13 .BC 3. 4 17 1.2 .3C I. " ' .53 1.3 .73 .60 3. = 14 .6C i J

21 .2.: 1.4 : .5: ?. 6 23 1.3 C , i. 27 1.1 77 .53 2. 4 26 .5C 0 0 C ?3 J l.C 17 .41- 2. 19 .ic ; :. ; 24 1.0 362 .3. I. 6 15 : t '. v 25 .8' P5 I. ' I. 5 12 .10 .80 1 G

26 .ar 31 .4c i. 5 ij .1; .20 ; o 27 .sr 19 .3: i. 2 9.4 0 0 C C 2d j .7^ 14 .1' 1. 2 3.5 3 0 J '' 29 .6" 11 1. 7.5 C C C f 3. .f,r 9.7 1. ^ 6.6 0 j ; 0 31 1 0 0 r

OML .1 13. 11 1.7C4.6, 637.71, 45.2'. 1C1. CAN 0 .44 38.9 20.4 , 1.61 3. 29 6.53 2.13 .19 .12 .026 r AX 0 3.9 KC2 362 5.2 23 26 5.S 1.2 .60 .4. _ 'IN : r. 'i . i ' ^ i.s : ' r L C-FT i 26 2,39' 1,25} 90 7 C2 5C7 131 11 7.1 1.6 J

'AY

1 ' . }! (, .90 C 2 C 0 0 ,4C J 3 i, C -> v 0 .2: 4 c : j i v ') * '". 0 i C 0

6 ^ - J t 0 0 1 C 1 2 9 0 'J H : ) 3 1.6 38 U 3 J 3 0 3. ft - 5 .: 0 0 ir, : . 3.4 3 8 - - 11 i . ; 3. ; 60 0 .'' 12 ; 2.6 20 0 I 3 .1'. \. 0 .2 "> 9C 0 3 14 1 0 3C 0 J 15 j j : c 10 C 0

3.1C .10 .?C 14.6C 51.80 1.3C 0 '. .20 .10 .003 .OC7 .50 1«67 .043 C 0 .007 2.9 .10 .10 3.6 38 .9C 0 0 .20 C3030C300 6.7 .' .4 29 103 2.6 0 0 .4 1 4: 14 5.7 3.6 .3 .90 .&: 5.6 3.6 .6 .9: .6J 2,, 52 15 5.5 3.5 .4 .80 .6C 4 19 SO 13 5.4 !.5 .4 .8.' .6C 7C 46 3t 5.3 3.4 .4 ' .6" .6.

6 0 42 15 5.2 3.4 .4 . 8 . fc : r is: 38 12 5.1 3.3 .4 .8,. .f.C IT 35 11 5.0 3.3 .4 .80 ,6C 5" 32 10 5.0 3.? .4 ,BC .t>~: i: 35 30 9.C 4.7 3.2 .4 .8C . K J

T? 26 8.2 4.1 3.1 .3 .flC .50 i i 21 25 8.J 3.B 3.1 .3 .8,. .5- r, 24 7.6 3.7 3.1 .2 .8.: .v;

16 j Id 21 7.2 3.8 3.C

1C .20 18 19 6.6 3.9 3.0 .1 .8', .6.' 19 263 18 18 6.8 3.9 ^.9 .1 .7'J .6.5 128 17 17 7.0 4.: 2.9

46K 17 17 7.2 4.1 2.8 2' 87 17 15 7.4 4.1 2.7 .1 .70 .61" 23 23 3C' 15 7.6 4.0 2.6 .1 .70 .6J 24 15* 1,4" 14 7.8 4.C 2.6 .1 .7? .6,'

27 242 3CC 13 6.8 3.8 2.3 .0 .7C .60 i:\ 13 6.5 3.8 2.2 .0 .70 .63

.90 .6, .*>j

KF.AN 16: 27.3 9.76 4.34 2.95 .21 .75 .58 MAX 2.27C 1,90'J 103 30 5.7 3.6 1.8 .90 .6.' M1N 0 17 13 6.U 3.7 2.J .90 .60 .5, AC-FT f i 9,83; 11,580 1,683 581 267 176 75 46 J5

135

-

1 .60 .33 .15 .42 .55 117 .Cl 2 .33 .05 J 3 .52 4 .53 .34 .27 .45 .57 28 0 D .52 .42 .33 .45 .53 IB .03

6 .51 °,.b .34 .45 9.5 C 0 7 -5C 4.5 .36 .47 .44 8.5 C

9 .48 1.1 .64 2.6 6.0 .08 0

12 .45 .64 .4; .71 .92 2.2 3 13 .43 .71 .38 .74 .89 1.1 C 0

15 .4C .74 .37 7.C .67 .19 C C

16 .42 .74 .41 4.3 .62 .19 C 17 .44 .63 .43 3.6 .00 .13 .04 J IS .46 .44 .45 1.3 3.3 .13 0 0 4." 2'.19 .48 .42 .45 3.1 .11 3 .5: .42 .46 2.4 4.2 .11 c 0 21 .52 .41 .46 .48 .37 .09 c 0 23 .58 .39 .45 .6.. .78 .07 3 24 .61 .34 .45 .61 .32 .07 0 0 25 .62 .31 .46 .55 .IB .05 .49

27 .58 .21 .46 .39 .48 .38 0 .60 2t .59 .2: .43 .38 45 .09 0 29 .54 .21 .42 .35 .19 c 0 3J .42 .16 .42 .42 .42 0 0

.10 .89 .41 1.4" 2.69 7.51 .016 .080 C o : o MAX .62 3.6 .64 7.C 45 117 .19 1.4 0 0 C 0 .35 .18 .15 .35 .18 .05 3 0 0^0 AC-FT 31 53 25 86 149 462 1.0 4.9 0 0 0 0

24,380 812 feet pe cond, gage height in feet).

nd peak dis, chars,! 1966-70

,e Disch. C.ll. Date Ti»e nisch. C.ll. Date Time Disch. G.M. -.68 19h 5 10 *4,020 IS. 12 Apr. 4, 196- 1600 235 leb. IS, 1969 1200 335 8.28 1P6" 1"2 1965 10 1, 7 60 12.00 \pr. 11, nino .:s leh. 23, 1969 1130 4,040 12.48 UlfiS 10 1,4 7 0 11.45 Teb. 28, 1969 1230 342 7. 7 7 196" 10 274 ".63 Vov . 21, 1200 160 7.60 Apr. S, 1969 1530 930 9.68 Nov. 30, 1367 0600 250 7.92 10 29" 7.75 Mar. -, 1968 2400 *460 0.32 Nov. 6, 1969 0130 150 6.65

.3 13 .e C . C 0 0 . K 0 .3 9 . 4 . : . < " . C 000 .K .0 8.* .? : . o ; .5 7.9 .? c . c 3 . : .1: o J .5 6.6 .3 0 . C & . .20 0 0

.0 6.2 2 C .0 .20 0 0 .0 5.8 .2 0 . j o . r. .10 .1; j . C * . 7 .1 * n ? .0 .10 .1.- 0 i. .0 3.6 .8 'j . C J 0 .13 .1" .60 .S 2.8 .6 0 . C .1C 0 C C l.l > .0 2.C .6 C 4.1 C 0 C .PC .C l.B .6 ,J ^ 3.6 C C C .42 ^ .C l.B .2 £ r i) C C " .10 14 .7v 1.6 .1 15 j 3 .13 0 C .1; 1* .41 1.* . 9C 0 C 0 .1C 0 L- J

515 .3? 1.4 . 7C J I. J .10 J 0 0 ?3? .2" 1.8 .7': c c C i. C 113 .2' 1.8 .1- c 5 C '. 0 0 15 . 2C 2.2 .70 2 .50 .10 0 3 f 6.2 .20 2.2 .7C j .20 .10 r o o .K-

1.0 .2-1 f . J . 6C C C .1C C u 0 .60 67 .2' 2.: . 6>-< C i. .! " 0 .i; .50 1? .20 1.3 .60 0 ». .1C 0 j .1C .I? 32") . 2 - 1 . '. . 4C. 0 0 '. o o r, .so 5B . 1 ; 1.8 . 4C J 0 J 0 (1 - .2!

15 .1C1 l.tt .30 0 (i .10 0 0 0 .1C H. .11 1.9 .20 0 C .10 0 J 0 .K 6. .20 1.1 .20 0 0 .1*0 J 0 0 3. 62 i 2.-) 0 C .10 0 C 0 C 3. 12 r BB C 0 C 0 - C C 5 ; 12 3 j C

3 1,495. 83 3. 10 201.6 66.40 4. C 1.70 8.70 .HC .HO .81 6.10 G 49. T 51 4.1 .10 .23 .10 1.1 0 .10 1.4 .2? 0 1 0 0 0 0 C C 2.97U 1 650 4C4 132 S 5 3.4 17 1.6 1.6 1.6 12 ATASCADERO CREEK BASIN

11120000 ATASTADERO CREFK NEAR GOLETA, CALIF.--CONTINUFD

1 9..' .2'' 13 .2 .lv 7 " C 121 c 8. n .2 6.6 .3 .i; 3 : ' 172 T.S .2 2 . ^ .3 .10 ' . 1 . 17 5. ~i .? 39 .C .1C 1.2 3.5 . 1 12 .v . ir

t j .'.6 72. 2.S . 1 5.8 .5 .1C 7 < 99 B4 J 1.5 .1 27 .5 . 1 '., i : 4.6 22 1." .1 8.4 .6' .2 . i : c' ' . b: 12 . 1 5.4 .a .ic 1 " .2' 8.9 .*: .1 If .c .1:

11 C .2: 7.4 .6 .2 47 .C .1" .1: 1.' ? .IT b.4 . 6 : 5 12 .8 .13 .1C 1< . K ; 3.9 .6C 3 H.o .6 .1C .1C 14 C : 2.8 .6. 2 fl.4 .2 .10 i r> ; r 1.6 J .61 1 7.9 .1C

ifc T i.e C .6r- 1 7.4 .(? .K t7 o ; 1.1 . : .6- i 7.0 .7 .21 ! < ' -' .8' .6" .9 39 .B .2C 19 C ^ . 5-~ . . 6j .9 2* .8 .K ' r .1" .3- .6" .4 14 .S .1C

21 S .3' .z; " .61' .4 26 .6 .10 2.1 C .i: .2' 151 6'"' .4 21 .6 .3C '* C : .2"1 14 .6t .4 7.4 .4 .20 2-. 3 ' .1" 963 .6' .C 0.4 .4 .10 ? ~i 0 C . 1 - 1 3 4.1 .6 6.6 .2 .in

26 C '. .1'12 .<, .C 6.6 .30 .10 27 i- .1' ?4 . 2 .0 6.6 .3^ .10 2^ C .I 1 .1 L'C .2r .C 6.6 .20 .10 2> 0 .<,: .1- 10 .4 6.6 .20 .1C 3. C .1C .If 2? .9 5.4 .1: o 31 r. .1- 9.

MF.A'1 . }. ! 3.61 41. S 43 S 1.8R .87 13.7 1 .39 .11 4.7 .30 M '. : .2"' .10 2.5 .10 ; »(,-FT .2 2li 2,^5' ?,7 I ''4 545 816 85 6.7 f.AL YK H66 TOTAL 1,687. 5C MFJN 4.62 CAX 7':j MIN 0 AC-FT 3.35C

r.E, IN CURIC FEET PER SCCONU, HATER YEAR OCTOBER 1967 TO StPTEMBER 196H

"Er JAM FE" MAR APR MAY JUN JUL

.4'' 2.3 1.9 . U

1.6

.61, 4.9

MEAN WAX KIN ATASCADFRO CRFEK BASIN

11120000 ATASCADERO CREEK NEAR GOLETA, CALIF.--CONTINUI'D

ner. MAR JUN 1.1 1.9 1.9

5.4

.16 17 ,vl ' .34 ' 12 B.4 .4 .\J .'3 - .Cl .1 19 0 0 : 51 11 7.8 .2 .1C .(3 0 .31 .' 1 19 ? ", 0 l,2B- 11 7.1 .; .ic .cio ' 2'. C - r. 414 I' 7.3 .B . ! ..,5 0 C

21 C : C 1,12^ 41 1C .H .1C .16 3 .01 22 C -i * 1TC 15 7.0 .8 .14 .C8 -1 0 23 C o L 28 f-7 6.6 .5 .14 .j7 D ' ..2 24 C 0 C 635 799 6.6 .3 .16 .05 J ...1 .'.I 25 B I 1.3 2,41C 162 6.2 .3 .14 .C5 C 26 C ..1 2.3 612 49 6.0 .14 .Cl 0 J 27 <, .vl .01 15: 27 5.4 .1 .:a .'.5 c 2* . 'I : .?2 90 113 5.3 .1 ,i'7 ..7 3 . 0 .1 .05 .C7 .34 3. .16 o J 40 4.8 .-) .03 .05 .05 a : ,35 .Ji -1

J.6 20.70 1.4fl .94 .33 .58

CAX 13 5.4 9.: 2,41. 799 46 149 1.9 .16 .12 .05 .16 M 1". 3 1' . 1.4 4.5 .9 ,;3 .01 C AC-FT 79 11 47 14,127 5,34' B14 S14 41 2.9 1.9 .7 1.2

H

1 .'-I .09 .06 .C3 .12 258 .12 0 .09 .'^2 .C4 .:i 2 .:) .16 .06 .^3 .12 35 .27 ^ .26 .0? .04 0 1 . r'3 .i6 .03 .j3 .12 6.6 .2. 0 .C9 .;2 .07 ) 4 . ; 1 . ; 6 .03 .1 .12 141 .21 .:! .C6 .02 .12 C 5 f .-;9 .01 .03 '.12 35 .13 C .02 .02 .17 .02 6 C 64 .01 .-3 .12 6.5 .1', .LI .02 .32 .1- .'-.2 7 0 5.9 .01 .* 3 .1? 1.5 .16 .01 .0? .02 .05 .:2 a c i.; .2- .03 .12 .35 .20 0 .C2 .0-2 3 > f .39 .60 41 14 .15 .12 3 .C2 .02 C i: .a .16 .16 13 12 .04 . }8 0 .''2 .Jl .02 11 .01 .09 .09 3. 10 .02 .04 0 .02 .07 .CM .0 12 0 .,6 .C6 2. ' 1.2 0 .04 0 .02 .03 .C5 ,-j 13 C .'.6 ,C3 . C .80 C .C2 1 .0? .13 .Cb 14 0 .:ft .01 . .- .«£, .: .33 3 .02 .14 .11 ." 15 0 .6 .01 I. .3" 0 .C7 : .02 u .1C

16 .j6 .,6 .f3 36 .2 r (. .03 0 .02 C .04 17 .28 ...3 .03 7.8 .?C 5 .C3 0 .02 0 .Cb IB .12 .13 .01 .45 .2C 0 .04 fl ...2 u .09 .0 19 .09 ..'.I .C3 .12 .12 j .:i .05 .L2 3 .23 .0 20' .03 .01 .'.6 .12 .12 .C2 . "i : .02 o .37 21 .01 ..,1 .C6 .12 .12 0 0 1 .02 3 .01 .1 22 .01 .,1 .C6 .12 .12 0 .Cl 0 .1,2 j .Cl 25 .12 .Cl .06 .12 .12 .11 .Cl 0 .C? 0 .Cl .C 24 .03 .C-1 .06 .33 .12 .11 .17 .ol .02 0 .ri .: 25 .03 .C3 .06 .24 .20 .11

26 .06 .:6 .03 .12 .20 .18 .01 .05 .u2 0 .05 .1 27 .J6 .06 .03 ."9 .2' .29 0 .09 .C2 0 .04 .0 23 .06 .T6 .03 .C6 134 .25 .01 .07 .02 0 .C4 .0 29 ,'jb .06 .03 .36 .16 C .If .02 .01 .03 .j 3: .-,3 .J6 .01 .12 .14 .01 .10 .C2 .C3 .02 .C7 11 _n .Pi . ->r .13 .11 ,r,7 , cl ______

TOTAL 1.18 72.75 2.11 105.91 175.98 485.66 2 .1U .64 1.C2 .62 2.07 .98 MAX .28 64 .f 43 134 258 .27 .11 .26 .14 .32 .14 MIN 0 .01 .0.1 .C3 .12 0 0 0 .C2 0 B J » , right h.,n k at I'attcrson Avenue Bridge, 1.1 miles downst DRAINAGE AREA. --5. 51 sq mi. PI-RIOD OF RECORD. --January 1941 to September 1970. CAGE. --Water-stage recorder. Cone f .61 ft [revised) to le c. -4, 105 5.50 ft higher. Dec. 24, 1955, to Jan. 10, 1960, at datum 1.5 ft higher. UTRAGE DISCHARGE. --20 rears, 1.86 cfs (1,350 acre-ft per vear); median of yearlv me a discharges , 0.8 cfs (580 acre-ft per vear). etl. 6-"0 years 196 Date Time Disch. G.H Date Time Disch. G.H. Date Ilisch. c,. 1. ,\ov. 16, 1965 1700 *1,700 9.3 2 Jan. 22, 19b7 0015 482 4.69 Jan. 25 969 0201 *2,000 10.1 1 Nov. 24, 19bS 0100 1,450 8.5 0 Jan. 24, 196 7 1230 *1,620 9.08 leb. 6 t 069 - Dec. 20, 1965 0530 1,360 8.2 1 Apr. 4, 196 7 1730 105 2.04 leli. 24 , 960 2000 662 5.41 Jan. 20, 1966 0460 100 2.9 7 Apr. 11, 1967 0015 109 2.95 \pr. 5 ' 960 1545 318 4. 13 Nov. 7, 1966 1115 352 4.1 7 Mar. 8, 1968 0115 *121 3.25 Eeh. 28 , 9"0 1245 *340 4.12 Dec. 2, 1966 2315 558 4.9 9 Mar. 4 970 1900 219 3." Dec. 6, 1966 1400 1,280 7.9 2 Jan. 19, 1969 1100 260 3.82 tan ual minimum daily discharge, »ater rears 1966-70 IVtr yr Date Discharge Utr vr Date UUch.lVi.c 1966 Several davs 0 I960 Oct. 2, 1968 o' 1967 Sept. 3, 1967 .06 1970 Several davs 1968 Several days 0

xiinurn gage height, 12.74 ft Jan. 21, 194.3, present

Rl VISIONS). --KSP 1928: Drainage area.

I .10 .8 1 2.7 .71 .4^ .4j .23 .10 .r .K 2 .1C : .5 .6 2.: . ae .4; .40 .2 . 10 .r. .1. ' .i:> - .3 .1 1.6 .7C .5- .30 .2 0 -1C .i- j 4 .10 - .2 .? 1.5 .70 .4: .40 .2 C .10 .U i 5 .1C .1'. .1 .: 1.5 .70 .3; .30 .20 .1C .1C 0 f> . n .ic .1 .5 5.1 .70 .3C .30 .20 .1C .1C C r .10 .ic . i .2 2.7 . 6C .3! .3C .2 c .1C .K C 8 .K .10 .0 .7 2.C .6C .3'" .40 .2 0 .1C .1C 0 9 .1^ .10 .2 .4 1.6 .6C .4r .3: .2 o .1C . IZ 0 1C .I.1 .1C .2 .j 1.5 .60 .V . 4>J .2 c .10 .IT L, 11 .1C .1C .1 .6 1.4 .60 .30 ,2C .2c .10 .1C 1 .1C .1C .4 .6 1.3 .60 .3J .20 .1 L .10 .10 u 1 .10 .1C .6 .5 1.? .60 .30 .20 .1 c .10 .K (j i .10 ,y- .2 .4 1.2 .60 .40 .20 .1 r .10 .10 » i . i : i . t .1 .3 1.1 .50 .y .2C .2r .1C .If .10 1 .1C 203 . 9^ .2 1.1 .50 .4v. .20 .20 .10 .I''. .1- 1 .10 75 .9" .1 l.r> .5' .40 .20 .1 0 .10 . 1C 0 1 .1? 32 .8." .1 1.0 .50 .4C .2C .1 0 .10 .10 . !) 1 .10 6.4 .70 .1 .9C .50 .40 .20 .1 0 .13 .1C . J 2' .13 3.2 .7J .1 .90 .50 .40 . 3J .10 .1C .K . C

n .10 1.8 .70 .1C .50 .40 .30 .10 .10 .15 . 0 2' C 30 .7" .'1 .90 .50 .40 .30 .1 0 .10 .10 . 0 23 C 48 .70 .0 .-in .5') .4C .2i .1 0 .10 .10 . 0 24 C 190 .6^ . J .8C .5" .40 .20 .1 G .10 .1C . 0 25 C 22 .6'" .90 .HO .50 .4C .30 .10 .10 .1; . c 26 J 7.8 .&r .9: .3C .50 .50 .30 .! C .\'j .1C . S 27 C 4.9 .6" .HO .80 .50 .5C .30 .1 0 .10 .10 . C 20 T 3.5 .70 .nj .flf> .50 .5C .30 .1 0 .1C .1C 2 29 .; 2.7 324 .90 .50 .50 .30 .1 3 .1C 1^ .0 3- C 2.2 46 23 .50 .50 .20 .1C .1C 31 0 24 4.' .50 .20 .10 o TOT&L 2.1T 635.50 423.10 98. 2C 40. If 17.60 11.80 8.40 4.30 3.10 3.0^ 1.7C .10 .1C .10 MI" j C .60 .8^ .1C .5C .30 .20 .10 .10 : r 195 8C 35 23 17 8.5 6.2 6.C 3.4 S V.\ JOSI CR1TK BVSIN

11120501 SAX .rosr CRIFK VJ:AR coirrx, r\Lir.--co\TiNunn

1 .10 .1: .4' .8'. -J.4 1.1 4.9 .5 .86 .77 .U .14 .20 .1C 68 .".(, 1.6 1.1 *-.<: .2 .93 .40 .2^ .1 3 i . 1 " . 1 .' J .7 7.4 l.l 3.5 .1 .81 .41 .17 ."6 4 .1-. .1" ,j .7- 6.5 1.1 16 .C .81 .4B .41 .17

! .2) 78 3 .7 . 4.7 1.2 17 .7 .68 .30 .57 .45 .70 3.1 1 .f, 4.3 1.7 6.1 .2 ,71 .29 .23 .63 1. .2'. .5: .5 .( ?.' .97 6.2 .1 .67 .77 .3.

11 .1C .4C .4 .73 3.3 3.0 26 .B .67 .21 .31 . 7 12 .i: .4? .0 .7') 3.' 27 11 .6 .71 .23 .25 13 .1C .40 .8 .7' ?.6 15 S.I .6 . .65 .26 .25 . 7

15 .2.1 .4i' .5 .6 J ->.5 5.5 6.1 .5 .58 .25 .25 . 9

17 .70 .4.. .3 .7.' ,?. 5.^ 4.7 .3 .50 .25 .41. .34 ! ' .2 11 .4. .2 .6; 1.7 3.3 15 .4 .53 .'5 .46 .36 1 > .1C .4,, .2 .6C 1.5 3.2 11 .5 .4B .25 .51 .16 .17

21 .1- .'>. .1 .70 1.? 2.3 15 .4 .8 .71 .64 . 1 7 27 .1C .50 .3 1- 1.1 1.9 16 .3 .9 .14 .48 .2' 73 .11 . 5 : .0 l 1.7 2.2 9.9 .2 . 9 .14 .3? .19 24 .1? ,4C .0 34 1.5 2.5 9.? .96 . 0 .14 .25 25 .1- .4. .90 15 l.f, 2.1 7.4 .«5 . S .12 .22 .79

2fc . i; .4: .9i) 2 1.1 1.5 6.2 .92 . 8 .1C' .27 .2C 27 .1' .40 .B 1 1 1.7 l.-> 5.3 .OB . 9 .11 .37 .IB 21 .! .5'. .8' 1 1.1 1.4 4.B .SI .29 .1'.- .36 1.4 4.5 .31 .29 .K .2^ .28 1.4 4.C .HI .34 .14 .17 .77

8.81

.6B M1N .1.'. .1 .4: .6L l.l .97 3.5 .tl .29 .1., .12 17

PIN - AC-FT 1,9U

SCP

J .37 3.4 .37 .21 . j6 .f.4 .C,?

.03 7 .2' .28 .96 .42 .32 12 .54 .25 .16 .14 .C4 .03 > .19 .28 .79 .",3 .32 25 1.7 .77 .18 .16 .'-7 9 .19 ,?K .8.- .42 .37 1.9 2.9 .28 .22 .16 .1:7 1 .19 .28 .67 .57 .37 .95 2.6 .28 .20 .12 .C<>

11 .19 .28 .69 .ts .37 .63 2.6 .26 .16 .12 .C4 ..7

13 .78 .28 .60 .49 .37 5.3 2.3 .33 .C9 .10 .C2 .1,6 7.1 2.3 .25 .C8 .12 .Ct

.1 J 17 .16 .37 .54 .48 3.' 1.1 1.8 .23 .--8 .08 .06 If? .16 .36 1.3 .48 1.5 .93 .37 .26 .OB .OR .06 .OH 19 .16 2.6 1.6 .45 .9' .08

21 .16 4.8 ,8'l .21 .42 .64 .37 .17 .13 .04 .C4 .T6 22 .19 1.9 .6. .36 .37 23 ,?8 .67 .33 .37 .32 C C

.01 27 .28 .43 .4B .41 .42 .C3 .39 .48 .41 .15 .12 .34 .01 .10 3C .28 4.5 .37 .ST. .49 .37 .17 .10 .06 C .10

AC-FT 14 48 4? 77 2° 124 8? 15 8.1 5.1 1.9 3.1 !CT

1 . 6 .16 .2P .37 7.: 32 2.1 1.7 .5 .41 .?? .17 .11 ,2K .37 b.5 7? 3.1 1.7 .6 .41 .23 .21 3 .73 .7i> .' 5..' Ift 6.1 1.7 .» .37 .3i. .^a .7 .37 .32 .'9 .25 .37 .<, f,.^ 13 5C 1.7 .7 .17 .24 . K1

£ . .a 7 .27 .37 .1 17 1C 7.9 1.5 .3 .5t .36 .4C .74 .37 .37 9. P. 4 5.7 1.5 .3 .52 .4'. .42 .2f .3*. .37 8.!^ 8.0 5.C, 1.4 .3 .46 .4. .42 1 '

11 .77 .4P .37 6.4 7.3 3.-1 1.3 .19 .79 .41 .37 t.9 8.2 3.9 1.3 1 l .16 .3 .31 .K,4 5.5 7. H 3.7 1.4 .2 .46 ,3B .38 14 .4 .4 .39 .41 .59 .0 .Po 21 6.C 3.r 1.3 .4 .4 .39 .5..

16 .71 .35 .6ft .11 12 5.8 7.7 1.4 .4 .4 .41 .f-i.- 17 .71 .Li' .4' .73 8.1 5.5 2.6 1.5 .5 .4 .45 .>-.-. .71 .28 .4' '. ' rt.7 5.4 2.6 1.5 .3 .4 .43 .32 .19 ..>« .37 61 7.1 5.1 2.6 .5 .9C .19 .41 .28 2 .19 .75 .37 4; 'i.l 4.9 2.6 .5 .93 .16 .47 .28

21 .16 .37 58 7.6 5.1 2.5 .5 .9C .3U .43 .27 27 73 .16 .16 .37 12 144 3.3 2.3 .6 .90 .35 .27 .3: .13 .2? .3? 86 179 3.3 2.3 .5 .90 .34 .31 .26 25 . .7 .31 .42 4 : 111 3.2 2.1 .4 . »: .43 .2) .26

.33 .37 200 41 2.8 2.C 1.2 .86 .47 .24 .31 .32 .37 5? 27 2.7 1.9 l.l .09 .49 .26 .79 . .4 .1? .37 3;. 54 7.6 1.9 1.2 .46 .48 .27 .31 .31 .37 15 2.2 1.9 l.j .43 .34 .33 .43 3 . 15 .20 .37 1" 2.1 1.9 l.C .41 .25 .27 .33 11 . U

TOTAL ffAN .15 .77 .39 32.6 26.9 7.80 5.16 1.43 .19 .41 .34 .34 "AX .If .28 .37 4.8 2.1 1.9 1., .41 .22 .22 .17 AL-FT 16 24 7..CCJ lt49'J 48C 317 86 71 25 21 20

LAY flLT ->CV Dtr JA\I fF"< MAR APR MAY JUN JUL AUG Si=P

1 .3; . > » .45 ,9U .55 lv,6 .54 .16 .25 .17 .C2 .C7 .25 .17 .01 .C7 .23 .31 .38 .9: .6? lj .54 .13 .25 .17 0 .06 .21 .15 .34 .93 .73 25 .54 .7C .24 .17 i-. .L6 .la .39 .47 .98 .73 14 .4t> .20 .24 .17 . r 3 . 5

.19 4.5 .4fl 1.. .73 3.9 .46 .12 .23 .17 ,J6 .^5 7

. J'7 .64 .56 6.6 1.9 1.7 .43 .22 .22 .17 . r 2 ...5 t , .57 .54 11 J.r !.<, .45 .18 .27 .19 .C? .''S

11 .1; .45 .48 2.4 3.3 1.3 .37 .19 .22 .19 .01 . .5 12 . 38 .44 .4" l.« 2.2 1.2 .35 .16 .22 .21 .Cl ..5 .?! .73 3 .'.'5 14 .42 .48 ,HC 1.5 .SI .18 .17 .21 .2C ij .'.5 15

16 .16 >'. .42 5.3 1.3 .73 .45 .04 .2-' .17 0 .-5 17 .15 .4^ .42 3.2 1.3 .73 .41 .02 . 7. 3 .14 0 . , 5 .14 .42 .41 1.3 1.3 .73 .15 .ta .70 .06 0 ..5 .42 .37 .9) 1.3 .66 .33 .T9 .19 .36 ? .15 7 . .16

2? .42 .4? .54 1.4 .66 .17 .11 .19 .08 ,C6 .35 2) 24 .18 .36 .07 ..'2 25

26 27 .18 .05 .05 ,:2 .34 .37 .8': .54 85 .60 .23 .28 .16 .06 .T6 .02 29 .37 .18 .36 .06 .;i 3 .35 .18 .04 .06 .Cl 31 .30

MEAN .21 6 r: .52 1.60 4.41 7.12 .35 .17 .21 .12 .031 .044 KAX .37 4.5 .90 11 85 1C6 .54 .29 .25 .21 .09 .:7 KIN .08 AC-FT 13 36 32 93 245 438 21 11 12 7.6 1.9 2.6

UTR YR

I40TE HO GAGE-HEIGHT RECORD MAY 27 TO JULY 6. , long 1 bank 1.3 miles northw est of G iiviota and 1.6 miles u P tream from mouth. RAINAGL AREA. --18. 8 sq ER10D OF RLCORD. --Octob er 1966 to September 1970.

1 . t

ate Time Di sch. G H. Date Time Disch. G.H. Date Time Disch. 11.11. ec. 2 , 1966 2100 390 4 45 Mar. 13, 1968 0400 *94 3.53 Feb. 15, 1909 1015 498 4.72 ec. 6 , 1966 1330 530 4 80 leb. 24, 1969 1830 *2,340 -.10 an. 22 , 1967 0600 655 5 05 Jan. 21, 1969 0230 386 4.74 Feb. 28, 1969 1315 360 4.3- an. 24 , 1967 1100 *4 ,000 8 40 Jan. 25, 1969 0530 2,120 6.96 Apr. 5, 1969 1515 356 4.36 pr. 4 , 1967 1800 246 4 02 Feb. 6, 1969 0030 352 4.35 Mar. 4, 1970 1745 *161 3.08 A 96?'tr vr Date Discharge Ktr vr Date Oct. 23 to Nov. 3, 1966 .20 1969 Nov. 9, 1968 .03 968 July 10-12, Sept . 10, 24 25, 1968 0 1970 Sept. 20 -30, 19~() . 02 f P P , > ' ' 25, 1968.

LMARKS tic

AY JIIL Alir, SrP

1 .4: .2- .6" I.? 5.1 1 i .4C ,i~j 3- 1.2 4.5 1 .8 5.1 5.1 2.6 .4 .B. .t>.' 3 .4C .2' 14 1.2 4.2 1 .8 3.6 4.8 2.6 .? .BC .6' 4 1.6 1.2 1.9 .!) 33 4.8 2.6 .2 .-61' .6^ 5 .2 . .6; .b~.

6 7 .40 1.3 1.? 3.1 1 .B 12 4.2 ^.4 .2 .ft" .6j .4, .5"1 1.1 2.6 1 .*> T.-n. 3.9 2.4 .2 .6" .6. 9 .40 ,4C 2.8 1.1 7.2 1 .* 5.8 3.J 2.4 .2 .6." .f .4C .4o 2.2 1.1 7.6 .6C 11 4.2 7.4 .1 .6? .6 t

1 .45 . lo 1.6 l.C 7.6 1 .1 ?0 3.9 2.6 .1 .6." .6^' 2 1.4 l.l, ?.(. 8 .1 8.2 3.6 2.6 .0 .6.1 .6''. 3 4 5 .4-" . 5 j l.C 1. 2.2 2 .8 6.2 3.6 1 .n 6 .30 .6C .60 1.0 2.2 6 .4 5.4 3.1 1.8 .0 .6C .6 i 7 . 10 . 6C .8?.8'' 6 .30 .5- .9? ?.2 3 .3 1 2.8 2.4 .0 .6', .0. 9 . 3v .50 .80 .90 2.2 2 .8 2 2.B 2.2 .3 .6: .ftj .3; 1.2 .a: 1.'. .2.2 2 .6 9.7 2.8 2.3 .0 .6C .6.'

1 .33 .6C .80 1.4 ?.3 2 .6 4 2.8 1 .3 .30 .60 .80 18 2.: 2 .6 7 2.8 1.8 .80 .60 .6: 3 .2C .6L .BO 8 7.:, 2 .6 2 2.6 1.8 .80 .6r .6.; 4 .2C . 6C .an 9 4 2." 2 .6 2 2.8 1.8 .80 .6" .1C 5

6 2 .4 8.? 2.6 2.0 .60 .60 .di 7 .20 .6" .1 5 2.0 2 .A 7.6 2.6 1.6 .80 .6C .6C a .20 l.l, .0 1 1.9 2 .A 6.2 2.6 1.6 .83 .60 .60 9 .20 .6C .1 8.7 2 .0 5.4 2.6 1.6 .80 .5.:. .6.' .20 .6'.' .2 2 .2 5.4 2.6 1.6 .80 .5C .60 1

AM .32 .56 7.85 43.8 2.69 2 .79 9.89 3.45 2.15 1.31 .61 .64 X .40 1.5 137 954 5.1 8.1 3C 5.4 2.6 1.5 .8D 1.4 N .?C .73 .6J .93 1.8 .60 3.6 2.6 1.6 .80 .51 ,6C -FT 20 33 4B3 2,701 15C 171 589 212 128 62 38 38 11120550 GAVIOTA CRI-.EK N]:AR CAVIOTA, CALIF. - -COM IXU1 D

OAY CCT MHV DEC JAM r.-» fAR APR MAY JbN JilL AUO S£P

.6C .'O .30 .80 4.t> .60 .3: .III .06 .'4 .3' .6C . 31 .n: .83 3.4 .6 .40 . 1 J . "-6 . r. .5: .3; . ^ .00 .8' .b ' 1.5 .67 .4: .U .01 . 7 .50 .4C dC . 8- .60 \U .60 .40 .:» .10 . 1-. .:7 .51 .4C 2. .nj .60 1.1 .60 .4' .10 .13 .^5

.4 .4L .P. 1.7 .6J 1.1 4.9 .4: .10 .I* . ? .40 . 5C . 8 * . 8 1! 6.9 .8-J .H3 .4? .10 .1? . '2 .41 .tK' .aj .f'f. .81 .80 .47 .5." 9.e .ic .13 .:? .5: . flU . q; 3.4 .6 ,; .50 . 'lo l.l 2.4 .6P .5C .40 .1C .C7 .ill 1 .43 .60 .61 .HI- 1. 1.6 .81, .4: .40 .1C .CP .C,4

It .41 .61 .80 .8C .i^ .20 .4"1 .tc .H ~ 1.1 2.1 .10 .01 .-6 1 .60 .61 4.9 1.5 .81 ,?C .20 '.ic .07 !;? 1 .30 .e; 4.1 .Br 1.4 1.4 .6} .?1 .30 .u .>:& .^7 I 1 .30 2 . * 1.2 . 80 1.4 1.2 .t>\. .20 .40 .J7 .06 .v? 2 ,4t l.b .80 .tO 1.2 l.l .6C .2C .4C .05 .04 .14 .6' 21 .40 4.6 . ? > 1.1 1.1 .60 .20 .43 .14 .C4 .C3 2, .49 MO .6" . w 0 1. , l.C .60 .20 .40 .,.'4 .05 . 1 . 5" 2 .4.1 .60 .ft." i.r l.C .60 .20 .40 ."4 .C3 .1 I 74 .40 .6J .5C .8J l.l. 1.0 .60 .20 .2" .L2 .01 0

.5.' 26 .4: .< ; .80 .RC .60 .2J .10 . )3 .C5 .M 21 4 n . 6C .6" 1.4 . 80 .BC1 ,6C .70 .10 .C4 .01 .'2 .6' 2 f .43 .61. 1.' .81 .8C . 6L- .23 .10 .04 .M ..2 2S .4" .ac .6 r 1.4 .81 .8a .60 .20 .R ..4 .C? ..5 3u .43 5.4 l.'l ,8U ,6C .20 .1C .:4 .C6 .:t 3V .40 .60 1.? .20 .06 .Cf 1 T1TAL 13.00 ME ,bf. 5.4 4.1 1.4 4.9 15 4. ft 4.9 ,4f .10 .13 .-7 Ml\, .30 .3C .V .*: .8( .60 .61 .2' .10 0 .01 t 4.0 4.2 2.0

MIN .3u AC-FT 4,210

DISCHAKGIE, IN CUBIC FTET PCft SECOND, MATtR YFAR OCTOBER 1968 TO SEPTEMBER

JUL AUG SFP

1 .C5 .57 .16 .2j 17 33 7.8 5.2 3.2 .4 .8J .al 2 . 57 . C 7 .16 .25 13 60 13 5.2 3.1 .4 .8.' .73 3 .10 .57 .16 . ? y I'. bO 12 5.2 3.2 .3 .91 .74 4 .10 .16 .16 .25 8.6 43 9.4 5.8 3.4 .3 .90 .75 5 .11 .1C .16 .75 26 38 72 5.1 3.3 .4 .78 .79

6 .1C .16 .35 77 35 .'b 7 .11 .16 .42 24 32 17 4.9 3.3 .5 .89 .79 .13 .42 17 ?9 13 4.7 3.4 .5 .83 .78 9 .14 .03 .2." .42 14 27 1C .16 12 25 11 4.5 3.7

11 .21 .05 .35 .49 11 22 11 4.5 3.4 .4 .72 .74 .2- 12 .25 .T5 .43 14 21 1C 4.6 3.5 .3 .64 .77 13 1.5 .C4 .16 3.1 9.8 22 9.5 4.1 3.4 .3 .72 .H3 14 .42 8.4 18 .3 .73 1.', 15 .25 2. 1.2 .96 124 17 9.0 3.9 3.5 .2 .71 1.1

16 .07 .42 l.l .75 41 16 8.6 3.8 3.2 .2 .73 l.l 17 .04 .25 .Zu .75 25 15 Ib .16 15 8.1 3.7 3.2 .2 .83 .94 19 .05 .20 .16 141 36 13 7.7 3.6 3.0 .1 .81 .90 .2- 20 .25 .16 84 23 13 7.5 3.7 3.0 .1 .75 .81

21 .05 .16 .16 140 37 16 7.4 3.7 2.9 .0 .71 .*2 2? .05 .16 . 13 43 45 13 6.9 3.8 2.7 .98 .68 .85 23 .07 .16 .13 11 334 12 6.9 3.7 7.6 .93 .73 .a& 24 .05 .16 .35 137 421 11 6.4 3.6 2.4 .89 .73 .86 25 .35 .16 .85 889 267 10 6.0 3.5 2.3 .93 .78 .35

26 .05 .16 1.4 250 139 9.8 5.9 3.2 2.3 .0 .78 .85 27 .05 .2C .35 77 91 9.4 5.6 3.2 2.2 I .0 .79 .89 28 C7 .20 .3.1 60 16C 9.1 5.4 3.1 1.9 .99 .82 .85 29 .23 .20 .25 45 -_ __ 8.6 5.4 3.1 1.8 .95 .84 .81 .16 .2C .2D 8.4 5.4 3.0 1.7 .87 .87 .71 3^ .C7 .2" 22 8.1 3.2

MEAN .25 .22 .33 63. C 72.7 22.9 11.4 4. 09 2.97 1 .19 .79 .84 2..' KAX 3.4 1.4 889 423 83 72 5.8 3.7 1.6 .91 1.1 MIN .04 .33 .13 .20 8.4 8.1 5.4 3.0 1.7 .82 .64 .71 AC-FT 15

CAL YR 1968 TOTAL 711. (,3 MEAN .58 MAX 15 MIN Q AC-FT 419 MIN .03 AC-FT 10.640 11120550 GAVIOIA CRI.T.X ,\'l AR GAVIOTA, CALIF.--CONTINUED

I .72 .53 .54 .62 .84 6.2 1.0 .64 .39 .16 .07 . .5 . ^S . j6 .''7 4 .72 .61, .4' .65 .90 23 .94 .59 .35 .11 .05

b .^7 3.2 .49 .65 .94 2.3 .91 .6: .36 .10 .1.^ ..4 .04 .11 .04 .J5 '3 .7! , fjh .67 I I. 1.5 .87 .58 .36 .12 .Ob .?7 I .74 .--,7 .57 .9 1 . 1.4 .85 .55 .32 .11 .C5 .:6

11 .B3 .53 .57 .6 2. 1.3 . 1 .46 .3C .11 .C4 .C!> 12 .71 .49 .57 .t 1. 1.3 3 .47 .3 I. 1.2 1 .46 .31 .11 .C5 . ;7

1* .77 .57 .61 .6 1. 1.3 5 .4C .28 .C5 .'.4 16 .96 .56 .57 .4 1. 1.2 5 .36 .28 .35 .C4 17 .11 .S3 . .57 I.I 1 .38 .29 .05 .C4 .C5 19 .7* .51 .6 ' .1 1. 1.1 3 .38 .27 .05 .C5 .',5 ?' .70 .54 .65 .1 I. 1 .38 .26 .06 .T5 .04

.1-3 2; .70 .57 .62 .1 1. 1.1 2 .39 .27 .04 .C5 23 .77 .55 .57 .07 I. 1.1 9 .42 .29 . J4 .C6 . -.3

2-i .74 .52 .6? .91 1. 1.2 5 .47 .23 .12 .04 ,C4

77 .66 ,5i. .5f> .85 I. 1.2 6 .49 .21 .10 .05 .1 2 2°. .59 .49 .57 .85 U 1.1 5 .43 .19 .C8 .06 .:

8.63 2.83 1.56 1.33

*«X .96 1.2 .72 12 14 23 1.0 .64 .39 .17 .07 .C7 .02 AC-FT 44 37 17 5.6 3.1 2.6 11120600 JALAMA CRLEK NbAR LOMPOC, CALIF.

mber 1965 to Septembe

CF DISCHARGl . - -5 years, 3.43 cfs (2,490 ac re- ft per year). feet).

r 1970

Time Disch. G.ll. Date Ti le Disc h. G.ll Date Time Di sch. G. 965 - la) Jan. 24, 1967 10 00 "1,7 10 8.0 5 Feb. 1 5, 1969 1045 845 6.t Feb. 2 3, 1969 1000 850 6.' 14, 1905 1930 560 6.05 Mar. 13, 1968 * 23 3.2 b Feb. 2 8, 1969 1200 466 5.' 16, 1965 1430 *1,430 7.70 Apr. 5, 1969 1500 437 5.6 29, 1965 0100 800 6.60 Jan. 19, 1969 11 30 4 69 5.7 5 30, I960 0100 469 5.76 Jan. 25, 1969 02 DO "1,2 10 7.4 J Mar. 4, 1970 1815 *184 4. o tlou Sept. 1-30, 1965.

flou for long periods i n each year. Period of record: Maxi 10 cfs Ja n. 24, 19 67 [gage sight, 8. r many day most years.

D£ about

1 W J JN JUL A G Sb

:. 26 3t .1 . i'. .4C1 .4 18 2 .7 .6 M .40 ,; 5 l*> I , ^ .0 . SO .43 .5 I? 1 . 4 .2 C ,4C . ? 11 1 .1 ? ^ .40 . .' 9.6 2 .1 .0 C .30 .ft 8.6 1 .1 .8 0 .30 .6 7.8 1 .1 .8 : .30 .8 .4 7..' 1 II .8 .30 , ..6 .? 5.C .C .2 0 .3C C 141 .-1 4.4 \2' .0 C .30 .R 4.4 . 7 .0 . 0 .30 J . 2i .8 4.4 .3 0 .20 i: .8 4.4 ? ° 0 .20

6.7 .* 4.1 .9 .8 C .20 I ? I .8 4.1 6 .8 0 .23 41 .7 3.8 . 3 .8 o .2: 0 46 .5 3.5 .8 0 0 . ?0 ?7 .2 5.5 7 .6 . C 0 0 .20 r

14 .0 3.8 .6 G C C .20 j.6 .8 7.0 B j B ^ 0 .?0 ? f 7.8 1 3. ^ .1 . 4 C .20 J 6.7 19 4.1 .4 C 0 .20 0 5.9 5 99 - B 2 . 0 0 .20 0 ----- 4 17 . 0 .20

; ?9.7 i . ^ 10.6 1 .2 3 37 1 .45 . 8 0 .27 1 C 1C6 94 99 38 .7 2.2 1 5 30 .40 L1 . ] : .5 3.5 .1 ^ 2 .80 . 30 0 .20 JALAMA CRbLK BASIN

niSCH«,BER US' r«v .2'- i .20 J.3 1.4 1.7 3.3 1.0 .6.1 .20 .1. 24 .61 1.5 2.2 3.C l.C .60 .2 3 .2C .1C I ,5J 1.? 1.5 1.? 2.8 .93 .7C .2.: 4 .2C .1 j 1.4 .5- 1.; 1.5 4.9 2.6 .9" .73 .2 5 .?- . tu 1.2 .6". 2.8 1.4 4.4 2.6 l.l. .91

6 .?0 .5C 9 .50 2.6 1.2 ?.2 2.6 l.C .90 .2. 7 . 1C 1.5 6.8 . >., 2.4 1.2 2.8 2.4 .90 .83 . ?'-. 3 . 1C 1.2 1.7 .'.'. 2.2 1.2 1.8 2.4 l.C .60 . 2 -' 9 .11 ?'- 1.1 .60 7 . J 1.2 1.7 3.C l.C .50 .2'. 10 .13 .5 .9"! .6^ 2. ' 1.2 1.5 3.2 1.0 .50 .2 '

I .10 .50 .7: .6', ?.3 1.5 5.; 2.8 1.0 .40 .1: 2 .1- 3 .1C .4 ' .7' .4'. 1.8 2.2 1.8 . 90 . 4C 4 .1" 4 ^ .71 ,4'J 1.8 l.B l.t) 1.7 .80 .40 5 C .5- .60 .40 1.7 1.4 1.8 1.7 .70 .43 _-, 16 . TO .7'. . 6^ .4: 1.7 3.4 1.5 1.7 .70 .40 17 .10 .7C .6r> .40 1.5 2.8 1.4 1.5 .80 . 0 13 .1C .61'.60 .6C .40 1.5 1.0 8.8 1.4 .80 .0 .13 .5: .4) 1.5 1.4 6.3 1.7 .73 . C 2: .!« 1.2 .61 .4; 1.4 l.B 1.5 --

21 . 10 1.'. .5r ,4 r 1.4 1.2 11 1.4 .50 . 0 _ 2? .1C . 7'0 .5- 27 1.4 1.2 14 1.2 .53 . ". 0 21 0 .7: .51 4.1 1.4 l.l 7.". 1.2 .50 . 0 24 c .60 .50 3'3 1 . * 1.1 13 1.2 .60 . 0 .1: 25 c .& : .5,: 21 ?.2 1.1 6.1 1.1 .60 .0 c

?6 .10 .bu .50 1.6 1.7 1.1 4.7 1.1 .60 .0 J 27 .1C .50 .5^ 5.6 1.5 1.1 4.1 1.1 .60 . a o 28 .10 .8C .50 4.1 1.2 1.1 3.6 l.C .T: .20 29 l.C .sr 3.5 1.1 3.5 l.C f. !io .7C .50 9.6 !6? [10 31 .10 .5. 1C 2.C 1.0 .10

2.1' ) MEAN .11 2.63 13.2 1.46 1.87 .78 .41 .C74 MAX .2: 1.5 24 1C 3 5.1 3.4 14 3.2 l.C .50 MIN 0 .1.. .5j .4[ 1.' l.C 1.2 1.0 .50 .1C 4.6 ,:

0 ISCHARGEt IN CUBIC FttT PER SECONP, HATER YEAR OCTOBER 1967 TO SEPTEffibK 196P

JUN JUL AUG SFP

1 . 10 .1; 3r 3 . .7C .50 l.C . 3 2 .10 .1C .2' .30 .7C .50 2.0 . C 3 .10 .1; .21 .3u . 6f. .53 .80 4 l n .1C . 2'J .30 .6C .50 .60 . C 5 .1C .10 . 2f> . 3C ' .60 .5C .60 3

6 .1C .10 .2C .30 .80 .50 .50 . 0 7 .11 . U .2" .33 -8C l.C .40 . c 8 .10 .2" .30 .80 3.0 .4C . 0 9 c .10 .2" .10 .no 1.5 .4C 0 10 c . 10 .20 .43 .8C .90 .30 . 0

U 0 .ir .20 .80 .BC .80 .30 .10 12 0 .20 .20 .*3 .ec .70 . 30 .1C 1 3 a .30 .21 .47 1.4 11 .40 .1C 14 0 . 3C .20 .40 1. 1 2.2 .4C .10 15 o .30 .30 .40 .9? 1.2 .40 .1C

16 c .30 .30 .4J .81 1.1 .30 .10 17 0 .30 .30 .4! 2.2 1.2 .3C .10 18 U .1C- 1.1 .40 1.4 .90 .30 .10 19 c .70 .7f .4C .90 .80 .30 .1C 20 c .70 .40 .43 .80 .70 .10 .10

21 c .8C .30 .4u .80 .60 .3C .10 2? c .50 .30 .40 .70 .60 .30 .10 23 .60 24 .3C .20 .4'1 .7C .60 .20 25 .1C .30 .23 .4u .70 .60 .20 0

26 .10 .30 .2C .40 .70 .50 . ll/ D 27 23 .10 .30 .2" .83 .70 .40 .10 0 29 .10 .30 .20 .7" .5-1 .40 .10 0 3C .10 .80 .20 .60 .40 .10 0 31 .10 .20 .93 .40 0

TOTAL 1.60 8.80 8.43 13.60 24.50 35.50 12.00 2.30 0 C C C i' 0 MAX .1C .BO 1.1 .90 2.2 11 2.0 .10 C 0 MIN n .10 .20 .13 .50 .4C .10 0 0 0 c r AC-FT 3.2 17 17 27 49 70 24 4.6 : o C 0

WTR YR 1968 TOTAL 106. 7C MEAN .29 MAX 11 MIN 0 AC-FT 212 JALAMA CRhLK BASIN

11120600 JALAMA CREEK NIAR LOMPOC, C4LIF.--CON1IXUFD

K 1968

1 .24 6.8 5R 2.9 2.3 1.5 .57 .24 .19 2 C .06 .?3 5.7 39 4.2 2.2 1.5 .62 .23 .14 3 0 .15 .06 .25 ^.9 35 3.7 2.2 1.3 .64 .71 . - 9 J .C3 .08 .21 4.3 32 3.8 2.7 1.4 .62 .25 ,-H 5 5 .06 .21 9.1 30 69 2.3 1.4 .73 6 : . .07 ,?\ 24 27 24 2.2 1.2 .92 .17 . ; 9 7 1 .12 .21 9.3 24 11 2.2 1.1 .93 .24 .rf, 8 r .15 .23 H-l 20 8.5 2.1 1.2 .97 .9 . c 6

1C C i .!» .26 5.4 14 6.3 1.9 1.2 .44 . ' . ,4 11 .26 4.P 11 5.7 1.7 1.1 .78 .'4 12 ', .26 .26 9.9 1C 5.5 1.8 .97 .73 .9 ,~4 13 .-.2 v .1° .52 5.9 If 5.1 1.7 .82 .66 . 1 .v4 14 .17 : .3' 1.4 4.7 8.8 4.6 1.6 .82 .58 .4 .; 5 15 C .13 .56 .60 191 7.7 4.4 1.6 .82 .53 . . c)

16 ..6 .45 .4.1 54 7.3 4.1 1.6 .81 .52 .19 .1? 17 . J7 .26 .36 35 6.9 3.9 1.5 .76 .19 .:& If C .08 .19 1.6 25 6. 3.7 1.5 .88 .48 .25 . j6 19 r, .-7 .17 173 2-i 6. 3.5 1.5 .81 .44 .25 .07 0 .'7 .21 66 18 >,. 3.3 1.4 .74 .42

21 C. .C6 .21 99 26 7. 3.4 1.5 .72 .37 .IB .-6 22 25 45 6. 3.3 1.6 .66 .4C .14 ."-j 23 0 j .17 10 162 5.3 3.7 1.6 .61 .37 .11 . :. 5 0 C .2? 107 UR 4.9 3.3 1.6 .51 .37 .1 .f5 25 1 . .43 395 1J4 4.6 3.C 1.5 .48 .35 .C8 . 5 26 C . ,. 2 . 6fi 9C 55 4.3 1.2 .59 .37 .ce .i.4 27 0 .03 .41 5r 4- 4.0 2.6 1.2 .48 .37 .Cl ."4 28 .'.5 .31 27 15? 3.9 2.5 l.l .49 .36 .10 .J4

HE AM .J-6 . 32 .24 35. ' 41.4 13.8 7.29 1.70 .90 .56 .19 .064 WSX .21 4.3 3.3 AC-FT .4 1.9 15 11 3. a

1 .:4 .2<6 .18 .37 .64 11 . C .26 .16 .03 .26 .18 .37 .6C 6.4 . 0 .28 .11 3 .C5 .37 .20 .37 .6C ?.3 . 8 .25 .08 U 4 .08 .44 .26 .37 .65 22 . 6 .21 .08 .J6 .78 .31 .37 .63 12 . 1 .21 .C7 6 .C4 2.: .31 .37 .64 3.2 .5C .21 .10 7 -C5 1.1 .26 .37 .63 2.0 .47 .21 . U 0 .15 .92 .52 7.4 .59 1.4 .52 .33 .11

11 .16 .57 .31 12 13 .15 .52 .44 .SO .82 1.1 .39 .42 .29 .C6 .10 15 .08 16 17 0 Id .21 .52 .44 .R* .52 .82 .45 .C4 .25 19 C 20 .17 .59 .68

21 .17 .52 .6ii .68 .52 .71 .43 .C6 .17 0 22 .22 1}

24 .12 .,1 .01 .31 .40 .6? .68 .44 .80 .29 .22 .01 .08 26 .Cl .13 27 .31 .35 .44 .15 28 .31 .34 .44 .56 13 .73 .35 .21 .05 .14 29 .31 .29 .37 .52 .76 .34 .18 .04 .15 30 31 .26 .37 .60 .66 .IS .05 1.22 1 C NEAN 0 J MAX .49 2.C .68 7.4 13 22 .60 .42 .25 .15 0 C AC-FT 12 34 25 65 59 161 26 12 7.0 2.4 C 0 cd (not including Alder Creek).

height 139.0 ft

son lake and luded in th ( UOI'I KU I0\. --Reservoi Kl \1SIO\S IUA11 R -ILARS MONTHLY NET DISCHARGE, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1970

MONTH NET HEIGHT (ACRE- BIS- (ACRE- ( ACRE- JAMESON LAKE FEET) FEET) FEET) FEET -221 213 0 19 11 0 11 0 4 2,284 127 2,157 DECEMBER. 224 15 6,643 +2,629 31 201 3 2,864 110 2,754

CAL YR 1965...... +4,080 1,667 201 235 6,183 316 5,867 -24 34 2,220 10 2,240 0 2,240 223 88 6,604 129 519 15 648 13 635 223 32 6,5 4 -80 229 6 30 185 1 184 222 13 6,3 5 208 0 43 82 0 82 220 63 6,1 7 -208 200 0 46 38 1 37 218 95 5,9 9 -228 182 0 60 14 0 14 216 28 5,5 7 -352 281 0 64 -7 0 -7 213 97 5,2 6 -291 232 0 59 0 0 0 -205 154 0 35 -16 0 -16

WTR YR 1966...... +3,005 2,004 2,946 388 8,343 252 8,091

210 78 4,885 -186 147 0 24 -15 1 -16 211 03 4,915 +30 72 0 8 110 73 37 uECEMiifcR. 223 92 6,610 +1,695 12 1,150 4 2,861 138 2,723 CAL YR 1966...... -33 1,880 3,895 398 6,140 227 5,913

+16 6 1,950 7 1,979 114 1,865 FEBRUARY. 223 92 6,610 -16 39 621 17 661 9 652 224 0 6,623 +13 74 1,280 18 1,385 91 1,294 224 0 6,636 + 3 23 1,980 15 2,021 106 1,915 224 8 6,743 +117 133 280 50 580 0 580 224 6 6,712 178 3 64 214 0 214 223 5 6,555 -157 191 0 73 107 0 107 220 00 6,336 -219 209 0 64 54 0 54 SEPTEMBER 220 53 6,133 -203 202 0 37 36 10 26 WTR YR 9,993 542 9,451 218 95 5,919 198 0 31 15 0 15 218 53 5,863 -56 144 0 12 100 42 58 218 36 5,841 -22 97 0 3 78 5 73 CAL YR 377 6,853

-8 105 0 6 103 21 82 218 50 5,859 +26 87 0 13 126 17 109 219 56 6,001 + 142 97 0 25 264 38 226 219 10 5,939 157 0 34 129 20 109 217 65 5,747 -192 276 0 44 128 0 128 215 45 5,463 -284 310 0 50 76 0 76 213 32 5,195 -268 273 0 57 62 0 62 211 06 4,919 264 0 50 38 0 38 SEPTEMBER 208 86 4,658 -261 251 0 39 29 0 29 WTR YR 1968...... -1,475 2,259 0 364 1,148 143 1,005 206 77 4,417 -241 277 0 16 52 12 40 205 17 4,236 -181 205 0 10 34 9 25 204 00 4,107 164 0 7 42 21 21 CAL YR 1968...... -1,734 2,466 0 351 1,083 138 945 5 13,378 528 12,850 +28 0 12,960 6 12,994 315 12,679 224 05 6,629 -38 24 4,650 20 4,656 24 4,632 223 97 6,617 -12 183 1,480 34 1,685 37 1,648 223 93 6,611 250 583 45 872 0 872 223 54 6,555 -56 315 11 43 313 0 313 222 12 6,353 338 0 62 198 0 198 220 10 6,074 -279 356 0 68 145 0 145 359 0 40 131 0 131 WTR YR 956 33,554

245 0 25 24 0 24 215 59 5,480 -80 152 0 10 82 31 51 214 60 5,355 -125 177 0 6 58 2 56 CAL YR 1969......

JANUARY 1970...... 214 87 5,389 + 34 108 0 6 148 42 10 FEBRUARY...... 216 40 5,584 +195 136 0 12 343 39 30 46 27 1,200 79 1,12 APRIL.... 222 82 6,452 -159 230 73 42 186 0 18 220 65 6,149 -303 317 0 52 66 0 6 218 45 5,853 -296 264 0 56 24 0 2 215 62 5,484 -369 289 0 67 -13 0 -1 212 65 5,125 -359 281 0 66 -12 0 -1 SEPTEMBER 209 83 4,772 -353 284 0 46 -23 0 -2

WTR YR 1970...... -1,034 2.583 119 415 2,083 193 1,890 t GAGE HEIGHT AT 1800 HOURS. NOTE. FOR MONTHS WHEN INFLOW TO THE LAKE WAS SMALL AND OTHER QUANTITIES WERE LARGE, DISCORDANT FIGURES OF NET DISCHARGE MAY APPEAR. THIS ARISES PRIMARILY FROM THE DIFFICULTY OF COMPUTING NET DISCHARGE AS THE RESIDUAL OF SEVERAL LARGER QUANTITIES, WHICH ARE NOT SUSCEPTIBLE TO MEASUREMENT WITH A PRECISION NECESSARY TO PRODUCE A FINAL ANSWER WITHIN DESIRABLE LIMITS OF ACCURACY. SA.NTA YNE: RIVIIR B\SIN 11122000 SANTA YNI.: RIVI.R \BOVI. GIBRALTVR DAM, NT\R S-\\'TA BVRBARA, CALIF.

DRAINAGE ARLA.--216 sq mi. PF.RIOD Or R[ COIiU. --April 1920 to September 0. November 1903 to November 1918 (fragmentary) at and since December 1930, Jameson Lake. or to October 1945, published as "near Santa Barbara r-stage recorder and shai p-crested \\eir on diversion release measured at river gaging static ni;e t prior to Oct. :, 1955.

spill Records 3 land pai U 1969. flasbboai

1,333.86 ft". llo* regulated b;

bara and U.S. Bureai from Gibraltar Resei May 18-24, 1970 (sec citv of Tanta Harbai jring acre-ft; and Septe 935 a ed fr CUbraltJ lie Caclmma. loss from evaporation hhile hater \~a~- stored in Lake Cacluima, .VI acre-ft. COOPI.RATION. --Reseivoir-operat ' ..... - ... Rl VISIONS (1VVTLR YliARS) .--IVSP 11141: 1944. 1915(M). MONTHLY NET INFLOW, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1970 MONTH ELEVATION CONTENTS CHANGE DRAFT SPILL EVAPO- T 3TAL RAIN ON NET FEET) CONTENTS FEET) RELEASE (ACRE- (A IRE- VOIR (ACRE- (ACRE- FEET) GIBRALTAR RESERVOIR FEET) FEET) FEET) 1,388.98 10,628 -784 689 23 109 37 0 37 NOVEMBER...... 1,398.82 14,353 +3,725 164 19,980 34 23 903 532 23,371 24,650 22 25 357 338 25,019 CAL YR 1965...... 60 357 JANUARY 1966...... 1,400.00 14,854 -69 97 11,570 39 11 637 80 11,557 MARCH...... 9 2,587 1,400.00 14,854 -22 696 358 178 1 210 0 1,210 MAY...... 1,399.35 14,577 -277 689 17 192 621 0 621 1,397.59 13,842 -735 772 57 236 330 0 330 JULY...... 1,395.07 12,830 -1,012 855 99 240 182 0 182 1,392.31 1,794 -1,036 869 48 248 129 0 129 SEPTEMBER...... 1,389.72 0,879 -915 833 24 164 106 0 106 WTR YR 1966...... -533 6,488 65,316 1,637 72 908 990 71,918 OCTOBER...... 1,387.27 0,071 -808 763 13 114 82 1 81 NOVEMBER...... 1,389.03 0,645 + 574 324 31 36 965 250 715 1,399.48 4,632 +3,987 60 37,300

1,400.06 14,880 + 248 296 19,380 44 19 ,968 269 19,699 FEBRUARY...... 1,399.68 14,718 -162 175 6,990 76 7 ,079 20 7,059 APRIL...... 1,397.93 13,981 -903 146 29,670 57 28 ,970 257 28,713 1,400.45 15,049 +1,068 912 9,980 170 12 ,130 2 12,128 JUNE...... 1,400.22 14,949 -100 649 2,940 196 3 ,685 ^ 3,684 JULY...... 1,399.55 14,662 -287 678 629 264 1 284 0 1,284 AUGUST...... 1,397.89 13,965 -697 704 8 254 269 0 269 SEPTEMBER...... 1,396.76 13,504 -461 605 0 220 364 0 '.64 +2.625 5,591 123,261 1,531 133 ,008 1,368 131,640 OCTOBER...... 1,395.17 12,873 -631 629 9 149 156 0 156 NOVEMBER...... 1,395.85 13,140 + 267 368 3 59 697 129 568 DECEMBER...... 1,396.03 13,211 + 71 606 6 16 699 47 652 CAL YR 1967...... +12 665 8 24 709 70 FEBRUARV...... 1,397.24 13,698 +475 417 9 41 942 44 898 MARCH...... 1,399.95 14,833 +1,135 490 894 99 2 618 121 2,497 APRIL...... 1,399.79 14,765 -68 609 346 162 1 049 60 989 1,398.61 14,265 -500 676 6 A195 377 0 377 1,396.53 13,412 -853 664 49 A24Q 100 0 100 1,393.98 12,414 -996 706 67 226 1 0 1 AUGUST...... 1,391.40 11,465 -949 688 6 201 -54 0 -54 1,388.83 10,578 708 0 151 0 -2,926 7,226 1,403 1,563 7 266 471 6,795 1,386.37 B9.788 -790 726 0 89 25 32 1,384.01 B9.081 704 0 51 48 27 21 1,382.04 B8.530 654 0 23 126 55 71 CAL YR 1968...... 129,607 121,600 8 120 521 659 119,862 MARCH...... 1,400. 30 9,799 +6 324 45,770 77 46 177 36 46,141 APRIL...... 1,400. 16 9,756 78 15,001 MAY...... 1,399. 98 9,702 -54 582 4,830 168 5 526 0 5,526 1,400. 35 9,814 +112 575 1,620 170 2 477 0 2,477 1,400. 06 9,726 -88 0 l,14fc 1,398. 93 9,387 -339 527 164 356 0 356 1,397. 56 8,981 -406 479 5 98 176 0 176 WTR YR 19ft9...... -1,597 6,142 316,606 1,172 322 323 1,946 320,377 1,395. 84 8,483 -498 613 0 70 185 0 185 1,395. 74 8,455 -28 539 0 31 542 59 483 1,395. 46 8,377 -78 521 0 14 457 8 449 -153 421 4 11 1,524 101 1,423 1,400. 35 9,814 +349 489 2,010 37 2,885 97 2,788 1,399. 48 9,552 -262 609 8,150 64 8,561 177 8,384 APRIL...... 1,400. 03 9, 717 + 165 740 324 103 1,332 0 1,332 1,390. 03 7,015 -2,702 799 2,550 122 769 0 769 1,385. 94 6,105 -910 974 143 97 304 0 304 1,379. 63 4,819 -1,286 1,010 434 104 262 0 262 -263 182 0 92 11 0 11 1,377.39 4,393 -163 81 0 81 -1 0 -4,588 6,978 13,615 826 16,831 442 16,389 t ELEVATION AT 1800 HOURS. A EVAPORATION PARTLY ESTIMATED. B CONTENTS FROM CAPACITY TABLE USED OCTOBER 196 2 TO DECEMBER 1968. NOTE, FOR MONTHS WHEN INFLOW TO THE RESERVOIR WAS SMALL AND OTHER QUANTITIES WERE LARGE, DISCORDANT FIG URES OF NET INFLOW MAY APPEAR. THIS ARISES PRIMARILY FROM THE DIFFICULTY OF COMPUTING NET INFLOW AS THE RESIDU AL OF SEVERAL LARGER QUANTITIES, WHICH ARE NOT SUSCEPTI BLE TO MEASUREMENT WITH A PRECISION NECESSARY TO PRODUCE A FINAL ANSWER WITHIN DESIRABLE LIMITS OF ACCURACY. LOCAlIO:..--Lat 3 4°31'28" . 1° ng 119"41'11", in MV-.SKiSU \ sec. 11, T .5 \. , R . 2 1\ al Fores n left bank 700 ft dounstr ibraltar Dam and - Mile s north of Santa Rarbala. DRA1NAGL ARLA. -- 216 sq m PI RIOP OP RLLORD . - -April r 1941) . G^GL. --IVater-sta Datum of gage is 1 , prior to Ma; 21 , 1958. I XTRI.MI.S.--Maxi» 1966-70 are c

Maximum IVtr vr Date Discharge G .11. Date 19bb Dec. 29, 965 13,900 16 .30 June 4-18 , 1966 c 19b 7 Dec. b, 966 17,500 17 .SJ \1U. 14 to Sept. 30 , 196- (1 1968 Apr. 2, 968 618 8 .12 Mam d.,vs 0 54,200 25 .8 ill t . 1 . 1 '. b 8 , to J . 1. IK, I'.Ki'l J 19-0 leb. 28, 4,320 13 .18

e 2,100 cfs on basis o£ compu a ions o f flon fro n gate opening s and flo

R1MARKS. - -Record 11121000) ant Gibralt 2000) . Uu -ft, respe d 2,580 acre ft, res >cctivel\ , Iron, l.rcson lake.

RlUblONS IttMIR ^ 1.ARS 1 . - US 1 706: 1921-22. US1' 1041 : 1944. \SP 1315 11: Drainage area.

nischu KGE TN CUBIC Fftr PER StCONO, U4TEK VEfl R CJCTOBFR 1J65 TO SEPTEMBER 1966 CAY PCT

.40 .10 64 159 64 3.7 1.3 .10 1.1 .4. 2 . i .40 23 57 134 67 4.8 .90 .13 2. .8." .4. .30 57 74 121 62 5.6 .70 .1"! 2. . R . 1 - 4 . : .30 66 4v K3 56 7.6 .6C .ft. .5C .30 65 «8 1,2 51 9.3 .40 2.

6 . .' .30 61 48 9.^ .3-j 0 2. 7 . C .30 58 52 ?35 46 9.8 .35 0 1. .30 54 35 ?<>! 44 0 1. .8 . : <» . 11 .30 53 17 165 40 <* !BO 1. . 8 : . 4 7 I .31 .30 53 11 149 37 .30 1. .9 .4', 11 .31 .30 48 H7 U4 36 .33 .7' .4: 12 .31 .30 54 69 122 34 0 .30 1. .7' .4J 13 .31 .30 56 <> > 121 32 9.1 .3f 0 1. .7. .4^ 14 .31 .40 48 31 6.8 .30 c 1. .7 . .4, 15 .31 .40 43 4C 112 3: 7.2 .30 0 1. .8 .4C 16 .11 36 40 33 136 31 7.9 .2C r 1. .8' .'3 17 .31 138 38 26 1C? ?8 5.8 .23 c I. .8' .4; 18 .40 172 35 15 99 26 4.3 .20 c 1. .t .4 > 19 .31 95 32 14 95 26 5.4 .1C 1. .e: .39 ?0 .3- 81 32 C9 94 26 5.2 .If 1. 21 .31 77 32 . 4 B7 24 4.6 .1C 3. 1. .9 r .39 27 .40 132 31 96 86 23 4.8 .lu 2. 23 .4" 1,990 28 °2 flf 23 4.. .10 2. 1. .9t .41 24 .40 4,900 28 94 tl 24 3.5 .10 2. .8' .39 25 .47 1,040 28 d7 75 11 2.5 .10 2. 1. .1 .35 26 .4: 457 28 »1 72 .2C 1.7 .1C 2. I. .80 .35 27 .413 282 28 86 7C .2J 1.9 .ID 2. 1. .81 .35 28 .4^ 235 28 81 66 .20 ?.5 .1C 2. 1. .7. .3.' 29 .40 191 7, 580 P7, .20 1.6 .10 2. 1. .71" ,T. 3C .31 242 2, 720 99 .20 1.3 .10 2. 1. .1- .37 31 .31

MEAN .37 401 MAX .6; 7,580 7,580 564 ?7C 67 13 1.3 3.3 2. 1.1 .5: UN .3^ .10 .10 e; 66 .20 1.3 .10 C 1. .5: .30 57 49 24 111 I ALII

DlsCHAilGEt IN CUBIC FFET f>ER SECOND, W 4TER YEAR ncro JEK 1966 IT SI.PTE MbEK 1T67

DAY JUN JUL AIK; it^

I .33 .16 .10 12? 85 231 231 71 ?6 .7 2 .31 .17 4.-1 12T r? 81 264 356 72 26 .6 1'4 3 .31 .in 5.3 82 79 ?31 546 71 ?4 .5.. .33 . 18 .80 94 79 278 534 fO 22 .4' 5

6 .31 ./8 9, 90 37 58 7 .31 8h 44 74 417 168 62 18 .? p .31 .7rt 91 38 74 39P 175 61 17 .2 .2d .47 26 94 36 71 327 391 58 16 .? 1 .?5 31 15 .1

11 .28 .36 76 14 .1 12 .33 49 12 .1 13 .19 .33 16 ?7 228 51 12 .n 14 .13 .J3 90 24 22 695 406 35 50 10 9" 15 .13 .33 33 14 490 386 13 48 9.3 ;

16 .13 . 33 3fl 19 12 414 366 12 47 7.6 17 .M . 33 3': 6t) jfl 4(2 312 12 47 7.4 1 ! . 13 .33 2S 99 '2 35C 63? 12 6.1 1 > .14 ,33 87 K2 ?55 6,M 17 43 5.6 . 15 .39 Cl 95 :? 234 564 10 43 4.6 :

21 .15 .28 77 87 4.2 2? .15 . 14 46 1, n, 50 231 l.C-10 79 39 3.3 0 23 .15 62 360 an 216 P60 S3 36 3.1 r 24 2.6 : 25 .15 .1C 46 1, 31 1? 192 7C5 82 33 2.3 ~l

26 .15 .!> 42 43 94 188 650 a: 32 ? . ;. 27 .15 .09 32 38 97 182 63 P 77 31 1.8 '' ?S .15 .12 52 29 .15 .12 44 16" 1.3 : 3_ . 16 .11 38 586 71 23 1. C 31 .16 22

TOTM_

"AX . 35 0.4 9,890 ?t "70 ?6 .7 KIN .13 '""' .10 24 H2 ?3l 12 28 .90 AC-FT 13

58, "U.

PAY JUN JUL AUG StP

1 .1? .?c .1C 22 0 -1C 2.7 .51 i .1C > : .o .20 .10 51 0 .10 2.7 .55 3 .10 o c .u .?r ?. 21 c J 2.7 .55 <, .U J .13 .2: i 15 £ f 2.7 .55 b .11 i .K .?: c 9.8 2 2.7 .5-)

6 .209 .10 .2.1 .10 a. 0 -. 2.7 .21 7 .23 * .13 .21 . .20 7. 0 l 2.7 .11 R .20 r .1) .?: .30 6. 0 C 1.8 .C7 ) .21 '- C .1,1 .21 C 4. o 0 .55 .-'5 l~ . 20 ./ .1- .20 5 3. 0 L .55 C

11 .2? 0 .1C . ?0 6 3. 0 0 .55 0 1? .20 ,l< .2G 4 2. 0 C .55 C 13 .2" .1U .2C 4 2. 0 C .52 C 14 .23 ; C .1" .2C 5 2. ^ C .52 0 15 .20 J r .10 .2C 5 2. c j .50 0 16 .2; r f .K .?» 7 2. : 0 .58 5 17 .20 1 .1; .20 4 1. 0 C .71 0 H .20 .If .2C 2 1. c C .55 0 19 .21 . 1C 0 .10 .1C 9.8 1. 0 0 .55 0 23 . 20 . 20 c .1: .ic 9.e 1. 0 C .63 3 21 .2'! .4; 0 .10 .10 6.4 . 0 0 .90 .58 0 2? .10 .10 C .13 .1.1 .1C .0 0 2.4 .58 0 23 .13 . 1", f .1C .1C .10 . 0 0 2.7 .58 0 24 .10 .It ; .10 .10 .10 t r . ^ 2.7 .58 0 25 .13 .1? 0 .20 .10 .Id . 0 0 2.7 .58 0 26 .10 .1C f .2-0 .11 .1C .40 5 2.7 .58 0 27 .10 .1: : .23 .ic .ic .33 0 2.7 .58 0 2d . 10 r .20 .10 .20 .33 0 2.6 .58 0 29 .13 .20 .1C .30 .30 0 2.6 .58 0 3. .1C .3C 0 .20 .33 .20 0 2.6 .55 0 31 a ______: .20 .40 0

E«N .15 .'.53 C .12 .16 14.5 5.80 a .83 1.09 .10 : AX .20 .4: .20 .2" 55 51 c 2.7 2.7 .55 -j IN C 0 . .1" .1C 0 .20 0 C .50 '' i C-FT 8.9 3.2 6 ? 7.5 9.3 894 345 6 2 49 67 6.3 ri

HFR YR 1968 TOTAL AC-FT 1,400 1L123000 SANTA VN'l : RIVt R BI LOh GIBRALTAR DAM, WAR SANTA BARBARA, CALIF. - -CONTINUI D

( AY

] .2f .;i 73'- ,910 250 25 5S 15 .24 .Cl 60!. ,-7CO 10'J 28 5. 12 .18 . i 6 .17 .,1 i. 66' ,4CC 651 26 4: 8 8 .11 .-i

C1 3.50C ,3CC 7BC 12'- 45 9 8 .C8 C 2,5'.C ,?CC 5K 116 45 9 3 ,u7 K8 45 11 .CO 1'.'5 44 12 .' t : 1,2.- ,fi50 2RC .'3 1 o 1,10: ,cc: 260 1 C"? 44 1 J .06 11 1? J <>0' K3 730 9i 15 5 a .' (> .31 11 14 : 66L TiC 2"b 82 5.C 7 0 .ifc .12 1", C 9C - 6BC 19H 77 5.0 6 5 .< ; .12

It, : 95- 62C 19C 71 u 6 0 .T6 .12 17 5 .1.6 .12 75r 531. 180 62 4 5 t .ib .12 14 1.9 72C 495 173 58 2 5 J .C6 .12 4.5 68 11 46C 167 56 I 4 5 .''5 .12

7,"5C 64T 44C 16C 54 C, 4 5 .C5 .14 2,'lL 7C: 420 154 52 9 3 6 .04 .14 .'3 d&5 2,"v, ; 4CC 15: 50 8 88 .04 .12 54 .C4 .U 47 6 5C .C3 .-6

8.90C 5.0C-: 34C 135 46 8 47 .C? .- 6 <>,t,8c i,5c: 330 11: 45 8 44 .L3 .15 73 3.64C 2,7f 315 l?s 43 7 41 ,<-^ .'.4 29 42 6 39 .03 .v2 3 l,97C 29C IZr 40 16 33 .:? .-1 31

TOUL - ' : 2, '77 2,189 744 244 78.5 27.3 5.97 ,C7? C . " 26,60? 13, CT1 " 2.7CO 7BJ 128 55 15 .26 .13 4C 5.0 .28 .01 «C-FT 5.1

I AY UL AUG SFP

1 . 9. 5 ' C u 288 .16 .9C C 9. 5 0 t 156 .08 .71 J 9. 5

6 .5 i 0 2C5 .06 .5L C 9. 5 7 .32 : C 161 .04 .46 C 9. 5 ) 3 115 .06 .42 C 9. 3 .18 .77 127 .?8 .27 . 0 9. 2 H .? > 28 97 .12 .19 C 9. 2

11 .C3 51 102 .34 .15 r 9. 2 12 ."1 44 1C1 .C .12 ^ 9. 2 11 ' " 42 93 .3 .10 C 9. 2 14 T 36 94 .6 .09 " 9, 2 24 88 .1 .07 : 9. 2

16 .IB 16 68 .8 .04 0 9. 2 17 .11 11 79 .C .03 J 9. 2 18 'J .09 17 75 .6 315- C 9. 2 19 t. .1C 14 65 .4 434 5 9. 2 21. .11 7.9 61 .C 386 a 9. 2

21 .21 3. 57 .6 139 0 9. 2 22 .1 .24 2. 54 .1 .18 2.0 9. 2 23 2 ?4 0 .58 .6 57 .5 .C.5 7.8 4. 6 25 J .lu 5. 53 .7 .01 6.7 14

26 .12 6. 55 .9 0 9.5 C5 27 .09 5. 54 .7 0 9.5 0 za 1 .;& 696 42 .1 u 9.5 ~> 29 3 9.5 C .1 .05 41 .6 0 9.5 0 31

TOTAL 0 ..7 r 2.16 1,011.36 4.1C9 16 .24 1, 283.68 71.9 218.59 r f MEAJ C . ^2 : .070 36.2 133 .44 41.4 2.40 7.05 C , 0 .^ C .24 696 795 41 434 9.5 9.5 j ± MIN 0 1 39 .04 u J C ^ ^ AC-FT 0 .1 > 4.3 2,C12 8,150 324 2,55, U3 434 C

316, 40C VR 1970 TOTAL 6,667.00 MEAN 18.8 AC-FT 13,610 jf gage is "87.8 ft

Iv'tr yi 19666 Dec. 29, 1965 IS ,000 10.80 Lon S pcriocU 196, 7 Dec. 6, 1966 22 ,500 12.90 19618 Mar. R 1968 85 6.16 Jo . 1969i9 Jan. 25, 1969 67 ,500 18.88 Oct. 1 , 1968, to Jan. IS, 1!K)!1 ".84 19 o 1, 1970 4 ,020 Lont. period

P( J-asis of peak belo,. Gibraltar Dam plus tnbutar inflow, no fl jnths in each y

U4Y QCT MOV (VUG StP

6 791 34 70 9.8 1 4 564 '1319 66 9.5 5 503 62 9.3 5 35- I'1 60 9.2 J 1 344 42 57 1.1 ; 6 285 38 53 a. a 62 255 75 51 8.6 6: 226 46 49 fl.4 62 704 31 46 3.2 59 191 ?2 45 8.0 66 175 16 43 7.8 64 163 11 1 7.6 59 1S2 13 0 7.5 ?.l 53 146 :? 8 7.3 381 51 140 07 8 7.1 625 49 134 01 a 7.C 254 48 128 98 5 6.8 9« 45 125 92 4 6.6 49 41 119 8>i 4 6.5 13 43 113 88 33 6.4 127 41 113 8? 31 6.2 879 4- 1*14 Si 30 6.1 4,270 38 lv.1 78 30 6.0 1,19- 37 oj. 72 29 5.S 7~2 6.12 37 93 22 5.7 32fc 35 92 67 14 5.6 25^ 37 98 66 12 5.4 204 8,080 85 - 12 3.1 0 31 1,41" 2CJ 11

TOT4L 213.3 MEAN 315 459 237 1C 38.8 7.11 MAX 4,?7l. 8,087 1,040 83 70 10 PIN Ij 35 85 66 11 AC-FT ^ 29 987 23 S2 53 526 222 80 12 .2". 564 22 SI 51 422 365 78 12 1-r 42? 21 a; 49 412 628 75 12

U 935 398 72 U. 9 13 226 14 175 14 72 976 512 239 62 4.2 15 137 14 7L 484 t'j 63 3.6 16 131 14 68 556 458 75 59 3.9 17 9C 13 6t 512 328 7" 57 3.5 13 72 13 64 446 637 68 57 2.3 2J c iia 19 '..2 275 701 66 55 1.6

22 75 1,87.1 275 1,340 88 51 1.2 23 5? 25 26 <' 6! 9H4 7: 2^4 S5j 22 45 .7C 27 59 806 7C 191 810 19 43 3 & 26 58*- 68 782 13 29 Ti 453 175 764 10

TOTAL PAX 1C4 34 KIN 13

DAY HCT -|OV DEC JAN FEB MAR APR PAY JUN JUL 1 I 3.5 7.1 3.2 ia : 7 C- f . 9 3.5 6.5 3.2 41 0 3 3.2 5.5 2.9 30 0 .5 3.2 5. : 2.9 25 0 5 3.2 4.6 2.9 20 0 6 J 4.6 3.2 4.2 2.6 15 .20 7 t 4.7 2.9 3.8 14 13 .1C 8 3 4.6 2.9 3.8 70 12 0 U ~- 2.9 2.9 3.8 49 9.5 0

11 3.5 3.5 51 8.3 C 12 0 2.9 3.5 3.5 43 7.1 C 13 61 6.5 C " 3.2 59 6.5 0 15 '.! 3.2 3.2 3.8 51 5.5 0 16 2.9 3.5 45 5.0 17 2.3 2.9 11 37 3.8 0 19 C R.9 2.9 11 27 3.2 0 C 8.9 2.9 P. 3 18 3.2 0 21 5.9 7.1 2.9 7.1 16 2.9 3 22 7.1 6 . . 2.6 15 2.3 D 23 2.^ 5.5 2.3 5.5 10 2.C 0 24 .6C 5.0 2.3 5.0 7.1 1.4 C 25 .lr 4.6 2.3 4.6 6.0 1.0 26 ') 4.2 2.6 4.2 5.5 .70 C 27 " 4.2 6.5 4.2 5.0 .60 C 28 C 4.2 12 3.8 3.5 1.4 0 29 C 4.2 1C 3.5 2.3 1.0 0 9.1 4.2 7.7 2.3 0 0

TOTAL 3 24.80 154.1 121.4 159.4 668.6 259.80 .30 0 0 MEAN 0 .83 4.97 3.92 5.50 22.2 6.66 .010 0 0 MAX 'J 9.1 12 12 14 70 41 .20 0 0 MIN 0 '- 2.3 2.3 3.5 2.3 0 C C 0 AC-FT 0 0 mz'snu S\.\T\ 'ixi: RIVIR B 'LOW i us L \URILI-S CANYON, NIAR SANT^ YNF.Z, CALI .--CONTINUED

JUN JUL AUG StP

i 9K 2,730 31? 141 59 24 7.6 1.6

.1 : An.; 1,720 330 148 64 ?2 6.3 .4 771 1,515 633 142 22 5.8 .2

51 2.. 5.8 f 2 7 j 2,^90 l,35C 562 136 57 t; 5.6 ,2 ,1U 1,260 450 13: 57 19 5.6 f 3 ,47r 1,223 400 123 55 18 5.4 1. i ,27; 1,190 35C 115 55 18 5.2 t 3

11 : ,22" l.ICO 306 119 55 18 5.C 1? ,li: 819 302 115 48 18 4.6 13 : 12.. 284 283 111 40 16 4.2 14 791 8C3 258 Ij7 31 15 3.4 .2 1) 1,76. 761 252 K3 29 14 3.C

If- <- 1.58C 705 ?37 101 28 14 3.1 f 3 17 Id 12 4.4 .3 19 ,05" R~C 577 2C1 90 44 12 4.6 .8 2. 877 755 532 192 86 44 11 3.6 .7

21 I ,8r.j 742 582 179 82 42 11 2.4 .7 1C .9; .B 23 ,3CJ 3,73- 485 178 74 37 9.8 l.C .5 9.8 1.5 .2 25 3 ,701. ^.'JOO 4CC 158 74 33 9.4 1.3 .3

2-. L ,fl:i 5,78' 385 162 72 31 8.7 3.8 .1 27 ,OCC 3,83'. 365 157 74 1.7 3.8 .1 bPI 3,4fC 353 15C 72 B.7 4.; 21 e.7 4.2 J- 27 25 8.4 2.6

TCT»L ; t B ,417 75,106 28,081 8,523 3,168 1,293 456. C 128.41 5 40 ,755 2,682 906 284 I'j2 43.3 14.7 4.14 .B5 MAX i C 3 ,7'f 16,5Cr- 2.73C 861 148 69 24 7.6 2.4

4C-FT : f .16 2,570 904 255 lie

2.j 1.8 3.4 4. 7.3 2,110 35 5.3 1.4 .95 1.8 3.4 6.8 824 32 5.3 1.1 .91 1.8 3.4 6.8 378 30 4.9 .95 .22 .17 1.8 3.4 6.8 508 23 3.4 .63 l.B 2 . r 2 . .1 3.4 6.8 636 17 2.8 .15 2.3

1 . 11 6.8 1.4 6.3 349 12 2.8 l.C 2.0 L.I 12 3.4 5.8 246 11 2.6 1.6 2. J 1.8 7.9 3.7 5.3 212 11 ?.6 1.1 2.3 .95 2.8 I. 2.C 6.3 4.^ 25 1? 162 9.6 2.6 .67 3.1

.59 3.4 12 2.C 4.9 4.1 13 2.C 4.9 4.1 12 44 lt'5 7.9 3.4 1.2 3.4 14 I. 1 4.9 4.1 15 .49 4.9 4.1 11 37 68 7.9 3.1 .16 3.4

.16 3.4 17 .94 4.5 4.1 28 22 80 7.9 2.8 .01 3.4 IB 2.: 5.3 4.1 2C 19 69 7.3 129 C 3.4 3.4 20 2.C 4.5 4.1 13 19 55 7.3 394 C 3.4

(. 3.1 22 2.0 3.7 4.1 11 12 48 7.3 32 .13 3.1 23 ?.!, 3.7 4.1 11 11 46 6.3 12 .36 2.8 24 1.2 3.7 4.1 10 9.6 51 6.3 8.5 C 3.1 11 >1.5 44 5.8 5.8 t 3.4

26 2.3 1.4 4.1 2.6 9.. 818 40 4.9 3.4 C 2.C 29 2.C 3.4 4.1 0 .84 3C 1.8 3.4 4.1 7.9 32 5.3 2.6 0 .19 .02

2.41 J MX 2.3 12 4.9 28 318 2,110 35 402 1.6 3.4 H1N .49 l.fl 3.4 4.1 5.3 32 4.9 2.0 0 o r 0 148 C

UTR YH 197C TQTftL 1 ,591.27 HE&N 29.' AC-FT 21,010 11124500 SANTA CRUZ CRFF.K NEAR SANTA VNFZ, CALIF.

I1SP 1315-B.

story of changes prior to sept. 27, 1952. Sept. 2 7 , 1952, to Jur

UI.RACE DISCHARGE. --29 vears, 17.5 c fs (12,680 acre-ft per year) ; median of yearly mean dis harges, 7.0 cfs fS,100 acre-ft per year).

Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H. Nov. 16, 1963 2400 460 5.55 Jan. 22, 196" 1330 240 5.98 Jan. 21, 1969 0400 4,620 a!2.60 Nov. 24, 1965 0400 1,590 7.35 Jan. 24, 1967 1630 1,160 7.05 Jan. 25, 1969 0930 6,620 al4.16 Dec. 29, 1965 0"00 *2,030 7.80 Mar. 12, 1967 2100 840 6.75 Feb. 6, 1969 0300 2,850 all. 15 lan. 30, 1966 0500 110 4.25 \pr. 7, 1967 1100 210 5.89 Feb. 24, 1969 2400 *7,050 ab!4.45 leh. 6, 1966 1230 127 4.35 Apr. 11, 1967 0030 334 6.10 Apr. 21, 1967 2400 663 6.52 Jan. 16, 1970 1630 334 8.11 Dec. 3, 1966 0200 1,980 7.75 Mai. 1, 1970 1030 *910 10.32

d Present datum. h I'roin floodntark*.

Period of record: Maximum discharge, 7,050 cfs Feb. 24, 1969 fgage height, 14.45 ft, from fl oodmark, pres- 14.16 ft; no flo\i at times in 1953-70.

>> i eS ?4 B a.58.5 . ?.a . 0 2 . IBB 1 *> > 22 8 3.5 . 0 3 '166 3 ?i^?^ B R.5 ; . . 5 '. 144 *>b 2yP 7 8.5 . D > .122 -) ( 21 7 fl.5 . 0 1 3 88 6 fl-Z 9. ? H 55 6 R.2 9. ? 3 41 6 R.2 9.6 1 36 6 8.2 1 7 34 5 7.8

9.6 5 32 4 7.4 i. 4 2 l; 4 7.4 . 0 4 ?9 4 7.4 2 8 7R 4 6,8 . 0 1 6 26 3 6.7 . 0 1 => 26 2 5.8 . S 0 3 25 2 5.6 - 3 73 ? 5.8 9.6 3 23 2 6.2 9.6 2 23 1 6.7

l.k 1 2? D 5.8 . J. 7 1 21 0 5.6 8.8 i 21 0 5.2 8.8 13 21 C 5.0 9.2 9 2". 3 4.7 9.2 9 2C 9.6 4.7 8.R 3 2C 9.2 4.7 9.2 R 18 9.2 4.7 894)4 8 9.2 5.0 3066 j 8 ,8 4.7 1655 ! 8.5

8.6 1.2 4 789 399.5 198.0 8 19.8 .60 >4.1 39 0 2R.2 12.9 6.60 2 > .6 .019 894 1 8 08 18 R.5 2. .10 8 1R 8.5 4.7 .10 IV 2,4

«TK YR 1966 SANTA "1NLZ RIVER BASIN

11124500 SWTA CRUZ CREEK NE \R S \NT \ V\T:Z, C U IF. - - CONT I\UI I)

1.2 6.3 .5C

17 33 12 16 73 78 75 30 9.C. 2.6 l.-J IS 31 11 If 57 161 75 i: 9.0 2.4 l.u 1" 3

21 -26 10 16 39 '77 65 26 7.6 2.1 1.3

23 25 39 16 3b 235 60 ?5 6.4 l.ti 1.3

25 24 174 16 3) 220 60 24 b.9 I.') l.i

26 J 24 b4 16 33 220 !>7 24 5.9 l.-j 1.3

2B 0 22 57 16 33 J13 52 23 -5.9 1.7 1.2 29 f- 22 46 33 17C 52 I* 5.9 1.7 1.3 3(. C 22 43 31 155 50 13 5.9 1.7 1.5

PEAN C .28 2C5 42.9 21.4 54.4 u:- 90.7 31.8 l'...7 3.39 i.n

WIN i: 1ft 13 42 50 18 5.9 1.7 1 .C

24.9 AC-FT

DISCHM«r,F, IN CUBIC FE?F PFR SCCONO, WATER YEAR GCTOBEK 1967 TC StPTEMRLR

CAY

I .5 .4,-. 13 5.9 .7 6.4 9.x .4 .'JO 2 .5 .30 7.6 5.9 .3 6.4 IP .4 .6.: 3 .3 .30 6.4 5.9 .6 5.9 12 .4 .6, 4 .3 .40 5.9 5.9 5.4 U .4 .60 > .3 .5C 5.9 5.9 .C 5.4 1C .4 .60

.3 .f-C 6.4 5.9 .9 5.4 11 .4 .60 7 .3 .6C 6.4 5.9 .9 32 9.3 .9 .60 a .3 .6'. 7. : 5.4 .9 .275 9.j .C .60 9 .3 ,6C 6.4 5.4 .9 4B H.3 .I/ .60 ! ' .3 .60 5.9 6.4 .4 25 7.6 . J .50

11 .?. .60 5.9 16 .4 16 7.6 . n .30 12 .C .60 5.4 U .4 13 7.6 .*? .30 13 .90 .6C 5.4 9.'0 .4 16 7.6 . ' .2C 14 .9C .6C 4.9 8.3 .9 15 7.6 .6 .20 15 .9C .6L 4.9 7.6 .4 12 7.6 .6 .20

16 .90 .6C 4.9 7. ft .4 11 7.6 .3 .20 17 -9f; .60 4.9 7.0 2 12 7.6 .0 .20 la .70 .80 6.4 7.0 2 11 7.6 .6 .2C 19 .90 4.4 12 6.4 1 10 7.6 .4 .20 2? .90 12 9.7 6.4 1 10 7.6 .4 .21

21 .90 15 8.3 6.4 I 9.7 7.6 .1 .20 22 .90 16 7.6 5.9 .7 9.7 7.6 .1 .20 23 .1 .20 24 .1 .20 25

26 27 .83 4.,, 5.9 3.3 7.0 3. 5.9 .2 .20 23 29 .61 4.:- 5.9 7.0 7.C 8. 5.4 .90 .20 3J .65 9.C 5.9 7.3 7. 5.4 .90 .10 31 ,6J 5.9 9.. 7. .90

.90 «EAN I. 01 3.39 6.67 7. 1C 8.73 20.6 8.15 3.21 .34 .029 I*AX 1.5 16 13 16 28 275 18 5.4 .93 .10 MIN .60 .3C 4.9 5.4 5.4 5.4 5.4 .90 .1C o 2Si> 213 »0 5« 21 2 0 0 ,' 4 0 2 f ? .1'. I* 1! 19? 71 57 ?0 1 a 2.6 162 If? 72 <6 ?(> 0 J 5,3 rt 0 0 1 7 S 7(1 SS 20 9.C, u

1,7 510 1 <5 9 66 5'J 19 S.9 4 2.1 27H ISO 6S 55 19 H,2 3 694 2'JO 1'IS 65 3? 19 7,

2.2SO 2Si) 1t>? Sh 51 19 7,7 i 33S 500 ISa S6 51 18 7.5 5 Hd <3 0 ij 1 U 1 SS 50 1« 6,9 i, 742 S , 0 0 0 159 SI 50 111 7.S 3 'J.S10 »,9i)n MJ S3 2" 1« 7.S 5

2 1.1 2.0 3.6 S.9 0,2. 1 HI 6 7.(, 2.6 .17

., \,1 ?.» 3.6 S.9 h,2 1 07 S 7!" ?!

h 2,1 10 J.ll S.9 s.H 68 4 6.r 2.0 . 5S 7 2,1 10 4,0 S.il S.B SO 4 h . 7 2.0 ,53 ^ 2,1 fl,1 4,9 S,'4 SS ij'' a fc.6 2.0 .33 9 2,'l 7^? B.I 1)7 7^9 4J 4 6.? .1 .35 1 0 2,1 6.5 B.<4 ?6 20 39 U 6.0 .9 .53

, 2.1 S.« b.9 |1 16 3S 5 S.9 .9 .31 ? 2.1 S.I S.9 15 12 31 3 S.7 .1 .53 5 2.1 (l.o s,J «,3 12 2» ? S.S .« .31 y S , 0 S.I <1.9 6 . /j 12 27 5 S, 1 .6 ,31 S 2.1 S.5 n,9 10 9,(1 26 3 'J.6 .6 .31

6 2,7 S,1 4,9 114 fl.S ?S 3 4.3 .6 .30 7 5,7 4,9 J .4 Bl fl .O 2* 3 4,0 ,6 ,30 ft 5.0 1.7 O..J 1» 7^3 22 3 3.9 .5 .29 9 5.7 4.7 S.I 11 7.1 21 1 1." .? .29 0 3.S 4,7 S.9 9,7 a. 9 20 i 1.1 .1 .as

, 3,5 4,2 S.9 ".3 6.6 21 1 a.l I .0 ,21 2 3,1 4,2 6,4 H.3 6,S 21 1 u.o .82 .23 3 3.2 1.? 5,9 c. 5 6,5 20 1 3,7 .77 .2" q 5.6 1.1 S.9 n,5 (,,1 19 0 3.7 ,73 ,19 S 5,* 1,1 0,0 7,6 S,9 19 9,4 3,7 ,69 . 17

f, 3,S 4.0 7.0 7.0 5,9 1H 9.2 1.1 .5-) ,1S 7 3.8 3.6 6.4 7.0 o.O |« 9.4 1.3 ,S9 .10 fl 5.7 3.6 6.4 7.0 SO 17 9,7 0,0 .SB . .OS 9 3.2 3.6 7,0 7.0 - 17 9.S 3,8 .59 .04 0 9,4 3.6 .17 ,01 . J.5 . 0

AN 2.76 5,00 S,3S 15.9 9,S» 47,1 2.1 S.10 1.50 ,J6 * S.B 14 7.0 110 SO 292 16 e,t 2,9 ,17 N 1,9 ?.P 5.6 5.4 s,i 16 9,2 3.3 ."7 0

1970 1'IIAL 3,ISO.70 \ r Date Lontc nt< Llcvation Date '(i Mai . 2b-28 , HUib 192 , 5b4 745.93 Nov. 13, 1965 11 7 ,8 7 2 716.63 v :ar. 13, 1'JCT 2(i6, 894 730.65 Dec. 2, 1966 165,149 736.18 '8 Out. 1, 19(j" 191. 5b4 745.59 Sept. 30, '1968 160,871 734.57 >;> l-ub. 24, 1LU>U 221, 100 "55.11 Jan. 17, 1969 155,700 732.59 U Mar. 31, \nr. 2, 3, 19"0 204, 800 749.96 Sept. 30, 1970 1~6,400 740.36

initial filling in April 1958, 11-.8': )65 (elevation, 716.63 ft) .

ItLM \RkS.--Rc DATE ELEVATION CONTENTS CHANGE TOTAL (FEETI ACRE-FEET) IN CONTENTS D IVERSI 3NS (ACRE-FEET! ( ACRE-F EETI OCT. 31i 1965...... 119,193 -3,115 2 ,280 NOV. 1 ,091 DEC. 52 496 CAL VR +28,077 17 ,858 JAN. 31, 558 FEB. 22 190 ,475 +7,580 320 MAR. 91 192 ,505 +2,030 905 APR. 30. 79 189 ,216 -3,289 1 ,984 WAV 78 186 ,282 1 ,640 JUNE 31 182 ,068 2 ,439 JULY 59 177 ,217 -4,851 3 ,078 AUG. 93 172 612 -4,605 2 ,707 SEPT. 58 168 ,926 2 ,487 WTR YR +46,618 19 ,985

OCT. 48 165 ,955 -2,971 1 ,861 NOV. 20 165 ,203 890 DEC. 91 204 ,598 +39,395 595 CAL YR +38,535 19 ,464

JAN. 31, 22 205 ,558 +960 605 FEB. 20 205 ,496 440 MAR. 27 205 ,714 +218 522 APR. 25 205 ,652 -62 422 WAV 22 205 ,558 -94 1 ,450 JUNE in...... 50. 07 205 ,092 -466 2 ,112 JULY 54 200 ,398 2 ,643 AUG. 82 195 ,210 -5,188 3 ,150 SEPT. 61 191 ,622 -3,588 2 ,286

WTR YR +22,696 16 ,976 OCT. 65 188 ,809 1 ,547 NOV. 21 187 ,529 -1,280 1 ,482 05 187 ,062 -467 344 CAL YR -17,536 17 ,003 JAU. 31, 86 186 ,513 -549 319 FEB. 84 186 ,455 -58 360 MAR. 33 187 ,877 +1,422 860 APR. 63 185 ,850 -2,027 1 ,182 MAY 03 181 ,270 -4,580 2 ,891 JUNE 30...... 740. 17 176 ,044 -5,226 3 ,248 JULY 18 170 ,558 3 ,545 AUG. 22 165 ,257 -5,301 3 ,546 SEPT. 57 160 ,871 -4,386 2 ,902

l/TR YR -30,751 22 ,226 OCT. 76 158 ,700 1 ,340 NOV...... 733. 19 157 ,300 -1,400 635 DEC. -1,200 603 CAL YR - -30,991 21 ,430 JAN. 31, 18 476 FEB. 28...... 748. 31 199 ,700 -5,700 562 MAR. -2,800 570 APR. 30. +7,800 703 MAY 20 205 ,500 + 800 1 ,550 JUNE 98 204 ,800 -700 2 ,260 JULY 31...... 748. 22 199 ,400 -5,400 3 ,310 AUG. -5,500 3 ,430 SEPT. 30. -3,700 2 ,420 WTR YR +29,300 17 ,860 OCT. 04 187 ,000 -3,200 1 ,990 NOV. 57 185 ,700 936 DEC. 28 184 ,800 -900 736 CAL YR +28,700 18 ,940

JAN. 31, 54 185 ,600 +800 851 FEB. 70 189 ,000 +3,400 445 MAR. 9 204 ,800 +15,800 793 APR. 8 201 ,500 -3,300 2 ,000 MAY 9 198 ,500 -3,000 3 ,370 JUNE 3 193 ,800 -4,700 2 ,870 JULY 3 188 ,100 -5,700 3 ,840 AUG. 2 181 ,900 -6,200 4 ,190 SEPT. 3 176 ,400 -5,500 3 ,880

WTR YR 1970...... -13,800 25 ,900 NOTE. ELEVATION AT 0845 HOURS FOR WATER YEARS 1966-68; AT 2400 HOURS FOR WATER YEARS 1969-70. Wtr yr 1966 1967 1968 1969 1970

REMARKS.- - Re

11122000, 11125500).

1 '5 . 6 ' .5 1.5 . Jvl ; J 7.4 3. J >j '.5 .51 .7 1.1 .31 C : l 1.6 1 . j 1 4.4 .4 . »"> .2J , '3 1.6 1. 4 V 5.5 .4' . 7 . 5 > .71 : .: t 6 1 . ; i 5.9 .37 .j .40 .23 4.5 0 4.2 1.

6 'i 6.5 . 3 . .s 1.6 .2C 3.2 ') 4.4 1. 7 1 6.5 .3' .6 1.1 .20 IL 3 4.7 2. 1 : 4.7 .3 1 .4 .aC .2'. 35 0 2. 4.4 3. 9 1.9 .2' .4 .43 .20 33 3 3. 4.7 7. I. i. 1.2 .2 .4 .4C .2C 4B 1 3. 4.4 7r

1.1 .2" .2 .4; .20 37 . 2i 4. 4.4 6. ? C .So .2- . " .* - .2J 37 4.4 4. 4.2 7. 5 : . rr> .2 .5 .4 .21 37 5., 5. 4.7 7. 4 0 1 . . .2" .-1 .4? .21 33 5.6 4. 4.j 7. 5 , I.? .2 ,(j .' ; ,2C 7^ 6.2 5. 4.0 5.

6 3 36 .2) .0 .43 .2: 2^ 6.1 8. 3.5 2. 7 1.9 2H .2 .5 .4' .7i 21 8.8 a. 3.2 1. 1 !.-> 17 .2' .3 2.3 .2: 71 8.8 9. ?.e* . 9 .1? 6. a .25 .1 l.l .20 21 8.1 6. 3.0 ; ! 2.6 .2 1 .1 .4j .25 21 9.2 8. ?.6 :

i : 2.9 .2' .} .2.) .2'. 22 9.2 -1 2.7 T ? Jl p p . ? ^ .3 . " c 13 9.6 : ? . - J : 74 .2 ' .3 .2J ' .6'. ? I 4 ? 23 .2-' .3 .2C .2'- 2 1 i.a : 5 . 8. .2. .1 .30 .2: 3 1 2.4

6 : 4.7 .2: .1 .30 .211 2 11 3.5 ? 7 1 t.b .2 .1 . .3. .2: 2 7. > 3.5 ? R : 1.1 .2 . .? .3~ .2*, 2 2. . 3.7 3 ) 0 1.2 54 . 2 2. > 3.7 C f I.' 2C ., o 8.8 2. , 4.03.7 C:

X 1.9 36 54 .5 2.3 .30 83 13 1 4.7 7. ."J " . 2 '_ .7i C ^ C C 1.6 .-Ft 6.4 447 1«1

R VR 1966 TOTAL 1,41.9... MEAN 3. >6 MAX 83 WIN 0 AC-FT 7,790 1 .3 j9 436 76 15S 78^ 76 'b 16 l.J

?.4 4.7 53 ? . 71 426 291 8C 27 5 4 . . 4 . 53 ?P. 66 513 753 t3 4/ 4 5.6 4.2 7] 55 19" k,3 B29 773 76 41 4 5.3

I «.<< 97 43 IP.' 56 511 40, 8'_ 43 2 5.6 5.S 1 43 164 56 6C'4 353 t9 48 '. 5. )

1 6.8 1 / 4i 15- 58 6^,4 5oV 61 43 8.0 5.6

5.9 72 43 n* 72 1,3C: 5?t 57 45 0.4 4.4 1? 5.6 44 43 54 44 8..

14 3.7 198 0 1.8 1'3 37 lib 851 7*5 195 45 4v O..K

17 .6J B4 36 11? I "5 61S> 12d 43 37 ti.t .6. 73 36 11' 671, 723 121 42 36 8." ^ .7 67 It, 11' 572 1,'~7" 125 42 35 6.4 3 1.1 67 36 I- 1 429 1,17"' 125 42 37 7.6

21 2 ' l.B 75 !V3 104 2S5 1,730 67 23 1.9 82 1,33" lii? 282 1,61' 6B 37 9.2 6.6

25 ?.- 83 ?,21 V? ?3C 1,12; 69 j5 31 6.2

2~, 2.'! 60 56". 29 29 4.U 5.9 <""> 76 ?55 I.S5C 74 1.5 69 476 8.5 3. .6. 67 464 27 29 1.9 5.9

TOTAL : 94.1, 2, 111. 7' 13,4?5

y»X 6.5 f I\ .3 16 76 56 359 bl 27 9.2 1.9

WAX 2 1 MIN AC-FT 6.54.'

(lliCH'WGE, IN CUBIC FCCT PEP. SECONP, HATFK YEAR OCTME* 1967 TO SfPTE"B6R 196H

.AY HCT NOV DEC JL AUG SFP

1 6 . ? '- 1 2 5.7 14 4 4? 9 b.9 J ; 7.1 4.4 1. 4 14 4 19 9 8.9 4 0 7.4 3 1 ^ 5 14 i, 7. 19 I 4 1 8. . 4 9.3 5 14 6 6. 2964 1 S.u 3 1 '. 5.9 6 14 B 5. 99 1, 4 I 8.5

6 5.9 6 14 6 7. 17 7 14 5.8 o.C r 5.9 6 14 7 5. 62 7 14 5.5 7.1 * 5.9 2 14 7.4 li 2 7 14 5.4 B." 7 5.9 5.4 14 2.8 IV 277 4 5.5 6.7 lj 5.9 4.4 14 l.S 2" 267 4 5.5 2.5

11 5.6 4.2 14 2.4 25 3 S.3 7 .1 5.7 1.9 12 > - ».8 J.8 17 4.C 4" 3 9.3 6 8 5.6 1.9 13 C 3.4 3.8 21 6. a 76 2 9.3 7 1 6.C 1.8 14 3.6 3.B 17 3.2 9? 7.1 9.3 7 4 6.2 1.7 15 3.6 4.7 11 1.3 23 6.5 9.7 3 1 6.0 1.9

16 : 3.6 * 1 2.4 16 6.2 9.7 12 5.8 2.;- 17 ?.3 i 4.0 1 12 4.4 31 5.9 C 12 5.3 1.6 18 5.6 ' 4.C 1 1' 4.6 31 5.9 3 12 4.8 1.3 19 6.2 1 ?.4 1 l'i 4.6 31 6.2 3 12 4.4 1.? <"- 6.2 ! 1.2 I 7.1 4.9 31 7.7 3 12 1.2 1.4

,71 6.2 \~ .1. 1 6.5 4.9 31 13 3 12 .C5 2..- 2? 5.9 i? ; 2 6.2 6.3 2." 14 3 12 0 2. 23 5.4 2 3 5.9 4.6 6. 5 14 4 12 0 1.9 24 2 : 4 5.6 4.9 5. 4 14 4 12 0 .84 25 ? 1.5 3 5.6 4.9 4. 9 14 2 12 " .12

26 2 8.1 3 6.8 5.9 4. 9 14 9.7 12 r 27 2 B.I 4 1-, 9.7 4. 9 I? 9.7 12 3.C C ?8 r 1 0.5 4 11 22 4. 9 9.3 8.9 13 5.2 0 29 7 1 8.5 4 14 39 9. i 12 8.9 13 6.C ", 3. 2 8.5 4 4C 19 9.3 a. 5 11 6.4 0 31 ; 13 4 5

TOTAL 4H.4 116 168. 2P 3 9.8 340.7 358.8 653. 6 378.4 362.1 351 3 158.15 95. C6 WEAN fAX 6.2 12 13 16 21 54 9 ? 19 17 * 11 8.C MIN 3.8 5.6 l.B 4. 9 5.9 6.5 6 a ', : AC-FT 96 23^ 334 7 314 189 S \\1A IN!,: RIVLR BASIN

1 1.6 : i,' : 5.54C 31 e.: 2(1 31 16 .1 .' 1.7 1.6 ; 1,4?.. 5,520 61 21 77 34 16 3 ;.4 16

.41 .44 . 1,:R3 334 153 185 26 26

6 1.1 .3. .41 ; r,3i: 21 942 8f 26 53 27 .? 7 2.i- .,5 .33 2,19f 77 ) .?' .2? " ;-, >; :

f .11 .14 , l,4r>0 21 1,C5' 23 26 4.' 22 ..* .12 - I,'".' ?l t?5 .6 .C* , 1,2" 167 75 ..5 .C5 - 1,55 947 20 23 . 26 37 22

.C3 l,f.;i 947 11 23 76 36 2? 1. 7 1,17 91 ; 13 J6 1 36 22 ' .1,17-; ,(1C 17 79 .<~ 36 22 ,7:,C 16 75 .? 36 2<- )o3 ,7 JO 15 75 ..5 36 6. ;

j HZ 11 ,7f; 14 75 .* 36 i." i.ii'i ,7CJ 14 75 .3 36 i.. 3 4,' 4. ,7^.; u 75 .2 36 i. .

"*,9'". 11,1 . ,7-0 11 43 .1 35 2.5

.?7 2 ,9. t',-^ 1,700 l 43 .0 2: 3. - '* 7 .K6 f,6J, 7, f,.? 299 1 43 ,G 1C 3. 1.1 - 3,62 ^,i4'~ 21 9.9 43 ? ).u 3.

^ *

X 1.1 .>.< 1.6 1:1,9';. il,l .1 5,54.. 1,15,: 185 37 63 27 7. 8.J 4.; 9.C 1.. -"T 12 if 14 15', <. '.. ?? ,5. U2.69U 15.63J 5,610 1.12C 2.2GJ 93"i Ib

:R 197-

JUN JUL

1.7 17 14 2.2 16 7.4 L.7 6. 4.7 2.2 16 6.5 2.4 6. 1 1.7 2.2 16 5.8 3 '.. 6. 7.5 2.2 16 5.8 3 5.5 6. 5.4 T.I. 16 5.8

h.!> 6. j i 2.6 13 18 5.7 6. 6. 1 2.2 ?5 22 6.7 5.1 6. .71 ?.? 25 23 9.C '..9 5. 1.4 2.1 27 23 3 6.6 1. .5 ' 2.( 51 22 3

H.6 3 .'1 .7." ?.C 65 16 2 9.2 9 .18 . .id 2.1 55 11 2 9.3 1 2.9 . :4 2.. 75 ir 3 V.3 jf. 1.1 . 3 2.? 22 9.7 4 9 9.4 1 3. . ,1 2.3 21 9.7 1

9 9.5 1 3.5 .1 ?.5 1C 5.4 1.5 2.4 .71 4 3.1 j 2.5 <,.: 13 .51 2.4 1.3 9 2 l.i : 2.7 4.C 29 .22 2.6 1.5 4 1 0 .^3 J 2.5 3.C 29 .08 2.3 .53; .23 5 66 7. a 3: .Cl 7.8

3 : .13 : 3.7 2.« 30 0 3.4 3 t' .11 ., 1 3.2 7.H 30 .27 4.2 3 ; .'4 .3 3.7 5.'.' 29 5.3 3.8 J 0 .2 .1 3.1 K. r 27 6.1, 3.0 3 0 .13 .7 2.9 U 24 5.9

3 ..'.3 .2 3.0 2 24 5.9 3 : .:i .3 2.9 3 23 6.C 29 4 : . 1 .8 2.5 4 22 6.1 6 4 C : 2.3 5 22 4.8 1 4 -> i 2.2 6 22 .77 T 9.3 1 o

1EAN 1.T9 9.4 2.01 .61 .92 5.24 15.9 20.1 6.12 3.18 1.6R .38 PAX 1.8 1 12 3.5 7.8 66 65 30 14 11 5.6 2.1 MIN : i. 1.7 2.2 5.4 0 J 3 C AC-FT 67 56 12« 38 51 322 to Oct. 1, 1955, at datum

nd, gage height

">o3 0200 *93S 3.5' \rr. t, 196" 17 30 391 -:.S2 Feb. b, 969 0200 508 3 H>5 1100 hlS 3.19 \rr. 11, 196" 02 30 ISil 2. i3 1-eh. 15, 9b9 1900 109 2 Apr. 18, 19b" 10 30 _" : 2,"5 tcb. 24, 969 1930 *7,300 6 (ib 0130 InO 3. i: Feb. 28, 969 1530 454 3 Oh 1500 *4,2(H> 5.35 Mar. 8, 1%S 09 00 *88 2. 76 \pr. 5, 9b9 1730 "1 : 07 1430 ;li : 3. 30 0? 1930 101) 2.10 Jan. 21, 1969 06 00 3.900 6.56 Mar. 1, 1970 1030 *705 3 :.00 Tan. 26, 1969 1000 5^630 5. "4 Mar. 4, 19"0 2030 169 2 lor Ions periods i n eacli vear. od of record: Maxi d aho\e : ,300 el's ; no £!OK at times in most vc ars. (ecorJ, fair. I loi>

19.

'UK 195' Tli S^Tt-Mf

"\Y Jl \

5.1 .6.

11 .6 . i: 12 p > IS . i : Q B 11 4 V .5 .r 1* >" 2 7. .6 .1 1' . j 7 . .9 .2 .

Id t. .» .11 17 ; . S ft. . ^ .1'' *! x .5 4 .1 .]" ^ . ; . ; 7

,'f. 1. . . 8 1 ^ .qr <> 7 . 1 > .6 1.1 .d«. ? °. .} H.T ' .70 31 r .2 7.5 .v. TiITflL . ' 1,175. i' 114.7- 15 ,B 65". 5 9 >.30 3. SO «l\l! i . 17

31

TOTAL

CAX tC-FT

CAL YR 2. 7 2.5 2.3

13 1' 16 4.2 2.1 .2 .3 1) 14 1- 1 1 4.? l.i .1 .34 15 21 12 3.o 2.1 .34

16 J.7 11 3.4 7.5 I." .2« 17 7.5 If 7.6 2.5 ."<) .2? I H ^,'. 4.7 3.' 2.5 . ? .16 1 J 143 17 4.3 ^. 2.5 . 2 .12 J ' 14 Ifl 4.3 ^.7 2.5 . 2 .1C

/, 776 36 14 ?.l 2.7 . ? .33 2? . -4 7"1 155 5,- 12 2.7 2.7 . o <.o 321 1. 3. f> 2.5 . (. . ' i 24 '55 1,76: 1. 3.1 2.5 .65 .ri ' 1,71' 3;s 1.7 ».4 7.3 .65 > 26 lil': l")i 9.7 3.2 2.2 .55 L 27 K3 134 I-' 3." 2.1 .46 ^ 2k 77 IIP 1" 2.3 ?.l .46 " 1 3, lt 2.h 2.J .46 ?C i: 7.C l.V .47 j u r 1.1

TUT4I 4,464.6 3, (135.2 771.7 197. -' 69. P 33.6" 7.13 "FAN w l,7e>C 1,76 4C 7.6 2.8 1.1 .46 v I N 7.5 ).3 2.1 1.6 .42 ; AU-f-T »,ft(.j 7,-,l'- 1,530 391 137 67 14

JTk YR H6"» TOTAL t, !7n .31 «r A\ 25.7 MAX 1,76^ "IN .' AC-FT 13,60"

1^6.75 fc.35 167

AC-FT 39C

CAL YR 1969 TOTAL '!,37t!.31 ^'.E^N >5.7 KIN j SANTA YNEZ RIVER BASIN

11128400 ALISAL CREEK NEAR SOLVANG, CALIF. LOCATION.--Lat

DRAINAGE AREA.--12.3 sq mi (revised). PERIOD OF RECORD.--October 1954 to September 1955, October 1955 to September 1956 (monthly discharge only), pub­ lished in WSP 1928, October 1956 to September 1970. GAGE.--Water-stage recorder. Datum of gage is 378.73 ft (revised) above mean sea level. Prior to Dec. 25, 1955, at site 50 ft upstream at different datum (destroyed by flood). Oct. 1, 1956, to Jan. 23, 1961, at datum 1.0 ft higher. AVERAGE DISCHARGE.--16 years, 6-.S3 cfs (4,730 acre-ft per year); median of yearly mean discharges, 2.0 cfs (1,400 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Anm 6-70 Date Disch. G.H. Dat Disch. G.H. Date Time Disch. G.H. Nov. 16, 1965 1430 *2,140 7.15 Jan 24, 1967 1130 *4,280 10.50 Jan. 25 1969 0500 *4,960 8.50 Nov. 23, 1965 2300 1,390 6.25 ' Mar 12, 1967 1600 118 3.15 Feb. 5 1969 2400 2,300 5.07 Dec. 29, 1965 0330 1,700 6.65 Apr 4, 1967 1530 172 3.40 Feb. 15 1969 1100 1,080 3.85 Jan. 30, 1966 0030 1,200 6.20 Apr . 18, 1967 0830 128 3.20 Feb. 24 1969 1800 4,700 7.13 Feb. 28 1969 1130 926 3.82 Dec. 3, 1966 0100 101 3.96 Mar 13, 1968 '0700 *30 2.67 Apr. 5 1969 1430 1,230 4.15 Dec. 6, 1966 1500 292 5.08 Jan. 22, 1967 0400 710 6.30 Jan 21, 1969 0300 1,920 5.75 Mar. 4 , 1970 1730 *199 2.90 No fl ow for long periods i n each year. Pe led a sis of slop e-conveyan t of peak flow; m 1X imum gag e height , 10.50 ft Jan. 24, 1967; no flow for s year, those ter y ear 1969, wh regulati tion. At times, waste irrigation water pump ed from Sant i Ynez Riv s minor flow.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

NOV DEC JAN FE8 MAR APR MAY JUN JUL AUG 15 53 30 5.8 .90 12 42 25 7.1 .80 c 12 36 2? 5.8 .70 0 11 32 19 5.8 .60 " n 27 19 5.5 .50 0 9.9 25 31 5.2 .50 c 8.7 ?2 24 5.0 .50 J 8.4 21 21 4.7 .50 J 9.4 19. 18 4.7 .70 r- 9.9 17 17 4.4 .60 c 9.9 16 16 4.1 .50 0 12 15 15 3.8 .50 c 10 13 14 3.8 .50 V 9.9 12 13 3.8 .40 1.8 9.4 12 12 3.8 .40 415 9.0 11 12 3.8 .40 301 8. 10 11 3.8 .40 153 8. 9.4 10 3.8 .30 48 8. 9.9 9.9 3. A .30 24 8. 9.0 9.0 3.6 .30 12 8. 8.C 8.7 3.3 .30 74 8. 8.0 8.4 3.3 .20 216 8. 7.7 8.0 3.3 .20 261 8. 7.1 7.7 3.1 .30 85 8. 6.4 7.4 2.9 .20 43 8.7 6.8 7.4 2.7 .20 32 8.4 8.4 7.1 2.5 .20 26 37 6.1 6.4 2.5 0 .20 22 659 31 2.5 0 .20 17 116 199 2.5 .80 .10 31 71 39

TOTAL 1,730.8 K142.8 738.8 4C9.0 122.8 54.00 12.50 0 MEAN 57.7 36.9 23.8 14.6 3.96 1.80 .40 0 MAX 415 659 199 31 7.1 2.7 .90 0 MIN C 8.4 6.1 6.4 £.3 .80 .10 0 AC-FT 3,430 2,270 1,470 811 244 107 25 c SANTA YNEZ RIVER BASIN

11128400 ALISAL CREEK NEAR SOLVANG, CALIF.--CONTINUED

DISCHARGE, IM CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 SEP i a .40 13 3.1 17 15 1.0 .30 2 .8 .40 12 2.9 19 13 1.0 .30 3 1 .40 11 2.9 12 13 1.0 .20 4 .40 .4 3.1 50 12 1.0 .10 5 .8 .40 .0 2.7 38 11 .90 .10 6 8 .40 .0 2.5 27 11 .80 0 7 2 .40 .7 2.5 34 1 .70 0 it .4 .40 .1 2.5 26 .9 .70 0 9 .0 .40 .8 2.3 22 .4 .70 0 1J .3 .30 .1 2.3 22 .0 .70 0 11 .5 .30 .8 9.2 43 .7 .70 0 12 .9 .3C .2 46 39 .4 .70 0 13 .6 .30 .2 33 25 .0 .70 0 14 .6 .30 .7 29 21 .7 .70 0 15 .3 .30 .4 19 19 .4 .70 0 16 .0 .30 .1 19 17 .1 .70 0 17 .0 .30 .8 17 16 .8 .60 0 18 .90 .30 .8 17 46 .4 .60 0 19 .80 .30 .6 15 32 . 1 .60 0 20 .60 .30 .3 11 28 .8 .60 0 21 .70 .90 .3 9.9 37 . 5 .60 0 22 .70 200 .1 9.4 43 .2 .60 0 23 .63 36 .9 8.7 34 .0 .60 C ?4 .60 915 .7 8.0 31 .7 .60 0 25 .6C 15C .0 7.4 26 .7 .60 0 26 .50 59 .1 7.1 2* .4 .60 0 27 .50 39 .3 6.4 22 .1 .60 0 28 .40 27 .1 6.1 19 .8 .50 0 29 .4C 17 .6 .40 0 30 .40 19 5.2 16 .3 .40 0 31 >v> 17 12 .40 0 TOTAL 3 C 168.50 0 MEAN 0 C 5.44 48.2 5.77 IB. 6 27.1 7.52 2 3 .68 .032 0 WAX 0 0 87 915 13 46 50 15 1.0 .30 0 MIN 000 .30 2.7 2.3 12 3.1 .40 0 0 0

3.0 2.7 1.4 1.2 1.1

8.0 1.3 .30

.50 .50 .40 .40 .40 1.8 1.8 1.4 1.3 .40 1.2 .40

1.2 1.2 1.2

TOTAL 0 0 0 0 0 46.80 19.50 MEAN 00300 1.51 .65 MAX 0 0 0 C 0 11 3.0 MIN 0 0 0 0 0 0 .10 AC-FT 0 0 C 0 0 93 39

CAL VR 1967 TOTAL 3.111.80 MEAN 6.53 MAX 915 MIN 0 AC-FT 6,170 SANTA YNEZ RIVER BASIN

11128400 ALISAL CREEK NEAR SOLVANG, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET

DAY

1 39 120 8.''t .a .55 2 0 34 83 9. 1 .6 . .55 3 c 31 64 11 .5 . .55 4 c 3C 52 8. ) .4 . .55 5 D 190 43 201 .2 .55

6 r 277 38 47 .0 . .55 7 0 71 32 28 .8 . .45 B o 51 29 22 .6 . .35 9 0 40 26 20 .6 .8 .35 1C c 31 25 17 .5 .8 .26

11 c 28 21 15 .4 .B .18 12 3 27 20 14 .3 .8 .11 13 0 26 19 13 .2 .8 .11 14 0 20 17 12 .1 .8 .05 15 0 202 16 11 .0 .6 0

16 s 67 15 10 .9 .5 C 17 0 46 14 9. .8 .5 C 18 0 47 14 8. .7 .4 0 19 458 44 13 8. .6 .4 0 20 236 35 13 7. .5 .2 0

21 545 56 16 7. .5 .2 0 22 58 51 14 6. a ^ .2 0 23 19 748 13 6. .3 .2 D 24 175 978 12 6. .3 .C 0 25 2,043 467 11 6. , 2 .88 0

26 785 176 11 5. .2 .77 0 27 29t 96 10 5. 4 1 .66 0 28 99 251 9.7 5. .1 .66 0 29 64 9.3 5, . 1 .66 0 30 51 8.8 5-. .0 .55 0 31 «3 8.8 .0 0

TOTAL 000 4,834 ,4,159 797.6 541. 9 .7 4 >.48 5 .16 0 0 MEAN 000 156 149 25.7 18. 3 05 L.45 .17 0 0 MAX 000 2,040 978 120 20 .8 2.0 .55 u c MIN 0300 20 8.8 5. .0 .55 0 J 0 AC-FT 000 9,590 8,250 1.580 1.07 88 86 10 0 0

2 )0

JUL AU6 SEP

1 6.5 2 9.8 3 1.1

5.0 3.1 2.7 2.4 1.9

1.6 1.6 1.4 1.2 1.2

1.0 .88 .55

.35 .26 .26

31

TOTAL MEAN MAX MIN AC-FT 480 SANTA YNEZ RIVER BASIN

11128500 SANTA YNEZ RIVER AT SOLVANG, CALIF. LOCATION.--Lat 34°35'06", long 120°08'37", in San Carlos de Jonata Grant, Santa

DRAINAGE AREA.--579 sq mi.

PERIOD OF RECORD.--October 1928 to No 1936, June 1937 to November 1940 (irrigati only), Octobe 1946 to September 1970.

riod of record. July 29 to Sept. 30, 1953, auxiliary water-sta . Oct. 1, 1953, to Sept. 30, 1968, water-stage recorder at pre ite at datum 2.00 ft higher, aximums and minimums (discharge in cubic feet per second, ga height in feet) for the water years re contained in the following table:

Discharge 16, 1965 2,100 24, 1967 10,200 14, 1968 3.36 25, 1969 a!7.1 1, 1970 3.91

rge, 82,000 cfs Jan. 25, 1969 flow for s . RtMARKS.--Re water year 1969, which are pi

REVISIONS.--WSP 1395: Drainage

OA» DC T NOV DEC

1 0 27 126 58 17 , ?,6 .7 2 0 24 92 48 18 2,4 .3 3 0 22 in 40 16 . 2, a .1 a 0 19 66 35 14 2,2 .6 5 0 16 56 34 13 . 2,2 .7 6 0 17 07 58 1? 2,0 ,3 7 0 15 44 44 12 . 2,0 ,S 1 0 10 41 no 12 . 1.8 ,10 9 0 16 37 35 10 3.0 10 0 15 35 12 10 2,6 11 0 15 32 30 10 '.2 12 0 21 30 29 10 2,8 13 0 20 27 27 10 2.6 14 0 20 24 26 10 2,4 15 ,10 19 24 24 10 2.2 16 479 IB 24 24 10 2.2 17 622 17 24 23 9,6 2.2 18 333 15 24 22 «.' 1,9 19 »7 14 24 22 B,9 1.3 20 32 15 23 22 fl.fc 1.0 21 19 14 24 20 8,2 32 1.5 22 BO 12 24 20 7.5 32 1,9 23 254 10 25 19 7.1 22 2,8 24 576 12 25 19 6.8 13 2. a 25 157 16 24 18 6,« 9.6 l,*> 26 73 17 24 17 6.1 7. 2.2 27 60 18 27 16 5.6 5. 2.4 28 47 58 24 16 4.7 3, 3.9 29 36 1,210 24 _ _ * 5,0 3, 5,3 30 32 429 259 5,3 2. 6.6 31 198 TOUL 823 298.4 606. 82,3 19.30 MEtN MAX 622 1,2110 259 58 18 5 6,6 4.7 MIN 0 10 23 16 4.7 2. 1.0 0 AC-FT SANTA YNEZ RIVER BASIN

11128500 SANTA YNEZ RIVER AT SOLVANG, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SFCf'NO, H»Tt« »EAR OCTOBtH 1966 TH SfcPTFMHEB 1967

1 I 1.5 65 379 84 356 185 62 34 11 3 <} 0 65 338 82 556 665 63 33 9,1

h 1,560 57 2«« 71 706 1194 69 33 9,2 7 4S1 54 282 69 557 422 61 26 6,2 8 9 (10 511 2«8 100 571 328 35 31 3.3 10

11 05 51 219 83 1.250 523 32 28 1.4 12t3 59 53 201) 613 9U2 131 26 26 1.1 i« 95 53 180 1,5110 713 - ^68 23 21 1.1 IS 103 50 173 968 777 225 ?I 18 .67

16 90 19 173 6 14 .37 JO 72 118 110 446 ,200 117 30 13 .60

21 7? 49 133 305 ,180 113 34 13 .59 22 73 57 U3 292 .740 74 35 11 ,25 23 83 1, 30 12« 279 ,810 66 33 9.1 ,20 21 81 «, 00 119 272 ,380 63 30 6.8 .17 25

26 84 I, 71 102 246 812 61 31 9,6 .10 27 28 75 25 «0 226 1.020 68 27 17 .11 29 69 26 18 .06 30 75 44 « - 202 822 71 31 20 0 31

TOTAL MEAN

MN 61 21 5,3 0 0 AC-FT

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 0 0 5.4 16 19 14 54 .4 .49 2 0 C 5.4 13 20 15 44 .8 .53 3 C C 5.9 14 20 15 29 .9 .67 4 0 C 6.0 15 20 16 22 .7 .50 5 0 0 7.7 16 20 17 18 .7 .18

6 0 0 7.2 17 20 19 18 .2 .05 7 0 0 7.8 17 19 22 17 .1 0 a 0 0 8.4 17 20 38 15 .0 0 9 0 C 8.4 11 2C 23 16 .5 0 10 0 3 8.7 13 20 17 20 .6 0

11 0 0 9.3 12 20 15 21 .8 0 12 0 J 9.4 11 20 13 27 .9 0 13 0 0 9.3 11 24 27 41 .2 0

9.4 9.3 9.2 B.9

9.5 4.7 .62 9.C 3.8 .15 0 3.0 9.5 3.4 .12 0 5.1 0 6.5 19 31 23 19

TOTAL 14.6 106.61 MEAN .49 3.44 MAX 6.5 8.2 HIM AC-FT

MAX 4.300 M1N 0 AC-FT 141,600 SANTA YNE2 RIVER BASIN

11128500 SANTA YNEZ RIVER AT SOLVANG, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

AUG SE

1 0 ,350 6,000 150 27 55 37 11 2 0 ' t 60P 5,800 200 27 52 40 10 3 0 ,300 5,100 210 27 47 50 10 4 3 ,300 3,000 200 29 35 70 9.5 5 0 ,400 1,000 300 35 25 70 9.5 t 0 ,010 300 950 130 25 6* 9.2 7 8 0 ,500 1,700 950 130 25 58 9.2 9 0 ,200 1,800 950 130 25 58 9.6 10 0 ,900 1,700 950 130 25 58 9.8 11 9.8 12 0 ,500 165 980 125 25 53 9.8 13 i ,2GO 165 90C 120 25 50 9.8 14 9.8 15 0 ,100 1,000 100 110 25 45 10 16 0 ,800 1,000 69 110 22 43 10 17 18 0 ,300 ,050 62 105 15 38 10 19 750 ,300 ,750 57 105 10 37 10 20 6.0 21 10 35 4.0 22 4.0 23 24 3.5 25

26 25,900 9,001 ,730 37 68 15 29 3.2 27 8,440 8,000 ,000 34 65 20 22 3.1 . 23 4,000 6,500 200 32 62 30 13 3.1 29 32 12 3.1 30 31 1,800 200 57 12 2.5 TOTAL 0 0 228.5 39.7 MEAN 0 0 0 2,893 4,445 1,537 329 88.8 24.1 41.0 7.37 1.3 MAX 0 0 2. MIN 0 0 0 0 1,100 165 27 27 10 12 2.5 .5 AC-FT 0 0 453 7

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO S -PTEMBER 1970 UN JUL *ye SE 1 .64 l.C 3.5 3.9 7.0 277 7.8 2.6 1 .50 2 .64 .B f 3.7 3.7 7.0 155 7.7 2.3 .50 3 .64 .7 3 3.7 3.6 6.T 64 7.1 2.6 .38 4 .64 .8 .28 5 .64 1.1 3.6 3.4 6.4 75 6.4 4.5 .14 .03 0 8 .B4 1.8 4.1 4.1 6.3 25 6.0 6.4 0 9 .84 2.0 4.4 5.5 7.D 22 7.3 8.3 0 10 .91 2.3 4.3 6.2 7.7 20 24 9.0 0 11 . 2.2 4.4 5.9 7.6 18 28 9.6 0 12 . 2.4 4.2 5.4 7.3 15 29 8.6 0 13 . 2.5 4.4 5.5 7.3 15 23 7.0 0 14 . 2.3 4.5 6.2 5.9 14 17 5.7 0 15 . 2.7 4.2 7.9 5.6 14 13 6.4 0 16 . 2.6 4.1 7.5 5.7 13 9.7 5.4 0 17 . 2.5 4.2 7.2 5.6 13 8.0 4.7 0 18 . 2.5 4.6 6.1 5.7 12 6.0 4.5 0 19 . 2.4 4.8 5.9 5.5 11 5.1 4.4 0 20 . 2.4 5.0 6.1 5.5 23 4.8 6.2 0 21 . 2.5 4.9 6.3 5.1 22 4.2 7.6 1 > 0 4 0 23 . 2.5 4.9 6.6 4.9 12 3.3 10 87 0 24 . 2.4 4.8 6.8 4.9 11 2.8 12 70 0 25 . 2.6 4.8 7.0 4.9 10 2.7 12 70 0 26 . 2.7 60 0 27 . 2.8 4.6 7.7 4.8 9.2 2.8 12 60 0 28 . 2.8 4.4 7.7 29 9.1 2.6 12 60 0 29 . 2.9 4.2 7.3 8.7 2.4 12 60 0 30 .1 3.2 4.2 7.3 8.5 2.4 12 60 0 31 .2 4.0 7.3 8.4 11 0 21 1.83 0 MEAN 1.07 2.18 4.29 5.88 6.88 33.8 8.64 7.55 2 44 .059 0 MAX 1.4 3.2 5.0 7.9 29 277 29 12 10 .50 0 60 0 0 0

WTR YR 1970 TOTAL 2 ,223.66 MEAN 6.0 MAX 277 MIN 0 AC-FT 4,410 SANTA YNEZ RIVER BASIN

11129800 ZACA CREEK NEAR BUELLTON, CALIF. LOCATION.--Lat 34°38'55", long 120°11'00", in San Carlos de Jonata Grant, Santa County, on upstre 4.0 miles upstre fro nth. DRAINAGE AREA.--32.8 sq mi. PERIOD OF RECORD.--September 1963 to September 1970. GAGE.--Water-stage recorder. Datum of gage is 471.54 ft above mean sea level. AVERAGE DISCHARGE.--? years, 1.48 cfs (1,070 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (10 cfs), water years 1966-70 Date Time Disch. G.H. Date Time Disch. G.H. Date Time Disch. G.H Feb. f , 1966 0630 *6.1 2.37 Mar. 13, 196 0900 1.0 2.15 Feb. 24, 1969 2130 *1 ,390 9.2 Apr. 5, 1969 1630 59 3.2 Dec. £ , 1966 1700 *191 4.70 Jan. 19, 196E 1800 191 4.42 Jan. 24 , 1967 1800 83 3.28 Jan. 25, 196E 0930 752 7.15 Mar. 4, 1970 1730 »8.9 2.3 Apr. 19 , 1967 1600 31 2.81 Feb. 6, 196E 0530 181 4.35 Apr. 2i , 1967 0500 21 2.68 Feb. 19, 196E 0600 47 3.00 No f low for most of time in each year, P eriod of record: Maximu m discharge, 1,390 ci s Feb. 24, 1969 (gage height, 9.20 ft); no flow Eor most of time in each year. REMARKS .--Records good. Slight regulation by Zaca I ake. Some pumpi abov e station.

DISCHARGE, IN CUBIC FEET PER SECONI ), WATER YEARS OC TOBER 1965 TO SEPTEMBER 1968 NOV. 1 , 1965... .50 APR. 2, 1967... 0 MAY , 1967... 4.3 MAY 29, 1967... .3 1 0 2' DEC. 2< 3C 2 . 3] ^ JAN. 3 , 1966... .60 * > , FEB. y DEC...... 3. 6. 7...... 2.1 13...... 4...... 3. 8...... 10 9...... JAN. 2 , 1967... .80 15...... 3. 2 2 ...... 8.6 ...... 2. 12...... 2 ...... 2.0 13. 15. 3 20...... 3 3 ...... 10 21...... 1 17. FEB. 22...... 8 :::::::::?: 18. MAR. 1 ...... 10 23...... 2 19. 1 20. 1* 1 >...... 2.4 26...... 6. 0 23. 1« ...... 1.7 27...... 6. L 0 24. r 5 i ...... 50 29...... 5. 0 MAR. 8, 1968... . 3] ...... 50 > APR. ] MONTH CFS-DAYS MAXIMUM MINIMUM MEAN RUNOFF I ACRE-FEE NOVEMB .50 0 .033 2. DECEMB .70 0 .036 2. CAL .70 0 .010 7.

JANUAR .60 0 .019 1. FEBRUA 2.8 0 .10 5. WTR 2.8 0 .015 11 DECEMB 64 0 2.88 177 CAL 64 0 .25 184

JANUAR 17 0 .94 58 FEBRUA .10 0 .004 5.5 0 .52 32 19 0 5.58 332 4.3 .20 2.15 132 1.3 0 .40 24 HTR . ig6 7 64 0 1.04 755 CAL ._ . qt,7 19 0 .80 578 MARCH .20 0 .010 HTR .... .30 .2 0 .000 0

NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. SANTA YNEZ RIVER BASIN

11129800 ZACA CREEK NEAR BUELLTON, CALIF.--CONTINUED

1 0 10 52 9. 3.0 .20 0 B.S 3D 11 3.0 .10 0 '.« JJ 10 3,0 .10 0 0 11 23 ?0 2,6 ,10

0 57 22 12 2.2 ,10 0 28 21 6. 1.9 0 0 15 21 6, 1.8 ,10 0 12 21 7. 1.8 .10 0 10 21 7. 1.2 .tO

0 "».6 17 6. 1.2 ,10 0 10 16 6. 1.0 0 0 8.0 16 6. 1,6 0 6.5 IS 5. 1,0 0 11 la 5. 1.0

o 6.5 13 5. .50 0 S.7 13 1. .40 0 9.5 n a. .90 .10 9 17 22 3 4. ,90 1) 10 16 3 a. .20

1 62 ?4 5 3, .10 2 21 12 4 1. .50 3 6.2 1«5 3 a. .50 a 32 45o 3 3. .00 5 404 393 13 3. ,40

6 29? 132 12 3. .40 7 66 69 11 3. ,40 ft 35 77 11 2. ,30 0 4 22 11 3. ,30 0 0 1«> IP 3. ,20 0 1 1? ,20 UL 0 »N 0 0 0 32.1 56.8 17,9 6.3 1.15 ,040 X 0 o o aoa «50 52 2 3,0 .20 N 0 000 5.7 10 2. .10 0 -FT 0 0 0 1,970 3,160 1,100 37 70 2.4

I YR 196S TOTAL 0,50 MEAN .00 MAX .2 MIN 0 »C-FT 0

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

NOV DEC JAN FE8 MAR APR MAY JUN JUL

0 0 1.6

.02 .01

.01

31

TOTAL MEAN MAX MIN AC-FT

MIN 0 AC-FT 6,680 SANTA YNEZ RIVER BASIN

11130500 SANTA YNEZ RIVER NEAR BUELLTON, CALIF. LOCATION (REVISED) .--Lat 34°36'38", long 120°14'53", Santa Rosa Grant, Santa Barba nty, on left bank 0.5 mile downstream from Canada de los Palos Blancos and 3 miles west of Buellton. DRAINAGE AREA. --668 sq mi. PERIOD OF RECORD. --June 1948 to September 1952 (irrigati seasons only); October 1952 to September 1965; Octo­ ber 1965 to September 1970 (wading stages only). GAGE. --Water- stage ecorder. Datum of gage is 260.68 ft (revised) above mean sea level (Bureau of Reclamation bench mark). S WSP 1928 for history of changes prior to Mar. 29, 1962, to Oct. 1, 1969, at site 100 ft upstream at dat REMARKS. --Records good except those for 1969, which are poor. No gage-height record Jan. 4 to Sept. 30, 1969. Discharge above wading stages not generally reported herein. Flow regulated by Jameson Lake, Gibraltar Res­ ervoir, and since November 1952 by Lake Cachuma (see stations 11121000, 11122000, 11125500). Water diverted out of basin from Jameson Lake, Gibraltar Reservoir, and Lake Cachuma to cities of Montecito, Santa Barbara, and Goleta for municipal supply. Water pumped from wells along banks of river for irrigation in valley upstream. Water-quality records for the water years 1966-68 are published in reports of the Geological Survey. ,)lb ^ .SO t /* 30 U 1 .50 M 103 6b a« u 3 . 40 H bS b4 26 13 2 .40

b 79 90 25 1 .i 'f .4(1 4 71 '(t 24 13 -> . .30 4 t)4 b4 ?3. 1^ . .30 3 6d b? 22 14 . .30 'i bb Sb

1 40 41 20 Ib .30 1 J9 411 20 13 . ?0 0 3b 40 ?U 1 b . .20 0 39 3H an ib .ao 0 36 3 ' ao .ib .20 u 3b Jb ao ib .la 0 J4 3b 20 14 , . ao IB 33 33 ao 12 .10 IB 32 3^ 19 9.2 . 0 IB 31 32 19 7.3 ' 0

IS Jl 3M 17 7.0 , 0 Ib 34 29 16 b.3 0 1 9 29 30 16 h.U 0 29 ._.__- 16 b.3 . 0 ...... 13 b.J 0 90 127 13 ...... 0 1.419 652 434.0 b . a 7.40 0 50.' 21. U 14.? 1 e 1 J . 24 0 9n 32 36 . .90 0 18 29 29 13 b.J 1 0 0 2«Slu U290 tthl i 8 Ib 0 SANTA YNEZ RIVER BASIN

11130500 SANTA YNEZ RIVER NEAR BUELLTON, CALIF.--CONTINUED

39b 1.9 311 1.1 33.) .77 .67

.b9

163 15b 14H

139 1411 133

2BB 286 288

luV 2f>7 11 31 1.1 .17 II lOb 260 Ti 29 .91 .17 0 102 246 79 27 .78 .17 0 230 7V 26 .63 .17 0 ...... 2 ?V ?v 23 .bl .17 0 25b HO 2.4 .lb

1.4b7 263.63 14.45 .61 1 94 48.6 R.50 .47 .020 44b B? 20 2.9 .14 1U2 23 .61 .16 0

l.b 1.5 1.3 1.3 1.3

1 l.S 7.1 8.2 2 26 16 22 1.1 .20 2 1.8 7.1 8.2 3 Zb 16 22 1.1 .16 3 2.0 6.8 8.4 3 Zb 16 2i .91 .07 4 2.3 7.0 H.2 3 Z3 16 lb .94 .07 5 2.4 7.0 H.J .04

6 2.6 7.3 8.3 5 22 1* 8.V .63 .01 7 2.b 6.9 8.3 b 2n 16 7.7 .60 U H 2.6 7.1 B.J 7 IV lb 7.2 .47 9 2.9 7.4 8.4 7 19 lb b.V .3H 0 0 3.1 8.2 8.0 a .... it, b.b

«N .98 b.32 B.01 2.1 23.3 19.3 2?. 7 2.13 .34 * 3.3 8.2 H.8 19 3li .14 b2 5.7 .9" N 0 J.4 7.4 8.4 IV lb 6.8 .3S 0 -FT 60 317 492 /44 1.340 1.190 l,3iO 131 SANTA YNEZ RIVER BASIN

11130500 SANTA YNEZ RIVER NEAR BUEUTON, CALIF.--CONTINUED

1 0 1. ,3-0 6.700 ,70 3» .0 5.0

3 0 .0 5,6 « 0 1. ,300 3.500 210 32 33 OS .0 5.8 5 0 4. ,550 1,100 310 an 30 60 .0 6.0

6 0 0, .250 330 160 140 28 SS .0 *>,0 7 0 28 56 .0 f>.? K 0 .2 6,4 <) 0 .0 6,6 10 0 28 50 ,» 6.6 U 0 ?8 08 .6 6.6

13 0 .2 f>,6 10 4. .110 US 5SO 115 28 3» .1 f>.6 15 0 1, .280 1,000 110 110 ?8 36 .1 6.6 16 0 o, ,eso 1,050 f>o 105 ?8 33 ,3 6.6 IT .37 1. ,500 180 67 100 22 43 .S . f>.6 1" .8 6.6

20 1 , 0 12 3? .8 6.6

21 'I. ?,t 00 ,350 ,770 55 96 11 3? .0 6.6 2? ?.. 3 ZO .590 ,770 50 15 II 31 .2 6.6 23 ?. 1 33 6,800 ,770 07 95 11 31 .0 6,8 20 2. 6 11 30 .5 6,8 25 11 30 .7 6.8 26 «. 26,9 12 29 .9 6.8 27 10 2? .6 6.8 28 3. «,3 00 7,000 220 38 65 14 12 .0 7.0 29 16 1? .* 7.0 31 UTtL

»» 0 4.2 42 0 0 3,8 1.110 165 3« 3? II 10 .1 5.4

1 b. B.b 19 .7 U 2U2 11 .0 .2* i «. B.7 16 .fe 12 12W 9.5 .1 .U 1 7. b.-t 15 .7 13 6? 9.3 .7 .06 < 7. 9.1 It, .4 U 63 H.S .9 .03 b 7. 9.3 15 .3 1J 1S3 H.U .» .01 6 1. ID IS .2 U 67 7.8 .2 0 1 7. 10 16 .7 1ft 07 7.J .3 . 0 « H. 11 17 13 .IK 6.B .3 . 0 9 V. 10 17 14 3". 6.6 .1 0 10 9. 9.7 12 Ib 24 K.I .9 . 0

11 H. 9.b IV Ib 27 28 .3 0 12 8. 9.2 10 Ib 24 3M .5 0 U a. 9.3 11 Ib 22 37 .1 0 14 B. 11 11 1* 2D 27 .7 0 Ib H. 11 i«; 10 20 2t> .5 0 16 H. in 12 16 )H 14 .5 0 17 9. 10 12 16 18 13 .? 0 Ib 9. 11 13 13 18 11 .3 0 19 8. 14 13 Ib 17 9.4 .2 0 20 . 9. 13 14 Ib 16 9.1 .2 0 21 D. 12 14 15 4b 0.2 .1 U il 9. 12 U Ib 23 7.7 .1 o 23 b. 12 13 16 19 7.1 .1 0 12 12 Ih 16 7.1) 1.9 . 0 25 ti! 12 12 16 Ib 5.D ?.0 ? 0 26 B. fZ 12 17 14 b.b ?.a ?" 0 27 B. 12 11 H 13 5.8 U* S 0 28 8. 12 U 25 13 5.4 1.3 d 0 *

MEAN 8.4 10. B 13.0 1 2.2 IS.? 39.3 11. 8 ?.9J ].< 6 .11)6 0 0 MIX 9. 14 19 16 25 202 38 "5.0 1 7 .24 0 0 HIM 7. 8.b 9.9 9.2 11 I'd 5.0 1.3 .< t .0 0 U

C»C YR 1V69 DIAL a91.b21.4U MtA-4 7 99 «ix 42,000 HIN 3.1 OC-FT 573.200 SANTA YNEZ RIVER BASIN

11131500 SANTA YNEZ RIVER AT COOPER'S REEF, NEAR LOMPOC, CALIF. LOCATION.--Lat 34°36'48", long 120°21'23", near boundary of Canada de Salsipuedes Grant, site 100 ft downstream. DRAINAGE AREA.--708 sq mi. PERIOD OF RECORD.--October GAGE.--Water-stage recorder. Altitude of gage is 200 ft (from topographic map). Prior to Sept. 18, 1969, at site 100 ft downstream at datum about 0.6 ft higher (reference marks destroyed by floods in 1969), EXTREMES.--Maximums and minimums (discharge in cu feet per second, gage height in feet) for the wi .ter years 1966-70 are contained in the following table: Maximum daily Wtr yr Date scharge G.H. Date Discharge 1966 Dec. 29, 1965 2,230 6.18 Several days 1967 Jan. 24, 1967 10,200 12.25 do. 1968 Apr. 15, 1968 129 2.49 Aug. 12 to Sept. 30, 1968 1969 Jan. 25, 1969 81,000- a22.5 Oct. 1-15, 1968 1970 Mar. 1, 1970 566 5.00 Several days a From floodmark. Period of record: Maximum discharge, 81,000 cfs Jan. 25, 1969 (gage height, 22.5 ft, site and in use, from floodmark); no flow for several months in some years.

ns 11121000, 11122000, 11125500). Water diverted out of basin from Jameson Lake, Gibraltar Reservoir, an municipal supply. Water pumped from wells along banks of river f. igation in valley upstream. REVISIONS.--WSP 1715: Drainage area. DISCHARGE IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY OCT

1 .10 0 51 215 128 40 9.5 .90 .30 .10 .10 2 .10 0 50 155 1 5 43 9.9 .90 .20 .10 .10 3 .10 0 48 132 0 3B 9.7 l.C .20 .10 .10 4 . 0 0 46 113 9 32 9.7 ) 80 .10 .10 .10 5 . 0 0 43 99 3 32 8.7 .90 .10 .1C .10 6 . 0 0 40 93 9 31 8.8 1.0 .10 .10 .10 7 . 0 0 38 85 9 30 8.4 .90 .10 .10 .10 a . 0 0 37 76 6 29 8.0 .70 .10 .10 .10 9 .10 0 36 70 1 27 7.B .70 .10 .10 .10 10 .10 0 35 63 6 27 15 .60 .10 .10 .10 11 .10 0 32 58 0 27 20 0 .80 .10 .10 .10 12 .10 0 35 56 6 26 12 0 .BO .10 .10 .10 13 .10 c 35 52 5 26 10 i BO .10 .10 .10 14 0 .10 33 50 6 26 10 .80 .10 .10 .10 15 0 .1C 34 51 5 24 10 .80 .10 .10 .10 16 0 22 33 48 2 23 10 .90 .10 .10 .10 17 .10 607 31 43 1 23' 9.B .70 '.10.10 .10 .10 18 .10 451 28 46 0 21 10 .70 .10 .10 19 0 1B6 28 43 8 19 9.5 .90 .10 .10 .10 20 0 67 29 39 a is 9.1 1.0 .20 .10 .10 21 0 37 29 37 6 17 9.1 .BO .10 .1C .10 22 0 26 2T 37 3 16 8.9 .80 .10 .10 .10 23 0 169 24 35 53 16 9.2 .60 .10 .10 .10 24 0 624 24 36 49 16 B.6 .40 .10 .10 .10 25 0 309 24 31 40 15 7.6 .50 .10 .10 .10 26 0 193 25 29 40 15 6.5 .50 .10 .10 .10 27 0 116 26 28 38 13 5.6 .40 .10 .10 .10 28 0 83 28 25 3B 12 5.2 .40 .10 .10 .10 29 0 «4 1,190 37 11 4.9 .40 .10 .10 .10 30 0 52 748 487 10 4.5 .40 .10 .10 .10 31 0 353 173 10 .10 .10 276.0 55.90 21.80 3.60 3.10 3.00 MEAN .C48 too 105 82.0 63.7 23.0 9.20 1.80 .73 .12 .10 .10 MAX .10 624 1,193 487 128 43 20 4.2 1.0 .30 .10 .10 KIN 0 0 24 25 38 10 4.5 .70 .40 .10 .10 .10 7.1 6.2 6.0 SANTA YNEZ RIVER BASIN

11131500 SANTA YNEZ RIVER AT COOPER'S REEF, NEAR LOMPOC, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 .10 .10 .10 60 580 97 361 1,150 73 12 1.1 .37 2 .10 o .i-1 58 475 96 511 988 69 13 .90 .40 3 .10 3 .50 68 12 .70 .37 4 .10 0 1C 54 354 94 566 682 65 12 .70 .35 5 .10 0 25 52 311 Bl 1,100 1,050 79 11 .70 .35

6 .10 3 1,000 51 291 78 954 826 B2 12 .69 .35 7 .10 .10 900 49 2B9 75 701 573 81 13 .74 .34 8 .10 .10 121 73 13 .71 .31 9 .10 C 46 44 234 69 616 362 60 11 .SB .29 1 j .10 0 28 44 237 105 637 547 50 15 .65 .31 11 .10 44 209 72 1,300 736 50 17 .68 .31 .1C 56 1,360' 12 .10 0 49 41 187 528 531 51 15 .70 .31 13 .10 0 26 39 172 4,100 624 381 45 14 .62 .30 14 .10 0 37 38 161 3,000 688 386 40 14 .60 .30 15 .10 .10 61 36 148 1,470 791 295 3B 14 .58 .29 16 .10 .10 67 33 150 .56 .31 17 .10 .IJ 58 32 148 853 5BB 161 34 12 .55 .26 18 .10 .10 58 30 139 887 876 145 36 11 .50 .27 19 .10 .10 58 29 136 615 1.330 136 36 8.9 .51 .28 20 .10 .10 54 21 .10 .10 52 32 130 405 1,570 119 30 5.4 .50 .23 22 .10 .10 52 28 3.9 .52 .26 23 .10 .10 54 1.630 127 310 2,620 .50 .27 24 .10 .10 63 3, 590 125 307 2, '180 75 25 2.8 .48 .25 25 .10 .21 26 .10 .10 65 1.800 106 288 1.300 74 19 l.B .45 .22 27 0 .10 3 1,480 100 287 1,200 68 18 1.7 .46 .22 28 .10 .10 8 29 .10 .10 6 564 259 1.420 76 13 1.1 .40 .24 30 .10 .10 8 613 248 1,290 77 12 1.3 .40 .22 31 .10 621

MAX 82 17 1.1 .40 HIM 0 0 .1C 10? 68 12 1.1 .39 .21 17

NOTE . STAGE-DI SCHARGE RELATION INDEFINITE DEC. 10 TO JAN 21, JUNE 6 TO SEPT. 30.

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTO )ER 1967 TO SEPTEMBER 1968 DAY OCT

1 .22 .49 .37 7.8 23 24 40 6.7 .57 .1C .04 2 .20 .42 .36 B.2 24 24 102 5.8 .57 .09 .04 3 .22 .47 .31 8.6 25 25 76 5.9 .52 .10 .04 4 26 28 52 5.5 .50 .09 .04 5 .21 .56 .48 7.2 27 27 34 5.2 .50 .08 .04 6 .22 .45 .35 9.3 27 25 27 5.0 .41 .06 .04 7 .21 .98 .42 8.3 30 35 25 4.7 .40 .06 .04 8 .21 .41 .49 8.4 30 55 22 4.4 .40 .06 .04 9 4.2 .38 .06 .04 10 .23 .45 .32 10 30 77 19 4.0 .35 .05 .04 11 .41 .41 .36 9.7 31 47 17 3.B .35 .05 .04 12 .15 .41 .36 10 33 24 15 3.6 .31 .04 .04 13 .19 .42 .41 11 4 33 14 3.4 . 4 .28 .04 .04 14 .20 .38 .41 12 8 45 28 3.2 . 2 .27 .04 .04 15 .20 .40 1.1 11 9 36 106 3.2 . 3 .24 .04 .04 16 .20 .37 2.1 11 7 32 84 3.0 .92 .25 .04 .04 17 .20 .36 2.5 12 2 30 48 3.0 .81 .20 .04 .04 18 .20 .36 4.2 12 B 27 24 2.8 .70 .18 .04 .04 19 .20 .43 6.1 12 8 24 23 2.8 .61 .17 .04 .04 20 .20 .44 4.3 12 4 24 25 21 .20 .61 3.4 13 29 24 26 2.6 .56 .17 .04 .04 22 .20 .66 4.3 14 26 23 24 2.4 .58 .20 .04 .04 23 .19 .65 5.4 15 25 22 24 2.4 .57 .17 .04 .04 24 .20 .64 5.7 17 24 22 18 2.2 .64 .17 .04 .04 25 .20 .50 6.1 17 21 19 14 2.2 .58 .17 .04 .04 26 .26 .27 7.0 17 22 18 12 2.0 .56 .15 .04 .04 27 .19 .29 7.1 19 23 18 10 2.0 .60 .15 .04 .04 28 .39 .29 7.2 21 21 16 10 1.8 .53 .13 .04 .04 29 .76 .33 7.6 21 22 16 8.7 1.7 .53 .13 .04 .04 30 .61 .39 7.5 23 15 7.B 1.8 .56 .12 .04 .04 31 .56 7.1 22 16 2.0 .11 .04 TOTAL B.08 13.86 93.99 394.5 B48 943 955.5 105.9 31.24 8.66 1.60 1.20 MEAN .26 .46 3.03 12.7 29.2 30.4 31.9 3.42 1.04 .28 .052 .040 MAX .76 .98 7.6 23 42 92 106 6.7 2.1 .57 .10 .04 MIN .15 .27 .30 6.3 21 15 7.8 1.7 .53 .11 .04 .04 AC-FT 16 27 1B6 782 1,680 1.B70 1,900 210 62 17 3.2 2.4

HTR YR 1968 TOTAL 3,405.53 MEAN 9.3 MAX 106 MIN .04 AC-FT 6,750 490 SANTA YNEZ RIVER BASIN

11131500 SANTA YNEZ RIVER AT COOPER'S REEF, NEAR LOMPOC, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER. 1969

OAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

2 .04 .05 I? *10 1,650 6(100 310 70 50 12 3 .04 .C5 .1? .10 1,350 5,200 310 TO 45 20

5 .'C4 .C5 .12 .10 1,780 1,120 310 TO 38 60

7 .04 .05 .11 .10 4,200 560 1,000 171 34 54 6 .04 .05 .11 .10 2,400 1,700 1,000 170 32 50 9 .j4 .35 .11 .10 2,300 1,800 1,000 170 32 48

11 .04 .05 .10 .10 1,750 BOO 1,000 170 30 45 12 .04 .05 .10 .10 1.5CO 35? 1,050 160 30 43 13 .04 .05 .10 .10 1,200 170 950 155 30 41 14 .04 .35 .1C .10 1,120 170 600 152 28 39

16 .05 .15 .1" .10 1.90C 1,003 160 135 27 36 17 .05 .14 .10 .10 1,550 1,050 138 130 25 36 18 .05 .14 .10 .10 1,380 ,000 130 125 25 35 19 .05 .14 .1C 200 1,430 ,150 125 120 24 34 .80 2C .05 .14 .10 450 1.12C ,800 115 116 22 33 .70

21 .05 .14 .10 2,200 1,380 ,800 105 112 '20 32 .70 22 .05 .14 .10 50C 1.620 ,800 100 110 19 31 .70 23 .05 .14 .10 175 7,270 ,800 90 105 18 30 .70 24 .05 .13 .11 900 21,800 ,780 85 100 17 30 .70 25 .05 .13 .10 38,000 33,000 ,770 80 95 16 29 .70

26 .05 .13 .10 30,000 9,070 ,770 80 90 15 28 .70 27 .05 .13 .09 8,870 8,210 ,400 80 85 14 21 .70 28 .05 .13 .09 4,100 6,540 800 75 80 13 10 .70 29 .05 .13 .09 3,800 330 75 75 12 8.0 .80 3C .05 .13 .09 2,070 - 330 7C 70 11 7.3 .80 31 .05 .09 1,850 320 65 7.2 .90

TOTAL 1.40 2.89 3.21 93,116.80 131,950 51,120 11,818 3,546 819 1,014.1 68.60 MEAN .045 .C96 .10 3,004 4,713 1,649 194 114 27.3 32.7 2.21 MAX .^5 .15 .12 38,000 33,000 6,750 1,050 171 55 60 7.C MIN .04 .05 .09 .10 1,120 170 70 65 U 7.2 .70 AC-FT 2.8 5.7 6.4 184,700 261,700 101,4CO 23,440 7,030 1,620 2,010 136

MTR YR 1969 TOTAL 293,566.30 MEAN 804 MAX 38,000 MIN .04 AC-FT 582,300 NOTE. NO GAGE-HEIGHT RECORD JAN. 4 TO SEPT. 17.

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 197D

MAR APR HAY JUN JUL

7.2 8.0 118 .17 7.6 7.6 285 .32 .15 8.0 7.1 121 .32 .15 7.4 6.6 .33 7.1 7.1

7.C 9.4 .39 6.9 8.8 .30 7.2 9.8 .31 7.8 9.8 .31 ft.O 9.8 .31

8.3 .31 .09 8.4 .31 .09 .04 8.2 .30 .09 .05 9.0 .32 .08 .04 8.9 .34

.86 .77 .72 .03 .03 .03

9.8 9.5 9.3 9.8 9.8

9.3 6.7 9.3 6.0 8.9 5.1 9.6 4.7 8.7 13 17 4.3 8.0 16

TOT MEAN 11.8 13.1 16.3 17.5 15.7 .090 MAX 15 19 24 29 58 .17 MIN AC-FT 703 805 1,000 970 933 5.5 SANTA YNE2 RIVER BASIN

11132500 SALSIPUEDES CREEK NEAR LOMPOC, CALIF. LOCATION.--Lat 34°35'19", long 120°24'27", in W% sec.24, T.6 N., R.34 W., Santa Barbara County, on right bank at

DRAINAGE AREA.--47.1 sq mi. PERIOD OF RECORD.--January 1941 tc> September 1970. GAGE.--Water-stage recorder and concrete low-water control. Altitude of gage is 240 ft (from topographic map). AVERAGE DISCHARGE.--29 years, 8.55 cfs (6,190 acre-ft per year); median of yearly mean discharges, 3.3 cfs (2,400 acre-ft per year) . EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (100 cfs), water years 1966-70 Date Time Disch. G.H. Date Time Disch. G H. Date Time Disch. G .H. Nov. 16, 1965 1445 2 ,200 6.87 Jan . 22, 1967 0715 528 3 91 an. 25, 1969 0230 *4,880 11 .30 Nov. 23, 1965 2315 418 3.53 Jan . 24, 1967 1045 *7,090 14 46 eb. 6, 1969 0115" 483 3 .78 Dec. 29, 1965 0130 *2 ,540 7.55 Apr . 21, 1967 1015 173 2 57 eb. 15, 1969 1200 2,350 7 .18 Jan. 30, 1966 0045 2 ,120- 6.7! eb. 23, 1969 1830 3,140 8 .58 Feb. 6, 1966 0815 136 ' 2.3') Mar . 13, 1968 0800 *165 2 56 eb. 28, 1969 1115 1,350 5 .51 /\pr. 5, 1969 1530 1,380 5 .56 Dec. 6, 1966 1600 365 3.31! Jan . 19, 1969 1930 1,330 5 59 Mar. 4, 1970 1745 *905 4 . 77 Annual mini mum daily d ischar je, water ye irs 1966-70 Wtr yr Date -Discharge Wtr yr Date Discharge 1966 Oct. 1-26, 1965 0 1969 Oct 2, 2 , 1968 0 1967 Oct. 20 to Nov. 6, 1966 .30 1970 Aug 24 to Sept. 15 , 1970 , .06

Period of re ord: Maximum discharge, 11,400 cfs Mar 15, 1952~(gage height, 20.8 ft); no flow t times in some years. REMARKS.--Records good except those for periods of indefinite stage-discharge relation, which e poo lation above station. Small diversions for irrigation above station. REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 AY JUl AUG StP 1 0 .0 1 56 74 11 .7 3. .9 1.0 .50 .40 2 0 .0 1 41 42 13 .7 3. .6 1.0 .50 .40 3 0 . c .5 35 32 10 .2 3. .6 .60 .50 .40 4 0 . 0 .2 33 28 9.8 .6 3. .9 .70 .50 .40 5 0 . c .8 31 30 9.9 .1 3. .4 .60 .50 .40 k 0 . 0 .6 24 70 10 .1 3. .6 .70 .50 .40 1 0 0 .9 22 33 9.4 .8 3. .0 .60 .50 .40 B 0 . a .9 20 27 9.4 .4 3. .0 .60 .50 .40 9 0 . 0 .3 19 23 9.4 .1 3. .2 .50 .50 .40 10 0 . 0 .3 17 23 9.4 .5 3. .0 .70 .50 .40 1 0 .1C .9 16 21 9.4 .4 3. .8 .60 .SO .40 2 0 .10 .6 15 20 9.1 .0 3. .3 .60 .50 .40 3 0 .10 .2 14 19 9.1 .5 3. .2 .70 .50 .40 4 0 40 .3 13 16 9.2 .7 2. .1 .60 .50 .40 5 0 19 .9 12 16 9.3 .6 2. .90 .60 .50 .40 6 0 454 .5 12 16 8.B .7 2. .0 .50 ' .50 .40 1 0 253 .5 11 16 8.4 .8 2. .2 .50 .50 .40 8 0 153 .1 11 14 7.9 .1 2. .0 -.50 .50 .40 9 0 42 .1 11 13 7.7 .0 2. .80 .60 .50 .40 0 0 13 .1 11 12 7.3 .6 3. .70 .60 .50 .40 1 0 9.B .5 10 12 6.6 .2 1. .60 .70 .50 .40 2 0 47 .5 11 12 6.5 .4 4. .70 .60 .50 .40 3 0 13B .7 10 12 6.2 .8 3. .BO .40 .50 .40 4 a 121 .7 9.7 11 6.1 .6 3. .90 .30 .50 .40 5 0 74 .9 9.4 11 6.0 .0 2. 2.3 .30 .50 .40 26 a 39 .5 9.9 11 5.7 .6 2. .9 .50 .50 .40 27 . 0 16 .1 22 9.6 5.6 .6 3. .7 .50 .50 .40 28 . 0 13 5 11 10 5.7 .6 2. .6 .50 .50 .40 29 . a 12- 66 26 5.5 .7 2. .3 .50 .50 .40 30 . 0 12 133 420 ______5.6 .5 2. .1 .50 .50 .40 31 . a 106 47 5.4 i. .50 .50 OTAL . 0 1,457.10 1.126.0 1,014.0 635.6 252.6 111.4 92. 4 .90 16.70 15.50 12.00 EAN .0 6 46.6 36.3 32.7 22.7 6.15 3.71 2.9 .40 .60 .50 .40 AX . a 454 6B1 420 74 13 5.6 4. 2.3 1.0 .50 .40 IN 0 .10 3.7 9.4 i .60 .30 .50 .40 501 221 182 63 37 -31 24

NOTE. STAGE-DISCHARGE RELATION INDEFINITE JULY 27 TO SEPT. 30. SANTA YNEZ RIVER BASIN

11132500 SALSIPUEDES CREEK NEAR LOMPOC, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATEF YEAR OCTOi ER 1966 TO SEPTEMBER 1967

DAY OCT NOV DEC JAN FEB MAR APR HAY JUN JUL AUG SEP 1 .40 .30 1.0 2.2 16 4.5 9.8 8.5 3.4 2.2 .78 .68 2 .40 .30 1.8 2.1 12 4.5 9.9 B.3 3.4 2.1 .77 .67 3 .40 .30 2.1 2.1 11 5.2 5.9 8.6 3.4 2.0 .77 .67 4 .40 .30 8.4 3.4 2.0 .76 .66 .40 .30 .90 2.0 8.8 4.6 16 7.7 3.4 1.9 .76 .66 6 .40 .30 73 1.9 7.9 4.5 8.2 7.7 3.4 1.8 .75 .66 7 .40 l.l' 37 1.9 7.6 4.1 13 7.2 3.3 1.7 .74 .65 a .40 l.C 21 1.8 8.5 3.9 a. 6 6.7 3.3 1.6 .74 .65 9 .40 .70 12 1.8 .73 .65 10 .40 .50 1C 1.7 6.7 3.9 6.1 6.7 3.1 1.5 .72 .64

11 .AC .40 8.0 1.7 6.2 4.8 23 6.7 3.1 1.4 .72 .64 12 .40 .40 7.0 1.6 5.8 B.2 9.7 6.7 3.1 1.3 .72 .64 13 .40 .50 6.0 1.6 5.3 8.2 7.3 6.7 3.0 1.3 .72 .64 .40 .50 5.0 1.6 15 .40 .50 4.5 1.5 4.7 4.7 6.1 6.2 2.9 1.2 .72 .64

16 .40 .60 4.0 1.5 4.5 13 5.9 6.2 2.9 1.1 .72 .63 17 .43 .7.1 3.7 1.5 4.9 11 5.4 5.8 2.B 1.1 .72 .63 18 .40 .70 3.5 1.5 4.9 7.3 30 4.9 2.8 1.3 .71 .63 19 .40 .70 3.3 1.5 4. 6.6 26 4.9 2.7 1.0 .71 .63 20 .30 .90 3.2 1.5 4. 6.0 15 4.5 2.7 1.0 .70 .62 21 .30 1.2 3.1! 1.6 4. 5.5 58 4.5 2.7 .96 .70 .62 22 .30 1.0 2.9 147 4. 5.5 41 4.5 2.6 .92 .70 .62 23 .30 .90 2.8 37 4. 5.3 19 3.7 2.6 .90 .70 .62 24 .30 .90 2.7 1,470 4.6 4.9 35 3.7 2.6 .89 .70 .61 25 .30 .70 2.6 89 7.1 5.1 15 3.7 2.5 .88 .70 .60 26 .30 .70 2.5 36 5.0 4.7 12 4.1 2.5 .85 .69 .60 27 .30 .7C 2.4 24 4.5 5.1 11 3.4 2.4 .63 .68 .60 26 .30 1.0 2.4 19 4.5 5.0 10 3.4 2.4 .81 .68 .59 29 .30 1.2 2.3 15 5.1 10 3.4 2.3 .80 .68 .59 33 .30 1.0 2.3 35 ...... 5.1 B.9 3.4 2.2 .79 .68 .58 31 .30 2.2 28 9.7 3.4 .78

TOTAL 11.20 23. 2C 235. BO 22.27 18.96 MEAN .36 .67 .72 .63 MAX .40 1.2 73 1,470 16 13 58 8.6 3.4 2.2 .78 .68 HIN .30 .30 .70 1.5 4.5 3.9 5.4 3.4 2.2 .78 .68 .58 AC-FT 22 40 44 38 A, 860 WTR YR 1967 TOTAL 3,381 .94 MEAN 9.27 MAX 1,470 KIN . 30 AC-FT 6,710

NOTE STAGE-DISCHARGE RELATION INDEFINITE DEC. 10 TO JAN. 21, JUNE 6 TO SEPT . 30.

DISCHARGE, IN CUBIC FEET PER SECOND , WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

DAY JUN IUL AUG SEP 1 .59 .45 2.7 1.5 2.3 1.2 4.5 .64 .35 .14 .09 .04 2 .59 .45 1.7 1.6 1.9 1.1 5.9 .62 .26 .04 .09 .04 3 .59 .45 1.4 1.6 1.9 .98 2.2 .65 .19 .04 .09 .04 4 .59 .41 1.2 1.6 1.9 .87 1.8 .70 .20 .03 .09 .03 5 .59 .39 1.6 1.6 1.9 .81 1.7 .70 .21 .03 .09 .03 6 .59 .43 1.6 1.6 1.9 .71 1.6 .68 .20 .05 .09 .03 7 .59 .40 1.4 1.7 1.9 2.2 1.7 .65 .21 .07 .06 .03 a .59 .47 1.3 1.8 1.9 14 1.4 .69 .21 .06 .C6 .03 9 .52 .58 1.2 1.9 1.9 2.0 1.4 .65 . 1 .07 .06 .02 10 .54 .75 1.2 2.2 1.9 1.0 1.4 .75 . 5 .06 .04 .02 11 .55 .74 1.2 2.9 1.9 .74 1.4 .74 . 5 .05 .04 .02 12 .59 .73 1.3 1.8 2.0 .73 1.4 .61 . 6 .04 .04 .02 13 .65 .81 1.3 1.6 2.9 28 1.5 .86 . 9 .05 .04 .02 14 .76 .82 1.4 1.6 2.8 3.5 1.5 .94 . 6 .04 .04 .02 15 .60 .97 1.4 1.6 2.4 1.8 1.6 .83 .21 .04 .04 .02 16 .42 1.0 1.3 1.9 2.4 1.7 1.4 .83 .22 .07 .04 .02 17 .44 1.0 1.4 .73 .21 .18 .04 .01 18 .47 1.2 6.0 1.9 4.2 1.7 1.6 .60 .21 .23 .04 .02 19 .52 2.0 3.3 1.9 2.6 1.3 1.6 .29 .21 .15 .04 .02 2C .52 3.2 2.0 1.9 2.4 1.2 1.5 .27 .21 .13 .04 0

21 .55 3.4 1.5 1.9 2.2 1.4 1.0 .27 .19 .12 .04 0 22 .57 2.6 1.4 1.9 2.3 1.3 1.0 .27 .18 .14 .04 0 23 .54 1.5 1.4 1.9 1.9 1.4 .96 .27 .14 .16 .04 0 24 .47 1.2 1.4 1.9 1.9 1.5 1.0 .25 .16 .13 .04 0 25 .55 .96 1.4 1.9 1.8 1.5 1.0 .23 .16 .13 .04 .01 26 .76 1.1 1.4 l.S 1.6 1.4 .97 .31 .18 .15 .04 .01 27 .76 1.0 1.4 2.5 1.6 1.6 1.0 .33 .21 .15 .04 0 28 .57 1.2 1.1 2.5 1.6 1.6 .88 .38 .15 .14 .04 .01 29 .30 1.2 1.1 1.6 1.4 1.6 .63 .37 .16 .10 .04 .01 33 .32 7.1 1.2 1.7 - .... 1.7 .61 .36 .16 .10 .04 .01 31 .40 1.4 2.4 1.8 .36 .10 .04 TOTAL 17.11 38.53 50.6 58.4 66.4 84.94 47.55 17.03 5.81 2.99 1.60 .53 MEAN .55 1.28 1.63 1.88 2.29 2. 74 1.59 .55 .19 .097 .052 .018 MAX .78 7.1 6.0 2.9 7.4 28 5.9 .94 .35 .23 .09 .04 M1N .30 .39 1.1 1.5 1.4 .71 .61 .23 .14 .03 .04 0 AC-FT 34 76 100 116 132 168 94 34 12 5.9 3.2 1.1 SANTA YNEZ RIVER BASIN

11132500 SALSIPUEDES CREEK NEAR LOMPOC, CALIF.--CONTINUED

DISCHARGE. IN CUBIC

DAY JUN JUL

1 .Cl .02 .09 .21 25 125 1 ) 12 6.7 4. 2 0 .32 .08 .18 22 as 2 J 12 6.6 4. 3 .31 .05 .06 .13 21 76 2 ! 12 6.6 4. 4 .01 .^3 .09 .09 21 74 1 J 13 6.7 3. 5 .01 .02 .08 ! 12 6.5 3. 6 6.7 3. 7 .Cl .01 .09 .09 58 61 75 11 6.7 3. 8 .02 .31 .08 .11 31 54 69 11 6.7 3. 9 .Cl .01 .07 .12 28 50 42 11 6.7 3. 1', .01 .01 .07 .12 27 46 24 11 6.7 3. 11 .22 .01 .14 .12 24 35 22 11 6.6 3. 12 .01 .01 .13 .12 36 34 21 11 6.7 3. 13 ,~>2 .Cl .12 .28 1* .07 .C2 .42 .4 20 31 18 9.D 6.7 15 .02 .22 .67 .50 516 28 17 8.9 6.7 16 .01 .09 1.5 .24 91 25 16 8.7 6.7 3. 17 .C2 .C9 .48 .17 59 24 16 8.2 6.7 2. 18 .02 .09 .28 .8 78 23 16 7.8 6.7 2. 19 .02 ,u9 .21 48 119 22 15 7.9 6.2 2. 2, .Jl .09 .30 18 63 21 15 7.8 6.2 2.

21 .01 .06 .26 34 96 27 13 7.9 5.9 2. 22 .01 .C6 .25 8 148 22 13 8.1 5.4 2. 23 .01 .07 .22 4 650 20 14 8.4 5.4 2. 24 0 .C6 .28 29 580 18 13 8.1 5.4 2. 25 .01 .06 .64 1,65 312 17 13 7.6 5.4 2.

26 .Cl .08 1.5 36 129 16 12 6.7 5.3 2. 27 .01 .07 .81 10 88 16 12 7.0 5.4 2. 28 .01 .08 .57 7 381 15 12 7.5 5.2 2. 29 .02 .08 .42 5 15 12 7.2 4.9 2. 30 .03 .C9 .33 3 14 12 6.8 4.5 2. Jl 2. 1.177 899 288.1 185.3 94. MEAN .015 .054 .34 121 138 38.0 30. C 9.29 6.18 3.0 MAX .07 .22 1.5 I 6.7 4. MIN 0 .<,! .06 .09 20 14 1 ! 6.5 4.5 2. ) 571 368 188 MIN 0 AC- T 591

DISCHARGE. IN CU81C FEET PER SECOND, HATER YEAR 0 ,TOBER 1969 TO SEPTEM ER 197 DAY OCT NOV DEC JAN FEB MAR AP i MAY JUN JUL 1 1.1 2.1 2.1 2.1 2.7 40 2. 1.6 .0 .48 2 1.0 ?.4 2.1 2.1 3.0 23 2. 1.7 .0 .45 .25 3 1.2 2.7 2.1 2.1 3.0 9.0 3. 1.5 .0 .45 .25 4 1.2 2.7 2.1 2.2 3.0 118 3. 1.7 .0 .45 .25 5 1.3 3.0 2.1 2.4 3.3 43 3. 2.3 .D .45 .23

6 1.4 3.0 2.1 2.2 3.4 15 2. 2.0 .90 .45 .23 7 1.3 2.7 2.1 2.4 3.4 12 2. 2.0 .90 .45 .23 e 1.4 2.4 2.1 2.4 3.4 8.11 2. 2.1 .90 .40 .20 9 1.4 2.1 2.1 13 3.8 5.8 2. 2.4 .90 .40 .20 10 1.4 2.1 2.1 11 5.1 5.8 2. 2.1 .90 .40 .20 11 1.4 2.1 1.9 3.9 6.8 4.9 1. 1.9 .80 .40 12 1.4 1.8 2.2 2.6 3.9 4.1 1. 1.6 .80 .40 13 1.4 1.8 .80 .35 14 1.6 1.6 2.1 2.1 3.8 3.7 I. 1.9 .80 .35 15 .80 .35 16 3.4 1.6 2.4 6.9 2.7 3.4 1. 1.3 .70 .35 17 3.7 1.6 2.4 4.8 2.5 3.4 1. 1.1 .70 .35 18 3.4 1.6 2.6 2.9 2.4 3.0 1. 1.1 .70 .35 19 1.1 .70 .35 20 3.0 1.6 3.0 2.5 2.2 2.9 1. 1.1 .70 .35 21 ! 1.3 .60 .30 22 .60 .30 23 .60 .30 24 3.4 2.1 2.5 3.5 1.6 2.9 1.8 1.1 .60 .30 25 3.4 2.1 2.0 3.1 1.7 3.0 1.8 1..2 .60 .30 26 3.4 2.1 2.1 2.7 1.8 3.0 1.6 1.2 .50 .30 27 3.4 1.8 2.1 2.7 1.9 3.0 1.4 1.2 .50 .30 28 3.0 1.6 2.1 2.7 38 3.0 1.4 1.2 .50 .30 29 2.T 1.6 1.9 2.7 3.0 1.3 1.2 .48 .25 30 2.4 1.8 1.9 2.7 3.0 1.5 1.2 .48 .25 .06 31 .25 .06

TOTAL 71.3 6D.4 71.0 104.1 118.2 348.1 54.2 46.9 22.46 11.13 MEAN 2.30 2.01 2.29 3.36 4.22 11.2 1.81 1.51 .75 .36 MAX 3.7 3.0 3.4 13 38 118 3.0 2.4 1.0 .48 MIN 1.0 1.6 1.9 2.1 1.6 2.7 1.2 1.1 .48 .25 AC-FT 141 120 141 206 234 690 108 93 45 22 CAL YR 1969 TOTAL 10.535.67 MEAN 28.9 MAX 1,650 MIN .09 AC-FT 20,900 SANTA YNEZ RIVER BASIN

11133000 SANTA YNEZ RIVER AT NARROWS, NEAR LOMPOC, CALIF.

DRAINAGE AREA.--789 sq mi. :r 1964 (sta-

ite

EXTREMES.--Maximums and minimums (discharge in ci feet pe cond, gage height in feet) for the water ye 1966-70 are contained in the following table: Minimum Wtr yr Date Discharge G.H. Date Di 1966 Dec. 29, 1965 2,100 a7.94 Long periods 1967 Jan. 25, 1967 16,000 a!2.70 Oct. 1 to Dec. 5, 1966 1968 Mar. 13, 1968 146 4.73 July 27, 28, Aug. 5 to Sept. 30 1969 Jan. 25, 1969 80,000 a24.20 Oct. 1, 1968, to Jan. 17, 1969 1970 Mar. 4, 1970 June 7 to Sept. 30, 1970

From supplementary gage.

REMARKS.--Records good except those for water year 1969, which are poor. No gage-height record Jan. 28 to Feb. 28, Apr. 1 to Sept. 17, 1969. Flow regulated by Jameson Lake, Gibraltar Reservoir, and since November 1952 by Lake Cachuma (see stations 11121000, 11122000, 11125500). Water diverted out of Jameson Lake, Gibral­ tar Reservoir, and Lake Cachuma to cities of Montecito, Santa Barbara, and Goleta for municipal supply. Water pumped from wells along banks of river for irrigation in valley upstream. REVISIONS (WATER YEARS).--(Station 11133500) WSP 981: 1938(M). WSP 1635: 1908, 1914(H), 1927. (Station 11133000) WSP 1928: Drainage area.

DAY CCT NCV DEC JAN FES MAR APR MAY JUN JUL AUG SEP

1 0 54 330 185 45 15 .40 .10 3 0 39 184 125 46 14 9.5 4 C 35 158 109 40 13 9.0 .3 .40 .10 5 0 33 138 105 40 12 8.2

6 C 32 125 142 39 11 7.8 7 0 30 115 128 38 10 7.8 8 C 28 105 1G7 37 10 8.2 9 0 28 96 97 34 10 8.2 13 C 27 88 92 33 10 8.2

11 0 26 82 85 32 13 8.2 12 C 31 77 76 31 20 7.9 13 0 31 73 74 31 18 7.8 14 0 30 70 70 31 18 7.4 15 13 27 65 67 30 IB 7.0 .90 .20

16 299 26 63 63 28 18 6.6 .90 .20 17 420 25 58 59 27 18 6.2 .90 .20 18 595 24 57 56 27 17 19 233 23 56 54 27 17 20 92 24 56 53 26 15

21 50 25 52 52 24 15 22 34 25 50 50 24 15 23 166 24 48 49 24 14 24 56B 22 47 48 23 14 25 387 23 45 47 22 14

26 16B 25 45 46 21 14 27 112 25 62 44 20 12 23 86 28 47 44 19 10 '.9 70 1,430 45 18 10 3^ 60 1,120 721 17 10 31 534 265 15

TOTAL 0 3,353 3,898 3*656 2,275 917 419 188.8 27.30 7.60 .40 MEAN 0 112 126 118 81.3 29.6 14.0 6.09 .91 .25 .013 MAX 0 595 1,430 721 185 48 20 10 1.7 .40 .10 MIN 0 0 22 45 44 15 10 1.7 .40 .10 C AC~FT 0 6,650 7,730 7,250 4,510 1,820 831 374 54 15 .8

CAL YR 1965 TOTAL 9,756.20 MEAN 26.7 MAX 1,430 MIN 0 AC-FT 19,350 WTR YR 1966 TOTAL 14,742.10 MEAN 40.4 MAX 1,430 MIN 0 AC~FT 29,240 SANTA YNEZ RIVER BASIN

11133000 SANTA YNEZ RIVER AT NARROWS, NEAR LOHPOC, CALIF.--CONTINUED

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

1 , 92 272 900 91 21 .3 803 88 20 .0 1. 3 r 56 373 87 318 405 83 19 .8 . 0 4 54 330 87 345 528 79 18 .7 . 0 5 3 52 315 86 587 760 77 17 .5 . 0

6 25 51 30Q 82 600 676 75 17 ^4 . 0 7 74 18 .3 . 0 8 252 .2 . 0 7? 22 .1 . C 10 .0 .90 11 .9 .90

13 40 22 .7 .0 14 31 38 189 2,460 735 348 46 21 .5 .0 15 41 36 169 1,090 780 312 44 20 .2 .0 16 57 770 242 42 19 .2 .0 17 18 ."2.2 .0 19 58 36 138 570 1.01C 173 38 14 .0 23 56 36 129 532 1,280 168 37 12 .2 .C

22 51 ' 297 464 1,690 151 34 8.5 .2 .0 23 51 1,180 114 436 1,980 143 32 7.5 .2 .0 24 56 3,790 111 404 1,860 138 30 6.5 .2 .0 25 6C 8,220 108 373 1,480 130 29 6.0 .2 .0 26 63 1,940 104 345 1,180 124 27 5.5 .0 .0 27 118 26 5.0 .0 .0 28 4.5 .0 .2 29 60 670 283 1,110 107 23 4.0 .0 .2 30 62 635 247- 988 102 22 3.8 .0 .2 31 60 540 252 97 3.5 .0 TOTAL MEAN MAX 1 0 742 8,220 524 2.460 1,980 900 91 22 .3 1.2 MIN 36 96 68 272 97 22 3.5 .0 .90

19,320 MAX 8,220 MIN 0 AC-FT 161.700

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

I .0 .80 .4 7.8 20 19 14 6. 1. .80 .10 2 .0 .80 .5 7.2 20 19 45 5. 1. .60 .1C 3 .0 .80 .6 7.5 20 19 53 4. . 0 .50 .10 4 .0 .80 .6 7i8 21 19 43 2. . 0 .50 .10 5 .0 .BO .6 7.8 21 20 37 ?. 1. .80 0

6 .0 .80 .6 8.2 21 20 31 2. 1.0 .80 0 7 .0 .BC .6 8.8 22 23 27 2. .80 .80 0 8 .0 .80 .6 8.8 22 48 25 1. 1.4 .90 0 9 .2 .80 .6 9.1 22 45 23 1. .90 .80 0 10 .2 .80 .7 9.8 22 49 20 1. .90 .50 0 11 .2 .80 .9 11 22 40 IB 1. .90 .30 0 12 .0 .80 .9 12 23 34 17 2. .90 .20 0 13 .0 .80 .9 11 23 58 16 2. 1.0 .40 0 14 .0 .80 .9 11 24 43 15 1. .90 .30 0 15 .0 .80 .9 12 24 40 27 I. .90 .30 0 16 1.0 .80 .0 12 25 37 58 1. .80 .20 0 17 .90 .80 .0 11 25 37 45 1. .80 .30 3 IB .90 .80 .1 11 26 31 33 I. .80 .20 0 19 .80 .90 .5 11 28 28 27 1. .80 .30 0 2C .80 .90 .7 12 27 25 27 1. .80 .40 0 21 .BO 1.0 .3 12 25 22 27 0 .80 .50 0 22 .80 .90 .5 13 25 20 26 0 .80 .60 o 23 .80 .90 .8 13 24 IB 26 0 .80 .30 0 24 .80 .C .2 13 22 17 25 1. .80 .30 0 25 .80 .0 .4 14 21 16 22 1. .80 .10 0 26 .80 .0 1.6 14 20 15 17 1. .80 .10 0 27 .80 .0 .1 18 19 14 13 1. .80 3 0 28 .80 .0 .3 20 20 13 9.8 1. .80 0 0 29 .80 .C .3 19 19 11 8.5 0 .80 .10 0 30 .80 .2 .6 19 ______11 7.8 0 .80 .10 0 31 .80 .6 20 11 .10 0 12.10 .40 MEAN .93 .87 3 11 12.0 22.5 26.5 26.1 1.75 .89 .39 .013 MAX 1.2 1.2 .6 20 28 58 58 6.6 1.4 .90 .10 MIN .80 .80 .4 7.2 19 11 7.8 .60 .80 0 0, AC-FT 57 52 91 737 1,300 1.630 1,550 107 53 24 .8

AC-FT 5,700 SANTA YNEZ RIVER BASIN

11133000 SANTA YNEZ RIVER AT NARROWS, NEAR LOMPOC, CALIF.--CONTINUED

DAY OCT NOV DEC JUN JUL NIG SE

1 C 1.400 6.600 400 100 55 21 .5 2 0 1,350 6,000 350 140 52 21 .5 3 0 1,300 5,500 31C 160 50 21 .5 4 1,010 4,200 305 ITS 48 21 .5 5 (J 1,320 3,000 310 180 46 21 .5 6 0 3,120 2,000 450 180 44 20 .6 7 0 S,4CO 608 600 185 42 20 .6 a 0 3,370 1,400 720 185 41 20 .6 9 0 2,600 1,500 780 175 40 23 .7 1J 0 2,190 2.500 840 1TO 39 20 .7 11 C 1,860 2.150 800 165 38 20 .8 12 0 1,650 784 760 160 37 20 .9 13 0 '. 14 0 719 340 450 140 35 20 15 0 20 16 0 1,640 837 160 135 33 20 17 0 i.eac ,080 138 130 31 20 . ie 2.0 1,300 ,090 130 125 30 20 ' 19 2C 494 1.97C ,230 120 125 2T 20 0 21 20 BO 22 844 1,480 ,210 115 120 25 20 BO 23 265 4,060 ,2TO 115 115 24 19 70 24 413 70 25 38,000 33,000 ,610 115 100 22 19 60 26 37 SCO 12,500 ,600 115 95 22 IT 60 . 27 22 15 60 28 3 810 8,220 564 105 BO 22 13 50 29 2 240 . 466 100 70 21 12 50 30 1 T60 ----- 454 92 64 21 10 SO 31 I 510 448 58 B.O 50 - TOTAL 0 0 0 MEAN 0 C 0 18.6 l.BT 1.5 MAX 0 0 0 38,000 840 185 55 21 7.0 3. MIN 0 C 0 0 T19 340 92 58 21 B.O .50 .5 AC-FT 0 0 0

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 197S CAY OCT kin " nftf JUL AUG SE I 4. 14 16 13 17 74 15 3.6 .13 2 4. 15 17 13 16 113 14 3.1 .09 3 4. 16 17 13 16 71 14 2.8 .08 4 . 16 17 14 15 126 13 2.9 .08 5 . 17 16 13 15 230 12 2.6 .10 6 25 16 13 15 132 12 2.2 .07 7 24 16 13 15 86 11 1.8 0 8 21 17 13 15 75 10 1.9 0 9 21 IT 19 15 65 9.8 1.8 0 10 20 16 28 18 60 9.3 1.7 0 11 19 15 20 12 IB 15 18 16 46 15 1.3 0 13 18 15 17 16 43 19 1.1 0 14 19 14 16 16 40 20 1.1 0 15 20 15 17 16 38 18 .82 0 16 B. 20 15 24 17 35 15 .65 0 17 8. 18 14 24 19 34 12 .53 0 18 8. IT 14 22 21 32 9.9 .39 0 19 B. 17 14 21 19 29 9.8 .41 0 20 7. 19 14 21 17 29 10 .40 0 21 7. 19 15 18 16 29 8.6 .35 0 22 B. IB 14 17 16 35 T.6 .35 0 23 8. IB 14 17 14 29 T.3 .30 0 24 9. 18 14 IB 14 26 7.9 .IS 0 25 10 18 15 IB 14 24 6.2 .19 0 26 10 1 15 19 14 22 5.9 .29 0 27 11 1 15 19 IT 19 5.2 .30 0 28 12 1 14 19 30 18 5.5 .28 0 29 12 1 13 IB _ ___ IT 5.4 .22 0 30 13 1 13 18 16 3.8 .20 0 31 13 - 13 IT 15 .15

321.3 35.48 .55 0 0 ( MEAN 7.61 18.2 1S.O 17. T 16.7 53.5 10.7 1.14 .018 0 0 ( MAX 13 25 17 28 30 230 20 3.6 .13 0 0 ( MIN 4.2 14 13 13 14 15 3.B .15 0 0 0 ( AC-FT 468 1,060 922 1,090 928 3,290 63T 70 1.1 0 0 ( CAL YR 1969 TOTAL 312.6TB. 10 MEAN 8ST MAX 38 ,000 NIN 0 AC-FT 620,200 WTR YR 19TO TOTAL 4,283. 13 MEAN 11.7 MAX 230 MIN 0 AC-FT 8.500 SANTA YNEZ RIVER BASIN

11134500 SANTA YNEZ RIVER AT 13TH STREET, NEAR LOMPOC, CALIF. LOCATION.--Lat 34°40'06", long 120°28'29", in Lompoc Grant, Santa Barbara County, on right bank at 13th Str crossing, 2.3 miles northwest of Lompoc. DRAINAGE AREA.--820 sq mi. PERIOD OF RECORD.--October 1954 to September 1970. GAGE.--Water-stage recorder. Altitude of gage 60 ft (from topographic map). Prior to Oct. 2, 1954, at vari- ous sites within 300 ft at different datuns EXTREMES.--Maximums and minimums (discharge in cubic feet pe cond, gage height in feet) for the water years 1966-70 are contained in the following table:

Wtr yr Date Discharge G.H. Date Discharge 1966 Dec. 29, 1965 - - Most of time 0 1967 Jan. 25, 1967 15,000 a!5.60 do. 0 1968 Mar. 13, 1968 51 5.03 do. 0 1969 Jan. 25, 1969 79,000 - do. 0 1970 Mar. 4, 1970 273 6.97 do. 0 a From floodmark. Period of record: M discharge, 79,000 cfs Jan. 25, 1969; no flow for several months in each year. REMARKS.--Records good except those for water years 1967, 1969, which are poor. Discharge above wading stages generally not reported herein. Flow regulated by Jameson Lake, Gibraltar Reservoir, and Lake Cachuna (see stations 11121000, 11122000, 11125500). Water diverted out of basin from Jameson Lake, Gibraltar Reservoir, and Lake Cachuna to cities of Montecito, Santa Barbara, and Goleta for municipal supply. Water pumped from wells along bank of river for irrigation in valley upstream. DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

29* 225 178 1*7 131

ICO

22*

9.3 33 5.9 3.* 31 Z.O TOTAL 2,235 MEAN 79. B MAX 1B5 MIN AC-FT SANTA YNEZ RIVER BASIN

11134500 SANTA YNEZ RIVER AT 13TH STREET, NEAR LOMPOC, CALIF.--CONTINUED

2 39 512 89 346 644 77 3 38 373 89 340 348 75 4 37 329 89 375 394 71 I 36 313 86 663 610 69 6 35 298 B2 699 571 70 7 580 32 266 81 540 432 69 a 316 27 252 80 468 368 68 i: 7.2 24 227 88 4B2 335 54 11 .40 24 2D5 80 748 452 50 12 17 24 194 116 1,240 380 48 13 12 24 189 1,880 555 330 45 14 2.2 22 189 2,490 535 300 40 15 4.5 22 169 1,140 580 285 34 16 26 21 164 732 570 216 32 17 32 20 164 664 480 188 31 18 3? 20 148 671 648 178 29

20 33 144 554 1,270 168 26 . 0 21 26 2J 142 .20 23 26 24 34 3, 730 107 333 1,750 130 20

26 16 27 107 16 28 46 914 92 279 1,180 102 15 3d 46 635 248 950 90 11

TDTAL PEAN 0 C 5C.9 MAX 0 C 580 8,230 524 2,490 2,100 853 80 11 MIN a c o 20 92 78 291 85 11 0

151,900 NOTE. DISCHARGE JAN. 23 TO FEB. 21, MAR. 13 TO APR. 12, APR. 18 TO MAY 1 WAS ABOVE WADING STAGES AND WAS PRO­ RATED BETWEEN DISCHARGE FOR STATIONS 11133000 AND 11135000.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

NOV DEC JAN FEB MAR APR MAY JUN JIM.

6.8 5.2 3.4 2.1

2.1 1.6 .10

7.1 3.0 4.B 6.1 3.0 6.8 4.6 2.6 6.6 4.2 2.6 6.8 3.3 1.9 6.6 2.1 2.0 .90

TOTAL 0 C 0 0 67.10 244.50 233.50 0 MEAN 0 0 0 D 2.31 7.89 7.78 0 MAX 0 0 0 0 15 28 24 0 MIN 0 0 000 0 0 0 AC-FT 0 0 0 0 133 485 463 0

148,800 WTR YR 1968 TOTAL 28 MIN 0 AC-FT 1,080 SANTA YNEZ RIVER BASIN

11134500 SANTA YNEZ RIVER AT 13TH STREET, NEAR LOMPOC, CALIF.--CONTINUED DISCHARGF, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

DAY JUN JUL

1 0 1, 2 0 1, 400 6,000 345 135 47 42 3 C 1, 4 0 1. 090 4,209 300 170 43 43 5 0 1. 320 3,000 305 175 41 41

6 0 9, 140 2,000 440 180 41 39 7 0 5, 400 600 590 181 39 37 8 0 3, 370 1,380 715 162 38 36 9 0 2, IT 0 2, 190 2,320 835 170 29 33

11 t 1, 86C 2,200 805 165 27 32 12 0 1, 13 0 1, 410 580 620 155 23 28 14 0 719 330 440 143 22 27 15 0 2, 16 0 1, 64C 17 0 1, 88C ,070 128 125 17 23 18 0 1, SCO ,080 120 120 15 21 19 303 2, 04C ,080 115 120 13 18 20 450 1. 950 .230 110 118 11 15 21 2,000 1, 11C ,250 105 116 9.0 12 22 800 1 , 400 .210 100 115 6.0 9.0 23 17C 4, OCO ,260 98 115 7.5 6.0 24 400 22, 600 ,330 98 110 7.0 2.8 25 37,500 33, 400 .600 94 105 6.0 1.5

26 36,000 12, 60C ,600 85 90 5.0 1.0 27 13,100 10, 200 ,100 85 85 4.0 ' 0 .50 28 3,913 8, 220 560 80 75 3.0 29 2,290 460 75 65 2.0 0 30 1,780 450 70 59 1.0 0 31 445 53 0 TOTAL MEAN 315 128 21.5 WAX 0 0 0 36,000 33, 45 MIN 0000 719 330 70 53 1.0 0 AC-FT 000 202,800 277, 600 107,400 18 ,720 7, 650 1,300 1,320 1,080 000 MIN 0 NOTE. NO GAGE-HEIGHT RECORD JAN. 3 TO FEB. 4 , FEE . 17 TO JULY 29.

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEM6ER 1970 DAY JUN ""

1 0 .87 6.7 155 5.4 2 0 .75 6.4 203 5.0 3 0 .57 6.5 147 4.2 4 o .6-3 6.8 141 2.4 5 0 .87 6.7 201 1.1

6 0 .31 6.6 150 .81 7 0 7.5 6.8 96 C 8 0 12 6.4 73 0 9 0 16 7.2 56 0 U 0 25 8.9 59 0

9.6 9.6 8.4 8.5 7.9 8.2 8.0 7.8 31 0 7.4 6.9

TOTAL 0 06. 1,687.4 MEAN 0 0 54.4 MAX 001 203 MIN 0 0 .31 6.9 AC-FT 0 0 679 3,350

CAL YR 1969 TOTAL 311,045.37 MEAN 652 MAX 38,000 AC-FT 617,000 _WTR YR 1970 TOTAL 2,383.60 MEAN 6.5 MAX 203 AC-FT 4,730- 500 SANTA YNEZ RIVER BASIN

11135000 SANTA YNEZ RIVER AT PINE CANYON, NEAR LOMPOC, CALIF. LOCATION.--Lat 34°40'20", long 120°29'30", in Lompoc Grant, Santa Barbara County, on right bank at Floradale Ave­ nue bridge, 2.1 miles upstream from Santa Lucia Creek and 3 miles northwest of Lompoc. DRAINAGE AREA.--844 sq mi (revised). PERIOD OF RECORD.--May 1940 to October 1946, August 1964 to September 1970. Monthly discharge only for some periods, published in WSP 1315-B. GAGE.--Water-stage recorder. Datum of gage is 40.78 ft [revised) above mean sea . Prior to Aug. 24, 1964, at different datum. Aug. 24, 1964, to Aug. 20, 1970, at datum 0.91 ft lower. EXTREMES.--Maximums and minimums (discharge in cubic feet per nd, gage height in feet) for the water years 1966-70 are contained in the following table: Minimum daily Wtr yr Date. scharge G.H. Date Discharge 1966 Dec. 29, 1965 2,950 9.00 Oct. 30 lo Nov.15,1965,Sept.24,1966 0 1967 Jan. 25, 1967 15,000 16.10 Aug. 5-24, 1967 0 1968 Mar. 13, 1968 131 4.52 Aug. 26, 1968 .02 1969 Jan. 25, 1969 78,000 a24.91 Sept.27, 29, 1969 .07 1970 Mar. 5, 1970 272 5.47 Nov. 29, 30, 1969 0 a From floodmarks, present datum. Period of record: Maximum discharge, 78,000 cfs Jan. 25, 1969 (gage height, 24.91 ft, present datura, from floodmark); no flow at times in some years. REMARKS.--Records good except' those for periods of no gage-height record, which are poor. Flow regulated by Jameson Lake, Gibraltar Reservoir, and Lake Cachuma (see stations 11121000, 11122000, 11125500). Water diverted out of basin from Jameson Lake, Gibraltar Reservoir, and Lake Cachuma to cities of Montecito, Santa Barbara, and Goleta for municipal supply. Water pumped from wells along bank for irrigation in valley upstream.

DISCHARGE, IN CUBIC FEET PER SFCOND, MATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV

| .2 C 42 33 190 2 4.8 1.0 1.0 .40 .40 2 .2 0 34 23 166 8 4.9 1.0 .80 .40 .40 3 .2 0 29 18 125 3 3.9 1.0 .60 .40 .40 4 .2 0 26 15 113 0 3.9 l.C .60 .40 .40 5 .2 0 24 13 109 B 3.5 1.0 .80 .40 .40 6 .3 C 22 12 153 7 3.2 1.1 .80 .30 .50 7 .< 0 20 1C 139 6 2.9 1.1 .70 .30 .50 8 .4 C 18 9 117 3 3.1 1.2 .70 .3C .50 9 .3 C IB 8 102 1 3.0 1.0 .70 .40 .50 Iv; .3 0 17 8 96 0 2.B .90 .70 .40 .50 11 .6 0 16 7 91 9 2.9 1.0 .70 .40 .50 12 .6 C .22 6 85 7 9.2'4.2 .90 .60 .40 .60 13 .7 0 21 6 80 6 1.0 .90 .30 .90 1* .7 0 21 5 77 5 11 1.0 .20 .30 .0 15 .8 0 19 5 73 4 9.0 .90 .50 .30 .1 16 .6 177 17 5 70 I 9.2 .90 .50 .30 .2 17 .6 573 16 4 67 9 B.6 .90 .40 .30 .3 18 .1 673 14 4 65 B 7.1 .60 .50 .30 .3 19 .0 214 13 4 62 T 5.6 .BO .60 .4C .5 20 .0 64 13 4 59 5 4.9 1.1 .60 .30 .4 21 .1 27 15 4 58 4 3.8 B .50 .30 .5 22 .2 16 14 4 55 3 3.6 0 . .40 .30 .6 23 .0 124 13 3 53 2 3.1 . .60 .40 .1 24 .9 564 12 3 51 1 2.6 . .60 .40 0 25 .2 487 14 3 4B 9.B 2.1 0 .60 .30 .10 26 .30 1BB 13 3 47 B.4 1.7 0 1. .50 .2C .50 27 .2 1C8 13 5 43 7.9 1.7 I . 0 .60 .30 .70 28 .5 72 13 4 42 7.8 1.6 90 . 0 .60 .30 .60 29 .4 55 1,450 3 7.3 1.6 80 .80 .60 .30 .60 30 47 31 492 28 5.1 1 1 .50 .40

MEAN .10 113 114 10 87.0 2.6 4.37 1 10 1.00 .61 .34 .75 MAX 4.2 673 1,450 63 190 48 11 .5 1.3 1.0 .40 1.6 MIN 0 0 12 3 42 5.1 1.5 80 .80 .20 .20 0 260 68 60 37 21 45 SANTA YNEZ RIVER BASIN

11135000 SANTA YNEZ RIVER AT PINE CANYON, NEAR LOMPOC, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

SEP

.63

.90 373 368 3BB .48 .90 329 405 451 .60 .90 313 739 720 1.1

.92 7 .60 12 580 32 6.3 0 1.1 8 .60 8.8 307 27 252 BS 539 402 62 5.9 0 1.3 9 .60 64 24 229 81 511 358 57 5.6 0 1.2 I! .60 12 23 227 98 538 368 53 4.9 0 1.3 11 .60 13 23 205 98 782 510 48 5.2 0 1.6 12 .70 15 23 7 ' 0 0 1.3 13 .70 15 22 189 1.8BO 558 364 45 0 1.3 14 .7C 10 24 IB9 2,510 549 321 41 6.5 0 1.3 15 .60 15 21 169 1,180 629 307 39 6.2 0 1.2 16 .60 22 21 164 773 642 221 36 6.1 0 1.2 17 .70 29 19 164 697 527 177 34 5.7 0 1.0 18 . 0 27 18 148 713 64B 162 32 4.9 0 .5 19 . 0 29 18 146 694 991 151 29 4.2 0 .2 20 . 3 31 17 144 576 1,270 141 28 2.8 0 .3 21 . 0 26 17 142 464 1,300 137 27 2.6 0 .3 22 . 0 26 2.3 0 .4 23 . 0 26 1,153 134 351 2,230 112 23 2.0 0 .4 24 . 0 . 30 4,300 126 333 1,750 100 21 2.4 0 .4 25 9 36 B.230 125 321 1.380 94 20 2.0 .02 1.7 26 .60 39 1,940 11\ 307 1,070 94 17 1.9 .38 1.7 27 90 15 1.8 .39 1.7 28 .60 41 914 98 279 1,180 86 14 1.7 .64 3.5 29 .60 4C 670 261 1,030 83 13 1.3 .69 2.5 3u .60 42 635 _____ 248 950 81 12 1.0 .62 .84 31 .70 ,. 540 274 78 1.6 .56

MEAN .58 2.C8 54.0 666 215 441 861 301 40.4 4.87 .28 1.32 MAX .70 12 580 11 1.5 3.5 MIN .40 .70 1.4 17 98 81 291 78 12 1.0 0 .48 300 17 78 CAL VR 1966 TOTAL 8,519.40 MEAN 23.3 MAX 639 MIN 0 AC-FT 16,900

NOTE NO GAGE-HEIGHT RECORD JAN 25 TO FEB. 21.

DISCHARGE, IN CUE 1C FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 OAV OCT NOV DEC JUL AUG 1 1.2 1.7 5.1 2.2 2.6 2.5 1.9 .69 .4 .29 .07 2 .2 .45 .07 3 1.6 1.7 2.3 2.3 2.3 2.5 16 .68 .4 .29 .17 4 1.2 1.6 2.4 2.4 2.2 2.6 16 .61 .4 .30 .11 5 1.3 1.6 3.8 2.5 2.4 2.6 11 .55 .3 .13 .06 6 .21 .12 7 1.4 1.9 2.5 2.4 2.4 4.5 5.7 .67 1.1 .19 .15 8 1.3 1.8 2.0 2.7 2.3 27 4.8 .61 .98 .23 .12 9 1.6 1.6 1.9 2.3 2.4 22 3.2 .62 .83 .46 .11 10 1.6 1.6 1.8 2.4 2.4 22 1.9 .91 .80 .48 .11 11 1.5 1.5 2.0 2.6 2.3 19 .53 .72 .91 .46 .17 12 1.6 1.3 2.1 2.4 .55 13 .21 .77 .80 .30 .08 13 1.6 1.5 2.0 2.2 .68 51 .31 .1 .68 .30 .22 14 1.6 1.4 2.0 2.3 .59 34 .34 .2 .50 .16 .13 15 1.4 1.3 2.2 2.7 1.1 22 .34 .1 .37 .09 .15 16 1.7 1.2 2.3 2.6 1.4 20 12 .1 .26 .24 .20 17 1.4 1.2 2.1 2.6 18 17 16 .1 .17 .22 .23 18 1.4 3.1 15 2.4 6.7 14 11 .3 .30 .IB .12 19 1.5 7.9 8.1 2.4 6.1 10 7.2 .3 .31 .13 .10 20 1.6 5.3 3.7 2.5 5.3 6.2 6.1 .4 .32 .13 .24 21 .4 .33 .08 .15 22 1.3 2.6 2.5 3.5 4.4 5.8 4.9 .4 .35 .04 .11 23 1.5 1.9 2.3 2.5 4.2 4.8 5.0 .6 .22 .14 .11 24 .5 .29 .14 .11 25 .40 .08 .07 26 .2 .36 .06 .02 27 2.0 2.0 2.5 11 2.2 1.9 1.1 .6 .42 .08 .13 28 1.9 3.8 2.4 3.7 2.4 1.9 .98 .6 .54 .07 .12 29 .6 .48 .05 .16 30 1.8 17 2.1 2.9 _____ 1.9 .91 .4 .42 .16 .08 31 1.7 2.1 8.0 .... 1.9 .5 -_ .13 .14

7.87 MEAN 1.54 2.86 3.00 3.02 3.31 11.0 5.20 1.10 .66 .20 .13 .26 MAX 2.6 17 15 11 18 51 16 1.6 1.4 .48 .24 .44 MIN 1.1 1.2 1.8 2.2 .55 1.9 .21 .55 .17 .04 .02 AC-FT 95 170 185 185 190 675 309 68 40 12 7.8 NIN 0 AC-FT 154,200 WTR VR SANTA YNEZ RIVER BASIN

11133000 SANTA YNEZ RIVER AT PINE CANYON, NEAR LOMPOC, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

DAY OCT NOV 1 .38 .67 .42 1.0 5 2 .52 .69 .44 1.0 2 * .32 3.1 .64 1.0 23 81 4 .35 2.1 .76 1.0 1,100 4,200 295 150 38 25 81 5 .32 .97 .61 1.0 1,320 3,000 300 150 38 37 6C

6 .36 .65 .55 1.0 9,180 2,000 435 150 38 40 47 7 .44 .52 .* > 1.0 5,4?0 590 580 150 37 41 40 8 .57 .43 .51 1.0 3.380 1,370 710 150 35 37 54 9 .29 .45 .45 1.0 31 46 13 .32 .42 .60 1.0 2,190 2,300 830 150 27 28 46 11 .38 .25 3.2 1.0 1,860 2,180 810 150 26 27 59 12 .25 .67 .97 1.0 66 13 1.5 .57 .82 . 1.0 1,410 580 615 140 22 24 63 14 30 .53 3.4 1.0 719 320 435 136 21 22 74 15 4.5 9.1 2.4 1.0 2,220 62$ 285 135 20 21 84 2. 16 1.6 3.3 1.0 1,640 825 145 128 18 18 95 3. 17 1.4 .99 1.2 1.0 1.880 1,060 125 122 16 15 1 2. 18 1.4 .76 .85 2.0 1,800 1,070 118 118 14 12 3 2. 19 .98 .86 .85 31. 2,050 1,070 112 118 12 9.5 4 1. 20 8.1 6 1. 21 .80 .56 1.3 103 105 9. 6.6 8 22 .87 .52 .82 810 1,420 1.210 101 105 9. 5.1 6 23 .88 24 .59 .59 1.3 410 23,000 1.320 100 105 8. 2.3 a 25 .45 .50 4.6 ' 37,900 33,800 1,590 96 100 6. 2.4 a 26 .44 .66 9.9 38.40C 12.700 1,600 87 85 5. 1.8 7 27 1,110 85 80 3. 1.6 7 28 82 70 3. 2.1 8 29 .84 .38 1.2 2,340 460 77 60 2. 2.1 8 30 5.5 .45 .96 1,800 450 75 54 1. 1.9 5 31 1.1

MEAN 312 117 20. 16.6 1 .14 1. MAX 30 9.1 9.9 38,400 33,800 6,600 830 160 4 41 1.8 3 MIN .25 .25 .42 1.0 719 320 75 48 1. 1.6 40 AC-FT 119 62 104 205,400 279.800 107,100 18,580 7,200 1,220 1,020 70

NOTE NO GAG -HEIGHT RECORD JAN. 6 TO JULY 3.

DISCHARGE. IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO >EP TEMBER 1970 __ RAY OCT JU N JUL SUE S

1 1.7 2.7 .8 11 160 6.6 .0 .90 88 2 1.7 .8 .8 10 ZIO . 6.3 .8 .90 .88 3 1.7 .5 .8 9.6 150 5.6 .7 .90 .88 4 1.7 .7 .6 10 150 4.4 .6 .90 .88 5 1.7 .0 2! 6 11 200 3.1 .5 .90 .88

6 1.7 2.7 11 150 2.7 .4 .90 84 7 1.7 .5 4.0 11 100 2.7 .4 .90 .80 a 1.8 .3 2. 3.9 13 80 2.6 .5 .90 . a 9 1.8 4.7 2. 20 12 49 2.6 .5 .90 6 10 1.8 4.7 2. 30 14 43 2.6 .6 .90 . 4 38~ 11 1.6 4.6 2. 25 15 2.4 .7 .90 2 12 1.6 4.1 2. 20 14 34 2.3 .7 .90 . 0 13 1.9 4.4 2. 15 13 31 6.5 .8 .90 a 14 1.7 3.9 2. 14 12 28 15 .8 .84 6 15 1.7 3.7 2. 15 12 26 15 .9 .82 , . 6 16 2.0 3.7 2. 30 10 24 13 .9 .82 6 17 1.9 4.1 2. 25 10 21 9.2 .8 .80 18 1.8 3.5 2. 20 a. 20 6.5 .8 .80 19 1.7 3.6 18 7. 19 5.1 .7 .7-8 20 1.9 3.8 16 7. 19 4.8 .7 .78 21 1.8 4.3 15 6. 18 4.0 .6 .76 22 1.9 4.1 15 5. 29 3.7 .6 .74 23 1.9 3.9 15 5. 26 3.5 .6 .72 24 2.0 4.4 16 6. 21 3.3 .6 .72 25 1.9 4.1 14 5. 19 3.1 .6 .72 26 1.8 1.6 12 5. 17 2.9 .6 .0 .72 27 2.1 .03 12 5. 14 2.7 .5 .9 0 .74 28 1.9 .13 11 87 11 2.5 .5 .<) 0 .76 29 2.8 0 2 a 11 10 2.3 .5 .9 0 .78 30 2.4 0 11 9.6 2.2 .5 .9 0 .82 31 2.5 2. 11 7.9 .5 .86 TOTAL 58.1 110.86 76. 410.2 346.8 1,734.5 149.2 5( .9 4. .20 25.68 3 70 5 MEAN 1.87 3.70 2.4 13.2 12.4 56.0 4.97 1. 64 .4 4 .83 05 1 MAX 2.8 10 4. 30 87 210 15 .0 1. 7 .90 .5 MIN .90 .72 66 AC-FT 115 220 152 814 688 3,449 296 101 a 6 51 65 1

NOTE. NO GAGE-HEIGHT RECORD APR. 22 TO AUG. 20. SAN ANTONIO CREEK BASIN

11136100 SAN ANTONIO CREEK NEAR CASMALIA, CALIF. LOCATION. --Lat 34°46'S6", long 120°31'47", in Jesus Maria Grant, Santa Barbara County, on Camp Cook Military Res­ ervation on downstream side of left center pile bent of San Antonio Road bridge, 0.7 mile east of junction of San Antonio Road with Lompoc-Casmalia Road and 3.8 miles south of Casmalia. DRAINAGE AREA.--13S sq mi. PERIOD OF RECORD. --October 1 September 1970. GAGE. --Water-stage recorder. Con rete ntrol since August 1970. Altitude of gage is 160 ft (from topographic map). Prior to June 27, 1958, m 2.00 ft higher. AVERAGE DISCHARGE. --IS years, 5.93 cfs (4,300 acre-ft per year); median of yearly me discharges, 2.9 cfs (2,100 acre-ft per year). EXTREMES.--Maximu ums (discharge in cubic feet per second, gage height in feet). scharge (*) and peak discharges above base (50 cfs), water years 1966-70 Time Disch. G.H. Date Time Disch. U.H. Nov. 24, 1965 0100 52 3.70 Mar.. 13, 1968 1000 *32 3.72 Feb. 19, 1969 1900 242 5.28 Dec. 29, 1965 1300 63 3.76 Feb. 25, 1969 0100 *2,300 11.79 Jan. 30, 1966 1500 *2S7 5.38 Jan.. 20, 1969 0015 154 4.96 Apr . 5 , 1969 2015 109 4.29 Jan.. 25, 1969 1300 967 8.29 Jan. 24, 1967 1900 *149 4.96 Feb.. 6, 1969 1800 308 5.54 Feb. 28, 1970 081S *131 5.24 Annual minii;num daily di scharj;e, water years 1966-70

Wtr yr Date Discharge'.20 Wtr yr Date Di scharge 1966 Aug. 17-20, Sept 3, 1966 1969 Oct. 2 , 1968 .36 1967 Oct. 2, S-9, 19 , 20, 1966 .40 1970 July 21 , 1970 .42 1968 Aug. 27, 1968 .24 Period of record: Maximum discharge, 2,300 cfs Feb. 25, 1969 (gage height, 11.79 ft) .nimum daily, 0.10 cfs June 19, 20, 1957. REMARKS. --Records good. No gage-height record Dec. 16, 1969, to Feb. 18, 1970. reguli tion above station. Flow affected by pumping from wells along stream for irrigation above statio REVISIONS. --WSP 1928: Drainage area.

OISCHARGEt IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FES MAR APR MAY JUN JUL AUG SEP

1 .70 .50 2. 18 14 .4 3.1 1.2 .80 .50 .40 .40 2 .60 .50 2. B.8 15 .0 3.1 1.2 .90 .50 .40 .40 3 .9 3.1 1.2 1.0 .50 .3C .20 4 .70 .50 2. 5.6 8.0 .3 3.1 1.2 .90 .50 .40 .50 5 .50 .50 2. 5.0 10 .0 3.0 1.2 .90 .50 .50 .40

6 .40 . 5C 2. 4.B 19 .0 3.0 1.2 .90 .50 .40 .SO 7 .60 .60 2. 4.5 13 .8 3.0 1.2 .90 .50 .40 .40 8 .60 .60 2. 4.4 8.7 .8 2.9 1.2 .80 .50 .50 .40 9 .70 .60 2. 4.2 7.4 .6 2.8 1.2 .80 .50 .40 .40 13 .70 .60 2. 4.2 6.6 . 5 2.B 1.2 .80 .40 .40 .40

11 .60 .6C 2. 3.9 6.3 .8 3.0 1.1 .8C .40 .30 .50 12 .70 .60 3. 3.7 5.9 .9 3.0 1.1 .70 .40 .30 .50 13 .70 .70 3. 3.6 5.B .8 3.1 1.1 .70 .50 .30 .40 .70 1.1 .70 .40 .4C .40 15 .60 .80 .40 .40 .30

16 .60 5.1 2. 3.4 5.4 .1 .90 1.1 .BO .40 .30 .30 17 .60 6.9 2. 3.3 5.2 .0 .90 1.1 .80 .40 .20 .30 IB .60 6.6 2. 3.3 5.2 . g 1.6 1.1 .70 .40 .20 .30 19 .60 1.1 .70 .40 .20 .50 23 .50 1.9 2.4 3.5 5.1 3.0 2.2 1.1 .60 .40 .20 .50

21 .50 1.5 2.5 2.9 5.1 2.9 1.4 1.0 .60 .40 .40 .40 22 .50 .60 .40 .40 .30 23 .40 1.0 .50 .40 .40 .30 24 .40 23 .50 .40 .30 .30 25 .40 18 .60 .40 .30 .so

26 .30 8.4 3.4 3.2 4.7 3. .3 1.0 .50 .40 .40 .50 27 .40 4.7 3.0 3.B 4.6 3. .3 1.0 .40 .60 .40 .40 28 .40 3.3 2.9 3.7 4.5 3. .3 1.0 .50 .50 .40 .40 29 .40 2.7 46 3.5 3 . .3 1.0 .50 .30 .50 .40 30 .40 2.4 35 44 3 .2 .90 .60 .40 .40 .80 31 .40 30 24 3. " .90 . .30 .30

TOTAL MEAN .55 3.56 5.86 6.45 7.30 3.5 2.18 1.09 .71 .44 .36 .41 MAX .70 23 46 44 19 5. 3.1 1.2 1.0 .60 .50 .80 MIN .30 .50 2.1 2.9 4.5 2. .90 .90 .40 .30 .20 .20 27 22 24

CAL YR 1965 TOTAL 1,058.90 MEAN 2.90 MAX 50 MIN 0 AC-FT 2 ,100 WTR VR 1966 TOTAL 975.80 MEAN 2.67 MAX 46 MIN .20 AC-FT 1 ,940 SAN ANTONIO CREEK BASIN

11136100 SAN ANTONIO CREEK NEAR CASMALIA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND. MATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

I .80 .50 .91 .SB .65 2 .40 .50 .90 .58 . 5 3 .60 .60 8.4 2.5 4.8 3.2 4.5 2.4 1.8 .91 .61 . 2 4 .50 .60 .92 .59 . 3 5 .40 .60 2.6 2.5 4.4 3.7 7.9 2.1 1.3 .90 .56 . 3 6 .40 .7C 12 2.5 4.3 3.2 5.1 .9 .88 .57 . 5 7 .40 1.4 10 2.4 4.1 3.2 20 ..8 .81 .61 . 5 a .40 1.9 4.4 2.4 4.0 3.1 11 .7 .78 .60 . 5 9 .40 1.5 3.2 2.4 .0 3.1 6.3 .8 .77 .61 . 3 10 .50 .90 2.8 2.4 .9 3.0 4.B .6 . .74 .63 . 2 11 .50 .90 2.4 2.4 .0 3.1 19 .4 . .73 .61 . 8 12 .50 .80 2.3 2.4 .9 5.6 13 .1 .69 .59 . 7 13 .50 .90 2.3 2.4 .9 7.4 7.1 .8 .68 .57 .72 14 .50 .70 2.4 2.2 .9 5.7 5.6 .7 .66 .62 .78 15 .50 .80 2.4 2.1 .8 4.3 4.8 .6 .67 .60 .85

16 .50 .80 2.0 2.2 3.7 8.6 5.2 .6 .67 .56 .85 17 .50 .90 2.2 2.3 3.5 11 4.5 .4 .69 .60 .81 18 .50 .90 2.3 2.2 3.5 5.5 9.6 .3 .66 .57 .83 19 .40 .90 2.3 2.2 3.6 4.0 18 .4 .65 .57 .80 2C .40 1.3 2.3 2.3 3.5 3.5 15 .4 .65 .56 .73

21 .50 1.4 2.5 2.4 3.4 3.2 13 .4 .62 .58 .75 22 .50 1.3 2.5 22 3.4 3.0 22 .3 .61 .59 1.0 23 .50 1.5 2.4 12 3.4 2.9 12 .3 .62 .60 .79 24 .50 1.2 2.5 62 3.3 29 .3 .61 .61 .77 5.4' 2.7 25 .50 1.2 2.6 29 2.6 12 .3 .56 .60 .83

26 .50 1.1 2.6 12 5.D 2.4 6.7 .2 .99 .57 .62 .81 27 .50 .2 .96 .58 .6$ .80 28 .60 1.1 .61 .67 .80 29 .50 1.3 2.5 5.2 2.3 3.6 .2 .97 .60 .65 .87 3C 31 .50 2.5 11 5.4 1.2 .58 .64 101.1 115.2 123.1 269.8 52.6 37.62 21.84 22.50 MEAN .49 1.01 3.26 7.15 4.11 3.97 9.66 1.7C 1.26 .70 '. 60 .75 MAX .80 1.9 12 62 7.0 11 29 2.9 2.7 .92 .67 1.0 MIN .40 .50 1.2 2.1 3.3 2.3 3.2 1.2 .93 .56 .56 .62 229

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 DAY OCT NOV 0 JUN JUL AUG SEP 1 .64 1. 1.5 2.6 2.3 2. 1.0 .71 .53 .48 .31 2 .85 .61 I. 1.5 2.3 2.3 7. 1.0 .69 .59 .50 .31 3 .83 .57 1. 1.5 2.1 2.2 4. .99 .71 .58 .51 .38 4 .88 .58 5 1.5 2.1 2.2 2. .98 .70 .53 .46 .36 5 .81 .58 2 1.6 2.0 2.1 2. .94 .66 .52 .50 .39 6 .76 .60 1. 1.5 2.1 2.1 2. .97 . 7 .52 .46 .34 7 .79 .70 1. 1.5 2.1 3.0 2. .96 . 5 .50 .46 .29 8 .60 .59 1. 1.6 2.2 10 1. .95 . 4 .50 .47 .31 9 .72 .56 1. 1.6 2.2 5.1 1. 1.0 . 8 .71 .44 .31 10 .69 .65 8 1.8 2.3 3.2 1. .92 . 5 .52 .44 .36 11 .73 .67 1. 2.4 2.3 2.7 1. .89 . 1 .52 .44 .36 12 .72 .61 1. 2.2 2.5 2.3 1. .93 . 5 .55 .44 .36 13 .82 .64 I. 2.0 3.2 16 1. .94 . 3 .52 .46 .38 14 .73 .65 1. 2.0 3.7 7.5 1. 1.0 . 7 .54 .48 .35 15 .68 .68 1. 2.0 3.C 3.6 1. 1.0 .64 .53 .40 .32

16 .66 .63 1. 1.9 2.7 3.3 1. 1.0 .57 .53 .46 .30 17 .74 .59 1. 1.9 6.0 4.4 1. .97 .61 .50 .42 .36 18 .62 .68 2. 1.7 4.6 3.3 1. .97 .64 .50 .40 .37 19 .64 .96 3. 1.7 3.1 2.7 1. .93 .63 .48 .42 .42 20 1.1 1.3 2. 1.8 2.6 2.4 1. .93 .56 .49 .47 .42

21 .70 1.6 1. 1.7 2.6 2.2 1. .91 .62 .51 .36 .42 22 .70 1.5 1. 1.7 2.4 2.1 1. .89 .58 .49 .36 .36 23 .72 1.0 1. 1.7 2.4 2.1 1. .84 .56 .53 .34 .35 24 .70 .86 1. 1.7 2.3 2.0 1. .80 .58 .54 .31 .33 25 .82 .83 1. l.B 2.3 2.0 1. .79 .60 .SI .29 .36 26 .72 .82 1. 1.8 2.1 1.9 1. .76 .62 .51 .29 .40 27 .76 .80 1. 2.1 2.3 1.9 1. .76 .63 .52 .24 .41 28 .69 .74 1. 2.7 2.4 1.9 1. .70 .57 .50 .34 .42 29 .69 .76 1. 2.2 2.4 1.8 1. .68 .56 .49 .37 .47 30 .64 2.4 1. 2.1 1.8 . 9 .67 .54 .48 .33 .49 31 .63 1. 3.2 1.9 - .72 .47 .36

.63 .52 .41 .37 MAX 1.1 .78 .71 .51 .49 MIN AC-FT 46 49 )8 115 153 207 1C 4 55 38 32 25 22

MTR YR 1968 TOTAL 470.30 MEAN 1.29 MAX 16 MIN .24 AC-FT SAN ANTONIO CREEK BASIN

11136100 SAN ANTONIO CREEK NEAR CASMALIA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

NOV DEC JAN FEB MAR APR MAY JUN JUL l" .40 .62 .75 1.6 15 167 5.3 .7 . 1. .86 .75 2 .36 .80 .76 1.6 12 109 5.6 .7 1. .82 .80 3 .40 1.2 .76 1.6 10 71 11 .6 . 1. .80 . 2 4 .39 .80 .79 1.7 8.0 53 6.7 .5 . 1. .84 . 0 5 .42 .70 .78 1.7 33 42 31 .5 1. .87 . 3 6 .40 .70 .87 1.8 216 33 33 .4 1. .92 . 2 7 .41 .70 .72 1.8 96 29 8.8 .4 . 1 . .91 . 8 8 .45 0 .81 1.9 44 24 8.0 .3 1. .88 .9 9 .45 0 .84 1.9 29 20 7.0 .3 > I . .76 . 1 10 .43 0 .97 2.0 22 24 5.4 .2 1. .77 . 8 11 .44 0 .5 2.0 19 19 4.7 .1 1. .83 .95 12 .45 0 .3 2.0 33 14 3.9 .1 0 .85 .92 13 .58 o .1 2.4 25 13 3.5 .0 1 .93 .90 14 1.3 0 .5 5.7 17 11 3.1 .0 . 3 .84 .96 15 .85 2. .3 4.0 28 9.3 2.9 .9 1. .80 l.C 16 .66 1. .4 3.1 30 8.1 2.6* .9 !. .83 1.1 17 .48 0 .7 2.7 16 7.6 2.7 .8 1. .86 1.1 18 .44 c .4 7.1 33 7.3 2.8 .8 1. .91 1.0 19 .44 5 .3 42 147 7.2 2.8 .9 . 3 .78 .90 20 .43 0 .5 58 97 7.1 2.9 .0 .89 .87 .88 21 .44 8 .3 56 33 8.2 3.0 .1 .90 .84 .88 22 .45 6 .2 24 204 8.8 3.1 .1 .92 .90 .88 23 .44 6 .2 11 417 7.2 3.1 .2 .95 .79 .88 24 .42 4 .3 26 616 6.6 3.2 .0 .93 .75 .88 .8 .93 .74 .88 26 .41 2 .8 503 371 6.4 3.0 .6 .89 .79 .90 27 .42 T .7 180 230 6.1 2.9 .5 .88 .90 .90 .5 .91 .91 .88 29 .50 g .0 72 5.8 2.8 .5 .96 .90 .84 3J .55 .71 .8 40 5.4 2.8 .5 .95 .77 .80 31 .62 .5

MEAN .49 .78 1.45 58.1 150 24.1 6.12 2 05 1 L 1.01 .84 .90 HIN .36 .62 .72 1.6 8.0 5.4 2.6 .5 .88 .74 .72

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 1979 DAY OCT 1 .80 .82 1.3 .ft 2. 56 2.3 .4 .79 .61 .46 .49 2 .90 .81 1.3 .6 2. 16 2.2 .3 .78 .53 .46 .50 3 .90 .83 1.3 .7 2. 6.9 2.3 .2 .77 .52 .45 .49 4 .90 .79 1.3 .8 2. 39 2.2 .3 .79 .50 .47 .50 5 .90 .81 1.3 .0 2. 22 2.1 .3 .79 .50 .46 .51 6 .90 2.3 1.3 .9 2. 7.7 2.1 .2 .83 .53 .46 .50 7 .90 2.9 1.4 .8 2. 5.4 2.1 .2 .78 .57 .46 .48 8 .46 .48 9 .0 1.4 1.6 .9 2. 3.7 1.9 .2 .78 .52 .48 .50 10 .0 1.4 1.5 .0 4. 3.6 1.9 .2 .74 .54 .46 .49 11 .0 1.3 1.5 .0 3. 3.5 1.8 .2 .73 .51 .46 .49 12 .0 1.3 1.5 .4 3. 3.5 1.7 .1 .72 .52 .50 .50 13 .0 1.2 1.5 .0 3. 3.5 1.6 .2 .72 .53 .50 .51 14 . .0 1.2 1.4 .6 3. 3.6 1.6 .1 .71 .53 .50 .50 15 .0 1.3 1.6 .4 3. 3.5 1.6 .0 .70 .54 .50 .50 16 1.0 1.2 1.6 .2 3.0 3.3 1.7 .91 .76 .52 .48 .50 17 .49 .50 IB .93 1.1 1.6 .9 2.9 3.1 1.7 .92 .75 .46 .49 .49 19 .92 1.1 1.6 .8 2.8 2.9 1.6 .96 .69 .44 .50 .48 2C .80 1.2 1.6 .8 2.9 2.8 1.6 .92 .69 .45 .51 .49 21 .99 1.4 1.6 .7 2.8 2.8 1.5 .90 .74 .42 .51 .48 22 .92 1.1 1.6 .7 2.8 2.7 1.5 .87 .73 .46 .51 .48 23 .88 1.1 1.6 .7 2.8 2.9 1.4 .96 .70 .45 .52 .47 24 .86 1.1 1.6 .6 2.8 2.8 1.4 .98 .70 .48 .52 .48 25 .80 .54 .49 26 .78 .49 .49 27 .79 1.1 1.6 .6 2.6 2.9 1.5 1.0 .72 .50 .48 .46 28 .75 1.1 1.6 .5 60 2.6 1.3 .91 .64 .49 .48 .46 29 .79 1.1 1.6 .5 2.5 1.4 .85 .65 .47 .48 .47 30 .87 1.2 1.6 .5 2.5 1.5 l.l .60 .45 .48 .47 31 .78 - « 1.6 .48 TOTAL 28.06 37.56 46.9 8 .8 135.0 227.4 52.1 33.17 21.94 15.47 15.04 14.65 MEAN MAX 1.0 2.9 1.6 .0 60 56 2.3 1.4 .83 .61 .54 .51 MIN .75 .79 1.3 .6 2.3 2.4 1.3 .81 .60 .42 .45 .46 30 29 SAN ANTONIO CREEK BASIN

11136150 SAN ANTONIO CREEK TRIBUTARY NEAR CASMALIA, CALIF. County, on right

DRAINAGE AREA.--0.28 sq mi. PERIOD OF RECORD. GAGE. --Water-stag e recorder and crest-stage gage. Altitude of gage is 480 ft (from topographic map) . Sept. 18, 1959, to Aug. 20, 1964, crest-stage gage only at present site and da AVERAGE DISCHARGE .--7 years, 0.0008 cfs CO. 6 acre-ft per year). EXTREMES. --Maximuras and minimums (discharge in cubic feet per second, g age height i n feet) for the wat er years 1966-70 are co ntained in the following table: Maximum Minimum Wtr yr Date Discharge G.H. Dat Discharge 1966 Nov. 9, 1965 7.3 5.78 Mos t of time 0 1967 Jan. 24, 1967 4.3 5.28 do. 0 1968 Mar. 18, 1968 .40 4.67 Ent ire year 0 1969 Feb. 24, 1969 5.0 5.32 Mos t of time 0 1970 Feb. 28, 1970 1.0 4.87 0

by computation of peak flow through culvert; no flow for most of time in each year.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEARS OCTOBER 1965 TO SEPTEMBER 1970

NOV. 15, 1965... .10 JAN. 30, 1966... .20 JAN. 24, 1967... .20 JAN. 25, 1969... .06 1969... .02 FEB. 28, 1970... .04

MONTH CFS-DAYS MAXIMUM MINIMUM MEAN RUNOFF IN ACRE-FEET .10 0 .007 .4 .10 0 .003 .2 .10 0 .0010 .8

.20 0 -.007 .4 .20 0 .0010 1.0 .10 0 .003 .2 .10 0 .003 .2 .20 0 .0010 .8 .20 0 .007 .4 .10 0 .003 .2 .20 0 .0010 'l.O .20 0 .0008 .6 .06 0 .003 .2 .20 0 .007 .4 .20 0 .0008 .6 .20 0 .0008 .6 .04 0 .001 .08 .04 0 .0001 .08 NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. SANTA MARIA RIVER BASIN

111366SO ALISO CANYON CREEK NEAR NEW CUYAMA, CALIF. LOCATION.--Lat 34°S9'00", long 119°46 r 30", in Cuyama Grant, Santa Barbara County, at culvert on State High­ way 166, S.8 miles northwest of New Cuyama. DRAINAGE AREA.--16.1 sq mi. PERIOD OF RECORD.--Annual maximums, water years 1960-63. October 1963 to September 1970. GAGE.--Water-stage recorder with rain-gage attachment. Arch-culvert control since July 25, 1963. Altitude gage is 1,880 ft (from topographic map). Sept. 30, 1959, to July 24, 1963, crest-stage gage at present s at different datum. AVERAGE DISCHARGE.--? years, 0.322 cfs (233 acre-ft per year).

1966-70 a re contained in the followii Maximum Minimum daily Wtr yr Date Discharge G.H. Date Discharge 1966 (a) Entire year 1967 Dec. 6, 1966 208 6.47 Most of time 1968 (a) Entire year 1969 Feb. 24, 1969 552 10.66 Most of time 1970 (a) Entire year a No flow for entire year. Period of record: Maximum discharge, 552 cfs Feb. 24, 1969 (gage height, 10.66 ft), on basis of computa­ tion of flow through culvert; no flow for most of time in each year.

istrict off ice.

DISCHARGE, IN CUBIC EET PER SECOND, WATER YEARS OCTOBER 1965 TO 5 EPTEMBER 1970 DEC. 6, 1966... 53 MAR. 1, 1969 .. 13 MAR. 28, 1969... 2. APR. 2 , 1969... .0 JAN. 25, 1969...

44 0 1.53 93 151 0 15.5 863 13 2.6 5.7£ 356 6.7 1.6 3.03 179 2.0 0 .63 38 151 0 2.13 1 530 CAL YR 1969... 151 0 2.13L 1 530

NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. SANTA MARIA RIVER BASIN

11136800 CUYAMA RIVER BELOW BUCKHORN CANYON, NEAR SANTA MARIA, CALIF. LOCATION.--Lat 35°01'19", long 120°13'39", in SVft; :.14, T.ll N., R.32 W., on San Luis Obispo-Santa Barbara County line, on downstream side of second pier 3m right abutment of bridge on State Highway 166, 0.7 mile

DRAINAGE AREA.--886 sq (revised). PERIOD OF RECORD.--October 1903 to December 1905 (published as Santa Maria River near Santa Maria), October 1959 to September 1970. Monthly discharge only for October 1903 and July 1904 and yearly estimate for water year 1941 Cincomplete), published in WSP 1315-B. GAGE.--Water-stage recorder. Altitude of gage is 760 ft (from topographic map). Prio to October 1959, non- recording gage at different site and datum. AVERAGE DISCHARGE.--13 years, 27.1 cfs (19,630 e-ft pe year); median of yearly mean discharges, 5.0 cfs (3,600 acre-ft per year). EXTREMES, (di scharge in cubic feet pe gage he ight in feet). ximum dischai (*) and peak dis ; (200 c fs). -s 1966-70 Date Time Disch. G,.H. Date Disch. G.H. Dat Time DiDisch. G.H. Nov. 18, 1965 0530 646 5,.50 Apr. 7, 1967 1000 400 5.55 Jan . 22, 1969 0230 44,550 8.82 Nov. 25, 1965 0730 856 5..75 Apr. 11, 1967 1030 330 5.34 Jan . 25, 1969 2330 1515,700 13.00 Dec. 30, 1965 1000 *2,170 6,.90 Apr. 18, 1967 2400 761 6.00 Feb . 6, 1969 1600 11,590 7.33 Apr. 22, 1967 0300 860 6.11 Feb . 25, 1969 0830 *1717,800 13.70 Dec. 6, 1966 1500 *9,680 11,.26 Apr . 5, 1969 (a) Nov. 22, 1967 2030

a Probably less than 250 cfs No flc long per ods in ach year. Period of record: Maxim discharge, 17,800 cfs Feb'. 25, 1969 (gage height, 13.70 ft), from rating cu extended above 4,900 cfs on asis of slope-area measurement at gage height 10.85 ft; no flow at times in years. REMARKS.--Records good except those for 1969, which are i No gage-height record Mar. 14 to July 11, 19 No regulation above station. Pumping from wells along stream f igation in upper Cuyama Valley.

OISCHA

NOV

i a 1.2 5 .0 .9 .6 .80 .20 .19 2 C .80 2 .6 .4 .6 .80 .20 .10 3 0 .70 1 .5 .9 .6 .70 .10 0 4 0 .70 1 .8 . 7 .6 .70 .10 0 5 0 .60 9 .1 5 .6 .60 .10 0 6 C .50 .! .9 B 5 .6 .60 .10 0 7 C' . 50 .0 .5 .5 .6 .60 .20 0 8 0 .50 .8 2 B 3 .8 .60 .20 0 9 0 .40 .6 I ^3 .6 .60 .20 0 U> J .40 . 2 * .3 .8 .60 .20 0 11 C .60 .5 .J B 3 .8 .50 .20 0 2 C .60 .1 .7 . 3 .8 .40 .20 0 3 C .40 .8 .0 , 3 .6 .30 .20 0 4 C .40 .6 .4 .3 .4 .40 .20 0 5 0 .40 * .0 .3 .2 .40 .20 0 6 0 .40 ,4 >4 ^ I .1 .40 .20 0 7 0 .40 .4 f 2 f I .2 .40 .10 0 8 147 .30 B ^ .2 .9 .3 .40 .10 0 9 30 .31 .4 .9 6 .3 .40 .10 0 C 17 .30 * .6 .8 .3 .20 .10 0 1 1C .30 -4 .6 .8 .3 .20 .10 0 2 5.5 .30 , 3 .6 .9 .3 .20 .10 0 3 12 .30 .2 .4 .8 .2 .20 .10 0 4 202 .30 B 2 .2 .9 .1 .20 .10 0 5 226 .39 2 .9 .8 .1 .20 .10 0 6 40 . 30 >2 ^ 9 .6 .2 .20 .10 0 7 9.7 .20 . 1 .7 .6 .3 .20 .10 0 8 3.8 .20 3 .9 .6 .4 .10 .10 0 9 2.4 91 . 0 - .6 .6 .10 .10 0 0 1.6 746 .0 ------.6 .6 .20 .10 0 1 184 . 2 .6

AN 0 23.6 33.3 5 77 5.30 2 13 1 45 1.13 .41 .14 .007 N 0 0 .2C .0 l.B .6 .1 .80 .10 .10 0 -FT 0 1,400 2,053 55 294 31 86 69 24 8.5 .4 TR « [III T§m I'lli'w N!AN 6*u "** ^ T SANTA MARIA RIVER BASIN

11136800 CUYAMA RIVER BELOW BUCKHORN CANYON, NEAR SANTA MARIA, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 NOV DEC JAN FEB MAR APR MAY JUN JUL

0 i 8.9 23 121 1 7. 3.8 J 1.2 '8.58.5. 21 104 1 7. 3.B !} 1C . 18 92 1 6. 3.6 1 4.4 < 8.5 39 82 1 6. 3.3 - 311 8.1 74 76 1 6. 3.3 5 5,290 . 8.1 66 69 1 6. 3.1 fj 2,100 B.I 293 60 1 6. 3.1 0 339 8.1 234 57 17 6. 2.9 0 115 8.1 142 56 17 5. 2.9 .7C 60 8.1 111 56 17 5. 2.7 .AC 38 . 9.8 286 49 18 5. 2.5 3 29 . ?3 200 43 18 4. 2.5 ^ 26 B 41 121 37 18 4 B 2.3 0 21 .8 61 82 32 18 4. 2.3 ^ 19 .8 52 69 27 18 4. 2.1 0 18 .8 44 57 23 18 4. 2.1 16 .8 36 36 21 18 4. 2.1 C 14 .8 26 3C7 19 18 4. 2.1 t; 13 .8 22 660 17 18 4. 2.1 0 12 .8 19 381 16 16 4. 2.1 D 11 .8 18 412 15 15 4. 2.1 0 10 3 16 679 15 14 4. 2.1 v. 13 2 15 516 15 13 4. 2.1 0 9.8 25 14 370 14 12 4. 2.0 i) 9.3 24 13 258 15 11 4". 2.0 J 9.3 9 1 13 2Z6 15 9.3 4. 2.0 0 8.9 5 .8 12 214 15 8.9 4. 2.1 8.5 3 .3 11 196 15 8.1 4. 2.1 0 8.5 2 2.1 0 8.5 4 11 151 16 7.3 3. 2.0 32 16 3. TOTAL 1.1C MEAN C .337 275 3 .6 18.7 18.8 214 39.5 14.9 5.0 2.49 1 MAX J .70 5,290 54 53 61 -679 679 121 18 7. 3.8 MIN 0 o Q .8 9.3 8.1 18 14 7.3 3. 2.0 AC-FT 0 2.2 312

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMI ER 1968 NAY JUN JUL 1 16 .90 4.9 .1 0 1.2 2.5 .70 .30 .10 2 9.3 .90 3.6 .0 8 1.0 4.3 .60 .20 .10 3 5.8 .90 2.9 .5 1.0 4.6 .70 .20 .10 4 1.6 .90 3.1 .5 1.0 3.3 .70 .30 .10 5 1.4 .90 3.H .5 1.0 2.7 .70 .40 .10 6 1.1 .90 3.3 .4 1.0 2.5 .70 .40 .10 7 .90 .90 3.1 .4 2.3 2.3 .70 .40 .10 8 .80 .90 2.9 .4 19 2.0 .70 .40 .10

11136800 CUYAMA RIVER BELOW BUCKHORN CANYON, NEAR SANTA MARIA, CALIF.--CONTINUED

MAY JUN JUL AUG SEP 1 5.5 3.6 2 172 648 92 42 14 11 5.5 3.3 3 154 523 140 42 14 11 5.5 3.3 4 14C 481 100 40 14 10 5.2 3.3 5 3 238 430 160 40 14 10 4.9 3.3 6 D 1,510 358 180 38 14 10 4.9 3.3 7 878 278 100 37 14 10 4.9 3.6 8 422 310 90 35 14 10 4.9 3.8 9 0 32C 278 83 34 15 9.5 4.9 3.6 13 27C

11 0 234 214 78 31 15 9.5 4.9 3.3 12 C 254 189' 76 30 14 9.3 4.9 3.3 13 C 238 172 73 29 14 9.3 4.9 3.3 14 0 196 165 70 29 14 9.3 4.6 3.3 15

16 o 189 155 65 29 14 8. 4.6 3.6 17 29 14 8. 4.6 3.6 18 21C 145 60 29 14 8. 4.6 3.3 19 1. 274 140 58 29 14 8. 4.6 3.3 20 53 25C 135 56 29 14 8~ 4.6 3.3 684 210 129 54 28 13 8. 4.3 3.3 22 1,230 282 120 52 27 13 8. 4.1 3.3 23 4.1 3.3 24 232 3,820 106 50 24 13 7. 4.1 3.1 25 13 7. 3.8 3.1

26 4,650 2,420 102 50 21 12 7. 3.8 3.1 27 900 1,350 100 48 20 12 7. 3.B 3.1 28 400 1,120 100 48 19 12 7.3 3.8 3.1 29 27.4 98 46 17 12 6.9 3 .'8 3.1 30 25C 96 46 16 12 6.5 3.8 2.9 31 - 222 15 6.1 TOTAL 0 MEAN 3 MAX 0 0 C 5,460 9,390 917 180 44 15 12 5.5 3.B MIM 0 0 ) 0 ' 140 94 46 15 12 6.1 3.6 2.9 AC-FT 0 280 198

OIS CHAKSE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TD SEPTEMBER 1973 DAY OCT N JUN JUt AUG SEP

1 2. .3 .1 4.1 4.6 16 3 4.8 3.7 2.3 1.1 .80 .57 2 2. .3 .1 4.1 4.6 " 15 4.7 3.5 1.8 1.1 .74 .56 3 2. .3 .1 4.3 4.5 3.4 1.8 1.1 .76 .56 4 2. .3 .1 4.3 4.3 3.3 1.8 .81 .78 .56 5 2. .3 .1 4.3 4.3 3.3 1.8 .95 .77 .52 6 2. 9 .1 4.3 4.3 3.3 1.9 .99 .71 .49 7 2. .9 .3 4.3 4. 4.3 3.1 1.8 1.1 .68 .49 8 ?. .5 .8 4.3 4.4 3.1 1.8 1.0 .70 .48 1 2. 9 .1 5.2 4.2 3.1 1.9 1.0 .70 . 2 10 2. 3 .1 9.8 7. ; 3.9 3.1 1.9 1.1 .72 . 2 11 2. 1 .8 9.3 8.9 3.9 3.1 1.6 1.1 .69 . 3 12 2. 6 .8 8.9 3.9 3.0 1.7 1.1 .69 . 5 13 2. 6 .8 7.3 1 4.0 2.8 1.7 1.1 .69 . 5 14 2. 8 .6 7.3 j .8 4.1 2.7 1.7 1.1 .70 .46 15 2. 8 .6 7.7 1 .7 4.3 2.6 1.3 1.1 .71 .43 16 3. 8 .8 20 .8 .8 4.5 2.6 1.4 1.3 .69 .43 . 17 4. 3 .8 22 .8 18 4. 1 .8 16 8.9 ).4 4.4 2.8 1.4 1.0 .61 .38 19 3.8 9 .1 13 8.5 i.O 4.3 2.5 1.2 1.0 .62 .39 20 3.6 .7 .3 11 8.5 r.7 4.2 2.5 1.2 .99 .63 .36 21 3.3 2 9 4.3 9.8 8.1 .3 4.1 2.6 1.2 .95 .66 .37 .66 .37 .66 .38 l.l .97 .64 .38 25 3.8 3 .64 .38

26 4.1 3 1 5.2 5.8 7.3 6.3 3.8 2.5 1.2 .94 .65 .32 27 3.8 3 .67 .33 28 3.6 3 1 4.3 5.2 1.1 .80 .64 .33 31 3.3 3,8 4.9 5.3 2.2 .81

TOTAL 98.0 110.5 120.3 244.8 236.7 748.2 124.7 87.4 45.0 30.84 21.16 12.77 MEAN 3.16 3.68 3.88 7.90 8.45 24.1 4.16 2.82 1.50 .99 .68 .43 MAX 4.3 6.9 5.2 22 23 168 4.8 3.7 2.3 1.3 .80 .57 MIN 2.5 2.7 3.1 4.1 4.6 5.3 3.7 2.2 1.1 .80 .60 .31 AC-FT 194 219 2J9 486 469 1,480 247 173 89 61 42 25

3,730 SANTA MARIA RIVER BASIN

11137400 ALAMO CREEK NEAR NIPOMO, CALIF. LOCATION.--Lat 35°02'5S", long 120°18'05", in lluasna Grant, San Lui Obispo County, on right bank 3.2 miles upstream from mouth and 10 miles east of Niporao. DRAINAGE AREA.--83.3 sq mi. PERIOD OF RECORD.--March 19S9 to September 1970. GAGE.--Wa ter- stage recorder. Altitude of gage is 650 ft (from topographic map). Prior to Oct. 1, 1966, a 2.00 ft higher. AVERAGE DISCHARGE. --11 years, 10.2 cfs (7,390 acre-ft per yea r) ; median of yearly mean discharges, zero. feet per second, gage height in fe et). A 1966 -70 Dat Time Disch. G.H. Date Time Disch. G.H. 1966 (a) - Apr. 7, 1967 1200 163 2.35 Jan. 21 1969 1300 2,000 6.IS Apr. 18, 1967 1500 600 3.35 Jan. 25 1969 0900 *9,020 10.51 Dec . 6, 1966 1400 *8,500 10.30 Feb. 6 1969 0100 1,110 6.10 Jan 24, 1967 1600 330 3.03 Mar. 13, 1968 0400 *2.6 1.66 Feb. 24 1969 1800 6,800 9.58 Jan . 31, 1967 0030 101 2.14 Apr. 6 1969 0030 96 4.59 Mar . 14, 1967 0500 70 1.94 Jan. 19, 1969 1900 1 ,230 S.23 Mar . S , 1970 0500 *27 2.50 a No fl ow for entire year. No flow fo r all or part of each year. Per iod of record: Maximum discharge, 9,020 cfs Jan. 25 , 1969 (gage height, 10. SI ft); from rating ci t at gage hei ght 10.30 ft; r all or

REMARKS.--Records fair. No gage-height record Dec. 8, 1966, to Jan. 23, 1967, Feb. 1 to Mar. 13, Mar. 15 to Apr. 16, 1967. No regulation or diversion above station.

DISCHARGE. IN CUBIC FFET PER SECOND, HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY OCT NOV DEC JAN FEft MAR APR MAY JUN JUL AUG

TOTAL 0 0 0 0 0 0 MEAN 3 0 0 0 0 0 MAX 0 0 0 0- 3 0 MIN 0 0 0 o 0 0 AC-FT 0 D a 0 0 0

MTR YR 1966 TOTAL O.CC MEAN .0000 MAX .0 MIN 0 AC-FT SANTA MARIA RIVER BASIN

11137400 ALAMO CREEK NEAR NIPOMO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967

NOV DEC JAN FEB MAR APR MAY JUN JUL

.3J 58 2.5 3 61 4. .30 43 .30 30 2.2 3 48 A . .31 22 2.1 3 43 . 71 .33 17 2.0 3 39 4,09 .30 14 1.9 3.5 35 55 .30 12 1.9 95 31 2^ .30 U 1.8 81 29 10 .30 9.6 1.7 60 28 . 7 .2'j 8.8 1.6 55 27

4 .20 8.0 1.5 135 24 fc 2 .20 7.5 1.4 87 19 . 1 .20 7.0 1.4 61 19 . .0 .20 6.6 56 49 16 , .0 .10 6.2 40 45 15 .5 .1C 5.B 30 38 14 .5 .10 5.4 20 35 14 .1 3 5.- 15 291 13 , .9T 0 4.7 11 455 13 . .90 0 4.5 7.0 438 13

.90 0 4.3 6. 440 12 w .80 0 4.D 5. 333 11 .80 0 3.7 4. 462 11 .: .70 75 3.5 4. 264 11 .: .70 109 3.3 3. 19B 11

.60 46 3.D 3. 148 10 4 .60 30 2.B 3. 114 9.7 .51 20 2.6 3. 92 8.0 .51 15 3. 84 7.2 . .40 11 3. 73 6.4 .4C 73 3. 5.2 0 5,819.80 383.00 312.3 248.6 4,151.0 657.5 5 .7 0 188 12.4 11.2 8.02 138 21.2 .8 0 4,090 109 58 56 462 61 4. 0 n 0 2.6 1.4 3.5 5.2 .7 0 11,5*0

CAL YR 1966 TOTAL 5,819.80 MEAN 15.9 MAX 4,09.0

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

NOV DEC JAN FEB MAR APR MAY JUN JUL

31

T07AL MEAN MAX WIN AC-FT

AC-FT 11,530 SANTA MARIA RIVER BASIN

11137400 ALAMO CREEK NEAR NIPOMO, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 196B TO SEPTEMBER 1969

1 146 70 29 11 .7 0 .06 2 (, 135 75 30 10 .5 0 .06 3 ; 133 82 46 11 .5 0 .03 4 C 128 62 32 U .5 0 .03 5 c 184 89 44 9.7 .2 0 .03 6 0 967 232 63 8.B .2 0 .01 1 o 429 192 42 8 .2 0 .01 fi c 2T3 161 38 8 .2 0 0 9 ' 198 141 30 8 .0 0 0 1C 0

11 u 116 118 26 .77 0 0 12 1 120 1C6 24 .66 0 0 13 o 106 103 23 .66 j 0 14 0 96 86 22 .66 C 0 15 " ice 78 21 .66 0 0 16 P 11C 72 20 .66' C 0 17 0 94 67 19 .66 Z 0 IB 0 118 62 18 .66 0 0 19 2C5 17C 60 17 .55 0 0 2: 71 157 60 16 .55 0 0 21 824 135 62 16 .55 0 0 22 225 168 50 16 .46 3 0 23 0 24 298 2,220 43 17 .46 .06 0 25 2,980 1,400 40 16 .38 .06 0 26 0 27 742 575 35 13 .24 .06 0 28 422 652 33 12 .18 .06 0 29 323 ...... 32 11 .06 .06 0 30 203 30 11 0 .06 0 31 150 29 .06 0

TOTAL 0 .007 c MAX .06 0 KIN C C P 0 94 29 11 700 0 0 AC-FT 0 0 C 15,690 25,110 6,860 1,450 1 45 1.1 .5 0 .2 MAX 2,980 MIN 0 AC-FT 46,510

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL

TOTAL 0 0 C 0 0 MEAN 0 C c 0 0 MAX 0 0 0 C C MIN 0 0 0 0 0 AC-FT 0 0 0 0 0 CAL YR 1969 TOTAL 23.448 .95 WTR YR 1970 TOTAL B.70 MEAN .02 514 SANTA MARIA RIVER BASIN

11137900 HUASNA RIVER NEAR ARROYO GRANDE, CALIF. LOCATION.--Lat 35°04'40", long 120°22'15", in Huasna Grant, San Luis Obispo County, on right bank 300 ft down-

DRAINAGE AREA.--103 sq mi (revised). PERIOD OF RECORD.--June 1959 to September 1970. GAGE.--Water-stage recorder. Altitude of gage 640 ft (from topographic map). AVERAGE DISCHARGE.--11 years, 23.0 cfs (16,660 acre-ft per year); median of yearly mean di [2,800 acre-ft per year).

EXTREMES. --Maxi mums and (discharg eet p gage height in feet) .

Annual maxim urn discha rge ( ) and peak disc harge 5 above ba se (40 cfs), water years 1966 70 Date Time Di sch. G H. Dat e Time Disch. G.H. Date Time Disch. G.H. Nov. 24, 1965 0500 *520 5. 40 Apr . 7, 1967 1100 246 5.52 Feb. 6, 1969 0230 3,160 6.50 Dec. 29, 1965 1930 499 5. 16 Apr . 11, 1967 0700 345 5.75 Feb. 24, 1969 1700 15,000 13.25 Apr . 19, 1967 2000 600 6.25 Feb. 28, 1969 1500 2,920 6.23 Dec. 3, 1966 0500 380 5. 20 Apr . 23, 1967 2400 725 6.43 Apr. 5, 1969 1SOO 167 4.98 Dec. 6, 1966 0600 *14 ,300 14. 55 Jan. 24, 1967 1300 1 ,420 6. 10 Mar . 8, 1968 1630 *104 5.69 Jan. 16, 1970 1830 74 4.66 Jan. 30, 1967 2000 429 4. 77 Mar. 1, 1970 2700 *788 5.22 Mar. 13, 1967 0430 536 5. 35 Jan . 19, 1969 1100 7,780 10.48 Mar. 4, 1970 2300 436 4.87 Mar. 16, 1967 1900 6.8 0 5 . 55 Jan . 25, 1969 0600 *21,000 15.90

Wtr yr Date Disc harge . 9, 1965 0 1969 0 ct. 1 to Nov. 14, 1969 .20 1967 Oct. 31 to Nov. 6, 1966 0 1970 S ept. 10-12 , 1970 .09 .10

Pe riod of record: Maximum discharge , 21,000 cfs Jan. 25, 1969 (gage hei ght, 15.90 ft), from rating cu rve ve 1,300 c on sis of si ope-area measureme nt of pea k flow; no flow many days in n ost yfars REMARKS. --Recor 8, 1969. No

DISCHARGE, IN CUBIC FEET PER- SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 DAY OCT JUN JUL AUG SEP

1 0 0 .70 100 3.7 5.2 1. .90 1.0 .10 .20 .10 ^ 0 0 7*^ 43 8.4 5.0 1. .90 1.0 .10 .30 .10 3 0 3 1.0 30 7.5 4.6 1. .90 1.0 .10 .30 .10 4 0 0 .70 23 7.5 4.6 1. .90 l.C .It) .30 .10 5 C C .70 18 7.8 4.2 1. .90 1.0 -^.10 .20 .10 6 0 0 .60 15 10 4.2 I. .90 l.C .10- .20 .10 7 0 3 .60 14 13 4.0 1. .90 .60 .10 .20 .10 8 0 0 .6C 13 13 3.8 1. .90 .40 .10 .20 .10 9 .10 0 .bj 12 11 3.6 1.8 .90 .30 .10 .20 .10 1C 3 .10 .6? 12 10 3.2 1.8 .90 .20 .20 .20 .10 11 0 .10 .7C 11 9.9 3.2 1.3 .90 .13 .20 .20 .10 12 0 .10 .90 10 9.3 3.1 1.8 .90 .10 .20 .10 .10 13 0 10 1.0 10 9.3 3.0 1.8 1.0 .10 .20 .10 .10 14 0 .20 .90 10 S. 4 3.0 1.5 .90 .40 .20 .10 .10 15 0 .20 .3? 10 8.1 3.0 1.5 .80 .20 .20 .10 .10 .80' 16 0 .60 10 7.5 2.6 1.5 .60 .20 .30 .10 .10 17 0 .30 .80 10 7.5 2.4 1.5 .60 .20 .30 .10 .10 18 0 .40 .80 10 7.5 2.4 1.5 .60 .20 .30 .10 .10 19 0 .30 .80 9.9 6.8 2.4 1.3 .60 .10 .30 .20 .10 20 0 .30 .80 9.9 6.5 2.2 .90 .50 .10 .30 .20 .10 21 0 .30 .80 9.3 6.2 2.1 .80 .60 .10 .30 .20 .10 22 0 .4C .80 9.0 6.0 2.1 .80 .50 .10 .20 .20 .10 23 0 1.4 .80 9.0 6.0 2.0 .80 .40 .11 .20 .10 .10 24 0 73 .80 8.7 6.0 2.1 .80 .40 .10 .10 .10 .10 25 0 13 .90 8.4 6.0 2.1 .80 .40 .10 .10 .10 .10

26 0 9.6 .90 7.8 6.5 2.1 .80 .40 .20 .10 .10 .10 27 0 1.1 .90 7.5 5.8 2.1 .80 .50 .20 .60 .10 .10 28 0 .70 1.0 6.0 5.2 2.1 .90 .60 .10 .20 .10 .10 29 0 .70 72 5.4 2.1 .90 1.0 .10 .20 .10 .20 30 0 .90 153 10 2.0 .90 1.0 .20 .20 .10 .20 31 0 167 9.9 1.9 1.0 . .20 .10 TOTAL .10 108.80 414.00 476.8 225.4 92.4 42.20 23.20 10.50 6.00 4.90 3.20 .16 .11 MAX .10 73 167 ICO 13 5.2 1.9 1.0 1.0 .60 .30 .20 HIM 0 0 .60 5.4 5.2 1.9 .80 .40 .1C .10 .10 .10 84 -o 21 12 9.7 6.4 CAL YR 1965 TOTAL 2,174 80 MEAN 5.96 MAX 285 MIN 0 AC-FT 4,310 SANTA MARIA RIVER BASIN

11137900 HUASNA RIVER NEAR ARROYO GRANDE, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 DAY OCT MAY JUN JUL AUG SEP 1 . C C .20 9.4 71 17 42 112 15 3.6 1.6 1.0 2 . 0 o .70 9.4 54 14 40 100 15 3.6 1.6 1.2 3 . 0 0 35 10 44 17 38 89 15 3.4 1.6 1.3 4 . C 0 1.0 10 42 15 44 84 15 3.2 1.6 1.3 5 0 3 1,050 11 36 14 63 76 14 3.2 1.6 1.4 6 . 0 0 8,470 11 30 14 52 71 14 3.2 1.6 1.4 7 . 0 .10 501, 11 30 13 175 68 13 3.2 1.6 1.5 8 . 0 .1C 270 11 28 14 139 64 12 3.1 1.6 1.6 9 . 0 .1C 150 10 26 14 110 61 12 3.1 1.6 1.8 i: .20 .10 100 9.4 25 14 99 58 12 3.1 1.6 1.8 i .23 .10 75 8.8 3.0 1.5 1.9 2 .20 .1C 51 8.2 23 215 175 50 10 3.0 1.4 1.9 3 .20 .10 50 7.2 21 313 153 48 10 2.6 1.4 2.0 4 .20 .1C 50 6.7 20 218 150 45 9.6 2.6 1.4 2.0 5 .20 .1C 48 5.8 20 136 144 43 9.3 2.6 1.3 2.0 16 .20 .10 45 4.8 19 290 139 40 8.7 2.6 1.3 2.0 17 .20 .10 43 4.8 19 396 133 36 7.8 2.5 1.3 2.0 18 .20 .10 41 5.3 18 191 350 34 7.5 2.4 1.3 2.0 19 .20 .10 36 5.3 18 144 535 32 7.2 2.4 1.2 2.0 20 .10 .30 33 5.3 17 117 471 29 6.2 2.2 1.2 2.0 21 .10 .20 30 2.0 1.2 2.0 22 .10 .20 27 20 16 76 502 26 5.4 1.9 1.2 1.9 23 .10 .20 24 17 16 71 448 25 5.4 1.8 1.2 1.6 24 .1C .20 21 522 16 1 645 24 4.6 1.8 1.1 1.4 25 .10 .20 18 394 20 5 499 22 4.6 1.6 1.1 1.4 26 .1C .20 15 118 18 8 300 21 3.8 1.6 1.1 1.5 ?7 .10 .20 12 102 17 4 Z20 19 3.8 .6 1.1 1.5 28 .10 .20 10 78 17 9 183 19 4.0 .6 1.1 1.5 29 .10 .2C 10 63 _« 4 153 18 4.0 .6 1.1 1.6 3C .10 .20 10 171 3 130 16 3.8 .6 1.1 1.6 31 3 19 154 55 15 .6 1.1 TOTAL 4.00 50.1 46.1 9.00 2.49 1.35 1.67 MAX 112 15 3.6 1.6 2.0 MIN 0 0 .20 4.8 16 13 38 15 3.8 1.6 1.1 l.C 535 153 83 99

I . 1.2 1.2 .70 .0 1.3 .7 0 .50 .60 .10 .20 2 . 1.2 1.0 .70 .2 1.3 .4 3 .50 .60 .10 .20 3 . 1.2 1.0 .60 .2 1.3 ro .50 .60 .10 .20 4 . .2 1.0 .60 .2 1.5 !o ! ro .50 .60 .10 .20 5 .2 1.2 .60 .2 1.8 .6 10 .50 .50 .10 .20

6 . .2 1.0 .60 .2 2.0 .2 )0 .50 .50 .20 .20 7 ^ .2 1.0 .60 .2 3.2 .7 . 10 .40 .40 .10 .20 8 . .2 i.a .60 .2 12 .2 10 .40 .40 .10 .50 9 , .2 1.0 .60 .2 17 0 . 0 .40 .40 .10 .40 10 . 1.2 1.0 1.3 .2 4.2 .0 0 .40 .30 .10 .20

11 1.2 1.2 1.0 .90 .2 2.2 .0 . 0 .40 .30 .10 .20 12 .80 1.2 1.2 .80 .2 1.5 .8 . .30 .20 .10 .20 13 .60 1.2 1.2 .80 .2 4.6 .6 .60 .30 .10 .20 14 .60 1.2 1.0 .80 .0 5.0 .6 1.0 .30 .10 .10 15 .50 1.2 1.0 .80 .0 5.0 .6 . 0 .60 .40 .10 .20

16 .50 1.2 1.0 .80 .0 4.6 .6 .50 .40 .10 .20 17 .50 1.2 1.2 .80 .2 4.6 .6 .40 .40 .10 .10 18 .50 1.2 2.0 .80 .2 5.8 .6 .40 .40 .10 .20 19 .50 .2 1.6 .90 .2 5.0 .6 .50 .40 .10 .20 20 .50 .C 1.5 .90 .2 4.2 .6 .50 .40 .20 .10

21 .$0 .2 1.5 l.C .2 3.6 .6 .90 .40 .30 .10 22 .60 .0 1.5 l.C .2 3.6 .6 . .60 .40 .30 .10 23 .70 .C 1.3 1.0 .2 3.6 .8 .50 .40 .30 .10 24 . 0 1.0 .80 1.2 .2 3.2 .8 .70 .40 .30 .20 25 1- 1.0 .90 1.2 .2 3.0 .8 0 .60 .40 .30 .20

26 1.0 .90 1.2 .3 3.0 .6 0 .60 .50 .20 .20 27 1.0 .90 1.3 .3 2.4 .0 0 .60 .50 .20 .20 28 f 1.0 .90 1.3 .3 2.2 .70 0 .60 .40 .20 .20 29 . 1.2 .80 1.2 .3 2.2 .60 ro .60 .30 .20 .20 30 1.5 .80 1.2 2.2 .60 ro .60 .20 .20 .20 31 .80 1.2 .0 .10 .20

4.90 5.90 MEAN .03 1.16 1.10 .89 1 19 3.85 >.16 1. ii .54 .40 .16 .20 MAX 1.6 1.5 2.0 1.3 .3 17 6.3 2 2 1.0 .60 .30 .50 MIN .50 1.0 .80 .60 .0 1.3 .60 . iO .30 .10 .10 .10 AC-FT 63 69 68 55 68 237 129 )2 32 25 9.7 12 SANTA MARIA RIVER BASIN

11137900 HUASNA RIVER NEAR ARROYO GRANDE, CALIF.--CONTINUED

DISCHAKGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

18 3.7 2.5 1.8 1.3 2 .2 17 3.6 2.5 1.8 1.2 3 .2 0 .20 .30 .30 153 944 68 17 3.6 2.5 1.6 1.1 4 .2 C .20 .30 .30 147 709 49 17 3.6 2.5 1.5 '1.2 5 .2 0 .20 .3D .30 2BB 512 72 16 3.5 2.4 1.5 1.2 6 .2 0 .20 .30 .30 1,750 415 B5 16 3.5 2.4 1.5 1.2 7 .2 3.5 2.4 1.5 1.2 e .20 .20 .30 .30 450 280 52 15 3.4 2.4 1.5 1.2 9 .20 .20 .33 .30 295 224 46 15 3.4 2.4 1.5 .96 1C .20 .20 .30 .30 270 199 46 14 3.4 2.4 1.5 .96

3.4 2.4 1.5 .96 12 .2 0 .20 .33 .30 191 144 41 12 3.1 2.2 1.5 .96 13 .2 0 .20 .30 .30 130 136 38 11 3.0 2.1 1.5 .96 14 .2 0 .20 .30 .30 161 120 36 10 3.0 2.1 1.5 1.0 15 .20 .30 .30 .30 199 105 33 9.4 3.0 2.0 1.5 1.1 16 .2 0 .30 .30 .30 169 100 31 B.O 3.0 2.0 1.5 1.1 17 .2 0 .30 .30 .30 130 95 31 7.0 3.0 2.0 1.5 1.1 IS .2 0 .30 .30 12 157 89 30 6.0 2.8 2.0 1.5 1.1 19 .2 0 .30 .30 1.950 194 82 29 5.4 2.8 2.0 1.5 1.1 20 .2 0 .3C .30 581 179 80 29 5.D 2.8 2.0 1.4 1.1 21 .2 3 .30 .30 2,640 155 82 28 4.8 2.8 2.0 1.4 1.0 22 .2 0 .30 .30 519 816 72 27 4.6 2.6 2.0 1.4 1.0 ?3 .2 0 .30 .30 215 733 68 27 4.5 2.6 2.0 1.4 1.0 24 .2 C .30 .30 857 4,580 63 26 4.4 2.8 1.9 1.3 1.0 25 .2 25 4.3 2.8 1.9 1.3 1.0

4.2 2.6 1.9 1.3 .90 27 .2 0 .30 .30 912 1,040 53 22 4.1 2.6 1.9 1.3 .90 28 .2 0 .30 .3n 665 1,660 52 21 4.0 2.5 1.9 1.3 .90 29 .20 .3? .30 447 SO 20 3.9 30 .2 0 .30 .30 279 49 19 3.8 2.5 1.9 1.3 .90 31 .2

TOTAL 6.2 8,252 1.C5 MAX .20 .33 .30 7,790 4,580 1,610 85 18 3.7 2.5 1.8 1.3 HIN .20 .20 .30 .30 130 46 19 3.7 2.5 1.8 1.3 .90 AC-FT 12 15 18 40,420 37,560 16,373 2.31C 581 182 132 90 62

DISCHARGE . IN CUC 1C FEET PER SECOND , MATER YEAR OCTOBER 1969 TO SEPTEM8ER 1970 CAY DC r NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .8 1.2 272 4.8 2.0 .2 .79 .45 .28 2 .8 1 .71 .96 .79 1.2 226 4.6 2.0 ,2 .79 .45 .28 3 .e 1 .71 .96 .79 1.2 61 4.4 1.9 .2 .79 .45 .28 4 .8 .28 5 .7 I .79 .96 .79 1.2 157 4.2 1.8 .2 .71 .39 .20

6 .7 I 1.1 .96 .87 1.3 45 4.C 1.6 .2 .71 .39 .20 7 .7 9 .87 1.1 .79 1.3 28 3.8 1.5 .2 .71 .39 .20 8 .7 J .79 1.1 .79 1.3 24 3.6 1.5 .2 .71 .33 .12 9 .8 1 .71 1.1 1.0 1.3 21 3.4 1.5 .4 .71 .28 .12 1C .8 7 .71 1.0 .96 1.4 19 3.2 1.5 .3 .71 .28 .09 11 .9 b .71 .87 .96 1.4 17 3.1 1.5 1.0 .64 .28 .09 12 .9 b .71 .79 .87 1.4 17 3.0 1.5 .79 .64 .28 .09 13 .B 7 .71 .79 .79 1.6 15 2.8 1.5 .79 .64 .28 .12 14 .8 2.4 14 2.8 1.5 .79 .64 .28 .12 15 .6 l.B 12 2.6 1.5 .79 .64 .28 .16 16 .9 b .79 .79 ?4 1.6 1C .28 .20 17 l.C .79 .79 8.0 1.6 9.6 ?.5 1.5 .79 .64 .28 .24 18 1.1 .79 .79 1.5 1.9 B.4 2.4 1.5 .64 .64 .28 .16 19 1.1 .79 .79 1.5 1.9 7.5 2.2 1.4 .64 .64 .28 .20 20 1.1 .79 .79 1.4 2.0 7.2 2.2 1.3 .71 .57 .28 .20 21 1.0 .79 .87 1.4 1.9 7.0 2.2 1.3 .71 .57 .28 .24 22 .8 .79 .79 1.3 1.9 7.0 2.2 1.3 .71 .57 .28 .24 23 .8 .79 .79 1.3 1.6 6.5 2.2 1.3 .71 .57 .28 .28 24 .8 .79 .79 1.3 1.4 6.5 2.1 1.3 .79 .51 .28 .33 25 .B .79 .96 1.2 1.4 6.5 2.0 1.3 .79 .51 .28 .28 26 .8 .79 .79 1.2 1.6 6.0 2.0 1.3 .87 .51 .28 .24 27 .8 .87 .79 1.2 2.0 5.8 2.0 1.2 .79 .51 .26 .24 28 .8 .87 .79 1.2 12 5.B 2.0 1.2 .79 .51 .28 .24 29 .8 .96 .71 1.2 5.6 2.0 1.2 .79 .51 .28 .20 30 .7 .96 .71 1.2 5.4 2.0 1.2 .79 .51 .28 .20 31 .7

TOTAL 27.4 23. 67 26.74 63.00 54.0 1 ,151.0 67. 2 45.7 27.77 19.48 9.68 6.12 MEAN .8 .80 .86 2.03 1.93 37.1 2.91 1.47 .93 .63 .31 .20 MAX 1. 1.1 1.1 24 12 272 4.8 2.0 1.4 .79 .45 .33 MIN .7 I .71 .71 .79 1.2 5.2 2.0 1.2 .64 .45 .28 .09 AC-FT 5 19 12 SANTA MARIA RIVER BASIN

11138100 CUYAMA RIVER BELOW TWITCHELL DAM, CALIF. LOCATION

DRAINAGE AREA. --1 ,132 sq mi.

PERIOD OF RECORD. --October 1958 to September 1970. GAGE. --Water-stag e record er. Altitude of g age is 390 ft (from topographic map) . EXTREMES .--Maximums and m inimums (dis ch irge in cubi c feet per second, gage height in feet) for the water years 1966- 70 are co g t able: Maximum Minimum Wtr yr Date Dis charge G.H. Date Di scharge G.H. 1966 Mar. 26, 1966 231 4.53 Long perio ds 0 1967 Aug. 24, 1967 382 5.15 do. 0 1968 Nov. 19, 1967 189 4.53 do. 0 1969 Feb. 25, 1969 6,920 10.58 do. 0 1970 Nov. S, 1969 316 3.45 Sept. 26-30 , 1970 .20

Pe riod of r ecord: Maximum discharge, 6,920 c fs Feb. 25, 1969 (gage height, 10.58 ft); no fl ow at times in most years. REMARKS . --Records good. Flow regulat ed sin ce February 1959 by Twitchell Reservoi r (capacity, 240, 000 acre-ft). Some pumping from wells along stre am for irrigation above station. REVISIONS. --WSP 1928: Dr ainage area. DISCHARGE, IN' CUBIC FEFT PER SECOND, HATER YEAR OCTOBER 1965 TO SEPTEMBER 1966 CAY OCT NOV DEC JAN Fee MAR APR MAY JUN JUL AUG SEP 1 ^ 133 3. 2.5 .30 8.0 .50 .10 2 C 40 ?. 1.5 .30 .4 .50 .10 3 C 7.6 1. 1.0 .30 .1 .50 .10 4 c 4.2 1. .70 .20 . 1 .50 .10 5 0 2.3 ! l.C .20 .4 .40 0 6 0 1.3 u 2.0 .20 .8 .40 0 7 0 1.0 1 . l.H .20 .8 .30 0 8 c .70 1. 1.3 .20 .6 .40 0 9 c .80 1. l.C .20 .0 .40 0 10 0 1.0 1. .80 .20 .8 .40 0 11 0 .90 1. .8" .10 .4 .40 0 12 0 3.0 t 0 .70 .20 .6 .30 0 13 c 4.6 1. .70 .20 .0 .30 D 14 c 0 15 1.8 . 0 .80 .30 .1 I .1 0 16 w 1.3 .90 .90 .30 .2 .40 C 17 0 .90 , »0 l.C 30 .3 .3D 0 18 c .70 . 10 .90 199 .5 .30 0 19 3 .50 w <)0 .7C 203 .9 .30 0 20 13 .50 .90 .60 203 .5 .20 0 21 6.3 .60 .80 .60 143 .4 .20 0 22 1.1 .60 . )C .50 13 .4 .20 0 23 .10 .90 . 10 .40 2.3 .3 .20 0 24 18 .30 . )0 .40 40 .1 .20 0 25 16 .60 . 1C .30 227 .70 .20 0 26 1.2 .70 .70 .30 227 ,7C .20 c 27 .20 1.2 . JO .30 221 .60 .20 0 26 C 1.3 , to .30 213 .50 .10 0 29 4.1 19 .70 201 .70 .10 0 3? 129 4.2 151 .50 .10 0 31 1:1 4.J 23 .10 TOTAL 0 0 0 MEAN 0 6.30 7.99 1.31 .66 67.7 2.89 .32 .013 0 0 0 MAX 129 133 4.2 2.5 227 8.0 1.1 .10 0 0 0 MIN 0 .30 .70 .30 .10 .50 .10 0 0 C 0 AC-FT 0 .8 0 0 0 MIN 0 AC-FT 3,870 HTR YR 1966 TOTAL 2,698. 80 MEAN 7. 39 MAX 227 MIN 0 AC-FT 5,350 SANTA MARIA RIVER BASIN

11138100 CUYAMA RIVER BELOW TWITCHELL DAM, CALIF.--CONTINUED DISCHARGE, IN CUBIC FECT PER SECOND, WATER YEAR OCTOBER 1">66 TO SEPTE

JUN JUL AUG SEP

2 f, c ,4 .3 .2 2.8 60 229 35C 355 3 CO .4 .2 .4 3.0 209 229 360 352 4 C C . 3 . 3 .1 2.8 213 229 358 350 5 C C 2 . 2 .6 2.6 213 229 358 345 6 .30 0 .9 .0 .0 2.4 213 233 355 342 fl 00 .9 .6 .? 2.2 213 237 355 342 9 CO £ .8 .9 2.3 211 237 352 342 10 CO .C .8 .9 3.0 213 237 352 342 11 ; a .6 .8 .4 2.6 215 243 352 345 12 C .C .2 .6 2.3 217 258 350 345 1* CO .1 .0 1.9 217 265 350 345

16 OP .4 .6 8.5 221 27 C 348 348 17 00 .4 .2 . 2 91 227 278 345 34B 18 00 . 4 .4 .9 94 213 278 345 345 19 00 .5 .4 .8 96 215 282 355 335 20 C .30 .4 .4 .4 105 231 282 358 332

21 i, .<,- .4 .3 .4 113 231 288 360 34C 23 0 2.4 .0 .4 .6 133 231 305 362 338 2* ; 15 .4 .4 .7 147 231 305 380 335 25 C 11 .Z .3 .6 157 233 310 378 332

27 (. 2.4 .0 ^ 3 .2 169 233 322 239 330 28 0 2.0 .3 .2 179 233 350 237 330 30 3 3.8 - .4 193 229 345 240 ' 29

M I N fl 0 0 ' a 1 .0 .2 .4 1.8 60 229 235 29

5,100

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1967 TO SEPTEMBER 196 DAY OCT MOV DEC JAN FEB MAR APR HAY JUN JUL 1 2 129' 3 76 167 133 125 127 16 1.9 .40 .20 4 1.5 .90 .20 5 127 165 133 125 127 129 14 1.4 2.0 .20 6 129 163 131 125 127 129 14 1.2 .3 .20 7 127 163 131 125 127 127 13 l.C .2 .20 8 127 35 7.0 3.0 .7 .20 9 127 161 127 125 127 7.6 15 16 .9 .20 1C . 2 .20 11 129 161 127 125 127 4.8 14 12 .8 . 6 12 129 161 127 125 127 3.4 15 13 .5 . 7 13 129 159 127 125 129 5.4 14 12 1 . 8 14 136 159 127 125 129 3.8 14 4.2 .3 . 6 15 171 159 127 129 127 2.7 12 1.4 .8 . 6 16 171 159 131 129 127 2.8 13 1.0 .8 .11 17 171 161 131 129 110 2.6 12 .70 I .06 18 171 175 131 129 22 2.0 11 .60 .1 o 19 171 131 128 129 6.7 2.4 6.4 .60 .5 0 . 2(1 171 28 107 129 4.0 121 3.4 5.8 .60 0 21 171 101 109 127 29 19 2.3 2.fk .40 0 22 171 1C2 121 127 127 19 1.6 1.1 .30 0 23 157' 102 121 127 127 17 1.5 .70 .30 0 24 155 109 119 127 127 15 5.1 .50 .30 0 25 155 129 119 127 127 13 5.1 .40 .30 0 26 155 127 119 129 127 111 4.8 .50 .30 0 27 155 127 119 129 127 125 4.4 1.2 .30 0 28 155 141 123 129 127 93 3.8 1.1 .30 0 29 155 145 127 129 129 17 3.4 .80 .20 0 30 155 161 127 129 5.4 3.0 .50 .20 0 31 159 125 129 4.8 .50 0 3.00 MEAN MAX 171 175 153 129 129 129 16 16 11 .20 KIN 55 28 107 125 4.0 2.0 1.5 .40 .20 0 6.0 SANTA MARIA RIVER BASIN

11138100 CUYAMA RIVER BELOW TWITCHELL DAM, CALIF.--CONTINUED

DAY OCT NOV DEC JAN JUN JUL AUG SEP

1 1 4.9 2 570 6.4 126 235 248 252 235 2 4.4 4 266 3 0 4.1 4 000 1 .3 124 233 252 252 265 4 C 3.7 4 020 ( .2 163 236 256 256 265 5 0 7.9 4 OCO « 6 0 13 3 420 1 .9 166 236 252 255 261 7 0 6.7 1 920 C 8 5.0 1 990 t .2 166 232 256 256 261 9 0 4.5 2 000 < .2 182 232 260 257 261 10 0 4.6 2 000 C .0 227 228 256 252 262 11 0 7.3 1 ,410 " .8 232 220 256 253 27B 12 0 13 762 1 .8 229 220 256 255 276 13 C 9.2 50C *. .6 214 220 260 255 275 14 0 8.8 347 5 .4 211 15 0 12 23 5 .0 214 16 12 16 s 17 C 12 14 *. .1 214 228 260 258 271 18 16 12 5 .0 216 256 256 253 283 19 . 2 20 11 5 .0 216 252 260 251 281 2C 4k 19 . 10 « .9 219 21 6. IB 11 A .9 219 244 252 251 277 22 5. 23 9.4 '. .1 222 244 252 249 272 23 2. 28 8.8 * 24 3. 47 8.3 5 .1 224 236 252 249 267 25 38 1,630 7.9 i

26 34 291 7.6 5 .4 225 236 252 247 266 27 16 345 7.4 5 .8 228 28 11 1.920 7.2 « 29 7.7 7.0 1 .0 230 240 252 254 269 6.2 6.9 41 233 244 252 257 283 31 5.4 TOTAL 0 0 0 8,048 MEAN 0 0 4.53 160 1,072 7.06 203 235 254 254 268 MAX 0 0 38 283 MIN 0 C 0 0 AC-FT C 0 0 279

DISCHARGE, IN CUBIC FEET PER SECOND , WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

1 288 287 262 220 160 23 187 227 207 128 2.2 .35 2 287 290 261 220 160 13 191 227 204 71 l.B .35 3 286 289 261 220 160 10 205 227 202 34 2.0 .35 4 284 289 260 220 160 11 201 224 202 20 1.6 .35 5 287 290 260 219 161 11 201 224 201 13 1.4 .35 6 290 271 260 217 161 8.1 202 226 200 9.9 1.2 .35 7 290 193 260 217 161 7.2 202 226 200 8.3 .91 .35 8 160 6.6 202 225 198 6.7 .96 .35 9 .61 .35 10 289 193 256 115 .63 .35 11 290 212 256 109 .69 .35 12 288 267 256 107 161 23 i Cl 223 192 7.6 .65 .30 13 292 266 256 107 162 101 . 02 223 189 8.9 .70 .30 14 293 272 255 107 160 105 99 218 189 14 .71 .30 15 292 272 252 108 160 105 99 217 190 6.5 .67 .30 16 296 271 252 100 160 .30 17 293 268 252 18 161 144 99 217 1B9 4.6 .60 .30 18 99 218 189 4.1 .60 .30 19 290 271 253 28 16? 179 99 217 188 3.9 .55 .30 20 294 270 252 128 160 181 96 217 187 3.9 .55 .30 21 292 267 253 133 163 180 97 216 183 3.5 .50 .25 22 163 178 98 217 183 3.1 .50 .25 23 175 98 217 185 3.0 .48 .25 24 292 262 244 138 165 175 99 214 198 3.4 .45 .25 25 290 260 246 144 164 178 99 214 198 3.1 .41 .25 26 Z90 259 243 160 165 190 96 214 196 2.9 .41 .20 27 288 262 242 160 165 190 97 214 191 2.6 .41 .20 28 139 188 99 213 189 . 2.4 .41 .20 29 2B8 260 240 163 187 2 26 213 186 2.4 .41 .20 30 288 260 235 160 187 ; 28 210 1B1 2.2 .41 .20 31 287 220 160 _____ 187 - 209 1.9 .41

MEAN 290 258 MAX 296 290 262 220 165 190 228 227 207 164 2.2 .35 MIN 284 190 220 9.9 1.9 .41 .20 AC-FT 17,830 17

MIN .20 AC-FT 111,300 SANTA MARIA RIVER BASIN

11138500 SISQUOC RIVER NEAR SISQUOC, CALIF. LOCATION.--! bank 2.6 miles (revised) DRAINAGE AREA.--281 sq mi. PERIOD OF RECORD.--October 1943 to Septem 1970. October 1929 to September 1933, at site 0.2 mile do low-flow records not equivalent owing diversion immediately upstream. Monthly discharge only for periods, published in WSP 1315-B. GAGE.--Water-stage recorder. Datum of gage is 624.30 ft above el (Corps o f Engine See WSP 1928 for history of changes prior to Aug. 24, 1951. AVERAGE DISCHARGE.--27 years, 43.2 cfs (31,300 acre-ft per year); median of yearly mean dis :harge (11,600 acre-ft per year). EXTREMES.--Maxin nd min (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (150 cfs revised), water year Time Disch. G.H. Date Disch. Date Time 17, 1965 1100 240 3.35 Mar. 31, 1967 0615 716 Mar. 8, 1968 0900 24, 1965 0945 1,820 6.05 Apr. 4, 1967 1945 1,220 29, 1965 1445 3,020 7.32 Apr. 7, 1967 0800 515 Jan. 21, 1969 0615 7,650 10.49 6, 1966 0030 307 3.21 Apr. 11, 1967 0315 1,490 Jan. 25, 1969 1000 21,400 15.39 Apr. 18, 1967 1230 1,260 Feb. 6, 1969 0500 2,650 6.00 3, 1966 0315 2,960 Apr. 22, 1967 0245 1,120 Feb. 24, 1969 2030 17,800 14.36 6, 1966 1630 23,200 Sept. 28 1967 2330 515 Apr. 5, 1969 2200 758 3.76 22, 1967 1245 1,630 Jan. 24, 1967 1530 3,030 7.03 Oct. 6, 1967 0015 180 Jan. 16, 1970 1700 758 3.73 Jan. 31, 1967 0800 312 3.32 Nov. 21, 1967 1900 920 Mar. 1, 1970 1445 1,570 4.44 Mar. 12, 1967 2315 1,270 5.38 Nov. 30, 1967 1400 205 Mar. 4, 1970 2330 1,120 3.92 Annual minimum daily discharge, Wtr yr Date Discharge Wtr yr arge 1966 Oct. 23-30, 1965 1.1 1969 26, 1968 .36 1967 Nov. 1, 2, 4, 5, 1966 1.0 1970 Sept.28-30, 1970 .90 1968 Nov. 11-18, 1967 0 Period of record: Maximum discharge, 23,200 cfs Dec. 6, 1966 (gage height, 15.75 ft), from ra extended above 1,700 cfs on basis of slope-area measurements at gage heights 10.08 and 15.75 ft; Nov. 11-18, 1967. Flood of Mar. 2, 1938, 11,000 cfs (gage height, 8.1 ft, from high watermark in gage well, at 1929-33), from rating curve extended above 2,800 cfs. REMARKS.--Records fair. No regulation or diversion above station. REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

DAY (X

I 33 333 61 39 20 11 3.1) 2. .0 2 26 221 54 41 19 9. 3. 2. .0 3 24 170 3 40 19 9. 3. 2. .0 4 21 136 0 37 19 8. 3 , 2. .0 5 20 111 1 35 20 8. 3. 2. .9

6 18 99 12 34 20 8. 3. 2. .9 7 15 91 12 32 20 7. 3. 2. .9 8 16 86 19 31 19 7. 3 , 2. .9 9 17 83 103 31 19 8. 2 . 2. .8 ID 17 77 85 30 19 8. 2 , 2. .9

11 17 72 81 30 18 8. 2. 2. .9 12 23 64 73 29 18 7. 2. 2. .8 13 .8 26 61 63 29 18 7. 2. 2. .6 14 .0 26 59 62 29 17 7. 2. 2. .6 15 .1 23 56 59 29 16 7. 3. 2. .6

16 .2 21 48 56 28 15 6. 3. 2. .5 IT 9( 20 47 53 27 15 6. 3. 2. .i 18 9 19 45 51 27 15 6. 3. 2. .5 19 3 18 42 48 27 16 6. 2. 2. .5 20 1 18 40 45 25 16 5. 2. 2. .6

21 .6 18 38 43 25 15 5. 2. 2. .6 . 22 .2 17 37 42 25 15 5. 2. 2. .6 23 48 15 34 41 24 14 4. 2. 2. .6 . 24 96 17 29 41 24 13 4. 2. 2. .5 25 33 16 31 41 25 12 4. 2. 2. .5

26 12 16 30 40 24 12 4. 2. 2. .6 27 7 17 27 39 23 12 4. 2. 2. .5 28 6 17 26 38 23 12 3. 1. 2. .5 29 5 It440 26 23 12 4. 2. 2. .6 3C 3 1.27P 68 22 11 4. 2. .6 31 493 91 20 4. 2.

' g 86. ) 67. .6 47. MEAN 1 .5 121 76.6 64.5 28.6 16.2 6.6( 2.8 9 2.1 1 70 1.5 MAX 68 1,44" 330 192 41 20 1 3. 9 2. .0 2. MIN .4 15 26 38 20 11 3.<) 1. b 2. .5 1. AC-FT

HTR YR 1966 TOTAL 12,226.2 MEAN 33.5 MAX 1,440 MIN 1.1 AC-FT 24.250 SANTA MARIA RIVER BASIN

11138SOO SISQUOC RIVER NEAR SISQUOC, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 JUN JUL 1 B 1.0 10 49 189 59 108 390 110 39 2 ft 1.0 31 49 158 55 114 3B2 111 41 3 9 1.1 971 48 147 55 131 376 1C2 38 4 e i.c SB 46 1'29126 53 346 378 97 37 6 e 1.0 797 47 51 289 359 96 37 6 1.5 9,eiO 44 137 46 263 355 91 39 7 If 2,55: 43 138 44 40P 361 B6 3+ 81 31 7.7 I",9 7.C 300 42 134 40 357 347 78 30 6.3 6.0 251 40 13? 40 361 314 76 24 6.0 a 5.C 200 35 129 45 716 270 73 23 12 4.C 170 35 123 426 460 236 70 25 13 3.9 145 33 121 661 420 198 61 24 14 3.7 139 34 117 380 447 173 60 21 15 3.5 127 33 114 186 455 .156 58 17 16 3.3 in 33 112 160 425 140 SB IB 17 3.2 99 33 107 168 406 129 63 19 ie 3.1 90 32 ico 123 746 124 70 22 i? 3.1 66 34 98 120 710 119 67 20 20 34 81 30 91 125 609 115 54 19 21 35 83 13 B8 122 698 105 54 17 22 2C 76 208 81 122 914 110 51 15 23 16 73 99 76 119 806 107 52 14 24 12 72 1,370 74 114 764 107 51 16 25 16 65 700 87 108 78B 107 49 17 26 13 62 370 82 159 78? 108 49 15 27 K 5* 262 69 113 600 107 46 15 2B 9.2 50 214 63 114 500 105 46 15 29 32 50 198 125 450 107 39 15 3" 13 53 2C6 _____ 134 400 107 41 14 31 49 254 227 ...... 109 ...... 13 72* 390.0 S36.3 HE AN 1 12.6 17.9 HAX 35 9,610 1,370 1B9 661 914 390 Ill 41 fIN l.i 1C 30 63 40 108 105 39 13 4C-FT J2 557 34,110 9,310 6,260 8,500 29,410 12, BOO 4,050 1,440

MBER 1968 DAY OCT NOV DEC JAN fEB MAR APR MAY JUN JUL AUG SEP I 23 7.9 ' 34 13 in 20 20 9.2 3.8 1.1 .70 .40 2 25 6.7 12 12 14 22 6B 9.2 2.7 1.0 .60 .40 3 20 6.1 12 12 22 42 9.4 4 2 .90 .70 .40 4 in 6.2 12 11 23 29 9.4 .0 .90 .6C .50 5 92 6.3 12 11 26 24 9.6 .4 1.1 .60 .SO 6 159 6.4 11 11 30 20 9.7 .2 .60 .50 .50 7 124 6.3 11 9.5 50 17 8.5 .2 .70 .50 .50 8 106 6.4 11 9.4 500 17 B.5 .1 1.0 .50 .50 9 94 6.2 1C 9.1 150 17 8.5 .2 2.7 .40 .50 10 B2 2.9 10 8.9 105 17 8.0 .8 .90 .40 .50 11 73 0 11 B.2 S3 17 B.O .1 .SO .50 .50 12 67 0 11 B.6 41 16 a.s .8 .40 .50 .50 13 60 0 11 10 66 16 9.6 .8 .50 .50 .50 14 54 r, 11 12 67 16 9.6 .1 .50 .40 .50 15 47 0 9.9 9.9 52 16 B.O .0 .50 .40 .50 16 44 ) .2 9.4 45 16 7.5 .0 .40 .40 .60 17 4d 0 .7 17 50 16 6.6 .7 .40 .50 .60 18 37 0 8 .8 96 39 15 5.B .2 .40 .50 .60 19 34 25 23 .B 47 3B 15 5.1 .1 .40 .50 .60 20 31 42 21 .3 32 29 14 4.B .9 .40 .50 .60 21 29 153 16 .2 27 23 14 4.4 .7 .40 .50 .60 22 26 13C 15 .2 24 20 12 4.4 .6 .50 .40 .60 23 23 45 14 .B 20 21 12 4.4 a j .70 .40 .60 24 22 33 14 .1 17 21 11 4.4 .2 .30 .40 .60 25 20 25 14 .2 16 22 10 5.1 .1 .40 .40 .60 26 18 22 13 .6 15 23 9.1 3.0 .6 .40 .40 .60 27 15 20 12 I 15 23 B.6 4.0 .4 .40 .40 .60 2B 14 19 12 20 17 20 B.B 1.2 .4 .60 .43 .60 29 11 17 12 16 IB IB B.4 2.7 .2 .60 .40 .60 30 10 54 12 14 ...... 18 9.2 3.2 .2 .40 .40 .60 31 9.2 12 17 IB - 4.1 "" .50 .40 TOTAL 1,427.2 643.4 333.4 342. B 533.0 1,655 531.1 204.4 B .2 20.50 14.70 16.20 MEAN 46.0 21.4 10. B 11.1 18.4 53.4 17.7 6.59 2 97 .66 .47 .54 MAX 159 15C 34 20 96 500 6B 9.7 .2 2.7 .70 .60 MIN 9.2 C 3.6 7.1 8.2 18 B.4 1.2 .2 .30 .40 .40 AC-FT 2,830 1,280 662 6BO 1,060 3,280 1,050 40S 77 41 29 32

HTR YR 196B TOTAL ,5,811.40 MEAN 15.9 MAX 500 MIN C AC-FT 11,530 SANTA MARIA RIVER BASIN

11138SOO SISQUOC RIVER NEAR SISQUOC, CALIF.--CONTINUED DISCHARGE, IN CUBIC FFET PER SECOND, HATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

NOV DEC JAN FEB MAR APR MAY JUN JUL 1 .60 .55 . 2 2.9 515 2,500 399 150 75 38 17 7.9 2 .60 .52 . 8 4.4 4115 2, 11C 375 145 74 35 16 6.5 3 .60 .75 1. 7.0 450 ,810 458 145 73 33 17 8.0 4 .55 .66 1. 9.8 4C6 ,600 368 140 71 32 16 6.8 5 .54 .63 .9 13 15 7.3 6 .61 .56 1. 17 1,780 ,200 483 134 67 33 14 7.7 T .65 .59 1. 23 1,120 ,000 409 131 65 33 14 7.6 B .62 .54 1. 30 980 900 382 131 64 32 14 7.0 9 .58 . 5w 1. 37- 92P BCO 361 128 62 31 14 6.5 1 .58 .53 1. 43 848 730 350 131 59 30 14 6.3 11 .58 .53 1. 50 776 342 147 57 30 13 6.3 650 34" 12 .58 .52 1. 63 728 570 121 54 31 14 6.4 13 1.1 .55 3. 53 665 510 332 121 56 30 14 6.8 14 5.2 .79 9. 35 613 46 310 120 55 30 14 6.9 15 .92 1.9 6. 20 639 40 295 117 53 28 14 7.1 16 .77 .94 9.8 10 646 37 268 113 51 25 15 7. a 17 .64 .86 10 5.0 56C 36 250 ice 49 23 15 7.6 18 .65 .84 19 3.0 592 38 240 133 45 20 14 7.4 19 .66 .84 28 834 6T5 388 235 98 50 21 14 7.1 20 .64 .82 28 .. 1,140 587 380 23G 97 50 22 14 7.2 21 .68 .76 25 3,500 .56?. 391 225 96 47 ?1 14 7.3 22 .74 .81 2C 1,750 612 374 220 95 47 22 13 7.2 23 .64 .79 15 800 667 361 215 92 47 22 13 7.1 24 .58 .80 U 1,140 4,963 361 210 90 39 21 13 7.5 25 .40 .82 9.4 14,800 12,OOC 347 20C 86 42 21 13 7.2 26 .36 .85 7 10,200 7,380 344 185 83 40 20 11 7..0 27 .38 .87 4 5,200 4,800 348 175 82 38 20 U 6.8 28 .43 .86 2 2,600 3,10C 353 165 81 43 19 U 29 .71 .82 2 1,600 160 77 48 19 13 6.7 3C .73 .85 2 1,300 367 155 75 39 19 9.1 6.6 31 .54 383 18 8.4 TOTAL 23.86 813 418.5 212.5 MEAN .77 .76 7 38 1,457 1,731 727 293 111 54.3 26.2 13.5 7.C8 MAX 5.2 1.9 28 14,800 12,000 2,500 483 150 75 38 17 8.0 MIN .36 .50 .9? 2.9 406 344 155 75 38 18 8.4 6.3 AC-FT 47 45 454 '89,613 96,160 44,70C 17,420 6,840 3,230 1,610 83C 421 CAL YR 1968 TOTAL 3,682. 20 MEAN 10.1 MAX 500 MIN .33 AC-FT 7,300 HTR YR 1969 TOTAL 131,771. 40 MfiAN 361 MAX 14 ,800 MIN .36 AC-FT 261,403

DISCHARGE , IN CUBIC FEET PER SECOND, WATiR YEAR OCTOBER i9"69 TH SEPTEMBER 197;; DAY OCT NCJV DEC JAN FEB MAR- APR MAY JUN JUL AUG SEP 1 .6 7.2 U 13 20 1,090 32 17 .6 3.4 2.4 2.1 2 .6 7.2 U 12 20 644 30 17 .4 3.4 2.4 2.0 3 .6 7.3 U 12 19 384 .."29 16 4 .4 7.5 11 12 19 320 27 16 .1 3.3 2.3 1.9 5 .6 7.5 12 12 19 435 26 13 .0 3.2 2.3 1.8 6 .6 16 12 13 19 198 23 15 .0 .2 2.3 1.8 7 .6 13 12 12 18 161 25 14 .8 .1 2.3 1.7 8 .6 13 13 12 18 14'Q 25 14 .4 .1 2.3 1.7 9 .4 13 13 It 19 122 23 13 .2 .1 2.2 1.6 13 .1 12 11 22 33 110 21 13 .2 .0 2.2 1.6 11 .3 9.6 U 26 33 95 20 13 .1 .0 2.2 1.6 12 .0 7.5 12 22 31 7T 19 12 .0 .0 2.2 1.5 13 .4 7.5 11 2C 28 62 19 12 .9 .9 2.2 1.5 14 ,7 7.5 12 20 27 58 21 11 .8 2.9 2.2 1.4 15 .7 7.5 12 21 24 59 22 U .7 2.9 2.2 1.4 16 .6 8.1 12 140 22 57 21 10 .6 2.9 2.2 1.4 17 .5 8.5 U 180 22 53 20 10 .5 2.8 2.2 1.3 18 .7 7.9 11 66 20 50 20 9.8 .4 2.8 2.2 1.3 19 .0 8.2 11 47 20 46 20 ,5 7.5 11 39 20 44 18 9.6 .2 2.7 2.2 1.2 21 .5 7.5 12 33 7.0 42 18 9.3 .1 2.7 2.2 1.2 22 .5 9.2 13 29 19 41 19 9.0 23 .5 7.6 12 27 19 39 18 8.7 .9 2.6 2.2 1.1 24 .1 7.5 11 26 18 36 17 8.4 .8 2.6 2.2 l.l 23 .3 7.5 12 23 18 36 16 8.0 .7 2.6 2.2 1.0 26 .2 7.5 13 24 18 34 15 7.7 .7 2.5 2.2 1.0 27 .4 7.5 14 73 18 34 15 7.4 .6 2.5 2.3 1.0 28 .9 7.6 14 23 226 33 16 7.1 .6 2.5 2.3 .90 29 .5 U 14 22 - 32 18 T.O .5 2.4 2.2 .90 33 .3 11 13 22 33 18 6.9 .4 2.4 2.2 .90 31 9 - 12 21 32 2.4 2.1 TOTAL 221.0 267.4 375 991 807 4,597 632 344.3 14 .7 88. T 69.3 42.40 MEAN 7.13 8.91 12.1 32.0 28.8 148 21.1 11.1 4 76 2.86 2.24 1.41 MAX 8.4 16 14 180 226 1,090 32 17 .6 3.4 2.4 Z.I MIN 6.0 7.2 11 12 18 32 15 6.8 .4 2.4 2.1 .90 AC-FT 438 530 744 1,973 1,600 9,120 1,250 683 .283 176 137 84 CAL YR 1969 TOTAL 132,359. 50 MEAN 363 MAX 14 ,800 MIN 2.9 AC-FT 262,500 HTR YR 1970 TOTAL 8,578. oo MEAN 23.5 MAX 1 ,090 MIN .90 AC-FT 17,010 SANTA MARIA R1V1R BASIN

11139000 LA BR1A CRB1K NEAR SISQUOC, CALIF. LOCATION.--Lit 34'Sl'lO", long 120 0 li'S5", in SPs see.13, T.9 N., R.32 W., Santa Barbara County, on right bank 2,100 ft upstream from mouth and 5,5 miles east of Sisquoe. DRAINAGE AREA.--93.6 sq mi (revised). PERIOD OP RECORD.--October 1943 to Stpttmber 1970. CAGE.--Water-stage recorder. Altitude of gage is 550 ft (from topographic map). AVERAGE DISCHARGE.--27 years, 7.28 efs (5,270 acre-ft per year}; median of yearly mean discharges, 0.8 efs (580 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in fget), Annual maximum discharge (*) and peak discharges above base (30 cfs), water years 1966-70 Date Time Diseh, G.H. Date Time Diseh. G.H. Date Time Diseh. G.H. Dec. 29, 1965 2130 *227 3.33 Apr. 21, 1967 2200 784 4.93 Feb. 6, 1969 0830 585 3.72 Fib. 24, 1969 1930 5,100 4.67 Dec, 6, 1966 1600 *il,200 8.23 Mar. S, 1968 0830 "322 3,64 Jen. 24, 1967 1700 331 4.58 Mar. 2, 1970 0500 *94 1.56 Apr. 7, 1967 1100 3SS 4.33 Jan, 22, 1969 0600 1,290 4.63 Mar. 5, 1970 0500 93 l.SS Apr. 11, 1967 0600 370 4.32 Jan. 25, 19b!l 1100 *5,820 6,43 No flow for long periods in each year, Period of record: Maximum discharge, 11,200 cfs Dec. 6, 1966 (gage height, 8.23 ft), from rating curve extended above 2,000 cfs on basis of slope-area measurement of peak flow; no flow for most of each year. REMARKS.--Records good except those for 1969, which are poor No .gage-height _ record Feb. 24 to July 1, 1969. Perennial low flow from basin above sinks beneath streambed before reaching station No regulation or diver- slon above station. DISCHARGE, CUBIC FiET PER SECOND, H/ifER YiAR OCTOBER 1969 TO SEPTEMBER 1966 MUV DEC JAN PER MAR APR C 46 4.9 .3 P 25 4.2 .3 C IT 3.T .1 C 12 3.2 9 n a. 3 3.7 5 J T.9 t 0 . 17 . 0 14 . 0 12 , ' 10 n . B. . 0 . T. , 0 . . 0 . . 0 0 . .90 IT 0 . .90 ia n . .90 19 0 , .80 20 0 .BO 21 0 . .TO 22 0 B .TO 23 0 , .TO 24 0 , .TO 29 0 .60 26 D . .60 2T 0 .60 28 s 2, .40 29 30 2 .30 30 95 .7 .20 31 jj T 0 TOTAL C lao 173.0 162.6 30. TO 0 MEAN 0 5.81 5.98 5.81 .99 0 MAX C 95 46 IT 2.3 0 MIN 0 3 1.2 2.3 0 C AC-PT C 39T 343 323 61 0 CAL YR 1969 1 509. 1C MEAN 1.39 MAX 102 HIN 0 AC-PT 1,010 L 946.30 MIAN 1.5C MAX 95 MIN 0 AC-PT 1,080 SANTA MARIA RIVER BASIN

11139000 LA BREA CREEK NEAR SISQUOC, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 DAY JUN JUL 1 C 46 5.0 4 85 14 .90 2 J 39 4.5 3 75 13 .BO 3 1 32 4.3 2 70 12 .40 4 26 4.2 6 65 12 .30 5 49 22 4.1 10 60 11 .30 6 4.2CO 17 4.0 62 55 11 .20 7 825 16 3.6 232 50 IP .19 a 168 16 3.2 150 45 9.8 .10 9 73 15 2.8 8B 41 9.3 .10 I" 44 12 .10 11 33 9.8 2.0 246 34 B.3 0 12 27 3.3 11 158 32 7.9 0 13 24 7.5 37 111 30 7.5 0 14 19 6.3 44 88 28 7.5 0 15 14 5.7 28 92 25 7.5 0 16 12 5.7 23 76 24 7.5 C 17 11 5.5 22 64 22 7.5 0 18 9.3 5.5 20 291 20 8.8 3 19 7.9 5.4 18 423 IB 7.5 0 20 6.8 5.3 16 322 17 6.4 0 21 6.4 3 5.2 15 411 17 5.7 0 22 6.1 1 5.1 14 502 17 5.1 0 23 5. a .5 5.0 13 403 16 4.5 0 24 5.5 11 6.C 11 300 16 3.9 0 25 5.2 122 7.C 7.9 225 15 3.4 0 26 4.9 55 6.5 8.B 200 14 2.9 0 27 4.6 36 6.3 7.9 175 14 2.3 0 28 4.4 28 5.5 7.9 159 14 1.9 0 29 4.Z 24 7.5 ICO 14 1.6 3 30 3.9 31 7.1 90 14 1.2 0 31 42 14 9 OTAL C 0 5,582.7 527. B 351.0 431.2 5,300 999 219.8 3.30 EAN U 0 180 17.3 12.5 12.9 177 32.2 7.33 .11 AX 0 0 4,200 122 46 44 502 85 '1.214 .90 IN 0 0 0 1.3 5.3 2.0 26 14 0 C-FT 0 0 11,070 1,050 696 796' 10,510 1,980 436 6.6 CAL YR 1966 TOTAL 5,949.00 MEAN 16.3 MAX 4,230 MIN 0 AC-FT 11, BOO

DISCHARGE, IN CUBIC FEET PER SECOND , WATER YEAR OCTOBER 1967 TO SEPTEMBER 196i JUN 1 0 1.9 2 0 7.1 3 0 3.9 4 0 2.3 5 0 1.8 6 0 1.2 7 0 .90 8 1C4 .40 9 29 .20 1J 10 .10 11 5.1 .13 12 1.9 .10 13 8.3 .10 14 B.8 .10

TOTAL 0 0 219.3 MEAN 9 0 7.07 MAX 0 0 104 MIN 0 0 AC-FT 0 0 CAL YR 1967 TOTAL 7,802.10 HTR VR 1968 TOTAL 239.70 SANTA MARIA RIVER BASIN

11139000 LA BREA CREEK NEAR SISQUOC, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969

480 400 34C 290 .38 240 .28

24'411 200 180 2CP 16C 160 140 125

21 7.2 107 57 27 .0 22 712 111 65 26 .7 23 283 23R 62 25 .4 24 438 2,300 58 24 .1 75 2,95C 2,20' 54 24 .B 26 2.00C 1.20C 50 23 .6 27 1,0'iO l.OCC 46 23 .4 28 50C 60C 42 22 .2 250 22 .0 3C 130 34 21 .90 31 100 ...... 35 TOTAL WEAN S C ? 294 355 126 34.0 12 7 t.15 'MAX 0 C 0 2,950 2,200 480 80 21 6.6 WIN 0 0 ' J 52 34 21 6 B .90 AC-FT 53 247

)

DISCHARGE, IN CUBIC FEET PER SFCONO, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970

MOV DEC JAN FEB MAR APR MAY JUN JUL

1 0 34 1.* COT* 1.4 C 0 35 1.4 0 0 27' l.Z 0 C 74 .97

C : 3B .80 C 0 25 .80 0 0 IB .80 C .ID 13 .80 i .PC 12 .64

31

TOTAL MEAN MAX MIN AC-FT 526 SANTA MARIA RIVER BASIN

11139350 POX1N CREEK NEAR SISQUOC, CALIF. LOCATION,--Lat 34°48'58", long i20°13'26", In. Lt laguna Grant, Stntt Barbara Count/, en left upstream wlngwall to culvert on Poxen Can/on Road, 3.0 miles upitream from mouth and 3.7 miles southeast of Sisquoe, DRAINAGE AREA.--16.8 sq mi, PERIOD OF RECORD,--September 1965 to September 1970. GAGE.--Water-stage recorder. Altitude of gage Is 6SO ft (from topographic map). AVERAGE DISCHARGE.--S years, 0.61 efi (442 acre-ft per year). EXTRiMES.--Maximum* and minimums (discharge in cubic feet per second, gage height In feet). Annual maximum discharge (*) and peak discharges above base (IS efs), September 1965 to September 1970 Date Time Biseh, G.H. Bate Time Diseh. G.H. Date Time Diseh. G.H. 196S C») - Mar. 8, 1968 0300 *2.3 1,27 Apr, S, 1969 1730 18 1,65 Dee, 29, 1965 0300 «2,0 1.26 Jan. 26, 1969 0900 99 3.42 Peb. 28, 1970 0500 *2,8 1.27 Feb. 6, 1969 1445 19 1.70 Apr. 21, 1967 1700 »5.7 1.33 Feb. 24, 1969 1830 "271 4,91 a No flow for entire month. Annual minimum daily discharge, September 1965 to September 1970 Wtr yr Date Discharge Wtr yr Date Discharge 1965 intire period 0 1968 Many days 0 1966 Long periods 0 1969 Jan. 2, 3, 1969 .03 1967 do. 0 1970 Sept.28, 29, 1970 .21 Period of record: Maximum discharge, 271 cfs Feb. 24, 1969 (gage height, 4.91 ft), from rating curve extended above 24 efs on basil of slope-conveyance measurement of peak' flow; no flow for manx days in most years. REMARKS.--Records good. Small diversion dam foj irrigation of about 160 acres above gage. Some pumping from wells along stream above gage. No flow during September 1965, DISCHARGE) IN CUBIC. FEST f>IR SECOND) hATER VIA* OCTOBER 1963 TO SiPTEMBtR 1966 DAY OCT NOV DEC JAN FfB MAR APR MAY JUN JUL 1 c .to .20 .10 .10 .10 .1C .1C . i C .13 .20 .10 .10 .10 .10 .10 0 .10 .10 .10 .10 .10 .10 .1C » .lu .10 .1C .1C .10 .10 .10 3 .IS .10 .10 .10 .10 .10 .in i .10 .1C .10 .1C .1C .10 .10 o .10 .10 .IP .10 .10 .1C .10 0 .1C .10 .1C .10 .10 .10 .10 n .19 .10 .10 .10 .10 .10 .w , .1? .10 .10 .10 .1C .10 .1C C .1C .1J .10 .10 .10 .10 .10 C .13 .1 ' .13 .10 .10 .10 .10 C .19 .10 .10 .10 .10 .10 .10 C .19 .10 .10 .1C .10 .10 .10 C .10 .10 .10 .10 .10 .10 .10 0 .10 .10 .10 .13 .10 .10 .10 0 .10 .10 .ll, .10 .10 .10 .10 0 .1C .10 .10 .10 .10 .10 .1C 0 .1C .10 .13 .10 .1C .10 .10 ft .10 .10 .1C .10 .10 .10 .10 0 .10 .10 .10 .10 .10 .1C .10 0 .10 .10 .10 .10 .10 .10 .10 .20 .10 .10 .10 .10 .10 .10 .10 .20 .10 .10 .IP .10 .10 .10 .10 .10 .19 .10 .10 .10 .1C .10 .10 .10 .10 .10 .10 .10 .10 .10 .10 .10 .10 .10 .1C .10 .10 .10 0 .10 .10 .10 .1C .10 .10 .13 0 29 .10 .60 .13 »**.* .10 .10 .10 0 3C .10 .2'! .23 .10 .10 .10, 0 31 .23 .10 .10 .10 TOTAL 0 1.00 3.BO 3.40 2.2.BC BO 3.10 3.00 3.1C3.10 2.6G 0 0 MEAN .C33 .12 .11 .10 .10 .10 .10 .067 0 MAX 0 .20 .63 .29 .19.10 .10 .10 .10 .10 0 3 MIN 3 .10 .13 .10 .10 .13 .10 0 0 AC-FT 0 >L 22. BO .MEAN .063 MAX .60 KIN 0 AC-FT 49 SANTA MARIA RIVER BASIN

11139350 FOXEN CREEK NEAR SISQUOC, CALIF.--CONTINUED OISCHARGEt IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 NOV DEC JAN FEB MAR APR MAY JUN JUL 1 0 .10 .10 .20 .10 .30 .40 .20 .20 .10 .13 2 0 .10 .10 .10 .10 .30 .30 .20 .20 .10 .10 3 0 .10 .10 .1C .10 .30 .30 .10 .20 .10 .10 4 0 0 .10 .10 .1C .60 .30 .10 .20 .10 .10 i 3 .20 .10 .10 .10 .40 .30 .10 .20 .10 .10 6 0 1.3 .10 .10 .10 .40 .30 .10 .20 .10 .10 7 .20 .70 .10 .1C .10 .80 .20 .10 .20 .10 .10 a 0 ..10 .10 .10 .10 .40 .20 .2C .20 .10 .10 9 0 .10 .10 .10 .10 .30 .20 .20 .20 .10 .10 IS 0 .10 .10 .1C .10 .40 .20 .20 .10 .1C .10 11 c .10 0 .10 .10 .60 .20 .10 .10 .10 .10 12 c .10 0 .1! .20 .40 .20 .10 .10 .10 .10 13 c . u 0 .1C .20 .40 .20 .10 .10 .10 .10 14 3 .10 3 .10 .20 .40 .20 .10 .IB .10 .10 15 3 .10 1 .1C .10 .40 .20 .10 .10 .1C .10 16 5 .10 0 .10 .1C .4C .20 .10 .10 .1C .10 17 C .is 0 .10 .10 .50 .20 .10 .10 .10 .10 18 c .1C c .10 .10 .80 .20 .20 .10 .10 .19 19 0 .10 0 .1C .10 2.3 .20 .10 .10 .1C .10 20 .10 .u 0 .10 .10 1.3 .20 .10 .10 .10 .10 21 .10 .10 0 .10 .10 2.6 .20 .10 .10 .10 .10 22 .10 .10 .40 .10 .10 3.7 .20 .10 .10 .1C .20 23 .10 .10 .10 .10 .10 1.8 .20 .10 .10 .10 .20 24 .1C .10 2.2 .10 .10 l.B .20 .10 .10 .10 .20 25 .10 .10 .90 .in .10 1.3 .20 .10 .10 .10 .10 26 .10 .10 .40 .in .10 .80 .20 .20 .10 .10 3 27 .lu .10 .30 .10 .10 .60 .20 .20 .10 .10 .10 21 .1C .10 .30 .10 .10 .60 .20 .20 .10 .10 .20 29 .10 .10 .20 .10 .50 .20 .20 .10 .10 .20 30 .1C .10 .20 .20 .40 .20 .20 .10 .10 .20 31 .10 .20 .30 - .20 .10 .10 TOTAL 0 1.30 4.40 6.23 2.91 3.70 29.80 6.90 4.10 4.00 3. 1C 3.50 MEAN 0 .C43 .16 .20 .10 .12 .86 .22 .14 .13 .10 .12 MAX C .20 1.3 2.2 .20 .30 3.7 .40 .20 .20 .1C .20 MIN 0 0 1 \) .10 .10 .30 .20 .10 .10 .10 0 AC-FT 1 2.6 9.7 12 5.8 7.3 51 14 B.I 7.9 6.2 6.9 CAL YR 1966 TOTAL 24. 2C MEAN .066 MAX 1.3 MIN 0 AC-FT 48 NTR YR 1467 TOTAL 66.40 MEAN .IB MAX 3.7 MIN 0 AC-FT 132

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1967 TO SEPTEMBER 1968 NOV DEC JAN FED MAR APR MAY JUN JUL 1 .10 0 .10 .10 .20 .10 .30 .10 .10 .10 .04 .04 2 .10 0 .10 .10 . 2C .10 .30 .10 .10 .10 .C4 .04 0 .13 .19 .19 .21 .10 .20 .10 .10 .10 .04 .04 0 .10 .10 .10 .20 .10 .20 .10 .10 .10 .04 .04 0 .1C .10 .10 .10 .\", .20 .10 .10 .10 .03 .04 C .13 .10 .10 .18 .10 .20 .10 .10 0 .04 .04 0 .10 .10 .10 .10 .30 .20 .10 .10 0 .03 .04 8 0 .10 .10 .1C .1C .6C .2C .10 .10 .10 .03 .04 9 0 .10 .10 .10 .10 .20 .20 .10 .10 .10 .03 .04 10 0 .13 .1C .20 .20 .10 .20 .10 .1C 0 .03 .34 11 0 .10 .1C .20 .20 .10 .20 .10 .10 .OS .04 .04 12 0 .10 .13 .20 .70 .10 .20 .10 .10 .05 .05 .04 13 0 .10 .10 .10 .20 .30 .20 .10 .10 .06 .05 .04 14 0 .10 .1C .10 .20 .10 .20 .10 .10 .07 .04 .04 IS 0 .1C .10 .10 .20 .10 .20 .10 .10 .07 .03 .04 16 0 .1C .1C .10 .2C .10 .20 .10 .10 .07 .03 .04 17 0 .10 .1C .10 .30 .10 .10 .10 .10 .05 .03 .03 18 0 .10 .20 .10 .20 .10 .10 .10 .10 .04 .03 .03 19 0 .20 .20 .10 .20 .10 .10 .10 .10 .04 .04 .04 20 0 .30 .10 .10 .20 .10 .10 .10 .10 .04 .09 .04 21 c .20 .10 .10 .20 .10 .10 .10 .13 .04 .OS .04 22 0 .10 .10 .10 .20 .10 .10 .10 .10 .04 .06 .04 23 0 .10 .10 .10 .10 .10 .10 .10 .10 .05 .05 .04 24 0 .10 .10 .10 .10 .10 .10 .10 .10 .05 .04 .04 25 0 .10 .10 .20 .10 .10 .10 .10 .10 .05 .04 .04 26 0 .10 .10 .20 .10 .10 .10 .10 .10 .05 .04 .04 27 0 .10 .10 .30 .10 .10 .10 .10 .10 .04 .05 .04 28 0 .10 .10 .20 .10 .10 .10 .10 .10 .04 .05 .04 29 0 .10 .10 .20 .10 .10 .10 .10 .10 .04 .04 .04 30 0 .20 .10 .20 ...... 10 .10 .10 .10 .04 .04 .04 31 0 ...... 10 .20 .10 .1C .04 .04 TOTAL .20 3.30 3.30 4.20 4.70 4.10 4.BC 3.10 3.00 1.72 1.24 1.18 MEAN , 007 .11 .11 .14 .16 .13 .16 .10 .10 .056 .040 .039 MAX .10 .30 .20 .30 .30 .60 .30 .10 .10 .10 .06 .04 MIN 0 0 .10 .10 .10 .10 .10 .10 .10 0 .03 .03 AC-FT CAL YR 1967 TOTAL «7.00 MEAN .IB MAX 3.7 MIN 0 AC-FT 133 HTR YR 196B TOTAL 34.84 MEAN .091 MAX .60 MIN 0 AC-FT 69 SANTA MARIA RIVER BASIN

11139350 FOXEN CREEK NEAR SISQUOC, CALIF.--CONTINUED

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAH OCTOBER 1968 TO SEPTEMBER 1969

1 .1C . 36 .06 .C4 3.0 19 1.7 l.C .76 .65 .48 .4B 2 .09 .06 .06 .C3 2.4 IS 2.0 1.0 .76 .65 .48 .48 1 .06 .06 .06 .C3 1.8 12 2.4 1.0 .76 .65 .48 .4B 4 .^5 .06 .06 .04 1.5 IB l.B .94 .76 .65 .48 .44 5 .48 .53 6 .'.5 .06 .on .05 13 .51 7 .86 .16 .OB .06 8.5 7.1 2.2 .97 .76 .65 .48 .51 a .65 .48 .52 J4 .06 .37 97 1.9 1.2 .76 .65 .56 .48 .43 25 .06 .04 .06 32 90 i.e 1.2 .76 .65 .56 .48 .43 26 .06 .04 .06 45 46 1.7 1.2 .76 .65 .56 .4B .43 2T .06 .C6 .06 17 26 .50 28 .06 .07 .08 9.6 27 1.6 1.0 .76 .65 .56 .48 .50 29 .06 .C6 .07 7.2 1.5 1.0 .76 .65 .48 .48 .50 3C .06 .06 .06 4.3 1.5 l.'J .76 .65 .48 .48 .50 31 .12 .48 .48

EAN .064 .C56 .064 3.9? 14.0 4.74 1.66 .82 .71 .60 .48 .48 AX .12 . u7 .11 45 97 19 6.4 l.C .76 .65 .48 .53 IN .1)4 .04 .05 .C3 .64 1.5 1.0 .76 .65 .48 .48 .43 C-FT 3.9 3.3 4.C 241 775 291 99 50 42 37 30 29

DISCHARGE , IN CUBIC FEFT PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTiMf ER 1970 CAY OCT JUN JUL AUG SEP

1 .52 .47 .59 .49 .65 l.l .52 .55 .35 .39 .32 .40 2 i .53 .53 .32 .40 .34 .38 4 .48 .49 .56 .48 .65 .99 .53 .54 .32 .34 .30 .34 5 .47 .53 .57 .48 .65 .75 .55 .54 .33 .31 .31 .32 b .49 .72 .57 .39 .65 .56 .55 .54 .32 .31 .29 .28 7 8 .45 .48 .53 .49 .56 .56 .54 .54 .34 .33 .28 .27

11 .49 .47 .52 .47 .56 .56 .52 .53 .33 .32 .34 .29 12 .50 .49 .55 .42 .56 .56 .52 .59 .27 .35 .34 .31 13 .50 .33 14 .52 .28 .37 .40 .32 15 .52 .56 .55 .50 .60 .61 .52 .56 .28 .37 .40 .32

16 .58 .53 .56 1.1 .62 .65 .55 .55 .28 .36 .*C .30 17 .48 .51 .55 .54 .65 .65 .53 .57 .29 .34 .40 .29 18 .48 .50 .55 .48 .65 .65 .51 .61 .33 .34 .40 .29 19 .50 .53 .56 .50 .65 .70 .52 .62 .30 .31 .40 .31 2f .48 .53 .56 .53 .57 .63 .51 .61 .31 .25 .40 .34 21 .46 .55 .56 .50 .57 .61 .51 .60 .31 .24 .40 .33 22 .52 .56 .56 .58 .33 .26 .40 .30 23 .54 .55 .56 .54 .59 .60 .56 .58 .35 .28 .40 .28 24 .56 .56 .54 .65 .56 .60 .57 .56 .35 .28 .40 .27 25 .54 .57 .58 .65 .58 .59 .59 .46 .37 .28 .40 .26 26 .56 .54 .57 .40 .36 .28 .40 .24 27 .53 .59 .56 .38 .27 .40 .23 28 .53 .58 .56 .65 1.1 .50 .56 .41 .38 .26 .40 .21 29 .51 .59 .48 .66 .52 .59 .42 .38 .27 .35 .21 30 .50 .57 .4P .67 .54 .57 .37 .40 .29 .3B .23 31 .49 TOTAL 15.64 15.95 16.96 17.15 17.47 19.17 16.23 16.39 9.82 9.SS 11.16 8.86 MEAN .50 .53 .55 .55 .62 .62 .54 .53 .33 .32 .36 .30 MAX .58 .72 .59 1.1 1.1 1.1 .59 .62 .40 .40 .40 .40 MIN .45 .47 .4B .39 .56 .49 .51 .37 .27 .24 .24 .21 AC-FT 31 32 34 34 35 3B 32 33 19 20 22 IB

WTft Yft 1970 TOTA SANTA MARIA RIVER BASIN

11139500 TEPUSQUET CREEK NEAR SISQUOC, CALIF. LOCATION.--Lat 34°52'21", long 120°14'37", in NE>( sec.9, T.9 N., R.32 W., Santa Barbara County, on downstream wingwall of right bridge abutment, 1.1 miles upstream from mouth and 3 miles east of Sisquoc. DRAINAGE AREA.--28.7 sq mi (revised]. PERIOD OF RECORD.--October 1943 to September 1970. GAGE.--Water-stage recorder. Concrete control since July 1957. Altitude of gage is 500 ft (from topographic map). Prior to Dec. 9, 1948, at datum 0.9 ft higher. AVERAGE DISCHARGE.--27 years, 1.16 cfs (1,130 acre-ft per year); median of yearly mean discharges, 0.4 cfs (290 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base (150 cfs, revised), water years 1966-70 Date Time D isch. G.H. Date Time Disch. G.H. Date Time Disch. G .H. Nov. 23, 1965 1915 *1.9 2.51 Apr. 19, 1967 0030 94 3.08 Jan. 25, 1969 0845 782 S .46 Apr. 22, 1967 0645 68 2.91 Feb.. 6, 1969 1600 171 3 .23 Dec. 6, 1966 1445 * 788 5.48 Feb. 24, 1969 1845 *785 5 .47 Jan. 24, 1967 1430 141 3.07 Mar. 8, 1968 0530 1.3 2.33 Mar. 16, 1967 1430 12 2.21 Mar. 1, 1970 0645 *61 2,.64 Apr. 11, 1967 1900 18 2.50 Jan. 22, 1969 0300 169 3.76 al minim Wtr yr Date Disc harge Wtr yr Date Discharge 1966 Many days 0 1969 Oct. 24, 25, 1968 .03 1967 Oct. 29, 1966 0 1970 Sept. 28-30, 1970 ,11 1968 Aug. 2, 1968 0 Period of record: Max:Lmum di scharge, 788 cfs Dec. 6 , 1966 (gage height, 5.48 ft) , froin ratini; curve e xtended above 220 c fs on basis of compu tatio n of peak flow at contracted opening; n.0 floii at tirnes in some y ears. REMARKS.--Records good. No regulation abo diversion by pumping from wells along stream to ir gate about 100 acres above station. REVISIONS.--WSP 1928: Drainage area.

DISCHARGE, IN CUBIC FEEI PER SECOND, UAT6R YEAR OCTOBER 1965 TO SEPTEMBER 1966 CAY JUN JUL AUG SEP

1 .1C ^ .35 .50 .90 .90 .90 .60 .40 .20 .1C 0 2 .IP .1C .30 .50 .90 .90 .90 .61 .40 .20 .10 .10 3 .13 .10 .30 .50 .90 .90 .90 .60 .40 .20 .10 .10 4 .10 .30 .10 5 .n .1 < .20 .50 .90 .90 .90 .60 .40 .20 .10 .10 t .10 .10 .20 .50 l.C .90 .90 .60 .30 .20 .10 .10 7 .i" .10 .20 .40 .90 .90 .90 .60 .30 .20 .10 .10 8 .10 .10 .20 .40 .90 .90 .90 .70 .40 .20 .10 .10 9 .10 .1C .20 .50 .80 .0 .90 .70 .30 .20 .10 .10 10 .10 .10 .20 .50 .80 .0 .80 .70 .30 .20 .10 .10 11 .10 .1C .20 .50 .8C .0 .80 .60 .3C .20 0 .10 12 .10 .10 .30 .50 .80 .0 .80 .5C .20 .20 .10 .10 13 .20 .20 .30 .50 .80 .1 .BC .60 .20 .20 .1C .10 14 .1C .2C .30 .50 .60 .1 .70 .60 .20 .20 .1C .10 15 .10 0

16 17 .20 .5-. .30 .40 .90 .90 .70 .90 .30 .20 .10 .10 18 .20 .60 .30 .40 .90 .90 .70 .60 .20 .10 0 .13 19 .20 .10 .1C .20 20 .10 .50 .30 .40 .BO .80 .70 .50 .20 .20 .10 .10 21 0 .50 .30 .40 .bC .90 .7C .60 .20 .20 .10 .10 22 0 .50 .30 .40 .80 .90 .70 .60 .20 .10 .1C .10 23 0 l.l .30 .40 .80 .90 .70 .50 .10 .10 .10 .10 24 0 .40 .3D .40 .90 .90 .60 .50 .20 .20 .10 .10 25 0 .40 .30 .40 .90 .90 .70 .50 .20 .20 .10 .10 26 0 .30 .30 .40 .90 .90 .70 .50 0 .20 .10 .10 27 0 .30 .30 .40 .80 .90 .70 .50 .10 .20 .10 .10 3 .10 .10 29 0 .30 .70 ,5J .90 .70 .50 .20 .20 .10 .20 3u 0 .30 .60 .83 , .90 .60 .50 .20 .20 .10 .20 31 0 ------.50 .80 ------.90 ----- .40 ...... 10 .10 _____ TOTAL 2.50 6.60 9.50 14.50 24.10 28.70 23.20 17.70 7.30 5.70 2.90 3.10 MEAN .081 .29 .31 .47 .86 .93 .77 .57 .24 .18 .094 .10 MAX .20 1.1 .70 .80 1.0 1.1 1.0 .70 .40 .20 .10 .20 MIN 0 C .23 .40 .BO .80 .60 .40 0 .10 0 0 AC-FT 5.0 17 19 29 48 57 46 35 14 11 5.8 6.2 277 SANTA MARIA RIVER BASIN

11139500 TEPUSQUET CREEK NEAR SISQUOC, CALIF.--CONTINUED DISCHARGf, IN CUBIC FEET PER SECOND, HATER YEAR OCTOBER 1966 TO SEPTEMBER 1967 OCT NOV DEC JAN FEB MAR APR MAY JUN ML I .10 .10 .30 .40 .9 2. 9. 2.8 2 1.0 .56 2 .20 .10 .50 .50 .7 1. 8. 2.3 l.C .54 3 .20 .10 .40 .60 .5 1. 7. 2.4 1.0 .53 4 .20 .10 .30 .60 .8 1. 6. 2.4 1.0 .52 5 .20 .1C .y. .TC .9 1. 6. 2.4 1.0 .54 6 .20 .10 476 .70 .a i. a .8 2.7 1.0 .53 7 .23 .30 L5B .TO .6 1. .4 2.9 1.0 .53 8 .10 .20 13 .70 .8 1. .0 2.9 1.0 .50 9 .10 .20 2.4 .6C .C 1. .6 3.1 1.0 .53 10 .10 .20 1.5 .60 .2 1. 0 .0 2.8 l.C .48 11 .20 .2C 1.1 .60 .2 1. 1 .4 2.7 .90 .47 12 .20 .20 l.l .70 .2 1. 1 .9 2.5 .90 .48 13 .10 .20 1.1 .80 .3 2. . .6 2.1 .90 .49 U .10 .20 1.1 80 .2 2. , 3.5 2.0 .90 .49 15 .10 .20 1.0 .<50 .2 2. 3.4 1.9 .90 .50 16 .10 .2C .90 .90 .3 4. 1.2 3.3 1.9 .80 .45 17 .10 .20 .90 1 .C .3 4. .90 3.2 1.9 .80 '.4.44 IB .10 .20 .80 l.l .2 3. 32 3.4 1.7 .89 19 .10 .3C .TO 1.2 .4 2. 80 3.1 1.6 .80 .4 2) .10 .30 .70 1.3 .6 2. 28 3.1 1.4 .BC .4

21 .20 .30 .70 1.4 .3 2. 12 3.2 1.2 .TC .4 22 .20 .30 -.7 a 1.4 .2 2. 56 3.5 1.2 .70 .4 23 .10 .30 .63 1.4 ' .4 2. 45 3.5 1.2 .70 .44 2* .10 .30 .60 28 .7 2. 37 3.4 1.2 .7C .42 2! .10 .30 .51 20 .5 2. 26 3.1 1.3 .70 .44 26 .10 .30 .50 6.5 .7 1. 2u 3.2 1. .60 .43 27 .13 .30 .50 3.3 .5 1. 17 3.0 1. .60 .40 28 .13 .41 .49 3. A .0 1. 14 3.0 1. .60 .43 29 0 .30 .50 3.2 1. 12 3.3 1. .60 .43 30 .10 .30 .40 5.2 1. 10 2.8 1. .59 .42 31 .10 .61 25.60 14.29 MEAN .13 .23 21.6 3.11 3 52 2.16 14.5 4.33 1.97 1 .83 .48 MAX .20 .40 476 28 .7 4.8 80 9.C 3.1 1.0 .56 M1N a .10 .30 .40 .5 1.4 .90 2.8 1.2 .59 .40 AC-PT 7.9 13 1(330 191 96 133 865 266 117 i 51 28

WTR YR 1967 TOTAL 1(644. 99 MEAN 4.51 MAX 476 WIN 0 AC-FT 3(260

D1SCHAR6S, IN CUBIC FEET PER SECOND. HATER YEAR OCTOBER 1967 TO SEPTEMBER 1968

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .41 .27 .35 .33 .33 .42 .72 .76 .46 .12 .08 .07 2 .41 .28 .35 .33 .32 .40 .63 .72 .45 .20 0 .08 .42 .29 .34 .33 .32 .39 .60 .67 .45 .18 .02 .10 .42 .28 .34 .33. .32 .18 .60 .70 .44 .15 .02 .13 .39 .27 .36 .33 .33 .40 .6? .69 .46 .13 .02 .12

.38 .27 .35 .33 .34 .38 .61 .64 .47 .09 .04 .06 .JT .28 .36 .32 .33 .4T .63 .65 .46 .16 .04 .07 .37 .30 .35 .33 .32 .61 .62 .66 .47 .21 .03 .09 .37 .31 .35 .33 .35 .43 .37 .61 .46 .18 .07 .12 1C .37 .31 .36 .33 .35 .41 .59 .62 .40 .11 .06 .14

11 .33 .29 .36 !" .35 .38 .67 .65 .43 .10 .07 .15 12 .33 .'0 .36 U3 .36 .40 .66 .64 .39 .03 .07 .16 13 .33 .31 .37 .33 .38 .69 .63 .64 .30 .09 .09 .19 14 .33 .31 .37 .33 .38 .51 .67 .63 .37 .08 .10 .11 15 .32 .31 .33 .33 .38 .30 .72 .64 .36 .12 .10 .11

16 .30 .31 .S3 .33 .38 .33 .77 .62 .36 .07 .09 .04 IT .30 .13 .31 .33 .38 .49 .77 .61 .36 .09 .03 .14 1« .31 .33 .35 .33 .38 .50 .79 .62 .36 .08 .04 .14 19 .31 .37 .33 .33 .18 .53 .79 .57 .32 .05 .02 .08 20 .32 .36 .32 .33 .38 .53 .81 .36 .34 .07 .08 .03

21 .29 .36 .32 .33 .38 .50 .82 .59 .29 .09 .08 .03 22 .30 .34 .31 .33 .38 .49 .74 .60 .28 .12 .04 .03 23 .31 .32 .31 .33 .40 .49 .72 .36 .26 .10 .04 .03 24 .32 .32 .32 .33 .40 .42 .74 .57 .25 .09 .07 .01 25 .32 .32 .32 .33 .40 .45 .72 .5t .22 .03 .06 .03

26 .32 .34 .32 .33 .40 .30 .71 .43 .25 .06 .02 .04 27 .31 .34 .32 .13 .40 .50 .71 .46 .26 .11 .03 .06 28 .30 .35 .33 .33 .42 .48 .68 .41 .26 .12 .02 .07 29 .30 .35 .33 .33 .43 .32 .69 .12 .23 .10 .08 .08 30 .30 .40 .32 .33 .34 .74 .47 .20 .10 .08 .06 31 .29 - .31 .35 .60 .47 .11 .05

TOTAL 10.45 9.52 10.47 13.24 10.67 14.84 20.76 18 .59 10.61 3.36 1.68 2.61 MEAN .34 .32 .34 .33 .37 .48 .69 .60 .33 .11 .034 .087 MAX .42 .40 .37 .35 .43 .69 .82 .76 .47 .21 .10 .19 M1N .29 .27 .31 .12 .32 .38 .57 .43 .20 .03 0 .03 AC-FT 21 19 21 29 21 29 41 37 21 6.7 3.3 1.2

CAL YR 1967 TOTAL 996. S3 MEAN 2.73 MAX 80 M1N .27 AC-FT 1,980 MTR YR 1968 TOTAL 123.80 MEAN .34 MAX .8 M1N 0 AC-PT 246 SANTA MARIA RIVER BASIN

1HJ9500 TBPUSQUiT CR1IK NiAR SISQUQC, CALIF, --CONTINU1C DISCHARGE. IN CU3IC FEET PER SECOND, MATER YEAR OCTOBER 1968 TC1 SEPTEMBER 1969 OCT NOV DEC JAN FEB MAR APR MAY JUN JUL 1 .01 .12 .16 as 3.2 77 6.2 5 3.4 l.R 1.3 1.1 2 .39 .11 .11 .14 2.4 J4 7.S 3.2 1.9 1.3 1.0 3 .59 .14 .19 .14 2.2 45 1? 2 1 1.7 1.3 1.0 4 .09 .U .17 .13 2.1 26 7.7 2. 1.7 1.3 l.C 5 .C9 .11 .17 .13 16 22 22 2. 1.8 1.4 .90 6 .09 .10 .18 .12 126 19 19 2. 1.7 1.4 .90 7 .09 .10 .18 .12 90 17 1* 2. 1.6 1.3 .90 e .09 .08 .20 .13 45 ie 11 2. l.S l.S .80 9 .09 .06 .18 .13 3^ 18 .6 2. 1.4 l.S .Kb 10 .09 ,C5 .20 .13 22 21 .8 2. 1.3 1.6 .80 11 .09 .05 .21 .13 1R 21 .2 2 . 1.3 1.6 .70 12 .09 .06 .20 .11 18 24 .8 2. 1.3 1.6 .70 11 .10 .C6 .21 .16 IS 21 .C 2. 1.3 1.7 .70 14 .16 .07 .22 .19 14 13 .4 2. 1.3 1.1 .70 1* .07 .21 .22 .14 IS 12 .3 2. 1.3 1.7 ,68 U .06 .12 .23 .10 12 .7 .6 1. 1.2 1.6 .68 17 .05 .to .19 ,l»i 11 .3 .1 1. 1.2 1.7 .67 lb .06 .10 .20 .23 17 .9 .9 1.2 1.7 .69 19 .OS .09 .20 .93 27 .1 .7 i! 1.2 1.6 .68 23 .OS .07 .21 1.5 35 .8 .7 i . 1.1 1.7 .66 21 .OS .07 .21 45 29 .0 .1 i, 1.1 1.7 .72 it .06 .OR .21 S7 39 .3 .2 i. 1.2 1.7 .69 23 .04 .ca .18 2.8 1C1 .9 .5 i. 1.2 1.7 .73 24 .03 .139 .18 90 329 .5 .0 i. 1.3 1.6 .66 25 .03 .U .22 SOI 388 .1 .8 i. 1.3 l.S .54 26 .06 .U .22 33fi 172 .6 .7 i. 1.3 l.S .79 27 .OS .11 .19 121 77 .5 i. 1.3 l.S .81 26 .06 .13 .19 80 79 \i .4 i. 1.3 l.S .73 24 .10 .IS .18 56 f 7 .5 I r * 0 t * tv 30 .13 .16 .17 12 ...... 6 .5 1.8 1.3 1.1 .81 31 .12 - .16 s.s 1.3 1.0 TOTAL 2.43 1.03 6.01 I, 303.17 1,734.9 502.1 223.7 11 64.0 42.7 46.7 23.24 MEAN .077 .IP .19 »2.1 62.0 16.2 7.46 3 2.13 1.38 1.S1 .77 MAX .16 .21 .23 SCI ?88 77 22 3.4 1.9 1.8 1.1 KIN .03 .05 .16 .10 2.1 4.5 3.4 1.4 1.1 1.0 .S* AC-FT 4.8 6.0 12 2,590 1,44u 996 444 223 127 85 93 46 CAL YR 1968 TOTAL 104.80 MEAN .29 MAX .8 MIN 0 AC-FT 208 MTR YR 1969 70TAL 4,066.25 MEAN 11. 1 MAX SOI MIN .03 AC-FT 8,070

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 NUV DEC JAN FgB MAR APR MAY JUN JUL

1 .79 .52 .63 .68 1. 37 1. 1.1 .75 .53 .34 .29 2 .80 .54 .63 b8 1. IS 1. 1.0 .75 .53 .34 .30 .83 .56 .64 n i. 3.2 I. .96 .74 .48 .34 .30 .76 .S6 .65 U 1. 12 1. .98 .75 .49 .32 .30 .70 .58 .68 .72 1. 22 1. .97 .75 .50 .31 .28

.72 .58 .68 .72 1. 4. 1. 1.0 .74 .51 .31 .22 .71 .87 .69 r? i. ;, 1. 1.1 .74 .49 .29 .22 .73 .58 .70 rs i. 2. I. l.l .70 .49 .28 .26 .72 .SB .72 . 14 1. 2. 1. l.l .72 .4* .30 .25 1- .74 .S7 .71 .85 1. 2. I. .99 .69 .49 .31 .18

U .72 .60 .70 .86 I. 2. 1. 1.0 .70 .50 .30 .20 12 .65 .60 .70 )6 1. 2. 1. .99 .71 .48 .29 .25 13 .70 .64 .67 94 1. 2. 1. .95 .69 .48 .30 .23 14 .66 .6S .68 14 1. 2. 1. .92 .71 .48 .30 .21 IS .68 .64 .67 1.9 1. 2. 1. .96 .67 .46 .30 .18

16 .73 .63 .68 IS 1. 2. I. .94 .67 .46 .29 .18 17 .66 .60 .70 2. 1. 2. 1. .98 .67 .44 .27 .16 IB .64 .60 .68 1. 1. 2. 1. .95 .65 .4* .28 .17 19 .65 .60 .68 1. l s 2. 1. .95 .64 .43 .29 .18 20 .65 .6C .68 1. 1. 2. 1. .95 .64 .44 .31 .18

21 .S9 .59 .70 I. j t 2. I. .96 .63 .40 .33 .19 22 .63 .58 .68 1. \ t 2. 1. .98 .60 .40 .30 .18 23 .61 .SB .70 1. 1. 2. 1. .93 .69 .40 .30 .15 24 .60 .SB .70 I. 1. 2. 1. .91 .59 .19 .30 .18 25 .60 .58 .73 1. I 9 g t I. .85 .61 .37 .31 .16

26 .59 .58 .70 1. 1. 2. 1. .87 .60 .35 .31 .14 27 .58 .57 .70 1. J t 2. 1. .90 .59 .35 .30 .12 28 .57 .S7 .68 1. I. 2. 1. .86 .54 .35 .32 .11 29 .SI .57 .68 1. » < » j 1. .80 .55 .35 .31 .11 30 .52 .SB .69 1. 2.0 1, .79 .54 .37 .32 .11 31 .S2 - .34 .29 T07AL 20.56 17.58 21.21 47.48 37.6 1S7.4 42.8 29. S3 19.93 13.66 9.46 5.99 MEAN .66 .99 .68 1. 1 1.34 S.08 1.43 .95 .66 .44 .31 .20 MAX .83 .65 .73 S 1.7 37 1.8 l.l .75 .S3 .34 .30 MIN .SI .52 ,63 8 1.2 2.0 1.0 .79 .54 .34 .27 .11 AC-FT 41 35 42 94 75 312 85 59 40 27 19 12 CAL YR 1969 TOTAL 4,114 .16 MEAN 11.3 MAX 501 MIN .10 AC-F7 9,160 HTR YR 1970 TOTAL 423 .20 MEAN 1.16 MAX 37 MIN .11 AC-FT 839 SANTA MARIA RIVER BASIN

11140000 SISQUOC RIVER NEAR GAREY, CALIF.

DRAINAGE AREA.--471 sq mi (revised). PERIOD OF RECORD.--October 1940 to September 1970. Records for water year 1941 incomplete, yearly estimate and monthly discharge only for October 1940 and January 1941, published in WSP 1315-B. GAGE.--Water-stage recorder. Datum of gage is 354.8 ft above mean sea level (Santa Barbara County bench mark). See WSP 1928 for history of changes prior to Oct. 1, 1959. Oct. 1, 1959, to Dec. 30, 1965, at datum 6.00 ft higher. Since Oct. 1, 1959, supplementary gage near left bank at present datum. AVERAGE DISCHARGE.--30 years, 43.6 cfs (31,590 acre-ft per year); median of yearly mean discharges, 7.1 cfs (5,100 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet). Annual maximum discharge (*) and peak discharges above base .(100 cfs), water years 1966-70 Dat< Time Dis ch. G.H. Date Time Disch. G.H. Date Time Disch. G,.H. Nov . 24, 1965 1000 1, 200 a5. 70 Apr. 7, 1967 0900 737 5.86 Jan. 25, 1969 1030 *24,500 13,.00 Dec,. 29, 1965 1800 *1, 370 a6.10 Apr. 11, 1967 0430 1,860 6.80 Feb. 6, 1969 0700 4,560 8,.90 Feb,. 6, 1966 0600 180 Apr. 22, 1967 0430 2,160 6.95 Feb. 12, 1969 1900 1,400 7,.10 Mar . 1, 1966 b9.45 Sept. 29, 1967 0530 226 7.08 Feb. 24, 1969 2200 20,600 12,.14 Feb. 28, 1969 2100 4,800 9,.80 Dec,. 3, 1966 1, 000 Nov. 21, 1967 2100 786 6.95 Apr. 6, 1969 0100 1,420 8,.85 Dec,. 6, 1966 2000 "22, 600 13.5 Nov. 30, 1967 2100 430 6.70 May 11, 1969 0200 205 9..27 Jan,. 24, 1967 3, 000 Mar. 8, 1968 0700 *2,280 7.47 Mar,. 13, 1967 0100 800 5.70 Apr. 2, 1968 1700 1,100 6.95 Mar. 1, 1970 0600 1,000 b8..95 Mar.. 31, 1967 0730 530 5.78 Mar. 5, 1970 0730 444 5..98 Apr,. 4, 1967 2100 1, 300 6.30 Jan. 21, 1969 0800 12,600 10.15 a Datum then in use. b Backwater f rom debris No flow for long periods in each year. Period of record: Maximum discharge, 24,500 cfs Jan. 25, 1969; maximum gage height, 13.5 ft De

REMARKS.--Reco No regulation abo station. Pumping from wells along stream fo 7,000 acres REVISIONS (WATER YEARS).--WSP 1011: 1941, 1943. DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966

3.0 3.5 4.2 2.5

11 I C .C 37 .*C 12 JO .7 30 0 13 00 .C 26 0 i* on .3 17 .20 15 10 .60 IT .50

16 00 9.1 .20 17 00 7.1 0 18 1* C 6.0 C 19 CO 4.7 0 2C CO 4.4 0

21 00 4.C 0 22 00 3.7 0 23 382 0 3.6 0 24 643 0 3.5 .1C 25 116 0 3.3 .40

26 If 0 3.2 0 21 .20 0 3.1 0 28 00 3.0 0 29 C 625 0 30 0 1,040 .0 C

TOTAL 0 1,170.20 2,095 766.60 927.7 15.20 0 MEAN 0 39. C 67.6 24.7 33.1 .49 0

MIN 0000 3.0 0 0 AC-FT 0 2,320 4,160 1,520 1,840 30 0

HTR YR 1966 TOTAL 4,974.70 MEAN 13.6 MAX 1,040 MIN 0 AC-FT 9,870 SANTA MARIA RIVER BASIN

11140000 SISQUOC RIVER NEAR GAREY, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, HATE* YEAR OCTOBER 1966 TO SEPTEMBER 1967 BAY OCT NOV TEC JUN JUL AUG SEP j.o 1 7.6 150 3.7 63 339 56 0 0 1.2 2 8.6 2.0 130 1.6 62 325 52 0 C 0 1 475 1.0 110 1.9 63 318 46 3 0 J 4 c 89 .90 ioc 1.3 232 311 41 3 0 0 5 < ' 4CO .80 BT 2.2 216 297 3B 0 0 .40 6 9,900 .70 70 1.0 152 2B5 34 .10 0 .50 7 ? 3,400 .63 60 1.2 49B 290 31 .10 0 .50 p c 500 .53 50 .40 386 285 3t 0 0 1.4 9 c 20C .40 45 .20 279 279 27 0 0 C 1' ? 150 .30 39 .20 268 297 25 0 0 3 11 ICC .20 35 4.5 85C 311 23 0 0 1.6 12 0 8C .1C 30 131 564 264 21 .23 0 1.5 13 Q 63 0 25 527 510 210 18 3 0 2.1 14 50 £1 21 454 490 202 15- 0 o 1.4 1* i 42 '- 15 308 480 192 12 0 0 .20 16 ; 35 0 13 279 460 183 10 0 0 0 17 c 30 c 11 296 415 170 11 a 0 0 IB C. 25 0 .1 216 847 162 11 0 0 2.0 19 £ 21 0 , f 18C ,343 153 8.6 3 c 0 2C ; 18 o .5 15C ,140 134 4.8 0 0 2.4 21 1.7 16 0 .6 125 ,240 120 1.4 0 0 2.7 2.2 8.6 14 15? .9 107 ,420 104 0 0 0 .10 23 7.6 12 100 .6 89 ,150 96 0 0 0 0 24 5.2 11 7 0 .0 75 ,2U- 93 0 0 0 i) 25 5.? 10 5 0 .2 63 ,331 88 P 0 5.2 2.1 ?6 6.U 9.C 3 3 .2 59 806 82 0 0 13 2.4 27 5.6 8.C 2 0 .0 56 763 74 .20 0 9.6 4.4 28 6.0 7.0 2 C .8 52 632 65 .10 0 8.1 4.1 29 8.1 1 0 47 512 61 0 0 5.6 55 30 9.1 5.0 1 0 49 58 .10 0 2.C 34 31 4.0 200 145 58 0 C TOTAL 120.00 MEAN 3 2.10 4.00 MAX C 9.1 9,90? 750 150 527 1,420 MIN C J 1.8 .20 ' 62 58 0 0 0 0 AC-fT 0 125 31,13d 11,710 1,020 .8 B6 238

DISCHARGF, IN CUBIC FEET PER SECOND, MATER YEAR OCTDf ER 1967 TO SEPTEMBER 1968 DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1 33 .1C 35 0 4.C C 0 2 IB .1C .20 0 2.4 C 35

6 B .6 0 0 0 0 0 1.3 7 7 .1 .10 tj 0 0 j .40 8 6 .4 3 0 0 0 601 a 9 4 .0 .10 c .10 0 95 0 13 3 .0 0 c 0 0 44 c 11 2 .1 0 0 .20 0 38 0 12 1 .4 0 0 0 0 30 0 13 1 .1 0 0 0 .40 50 c 14 .60 .1C 0 0 .10 50 0 15 0 0 0 0 0 40 0 16 .50 0 0 0 0 3? c 17 .60 0 0 0 2 .3 20 0 IB .90 0 1. 0 14 1C 0 19 .80 0 9. 0 14 6.4 0 2C .20 29 9. 0 6 .4 3.0 0 21 0 75 3. c 2 .8 1.9 0 22 0 120 1. 0 1 .6 .40 0 23 0 2B 0 .10 0 L 0 24 0 12 0 .4C 0 0 0 25 0 6.4 0 .20 0 0 0 26 .10 5.0 0 .30 0 0 0 27 .10 4.0 0 1.3 0 0 0 28 .10 3.0 0 3.6 0 0 0 29 .10 i.: 0 4.0 0 0 0 30 .10 42 0 3.2 ___ 0 c 31 .10 0 3.2 0 TOTAL 120 .30 326.00 63. 20 16.60 48 .00 1,019.70 61.60 MEAN 3 .88 10.9 2. 04 .54 1 .66 32.9 2.05 MAX 33 120 35 4.0 14 601 35 MIN 0 0 0 0 0 0 3 122 CAL YR 1967 TOTAL- 32,670. 40 MEAN 90.1 MAX 1,420 MIN 0 AC-FT 65,200 WTR YR 1968 TOTAL 1,655.40 MEAN 4.52 MAX 601 MIN 0 AC-FT 3,260 SANTA MARIA RIV1R BASIN

11140000 SISQUOC RIV1R N1AR DARBY, CALIF.--CONTINUID DISCHARGE IN CUBIC FEET PER SECOND) NATF.R YEAR OCTOBER 1968 TO SEPTEMBER 1969 NOV DEC JAN MB MAR APR HAY JUN JUL

1 0 290 ,040 327 128 28 1.8 3 2TO ,700 316 12B IB 1.3 0 293 ,700 486 128 9.9 l.l J 240 ,780 33B 128 2B .73 ) 45'1 ,560 555 121 26 .59

d 2,740 ,300 741 114 28 .30 0 2,610 ,160 377 108 25 .20 a 1,830 ,000 2T2 10B 25 0 j 1,34; B74 261 102 25 0 l'i W 820 803 2T2 9S 25 0

11 5 744 T20 241 161 25 C 12 0 1,040 630 241 134 18 & 13 0 620 545 250 114 17 0 U 0 530 549 272 114 16 0 It (1 91* 100 2B3 1C8 16 0

16 0 6S9 498 2B3 95 16 0 17 C 416 416 272 90 14 C 18 C 818 416 2T2 72 12 0 19 391 91S 432 272 77 11 0 20 6,660 917 388 272 6B 1C C

21 5,900 723 430 2T2 59 10 0 22 1,260 1,200 430 261 59 9.4 0 23 }79 4, BBC 388 239 54 9.4 0 2* 1,151 9,040 33B 178 54 8.6 0 25 13, ICC 13,2(0 32T 160 50 11 0

26 10, 100 7,340 349 154 47 9.4 0 27 4,000 .3,180 360 147 47 7.9 0 28 2,400 3,350 360 134 44 6.1 t> 29 1,080 ...... 349 134 39 7.1 0 IS 700 338 128 33 2.8 0 51 JJO 32T 30 L

TOTAU 000 47,470 60,623 29,433 8,360 2,709 476.6 5.90 v 0 MEAN 3 C 0 1,831 2rl65 820 *79 87.4 15.9 .19 U 0 MAX 010 13,K1 13,200 3,0*0 741 101 24 l.B 0 (i KIN 0 0 1 0 240 327 128 30 2.8 0 C 0 AC-FT 000 94,16-j 120,200 90,490 16tS80 5,370 945 12 0 0

CAL YR 1968 TOTAU 1,1O.9G MEAN 3.1 MAX 601 MIN 0 AC-FT 2,270 WTR YR 1969 TOTAL 145,377.50 MEAN 39T MAX 13 ,200 MIN C AC-PT 287,800

DISCHARGE, IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1969 TO SEPTEMBER 197C

DAY QCT NOV DEC JAN FIB MAR APR MAY JUN JUL AUG SfP

1 601 2 378 3 200 4 190 5 3T4

6 280 T 170 B UO 9 10 10 50

11 42 12 33 13 20 1* IB I! 11

16 IT 1? 16 18 14 19 14 20 11

21 9.0 22 7.0 23 5.0 2* 3.0 29 1.0

26 0 2T 0 28 0 29 ...... 0 30 ...... 0 Jl ...... 0 ...... -

TOTAL 0000 0 2,611.0 0 0 0 0 0 0 MiAN 0000 0 84.2 0 0 0 0 0 0 MAX 0000 0 601 9 0 0 0 0 0 MIN 0000 0 0 0 0 0 0 0 0 AC-FT 0000 0 S,1BO 0 0 0 0 C 0

CAL YR 1969 TOTAL 145,077.50 MEAN 39T MAX 13, 200 MIN 0 AC-FT 287,600 NTR VR 19TO TOTAL 2,611.00 MEAN 7.1 MAX 601 MIN 0 AC-FT 5,160 SANTA MARIA RIVER BASIN 535

11141000 SANTA MARIA RIVER AT GUADALUPE, CALIF. LOCATION.--Lat 34°58'35", long 120°34'15", in Guadalupe Grant, Santa Barbara County, on downstream side of bridge on State Highway 1, 0.5 mile north of Guadalupe and 4.5 miles upstream from mouth. DRAINAGE AREA.--1,741 sq mi (revised). PERIOD OF RECORD.--October 1940 to September 1970. Monthly discharge only October 1940 to January 1941. pub­ lished in WSP 131S-B. GAGE.--Water-stage recorder. Datum of gage is 64.92 ft above mean sea level. Supplementary water-stage recorder near right bank at same datum. Prior to Aug. 11, 1955, at site 100 ft upstream at present datum. AVERAGE DISCHARGE.--30 years, 35.6 cfs (25,79 acre-ft per year); median of yearly mean discharges, 1.4 cfs (1,000 acre-ft per year). EXTREMES.--Maximums and minimums (discharge in cubic feet per second, gage height in feet) for the water years 1966-70 are contained in the following table:

Wtr yr Date Discharge G. H. Date Discharge 1966 Dec. 30, 1965 1, 360 5. 38 Most of time 0 1967 Dec. 6, 1966 16, 000 8. 20 0 1968 Mar. 9, 1968 300 4. 80 do! 0 1969 Feb. 25, 1969 27, 200 10. 0 do. 0 1970 Mar . 2 , 1970 48 5. 83 do. 0 Period of ; record: Max ,800 cfs Jan. 16, 1952; maximum gage height, 10.0 ft Feb. 25, 1969, no flow for li REMARKS.--Records fair. Flow of Cuyama River regulated since February 1959 by Twitchell Reservoir (capacity, 240,000 acre-ft). Several small surface diversions and extensive pumping from wells for irrigation along stream above station. AVERAGE DISCHARGE represents flow to ocean, regardless of upstream development. REVISIONS (WATER YEARS).--WSP 1565: 1952. DISCHARGE! IN CUBIC FEET PER SECOND. WATER YEARS OCTOBER 1965 TO SEPTEMBER 1968 DEC. 30, 1965. 458 JAN. 29, 1967... 10 APR. 2, 1967... 1.5 APR. 16, 1967... 97 31. 11 30...... 9.0 .20 19...... 456 DEC. 3, 1966. 129 31...... 7.5 ' 1.1 20...... 233 42 FEB. 1...... 5.0 157 21...... 144 5. 3.1 2...... 2.5 15 22. 6. .. 5,920 3...... 1.0 61 23...... 45C 4...... 50 29 24...... 30C e. 322 MAR. 12...... 12 10 25. 9. 24 13...... 286 1 29 26...... 100 JAN. 22, 1967. 60 14...... 104 1 ...... 202 27...... 5C 23. 45 15...... 4.9 IS 26...... 25 24. 16...... 4.1 30 29...... 1C 21. 50 17...... 14 15 30...... S .0 26. 20 IB...... 20 10 MAY ...... 1 .2 27. 15 31...... 23 5.0 NOV...... 3 .5 26. 12 APR. 1...... 12 17...... 1.0 MAR. 9, 1966... 49 MONTH CFS-DAYS MAXIMUM MINIMUM MEAN RUNOFF IN ACRE-FE T DECEMBER 1965. 456 0 1! .1 930 CAL YR 1965...... 469 456 0 1 .26 93C HTR YR 1966...... 469 458 0 1 .26 930 DECEMBER 1966...... 12 , 040 . 1 5,920 0 366 23,880 CAL YR 1966...... 12 , 040 . 10 5,920 0 33 .0 23,660 JANUARY 1967...... 328.5 100 0 10 .6 652 FEBRUARY ...... 9.00 5.( 0 .32 18 MARCH...... 448.20 266 0 1< .S 969 APRIL...... 3,325.80 600 .20 111 6,60C MAY...... 1.2 1.2 0 .039 2 .4 HTR YR 1967...... 16,152.60 5,920 0 44 .3 32,040 NOVEMBER 1967...... 3.5 3.5 0 .12 6 .9 CAL YR 1967...... 4,116.20 600 0 11 .3 6,160 MARCH 1968...... 49 49 0 1 .88 97 HTR YR 1968...... 52.90 49 0 .14 104 NOTE. FLOW OCCURRED ONLY ON DAYS LISTED ABOVE. SANTA MARIA RIVER BASIN

11141000 SANTA MARIA RIVER AT GUADALUPE, CALIF.--CONTINUED DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969 JUN JUL J 6? <, 920 0 T 4? 5 280 3. 1 ^ 20 * 140 217 J 5.C 4 260 113 0 (1 3 750 118 0 «2 2 241 . «27 1 1,730 1 300 285 0 398 1 690 162 o 300 1 410 118 C 167 1 190 118 C m 1,0*0 11 0 82 548 5. 2 3 27 446 I. 8 0 5.2 614 1. 4 : 3.0 350 0 0 48 2CC 0 C .60 12C 0 ^ 1.9 60 0 16 5.2 30 C 389 24 7.220 34 725 49 57 165 25 3,670 8.54C 11,700 7,940 4,60i 2,332 3,491 674 4,230 299 ______179

TOTAL 0 MEAN : c o 757 1,139 1,085 52.7 0 MAX C ? 9 6,540 11,700 5,280 427 0 NIN 0 0 ) 3 0 0 0 0

97

DISCHARGE, IN CUBIC CFET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970 OCT NCJV DEC JAN FEB MAR APR MAY JUN JUL

31 __-._

TOTAL 000 MEAN OOf MAX 0 C 0 MIN 000 AC-FT 0 0 )

CAL YR 1969 TOTAL 90,560.90 MEAN 248 MAX 11,700 DISCHARGE AT PARTIAL-RECORD STATIONS 537

As the number of streams on which streamflow information is likely to be desired far exceeds the number of stream-gaging stations feasible to operate at one time, the Geological Survey collects limited streamflow data over a period of years for use in hydrologic analyses, the site at which the data are collected is called a partial-record station. Data collected at these partial -record stations are usable in low-flow or flood-flow analyses, depending on the type of data collected. Records collected at partial-record stations are ordinarily presented in two tables. The first is a table of discharge measurements at low-flow partial-record stations, and the second is a table of annual maximum stage and discharge at crest-stage stations; however, no records at jow-flow partial-record stations are available for the water years 1966-70.

CREST-STAGE PARTIAL-RECORD STATIONS

Annual maximum discharge at crest-stage partial-record stations during water years 1966-70 Station Station name Location Drainage Period Annual maximum number area of Date Gage Discharge (sq mi) record height (cfs) Cfeet) TIA JUANA RIVER BASIN CEDAR CREEK NEAR Lat -32°39'05", long 116°51'10", 6.66 1962-70 11-22-65 50 JAMUL, CALIF. in NWfc sec. 35, T.17 S. , 12- 6-66 660 R.I E. , San Diego County, at 1968 (a) dip in highway on Otay Road, 2-25-69 160 4.7 miles south of Jamul . 1970 Ca) SAN DIEGO RIVER BASIN WILDCAT CREEK NEAR Lat 32°53'56", long 116°53'16", .82 1962-70 11-22-65 LAKESIDE, CALIF. in NW* sec. 4, T.15 S. , 12- 6-66 R.I E., San Diego County, at 3- 8-68 4.5 culvert on Wildcat Canyon 1-25-69 20 road, 3.1 miles northeast of 3- 1-70 Lakeside. LOS PENASQUITOS CREEK BASIN RATTLESNAKE CREEK Lat 32°58'36", long 117°01'20", b3.74 1962-70 11-22-65 4.45 NEAR POWAY, in N>i sec. 7, T.14 S., R.I W. , 12- 6-66 4.99 CALIF. San Diego County, at culvert 11-21-67 4.54 on county road, 1.4 miles 2-25-69 4.24 northeast of Poway. 3- 1-70 3.36 SAN DIEGUITO RIVER BASIN CLEVENGER CREEK Lat 33°04'11", long 116°53'33", .45 1962-70 11-23-65 7.10 TRIBUTARY NEAR in Valle De Pamo Grant, San 12- 6-66 5.01 RAMONA, CALIF. Diego County, at culvert on 12-18-67 State Highway 78, 2.7 miles 1-25-69 north of Ramona. 3- 1-70 LAKE HODGES TRIB­ Lat 33°05'19", long 117°06'48", .18 1962-70 11-23-65 UTARY NEAR in NWfc sec. 32, T.12 S. , 12- 6-66 7.12 ESCONDIDO, CALIF. R.2 W. , San Diego County, at 12-18-67 7.14 culvert on Del Dias Highway, 1-25-69 6.86 2.7 miles southwest of 3- 2-70 6.90 Escondido. SAN LUIS REY RIVER BASIN AGUA CALIENTE CREEK Lat 33°16'05", long 116°39'17", .050 1962-70 11-22-65 5.66 TRIBUTARY NEAR in San Jose Del Valle Grant, 8-30-67 6.95 WARNER SPRINGS, San Diego County, at culvert 3- 8-68 5.3 CALIF. on State Highway 79, 1.6 10- 3-68 miles southwest of Warner 3- 1-70 Springs. WIGHAM CREEK NEAR Lat 33°15'30", long 116°47 ' 55", 1.40 1965-70 4- 9-65 4.33 dlO LAXE HENSHAW, in SEtiSWfc sec. 32, T.10 S. , 11-22-65 5.13 30 CALIF. R.2 E., San Diego County, at 12- 6-66 7.84 161 culvert on State Highway 76, 12-18-67 3.80 0.6 mile north of San Luis 2-25-69 7.50 Rey Camp and 2.5 miles 4-27-70 4.82 northwest of dam at Lake Henshaw. SAN LUIS REY RIVER Lat 33°21'36", long 117°12'10", .36 1962-70 11-22-65 3.63 TRIBUTARY NO. 2 in SEt< sec. 28, T.9 S. , 12- 6-66 3.84 NEAR FALLBROOK, R.3 W. , San Diego County, at 3- 8-68 2.20 CALIF. culvert on Live Oak Park 2-25-69 4.41 Road, 3.2 miles southeast of 3- 1-70 3.21 Fallbrook. SANTA MARGARITA RIVER BASIN COAHUILA CREEK Lat 33°33'20", long 116 <1 41'15", 4.90 1961-70 11-22-65 TRIBUTARY AT on section line between 12- 6-66 ANZA, CALIF. sees. 17 and 20, T.7 S. , 12-18-67 R.3 E. , Riverside County, San 1-25-69 Bernardino National Forest, 8-16-70 on Coahuila Road, 0.8 mile west of Anza. SANTA MARGARITA Lat 33°24'39", long 117

Annual maximum discharge at crest-stage partial-record stations during water years 1966-70--Continued Station Station name Location Drainage Period Annual maximum number area of Date Gage Discharge (sq mi) record height (cfs) (feet) SAN MATEO CREEK BASIN SAN MATED CREEK Lat 33°25'23", long 117°32'43", .65 1962- 70 11-23-65 6 .65 62 TRIBUTARY NEAR in NWsSEii sec. 6, T.9 S. , 12- 6-66 5 .37 45 SAN ONOFRE, R.6 W. , San Diego County, at 11-21-67 2 .27 4. 1 CALIF. culvert on military road in 1-25-69 8 .42 268 Camp Joseph Pendleton, 3.3 11- 7-69 2 .18 3. 2 miles northeast of San Onofre. SAN JUAN CREEK BASIN SAN JUAN CREEK Lat 33°36'10", long 117°27'08", .39 1962- 70 11-22-65 10 .21 16 TRIBUTARY NEAR in NEVE'S sec. 36, T.6 S., 12- 6-66 10 .30 18 ELSINORE, CALIF. R.6 W., Riverside County, 11-20-67 9 .81 7. 2 Cleveland National Forest, 2-25-69 2,130 at culvert on State High­ 197" - way 74, 9.5 miles southwest of Elsinore. SAN JUAN CREEK Lat 33°33'05", long 117"32'53" > b.15 1962- 70 11-22-65 13 .44 24 TRIBUTARY NEAR in SENSE'S sec. 18, T.7 S. , 1-24-67 11 .54 12 SAN JUAN CAPI-S- R.6 W., Orange County, at 3- 8-68 11 .09 5. 5 TRANO, CALIF. culvert on State Highway 74, 1-25-69 14 .45 29 1970 (a) Juan Capistrano. LIVE OAK CREEK NEAR Lat 33°39'S4", long 117 8 35'59", 1.31 1962- 70 11-22-65 4 .96 123 MODJESKA, CALIF. in Vft sec. 10, T.6 S., R.7 W. , 12- 6-66 4 .43 96 Orange County, at culvert on 11-21-67 3 .15 39 county road, 3.3 miles south­ 2-25-69 11 .74 590 east of- Modjeska. 1970 " SANTA ANA RIVER BASIN FORSEE CREEK NEAR Lat 34'09'25", long 116°55'50", - 2.82 1961- 70 11-22-65 20 .81 340 CAMP ANGELUS, in SEWE'j sec. 24, T.I N. , 12- 6-66 22 .15 390 CALIF. R.I W. , Mohave County, San 7-24-68 18 .49 170 Bernardino National Forest, 1-25-69 20 .47 320 at culvert on Santa Ana River 11- 7-69 17 .12 6 road, 2.9 miles east of camp Angelus. CARIBOU CREEK AT Lat 34°16'10", long 116°SO'4S ri , 7.02 1961- 70 11-22-65 5 .09 140 BIG BEAR CITY, in Snk sec. 11, T.2 N. , R.I E., 12- 6-66 S .31 195 CALIF. Mohave County, San Bernardino 7-24-68 2 .30 4. 8 1-25-6S. 6 .03 350 on State Highway 30, 0.5 mile ,1- 8-70 c.,5 north of Big Bear City. MILL CREEK TRIBU­ Lat 34°04'16", long 117 6 02'1S", b2.01 1962- 70 12-29-65 10 .41 20 TARY NEAR in NEi< sec. 24, T.I S. , R. 2 W. , 12- 6-66 11 .61 98 YUCAIPA, CALIF. Mohave County, at culvert on 11-21-67 10 .77 37 Bryant Street, 2.6 miles north 2-25-69 13 .28 199 of Yucaipa. 11- 7-69 10 .52 25 LITTLE MILL CREEK Lat 34°10'5S", long 117'08'56", 1.73 1961- 70 11-22-65 44 .66 459 NEAR RUNNING in NEljSVft sec. 12, T.I N., 12- 6-66 42 .93 310 SPRINGS, CALIF. R.3 W-. , Mohave County, San 3- 8-68 39 .82 64 Bernardino National Forest, 1-25-69 46 .26 620 at culvert on State High­ 3- 1-70 39 .29 40 way 30, 3.0 miles southwest of Running Springs. LYTLE CREEK TRIBU­ Lat 34°14 I 02", long 117°28'29", .53 1961- 69 12-29-65 c200 TARY NEAR LYTLE in NE% sec. 26, T.2 N. , R.6 W. , 12- 6-66 5 .29 35 CREEK, CALIF. Mohave County, San Bernardino 11-19-67 2 .74 b3 (station discon­ 2-25-69 260 tinued) . Lytle Creek road, 2.4 miles southeast of Lytle Creek. LABORDE CREEK NEAR Lat 33°51'44", long 117 8 01'29", 7.57 1962- 70 11-22-65 7 .92 190 SAN JACINTO, in Sift sec. 31, T.3 S., 12- 4-66 3 .67 46 CALIF. R.I W., Riverside County, at 3- 8-68 8 .22 ' 500 culvert on State Highway 79, 2-25-69 9 .38 1,690 5.6 miles northeast of '.ake- 11- 7-69 4 .73 84 view. ST. JOHNS CREEK Lat 33 8 37'23", long 116°56 ( 07", ,J7 1962- 63, 11-22-65 4 .20 12 . NEAR SAGE, CALIF. in N>s sec. 25, T.6 S., R.I W. , 1965- 70 12- 6-66 3 .51 3,,3 Riverside County, at culvert 11-21-67 3 .13 10',2 on State Highway 79, 2.8 2-25-69 4 .08 miles north of Sage. 3- 1-70 3 .71 5 TEMESCAL CREEK Lat 33'43'30", long 117«22'09", .36 1962- 70 11-22-65 3 .58 23 TRIBUTARY NEAR in NEk sec. 23, T.5 S., 1967 c*o ELSINORE > CALIF. R. 5 W. , Riverside County, at 11-21-67 33',2 culvert on State Highway 71, 1-25-69 4 .11 4.7 miles northwest of 1970 £0.) Elsinore. ICEHOUSE CANYON Lat 34 J 14'48", long 117'38'29", b4.45 1961- 70 11-22-65 1,300 CREEK NEAR MOUNT in NWM sec. 20, T.2 N., 12- 6-66 - 1,100 BALDY, CALIF. R.7 W. , Mohave County, Angeles 7-28-68 14 .93 172 National Forest, at culvert on 1-25-69 7,600 Mount Baldy road, 1.1 miles 1970 northeast of Mount Baldy. BLACK STAR CREEK Lat 33'46'58", long 117'SO'5«", b4.65 1962- 70 11-22-65 ,22 .9 388 NEAR SILVERADO, in NE'< sec. 36, T.4 S., 12- 6-66 24 .0 697 CALIF. R.8 W. , Orange County, 3- 8-68 22 .95 400 Cleveland National Forest, at 2-25-69 22 .8 2,340 slope-area site along Black 1970 Star Canyon Road, 3.3 miles northwest of Silverado. NOTE.--See footnotes at end of table. CRBST-STAGB PARTIAL-RECORD STATIONS

Annual maximum discharge at crest-stage partial-record stations during water years 1966-70--Continued Location Drainage Period Annual maximum number area of Date Gage Discharge (sq mi) record height (efs) (feet) SAN GAIRIEL RIVBR BASIN 11081200 NORTH FORK SAN Lat 34'17'26", long 117'50'22", 6,79 1961-70 12-29-65 17, 35 2,080 GABRIEL RIVER Las Angelas County, Angelas 12- 6-66 6, 63 250 AT COLDBROOK 11-21-67 6. 60 240 GUARD STATION, en State Highway 39 it Cold- 1-25-69 13. 04 1,740 CALIF. brook guard station, 3- 1-70 6. 57 230 LOS ANGELES RIVER BASIN 11091950 LIMEKILN CANYON Lat 34°16'26", long 118 C 33'28", 3,41 1960-70 11-22-65 8. 20 380 WASH NEAR CHATS- in SWWBi* sac, 9, T.2 N., 12- 6-66 S. 85 220 WORTH, CALIF, R.16 W. , Los Angeles County, 11-21-67 6. 45 260 1-25-69 9. 25 470 3 miles northeast of Chats- 3- 1-70 3. 77 100 worth, 11096000 HAINES CREEK NEAR L»t 34°15'50", long 118 e 16'15", 1.26 1917-34, 4- 9-65 1, 70 d4 ,3 TUJUNGA, CALIF. in NWWft sec, 17, T.2 N,, 1835-61*, 1966 C») (station dis- K.13 W., Los Angeles County, 1965-67 1-24-67 2. 94 42 continued) , on right bank 0,5 mile up- and 1,5 milas northeast of Tujunga, MALIBU CREEK BASIN 11105200 COLD CREEK TRIBU­ Lat 34'05'SS", long 118'40'18", .30 1961-70 12-29-65 15. 54 40 TARY NEAR MALIIU in SWWWij sac. 9, T.I S., 1-24-67 IS. 43 36 BEACH, CALIF. R.17 W. , Los Angeles County, 11-21-67 17, 25 92 at culvert on Mulholland 2-25-69 16. 72 74 Highway, 4,6 miles north of 3- 1-70 14. 25 11 Malibu Beach. LITTLE SYCAMORE CANYON CREEK BASIN 11105700 LITTLE SYCAMORE Lat 34*05'30", long 118'56'55", 1.35 1961-70 12-29-65 10. S3 377 CREEK NEAR NEW- in SSkSn sec. 11, T.I S,, 1-24-67 7, 39 215 BURY PARK, CALIF. R.2Q W,, Vantura County, at 11-21-67 7. 34 212 1-25-69 7. 89 240 6.7 miles south of Newbury 3- 1-70 4. 13 55 Park. CALLBGUAS CREEK BASIN 11107000 HONDA BARRANCA Lat 34'16'08", long 119'02'56", 2.57 1955-631, 11-24-65 6. 37 320 NEAR SOMIS, in Las Posas Grant, Ventura 1964-70 1-24-67 7. 76 420 CALIF. County, at culvert on Price 3- 8-68 e!4. 78 14S road, 3.1 miles wast of Somis. 1-21-69 15. 34 184 3- 1-70 14. 39 106 SANTA CLARA RIVER BASIN 11107700 SOLEDAD CANYON Lat 34'29'20", long 118'06'55", 4.08 1960-70 12-29-65 3. 55 7 .5 TRIBUTARY NEAR in Ell sec. 27, T.5 N., 9- 4-67 3. 15 3 .2 ACTON, CALIF. R.12 W, , Los Angeles County, 3- 8-68 3. IS 3 ,2 Angeles National Forest, at 2-24-69 3. 30 S .0 1970 (a) Highway, 4.8 miles northeast of Acton. 11108200 SANTA CLARA RIVIR Lat 34'25'28'', long 118«38'46", ,65 1960-70 12-29-65 11. 6 190 TRIBUTARY NEAR 12- 6-66 7, 35 10 VAL VERDE, CALIF. Angeles County, at culvert on 11-21-67 7, 67 18 State Highway 126, 2,8 miles 1-25-69 8. 88 57 southeast of Vsl Verde. 3- 1-70 6. 93 2 .4 RINCON CREEK BASIN (formerly published as V'entura River basin) 11118700 CASITAS CRSEK TRIB­ Lat 34'23'36", long 119*25'24", .76 1960-70 11-24-65 23. 00 153 UTARY NEAR SBA in SBliSBi* sec. 30, T.4 N., 12- 6-66 21. 72 80 CLIFF, CALIF. R.24 W, , Ventura County, las 3- 8-6S 19. 80 9 1-25-69 23. 62 195 2-28-70 19. 80 9 3.4 milas north of Sea Cliff. SANTA YNEZ RIVIR SASIN 11123480 LOS LAURELES CANYON Lat 34*30'55", long HSMS'SO", .28 1960-70 11-22-65 9. 61 130 TRIBUTARY NEAR 1-24-67 12. 48 163 GOLITA, CALIF. 4- 2-68 4. 37 16 culvert on State Highway 150, 1-25-69 10. 00 135 4,5 miles north of Goleta, 3- 1-70 4. 94 29 11125000 CACHUMA CREEK NEAR Lat 34'36'30", long 119°56'04", 23.8 1950-621, 4- 9-65 5. 31 d508 SANTA YNBZ. CALIF, in Tequepis Grant, Santa 1965-67 12-29-65 6, 00 1,180 (station discon­ Barbara County, on right bank 12- 6-66 7. 85 3,700 tinued). Lasaro Canyon and 8.3 miles 11132300 EL JARO CREEK NEAR Lat S4'31'38", long 120'17'22", bJ.54 1960-70 12-29-65 7. 04 150 LAS CRUCES, CALIF, Santa Barbara County, at 1-24-67 14. 20 499 culvert on Rgneho Los Llanito 3- 8-68 4. 60 64 road, 3.9 miles northwest of 1-25-69 13. 68 370 Las cruces, 2-28-70 2. 88 42 11136450 DRY CANYON TRIBU­ Lat 34«43'35", long 119 f 13'4S", .15 1960-70 12-29-65 , 4. 88 14 TARY NEAR Ventura County, Lo* Padres 1-24-67 3. 86 2 STAUFFBR, CALIF. National Forest, at culvert 11-21-67 4. 40 7 .S on county road, 9,5 miles 2-24-69 5. 14 19 southwest of Stauffer, 3- 1-70 4. 03 3 .4 NOTE,--See footnotes at end of table, CREST-STAGE PARTIAL-RECORD STATIONS

Annual maximum discharge at crest-stage partial-record stations during water years 1966-70--Continued Station name Location Drainage Period Annual maximum scharj (sq mi) record height (cfs) (feet) SANTA MARIA RIVER BASIN FOXEN CREEK NEAR LOS Lat 34°47'40", long IZO'll'OS", b6.64 1960-70 1-30-66 1.06 ALAMOS, CALIF. Santa Barbara County, at cul­ 4-11-67 1.18 vert on county road, 7 miles 1968 Ca) northeast of Los Alamos. 2-24-69 72 1970 (a) TEPUSQUET CREEK Lat 34°54'10", long 120°13'35", b2.44 1960-70 11-22-65 1.91 TRIBUTARY NEAR Santa Barbara County, at cul­ 12- 6-66 2.76 SISQUOC, CALIF. vert on county road, 4.2 miles 1968 2-24-69 3- 1-70 t Operated as a continuous-record gaging station. a No flow during water year. b Revised. c Estimated. d Not previously published. e New local datum. SEEPAGE INVESTIGATIONS 541 A seepage or low-flow investigation along a watercourse involves discharge measurements or observations of no tary relative to observations, water samples and temperatures, and other relevant data. Measuring sites are described to the extent that they may be used in subsequent investigations. Sometimes temporary recording installations are used to supplement records at regular gaging stations in the study of flow trends. Field work proceeds from the most upstream measuring site. Hydrographers may alternate measurements, or the main reach may be subdivided and one hydrographer assigned to each subreach, with overlap measurements made at hydrographer working the upper reach). Quality of water data are published in Part 2 of the State report and in separate water-quality volumes of the water-supply paper series. In the tabulated results the indicated gains or losses may sometimes appear incompatible because of diurnal or change.

SANTA ANA RIVER BASIN

SANTA ANA RIVER SEEPAGE INVESTIGATION

study of June 5, 1969, was 11.6 miles in length.

No pr

disch. In NWsNE'iSWis sec. 4, T.I S., R.2 W. , 307 on left bank near mouth of canyon, 1.8 miles upstream from Mill Creek Cstation 11051500) . SANTA ANA In SWuNWWii sec. 8, T.I S., R.2 W. , RIVER San Bernardino County, on diver­ SPREADING sion channel 0.8 mile downstream DIVERSION. from Southern California Edison Co.'s powerhouse No. 3 and 2.4 mile northeast of Mentone [station 11051600) . SANTA ANA In NEStSEijNEit sec. 8, T.I S., R.2 W. , 356 207 RIVER. 17.7 MILL CREEK. In NEHSE^NWi; sec.17, T.I S. R.2 W. , 210 349 near Mentone. 14.2 SANTA ANA In Ntft,SW(NE!<; se .10, T.I S., R.3 W., 402 -154 RIVER. at Orange Str et. 12.7 SANTA ANA In SE!tNE)(SE!s se .8, T.I S., R.3 W., 151 289 -113 RIVER. at Alabama St eet. 12.4 CITY CREEK. .8, T.I S., R.3 W., 256 at Alaba 11.7 SANTA ANA In Redlands Grant, T.I S., R.3 W. , RIVER. at Califo.rnia Street. 10.5 MISSION In SW^NE^ sec.24, T.I S., R.4 W. , at CHANNEL. Tippeconoe. SANTA ANA In San Bernardino Grant, San Bernar­ RIVER. dino County, on downstream end of bound traffic bridge on Waterman Avenue, 0.1 mile upstream from San Timoteo Creek and 2.7 miles south­ east of San Bernardino (station 11056200) . In San Bernardino Grant, San Bernar­ dino County, on right bank 100 ft downstream from bridge on Waterman Avenue, 0.2 mile upstream from mouth, and 1.5 miles northwest of Loma Linda (station 11057500). In San Bernardino Grant, San Bernar­ dino County, on left bank 250 ft downstream from Hill Street and 1.5 miles upstream from mouth (station 11059000). SEWER OUTFALL. In San Bernardino Grant, T.I S. , 25.8- R.4 W., 0.4 mile northeast of "E" Street. In San Bernardino Grant, San Bernar- 356

and mile (station 11059300). 8.0 In San Bernardino Grant, T.I S., 97.9 R.4 W., at Fairway Drive. 7.7 SANTA ANA In San Bernardino Grant, T.I S., 316 RIVER. R.4 W., at Mount Vernon Avenue. 6.0 SANTA ANA In San Bernardino Grant, T.I S. , -51.2 266 -147 RIVER. R.4 W., at La Cadena Boulevard. SANTA ANA In Jurupa Grant, T.2 S., R.5 W., -30.5 167 -99 RIVER. at Mission Boulevard. SANTA ANA RIVER BASIN

SANTA ANA RIVER SEBPASE INVESTIGATION A series of discharge measurements was made Sept. 10, 1970, on the Santa Ana River, diver»lons, and tribu­ taries, MWD crossing to Prado Dam, Calif,, to study channel gains and losses. The main channel length for the study was 15.1 miles. Tributary inflow was considered a contribution and not a gain; diversions were considered a deduction and not a loss, The measurements made were of base flow with the last measurable precipitation occurring Mar. 31, 1970, The base flew has a diurnal fluctuation and these measurements were made on the low point of that diurnal, The measurements of Temeseal Creek at Prado Dam was made on Sept, 11, 1970, at 1000 hours and may net be representa­ tive of the water that was there during the low portion of the diurnal on Sept. 10, 1970, which occurred at 2200 hours. Discharge in this reach of the river has been measured or recorded periodically for many years. River Time Discharge, in cfs miles measured Meas, Gain or disch. loss 1S.1 SANTA ANA In NE^NBHSWic see.30, T,2 S, , R.5 W,, Riverside County, on RIVER AT left bank 300 ft upstream From MWO crossing, 0.7 mile MWD CROSS­ downstream from Union Pacific Railroad bridge, 1,2 miles ING. upstream from bridge on Van Buren Boulevard, and 3.3 miles north of Arlington (station 11066460), 14.5 RIVERSIDE In" SEHNE'sSE's sec.25, T.2 S., Riverside County, at efflu­ WATER ent end of chlorine contact chambers, 0.4 mile upstream QUALITY from Van Buren Boulevard and 3.1 miles northwest of CONTROL PLANT Arlington (station 11066480). AT RIVERSIDE NARROWS, 13.9 SANTA ANA In SW>nNB»sSW>6 see.25, T,2 S,, R.6 W. , Riverside County, on RIVER AT right bank at downstream side of Van Buren Boulevard RIVERSIDE bridge, 1.8 miles downstream from Union Pacific Rail­ NARROWS, road bridge, 3.3 miles northwest of Arlington, and 12 miles upstream from Temescal Creek (station 11066500). 13.2 HIDDEN VALL1Y In NEisSBHSWiii see.26, T.2 S. , R.6 W,, near Riverside SUN CLUB Narrows. DIVERSION. 13.1 SANTA ANA In SWWtSEls see.26, T.2 S., R.6 W, , below Gun Club 0950 33.1 RIVER. diversion. 11,3 JURUPA WAT1R In SWiuNWuNWlj sec.27, T.2 S., R.6 W, , near Mira Loma. 1240 1,7 QUALITY CON­ TROL PLANT. 9.5 SANTA ANA In NElsNWeNEic sec,32, T.2 S., R.6 W, , near Sun Club 1345 24.4 RIV1R. return. 9.4 HIDDEN VALL1Y In SE>gNES«NES« see, 32, T.2 S,, R.6 W., 2.2 miles upstream 1400 4,6 GUN CLUB from Hamner Avenue, RETURN FLOW. 7.2 SANTA ANA In NWeNWkNWis see,6, T.3 S. , R.6 W, , at Hamner Avenue, 1600 20.1 -8,9 RIVER. 4.4 SANTA ANA In SWuNEWs see,10, T.3 S. , R.7 W. , in Prado Park near 1855 13,9 -6.2 RIVER, Auburndale bridge. 3.0 CUCAMONGA Near Santa Ana River. CREEK, 2.0 CHINO CREEK, Near S«nta Ana River. .5 TEMESCAL In SEisNB>8SWie sec.20, T.3 S., R.7 W, , at Prado Dam 1000 CREEK. (Sept. 11, 19703, 0 SANTA ANA In La Sierra SraVit. Riverside County, on left bank of 2000 RIVER BELOW outlet channel, 2,500 ft downstream from axis of Prado to PRADO DAM. Dam and 4.5 miles west of Corona (station 11074000), 2400

a Overall net gain or loss, SANTA ANA RIVER BASIN

Santa Ana River, lat 33°51'30", long 117°47'12", in Canon de Santa Ana Grant, about 1,000 ft abov Yorba Bridge and 2.7 miles southeast of Atwood, water years 1961-68 (Measured previously 1938-60) Date Disch. Date Disch. Date Disch. Date Disch. Oct. 3, 1960... 259 July 28, 1961... 220 July 10, 1962... 293 Apr. 30, 1963... 185 7...... 278 31...... 0 13...... 296 May 3...... 235 10...... 226 Sept. 8...... 18.7 17...... 319 7...... 199 14...... 219 11. 99. 20...... 343 10...... 196 17...... 212 15...... 109 24...... 340 14...... 124 21...... 227 18...... 61.1 27...... 339 17...... 239 24...... 219 22...... 79.4 31...... 324 21...... 207 28...... 218 25...... 94.4 Aug. 3...... 276 24...... 228 31...... 220 29...... 90.4 7...... 280 28...... 242 Nov. 4...... 244 Oct. 2...... 90.9 10...... 337 31...... 246 7...... 214 6...... 106 14...... 299 June 4...... 52.7 10...... 219 9...... 99.9 17...... 297 7...... 180 14...... 223 13...... 97.4 21...... 318 11...... 3.57 18...... 210 20...... 194 24...... 321 14...... 1.45 21...... 197 23...... 170 28...... 280 18...... 90 25...... 219 27...... 319 31...... 293 Aug. 30...... 59.2 28...... 250 30...... 348 Sept. 7...... 267 Sept. 4...... 116 Dec. 2...... 28.1 Nov. 3...... 222 12...... 271 6...... 122 5...... 22.0 6...... 212 14...... 298 11...... 187 9...... 31.7 10...... 233 18...... 279 13...... 180 12...... 24.4 13...... 149 21...... 296 17...... 148 16...... 3.9 17...... 201 25...... 241 20...... 142 19...... 2.2 24...... 266 28...... 247 24...... 188 23...... 37.5 27...... 289 Oct. 2...... 240 27...... 128 27...... 38.1 Dec. 1...... 271 5...... 259 Oct. 1...... 127 30...... 34.7 4...... 79.7 9...... 290 4...... 180 Jan. 3, 1961... 39.6 8...... 221 12...... 276 8...... 216 6...... 81.3 15...... 222 16...... 278 11...... 207 9...... 99.1 22...... 208 19...... 316 15...... 203 13...... 201 29...... 214 23...... 326 18...... 93.2 16...... 184 Jan. S, 1962... 241 26...... 320 22...... 186 20...... 192 8...... 238 30...... 291 25...... 203 23...... 197 12...... 218 Nov. 2...... 262 Nov. 1...... 216 27...... 234 15...... 187 6...... 249 ,5...... 161 30...... 224 19...... 169 9...... 254 7...... 167 Feb. 3...... 239 22...... 175 16...... 223 12...... 209 6...... 226 26...... 269 20...... 211 15...... 218 10...... 214 29...... 172 23...... 217 19...... 194 17...... 189 Feb. 2...... 160 27...... 220 21...... 343 20...... 200 5...... 1S8 30...... 239 22...... 123 27...... 190 10...... 378 Dec. 4...... 232 29...... 228 Mar. 3...... 180 14...... 163 7...... 220 Dec. 3...... 210 6...... 184 21...... 540 11...... 269 6...... 218 10...... 213 26...... 120 14...... 275 10...... 166 13...... 216 Mar. 2...... 88.3 18...... 2.03 13...... 125 17...... 167 5...... 208 18...... 106 20...... 156 20...... 175 8...... 243 18...... 103 24...... 138 24...... 169 12...... 258 21...... 129 27...... 168 27...... 171 16...... 266 28...... 106 31...... 162 31...... 172 19...... 227 Jan. 4, 1963... 51.7 Jan. 3, 1964... 150 Apr. 3...... 181 23...... 210 8...... 41.8 7...... 177 7...... 72.3 26...... 264 11...... 43.3 10...... 172 10...... 10.4 30...... 300 15...... 38.4 14...... 143 14...... 143 Apr. 2...... 286 18...... 36.1 17...... 175 17...... 154 6...... 268 22...... 57.4 22...... 125 Jl...... 106 9...... 260 25...... 104 23...... 194 24...... 1.5 13...... 260 29...... 133 28...... 65.6 25...... 1.3 16...... 264 Feb. 1...... 139 31...... 38.3 26...... 0 20...... 306 5...... 136 Feb. 1 7...... 141 May 12...... 216 23...... 295 8...... 144 7...... 135 15...... 221 27...... 297 11...... 431 11...... 143 19...... 214 30...... 315 15...... 154 14...... 114 22...... 226 May 4...... 341 19...... 131 18...... 105 26...... 227 7...... 234 26...... 163 21...... 93.4 29...... 213 11...... 343 Mar. 1...... 198 25...... 95.4 Juno 2...... 130 14...... 352 5...... 247 28...... 90.5 5...... 212 17...... 319 8...... 233 Mar. 3...... 110 9...... 282 21...... 221 12...... 222 6...... 105 12...... 290 25...... 308 15...... 237 10...... 103 16...... 291 28...... 299 19...... 73.9 13...... 121 19...... 294 June 1,...... 261 22...... 52.4 17...... 174 23...... 2S6 4...... 264 26...... 84.8 20...... 181 26...... 254 8...... 288 29...... 194 24...... 207 30...... 241 11...... 292 Apr. 2...... 214 27...... 215 July 3...... 239 15...... 4.34 5...... 294 31...... 229 7...... 256 18...... 1.97 9...... 203 Apr. 3...... 209 10...... 251 22...... 268 12...... 227 7...... 201 14...... 251 26...... 280 16..,...... 246 10...... 192 17...... 256 29...... 273 19...... 228 Hi...... 201 21...... 220 July 3...... 280 23...... 250 17...... 204 24...... 219 6...... 281 26...... 170 21...... 201 SANTA ANA RIVER BASIN

SANTA ANA RIVER ABSORPTION STUDIES CONTINUED Date Disch. Date Disch. 24, 1964... 224 Jan. 22, 1965... 85.4 Feb. 11, 1966... 97.2 29, 1967. 26...... 127 5...... 206 29...... 118 25...... 47.7 8...... 210 Feb. 2...... 26.0 12...... 197 5...... 18.7 18.7 15...... 189 9...... 133 31.8 19...... 16...... 102 0 22...... 259 19...... 118 Apr. 1...... 18. 13.1 26...... 233 23...... 110 25. 0 29...... 246 26...... 108 Sept. 1. S9.3 Mar. 2...... 74.5 28.0 5...... 61.7 29...... 45.6 12...... 228 9...... 122 May 6 ...... 55.9 12...... 132 16.8 19...... 253 15...... 220 20...... 74.9 23...... 16...... 204 27...... 96.0 26...... 222 19...... 193 June 3...... 88.2 30...... 220 23...... 142 123 3...... 251 26...... 11.9 143 7...... 260 30...... 4.37 July 1...... 198 10...... 232 Apr. 1...... 153 199 14...... 243 2 353 Aug. 5...... 514 17...... 239 6...... 105 9...... 469 21...... 238 9...... 333 12...... 154 24...... 240 12...... 203 264 28...... 232 16...... ISO 19...... 185 31...... 216 20...... 148 22...... 187 4...... 23...... 96.7 26...... 7...... 230 27...... 86.4 Sept. 2...... 2.17 30...... 80.4 May 4 ...... 70.5 16...... 5, 1968... 85.1 7...... 68.6 Oct. 7...... 12...... 106 11...... 60.0 14...... 256 19...... 101 Sept 12.4 14...... 53.2 21...... 103 26...... 137 46.8 18...... 53.4 28...... 2...... 203 21...... 50.9 100 129 18...... 143 28...... 225 June 4...... 271 122 203 8...... 3.75 18...... 136 200 282 11...... 2.28 698 29...... 284 15...... 42 705 18...... 0 121 231 Aug. 24...... 0 16...... 1,050 111 27...... 68.0 28...... 137 13...... 217 Sept. 3...... 115 30...... 10...... 160 Jan. 6, 1967.. 119 165 14...... 167 13...... 17...... 173 221 24...... 171 23...... 28...... 175 24...... 153 Oct. 1...... 149 25...... 759 92.0 5...... 135 Feb. 1...... 126 158 8...... 134 3...... 112 101 140 12...... 31.2 101 169 15...... 32.0 17...... 160 135 19...... 38.9 24...... 61.1 115 22...... 91 Mar. 3...... 52.9 26...... 0 63.3 Nov. 18...... 151 17...... 9.92 23...... 627 3.45 25...... 1,130 Apr. 7...... 26...... 1,010 14...... 71 Dec. 6...... 180 21...... 8...... 117 0 17...... 116 May 5 ...... 47.6 28...... 79.2 23...... 104 12...... 29...... Jan. 4, 1966... 724 Sept. 3. . 5, 1965... 25.8 7...... 141 26...... 14...... 88.0 12...... 21...... 69.2 9...... 179 15...... 33.4 28...... 57.5 16...... 19...... 84.6 Feb. 4...... 60.5 23......

:a Ana River, lat 33° 50'55", long 117°50'0 5", in SW>« s ec.4, T.4 S. , R.9 W. , at Jeffei Street Bridge, 1 mile north of Olive, wa.ter years 1961-6; (Me ously 1938-60) Disch. Disch. Date Disch. Date Disch. June 12, 1961., 207 4, 1961. 46.6 3, 1960... 195 Feb. 17, 1961.. . 131 155 237 20...... , 120 16...... 234 7...... 19...... 135 159 10...... 162 27...... 113 147 131 Mar. 3...... 121 23...... 160 14...... 26...... 185 163 17...... 158 6...... 164 5, 1962. 170 130 10...... , 144 30...... 149 21...... July 3...... 153 174 24...... 136 13...... 168 151 126 17...... , 126 28...... 10...... 173 145 31...... 162 20...... , 114 116 179 24...... 122 14...... 170 . 4...... 17...... 170 138 7...... 176 27...... 104 194 168 31...... , 123 21...... 152 10...... 24...... 162 111 14...... 172 Apr. 3...... 159 100 149 62.8 28...... 123 111 21...... 162 10...... 0 301 14...... 88.8 Sept. 30...... 0 25...... 143 97.6 90.6 . 2, 1961... 8.43 17...... 88.3 Oct. 20...... 76.7 23...... 76.0 429 24...... 0 27...... 6...... 5.75 266 13...... 117 May 12...... Ill 39...... 15...... , 130 Nov. 3...... 177 16...... 111 6...... 147 117 20...... 106 19...... 130 206 121 22...... , 161 10...... 164 23...... 13...... 75.1 221 27...... 159 26...... 153 179 159 29...... 154 17...... 124 30...... 24...... , . 195 169 June 2...... 45.3 191 5 , , isr 212 10...... 161 9 .. 210 Dec. 1...... SANTA ANA RIVER BASIN

SANTA ANA RIVER ABSORPTION STUDIES CONTINUED Date Disch. Date Disch. Disch. Apr. 2, 1962... 192 Mar. 29, 1963... 37.1 5, 1964... 156 6...... 187 Apr. 2...... 154 9...... 152 13...... 186 5...... 218 12...... 159 16...... 216 9...... 109 16...... 172 20...... 250 12...... 102 19...... 176 23...... 228 16...... 130 23...... 167 Apr. 27...... 255 19...... 122 26...... 163 30...... 247 23...... 202 30...... 169 4...... 262 26...... 187 3...... 179 7...... 177 30...... 133 7...... 190 11...... 287 3...... 195 10...... 163 14...... 294 7...... 152 14...... 181 17...... 260 10...... 125 17...... 165 21...... 172 14...... 67.1 21...... 187 25...... 248 17...... 112 24...... 174 28...... 250 21...... 175 28...... 162 1...... 213 24...... 184 31...... 155 4...... 209 28...... 155 4...... 145 July 8...... 224 31...... 193 7...... 151 Sept. 11...... 245 4...... 97.9 0 22...... 189 7...... 133 0 26...... 208 Sept 11...... 50.9 188 29...... 204 13...... 29.2 167 3...... 210 17...... 60.9 199 6...... 199 20...... 108 127 10...... 221 24...... 11.3 116 13...... 231 27...... 112 141 17...... 262 1...... 72.6 128 20...... 265 4...... 53.9 104 Dec. 24...... 281 8...... 123 89.8 27...... 280 11...... 144 150 3...... 196 15...... 136 71.1 7...... 181 18...... 131 75.3 10...... 256 22...... 113 75.9 14;...... 187 25...... 126 19.4 17...... 235 29...... 141 68.1 21...... 239 1...... 141 45.4 24...... 231 5...... 82.6 64.5 28...... 219 7...... 105 0 31...... 214 12...... 141 Jan. 26, 1965... Sept, 7...... 201 19...... 151 12...... 208 21...... 237 14...... 229 29...... 178 18...... 210 3...... 149 30.2 21...... 228 6...... 154 34.4 25...... 175 10...... 125 57.1 28...... 184 13...... 110 45.8 2...... 183 20..;...... 96.5 50.6 5...... 191 27...... 86.2 64.9 9...... 225 31...... 109 16.1 12...... 255 3, 1964... 100 58.8 16...... 216 7...... 129 81.7 19...... 235 10...... 123 224 23...... 264 14...... 145 131 26...... 258 17...... 120 83.6 30...... 221 23...... 180 29.5 2...... 190 28...... 10. 0 6...... 208 7...... 44. 169 9...... 194 7...... 47. 6.9 16...... 162 11...... 87. 1 9 20...... 141 14...... 67. 9.5 23...... 138 18...... 68. 7.0 27...... 157 21...... 61. 7.9 30...... 124 25...... 69. 31.2 4...... 154 28...... 47. 22.0 7...... 157 3...... 70. 23.6 11...... 203 6...... S7. 12.0 14...... 232 10...... 69.8 25.5 18...... 8.06 13...... 52.3 16.1 21...... 54.9 17...... 107 5.02 28...... 77.5 20...... 112 10.9 4, 1963... 23.1 24...... 191 127 8...... 90.1 27...... 153 1S2 11...... 21.2 31...... 181 15...... 22.5 Apr. 3...... 165 Sept. 18...... 12.8 7...... 145 ..... 51.0 22...... 32.7 10...... 134 24...... 55.9 25...... 69.2 14...... 143 28...... 73.9 29...... 102 17...... 149 I...... 62.6 1...... 124 21...... 145 8...... 46.7 5...... 112 24...... 173 12...... 0 8...... 114 1...... 129 22...... 0 11...... 348 5...... 151 Nov. 23...... 401 15...... 73.9 8...... 151 Dec. 17...... 75.8 19...... 73.8 12...... 142 Jan. 7, 1966... 83.1 26...... 133 15...... 131 14...... 45.9 1...... 160 19...... 148 21...... 12.1 8...... 232 22...... 181 28...... 33.4 12...... 134 26...... 178 4...... 38.7 15...... 195 29...... 148 11...... 94.0 19...... 41.0 2...... 148 18...... 41.3 SANTA ANA RIVER BASIN

SANTA ANA RIVER ABSORPTION STUDIES CONTINUED Santa Ana River, lat 33°50'08", long 117°51'49", in San Juan Cajon de Santa Ana Grant, at Anaheim-Olive Bridge, 1.1 miles west of Olive, water years 1961-68 (Measured previously 1938-60) Date Disch. Date Dis ch. Date Disch. Date Disch. Oct. 3, 1960... 7.37 Apr. 2, 1962.. . 96 .8 June 7, 1963.. . 47 .7 Oct. 27, 1964... 58.8 7...... 15.3 6...... 91 .5 11...... 28 .?, 30...... 34.8 10...... 1.19 13...... 25 .9 14...... 90 4 Nov. 3...... 35.4 14...... 2.02 16...... 68 .1 18...... 107 6...... 6.83 17...... 27 20. > ...... 98 .9 21...... 135 10...... 53.1 21...... 1.20 23...... 79 .1 25...... 82 .8 0 24...... 1.33 27...... 79 .1 28...... 79 .6 43.4 28...... 1.46 30 ...... 77 .1 Aug. 20...... 41 .4 1.30 31...... 1.73 May 4...... 84 .9 23...... 92 .2 Nov. 4...... 12.0 7...... 14 .2 27...... 131 Mar. 16, 1965... 0 7...... 41.4 11...... 119 30 ...... 55 .9 19...... 4.26 10...... 16.4 14...... 133 Sept . 6...... 64 .3 23...... 4.57 14...... 16.2 17...... 154 11...... 70 .6 26...... 0 18...... 39.0 21...... 14 .9 13...... 82 .8 Apr. 6...... 0 21...... 16.7 25...... 114 17...... 120 12...... 40.7 25...... 27.S 28...... 109 20...... 21 .6 16...... 0 Dec. 2...... 0 June 1...... 54 .5 24...... 114 20...... 6.24 Jan. 13, 1961,. . 10.2 4...... 65 .8 27...... 121 23...... 0 16...... 13.0 11...... 135 Oct. 1...... 103 July 23...... 0 20...... 30.0 22...... 105 4...... 117 27...... 21.3 23...... 36.7 26...... 107 8...... 41 .6 30...... 25.5 27...... 66.7 29...... 101 15...... 79 .5 Aug. 6...... 6.16 30...... 47.6 July 3...... 85 .2 18...... 110 13...... 4.70 Feb. 3...... 46.9 6...... 0 22...... 66 .6 24...... 20.8 6...... 43.0 10...... 84 .3 25...... 80 .4 27...... 0 10...... 22.7 13...... 58 .1 29...... 102 Sept. 3...... 35.7 17...... 6.16 17...... 77 .6 Nov. 1...... 74 .2 14...... 4.78 20...... 20 20...... 99 .5 S...... 24 .2 17...... 0 27...... 12.6 24...... 96 .2 7...... 42 .2 24...... 19.1 Mar. 3...... 4.77 27...... , 93 .6 12...... 65 .1 28...... 23.7 6...... 24.6 31...... 94 .8 19...... 67 .9 Oct. 1...... 28.6 10...... 9.86 Aug. 3...... 82 .3 21...... 81 .6 5...... 23.0 13...... 12.7 7...... 56 .4 29...... 63 .5 8...... 20.4 17...... 10.4 10,...... 87 .1 Dec. 3...... 52 .7 12...... 20.4 20...... 2.75 14...... 36 .9 6...... 50 .0 19...... 25.6 24...... 3.04 17...... 59 .3 10...... 55 ,4 22. 27...... 4.44 21...... 87 .8 13...... 28 .5 Nov. 30...... 626 31...... 10.0 24., ...... 81 .6 20,..., ... . 22 .6 Dec, 17...... 0 Apr. 3...... 16.5 28...... 68 .0 24...... 23 .9 Feb. 4, 1966... 0 7...... 1.02 31,. ,'..,.. . 70 .7 27...... 21 .1 11...... 31,0 10...... 0 Sept , 7, ...... 68 ,1 31., ...... 20 .9 18.,....'.., 0 14...... 2.90 12., ...... 6'1 .4 Jan. 3, 1964.. . 41 .8 25..,...... 0 17...... 96 14., ...... 65 .3 .7, ...... 36 .0 Mar. 4...... 30 21...... 1.04 18...... 70 .8 10...... 14 .6 11...... 3,8 24...... 0 21...... 97 .9 14...... 96 .5 25...... ,.. 0 May 12...... 5.27 25,..,....' . 61 .0 17., ...... 26 0 Apr. 22.....,,.. 0 15, ...... 11.6 28...... 60 .0 23., ...... 18 .'0 29...... 58.9 19...... 3.89 Oct. 2...... SO .5 Feb. 11...... 7 .03 May 6...... 86,5 22...... 20.1 12...... 69 .2 18...... 12 .0 13...... 41.9 26...... 22.5 16...... 44 .S 21, ...... 7 .16 20...... 24.9 29...... 24.0 19, ...... 60 .9 25...... 10 .8 27,...,,... 57,2 June S...... 34.5 23...... 77 .9 28...... 0 June 3...... 78.7 9, ...... 94.7 26...... 71 .8 Mar. 13...... 0 10...... 0 12...... 67.8 30,, ...... 44 .5 17...... 43 .4 S»pt.21...... 0 16...... 45.5 Nov. 2...... 64 .5 20,...... 29 .7 .30...... 2.33 19...... 27.2 6...... 73 .4 24., ...... 32 .3 Oct. 28...... 16.8 23...... 7.86 . 64 .2 27., ...... 43 .2 Nov. 4...... 31.0 26...... 15.5 16...... 47 .1 31...... 31 ,6 8...... 0 30...... 22.4 20.....,, . . 62 .0 Apr. 3...... 68 ,6 18...... 2.40 July 3...... 20.4 23...... 62 .1 7...... 42 .4 25..,.,..., 2.33 7,...... 22.5 27.,,.,., . . 58 .9 10...... 35 .3 Dec. 2,...... 0 10,...... 40,0 30...... 32 .2 14...... 36 ,n 9...... 90S 14...... 15.8 Dee. 4...... 45 .5 17...... 38 .0 Jan. 6, 1967... 14.1 17., ...... 22.0 7...... 42 .2 21...... 38 ,7. 13...... 0 24..,.,..., 35.5 11...... 50 ,7 24...... 42 fi 20.,.,.,,.. 24.0 28...... 15.5 14...... 98 .5 May 1...... 29 .3 Feb. 10...... 12.5 31...... 0 Jan. 4, 1963,. 1 .31 5., ...... 48 .6 17. 0 Sept.30...... 0 8...... 15 8...... 48 ,5 24...... 44.9 Oct. 27...... 119 11...... 3 .63 12...... 36 .3 Mar. 3...... 46.6 30...... 151 15...... 6 ,68 15...... 33 ,6 10...... 0 Nov. 3...... 67.3 18...... 7 .22 19...... 32 .6 Apr. 7...... 91.7 6...... 29.7 22...... 13 .9 22...... 36 .3 14...... 92.4 10...... 56.7 25...... 10 ,0 26...... 57,,ft , 21...... 21.4 13...... 1,96 29...... 17 .0 29...... 41 .3 28...... 0 17...... 19.6 Feb. 1...... 29 .4 June 2...... 33,,4 Sept.29...... 0 24...... 73.3 5,...... 46 .2 5...... 35..6 Oct. 6...... 0 27...... 90.9 8...... 44 .7 9...... 35 ,R 13...... 0 Dec. 1...... 63.2 11...... 203 12...... 34,,9 20...... 0 8...... 73.7 19...... 32 .1 16...... 54,,2 27...... 0 15...... 65.6 26...... 34 .6 19...... 51,,8 Nov. 3...... 0 22...... 49.4 Mar. 1...... 27 .4 23.. .'...... 54,,2 10...... 0 29...... 42.8 5. .,,,,.. . 73 .0 30 ...... , 36,,0 17...... 0 Jan. 5, '1962.., 87,8 8...... 48 .1 July 3...... 48, S 21...... 303 8...... 66.0 12...... 62 .0 7...... 60, 1 .Dec. 1.,..,.... 97.6 12,...... 0 IS...... 38 .3 10...... 59,,1 8...... 13.6 15...... 46.7 19...,.,.. , 12 ,5 14...... 38, 3 22...... 0 19...... 28.3 Apr. 2...... 49 .3 17...... 50,,4 29...... 0 23...... 36.2 5...... 137 21...... 52,,6 Jan. 5, 1968... 0 26...... 116 9...... 43 .3 24...... 53,,ft 12...... 0 29...... 24", 4 16...... 105 28...... 33, ft 19. Feb. 2...... 19.3 19, ...... 7 .45 31...... 6, 06 26. 0 5...... 24.2 23...... 89 .6 Aug. 4...... 19,,4 Feb. 2. 10...... 230 26...... 103 7...... 26,,1 9. 14...... 30.4 30 ...... 46 .9 11...... 5,,86 16. 21...... 387 May 3...... 84 .1 14...... 0 23. 26...... 0 7...... 72 .9 25...... 0 Mar. 1. Mar. 5...... 87.7 10...... 75 .1 Sept. 29...... 67,,4 22. 8...... 20.0 14...... 142 Oct. 2., ...... 7, 37 29. 12...... 115 17...... 73 .8 6,...... 16. 0 Apr, 5. 16...... 109 21...... 77 .7 9...... 8, 41 12. 19...... 88.6 24,...... 83 .8 13...... 19.,3 19. 23...... 66.9 28...... 95 .0 16...... 19.,4 May 3. 26...... 62.5 31...... 109 20...... 26. 7 30...... 72.0 June 4., ...... 130 23...... 0 SANTA ANA RIVBR 1ASIN

SANTA ANA RJVIR ABSORPTION STUDI1S--CONTINUED

Date Diseh. Date Ditch. Date Dise^. Date May 24, 1968... 0 July S, 1968... 0 Aug. 2, 1968... 0 Sept. 6, 1968 31...... 0 12...... 0 16...... 0 13...... June 7...... 0 19...... 0 23...... 0 20...... 21...... 0 26...... 0 30...... 0 27...... 28...... 0

Santa Ana River, lat 33 S 47'17", long 117*5J'54", in Santiago de Santa Ana Grant, at Chapman Ave. Bridge, 1.7 miles west of Orange, Orange County, water years 1962-6S (Measured previously 1938-47, SO, 52, 54, S6, 58) Date Diseh. Date Diseh. Date Diseh. Date Diseh. Nov. 28, 1961... .1 J»n. 26, 1962... 0 Apr. 9, 1962... 0 Aug. 23, 1962... 1.0 Dee. 8...... 4.01 Feb. 2...... 0 June 29...... fl.O Feb. 11, 1963... 42.2 IS...... 0 10...... 1S8 July 3...... 40 Mar. 19...... 8.9i Jan. IS, 1962... .60 21...... 219 10...... 1.0 May 21...... 4.92 19...... 0 26...... 0 13...... 1.36 23...... 10.1 Apr. 6...... 1.5 17...... 0

Santa Ana River, lat 33°40 I 21", long 117"S1'42", in SBHSWis gee.5, T.6 S., R.10 W., at Adams Ave. Bridge, 2.5 miles northwest of Costa Mesa, water year 1962 (Not measured previously) Date Biseh, D»te Diseh. Date " Diseh. Date Diseh. Jan. 23, 1962... IS.9 Feb. 14, 1962... 9.7 Feb. 21, 1962... 245 Feb. 23, 1962... 7.32 Feb. 10...... 167

Page Page Accuracy of field data and computed results... 7 Corona, Calif., Santa Ana River near...... 215-216 Acre-foot, definition of...... 2 Temescal Creek at...... 234-235 Agua Caliente Creek near Warner Springs, Temescal Creek near...... 231-233 Calif...... 61-63 Aguanga, Calif., Tern cula Creek near...... 84-8 near Dulzura, Calif...... !...... 16 Alamo Creek near Nipi mo, Calif...... 511-513 at Barratt Dam, near Dulzura, Calif...... 14 Alhambra Wash, Calif 353-355 at Morena Dam, Calif...... 13 Alisal Creek near So rang, Calif...... 477-479 Coyote Creek (San Gabriel River hasin), at Aliso Canyon Creek n ar New Cuyama, Calif..... 507 Los Alamitos, Calif...... 313-315 Aliso Creek at El To i, Calif...... 123-125 Coyote Creek (Ventura River hasin), near Alpine, Calif., Swee ater River 36 Oak View, Calif...... 429-431 Arlington, Calif., Riverside Water Quality near Ventura, Calif...... 435 Control Plant near...... 203-205 Cristianitos Creek near San Clemente, Santa Ana River near...... 202,206-208 Calif...... 109-110 Sheehan ditch near...... 203-205 Cubic feet per second per square mile, Arrowhead Springs, Calif., East Twin Creek definition of...... 2 near...... 167-169 Cubic foot per second, definition of...... 2 Waterman Canyon Creek near...... 170-172 Cucamonga Creek, near Mira Loma, Calif...... 251-252 Arroyo Grande, Calif., Huasna River near Upland, Calif...... 248-250 near...... 514-516 Culver City, Calif., Ballona Creek near...... 371-373 Arroyo Seco near Pasadena, Calif...... 340-342 Cuyama River, below Buckhorn Canyon, near Arroyo Simi near Simi, Calif...... 380-381 Santa Maria, Calif...... 508-510 Arroyo Trahuco near San Juan Capistrano, below Twitchell Dam, Calif...... 517-519 Calif...... 119-121 Cuyamaca Reservoir, Calif...... 38,40-42 Atascadero Creek near Goleta, Calif...... 445-447 Azusa, Calif., San Gabriel River near...... 273 Data, accuracy of...... 7 Azusa Canal, Calif., diversion by...... 273 explanation of...... 3-6 other available...... 11 Baja California, Mexico, Rodriguez Reservoir Day Creek near Ftiwanda, Calif...... 209-214 at. 24 ~ " " ek near Fallbrook, Calif...... 97-98 Baldwin Park, Calif., San Gabriel River Descanso, Calif., Japacha Creek near...... 29-30 near...... 277-279 Sweetwater River near...... 31-35 Ballona Creek near Culver City, Calif...... 371-373 Devil Canyon Creek near San Bernardino, Barrett Junction, Calif., Potrero Creek Calif...... 195-197 tributary near...... IS Discharge, definition of...... 2 Barrett Reservoir, Calif...... 14,16-18,21-23,25 Downey, Calif., Los Angeles River Bautista Creek, near Hemet, Calif...... 225 near...... 343-345 near Valle Vista, Calif...... 226 Rio Hondo near...... 365-367 Drainage area, definition of...... 2 near,.... i.'....,...... 161 -163 Duarte, Calif., Fish Creek near...... 274-276 Big Bear Lake near Big Bear Lake, Calif...... 130 Dulzura, Calif., Cottonwood Creek near...... 14,16-18 Big Santa Anita flood-control reservoir, Tijuana River near...... 21-23 Calif...... 350-352,353-355 Wilson Creek tributary near...... 14 Big Tujunga flood-control reservoir, nurkee ditch, Calif...... 215-216 Calif...... 328-330,334-336 Bonsall, Calif., San Luis Rey River near...... 78-80 East Highlands, Calif., Plunge Creek near....146-151 Boulder Creek at Cuyamaca Reservoir, near East Twin Creek near Arrowhead Springs, Julian, Calif...... 38 Calif...... 167-169 Brea, Calif., Fullerton Creek near...... 307-309 Eaton Creek near Pasadena, Calif...... 349 Brea Creek, at Fullerton, Calif...... 304-306 below Brea Dam, near Fullerton, Calif...... 301-303 Calif...... '...... 350-352,353-355 Brea flood-control reservoir, El Capitan Dam, Calif., San Diego River at..., 39 Calif...... 301-303,304-306,313-315 El Capitan Reservoir, Calif...... 39,40-42 Buellton, Calif., Santa Ynez River Fl Monte, Calif., San Jose Creek near...... 286-288 near...... 485-487 Fl Tore, Calif., Aliso Creek at...... 123-125 Zaca Creek near...... 483-484 Flsinore, Calif., Flsinore Lake at...... 231 San Jacinto River near...... 228-230 Cajon Creek near Keenbrook, Calif...... 189-191 Flsinore Lake at Flsinore, Calif...... 231 Calahasas, Calif., Malibu Creek near...... 377-379 Ftiwanda, Calif., Day Creek near...... 209-214 Calleguas Creek at Csmarillo State Hospital, Ftiwanda Water Co.'s diversion near Calif...... 382-383 Ftiwanda, Calif...... 209-214 Calleguas Creek basin, crest-stage partial- record stations in...... 539 Fairview Land and Water Co.'s pipeline near gaging-station records in...... 380-383 San Jacinto, Calif...... 219-224 Camarillo State Hospital, Calif., Cslleguns Fallbrook, Calif., De Luz Creek near...... 97-98 Creek at...... 382-383 Santa Margarita River near...... 94-96 Camp Bonita, Calif., Fast Fork San Gabriel Fillmore, Calif.. Sespe Creek near...... 400-405 River near...... 267-269 Fillmore Irrigation Co.'s canal near Camp Rincon, Calif., West Fork San fiahriel Fillmore, Calif...... 400-405 River at...... 270-272 Fisb Creek near Duarte, Calif...... 274-276 Campo Creek near Campo, Calif...... 19-20 Fontana, Calif., Lytle Creek near...... 183-188 Capistrano Water Co.'s canal near San Juan Fontana Union Water Co.'s infiltration line Capistrano, Calif...... 113-118 near Fontana. Calif...... 183-188 Carbon Canyon flood-control reservoir, Foxen Creek near Sisquoc, Calif...... 526-528 Calif...... 256,313-315 Fullerton, Calif., Brea Creek at...... 304-306 Carbon Creek below Carbon Canyon Dam, Rrea Creek near...... 301-303 Calif...... 256 Fullerton Creek at...... 310-312 Carpinteria Creek near Carpinteria, Calif....442-444 Fullerton Creek, at Richman Avenue, at Casitas Reservoir, Calif...... 435,436-441 Fullerton, Calif...... 310-312 Casitas Springs, Calif., San Antonio Creek below Fullerton Dam, near Brea, Calif...... 307-309 at...... 426-428 Fullerton flood-control reservoir, Casmalia, Calif., San Antonio Creek Calif...... 307-309,310-312,313-315 near...... 503-505 San Antonio Creek tributary near...... 506 Gage height, definition of...... 2 Cfs-day, definition of...... 2 Gaging station, definition of...... 2 Chino Creek, at Schaefer Avenue, near Garey, Calif., Sisquoc River near...... 532-534 Chino, Calif...... 245 Gaviota Creek near Gaviota, Calif...... 451-453 near Chino, Calif...... 246-247 Gibraltar Reservoir, Calif...... 459 City Creek near Highland, Calif...... 152-157 Glendora, Calif., Little Dalton Creek City Creek Water Co.'s canal near near...... 283-285 Highland, Calif...... 152-157 Goleta, Calif., Atascadero Creek near...... 445-447 Claremont, Calif,, San Antonio Creek San Jose Creek near...... 448-450 near...... 236-241 Guadalupe, Calif., Santa Maria River at...... 535-536 Cogswell Reservoir, Guejito Creek near San Pasqual, Calif...... 53-55 Calif...... 273,277-279,289-291,295-297,298-300 Colby Ranch, Calif., Tujunga Creek near...... 325-327 Hansen Dam, Calif., Tujunga Creek below...... 334-336 Colton, Calif., Lytle Creek at...... 198-200 Hansen flood-control reservoir, Meeks and Daley Canal near...... 180-182 Calif...... 334-336.337-339,343-345,368-370 Santa Ana River at...... 201 Hemet, Calif., Bautista Creek near...... 225 Contents, definition of...... 2 Highland, Calif., City Creek Control, definition of...... 2 near...... 152-157 Cooperation, record of...... 1 Hopper Creek near Piru, Calif...... 394-396 549 Past P»«e Huasna River near Arroyo firande, Calif...... 514-516 Loma Linda, Calif., San Timoteo Creek Hydrologic bench-mark station, near...... 165-166 definition of...... 2 Lompoe, Calif., Jalama Creek ntiir...... 454-486 Salsipuedes Creek near...... 491-493 Idyllwild, Calif,, Lake Hemet near...... 217 Santa Yne! River International Hydrological Decade (1HD) near...... 488-490,494-496,497-499,500-502 Rivtr Statiens, definition of...... 3 Lone Pine Creek near Keenbrook,Calif...... 192-194 trvine, Culif., San Diego Creek near...... 126-121 Long Beach, Culif., Los Angeles River at.... .368-370 Los Alamitos, Calif., Coyote Creek at...... 313-315 Jalama Creek near Lompoe, Calif.,,.,,....,,..454-456 San Gabriel River near...... 298-300 Jameson Like, Calif...... 457-458 Los Angeles River, at Long Bench, Jgraul Creek ntar Jamul, Calif...... 26-28 Calif...... ,388-370 Japacha Creek near Descanso, Calif...... 29-30 at Los Angtles, Ctlif...... 317-339 Julian, Calif,, Boulder Creek near...... 38 at Sepuiveda Dam, Calif...... 316-318 near Downey, Calif...... 343-345 Keenbrook, Calif., Cajon Creek near...... 189-191 Los Angelts River basin, crest-stage Lone Pine Creek near....,...... ,...,.,,, 192-194 paftial-reeord stations in.,.,.,....,,.. 539 gaging-station records in...... 316-370 La Ires Creek near Sisquoe, Calif...... 523-525 schematic diagram showing diversions La Canada, Calif., North Fork Mill Creek and storage in,...... 266 near.,.,...,...,,,...... ,...... ,322-324 Los Penasquitos Creek near Poway, Lake Cachuraa near Santa Ynei, Calif...... 469-470 Calif...... 43-45 Lake Heratt near Idyllwild, Calif...... 217 Los Penasquitos Creek basin, crest-stage Lake Heraet Water Co.'s upper and lower partial-record stations in...... 537 canals near San Jacinto, Calif...... 219-224 Lytle Creek, at Colton, Calif...... 198-200 Lake llenshaw, Calif...... 67,78-80,81-83 near Fontana, Calif ...... 183-181 Lake Hodges, Calif...... eO San Dieguito River at...... eO Malibu Creek at Crater Camp, near Lake Loveland, Calif...... 36 Calabasas, Calif...... 377-379 Lake Plru, near Piru, Cillf. i...... 390 Malibu Creek basin, crest-stage partial- Piru Creek above...... 387-389 record stations in,...... 539 Lakes and reservoirs; Map of the United States...... 8 garrett Reservoir, Calif,,.....,.14,16-18,21-23,25 Matilija Creek, above reservoir, near Big Sear Lake near gig Bear Lake, Calif,,... 130 Matllijn Hot Springs, Calif...,.,....,.414-416 Big Santa Anita flood-control reservoir, at Matilija Hot Springs, Calif...... 417-419 Calif...... ,350-352,353-358 North Fork, at Matilija Hot Spring!, Sig Tujunga flood-control reservoir, . Calif...... 420-422 Calif...... 328-330,334-336 Matilija Hot Springs, Calif., Matilija irea flood-control reservoir, . Creek at...... 417-419 Calif....,.,..,.,....,.301-303,304-306,313-315 Matilija Creek near...... 414-416 Cathuraa, Lake, near Santa Ynez, Calif...... 469-470 North Pork Matilija Creek at...... 420-422 Carbon Canyon flood-control reservoir, Matilija Reservoir at Matilija Hot Calif...... 256,313-318 Springs, Calif,.,.,...... ,..,,,423-428,436-441 Casitas Reservoir, Calif...... 435,43'6-441 Meeks and Daley Canal near Colton, Cogswell Reservoir, Calif...... /...... 180-182 Calif...... 273,277-279,289-291,295-297,298-300 Meiners Oaks, Calif., Ventura River Cuyaraaea Reservoir, Calif...... 38,40-42 near...... 423-425 Baton flood-control reservoir, Mentone, Calif., Santa Ana River near...... 131-136 Calif...... 350-382,383-315 Santa Ana River spreading diversion El Capitan Reservoir, Calif...... 39,40-42 near...... P...... 137-139 BlJinore Lake at Blsinore, Calif,.,,,.,,,,.. 231 Mesa Grsnde, Calif., San Luis Roy R_iver Fullerton flood-control restrvoir, near...... 67 Calif...... 307.309,310-312,313-315 Mill Creek (Los Angeles River basin), - Gibraltar Reservoir, Calif...... 458 North Fork, near La Canada, Calif...... 322-324 Hansen flood-control reservoir, Mill Creek (Santa Ana River basin) near Calif.,,...... 334-336,337-339,343-345,368-370 Yutiaipa, Calif,...... ,..,.....,...... 140-145 Hemet, Lake, near Idyllwild, Calif...... 217 Mill Creek power canals Nos, 1, 2, and 3 Henshaw, Lake, Calif...... 67,78-80,81-83 near Yucaipa, Calif...... 140-14S Hodges, Lake, Calif...... ,...,,..,..,...., 60 Mira Loma, Calif., Cueamonga Creek Jameson Lake. Calif...... 457-458 near...... 251-252 Loveland, Lake, Calif...... 36 Mission Creek, below Whittler Narrows Matilija Reservoir at Matilija Hot Dara, Calif...... 359-361 Springs, Calif...... 423-425,436-441 near Montebello, Calif...... 3S6-358 Morena Reservoir, Calif...... 13,16-18,21-23,25 Mission Vlejo, Calif., Oso Creek near,...... 122 Morris Reservoir, . Modjeska, Calif., Santiago Creek at...... 257-259 Calif.., ...273,277-279,289-291,295-297,298-300-. Montalvo, Calif., Santa Clara River at...... 410-413 Pacoiraa flood-control reservoir, Montebello, Calif., Mission Creek near...... ,356-358 Calif...... 319-321 Rio Hondo near...... ,.,,.,...... 353-355 Plru, Lake, near Piru, Calif...... 390 Montecito, Calif., Santa Ynez River Prado Reservoir, Calif...... 253-255,263-265 near...... 457-458 Railroad Canyon Reservoir, , Moreni flara, Calif., Cottonwood Creek at,....., 13 Calif...... ,,,,..228-230 Morena Reservoir, Rodriguez Reservoir at Rodriguez Dam, Calif...... 13,16-18,21-23,25 Baja California, Mexico...... 24 Morris Reservoir, San Antonio flood-control reservoir, Calif...... 273,277-279,289-291,295-297,298-300 Calif...... ,242-244,246-247 Murrieta Creek at Teraecula, Calif...... 88-90 San Diraas flood-control reservoir, Calif...,..,...... ,...... ,.,..,..,,,280-282 Nestor, Calif., Tijuana River near...... 25 San Gabriel flood-control reservoir, New Cuyaraa, Calif., Aliso Canyon Creek Calif...... 273,277-279,289-291,295-297,298-300 near...... 507 San Vicente Reservoir, Calif...... 40-42 Nipomo, Calif., Alarao Creek near...... 511-513 Santa Fe flood-control reservoir, Calif...... 277-279,280-291,295-297,298-300 Oak View, Calif., Coyote Creek near...... 429-431 Santiago Reservoir, Calif.....,..,..,..,,.., 260 Santa Ana Creek near...... ,.,...... ,,.,...432-434 Sawplt flood-control reservoir, Oceanside, Calif., Las Flores Creek Calif...... 350-352,353-355 near...... 102-103 Sepulveda flood-control reservoir, San Luis Rey River at...... 81-83 Calif...,..,,..316-318,337-339,343-345,368-370 Order, downstream, and station number...... 3 Sutherland Reservoir, Calif...... 46 Oso Creek at Crown Valley Parkway, near Twitchell Reservoir, Calif...... 517-519,535-536 Mission Viejo, Calif...... 122 Vail Lake, Calif...... 87 Villa Park flood-control reservoir, Paeoiras Creek near San Fernando, Calif...... 319-321 Cslif...... 261-262 Pacoima flood-control reservoir, Calif...... 319-321 Whittier Narrows flood-control reservoir, Pala, Calif., San Luis Rey River near...... ;. 75-77 Calif...... 295-297,362-364,365-367 San Luis Rey Rivtr tributary near...... 74 Las Flores Creek near Oceanside, Calif...... ,102-103 Partial-record station, definition of,...,.,,. 3 Little tlalton Creek near Glendora, Calif.....283-285 Pasadena, Calif., Arroyo Seco near...... 340-342 Little San Gorgonio Creek near Beaumont, Eaton Creek near...... 349 Calif...... 161-163 Pauma Creek near Pauma Valley, Calif...... 68-73 Little Sycamore Canyon Creek basin, crest- Perris Valley Storm Drain at Nuevo Road, stage partial-record stations in...... 539 near Perris, Calif...... 227 Little Tujunga Creek near San Fernando, Pico, Calif., San Gabriel River at...... 295-297 Calif...... 331-333 Piru, Calif., Hopper Creek near...... 394-396 Page Page Piru, Calif., Lake Piru near...... 390 San Juan Creek near San Juan Capistrano, Piru Creek near...... 391-393 Calif,...... 113-118 Piru Creek, above Lake Piru, Calif...... 387-389 San Juan Creek basin, crest-stage below San Felicia Dam, Calif...... 391-393 partial-record stations in...... 538 near Piru, Calif...... 391-393 gaging-station records in...... 113-122 Plunge Creek, diversions near East San Luis Rey River, at Lake Henshaw, near Highlands, Calif...... 146-151 Mesa Grande, Calif...... 67 near East Highlands, Calif...... 146-151 at Monserate Narrows, near Pala, Calif....,, 75-77 at Oceanslde, Calif...... 81-83 Junction, Calif...... 15 near Bonsall, Calif...... 78-80 West Fork, near Warner Springs, Calif...,,.. 64-66 'near. .!.'...... ,...... ,...... ,... 43-45 San Luis Rey River tributary near Pala, Prado Dam, Calif., Santa Ana River below. .,. . . 253- 255 Calif...... 74 Prado Reservoir, Calif...... 253-255,263-265 San Luis Rey River basin, crest-stage Preface...... Ill partial-record stations in...... 537 Publications on streamflow, by Geological gaging-station records in...... 61-83 Survey...... 7-11 San Mateo Creek, at San Onofre, Calif...... 111-112 by State agencies...... 12 near San Clemente, Calif...... 107-108 San Mateo Creek basin, crest-stage Railroad Canyon Reservoir, Calif...... 228-230 partial-record stations in...... 538 Ramona, Calif., Santa Maria Creek near,....,.. 56-58 gaging-station records in..,....,....,,.,,.107-112 Santa Ysabel Creek near...... 47-49 San Onofre, Calif., San Mateo Creek Redlands, Calif., San Timoteo Creek near...... 164 at. ....,,,..,. .,,.,..,...... ,...... 111-112 Rio Hondo, above Whittier Narrows Dam, San Onofre Creek at,..,,,,,.,...... ,..,..,.. 106 Calif...... 350-352 San Onofre Creek near...... ,104-105 below Whittier Narrows Dam, Calif...... ,362-364 San Onofre Creek, at San Onofre, Calif,....,,. 106 near Downey, Calif...... 365-367 near San Onofre, Calif...,...,.,,,...,.....104-105 near Montebello, Calif...... 353-355 San Onofre Creek basin, gaging-station Rio Hondo flood-flow channel at Nhittier records in,,...... ,.,,...,...... ,.,.104-106 Narrows Dam, Calif...... 292-294 San Pasqual, Calif., Guejito Creek near...... 53-55 Riverside Water Quality Control Plant at San Dieguito River near..,...,,.....,...... 59 Riverside Narrows, near Arlington, Santa Ysabel Creek near.....,...... ,,..,.., 50-52 Calif...... ,..,203-205 San Timoteo Creek, near Loma Linda, Calif... .165-166 Rodriguez Reservoir at Rodriguez Dam, near Redlands, Calif..,....,,...... ,..,,.. 164 Baja California, Mexico...... 24 San Vicente Reservoir, Calif...... ,.,.,..,,.. 40-42 Runoff in inches, definition of...... 3 Santa Agueda Creek near Santa Ynez, Calif...... ,,,...,....,....,...... ,,...474-476 Salsipuedes Creek near Lompoc, Calif...... 491-493 Santa Ana, Calif., Santa Ana River at,,...... 263-265 San Antonio Creek (tributary to Chino Creek), Santa Ana, Calif,, Santiago Creek at.,,,.....261-262 below San Antonio Dam, Calif...... 242-244 Santa Ana Creek near Oak View, Calif...... ,432-434 near Clareir.ont, Calif...... 236-241 Santa Ana River, absorption studies,.,,,...,.543-547 Sun Antonio Creek [tributary to Pacific at Auburndale Bridge, near Corona, Ocean) near Cssmalia. Calif...... 503-505 Calif.,.,...,.,....,,.,,,,..,..,,.,....215-216 San Antonio Creek tributary near Casmalia, at Colton, Calif,,....,.,...... ,..,..,,..,,. 201 Calif,..,,,,,...,.,.,..,...,,.....,,,.., 506 at E Street, near San Bernardino, Calif.,,,176-178 San Antonio Creek basin, gaging-station at MWD Crossing, near Arlington, Calif,.,,,. 202 records in,,..,,,.,,...,,,.,..,,,...,,.503-506 at Riverside Narrows, near Arlington, San Antonio Creek (tributary to Ventura Calif,.,...... ,,,,. ,...,,,..,,...... ,.206-208 River) at Casitas Springs, Calif...... 426-428 at Santa Ana, Calif....,,,..,.,..,..,,.,..,263-265 San Antonio flood-control reservoir, at Waterman Avenue, at San Bernardino, Calif...,..,...,,,.,..,.,.,.,,.242-244,246-247 Calif,....,,,,,..,,...,..,,,...,.,.,,.,158-160 San Bernardino, Calif., Devil Canyon below Prado Dam, Calif...... 253-255 Creek near,,,.,.,.,,..,..,,...,.,,..,,,195-197 near Mentone, Calif..,,....,.,...,,.,,.,.,,131-136 Santa Ana River at.,,.,,.,.,...... ,.,...158-160 seepage investigation.,,,.,,..,,,....,...,.541-542 Santa Ana River near...,.,.,,,,,...,,,.,,..176-178 spreading diversion near Mentone, Calif....157-139 Warm Creek floodway at...... 173-175 Santa Ana River basin, crest-stage Warm Creek near.,,..,..,,.,,,..,.....,.,,.,. 179 partial-record stations in,,..,..,.,,.,. 538 San Clemente, Calif,, Cristianitos gaging-station records in,,.,,,,,,,,.,..,.,130-266 Creek near..,...,..,..,,,.,,,.,..,...,.109-110 schematic diagram showing diversions San Mateo Creek near...,..,.....,...... ,,..107-108 and storage in.,.,,,.,.,.,...,..,.,.,,.. 129 San Diego Creek near Irvine, Calif.,...,..,..126-128 Santa Anita Creek near Sierra Madre, San Diego River, at El Capitan Dam, Calif,..,.,,,....,..,.,....,..,,...... 346-348 Calif..,,.....,...,..,.,,..,..,,.,,,.... 39 Santa Barbara, Calif., Santa Ynez River near Santee, Calif...,.,....,,.,,.,,,,.,.,.. 40-42 near.,.,..,,,..,,.,.,...,,,...,...,459,460-462 San Diego River basin, crest-stage Santa Clara River, at Los Angeles- partial-record stations in...,,..,,..,., 537 Ventura County line, Calif.....,,.,,..,384-586 gaging-station records in.,,.,.....,,,,,.,., 38-42 at Montalvo, Calif.,.,,,..,,,...... ,..,,410-413 San Dieguito River, at Lake Hodges, Calif.,,.. 60 Santa Clara River basin, crest-stage near San Pasqual, Calif,,,.,...... ,.,...,., 59 partial-record stations In...... 539 San Dieguito River basin, crest-stage gaging-station records in..,,,.,,..,....., ,384-413 partial-record stations in.,,...,,.,,... 537 Santa Cruz Creek near Santa Ynez, Calif,..,,,466-468 gaging-station records in,,,,.,.,,...,..,... 46-60 Santa Fe flood-control reservoir, San Dimas Creek below San Dimas Dam, Calif..,280-282 Calif.,,,,.,,,.277-279,289-291,295-297,298-300 San Dimas flood-control reservoir, Santa Margarita River, at Ysldora, Calif,.,..,,.,,,.,..,,...,...... 280-282 Calif..,.,. .,,...,.....,,..,,.....,.....99-101 San Fernando, Calif,, Little Tujunga Creek near Fallbrook, Calif,,,,,...... 94-96 near,,,...,,....,,.,..,...,.....,,,....331-333 near Temecula, Calif..,.,...,,.,,..,...,,.., 91-93 Pacoima Creek near...,.....,,...,.,...... 319-321 Santa Margarita River basin, crest-stage San Gabriel flood-control reservoir, partial-record stations in....,.,....,.. 537 Calif...,,,273,277-279,289-291,295-297,298-300 gaging-station records in,.,,,.,..,,,.,.,,..84-101 San Gabriel River, above Whittier Narrows Santa Maria, Calif., Cuyama River near...... 508-510 Dam, Calif...,.,...,.,.,,,,...... ,,,,.289-291 Santa Maria Creek near Ramona, Calif,.,...,... 56-58 at Pico, Calif.,....,..,,...,.,...... 295-297 Santa Maria River at Guadalupe, Calif...... 535-536 at Spring Street, near Los Alamitos, Santa Maria River basin, crest-stage Calif.....,..,....,,,,.,,...... 298-300 partial-record stations in...,,...... ,.. 540 below Santa Fe Dam, near Baldwin Park, gaging-station records in...... ,....,..,,.507-536 Calif...... ,.277-279 Santa Paula Creek near Santa Paula, Calif...,406-408 East Fork, near Camp Bonita, Calif..,...,..267-269 Santa Ynez, Calif., Lake Cachuma near...... 469-470 near Azusa, Calif,.,.,,.,...... ,.,..,,. 273 Santa Agueda Creek near.,,.,...... ,..,474-476 West Fork, at Camp Rincon, Calif...... 270-272 Santa Cruz Creek near,,,..,.,..,...,,.,.,, ,466-468 San Gabriel River basin, crest-stage Santa Ynez River partial-record stations in...... 539 near,,...... 463-465,471-473 gaging-station records in...... 267-315 Santa Ynez River, above Gibraltar Dam, schematic diagram showing diversions near Santa Barbara, Calif.,,..,.,....,.. 459 and storage in..,,..,.,.,,.,.,,,..,,.,,, 266 at Cooper's Reef, near Lompoc, Calif...... 488-490 San Jacinto River, near Elsinore, Calif...... 228-230 at Jameson Lake, near Montecito, Calif....,457-458 near San Jacinto, Calif..,.,.,.....,,.,,,,.219-224 at narrows, near Lompoc, Calif,..,...,...,.494-496 South Fork, tributary near Valle Vista, at Pine Canyon, near Lompoc, Calif...... 500-502 Calif...... , 218 at Solvang, Calif...,.,....,,.....,,.....,.480-482 San Jose Creek (tributary to Pacific Ocean) at 13th Street, near Lompoc, Calif...... 497-499 near Goleta, Calif.,.,.,...,....,,.,..,448-450 below Gibraltar Dam, near Santa San Jose Creek (tributary to San Gabriel Barbara, Calif,...,,,...... ,....,...,.460-462 River) near El Monte, Calif...,..,.,.,.286-288 below Los Laureles Canyon, near Santa San Juan Capistrano, Calif., Arroyo Trabuco Ynez, Calif,,,,....,.....,.,.,...,.,,..463-465 near...,...,...,...,.,..,,,...... ,.,.,.119-121 near Buellton, Calif.,...... ,..,..,,.,..,,.485-487 San Juan Creek near...... 115-118 near Santa Ynez, Calif...... 471-475 Page age Terms and abbreviations, definition of...... 2-3 partial-record stations in...... 539 Tijuana River, near Dulzura, Calif...... 21-23 gaging-station records in...... 457-502 near Nestor, Calif...... 25 Santa Ysabel Creek, at Sutherland Dam, Tijuana River basin, crest-stage partial- Calif...... 46 record stations in...... 537 near Raroona, Calif...... 47-49 gaging-station records in...... 13-25 near San Pasqual, Calif...... 50-52 Topanga Creek near Toponga Beach, Calif...... 374-376 Santee, Calif., San Diego River near...... 40-42 Tujunga Creek, below Hanson Dam, Santiago Creek, at Modjeska, Calif...... 257-259 Calif...... 334-336 at Santa Ana, Calif...... 261-262 below Mill Creek, near Colby Ranch, at Santiago Dam, near Villa Park, Calif...... 260 Calif...... 325-327 Santiago Reservoir, Calif...... 260 near Sunland, Calif...... 328-330 Saticoy diversion near Saticoy, Calif...... 409 Twitchell Dam, Calif., Cuyama River Sawpit flood-control reservoir, below...... 517-519 Calif...... 350-352,353-355 Twitchell Reservoir, Calif...... 517-519,535-536 Seepage investigations: Santa Ana River ...... 541-542 Upland, Calif., Cucamonga Creek near...... 248-250 Sepulveda Dan, Calif., Los Angeles River at...... 316-318 Vail Dam, Calif., Temecula Creek at...... 87 Sepulveda flood-control reservoir, Vail Lake, Calif...... 87 Calif...... 316-318,337-339,343-345,368-370 Valle Vista, Calif., Bautista Creek Sespe Creek, near Fillmore, Calif...... 400-405 near...... 226 near Wheeler Springs, Calif...... 397-399 South Fork San Jacinto River tributary Sheehan ditch at Riverside Narrows, near near...... 218 Arlington, Calif...... 203-205 Ventura, Calif., Coyote Creek near...... 435 Sierra Madre, Calif., Santa Anita Creek Ventura River near...... 436-441 near...... 346-348 Ventura city diversion near Ventura, Sirat, Calif., Arroyo Simi near ...... 380-381 Calif...... 436-441 Sisquoc, Calif., Foxen Creek near...... 526-528 Ventura River, near Meiners Oaks, Calif...... 423-425 La Brea Creek near...... 523-525 near Ventura, Calif...... 436-441 Sisquoc River near...... 520-522 Ventura River basin, gaging-station Tepusquet Creek near...... 529-531 records in...... 414-441 Sisquoc River, near Garey, Calif...... 532-534 Villa Park, Calif., Santiago Creek near...... 260 near Sisquoc, Calif...... 520-522 Villa Park flood-control reservoir, Solvang, Calif., Alisal Creek near...... 477-479 Calif...... 261-262 Santa Ynez River at...... 480-482 Southern California Co.'s canal near Na Mcntone, Calif...... 131-136,273 Warin Creek floodway at San Bernardino, Southern California Edison Co.'s Lytle Creek conduit near Fontana, Calif...... 183-188 Warner Springs, Calif., Agua Caliente Southern California Edison Co.'s Sierra Creek near...... 61-63 conduit near Claremont, Calif...... 236-241 West Fork San Luis Rey River near ...... 64-66 Stage-discharge relation, definition of...... 3 Waterman Canyon Creek near Arrowhead Sunlami, Calif., Tujunga Creek near...... 328-330 Springs, Calif...... 170-172 Sutherland Ram, Calif., Santa Ysabel Wheeler Springs, Calif., Sespe Creek near. .. .397-399 Creek at...... 46 Whittier Narrows Dam, Calif., Mission Sutherland Reservoir, Calif...... 46 Creek below...... 359-361 Sweetwater River, at Loveland Dan, near Rio Hondo above ...... 350-352 Alpine, Calif...... 36 Rio Hondo below...... 362-364 at Sweetwater Dam, Calif...... 37 Rio Hondo flood-flow channel at ...... 292-294 diversion near Descanso, Calif...... 31-35 San Gabriel River above...... 289-291 near Descanso, Calif...... 31-35 Whittier Narrows flood-control reservoir, Sweetwater River basin, gaging-station Calif...... 295-297,362-364,365-367 records in...... 29-37 ek tributary near Dulzura, Calif.... 14 Work, division of. Temecula, Calif., Murrieta Creek at...... 88-90 scope of. Santa Margarita River near...... 91-93 WSP, definition of. Temecula Creek, at "ail Dam, Calif...... 87 near Aguanga, Calif...... 84-86 Ysidora, Calif., Santa Margarita River at.....99-101 Temescal Creek, at Corona, Calif...... 234-235 Yucaipa, Calif., Mill Creek near...... 140-145 near Corona Calif...... 231-233 Tepusquet Creek near Sisquoc, Calif...... 529-531 Zaca Creek near Buellton, Calif...... 483-484