UNITED STATES DEPARTMENT OF THE INTERIOR HAROLD L. ICKES, Secretary GEOLOGICAL SURVEY W. C. MENDENHALL, Director
Water-Supply Paper 861 SURFACE WATER SUPPLY of the UNITED S WES 1938 J I od - PART 11 * _ PACIFIC SLOPE BASINS IN CAI§FpRNIA
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UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON : 1939
For sale by the Superintendent of Documents, Washington, D. C. Price 40 cents (paper cover)
CONTENTS
Scope of work...... i Definition of terms...... i Explanation of data...... 1 Accuracy of field data and computed results...... 2 Publications...... 3 Records of discharge collected by agencies other than the Geological Survey...... 9 Cooperation...... 9 Division of work...... 10 Gaging-statlon records...... 11 Tia Juana River Basin...... 11 Cottonwood Creek at Morena Dam, Calif...... 11 Cottonwood Creek near Dulzura, Calif...... 11 Cottonwood Creek above Tecate Creek near Dulzura, Calif...... 12 Tia Juana River near Dulzura, Calif...... 13 Tia Juana River near Nestor, Calif...... 14 Campo Creek near Campo, Calif...... 15 Otay River Basin...... 16 Otay River at Savage Dam, Calif...... 16 Sweetwater River Basin...... 16 Sweetwater River at Sweetwater Dam, Calif...... 16 San Diego River Basin...... 17 San Diego River at El Cap!tan Dam, Calif...... 17 San Diego River near Santee, Calif...... 18 Boulder Creek at Cuyamaca Reservoir, near Julian, Calif...... 19 San Vicente Creek at Foster, Calif...... 20 San Dieguito River Basin...... 21 Santa Isabel Creek near Mesa Grande, Calif...... 21 San Dieguito River at Lake Hodges, Calif...... 22 San Luls Rey River Basin...... 22 San Luis Rey River at Lake Henshaw, near Mesa Grande, Calif...... 22 San Luis Rey River at Monserate Narrows, near Pala, Calif...... 23 San Luls Rey River near Bonsall, Calif...... 24 San Luis Rey River at Oceanside, Calif...... 25 Santa Margarita River Basin...... 26 Temecula Creek at Nigger Canyon, near Temecula, Calif...... 26 Temecula Creek at Railroad Canyon, near Temecula, Calif...... 27 Santa Margarita River near Fall Brook, Calif...... 28 Santa Margarita River at Ysidora, Calif...... 29 Murrieta Creek at Temecula, Calif...... 30 O'Neill ditch near Ysidora, Calif...... 31 San Juan Creek Basin...... 32 San Juan Creek near San Juan Capistrano, Calif...... 32 Trabuco Creek near San Juan Capistrano, Calif...... 33 Aliso Creek Basin...... 34 Aliso Creek at El Toro, Calif...... 34 Santa Ana River Basin...... 35 Santa Ana River near Mentone, Calif...... 35 Santa Ana River at Riverside Narrows, near Arlington, Calif...... 37 Santa Ana River at Hamner Avenue, near Corona, Calif...... 38 Santa Ana River at Auburndale Bridge, near Corona, Calif...... 39 Santa Ana River at Atchison, Topeka & Santa Fe Railway bridge near Prado, Calif.. 40 Santa Ana River near Prado, Calif...... 41 Santa Ana River at Santa Ana, Calif...... 42 Southern California Edison Co.'s canal and Greenspot pipe line near Mentone, Calif...... 43 Mill Creek near Craftonville, Calif...... 45 Mill Creek power canals 2 and 3 near Craftonville, Calif...... 47 Mill Creek power canal 1 near Craftonville, Calif...... 48 Plunge Creek near East Highlands, Calif...... 49 San Timoteo Creek near Redlands, Calif...... 50 Warm Creek near Colton, Calif...... 51 Strawberry Creek near Arrowhead Springs, Calif...... 53 Waterman Canyon Creek near Arrowhead Springs, Calif...... 54 City Creek near Highland, Calif...... 55 City Creek Water Co.'s canal near Highland, Calif...... 57 Devil Canyon Creek near San Bernardlno, Calif...... 58 Lytle Creek near Fontana, Calif...... 59 Fontana pipe line near Fontana, Calif...... 61 Lytle Creek (east channel) 'at San Bernardino, Calif...... 62 Lytle Creek (west channel) at Colton, Calif...... 63 Cajon Creek near Keenbrook, Calif....;...... 64 Lone Pine Creek near Keenbrook, Calif...... 65 Meeks & Daley canal near Colton, Calif...... 66 Day Creek near Etiwanda, Calif...... 67 Cucamonga Creek near Upland, Calif...... 68 San Jacinto River near San Jaclnto, Calif...... 69 San Jacinto River near Elsinore, Calif...... 70 Elslnore Lake at Elsinore, Calif...... 71 III iv CONTENTS
Gaglng-station records Continued. Page Santa Ana River Basin Continued. Temescal Creek near Corona, Calif...... 72 Chino Creek near Prado, Calif...... 73 San Antonio Creek near Claremont, Calif...... 74 Southern California Edison Co.'s canal near Claremont, Calif...... 76 Santiago Creek near Villa Park, Calif...... 77 Santiago Creek at Santa Ana, Calif...... 78 Irvine ranch drainage canal near Tustin, Calif...... 79 San Gabriel River Basin...... 80 San Gabriel River near Camp Bonita, Calif...... 80 San Gabriel River near Azusa, Calif...... 81 San Gabriel River at Pico, Calif...... 82 San Gabriel River at Spring Street, near Los Alamitos, Calif...... 84 West Fork of San Gabriel River at Camp Rincon, Calif...... 86 Rogers Creek near Azusa, Calif...... 87 Fish Creek near Duarte, Calif...... 88 Sawpit Creek near Monrovia, calif...... 89 Monrovia pipe line near Monrovia, Calif...... 90 San Dimas Creek near San Dimas, Calif...... 91 Dalton Creek near Glendora, Calif...... 92 San Jose Creek near Whittier, Calif...... 93 Brea creek at Fullerton, Calif...... 95 Carbon Creek at Olinda, Calif...... 96 Los Angeles River Basin...... 97 Los Angeles River at Los Angeles, calif...... 97 Los Angeles River near Downey, Calif...... 99 Los Angeles River at Long Beach, Calif...... 101 Pacoima Creek near San Fernando, Calif...... 103 Tujunga Creek near Colby ranch, Calif...... 105 Tujunga Creek near Sunland, Calif...... 107 Fox Creek near Colby ranch, Calif...... 109 Little Tujunga Creek near San Fernando, Calif...... 110 Haines Creek near Tujunga, Calif...... 112 Arroyo Seco near Pasadena, calif...... 113 Santa Anita Creek near Sierra Madre, Calif...... 114 Little Santa Anita Creek near Sierra Madre, Calif...... 115 Eaton Creek near Pasadena, Calif...... 116 Rio Hondo near Montebello, Calif...... 117 Rio Hondo near Downey, Calif...... 119 Rio Hondo Slough near Montebello, Calif...... 121 Ballona Creek Basin...... 123 Ballona Creek near Culver City, Calif...... 123 Topanga Creek Basin...... 125 Topanga Creek near Topanga Beach, Calif...... 125 Malibu Creek Basin...... 127 Malibu Creek at Crater Camp, near Calabasas, Calif...... 127 Santa Clara River Basin...... 129 Santa Clara River near Saugus, Calif...... 129 Piru Creek near Piru, Calif...... 131 Sespe Creek near Fillmore, Calif...... 132 Santa Paula Creek near Santa Paula, Calif...... 133 Ventura River Basin...... 134 Matilija Creek at Matlllja, Calif...... 134 Ventura River near Ventura, Calif...... 135 Coyote Creek near Ventura, Calif...... 136 Santa Ynez River Basin...... 137 Santa Ynez River at Juncal Reservoir, near Montecito, Calif...... 137 Santa Ynez River near Santa Barbara, Calif...... 137 Santa Ynez River below Gibraltar Dam, near Santa Barbara, Calif...... 138 Santa Ynez River neo.r Santa Ynez, Calif...... 139 Santa Ynez River at Solvang, Calif...... 140 Santa Ynez River near Lompoc, Calif...... 141 Santa Maria River Basin...... 142 Cuyama River near Santa Maria, calif...... 142 Huasna River near Santa Maria, Calif...... 143 Saltnas Kiver Basin...... 144 Salinas Risrer near Santa Margarita, Calif...... 144 Salinas River near Spreckels, Calif...... 145 San Antonio River at Pleyto, Calif...... 146 Arroyo Seco near Soledad, Calif...... 147 Pa.ja.ro River Basin...... 148 Uvas Creek near Morgan Hill, Calif...... 148 San Lorenzo River Basin...... 149 San Lorenzo River at Big Trees, Calif...... 149 San Francisquito Creek Basin...... 150 San Francisquito Creek at Stanford University, Calif...... 150 San Francisquito Creek at Palo Alto, Calif...... 151 Los Trances Creek at Stanford University, Calif...... 152 Los Trances canal near Stanford University, Calif...... 153 Lagunita canal at Stanford University, Calif...... 154 Stevens Creek Basin...... 155 Stevens Creek near Cupertino, Calif...... 155 Guadalupe Creek Basin...... 156 Guadalupe Creek at Guadalupe, Calif...... 156 Guadalupe Creek at San Jose, Calif...... 157 Alamitos Creek near Edenvale, calif...... 158 Los Gates Creek at Los Gates, Calif...... 159 Campbell Creek at Saratoga, Calif...... 160 Coyote Creek Basin...... 161 Coyote Creek near Madrone, Calif...... 161 Coyote Creek near Edenvale, Calif...... 162 CONTENTS V
Gaglng-statlon records Continued. Page Alameda Creek Basin...... 163 Alameda Creek near Nlles, Calif...... 163 Kern River Basin...... f ...... 164 Kern River near Kernvllie, Calif...... 164 Kern River near Bakersfleld, Calif...... 166 Kern River No. 3 canal near Kernvllle, Calif...... 167 Borel canal at Tllley Creek, Calif...... 168 South Fork of Kern River near Onyx, Calif...... 169 South Fork of Kern River at Isabella, Calif...... 170 Tulare Lake Basin...... 171 Tulare Lake In Kings County, Calif...... 171 Tule River near Portervllle, Calif...... 172 South Fork of Tule River near Success, Calif...... 173 Kaweah River near Three Rivers, Calif...... 174 North Fork of Kaweah River at Kaweah, Calif...... 175 Kings River above North Fork, Calif...... 176 Kings River at Piedra, Calif...... 177 North Fork of Kings River near Cliff Camp, Calif...... 178 North Fork of Kings River below Rancherla Creek, Calif...... 179 Dinkey Creek at mouth, Calif...... 180 Los Gatos Creek near Coallnga, Calif...... 181 San Joaquln River Basin...... 182 San Joaquln River and tributaries above Fresno River...... 182 San Joaquln River above Big Creek, Calif...... 182 San Joaquln River below Kerckhoff power house, Calif...... 183 San Joaquln River near Frlant, Calif...... 184 San Joaquln River near Newman, Calif...... 185 San Joaquln River near Vernalls, Calif...... 186 Florence Lake near Big Creek, Calif...... 187 South Fork of San Joaquln River near Florence Lake, Calif...... 188 Ward tunnel at Intake, Calif...... 189 Ward tunnel at outlet, Calif...... 190 Bear Creek near Vermilion Valley, Calif...... 191 Mono Creek near Vermilion Valley, Calif...... 192 Huntlngton Lake near Big Creek, Calif...... 193 Big Creek below Huntlngton Lake, Calif...... 194 Pitman Creek below Tamarack Creek, Calif...... 195 Shaver Lake near Big Creek,Calif...... 197 Huntlngton-Shaver conduit at outlet, Calif...... 198 Fine Gold Creek near Frlant, Calif...... 201 Fresno River Basin...... 202 Fresno River near Knowles, Calif...... 202 Chowchllla River Basin...... 203 Chowchllla River at Buchanan dam site, Calif...... 203 Merced River Basin...... 204 Merced River at Happy Isles Bridge, near Yosemlte, Calif...... 204 Merced River at Pohono Bridge, near Yosemlte, Calif...... 205 Merced River at Klttrldge, Calif...... 206 Lake McClure at Exchequer, Calif...... 207 Merced River at Exchequer, Calif...... 210 Merced River near Llvlngston, Calif...... 211 Tenaya Creek near Yosemlte, Calif...... 212 Orestlmba Creek Basin...... 214 Orestlmba Creek near Nencnan, Calif...... 214 Tuolumne River Basin...... 215 Hetch Hetchy Reservoir at Hetch Hetchy, Calif...... 215 Tuolumne River near Hetch Hetchy, Calif...... 216 Don Pedro Reservoir near La Grange, Calif...... 217 Tuolumne River above La Grange Dam, near La Grange, Calif...... 218 Falls Creek near Hetch Hetchy, Calif...... 219 Cherry Creek near Hetch Hetchy, Calif...... 220 Lake Eleanor near Hetch Hetchy, Calif...... 221 Eleanor Creek near Hetch Hetchy, Calif...... 222 South Fork of Tuolumne River near Oakland Recreation Camp, Calif...... 223 Middle Tuolumne River near Buck Meadows, Calif...... 224 Woods Creek near Jacksonville, Calif...... 225 Modesto canal near La Grange, Calif...... 226 Turlock canal near La Grange, Calif...... 227 Stanislaus River Basin...... 228 Middle Fork of Stanislaus River at Sand Bar Flat, near Avery, Calif...... 228 Melones Reservoir at Melones Dam, Calif...... 229 Stanislaus River below Melones power house, Calif...... 230 North Fork of Stanislaus River near Avery, Calif...... 231 South Fork of Stanislaus River near Long Barn, Calif...... 232 Tuolumne canal near Long Barn, Calif...... 233 South San Joaquln canal near Knights Ferry, Calif...... 234 Oakdale canal near Knights Ferry, Calif...... 235 Calaveras River Basin...... 236 Calaveras River at Jenny Llnd, Calif...... 236 Cosgrove Creek near Valley Springs, Calif...... 237 Mokeiumne River Basin...... 238 Salt Springs Reservoir near West Point, Calif...... 238 North Fork of Mokeiumne River below Salt Springs Dam, Calif...... 239 Mokeiumne River near Mokeiumne Hill, Calif...... 240 Mokeiumne River at Lancha Plana, Calif...... 241 Mokeiumne River near Clements, Calif...... 242 Mokeiumne River at Woodbrldge, Calif...... 243 Tiger Creek power-house conduit below Salt Springs Dam, Calif...... 244 Cold Creek near Mokeiumne Peak, Calif...... 245 VI CONTENTS
Gaging-station records Continued. San Joaquin River Basin Continued. Mokelumne River Basin Continued. Page Bear River at Pardoe Camp, Calif...... 246 Middle Fork of Mokelumne River at West Point, Calif...... 247 South Fork of Mokelumne River near West Point, Calif...... 248 Woodbridge canal at Woodbridge, Calif...... 249 Sutter Creek near Sutter Creek, Calif...... 250 North Fork of Cosumnes River near El Dorado, Calif...... 251 Cosumnes River at Michigan Bar, Calif...... 252 Goose Lake Basin...... 253 Brew Creek near Lakeview, Oreg...... 253 Cottonwood Creek near Lakeview, Oreg...... 255 Sacramento River Basin...... 256 Sacramento River main stem...... 256 Sacramento River at Antler, Calif...... 256 Sacramento River at Kennett, Calif...... 257 Sacramento River near Red Bluff, Calif...... 258 Sacramento River et Butte City, Calif...... 260 Sacramento River at Colusa, Calif...... 261 Sacramento River below Wilkins Slough, Calif...... 262 Sacramento River at Knights Landing, Calif...... 263 Sacramento River at Verona, Calif...... 264 Pit River Basin...... 265 Pit River near Canby, Calif...... 265 Pit River at Fall River Mills, Calif...... 266 Pit River below Pit No. 4 Bam, Calif...... 267 Pit River at Big Bend, Calif-...... 268 Pit River near Ydalpom, Calif...... 269 South Fork of Pit River near Likely, Calif...... 270 Hat Creek near Hat Creek, Calif...... 271 McCloud River near McCloud, Calif...... 272 McCloud River at Baird, Calif...... 273 Mill Creek Basin...... 27* Mill Creek near Los Molinos, Calif...... 274 Elder Creek Basin...... 275 Elder Creek near Henleyville, Calif...... 275 Thomas Creek Basin...... 276 Thomas Creek, at Paskenta, Calif...... 276 Deer Creek Basin...... 277 Beer Creek near Vina, Calif...... 277 Chlco Creek Basin...... 278 Chico Creek near Chico, Calif...... 278 Stony Creek Basin...... 279 Stony Creek above Stony Gorge Reservoir, Calif...... 279 Butte Creek Basin...... 280 Butte Creek near Chico, Calif...... 280 Feather River Basin...... 281 Lake Almanor near Prattville, Calif...... 281 North Fork of Feather River near Prattville, Calif...... 281 North Fork of Feather River at Big Bar, Calif...... 283 Feather River near Oroville, Calif...... 283 Feather River at Nicolaus, Calif...... 284 Indian Creek near Crescent Mills, Calif...... 285 Spanish Creek at Keddie, Calif...... 286 Bucks Creek storage- reservoir near Bucks ranch, Calif...... 287 Grizzly Creek near Storrie, Calif...... 288 West Branch of Feather River near Yankee Hill, Calif...... 289 Concow Creek near Yankee Hill, Calif...... 290 Spring Valley ditch near Yankee Hill, Calif...... 291 Middle Fork of Feather River near Clio, Calif...... 292 Middle Fork of Feather River at Bidwell Bar, Calif...... 293 South Fork of Feather River at Enterprise, Calif...... 294 Lost Creek near Clipper Mills, Calif...... 295 Forbestown ditch near Clipper Mills, Calif...... 296 Palermo canal at Enterprise, Calif...... 297 Middle Fork of Yuba River at Milton, Calif...... '...... 298 Middle Fork of Yuba River near North San Juan, Calif...... 299 Yuba River at Smartville, Calif...... 300 Milton-Bowman tunnel at outlet, Calif...... 301 Oregon Creek near North San Juan, Calif...... 302 North Fork of Yuba River near Sierra City, Calif...... 303 North Fork of Yuba River below Goodyears Bar, Calif...... 304 Bowman Lake near Graniteville, Calif...... 305 Canyon Creek below Bowman Lake, Calif...... 306 Bowman-Spaulding canal at intake, Calif...... 307 Deer Creek near Smartvilie, Calif...... 308 Bear River near Wheatland, Calif...... 309 Bear River canal near Coifax, Calif...... 310 American River Basin...... 311 North Fork of American River near Colfax, Calif...... 311 North Fork of American River at Rattlesnake Bridge, Calif...... 312 American River at Fair Oaks, Calif...... 312 American River at Sacramento, Calif...... 313 Middle Fork of American River near Auburn, Calif...... 314 South Fork of Ameri can River near Kyburz, Calif...... 315 South Fork of American River near Camino, Calif...... 316 South Fork of American River at Coloma, Calif...... 317 Echo Lake flume near Vade, Calif...... 316 Medley Lakes outlet near Vade, Calif...... 319 Silver Lake outlet near Kirkwood, Calif...... 320 CONTENTS VII
Gaging-station records Continued. Sacramento River Basin Continued. American River Basin Continued. Page Seepage from Silver Lake near Kirkwood, Calif...... 321 Silver Fork of south Fork of American River near Kyburz, Calif...... 322 Twin Lakes outlet near Kirkwood, Calif...... 323 El Dorado canal near Kyburz, Calif...... 324 Alder Creek near Whitehall, Calif...... 325 Plum Creek near Riverton, Calif...... 326 Silver Creek at Union Valley, Calif...... 327 Silver Creek near Placerville, Calif...... 328 South Fork of Silver Creek near Ice House, Calif...... 329 Finnon Reservoir outlet near Placerville, Calif...... 330 American River flume near Camino, Calif...... 331 Cache Creek Basin...... 332 Clear Lake at Lakeport, Calif...... 332 Cache Creek at Yolo, Calif...... 333 North Fork of Cache Creek near Lower Lake, Calif...... 334 Putah Creek Basin...... 335 Putah Creek near Guenoc, Calif...... 335 Putah Creek near Winters, Calif...... 336 Napa River Basin...... 337 Conn Creek near St. Helena, Calif...... 337 Eel River Basin...... 338 Lake Pillsbury at Hullville, Calif...... 338 Eel River at Hullville, Calif...... 339 Eel River at Van Arsdale Dam, near Potter valley, Calif...... 340 Eel River at Scotia, Calif...... 341 Potter Valley power-house tailrace near Potter Valley, Calif...... 342 Klamath River Basin...... 343 Williamson River below Sprague River, near Chiloquin, Oreg...... 343 Upper Klamath Lake near Klamath Falls, Oreg...... 344 Link River at Klamath Falls, Oreg...... 345 Klamath River at Keno, Oreg...... 346 Klamath River below Fall Creek, near Copco, Calif...... 347 Klamath River at Somesbar, Calif...... 348 Sprague River near Chiloquin, Oreg...... 349 Fourmile Lake Reservoir near Odessa, Oreg...... 350 Cascade canal near Fish Lake, Oreg...... 351 "A" canal at Klamath Falls, Oreg...... 352 Keno canal at Klamath Falls, Oreg...... 353 Lost River diversion canal near Olene, Oreg...... 354 Diversion from Klamath River to Lost River near Olene, Oreg...... 355 Fall Creek at Copco, Calif...... 356 Hyatt Prairie Reservoir near Ashland, Oreg...... 357 Keene Creek canal near Ashland, Oreg...... 358 Shasta River near Yreka, Calif...... 359 Salmon River at Somesbar, Calif...... 360 Trinity River at Lewiston, Calif...... 361 Trinity River near Burnt Ranch, Calif...... 362 Trinity River near Hoopa, Calif...... 363 Smith River Basin...... 364 Smith River near Crescent City, Calif...... 364 Miscellaneous discharge measurements...... 365 Index...... 369
ILLUSTRATION
Plate 1. Typical river-measurement stations
SURFACE WATER SUPPLY OF PACIFIC SLOPE BASINS IN CALIFORNIA, 1938
SCOPE OF WORK
This volume is one of a series of 14 reports presenting results of measurements of stage and flow made on streams, lakes, and reservoirs in the United States during the water year ending September 30, 1938. The work was begun in 1888 in connection with special studies relating to irrigation. Measurements of stream flow have been made at about 7,800 points in the United States and also at many points in Alaska and the Hawaiian Islands. In July 1938, 3,830 gaging stations were being maintained by the Geological Survey and cooperating organizations. Many miscellaneous discharge measurements were made at other points. In the execution of the work many State and private organizations have cooperated, either by furnishing data or by assisting in collecting data. Acknowledgments for cooper ation of the first kind are made in connection with the description of each station affected; cooperation of the second kind is acknowledged on page 9.
DEFINITION OF TERMS
The units in which stream-flow data are presented in this report and other terms used herein are defined as follows: "Second-feet" is an abbreviation for "cubic feet per second." A second-foot is the rate of discharge of water flowing in a channel when the cross-sectional area is 1 square foot and the average velocity is 1 foot per second. "Second-feet per square mile" is the average number of cubic feet of water flowing per second from each square mile of area drained, on the assumption that the run-off is dis tributed uniformly both as regards time and area. "Run-off in inches" is the depth to which an area would be covered if all the water flowing from it in a given period were uniformly distributed on its surface. It is used for comparing run-off with rainfall, which is usually expressed in inches. An "acre-foot", equivalent to 43,560 cubic feet, is the quantity of water required to cover an acre to the depth of 1 foot. The term is commonly used in connection with stor age for irrigation. "Second-foot-day" is the volume of water represented by a flow of 1 second-foot for 24 hours. It is equivalent to 86,400 cubic feet, 1.983471 acre-feet, or 646,317 gallons and represents a run-off of 0.0372 inches from one square mile. "Stage-discharge relation" is an abbreviation for the term "relation of gage height to discharge." "Control" is a term used to designate the natural section or reach of the channel or artificial structure below the gige which determines the stage-discharge relation at the
EXPLANATION OF DATA
The base data collected at giging stations consist of records of stage, measurements of discharge, and general information used to supplement the gage heights and discharge 1 2 EXPLANATION OF DATA
measurements in determining the daily flow. The records of stage are obtained either from direct readings on a nonrecording gage or from a water-stage recorder that gives a con tinuous record of the fluctuations. Measurements of discharge are made with a current meter by the general methods outlined in standard textbooks on the measurement of river discharge. Typical gaging stations, equipped with water-stage recorder and measuring cable and car, are shown on plate 1. Rating tables giving the discharge for any stage are prepared from the discharge measurements. The application of the daily gage height to these rating tables gives the daily discharge, from which the monthly and yearly mean discharge are computed. The data presented for each gaging station in the area covered by this report usually comprise a description of the station, a table showing the daily discharge of the stream, and a table of monthly and yearly discharge and run-off. Skeleton rating tables are pub lished except for those stations whose daily discharge for the greater part of the year was determined by the shifting-control method, the slope method, or other special methods. The description of the station gives the type of gage, its latitude and longitude de termined from the best available maps, and information ir regard to diversions that decrease the flow at the gage, artificial regulation from pondage or storage, and the accuracy of the records. Under "Average discharge" is given the average discharge for the number of years indicated. It is given only for stations for which there are 10 or more complete years of record. Information under "Extremes" gives the maximum discharge and gage height; the minimum discharge if there is little or no regulation; the minimum daily discharge if there is extensive regulation, and also the minimum discharge if use ful; and the minimum gage height except when it is of no importance. Unless otherwise qualified, the maximum discharge corresponds to the crest s,tage, obtained by use of a water-stage recorder or a nonrecording gage read at the time of the crest. Likewise the minimum represents the lowest discharge, unless otherwise qualified. The peak discharge for the year with the time of its occurrence is given below the table of monthly discharge for sone stations. Selected lower peaks are also given if the peak discharge exceeded the mean discharge for that day by more than 10 percent. This supplementary information is generally not given for stations having drainage areas of less than 10 square miles or more than 10,000 square miles. The table of daily discharge gives, for stations equipped with nonrecording gages, the discharge in second-feet corresponding to once-daily or the mean of twice-daily readings of the gage. For flashy floods the mean daily discharge is determined from gage-height graphs based on gage readings made once or twice daily or oftener, as stated in the sta tion description. For stations epuipped with water-stage recorders the table gives the discharge corresponding to the mean daily gage height except for stations on streams sub ject to sudden or rapid fluctuation. For stations subject to such fluctuation the mean daily gage height may not indicate the true mean daily discharge, which must be obtained by averaging the discharge for intervals of the day or by using the discharge integrator, an instrument for obtaining the mean daily discharge from a continuous gage-height graph and containing as an essential element the rating curve of the station. In the table of monthly discharge the column headed "Second-foot-days" gives the sum for each month of the figures for that month given in the table of daily discharge. The column headed "Maximum" gives the maximum daily discharge and not the discharge when the water surface was at crest height. Likewise, in the column headed "Minimum" the quantity GEOLOGICAL SURVEY WATER-SUPPLY PAPER 861 PLATE 1
A. ARTIFICIAL CONTROL, RECORDER HOUSE, AND MEASURING CABLE ON OLEN- TANGY RIVER, DELAWARE, OHIO.
B. RECORDER HOUSE AND MEASURING CABLE ON KAWEAH RIVER, THREE RIVERS. CALIF. TYPICAL RIVER-MEASUREMENT STATIONS.
PUBLICATIONS 3 given Is the minimum daily discharge. The column headed "Mean" is the average flow in cubic feet per second during the month.
ACCURACY OF FIELD DATA AND COMPUTED RESULTS
The accuracy of stream-flow data depends primarily (1) on the permanency of the stage- discharge relation and (2) on the accuracy of observation of stage, measurements of flow, and Interpretation of records. The station description gives a statement in regard to the general accuracy of the records. "Excellent" indicates that, in general, the daily records are accurate within 5 percent; "good", within 10 percent; "fair", within 15 percent; and "poor", within 20 percent or more. The monthly means for any station may represent with high accuracy the quantity of water flowing past the gage, but the figures showing discharge per square mile and depth in inches may be subject to gross errors caused by the inclusion of large noncontributing districts in the measured drainage area, by lack of information concerning water diverted for irrigation or other use, or by inability to interpret the effect of artificial regu lation of the flow of the river above the station. "Second-feet per square mile" and "run-off in inches" are therefore not computed if such errors appear probable. The com putations are also omitted for stations on streams draining areas in which the annual rainfall is less than 20 inches. Many gaging, stations on streams in the irrigated areas of the United States are situ ated above most of the diversions from those streams, so that the discharge recorded does not show the water supply available for further development, as prior appropriations below the station must first be satisfied. The table of monthly discharge gives a general idea of the flow at the station. The table of dally discharge allows more detailed studies of the variation in flow. It should tee borne in mind, however, that the observations in each succeeding year may be expected to throw new light on data previously published, and that greater degrees of refinement in computations and records may be warranted with increased data and use of improved equipment.
PUBLICATIONS
The results of stream-flow measurements are now published annually in 14 parts, each part covering an area whose boundaries coincide with natural drainage features as Indi cated below: Part 1. North Atlantic slope basins (St. John River to York River). 2. South Atlantic slope and eastern Gulf of Mexico basins (James River to Mississippi River). 3. Ohio River Basin. 4. St. Lawrence River Basin. 5. Hudson Bay and upper Mississippi River basins. 6. Missouri River Basin. 7. Lower Mississippi River Basin. 8. Western Gulf of Mexico baslna. 9. Colorado River Basin. 10. The Great Basin. 11. Pacific slope basins in California. 12. Pacific slope basins In Washington and upper Columbia River Basin. 13. Snake River Basin. 14. Pacific slope basins in Oregon and lower Columbia River Basin. 4 PUBLICATIONS
Water-supply papers and other publications of the Geological Survey containing data in regard to the water resources of the United States may be obtained or consulted as explained below. 1. Copies may be purchased at nominal cost from the Superintendent of Documents, Government Printing Office, Washington, D. C., who will, on application, furnish lists giving prices. 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 local offices of the water-resources branch of the Geological Survey as follows: Augusta, Maine, Statehouse. Boston, Mass., 945 Post Office Building. Hartford, Conn., 203 Federal Building. Albany, N. Y., 526 Federal Building. Trenton, N. J., 228 Federal Building. Harrisburg, Pa., 490 Education Building. Charlottesville, Va., University of Virginia. South Charleston, W. Va., Naval Ordnance Plant. Asheville, N. C., 220 Post Office Building. Columbia, S. C., 119 United States Courthouse. Atlanta, Ga., Georgia School of Technology. Ocala, Fla., Post Office Building. Montgomery, Ala., 507 Post Office Building. Chattanooga, Term., 442 Post Office Bull-ding. Louisville, Ky., 641 Federal Building. Columbus, Ohio, 404 Engineering Experiment Station, Ohio State University. Indianapolis, Ind., 316 Federal Building. Urbana, 111., 14 Post Office Annex. Madison, Wls., 337 N. State Capitol. St. Paul, Minn., 808 New Post Office Building. Iowa City, Iowa, 402 Hydraulic Laboratory, University of Iowa. St. Louis, Mo., 906 Customhouse, 1114 Market Street. Rolla, Mo., Missouri Geological Survey Building, Missouri School of Mines and Metallurgy. Topeka, Kans., 305 Federal Building. Fort Smith, Ark., 6 Post Office Building. Austin, Tex., State Highway Building. Santa Fe, N. Mex., 3 United States Courthouse. Tucsdn, Ariz., 210 Post Office Building. Denver, Colo., 230 Customhouse. Salt Lake City, Utah, 303 Federal Building. Idaho Falls, Idaho, 204 Federal Building. Boise, Idaho, 429 Federal Building. Helena, Mont., 412 Federal Building. Tacoma, Wash., 406 Federal Building. Portland, Oreg., 606 Post Office Building. San Francisco, Calif., 208 Federal Office Building. Los Angeles, Calif., G-31 Post Office and Courthouse. Honolulu, Hawaii, 225 Federal Building. A list of the Geological Survey publications may be obtained by applying to the Director, Geological Survey, Washington, D. C. Records of flow of streams in the United States have been published in the reports tabulated as follows:
Stream-flow data in reports of the Geological Survey (A - Annual Report; B = Bulletin; W = Water-Supply Paper)
Report Character of data Year
10th A, pt. 2 Descriptive information only. llth A, pt. 2 Monthly discharge and descriptive information..... 1884 to Sept. 1890. 1884 to June 30, 1891. 13th A, pt. 3 1884 to Dec. 31, 1892. 14th A, pt. 2 Monthly discharge (long-time records, 1871-93).... 1888 to Dec. 31, 1893. B 131...... 1893-94. ratings. 16th A, pt. 2 Descriptive information only. B 140...... 1895. and monthly discharge (also many data covering earlier years). W 11...... 1896. 18th A, pt. 4 Descriptions, measurements, ratings, and monthly 1895-96 . discharge (also similar data for some earlier years ) . PUBLICATIONS
Stream-flow data in reports of the Geological Survey Continued
Report Character of data Year
Descriptions, measurements, and gage heights, 1897. eastern United States, eastern Mississippi River, and Missouri River above Junction with Kansas River. Descriptions, measurements, and gage heights, 1897. western Mississippi River below junction of Missouri and Platte Rivers, and western United States. 19th A, pt. 4 Descriptions, measurements, ratings, and monthly 1897. discharge (also some long-time records). W 27...... Measurements, ratings, and gage heights, eastern 1898. United States, eastern Mississippi River, and Missouri River. W 28. Measurements, ratings, and gage heights, Arkansas 1898. River and western United States. 20th A, pt. 4 Monthly discharge (also for many earlier years)... 1898. W 35 to 39... Descriptions, measurements, gage heights, and 1899. ratings. 21st A, pt. 4 Monthly discharge...... 1899. W 47 to 52... Descriptions, measurements, gage heights, and 1900. ratings. 22d A, pt. 4. Monthly discharge...... 1900. W 65, 66..... Descriptions, measurements, gage heights, and 1901. ratings. Monthly discharge...... 1901. Note.- The reports that contain records after 1901 are given in the table on page 6.
The table on the following page gives, by years and drainage basins, the numbers of the papers on surface water supply published from 1899 to 1938. The data for any par ticular station will, in general, be found in the reports covering the years during which the station was maintained. For example, the data from 1910 to 1920 for any station in the area covered by part 3 are published in Water-Supply Papers 283, 303, 323, 353, 403, 433, 453, 473, and 503, which contain records for the Ohio River Basin for those years. The records at most of the stations discussed in these reports extend over a series of years. Miscellaneous measurements at many points other than regular gaging stations have been made each year and are published under "Miscellaneous discharge measurements" at the end of each report, the streams and points of measurement listed appearing in the same relative order as the streams and gaging stations in the body of the report. An index of the records obtained prior to 1904 has been published in Water-Supply Paper 119. PUBLICATIONS
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OHO O HHC1 ^£>3 £1 > d.H'd'S'fl fflS J > rfflfflrl -HfigKC+a^^oC EH(K . . . .' f, J ffl ffl S^J >^ OCSEt s O> O r-IOJ tO HOJ tO *# LO H OJ tO-^h lO to c- co ooooo O O OOO H H H H i- sasss ^ OJOJ CM 03 OJOJ OJOJ 10 to to to rt to to to to PUBLICATIONS From time to time reports have been published that are compilations of records for various areas, usually a single State or drainage basin. These reports contain records previously published (some of which have been revised), as well as some records not con tained In the annual series of water-supply papers. The following table gives the numbers and titles of these reports, arranged In alphabetical order by States and drain age basins. Reports containing compilation of discharge by States and drainage basins Water-Supply Year Paper ending State or drainage basin and title STATE 107 1903 Alabama, Water powers of, with an appendix on stream measurements In Mississippi . 298 1912 California, Water resources of, part 1, Stream measurements In Sacramento River Basin. 299 1912 California, Water resources of, part 2, Stream measurements in San Joaquln River Basin. 300 1912 California, Water resources of, part 3, Stream measurements in the Great Basin and Pacific coast river basins. 447 1918 California, Surface water supply of the southern Pacific slope of. 597e 1927 California, Surface water supply of Sacramento River Basin. 636d 1927 California, Surface water supply of San Joaquin River Basin. 636e 1927 California, Surface water supply of Pacific slope basins In. 637a 1927 California, Surface water supply of minor San Francisco Bay, northern Pacific, and Great basins In. 74 1900 Colorado, Water resources of. 197 1905 Georgia, Water resources of. 415 1915 Massachusetts, Surface waters of. 230 1906 Nebraska, Surfa'ce water supply of. 370 1910 Oregon, Surface water supply of. 850 1937 Texas, Summary of records of surface waters of. 424 1916 Vermont, Surface waters of. 492 1919 Washington, Summary of hydrometrlc data In. 469 1921 Wyoming, Surface waters of, and their utilization. DRAINAGE BASIN 395 1914 Colorado River (Colo., Utah, etc.) and its utilization, 1916. 617 1927 Colorado River, upper (Colo., Utah), and Its utilization, 1929. 517 1920 Great Salt Lake Basin, Water powers of, 1924. 618 1926 Green River (Wyo., Utah) and Its utilization, 1930. 198 1906 Kennebec River Basin (Maine), Water resources of, 1907. Milk River. (See St. Mary and Milk Rivers.) 536 1920 New-Kanawha River Basin (W. Va., Va., N. C.), Surface water supply of, 1925. 279 1909 Penobscot River Basin (Maine), Water resources of, 1912. 192 1906 Potomac River Basin (W. Va., Va., Md.. etc.), 1907. 358 1913 Rio Grande Basin (N. Mex., Tex., etc.), Water resources of, 1888-1913. 491 1917 St. Mary and Milk Rivers (Mont, and Canada), Water supply of, 1920. 109 1904 Susquehanna River Basin (Pa., Md.), Hydrography of, 1905. In addition to the records noted above, records of discharge have been published In State reports. Some of these are not contained in the publications gf the Geological Survey or are revisions of records previously published In Its water-supply papers. The following table contains a list of these reports. State reports containing compilation of records of discharge State Year Report Issued by ending Alabama .... 1915 Bull. 17, i Water powers of Alabama..... Geological Survey of Alabama. Georgia. . . . 1920 Bull. 38, Water powers of Georgia..... Geological Survey of Georgia. Illinois... 1911 Indiana.... 1927 Pub. 72, Surface water supply of Department of Conservation. Indiana. a!930 Indiana. ,1932 °1919 Do ...... C1924 ...... do...... Do. PUBLICATIONS State reports containing compilation of records of discharge Continued Year Report Issued by ending Kansas..... Surface waters of Kansas. Kansas State Board of Agriculture. Do...... 31935 Stream-flow data of Kansas...... Do. Kentucky... 1920 Surface waters of Kentucky...... Kentucky Geological Survey. Minnesota.. 1912 Water resources investigation of State Drainage Commission. Minnesota. Missouri... 1926 Reports of Bureau of Geology and Missouri Bureau of Geology Mines, vol. 20, 2d series, Water and Mines. Resources of Missouri. Nebraska... 1914 1st hydrographic report...... Bureau of Water Power, Irri gation and Drainage. Do...... f!928 2d hydrographic report...... Do. New Jersey. 1928 Bull. 33, Surface water supply of Department of Conservation New Jersey. and Development. Do. ^1934 Special Report 5, Surface water supply State Water Policy Commis of New Jersey. sion. New Mexico. 1925 Surface water supply of New Mexico.... Office of the State Engineer. North Caro 1923 Bull. 34, Discharge records of North Department of Conservation lina. Carolina streams. and Development. Do...... h!936 Bull. 39, Discharge records of North Do. Carolina streams. Oregon..... 1914 Bull. 4, Water resources of the State Office of the State Engineer. of Oregon. Do...... 1 1924 Bull. 7, Water resources of the State Do. of Oregon. Do...... ^ 1930 Bull. 8, Water resources of the State Do. of Oregon. Do...... k!936 Bull. 9, Water resources of the State Do. of Oregon, Pennsylvania 1911 Report of Water Supply Commission of Water Supply Commission of Pennsylvania. Pennsylvania. Do...... 11932 Stream-flow records of Pennsylvania... Department of Forests and Waters. Tennessee.. 1924 Bull. 34, Water resources of Department of Education. Tennessee. m!930 Bull. 40, Surface waters of Tennessee. Do. 1905 5th Biennial Report, State Engineer... Office of the State Engineer. 1927 Bull. 31, Water resources of Virginia. Conservation and Development Commission. Washington. 1933 Bull. 5, Monthly and yearly summaries Department of Conservation of hydrometric data. and Development. Wisconsin.. 1914 1st report of Railroad Commission of Railroad Commission of Wisconsin to Legislature on water Wisconsin. powers. Do. n!923 2d report of Railroad Commission of Do. Wisconsin to Legislature on water powers. a Includes records for the years 1927-30. I Includes records for the years 1914-24. b Includes records for the years 1895-1919. J Includes records for the years 1924-30. c Includes records for the years 1919-24. k Includes records for the years 1930-36. d Includes records for the years 1924-28. 1 Includes records for the years 1928-32. e Includes records for the years 1928-35. m Includes average weekly discharge for f Includes records for the years 1914-28. the years 1920-30. g Includes records for the years 1928-34. n Includes records for the years 1914-23. h Includes records for the years 1889-1936; records of daily and monthly discharge are not Included. Note.- In addition to the records contained in the reports listed above, the following States have issued annual or biennial reports in which are contained records of discharge: California, Colorado, Idaho, Indiana, Missouri, Montana, Nebraska, New Mexico, New York (also New York City Board of Water Supply), North Dakota, Oregon, Pennsylvania, Utah, Washington, and Wyoming. Flood reports In addition to the compilation of records of discharge as presented in this volume, the Geological Survey from time to time investigates outstanding floods and publishes special reports, in which are included records of hourly and daily discharge at gaging stations. Two such reports are being concurrently prepared covering streams within Part 11 as follows: Water-Supply Paper 843 The floods of December 1937 in northern California. Water-Supply Paper 844 The floods of March 1938 in southern California. COOPERATION 9 RECORDS OF DISCHARGE COLLECTED BY AGENCIES OTHER THAN THE GEOLOGICAL SURVEY The following table contains a list of gaging stations for the area covered by this report at which, records of daily discharge were collected during the year ending September 30, 1938, by agencies other than the Geological Survey. The records for these stations are not contained in publications of the Geological Survey. Records of daily discharge collected by agencies other than the Geological Survey River Location Period Alhambra Wash...... Short Street, Wilmar, Calif...... «1929-38 Browns Canyon Creek...... Devonshire Avenue, near Chatsworth, Calif ...... *1928-32, 1935-38 Clear Lake reservoir (eleva Sec. 8, T. 47 N. , R. 8 E., in California, near tl910-24, tion and discharge). Langell Valley, Oreg. 1924-38 Devils Canyon Creek...... 3 miles above San Gabriel Dam No. 2, Calif ...... »1933-38 Dume ( Zuma) Creek...... Roosevelt Highway bridge, Calif...... »1930-38 Eaton Hash...... Sunset Avenue, near El Monte, Calif...... »1930-38 Gerber Reservoir (elevation Sec. 12, T. 39 S., R. 13 E. , near Lorella, Oreg.... t!926-38 and discharge). E., Oreg. Little Santa Anita Creek..... 270 feet below flood-control dam at Sierra Madre, «1929-38 Calif. 31, 32, T. 39 S., R. 10 E., near Olene, Oreg. sees. 7, 8, 17, 18, T. 41 S., R. 11 E., near Merrill, Oreg. Calif . Monrovia Storm Drain...... Peck Road, Monrovia, Calif...... *1932-38 Montebello Storm Drain...... Mines Avenue, Montebello, Calif...... «1932-38 Facoiraa Wash...... Farthenia Street, near Van Nuys, Calif ...... *1928-38 Puddingstone Creek...... Below flood-control dam, near San Dimes, Calif..... «1927-38 Rubio Wash...... Glendon Way, near San Gabriel, Calif...... «1928-38 San Antonio Creek...... Mouth of _ canyon, near Claremont, Calif...... »1931-38 Do...... Florence Street, ft near Santa Pe Springs, Calif.... «1934-38 Creek, near Arcadia, Calif. Tujunga Creek...... Below flood-control dam, near Sunland, Calif...... »1932-3B Tujunga Wash...... Stonehurst Avenue, near San Fernando, Calif ...... «1932-38 channels) . Verdugo Storm Drain...... Don Carlos Avenue, Glendale, Calif...... '...... »1928-37 Do...... Estelle Avenue, Glendale, Calif...... »1936-38 West Pork of San Gabriel i mile below flood-control dam No. 2, Calif ...... «1934-38 River. *Station operated by Los Angeles County Flood Control District. tStation operated by Bureau of Reclamation. ^Station operated by Corps of Engineers, XT. S. Army. Formerly known as "above Pacific Electric Railway bridge near Artesia, Calif." ttFormerly known as "Telegraph Road." Mote.- The Soil Conservation Service began in 1938 to make studies of run-off from five areaa of less than 350 acres each in the vicinity of Santa Paula, Calif., and four areas of less than 40 acres each in the vicinity of Watsonville, Calif. The records are in the files of that organization COOPERATION In California the work was done under cooperative agreement with the State Department of Public Works, Earl Lee Kelly, director, and Edward Hyatt, State engineer. Work was also done under cooperative agreements with the East Bay Municipal Utility District; Stanford University; Santa Clara Valley Water Conservation District; San Bernardino, Riverside, Orange, Los Angeles, and Ventura Counties; and the cities of San Diego, Santa 10 DIVISION OF WORK Barbara, San Luls Oblspo, and Santa Cruz. In Oregon the work was done under cooperative agreement with the State of Oregon, Chas. E. Stricklln, State engineer. The entire expense of the stream-flow investigations In the Tuolumne River Basin for the Hetch Hetchy project and for Alameda Creek near Niles was paid by the city and county of San Francisco. Assistance In collecting records was also rendered by the United States Forest Ser vice, National Park Service, and the following organizations: In California, by the Southern California Edison Co., Ltd., San Joaquln Light & Power Corporation, Pacific Gas & Electric Co., City of Sacramento, Merced Irrigation District, Emma Rose & Hobart Estate Co., Thermalito and Table Mountain Irrigation Districts, all permittees and licensees of the Federal Power Commission; in Oregon by The California Oregon Power Co. Funds for construction, repairs, and improvement of gaging stations were allocated to the Geological Survey by the Federal Emergency Administration of Public Works. DIVISION OF WORK The data for stations In California (except the stations on Fall Creek and Klamath River near Copco) were collected and prepared for publication under the supervision of H. D. McGlashan, district engineer; In Oregon (also stations In California on Fall Creek and Klamath River near Copco), under supervision of G. H. Canfleld, district engineer. The work In Oregon was done in collaboration with Charles E. Strlcklin, State engineer. GAGING-STATION RECORDS 11 TIA JUANA RIVER BASIN Cottonwood Creek at Morena Dam, Calif. Location.- Lat. 32°41'00", long. 116°32<55", in SWi sec. 14, T. 17 s., R. 4 E., If miles upstream from Junction with Hauser Creek, at Morena Dam. Altitude, top of spillway gates, 3,045 feet, bed of stream, 2,882 feet. Drainage area.- 120 square miles. Records available.- January 1916 and October 1936 to September 1938. Remarks.- Records of discharge represent flow Into Morena Reservoir, computed on basis of records of storage, release, leakage, spill, evaporation, and rainfall. Records furnished by city of San Diego. Monthly discharge, water year October 1937 to September 1938 Mean Run-off in Month (second-feet) acre-feet 839 2 960 24V 1 990 801 September ...... 0 0 Water year 1937-38.. 37.4 27,050 Cottonwood Creek near Dulzura, Calif. Location.- Lat. 32°40'45", long. 116°40'20", in NWi sec. 22, T. 17 S., R. 3 E., at Barrett dam, about one mile downstream from junction with Pine Valley Creek and about 17 miles northeast of Dulzura. Altitude, top of flash gates, 1,615 feet, bed of stream, 1,446 feet. Drainage area.- 250 square miles. Records available.- January 1906 to December 1915 and October 1936 to September 1938. Remarks.- Regulation at Morena Reservoir, about 9 miles upstream. Records of discharge represent flow into Barrett Reservoir (capacity, 42,796 acre-feet) computed on basis of records of storage, release, leakage, spill, evaporation, and rainfall. Records furnished by city of San Diego. Monthly discharge, water year October 1937 to September 193S Month Mean Run-off In (second-feet) acre-feet 253 4 £0 858 0 0 Water year 1937-38.. 36.2 26,240 12 TIA JUANA RIVER BASIN Cottonwood Creek above Tecate Creek, near Dulzura, Calif. Location.- Water-stage recorder, lat. 32°34'10", long. 116°45'40", in sec. 27, T. 18 S. R. 2 E., half a mile upstream from confluence with Tecate Creek and 5i miles south of Dulzura. Drainage area.- 316 square miles. Records available.- October 1936 to September 1938. Extremes.- Maximum discharge during year, 2,360 second-feet Mar. 3 (gage height, 9.07 feet), from rating curve extended above 540 second-feet; no flow for several months. 1936-38: Maximum discharge, 2,780 second-feet Feb. 7, 1937 (gage height, 9.65 feet); no flow during part of each year. Remarks.- Records good. Regulation at Barrett and Morena Reservoirs, 10 and 18 miles, respectively, above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oet. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0.3 0.5 3.5 120 92 7.5 1.0 2 0 .5 .5 5 281 82 7.5 .9 3 0 .5 .5 2.5 1,460 78 8 .8 4 0 .5 .6 3.9 1,040 79 6 .6 5 0 .4 .6 3.5 631 75 5.5 .7 6 0 .3 .6 2.3 427 67 4.8 .6 7 0 .3 .5 2.1 326 63 3.9 .6 8 0 .3 .5 1.9 298 59 3.5 .7 9 0 .3 .4 2.5 283 51 3.2 .7 10 0 .4 .4 5 238 42 2.8 .8 11 0 .5 .4 6 219 41 2.5 .9 12 0 2.5 .4 20 497 37 2.1 1.0 13 0 1.4 .4 10 606 41 2.3 .9 14 0 .8 .4 7 517 37 2.3 .9 16 0 .6 2.3 6 397 25 2.3 .8 16 0 .6 1.7 5.5 328 19 3.5 .7 17 0 .5 .9 4.8 292 13 4.5 .6 18 0 .5 .8 3.9 259 10 4.8 .6 19 0 .4 1.2 6 219 8 5.5 .6 20 0 .4 5 5 192 7.5 5 .6 oooooooooooooo 21 0 .3 2.8 3.5 167 7.5 4.5 .6 22 0 .4 1.4 3.2 144 6.5 3.5 .5 23 0 1.0 .9 3.0 135 6.5 2.8 .5 24 0 2.1 .7 2.8 128 6 2.3 .5 25 .1 1.2 .6 2.5 121 7 1.9 .5 26 3 .9 .6 2.3 121 7.5 1.7 .4 27 3 .8 .5 22 121 6 1.7 .3 28 2 .7 .5 47 116 5 1.4 .3 29 3 .6 1.0 114 4.2 1.2 .4 30 3 .5 1.2 106 6 1.2 .4 31 .5 .8 96 1.2 Second- Run-off In Month foot-daya Maximum Minimum Mean acre-feet Oet 0 0 0 0 0 H07 1.5 .3 0 .05 3.0 Dee 21.0 2.5 .3 .68 42 C 11,887.8 1,450 0 32.6 23,580 Jan 29.6 5 .4 .95 59 Pet 192.7 47 1.9 6.88 382 Mar 9,999 1,460 96 323 19,830 Apr 988.7 92 4.2 33.0 1,960 May 110.9 8 1.2 3.58 220 Jun 19.4 1.0 .3 .65 38 Jul 3.4 .4 0 .11 6.7 Aug 0 0 0 0 0 Sep 0 0 0 0 0 ater year 1937-3 11,366.2 1,460 0 31.1 22,540 TIA JUAUA RIVER BASIN 13 Tia Juana River near Dulzura, Calif. Location.- Water-stage recorder, lat. 32°33'50", long. 116°46'25", In sec. 33, T. 18 S., R. 2 E., half a mile downstream from confluence of Conttonwood and Tecate Creeks and 5i miles south of Dulzura. Altitude, about 550 feet. Drainage area.- 478 square miles, of which 62 square miles is In Mexico. Records available.- October 1936 to September 1938. Extremes.- Maximum discharge during year, 3,520 second-feet Mar. 3 (gage height, 5.77 feet) from rating curve extended above 700 second-feet; no flow at times. 1936-38: Maximum discharge, 4,700 second-feet Feb. 7, 1937 (gage height, 6.50 feet); no flow part of each summer. Remarks.- Records fair. Regulation by storage in Morena and Barrett Reservoirs on Cottonwood Creek. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. lor. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.1 0.7 9 293 123 23 1.1 0.3 2 .1 .8 13 510 113 23 1.1 .3 S .1 .8 10 2,650 109 23 1.1 .3 4 .1 .8 11 1,180 107 21 1.1 .3 5 .1 .8 14 800 104 18 1.1 .2 6 .2 .8 11 550 96 15 1.1 .2 7 .2 .8 8.5 428 88 12 1.1 .2 8 .2 .8 7 384 80 9 1.3 .2 9 .2 .8 7.5 367 69 7 1.5 .2 10 .3 .8 13 314 62 7 2.0 .2 11 .3 .8 13 286 59 7 2.4 .2 12 1.2 .8 57 552 55 8 2.0 .2 13 .8 1.0 39 732 63 8 1.8 .2 14 .7 1.2 25 655 63 8 1.6 .2 15 .6 3.4 21 499 50 8 1.3 .2 16 .4 3.1 18 406 42 8 1.3 .2 17 .4 2.3 16 354 37 8.5 1.1 .2 18 .4 2.3 14 314 31 8. -5 .9 .2 19 .4 2.7 16 277 27 9 .9 .1 20 .4 8.5 16 247 24 7.5 .9 .1 21 .4 6.5 11 227 23 6 .9 .1 88 .4 3.4 10 205 22 5.5 .7 .1 85 .7 2.5 8.5 190 22 4.9 .7 .1 84 1.2 1.2 8.5 179 21 3.3 .7 .1 85 .8 .7 6.5 164 23 2.7 .4 .1 1'64 86 .7 .7 5.5 26 2.4 .3 .1 87 1.0 .8 40 167 23 2.0 .3 .1 88 .8 1.2 124 156 PI 1.8 .3 .1 89 .8 4.2 _ 154 19 1.5 .3 .1 SO .7 4.6 - 146 22 1.6 .3 .1 31 .7 4.2 - 131 - 1.3 - .1 Second- IMi-^fmipi Run-off In Month foot-days MaxjUnni Mean acre-feet 0 0 0 0 0 0 0 0 0 0 15.4 1.2 .1 .50 31 18,622.3 2,180 0 51.0 36,920 64.0 8.5 .7 2.06 127 553.0 124 5.5 19.8 1,100 13,681 2,650 131 441 27,140 April ...... 1,624 123 19 54.1 3,220 May...... 271.5 23 1.3 8.76 539 31.6 2.4 .3 1.05 63 July...... 5.5 3 .1 .17 11 2.48 08 4.9 1.20 - - .04 2.4 Water year 1937-3 8...... 16,249.48 2,650 - 44.5 32,240 14 TIA JUANA RIVER BASIN Tia Juana River near Nestor, Calif. Location.- Water-stage recorder, lat. 32°32'55", long. 117°05'15", on line between sees. 3 and 4, T. 19 S., R. 2 W., 14 miles south of Nestor and 3 miles upstream from mouth. Drainage area.- 1,668 square miles, of which 1,198 square miles is in Mexico. Records available.- January to September 1915, October 1936 to September 1938. Extremes.- Maximum discharge during year, 6,760 second-feet Mar. 3 (gage height, 6.38 feet), from rating curve extended above 4,100 second-feet; no flow during part of each year. 1936-38: Maximum discharge, 17,700 second-feet Feb. 7 (gage height, 8.20 feet); no flow during part of each year. Remarks.- Records fair. Regulation by storage in Morena and Barrett Reservoirs, operated by city of San Diego, and Rodriguez Reservoir, operated by Government of Mexico. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 221 144 20 2 0 439 130 24 3 0 4,950 122 23 4 0 3,010 119 21 6 0 1,640 116 20 6 0 1,090 110 17 7 0 680 100 13 8 0 618 88 10 9 0 601 76 8 10 0 412 63 6 11 0 322 59 5 12 0 816 57 3.9 13 0 1,540 61 4.2 14 0 1,100 67 3.5 16 3.3 670 63 3.1 16 3.5 496 49 5.5 17 3.7 398 42 10 18 3.9 358 35 12 19 3.9 322 31 16 20 4.4 294 28 15 21 5 272 26 11 22 4.4 240 20 7.5 23 3.5 220 19 4.6 24 2.8 205 18 2.3 25 1.7 193 18 2.0 26 0 185 18 1.4 27 14 189 20 1.3 28 42 189 20 .4 29 . 181 18 .2 30 _ 169 17 .1 31 - 158 - .1 Second- Run-off In Maxijnun M^tiiimw Mean Month foot-daya acre-feet October...... 0 0 0 0 0 0 0 0 0 0 December...... 0 0 0 0 0 33,539.7 9,710 0 91.9 66,530 Jan 0 0 0 0 0 Fet 96.1 42 0 3.43 191 tmih..'...... 22.178 4,950 158 715 43,990 April...... 1,755 144 17 58.5 3,480 271.1 24 .1 8.75 538 0 0 0 0 0 July...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 W»t»r year 1937-3 3...... 24,300.2 4,950 0 66.6 48,200 TIA JUANA RIVER BASIN 15 Campo Creek near Campo, Calif. Location.- Water-stage recorder and broad-crested weir control, lat. 32°35'20", long. 116"31'35", In sec. 24, T. 18 3., R. 4 E., on State highway, about 34 miles south west of Campo. Drainage area.- 84 square miles, of which 4 square miles Is in Mexico. Records available.- October 1936 to September 1938. Extremes.- Maximum discharge during year, 584 second-feet Mar. 3 (gage height, 2.73 feet); no flow at times in August and September. 1936-38: Maximum discharge, 1,470 second-feet Feb. 6, 1937 (gage height, 3.80 feet); no flow during October 1936. Remarks.- Records good. Discharge, in second-feet, water year October 1937 to September 1938 Day Got. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.1 0.2 1.6 5.5 11 42 14 12 4.8 1.8 0.2 0.1 .1 .2 1.6 4.8 13 89 13 3.3 1.4 .2 .1 3 .2 .2 l.S 4.8 7.5 315 12 14 3.3 1.2 .1 4 .2 .2 1.6 5.5 9 161 12 11 1.6 1.1 .2 .1 6 .1 .2 1.3 4.8 10 41 12 9.5 2.2 1.2 .2 .1 6 .1 .2 1.5 3.8 6 5 41 11 9 fi.2 1.1 .2 .1 7 .1 .2 1.6 3.8 5 5 45 10 7.5 1.6 1.1 .2 .1 8 .1 .2 1.8 4.3 4 8 41 9.5 7.5 1.8 .9 .2 .1 9 .2 .2 3.3 4.3 6 5 32 9.5 7 3.3 .7 .2 .1 10 .2 .2 4.8 3.8 9 5 26 9.5 6.5 4.3 .6 .2 .1 11 .2 .4 6.5 3.3 13 26 9.5 6.5 4.8 .6 .2 .1 12 .1 .5 13 4.8 24 60 10 6 4'. 3 .5 .2 .1 13 .1 .6 11 3.3 15 39 17 6 4.3 .6 .2 .1 14 .2 .7 8.5 3.3 11 31 18 5.5 3.3 .6 .2 .1 16 .2 1.0 6.5 4.8 9.5 27 14 5.5 3.3 .5 .2 .1 16 .2 1.4 6.5 4.3 10 26 11 6 2.8 .4 .2 .1 17 .1 1.4 5.5 3.8 9 26 9.5 7.5 l.S .3 .2 .1 18 .1 1.4 .8 3.8 8 24 8.5 8 2.2 .3 .2 .1 19 .1 1.3 .3 5.5 15 21 9 8.5 2.8 .2 .2 .1 20 .1 1.3 .8 11 11 21 8.5 8.5 3.3 .2 .2 .1 sa .2 1.5 .3 4.8 8.5 18 7 7.5 3.3 .2 .2 .1 SB .2 1.5 .8 4.3 7 18 9 6.5 1.2 .2 .2 .1 23 .2 1.4 8.5 3.8 7 17 10 4.8 1.4 .2 .2 .1 24 .2 1.6 11 1.8 6.5 17 7.5 6 3.3 .2 .2 .1 2? .2 1.6 8 1.5 6 16 9 4.3 1.8 .2 .1 .1 .1 1.6 7 1.8 6 19 10 4.8 1.1 .2 .1 .1 27 .2 1.5 6.5 2.2 34 23 9.5 4.3 .9 .2 .2 .1 SB .2 1.5 4.3 2.2 34 18 8.5 5.5 .9 .2 .2 .1 29 .2 1.6 4.3 7.5 21 8.5 6.5 .8 .2 .2 .1 SO .2 1.4 6 7.5 18 11 4.S .9 .2 .1 .1 Si .2 5.5 4.8 15 3.8 .2 .1 Second- Run-off In Month foot-days Ma*!* Minimum Mean aore-feet Dot 4.9 0.2 0.1 0.16 9.7 Hen 27.2 1.6 .2 .91 54 Dec 161.5 13 1.3 5.21 320 C 2,652.5 492 .1 7.27 5,260 Jan uary 135.5 11 1.5 4.37 269 Fet> S17.8 34 4.8 11.4 630 Mar 1,334 315 15 43 2,650 Apr 11...... 316.5 18 7 10.6 628 Kay 223.8 14 3.8 7.82 444 Jun 76.9 4.8 .8 2.56 153 Jul 17.5 1.8 .2 .66 35 Auga:::::::::::::::::::::::::::::::::::: 5.8 .2 .1 .19 12 Bep 3.0 .1 .1 .1 6.0 1ater year 1937-2 2,624.4 315 .1 7.19 5,210 16 OTAY RIVER BASIN Otay River at Savage Dam, Calif. Location.- Lat. 32°36'40", long. 116°55'40", in NWi sec. IS, T. 18 S., R. IE., at savage Dam, at Lower Otay Reservoir (altitude, top of spillway gates, 491 feet). Zero of gage is 347.20 feet above mean sea level. Drainage area.- 98 square miles. Records available.- October 1936 to September 1938. Remarks.- Records of discharge represent flow into Lower Otay Reservoir,computed on basis of records of storage, release, leakage, spill, evaporation, and rainfall. Records furnished by city of San Diego. Original dam destroyed Jan. 27, 1916, present structure placed in operation mar. 13, 1922. Monthly discharge, water year October 193V to September 1938 Mean Run-off in Month (second-feet) acre-feet 3 98 243 1 1 ' i September...... 0 0 Water year 1937-38.. 28.1 20,360 SWEETWATER RIVER BASIN Sweetwater River at Sweetwater Dam, Calif. Location.- Lat. 32°41'20", long. 117°00'35" at Sweetwater Dam, In La Naclon grant, 6 miles east of National City, San Diego County, and about 8 miles upstream from mouth. Altitude of crest of dam about 200 feet, that of bed of stream about 150 feet. Drainage area.- 181 square miles. Records available.- December 18S7 to September 1938. Remarks.- Records of discharge represent flow into Sweetwater Reservoir, computed on oasis of records of storage, release, leakage, spill, evaporation, and rainfall. Records furnished by California Water & Telephone Co. Monthly discharge, water year October 1937 to September 1938 Month Mean Run-off in (second-feet) acre -feet 0 1 95 2,370 May...... 1,610 175 5.0 0 0 Water year 1937-38.. 43.1 31,220.0 SAN DIEGO RIVER BASIN 1 San Diego River at El Capitan Dam, Calif. Location.- Lat. 32°53'00 n , long. 116°48'40", in NEi sec. 7, T. 15 S., R. 2 E., at El Capitan Dam, one mile downstream from Chocolate Creek and 7 miles east of Lakeside. Altitude of spillway crest, 750 feet. Drainage area.- 190 square miles. Records available.- October 1936 to September 1938. Remarks.- Flow partly regulated at Cuyamaca Reservoir. Records of discharge represent now into El Capitan Reservoir (capacity, 116,500 acre-feet), computed on basis of records of storage, release, leakage, spill, evaporation, and rainfall. Records furnished by city of San Diego. Monthly discharge, water year October 1937 to September 1938 Mean Run-off in Month (second-feet) acre-feet 20 2 1 240 April 85 9 p. t q 25 4 IS 4 September...... 7.38 439 Water year 1937-38.. 86.1 62,340 18 SAN DIEGO RIVER BASIN San Diego River near Santee, Calif. Location.- Water-stage recorder, lat. 32°49'20", long. 117°03'25", in the Ex Mission San Diego grant, in Mission Gorge, 6 miles west of Santee, San Diego County. Alti tude, about 205 feet. Drainage area.- 380 square miles. Records available.- May 1912 to September 1938 (prior to 1920, incomplete). Average discharge.- 23 years (1912-15, 1917-19, 1920-38), 38.0 second-feet. Extremes.- Maximum discharge during year, 7,350 second-feet Mar. 3 (gage height, 7.05 feet), from rating curve extended logarithmically above 4,600 second-feet; practi cally no flow at times during summer months. 1912-38: Maximum discharge, 70,200 second-feet Jan. 27, 1916 (gage height, 25.1 feet); practically no flow for several months each year except for a small amount of ground water that was forced to surface. Remarks.- Records good. Diversions for Irrigation above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. Her. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.2 0.2 0.2 0.2 0.6 496 31 82 0.6 0.3 0.2 0.2 a .2 .2 .2 .2 .4 1,700 24 96 .5 .3 .2 .2 s .2 .2 .2 .2 .4 3,770 24 87 .4 .3 .2 .2 4 .2 .2 .2 .2 .4 925 27 98 .3 .3 .2 .2 6 .2 .3 .1 .2 .4 470 31 98 .3 .3 .2 .2 e .2 .2 .1 .2 .*2.2 295 80 80 .6 .3 .2 .2 7 .2 .2 .1 .2 200 91 58 .4 .3 .2 .2 8 .2 .2 .1 .2 .2 189 82 45 .4 .3 .2 .2 9 .2 .2 .2 .2 .6 165 77 26 .4 .3 -.2 .2 10 .2 .2 .2 .S .9 100 75 17 .4 .3 .2 .2 11 .2 .2 .2 .2 1.0 87 65 10 .6 .3 .2 .2 12 .2 .2 .9 .2 2.1 379 60 8.5 .4 .3 .2 .2 13 .2 .2 .4 .2 1.2 1,250 68 8 .2 .3 .2 .2 14 .2 .2 .4 .2 .9 1, 220 75 7 .3 .3 .2 .2 16 .2 .3 .4 .7 .7 745 75 8.5 .3 .3 .2 .8 16 .2 .3 .3 .4 .9 590 75 14 .3 .2 .2 .1 17 .2 .4 .3 .2 .9 486 77 21 .3 .2 .2 .1 18 .2 .4 .2 .2 .6 400 77 18 .3 .2 .2 .1 19 .5 .4 .2 .3 1.0 307 26 21 .3 .2 .2 .1 20 .S .4 .1 .6 .6 259 14 27 .3 .2 .2 .1 S3. .5 .2 .1 .3 .4 230 12 26 .3 .2 .2 .1 22 .4 .2 ,1 .2 .3 210 11 23 .3 .2 .2 .1 23 .4 .2 .4 .1 .3 193 13 20 .3 .2 .2 .1 24 .4 .2 .4 .1 .3 174 13 13 .3 .2 .2 .1 25 .4 .2 .2 .1 .3 16.8 24 8.5 .3 .2 .2 .1 26 .4 .1 .4 .1 .2 156 58 4.5 .3 .2 .2 .1 27 .4 .2 .4 .1 5.5 153 63 3.0 .3 .2 .2 .1 28 .9 .2 .2 .2 24 145 52 1.3 .3 .2 .2 .1 29 .6 .2 .2 .6 _ 137 43 1.0 .3 .2 .2 .1 SO .6 .2 .2 .4 _ 63 54 .9 .3 .2 .2 .1 31 .2 .2 .2 - 37 .8 - .2 .2 - Second- Run-off In Month foot -days nffly^inuBi Minimum Mean acre-feet 9.8 0.9 0.2 0.32 19 7.0 .4 .1 .23 14 7.8 .9 .1 .25 15 17,205.4 2,000 - 47.1 34,120 7.6 .7 .1 .25 15 45.5 24 .2 1.62 90 15,699 3,770- 37 506 31,140 April...... 1,497 91 11 49. 9 2,970 932 .0 98 3o!l 1,850 io!e .6 .2 .35 21 July...... 7.7 .3 .*2g 25 15 6.2 .2 '.20 12 4.5 .2 .1 .15 8.9 Water year 1937-38...... 18,234.7 3,770 .1 50.0 36,170 SAN DIEGO RIVER BASIN 19 Boulder Creek at Cuyamaca Reservoir, near Julian, Calif. Location.- Lat. 32°59'15B , long. 116°35'10", In NEi sec. 8, T. 14 S., R. 4 E., at cuyamaca Reservoir, 7 miles south of Julian. Altitude, 4,590 feet (revised). Drainage area.- 12.0 square miles. Records available.- June 1912 to September 1926 (outflow from Cuyamaca Reservoir) and October lysb to September 1938 (Inflow to Cuyamaca Reservoir). Remarks.- Discharge computed on basis of records of rainfall, evaporation, storage, over- now, and release from Cuyamaca Reservoir. Records furnished by La Mesa, Lemon Grove, and Spring Valley Irrigation District. Cuyamaca Reservoir was built In 1886 and enlarged In 1894. Its present capacity is 11,600 acre-feet (revised). Monthly discharge, water year October 1937 to September 1938 Month. Mean Run-off In (second-feet) acre-feet 7 S £9 Sept ember ...... 4.2 249 Water year 1937-38... 18.2 13,178 20 SAN DIEGO RIVER BASIN San Vicente Creek at Foster, Calif. Location.- Water-stage recorder, lat. 32°54'40", long. 116°55'35", in sec. 31, T. 14 S., R. 1 E., half a mile north of Foster. Altitude, about 750 feet. Drainage area.- 75 square miles. Records available.- January to April 1915, October 1936 to September 1938. Extremes.- Maximum discharge during year, 5,270 second-feet Mar. 2 (gage height, 5.59 feet), from rating curve extended above 1,300 second-feet; no flow during part of year. 1915, 1936-38: Maximum discharge, 9,400 second-feet, Feb. 7, 1937 (gage height, 6.80 feet); no flow during part of each year. Remarks.- Records fair. Discharge for Oct. 1 to Feb. 10, Feb. 20-26, Apr. 1-18, Apr. 26 to May 16, June 6 to Sept. 30 computed on basis of 15 discharge measurements and records for stations on nearby streams. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.2 433 26 11 0.4 0.2 2 .1 1,380 25 12 .3 .2 3 .1 1,790 24 11 .3 .2 4 .3 545 22 10 .3 .2 6 .2 272 21 9 .3 .2 6 .1 160 20 8 .3 .2 7 .1 133 18 7 .3 .2 8 .1 154 17 6.5 .3 .2 9 .2 138 17 6 .3 .1 10 .2 143 18 5.5 .3 .1 11 1.0 143 19 4.9 .3 .1 12 .2 346 20 4.9 .3 .1 13 .2 302 23 4.9 .3 .1 14 .2 198 20 4.6 .3 .1 16 .2 143 17 5.5 .2 .1 16 .2 122 16 6 .2 .1 17 .1 118 14 6.5 .2 .1 18 .1 100 12 7 .2 .1 19 .2 91 11 7 .2 .1 20 .2 67 10 7 .2 .1 21 .2 58 10 6.5 .2 .1 22 .2 52 9 5 .2 .1 23 .1 49 9 4.1 .2 .1 24 .1 42 10 3.0 .2 .1 25 .1 40 20 1.8 .2 .1 26 .1 34 17 1.6 .2 .1 27 65 35 14 1.4 .2 .1 28 123 35 12 1.2 .2 .1 29 38 10 1.0 .2 .1 30 34 10 .8 .2 .1 31 29 .6 .1 Second- Run-off In Month foot-days Maximum Mlnlnpyp* Mean acre-feet Dot *1.5 0.048 3.0 Hov *2.0 1 : .067 4.0 Dec *3.0 .097 6.0 C 14,388.1 2,940 0 39.4 28,540 Jan uary *4.5 .145 8.9 Fet 193 123 .1 6.89 383 Mar 7,224 1,790 29 233 14,330 Apr 11...... 491 26 9 16.4 974 Ma, 171.5 12 .6 5.53 340 Jun 7.5 .4 .2 .25 15 Jul 3.9 .2 .1 .13 7.7 Aug USt...... *3.1 .1 6.1 Sep *1.5 .05 3.0 1ater year 1937-3 8,106.5 1,790 - 22.2 16,080 Estimated. SAN DIEGUITO RIVER BASIN 31 Santa Isabel Creek near Mesa Grande, Calif. Location.- Water-stage recorder and "broad-crested weir control, lat. 33°07'15", long. 116"48'30% in NEirNWi sec. 20, T. 12 S., R. 2 E., 4$ miles southwest of Mesa Grande and half a mile upstream from confluence with Black Canyon Creek. Altitude, about 8,000 feet. Drainage area.- 58 square miles. Records available.- October 1936 to September 1938. December 1912 to September 1928 at site 1 mile upstream; records equivalent. Extremes.- Maximum discharge during year, 8,000 second-feet Mar. 2 (gage height, 7.30 feet), from rating curve extended above 1,100 second-feet; minimum, 0.4 second-foot Oct. 24-29, Sept. 5, 6. 1918-24, 1936-38: Maximum discharge, 21,100 second-feet Jan. 27, 1916, by slope- area method; no flow at times. Remarks.- Records good. Discharge, In aecond-feet, water year October 1937 to September 1938 Day Oet. Her. Dec. Jan. Feb. Ear. Apr. May June July Aug. Sept. 1 1.1 0.7 1.8 4.8 18 443 68 54 19 9.5 2.0 0.5 2 1.1 .6 2.3 4.5 14 1,750 63 51 19 10 2.4 .5 3 1.1 .6 2.2 4.8 11 2,000 66 54 18 10 1.7 .5 4 1.3 .6 2.0 4.8 30 769 68 44 17 9 2.2 .5 6 1.2 .6 1.6 4.5 26 454 86 42 15 9.5 1.8 .4 6 1.1 .7 1.6 5 17 247 79 38 15 7 2.3 .4 7 1.0 .8 1.5 5.5 13 138 76 34 15 8.5 2.3 .5 8 .8 1.1 1.7 4.8 13 176 72 32 14 9 2.1 .7 9 .8 .9 2.3 4.1 14 103 63 32 15 7.5 2.6 .8 10 .9 .9 7.2 4.1 22 76 60 32 16 5.5 2.1 .9 11 .8 .9 8 4.8 88 68 54 30 17 4.8 1.0 .8 12 .8 1.2 19 4.8 66 709 51 29 17 5.1 1.0 .6 13 .8 1.8 10 3.3 34 612 76 30 16 4.2 .7 .7 14 1.0 1.8 6 3.3 26 402 76 27 16 5 1.1 .7 15 1.2 2.0 4.5 9.5 26 283 54 27 16 4.5 1.8 .7 16 1.4 1.8 3.1 10 26 212 46 30 18 4.2 1.4 .8 17 1.1 2.3 3.3 8 226 40 34 17 4.2 2.5 .9 18 1.0 2.6 3.3 7 19 162 38 32 16 3.6 2.9 .9 19 .8 1.8 3.5 15 32 143 34 34 15 3.5 1.7 .9 20 .8 1.7 2.6 27 20 143 34 27 15 3.2 1.1 1.3 21 .8 1.7 3.1 11 18 128 34 24 14 2.7 2.1 .9 22 .7 1.6 3.5 9 16 113 32 24 12 2.4 1.7 .7 23 .5 1.4 9 9 16 103 34 23 11 2.7 .6 .7 24 .4 1.6 11 6.5 16 94 34 24 11 3.1 .4 .8 25 .4 2.0 8 4.5 14 94 54 24 10 4.0 .1 .8 26 .4 2.1 14 3.5 13 103 46 24 10 4.0 .0 .8 27 .4 1.6 9.5 3.1 163 103 38 24 9.5 3.1 .3 .7 28 .4 1.6 9 5 195 98 40 23 10 2.9 .2 .7 29 .4 1.2 6 18 108 42 23 9.5 3.3 .4 .7 30 .5 1.5 4.8 15 98 49 23 11 2.4 .9 .7 31 .5 4.5 8 82 20 1.6 1.0 Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet Dot 25.5 1.4 0.4 0.82 51 HOT einbor ...... « « . * .... 41.7 2.6 .6 1.39 83 Dec 169.9 19 1.5 5.48 337 Calendar year 192 23,192.4 2,440 .3 63.5 46,000 Jan 232.2 27 3.1 7.49 461 Pet 986 195 11 35.2 1,960 Mar 10,240 2,000 68 330 20,310 Apr 1,607 86 32 53.6 3,190 May 969 54 20 31.3 1,920 JUD 434 19 9.5 14.5 861 All 160.0 10 1.6 5.16 317 Aug 51.4 2.9 .7 1.66 102 Sep 21.5 1.3 .4 .72 43 «ater year 1937-3 8...... 14,938.2 2,000 .4 40.9 29,640 88 SAN DIEGUITO RIVER BASIN San DIegulto River at Lake Hodges, Calif. Location.- Lat. 33°02'55", long. 117°07'25 11 , In NWi sec. 18, T. 13 S., R. 2 W., at Lake Hodges dam, 5i miles southwest of Escondido. Altitude of bed of stream, 200 feet. Drainage area.- 303 square miles (revised). Records available.- January 1916 to September 1938. Remarks.- Diversions for Irrigation In San Pasqual valley, above Lake Hodges. Some pumping from wells along river. Gaging station formerly maintained at dam site was discontinued In 1919, when Lake Hodges dam was completed. Records of discharge represent flow Into Lake Hodges (capacity, 37,530 acre-feet), computed on basis of records of storage, release, leakage, spill, evaporation, and rainfall. Records furnished by city of San Diego. Monthly discharge, water year October 1937 to September 1938 Mean Run-off In Month (second-feet) acre-feet 46 425 145 6,530 May...... 25 .50 30 Water year 1937-38 . . 126 91,560 SAN LUIS RET RIVER BASIN San Luis Rey River at Lake Henshaw, near Mesa Grande, Calif. Location.- Lat. 33°14'15", long. 116°45'50", in NWi sec. 10, T. 11 S., R. 2 E., at Henshaw Dam, 5 miles north of Mesa Grande. Drainage area.- 209 square miles. Records available.- October 1911 to September 1938. Average discharge.- 27 years, 45.9 second-feet. Remarks.- No diversions above station. Lake Henshaw Reservoir (capacity, 203,000 acre-feet) was completed In 1923, and the gaging station formerly maintained 1 mile below the dam was abandoned. Discharge in second-feet computed by the Geological Survey from records furnished by San Diego County Water Co. Monthly discharge, water year October 1937 to September 1938 Mean Run-off in Month (aecond-feet) acre-feet December ...... 16.2 999 Calendar year 1937 . . . 118-67 85,912 September ...... 15.8 939 Water year 1937-38... 99.87 72,300 SAN LUIS KEY RIVER BASIN 23 San Luls Rey River at Monserate Narrows, near Pala, Calif. Location.- Water-stage recorder, lat. 33°20'20", long. 117°08'20", In Monserate grant, 4 miles southwest of Pala, San Diego County. Drainage area.- 383 square miles. Records available.- December 1935 to September 1938. Remarks.- Records good except those for period of missing gage heights, July 18-25, which were Interpolated between discharge measurements and are fair. Records are not obtained during flood periods. Discharge, In seoond-feet, water year October 1957 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 6 7 10 15 4S _ 87 66 19 11 11 7 2 7 7 8 17 48 _ 82 66 22 11 9 6.5 3 7 7 7 17 31 - 74 63 18 12 8 6 4 9 8 10 19 250 _ 66 64 15 14 9 6 6 9 7 9 19 298 - 74 54 16 12 10 6.5 6 8 8 10 24 93 _ 70 46 16 11 9.5 7 7 8 9 9 21 44 - 60 46 IS 11 9.5 6 8 6 10 8 17 31 _ 54 46 15 11 8 6.5 9 6 9 8 15 31 342 54 46 15 13 8 6.5 10 6 9 10 15 57 247 51 46 14 12 7.5 7 11 5.5 7 14 14 41 194 49 46 14 11 8 6.5 12 5.5 5.5 34 12 333 - 49 46 16 11 9 7 IS 6 5.5 34 15 122 - 70 46 16 10 7.5 6.5 14 7 5.5 21 11 57 448 74 39 14 10 9.5 6 16 5.5 6 19 17 57 297 66 39 15 10 9 6 16 5.5 8 21 12 44 264 60 44 15 10 8 6 17 5.5 9 19 11 48 165 60 49 12 10 9.5 5.5 18 5.5 9 17 10 24 99 54 51 14 10 10 6 19 5.5 9 17 17 73 128 46 51 13 10 10 6.5 20 7 7 17 41 62 140 46 51 12 10 11 5.5 21 5.5 8 14 31 44 146 46 46 14 10 10 6.5 22 5.5 8 10 21 28 140 46 44 12 10 9.5 5.5 23 5.5 9 19 12 34 108 46 39 10 10 8 6 24 5.5 9 21 12 31 108 46 29 11 10 8 6 25 5.5 8 19 11 21 116 70 28 10 10 8 6.5 26 7 10 21 10 28 122 66 26 9 11 9 6 27 7 9 28 10 108 57 23 13 11 9.5 6 28 8 11 21 9 _ 95 49 22 11 10 13 6.5 29 9 12 15 15 _ 108 42 22 10 11 12 6 SO 9 10 15 37 _ 103 54 22 11 12 12 6.5 31 6 14 21 - 87 - 20 - 11 9.5 - Seoond- Run-off in Month foot-days Un-rl^m Minimum Mean acre-feet 204.0 9 5.5 6.58 405 246.5 12 5.5 8.22 489 December. .« « . ..« ».«. . 499 34 7 16.1 990 528 41 9 17.0 1,050 _ - March...... _ _ _ _ _ April ...... 1,768 87 42 58.9 3,510 May...... 1,316 66 20 42.4 2,610 420 22 10 14.0 833 July...... 336 14 10 10.8 666 289.5 13 7.5 9.34 574 188 7 5.5 6.27 573 Water year 24 SAN LUIS KEY RIVER BASIN San Luls Rey River near Bonsall, Calif. Location.- Water-stage recorder, lat. 33°15'05", long. 117°14'55", in NEi sec. 1, T. US., R. 4 W., three-quarters of a mile downstream from highway bridge on Fallbrook- Escondido road and 3 miles southwest of Bonsall. Altitude, about 120 feet. Drainage area.- 514 square miles. Records available.- April 1912 to September 1918, December 1929 to September 1938. Extremes.- Maximum discharge during year, 18,100 second-feet Mar. 3 (gage height, 12.60 feet), from rating curve extended above 2,400 second-feet; no flow Oct. 1-23. 1912-18, 1929-38: Maximum discharge, that of Mar. 3, 1938; maximum gage height for flood of January 1916 not known, as all equipment was destroyed; no flow part of each year. Remarks.- Records good. Discharge for period of low flow, July 15 to Sept. 30, computed on basis of five discharge measurements, estimates of discharge, and records for nearby stations. Storage at Lake Henshaw; many diversions above station. Discharge, In eecond-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Fell. Mar. Apr. May June July Aug. Sept. 1 0 0 2 11 22 58 2,060 130 92 20 5 0.5 0.2 2 0 2 8.5 21 48 4,040 118 89 16 3.4 .5 .2 3 0 2 10 20 43 9,660 112 81 15 3.4 .5 .2 4 0 6 11 20 81 2,180 106 76 15 3.4 .5 .2 6 0 2 8 9 20 112 1,110 108 71 14 4.5 .5 .2 6 0 5 10 20 67 757 99 64 14 5 .4 .8 7 0 6.5 11 19 51 608 87 58 14 5.5 .4 .2 8 0 11 19 47 591 81 51 13 5 .3 .2 9 0 14 18 50 475 78 45 13 5 .3 .2 10 0 17 20 51 394 76 42 10 5 .2 .2 11 0 20 20 64 345 72 43 5 5 .2 .2 12 0 30 20 106 1,310 76 42 6.5 4.5 . .2 .2 13 0 8.5 32 19 78 1,140 100 40 10 3.9 .1 .2 14 0 9 27 20 58 739 102 40 11 3.9 .1 .2 16 0 7.5 24 30 53 505 89 43 10 3.5 .1 .2 16 0 10 22 26 56 439 85 50 11 3.2 .1 .2 17 0 9 21 24 50 401 81 58 10 3.0 .1 .2 18 0 9 21 24 13 341 74 58 10 2.6 .1 .2 19 0 7.5 21 30 53 294 71 59 10 i.e .1 .2 20 0 9 19 39 54 266 71 53 11 1.2 .1 .1 21 0 7.5 19 40 43 246 69 48 10 .8 .1 .1 22 0 8.5 18 34 42 229 67 45 10 .7 .1 .1 23 0 8.5 31 28 42 193 64 45 8.5 .7 .1 .1 24 .1 9 28 24 3S 172 64 35 10 .9 .1 .1 25 .1 8.5 27 23 36 178 89 31 9 .8 .1 .1 26 .1 9 35 23 35 190 81 30 7 .6 .1 .1 27 .1 8.5 36 25 116 164 71 26 7 .6 .1 .1 28 .1 9 2B 25 874 159 67 23 7 .6 .2 .1 29 .1 9 26 31 162 67 23 7.5 .6 '.2 .1 30 .1 11 24 42 148 81 21 6 .5 .1 31 .2 22 38 136 20 .5 Second- Month MoTlfmifli Run-off In foot -days Minimum Mean acre-feet Oct 0.9 0.2 0 0.029 1.8 No-! 209.5 11 .2 6.98 416 Dec 643.5 36 8.5 20.8 1,280 Calendar year 193 54,529.8 7,780 0 149 108,200 Jan 784 42 18 25.3 1,560 Pet 2,449 874 35 87.5 4,860 Max 29,632 9,660 136 956 58,770 Apr 2,536 130 64 84.5 5,030 Ma; 1,502 92 20 48.5 2,980 fan 320.5 20 5 10.7 636 Jul 85.1 5.5 .5 2.75 169 Aug 6.8 .5 .1 .219 13 Sep 4.9 .2 .1 .163 9.7 1ater year 1937-2 ^8,174.2 9,660 0 105 75,730 SAN LUIS KEY RIVER BASIN 25 San Luis Rey River at Oceanside, Calif. Location.- Water-stage recorder, lat. 33°12'40", long. 117°22'40", in NWi sec. 25, T. 11 S., R. 5 W-, half a mile above State Highway bridge at Oceanside. Altitude, about 20 feet. Drainage area.- 557 square miles. Records available.- April 1912 to September 1914, January 1916, and December 1929 to September 1938. Extremes.- Maximum discharge during year, 16,500 second-feet Mar. 3 (gage height, 10.75 feet), from rating curve extended logarithmically above 2,500 second-feet; no flow during part of year. 1912-14, 1916, 1929-38: Maximum discharge, 95,600 second-feet Jan. 12, 1916; no flow for several months of each year. Remarks.- Records fair. Storage at Lake Henshaw, and several diversions above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. toy June July Aug. Sept. 1 0 3.2 38 2,000 122 72 16 2 0 4.5 44 2,860 113 91 15 S 0 5 38 11,300 113 87 13 4 0 4.8 51 2,650 110 72 9 B 0 4.8 85 1,480 117 61 8 6 0 5 70 1,060 117 56 8 7 0 5.5 47 798 98 49 6.5 8 0 6 40 674 80 45 5 9 0 7 38 568 66 40 4.5 10 0 9.5 44 465 64 38 6 11 0 16 52 390 66 36 4.4 12 0 20 81 1,160 69 34 1.2 13 0 8 88 1,140 91 34 .5 14 0 8 65 613 110 36 .7 IE 0 15 55 462 95 38 .5 16 0 19 54 402 S7 47 1.0 17 0 17 57 421 77 53 1.0 18 0 17 52 421 69 58 .6 19 0 20 58 391 61 56 .1 20 0 24 61 330 53 56 .6 21 0 29 58 301 51 51 .7 22 0 27 46 262 51 45 .5 23 0 23 38 213 51 42 .1 24 0 21 35 193 53 29 0 25 0 19 34 166 84 25 0 26 0 18 32 200 102 22 0 27 0 16 57 161 69 18 0 28 0 16 347 151 53 18 0 29 0 19 161 51 16 0 SO 0 26 156 61 16 0 31 .8 26 - 137 16 - Second- Run-off In Honth foot-days MflXlgimn Minimum Mean acre-feet October...... 0 0 0 0 0 Hovember...... 0 0 0 0 0 December...... 8 .8 0 .03 1.6 Calendar year 1937...... 51,261.0 7,930 0 140 101, 700 Jan 459.3 29 3.2 14.8 911 Fel 1,759 347 32 62.8 3,490 Maxwih _-----...... 31,686 11,300 137 1,022 62,850 April...... 2,404 122 51 80.1 4,770 toy...... 1,357 91 16 43.7 2,690 102.9 16 0 3.43 204 July...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Water year 1937-J 8...... 37,769.0 11,300 0 104 74,910 26 SANTA MARGARITA RIVER BASIN Temecula Creek at Nigger Canyon, near Temecula, Calif. Location.- Water-stage recorder, lat. 33°29'40", long. 116°59'00", in Pauba grant, at upper end of Nigger Canyon, a quarter of a mile downstream from Arroyo Seco and 10 .miles east of Temecula, Riverside County. Altitude, about 1,350 feet. Drainage area.- 319 square miles. Records available.- January 1923 to September 1938. Average discharge.- 15 years, 16.0 second-feet. Extremes.- Maximum discharge during year, 14,600 second-feet (estimated) Mar. 2 (gage height, 11.27 feet); minimum, 2.6 second-feet Oct. 1-10. 1923-38: Maximum discharge, 17,100 second-feet Feb. 16, 1927 (gage height, 19.5 feet); minimum, 0.6 second-foot Aug. 17, 1934. Remarks.- Records poor. Discharge for Mar. 1-5 computed on basis of records for nearby stations. Records for remainder of year furnished by Santa Margarita Ranch. No diversions above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. Kay June July Aug. Sept. 1 2.6 3.2 5.5 8.5 23 180 42 23 13 7.5 6.5 5 2 2.6 3.5 5.5 7 22 4,100 39 33 9 6.5 4.7 5 3 2.6 3.5 5.5 6.5 35 3,500 44 33 9 6.5 5 4.8 4 2.6 3.5 5.5 7 95 1,300 34 36 9.5 6.5 5 4.8 6 2.6 3.8 5.5 7 50 400 30 27 11 6.5 5 4.8 6 2.6 3.8 5.5 7 28 140 30 26 10 6.5 4.7 5 7 2.6 3.8 5.5 7.5 18 125 30 28 9.5 6.5 5 5 a 2.6 3.7 5.5 8 17 115 30 25 11 6.5 5 4.6 9 2.6 3.6 5.5 8 20 95 30 22 13 6.5 5 4.3 10 2.8 3.6 6 8 24 90 36 20 12 6 5.5 4.3 11 2.6 3.8 7 7.5 48 95 37 24 9 6 5.5 4.4 12 2.7 4.0 8 7.5 79 235 38 20 9.5 6 8.5 4.3 13 2.7 4.0 8 7.5 69 195 38 19 9 6 6.5 4.3 14 2.7 4.4 8 7 65 180 36 18 7 6 6.5 4.3 16 2.7 4.6 8 7 62 155 33 19 7 6 6 4.4 16 2.7 4.8 7.5 7 55 115 29 19 7 5.5 5.5 4.4 17 3.5 5 7 7 46 115 28 17 7.5 5.5 6 4.3 18 3.7 5 7 9 41 110 26 16 7.5 5.5 5.5 4.4 19 3.0 5 7 10 43 80 28 IS 8.5 5.5 5.5 4.4 20 3.0 5 6.5 13 33 60 27 17 8.5 5 5.5 4.2 21 3.0 4.8 6.5 11 25 60 27 13 8.5 5 5 4.0 22 3.0 4.8 6.5 10 21 60 26 13 7.5 7 4.9 3.8 23 3.0 4.8 S.5 10 16 65 25 13 6.5 6.5 4.8 4.1 24 3.1 4.8 11 10 16 62 23 13 6.5 6 4.7 4.1 25 3.1 4.8 11 10 16 65 30 12 7.5 6 4.6 4.6 26 3.1 5.4 11 10 16 68 18 14 7.5 6 4.6 4.3 27 3.1 5.4 13 9 35 55 17 14 7.5 6 5 4.6 28 3.2 5.4 11 8.5 50 50 19 11 7.5 6.5 7 4.3 29 3.2 5.4 10 13 55 26 10 7.5 8 7 4.3 30 3.2 5.4 10 15 48 30 11 7.5 8.5 6.5 4.0 31 3.2 10 15 41 12 7.5 6 Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet Oot 89.5 3.7 2.6 2.89 178 No? 132.6 5.4 3.2 4.42 263 Dec 238.0 13 5.5 7.68 472 C alendar year 1937...... 16,948.1 2,230 1.6 46.4 33,620 Jan UaX*y* ...... 278.5 15 6.5 8.98 552 Pet 1,068 95 16 38.1 2,120 Bar 12,014 4,100 41 3S8 23,830 Apr 906 44 17 30.2 i,soo Hay 596 36 10 19.2 1,180 Jun 261.5 13 6.5 8.72 519 Jul 195.5 8.5 5.0 6.31 388 Aug 172.5 8.5 4.6 5.56 342 S»p 133.1 5.0 3.8 4.44 264 » ater year 1937-3 16,085.2 4,100 2.6 44.1 31,910 SANTA MARGARITA RIVER BASIN 27 Temecula Creek at Railroad Canyon, near Temecula, Calif. Location.- Water-stage recorder, lat. 33°28'25", long. 117°08'35", in Temecula grant, an eighth of a mile downstream from confluence with Murrieta Creek, at upper end of Temecula or Railroad Canyon, li miles south of Temecula, Riverside County. Alti tude, about 950 feet. Drainage area.- 592 square miles. Records available.- January 1923 to September 1938. Average discharge.- 15 years, 28.1 second-feet. Extremes.- Maximum discharge during year, 21,700 second-feet Mar. 2 (gage height, 13.91 feet), from rating curve extended above 9,300 second-feet; minimum, 6 second-feet Oct. 18. 1923-38: Maximum discharge, about 27,600 second-feet Feb. 16, 1927 (gage height, 15.00 feet); minimum, 0.4 second-foot July 16, 1925. Remarks.- Records poor. Pumping diversions affect flow considerably during irrigation season. Records furnished by Santa Margarita Ranch except for period Feb. 27 to Mar. 5. Discharge, In second-feet, water year October 1937 to September 193S Day Oct. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 7.5 8 10 11 18 2,620 60 40 12 10 7 7 2 8 8 10 11 11 11,500 59 32 11 9.5 7 7 3 8 8 10 11 13 8,000 58 28 11 9.5 7 7 4 8 8 10 11 27 1,700 50 27 11 9.5 8 7.5 5 S 8.5 9.5 11 18 950 51 25 11 9.5 8.5 7 6 7.5 9.5 9.5 11 12 320 50 24 11 9.5 7.5 7 7 7.5 9 10 11 11 250 44 19 11 9.5 7.5 8 8 7 8.5 10 10 11 350 41 16 12 9.5 8 8 9 6.5 8.5 10.5 9.5 19 220 46 16 14 9 7.5 7.5 10 7 9 12 10 23 190 40 16 13 8.5 7.5 7.5 11 6.5 9 13 10 42 180 35 17 13 8.5 7.5 7.5 12 7 9.5 15 11 46 1,810 40 18 12 8 8 7 13 6.5 9.5 12 12 740 61 18 12 8 7.5 6.5 14 7 9 11 13 19 360 54 18 12 8.5 7.5 7.5 16 7.5 9.5 10 14 15 290 47 20 12 8 8 7.5 16 7.5 9.5 10 11 12 210 31 11 8 8.5 7.5 17 7 9.5 10 11 12 200 28 20 11 8 9 7.5 18 6.5 9.5 10 12 13 160 25 20 11 8 8.5 8.5 19 7 9 10 14 21 120 25 20 11 8 8 7 20 7 9.5 9.5 13 18 115 25 19 11 S 8 7 21 7 9.5 10 10 16 100 32 20 10 8.5 8 7 22 7 9.5 11 10 14 92 29 16 11 8.5 8 8 23 7.5 9.5 14 10 IS 98 28 16 11 8 7.5 8 24 7.5 9.5 12 9.5 12 90 27 14 10 8 7.5 8 25 7.5 9.5 12 9 13 90 35 11 10 8 7 7.5 26 7.5 9.5 15 10 14 90 27 10 9.5 7.5 6.5 8.5 27 8 9.5 13 10 130 82 21 11 9.5 7.5 7 8.5 28 8 9.5 12 12 450 73 27 11 10 7.5 8 8.5 29 8 9.5 12 16 78 30 11 10 7 8 8 30 8 9.5 13 12 70 44 11 10 7 7.5 7.5 31 7.5 12 11 63 12 7.5 7.5 Second- Run-off in Month foot -days Maxijnum Minimum Mean acre-feet Dot 228.0 8.0 6.5 7.4 452 Not 273.5 9.5 8.0 9.1 542 Dec 348.0 15 9.5 11.2 690 C 28,566.5 4,700 5.5 78.3 55,970 Jan Tiarr* . « . 347.0 16 9 11.2 688 Pet 1,047 450 11 37.4 2,080 Mar 31,211 11,500 63 1,007 61,910 Apr 11...... 1,170 61 21 39.0 2,320 H., 579 40 10 18.7 1,150 Jun 334 14 9.5 11.1 662 Jul 260 10 7.0 8.39 516 Aug a:::::::::::::::::::::::::::::::::::: 238.5 9.0 6.5 7.69 473 Sej 8.5 6.5 7.55 449 1ater year 1937-3 8...... 36,262.5 11,500 6.5 99.3 71,930 28 SANTA MARGARITA RIVER BASIN Santa Margarita River near Fall Brook, Calif. Location.- Water-stage recorder, lat. 33°24'05", long. 117°15'10", in sec. 12, T. 9 S., R. 4 W., 2 miles north of Fall Brook. Altitude, about 350 feet. Drainage area.- 645 square miles. Records available.- November 1924 to September 1938. Average discharge.- 13 years, 37.7 second-feet. Extremes.- Maximum discharge during year, 28,000 second-feet (estimated) Mar. 2 (gage height, 14.0 feet); minimum daily discharge, 6.5 second-feet Oct. 11 and 13. 1924-38: Maximum discharge, about 33,100 second-feet Feb. 16, 1927 (gage height, 15.6 feet); minimum, 0.1 second-foot Aug. 30, 1925, Sept. 4, 1926, Sept. 6, 1928, July 22-26, Aug. 4, 5, 8-14, 1929. Remarks.- Several diversions from tributary streams in Temecula Valley, and some diver- sions by pumping above station. Records furnished by Santa Margarita ranch. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 7.5 9 11 13 30 3,890 92 52 17 13 8.5 9 2 8 9 12 14 23 12,000 92 45 17 13 9 S.5 3 8.5 10 12 14 20 10,400 90 43 16 13 9.5 8 4 8 10 11 13 48 2,000 80 41 14 12 11 8.5 5 8 10 11 14 30 1,000 79 38 14 12 11 9 6 8 11 11 15 21 700 76 34 14 12 11 9 7 8 11 11 14 20 400 68 30 13 12 11 9.5 8 7.5 10 11 14 22 450 66 28 13 13 10 9.5 9 7 10 12 13 40 360 70 28 20 13 10 9 10 7 10 14 13 43 320 64 26 20 13 10 9 11 6.5 10 15 13 80 300 65 28 17 13 10 9 12 7 10 22 13 88 2,140 66 28 16 13 10 9 IS 6.5 10 17 13 45 950 120 32 14 13 10 9 14 7 10 14 14 30 500 88 31 16 13 9.5 9 16 7.5 10 13 18 26 450 70 31 15 12 9.5 11 16 8 10 IS 17 22 365 54 34 15 12 10 10 17 7.5 11 12 17 20 300 54 38 15 12 10 11 18 7 11 11 18 22 270 46 38 16 12 10 10 19 7 10 11 20 30 240 45 33 16 12 9.5 9.5 20 7 10 11 21 20 200 44 31 15 12 10 9.5 21 7 10 12 17 15 165 50 30 14 13 9.5 8.5 ~2 7 10 12 16 15 155 43 27 14 12 9.5 9.5 23 7.5 10 21 14 15 150 40 22 14 12 10 9.5 24 7.5 11 19 13 15 145 37 18 14 12 9 9 25 7.5 11 17 12 14 140 55 14 13 11 8.5 9 26 8 11 25 13 13 135 45 19 13 10 8.5 9.5 27 8.5 10 21 14 156 130 37 20 11 10 9 10 28 8.5 10 21 15 580 125 45 19 12 10 12 9.5 29 9 10 15 21 _ 125 50 16 13 9 11 9.5 30 9 11 15 17 _ 113 100 19 14 8.5 10 9.5 31 9 15 16 - 110 - 17 - 8.5 8.5 ~ Second- Run-off in IbitylTnvpffl Minimum Mean Month foot-days acre-feet October ...... 237.0 9 6.5 7.65 470 306.0 11 g 10.2 607 448.0 25 11 14.5 889 Calendar year 1937...... 37,702.1 4,730 4.4 103 74,780 469 21 12 15.1 930 February...... 1,503 580 13 53.7 2,980 38,728 12,000 110 1,249 76,820 April ...... 1,931 120 37 64.4 3,830 to...... 910 52 14 29.4 1,800 445 20 11 14.8 883 July...... 366.0 13 8 . 5 11.8 726 305.0 12 8.5 9.84 605 279.5 11 8 9.32 554 Water year 1937-38...... 45,927.5 12,000 6.5 126 91,090 SANTA MARGARITA RIVER BASIN 29 Santa Margarita River at Ysidora, Calif. Location.- Water-stage recorder, lat. 33°14'40", long. 117°22'50", in Santa Margarita y Las Flores grant, about 2 miles upstream from mouth and one mile downstream from Ysidora, San Diego County. Altitude, about 15 feet. Drainage area.- 740 square miles. Records available.- February 1923 to September 1929 and October 1930 to September 1938. Average discharge.- 10 years (1927-29, 1930-38), 44.8 second-feet. Extremes.- Maximum discharge during year, 31,000 second-feet (estimated) Mar. 3 (gage heigM, 12.70 feet); no flow Oct. 1-7 and July 16, 19, 20, and July 22 to Sept. 30. 1923-29, 1930-38: Maximum discharge, 33,600 second-feet (estimated) Feb. 16, 1927; no flow during part of most years. Remarks.- Records poor. Considerable water diverted above station for irrigation on the Pauba and Santa Margarita ranches. (See p. 31 for records of O'Neill ditch near Ysidora). Records furnished by Santa Margarita Ranch. Discharge, In second-feet, water year October 1937 to September 1938 Day Oot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0.5 1.7 16 44 6,270 125 90 20 2.3 Z. 0 .5 1.3 16 48 13,000 117 75 20 1.9 3 0 .6 1.2 16 35 15,500 111 65 20 1.5 4 0 .6 1.7 16 51 3,000 107 56 18 1.5 5 0 .6 2.1 15 66 1,600 104 52 18 1.9 6 0 .6 2.5 15 43 1,300 101 48 18 1.0 7 0 .6 2.8 15 35 840 100 45 20 1.3 8 .3 .5 3.0 16 33 900 98 42 18 .3 9 .4 .5 3.2 15 35 550 96 39 13 .8 10 .5 .4 3.6 14 60 390 94 38 9 .8 11 .8 .4 5.5 14 80 350 92 37 8 .4 IS .7 .4 7 15 240 2,600 90 36 5 .3 13 .6 .4 10 15 100 1,600 125 36 3 .4 14 .5 .4 15 14 80 950 135 36 5 .1 15 .5 .6 10 20 70 690 104 36 7 .1 16 .5 .8 6 22 50 550 88 46 5 0 17 .5 .8 10 19 43 450 83 56 4 .1 18 .5 .6 12 21 36 340 79 56 8 .1 19 1.5 .8 12 22 30 330 76 54 6 0 80 1.5 .8 11 29 65 300 74 52 5.5 0 81 1.5 .8 11 22 50 235 70 48 3.4 .1 22 .4 .9 15 18 40 220 60 44 3.1 0 23 .3 .9 24 18 36 210 77 40 3.6 0 24 .3 .9 23 17 34 205 66 36 4.8 0 85 .4 .9 21 14 30 190 80 33 2.4 0 86 .6 .9 25 12 28 170 80 30 1.9 0 87 .6 .9 27 11 200 200 65 28 2.3 0 88 .6 1.0 22 15 975 205 55 26 2.1 0 89 .4 1.0 19 22 190 60 24 1.6 0 30 .3 1.0 18 33 160 80 25 1.5 0 31 .5 18 22 130 22 0 Second- Run-off In Month foot-days MflTf^yi^l Minimum Mean acre-feet Oot 19.9 1.5 0 0.64 39 HOT 21.0 1.0 .4 .70 42 Dee 344.6 27 1.2 11.1 664 Calendar year 193 56,431.8 10,200 0 155 111,900 Jan 549 33 11 17.7 1,090 Feb 2,637 975 28 94.2 5,230 Mar 53,625 15,500 130 1,730 106,400 Apr 11...... 2,692 135 55 89.7 5,340 May 1,351 90 43.6 2,680 Jim 2,572 20 1.5 8.57 510 Jul 14.9 2.3 0 .48 30 Aug 0 0 0 0 0 Sep 0 0 0 0 0 *ater year!937-3E 61,511.6 15,500 0 169 122,000 30 SANTA MARGARITA RIVER BASIN Murrieta Creek at Temecula, Calif. Location.- Water-stage recorder, lat. 33°29'00", long. 117°08'50", in Temecula grant, 100 feet above junction with Temecula Creek and 1 mile south of Temecula, Riverside County. Altitude, about 1,050 feet. Drainage area.- 220 square miles. Records available.- October 1930 to September 1938. Extremes.- Maximum discharge'during year, 16,800 second-feet (estimated) Mar. 2 (gage height, 8.7 feet); minimum, 0.7 second-foot Oct. 1-2, 9-15, Aug. 27, Sept. 14-15, 20. 1930-38: Maximum discharge that of Mar. 2, 1938; minimum, 0.2 second-foot at times during 1931, 1933, 1934, and 1935. Remarks.- Records furnished by Santa Margarita ranch. Discharge, In second-feet, water year October 1937 to September 1938 Day Oot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.7 0.9 1.0 1.2 5 1,670 11 5 1.5 1.1 0.8 0.8 2 .7 .9 1.1 1.2 4.0 7,200 9 4.7 1.5 1.1 .8 .8 3 .8 .9 1.1 1.2 2.8 3,200 S.5 4.1 1.5 1.1 .8 .8 4 .8 .9 1.1 1.2 1 6 360 e 3.5 1.4 1.1 .8 *.8 5 .8 1.0 1.1 1.2 4.7 120 7.5 3.2 1.4 1.1 .8 *.8 6 .8 1.0 1.1 1.2 2.8 83 7.5 3.1 1.3 1.1 .8 .8 7 .8 1.0 1.1 1.2 2.4 62 6.5 2.6 1.3 1.1 .8 .8 8 .8 1.0 1.1 1.2 2.3 85 5.5 £ 3 1.3 1.0 .9 .8 9 .7 54 5.5 2.2 1.4 1.0 .8 .8 10 .7 1.0 1.2 1.2 8 40 5.5 2.2 1.4 1.0 .8 .8 11 .7 1.0 1.3 1.2 21 33 5 2,1 1..4 1.0 .8 .8 12 .7 1.0 1.9 1.2 24 950 5.5 2.0 1.4 1.0 .8 .8 13 .7 1.0 1.5 1.2 8 250 7.5 1.9 1.4 .9 .9 .8 14 .7 1.0 1.2 1.2 4.6 105 6.5 1.9 1.4 .9 .9 .7 15 .7 1.0 1.1 1.7 3.9 71 5.5 1.9 1.4 .9 .9 .7 16 .8 1.0 1.1 1.7 3.8 48 5 2.1 1.3 .9 .9 .8 17 .8 1.0 1.1 1.5 3.5 45 4.9 2.4 1.2 .9 .9 .8 18 .8 1.0 1.1 .4 3.5 39 4.5 2.2 1.2 .9 .9 .8 19 .8 1.0 1.1 .7 6.5 29 4.1 2.1 1.2 .9 .9 .8 20 .8 1.0 1.0 .0 4.6 25 4.0 2.1 1.2 .9 .9 .7 21 .8 1.0 1.0 .7 3.5 22 4.1 2.1 1.3 .9 .9 .8 22 .8 1.0 1.0 .4 3.4 20 4.0 2.1 1.2 .9 .9 .8 23 .8 1.0 1.6 .3 3.2 19 3.S 1.9 1.2 .9 .8 .9 24 .8 1.0 1.8 .2 3.2 17 3.8 1.8 1.2 .9 .8 .8 25 .8 1.0 1.4 1.2 3.0 17 5 1.7 1.2 .9 .8 .8 26 .8 1.0 1.6 1.2 3.0 16 4.5 1.7 1.1 .9 .8 .8 27 .8 1.0 1.7 1.2 68 15 4.1 1.9 1.1 .9 .7 .8 28 .9 1.0 1.4 1.5 320 13 3.8 1.9 1.1 .8 .8 .8 29 .9 1.0 1.3 2.6 14 3.7 1.8 1.1 .8 .8 .8 30 .8 1.0 1.2 2.2 14 5 1.7 1.1 .9 .8 .8 31 .9 1.2 1.7 13 1.6 .8 .8 Seoond- MBIT^ I*1 !1 IMnlnqqn Run-off In Month foot-daya Mean aore-feet Dot 24.2 0.9 0.7 0.78 48 No? 29,6 1.0 .9 1.00 59 Deo 38.6 1.9 1.0 1.25 77 Calendar year 1937...... 9,622.6 1,800 .5 26.4 19,080 Jan 44.0 2.6 1.2 1.42 87 Feb 535.7 320 2.3 19.1 1,060 Mar 14,849 7,200 13 479 29,450 Apr 168.8 ' 11 3.7 5.63 335 f87 73.8 5 1.6 2.38 146 Jim 38 V 1.5 1.1 1.29 77 Jul 29\ 5 1.1 .8 .95 59 Aue 25.8 .9 .7 .83 51 Sep 23.8 .9 .7 .79 47 water year 1937-3 15,881.5 7,200 .7 43.5 31,500 Estimated. SANTA MARGARITA RIVER BASIN ' O'Neill ditch near Ysidora, Calif. Location.- Water-stage recorder, lat. 33°19'40", long. 117°19'45", 100 feet upstream from discharge into O'Neill Reservoir and 6 miles northeast of Ysidora. Records available.- October 1930 to September 1938. Remarks.- Records furnished by Santa Margarita ranch. This ditch diverts water from Santa Margarita River. Discharge, In second-feet, water year October 195V to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Sept. 1 5.8 7.8 10.5 0 11.6 6.4 6.7 2 6.3 7.8 10.9 0 11.0 5.9 6.4 3 6.8 8.2 10.9 0 10.4 5.9 6.5 4 6.7 8.6 10.7 0 10.2 5.9 6.2 6 6.6 8.6 10.1 0 10.0 6.0 6.8 6 6.6 9.4 10.0 0 10.2 6.3 7.0 7 6.3 10.5 10.1 0 10.6 6.0 7.2 8 6.0 9.4 10.5 3.8 10.4 6.3 7.7 9 5.4 8.6 11.4 21 9.8 6.1 7.9 10 5.0 8.6 14.6 24 9.8 6.0 7.9 11 5.0 9.2 15.8 24 9.6 6.0 7.6 12 5.0 9.4 15.4 22 9.4 6.3 7.0 13 5.1 9.7 10.0 19.6 9.2 6.3 6.9 14 5.4 9.4 8.2 17.3 8.7 6.3 6.8 16 6.1 9.2 4.2 17.8 8.1 6.5 7.3 16 6.6 9.2 0 17.8 7.8 7.4 7.0 17 6.6 9.9 0 16.8 7.6 9.4 7.1 18 5.9 10.1 0 15.8 6.8 10.5 8.1 19 5.7 9.7 0 15.8 6.5 8.5 7.8 20 5.8 8.9 0 17-3 6.2 8.1 6.7 21 6.1 9 *2 0 15.8 8.0 8.3 6.4 22 6.1 9\2 0 14.4 7.6 7.0 6.6 23 6.3 9.3 0 13.6 7.3 6.5 7.1 24 6.4 10.0 0 13.2 7.4 6.4 7.0 25 6.5 10.5 0 12.5 6.7 6.5 7.2 26 6.8 10.5 0 11.6 6.5 6.0 7.2 27 7.2 10.2 0 10.9 6.1 6.0 7.7 28 7.3 9.7 0 11.1 5.7 6.8 7.7 29 7.5 10.1 0 12.0 5.8 8.4 7.5 SO 7.9 10.5 0 11.6 6.5 7.3 7.1 31 7-7 - 0 6.5 6.7 Seoond- IHiT^pTinH Run-off in Month foot-days ^mrlimiHi Hean acre-feet 194.5 7.9 5.0 6.27 386 281.4 10.5 7.8 9.38 558 163.3 15.8 0 5.27 324 1,797.3 35 0 4.92 3,570 0 0 0 0 0 0 0 0 0 0 March...... 0 0 0 0 0 April...... 0 0 0 0 0 May...... 0 0 0 0 0 359.7 24 0 12*0 713 «Q July...... 258.0 11.6 5*7 8 G<5 512 212 »0 10.5 5.9 6 «84 420 214)1 8.1 6.2 7.14 425 Water year 1937-3 3...... 1,683.0 24 0 4.61 3,340 32 SAN JUAN CREEK BASIN San Juan Creek near San Juan Capistrano, Calif. Location.- Water-stage recorder, lat. 33°30'50", long. 117°37'40", in Mission Viejo grant on Ortego State Highway bridge, 2i miles east of San Juan Capistrano, Orange County. Altitude, about 150 feet. Drainage area.- 110 square miles. Records available.- October 1928 to September 1938. Extremes.- Maximum discharge during year, 13,000 second-feet Mar. 2, by slope-area method, determined by Corps of Engineers, U. S. Army; no flow at times during October and November. 1929-38: Maximum discharge, that of Mar. 2, 1938; no flow at times during most summers. Remarks.- Records fair except those for period Feb. 28 to Mar. 11, which are poor. Dis- charge computed on basis of 108 discharge measurements and records for Trabuco and Santiago Creeks. Results of many discharge measurements furnished by Santa Kargarlta ranch. Discharge, In second-feet, water year October 1937 to September 1933 Day Oot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 18 550 77 43 13 6 3.0 1.6 2 10 4,100 74 41 14 6 3.0 1.6 3 10 3,400 71 39 15 6 3.3 1.6 4 14 1,000 68 37 12 6.5 3.7 1.7 5 9 600 67 37 11 6.5 3.1 1.7 6 9 410 63 36 10 6.5 2.6 1.7 7 3.5 9 315 61 28 10 6.5 2.8 1.7 S *0.8 8.5 265 54 28 12 6 3.0 1.7 9 8.5 265 53 27 13 6 3.1 1.7 10 6.5 225 52 26 13 5.5 3.1 1.6 11 11 1S8 51 25 12 4.8 3.2 1.5 12 47 600 50 25 11 4.3 2.8 1.5 13 0.4 15 540 50 25 11 4.4 2.6 1.4 14 10 480 50 22 10 4.5 2.4 1.4 15 3.3 8.5 410 50 23 9.5 4.2 2.4 1.4 16 3.7 S 330 47 24 9 4.0 2.6 1.4 17 *1.3 4.0 7 230 44 25 8.5 3.7 2.6 1.4 IS 4.2 7.5 195 41 25 8.5 3.4 2.8 1.5 19 4.4 7.5 183 38 25 8 3.0 2.6 1.5 20 4.2 7 175 39 25 8 3.2 2.6 1.6 21 3.9 7.5 170 41 23 8 3.4 2.6 1.4 22 3.9 8 160 37 21 7.5 3.3 2.6 1.2 23 3.9 8 150 38 19 7.5 3.2 2.6 1.2 24 3.9 8 139 39 18 7 3.2 2.3 1.2 25 3.7 8 115 41 17 7 3.2 1.9 1.3 26 3.5 8 115 43 16 6.5 3.3 2.1 1.4 27 *4.3 3.5 10 112 44 15 6.5 3.0 2.2 1.5 28 3.7 41 115 45 12 6 2.6 2.2 1.2 29 3.9 90 46 12 6 2.8 2.1 1.0 50 3.9 85 46 12 6 3.0 2.1 1.0 31 3.7 80 12 3.0 1.8 Second- Run-off In Month foot-days M^yljftflq Minimum Mean acre-feet Oot 31 0 1.0 60 HOT 45 : 0 1.5 90 Dec 77.5 2.5 154 C 22,395.5 3,200 0 61.4 44, 420 January 114.3 44 3.3 3.69 227 Fob 331.5 47 7 11.8 660 Mar 15,792 4,100 80 509 31.320 Apr 1,520 77 37 50.7 3,010 May 763 43 12 24.6 1,510 Jim 286.5 15 6 9.55 570 Jul 135.0 6.5 2.6 4.35 270 Aug 81.8 3.7 1.8 2.64 160 Sep 43.6 1.7 1.0 1.45 86 n ater year 1937-38...... 19,221.2 4,100 0 52.7 38, 100 Discharge measurements. SAN JUAN CREEK BASIN 33 Trabuco Creek near San Juan Caplstrano, Calif. Location.- Water-stage recorder, lat. 33°31'30", long. 117°40'15", In SWi sec. 25, T. 7 s., R. 8 W., on State Highway bridge, 14 miles north of San Juan Caplstrano. Drainage area.- 36.5 square miles. Records available.- October 1930 to September 1938. Extremes of Discharge.- Maximum discharge during year, 4,400 second-feet Mar. 2 (gage height, 7.50 feet); no flow during part of year. 1930-38: Maximum discharge, 9,240 second-feet Feb. 6, 1937 (gage height, 6.80 feet), by slope-area method; no flow during part of each year. Remarks.- Records furnished by Orange County Flood Control District, through M. N. Thompson, chief engineer. Discharge, In second-feet, water Tear October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. *"7 June July Aug. Sept. 1 0.1 254 32 22 2.7 1.0 0.1 2 0 1,460 30 16 2.5 1.1 .1 3 .1 *620 29 15 2.4 1.2 .1 4 0 *331 27 14 2.3 1.2 .1 e 0 *245 26 15 2.2 1.2 .1 6 0 *195 24 14 2.1 1.2 .1 7 0 *156 23 9.5 2.0 1.1 .1 a 0 113 22 9 1.9 .9 .1 9 0 92 21 8.5 l.S .8 .1 10 0 65 20 7.5 1.8 .6 .1 u .1 79 19 *7.5 1.7 .5 .1 IS 15 215 18 *6.5 1.7 .3 .1 13 4.0 211 17 «6.5 1.6 .1 .1 li 0 162 16 *6.5 1.5 .2 .1 16 0 169 15 *6.5 1.4 .2 ,.1 16 0 152 14 7 1.4 .2 .1 17 0 138 14 7.5 1.3 .2 .1 IS 0 115 13 e 1.3 .2 .1 19 0 103 12 7.5 1.2 .2 .1 SO 0 92 11 7 1.2 .2 .1 21 0 76 10 6.5 1.1 .2 0 28 0 64 10 6 1.0 .2 0 2S 0 56 10 5.5 1.0 .2 0 24 0 54 10 5 1.0 .2 0 25 0 51 27 4.6 1.0 .2 0 26 0 47 19 4.1 1.0 .2 0 27 0 44 12 3.9 1.0 .2 0 28 15 40 11 3.6 .9 .2 0 29 33 12 3.4 .9 .2 0 SO 34 22 3.1 .9 .1 0 ai - 33 2.9 .1 0 Second- MfljC Aliso Creek at El Toro, Calif. Location.- Water-stage recorder, lat. 33°37'15", long. 117°41'20", In Canada de Los Allsos grant, on Second Street bridge, at El Toro, Orange County. Altitude, 440 feet. Drainage area.- 8.5 square miles. Records available.- October 1930 to September 1938. Extremes.- Maximum discharge during year, 1,280 second-feet War. 2 (gage height, 10.3 feet); no flow for several months. 1930-38: Maximum discharge, 1,950 second-feet Feb. 6, 1937; no flow during most of each year. Remarks.- Records furnished by Orange County Flood Control District, through M. N. Thompson, chief engineer. Discharge, In secend-feet, water year October 1937 to September 1938 Day Oct. HOT. D«o. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 9 104 0 2 0 404 0 3 .1 66 0 4 .8 15 0 6 0 7 0 6 0 *2.5 0 7 0 *1.0 0 8 0 17 0 9 8 *1.0 0 10 0 *.7 0 11 17 .2 0 12 7 46 0 13 0 26 0 14 0 *7 0 16 0 *5 0 16 0 »3.0 0 17 0 »3.0 0 18 0 *3.0 0 19 0 4.0 0 20 0 5 0 21 0 4.0 0 22 0 1.0 0 23 0 0 0 24 0 0 0 25 0 0 3.1 26 0 0 0 27 .1 0 0 28 *39 0 0 29 _ 0 0 30 _ Q 0 31 - 0 - Seoond- Run-off in Mqyf jtl^m Mean Month foot-days Minimum acre-feet October...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 943.3 521 0 2.56 1,870 Jan 0 0 0 0 0 Fet 81.0 39 0 2.69 161 Mar 726.4 404 0 23.4 1,440 April...... 3.1 3.1 0 .10 6 Hay...... 0 0 0 0 0 0 0 0 0 0 Jill 0 0 0 0 0 Aug 0 0 0 0 0 Sep 0 0 0 0 0 Water year 1937-2 8...... 809.5 404 0 2.22 1,610 it-Discharge estimated. SANTA ANA RIVER BASIN 35 Santa Ana River near Mentone, Calif. Location.- Water-stage recorder, lat. 34°06'40", long. 117°06'00", In SWi sec. 4, T. 1 S., R. 2 W., near mouth of canyon, 0.4 miles upstream from Southern California Edison Co.'s Mentone power plant and 3f miles northeast of Mentone. Altitude, about 1,900 feet. Drainage area.- 189 square miles. Records available.- July 1896 to September 1938. Average discharge.- 40 years (1896-1909, 1910-15, 1916-38), 41.9 second-feet. Average combined discharge of Santa Ana River and canals, 37 years (1896-98, 1902-15, 1916-38), 93.6 second-feet. Extremes (river only).- Maximum discharge during year, 52,300 second-feet Mar. 2, by slope-area method; minimum, 0.3 second-feet Nov. 15-24, Dec. 1-9. 1896-38: Maximum discharge, that of Mar. 2, 1938; no flow during part of 1932-36. Remarks.- Records fair except those for Mar. 2-22, which were computed on basis of rain- fall-runoff studies and records for nearby stations and are poor. Storage at Bear Valley Reservoir; diversions above station. Sum of discharge of river, of Mentone power-plant tailracs, and of Greenspot pipe line is given in table on next page. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.0 0.4 0.3 1.0 30 979 248 323 194 64 14 16 2 1.0 .6 .3 1.0 20 15, 500 250 321 194 64 14 16 3 1.0 .6 .3 1.3 31 8,080 255 326 192 63 14 15 4 1.0 .6 .3 1.3 218 2,550 266 304 191 60 13 15 6 .S .6 .3 1.0 46 1,550 271 2S2 187 ' £ 14 15 6 .6 1.0 .3 .S 12 1,000 259 280 180 63 14 14 7 .6 1.0 .3 1.0 2.7 800 250 275 157 4S 46 14 8 .4 1.0 .3 1.3 1.7 670 246 259 124 58 31 14 9 .6 .6 .3 1.5 10 600 250 239 120 SI 19 14 10 .6 .6 .6 1.7 35 550 255 242 115 50 17 13 11 .6 .6 9.5 2.0 46 500 264 253 110 47 17 13 12 .8 .6 102 2.0 133 1,240 250 253 106 53 17 13 13 .8 .6 25 2.2 43 1,970 2SO 246 102 53 24 12 14 1.0 .6 5 2.0 30 1,150 255 246 98 48 42 12 16 1.0 .3 4.8 S.5 14 760 250 250 94 48 53 12 16 1.0 .3 3.5 4.4 8.5 580 248 246 90 48 48 12 17 1.0 .3 2.7 2.2 7 480 257 246 86 52 48 12 18 1.0 .3 2.7 3.5 4.0 430 26S 244 64 51 42 13 19 .8 .3 2.7 10 22 390 330 231 81 51 38 13 20 .8 .3 4.4 5.5 11 370 379 227 79 51 35 13 21 .8 .3 4.4 3.5 4.0 355 431 219 75 46 30 13 22 .8 .3 4.4 2.4 4.0 345 440 217 72 51 25 13 23 .6 .3 6.5 2.*22.2 4.0 342 424 217 70 40 20 13 24 .8 .3 6.5 3.5 340 400 211 69 34 18 13 25 .6 .6 6.5 2.0 4.0 321 379 209 64 30 18 13 26 .6 .6 7 2.0 4.0 304 338 204 55 28 18 12 27 1.0 .6 7 2.0 49 297 352 194 59 26 IS 12 28 .6 .6 7 2.2 611 285 352 200 72 20 17 12 29 .4 .6 6 22 285 355 19S 71 18 17 12 30 .4 .6 3.5 11 _ 285 347 194 65 17 17 12 31 .6 - 1.0 9 - 253 - 196 16 17 - Seoond- MinljBiiyt Run-off In Month foot-days Maximum Mean acre-feet 23 > 6 1.0 0.4 0.76 47 16.0 1.0 .3 .53 32 Deoeniber. . . 225 4 102 .3 447 53, 640 2,610 .3 147 106, 390 114.7 22.0 8 3.7 £23 1,413.4 63-1 1.7 50.5 2,800 March...... 43,561 15, 500 253 1,405 April ...... 9,149 440 246 305 is!l50 May...... 7 552 526 194 244 15,000 3, 256 194 55 109 6,460 July...... 1,437 81 16 46.4 2,350 53 13 25 1,540 396 16 12 13.2 785 Water year 1937-3 67,919.1 15.500 .3 186 134, 700 36 SANTA ANA RIVER BASIN Combined discharge, I second-feet, of Santa Ana River and Caua-io near Mentone, Calif., for water year October 1937 to September 1938 Day oot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 59 53 49 41 72 979 248 323 201 144 103 105 2 57 52 50 40 64 15,500 250 321 201 144 103 105 S 56 52 48 40 90 8,080 255 326 199 140 103 104 4 57 52 47 40 277 2,550 266 304 198 140 102 104 5 57 52 47 42 105 1,550 271 282 194 135 103 104 6 58 54 49 41 85 1,000 259 280 191 140 103 103 7 68 62 47 41 64 800 250 275 203 137 135 100 8 57 54 47 40 61 670 246 259 172 147 123 103 9 29 52 47 42 78 600 250 239 179 111 108 106 10 47 52 49 42 108 550 255 242 174 125 106 99 11 51 50 60 36 119 500 264 253 169 121 106 99 12 59 50 102 36 207 1,240 250 253 176 126 106 97 13 58 50 25 42 126 1,970 280 246 154 126 113 101 14 58 50 57 42 108 1,150 255 246 159 121 126 101 15 58 53 59 48 86 760 250 250 164 121 145 104 16 54 50 54 67 76 580 248 246 165 121 140 104 17 53 49 50 59 75 480 257 246 156 125 137 104 18 55 49 50 58 67 430 268 244 164 124 134 97 19 52 50 42 65 100 390 330 231 165 124 130 105 20 47 49 45 66 85 370 379 227 163 124 127 105 81 51 51 45 58 70 355 431 219 159 119 122 102 28 51 51 43 54 71 345 440 217 156 127 117 102 29 49 51 66 58 71 342 424 217 150 129 109 102 24 51 51 56 44 62 340 400 211 149 118 110 102 25 58 49 56 42 63 321 379 209 144 122 110 102 26 58 49 51 41 63 304 338 204 135 120 110 104 27 54 49 55 41 129 297 352 201 134 118 107 101 28 53 49 50 39 611 285 352 207 147 112 106 101 29 52 47 47 61 285 355 205 146 107 106 104 SO 52 47 44 52 _ 285 347 201 142 106 106 104 31 54 - 44 57 - 253 203 105 106 - Seoond- Run-off In Month foot-days Maximum Minimum Mean aore-feet 1,671 68 29 53.9 3,310 ffO 1,529 Ofi 47 51.0 3,030 1,581 102 25 51.0 3,140 58,159 2,610 12 159 115, 400 1,475 67 36 47.6 2,930 3,193 611 61 114 6,330 March...... 43,561 15, 500 253 1 '305405 86,400 April...... 9,149 440 246 18,150 May...... 7,587 326 201 245 15, 050 5,009 203 134 J.O1 fi»7 / 9,940 July...... 3 879 147 105 125 7» 690 s!562 145 102 115 7,070 3,074 106 97 102 6,100 Water year 1937-38...... 85,270 15, 500 25 234 169,140 SANTA ANA RIVER BASIN 37 Santa Ana River at Riverside Narrows, near Arlington, Calif. Location.- Water-stage recorder, lat. 33°58'00", long. 117026'30", in Jurupa grant, half a mile downstream from Union Pacific Railroad bridge and 3 miles north of Arlington, Riverside county. Altitude, 690 feet. Records available.- January 1929 to September 1938. Extremes.- Maximum discharge during year, 100,000 second-feet Mar. 2, by slope-area method; minimum, 21 second-feet 'July 21-23. 1929-38: Maximum discharge, that of Mar. 2, 1938; minimum, 20 eecond-feet Aug. 3, 1937. Remarks.- Records fair. Station destroyed by flood Mar. 2, 1938; rebuilt May 1, 1938. Discharge for periods May 1 to June 13, July 3, 8, 12-17, Aug. 3-7, 14, 16, Sept. 4-5, 13-18, 27-28, computed on basis of discharge measurements and records for stations near San Bernardino and Corona, several diversions above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. *»7 June July Aug. Sept. 1 25 28 2S _ »63 *3,220 *2S8 355 74 24 32 24 2 27 28 29 _ _ no 0,000 347 61 25 32 24 s 27 28 30 _ _ _ 345 49 27 32 25 4 28 27 31 _ _ _ 340 41 28 30 27 5 28 26 34 *31 - - 320 36 28 29 27 6 28 26 35 _ _ 290 34- 30 28 24 7 29 26 35 _ _ _ 260 35 31 27 27 8 2S 26 34 _ _ _ 240 37 32 27 28 9 28 26 34 _ _ _ 230 34 31 30 29 10 27 27 39 - *34 - 210 32 29 27 30 11 28 26 62 _ _ _ 195 29 27 29 31 12 27 27 58 _ _ _ 190 28 26 32 31 13 26 28 31 _ _ _ 190 27 27 29 34 14 26 28 30 _ _ _ 200 30 30 30 33 16 26 28 30 - *46 - 220 32 31 31 30 16 26 28 29 _ «29 _ 245 32 31 32 27 17 25 28 _ _ _ 255 35 28 34 25 18 25 28 _ _ _ 230 32 25 37 24 18 25 28 _ «33 _ _ 205 31 24 32 24 20 25 29 - - - 170 30 22 30 23 21 24 29 _ _ _ 145 28 21 38 25 22 25 30 _ _ _ _ 130 25 21 28 25 23 25 30 *50 _ «36 _ 125 30 21 30 25 24 26 30 _ .. 125 32 25 29 24 25 27 29 - «31 - - 115 30 27 30 29 26 28 30 _ _ _ _ 100 23 31 28 28 27 30 29 _ _ _ .. 90 29 25 24 28 28 30 28 «32 _ _ _ 74 25 30 23 28 29 30 28 _ _ _ _ 67 23 35 22 30 30 29 29 _ _ _ _ 70 23 35 22 30 31 29 - - - - 75 - 35 23 - Second- Maximum Minimum Mean Run-off In Month foot-days acre-feet 837 30 24 27.0 1,660 838 30 26 27.9 1,660 March...... April...... May...... 6,153 355 67 198 12 200 1,012 74 23 33 7 2)010 July...... 862 35 21 27 8 1,710 MS 907 OO 22 29 3 1,800 819 34 23 2?l3 1,620 Water year *Diacharge measurement. tPeak discharge, computed by slope-area method. 38 SANTA ANA RIVER BASIN Santa Ana River at Hamner Avenue, near Corona, Calif. Location.- Water-stage recorder, lat. 33°56 I 5011 , long. 117°33 ( 00", in Jurupa grant, one mile upstream from Hamner Avenue, and 5 miles north of Corona, Riverside County. Records available.- May 1930 to November 1938 (irrigation seasons only). Remarks.- Records good. Discharge for periods of faulty gage-height record, May 1, 3-8, 11-J.2, May 31 to June 3, Aug. 20, 27, Oct. 29, Nov. 1-4, 9-11, 13, 14, computed on basis of records for other stations on Santa Ana River. Discharge, in second-feet, 1937-33 Day Oct. NOT. May June July Aug. Sept. Oct. Nov. 1 18 25 355 45 28 26 17 35 39 2 20 24 349 40 26 26 21 32 40 s 20 23 350 38 30 24 16 26 41 4 18 25 340 37 32 25 18 29 42 5 18 25 315 40 28 24 23 29 43 6 18 25 290 35 29 22 23 29 37 7 20 25 260 37 26 22 26 34 35 a 20 25 240 40 29 22 23 29 40 9 18 25 221 37 32 26 25 29 46 10 21 23 184 35 28 26 25 30 47 11 21 25 180 35 34 26 26 32 47 12 22 26 179 35 37 28 20 35 47 IS 20 27 175 34 34 28 25 32 46 14 18 26 189 32 30 29 28 43 45 15 20 26 200 34 29 29 22 42 43 16 24 26 216 38 28 29 22 38 45 17 23 27 222 35 28 28 21 40 47 18 23 27 216 37 24 29 18 40 42 19 22 26 200 38 25 25 25 47 43 20 24 27 175 34 24 22 25 40 45 21 23 27 156 32 25 20 22 35 42 22 23 27 147 29 26 18 23 34 38 23 22 30 138 35 28 20 32 43 32 24 23 31 142 34 28 17 25 38 37 25 24 32 121 28 28 20 28 40 34 26 25 34 112 30 26 18 28 40 37 27 26 37 81 28 26 17 30 38 38 sa 25 36 67 29 24 21 28 32 37 29 24 33 60 28 21 22 30 34 34 30 26 34 63 24 25 16 32 37 35 31 31 55 28 15 - 38 - Second- Run-off In Month foot-days Vn-^imm Klntmum Mean aero-foot 1937 October ...... 680 31 18 21.9 1,350 329 37 23 27.6 1,640 1938 MflT 5 998 355 55 193 11,900 1*033 45 24 34 4 2,050 July...... 866 3V £1 27 9 1,720 720 29 15 23.2 1,430 Y17 32 16 23.9 1,420 1,100 47 26 35.5 2,180 1,224 47 32 40.8 2 ' 430 The peri 3d...... 23,130 SANTA ANA RIVER BASIN 39 Santa Ana River at Auburndale Bridge, near Corona, Calif. Location.- Water-stage recorder, lat. 33°55'30", long. liysS'^W", in Jurupa grant, at Aumirndale Bridge, 4 miles northwest of Corona, Riverside County. Records available.- May 1930 to November 1938 (irrigation seasons only). Remarks.- Records fair. Discharge for periods of missing or doubtful gage-height record, May 1-22, May 28 to June 5, June 10, Aug. 24, 25, Aug. 29 to Sept. 1, Sept. 27-30, Oct. 4 to Nov. 30, computed on basis of discharge measurements and records for stations at Hamner Avenue and near Prado. Discharge, In second-feet, 1937-38 Day Got. HOT. May June July Aug. Sept. Oct. Nov. 1 33 47 405 65 46 30 36 45 60 2 29 42 365 81 45 30 36 45 60 S 35 42 365 74 45 28 40 42 58 4 32 47 365 69 50 32 38 50 58 5 32 43 345 64 47 34 40 50 56 6 32 47 315 60 47 55 42 52 56 7 30 47 290 58 42 28 40 52 55 8 29 47 285 5S 58 32 36 52 58 9 27 45 270 67 38 32 40 51 60 10 30 40 240 55 36 32 42 50 62 11 32 42 215 61 34 32 42 52 65 12 27 43 210 58 30 30 40 55 68 13 27 40 212 50 30 32 42 58 72 14 32 47 220 47 34 32 42 61 74 16 33 45 235 50 30 32 38 53 74 16 35 45 270 50 26 28 40 61 76 17 38 45 275 50 30 34 40 65 76 18 35 43 252 55 34 36 40 65 78 19 37 45 225 55 30 34 40 64 78 20 38 43 195 47 30 32 42 63 76 £L 38 45 166 47 34 38 42 61 75 22 38 45 142 45 36 32 45 61 76 23 37 45 133 45 36 38 45 59 77 24 38 45 140 42 34 34 45 57 78 25 37 53 126 42 34 32 47 55 78 26 40 56 119 45 38 32 50 59 78 27 37 56 102 42 32 34 50 69 76 28 43 58 86 42 34 38 47 61 75 29 45 54 74 42 30 38 47 60 74 SO 45 54 75 47 26 38 47 58 73 31 49 84 30 38 - 57 - Second- Run-off In Month f cot-days Mnirlimm MinijBUBi Xean acre-feet 1937 1,090 49 27 35.2 2,160 1,396 58 40 46.5 2,770 1938 May ...... 6,801 406 74 219 13,490 If 633 85 42 54.4 3,240 July...... 1,105 60 CDpe 35.6 2 190 1,028 38 28 33.2 2^040 1,261 60 36 42.0 2,500 1 739 65 42 56.1 3,450 2,080 78 55 69.3 4,130 The period...... 31,040 40 SANTA ANA RIVER BASIN Santa Ana River at Atchison, Topeka & Santa Fe Railway Bridge, near Prado, Calir. Location.- Water-stage recorder, lat. 33°52 I 50", long. 117°38'30", In La Sierra grant, hair a mile downstream from Atchison, Topeka & Santa Fe Railway bridge and 1J miles southwest of Prado, Riverside County. Records available.- Jfey 1930 to November 1938 (irrigation seasons only). Remarks.- Records fair. Discharge for periods or faulty gage-height record, May 1-28, J^y 31 to June 5, June 11, 12, 17-19, July 7-11, July 27 to Aug. 5, Aug. 10, 12, Aug. 23. to Sept. 2, Sept. 5, Sept. 20-23, and Sept. 29 to Nov. 30, computed on basis of discharge measurements and records Tor other stations on Santa Ana River. Flow may have been reduced or regulated by pumping during railroad construction in September, October, and November. Discharge, in second-feet, 1937-38 Day Oct. HOT. May June July Aug. Sept. Oct. NOT. 1 45 65 405 90 71 44 47 58 84 2 47 64 372 87 71 45 47 60 84 a 49 65 366 85 71 45 47 65 85 4 49 69 380 80 71 46 44 64 80 S 49 69 365 70 71 46 43 65 76 6 49 69 355 68 71 47 42 65 75 7 49 67 332 68 69 47 44 68 75 8 48 65 302 74 68 47 50 68 80 9 47 67 266 74 67 50 57 68 90 10 47 65 248 74 66 51 57 68 94 11 48 62 228 72 66 52 57 67 94 18 49 64 210 71 65 52 60 68 95 13 48 65 208 74 65 52 54 70 92 14 45 67 230 71 65 50 52 75 96 16 49 69 265 74 63 54 50 73 94 16 54 69 285 74 57 54 47 72 92 17 54 69 290 74 57 54 47 72 90 18 55 69 270 74 54 54 50 75 88 19 52 67 245 74 54 52 47 75 90 20 52 69 205 71 54 50 47 75 90 81 55 69 180 65 57 47 48 72 90 22 51 69 160 65 57 44 48 71 89 23 52 65 145 71 57 44 49 71 89 84 52 67 145 71 52 45 50 74 90 85 55 67 135 68 52 45 54 78 90 86 58 70 122 68 52 46 52 82 91 27 60 73 110 68 54 46 52 84 91 88 61 72 94 68 56 47 52 84 92 29 61 72 84 68 52 47 54 83 93 50 62 69 80 68 47 47 56 83 93 91 67 - 91 44 47 - 82 - Seoond- Run-Off In Month foot-daya Maxima Minimum Mean aore-feet 1937 October...... 1, 6"*.9 67 45 52*2 3,210 November...... 2,028 73 62 67 6 4,020 1938 0^*1 Bay...... 7 173 405 80 The pericKi...... 37,980 SANTA ANA RIVER BASIN 41 Santa Ana River near Prado, Calif. Location^- Water-stage recorder, lat. 33°52'05", long. 117°40'20", In Lomas de Santiago grantT at Riverside-Orange County line, In lower Santa Ana canyon, 3 miles downstream from Rlncon bridge and 3 miles southwest of Prado, Riverside County. Altitude, about 400 feet. Records available.- January 1919 to September 1938. Average discharge.- 18 years (1919-37), 142 second-feet. Extremes.- Maximum gage height during year, 17.32 feet Mar. 3, from floodmarks In gage weTTTfigure of maximum discharge not determined pending further study): minimum dis charge, 38 second-feet Oct. 1, 13, and 14. 1919-38: Maximum gage height, that of Mar. 3, 1938; minimum discharge, 25 second- feet Aug. 18, 1929, and Aug. 24, 1936. Remarks.- Records fair except those for Mar. 2-20, which are poor, Diversions and regula- tlon "above station. Dlseharge, In second-feet, water year October 1937 to September 1938 Day Got. HOT. Dee. Jan. Feb. Mar. Apr. *»y June July Aug. Sept. 1 36 57 72 95 186 1,750 326 «410 92 62 45 56 8 41 55 72 93 146 (t) 290 376 90 66 45 55 5 41 54 72 90 130 (t) 295 369 88 66 47 «51 4 41 60 69 86 170 »4,480 290 382 83 64 47 »50 5 41 58 70 88 144 «1,900 302 369 70 6S 50 »4S 6 41 57 69 66 110 »1,260 326 «360 68 68 50 47 7 41 57 67 86 108 *1,020 295 *335 72 66 47 47 3 40 55 65 83 106 780 235 *300 76 66 47 50 9 39 57 69 79 162 *570 199 *265 81 64 47 53 10 40 57 84 76 196 *440 224 «245 SI 62 50 «62 11 40 52 90 76 196 *400 240 230 81 «61 53 *50 12 40 54 132 73 324 »3,020 272 214 72 »59 47 50 13 38 55 99 74 180 »5,210 302 214 72 *57 47 47 14 38 55 81 74 149 »3,500 290 240 74 *56 47 47 15 41 60 78 88 141 «2,800 313 *270 76 »55 53 53 16 45 68 81 106 132 1,100 302 *295 78 *54 »54 50 17 47 60 78 90 128 »1,300 277 295 76 53 «54 50 IS 49 68 78 86 128 *1,300 272 284 72 *52 55 47 19 45 58 78 92 146 «890 302 256 70 »56 55 47 20 47 68 73 93 132 «610 350 *215 66 «60 *62 65 sa 47 60 73 86 128 *480 395 *190 66 64 *48 50 88 47 60 79 81 125 *430 456 *165 70 60 45 55 85 47 68 86 79 125 *410 485 *150 72 60 45 «6S 84 48 60 90 74 125 *410 522 *150 72 54 47 *50 85 48 62 90 73 118 *420 616 *140 68 63 63 «48 86 51 66 101 74 118 *410 529 *125 62 54 *53 47 87 52 72 108 79 176 *410 420 *115 64 *57 *54 47 88 54 72 105 84 345 *400 «400 *100 62 *89 »54 50 89 54 72 101 110 *380 *390 «87 64 «56 *52 61 SO 55 70 95 110 _ 470 413 «85 64 *52 «62 68 51 60 - 99 103 - 450 97 «48 «53 Seoond- Run-off In Month foot-days ItffrytflPiyi Minimum Mean aore-feet 1,396 60 38 45.0 2,770 1,786 72 52 59.5 3,540 December...... 2,604 132 65 S4.0 5,160 58,005 7,720 29 159 115,040 2,669 110 73 86*1 5,290 4 *_373 345 106 156 8^670 March...... 400 April...... 1U 328 616 199 344 20 490 toy...... 7,328 410 85 236 14^530 2,202 92 62 73 4 4,370 July...... 1*832 68 48 59)1 3,630 If £48 55 45 49.9 3,070 1,519 61 47 50.6 3,010 Water year 1937-38...... - - 38 - - flGige height missing or doubtful! discharge computed on basis of discharge measurements and records for other stations on Santa Ana River. fFigures of daily discharge for period of extraordinarily high flood withheld pending further study. 160262 C 42 SANTA ANA RIVER BASIN Santa Ana River at Santa Ana, Calif. Location.- Water-stage recorder and concrete weir control, lat. 33°45'00", long, 117°54'20", In Las Bolsas grant, one-eighth of a mile above Fifth Street Bridge In Santa Ana, Orange County, and 2 miles downstream from mouth of Santiago Creek. Altitude, about 80 feet. Control partly destroyed on Mar. 3. Records available.- January 1923 to September 1938. Average discharge.- 15 years, 25.9 second-feet. Extremes.- Maximum discharge during year, 46,300 second-feet Mar. 3 (gage height, 10.20 reet;, by slope-area method; no flow for several months. 1923-38: Maximum discharge, that of Mar. 3, 1938; no flow for several months each year. Remarks.- Records fair except those for flood period, Mar. 3-6, which are poor. Discharge ror periods of missing gage heights, Feb. 15-16, Mar. 3-6, and Mar. 17 to May 20 com puted on basis of discharge measurements and records for Santa Ana River near Prado and Santiago Creek at Santa Ana. During irrigation season two canals, that of Anaheim Union Water Co. and that of Santa Ana Valley Irrigation Co., divert entire flow of river near Olive, at points about 22 miles and about 26 miles above station,respective ly. Flow also regulated by storage and other diversions. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. *7 June July Aug. Sept. 1 0 14 991 57 23 2- 0 0 6,590 52 20 5 0 0 20,300 51 17 4 0 0 5,070 52 15 6 0 0 2,100 53 13 6 0 0 1,500 54 11 7 0 0 1,370 54 9 8 0 0 920 53 6 9 0 87 470 63 5 10 0 6 300 68 3.0 11 0 32 250 71 2.0 12 0 82 2,700 70 1.5 IS 0 15 5,710 68 1.5 14 0 1.7 3,660 64 1.5 16 0 .3 2,770 60 2.0 16 0 .2 1,020 56 10 17 0 .1 1,200 62 2.0 18 0 3.0 1,100 45 1.0 19 0 30 700 41 .6 20 0 28 400 39 .2 21 0 10 350 37 0 22 0 0 200 36 0 23 0 0 180 34 0 24 0 0 170 33 0 25 0 1.0 170 31 0 26 0 .2 160 30 0 27 0 23 150 29 0 28 0 74 140 28 0 29 5 110 27 0 SO 3.4 _ 80 25 0 31 1.0 - 60 0 Seoond- Run-off in Month foot-days Maxn Mlnimm Mean acre-feet 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 21,379.9 6,300 0 58.6 42,410 Jan 9.4 e.o 0 .30 19 Feb 407.5 87 0 14,6 808 March.. I...... 62,891 20,300 60 2,029 124,700 Aprl 1 ...... 1,423 71 SS 47.4 2,620 May...... 144.2 23 0 4.65 0 0 0 0 0 July...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Water year 1937-3£...... 64,875.1 20,300 0 178 128,600 SANTA ANA RIVER BASIN 43 Southern California Edison Co.'s canal and Greenspot pipe line near Mentone, Calif. Location.- At Southern California Edison Co.'s power plant at mouth of canyon, lat. 34°06'20", long. 117°05'55", in SWi sec. 4, T. 1 S., R. 2 w., 3 miles northeast of Mentone. Records available.- 1896 to September 1938. Average discharge.- Southern California Edison Co.'s canal, 36 years (1896-9S, 1904-38), buT* second-reet. Greenspot pipe line, 27 years (1911-38), 5.60 second-feet. Extremes.- 1896-1938: Maximum daily discharge of canal, 97 second-feet Mar. 16, 1905; no now during short periods in nearly every year. Remarks.- Intake of this canal is in sec. 34, T. 1 N., R. 2 W., at Southern California iidison Co.'s power plant 2, which is 2f miles above the Mentone plant. Water is di verted from forebay of Mentone plant by Greenspot pipe line. Discharge of canal be low forebay is computed from record of output of power plant in kilowatts; discharge of pipe-line is computed from record of weir at forebay. Total flow of canal above forebay is sum of Its discharge below forebay and discharge of pipe line. Discharge, in second-feet, of Southern California Edison Co.'s canal near Hentone, Calif., for water year October 1937 to September 193S Day Got. HOT. Dec. Jan. P«b. Ear. Apr. May June July Aug» Sept. 1 50 44 43 33 35 0 0 71 80 SO 2 47 42 43 32 37 0 0 71 80 80 3 46 42 41 32 52 0 0 6S 80 80 4 47 42 40 32 52 0 0 71 80 80 6 47 42 40 34 52 0 0 66 SO 80 6 48 44 42 33 66 0 3.7 68 80 80 7 58 52 40 33 54 0 37 80 BO 77 8 48 44 40 33 52 0 39 80 83 80 9 19.2 42 40 33 61 0 50 21 80 83 10 37 42 41 33 66 0 50 66 80 77 11 41 40 44 27 66 0 50 65 80 77 12 49 40 0 27 67 0 61 64 80 75 13 48 40 0 33 71 0 43 64 80 SO 14 48 40 45 33 71 0 52 64 75 80 16 48 44 47 32 65 0 61 64 83 83 16 44 41 44 56 61 0 66 64 83 S3 17 43 40 40 50 61 0 61 64 80 83 18 43 40 40 48 56 0 71 64 83 75 19 42 42 32 48 71 0 75 64 83 83 20 37 42 34 54 67 0 75 64 83 83 21 41 44 34 48 59 0 75 64 83 80 22 41 44 32 45 60 0 75 67 83 80 23 39 44 53 49 60 .1 71 80 80 80 24 41 44 42 35 52 .1 71 75 83 80 25 48 41 42 33 52 .1 71 83 83 80 26 48 41 37 32 52 .1 71 83 83 83 27 44 41 41 32 73 0 66 83 80 80 28 43 41 36 30 0 0 66 83 80 80 29 43 39 34 32 _ 0 66 80 80 83 30 43 40 34 34 _ 0 68 80 80 83 31 44 36 41 - 0 80 80 Seoond- Run-off In Month foot-days iiq^jfflfln Minimum Mean acre-feet October...... 1,365.2 50 19.2 44.0 2,710 1,264 52 39 42.1 2,510 1,157 53 0 37.3 2,300 19,588.4 4,880 0 53.7 38,850 1,147 56 30 37.0 2,280 1,591 93 0 56.8 3,160 .4 .1 0 .013 Q April...... 0 0 0 0 0 MaT...... 0 0 0 0 0 1,494.7 75 0 49.8 2,960 July...... 2t 163 83 21 69.8 4,300 83 75 80 9 5,000 2 * 408 83 ' 80.3 4,300 Water year 1937-38...... 15,098.3 83 0 41.4 29,950 J H'H'H HHH'HH' M 5CD-30> 0>*.dtOH' 0<0 00-30 CT *.«»>- tOtOCOCDCOCO CDCOtOCDCO tOCDCOCDCO tOtOtOCDCO CD tO CD CD CD CO CD CD CD CO bobbob bbbbb bbbob obobo obooo booob woooo ooooo ooooo ooooo ooooo ooooo q-q-q-^-j <|<|_q^_q <| -3 -3 -3 -3 -3 -3 O O-3 -3-3-3-3-3 -3-3 -3 O> O> OOOOOO OOOOO OOOOO OO O OOOOO OOOOJO -3-3-3-3-3-3 -3-3-3-3-3 -3-3-3-3-3 -3-3-3-3-3 -3-3O-3-3 -3-3-3-3-3 oboooo ooooo ooooo ooooo ooooo ooooo 1 cDa OO OOOOO OOOOO OOOOO OOOOO OOOOO I?eta tO tOtO tO M tO to to to -3 -3 -3 Oi « GDI-1 OOOOO O O u«b - £ HP fO tO CD CD-3 OO-3-3 1 tO CD -. P -3-3-3-3-3O OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO O O O O O & CO CO tO CD tO CDCDCDCDCD CD CO CO CD CO CD CD tO CD (O CD tO CD CD-3 -3-3-3-3-3 tO CO CD -3 OOOOC OOlGD g OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO bbbb < OJO CDCOCOCDCOCO CDtOCOCDW CDCOCOCDCO CDCDCDCDCD COtOtOCOCD CDCDCDCDCD -Hg1 bbbbbb bbbbo boboo ooooo ooooo ooooo tOCOtOCDl-'OOOlOl at GO GO OO OOI M -3 CD .> tO CD CD H -J > CD CD CD CD tO CD CO CD CO CD tO tO tO CD CD CD tO CD CD CD tO CD <0 CD tO to CD CD CD tO oboooo ooooo ooooo ooooo ooooo ooooo a> apt 01 9* tOCOCOCOCD COCDCOCDCO CDtf>COCDCO COtOCOttXO COtOCOCDCD CDCOCDtOtO O&l&tOOOOC> O) O) ooooo ooooo ooooo ooooo ooooo ooooo SANTA ANA RIVER BASIN 46 Mill Creek near Craftonville, Calif. Location.- Water-stage recorder and concrete control, lat. 34005'15", long. 117°02 I 25", in NEt sec. 13, T. 1 S., R. 2 W., at mouth of canyon, below bridge on Redlands-Bear Valley highway, 5 miles northeast of Craftonvllle. Altitude, about 2,950 feet. Station destroyed by flood of Mar. 2, 1938. Drainage area.- 4-2.9 square miles. Records available.- January 1919 to September 1938. Average discharge.- 19 years, 16.2 second-feet. Average combined discharge, river and canals, 19 years, 39.7 second-feet. Extremes.- Maximum discharge during year, 18,100 second-feet Mar. 2, by slope-area method; minimum dally discharge, 0.2 second-feet Oct. 1 to Dec. 10. 1919-38: Maximum discharge, that of Mar. 2, 1938; all water diverted Into Mill Creek power canal No. 1 at times. Remarks.- Records poor. No gage-height record during year. Discharge for Oct. 1 to Feb. 26 and Apr. 7 to Sept. 30 computed on basis of discharge measurements and records for Santa Ana River near Mentone; that for Feb. 27 to Apr. 6, on basis of rainfall run-off study and records for stations on nearby streams. Mill Creek power canals Nos. 1, 2, and 3 divert from points Just above, 3 miles above and 6 miles above station, respect ively. Sum of flow in creek and the three canals is given on next page. Discharge, In second-feet, water year October 1937 to September 1938 Day oot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 7 33S 138 134 143 46 26 17 8 3.5 6,300 138 133 142 44 25 15 S 5 2,820 136 132 141 43 82 14 4 22 1,080 136 131 141 43 15 14 5 10 920 136 130 140 43 14 13 ' 0.2 6 3.0 690 137 130 139 43 115 11 7 .8 580 139 130 137 42 100 9 8 .5 580 140 130 134 42 90 8 9 .5 460 142 130 131 42 74 7 10 ' 5 350 146 132 128 39 50 6.5 11 1.0 6 350 148 134 120 38 36 6 18 20 20 360 150 134 112 37 30 5 IS 10 8 570 152 137 104 35 27 4.5 a 3.5 .3 350 156 142 100 35 23 4.5 15 1.0 .2 240 158 151 96 36 22 4.5 16 N .2 200 158 158 96 35 21 4.5 17 .2 180 160 162 95 35 20 5.5 18 .2 170 160 163 94 37 20 26 19 2.0 160 158 162 93 36 19 8 80 1.0 155 155 161 93 36 17 6 81 .5 152 152 158 98 36 16 5.5 88 .3 150 150 152 88 35 15 4.0 83 .3 3.0 148 146 150 87 34 15 4.5 84 1.0 146 144 150 84 33 12 3.0 85 .5 145 142 150 55 31 11 3.0 86 .5 144 140 150 52 29 9 2.5 87 10 142 139 150 51 30 30 1.4 88 200 140 136 150 51 30 20 1.0 89 _ 140 135 150 49 28 21 1.0 SO _ 140 135 148 47 27 21 .9 31 - 140 - 145 27 21 - Second- Run-off In Month foot-days Maxlmun WJTilBTWP Mean acre-feet 6.2 ~ 0.2 12 6.0 .2 12 42 3 20 1.36 84 18,147.8 592 0 49.7 35,990 9 3 .3 J.OTO 311*2 200 .2 11.1 617 March...... 16,440* 6,300 140 595 April ...... 4,362 160 13 145 8*650 May...... 4 469 163 130 144 8,860 3*037 143 47 101 6,000 nrr July...... 1,127 46 < > I 36.4 2 200 963 115 9 31.1 1*910 September...... 215. S 26 .9 7.19 428 Water year 1937-36 ...... 32,988.8 6,300 - 90.4 65,440 46 SANTA ANA RIVER BASIN Discharge, In second-feet, of Mill Creek and canals near Craftonvllle, Calif., water year October 1937 to September 1938 Day Got. SOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 35 26 £2 23 31 346 138 134 143 75 58 48 2 34 26 27 23 31 6,300 138 133 142 74 57 47 3 33 26 22 23 32 2,820 136 132 141 73 57 46 4 34 25 22 23 45 1,080 136 131 141 73 57 46 6 35 26 20 23 38 920 136 130 140 73 57 45 6 34 26 22 22 34 690 137 130 139 73 140 44 7 32 27 22 22 31 580 139 130 137 73 100 43 8 32 25 22 22 30 580 140 130 134 73 90 42 9 32 25 22 22 34 460 142 130 131 71 82 41 10 32 25 25 22 36 350 146 132 128 69 72 40 11 31 25 24 22 38 350 148 134 120 69 66 39 12 30 25 38 22 46 360 150 134 112 67 60 38 13 30 24 30 23 43 570 152 137 104 65 57 37 14 30 24 21 23 37 350 156 142 100 65 55 37 15 31 24 26 26 35 240 158 151 98 66 54 37 16 29 23 25 24 32 200 158 158 96 67 53 37 17 27 24 25 24 32 180 160 162 95 68 52 37 18 28 23 24 24 31 170 160 163 94 69 51 38 19 28 23 23 27 35 160 158 162 93 70 50 38 20 29 23 21 27 32 155 155 161 93 70 49 38 21 28 23 22 25 31 152 152 158 92 69 48 38 22 28 23 24 24 30 150 150 152 88 68 47 38 23 27 25 23 24 31 148 146 150 87 67 45 37 24 28 25 23 25 31 146 144 150 86 65 44 36 25 27 22 24 23 30 145 142 150 84 64 44 36 26 27 23 27 23 30 144 140 150 82 62 45 35 27 27 23 24 23 36 142 139 150 81 61 46 34 28 26 22 25 23 216 140 136 150 80 61 47 34 29 26 23 24 29 140 135 150 78 60 48 33 SO 27 22 24 25 _ 140 135 148 76 59 49 34 31 27 - 24 25 - 140 145 59 49 - Second- Mean Run-off In Honth foot -days ygTrHnnran Minimum fto re-feet 924 35 26 29.8 1,830 726 &ort f £2 24.2 1,440 747 38 20 24.1 1,480 31,418.2 592 18.9 86.1 62,310 fyiz rj V36 £9 £2 £>O« ( 1,460 1>138 £16 30 40.6 2,260 March...... 18,448 6,300 140 595 36,590 April...... 160 135 145 8,650 Hay...... 4 469 163 130 144 8,860 3*215 143 76 107 6,380 2,098 75 59 67.7 4,160 1«8£9 140 44 59.0 3,650 1,173 48 33 39.1 2,530 Water year 1937-: 8...... 39,865 6,300 20 109 79,070 SANTA ANA RIVER EASIN 47 Mill Creek power canals 2 and 3 near Craftonville, Calif. Location.- Weir In tallrace of Southern California Edison Co.'s power plant, lat. 34"03'10", long. 117°02'25", In NEi sec. 13, T. 1 S., R. 2 W., near Redlands-Bear Valley highway, 5 miles northeast of Craftonvllle. Records available.- January 1919 to September 1938. Average discharge.- 19 years, 20.7 second-feet. Extremes.- 1919-38: Maximum dally discharge, 36 second-feet Nov. 19, 1923 and June 7, 1924; no flow May 27, 1923, Feb. 14, 1937, Mar. 3 to June 23, 1938 and Aug. 6, 7, 1938. Remarks.- Discharge computed from weir records at tallrace of power plant. Mill Creek power canal 2 diverts from Mill Creek In sec. 8, T. 1 S., R. 1 W.; power canal 3 di verts In sec. 13, T. 1 S., R. 1 W., about 3 miles above intake for canal 2. The canals serve power plants 2 and 3, which discharge Into a common tallrace. Records furnished by Southern California Edison Co. Discharge, In second-feet, water year October 1937 to September 1938 Day oet. HOT. Dec. Jan. Feb. Mar. Apr. *»y June July Aug. Sept. 1 31 22 19.5 19.9 22 7.B 0 29 30 30 2 30 22 19.7 20 23 5.0 0 30 30 30 3 28 22 19.9 20 22 0 0 30 31 30 4 29 22 19.7 20 22 0 0 30 30 30 6 30 22 18.3 19.8 22 0 0 30 30 29 6 29 22 19.6 19.5 22 0 0 30 14.9 29 7 28 23 19.6 19.5 22 0 0 31 0 30 8 27 22 19.7 19.5 22 0 0 31 0 30 9 28 22 19.7 19.5 25 0 0 29 6.9 30 10 28 22 19.5 24 0 0 30 21 30 11 27 22 21 19.5 26 0 0 31 29 29 12 27 22 17.8 19.5 23 0 0 30 29 29 13 27 21 19.5 19.5 24 0 0 30 29 29 U 27 21 15.4 19.9 23 0 0 30 29 29 16 27 21 19.9 24 23 0 0 30 29 29 16 26 20 19.5 22 22 0 0 30 30 29 17 24 21 20 21 22 0 0 30 30 29 18 25 20 19.8 21 22 0 0 30 30 11.8 19 24 20 20 22 24 0 0 31 30 28 «0 24 20 17.1 22 23 0 0 31 30 28 21 23 20 18.7 21 23 0 0 30 30 28 22 19.9 20 20 23 0 0 30 30 28 23 22 21 20 21 24 0 0 30 28 28 24 21 19.7 21 23 0 2.0 29 30 27 25 23 19.6 19.7 20 18.8 0 89 30 30 27 26 23 19.8 23 20 15.9 0 30 30 30 27 27 23 19.8 20 20 17 0 30 30 14.9 27 28 19.6 20 20 16.4 0 29 30 21 27 29 22 19.8 20 22 0 29 30 27 27 50 23 19.6 19.7 20 0 89 30 28 28 31 23 19.7 21 0 30 28 Seoond- Run-off In Month foot-days MaxijnuBi Mlnlmm Mean acre-feet Oot 796 31 22 25.7 1,580 Ho? 629.1 23 19.6 21.0 1,250 Dec 609.2 23 15.4 19.7 1,210 Calendar year 192 7...... 9,289.5 34 0 25.5 18,430 Jan 633.6 24 19.5 20.4 1,260 Pel 619.1 26 15.9 22-. 1 1,230 Mar 12.8 7.8 0 .41 25 Apr 0 0 0 0 0 *aj 0 0 0 0 0 Jun 178.0 30 0 5.83 353 Jul ass 31 29 30.1 1,850 Aug 785.7 31 0 25.4 1,560 S«l 842.8 30 11.8 27.2 1,670 1ater year 1937-3 6,038.3 31 0 16.5 11,990 48 SANTA ANA RIVER BASIN Mill Creek power canal 1 near Craftonvllle, Calif. Location.- Water-stage recorder and weir control, lat. 34°05'101', long. 117°02'25", in NKt sec. 13, T. 1 S., R. 2 W., a quarter of a mile downstream from point of diversion from Mill Creek and 5 miles northeast of Craftonvllle. Records available.- January 1919 to September 1938. Average discharge.- 19 years, 2.89 second-feet. Remarks.- Records good. Discharge determined by weir formula. This canal diverts from Mill Creek in NEi sec. 13, T. 1 S., R. 2 W., Just above station on Mill Creek near Craftonvllle. After passing through Mill Creek power house 1 water is distributed for irrigation. Discharge, In second-feet, water year October 1937 to September 1938 Day Oot. HOT. Dec. Jan. Feb. Mar. Apr. *ay June July Aug. Sept. 1 4.3 3.4 1.9 3.0 2.1 0 1.7 1.4 2 4.1 3.4 1.9 2.3 4.1 0 2.1 1.9 S 4.7 3.4 2.2 2.8 5.5 0 3.8 1.5 4 5.1 3.1 1.8 3.0 .6 0 12.4 l.S 6 4.7 3.3 1.9 2.6 6.2 0 13.2 2.6 6 4.7 3.4 1.3 2.6 9.3 0 9.7 3.3 7 4.3 3.4 1.7 2.6 8.1 0 .5 4.1 s 4.3 3.1 1.7 2.6 7.3 0 .5 4.0 9 4.3 3.1 1.7 2.5 3.6 0 .6 4.0 10 4.1 3.1 2.1 2.5 6.7 0 .6 3.6 11 3.4 3.1 1.9 2.5 6.5 0 .5 4.0 12 3.3 3.0 .1 2.6 3.5 0 .5 4.0 IS 3.3 3.0 0 2.8 10.8 0 1.4 3.6 14 3.3 3.0 2.4 3.0 13.5 0 3.3 3.6 16 3.4 3.0 5.1 1.8 11.4 0 3.0 3.6 16 3.1 2.8 4.9 1.6 10.2 1.6 2,5 3.6 17 3.1 2.S 4.9 2". 3 9.3 2.6 1.5 2.7 IS 3.0 2.8 4.1 2.2 8.6 1.6 1.2 0 19 3.4 3.1 3.1 4.4 3.8 2.9 .7 1.9 20 4.5 3.1 3.3 5.1 7.9 3.4 1.9 4.0 21 4.5 3.0 3.4 4.0 7.1 3.0 2.3 4.7 22 4.3 3.0 3.4 3.3 6.6 2.3 2.3 5.8 23 4.5 3.4 2.3 3.0 4.1 2.6 2.2 4.4 24 4.3 3.6 3.2 3.3 7.1 3.0 1.5 5.8 25 4.1 2.6 4.0 3.0 10.2 2.8 2.9 5.6 26 3.8 2.6 4.1 2.8 13.5 2.8 6 5.6 27 3.8 2.6 3.5 3.0 8.8 1.2 1.2 5.6 28 3.3 2.6 4.5 3.0 0 1.3 0 5.6 29 3.8 2.6 3.8 6.4 1.8 0 5.4 50 3.6 2.3 4.1 4.7 1.8 0 5.2 SI 3.4 3.6 4.1 1.8 0 S«oond- Run-off In Month foot-daya Maximum Minimum Mean acre-feet Dot 122.3 5.1 3.0 3.95 243 Hov 90.7 3.6 2.3 3.02 180 Dec 88.4 5.1 0 2.85 175 C 3,972.7 27 0 10.9 7,880 January 96.1 6.4 1.6 3.10 191 Feb 206.4 13.5 0 7.37 409 Mar 0 0 0 0 0 Apr 11...... 0 0 0 0 0 May 0 0 0 0 0 Jim 0 0 0 0 0 Jill 37.2 3.4 0 1.20 74 Aug 60.0 13.2 0 2.58 159 Sep 113.1 5.8 0 3.77 224 Water year 1937-3 834.2 13.5 0 2.29 1,660 SANTA ANA RIVER BASIN 49 Plunge Creek near East Highlands, Calil. Location.- Water-stage recorder, lat. 34°07'10", long. 117°08 1 30'1 , in NEiNEi sec. 1, T. 1 S., R. 3 W., at mouth ol canyon at crossing of North Fork ditch siphon, 2 miles northeast of East Highlands. Altitude, about 1,625 leet. Drainage area.- 16.9 square miles. Records available.- January 1919 to September 1938. Average discharge.- 19 years, 6.94 second-leet. Extremes.- Maximum discharge during year, 5,340 second-leet Mar. 2, by slope-area method; no flow Oct. 1-26. 1919-38: Maximum discharge, that ol Mar. 2, 1938; no flow for several months in each year. Remarks.- Records lair, except those for Mar. 2-11, which were computed on basis ol rainrall-runolf and retention studies and records lor nearby stations and are poor. Discharge for June 2 to Sept. 30, computed on basis ol one discharge measurement, estimates, and records for nearby stations. Diversions lor irrigation above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0.2 0.2 2.7 22 219 32 33 5.5 0.1 2 0 .2 .2 2.6 17 1,500 31 40 5 .1 3 0 .2 .2 2.9 35 1,130 28 45 4.5 .1 4 0 .2 .2 2.9 75 413 26 28 4.0 .1 6 0 .2 .2 2.7 27 240 27 25 3.5 .1 6 0 .2 .2 2.1 15 162 23 22 3.0 .1 7 0 .2 .2 1.8 11 110 20 19 3.0 .1 8 0 .2 .2 1.9 9.5 87 18 18 2.5 .1 9 0 .2 .2 2.4 14 74 17 16 2.0 .2 10 0 .2 .2 1.2 17 67 16 16 1.5 .2 11 0 .2 8 .3 36 62 13 14 1.0 .2 12 0 .2 11 .3 53 174 12 13 .8 .3 13 0 .2 3.2 .2 31 189 32 12 .6 .3 14 0 .2 1.5 .2 23 126 24 11 .5 .3 16 0 .2 .5 11 20 100 20 11 .3 .2 16 0 .2 6 16 84 19 11 .2 .2 17 0 .2 2.4 14 73 16 11 .2 .1 18 0 .2 1.2 13 67 15 12 .2 .1 19 0 .2 5.5 26 61 14 11 .2 .1 80 0 .2 6 16 55 14 11 .2 .1 21 0 .2 4.0 15 53 12 10 .2 .1 22 0 .2 3.2 14 50 13 9 .2 .1 23 0 .2 1^2 2.7 13 45 11 10 .2 .1 24 0 .2 2.6 2.4 12 46 16 9 .1 .1 25 0 .2 2.1 2.4 10 44 32 8.5 .1 .1 26 0 .2 2.7 1.2 10 42 23 7.5 .1 .1 27 .1 .2 3.5 .3 29 42 19 7 .1 .1 28 .1 .2 3.2 .3 167 40 17 7 .1 .1 29 .1 .2 2.9 1.5 42 23 6.5 .1 .1 30 .1 .2 2.9 1.1 38 30 6 .1 .1 31 .1 2.9 .6 33 5.5 .1 Seoond- Rim-off In ^flTrHTTP 1 MJiTllWg" Month foot-days Mean acre-feet Dot 0.5 0.1 0 0.016 1.0 Hoi 6.0 .2 .2 .20 12 Dec ember...... 53.0 3.5 .2 1.71 105 0 6,728.6 398 0 16.4 13,350 Jar nary 76.0 6.0 .2 2.45 151 Fet 762.5 167 9.5 27.2 1,510 Mar 5,468 1,500 33 176 10,850 Apr 11...... 613 32 11 20.4 1,220 Ma, 465.0 45 5.5 15.0 922 Jun 40.0 5.5 .1 1.33 79 Jill 4.2 .3 .1 .135 8.3 Aug 3.1 ».l 6.1 Sep 1.5 ».05 3.0 1 ater year 1937-38...... 7,492.8 1,500 0 20.5 14,860 Estimated. 50 SANTA ANA RIVER BASIN San Timoteo Creek near Redlands, Calif. Location.- Water-stage recorder and concrete control, lat. 34°01'55", long. 117°12'30", in NWtNWi sec. 4, T. 2 s., R. 3 KIT., 2 miles southeast of Redlands. Altitude, about 1,260 feet. Drainage area.- 118 square miles. Records available.- October 1926 to September 1938. Average discharge.- 12 years, 2.39 second-feet. Extremes.- Maximum discharge during year, 7,460 second-feet Mar. 2, by slope-area method; no now for several months. 1926-38: Maximum discharge, that of Mar. 2, 1938; no flow during several months each year. Remarks.- Records fair. Discharge for Mar. 3 to Apr. 29 computed on basis of field estl- mates of discharge and records for nearby streams. Entire flow is diverted above station except during high water. Discharge, In second-feet, water year October 1937 to September 1933 Day Oet. HOT. Deo. Jan. Feb. Mar. Apr. *"7 June July Aug. Sept. 1 0 1.2 286 0.1 S 0 1.1 1,860 .1 S 0 .4 296 .1 4 0 2.4 35 .1 6 0 2.1 15 .1 6 0 1.7 7 .1 7 0 1.2 3.7 .1 8 0 1.0 2.0 .1 9 0 .9 1.1 .1 10 0 .8 .6 .1 11 0 28 .3 .1 12 0 .1 61 0 13 0 0 20 0 14 0 0 5 0 16 0 0 3 0 16 0 0 2 0 17 0 0 1.5 0 18 0 0 1.0 0 19 0 0 .8 0 20 0 0 .6 0 21 0 0 .5 0 22 0 0 .3 0 as 0 0 .2 0 24 0 0 .2 0 25 0 0 .2 0 86 0 0 .1 0 87 0 0 .1 0 28 0 2.4 .1 0 29 .8 .1 0 SO .2 _ .1 0 31 .1 - .1 - Second- Run-off In Honth foot-days Haxinmu Hinlmm Mean acre-feet 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1,800.2 1,010 0 4.93 3,570 Jan 1.1 .8 0 .04 2 Fel 43.3 28 0 1.55 86 Kax 2^603.6 1,860 .1 84.0 5,160 April...... 1.1 .1 0 .04 2 Ma7...... 0 0 0 0 0 0 0 0 0 0 July...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Water year 1937-3 8...... 2,649.1 1,860 0 7.26 6,260 SANTA ANA RIVER BASIN 51 Warm Creek near Colton, Calif. Location.- Water-stage recorder, lat. 34°04'00", long. 117°18'30", San Bernardlno grant, at Colton Avenue bridge, 14 miles east of Colton, San Bernardlno County. Altitude, about 970 feet. Flood of Mar. 2 moved channel away from gage. Records available.- August 1920 to September 1938. Average discharge.- 18 years, 50.0 second-feet. Average combined discharge of Warm Creels and MeeKs & Daley canal, 18 years, 60.4 second-feet. Extremes.- Maximum discharge during year, 27,500 second-feet Mar. 2, from rating curve extended above 1,250 second-feet; minimum, 5 second-feet several times In October. 1920-38: Maximum discharge, that of Mar. 2, 1938; minimum, 2.0 second-feet Sept. 8, 1936. Remarks.- Records good except those for period of no gage heights, Dec. 3-9 and Mar. 2 to Sept. 30, which were computed on basis of 44 discharge measurements, rainfall- run-off studies,and records for stations on nearby streams and are fair. See p. 66 for records of Meeks & Daley canal, which diverts above station, and p. 52 for rec ords of combined flow of canal and Warm Creek. Sewage-disposal plant of city of San Bernardlno discharged 3,350 acre-feet into Warm Creek above station during year. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 5.5 6 8.5 55 98 660 101 83 49 32 23 21 2 5.5 6 8 36 36 10,200 102 82 48 33 23 21 3 5.5 6 8 38 77 5,700 103 81 47 32 22 20 4 6 6 8 39 172 924 104 SO 44 31 22 20 6 6.5 5.5 8 40 36 489 105 el 44 30 22 21 6 7 5.5 8 40 36 349 107 83 45 20 22 21 7 7 5.5 8 41 36 277 108 84 46 12 24 22 8 7.5 5.5 8 42 35 239 109 86 46 15 26 22 9 6.5 5.5 8.5 40 55 214 110 87 48 13 27 23 10 6 5.5 20 40 34 194 109 88 48 12 29 23 11 6 5.5 89 40 112 185 108 90 46 10 31 23 12 5.5 5.5 43 39 94 329 107 92 44 23 33 23 13 5 5.5 27 39 61 413 106 93 42 25 31 22 14 5 5.5 29 39 53 308 105 94 40 26 29 22 16 5.5 5.5 38 80 47 220 104 89 38 27 28 22 16 5.5 6 28 40 47 170 102 83 36 26 27 22 17 5 6.5 26 37 45 138 101 78 34 26 26 22 18 5.5 6.5 26 40 47 116 100 72 31 26 26 22 19 5.5 5.5 24 47 53 101 99 67 28 25 25 22 SO 5 6 25 44 44 94 98 62 24 26 25 23 21 5 5.5 26 40 45 88 97 56 16 26 25 23 22 5 5.5 26 41 45 86 96 51 15 24 25 23 23 5.5 6 40 40 46 85 95 46 15 24 25 23 24 5 6 29 41 45 87 94 42 21 24 25 23 25 5.5 6.5 29 41 44 89 93 37 21 24 25 21 26 5.5 7.6 41 41 45 92 91 39 17 24 25 20 27 6 8.5 32 38 105 94 90 41 13 24 25 19 28 6 8 32 38 448 95 88 44 22 24 24 18 29 6 9 34 50 - 97 87 46 20 24 23 17 30 6 8.5 34 39 99 85 48 18 24 22 16 31 5.5 - 34 40 - 100 50 24 22 - Seoond- Run-off In Month f dot-days MflTcinnim Minimum Mean acre-feet 177.5 7.5 5 5.73 352 186 9 5.5 6.20 369 795 89 8 25.6 1,580 10,946.2 660 4.5 30.0 21,710 1,285 80 35 41.4 2,550 Pel 2,041 448 34 72.8 4,050 Mar 22,332 10,200 85 720 44,290 April ...... 3,004 110 86 100 6,960 May...... 2,155 94 37 69.5 4,270 1,008 49 13 33.6 2,000 July...... 734 33 10 23.7 1,460 787 33 22 25.4 1,560 640 23 16 21.3 1,270 Water year 1937-3 3 ...... 35,144.5 10,200 5 96.3 69,710 52 SANTA ANA RIVER BASIN Combined discharge, in second-feet, of Warm Creek and Meeks & Daley canal near Colton, Calif., for water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 23 26 26 35 98 666 101 83 62 48 40 41 2 23 25 27 36 36 10, 225 102 82 60 44 40 41 5 22 23 27 38 77 5,715 103 82 59 42 39 40 4 23 24 26 39 172 925 104 81 56 42 39 41 e 22 23 26 40 36 490 105 82 57 40 39 42 6 22 24 26 40 36 349 107 84 56 30 39 40 7 22 24 27 41 36 277 108 86 58 25 41 42 8 22 23 27 42 35 239 109 88 60 28 42 44 9 21 22 27 40 55 214 110 91 59 27 44 43 10 21 23 29 40 34 194 109 94 57 27 46 41 11 21 24 92 40 112 185 108 96 53 23 49 40 12 21 23 44 39 94 329 107 99 51 38 51 42 13 19 23 27 39 61 413 106 101 51 41 49 41 14 20 23 29 39 53 308 105 105 54 43 47 42 15 21 23 28 80 47 220 104 101 54 44 45 42 16 21 23 28 40 47 170 102 93 42 42 46 41 17 21 24 26 37 45 138 101 87 35 42 45 40 18 21 24 26 40 47 116 100 82 43 41 45 40 19 22 24 24 47 53 101 99 77 47 40 43 40 20 22 25 25 44 44 94 98 73 42 40 42 41 21 22 24 26 40 45 88 97 67 36 40 44 40 22 22 24 26 41 45 86 96 63 35 39 44 40 23 22 25 40 40 46 85 95 58 35 39 45 42 24 23 26 29 41 45 87 94 55 41 40 45 42 25 24 26 29 41 44 89 93 50 41 39 45 40 26 24 26 41 42 45 92 91 52 38 41 45 39 27 24 27 32 41 105 94 90 54 32 40 46 38 28 25 26 32 43 448 95 88 56 41 40 46 37 29 26 28 34 50 . 97 87 58 38 40 43 36 50 25 27 34 39 _ 99 85 60 38 40 43 35 31 24 34 40 - 100 - 62 - 42 43 - Second- M^TTiyirflBI Mean Bun-off In Month foot-days Minimum acre-feet October...... 691 26 19 22.3 370 732 28 22 24.4 1,450 974 92 24 31.4 1,930 15,111.9 662 18.7 41.4 29,980 1,294 80 35 41.7 2,570 Pet 2,041 448 34 72.9 4,050 Mar 22, 380 10,225 85 722 44, 390 April...... 3,004 110 85 100 5,960 ti,,...... 2,402 105 42 77.5 4,760 1,431 63 32 47.7 2,840 July...... 1,187 48 25 38.3 2,350 1,360 51 39 43.9 2,700 1,213 43 35 40.4 2,400 Water year 1937-38...... 38.709 10,225 19 106 76, 770 SANTA ANA RIVER BASIN 53 Strawberry Creek near Arrowhead Springs, Calif. Location.- Water-stage recorder and broad-crested weir control, lat. 34°10'45", long. 117"15'55", in SE-J see. 11, T. 1 N., R. 4 W., upstream from Del Rosa Water Co.'s lower diversion dam and half a mile south of Arrowhead Springs. Altitude, about 1,650 feet. Drainage area.- 8.6 square miles. Records available.- December 1919 to September 1938. Average discharge.- 18 years (1920-38), 4.54 second-feet. Extremes.- Maximum discharge during year occurred Mar. 2 (not determined pending further study); minimum, 0.9 second-foot Oct. 1 (gage height, 1.11 feet). 1919-38: Maximum discharge occurred Mar. 2, 1938; practically no flow at times during 1929 and 1931-35. Remarks.- Records good except those for period of missing gage heights, Mar. 2-14, which were computed on basis of rainfall-run-off studies and are poor. Discharge for period when control was under construction, Sept. 10-30, computed on basis of two discharge measurements and records for stations on nearby streams. Small diversion above station for domestic use. Results of discharge measurements furnished by city of San Bernardino. Discharge, In second-feet, water year October 1937 to September 1938 Day Oet. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.9 1.3 1.3 2.3 12 106 22 27 9 6.5 2.5 2.2 2 1.0 1.0 1.1 2.2 6.5 792 20 34 9 5.5 2.5 2.0 S 1.2 1.1 1.2 2.2 26 414 20 31 9 5.5 2.8 2.0 4 1.5 1.0 1.2 2.4 50 132 20 27 9 5.5 3.2 2.0 6 1.5 1.0 1.1 S.5 19 76 21 24 8.5 5.5 3.5 2.1 6 1.5 1.4 1.0 2.1 12 62 19 22 8.5 .5 2.7 2.2 7 1.2 1.7 1.0 2.1 9 55 18 20 9 .5 3.1 2.2 8 1.0 1.5 1.5 2.0 8 51 17 18 9 .0 3.2 2.2 9 1.1 1.5 1.5 2.0 14 39 17 17 10 .9 3.2 2.1 10 1.2 1.6 1.9 2.2 12 34 17 16 11 .0 3.1 2.1 11 1.2 1.8 16 2.2 13 34 17 16 11 .7 3.0 2.2 12 1.2 1.8 11 2.2 18 148 18 16 11 .7 3.0 2.2 13 1.4 1.9 4.9 2.4 14 206 22 15 10 .7 3.0 2.3 14 1.3 2.0 3.5 2.5 11 92 19 15 10 .4 3.6 2.3 16 1.5 1.8 2.9 6.5 10 63 17 15 10 .2 3.6 2.3 16 1.4 1.8 2.4 4.2 9 55 16 16 10 .0 3.8 2.3 17 1.3 2.4 2.2 3.5 8 49 16 16 10 .6 4.2 2.3 18 1.2 2.0 2.1 3.6 8 44 14 17 10 .1 4.6 2.3 19 1.1 1.8 2.0 5.5 11 42 14 15 10 .2 4.1 2.3 20 1.2 1.8 1.9 5.5 8.5 39 14 15 9 .7 4.0 2.3 81 1.0 1.9 1.8 4.2 7.5 35 14 16 8 .9 4.0 2.3 82 1.0 1.6 1.8 3.6 7 34 14 16 7 .9 3.5 2.4 83 1.0 1.5 4.1 3.4 6.5 31 13 14 7 .6 3.5 2.4 24 1.0 1.6 2.8 3.1 6 29 16 13 7 .4 3.8 2.4 85 .9 1.6 2.4 2.9 5.5 28 22 13 6.5 .6 3.2 3.5 86 1.0 1.5 3.5 2.8 5.5 26 18 12 6.5 .1 3.2 2.5 27 1.2 1.3 3.2 2.6 12 26 16 12 6 .1 3.5 2.6 28 1.0 1.3 2.7 2.7 63 26 14 12 6 .2 3.5 2.6 29 1.0 1.2 2.4 3.1 _ 26 21 11 6.5 2.8 2.6 2.7 SO 1.0 1.2 S Waterman Canyon Creek near Arrowhead Springs, Calif. Location.- Water-stage recorder and broad-crested weir control, lat. 34°11'35", long. 117° 16'35", In SWfSWi sec. 2, T. 1 N., R. 4- W., 600 feet upstream from old tollhouse and 1 mile northwest of Arrowhead Springs. Altitude, about 2,125 feet. Control destroyed Mar. 2, replaced Sept. 21. Drainage area.- 4.55 square miles. Records available.- November 1911 to October 1914 and December 1919 to September 1938. Average discharge.- 20 years (1912-14, 1920-38), 2.91 second-feet. Extremes.- Maximum discharge during year occurred on Mar. 2 (not determined pending further study); minimum, 0.3 second-foot Oct. 6-13, 19-27. 1920-38: Maximum discharge occurred Mar. 2, 1938: no flow at times during summers of 1984-26, 1928-29, 1931, and 1934. Remarks.- Records fair except those for Mar. 2-14, which are poor. Discharge for period of missing gage heights, liar. 2-14, computed on basis of rainfall-run-off studies; that for Feb. 6, 7, and Apr. 28 to Sept. 20 computed on basis of records for stations on nearby streams. Small diversion above station for domestic use. Results of sev eral discharge measurements furnished by city of San Bernardlno, Discharge, In second-feet, water year October 1937 to September 1938 Day Oot. HOT. Dee. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 0,6 0.7 o.e 1.7 12 55 12 8 5.5 3.0 1.8 1.4 2 .7 .5 .7 1.7 3.1 478 12 12 5.0 3.0 2.0 1.4 5 1.0 .5 .7 1.7 26 156 11 10 5.0 2.8 2.4 1.4 4 .8 .7 .7 1.7 21 74 11 10 5.0 2.7 2.7 1.4 6 .7 .7 .5 1.5 7 51 12 8.5 4.8 2.7 2.7 1.4 6 .3 .8 .5 1.3 5.5 41 11 S 4.8 2.7 2.7 1.4 7 .3 .7 .5 1.4 4.8 35 11 7.5 4.8 2.7 2.7 1.4 8 .3 .7 .5 1.3 4.3 32 10 7.5 4.8 2.4 2.4 1.4 9 .3 .5 .8 1.3 2.9 30 10 7.5 5.0 2.4 2.2 1.4 10 .3 .5 1.6 1.3 1.3 29 10 7 5.0 2.2 2.0 1.4 11 .3 .5 21 1.1 8.7 29 9.5 7.5 4.8 2.2 1.8 1.4 12 .3 .7 5 1.1 11.5 109 10 7.5 4.8 2.2 1.8 1.4 13 .3 .7 3.1 1.1 8.5 111 12 7 4.8 2.0 1.8 1.4 14 .4 .8 1.9 1.1 6.5 63 10 7 4.4 2.0 2.0 1.4 15 .5 .3 1.9 5.5 5.5 48 9.5 6.5 4.4 2.0 2.2 1.3 16 .4 .7 1.7 2.9 5.5 43 9 7.5 4.4 2.0 2.4 1.3 17 .4 .8 1.5 2.3 4.8 42 9 7 4.4 2.0 2.4 1.3 18 .4 1.0 1.5 2.7 5.5 38 8.5 7 4.4 2.0 2.2 1.3 19 .3 1.0 1.5 3.4 6.5 35 8.5 7 4.4 1.8 2.0 1.2 20 .3 .8 1.3 3.1 4,8 34 8.2 7 4.4 1.4 1.7 1.2 21 .3 1.0 1.1 2.7 4.5 31 7.5 7 4.5 1.8 1.5 1.2 22 .3 .5 1 2.5 4.3 29 7 6.5 4.7 2.4 1.4 1.2 23 .3 .4 6 2.3 3.8 27 7 6.5 3.8 2.4 1.4 1.2 24 .3 .5 1.9 2.3 3.8 25 8.5 6.5 2.S 2.7 1.4 1.2 25 .3 .3 1.5 2.3 3.6 23 12 6.5 2.8 3.0 1.3 1.2 26 .3 .8 2.9 2.3 3.4 20 9 6 2.7 2.8 1.2 1.2 27 .3 .8 2.1 2.3 13 19 8.5 6 2.4 2.4 1.2 1.2 28 .4 .8 1.9 2.3 38 17 9 6 2.8 2.2 1.3 1.2 29 .5 .7 1.7 2.3 _ 17 10 6 2.8 2..0 1.4 1.2 30 .7 .5 1.7 2.3 _ 15 9 5.5 3.0 2.0 1.3 1.2 31 .8 1.7 2.3 - 14 5.5 - 2.0 1.4 - Second- lflTT City Creek near Highland, Calif. Location.- Water-stage recorder and control, lat. 34°08'20", long. 117°11'25", in NWJ SWf sec. 27, T. 1 N., R. 3 W., li miles northeast of Highland. Altitude, about 1,520 feet. Control destroyed by flood on Mar. 2. Drainage area.- 19.8 square miles. Records available.- October 1919 to September 1938. Average discharge.- 19 years, 9.31 second-feet. Extremes.- Maximum discharge during year, 6,900 second-feet Mar. 2, by slope-area method; no now for several months. 1919-38: Maximum discharge, that of Mar. 2, 1938; no flow for several months dur ing each year except 1923. Remarks.- Records good except those for period of missing gage heights, Mar. 2-10, which were computed on basis of slope-area determination of peak discharge and rainfall- run-off studies and are poor. Discharge for period when water was below intake pipe, July 28 to Sept. 30, computed on basis of estimates made once weekly by engineers. See p. 57 for records of City Creek Water Co.'s canal, which diverts above station, and p. 56 for combined flow of canal and City Creek. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0.4 5.5 23 254 41 48 12 5.5 0.3 0.2 2 0 .5 5 14 1,990 40 61 12 5.5 .3 .2 3 0 .2 5 33 735 39 62 11 4.9 .3 .2 4 0 0 5 94 262 38 49 10 4.9 .3 .2 6 0 0 5 42 208 39 44 10 4.9 .3 .2 6 0 0 5 24 160 35 44 10 4.5 .3 .2 7 0 0 5 16 144 32 43 10 4.2 .3 .2 8 0 0 5 14 96 27 31 10 3.8 .3 .2 9 0 0 5 24 80 25 29 10 2.8 .3 .2 10 0 .3 5 24 76 24 27 11 2.0 .3 .2 11 0 14 4.5 34 72 24 26 11 1.6 .3 .2 12 0 20 2.3 50 337 24 27 10 1.3 .3 .2 13 0 4.5 .9 33 491 42 26 9.5 1.2 .3 .2 14 0 2.0 .7 26 334 33 26 8.5 1.1 .3 .2 16 0 1.6 24 22 238 32 26 8.5 1.1 .3 .2 16 0 1.3 15 17 192 31 27 8 1.1 .3 .2 17 0 1.1 10 14 153 29 26 8 1.0 .3 .2 18 0 1.0 9.5 13 123 27 26 8.5 1.0 .3 .2 19 0 1.0 12 19 105 24 26 8.5 1.0 .3 .2 20 0 1.1 12 15 93 24 24 8.5 1.0 .3 .2 21 0 1.4 8 13 82 23 24 8 .e .3 .2 22 0 1.0 5.5 11 74 23 21 7 .6 .3 .2 23 0 6.5 4.5 10 67 22 18 7 .6 .2 .2 24 0 7.5 3.6 9 61 24 17 7 .5 .2 .2 25 0 6.5 2.6 8 57 34 17 7 .4 .2 .2 26 0 8.5 2.3 8 52 29 17 6.5 .3 .2 .2 27 .2 8.5 1.8 24 50 26 16 6 .3 .2 .2 23 .2 7.5 2.7 170 50 23 15 6 .3 .2 .2 29 .3 6.5 5.5 54 28 15 6 .3 .2 .2 30 .3 6 2.8 47 42 15 6 .3 .2 .2 31 5.5 2.1 43 12 .3 .2 Second- Run-off In Month foot-days Maximum Minimum Mean acre -feet Oct 0 0 0 0 0 Koi 1.0 .3 0 .03 2.0 Doc 114.4 20 0 3.69 227 Calendar year 1937...... 8,089.8 372 0 22.2 16,040 Jan 182.8 24 .7 5.90 363 Pet 804 170 8 28.7 1,590 Mar 6,780 1,990 43 219 13,450 Api 904 42 22 30.1 1,790 Maj 885 62 12 28.5 1,760 Jim 261.5 12 6 8.72 519 Jul 59.1 5.5 .3 1.91 117 Aug 8.4 .3 .2 .27 17 Sei 6.0 .2 .2 .20 12 f ater year 1937-3 10,006.2 1,990 0 27.4 19,850 56 SANTA ANA RIVER BASIN Combined discha econd-feet, of City Creek and canal near Highland, Calif., for ater year October 1937'to September 1938 Day Oct. HOT. Deo. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 2 9 2.9 3.5 5.5 23 255 43 48 21 11.4 6 4.4 e 2\± 2.5 3.7 5 14 1,990 43 61 21 11.4 6 4.5 3 2.5 2.4 3.9 5 33 738 42 62 .20 9.9 6 4.0 4 2.9 2.6 3.6 5 97 264 41 49 19.2 9.4 6 3.9 B 2.8 2.6 3.5 5 45 208 42 44 19.1 8.7 6.3 4.0 6 2.9 2.9 3.5 5 27 160 38 44 19.1 7.9 6.5 4.1 7 2.8 3.5 3.6 5 19.9 144 36 44 19.1 7.1 7.3 4.2 8 2.5 3.5 3.7 5 16.2 96 34 34 19.2 6.7 7.6 4.1 9 2.4 3.0 4.0 5 25 80 33 32 18.9 7.5 7 3.8 10 2.4 2.9 5.6 5 26 78 32 30 20 7 6.5 3.8 11 2.6 2.9 21 4.5 36 74 32 30 19.9 6.5 6.5 3.9 12 2.7 2.9 23 4.5 52 338 32 30 18.8 6.5 6.3 4.0 13 2.9 3.2 7.9 4.5 35 491 44 29 17.9 6.2 5.7 4.0 14 2.9 3.6 6.8 4.5 28 336 36 29 16.5 6.5 5.7 3.9 16 3.3 3.7 5.9 24 24 240 35 29 16.1 7 6.3 3.9 16 3.2 3.6 5.3 15 19.6 194 34 30 15.3 7.4 6.5 4.1 17 3.1 3.9 5 10 16.1 155 32 29 15.2 7.8 6.6 4.2 18 2.9 4.3 4.7 9.5 15.5 125 30 29 16.2 8.6 6.6 4.5 19 2.8 3.6 4.6 13.1 22 108 28 29 16.5 9 6.2 4.6 20 2.6 3.4 4.0 13.7 18.8 96 28 26 16.3 9.5 5.5 4.5 21 2.4 3.4 4.3 10.6 17.4 86 27 26 15.4 9.3 5.5 4.5 SS 3.4 3.4 3.9 8.9 15.3 78 27 24 14.1 8.6 5.5 4.4 23 3.5 3.4 8.3 7.9 14.3 70 26 23 14 8.4 5.2 4.3 24 3.0 3.5 7.5 7.2 13.2 64 28 22 14.1 8.5 4.9 4.2 25 2.7 3.6 6.5 6.7 11.9 60 40 21 14.2 9.2 4.9 4.1 26 2.1 3.5 8.5 6.4 11.9 55 34 21 13.2 8.7 4.8 3.8 87 2.1 3.4 8.5 5.5 26 54 31 21 12.3 8 5 3.7 28 2.1 3.4 7.5 5.5 170 54 28 21 12 7.5 5.4 3.6 29 2.1 3.5 6.5 5.5 58 32 22 12.3 7 5.2 3.8 50 2.2 3.4 6 5.4 _ 51 42 22 12.3 6.8 4.4 3.9 31 2.6 - 5.5 4.9 - 46 - 20 - 6.5 4.5 - Second- Mqx^nr11*1 Minimum Mean Run-off In Month foot -day s acre-feet October...... 83.7 3.5 2.1 2.70 166 98.4 4.3 2.4 3.30 195 196.8 23 3.5 6.45 396 9,212.9 374 1.7 25.2 18,260 228.3 24 4.5 7.36 453 873.1 170 11.9 31.2 1,730 March...... 6,846 1,990 46 221 13,580 April ...... 1,030 44 26 34.3 2,040 May...... 981 62 20 31.6 1,950 499.2 21 12 16.6 990 July...... 250.5 11.4 6.2 8.08 497 182.4 7.6 4.4 5.88 362 122.7 4.6 3.6 4.09 243 Water year 1937-38...... 10,468.1 1,990 2.1 28.7 22,600 SANTA ANA RIVER BASIN 57 City Creek Water Co.'s canal near Highland, Calif. Location.- Water-stage recorder, lat. 34°08'35", long. 117°11'25", in NWi sec. 27, T. IN., R. 3 W., If miles northeast of Highland. Records available.- May 1924 to September 1938. Average discharge.- 14 years (1924-38), 2.04 second-feet. Extremes.- Maximum daily discharge during year, 9.4 second-feet June 10 (gage height, 8.52 feet;; no flow at times. 1924-38: Maximum discharge, 10 second-feet May 30, 1927; no flow at times. Remarks.- Records good. Discharge for Jan. 12-14, Feb. 16-20, Mar. 18-20, and Apr. 15-19 computed on basis of records of City Creek near Highland, Calif. This canal diverts from City Creek a quarter of a mile above gage on that stream (see p. 56 for records of combined flow at City Creek and canal). Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 2.9 2.9 3.1 0 0 0.7 3.1 0 9.4 5.9 5.7 4.2 2 2.4 2.5 3.2 0 0 2.6 3.0 0 9.4 5.9 5.7 4.3 3 2.5 2.4 3.7 0 0 3.2 2.9 0 9.2 5.0 5.7 3.8 4 2.9 2.6 3.6 0 2.9 1.5 2.8 0 9.2 4.5 5.7 3.7 6 2.8 2.6 3.5 0 3.1 .3 2.9 0 9.1 3.8 6.0 3.8 6 2.9 2.9 3.5 0 2.8 1.0 2.5 0 9.1 3.4 6.2 3.9 7 2.8 3.5 3.6 0 3.3 1.7 3.6 1.4 9.1 2.9 7.0 4.0 8 2.5 3.5 3.7 0 2.2 1.3 7.1 3.3 9.2 2.9 7.3 3.9 9 2.4 3.0 4.0 0 .7 2.0 8.1 3.0 8.9 4.7 6.7 3.6 10 2.4 2.9 5.3 0 1.6 2.4 8.0 3.0 9.4 5.0 6.2 3.6 4.9' 11 2.6 2.9 7.4 0 1.4 2.2 8.0 2.9 8.9 6.2 3.7 12 2.7 2.9 3.0 2.2 2.4 1.4 8.0 2.8 8.8 5.2 6.0 3.8 13 2.9 3.2 3.4 3.6 2.4 .3 2.2 2.7 8.4 5.0 5.4 3.8 14 2.9 3.6 4.8 3.8 1.7 1.5 2.6 2.8 8.0 5.4 5.4 3.7 16 3.3 3.7 4.3 0 1.6 1.7 2.6 2.7 7.6 5.9 6.0 3.7 16 3.2 3.6 4.0 0 1.9 1.7 2.7 2.6 7.3 6.3 6.2 3.9 17 3.1 3.9 3.9 0 2.1 1.9 2.8 2.6 7.2 6.8 6.3 4.0 18 2.9 4.3 3.7 0 2.5 2.0 3.0 2.7 7.7 7.6 6.3 4.3 19 2.8 3.6 3.6 1.1 3.0 2.6 3.8 2.6 8.0 8.0 5.9 4.4 20 2.6 3.4 2.9 1.7 3.8 3.1 4.3 2.5 7.8 8.5 5.2 4.3 21 2.4 3.4 2.9 2.6 4.4 3.5 4.3 2.1 7.4 8.5 5.2 4.3 22 3.4 3.4 2.9 3.4 4.3 3.5 4.2 3.5 7.1 8.0 5.0 4.2 23 3.5 3.4 1.8 3.4 4.3 3.4 4.0 4.6 7.0 7.8 5.0 4.1 24 3.0 3.5 0 3.6 4.2 3.4 4.3 4.7 7.1 8.0 4.7 4.0 25 2.7 3.6 0 4.1 3.9 3.3 5.7 4.1 7.2 8.8 4.7 3.9 26 2.1 3.5 0 4.1 3.9 3.2 5.2 4.3 6.7 8.4 4.6 3.6 27 2.1 3.2 0 3.7 1.5 3.5 5.4 4.8 6.3 7.7 4.8 3.5 28 2.1 3.2 0 2.8 .4 3.9 5.3 6.0 6.0 7.2 5.2 3.4 29 2.1 3.2 0 0 3.9 4.2 6.5 6.3 6.7 5.0 3.S 30 2.2 3.1 0 2.6 3.6 0 6.8 6.3 6 = 5 4.2 3.7 31 2.6 0 2.8 3.3 8.5 6.2 4.3 Second- Month MflYfimmi Rim-off in foot-days Minimum Mean acre-feet 00 1 83.7 3.5 2.1 2.70 166 Nov 97.4 4.3 2.4 3.35 193 Dec 85.8 7.4 0 2.77 170 C alendar year 193 1,128.9 8.8 0 3.09 2,240 Jan 45.5 4.1 0 1,47 90 Pet 66,3 4.4 0 2.37 132 Mar 73.6 3.9 .3 2 0 37 146 Apr 126.6 8.1 0 4.22 251 May 93.5 8.5 0 3.02 185 Jim 239.1 9.4 6.0 7.97 474 Jul 191.4 8.8 2.9 6.17 380 Aug 173.8 7.3 4.2 5.61 345 Sep 116.7 4.4 3.4 3.89 231 1ater year 1937-3 1,393.4 9.4 0 3.82 2,760 58 SANTA ANA RIVER BASIN Devil Canyon Creek near San Bernardlno, Calif. Location.- Water-stage recorder and concrete control, lat. 34°12'05", long. 117°20'10 11 , in Museupiabe grant, 7.3 miles northwest of San Bernardino, San Bernardino County. Altitude, about 1,800 feet. Drainage area.- 6.16 square miles. Records available.- November 1911 to September 1912, October 1913 to September 1914, and December 1919 to September 1938. Average discharge.- 19 years (1913-14, 1920-38), 2.40 second-feet. Extremes.- Maximum discharge during year occurred Mar. 2 (not determined pending further study); practically no flow during several months. 1913-14, 1919-38: Maximum discharge occurred Mar. 2, 1938; no flow for several months during summers of 1924-37. Remarks.- Records good except those for Oct. 1 to Jan. 31 and Aug. 10 to Sept. 30, which were estimated and are fair, and those for period of missing gage heights, Mar. 2-11, which were computed on basis of rainfall-run-off studies and are poor. City of San Bernardino diverted 1,648 acre-feet above station during year for municipal use and to spread over canyon floor for purpose of groundwater recharge. Results of several discharge measurements furnished by city of San Bernardino. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec, Jan. Feb. Bar. Apr. Hay June July Aug. Sept. I 0.1 48 21 19 2.0 0.5 0.3 0.2 2 .1 495 21 22 1.8 .4 .3 .2 S 5.5 359 20 19 1.7 .4 .3 .2 4 15 137 19 15 l.S .4 .3 .2 6 8 60 20 15 1.6 .4 .3 .2 6 5.5 46 19 15 1.6 .4 .4 .2 7 3.3 40 18 13 1.7 .4 .4 .2 s 1.3 36 16 12 1.6 .3 .4 .2 9 2.2 34 15 11 1.6 .3 .4 .2 10 2.4 32 15 11 2.0 .3 .5 .2 11 3.9 31 14 10 1.7 .3 .5 .2 12 7 143 15 9 1.7 .3 .5 .2 15 5.5 141 17 8 2.5 .3 .5 .2 14 4.0 70 15 6 1.7 .3 .4 .2 16 2;2 50 13 5.5 1.5 .3 .4 .2 16 1.6 48 13 9 1.3 .3 .4 .2 17 1.0 48 12 S 1.6 .3 .4 .2 18 1.3 44 11 5.5 1.5 .3 .4 .2 19 2.1 42 11 4.2 1.4 .1 .3 .2 20 1.8 39 11 3.7 1.3 .1 .3 .2 21 1.6 37 11 3.0 1.0 .1 .3 .2 22 1.4 36 10 2.8 .8 .2 .3 .2 23 1.0 33 12 2.8 .6 .2 .2 .2 24 .8 32 14 2.8 .7 .2 .2 .2 25 .7 29 21 3.2 .6 .2 .2 .2 26 .6 28 14 2.1 .5 .3 .2 .2 27 1.0 27 14 2.2 .4 .3 .2 .2 28 32.0 25 13 2.8 .4 .3 .2 .2 29 25 14 2.5 .5 .3 .2 .2 30 _ 23 16 2.1 .5 .3 .2 .2 31 - 23 - 2.0 - .3 .2 - Second- Mean Run-off in Month foot -day s Maximum Minimum acre-feet October...... 1.55 0.05 3.1 1.50 _ .05 3.0 3.1 - - .1 6.1 1,218.25 65 _ 3.34 2,420 4.65 .15 9.2 February...... 112.8 32 0.1 4.03 224 March...... 2, 261 495 23 72.9 4,480 April...... 455 21 10 15.2 902 May ...... 250 < 2 22 2.0 8.07 496 sgie 2.5 .4 1.32 79 July...... 9.1 .5 .1 .29 18 io!i .5 .2 .33 20 6.0 .2 .2 .20 12 Water year 1937-38...... 3,154.6 495 - 8.64 6,250 SANTA ANA RIVER BASIN 59 Lytle Creek near Fontana, Calif. Location.- Water-stage recorder, lat. 34°12'05", long. U7°26'50", In NWi sec. 6, T. 1 K., R, 5 W., (unsurveyed), a quarter of a mile below Lytle Creek power plant of Southern California Edison Co., and 7£ miles north of Fontana. Altitude, about 2,200 feet. Drainage area.- 4-7.9 square miles. Records available.- October 1918 to September 1921 and October 1922 to September 193S. Average discharge.- 14 years (1919-20, 1925-38), 10.4 second-feet. Average combined discharge or creek and Fontana pipe line, 17 years {1919-20, 1922-33, 36.4 second- feet. Extremes.- Maximum discharge during year, 25,200 second-feet Mar. 2, by slope-area method; no flow during parts of year. 1913-21, 1922-38: Maximum discharge, that of Mar. 2, 1938; no flow during most of each year. Remarks.- Records poor. Discharge computed on basis of discharge measurements and records furnished by Fontana Union Water Co. except that for Mar. 1-3, which was com puted on basis of rainfall-run-off studies. Table on following page shows total flow of Lytle Creek and Fontana pipe line and p. 61 for records for Fontana pipe line. Discharge, in second-feet, water year October 1937 to September 1938 Day Oot. SOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0 17 1,010 134 130 75 25 5 2 0 0 0 8,950 135 131 88 22 6 3 0 0 225 2,330 134 128 71 20 6 4 0 0 242 1,080 131 146 67 19 6 5 0 0 29 883 131 123 65 18 5 6 0 0 0 692 143 122 63 16 5 7 0 0 2.0 600 114 118 61 13 5 8 0 0 0 550 116 117 59 12 9 9 0 0 27 550 111 114 58 11 35 10 1.0 0 29 490 110 110 57 12 6 11 25 0 120 658 110 102 57 14 6 12 32 0 81 897 108 122 58 19 5 13 8 0 33 752 108 108 58 16 4.4 14 0 0 27 383 106 110 58 17 4.3 16 5 126 12 305 106 106 59 17 4.0 16 1.4 4.0 12 239 102 105 59 17 3.3 17 0 0 11 254 98 101 62 18 4.2 18 0 0 IS 203 95 119 58 15 2.4 19 0 0 19 280 93 95 54 15 1.3 20 0 0 20 262 94 95 52 14 1.6 21 0 0 16 268 98 99 49 12 1.6 22 0 0 14 232 100 97 46 11 1.1 23 0 0 14 209 103 96 43 10 1.4 24 0 .5 11 188 10S 101 40 10 .9 25 0 0 9 176 121 39 39 10 .2 26 1.4 0 9 166 121 104 35 9 .1 27 2.0 0 112 156 135 99 33 9 0 28 0 0 807 141 120 91 31 8 0 29 0 0 132 122 89 30 8 0 30 0 0 136 130 86 27 9 0 31 0 0 137 83 7 0 Seoond- Run-off in Month foot-days Ma*i*u» HiniroBn Mean acre-feet <; Oot 0 0 0 0 0 NO7 0 0 0 0 0 Dec 75.8 32 0 2.45 150 Calendar year 193 7,918.8 433 0 21.7 15, 710 Jan 130.5 126 0 4.21 259 Fell 1,916.0 807 0 68.4 3,800 Mar 23,309 8,950 132 752 46,230 Apr 11...... 3,437 143 93 115 6,820 May 3,346 146 83 108 6,640 Jun 1,612 88 27 53.7 3,200 Jul 433 25 7 14.0 859 Au« 129.8 35 0 4.19 257 S«p 0 0 0 0 0 1ater year 1937-3 34,389.1 8,950 0 94.2 68,220 60 SANTA ANA RIVER BASIN Combined discharge, In aeoond-feet, of Lytle Creek and Fontana pipe line near Pontana, Calif., water year October 1937 to September 1938 Day Dot. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 53 40 35 26 67 1,020 191 184 139 91 77 67 2 53 39 35 26 41 8,960 191 183 137 88 78 66 S 53 39 35 26 268 2,330 189 179 134 86 78 64 4 52 39 35 27 268 1,080 187 177 132 85 78 64 6 51 38 34 27 82 883 184 175 130 83 78 63 6 51 38 34 27 60 692 180 174 128 82 78 63 7 50 38 34 27 53 600 172 170 126 82 77 63 S 50 38 34 27 50 550 173 168 125 85 81 61 9 49 38 34 27 83 550 169 165 123 83 85 61 10 49 37 34 27 72 502 168 160 122 84 78 61 11 49 37 55 27 156 714 168 159 122 85 78 61 12 48 37 59 27 130 944 166 159 123 86 77 60 13 47 36 41 27 89 805 166 153 123 87 76 60 14 47 36 35 27 85 436 164 155 124 88 76 58 16 47 36 30 164 72 361 164 154 124 89 76 57 16 46 36 24 52- 67 289 160 152 125 89 75 58 17 46 36 21 41 56 284 156 151 127 90 76 58 18 45 36 21 37 58 254 153 148 124 87 74 58 19 45 35 22 35 58 322 151 147 120 87 73 57 20 44 35 23 34 60 301 152 147 117 86 74 58 21 43 35 23 32 56 258'274 155 148 115 84 74 57 82 43 35 35 30 54 158 149 112 83 73 57 23 43 35 35 30 54 257 160 150 109 82 73 56 24 43 35 29 30 51 244 161 151 106 81 73 55 25 42 35 24 29 49 232 175 152 103 82 72 55 26 41 35 37 30 49 221 177 153 101 81 71 55 27 41 35 40 29 156 211 168 153 69 81 71 54 28 41 35 29 30 830 197 174 150 97 80 70 55 29 40 35 27 31 _ 186 178 148 95 80 71 54 SO 40 35 26 29 _ 191 184 145 93 80 70 53 31 40 - 26 29 - 193 142 - 79 68 - Seeond- llfUjrJBfmp M^nlnP1?" Run-off In Month foot-days Mean acre-feet 1,432 53 40 46.2 2,840 1,094 40 35 36.5 2,170 December...... 1,006 59 21 32.5 2,000 Calendar year 1937...... 27,210 480 21 74.5 53,980 1,067 164 26 34.4 2,120 3,174 830 41 113 6,300 March...... 24,341 8,960 186 785 48,280 April ...... 5,094 191 151 170 10,100 Ifay...... 4,901 184 142 158 9,720 3,555 139 93 118 7,050 July...... 2,614 91 79 84.3 5,180 2,329 85 68 75.1 4,620 1,769 67 53 59.0 3,510 Water year 1937 58 ...... 52,376 8,966 21 143 103,900 SANTA ANA RIVER BA.SIN 61 Fontana pipe line near Fontana, Calif. Location.- Water-stage recorders, lat. 34°12 1 05", long. 117°27'05", in sec. 6, T. IN., R. 5 W., at weirs of Fontana Union Water Co., 8 miles north of Fontana. Records available.- October 1918 to September 1921 and October 1922 to September 1938. Average discharge.- 19 years, 27.8 second-feet. Extremes.- 1918-21, 1922-38: Maximum daily discharge, 82 second-feet July 9, Aug. 5, 19157; no flow Apr. 8, 1935, Feb. 13, 27, 1936. Renarkg.- Pipe line diverts practically entire flow of Lytle Creek in NWi sec. 6, T. 1 N., R. 5 W., which flow passes through Fontana power house and is then used for irrigation and domestic supply. Figures of discharge given include those for period when flow passed through temporary diversion from headworks to Fontana domestic line, July X to Sept. 30. Discharge of pipe line added to discharge of Lytle Creek near Fontana gives total discharge of creek. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 53 40 35 26 50 15 57 54 64 66 72 67 2 53 39 35 26 41 6.7 56 52 49 66 72 66 & 53 39 35 26 43 0 55 51 63 66 72 64 4 52 39 35 27 26 0 56 31 65 66 72 64 6 51 36 34 27 53 0 53 52 65 65 73 63 6 51 38 34 2V 60 0 37 52 65 66 73 63 7 50 38 34 27 51 0 58 52 65 69 72 63 8 50 38 34 27 50 0 57 51 66 71 72 61 9 49 38 34 27 56 0 58 51 65 72 50 61 10 49 37 33 27 43 11.5 58 50 65 72 72 61 11 49 37 30 27 36 56 58 57 65 71 72 61 12 48 37 27 27 49 47 58 37 65 67 72 60 19 47 36 33 27 56 53 58 45 65 71 72 60 14 47 36 35 27 58 53 58 45 66 71 72 58 15 47 36 25 38 60 56 58 48 65 72 72 57 16 46 36 23 48 55 50 58 47 66 72 72 58 17 46 36 21 41 45 30 58 50 65 72 72 58 18 45 36 21 37 40 51 58 29 66 72 72 58 19 45 35 22 35 39 42 58 52 66 72 72 57 20 44 35 23 34 40 39 58 52 65 72 72 58 SO. 43 35 23 32 40 6.2 57 49 66 72 72 57 as 43 35 35 30 40 26 68 52 66 72 72 57 23 43 35 35 30 40 48 57 54 66 72 72 56 24 43 35 29 29 40 56 53 50 66 71 72 55 25 42 35 24 29 40 56 54 53 64 72 72 56 26 41 35 36 30 40 55 56 49 66 72 71 55 27 41 35 38 29 44 55 33 54 66 72 71 54 28 41 35 29 30 23 56 54 59 66 72 70 55 SS 40 35 27 31 » 54 56 59 65 72 71 54 50 40 35 26 29 _ 55 54 59 66 71 70 65 31 40 26 29 - 56 - 59 - 72 68 - Seoond- Ifq^ttnnm Run-off In Month foot-days Minimum Mean acre-feet October...... 1,432 53 40 46.2 2,840 1,094 40 35 36.5 2,170 931 38 21 30.0 1,850 19,295 82 21 52.9 38,270 48 26 1,860 __ p^Q o«r 60 eo 44 9 2,500 March...... l)o33.4 56 0 35 5 2,050 April...... i» 65*7 58 33 55! 2 May...... 1,555 59 29 50.2 3^080 1,943 66 49 64*8 3,850 July...... 72 65 70.4 4,330 2 201 73 68 71.0 4,370 l)769 67 53 59.0 3,510 Water year 1937-3 17,990.4 73 0 49.3 35,700 62 SANTA ANA RIVER BASIN Lytle Creek (east channel) at San Bernardino, Calif. Location.- Water-stage recorder, lat. 34°05'50", long. U7°19'05", in San Bernardino grant, near Atchison, Topeka & Santa Fe Railway "bridge, a quarter of a mile upstream from Mt. Vernon Street "bridge, at San Bernardino, San Bernardino County. Altitude, about 1,050 feet. Station was destroyed by flood on Mar. 2. Records available.,- January 1929 to September 1938. Extremes.- Maximum discharge di;ring year, 21,500 second-feet Mar. 2, by contracted- opening method; no flow during most of year. 1929-38: Maximum discharge, that of Mar. 2, 1938; no flow during most or each year. Remarks.- Records poor. Discharge for period following destruction of station, Mar. 1 to June 24, computed on basis of records for Lytle Creek near Fontana, Lone Pine Creek near Keenbrook, Cajon Creek near Keenbrook, Warm Creek near Colton, and un published records for Lytle Creek at Foothill Boulevard, collected by Fontana Union Water Co. Water diverted above station to debris cone for purpose ofgroundwater re charge and by Fontana pipe line for irrigation (see p. 61). Discharge, In second-feet, water'year October 1937 to September 1938 Day Oot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 18 604 20 64 6 2 0 1.0 7,640 19 62 4.0 S 0 91 4,460 18 60 2.0 4 0 167 625 17 58 1.7 5 0 4.3 228 17 55 2.0 6 0 2.S 160 17 52 2.5 V 0 .5 100 17 50 3.5 8 0 .1 68 17 49 6 9 0 .7 44 19 48 5.5 10 0 2.2 27 20 48 5 11 0 11 32 23 49 5 12 0 41 103 50 4.7 13 0 3.8 119 27 52 5 14 0 .3 74 28 56 5 15 9.5 0 54 29 56 5.2 16 0 0 56 28 54 5.2 IV 0 0 43 27 47 5.2 18 0 0 38 26 5.5 19 0 0 27 27 35 5.5 20 0 0 12 28 31 6 21 0 0 24 28 27 6 22 0 0 20 29 22 3.5 23 0 0 22 28 17 3.0 24 0 0 27 26 13 1.0 25 0 0 30 25 8 0 26 0 0 33 27 7 0 2V 0 2.7 34 32 7.5 0 28 0 255 33 39 8 0 29 0 30 47 9 0 30 0 26 64 9 0 31 0 22 8.5 Second- Run-off In Month foot -days MaxUn. Minimum Mean acre-feet Dot 0 0 0 0 0 NOT 0 0 0 0 0 Dec ember...... 0 0 0 0 0 C 1,313.5 521 0 3.60 2,600 Jan uary 9.5 9.5 0 .31 19 Pel 667.4 255 0 23.8 1,320 Mar 14,815 7,640 478 29,390 Apr 794 64 17 26.5 1,580 ¥" 1,154.0 64 7 37.2 2,290 Jim 104.0 6 0 3.47 206 Jul 0 0 0 0 0 Aim 0 0 0 0 0 Sep 0 0 0 0 0 1atsr year 1937-3 17,543.9 7,640 0 48.1 34,800 SANTA ANA RIVER BASIN 63 Lytle Creek (west channel) at Colton, Calif. Location.- Water-stage recorder, lat. 34°04'00", long. 117°19'15", In San Bernardino grant, on F Street near Colton Avenue at Colton, San Bernardino County. Altitude, at>out 980 feet. Records available.- January 1929 to September 1938. Extremes.- Maximum discharge during year, 7,900 second-feet Mar. 2, from rating curve extended above 480 second-feet; no flow during most of year. 1929-38: Maximum discharge, that of Mar. 2, 1938; no flow during most of each year. Remarks.- Records poor. Discharge for period Mar. 3-6 computed on basis of partial gage- height record and records for nearby streams. Water diverted above station to debris cone above Foothill Boulevard for purpose of groundwater recharge and by Fontana pipe line for irrigation (see p. 61). Discharge, In second-feet, water year October 1937 to Septeatmr 1938 Day Oct. HOT. Dec. Jan. Feb. lap. Apr. ««y June July Aug. Sept. 1 0.6 6.2 2 0 3,180 S .1 817 4 .1 27 6 0 1.6 6 0 .4 7 0 0 8 0 0 9 .6 0 10 0 0 11 .1 O IS 0 0 13 0 0 14 0 0 ie 0 0 16 0 0 17 0 0 18 0 0 19 0 0 20 0 0 S3. 0 0 22 0 0 23 0 0 24 0 0 25 0 0 26 0 0 27 .3 0 28 .1 0 29 - 0 30 « 0 31 - 0 Seoond- Run-off in Month foot-days Kaxisun if^^lffq^M Mean acre-feet 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4.3 4.0 0 .012 8.5 0 0 0 0 0 1.9 .6 0 .07 3.8 3,032.2 2 180 0 97.8 6,010 April...... 0 0 0 0 0 May...... 0 0 0 0 0 0 0 0 0 0 July...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Water year 1937-2 3,034.1 2,180 0 8.31 6,010 64 SANTA ANA. RIVER BASIN Cajon Creek near Keenbrook, Calif. Location.- Water-stage recorder and broad-crested weir control, lat. 34°15'50", long. 117U27'50", near north boundary of sec. 13, T. 2 N., R. 6 W., 300 feet above mouth of Lone Pine Creek and 1 mile north of Keenbrook. Altitude, about 2,620 feet. Drainage area.- 40.9 square miles. Records available.- December 1919 to September 1938. Average discharge.- 18 years (1920-38), 8.92 second-feet. Extremes.- Maximum discharge during year, 14,500 second-feet Mar. 2, by slope-area method; minimum, 1.3 second-feet Oct. 17 and 21. 1919-38: Maximum discharge, that of Mar. 2, 1938; minimum, 0.05 second-feet June 25, 1920. Remarks.- Records good except those for Mar. 2-15,which were computed on basis of rainfall-run-off studies and records for stations on nearby streams and are poor. No diversion or regulation above station. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.7 1.8 2.3 3.6 52 580 26 12 9.5 6.5 4.9 4.5 2 1.8 1.8 2.3 3.6 11 3,800 24 14 9.5 6.5 4.7 4.4 3 2.0 1.8 2.3 3.6 83 2,050 26 12 9.5 6.5 4.5 4.2 4 2.0 1.8 2.3 3.4 112 535 24 12 9.5 6 4.5 4.1 5 2.0 l.B 2.3 3.4 29 231 22 12 9 6 4.5 4.1 6 1.8 1.8 2.3 3.4 22 160 21 11 9 6 4.5 4.1 7 1.8 2.0 2.3 3.4 18 130 21 9.5 9 6 4.7 .1 S 1.7 2.1 2.1 3.3 15 110 21 9.5 9.5 6 4.9 .1 9 1.7 2.1 2.1 3.3 73 90 21 9 9.5 6 5 .9 10 1.7 2.1 2.3 3.3 41 80 21 9 9.5 6 5.5 .1 11 1.7 2.1 2.6 3.3 322 75 22 9.5 9,5 6 5.5 .1 12 1.6 2.1 2.7 3.3 77 150 22 10 9 6 5.5 .2 13 1.6 2.3 2.7 3.3 34 80 20 10 8.5 6 5 .2 14 1.6 2.3 2.7 3.3 25 75 19 12 8 6 5.5 .4 15 1.6 2.3 2.7 80 21 64 17 12 B 5.5 5.5 .2 16 1.4 2.3 2.7 10 18 56 14 12 8 5.5 5.5 .2 17 1.3 2.3 2.7 7 17 4S 13 11 7.5 5.5 5 .4 18 1.4 2.3 2.7 6 19 40 12 11 8 5.5 5 .4 19 1.4 2.3 2.7 5 23 43 12 10 8 5.5 5 .2 20 1.4 2.7 4.7 17 44 12 9.5 8 5.5 4.9 .9 21 1.3 2.3 2.7 4.1 14 42 11 9.5 8 5.5 4.9 .8 22 1.4 2.3 2.7 3.8 . 13 34 11 10 8 5.5 4.7 .6 23 1.6 2.3 4.4 3.8 12 33 11 10 .5 5.5 4.7 .8 24 1.6 2.3 3.4 3.9 11 30 11 10 .5 5.5 4.5 .1 25 1.6 2.4 3.3 3.6 11 28 14 11 .5 5.5 4.4 .2 26 1.7 2.4 7 3.6 10 26 12 12 5.5 4.5 .4 27 1.7 2.4 5.5 3.6 76 31 11 11 5.5 4.5 .7 28 1.7 2.4 4.2 3.8 533 29 11 11 6.5 5.5 4.4 29 1.7 2.3 3.9 3.6 28 13 11 6.5 5. 4.5 30 1.7 2.3 3.B 3.3 27 12 11 6.5 5.5 4.5 .9 31 1.7 3.6 3.3 29 10 5 4.5 Second-' Run-off in Month foot-days HaxiinuBt lHn4mnpi Dean acre-feet Oct 50.9 2.0 1.3 1.64 100 N07 65.1 2.4 1.8 E.17 129 Dec 94.0 7 2.1 3.03 186 0 4,416.6 320 1.1 12.1 8,760 Januarr 200.6 80 3.3 6.47 398 Feb 1,709 533 10 61.0 3,390 Mar 8,776 3,800 26 283 17,410 507 26 11 16.9 1,010 toy 333.5 14 9.5 10.8 661 Jun 248.0 9.5 6.5 8.27 492 Jul 178.5 6.5 5 5.76 354 Aug 150.2 5.5 4.4 4.85 298 Sep 127.3 5 3.6 4.24 252 Water year 1937-3 12,442.1 3,800 1.3 34.1 24,680 SANTA ANA RIVER BASIN 65 Lone Pine Creek near Keenbrook, Calif. Location.- Water-stage recorder and control, lat. 34°15'55", 117°27'55", in SWi sec. 12, T. 2 N., R. 6 W., 50 feet upstream from Atchison, Topeka & Santa Fe Railway bridge and 1 mile north of Keenbrook. Altitude, about 2,630 feet. Drainage area.- 15.3 square miles. Records available.- December 1919 to September 1938. Average discharge.- 18 years (1920-38), 1.63 second-feet. Extremes.- Maximum discharge during year, 6,180 second-feet (estimated) liar. 2: minimum, 0.6 second-foot Jan. 18-31, 1938. 1919-38: Maximum discharge, that of Mar. 2; minimum, 0.1 second-foot at times during period 1926-32. Remarks.- Records good to Feb. 5, poor thereafter. Discharge for Feb. 6-28 computed on basis of four discharge measurements and records for Cajon Creek near Keenbrook; that for Feb. 28 to Mar. 16, on basis o' rainfall-retention studies and records for nearby stations; and that for Mar. 17 to Sept. 30, on basis of 24 discharge measurements and records for nearby stations. Station destroyed by flood Mar. 2. No diversions or regulation above station. Discharge, In second-feet, water year October 1937 to September 1958 Day Dot. HOT. Dec. Jan. Feb. Kar. Apr. May June July Aug. Sept. 1 0.8 0.7 0.7 0.8 18 206 5.5 5.5 4.5 5.9 3.6 3.5 2 .8 .7 .7 .8 .7 1,480 5.5 6 4.3 3.9 3.6 3.5 .8 .7 .7 .8 10 840 5.5 6 4.3 3.9 3.6 3.5 4 8 .7 .7 .8 9.5 190 6 6 4.3 3.9 3.6 3.5 6 .7 .7 .7 .8 1.3 90 5.5 6 4.2 3.9 3.6 3.4 6 .7 .7 .7 .7 1.1 46 5.5 5.5 4.1 3.8 3.5 3.4 7 .7 .7 .7 .9 28 5.5 5 4.1 3.8 3.5 3.4 a .7 .7 .7 .8 18 5 4.8 4.1 3.8 3.5 3.4 9 .7 .7 .7 12 13 5 4.7 4.1 3.8 3.4 3.3 10 .7 .7 .7 8 9 5 4.6 4.1 3.9 3.4 3.3 11 .7 .7 .8 60 7 5 4.6 4.1 3.9 3.4 3.2 12 .7 .7 1.1 12 34 5 4.7 4.0 4.0 3.4 3.2 IS .7 .7 .8 .8 3.9 8 5 4.8 4.0 4.0 3.5 3.1 14 .7 .7 .8 1.0 1.8 5 5 4.9 4.0 4.1 3.5 3.1 IS .7 .7 .7 30 .9 4.7 4.9 4.9 4.0 4.0 3.5 3.0 16 .7 .7 .7 1.0 1.0 4.5 4.8 4.9 4.0 4.0 3.5 3.0 17 .7 .7 .7 .7 1.2 4.2 4.8 4.9 4.0 3.9 3.6 3.0 18 .7 .7 .7 .6 1.4 3.9 4.8 4.9 4.1 3.9 3.6 3.0 19 .7 .7 .7 .6 1.7 3.8 4.7 4.9 4.1 3.9 3.6 3.1 20 .7 .7 .7 .6 1.4 3.7 4.7 4.9 4.2 3.9 3.5 3.1 21 .7 .7 .7 .6 1.2 3.5 4.7 4.9 4.3 3.9 3.5 3.1 22 .7 .7 .7 .6 1.1 3:4 4.7 4.9 4.4 3.9 3.5 3.1 23 .7 1.1 .6 .9 3.4 4.8 4.9 4.5 3.9 3.5 3.2 24 .7 .8 .6 .9 3.3 5 4.9 4.2 3.8 3.4 3.2 25 .7 .8 .6 .8 3.2 5 5 4.2 3.8 3.4 3.3 26 .7 2.0 .6 .7 3.2 5 5.5 4.0 3.8 3.4 3.4 27 .7 .9 .6 4.0 3.4 5 5 4.0 3.7 3.4 3.4 28 .7 .8 .6 67 3.7 5 4.9 3.9 3.7 3.4 3.5 29 .7 .8, .6 4.2 5 4.8 3.9 3.7 3.5 3.6 30 .7 .8 .6 4.7 5.5 4.8 3.9 3.7 3.5 3.6 31 .8 .6 5.5 4.7 3.7 3.5 Seoond- Rxm-of t In Month foot-daya Ha*l*u» HiniMu* Mean acre-feet Oot 22.1 0.8 0.7 0.71 44 Hot 21.0 .7 7 .70 42 DOO 24.9 2.0 7 .80 49 C 463.2 42 .2 1.27 919 Jan nary 50.8 30 .6 1.64 101 Fet 224.2 67 .7 8-01 445 Mar 3,040.3 1,480 3.2 98.1 6,030 152.4 6 4.7 5.08 302 156.8 6 4.6 5.06 311 Jun 123.9 4.5 3.9 4.13 246 Jul 119.8 4.1 3.7 3.86 238 Aug 108.4 3.6 3.4 3.50 215 B«p 98.4 3.6 3.0 3.28 195 Vater year 1937-3 4,143 1,480 .6 11.4 8,220 56 SANTA ANA RIVER BASIN Meeks & Daley canal near Colton, Calif. Location.- Water-stage recorder, lat. 34°04'00", long. 117°18'40", In San Bernardlno grant, on Colton Avenue, 1 mile downstream from point of diversion from Warm Creek, and 1 mile east of Colton, San Bernardlno County. Records available.- September 1920 to September 1938. Average discharge.- 18 years, 10.3 second-feet. Extremes.- Maximum dally discharge during year, 25 second-feet Mar. 2; minimum, no flow during several periods. 1920-38: Maximum dally discharge, that Of Mar. 2, 1938; no flow at times. Remarks.- Records fair. Canal diverts water from right bank or Warm Creek 1-J miles northeast of Colton for Irrigation In vicinity of Colton, Riverside, and Corona. Stage-discharge relation has been affected during this season by backwater from operation of a pumping plant that discharges Into the canal 500 feet below station and by waste from swimming pool of city of Colton, which discharges Into canal 200 feet below station. Discharge, In second-feet, water year October 1937 to September 1933 Day Oct. HOT. Dee. Jan. F«b. Mar. Apr. May June July Aug. Sept. 1 17.4 19.5 17.6 0.1 0.1 5.9 0 12.9 15.7 17 20 2 17.6 19.3 19.1 -1 .1 25 0 12.4 10.7 17.4 20 3 16.9 17.2 18.9 .1 .1 15 .5 11.9 10.4 17 20 4 16.9 17.8 17.8 .1 .1 1 1 12.4 10.7 17.2 21 E 15.9 17.9 17.6 .1 .1 .5 1 13.4 9.6 17.3 21 6 14.5 18.3 18.5 .1 .1 .1 1.1 11.2 10.5 16.9 18.5 7 15 18.1 19.3 .1 .1 .1 2.5 11.6 12.6 16.9 20 a 14.3 17.2 18.9 .1 .1 .1 2.1 12.1 13.4 16.2 22 9 14.2 16-4 18.3 .1 .1 .1 3.7 11.2 13.7 17.4 19.9 10 15.2 17.2 9 .1 .1 0 5.5 9 15.2 16.9 18.1 11 15.2 18.3 3.2 .1 .1 0 6.4 6.8 12.9 18.3 17 12 15.3 17.8 1 .1 .1 0 7.1 7.2 14.5 18.3 18.7 13 14.2 17.2 .4 .1 .1 0 8 9 16.4 17.8 19.3 14 14.5 17.2 .2 .1 .1 0 11 13.8 17 17.8 19.9 IB 15.5 17.4 .2 0 .1 0 11.9 15.9 16.5 17.4 19.5 16 15.5 17.2 .2 0 .1 0 9.7 6.2 16.2 19.3 18.9 17 15.7 17 .2 0 .1 0 9.3 1.2 16.2 19.3 18.5 18 15.5 17.9 .2 0 .1 0 10 12 15.3 18.9 18.3 19 16.2 18.7 .1 0 1 0 9.7 19.3 15 17.8 18.3 SO 16.5 18.9 .1 0 .1 0 10.7 17.9 15.2 17.2 18.1 21 17 18.7 .1 0 .1 0 11.2 20 14.6 18.7 17-0 22 16.7 18.7 .1 0 .1 0 11.8 20 15.2 19.3 16.9 23 16.7 19.1 .1 0 .1 0 12.4 19.7 15 20 19.1 24 18.1 19.5 .1 0 .1 0 12.9 20 15.9 20 19.3 25 18.3 19.5 .1 0 .1 0 12.9 20 15.3 20 19.1 26 18.5 18.9 .1 .8 .1 0 13.4 21 16.9 20 19.3 27 18.5 18-7 .1 2.6 .1 0 13.5 18.7 16.4 21 18.9 28 18.9 18.3 .1 4.8 .1 0 11.9 18.7 16.4 22 18.7 29 19.9 IS. 5 .1 .2 0 11.5 17.9 15.7 20 18.7 50 19.3 18.5 .1 .1 0 11.9 19.5 16.5 21 18.7 31 18.3 .1 .1 0 11.9 17.9 21 Second- Run-off In Month foot-days M«TT4 rn»l Minimum Mean acre-feet Oct 512.2 19-9 14.2 16.5 1,020 NOT 544.9 19.5 16.4 18.2 1,080 Dec 181.9 19.3 .1 5.87 361 C 4,184.3 20.6 0 11.5 8,300 Jan uary 10.0 4.6 0 .32 20 Pet 2.8 .1 .1 .10 5.6 Mar 47.8 25 0 1.54 96 Apr 0 0 0 0 0 f*' 246.5 13.5 0 7.95 480 Jun 422.9 21 1.2 14.1 839 Jul 453.5 17.9 9.6 14.6 900 Aug 575.2 22 16.2 18.6 1,140 Sep 572.7 22 16.9 19.1 1,140 «ater year 1937-38...... ' 3,570.4 25 0 9.78 7,090 SANTA ANA RIVER BASIN 67 Day Creek near Etiwanda, Calif. Location.- Water-stage recorder and broad-crested weir control, lat. 34°11'00", long. 117U32 !25", in SWi sec. 8, T. 1 N., R. 6 W., a quarter of a mile downstream from confluence of two main forks and 6 miles north of Etiwanda. Altitude, about 2,940 feet. Station destroyed by flood on Mar. 2, rebuilt Sept. 2. Drainage area.- 4.8 square miles. Records available.- January 1929 to September 1938. Extremes.- Maximum discharge during year, 4,200 second-feet Mar. 2, by rainfall-run-off studies; minimum, 2.8 second-feet for several days in July and August. 1929-38: Maximum discharge, that of Mar. 2, 1938; minimum, 0.1 second-foot Dec. 19, 20, 1933. Remarks.- Records good except those for periods of missing gage heights, Nov. 13 to Fe5T~27 and Mar. 12 to May 1 (computed on basis of discharge measurements and records for stations on nearby streams) and Mar. 13 to May 1 (computed on basis of rainfall- run-off studies), all of which are poor. Etiwanda Water Co. diverted 1,250 acre-feet above station to debris cone for purpose of groundwater recharge. Discharge, In aeoond-feet, water year October 1937 to September 1938 Day Got. HOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 5.5 5 4.5 6 11 108 31 20 7 3.5 2.9 3.1 2 5.5 4.9 4.5 6 7 1,055 31 24 7 3.5 2.9 3.2 3 5.5 4.8 4.5 5.5 50 449 30 20 6.5 3.3 2.8 5.2 4 5.5 4.8 4.5 5 49 121 29 19 7 3.3 2.9 3.4 5 5.5 4.9 4.4 4.8 29 80 28 19 7 3.1 2.8 3.3 6 4.9 4.9 4.9 4.3 19 60 27 17 6.5 3.1 2.8 3.6 7 4.9 5.5 6.5 4.1 13 55 27 16 6 3.1 2.8 3.6 8 4.8 5 7 3.9 11 52 26 15 6 3.1 2.8 3.9 9 4.9 5 8 3.7 16 50 25 15 6 3.1 2.9 3.7 10 5 5 10 3.7 19 50 £4 15 5.5 3.1 2.9 3.7 11 4.9 4.9 16 3.6 31 50 23 15 . 6 3.1 2.9 3.7 12 4.9 4.9 9.5 3.5 33 130 22 15 6 3.1 2.9 3.7 IS 5 4.9 7 3.6 25 180 23 14 6 3.1 2.9 3.6 14 5.5 4.9 6 3.7 20 78 24 14 5.5 3.1 2.9 3.6 16 5.5 4.9 5 16 19 63 23 14 5.5 3.1 2.8 3.5 16 5.5 4.9 6 10 19 55 18 13 5 3.1 2.8 3.7 17 5.5 5 5.5 7.5 17 50 17 13 4.4 3.1 2.8 3.9 IS 4.9 5 5.5 7 17 46 18 13 4.4 3.1 2.8 4.0 19 4.8 4.7 5.5 6.5 17 43 25 14 4.4 3.1 2*9 3.9 20 4.9 4.6 5.5 5.5 17 42 26 13 4.4 3.1 2.9 3.9 21 4.9 4.5 5 4.9 17 40 25 13 4.4 3.1 2.9 3.9 22 5 4.5 5.5 4.7 14 39 23 12 4.1 4.8 2.9 3.7 23 4.9 4.5 10 5 13 38 23 11 4.1 4.8 2.9 3.7 24 5 4.6 7 5 12 37 23 11 4.1 2.8 2.9 3.9 25 4.9 4.6 7.5 4.8 12 36 20 10 3.9 2.8 2.9 4.0 26 5 4.6 8 4.8 12 36 20 8.5 3.9 2.8 2.9 4.1 27 4.9 4.5 8 4.7 14 34 20 7.5 3.7 2.9 2.9 4.3 28 4.9 4.5 7.5 4.7 107 33 20 7.5 3.7 2.9 3.1 4.4 29 4.9 4.5 7.5 4.8 - 33 20 7 3.7 2.9 3.1 4.5 30 5 4.5 7 4.9 . 32 22 7 3.5 2.9 2.9 4.5 31 5.5 - 6.5 5 - 32 - 7 - 2.9 3.1 - Second- Run-off In Month foot-days Moyflfftflfl Minimum Mean aore-feet October...... 158.3 5.5 4.8 5.11 314 143.8 5.5 4.5 4.79 285 210.8 16 4.4 6.80 418 3,397.0 58 3.1 9.31 6,730 167.2 16 3.5 5.39 332 640 107 7 103*22 . 9 1,270 '711 1,056 32 6,360 April...... 31 17 23 . 7 1,410 TUy...... 419. 5 24 7 13 . 5 155.3 7 3.5 5. 17 308 July...... 98. 8 2.8 3. 19 196 89. 6 3.1 2.8 2. 89 113.2 4.5 3.1 3.77 225 Water year 1937-2 6,114.4 1,055 2.8 16.8 12,150 38 SANTA ANA RIVER BASIN Cucamonga Creek near Upland, Calif. Location.- Water-stage recorder and control, lat. 34°10 I 15", long. H7°37'55", In NEi sec. 17, T. 1 N., R. 7 W., 6 miles north of Upland. Altitude, about 2,550 feet. Channel moved away from station by flood of Mar. 2, moved back on iprll 15. Drainage area.- 10.1 square miles. Records available.- December 1928 to September 1938. Extremes.- Maximum discharge during year occurred Mar. 2 (not determined pending further study; minimum, 3.7 second-feet Dec. 5. 1928-38: Maximum discharge occurred Mar. 2, 1938; minimum, 0.8 second-foot July 16, 17, Aug. 28 to Sept. 15, and Oct. 3-6, 1934. Remarks.- Records good except those for period of missing gage heights, Mar. 2 to Apr. 14, wnich were computed on basis of rainfall-run-off studies and are poor. No diver sion or regulation above station. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dee. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 5 4.1 4.1 5 14 223 36 21 12 9 7.5 5 a 4.9 4.0 4.2 4.9 7 2,120 35 21 12 9 8 5.5 s 5 3.9 4.1 4.8 60 719 34 20 12 9 7.5 5 4 5 4.0 3.9 4.7 53 266 33 20 12 10 8 5 5 5 4.0 3.8 4.6 32 149 32 18 12 9 8 5.5 6 4-8 4.2 4.3 4.3 21 122 31 18 13 9 8 5.5 7 4.6 4.3 6 4.2 14 109 30 17 13 9 7.5 5.5 8 4.6 4.3 7 4.1 12 81 30 18 13 8.5 7 5.5 9 4.3 4.2 7 4.0 22 68 29 19 13 8-5 6.5 5.5 10 4.3 4.3 9 4.0 24 68 28 19 13 8.5 5.5 5.5 11 4.3 4.3 14 3.9 43 68 28 19 13 8 6.5 5.5 12 4.6 4.5 8 3 .8 46 167 27 19 13 8 6.5 5 IS 4.8 4.5 6 3.8 33 242 28 19 13 7.5 6 5 14 4.8 4.5 5.5 4.0 25 108 29 15 12 7.5 6.5 5.5 15 5 4.5 5.5 40 20 80 30 15 12 7.5 6.5 5 16 4-7 4.5 5 14 20 69 23 15 12 7.5 6.5 5 17 4.2 4.6 5 11 18 66 19 15 12 8 7 5 18 4.0 4.6 4.9 9.5 17 63 20 15 13 8 7.5 5 19 4.0 4.3 4.7 9 18 60 29 15 12 8 7.5 4.7 80 4.1 4.2 4.5 8 16 58 29 15 12 8 7 4.4 21 4.1 4.1 4.6 7 14 55 29 15 11 8 6.5 4.4 SS 4.1 4.1 4.5 6 13 53 26 14 10 8 6 4.2 23 4.1 4.1 8 6.5 12 51 24 13 10 8 6 4.2 24 4.0 4.2 5.5 6.5 12 49 25 13 9 8 5.5 4.2 85 4.0 4.2 *6 6 11 47 21 13 9 8 5.5 4.4 26 3.9 4.1 *6 6 11 45 21 14 9 8 5 4.4 27 4.0 4.0 6 6 16 43 21 14 9 8 4.7 4.4 88 4.0 4-0 6 6 222 42 21 14 9 7.5 4.7 4.4 29 4.1 4.0 5.5 5.5 . 40 22 13 9 7.5 4.4 4.7 60 4.1 4.0 5.5 5.5 _ 39 22 13 9 8 5 5 31 4.2 - 5-5 5.5 - 37 - 12 - 7.5 5 - Seoond- Run-off In Month foot-daya ^a7r1 Ttnffli Klnimm Kean acre-feet 136.6 5 3.9 4.41 271 126-6 4.6 sig 4.22 251 179.6 14 3.8 5.80 356 5,502 138 3.8 15.1 10, 920 Jar uary ...... 218-1 40 3 »8 7.04 433 Fel 826 222 7 29.5 1,640 n^T 5,407 2,120 37 174 10,720 April...... 812 36 19 27.1 1,610 May...... 501 21 12 16-2 994 343 13 9 11.4 630 July...... 254 10 7.5 8.19 504 199.3 8 4.4 6.43 395 147.9 5.5 4.2 4.93 293 Water year 1937-3 9,151.1 2,120 3.8 25.1 18,150 «Interpolated. SANTA ANA RIVER BASIN 69 San Jaclnto River near San Jacinto, Calif. Location.- Staff gage, lat. 33°44'05", long. 116°49'45", In SEi sec. 13, T. 5 S., R. 1 E., at highway bridge, 8i miles southeast of San Jacinto. Altitude, about 1,980 feet. Drainage area.- 140 square miles. Records available.- October 1920 to September 1938. Average discharge.- 15 years (1921-25, 1927-38), 26.2 second-feet. Extremes.- Maximum discharge during year, 14,300 second-feet Mar. 2, by slope-area and contracted-opening methods; no flow for several months. 1920-38: Maximum discharge, 45,000 second-feet (estimated), Feb. 16, 1927; no flow during several months of each year. Remarks.- Records poor. Discharge for Mar. 1-4 computed on basis of gage readings, estimates- of discharge furnished by the Metropolitan Water District, and on records of release from Lake Hemet. Discharge for Nov. 4 to Dec. 12, Feb. 4-6, 19-25 and June 17 to July 19 computed on basis of partial gage-height records and measurements and estimates of discharge. Gage-height record furnished by Lake Hemet Water Co. Several diversions above gage. Storage In Lake Hemet. Discharge, In second-feet, water year October 1937 to September 1938 Day Oet. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0.1 2.0 0.6 890 134 132 26 0.3 2 0 .1 2.0 15 3,170 128 123 23 .3 S 0 .1 1.7 4.6 5,100 128 106 20 .3 4 .1 .1 1.7 45 1,500 128 102 17 .3 5 .1 .1 1.6 35 780 112 94 14 .3 6 .1 .1 1.6 28 522 115 90 11 .3 7 .1 .1 1.4 17 407 126 88 9.5 .2 8 .1 .1 1.4 13 368 103 83 8.5 .2 9 .1 .1 1.2 13 343 99 82 8.5 .2 10 .1 .1 1.0 37 295 99 77 7.5 .2 11 .1 1.0 .8 29 355 99 74 7.5 .2 12 .1 45 .8 74 2,070 99 74 7 .1 IS .1 18 .8 45 1,280 99 70 7 .1 14 .1 8.5 .7 30 940 111 68 4.3 .1 16 .1 3.5 .6 24 655 98 67 4.8 .1 16 .1 2.0 3.0. 24 550 100 66 4.3 .1 17 .1 1.5 1.1 18 494 98 68 3.5 .1 18 .1 1.2 .6 13 444 84 64 2.8 .1 19 .1 1.0 .4 23 374 88 62 2.0 .1 20 .1 1.0 4.3 21 368 ee 54 1.5 0 21 .1 1.0 1.7 17 355 88 68 1.0 0 22 .1 1.0 1.0 16 355 86 46 .9 0 23 .1 1.0 .7 16 174 79 45 .8 0 24 .1 9 .7 16 162 75 44 .7 0 25 .1 8.5 .6 18 153 84 41 .6 0 26 .1 8.5 .5 16 153 158 40 .5 0 27 .1 8.5 .4 170 138 41 .4 0 28 .1 3.8 .2 316 157 110 38 .3 0 29 .1 3.0 .2 157 94 34 .3 0 SO .1 2.3 .2 145 108 31 .3 0 SI 2.0 .2 140 29 0 Seoond- Vav^Tm-nK Vjnlimijai Run-off In Month foot-daya Mean acre-feet Oet 0 0 0 0 0 Nov 2.7 .1 0 .09 5.4 Dec 132.3 45 .1 4.27 262 Calendar year 1937 ...... 46,643.8 4,000 0 128 92,510 Jan uary 35.1 4.3 .2 1.13 70 Feb 946.2 316 .6 33.8 1,880 Mar 23,026 5,100 140 743 45,670 Apr 11...... 3,156 158 75 105 6,260 May 2,101 132 29 67.8 4,170 Jun 195.5 26 .3 6.52 388 Jul 3.6 .3 0 .116 7.1 Aug 0 0 0 0 0 Sep 0 0 0 0 0 11at«r year 1937-3 Q 29,598.4 5,100 0 81.1 58,710 70 SANTA ANA RIVER BASIN San Jacinto River near Elsinore, Calif. Location.- Water-stage recorder, lat. 33U39'45", long. 117°17'45'1 , near east line of sec. §, T. 6 S., R. 4 W., 2 miles east of Elsinore and 2i miles upstream from Elsinore Lake (low-water stage). Altitude, about 1,270 feet. Drainage area.- 717 square miles. Records available.- January 1916 to September 1938. Average discharge.- 22 years, 20.9 second-feet. Extremes.- Maximum discharge during year, 2,790 second-feet Har. 5 (gage height, 8.41 feet;; minimum, 0.5 second-foot Sept. 5. 1916-38: Maximum discharge, about 16,000 second-feet Feb. 17, 1927 (gage height, 11.8 feet); stream dry for several months each year. Remarks.- Records good. Discharge Nov. 6-19 estimated. Storage and diversions for irri- gation above station. Discharge, in second-feet, water year October 1937 to Septeabor 1938 Day Oot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 19 24 30 45 52 180 126 81 16 23 4.2 2.2 Z 19 22 30 46 48 961 115 81 13 23 4.4 2.0 3 18 22 30 48 47 1,400 103 92 12 23 4.4 1.0 4 19 23 30 48 55 1,570 88 95 11 24 4.4 .7 6 22 23 30 48 51 2,470 79 83 10 137 4.4 .5 6 20 . 31 48 46 1,500 81 75 9.5 104 4.4 1.2 7 20 32 48 46 964 78 61 9.5 46 4.4 2.9 8 19 32 49 46 604 78 54 9 27 4.4 2.3 9 19 34 48 53 594 74 49 9 3.8 3.8 1.3 10 19 38 44 54 536 59 45 8 3.6 3.8 1.0 11 21 42 45 59 476 49 40 8 29 3.8 1.6 12 22 27 50 39 66 468 47 38 8 70 4.0 4.2 13 23 45 34 59 399 45 36 10 8 4.4 3.1 14 23 47 33 56 436 53 37 12 3.3 4.9 2.6 15 23 47 44 54 675 68 36 13 3.6 4.9 2.3 16 25 46 44 52 765 75 36 13 4.2 5.5 2.0 17 25 46 41 51 684 70 36 13 2.8 4.7 2.2 18 24 46 39 52 576 65 37 14 4.2 3.6 1.7 19 23 J 46 41 58 496 58 40 15 6 3.3 2.3 20 23 30 46 47 53 420 50 42 15 5.5 3.1 4.2 21 23 30 39 36 50 371 49 42 16 6.5 3.3 5.5 22 22 32 42 32 51 324 48 41 16 6.5 3.3 4.7 23 22 33 47 33 53 288 45 39 13 6 3.3 6 24 22 33 50 56 252 41 36 11 6 3.3 11 25 22 33 50 30 53 220 42 36 11 5.5 2.9 10 26 23 33 53 30 52 194 48 34 12 5 2.6 77 27 24 33 53 30 86 169 81 28 13 5 2.4 149 28 24 32 51 33 100 149 105 «, 16 24 5 2.3 98 29 24 30 49 39 _ 143 99 14 23 4.4 2.2 25 30 24 31 48 41 _ 141 86 14 24 4.2 2.0 34 31 25 - 49 40 - 136 - 22 - 4.2 2.4 - Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet 681 25 18 22.0 1,350 842 33 22 28.1 1,670 December...... 1,309 53 30 42.2 2,600 Calendar year 1937 ...... 44,328.5 1,900 .1 121 87,930 1,255 49 30 40.5 2,490 1,559 100 46 55.7 3,090 March...... 18,561 2,470 136 599 36,820 April ...... 8,105 126 41 70.2 4,180 May...... 1,416 95 14 45.7 2,810 391.0 24 8 13.0 776 July...... 609.3 137 2.8 19.7 1,210 114.8 5.5 2.0 3.70 228 461.5 149 .5 15.4 915 Water year 1937- 58 ...... 29,304.6 2,470 .5 80.3 58,140 SANTA ANA RIVER BASIN 71 Elsinore Lake at Elsinore, Calif. Location.- Staff gage fastened to pier, lat. 33040'35", long. 117°21'30", on northeast shore, in La Laguna grant, at Aloha Beach Club, Elsinore, Riverside County. Zero of gage is 1,200 feet above mean sea level. Records available.- December 1915 to September 1938. » Remarks.- Elsinore Lake overflows only during and after years of heavy rainfall, such as that of 1916. Temescal Creek is high-water outlet of lake. Part of record furnished by D. R. Crane. Surface of lake has been below outlet since July 1917. History of lake is published in Water-Supply Papers 4E6, 429, and 441. Gage height, in feet, water year September 1937 to October 1938 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 48.9 _ _ . . 51.0 58.5 _ _ . . _ 2 - - - - - 51.1 58.5 - - - 57.9 - 5 - - 48.9 - - 52.4 58.6 58.9 - - - - 4 - 48.7 - - - 52.9 58.6 - - - - - 5 - - - - - 53.7 58.6 - - - - - 6 _ _ _ _ 50.0 54.5 58.6 _ . 58.4 . _ 7 - - - - 50.0 55.0 58.6 - 58.8 - - 57.2 8 _ - - - - 55.4 58.6 - - - - - 9 _ - - - - 55.6 58.6 - - - 57.8 _ 10 - - - - - 55.8 58.7 59.0 - - - - 11 _ . _ . _ 56.0 58.7 - - _ _ _ 12 .. - - - - 56.3 58.7 - - 58.3 - - 13 _ - - - - 56.4 58.7 - - - - 57.1 14 - - - - 50.3 56.6 58.7 - 58.7 - - - 15 - - - - - 56.7 58.7 - - - - - 16 _ _ 49.0 _ _ 57.0 58.7 _ . . 57.6 . 17 _ - - - - 57.2 58.7 59.0 - - - - 18 _ - - 49.6 - 57.4 58.7 - - - - - 19 48.8 48.8 - - - 57.6 58.8 - - 58.2 - . 20 - - - - 50.4 57.7 58.7 - - - - - 21 _ - _ _ . 57.8 58.8 . 58.6 . _ _ 22 - - - - - 57.9 58.8 - » - - - 23 - - - 49.7 50.5 58.0 58.8 _ - _ 57.5 .. 24 - - - - - 58.1 58.8 59.0 - - - - 25 - - - - - 58.2 58.8 - - - - - 26 _ . . . . 58-3 58.8 _ _ 58.0 _ _ 27 . _ _ 50.6 58.3 58.8 . .- _ _ _ 28 - - . - - 58.3 58.8 - 58.5 - _ 56.9 29 - - _ - - 58.4 58.8 - _ - - _ 30 _ . 49.3 _ _ 58.4 58.9 - - _ 57.4 57.0 31 - - - - - 58.4 - 58.9 - - - - 72 SANTA ANA RIVER BASIN Temescal Creek near Corona, Calif. Location.- T»ater-stage recorder, lat. 33°50'30", long. 117°30'45", in El Sobrante de San Jacinto grant, half a mile upstream from Blue Diamond Quarry and 4 miles southeast of Corona, Riverside County. Altitude, 730 feet. Records available.- January 1929 to September 1938. Extremes.-'Maximum discharge during year, 14.900 second-feet Mar. 2. by slope-area method; minimum, 0.3 second-feet Oct. 10 (gage height, 3.93 feet). 1929-38: Maximum, that of Mar. 2, 1938; no flow during large part of most years. Remarks.- Records good except those for period of missing gage heights, Mar. 1-14, which were computed on basis of ralnfall-run-off studies and are poor. Many diversions and three storage reservoirs above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Kar. Apr. May June July Aug. Sept. 1 1.6 1.6 1.1 5 4.0 88 100 21 25 10 6 5.5 2 1.6 1.6 2.2 4.8 9 3,460 8S 21 24 10 5.5 5.5 3 2.0 1.6 2.5 4.4 7 2,520 82 24 22 10 5 6 4 1.6 1.6 2.2 4.0 7.5 432 84 23 21 10 7.5 5.5 6 1.6 1.6 2.0 4.0 6 194 91 22 19 11 7 6 6 1.6 1.8 1.4 4.0 5.5 136 87 23 19 10 4.8 5.5 6 112 72 23 17 9.5 8.5 5.5 B 1.4 1.8 1.6 3.7 7 106 68 23 17 9.5 8.5 3.8 9 .7 2.5 1.6 3.0 7.5 102 65 23 18 9.5 8 4.4 10 .4 2.5 1.6 3.0 8 100 64 23 19 9 5.5 4.8 11 .4 2.5 1.6 1.8 8 216 64 19 20 9 5.5 5 12 .9 2.5 2.5 1.2 8 152 55 16 21 9 6 5 13 .8 2.2 3.0 1.2 6 125 50 16 8 7 5 14 .7 3.7 2.7 .9 7 120 46 17 23 8 6.5 5 16 1.4 5 3.7 1.6 7 116 46 17 22 6 5.5 5.5 16 1.4 3.3 3.7 2.0 6 112 46 19 21 7 5 6.5 17 .1 2.2 3.7 2.2 5 107 47 20 18 7 5.5 7 18 .4 2.2 3.3 4.0 5 123 48 20 17 6.5 6.5 6.5 19 .0 2.5 3.0 7.5 5.5 100 46 20 17 6 5.5 6.5 20 .2 2.2 3.7 7 4.4 87 49 20 16 6.5 5.5 6 21 .0 2.0 4.8 5 4.4 75 46 20 15 7 4.8 5 22 .7 1.6 5 5 4.4 96 46 20 14 7 4.1 4.8 23 .0 1.8 5 4.0 4.0 108 42 20 14 5 5.5 5.5 24 .3 1.1 4.8 3.0 4.0 104 42 21 14 5 3.2 6 25 1.1 5 2.7 4.0 100 39 21 13 6 3.0 5 26 .8 1.2 5 3.3 4.8 118 33 21 12 6.5 4.4 5 27 .8 1.1 5 3.3 10 115 24 21 14 6 4.1 5 2S .8 .8 5 3.3 11 129 22 21 13 5.5 4.8 5 29 .8 .9 5.5 4.0 130 28 22 12 6 6.5 5.5 SO .8 1.1 5.5 3.3 122 25 24 13 6 6.5 5.5 31 1.6 5 3.3 102 26 5 6 Seoond- Run-off in Month foot-days Ma^imim Minimum Mean aore-feet Oct 50.2 3.3 0.4 1.62 100 Non 59.4 5 .8 1.98 118 Dec 103.9 5.5 1.1 3.35 206 C aleudar year 1937 ...... 1,900.3 601 0 5.21 3,770 Jan uary 109.9 7.5 .9 3.55 218 Pel 176.0 11 4.0 6.29 349 Mar 9,707 3,460 88 313 19,250 Apr 1,645 100 22 54.8 3,260 Ma; 647 26 16 20.9 1,280 Jui 532 25 12 17.7 1,060 Ju3 236.5 11 5 7.63 469 Aug 177.7 8.5 3.0 5.73 352 Sep 162.8 7 3.8 5.43 323 1ater year 1937-3 13,607.4 3,460 .4 37.3 26,980 SANTA ANA RIVER BASIN 73 Chino Creek near Prado, Calif. Location.- Water-stage recorder, lat. 33°5Z ! 40", long. 117°38'40", In El Rlncon grant, on cnmo-Rlncon road, 1 mile west of Prado, Riverside County. Altitude, 460 feet. Records available.- January 1929 to September 1938. Extremes.- Maximum discharge during year, 5,200 second-feet Mar. 2 by slope-area method; minimum, 0.3 second-foot at times. 1929-38: Maximum discharge, that of Mar. 2, 1938; minimum, 0.1 second-foot at times during 1935-37. Remarks.- Records fair. Discharge for periods of missing gage heights Mar. 2 to May 3 ana Aug. 9 to sept. 30, computed on basis of seven discharge measurements and records for nearby streams. Many diversions for irrigation above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oot. HOT. Dec. Jan. Feb. Mar. Apr. *»y June July Aug. Sept. 1 0.3 0.5 3.1 4.9 78 302 13 14 5.5 1.8 0.3 0.3 s .4 .4 2.5 5 52 1,580 11 15 4.1 1.7 .3 .3 s .5 .4 2.9 4.0 21 1,200 9 9 4.3 1.6 .3 .3 4 .5 .5 3.2 3.6 50 371 8.5 8 4.3 1.5 .3 .3 5 .5 .6 3.9 3.8 21 205 8.5 9 4.3 1.3 .3 .3 6 .6 .9 4.2 3.4 13 155 9 8.5 4.4 1.2 .3 .3 7 .6 1.1 4.1 3.3 11 140 8 8 4.6 1.1 .3 .3 8 .6 1.2 4.2 3.3 9.5 13E 6.5 7 3.4 1.0 .3 .3 9 .6 1.6 4.3 3.1 47 130 6 6 3.1 .9 .3 .3 10 .6 1.6 7 3.0 67 128 6 4.6 3.5 .9 .3 .3 11 .7 1.8 7.5 3.1 47 130 6.5 4.4 3.1 .8 .3 .3 12 1.0 2.0 28 3.2 96 190 7 4.3 3.4 .8 .3 .3 19 1.1 1.7 12 3.2 29- 250 7.5 4.3 3.1 .8 .3 .3 14 1.1 1.5 6.5 3.1 20 190 8 4.6 3.1 .9 .3 .3 15 1.2 1.2 4.8 14 19 140 8 6.5 3.1 .7 .3 .3 16 1.2 1.5 4.7 24 17 100 8.5 6 3.0 .9 .3 .3 17 1.1 1.8 4.7 11 15 90 8.5 5.5 2.9 .6 .3 .3 18 1.1 1.7 4.7 9.5 14 86 8 5.5 2.8 .6 .3 .3 19 1.0 2.0 4.7 9 19 76 8 5.5 2.7 .6 .3 .3 SO .3 1.9 4.5 8.5 16 66 8.5 4.4 2.6 .6 .3 .3 Si .3 2.0 4.6 7 15 60 9.5 4.6 2.5 .5 .3 .3 22 .3 2.3 4.1 6 14 50 11 4.9 2.4 .5 .3 .3 23 .3 2.4 10 4.3 14 44 13 4.7 E.3 .4 .3 .3 24 .3 2.5 8.5 3.6 14 88 14 3.9 E.2 .4 .3 .3 25 .3 2.1 6.5 3-4 14 35 15 3.6 E.I .3 .3 .3 26 .5 1.7 6.5 3.4 13 32 14 3.4 2.0 .3 .3 .3 27 .5 1.8 8.5 3.7 42 28 12 3.3 1.9 .3 .3 .3 28 .4 2.1 6.5 3.8 89 24 10 4.7 1.8 .3 .3 .3 29 .5 3.0 6 13 21 9 6 1.8 .3 .3 .3 30 .5 4.0 4.2 13 18 10 6 1.8 .3 .3 .3 31 .5 4.3 11 15 4.3 .3 .3 Second- Mny^flflTffl Run-off in Month foot -day s Minimum Mean aore-fe«t Oot 19.4 l.E 0.3 0.63 38 Not 49.8 4.0 .4 1.66 99 Dec 191.2 28 2.5 6.17 379 C 5,710.9 413 .2 15.6 11,330 Jan uary 198.2 24 3.0 6.39 393 Feb 856.5 96 9.5 30.6 1,700 Mar 6,076 1,580 15 196 12,050 Apt 281.5 15 6 9.38 558 ¥* 189.5 15 3.3 6.11 376 Jun 92.1 5.5 1.8 3.07 183 Jul 24.2 1.8 .3 .78 48 to*TUt...... 9.3 .3 .3 .30 18 B«i 9.0 .3 .3 .30 18 1ater year 1937-38...... 7,996.7 1,580 .3 21.9 15,860 16112020 3!) a 74 SANTA ANA RIVER BASIN San Antonio Creek near Claremont, Calif. Location.- Water-stage recorder and concrete control, lat. 34°12'50", long. 117°40'00", In MWtSE-t sec. 36, T. 2 N., R. 8 W., at highway bridge, half a mile above Southern California Edison Co.'s Sierra power plant, and 8 miles northeast of Claremont. Alti tude, about 3,400 feet. Control destroyed by flood on Mar. 2. Drainage area.- 16.9 square miles. Records available.- March 1901 to September 1938. Average discharge.- 21 years (1917-38), 10.1 second-feet. Average combined discharge of creeK and canal, 21 years (1917-38), 22.9 second-feet. Extremes.- Maximum discharge during year occurred Mar. 2 (not determined Dendlng further study/; minimum, 0.7 second-foot at times. 1917-38: Maximum discharge occurred Mar. 2, 1938; minimum, less than 0.1 second- foot for several days during October 1934. Remarks.- Records good except those for period Mar. 2 to May 5, which were computed on basis of rainfall run-off studies and records for nearby streams and are poor. Southern California Edison Co.'s canal diverts water above station (see p. 76). Discharge, In aecond-feet, water year October 1957 to September 1958 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.9 0.8 0.8 o.a 4.7 217 125 74 57 37 27 19 a .9 .8 .8 .8 2.6 4,110 125 72 58 37 26 19 3 .8 .8 .8 .8 7.5 954 130 70 58 37 25 18 4 .8 .8 .8 .7 8.5 436 140 68 56 37 25 18 6 .8 .8 .8 .7 4.7 364 140 66 56 37 24 18 6 .8 .8 .7 .7 3.3 272 140 66 56 37 23 18 7 .7 .9 .7 .7 2.9 227 150 66 54 37 23 18 8 .7 .9 .7 .8 2.4 227 150 67 56 37 22 18 9 .7 .9 .7 .8 4.0 136 150 68 53 37 22 18 10 .7 1.0 .7 .8 4.2 136 140 70 53 37 21 18 11 .7 1.0 1.5 .8 12 136 140 72 52 37 21 18 IS .7 1.0 1.2 .8 11 274 130 73 52 36 21 18 13 .7 1.0 1.1 .8 5 375 130 73 51 36 22 18 14 .7 .9 1.0 .9 4-5 202 125 77 51 36 21 18 16 .7 .8 .8 n 4.0 175 120 78 50 36 21 18 16 .7 .8 .8 3.7 3.5 168 115 80 48 35 21 18 17 .7 .8 .7 2.1 3.7 163 110 82 48 35 21 18 18 .8 .8 .7 1.9 3.5 158 105 77 47 34 21 18 19 .7 .8 .7 1.9 3.7 154 102 75 47 33 20 18 20 .7 .8 .7 1.8 3.3 153 98 73 45 33 20 18 21 .7 .8 .8 1.6 3.1 151 94 72 46 32 20 18 SS .7 .8 .8 1.4 2.9 151 92 70 45 32 20 18 23 .7 .7 1.8 1.3 2.7 150 90 68 43 31 20 18 24 .7 .7 1.2 1.2 2.6 150 87 67 42 31 20 18 25 .7 .8 1.1 1.1 2.6 148 85 66 40 30 20 18 26 .7 .8 1.2 1.1 2.6 143 82 64 39 30 20 17 27 .7 .8 1.2 1.1 4.5 140 80 66 38 30 20 17 28 .7 .8 1.2 1.1 98 138 78 64 38 30 20 17 29 .7 .8 1.2 1.1 135 76 61 37 29 20 17 SO .7 .8 1.1 1.0 _ 133 75 58 37 28 20 17 31 .7 - 1.0 1.0 - 130 57 - 27 19 - Second- Ma-rl^mim Mean Run-off in Month foot-days Minimum acre-feet 22.6 0.9 0.7 0.73 45 25.0 1.0 .7 .83 50 29.3 1.8 .7 .95 58 9,632.4 169 .7 26.4 19,110 Jar 46.3 11 .7 1.49 92 Pet 218.0 98 2.4 7.79 432 Max 10,606 4,110 130 342 21,040 April ...... 3,404 150 75 113 6,750 Hay...... 2,160 82 57 69.7 4,280 1,453 58 37 48.4 2,880 July...... 1,051 37 27 33.9 2,080 666 27 19 21.5 1,320 537 19 17 17.9 1,070 Water year 1937-.58...... 20,218.2 4,110 .7 55.4 40,100 SANTA ANA RIVER BASIN 75 Combined discharge, in second-feet, of San Antonio Creek and Southern California Edison Co.'3 Canal near Claremont, Calif., for water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Fob. Mar. Apr. May Juno July Aug. Sept. 1 14 12 10 10 19 227 125 74 57 37 27 19 9 13 12 10 10 16 4,110 125 72 58 37 26 19 3 13 12 10 10 26 954 130 70 58 37 25 18 4 13 .12 10 10 30 436 140 68 56 37 25 18 5 13 12 10 10 27 364 140 66 56 37 24 18 6 13 12 10 10 23 272 140 66 56 37 23 18 7 13 12 10 10 22 227 150 66 54 37 23 18 8 13 12 10 10 20 227 150 67 56 37 22 18 9 13 12 10 10 28 136 150 68 53 37 22 18 10 13 12 10 10 26 136 140 70 53 37 21 18 11 12 12 11 10 52 136 140 72 52 37 21 18 12 12 12 11 10 35 274 130 73 52 36 21 18 13 12 12 11 10 25 375 130 73 51 36 22 18 14 12 12 10 10 24 202 125 77 51 36 21 18 15 12 11 10 36 26 175 120 78 50 36 21 18 16 12 11 10 15 26 168 115 80 48 35 21 18 17 12 11 10 14 25 163 110 82 48 35 21 18 18 12 11 10 14 24 158 105 77 47 34 21 18 19 12 11 10 14 26 154 102 75 47 33 20 18 20 12 11 10 14 25 153 98 75 45 33 20 18 21 12 11 10 14 25 151 94 72 46 32 20 18 22 12 10 10 12 24 151 92 70 45 32 20 18 23 12 10 12 12 24 150 90 68 43 31 20 18 24 12 10 12 12 24 150 87 67 42 31 20 18 25 12 10 12 12 24 148 85 66 40 30 20 18 26 12 10 11 12 24 143 82 64 39 30 20 17 27 12 10 11 12 26 140 80 66 38 30 20 17 28 12 10 11 12 119 138 78 64 38 30 20 17 29 12 10 11 12 - 135 76 61 37 29 20 17 30 12 10 11 12 - 133 75 58 37 28 20 17 31 12 - 10 12 - 130 - 57 27 19 Second- Rim-off in Month foot-days Mq-rtT^nB Minimum Moan acre-feet 383 14 12 12.4 760 335 12 10 11.2 664 324 12 10 10.5 643 15,757.1 189 10 43.2 31,250 381 36 10 12.3 756 815 119 16 29.1 1,620 March...... 10,616 4,110 130 342 21,060 April...... 3,404 150 75 113 6,750 MaT...... 2;160 82 57 69.7 4,280 1,453 58 37 48.4 2,880 JulT...... 1,051 37 27 33.9 2,080 666 27 19 21.5 1,320 537 19 17 17-9 1,070 Water year 1937-: 22,125 4,110 10 60.6 43,880 76 S'JJTA ANA RIVER BASIN Southern California Edison Co.'s canal near Claremont, calif. Location.- Hook gage, lat. 34°12«45" long. 117040'15tl , In NWiSEi sec. 36, T. 2 N., R. 8 Iff., at weir in tallrace of Sierraa power house on San Antonio creek, li miles down- stream from intake, and 8 miles northeast of Claremont. Altitude, about 3,160 feet. Records available.- January 1917 to September 1938. Average discharge.- 21 years, 12.9 second-feet. Remarks.- Canal diverts water from San Antonio Creek in SEi sec. 25, T. 2 N., R. 8 W., 1 mile above gaging station on San Antonio Creek near Claremont. Water Is used first for power development of sierra power house and then for Irrigation. Records furnished by Southern California Edison Co. The high water of Mar. 2, 1938, destroyed the power plant. There was no diversion after that date. Discharge, In second-feet, water year October 1937 to September 1938 Day oot. SOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 13.0 11.0 9.5 9.5 14.0 #10.0 2 12.0 11.0 9.5 9.0 13.0 0 S 12.0 11.0 9.5 9.0 18.0 0 4 12.0 11.0 9.5 9.0 22 0 5 12.0 11.0 9.5 9.0 22 0 6 12.0 11.0 9.5 9.0 20 0 7 12.0 11.0 9.5 9.0 19.0 0 8 12.0 11.0 9.5 9.0 18.0 0 9 12.0 11.0 9.5 9.0 24 0 10 12.0 11.0 9.5 9.0 22 0 11 11.5 11.0 9.6 9.0 40 0 12 11.5 11.0 9.7 9.0 24 0 18 11.5 11.0 9.6 9.0 20 0 14 11.5 11.0 9.5 9.0 20 0 15 11.5 10.0 9.5 25 22 0 16 11.5 10.0 9.5 11.0 22 0 17 11.5 10.0 9.5 12.0 21 0 ie 11.5 10.0 9.5 12.0 21 0 19 11.5 10.0 9.5 12.0 22 0 20 11.5 10.0 9.5 12.0 22 0 21 11.0 10.0 9.0 12.0 22 0 22 11.0 9.5 9.0 11.0 21 0 29 11.0 9.5 10.6 11.0 21 0 24 11.0 9.5 10.5 11.0 21 0 25 11.0 9.5 10.5 11.0 21 0 26 11.0 9.5 9.6 11.0 21 0 27 11.0 9.5 9.5 11.0 #21 0 28 11.0 9.5 9.5 11.0 #21 0 29 11.0 9.5 9.5 11.0 - 0 50 11.0 9.5 9.5 11.0 - 0 SI 11.0 - 9.5 11.0 - 0 Second- Run-off In Month foot -days Maxlmon Mlalmm Mean acre-feet 357.0 13 11 11.5 708 309.5 9.5 11 10.3 614 297.1 10.6 9 9.58 589 15,678.7 189 9 43.0 31,100 Jan 332.5 25 9 10.7 660 Fet 595.0 40 13 21.2 1,180 Mar 10.0 10 0 .32 20 April...... 0 0 0 0 0 May...... 0 0 0 0 0 0 0 0 0 0 JlllT...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Water year 1937-38...... 1,901-1 40 0 5.21 3,770 " Discharge estimated. SANTA ANA RIVER BASIN 77 Santiago Creek near Villa Park, Calif. Location.- Water-stage recorder, lat. 33°49'10", long. 117°46'30", In SWi sec. 13, T. 4 S., R. 9 w., five-eighths of a mile below diversion dam of Serrano and Carpenter Irrigation Districts and If miles northeast of Villa Park. Altitude, about 420 feet. Drainage area.- 83.8 square miles. Records available.- June 1920 to September 1938. Average discharge.- 18 years, 8.93 second-feet. Extremes.- Maximum discharge during year, 5,200 second-feet Mar. 2 (gage height, 6.27 feetj, by slope-area method; no flow for parts of several months. 1920-38: Maximum discharge, about 11,000 second-feet Feb. 16, 1927 (gage height, 8.4 feet), by slope-area method; no flow for several months of each year. Remarks.- Records fair. Discharge for periods of missing or Incomplete gage-height record, NOV. 1-30, estimated, and Jan. 31 to Feb. 14, Mar. 4-6, April 21 to Sept. 30, computed on basis of partial gage-height record, discharge measurements, and records for station at Santa Ana. Irvlne Co. and Serrano and Carpenter Irrigation Districts divert; above gage. Flow partly regulated by storage In Santiago Reservoir. Discharge, In second-feet, water year October 1937 to Septenbar 1935 Day Oct. HOT. Dec. Jan. ?«b. Mar. Apr. x«y June July Aug. Sept. 1 0 0.1 14 176 68 5 0 2 0 .4 5 2,660 68 2.0 0 S 0 .5 3.0 3,190 62 1.0 0 4 0 .4 2.0 1,190 62 0 0 5 0 .2 1.5 420 62 0 0 6 0 0 1.2 275 54 0 0 7 0 0 1.0 264 44 0 0 3 0 0 .9 253 32 0 0 9 0 0 .8 219 36 0 0 10 0 0 .7 197 54 0 6.6 11 .4 0 .7 186 65 0 .5 12 1.3 0 .8 583 68 0 0 IS 1.2 0 .8 1,030 65 0 0 14 1.1 0 .8 646 62 0 0 16 1.0 0 .8 442 65 0 0 16 .7 0 . .8 322 46 0 0 17 .3 0 .6 281 27 0 0 18 .1 .2 .7 253 17 0 0 10 0 .3 .9 214 17 0 0 20 0 .7 .8 197 17 0 0 21 0 .6 .7 180 10 0 0 22 0 .5 .6 160 9 0 0 85 0 .5 .6 150 8 0 0 24 0 .3 .5 117 6 0 0 85 0 .1 .3 101 15 0 0 26 0 0 .3 70 12 0 0 27 0 0 1.4 82 10 0 0 28 0 0 13 79 8 0 0 29 0 0 _ 73 S 0 0 SO 0 0 _ 70 7 0 0 31 0 2.0 - 70 - 0 Seoond- Run-off In Month foot-days MaTlmnn Minimum Mean acre-feet 6.1 1.3 0 .20 12 6,024.6 595 0 16.5 11,950 13 toy...... July...... 1.24 0 0 .04 2.5 0 0 .03 1.8 .60 0 0 .02 1.2 Water year 1937-3 15,320.5 3,190 0 42.0 30,390 78 SANTA ANA RIVER BASIN Santiago Creek at Santa Ana, Calif. Location.- Water-stage recorder, lat. 33°46'00", long. 117°52'45", In Santiago de Santa Ana grant, at end of Baker street, Santa Ana, Orange county. Altitude, about 120 feet. Records available.- January 1929 to September 1938. Extremes.- Maximum discharge during year, 4,400 second-feet Mar. 2 (gage height, 7.40 reetj, from rating curve extended logarithmically above 1,200 second-feet; no flow during most of year. 1929-38: Maximum discharge, that of Mar. 2, 1938; no flow during most of each year. Remarks.- Records fair. Discharge for periods of missing or Incomplete gage-height record, Jan. 15 to Feb. 28, Mar. 5-6, Apr. 19 to May 31, computed on basis of partial gage-height record, discharge measurements, and records for Santa Ana River at Santa Ana. Irvlne Co. and Serrano and Carpenter Irrigation Districts divert water above Discharge, In second-feet, water year October 1937 to September 1933 Day Oet. HOT. Dec. Jan. Feb. Mar. Apr. May June July lug. Sept. 1 0 32 340 17 0 2 0 0 1,990 17 0 S 0 0 2,320 17 0 4 0 0 1,060 21 2.0 B 0 0 650 25 2.0 6 0 0 300 29 1.0 7 0 0 151 28 .1 8 0 0 149 25 0 9 0 68 116 29 0 10 0 2.5 69 62 0 11 0 53 54 64 0 12 0 15 254 68 .1 IS 0 .5 660 68 .1 14 0 .1 500 68 .1 16 8 0 323 VI .1 16 0 0 208 67 .2 17 0 0 166 35 .2 18 0 10 136 12 .1 19 0 37 111 1.0 .1 20 0 30 91 .5 4-0 Si 0 10 74 0 .5 22 0 1.0 71 0 .2 23 0 .5 67 0 .1 24 0 0 61 0 -1 25 0 10 55 7 .1 26 0 5 47 0 .1 27 0 40 43 0 0 28 0 80 39 0 .5 29 12 34 0 1.0 50 11 _ 28 4.2 .5 31 7 - 25 - 1.0 Second- Maxlxnou Mean Run-off In Month foot-days Minimum acre-feet 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Calendar year 1937 ...... 6,977.5 1,350 0 19.1 13,840 Jan 38 12 0 1.23 75 Fet 394.6 80 0 14.1 783 Max 10,192 2,320 25 329 20,220 April...... 735.7 71 0 S4.5 1,460 May...... 14.2 4.0 0 .46 28 0 0 0 0 0 July...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Water year 1937-38...... 11,374.5 2,320 0 31.2 22,570 SANTA ANA. RIVER BASIN 79 Irvlne ranch drainage canal near Tustln, Calif. Location.- Water-stage recorder, lat. 33°30'50", long. 117°51'30", in San Joaquin grant, oh Lane Road bridge, 5 miles south of Tustin, Orange County. Altitude, about 26 feet. Drainage area.- 93 square miles. Records available.- November 1930 to September 1938. Extremes.- Maximum discharge during year, 5,710 second-feet Mar. 2 (gage height, 18.2 reet;; no flow during several periods. 1930-38: Maximum discharge, that of Mar. 2, 1938; no flow for several periods during 1932-38. Remarks.- This canal carries storm run-off from foothills, crosses ranch, and drains the son in a small area between Tustin and the ocean. Records furnished by Orange County Flood Control District, through M. N. Thompson, chief engineer. Discharge, In second-feet, water year October 1937 to September 1938 Day Get. HOT. Dec. Jan. Feb. Mar. Apr, Hay June July Aug. Sept. 1 0 0 10 373 0.5 o.s 0 0.5 0.1 8 0 0 .1 3,200 .4 .2 0 .5 .1 3 0 .2 O 1,040 .4 .2 0 .5 .1 4 0 0 7 12 .4 .2 0 .5 .1 6 0 0 0 10 .3 .2 0 .5 .1 6 0 .1 0 7 .3 .2 .1 .5 .1 7 0 .5 0 5 .3 .1 .2 .4 .1 8 0 0 0 4.0 .3 .1 .5 .3 .1 9 0 .5 15 3.0 .3 .1 .8 .2 .1 10 0 0 2.2 2.0 .3 .1 1.0 .2 .1 11 .2 0 12 1.0 .3 .1 1.2 .2 .1 18 1.0 0 5 146 .3 .1 1.5 .2 .1 13 0 0 .3 98 .3 .2 1.5 .2 .1 14 0 0 .3 6 .3 .2 1.5 .2 .1 16 0 0 .2 5 .3 .3 1.6 .2 .1 16 0 0 .2 4.0 .3 .3 1.6 .2 .1 17 0 0 .2 3.0 .2 .4 1.6 .2 .1 18 0 0 .2 2.0 .2 .4 1.7 .2 .1 19 0 .3 .1 1.0 .2 .3 1.7 .1 .1 EO 0 1.0 .1 1.0 .2 .3 1.6 .1 .1 an .2 1.0 .1 1.0 .2 .2 1.4 .1 .1 32 .2 0 0 1.0 .2 .1 1.2 .1 .1 23 .5 0 0 1.0 .2 .1 1.0 .1 .1 84 0 0 0 1.0 .2 .1 .8 .1 .1 25 0 0 0 1.0 .2 .1 .6 .1 .1 26 0 1.0 0 .9 .2 .1 .5 .1 .1 87 0 .5 1.8 .8 .2 .1 .5 .1 .2 28 0 .1 30 .7 .2 0 .5 .1 .2 SO 0 0 .6 .2 0 .1 .2 30 0 0 .5 .2 0 is .1 .1 31 0 0 .5 0 .5 .1 Second- Month ¥q^1pniwl Mean Run-off In foot-days Klnlmum acre-feet Oct 0 0 0 0 0 N07 0 0 0 0 0 Dec 2.1 1.0 0 .07 4.2 C 5,586.3 2,570 0 15.3 11,080 Jan uary 5.2 1.0 0 .17 10 Pet 77.8 30 0 2.78 154 Mar 4,932.0 3,200 .5 159 9,780 Apr 8.1 .5 .2 .27 16 Maj 5.0 .4 0 .16 9.9 JUE .6 *.02 1.2 Jul 26.1 1.7 0 84 52 Aug 7.0 .5 .1 .23 14 Sep 3.3 .2 .1 .11 6.5 II ater year 1937-3 5,067.2 3,200 0 13.9 10,050 ^Estimated. 80 SAN GABRIEL RIVER BASIN San Gabriel River near Camp Bonlta, Calif. Location.- Water-stage recorder, lat. 34°14'15", long. 117°49'10", In SWi sec. 22, T. 2 N,, R. 9 W., upstream from mouth of Susanna Canyon and 3 miles west of Camp Bonlta, Calif. Drainage area.- 91.4 square miles. Records available.- December 1932 to September 1938. October 1927 to September 1932, at site 3 miles upstream. Extremes.- Maximum discharge during year, 46,000 second-feet Mar. 2, computed by Geo- logical Survey; minimum dally discharge, 20 second-feet Nov. 28 to Dec. 4. 1932-38: Maximum discharge, that of Mar. 2, 1938; minimum, 1.5 second-feet Oct. 1, 1934. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Discharge, in second-feet, water year October 1937 to September 1338 Day Oct. HOT. Dao. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 26 22 20 31 79 1,980 350 210 141 90 53 40 2 24 2£ 20 31 60 10,000 345 224 141 95 53 36 S 25 22 20 30 188 5,100 340 215 135 88 51 38 4 25 22 20 29 299 2,750 340 183 132 87 50 40 6 25 22 21 £9 186 2,000 350 183 134 89 50 40 6 25 22 21 29 134 1,550 340 183 134 89 50 40 1 24 23 21 28 110 1,250 330 152 132 86 49 40 3 24 23 21 27 103 1,150 320 183 130 84 49 39 9 25 23 21 26 123 900 320 168 128 84 46 39 10 25 23 25 £6 186 720 315 191 125 83 44 40 11 24 23 41 26 364 620 310 182 124 83 44 39 12 24 23 72 26 359 2,100 305 191 121 78 43 39 13 24 23 41 26 272 1,850 295 182 119 76 44 37 14 24 23 34 26 228 1,400 290 200 119 74 45 33 IE 24 23 31 148 197 1,200 280 182 115 75 45 34 16 25 23 29 90 172 1,050 270 182 112 71 46 33 17 24 22 28 60 160 930 265 182 106 71 46 34 18 23 22 26 50 154 830 265 173 106 69 47 34 19 23 22 26 48 160 740 280 164 110 70 44 34 20 22 22 23 44 142 690 300 173 113 69 44 33 21 23 22 26 39 137 640 295 173 107 65 44 31 22 22 21 25 36 137 600 285 164 107 63 44 32 23 22 21 43 £5 127 570 280 164 101 60 45 33 24 £2 21 35 33 132 540 268 164 98 57 43 34 25 22 22 31 32 137 520 271 156 98 62 43 33 26 22 21 38 32 132 490 264 156 93 60 42 32 27 22 21 49 30 182 460 235 156 96 55 43 31 28 22 20 40 32 1,270 430 232 156 96 53 43 31 29 22 20 36 35 . 400 235 147 96 51 44 31 SO 22 20 34 31 - 370 232 138 97 52 43 31 SI 22 - 31 30 - 350 - 138 - 52 42 - Seoond- Run-off in Month foot-days Maximum Minimum Mean acre-feet 728 26 22 23.5 1,440 659 23 20 22.0 1,310 949 72 20 30.6 1,880 Calendar year 1937 ...... 53,130 1,440 20 14.6 105,400 1,195 148 26 38.5 2,370 5,930 1,270 60 212 11,760 March...... 44, 180 10,000 350 1,430 37,630 April...... 8,807 350 232 294 17,470 May...... 5,415 224 138 175 10,740 3,466 141 93 116 6,870 July...... 2,241 95 51 72.3 4,440 1,419 53 42 45.8 2,310 1,063 40 31 35.4 2,110 Water year 1937-38 * 76,052 10,000 20 208 150,800 SAN GABRIEL RIVER BASIN 81 San Gabriel River near Azusa, Calif. Location.- Water-stage recorder, lat. 34°10'25", long. 117°52'50", in se>-. 13, T. 1 N., R. 10 W., at Morris dam, 3i miles northeast of A^usa. Prior to Oct. 1, 1937, water- stage recorder at site 2f miles downstream; Oct. 1, 1937 to Feb. 21, 1938 at temporary site three-quarters of a mile downstream. Drainage area.- 211 square miles. Records available.- 1894 to September 1938. Average discharge.- 42 years (1896-1938), 115 second-feet. Average combined discharge of river ana diversions, adjusted for storage and evaporation in Morris Reservoir and San Gabriel River flood-control reservoirs 1 and 2, 43 years (1895-1938), 161 second-feet. Extremes.- Maximum discharge during year, 65,700 second-feet Mar. 2, computation of flow over spillway at Morris Dam; minimum, 0.1 second-foot Nov. 3-17. 1894-1938: Maximum discharge, that of Mar. 2, 1938; no flow tor several months each year during period 1894-1936. Remarks.- Records good. Results of some discharge measurements furnished by Los Angeles County Flood Control District. Flow tor storm period, Mar. 2-5, materially reduced by storage In flood-control reservoir, 2 (capacity, 10,800 acre-feet), and 1 (capacity, 48,500 acre-feet) of Los Angeles County Flood Control District, and Morris Reservoir (capacity, 39,400 acre-feet; of Pasadena Water Department. During most of year flow at station was completely regulated, except Mar. 2-5, by releases from Morris Reservoir of Pasadena Water Department. Azusa canal (formerly power canal of Southern California Edison Co.) diverts above high-water line of Morris Reservoir at point about 3 miles above station. Figures of discharge for Feb. 22 to May 18, May 23 to July 11, and July 16 to Sept. 30 furnished by city of Pasadena. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 2.6 0.2 0 3 36 3.S 205 860 8 29 40 353 246 2 2.4 .2 3 36 3.3 12,730 1,330 a 27 52 353 256 5 2.4 .1 3 46 5.5 21,660 1,280 9 27 61 344 261 4 1.6 .1 3 53 7 8,620 1,640 59 27 61 340 261 5 1.4 .1 3 53 6 4,520 2,410 88 27 63 329 260 6 1.4 .1 3 53 5.5 3,900 2,620 89 27 63 327 195 7 1.3 .1 3 53 4.2 3,840 2,500 89 29 61 420 74 8 1.1 .1 3 53 25 4,460 2,320 89 29 62 347 78 9 1.1 .1 3 54 72 4,940 2,290 89 35 62 325 80 10 1.0 .1 3 54 85 2,670 2,010 90 40 59 309 75 11 1.0 .1 1.9 55 89 1,620 1,190 90 50 117 299 69 12 .8 .1 20 57 92 1,950 462 90 60 202 298 69 13 .6 .1 38 58 39 2,690 418 66 55 209 299 70 14 .4 .1 38 43 89 2,700 414 90 72 211 299 93 15 .6 .1 38 6.5 88 2,380 414 90 75 180 299 112 16 .4 .1 38 3.6 88 1,920 382 55 75 74 299 92 17 .6 .1 38 14 88 1,140 392 68 78 62 299 84 18 .6 .2 38 60 88 1,760 395 134 SO 61 282 84 19 .6 .2 38 60 89 1,750 397 133 85 47 274 84 20 .6 .2 37 70 92 1.420 400 125 86 44 274 83 21 .5 .2 37 86 94 700 403 123 86 353 274 83 22 .4 .3 37 82 98 580 406 123 45 375 274 83 23 .3 .3 3S 79 99 1,030 409 60 12 376 263 77 24 .2 .3 37 73 170 1,360 343 10 48 382 252 73 25 .2 .3 36 60 341 1,300 96 10 61 378 252 73 26 .2 .3 37 57 3 0?. 1,300 13 10 61 371 212 73 27 .2 .3 36 59 180 1,210 12 10 44 363 183 72 28 .2 .3 36 66 86 1,310 9.5 16 38 360 181 72 29 .2 .3 36 63 _ 1,310 9 10 50 365 182 72 30 .2 .3 36 57 . 1,310 8.5 30 63 365 180 72 .2 - 36 35 - - - _^J 790 40 353 213 Second- M<-En Run-off in Run-off In Month foot-days Maximum Minimum acre-feet acre-feet* 25.3 2.6 0.2 0 50 2 November ...... 5.4 .3 .1 .18 11 2,116 December...... 729.9 38 3 ^ij*fjO1 K 1,450 4,136 Calendar year 1937 ...... 70,549.6 1,770 .1 193 139,900 213,142 January...... 1,635.1 66 3.6 52.7 3,240 5,658 February...... 2,485.3 341 3.3 88. 8 4,930 35,290 March...... 99,075 21,660 205 3,196 196,500 220,382 April...... 25,833.0 2,620 8.5 861 51,240 35,553 May...... 2,001 134 8 64.5 3,970 19,341 June ...... 1, 531 86 27 50.7 3,020 11,616 July...... 5,832 382 40 188 11,570 7,509 August...... 8,835 420 180 285 17,520 5,407 3,376 260 69 113 6,700 3,642 Water year 1937-3 151,354.0 21,660 .1 415 300,200 353,302 Combined discharge of river and canal, adjusted for storage and evaporatl-...on In Morris - ..Reservoir . and releases from San Oabriel River flood-control reservoirs 1 and 2. Records furnished try city ofo Pasadena. These figures of run-off are equivalent to combined discharge of San Oabriel Rive-ir and * Southern California Edison Co.'s canal as published for 1894-1933. 82 SAN GABRIEL RIVER BASIN San Gabriel River at Pico, Calif. Location.- Water-stage recorder, lat. 34°00'20", long. 118°04'05", in Paso de Bartolo grant, at Beverly Boulevard bridge half a mile east of Pico, Los Angeles County. Altitude, about 180 feet. Prior to Feb. 5, 1937 water-stage recorder at Whittier Boulevard bridge, about 0.6 mile downstream. Records available.- October 1938 to September 1938. Extremes.- Maximum discharge during water year 1936-37, 6,970 second-feet Feb. 14; no flow during several months. Maximum discharge during water year 1937-38, 22,700 second-feet Mar. 2; no flow during several months. 1928-38: Maximum discharge, that of Mar. 2, 1938; no flow for several months each year. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Discharge, In second-feet, 1936-38 1936-37 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. *ay June July Aug. Sept. 1 _ 176 60 30 0 2 - 116 112 37 0 3 - 140 108 34 0 4 - 82 99 27 0 5 11 108 116 27 0 6 2,180 82 126 18 0 7 336 78 140 20 0 8 67 37 108 15 0 9 90 23 131 18 0 10 75 22 116 23 0 11 60 48 116 23 2.2 12 67 75 51 23 0 IS 439 179 30 25 0 14 2,440 112 32 16 0 15 95 384 34 ,5 0 16 131 680 34 1.2 0 17 140 277 86 2.6 0 18 239 290 99 3.0 0 19 233 290 108 1.4 0 20 220 142 86 .8 0 21 204 108 78 3.5 0 22 155 279 75 6 0 S3 165 187 57 6.5 0 24 140 233 42 4.5 0 26 150 310 48 4.5 0 26 182 170 51 4.5 0 27 214 116 60 3.5 0 SB 209 99 64 1.6 0 29 - 71 40 0 0 30 _ 54 37 0 0 31 - 54 - 0 - SAN GABRIEL RIVER BASIN 83 Discharge, in second-feet, of San Gabriel River at Pioo, Calif., 1936-38 Continued 1937-38 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. K«y June July Aug. Sept. 1 0 31 304 2,040 12 61 2 0 34 55 11,400 167 65 3 0 34 60 6,080 254 52 4 0 29 88 3,190 221 56 5 0 29 60 1,420 384 48 6 0 36 55 1,030 503 44 7 0 40 52 916 469 48 8 0 36 47 1,270 242 44 9 0 34 326 2,030 278 39 10 0 31 95 1,050 314 30 11 0 34 321 615 254 30 12 11 34 196 1,020 150. 27 13 7 31 106 759 100 22 14 8 31 69 704 54 14 15 8 73 66 597 35 14 16 8 11 77 386 61 12 17 12 21 69 203 78 9 18 12 38 66 254 78 7 19 17 42 63 278 65 5.5 20 23 42 49 221 39 5.5 21 31 47 47 121 48 5.5 22 38 45 38 115 65 5 23 47 47 38 176 61 3.0 24 42 42 42 314 61 1.5 26 40 38 106 384 69 .5 26 49 36 95 384 69 0 27 47 34 216 134 52 0 28 34 34 840 78 52 0 29 34 36 121 61 0 30 34 34 140 56 0 31 31 36 70 0 Second- Month Maximum Minimum Mean Run-off In foot-days acre-feet Oct ober Nov Dec Calendar year Jan uary Fob ruary 5- 28, 1931? 8,343 2,440 11 343 16,350 Mar ch 5,022 6so 22 162 9,960 Apr 2,344 140 30 78.1 4,650 May 380.1 37 0 12.3 754 Juti 2.2 2.2 0 .07 4.4 Jul 0 0 0 0 0 Aug 0 0 0 0 0 Sep 0 0 0 0 0 1 31,720 Oct ober 192 7 ...... 0 0 0 0 0 Nov 0 0 0 0 0 Dec 533 49 0 17.2 1,060 Calendar year Jan uary 192 9 1,120 73 11 36.1 2,220 Feb 3,646 840 38 130 7,230 Mar 37,500 11,400 70 1,210 74,380 Apr 4,352 503 12 145 8,630 May 648.8 65 0 20.9 1,290 Jun 0 0 0 0 0 Jul 0 0 0 0 0 Aug 0 0 0 0 0 Sep 0 0 0 0 0 Water year 1937-38 ...... 47,799.5 11,400 0 131 94,810 84 SAN GABRIEL RIVER BASIN San Gabriel River at Spring Street, near Los Alamltos, Calif. Location.- Water-stage recorder, lat. 33°48'40", long. 118°05'30", in Los Alamitos grant, on Spring Street bridge, Itj miles west of Los Alamitos, Orange County. Alti tude, about 22 feet. Records available.- October 1936 to September 1938 in reports of Geological Survey. 1928-36 In files of office of Los Angeles County Flood Control District, Los Angeles, Calif. Extremes.- Maximum discharge during water year 1936-37, 4,560 second-feet Feb. 14; no flow during most of year. Maximum discharge during water year 1937-38, 27,300 second-feet (estimated) Mar. 2; no flow during most of year. 1936-38: Maximum discharge, that of Mar. 2, 1938; no flow during most of each year. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Discharge, in second-feet, 1936-38 1936-37 u«y Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. i 0 0.1 0 0.4 2 0 0 0 0 S 0 0 0 0 4 0 0 0 0 5 0 0 0 0 6 0 .3 1,770 0 7 0 .6 310 0 8 0 .4 .4 0 9 0 .1 0 0 10 0 0 0 0 11 0 0 0 0 12 0 0 0 0 IS 0 3.2 .3 117 14 0 .8 1,850 17 15 0 .1 109 16 16 0 0 26 561 17 0 0 26 177 18 0 0 42 197 19 0 0 50 157 20 0 0 47 83 21 0 0 47 1.0 22 0 0 29 130 23 0 0 14 89 24 0 0 15 117 25 0 0 11 194 26 0 0 12 23 27 0 0 1.8 1.0 28 0 0 .9 .1 29 0 0 - 0 80 0 0 - 0 31 566 0 - 0 SAN GABRIEL RIVER BASIN 85 Discharge, In second-feet, of San Gabriel River at Spring Street., nea Los AlamitoB, Calif., 1936-38 Continued Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 56 1,870 5.5 2 .8 14,500 0 5 0 9,250 5.5 4 3.0 6,190 35 5 0 1,950 95 6 0 1,070 210 7 0 802 248 8 0 743 270 9 156 1,660 166 10 75 911 188 11 89 248 87 12 107 690 36 13 6 416 0 14 0 440 0 15 0 312 0 16 0 202 0 17 0 142 0 18 0 112 0 19 0 109 0 20 0 112 0 21 0 103 0 22 0 42 0 23 0 0 0 24 0 34 0 26 0 54 0 26 0 34 0 27 46 27 0 SB 362 18 0 29 38 0 30 37 0 31 30 Second- Montn Maximum Minimum Mean Run-off in foot-days a6re-feet Oct ober 193 0 0 0 0 0 Nov 0 0 0 0 0 Dec 566 566 0 18.3 1,120 C 1,166.5 566 0 3.20 2,310 Jan uary 193Y 5.6 0 .18 11 Pet 4,361.4 1,850 0 156 8,650 Mar 1,880.5 561 0 60.7 3,730 Apr 0 0 0 0 0 May 0 0 0 0 0 Jun 0 0 0 0 0 Jul 0 0 0 0 0 Aug 0 0 0 0 0 Sep 0 0 0 0 0 W ater year 1936-37 ...... 6,813.5 1,850 0 18.7 13,510 Oct ober 193Y 0 0 0 0 0 Nov 0 0 0 0 0 Dec 0 0 0 0 0 Calendar year 1937 ...... 6,813.5 1,850 0 18.7 13,510 Jan luary 193 Q 0 0 0 0 0 Feb 900.8 362 0 32. S 1,790 Mar 42,146 14,500 0 1,360 83,600 Apr 1,346.0 270 0 44.9 2,670 May 0 0 0 0 0 Jun 0 0 0 0 0 Jul 0 0 0 0 0 Aug 0 0 0 0 0 Sep 0 0 0 0 0 Water year 1937-38 ...... 44,392.8 14,500 0 122 88,060 86 SAN GABRIEL RIVER BASIN West Fork of San Gabriel River at Camp Rincon, Calif. Location.- Water-stage recorder, lat. 34°14'30", long. 117051'50", near center of sec. 19, T. 2 N., R. 9 W., a quarter of a mile above Camp Rincon and half a mile downstream from Borth Fork of San Gabriel River. Drainage area.- 102 square miles. Records available.- October 1927 to September 1938. Extremes.- Maximum discharge during year not determined, occurred Mar. 2; minimum, 13 second-feet Oct. 20-23, 25-28. 1927-38: Maximum discharge probably occurred Mar. 2, 1938; no flow at times during 1928 and 1929. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. ' , Discharge, in second-feet, water year October 1937 to September 1938 Day Oet. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 15 15 17 28 136 1,900 330 126 82 63 194 30 2 16 14 17 28 69 17,000 330 130 80 63 188 29 3 16 14 18 27 322 8,900 320 120 80 62 219 29 4 17 14 17 26 448 3,650 315 119 78 60 232 27 6 16 14 17 26 231 1,800 320 112 77 61 248 30 6 16 15 17 25 151 1,650 302 112 77 64 267 34 7 15 16 17 24 117 1,550 276 115 76 62 266 29 8 15 15 17 24 102 1,350 241 109 78 104 270 25 9 14 15 17 166 1,950 212 108 80 148 260 28 10 14! 15 22 23 181 980 180 103 80 144 230 26 11 14 16 57 23 598 480 177 102 81 141 189 26 12 14 16 68 23 441 1,200 186 101 77 148 170 26 13 14 16 57 23 280 1,000 186 94 76 144 150 25 14 15 17 38 218 935 182 94 73 154 122 25 16 17 17 29 165 179 960 164 100 73 153 200 25 16 16 17 27 SO 156 690 164 100 75 148 280 23 17 15 17 25 55 139 670 158 100 70 146 69 24 18 14 17 24 47 139 690 156 100 72 148 55 25 19 14 17 24 45 151 720 152 98 72 149 46 25 20 13 17 41 126 660 150 93 72 141 42 24 21 13 17 22 39 115 660 144 91 69 151 40 25 22 13 17 22 36 111 750 140 93 69 187 39 25 23 13 16 53 35 108 670 135 93 68 182 36 25 24 14 17 29 33 106 670 146 90 66 177 32 24 25 13 17 25 32 102 650 150 89 68 152 30 24 26 13 18 39 31 100 620 142 88 66 49 31 24 27 13 17 52 30 197 515 132 87 65 44 31 21 28 13 17 39 30 1,310 490 122 85 66 44 30 19 29 14 17 34 32 490 130 88 67 43 32 18 30 14 17 31 29 435 124 82 65 58 33 16 33. 14 29 27 385 84 121 32 Seoond- Month Run-off in foot-days Maximum Minimum Mean acre-feet Dot 447 17 13 14.4 887 Hoi 484 18 14 16.1 960 Dec 923 68 17 29.8 1,830 Calendar year 193 47,699 1,640 12 131 84,600 Jan 1,133 165 23 36.5 2,250 Fob 6,499 1,310 69 232 12,890 Mar 55,070 17,000 3S5 1,776 109,200 Apr 5,866 330 i22 196 11,640 May 3,106 130 'W 100 6,160 Jun 2,198 82 65 73.3 4,360 Jul 3,511 187 43 113 6,960 Aug 4,063 267 30 131 8,060 Sep 756 30 16 25.2 1,500 ater year 1937-3 84,056 17,000 13 230 166,700 SAN GABRIEL RIVER BASIN 87 Rogers Creek near Azusa, Calif. Location.- Water-stage recorder, lat. 34°09'55", long. 117°54'20", In NWiNWi sec. 23, T. l N., R. 10 W., half a mile upstream from mouth and 2i miles north of Azusa. Alti tude, about 800 feet. Drainage area.- 6.4 square miles. Records available.- October 1917 to September 1938. May 1916 to June 1917, discharge measurements only. Average discharge.- 21 years, 3.03 second-feet. Extremes.- Maximum discharge during year, about 2,070 second-feet Mar. 2; no flow for part of year. 1917-38: Maximum discharge, about 2,600 second-feet Apr. 7, 1926; no flow for several months of each year. Remarks.- Records good except those for period of missing gage heights, Mar. 2-14, which were computed on basis of rainfall-run-off studies and records for nearby streams and are poor. All water diverted above station at times. Results of some discharge measurements furnished by Los Angeles County Flood Control District. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Ear. Ap*. toy June July Aug. Sept. 1 0 1.0 11 233 IB 3.5 3.1 1.3 0.2 0.1 2 0 .9 5.5 738 15 8.5 3.1 1.6 .2 .1 3 0 .S 131 202 15 7.5 3.1 1.6 .2 .1 4 0 .7 50 10S 15 7.5 3.1 1.9 .2 .1 5 0 .6 20 86 16 7 3.1 1.9 .2 .1 6 0 .4 11 62 16 7 3.5 1.9 .2 .1 7 0 .4 9.5 45 15 6.5 4.3 1.9 .2 .1 8 0 .4 9 41 14 6 3.5 1.9 .2 .1 9 0 .4 IS 41 14 6 3.1 1.9 .2 .1 10 .2 .3 16 38 13 6 3.1 1.3 .2 0 11 3.4 .3 54 28 13 6 3.1 1.0 .2 0 12 3.6 .3 42 87 14 6 2.7 .5 .2 0 13 1.0 .2 23 85 14 6 2.3 .5 .2 0 14 .6 .3 19 75 12 6 1.9 .5 .4 0 15 .6 2.4 17 69 11 5.5 1.6 .5 .4 0 16 .5 3.6 9.5 62 11 5.5 1.6 .5 .4 0 17 .4 2.3 8 51 10 5.5 1.6 .5 .4 0 18 .4 1.8 S 44 9.5 5 1.6 .5 .3 0 19 .4 1.9 S.5 37 9.5 5 2.3 .5 .3 0 20 .3 1.9 7 34 9.5 5 2.7 .5 .3 0 21 .5 1.3 6 30 9.5 4.7 2.7 .5 .2 0 22 .5 1.0 6 28 9.5 4.7 1.9 .5 .2 0 23 2.9 1.0 5.5 25 9 3.5 1.9 .5 .2 0 24 2.0 1.0 4.9 24 9.5 3.5 1.3 .5 .2 0 25 1.0 .S 4.9 23 10 3.5 1.3 .4 .2 0 26 1.5 .S 4.7 22 9.5 3.5 1.3 .4 .2 0 27 2.1 .9 S.5 19 9 3.5 1.3 .2 .2 0 28 1.3 .8 212 19 8.5 3.5 1.0 .2 .2 0 29 1.0 .8 _ 18 9 3.1 1.0 3 .2 0 50 .7 .9 _ 17 9 3.1 1.0 .2 .2 0 31 1.0 .S - 16 3.1 .2 .2 - Second- Run-off In Month foot -days *ud»» Minimum Mean acre-feet October ...... 0 0 0 0 0 0 0 0 0 0 25.9 3.6 0 .84: 51 2,441.7 127 0 6.69 , 4,850 Jan 31.0 3.6 .2 1.0 61 Pel 729.5 212 4.7 26.1 1,450 March...... 2,407 73S 16 77.6 4,770 April...... 352 15 S.5 11.7 698 166.7 S.5 3.1 5.35 329 69.1 4.3 1.0 2.30 137 July...... 26.5 1.9 .2 .85 53 7.3 .2 .2 .24 14 .9 .1 0 .03 2 Water year 1937-! 8...... 3,814.9 738 0 10.5 7,560 SAN GABRIEL RIVER BASIN Fish Creek near Duarte, Calif. Location.- Water-stage recorder, lat. 34°10'00", long. 117°55'25", in SWiSWi sec. 15, T. I N.,"H. 10 W., three-quarters of a mile upstream from mouth of canyon and 3 miles northeast of Duarte. Altitude, about 1,000 feet. Gage house and water-stage re corder destroyed by flood of Mar. 2; staff gage installed Mar. 15. Drainage area.- 6.5 square miles. Records available.- July to September 1916 and July 1917 to September 1938. Average discharge.- 21 years (1917-1938), 4.24 second-feet. Extremes.- Maximum discharge during year, 2,100 second-feet Mar. 2, by rainfall-run-off studies; minimum, 1.0 second-foot Sept. 22. 1916-38: Maximum discharge, about 2,180 second-feet Apr. 4, 1925; no flow during periods in 1919-21, 1924, 1929-30. Remarks.- Records good Oct. 1 to Jan. 11, poor Jan. 12 to Mar. 15, and fair Mar. 16 to Sept. 30. No diversion or regulation above station. Discharge for period of no gage heights,Jan. 12 to Mar. 15, computed on basis of ten measurements, records for stations on nearby streams, and rainfall-run-off studies. Results of some measure ments famished by Los Angeles County Flood Control District. Staff gage read once daily. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. NOT. Dec. Jan. Feb. Bar. Apr. May June July Aug. Sept. 1 2.1 1.7 1.5 2.2 19 267 24 10 4.8 2.4 1.8 1.2 2 2.2 1.7 1.4 2.1 9 752 23 11 5 2.7 1.8 1.2 s 2.2 1.6 1.5 1.9 140 303 23 10 5.5 3.2 1.8 1.2 4 2.2 1.6 1.5 1.9 59 135 20 7.5 5 3.5 1.8 1.2 5 2.2 1.6 1.5 2.1 23 96 22 8.5 5.5 3.7 1.8 1.2 6 '.g.]_ 1.7 1.5 1.9 12 70 20 9 5.5 3.7 1.8 1.2 7 1.7 1.5 1.9 11 61 19 10 5.5 3.7 S.I 1.5 8 .8 1.6 1.6 2.1 10 52 19 10 5.5 3.2 2.1 1.5 9 .7 1.6 1.8 1.9 20 44 19 11 5.5 3.2 2.0 1.4 10 .7 1.5 2.9 2.1 18 35 18 11 6 2.7 1.8 1.4 11 .8 1.5 13 2.2 56 33 16 14 6 2.7 1.6 1.2 12 .8 1.6 6 2.2 45 90 17 13 5.5 2.7 1.8 1.1 13 .8 1.6 2.6 2.2 25 80 16 11 5 2.6 1.8 1.1 14 .1 1.6 2.1 2.2 21 68 15 10 4.6 2.6 1.8 1.1 15 .2 1.7 1.7 12 19 58 15 9 4.6 3.0 2.0 1.1 16 .! 1.7 1.6 6 12 52 13 8 4.6 3.0 1.8 1.1 17 .7 1.7 1.6 3.9 8.5 49 12 7.5 4.6 2.7 1.8 1.1 18 .6 1.8 1.6 3.9 9 46 11 8 4.6 2.7 1.6 1.1 19 .6 1.8 1.5 3.9 9.5 46 11 8 5 2.7 1.6 1.1 20 .5 1.8 1.4 3.5 7.5 41 11 7.5 5 3.0 1.5 1.1 21 .5 1.7 1.4 3.1 6.5 40 11 7.5 5 3.0 1.1 1.1 22 .3 1.7 1.5 3.0 6.5 37 11 7.5 4.4 3.0 1.1 1.0 23 .4 1.8 6 3.0 6 34 11 7 4.4 3.0 1.1 1.1 24 .6 1.9 2.6 3.0 5.5 33 12 6 4.0 3.0 1.4 1.1 25 .7 2.1 2.5 2.8 5.5 30 13 6 3.8 S.6 1.4 1.1 26 .7 1.9 5 2.8 5 30 11 5.5 3.4 2.6 1.4 1.4 27 .7 1.9 6.5 2.6 9 28 10 5.5 2.9 2.6 1.5 1.1 28 .6 1.8 4.0 2.5 190 28 10 5.5 2.5 2.4 1.5 1.1 29 .6 1.7 3.1 2.5 - 27 11 5.5 2.2 2.4 1.5 1.1 30 .6 1.6 2.6 2.5 _ 26 11 5.5 2.2 2.4 1.2 1.1 31 .7 - 2.4 2.5 - 26 - 5.5 - 2.4 1.2 - Second- Mean Run-off In Month foot-days Haxijinm Mlnlffiun acre-feet October...... 55.7 2.2 1.3 1.80 110 November...... 51.2 2.1 1.5 1.71 102 December...... 87.4 13 1.4 2.82 173 2,984.4 142 .4 8.18 5,920 92.4 12 1.9 2 98 183 767.5 190 5 27'.4 1,520 2,717 752 26 87.6 5,390 April ...... 455 24 11 15.2 902 May...... 261.0 14 5.5 8.43 518 138.1 6 2.2 4.60 274 July...... 89.1 3.7 2.4 2.87 177 50.5 2.1 1.1 1.63 100 35.3 1.5 1.0 1.18 70 Water year 1937-J 8...... 4,800.2 752 1.0 13.2 9,520 SAN GABRIEL RIVER BASIN 89 Sawpit Creek near Monrovia, Calif. Location.- Water-stage recorder and broad-crested weir control, lat. 34°10'20", long. 117U59'25" in NWiSWl sec. 13, T. 1 N., R. 11 W., 0.2 mile downstream from confluence of two main branches and 2 miles north of Monrovia. Station destroyed by flood on Mar. 2, after which date water-stage recorder in old station 0.2 mile upstream was used. Drainage area.- 5.3 square miles above old location, 0.2 mile upstream and just below confluence of two main branches. Records available.- November 1916 to September 1938. Average discharge.- 21 years (1917-38), 1.27 second-feet. Extremes^- Maximum discharge during year, about 1,800 second-feet Mar. 2, computed on basis of inflow to flood-control dam above gage; no flow for several months. 1916-38: Maximum discharge, about 2,000 second-feet Apr. 7, 1926, estimated from flow of Rogers Creek; no flow for several months each year. Remarks.- Records fair. Discharge for period of missing gage heights, Feb. 12 to April 11, computed on basis of discharge measurements and records of inflow to and outflow from flood-control reservoir above gage, and for April 13-15, 24, May 6-27, June 9 to July 21, and July 30 to Aug. 1 computed on basis of frequent discharge measurements and records for Monrovia pipe line near Monrovia. Regulation at flood-control dam above gage and diversions by city of Monrovia. Monrovia pipe line diverts from two branches of Sawpit Creek above station (see p. 90). Results of some discharge measurements furnished by Los Angeles County Flood Control District. Discharge, In second-feet, water year October 1937 to September 1936 Day oot. HOT. Dec. Jan. Feb. Mar. Apr. ay June July Aug. Sept. 1 0 0 0 1.1 114 13 7 1.1 0.8 0.5 0.3 2 0 0 0 .5 450 13 6.5 1.1 .8 .5 .3 3 .1 0 0 11 235 13 6.5 1.1 .8 .5 .2 4 .1 0 0 19 108 13 6.5 1.1 .8 .5 .2 5 0 0 0 9.5 92 12 6.5 1.1 .8 .5 .2 6 0 0 0 8 91 12 6 1.1 .8 .5 .2 7 0 0 0 5 76 12 5 1.3 .8 .5 .2 a 0 0 0 8 37 12 4.5 1.2 .8 .5 .2 9 o 0 0 10 25 11 4.2 1.1 .8 .4 .2 10 0 0 0 1.5 24 11 4.2 1.1 .e .4 .2 11 0 1.6 0 14 22 10 4.2 X.1 .8 .4 .1 12 0 1.0 0 11 41 10 4.1 1.0 .7 .3 .1 13 0 .3 0 11 34 10 4.1 1.0 .7 .4 .1 14 0 0 0 10.5 30 10 4.1 .9 .7 .4 .2 15 0 0 .7 7 26 10 4.0 .9 .7 .4 .2 16 0 0 .3 5 24 9 4.0 .8 .7 .4 .2 17 0 0 . 1 4.5 22 9 4.0 .8 .7 .5 .2 18 0 0 .2 3.5 20 9 3.7 .7 .5 .2 19 0 0 .2 1.8 19 9 3.4 .7 .4 .2 20 0 0 .2 1.4 18 9 3.2 .7 .4 .1 21 0 0 0 1.0 17 9 3.0 .7 .4 .1 22 0 0 .5 .9 16 8.5 2.9 .7 .3 .1 23 0 .1 .4 .8 IS 8 2.8 .7 .3 .1 24 0 .1 0 .8 14 7.5 2.7 .7 .3 .1 25 0 0 0 .7 13 7 2.7 .8 .3 .1 26 0 .2 0 .6 13 6 2.7 .7 .7 .3 .1 27 0 .2 .2 10 13 6 1.6 .8 .7 .3 .1 28 0 0 .7 89 13 6 1.5 .8 .6 .3 .1 29 0 0 .1 14 6 1.4 .8 .6 .3 .1 30 0 0 0 14 7 1.3 .8 .6 .3 .1 31 0 0 13 1.1 .6 .3 Seoond-u Maximum Minimum Run-off In Month foot-days Mean acre-feet Oot 0 0 0 0 0 Hoi .2 .1 0 .01 .4 Dec 3.5 1.6 0 .11 7 C alendar year 19: 831.2 70 0 2.28 1,650 Jan 3.6 .7 0 .12 7 Fet 247.1 89 .5 8.82 490 Mar 1,666 450 13 53.7 3,300 Apr 11...... 288.0 13 6 9.60 571 Kaj 119.4 7 1.1 3.85 237 Jur 27.3 1.3 .7 .91 54 Jul 22.5 .8 .6 .73 45 Aufi 12.3 .5 .3 .40 24 Sej 4.8 .3 .1 1.6 9.5 1 ater year 1937-; 2,394.7 450 0 6.56 4,740 90 SAN GABRIEL RIVER BASIN Monrovia pipe line near Monrovia, Calif. Location.- Staff gage and weirs, lat. 34°10'00", long. 117°59'40", near southwest corner of sec. IS, T. IN., R. 11 W., 300 feet above settling reservoir at mouth of Sawpit Canyon and li miles north of Monrovia. Altitude, 970 feet. Records available.- May 1916 to September 1938. Average discharge.- 22 years, 1.30 second-feet. Extremes.- Maximum daily discharge during year, 3.7 second-feet May 27 to June 4; no flow Mar. 2 to April 14. 1916-38: Maximum daily discharge, 6.1 second-feet May 9, 1922; no flow frequently. Remarks.- Records good. Monrovia pipe line furnishes part of water supply of Monrovia. It diverts from two branches of Sawpit Creek. Most of this water is collected by tun nels driven into side of canyon. Gage-height record furnished by city of Monrovia. Discharge, In second-feet, water year October 1937 to September 1938 Day Got. HOT. Dec. Jan. Feb. Kar. Apr. May June July Aug. Sept. 1.9 0.4 1.3 0 2.6 3.7 2.8 2.6 2.4 2 2.1 2.1 1.9 1.9 1.1 0 0 2.6 3.7 2.6 2.4 3, 2.1 2.1 1.9 1.9 1.1 0 0 2.6 3.7 2.8 2.6 2.4 .9 0 0 3.7 2.6 2.4 6 2.1 1.9 1.9 .9 0 0 2.6 3.4 2.8 2.6 2.4 6 2.1 2.1 1.7 2.1 1.3 0 0 2.6 3.4 2.8 2.6 2.4 7 2.1 1.9 1.5 1.9 1.5 0 0 2.6 3.4 2.8 2.4 2.4 8 2.1 1.9 1.5 1.9 1.5 0 0 2.6 3.4 2.8 2.4 2.4 9 2.1 1.9 1.5 1.7 1.0 0 0 2.6 3.4 2.8 2.4 2.4 10 1.5 1.9 .9 0 0 2.6 3.4 2.4 2.4 11 2.1 2.1 1.3 1.9 .9 0 0 2.6 3.4 2.8 2.4 2.4 12 2.1 2.1 1.1 1.9 .9 0 0 2.6 3.4 2.6 2.4 2.4 13 0 0 2.6 3.4 2.4 2.4 14 2.1 2.1 1.9 1.9 1.1 0 0 2.8 3.4 2~.6 2.4 2.4 16 2.1 1.9 .4 1.7 0 1.3 2.8 3.4 2.6 2.4 2.4 16 2.1 2.1 2.1 1.1 2.5 0 1.3 2.8 3.4 2.6 2.4 2.4 17 2.1 2.1 2.4 2.1 1.9 0 1.1 3.0 3.4 2.6 2.4 2.4 18 2.1 s'.i 1.9 1.9 1.9 0 1.1 3.1 3.4 2.6 2.4 2.4 19 2.1 1.9 1.9 1.9 0 1.1 3.1 3.4 2.6 2.4 2.4 20 1.9 2.1 1.9 0 1.1 2.7 3.4 2.6 2.4 2.4 Si 1.9 1.9 2.2 3.4 0 1.3 3.1 3.4 2.6 2.4 2.4 22 1.9 2^1 1.9 2.0 0 1.3 3.0 3.4 2.6 2.4 2.4 23 1.9 2.1 .4 2.6 2.6 0 1.4 2.6 3.4 2.6 2.4 2.4 24 1.9 2.1 1.7 3.4 2.2 0 1.5 2.8 3.4 2.6 2.4 2.4 25 1.9 2.1 1.9 3.4 2.1 0 1.5 2. E 3.4 2.6 2.4 2.4 26 1.9 1.5 3.4 2.7 0 2.0 2.8 3.1 2.6 2.4 2.4 27 2.1 2.'l 1.7 3.4 2.5 0 2.4 3.7 3.1 2.6 2.4 2.4 28 2.1 1.9 2.6 3.4 1.1 0 2.4 3.7 3.1 2.6 2.4 2.4 29 2.1 1.9 2.2 1.9 0 3.7 3.1 2.6 2.4 2.4 30 2.1 1.9 2.1 1.9 0 2J6 3.7 3.1 2.6 2.4 2.4 31 2.1 2.0 1.9 0 3.7 2.6 2.4 Second- Run-off in Month foot -day s Maximum Minimum Mean aere-fe«t Oct 63.7 2.1 1.9 2.05 126 NOT 61.8 2'.6 1.9 2.06 123 Dec 55.0 .4 1.77 109 Calendar year 191? 761.6 4.6 .2 2.09 1,510 Jan 65.6 3.4 .4 2.12 130 Fob 45.8 3.4 .4 1.64 91 Mar 1.3 1.3 0 .04 2.6 Apr 26 2.6 0 .87 52 May 89.7 3.7 2.6 2.89 178 Jim 101.7 3.7 3.1 3.39 202 Jul 82.8 2.8 2.6 2.67 164 Augfe:::::::::::::::::::::::::::::::::::: 75.6 2.6 2.4 2.44 150 Sep 72.0 2.4 2.4 2.40 143 «ater year 1937-S 741.0 3.7 0 2.03 1,470 SAN GABRIEL RIVER BASIN San Dimas Creek near San Dimas, Calif. Location.- Water-stage recorder, lat. 34°08'45", long. 117°46'35", In SWiNEi sec. 25, T. 1 N., R. 9 W., at mouth of San Dimas Canyon, 3 miles northeast of San Dimas. Alti tude, about 1,245 feet. Drainage area.- 18.3 square miles. Records available.- December 1916 to September 1938. April to September 1916, discharge measurements only. Average discharge.- 21 years (1917-38), 4.44 second-feet. Extremes.- mximum discharge during year, about 4,250 second-feet Mar. 2; minimum, 0.1 second-foot Jan. 23-25. 1916-38: Maximum discharge, that of Mar. 2, 1938; no flow for several months nearly every year. Remarks.- Records good. Discharge for periods of missing or faulty gage heights Dec. 31 to Jan. 3, Jan. 6-15, 22-24, Feb. 18-27, Mar. 2-9 and 20-27, computed on basis of rec ords of outflow from flood-control reservoir. Flow regulated by San Dimas flood- control reservoir. San Dimas Water Co. diverts water just below gage for Irrigation. Results of several discharge measurements furnished by Los Angeles County Flood Con trol District. Discharge, In second-feet, vater year October 1937 to September 193S Day oot. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 3.0 0.8 o.s 0.2 1.6 2S1 27 14 7 7 6.5 9.5 S 3.4 .8 .s .2 .5 1,340 26 14 7 7 6.5 10 S 3.3 .S .s 1.5 1.7 750 25 14 6.S 7 7 10 4 3.3 .S .7 1.9 2.0 340 25 13 6.5 7 7 10 6 3.3 .8 .S .S 1.2 210 25 14 7 7 7 10 3 3.2 .8 .S .2 .9 110 25 9.5 7 7 7.5 10 7 3.2 .8 2.2 .2 .7 96 25 5.5 7 7 7 10 a 3.2 .8 5 .2 .6 65 25 5.5 7 7 7 12 9 3.1 .S 6 .2 1.7 62 25 5 7 7 7 14 10 3.3 .8 3.4 .2 1.3 42 25 5.5 7 7 7 14 11 3.2 .8 5.5 .2 2.8 36 24 5.5 7 6.5 7 13 12 3.0 .S 6 .2 S 8S 24 6.5 7 6.5 7 13 IS 4.6 .8 11 .2 15 115 9.5 7 7 7 6.5 12 14 5 .8 12 .2 15 127 2.1 6 7 7.5 6.5 12 IS 5 .7 4.6 1.6 15 117 2.1 6 7 7 6.5 18 16 5 .8 2.5 .5 12 93 2.2 6 7.5 7 6.5 29 17 4.9 .9 2.1 .5 12 90 2.2 6.5 7.5 7 6.5 29 18 4.S .9 2.0 .5 11 47 2.2 7 7.5 7 6.5 28 19 4.7 .8 l.S .5 10 93 2.4 7.5 7.5 7 6.5 20 20 4.7 .8 1.4 .6 S 70 2.4 7.5 7.5 7 9.5 6.5 21 4.7 .8 1.3 1.3 6 57 2.4 7.5 7.5 7 11 2.5 22 4.6 .8 1.5 .2 5 57 2.3 7.5 7.5 7 11 2.3 23 4.3 .8 4.1 .1 4 53 2.4 7.5 7.5 6.5 11 2.1 24 4.2 .8 2.7 .1 2 49 2.S 7.5 7.5 6.5 9.5 2.2 25 2.8 .S 2.0 .1 1 48 2.7 7.5 7.5 6.5 S.5 3.0 26 .9 .S 3.8 .2 2 46 l.S 7.5 7.5 6.5 9 2.9 27 .S .S 3.2 .2 15 39 4.0 11 7.5 6.5 9 2.9 28 .7 .8 2.3 .2 S7 33 10 11 7.5 6.5 9 2.5 20 .7 .8 1.9 .2 33 14 7.5 7.5 6.5 9 2.1 30 .6 .8 l.S .2 33 14 7.5 7.5 6.5 9 1.7 31 .7 1.5 .2 32 7 6.5 9 Second- Run-off In Month foot -days ^flirinnffp Minimum Mean acre-feet Oot 102.2 5 0.6 3.30 203 N07 24.1 .9 .7 .SO 48 Dec 96.3 12 .7 3.11 191 G alendar year 1937 ...... 3,799.0 114 .5 10.4 7,530 Jan uary 13.6 1.9 .1 .44 27 Feti 243.0 S7 .5 8.68 482 Mar «h...... 4,652 1,340 32 150 9,230 Apr 382.5 27 l.S 12.8 759 Ma; 254.5 14 5 S.21 505 Jim 216.5 7.5 6.5 7.22 429 Jill 212.0 7.5 6.5 6.84 420 Aug 243.5 11 6.5 7.85 4S3 Sep 314.2 29 1.7 10.5 623 1ater year 1937-3 6,754.4 1,340 .1 18.5 13,400 92 SAN GABRIEL RIVER BASIN Dalton Creek near Glendora, Calif. Location.- Water-stage recorder and broad-crested weir control, lat. 34009'2011 , long. 117"49'50", in center of sec. 21, T. 1 N., R. 9 W., at Glendora Irrigation Go's dam, a quarter of a mile above mouth, and 2i miles northeast of Glendora. Altitude, about 1,150 feet. Drainage area.- 7.5 square miles. Records available.- December 1919 to September 1938. Average discharge.- 18 years (1920-38), 1.28 second-feet. Extremes.- Maximum discharge during year, about 850 second-feet Mar. 2 (gage height, 4.90 feet), computed on basis of outflow from reservoir above station; no flow for parts of several months. 1919-1938: Maximum discharge, that of Mar. 2, 1938; no flow for several months of each year. Remarks.- Records good except those for flood period, Mar. 2-7, which are fair. Glendora Irrigation Co. diverts water above gage through 10-inch pipe line. A 12-inch pipe line diverts water Just below gage. Storage at flood-control dam about 1 mile up stream. Results of several discharge measurements furnished by Los Angeles County Flood Control District. Discharge, In second-feet, water year October 1937 to September 1938 Day Got. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0 0.9 28 9 1.5 0.6 0.6 0.2 0 2 0 0 .3 *266 8 1.7 .6 .4 .2 0 S 0 0 1.2 *219 8 1.6 *.5 .3 .2 0 4 0 0 1.3 *193 8 1.3 .5 .3 .2 0 6 0 0 .9 *122 8 1.2 .5 .8 .2 0 6 0 0 .6 *112 7.5 1.1 .5 .9 .2 0 7 0 0 .4 *76 7.5 1.0 .5 .5 .1 0 8 0 0 .3 70 7 *1.0 .5 .3 .1 0 9 0 0 1.0 54 5 *1.0 .6 .6 .1 0 10 0 0 .8 50 3.1 *1.0 .6 .5 .1 0 11 .2 0 2.3 30 3.0 *.7 .6 .5 .1 0 12 .1 0 3.0 37 2.7 *.8 .6 .3 .2 0 13 0 0 2.4 28 2.3 1.4 .5 .4 .1 0 14 0 0 2.2 28 1.8 1.3 .4 .4 .1 0 16 0 .3 1.7 30 1.6 1.1 .4 .4 .1 0 16 0 .2 1.0 30 1.6 1.2 .4 .4 .1 0 17 0 .1 .6 40 1.4 1.2 .4 .3 .1 .1 18 0 .1 .5 33 1.3 1.1 .4 .3 .1 .2 19 0 .3 .8 27 1.4 1.1 .4 .2 .1 .1 20 0 .2 .4 23 1.4 1.0 .4 .2 .1 .1 21 0 .2 .3 23 1.6 1.0 .4 .2 .1 .1 22 0 .1 .3 1.4 .8 .3 .2 0 0 23 0 .1 .3 16 1.4 .8 .3 .2 0 0 24 0 .1 .2 *12 1.6 .7 .3 .3 0 0 25 0 .1 *.2 *10 2.6 .7 .3 .3 0 0 26 0 .1 *.l *10 2.6 .6 .3 .3 0 0 27 0 .1 *.l *13 2.1 .6 .3 .2 0 0 28 0 .1 14 15 1.4 .6 .5 .2 .1 0 29 0 .1 12 1-5 .5 .4 .2 0 0 30 0 .1 11 1.6 .5 .6 .2 0 0 31 0 .1 10 .5 .2 0 Second- TI^^Timm Run-Off in Month foot-days MlnijsoB Mean aore-feet Dot 0 0 0 0 0 No, 0 0 0 0 0 Dec .3 .2 0 .01 .6 C 891.2 32 0 2.44 1,770 Jan nary 2.4 .3 0 .08 4.8 Feb 38.1 14 .1 1.36 76 Mar 1,650 266 10 53.2 3,270 Apr 107.4 9 1.3 3.58 213 Maj 30.6 1.7 .5 .99 61 Jun 13.6 .6 .3 .45 27 Jul 11.1 .9 .2 .36 22. Aug 2.9 .2 0 .09 5.8 Sep .6 .2 0 .02 1.2 1ater year 1937-38...... 1,857.0 266 0 5.09 3,680 *0age height missing; discharge computed on basis of records of inflow to and outflow from reservoir above station. SAN GABRIEL RIVER BASIN 93 San Jose Creek near Whittier, Calif. Location.- Water-stage recorder, lat. 34°01'25", long. 118°02'05", in Paso de Bartolo grant, on Workman-Mill road bridge, about 3 miles north of Whittier. Altitude, about 230 feet. Drainage area.- 85.2 square miles. Records available.- January 1929 to September 1938. Extremes.- Maximum discharge during water year 1936-37, 4,070 second-feet Feb. 14; no flow at times. Maximum discharge during water year 1937-38, 9,350 second-feet Mar. 2 (gage height, 10.3 feet); minimum, 0.3 second-feet Nov. 10. 1929-38: Maximum discharge, 13,100 second-feet Jan. 1, 1934; no flow at times. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Discharge, In second-feet, 1936-38 1936-37 D«y Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. i 0.2 0.4 0 2.8 1.0 1.0 0.9 0.6 0.8 1.0 1.1 1.0 2 .2 .2 0 .9 .4 .8 1.1 .6 .8 .4 1.1 1.0 3 .2 .2 0 .S .1 .6 1.1 .8 .8 .4 .9 .3 4 .3 .1 .1 .3 .2 .5 .9 1.1 .8 .4 1.0 .2 5 .4 .1 .3 .8 .2 .5 .9 .9 .9 .5 1.4 .5 6 .3 .1 .5 43 1,340.0 .4 .6 .6 .9 .5 1.4 .5 7 .3 .2 .3 3.5 119.0 .4 .5 .8 .8 .4 1.7 .6 8 .2 .1 .1 1.8 3.6 .4 .5 .9 .6 .4 1.3 1.0 9 .2 .1 .1 »1<4 2.5 .3 .6 .8 1.3 .3 .8 1.3 10 .3 .1 0 1.1 1.3 .3 1.0 .5 1.1 .3 .6 1.3 11 .3 .1 0 .7 1.0 .3 1.1 .5 1.7 .5 .5 1.0 12 .3 .1 .1 14 1.0 4.4 1.1 .5 1.4 .6 .8 1.4 IS .3 .1 .1 27 336 164 1.0 .6 1.0 .6 1.0 1.3 14 .2 .1 .1 1.4 1,470 8 1.0 .5 .8 .9 .8 .8 15 .2 .1 .4 .8 26 151 .6 .5 .6 .8 .5 .8 16 .2 .1 2.5 .2 5.5 154 .6 .5 1.1 .8 .6 .5 17 .4 .1 .6 0 1.9 29 .5 .4 .6 .8 .5 .5 18 .4 .1 .3 0 1.4 2.1 .6 .4 .4 1.0 .3 .5 19 .3 .1 .1 0 1 1.7 .5 .4 .4 1.0 .2 .6 20 .1 0 .1 0 .9 1.6 .5 .4 .3 .8 .2 .8 21 .1 0 .1 .6 .6 1.6 .5 .3 .3 .6 .2 .8 22 .1 0 .1 1.4 .5 165 .5 .3 .4 .8 .3 .8 23 .1 0 .1 .6 .5 16 .5 .4 .6 1.1 .5 .8 24 .1 0 .1 *6 .5 16 .5 .5 .6 1.3 .4 .5 26 .1 0 .2 1.1 45 22 .8 .9 .6 1.3 .6 .3 28 .1 0 .2 .6 .7 1.9 .9 1.1 .8 .8 .4 .6 27 .1 0 13 .2 4.3 1.3 1.0 1^1 1.1 .6 .5 1.0 2B .1 0 36 .2 3.1 1.3 1.0 1.1 1.0 .5 .6 .8 29 .2 0 11 .2 - 1.0 .8 1.0 1.1 .6 .6 .5 SO .5 0 86 7 - .9 .6 .9 1.3 1.3 .6 .6 31 .8 - 298 6.5 - .9 - .9 - 1.4 .5 - SAN CJABRIEL RIVER BASIN Discharge, in second-feet, of San Jose Creek near Whittier, Calif., 1936-38 Continued 1937-38 Day Oct. NOT. Dec. Jan. ?eb. Mar. Apr. May June July Aug. Sept. 1 0.6 0.6 0.4 0.6 156 769 1.3 2.Z 1.4 0.9 0.7 0.5 2 .6 .5 .4 .7 6 4,380 1.3 2.Z 1.3 1.3 .9 .5 S .7 .5 .4 .6 4.4 505 1.6 2.2 1.6 1.3 .9 .5 4 .6 .6 .4 .6 31 115 1.3 1.3 1.4 1.3 .7 5 .6 .6 .5 .6 2.4 32 1.4 2.2 1.4 1.4 1.1 .9 6 .6 .6 .5 .6 .8 9 1.3 l.E 2.3 1.4 1.1 .9 7 .6 .6 .5 .6 .8 3.9 1.4 l.E 2.8 .9 1.1 .9 8 .6 .6 .5 .6 .8 3.9 i.e 1.8 1.1 .9 1.1 9 .7 .6 .6 .6 193 4.4 i!e l.e 1.4 1.3 .9 1.1 10 .7 .4 .6 .6 26 3.9 1.1 i.e 2.8 1.4 .9 .9 11 .7 .5 1.4 .6 165 5.4 1.6 l.E 1.1 1.6 .9 1.1 12 .7 .6 4.0 .6 81 342 2.3 2.2 1.1 1.4 1.1 .9 13 .7 .6 .6 14 55 2.3 1.1 1.4 1.1 1.1 14 .6 .6 .5 .6 2.1 23 1.8 2.E 3.6 1.4 1.1 1.1 15 .5 .5 .5 29 1.0 7 1.8 2.E 1.6 1.6 .9 1.3 16 .5 .4 .5 3.7 .8 4.4 2.3 2.E 1.6 1.1 .9 1.1 17 .6 .5 .5 1.0 .7 2.3 1.3 2.E 1.6 .9 .7 1.1 18 .6 .4 .5 .9 .7 1.6 1.1 2.E 1.6 .9 .7 1.3 19 .6 .4 .5 .9 .8 1.6 1.6 2.Z 1.4 .9 .7 1.3 20 .5 .4 .5 .7 .8 1.6 1.8 1.4 1.8 .9 .9 1.3 21 .6 .4 .5 .7 .9 1.6 1.8 1.4 1.6 .9 1.1 1.3 22 1 9 23 .6 .4 3.4 .7 .9 1.6 1.9 1.4 1.8 .9 1.1 1.1 24 25 .5 .5 .5 .6 2.7 1.6 2.1 2.E 2.8 .9 1.1 26 .5 .5 .8 .6 1.3 1.6 2.2 2.2 4.4 1.3 1.1 27 .5 .5 4.4 .6 86 1.8 2.2 1.3. 3.4 1.4 .9 28 .5 .5 .8 .7 340 1.4 1.2 1.4 1.3 1.1 29 .5 .5 .8 .8 1.6 2.3 . r 1.3 1.1 1.3 30 .6 .5 .6 .8 1.3 2.3 , r 1.3 .9 1.1 31 .6 .6 .8 1.3 1.2 .9 Second- Month Maximum Minimum Mean Run-off in foot-days acre-feet Dot ober 193 3 ...... 7.6 0.8 0.1 0.25 15 Nov 2.5 .4 0 .08 5.0 Dec 450.5 298 0 14.5 894 C 1,147.4 298 0 3.14 2,280 January 193 7 119.3 43 0 3.85 237 Feb 3,374.5 1,470 .1 121 6,690 Mar 749.2 165 .3 24.2 1,490 Apr 22.7 1.1 .5 .76 45 May 20.8 1.1 .3 .67 41 Jun 24.9 1.7 .3 .83 49 Jul 22.7 1.4 .3 .73 45 Aug 21.9 1.7 .2 .71 43 Sep 22.6 1.4 .2 .75 45 W 4,039.2 1,470 0 13.3 9,599 Oc t ober 193 7 18.4 .7 .5 .59 36 Nov 15.2 .6 .4 .51 30 Dec 28.0 4.4 .4 .90 56 C 748.4 225 0 2.05 1,480 Jan nary 193 3 52.3 29 .6 1.69 104 Pet 1,122.8 340 .7 40.1 2,230 Mar 6,287 4,380 1.3 203 12,470 Apr 53.5 2.3 1.1 1.78 106 May 59.8 2.8 .7 1.93 119 Jun 55.0 4.4 .7 1.83 109 Jul 32.8 1.6 .7 1.06 65 Aug 30.8 1.4 .7 .99 61 Sep 30.6 1.3 .5 1.02 61 W ater year 1937-38 ...... 7,786.2 4,380 .4 21.3 15,450 SAN GABRIEL RIVER BASIN 95 Brea Creek at Fuller-ton, Calif. Location.- Water-stage recorder, lat. 33°52'25", long. 117°55'40", in San Juan Cajon de Santa Ana grant, on Ford Avenue bridge, at Fullerton, Orange County. Altitude, about 250 feet. Drainage area.- 26.4 square miles. Records available.- October 1930 to September 1938. Extremes.- Maximum discharge during year, 1,970 second-feet Mar. 2 (gage height, 9.55 feet); no flow during most of year. 1930-38: Maximum discharge, that of Mar. 2, 1938; no flow during most of each year. Remarks.- Records furnished by Orange County Flood Control District, throug Thompson, chief engineer. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0 9.5 157 2 0 0 0 944 3 0 0 .6 22 4 0 0 .8 1.8 5 0 0 0 .9 6 0 0 0 .5 7 0 0 0 .2 8 0 0 0 .1 9 .1 0 59 .1 10 0 0 12 .1 11 1.0 0 8 .1 12 0 0 8.5 2.4 13 0 0 .4 .4 14 0 0 0 .2 15 0 4.1 0 0 16 0 0 0 0 17 0 0 0 0 18 0 0 0 0 19 0 .1 .1 0 20 0 0 0 0 21 0 0 0 0 22 0 0 0 0 23 0 0 0 0 24 0 0 0 0 25 0 0 0 0 26 0 0 0 0 27 0 0 6.5 0 28 0 .1 50 0 29 c 0 - 0 SO 0 0 - 0 31 0 0 - 0 Second- Run-off in Month foot-days Maximum Minimum Mean acre-feet October...... 0 0 0 0 0 November...... 0 0 0 0 0 December...... 1.1 1.0 0 .04 2.2 1,254.6 567 0 3.44 2,490 Jan 4.3 4.1 0 .14 8.5 Pel 154.4 59 0 5.51 306 Mar 1,129.8 944 0 36.4 2,240 April...... 0 0 0 0 0 May...... 0 0 0 0 0 0 0 0 0 0 July...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Water year 1937-a 8...... 1,289.6 944 0 3.53 2,560 96 SAN GABRIEL RIVER BASIN Carbon Creek at Olinda, Calif. Location.- Water-stage recorder, lat. 33°53'20", long. 117°50'40", in San Juan Cajon Santa Ana grant, on Golden Avenue bridge, li miles south of Olinda, Orange County. Altitude, about 350 feet. Station destroyed by flood on Mar. 2, 1938. Drainage area.- 20.0 square miles. Records available.- October 1930 to March 1938. Extremes.- Maximum discharge during year, 1,760 second-feet Mar. 2 (gage height, 4.0 feet); no flow during most oi period. 1930-38: Maximum discharge, that of Mar. 2, 1938; no flow during most of each year. Remarks.- Records furnished by Orange County Flood Control District, through M. N. Thompson, chief engineer. Discharge, In second-feet, water year October 1937 to Septenber 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 2.8 46 2 0 0 3 0 .2 4 0 1.0 5 0 0 6 0 0 7 0 0 8 0 0 9 0 7.0 10 0 3.8 11 0 8.0 12 0 3.5 13 0 0 14 0 0 16 .1 0 16 0 0 17 0 0 18 0 0 19 0 0 20 0 0 21 0 0 22 0 0 23 0 0 24 0 0 25 0 0 26 0 0 27 0 2.3 23 0 15 29 .2 - SO 0 - 31 0 - Second- IHti^imipii Run-off In Month foot-clays Maximum Mean acre-feet 0 0 0 0 0 0 0 0 0 0 December...... 0 0 0 0 0 Jan .3 .2 0 .01 .6 Pet 43.6 8 0 1.56 86 11...... fig July...... The perlo 87 LOS ANGELES RIVER BASIN 97 Los Angeles River at Los Angeles, Calif. Location.- Water-stage recorder, lat. 34°04'50", long. 118°13'35", on Flgueroa Street Bridge, Los Angeles, 0.1 mile upstream from Arroyo Seco. Drainage area.- 510 square miles. Records available.- December 1929 to September 1938. Extremes.- Maximum discharge during water year 1936-37, 2,410 second-feet Feb. 14; minimum dally discharge, 0.4 second-foot Oct. 13-15, 20, Nov. 9, 11. Maximum discharge during water year 1937-38, 67,000 second-feet Mar. 2; minimum dally discharge, 0.6 second-foot Oct. 25-28. 1929-38: Maximum discharge, that of Mar. 2, 1938; no flow for several periods In most years. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Discharge, in second-feet, 1936-37 Day Oct. Nov. Dee. Jan. Feb. Mar. Apr. "«T June July Aug. Sept. 1 0.6 1.2 0.9 42 16 39 44 4.6 4.9 0.8 1.6 1.3 Z .6 .7 .9 14 13 33 58 5 3.4 .9 1.6 1.1 S .7 .7 1.2 11 8.5 28 31 4.8 3.8 1.1 1.8 .9 4 .7 .7 1.5 9 9.5 26 25 5.5 3.4 1.1 1.6 1.1 5 .7 .6 1.2 37 17 23 23 5 3.4 1.1 1.8 .9 6 .7 .6 .8 69 1,080 26 21 5 2.9 1.4 1.6 1.1 7 .7 .6 .7 12 515 28 19 4.8 2.7 2.0 1.6 1.1 8 .7 .5 .7 12 89 31 16 4.4 2.0 1.6 2.0 1.1 9 .7 .4 .7 16 53 34 14 4.1 2.2 1.6 2.0 1.1 10 .7 .6 .9 14 26 39 14 3.9 1.8 2.0 1.8 1.1 11 .6 .4 1.0 15 21 44 14 3.6 1.8 1.3 2.5 1.1 12 .6 .6 1.0 64 21 83 14 2.9 1.8 1.1 2.2 .9 IS .4 .7 1.0 38 300 286 13 2.7 2.0 1.4 2.2 .9 14 .4 .7 16 11 1,670 36 13 3.2 2.0 1.8 2.0 .9 15 .4 .9 165 9.5 323 421 12 3.2 1.8 1.3 2.0 .9 16 1.8 .9 21 6.5 155 570 13 3.4 1.8 1.4 2.0 .9 17 7 .9 1.0 8 119 121 11 3.4 1.6 1.4 2.0 .8 18 33 .9 1.0 11 95 76 9.5 3.4 1.8 1.4 1.8 .8 19 3.3 1.0 1.0 12 95 63 8.5 2.9 1.6 1.3 1.4 .8 20 .4 .7 1.2 12 95 58 7 2.7 1.4 1.3 1.4 .9 21 .6 .7 1.3 8.5 95 51 6.5 2.5 1.3 1.3 1.3 .9 22 .7 .7 1.2 9 93 374 5 2.7 .9 1.6 1.4 .9 25 .6 .7 1.2 12 95 108 6.5 2.7 .8 1.8 1.4 .8 24 .6 .7 1.3 10 118 117 6.5 2.7 .6 1.6 1.6 .8 26 .6 .7 75 7 178 139 7 2.7 .9 1.1 1.6 .6 26 .6 .7 4.7 5.5 65 91 10 3.4 1.4 2.5 1.4 .8 27 .7 .8 746 8 55 70 9.5 2.9 1.1 2.9 1.6 .9 28 .6 1.0 193 12 45 63 12 2.9 1.3 2.0 1.8 1.1 29 18 1.0 50 73 - 51 14 3.2 1.3 1.8 1.4 1.1 50 3.2 .9 252 162 - 51 4.9 3.2 1.4 1.6 1.4 .9 31 12 - 368 120 - 50 - 3.6 - 1.4 1.4 - LOS ANGELES RIVER BASIN Discharge, In second-feet, of Los Angeles River at Los Angeles, Calif,, 1936-38 Continued 1937-38 Day Oct. HOT. Dee. Jan. Peb. liar. Apr. May June July Aug. Sept. 1 1.0 1.3 13 35 598 2,300 66 65 39 10 25 30 2 1.0 1.7 12 30 111 27,900 65 65 36 10 27 30 3 1.0 1.7 9.5 25 260 8,210 64 65 29 11 30 29 4 1.0 1.8 7.5 19 242 1,790 62 70 28 12 28 32 5 .9 1.9 8 22 92 930 61 70 26 13 37 3C 6 .8 2.1 12 24 61 650 60 60 25 13 34 29 7 .7 2.1 8 24 45 600 58 50 2S 13 25 38 8 .7 2.7 8.5 23 43 900 57 45 26 13 30 37 9 .7 3.4 12 23 271 800 56 40 06 12 31 36 10 .7 3.4 25 22 110 770 55 35 23 13 40 36 11 .7 3.2 301 22 766 800 54 32 21 13 40 35 12 .7 3.0 40 21 188 1,320 53 32 20 14 39 34 13 .7 3.0 32 20 84 1,190 52 32 20 13 34 33 14 .7 3.0 29 20 65 800 51 32 22 13 29 35 15 .7 2.9 28 138 55 540 49 32 22 16 32 35 16 .7 2.9 31 39 48 360 47 32 24 19 30 33 17 .7 2.8 31 28 44 340 45 32 23 20 28 33 18 .7 2.8 27 60 45 370 43 32 22 23 25 32 19 .7 2.3 25 32 95 350 41 32 21 26 24 32 20 .7 1.9 25 33 55 350 39 32 19 24 24 32 21 .7 1.6 26 35 42 340 38 32 18 31 25 34 22 .7 1.1 27 37 41 340 37 31 16 31 40 36 23 .7 .8 84 39 40 330 37 31 16 30 46 40 24 .7 29 41 43 330 37 31 17 30 37 46 25 .6 29 43 38 180 37 30 19 34 31 37 26 .6 148 45 40 90 37 30 20 36 15 35 27 .6 47 47 252 80 37 31 25 37 18 36 28 .6 3.' 37 49 1,390 74 36 29 18 33 38 35 29 .8 8 34 5p 68 36 31 14 30 38 35 30 .9 10 37 50 68 50 29 10 29 33 38 31 1.0 43 50 67 28 27 30 Second- Month Maximum Minimum Mean Run-off In foot-days acre-feet Oct ober 193 i ...... 92.9 33 0.4 3.00 184 Hov 22.2 1.2 .4 .74 44 Dec 1,912.4 746 .7 61.7 3,790 C 4,836.2 746 .4 13.2 9,590 January 19 57 850.0 162 5.5 27.4 1,690 Peb 5,465.0 1,670 8.5 195 10,840 Mar 3,230 570 23 104 6,410 Apr 461.9 58 4.9 15.4 916 May 111.0 5.5 2.5 3.58 220 Jun 59.1 4.9 .6 1.97 117 Jul 46.9 2.9 .8 1.51 93 Aug 53.2 2.5 1.3 1.72 106 Sep 28.5 1.3 .6 .95 57 Water yea r 1936-3' 12,333.1 1,670 .4 33.8 24,470 Oct ober 193'j 23.4 1.0 .6 .75 46 Hov 77.6 10 .7 2.59 154 Dec 1,225.5 301 7.5 39.5 2,430 C 11,632.1 1,670 .6 31.9 23,080 Jamuary 193 3 1,146 138 19 37.0 2,270 Feb 5,164 1,390 38 184 10,240 Mar 53,237 27,900 67 1,720 105,600 Apr 1,460 66 36 48.7 2,890 May 1,218 70 28 39.3 2,420 Jun 671 39 10 22.4 1,330 Jill 649 37 10 20.9 1,290 Aug- 963 46 15 31.1 1,910 Sep 1,033 46 29 34.4 2,050 W 66,867.5 27,900 .6 183 132,600 LOS ANGELES RIVER BASIN 99 Los Angeles River near Downey, Calif. Location.- Water-stage recorder, lat. 33°57'05", long. 118°10'25", in San Antonio grant, on Firestone Boulevard bridge, one mile upstream from confluence with Rio Hondo, and 2i miles west of Downey, Los Angeles County. Altitude, about 100 feet. Prior to Mar. 2, 1938, water-stage recorder on Stewart and Gray road bridge 2,000 feet downstream. Drainage area.- 614 square miles. Records available.- March 1928 to September 1938. Average discharge.- 10 years, 56.4 second-feet. Extremes.- Maximum discharge during water year 1936-37, 10,100 second-feet Dec. 30; no flow at times. Maximum discharge during water year 1937-38, 79,700 second-feet Mar. 2; no flow at times. 1928-38: Maximum discharge, that of Mar. 2, 1938; no flow during parts of most years. Remarks.- Records furnished by Los Angeles County Flood Control District through H. E. Hedger, chief engineer. Discharge, in second-feet, 1936-S7 D«y Oct. Nov. Dec. Jan. Pet. Mar. Apr. May June July Aug. Sept. 1 2.6 14 3.8 181 17 42 29 0 2.8 2.8 2.8 0 2 2.6 4.6 3.7 26 23 26 59 0 1.4 2.8 2.8 2.8 3 2.7 3.3 3.7 0 17 17 26 1.4 0 1.4 5.5 2.8 4 1.9 3.3 5 0 10 17 20 2.8 2.8 1.4 5.5 2.8 5 1.7 3.6 3.0 83 37 7.5 20 2.8 2.8 0 5.5 1.4 6 2.2 3.7 2.6 256 2,250 10 24 4.1 0 0 5.5 1.4 7 2.3 4.3 3.0 50 589 2.5 24 4.1 1.4 2.8 2.8 1.4 8 2.5 4.0 3.6 0 114 5 15 1.4 1.4 2.8 0 4.1 9 2.5 3.7 4.1 13 49 10 15 0 5.5 2.8 0 4.1 10 2.6 4.1 4.4 2.5 33 7.5 7 2.8 S.8 1.4 4.1 4.1 11 1.9 4.6 4.9 0 29 0 5.5 1.4 4.1 0 1.4 4.1 12 2.2 4.9 4.4 150 15 152 9 1.4 4.1 0 0 2.8 15 2.7 4.9 3.3 83 823 577 9 1.4 2.8 1.4 2.8 2.8 14 2.7 4.7 84 10 3,460 148 7 1.4 4.1 1.4 2.8 2.8 15 2.6 4.7 798 7.5 497 988 9 0 5.5 2.8 0 1.4 16 2.3 4.7 161 0 161 634 10 0 7 1.4 0 2.8 17 91 4.6 14 5 45 131 7 2.8 7 1.4 1.4 2.8 18 90 4.6 11 17 114 79 7 2.8 5.5 0 1.4 2.8 19 37 4.6 9 26 244 79 12 0 5.5 0 1.4 1.4 20 5.5 4.7 7.5 23 226 83 9 0 2.8 2.8 1.4 2.8 21 3.3 4.3 6 13 209 115 7 4.1 2.8 3* 8 0 2.8 22 2.8 3.8 4.9 17 186 642 5.5 0 7 1)4 0 1.4 23 2.7 5 4.3 17 164 215 4.1 0 5.5 1.4 0 4.1 24 2.6 4.7 4.3 26 142 249 1.4 0 2.8 0 0 2.8 25 2.7 4.3 248 13 272 303 0 1.4 4.1 0 1.4 2.8 26 2.8 3.6 9.5 13 79 134 12 15 1.4 0 1.4 1.4 27 2.8 3.4 1,290 13 64 107 10 2.8 0 0 0 1.4 28 2.9 3.0 620 2.5 50 81 4.1 1.4 1.4 0 0 2.8 29 101 2.4 29 191 78 5.5 4.1 4.1 2.8 0 2.8 30 117 2.9 1,130 357 - 52 0 5.5 2.6 5.5 0 2.8 31 139 - 1,780 231 - 35 - 2.8 - 4.1 0 - 100 LOS ANGELES RIVER BASIN Discharge, in second-feet, of Lost Angeles River near Downey, Calif., 1936-3B Continued 1937-38 Day Oct. Nov. Dec. Jan. Peb. Mar. Apr. May June July Aug. Sept. 1 1.7 0 10 29 1,580 4,910 82 81 22 13 22 27 2 .8 .8 14 26 200 40.000 75 9E 29 7 27 34 3 0 .8 10 31 525 15,500 70 10 £ 34 9.5 31 48 4 0 3.3 5 29 41B 2,500 64 126 29 8.5 34 45 5 0 5 5 130 1,600 59 104 29 10 42 42 6 1.7 2.5 8 24 80 1,300 54 7C 29 13 52 39 7 3.3 0 11 26 72 1,000 50 42 36 9.5 34 45 8 3.3 0 10 25 71 1,500 44 27 21 9.5 26 39 9 3.3 3.3 13 S4 512 1,200 39 42 26 10 26 27 10 0 4.2 10B 26 140 1,050 34 24 26 9.5 26 26 11 .8 6 704 S9 1,300 1,000 30 34 16 11 45 21 12 3.3 5 91 38 B30 1,500 27 52 24 14 39 26 13 3.3 4.2 31 32 1,100 26 33 22 16 31 29 14 3.3 0 25 32 180 B40 39 2< 21 12 36 39 15 2.5 1.7 20 350 115 680 29 34 19 19 34 36 16 1.7 5 29 76 6B 560 31 26 16 22 45 31 17 0 1.7 24 46 56 520 27 33 17 16 56 31 18 1.7 7 18 64 60 560 26 3£ 14 21 42 36 19 3.3 8 14 61 110 550 22 34 14 27 31 45 20 2.5 7 14 40 80 540 34 23 16 26 52 21 3.3 5 15 35 55 530 29 4E 24 27 18 46 22 3.3 16 36 42 520 22 42 22 29 24 42 23 3.3 6 234 36 39 510 21 36 16 21 45 45 24 0 5 25 41 37 500 26 4E 18 12 48 70 26 3.3 6 11 60 39 250 39 17 16 34 45 26 5 7 190 76 41 130 52 2S 11 31 22 39 27 4.2 8 B6 74 400 125 52 29 7 29 18 48 SB 3.3 3.3 48 99 2,750 120 42 14 21 26 26 45 29 3.3 2.5 3B 13 B 10B 42 16 16 29 39 30 1.7 7 29 106 96 81 17 19 27 36 39 31 0 26 106 68 16 24 29 Second- Month Maximum Minimum Mean Run-off in foot-days acre-feet Oct ober 193 641.1 139 1.7 20.7 1,270 Nov 133.0 14 2.4 4.43 264 Dec 6,260 1,290 2.6 202 12,420 C 14,177 1,290 0 36.6 28,100 Jan uary 193 7 1,626.5 357 0 56.9 3,620 Peb 9,919 3,460 10 354 19,670 Mar 5,026.5 966 0 162 9,970 Apr 373.1 59 0 12.4 740 May 67.7 15 0 2.18 134 Jun 101.2 7 0 3.37 201 Jul 47.4 5.5 0 1.53 94 Aug 49.9 5.5 0 1.61 99 Sep 76.5 4.1 0 2.55 152 Water year 1936-37 ...... 24,521.9 3,460 0 67.2 48,630 Oct ober 193 7 69.9 6 0 139 Nov 116.6 6 0 3.95 235 Dec ember ...... 1,864 704 5 60.6 3,740 C alendar year 1937 ...... 19,560 3,460 0 53.6 36,790 Jan uary 193 g 1,840 350 24 59.4 3,650 Feb 10,167 2,750 37 363 20,170 Mar 81,367 40,000 86 2,625 161,400 Apr 1,268 62 21 42.3 2,520 May 1,368 126 14 44.1 2,710 Jun 637 36 7 21.2 1,260 Jul 560.5 31 7 16.1 1,110 Aug 1,041 56 16 33.6 2,060 Sep 1,178 70 21 39.3 2,340 Water year 1937-38 ...... 101,519 40,000 0 278 201,300 LOS ANGELES RIVER BASIII 101 Los Angeles River at Long Beach, Calif. Location.- Water-stage recorder, lat. 33°47'E5", long. 118°12'20", on State Street bridge at Long Beach, Los Angeles County. Drainage area.- About 1,060 square miles. Records available.- December 1928 to September 1938. Extremes.- Maximum discharge during water year 1936-37, 20,500 second-feet Feb. 14; minimum, 2.5 second-feet June 19. Maximum discharge during water year 1937-38, 99,000 second-feet Mar. 2; minimum daily discharge, 1.0 second-foot July IB. 1928-38: Maximum discharge, that of Mar. 2, 1938; no flow at times during 1929, 1930, and 1934. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Discharge, In second-feet, 1936-S7 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 4.8 11 3.5 96 114 128 33 6.5 4.8 4.8 4.1 6 2 4.8 9 7 40 35 93 96 5 5 4.8 3.5 5.5 5 5 8.5 7 24 17 68 78 5.5 4.5 3.8 3.8 5 4 4.1 8 11 12 11 45 35 6 5 3.5 3.8 4.5 5 4.8 7.5 9 14 11 24 21 7 6.5 3.8 3.3 4.1 6 5 8 6.5 364 4,190 24 20 11 5 3.8 3.0 4.5 7 4.8 7.5 5.5 59 1,520 21 20 8.5 4.5 3.8 3.5 4.1 8 5.5 5 8 24 292 21 15 9 4.5 3.5 3.5 3.5 9 6.5 4.1 9 14 118 20 14 6 4.5 3.8 3.3 3.5 10 8 4.5 9 9.5 105 17 12 5 4.8 3.8 3.5 3.3 11 6.5 6 12 6.5 42 17 11 6 3.8 4.5 3.8 3.8 12 9 4.8 11 146 23 124 11 7 4.5 4.1 3.8 4.1 13 11 6.5 9 274 803 754 10 4.8 4.5 3.B 4.5 3.5 14 12 6.5 9 45 6,800 196 9 6 4.5 5 4.8 3.8 15 17 5.5 618 23 822 1,810 9 6.5 4.5 5.5 4.8 3.8 16 17 4.5 368 16 716 1,850 8.5 5 4.5 4.5 5 3.5 17 15 4.1 59 7.5 632 750 8 4.8 4.5 4.5 6 3.5 18 51 6 12 8 819 485 6 4.5 4.1 4.5 5.5 3.5 19 63 6.5 9.5 11 1,070 320 6 5.5 2.5 4.1 6 4.5 20 5 6 9.5 9.5 1,300 209 5 5.5 3.3 3.8 6.5 3.5 21 6 3.3 11 8 1,230 118 4.1 6 3.8 3.8 7 3.5 2S 6 4.1 11 9.5 971 1,090 3.8 6.5 4.1 4.1 7 3.8 23 6.5 5.5 12 18 339 338 4.1 4.5 3.8 3.8 7 3.8 24 6.5 6.5 14 40 223 782 3.8 5 3.8 3.8 9 4.5 25 6.5 12 135 45 821 774 3.0 6.5 3.8 4.1 9.5 4.5 26 6.5 16 28 56 438 245 3.0 15 4.1 4.1 9.5 4.8 27 a 11 1,310 75 216 180 33 11 4.5 4.5 9 4.8 28 8.5 5 1,180 109 168 141 9 7 4.1 4.1 7.5 5 29 9 3.5 89 245 - 105 9 8 4.1 4.5 7 6 30 60 2.8 721 245 - 75 9 7.5 5 4.5 6.5 5.5 31 114 - 2,040 435 " 50 - 7.5 - 3.8 6.5 ~ LOS ANGELES RIVER BASIN 102 Discharge, in second-feet, of Los Angeles River at Long Beach, Calif., 1936-38 Continued 1937-38 Day Oct. Hov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 4.2 7 14 45 1,960 7.090 831 20C 27 11 26 14 2 4.2 6 14 41 282 50,000 1,400 15C 37 7 27 27 3 4.2 6 15 37 690 30,000 1,500 114 32 4.2 32 34 4 4.2 6 13 37 815 8,000 1,650 94 30 1.8 35 29 5 4.2 6 13 35 233 5,400 2,290 7£ 28 2.4 26 32 6 4.2 6 7.5 35 60 3,900 2,460 5£ 26 2.4 30 34 7 4.2 6 14 34 32 3,800 2,580 5C 24 7.5 23 32 8 4.2 7 20 29 24 4,400 2,690 32 22 3.6 21 9 4.2 7 23 22 1,370 4,800 2,600 41 18 8 11 21 10 4.2 7 94 23 450 4,100 2,060 5E 20 5.5 15 17 11 4.2 8 810 26 1,720 2,300 1,730 3C 23 11 27 15 12 4.2 9 619 41 873 2,630 1,360 42 22 7.5 14 13 4.2 8 94 39 160 2,880 784 5C 21 10 22 16 14 4.9 9 39 32 107 2,370 310 3C 21 10 11 18 15 6 7 29 596 75 2,150 266 2 r 20 7 1.2 20 16 6 7 26 72 63 1,900 288 24 20 10 3.0 21 17 6 7.5 26 47 58 1,420 255 2£ 20 10 18 23 18 5.5 10 24 58 58 1,420 233 22 18 1.0 17 26 19 5.5 9 22 114 81 1,630 222 2£ 17 3.0 16 27 20 5.5 8 20 81 50 1,130 200 2 r 16 4.2 16 29 21 4'. 2 12 21 32 45 1,060 190 3£ 16 6 15 30 22 3.0 11 23 27 41 986 352 4r 15 7 15 34 23 4.2 11 273 26 37 914 450 5Z 15 9 14 35 24 4.9 7.5 81 23 32 1,140 510 4] 15 11 14 37 25 5.5 7 39 37 22 1,190 465 3C 21 13 13 41 26 6. 5.5 237 50 26 1,210 422 2S 13 15 13 43 27 6. 8 210 58 1,140 1,130 366 34 4.9 18 12 47 28 7. 8 63 58 3,250 1,130 324 32 9 21 7.5 50 29 7 7.5 60 212 1,080 288 2"? 14 24 24 50 30 7 10 60 130 1,050 244 2 r 16 27 27 52 31 7 52 58 980 26 26 22 Second- Month Maximum Minimum Mean Run-off in foot-days acre-feet Oct ober 193 5 ...... 497.3 114 4.1 16.0 986 Ho-v 199.2 16 2.8 6.64 395 Dec 6,743.5 2,040 3.5 218 13,380 C alendar year 193 5 ...... 17,138 2,040 2.5 47.0 34,000 Jan uary 193 rj 2,488.5 435 6.5 80.3 4,940 Peb 23,846 6,800 11 852 47,300 Mar 10, 874 1,850 17 351- 21,570 Apr ii...... 509.3 96 3.0 17.0 1,010 May 209.6 15 4.5 6.76 416 Jun 130.9 6.5 2.E 4.36 260 Jul 129.8 5.5 3.5 4.19 257 Aug 171.5 9.5 3.0 5.53 340 Sep 127.7 6 3.3 4.26 253 W 45,927.3 6,800 2.5 126 91,110 Dot ober 193 7 155.8 7 3.0 5.03 309 Nov 234.0 12 6 7.80 464 Dec 3,055.5 810 7.5 98.6 6,060 C 41,932.6 6,800 2.5 115 83,180 Jan uary 193 g 2,155 596 22 69.5 4,270 Peb 13,754 3,250 22 491 27,280 Mar 153,190 50,000 914 4,942 303,800 Apr 29,320 2,690 190 977 58,160 May 1,540 200 22 49.7 3,050 Jun 600.9 37 4.9 20.0 1,190 Jul 306.5 27 l.C 9.89 608 Aug 558.3 35 1.2 18.0 1,110 Sep 889 52 14 29.6 1,760 Water year 1937-38 ...... 205,759.0 50,000 1.0 564 408,100 LOS ANGELES RIVER BASIN 103 Pacoima Creek near San Fernando, Calif. Location.- Water-stage recorder, lat. 34°20'02", long. 118°23'55", in SEiNEi sec. 24, T. 3 N., R. 15 W., 600 feet upstream from mouth of canyon and 4 miles northeast of San Fernando. Drainage area.- 27.9 square miles. Records available.- March 1916 to September 1932. Average discharge.- 20 years (1917-37), 6.13 second-feet. Extremes.- Maximum discharge during water year 1936-37, 233 second-feet Feb. 18 (gage "neIght, 4.52 feet); no flow during several periods. Maximum discharge during water year 1937-38 occurred Mar. 2 (not determined pend ing further study); no flow during several periods. 1916-38: Maximum discharge, about 1,860 second-feet Feb. 16, 1927; usually no flow for several months of each year. Remarks.- Flow partly regulated by flood-control dan above station. Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Discharge, ii i second-feet, 1936-3V Day Oct. Hov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0.9 0 0 3V 104 115 10 0.6 0.5 32 32 2 0 .9 0 0 33 104 114 6.5 0 9.5 12 29 3 0 .9 0 0 23 104 112 0 0 34 .4 32 4 0 .9 0 0 0 104 122 0 0 35 1.9 31 S 0 .9 0 .1 .1 112 126 0 5 35 2.2 31 6 0 1.0 0 .3 1.1 112 126 0 8.5 12 12 30 7 0 1.0 0 .1 38 72 128 0 5 .5 29 11 8 0 1.1 0 0 72 0 131 6 0 .5 33 .4 9 0 1.1 0 0 53 10 51 8.5 0 16 12 .1 10 0 1.0 0 0 16 16 18 0 0 36 .3 9 11 0 1.1 0 0 11 9 20 0 1.7 29 .3 27 12 0 1.1 0 .2 14 3.5 9 0 7.5 .5 .3 30 13 0 1.2 0 0 .3 6 0 0 7 .4 12 30 14 0 .5 0 0 21 19 0 0 6.5 .5 35 30 15 0 0 .2 0 45 15 0 0 0 .4 36 29 16 0 0 0 0 89 32 0 0 0 9 13 29 17 0 0 0 0 178 57 11 0 0 33 .3 27 18 0 0 0 0 216 78 12 0 2.9 33 .3 30 19 0 0 0 0 67 109 0 0 18 11 .3 30 20 0 0 0 0 186 109 0 0 18 .5 IS 27 21 0 0 0 0 176 105 0 0 8.5 .5 35 28 22 0 0 0 0 149 14 0 0 0 .5 35 28 23 0 0 0 0 183 64 0 0 0 10 23 25 24 0 0 0 0 140 72 8 0 0 34 36 28 25 0 0 0 0 64 62 8 0 11 34 37 27 26 0 0 0 0 100 99 0 0 33 12 32 27 27 0 0 .3 0 100 102 0 0 33 .4 33 10 28 0 0 0 0 101 104 0 2.5 12 24 33 0 29 0 0 0 :3 - 103 0 8 .5 34 22 0 30 2.4 0 .3 .3 - 103 0 7.5 .5 32 4.9 0 31 1.6 - 0 15 - 96 - 6.5 - 33 22 - 104 LOS ANGELES RIVER BASIN Discharge, in second-feet, of Pacoima Creek near San Fernando, Calif., 1936-38--Continued 1937-38 Day Oct. HOT. Dec. Jan. Pel). Mar. Apr. May June July Aug. Sept. 1 0.1 25 14 0 o.: 21 12 0 0.7 0 24 14 0 11 8 12 .9 .7 .1 23 14 0 8 8 12 6 .6 4 0 22 13 0 7 21 12 6.5 .6 5 0 22 14 0 13 21 11 6 .6 6 0 22 8 0 28 17 11 5 .7 7 0 21 13 0 28 17 11 4.0 .7 8 0 22 13 0 27 15 11 3.1 .5 9 0 22 13 0 25 15 11 2.6 .3 10 0 22 15 0 26 15 11 2.3 .3 11 0 22 12 0 24 15 8.5 2.1 .3 12 0 23 12 0 23 15 7.5 1.9 .3 13 0 9 15 0 19 15 12 1.7 .8 14 0 0 15 0 34 14 8 1.7 1.4 15 0 0 18 0 46 14 2.0 1.6 .9 16 0 0 16 0 49 14 .7 1.0 .9 17 0 22 17 0 26 13 0 0 .6 18 0 7.5 14 0 26 14 0 1.4 .5 19 0 18 9.5 0 26 14 0 1.7 .7 20 0 15 3.8 0 26 13 0 1.4 .9 21 0 15 1.0 0 43 13 0 1.3 1.7 22 0 14 .6 0 51 14 0 1.2 9.5 23 0 15 0 0 45 13 0 1.1 .9 24 0 14 0 0 33 13 0 1.0 .3 26 .1 15 0 0 25 13 0 .9 .3 26 o' 15 0 0 31 13 0 .8 .2 27 15 0 0 29 12 0 .8 .4 28 0 10 0 0 28 13 0 .8 .4 29 8 8.5 0 0 26 13 0 .8 .3 50 24 16 0 0 24 12 0 .7 .3 31 24 0 0 22 0 .7 Second- Month Maximum Minimum Mean Run-off In foot-days acre-feet Oct ober 1936 ...... 4.0 2.4 0 0.13 7.9 NO'7 13.6 1.2 0 .45 27 Dec .8 .3 0 .03 1.6 C alendar year 1936 ...... 1,537.0 57 0 4.21 3,050 Jan Mary 193rj 16.3 15 0 .53 32 Pet 2,113.5 216 0 75.5 4,190 Mar 2,099.5 112 0 67.7 4,160 Apr 1,111 131 0 37.0 2,200 Haj 55.5 10 0 1.79 110 Jun 184.6 33 0 6.15 355 Jul 510.7 36 .' 16.5 1,010 Aug 563.2 37 o'" 18.2 1,120 Sep 667.5 32 22.2 1,320 Water year 1936-37 ...... 7,340.2 216 0 20.1 14,530 Oct ober 1937 56.4 24 0 1.82 112 NOD 479 25 0 16.0 950 Dec 264.9 18 0 8.54 525 C 8,126 216 0 22.3 16,100 Jan nary 1938 0 0 0 0 0 Fob Mar Apr May 829.1 51 .1 26.7 1,640 Jan 428 21 8 14.3 849 Jul 152.7 12 0 4.92 303 Aug 61.0 6.5 0 1.97 121 Sep 27.3. 9.5 .2 .91 54 Water year 1937-38 ...... - - 0 - _ Mote.- The figures of discharge for the months of February, March, and April 1933 have been withheld pending further study. LOS ANGELES RIVER BASIN 105 Tujunga Creek near Colby ranch, Calif. Location.- Water-stage recorder, lat. 34°18'10", long. 118°09'35", 25 feet upstream from crossing of Edison road, 300 feet downstream from Lucas Creek, 34 miles west of Colby Ranch and 4 miles upstream from Tujunga flood-control dam No. 1. Drainage area.- 66.9 square miles. Records available.- October 1930 to September 1938. Extremes.- Maximum discharge during water year 1936-37, 1,030 second-feet Feb. 6 (gage Height, 10.85 feet); no flow Oct. 1-15 and Nov. 4. Maximum discharge during water year 1937-38 not determined, occurred on Mar. 2; minimum, 0.8 second-foot Oct. 1-3. 1930-38: Maximum discharge probably occurred on Mar. 2, 1938; no flow part of each year except 1937. Remarks.- Records furnished by the Los Angeles County Flood Control District, through H. £. Hedger, chief engineer. Discharge, in second-feet, 1936-37 Day Oct. HOT. Dec. Jan. FeD. Mar. Apr. May June July Aug. Sept. 1 0 0.4 0.6 20 12 54 86 24 12 3.5 1.6 0.8 2 0 .4 .6 11 12 54 92 22 11 3.3 1.6 .8 5 0 .1 .5 8.5 12 54 84 21 11 3.0 1.4 .8 4 0 0 .5 8.5 12 54 77 21 10 2.8 1.3 -8 5 0 .2 .6 10 14 50 70 21 11 2.8 1.3 .8 6 0 .2 .5 16 438 47 65 20 11 2.4 1.2 .8 7 0 .2 .6 11 432 44 62 20 10 2.4 1.2 .8 8 0 .2 .7 12 128 40 59 20 10 2.4 1.1 .8 9 0 .2 .7 10 79 36 56 20 10 2.2 1.0 .7 10 0 .2 .7 10 58 33 52 19 9.5 2.2 1.0 .7 11 0 .2 .7 8 46 32 50 18 9.5 2.1 1.0 .7 12 0 .3 .8 8.5 45 129 47 18 9 1.9 1.0 .7 13 0 .4 .7 8.5 144 395 45 17 8.5 1.9 .9 .8 14 0 .4 .9 7 707 225 42 16 8.5 1.9 .9 .8 15 0 .4 11 7 325 208 40 15 8 2.1 .9 .8 16 .2 .4 14 7 156 333 39 15 7.5 2.1 .9 .7 17 .4 .4 4.0 7 116 195 38 15 7.5 2.1 .9 .7 18 4.6 .3 2.4 7 96 151 36 14 7 2.1 .9 .7 19 1.0 .4 2.8 7 81 112 34 15 7 2.1 .8 .8 20 1.0 .4 3.5 6.5 66 92 32 14 6 1.9 .8 .8 21 .4 .4 2.8 5 59 84 32 14 6 1.9 -8 .8 22 .4 .4 2.2 5.5 55 110 30 14 5.5 1.8 .8 1.1 23 .3 .4 1.3 5.5 52 102 30 14 5.5 1.8 .9 1.1 24 .3 .5 .3 5 52 119 28 14 5 1.8 .9 1.0 25 .3 .6 1.3 4.8 69 100 27 15 5 1.7 .9 .9 26 .3 .5 .4 4.8 56 100 26 16 4.6 1.6 .8 .8 27 .3 .5 112 4.8 56 106 26 14 4.4 1.4 .7 -8 28 .2 .6 56 6 56 107 26 14 4.4 1.4 .7 .7 29 .2 .6 14 10 _ 99 25 14 4.2 1.4 .7 .7 30 .5 .6 32 21 _ 92 83 14 3.8 1.7 .8 .6 31 1.7 - 100 19 - 87 - 13 - 1.7 .8 - 106 LOS ANGELES RIVER BASIN Discharge, in second-feet, of Tujunga Creek near Colby ranch, Calif., 1936-3B Continued 1937-38 Day Mar. Apr. May July Aug. Sept. 46 870 11 5.5 3.7 18 8,200 11 5 4.3 1.6 67 1,600 11 5 4.0 1.6 1.8 110 690 11 5.5 4.0 1.6 1.9 44 450 11 5 4.0 1.5 28 330 10 5.5 4.0 1.8 22 255 10 5.5 4.0 1.0 1.6 1.9 20 205 9.5 6 4.0 1.0 1.6 1.6 44 175 8-5 3.7 1.0 1.6 1.8 74 150 8.5 3.7 1.0 1.6 517 130 4.9 3.7 1.1 1.5 8.5 208 580 4.6 4.0 1.1 1.4 5.5 390 7.5 4.3 3.7 1.1 1.5 4.5 285 7 4.3 3.7 1.5 4.5 240 6.5 4.9 1.1 1.5 210 7 5 1.1 1.4 195 7 4.9 1.1 1.5 180 7 5.5 5 1.1 1.5 165 5 4. 1.2 1.5 150 4.9 4.3 1.5 26 140 4.0 1.2 1.4 24 130 3.5 1.2 1.4 8.5 22 125 6 4.6 3.5 1.4 1.5 6 20 120 6 4.0 3.7 1.4 1.6 5.5 20 115 6.5 4.0 3.7 1.4 8.5 19 110 3.7 3.2 1.4 1.8 11 87 106 3.2 3.2 1.4 1.8 8.5 420 102 3.7 3.5 1.5 1.8 7 5.5 3.7 3.7 1.5 1.6 7 5 3.7 3.5 1.6 6.5 4.8 3.5 Second- Month Run-off in foot-days acre-feet October 1936 ...... 12.1 4.6 0.59 24 November...... 10.8 .6 .36 21 December...... 369.1 112 11.9 732 Calendar year 1936 ...... 1,485.5 40.7 2,950 January 1937 ...... 281.9 21 9.09 559 February...... 3,434 707 12 123 6,810 March...... 3,444 395 32 111 6,830 April...... 1,379 92 23 46.0 2,740 May...... 521 24 13 16.8 1,030 June...... 232.4 12 3.8 7.75 461 July...... 65.4 3. 1.4 2.11 130 August...... SO.5 1. .7 .98 60 September...... 23.8 1. .6 .79 47 year 1936-37 ...... 9,804 26.9 19,440 October 1937 ...... 35.2 1.6 1.14 70 November...... 47.0 1-8 1.4 1.57 93 December...... 147.3 11 1.6 4.75 292 Calendar year 1937 ...... ___9,641.5 26.4 19,120 January 1938 ...... 207-8 22 4.8 6.70 412 February...... 2,243 517 18 80.1 4,450 March...... 16,666 ,200 84 538 33,060 April...... 1 83 40 56.6 5,570 May...... 906 39 23 29.2 1,800 June...... 534 22 11 17.8 1.060 July...... 240.5 11 6 7-76 477 August...... 145.1 6 3.2 4.68 288 September...... 114.3 3.2 3.81 227 Water year 1937-38 ...... 22,984.2 63.0 45,600 LOS ANGELES RIVER BASIN 107 Tujunga Creek near Sun"1 and, Calif. Location.- Water-stage recorder, lat. 34°17t 55", long. 113°16'10", near center of sec. 32, T. 3 N., R. 13 1. (unsurveyed), a quarter of a mile downstream from a partly constructed and abandoned dam, 2 miles upstream from mouth of canyon, and 4 miles northeast of Sunland. Drainage area.- 106 square miles. Records available.- October 1916 to September 1938. Average discharge.- 21 years, 27.2 second-feet. Extremes.- Maximum discharge during year ending Sept. 30, 1937, 495 second-feet Dec. ay; minimum, 0.8 second-foot Nov. 18. Maximum discharge during year ending Sept. 30, 1938, not determined, occurred Mar. 2; maximum daily discharge, 13,000 second-feet Mar. 2; minimum discharge, 2.5 second- feet Dec. 17. 1916-38: Maximum discharge not determined, occurred Mar. 2, 1938; maximum daily, that of Mar. 2, 1938, summer months of 1919, 1924, 1928-31. Remarks.. - Flow regulated by flood-control dam 7 miles upstream. Two or three small di- versions for Irrigation above gage. Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Discharge, In second-feet, 1936-38 1936-37 D»y Oct. MOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 3.8 4.8 1.7 26 25 168 175 32 17 19 26 30 2 3.5 3.8 1.7 19 21 159 173 34 16 19 26 30 S 3.0 3.0 1.6 16 17 15V 173 36 17 19 27 29 4 2.2 1.8 1.7 13 16 154 175 26 18 19 27 29 5 2.8 1.7 l.ff 15 14 130 175 14 21 18 27 28 6 5 1.6 1.6 27 126 46 130 17 22 19 27 28 7 4.0 1.4 1.7 22 246 44 73 23 19 19 27 28 8 4.2 1.0 1.8 17 218 43 78 22 25 19 27 28 9 4.2 1.2 1.8 16 181 45 82 22 22 19 26 27 10 2.2 1.1 2.0 12 216 44 79 22 20 19 25 27 11 1.7 1.1 2.0 11 13B 43 78 24 18 19 25 27 12 1.8 1.1 2.8 11 106 81 76 27 18 18 25 27 IS 2.0 1.0 2.2 14 148 158 64 27 17 18 25 2V 14 7.5 1.0 2.8 9 205 90 511 22 17 18 26 26 15 5 1.1 22 7.5 308 121 37 12 16 20 26 26 16 V.5 1.1 9 9 412 231 24 12 16 22 26 25 17 7.5 1.1 5.5 10 423 285 23 14 16 22 26 25 18 11 1.0 3.8 10 423 340 22 21 14 22 27 24 19 7.5 1.0 3.2 12 397 345 20 21 13 20 27 24 20 8 1.1 2.2 17 333 332 18 21 12 18 2V 23 21 15 1.1 2.2 21 351 315 18 21 10 17 28 22 22 IE 1.1 2.2 20 309 314 16 22 10 19 28 22 2S 12 1.1 2.0 19 208 280 16 22 9.5 24 29 22 24 12 1.2 2.0 18 227 288 16 23 12 24 30 21 26 11 1.2 11 19 90 247 16 24 18 24 30 22 26 11 1.1 4.0 20 15E 259 16 24 18 25 30 22 27 12 1.1 200 20 181 253 17 24 19 25 30 22 28 5 1.2 90 20 170 248 17 25 20 25 30 22 29 3.5 1.4 34 25 - 210 20 23 20 26 30 22 30 3.0 1.6 48 73 _ 179 30 22 19 26 30 22 31 9.5 - 164 42 - 177 22 25 30 - 108 LOS ANGELES RIVER BASIN Discharge, In second-feet, of Tujunga Creek near Sunland, Calif., 1936-38 Continued 1937-38 Day Oct. Hov. Dec. Jan. Peb. Mar. Apr. May June July Aug. Sept. 1 22 7.5 4.0 4.5 38 763 159 79 36 14 70 11 2 22 6 3.8 4.2 22 13,000 157 11 36 34 78 10 5 22 6.5 3.8 4.2 98 3,700 154 22 37 36 72 10 4 22 5.5 3.8 4.5 79 1,276 150 20 43 36 70 10 e 22 4.5 4.0 4.8 62 841 168 IS 43 58 60 10 6 21 4.5 4.0 4.5 50 910 190 18 42 89 47 10 7 21 4.5 4.0 4.5 46 1,216 186 18 40 90 43 10 8 21 7 4.0 4.2 42 886 140 IE 40 99 36 10 9 22 9.5 3.7 4.2 38 692 105 17 39 107 33 10 10 27 8.5 2.7 4.5 24 445 105 17 106 19 10 11 27 8 21 4.5 206 280 105 17 38 113 17 9.5 12 26 7.5 6 4.5 147 600 105 16 38 125 16 9.5 13 24 7.5 4.8 4.5 96 643 105 IS 37 116 14 9 14 24 6.5 4.0 4.5 86 475 105 22 37 106 14 9 15 23 6 3.2 17 94 440 90 2£ 37 106 15 9 16 23 5 2.8 9.5 48 520 49 42 34 112 18 8.5 17 22 4.8 2.5 6.5 62 510 48 60 34 112 19 8.5 18 22 4.5 4.4 6 59 380 38 66 33 112 19 9.5 19 20 4.5 4.9 7.5 46 340 31 94 32 112 18 9.5 20 19 4.2 4.9 7 69 300 27 8S 32 112 16 9 21 18 4.2 4.1 6.5 68 300 27 4E 32 110 16 9 22 17 4.2 14 6 66 260 26 4C 32 107 14 8.5 25 17 4.2 11 6 67 230 24 4C 33 105 13 8 24 17 4.0 6 6 68 240 28 36 31 101 12 8 25 17 4.0 6 6 64 130 30 3-S 29 97 11 7.5 26 21 4.0 9.5 6 62 230 24 34 28 92 11 7.5 27 22 3.8 7.5 6 50 230 22 31) 25 88 11 7.5 28 19 3.8 6 6 206 200 21 8C 16 62 11 8 29 17 4.0 5.5 7 160 23 BE 15 68 11 8 50 17 3.8 5 6.5 160 40 3£ ! 14 72 12 8 51 10 4.5 6 164 36 70 11 Second- Montli Maximum MiniMUtt Mean Run-off In foot-days acre-feet Dot ober 193 s ...... 200.4 15 1.7 6.46 397 Hov 44.1 4.8 1.0 1.47 87 Dec 632.1 200 1.6 20.4 1,250 Calendar year 1936 ...... 3,631.8 200 1.0 9.95 7,200 Jan uary 1937 590.5 73 7.E 19.0 1,170 Peb 5,661 423 14 202 11,230 Mar 5,786 345 43 187 11,480 Apr 1,908 175 16 63.6 3,780 May 701 36 12 22.6 1,390 Jun 509.5 25 9.5 17. O 1,010 Jul 646 26 17 20.8 1,280 Aug 850 30 25 27.4 1,690 Sep 757 30 21 25.2 1,500 Water year 1936-37 ...... 18,285.6 423 1.0 50.1 36,260 Dot ober 193 rj 644 27 10 20.8 1,280 Hov 162.5 9.5 3.8 5.42 322 Dec 175.4 21 2.5 5.66 34E C alendar 18,390.9 423 1.0 50.4 36,480 Jan uary 193 g 183.6 17 4.2 5.92 364 Peb 2,063 206 22 73.7 4,090 Mar 30,521 13,000 130 985 60,540 Apr 2,482 190 21 82.7 4,920 May 1,228 94 16 39.6 2,440 Jun 1,001 43 14 34.3 1,990 Jul 2,767 125 14 89.2 5,490 Aug 827 78 11 26.7 1,640 Sep 272 11 7.5 9.07 540 W 42,326.5 13,000 2.5 116 83,960 LOS ANGELES RIVER BASIN 109 Fox Creek near Colby ranch, Calif. Location.- Water-stage recorder, lat. 34°18'20", long. 118°10'40", half a mile upstream from confluence with Tujunga Creek and 4 miles west of Colby ranch, Los Angeles County. Drainage area.- 9.35 square miles. Records available.- October 1930 to September 1937. Extremes.- Maximum discharge during water year 1936-37, 270 second-feet Dec. 27; no flow at times. 1930-37: Maximum discharge, 410 second-feet Feb. 2, 1936; no flow at times. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Discharge, In second-feet, water year October 1936 to September 193V Day Oct. HOT/ Dec. Jan. Pet. Mar. Apr, May June July Aug. Sept. 1 0 0.1 0.1 £ . 9 3.3 11 18 8 3.9 1.2 0.2 0.2 2 0.1 .1 .1 E.'o 2.9 9.5 19 7 3.7 1.2 .2 .2 3 0 .1 .1 2.V 2.9 9.5 17 7 3.3 1.1 .2 .2 4 0 .1 .2 3.3 2.9 9.5 17 6.5 3.3 1.0 .2 .2 6 0 .1 .2 3.3 3.1 9 16 6.5 3.3 1.0 .2 .2 6 0 .1 .2 3.1 82 8.5 16 6.5 3.3 1.0 .2 .2 7 0 .1 .2 2.5 117 8.5 15 6.5 3.1 1.0 .2 .2 8 0 .1 .2 2.2 44 7.5 15 6 3.1 .9 .2 .2 9 0 .1 .2 2.0 24 7 14 6 2.9 .8 .2 .2 10 0 .1 .2 1.8 16 7 13 6 2.V .8 .1 .1 11 0 .1 .2 1.8 11 6.5 13 6 2.7 .7 .1 .1 12 0 .1 .3 1.8 15 14 12 5.5 2.5 .7 .1 .1 13 0 0 .3 2.0 17 28 12 5.5 2.3 .7 .1 .2 14 0 0 .3 1.8 56 14 11 5.5 2.3 .7 .1 .2 16 .1 0 1.1 2.0 40 19 11 5 2.2 .7 .1 .2 16 .1 0 .6 2.2 30 22 11 5 2.2 .V .1 .1 17 .1 0 .3 2.2 27 20 10 5 2.0 .7 .1 .1 18 .6 .1 .3 2.0 27 21 10 5 2.0 .6 .1 .1 19 .1 .1 .2 2.0 23 20 10 5 2.0 .6 .1 .2 20 .1 .1 .2 2.0 19 19 9.5 4.7 1.8 .5 .1 .2 21 .1 .1 .2 2.0 16 18 9.5 4.5 1.7 .4 .1 .2 22 .1 .1 .2 1.8 15 22 9 4.5 1.7 .4 .1 .2 23 .1 .1 .2 1.7 13 19 9 4.5 1.6 .4 .2 .2 24 .1 .1 .2 1.6 14 20 9 4.2 l.V .4 .2 .2 25 .1 .1 .4 1.6 15 20 9 4.2 1.7 .4 .2 .2 26 .1 .1 .2 1.6 13 20 9 4.5 1.6 .3 .1 .2 27 .1 .1 25 1.6 12 20 8.5 4.1 1.4 .3 .1 .2 28 .1 .1 8 1.4 11 20 9 4.1 1.4 .3 .2 .2 29 .1 .1 2.5 2.0 20 8.5 4.1 1.3 .3 .2 .2 30 .1 .1 11 6 19 8 4.1 1.2 .3 .2 .2 31 .4 10 4-7 19 3.9 .3 .2 Seoond- Run-off In Month foot-days Maximum Minimum Mean acre-feet Oet 2.6 0.6 0 0.08 5.2 Not 2.5 .1 0 .08 5.0 Dec 63.4 25 .1 2.05 126 C alendar year 1956...... 444.8 32 0 1.22 883 Jan 71.6 6 1.6 2.31 142 Pel 672.1 117 2.9 24.0 1,330 Mar 48V. 5 28 6.5 15.7 96V Api 358.0 19 8 11.9 710 Ma, 164.9 8 3.9 5.32 327 JUD 69.9 3.9 1.2 2.33 139 Jul 20.4 1.2 .3 .66 40 Aug 4.7 .2 .1 .15 9.3 Sep 5.4 .2 .1 .18 11 1ater year 1936-3 1,923.0 117 0 5.2V 3,810 110 LOS ANGELES RIVER BASIN Little Tujunga Creek near San Fernando, Calif. Location.- water-stage recorder, lat. 34°16'30", long. 118022'20", in Tujunga grant, on Foothill Boulevard bridge, 4 miles east of San Fernando, Los Angeles County. Drainage area.- 21.0 square miles. Records available.- December 1928 to September 1938. Extremes.- Maximum discharge during water year 1936-37, 964 second-feet Feb. 14 (gage height, 4.75 feet); no flow during most of year. Maximum discharge during water year 1937-38, 8,500 second-feet Mar. 2; no flow during most of year. 1928-38: Maximum discharge, that of Mar. 2, 1938; no flow during most of each year. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Heager, chief engineer. Discharge, In second-feet, 1936-38 1936-37 Day Oct. Nov. Dec. Jan. fell. Mar. Apr. May June July Aug. Sept. 1 0 8 9.5 15 16 2.1 0-7 2 0 2.9 3.8 9.5 12 2.1 .4 S 0 .6 3.5 9 9.5 1.8 .4 4 0 .1 2.1 8.5 8.5 1.8 .7 5 0 .1 6.5 9 7.5 2.1 1.0 6 0 6 172 8 7 2.1 .6 7 0 .2 149 7.5 7 2.1 .4 8 0 .2 36 6.5: 7 1.8 .4 9 0 3.2 33 4.6 7.5 2.1 .4 10 0 2.2 24 4.6 8.5 2.1 .4 11 0 .2 23 6 9 1.8 .4 12 0 1.3 26 14 7 1.7 .3 13 0 1.5 39 34 7 1.5 .3 14 0 .7 175 21 6.5 1.1 .3 15 0 .4 43 32 7.5 1.3 .2 16 0 .2 34 31 9 1.3 .2 17 0 .1 41 23 11 1.3 .2 18 0 .1 51 16 8.5 1.3 .1 19 0 0 52 29 7 1.1 .1 20 0 0 47 21 6.5 1.0 .1 21 0 0 43 21 6 1.1 0 22 0 0 40 33 4.6 1.4 0 23 0 0 ' 31 23 4.3 1.8 0 24 0 0 26 33 3.8 1.7 "I 25 0 0 31 36 3.5 1.7 0 26 0 0 21 26 3.5 1.7 0 27 6.5 0 17 23 3.8 1.5 0 28 6 0 15 23 3.5 1.5 0 29 40 2.4 . 21 2.7 1.7 0 50 145 44 . 19 2.4 1.7 0 31 60 24 - 20 - 1.3 0 LOS ANGELES RIVER BASIN 111 Discharge, in second-feet, of Little Tujunga Creek near San Fernando, Calif., 1936-38 Continued 1937-38 Day Oot. Nov. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0.1 7 209 8.5 3.8 1.6 2 0 .1 1.5 1,300 8 3.3 1.6 5 0 .1 36 750 7.5 2.9 1.5 4 0 .1 22 275 7 2.5 1.5 5 0 .1 5.5 123 6.5 2.1 1.5 6 0 0 3.2 93 6.5 2.3 1.5 7 0 0 1.3 76 6.5 2.4 1.5 8 0 0 1.1 62 6.5 2.6 1.5 9 0 0 3.5 51 6.5 2.7 1.5 10 0 0 4.3 45 6.5 2.9 1.4 11 .8 0 71 41 6.5 3.0 1.3 12 .3 0 28 95 6.5 3.1 1.2 13 0 0 15 139 6.5 3.0 1.1 14 0 0 9 108 6 2.8 1.0 15 0 1.6 7.5 84 6 2.7 .9 16 0 .4 6 71 6 2.6 .8 17 0 .3 4.1 61 6 2.5 .7 IS 0 .4 4.6 52 6 2.3 .6 19 0 .4 3.8 45 6 2.2 .5 20 0 .3 1.7 39 5.5 2.1 .4 21 0 .2 1.4 34 5.5 2.0 .3 22 0 .2 1.3 29 5.5 2.0 .2 25 2.3 .2 1.1 25 5.5 1.9 .1 24 .3 .1 1.0 22 5.5 1.8 0 25 .2 .1 1.0 19 5.5 1.8 0 26 .5 .1 .8 16 5 1.7 0 27 .3 .1 4.4 14 5 1.6 0 28 .1 .1 64 12 5 1.6 0 29 .1 .1 11 4.6 1.6 0 30 .1 .2 9.5 4.2 1.6 0 31 0 .2 9 1.6 Second- Month Maximum Minimum Mean Run-off in foot-days acre-feet Oot ober 193 0 0 0 0 0 HOD 0 0 0 0 0 Dec 257.5 145 0 8.31 511 Calendar year 193 6- ...... 735.4 145 0 2.01 1,440 Jan uary 193y 93.4 44 0 3.17 195 Pet 1,194.4 175 2.1 42.7 2,370 Mar 586.2 36 4.6 18.9 1,160 Apr 207.6 16 2.4 6.92 412 Maj 50.6 2.1 1.0 1.63 100 Jur 7-6 1 0 .25 15 Jul 0 0 0 0 0 Aug 0 0 0 0 0 Sep 0 0 0 0 0 VI ater yea r 1936-3 7...... 2,402.3 175 0 6.58 4,760 Oot ober 193 w 0 0 0 0 0 No-s 0 0 0 0 0 Dec 5.0 2.3 0 .17 10 C 2,149.3 175 0 5.S9 4,260 Jan tuary 193 5.6 1.6 0 .19 11 Feb 311.1 71 .8 11.1 617 Mar 3,919.5 1,300 9 126 7,770 Apr 182.3 8.5 4.2 6.08 362 May 73.0 3.8 1.6 2.35 145 Juc 24.2 1.6 0 .81 48 Jul 0 0 0 0 0 Aug 0 0 0 0 0 Sep 0 0 0 0 0 VI 4,520.7 1,300 0 12.4 8,960 112 LOS ANGELES RIVER BASIN Halnes Creek near Tujunga, Calif. Location.- Water-stage recorder and broad-crested weir control, lat. 34°15'50", long. 118"16'15", in SWjNEi see. 17, T. 2 N., R. 13 W., 800 feet upstream from mouth of canyon and li miles northeast of Tujunga. Altitude, about 2,200 feet. Drainage area.- 1.2 square miles. Records available.- February 1917 to September 1934 and October 1935 to September 1938. Average discharge.- 20 years, 0.14 second-foot. Extremes.- Maximum discharge during year, 265 second-feet Mar. 2, from rating curve ex- tended above 3.2 second-feet on basis of velocity-area studies; no flow for several months. 1917-34, 1935-38: Maximum gage height, 11.0 feet Jan. 1, 1934 (discharge not de termined); no flow for periods nearly every year. Remarks.- Records good except those for flood period.Mar. 2-6, which are fair. Discharge for periods of missing gage heights,Mar. 5, 6, Apr. 3-7, and July 8-16, computed on basis of records for nearby streams. Discharge, In second-feet, water year October 1937 to September 1938 Day Oet. HOT. Dec. Jan. Pep. Mar. Apr. May June July Aug. Sept. 1 0 0.27 8 0.93 0.7 0.39 0.35 0.17 0.04 2 0 .01 70 1.0 .7 .35 .35 .15 .04 3 0 1.4 30 1.0 .7 .35 .35 .21 .04 4 0 .13 12 .95 .7 .35 .35 .21 .05 5 0 0 6.5 .95 .8 .32 .35 .17 .04 6 0 0 4.3 .9 .8 .32 .35 .19 .05 7 0 0 3.4 .9 .7 .35 .32 .17 .05 8 0 0 3.1 .78 .7 .35 .32 .17 .05 9 0 .29 2.1 .78 .69 .35 .32 .19 .04 10 0 .35 1.6 .83 .69 .35 .32 .17 .04 11 0 4.0 1.6 .78 .69 .35 .32 .15 .04 12 .01 .8 2.8 1.0 .64 .35 .29 .15 .04 13 .02 .15 3.3 1.0 .64 .35 .29 .13 .05 14 .03 .04 2.4 .78 .60 .35 .29 .15 .04 16 .10 .01 2.2 .64 .60 .35 .29 .15 .04 16 .02 0 2.0 .60 .64 .35 .29 .15 .04 17 .02 0 1.9 .60 .60 .35 .29 .13 .04 18 .02 0 1.8 .60 .57 .35 .29 .13 ,04 19 .02 0 1.7 .60 .57 .35 .29 .11 .05 20 .02 0 1.6 .64 .53 .35 .29 .09 .04 Si .02 0 1.6 .64 .53 .35 .32 .08 .05 22 .03 0 1.5 .64 .49 .35 .32 .06 .05 23 .03 0 1.4 .64 .49 .35 .32 .08 .05 24 .03 0 1.2 .64 .46 .35 .29 .08 .05 25 .03 0 1.2 .69 .46 .32 .29 .06 .05 26 .03 0 1.1 .69 .42 .32 .26 .06 .05 27 .03 .11 1.0 .69 .42 .35 .29 .06 .05 28 .03 5.5 1.0 .69 .42 .35 .24 .06 .05 29 .03 1.0 .69 .39 .35 .21 .06 .05 30 .03 1.0 .69 .39 .35 .19 .05 .05 31 .03 .9 .39 .17 .04 Seoond- MmHTiniyrt Run-off In Month foot-days Minimum Mean aore-feet Oet 0 0 0 0 0 Hoi 0 0 0 0 0 Dec 0 0 0 0 0 C 44.86 4.64 0 .123 89.1 Jan nary .58 .10 0 .019 1.15 Pet 13.06 5.5 0 .466 25.9 Mar 175.20 70 .9 5.65 348 Apr 22.96 1.0 .60 .765 45.5 £*' 18.12 .8 . 39 .585 35.9 JOB 10.42 .39 .32 .347 20.7 Jill 9.21 .35 .17 .297 18.3 AUJ 3.83 .21 .04 .124 7.60 Sep 1.36 .05 .04 .045 2.70 11 ater year 1937-Z 254.74 70 0 .698 506 LOS ANGELES RIVER BASIN 113 Arroyo Seco near Pasadena, Calif. Location.- Water-stage recorder and control, lat. 34°13'20", long. 118°10'40", near nortirilne of sec. 31, T. 2 N., R. 12 W., li miles upstream from mouth of Millard Canyon and 5i miles northwest of Pasadena. Altitude, about 1,400 feet. Drainage area.- 16.4 square miles. Records available.- December 1910 to September 1938. Average discharge.- 24 years (1913-15, 1916-38); 9.65 second-feet. Extremes.- Maximum discharge during year, 8,620 second-feet Mar. 2, by slope-area method; minimum, 0.6 second-foot Oct. 28-29. 1910-36: Maximum discharge, that of Mar. 2, 1938; practically no flow for several months most years. Remarks.- Records fair. Discharge for period of missing gage heights Dec. 9-19, com- puted on basis of two discharge measurements. Discharge for period when gage was not operating, Mar. 3 to April 28, computed on basis of records of inflow to Devils Gate flood-control reservoir about 2 miles downstream. No diversions above station. Sons measurements furnished by Los Angeles County Flood Control District. Discharge, In second-feet, water year October 1937 to Septeaber 1938 Day oet. HOT. Dee. Jan. Feb. Mar. Apr. ««y June July Aug. Sept. 1 1.1 0.8 1.4 3.4 21 565 50 10 7 3.6 2.1 8 1.1 .8 1.4 3.4 8.5 2,700 46 21 9.5 7 3.6 2.3 3 1.1 .8 1.4 3.1 164 808 42 21 9.5 7.5 3.3 2. 4 1.1 .8 1.4 3.1 118 261 40 21 9.5 7.5 3.3 2. 6 1.1 .9 1.4 2.9 49 208 38 21 9.5 7.5 3.3 2. S 1.0 1.0 1.4 2.9 28 178 36 20 9.5 7.5 3.6 2. 7 .9 1.0 1.4 2 9 19 158 35 21 9.5 6.5 3.9 2. S .9 1.2 1.4 2,1 15 143 32 21 9.5 6.5 3.3 2.5 9 .9 1.4 4.0 2.7 37 125 31 19 9.5 7 3.3 1.9 10 .8 1.4 7 2.7 42 112 30 19 10 6 2.9 2.1 11 .8 1.4 10 2.7 232 108 30 19 10 5.5 2.5 1.8 18 .7 1.4 12 2.7 81 158 29 19 10 5.5 2.3 1.8 13 .7 1.4 9 2.7 50 152 26 19 10 5.5 2.5 1.8 14 .7 1.4 6 2.7 38 147 26 18 9.5 6 2.7 1.8 16 .7 1.5 3 22 34 135 25 18 9 6 2.9 1.8 16 .8 1.5 2.0 10 21 125 25 18 9 5.5 3.1 1.8 17 .8 1.5 1.9 6 17 117 25 17 9 6 3.1 1.9 18 .8 1.5 1.8« 5.5 16 109 25 17 9 5.5 3.3 2.3 19 .8 1.4 1.7 6.5 16 102 25 17 8.5 4.8 3.1 2.1 80 .8 1.4 1.6 6 14 94 24 16 8.5 4.5 2.9 1.9 81 .8 1.2 2.0 4.8 12 87 24 16 8 4.8 2.9 1.6 28 .8 1.2 2.3 4.5 11 80 24 15 8 4.5 2.7 1.5 23 .8 1.3 5. 4.2 10 73 24 14 7.5 3.9 2.7 1.5 84 .8 1.3 3.1 3.9 10 72 24 13 8 4.2 2.7 1.3 85 1.0 1.3 2.7 3.6 9.5 71 24 13 7.5 4.2 2.5 1.3 86 1.1 1.4 6. 3.4 9.5 70 23 12 7.5 4.5 2.5 1.1 87 1.1 1.4 9. 3.1 20 69 23 12 7 4.5 2.3 1.3 88 .6 1.4 5.5 2.9 351 68 23 12 6 4.5 2.3 1.4 89 .6 1.4 4.5 3.9 64 25 12 7 4.8 2.3 1.5 30 .7 1.4 3.6 3.4 58 25 12 7 4.2 2.3 1.6 31 .7 3.4 3.1 54 11 3.6 2.3 Second- Wq*-i]inflB IHiftjtnipi Run-off In Month foot-aaya Mean acre-feet Oct 26.6 1.1 0.6 0.86 53 HOT 37.8 1.5 .8 1.26 75 Dec 118.3 12 1.4 3.82 235 C alendar year 193 7...... 5,642.5 261 .4 15.5 11,200 Jan 137.4 22 2.7 4.43 273 Pet 1,453.6 351 8.5 51.9 2,880 Hu 7,271 2,700 54 235 14,420 Apx 879 50 23 29.3 1,740 Maj 526 22 11 17.0 1,040 Jim 262 10 6 8.73 520 J-Ul 172.5 7.5 3.6 5.56 342 £e 90 3.9 2.3 2.90 179 B«i 57.5 2.7 1.1 1.92 114 1 ater year 1937-3 11,031.6 2,700 .6 30.2 21,870 114 LOS ANGELES RIVER BASIN Santa Anita Creek near Sierra Madre, Calif. Location.- Water-stage recorder, lat. 34°11'30", long. 118°01'00", In'SWiNEi sec. 10, T. 1 N., R. 11 W., at head of Hermits Falls, 4 miles northeast of Sierra Madre. Altitude, about 1,400 feet. Drainage area.- 10.5 square miles. Records available.- July 1916 to September 1938. Average discharge.- £2 years 5.59 second-feet. Extremes.- Maximum discharge during year, about 5,200 second-feet March 2; minimum, 1.3 second-foot Oct. 24 to Nov. 2. 1916-38: Maximum discharge, that of Mar. 2, 1938; practically no flow Aug. 18 to Sept. 14, 1929. Remarks.- Records fair. Discharge for period of no gage-height record, Oct. 1 to Feb. 1, computed on basis of four discharge measurements and records for Arroyo Seco near Pasadena and Little Santa Anita Creek near Sierra Madre; that for Feb. 2 to Mar. 18 computed on basis of records of inflow to Santa Anita flood-control reservoir, about lis miles below station. No diversion above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 2.0 1.3 1.5 2.6 17 433 36 21 9.5 6 2.7 2.5 2 2.0 l.S 1.6 2.6 S 1,680 34 20 9 6 2.7 2.3 3 2.0 1.4 1.6 2.4 43 511 33 19 9 6 2.7 2.6 4 2.0 1.4 1.6 2.3 63 230 33 IS 9 6 2.7 2.6 6 1.9 1.4 1.6 2.2 31 162 33 17 8.5 5.5 2.7 2.3 6 1.9 1.4 1.5 2.0 19 130 30 17 8.5 6 2.7 2.3 7 1.9 1.4 1.5 1.9 14 107 28 16 9 5 2.7 2.3 8 1.8 1.4 1.5 1.8 12 90 26 16 9 5 3.0 2.3 9 1.8 1.4 3.0 l.S 21 79 25 15 9 4.9 2.7 2.3 10 l.S 1.4 6.5 1.8 24 72 25 15 9.5 4.9 2.5 2.3 11 1.7 1.4 9.5 1.8 50 6S 25 16 9.5 4.6 2.5 2.3 12 1.7 1.4 9 l.S 60 138 27 15 9.5 4.6 2.5 2.5 13 1.7 1.5 6.S 1.8 42 122 27 14 9 4.6 2.5 2.1 14 1.6 l.S 4.8 1.8 2S 106 26 14 8.5 4.6 2.3 1.7 16 1.6 1.5 3.6 19 25 94 24 14 8 4.3 1.9 1.7 16 1.6 l.S 2.4 8 19 88 23 15 8 4.0 1.9 1.7 17 l.S 1.5 2.4 5 17 84 22 14 7.B 3.7 2.1 1.9 18 1.5 1.5 2,3 4.6 16 62 21 14 -7.5 4.0 2.1 1.9 19 l.S 1.6 2.3 S 14 79 20 14 7.5 4.0 2.3 1.7 20 1.4 1.6 2.3 4.4 12 73 22 13 7.5 4.0 2.1 1.7 21 1.4 1.6 2.3 3.8 10 67 22 12 7 4.0 2.3 1.7 22 1.4 1.6 2.4 3.7 9 62 21 12 6.5 4.0 2.3 1.7 23 1.4 1.6 4.3 3.7 8.6 67 20 11 6.5 3.7 2.5 1.7 24 l.S 1.6 3.2 3.6 8 64 24 11 6.5 3.5 2.7 1.9 25 1.3 1.6 2.7 3.4 7.S 62 22 11 6.5 3.7 2.7 1.9 26 1.3 1.6 5 3.3 7 48 20 10 6 3.5 2.7 1.9 27 1.3 1.6 6 3.1 17 45 19 10 6 3.2 2.5 1.7 28 1.3 1.6 4.1 3.0 334 44 19 10 6 3.2 2.5 1.7 29 1.3 1.6 3.5 3.1 _ 42 20 10 6.5 3.2 2.5 1.7 30 l.S 1.5 3.0 3.1 « 40 22 10 6.5 3.0 2.5 1.8 31 1.3 - 2.9 3.0 - 37 9.6 3.0 2.5 S«eond- Run-off In Mqylyftflq Mean Month f oo t -days Minimum acre-feet October...... AQVd . O** 2»0 1.3 1.60 98 44.4 1.6 1.3 1.48 88 106.9 9.5 1.5 3.42 210 4,689.0 185 1.2 12.6 9,100 111.4 19 1 *8 3.59 221 936.0 334 7 33»4 1,860 March...... 4,875 1,580 O xrj f 15V 9,670 April...... 748 36 19 24.9 1,480 May...... 433.6 21 9.5 14.0 860 236.5 9 «5 6 M 00 469 July...... 135.7 16 3.0 4ls8 269 77.0 3» 0 1.9 So 48 163 60.3 2.6 1.7 2.01 120 Water year 1937-J>8...... 7,813.2 1,580 1.3 21.4 15,500 LOS ANGELES RIVER BASIN 115 Little Santa Anita Creek near Sierra Madre, Calif. Location.- Water-stage recorder and control, lat. 34°11'15", long. 118°02'35", near center of NWi sec. 9, T. IN., R. 11 W., 2 miles northeast of Sierra Madre. Alti tude, about 2,200 feet. Drainage area.- 1.9 square miles. Records available.- April 1916 to September 1938. Average discharge.- 21 years (1916-25, 1926-38), 0.986 second-foot. Extremes.- Maximum discharge during year, 536 second-feet Mar. 2, computed on basis of inflow to Sierra Madre flood-control-reservoir; minimum discharge, 0.1 second-foot Oct. 9-13 and 22. 1916-38: Maximum discharge that of Mar. 2, 1938; no flow during periods In 1919, 1924 and 1925. Remarks.- Records fair. Discharge for periods of missing gage heights Nov. 25 to Dec. K), toar. 1-18,computed on basis of three discharge measurements and'records of inflow to Sierra Madre flood-control reservoir, about If miles downstream. No diversions above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug . Sept. 1 0.2 0.2 0.2 0.4 1.7 57 10 2.6 2.3 1.6 0.6 0.4 2 .2 .2 .2 .4 1.1 182 10 2.6 2.3 1.6 .6 .4 S .2 .2 .2 .4 5.5 100 10 2.6 2.3 1.5 .7 .4 4 .2 .2 .2 .4 8 41 10 2.6 2.3 1.5 .7 .4 6 .2 .2 .2 .4 3.6 33 10 2.6 2.2 1.3 .7 .4 6 .2 .2 .2 .3 2.6 26 7.5 2.6 2.1 1.3 .8 .4 7 .2 .2 .2 .3 2.0 23 6 2.6 2.2 1.3 .8 .4 8 .2 .2 .2 .3 1.6 14 6 2.6 2.2 1.2 .8 .4 9 .1 .2 .2 .3 2.2 16 6 2.6 2.2 1.1 .8 .3 10 .1 .2 .3 .3 2.6 14 6 2.6 2.2 1.0 .7 .3 11 .1 .2 2.5 .3 5.5 16 6 2.7 2.2 .9 .7 .3 12 .1 .2 .8 .3 6.5 32 6 2.7 2.2 .8 .6 .3 13 .1 .2 .5 .3 7.5 30 6 2.6 2.2 .8 .6 .3 U .2 .2 .4 .3 4.0 16 5.5 2.6 2.1 .8 .6 .3 IS .2 .2 .4 1.4 3.3 25 4.9 2.6 2.1 .7 .6 .3 16 .2 .2 .3 .8 3.1 18 4.7 2.7 2.1 .7 .6 .3 17 .2 .2 .3 .7 2.7 16 4.2 2.7 2.1 .6 .6 .3 18 .2 .2 .3 .7 2.5 14 3.9 2.7 2.1 .6 .6 .3 19 .2 .2 .3 .8 2,4 13 3.6 2.6 2.1 .6 .6 .3 20 .2 .2 .3 .7 2.0 12 3.4 2.6 2.1 .6 .5 .3 21 .2 .2 .3 .6 1.6 12 3.3 2.5 2.0 .6 .5 .3 22 .1 .2 .3 .6 1.5 12 3.3 2.3 2.0 .6 .5 .3 23 .2 .2 .7 .6 1.4 11 3.0 2.3 1.9 ,6 .5 .3 24 .2 .2 .5 .6 1.3 10 3.0 2.3 1.9 .6 .5 .3 26 .2 .2 .4 .5 1.3 10 2.7 2.3 1.8 .6 .5 .3 26 .2 .2 .7 .5 1.2 10 2.7 2.3 1.8 .6 .5 .3 27 .2 .2 .9 .5 2.0 10 2.6 2.2 1.8 .5 .4 .3 20 .2 .2 ,6 .5 42 10 2.6 2.2 1.6 .5 .4 .3 29 .2 .2 .5 .5 w 10 2.6 2.3 1.7 .6 .4 .3 so .2 .2 .5 .5 . 10 2.6 2.5 1.7 .6 .4 .3 31 v2 - .5 .5 - 10 - 2.5 - .6 .4 ~ Second- Run-off In Month foot -d«ya Maximum Minimum Mean acre-feet 6.0 .2 .20 12 D*oeab«r...... 14.1 2.5 .2 .45 28 656.7 26 .1 1.80 1,300 15.7 1.4 .3 .51 31 122.7 42 1.1 4.38 243 813 182 10 26.2 1,610 torll...... 158.1 10 2.6 5.27 314 M«y...... 61.8 1.6 2.06 123 .4 9.8 .4 .3 .33 19 Water year 1937-3 1,330.1 182 .1 3.64 2,640 116 LOS ANGELES RIVER BASIN Eaton Creek near Pasadena, Calif. Location.- Water-stage recorder, lat. 34°11'40", long. 118°06'15", in SEi sec. 2, T. 1 w., R. 12 W., at mouth of canyon, Just upstream from Mount Wilson toll bridge, 4 miles northeast of Pasadena. Altitude, 1,230 feet. Drainage area.- 6.5 square miles. Records available.- March 1918 to September 1938. Average discharge.- 20 years, 2.45 second-feet. Extremes.- Maximum discharge during year, 2,400 second-feet Mar. 2, (gage height, 3.50 feet), from record of inflow to Eaton flood-control reservoir; no flow for several months. 1918-38: Maximum, that of Mar. 2, 1938; no flow for some periods each year. Remarks.- Records good except those for period of missing gage heights, Feb. 16 to Mar. 29, which were computed on basis of records of inflow to Eaton flood-control reservoir and 41 discharge measurements and are poor. Records do not include water diverted above station by city of Pasadena; record of this diversion furnished by city. Re sults of 17 discharge measurements furnished by Los Angeles County Flood Control District and 33 by city of Pasadena. Monthly diversion, In acre-feet, from Eaton Creek by city of Pasaden ater year 1937-38 October.. May...... 176 November. 51 June...... 238 December. 76 July...... 164 January.. 101 August.... 109 February. 154 September. 79 March...... 6 April...... 257 The year.. 1,460 Discharge, In second-feet, water rear October 1937 to September 1938 Day Dot. HOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 0 0.2 9 142 18 5.5 0.4 2 0 .8 1.9 836 13 6 0 S 0 0 36 268 9 3 0 4 0 0 46 111 11 6 0 5 0 0 20 82 12 7 0 6 0 0 4.6 70 11 7.5 0 7 0 0 0 63 11 8 0 8 0 0 0 58 10 8 0 9 .1 0 9 50 8 8 .1 10 1.1 0 6.5 37 8.5 7.5 1.3 11 9 0 45 43 9 7.5 .4 12 2.4 0 40 56 14 7 .3 13 0 0 20 66 12 7 .2 14 0 0 11 60 10 7 .1 15 0 13 7.5 51 8.5 7 0 16 0 1.8 6 45 8 5.5 0 17 0 .9 12 40 7 1.8 0 18 0 .4 5 35 6 1.6 0 19 0 .8 5 39 6 1.9 0 20 0 0 3 35 7.5 2.2 0 21 0 0 2 32 8 2.1 0 22 0 0 2 28 7 1.3 0 23 .4 0 2 26 6 .6 0 24 0 0 2 24. 5.5 .6 0 25 0 0 2 23 5 3.6 0 26 2.4 0 20 24 4.5 0 0 27 .7 0 20 24 4.5 0 0 28 0 0 144 23 4.5 0 0 29 0 0 _ 22 3.5 .8 0 30 .3 0 _ 18 4.5 .7 0 31 .6 0 - 17 - .6 - Second- Run-off In Maximum IHTilTmipil Hean Month foot-days acre-feet 0 0 0 0 0 0 0 0 0 0 17.0 9 0 .55 34 1,675.4 112 0 4.59 3,320 Jar 17.9 13 0 .58 36 Fel 481.5 144 0 17.2 955 Kax 2,448 836 17 79.0 4,860 April ...... 252.5 18 3.5 8.42 501 **T...... 125.3 8 0 4.04 249 2.8 1.3 0 .09 5.6 July...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Water year 1937-; 8...... 3,345.0 836 0 9.16 6,640 LOS ANGELES RIVER BASIN 117 Rio Hondo near Montebello, Calif. Location.- Water-stage recorder, lat. 34°01'55", long. 118004'15", in Potrero Grande grant, at Montebello oil field, about 1,000 feet above Mission bridge, and 2 miles northeast of Montebello, Los Angeles County. Altitude, about 200 feet. Records available.- October 1928 to September 1938. Extremes.- Maximum discharge during water year 1936-37, 4,600 second-feet Mar. 15 (.gage height, 7.77 feet); minimum, 8.5 second-feet Aug. 19. Maximum discharge during water year 1937-38, 33,000 second-feet Mar. 2 (gage height, 12.83 feet); minimum, 11 second-feet Feb. 20. 1928-38: Maximum discharge, that of Mar. 2, 1938; minimum, 0.3 second-foot Dec. 1, 1933. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Discharge, in second-feet, 1936-37 D«y Oct. Hov. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 15 23 16 90 16 62 87 64 22 12 12 13 2 15 23 16 65 19 52 148 41 16 12 12 13 5 14 22 16 60 24 132 153 39 13 13 12 13 4 14 20 17 35 27 104 142 44 15 12 12 13 5 14 18 15 90 40 127 137 47 16 IS 12 13 6 14 17 15 62 984 97 127 55 16 12 12 13 7 14 17 14 100 233 87 142 55 18 12 I13 13 S 14 16 14 80 84 48 US 53 18 12 'l3 13 9 14 17 14 75 90 40 159 47 15 12 13 14 10 14 17 14 80 115 41 113 41 12 12 13 13 11 14 16 14 90 42 80 118 42 12 12 13 13 12 16 15 14 120 42 210 52 40 13 12 13 12 IS 15 16 14 52 425 250 30 34 13 12 13 13 14 16 16 32 97 9S9 249 26 30 14 11 12 13 IS 15 16 322 87 226 788 25 24 13 10 12 12 16 16 14 44 62 273 768 24 20 13 11 12 13 17 35 15 22 26 386 542 109 19 14 11 10 14 18 72 15 22 25 655 376 87 24 13 11 10 14 19 27 14 21 22 842 300 66 34 13 13 9.5 14 20 25 15 21 21 734 100 64 36 12 12 10 14 21 22 14 21 IS 695 97 77 48 12 12 11 14 22 IS 14 20 18 601 352 77 31 12 12 11 15 25 18 15 20 18 84 329 90 26 12 12 10 15 24 17 15 20 18 110 441 45 25 12 13 10 16 25 15 14 58 19 187 419 42 25 12 12 11 15 26 16 14 16 20 70 218 50 26 12 12 11 14 27 14 14 698 20 113 132 39 26 12 12 11 15 28 13 15 234 19 90 118 90 25 12 12 12 16 29 40 16 37 44 - 100 53 25 13 12 12 16 SO 34 16 472 151 - 97 64 26 13 12 12 16 31 57 - 275 12 - 84 - 24 - 12 12 - 118 LOS ANGELES RIVER BASIN Discharge, in seoond-feet, of Rio Hondo near Montebello, Calif., 1936-38 Continued 1937-38 Day Mar. Apr. May July Aug. Sept. 1,290 556 130 19 9,500 1,120 130 18 335 12,600 968 135 18 187 2,960 1,320 135 21 2,600 2,040 118 21 54 2,800 2,240 118 19 62 2,900 1,960 179 20 76 3,490 1,760 144 21 345 3,640 1,720 150 40 65 2,200 2,010 150 241 364 1,400 1,300 144 51 230 1,820 325 126 163 1,850 250 122 29 125 1,770 250 118 216 80 1,790 269 122 63 1,490 259 122 49 915 232 118 46 1,100 177 114 1,080 207 15 103 854 241 17 118 578 332 81 118 255 300 200 114 119 610 280 186 110 18 1,010 249 179 97 18 980 122 179 87 110 1,000 30 200 419 1,000 26 200 1,520 1,000 28 179 1,060 31 166 1,280 34 140 808 144 Second- Month Run-off in foot-days aore-feet October.1936 ...... 657 21.2 1,300 Hovember.... 16.3 970 December...... 2,548 82.2 5,050 Calendar year 1936 ...... 12,258 24,310 January 1937 ...... 1,696 54.7 3,360 February...... 8,196 29.3 16,260 March...... 6,840 788 221 13,570 April...... 2,584 159 86.1 5,130 May...... 1,096 64 35.4 2,170 June...... 413 22 13.8 819 July...... 369 13 11.9 732 August...... 361.5 13 11.7 717 September...... 415 16 13.8 823 Water year 1936-37 ...... 26,664.5 73.1 50,900 October 1937 ...... 498 16.1 November*...... 599 24 20 1,190 December...... 1,260 241 40.6 2,500 Calendar year 1937 ...... __24,327.5 66.7 48,260 January 1938 ...... 1,391 216 29 44.9 2,760 February...... 5,287 1,520 11 189 10,490 March...... 67,630 12,600 255 2,182 134,100 April...... 20,636 2,240 26 688 40,920 May...... 734 31 20 23.7 1,460 June...... 624 23 19 20.0 1,240 July...... 2,359 200 15 76.1 4,680 August...... 3,656 179 84 118 7,250 September...... 935 79 16 31.2 1,850 Water year 1937-38 ...... 105,609 12,600 289 209,428 LOS ANGELES RIVER BASIN 119 Rio Hondo near Downey, Calif. Location.- Water-stage recorder, lat. 33°56'40", long. 118°09'50", in San Antonio grant, on Stewart and Gray road bridge, half a mile upstream from confluence with Los Angeles River, and li miles west of Downey, Los Angeles County. Altitude, about 95 feet. Drainage area.- 374 square miles. Records available.- March 1928 to September 1938. Average discharge.- 10 years (1928-38), 35.5 second-feet. Extremes.- Maximum discharge during water year 1936-37, 4,800 second-feet Feb. 14; no flow during several periods. Maximum discharge during water year 1937-38, 24,400 second-feet Mar. 3 (gage height, 13.5 feet); no flow during several periods. 1928-38: Maximum discharge, that of. Mar. 3, 1938; no flow during part of each year. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Discharge, In second-feet, 1936-37 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0 1.5 9.5 0 0.3 1.9 1.0 0.2 0.2 0.2 0-7 2 0 0 .8 10 0 0 9.5 1.6 .1 .3 1.9 .6 5 0 .8 1.2 2.0 0 1.9 6.5 2.4 .1 .3 1.0 1.0 4 0 .6 1.9 .1 0 13 9.5 2.4 .2 .1 .9 0 5 0 .9 1.8 11 0 9 2.6 4.6 .3 .5 .2 2.3 6 0 .3 1.7 46 871 2.9 4.3 4.9 .3 8 .7 2.5 7 0 .1 1.3 11 149 .5 7 3.5 .3 1.0 .4 0 S 0 1.4 2.2 10 29 0 4.0 3.1 .4 .5 .6 .1 9 0 1.0 3.2 8.5 24 0 4.6 .1 .4 .2 .7 0 10 0 0 4.9 8 62 0 3.4 1.2 .8 .6 .2 0 11 0 0 4.1 8 2.2 0 3.3 1.6 .6 1.6 .2 0 12 0 0 4.9 77 0 17 3.0 1.4 .4 1.1 -1 1.0 15 0 0 3.2 45 301 91 0 .4 .2 .6 .2 .5 14 0 0 4.3 1.7 1,460 94 0 1.2 1.0 .6 .2 0 15 0 0 32 2.4 171 576 0 1.0 1.1 .7 .2 0 16 .1 0 14 .5 230 754 0 1.0 1.1 .2 .3 1.3 17 .1 .4 0 .2 244 735 .2 1.0 1.2 0 .3 .5 18 0 1.3 0 0 660 531 .4 1.2 .4 .3 .3 2.0 19 .3 .4 0 0 798 342 .1 1.5 .5 .1 .4 1.6 20 0 1.4 0 0 705 78 0 2.6 1.4 .2 .4 .1 21 0 1.9 0 0 720 38 .8 1.9 .7 .1 .3 0 22 0 2.4 0 0 616 251 0 .8 .4 0 .3 0 25 .2 2.6 0 0 6 183 .2 .5 .1 0 .2 1.5 24 0 2.4 0 0 .4 375 .2 .4 0 0 .1 1.4 25 0 2.2 0 0 71 288 .2 .8 .3 .1 .1 .3 26 .3- 3.7 0 0 12 60 0 .4 .4 .1 .1 2.2 27 1.8 2.2 331 0 22 17 .4 .2 .2 .1 0 1.0 28 1.0 2.0 188 0 19 8 .2 .3 .4 .1 0 1.6 29 .7 1.6 5.5 0 _ 3.5 0 .3 .4 .2 0 0 50 2.5 1.8 234 52 - .2 1.4 .3 .3 .2 0 .6 51 4.7 - 549 57 - 1.3 - 0 - .8 0 - 120 LOS ANGELES RIVER BASIN Discharge, in second-feet, of Rio Hondo near Dovmey, Calif., 1936-38 Continued 1937-38 Day Oct. Nor. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.9 4.6 2.0 0 415 1,870 444 0.1 3.6 2.0 3.6 6 2 .2 2.3 4.6 0 0 11,100 90B .6 2.4 4.0 4.0 4.8 S .2 .9 3.6 0 205 12,700 800 .4 3.3 5.5 6 0 4 .9 1.0 3.8 0 159 3,690 1,110 .3 3.3 4.3 3.6 4.3 5 .4 3.8 0 0 9 2,690 L.750 4.0 4.0 4.0 0 4.3 6 -5 5 5 0 1.1 2,500 fL,930 4.3 4.0 2.9 0 5.5 7 .3 5 3.0 0 0 2,520 1,700 3.3 2.6 2.6 2.2 4.8 8 0 2.8 4.2 0 0 2,780 1,400 3.3 3.3 4.0 3.6 0 9 0 3.0 5 0 272 3,520 1,340 2.6 2 «9 3.6 4.0 0 10 1.8 2.6 6.5 0 40 2,570 1,220 2.9 4.8 7 2.0 0 11 1.0 2.8 123 0 222 1,210 799 0 6 5.5 4.0 2.0 12 0 3.0 20 0 111 1,630 291 .2 4.3 0 2.4 1.2 IS .5 3.3 0 0 9 1,850 172 1.3 4.0 0 4.0 1.5 14 1.1 0 0 0 0 2,050 128 2.4 ~3.33.6 4.3 5.5 1.8 15 1.0 3.3 0 71 0 1,820 136 2.6 4.8 5.5 9.5 16 2.0 6.5 0 0 0 1,380 141 2.4 2.9 3.6 4.3 12 17 .3 7 0 0 0 788 156 1.1 3.3 0 2.2 14 18 0 .6 0 0 0 997 166 2.2 2.6 3.6 2.2 24 19 .4 2.8 0 0 0 968 161 6 7 4.8 4.8 20 20 0 8.5 0 0 0 707 161 3.6 4.3 2.9 5.5 16 21 .6 9.5 0 0 0 544 172 2.4 2.9 2.2 4.0 11 22 .8 10 0 0 0 158 205 4.3 3.6 2.4 3.6 5.5 23 .3 0 3.3 0 0 456 223 7 4.3 3.3 4.8 11 24 .6 0 0 0 0 824 235 4.0 9 2.6 4.0 9.5 26 0 0 0 0 2.0 800 14 2.6 7 2.0 2.6 9.5 26 1.2 6 30 0 3.3 752 0 3.6 .3 0 6 6 27 1.2 0 11 0 279 728 0 4.0 1.0 2.4 6 8.5 28 1.6 35° .3 0 0 1,360 800 0 4.0 1.8 2.2 5.5 6 29 1.0 0 0 788 0 2.6 2.4 2.2 4.0 7 30 2.6 4.6 0 0 812 .1 4.3 2.6 3.3 4.3 6 31 3.0 0 0 831 2.4 6 4.0 Second- Month Maximum Minimum Mean Run-off In foot-days acre-feet Oct ober 193 11.7 4.7 0 0.38 23 NOT 31.9 3.7 0 1.06 63 Dec 1,390.5 549 0 44.8 2,760 Calendar year 193 6 ...... 3,516.3 549 0 9.63 6,980 January 193ff 299.9 77 0 9.67 696 Feb 7,172.6 1,460 0 256 14,230 Mar 4,470.6 754 0 144 8,870 Apr 63.7 9.5 0 2.12 126 May 43,6 4.9 0 1.41 86 Jim 14.2 1.4 0 .47 28 Jul 11.6 1.6 0 .37 23 Aug 10.5 1.9 0 .34 21 Sep 22.8 2.5 0 .76 45 W 13,543.6 1,460 0 37-1 26,870 Oct ober 1937 24.4 3.0 0 .79 48 HOT 107.2 10 0 3.57 213 Dec 254.7 123 0 8.22 505 C 12,495.8 1,460 0 3.42 24,790 January 193g 71 71 0 2 »29 141 Feb 3,087-4 1,360 0 110 6,120 Mar 66,833 12,7OO 158 2,166 132,600 Apr 15,762.1 1,930 0 525 31,260 May 84.8 7 0 2.74 168 Jun 110.4 9 .5 3.68 219 Jul 98.0 7 0 3.16 194 Aug 118.2 6 0 3.81 234 Sep 211.7 24 0 7.06 420 W 86,762.9 12,700 0 2S8 172,100 LOS ANGELES RIVER BASIN 121 Rio Hondo Slough near Montebello, Calif. Location.- Water-stage recorder, lat. 34°01'45", long. 118°04'07", at San Gabriel Boule- vard bridge, in Paso de Bartolo grant, 2 miles northeast of Montebello, Los Angeles County. Records available.- October 1932 to September 1938. Extremes.- Maximum discharge during year ending Sept. 30, 1937, 84 second-feet Feb. 14; minimum, 10 second-feet Oct. 7-10. Maximum discharge during year ending Sept. 30, 1938 not determined, occurred Mar. 2; minimum, 15 second-feet Oct. 1, 21, and 22. 1932-38: Maximum discharge not determined, occurred Mar. 2, 1938; minimum, 4.8 secondrfeet Oct. 4, 1935. Remarks.- Records furnished by Los Angeles County Flood Control District, through C. H. Howell, chief engineer. Discharge, in second-feet, 1936-37 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 11 13 11 13 15 17 17 16 17 16 15 13 2 11 13 11 12 14 17 17 16 18 15 15 13 3 11 12 11 12 14 17 17 16 18 16 15 14 4 11 13 11 11 14 16 17 16 17 16 15 14 5 11 12 11 12 14 16 17 16 17 16 15 14 6 11 12 11 14 38 16 17 16 17 16 15 14 7 10 12 12 13 25 16 17 16 17 16 14 14 8 10 12 12 12'12 19 16 17 17 17 16 14 14 9 10 12 11 18 16 17 17 17 16 14 14 10 10 12 11 12 17 16 17 17 17 15 14 14 11 11 11 11 12 17 16 18 17 17 16 14 14 12 11 12 11 13 16 17 17 17 17 16 14 15 15 11 11 11 14 21 21 17 17 17 15 14 15 14 11 12 11 13 51 18 17 17 16 15 14 15 15 11 12 17 13 23 23 18 17 16 14 15 15 16 11 12 15 13 21 23 18 18 16 14 15 14 17 12 12 12 13 20 20 18 17 16 13 14 13 18 13 12 12 13 18 19 18 17 16 14 14 14 19 12 12 12 13 17 18 18 17 16 14 14 15 20 12 12 12 13 17 17 17 17 16 13 15 14 21 11 12 12 13 17 17 17 17 17 14 15 15 22 11 12 12 13 16 20 17 17 17 15 15 15 23 11 12 12 13 16 20 17 15 17 14 15 14 24 12 12 13 16 19 17 16 16 15 15 15 25 12 11 13 13 18 18 17 16 16 15 14 15 26 12 11 12 13 17 18 17 16 16 15 15 15 27 13 11 15 14 17 17 17 16 16 14 15 16 28 13 11 16 14 17 17 17 16 16 14 14 15 29 12 11 13 14 - 17 17 17 16 14 14 16 30 13 11 14 16 _ 17 16 17 15 14 14 16 31 14 21 16 - 17 18 14 14 - 122 LOS ANGELES RIVER BASIN Discharge, in second-feet, of Rio Hondo Slough near Montebello, Calif., 1936-38 Continued 1937-38 Day Apr. May July Aug. Sept. 20 20 20 20 21 21 21 21 21 20 Second- Run-off in foot-daya acre-feet October 1936 ...... 355 11.5 704 November...... 355 11.8 704 December...... 388 12.5 770 Calendar year 1936 4,824 13.2 January 1937 ...... 405 11 13.1 February...... 543 14 19.4 1,080 March...... 552 16 17.8 1,090 April...... 515 16 17.2 1,020 May...... 515 15 16.6 1,020 June...... 497 15 16.6 986 July...... 460 13 14.8 912 August...... 449 14 14.5 891 September...... 464 13 14.0 861 Water year 1936-37 15.0 10,840 October 1937 ...... 491 15.8 974 November...... 496 16.5 984 December...... 593 19.1 1,180 Calendar year 1937 5,950 January 1938 ...... 567 18.3 1,120 February...... 650 23.2 1,290 Marqtu...... April...... 740 24.7 1,470 May...... 705 22.7 1,400 June...... 634 21.1 1,260 July...... 621 20.0 1,230 August...... 631 20.4 1,250 September...... 607 20.2 1,200 Water year 1937-38 BALLONA CREEK BASIN 123 Ballona Creek near Culver City, Calif. Location.- Water-stage recorder, lat. 33°59'50", long. 118°24'10", in La Ballona grant, on Sawtelle Boulevard bridge, about li miles south, of Culver City, Los Angeles county. Altitude, about 40 feet. Drainage area.- 112 square miles. Records available.- February 1928 to September 1938. Extremes.- Maximum discharge during water year 1936-37, 8,940 second-feet Dec. 30; no flow Oct. 9 and Dec. 26. Maximum discharge during water year 1937-38, 19,200 second-feet Mar. 2 (gage height, 15.2 feet); minimum, 3.2 second-feet Sept. 8. 1928-38: Maximum discharge, that of Mar. 2, 1938; no flow during parts of most years. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Dlecharge, In second-feet, 1936-37 D«y Oct. Nov. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.6 3.0 2.4 1.5 3.0 12 11 s 7 7.5 11 10 2 2.4 3.0 2.4 1.5 3.0 12 73 5 7 8 10 10 S 4.? 3.2 2.4 1.5 3.0 12 18 5 7.5 11 12 10 4 i.e 6.5 18 1.5 5 12 18 5.5 7.5 8 11 9 B 1.2 6.5 6 325 167 11 21 6 7.5 7 11 9 6 1.5 6.5 5 249 2,040 10 30 6.5 7.5 9.5 11 8 7 1.5 7 4.1 2.1 15 9.5 27 7 7.5 11 12 11 8 1.4 8 12 1.8 5.5 9 26 6 7.5 12 9.5 9.5 9 0 8 18 1.8 5 8.5 17 8 7.5 10 10 9 10 .9 10 29 1.8 5 8 13 6 7.5 10 11 9.5 11 1.2 11 22 1.8 5 7.5 9.5 5.5 6.5 12 12 9.5 12 1.2 11 53 335 6 371 7.5 5.5 7 10 12 9.5 13 1.5 7.5 54 88 1,560 291 5.5 5.5 6.5 10 11 9 14 17 7 497 10 2,160 6.5 4.6 6 6.5 11 11 9 15 5 6.5 851 9 129 1,200 3.7 6 7.5 12 13 8 16 5 7.5 82 7.5 16 55 9.5 6 8 12'9.5 12 9 17 243 7 33 7 16 23 12 6 8 12 9 18 221 9 45 7 16 21 7 6 8 8 12 9 19 12 5.5 48 5.5 16 17 8 5.5 9 9 10 7.5 20 6.5 4.6 47 4.6 16 16 9 6.5 8 10 10 7.5 21 5 4.6 17 4.1 15 14 8 6.5 8 10 10 7 22 5 31 12 4.1 13 530 8.5 5.5 8 11 10 7.5 25 4.1 15 7.5 3.7 14 21 7.5 6 7.5 11 10 6.5 24 4.6 9 2.7 2.7 182 334 9 6.5 8 11 10 7 25 6 6 307 2.4 496 34 7 7 7.5 9.5 10 7 26 3.2 4.1 0 1.8 20 19 23 66 7 9 10 7 27 4.6 2.1 1,070 2.4 12 16 32 7.5 6 12 10 11 28 16 1.8 547 50 12 13 6 7 6.5 12 10 7 29 47 2.1 4.6 349 _ 12 5 7 7 13 10 6 SO 35 2.1 1,413 380 - 12 5.5 7 6.5 12 10 6 SI 279 - 370 5 - 11 - 7 - 12 10 " BALLONA CREEK BASIN Discharge, in second-feet, of Ballona Creek near Culver City, Calif., 1936-38 Continued 1937-38 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 4.6 6.5 15 11 2,050 1,100 9.5 22 15 12 4.6 4.6 2 4.6 8.5 20 11 134 7,330 10 IS 15 9 4.3 5 3 6 8.5 17 10 375 280 12 16 15 7 4.6 4.3 4 5 8 17 10 264 100 12 16 15 4.6 4.3 4.3 5 5 9.5 16 10 17 69 12 16 13 5 4.6 4.3 6 3.9 8.5 16 9.5 17 59 11 16 13 4.3 4.6 4.5 7 4.3 6 17 9.5 17 55 12 16 14 8 4.3 3.9 8 4.3 7 15 10 92 84 12 17 13 3.9 6 3.2 9 4.6 8.5 147 10 698 59 12 18 15 4.3 4.6 4.3 10 5 8 233 11 88 59 13 16 14 4.6 4.6 3.9 11 5 8.5 1,170 11 991 362 14 16 14 5 4.3 3.6 12 5 8.5 28 12 119 605 13 16 12 4.3 5.5 4.3 13 5 9 19 12 18 251 14 16 13 3.6 3.9 4.3 14 6 11 14 12 65 108 15 IE 14 6 3.9 4.3 15 6.5 11 14 487 17 103 15 13 14 6.5 4.6 3.9 16 8 12 13 15 17 89 15 14 12 6.5 4.6 4.3 17 8.5 10 12 15 17 86 16 14 13 5 4.3 4.3 18 9 9 11 57 85 72 16 1£ 13 5 4.3 19 10 9 11 82 114 68 17 1] 12 4.6 5 3.9 20 8.5 9 11 12 17 56 17 14 12 5 4.6 3.9 21 8 8.5 11 7 17 46 18 12 12 5.5 4.6 3.6 22 9 9.5 11 5 17 36 18 1£ 14 5 5 3.6 23 9 9.5 233 7 17 27 17 1£ 14 5 6.5 3.6 24 8 15 16 5 17 22 30 12 14 4.3 6 3.5 25 8.5 12 16 5 17 20 180 16 14 5 6 3.6 26 9 14 378 5.5 17 19 18 lr 13 4.3 5.5 3.9 27 8.5 18 14 5.5 946 18 16 lr 11 3.9 4.6 4.3 28 8 17 13 16 2,840 16 16 IE 13 3.9 5.5 3.9 29 9 15 12 120 12 16 12 10 4.6 5.5 3.5 30 8.5 16 12 8.5 9 83 12 9.5 4.3 5.5 4.3 31 8.5 12 22 9 lr 3.9 4.5 Second- Month Maximum Minimum Mean Run-off in foot-days acre-feet Oct ober 1936 ...... 938.3 279 0 30.3 1,860 flov 216.1 31 l.E 7.20 429 Dec 5,582.1 1,413 0 180 11,070 C 12,547.5 1,413 0 34.4 24 , 880 January 1937 1,868.1 380 l.E 50.3 3,710 Fob 6,955.5 2,160 3.C 248 13,800 Mar 3,128.0 1,200 6.E 101 6,200 Apr 441.8 73 3. r 14.7 876 May 252.5 65 5 8.15 501 Jun 221.0 9 6 7.37 438 Jul 320.0 13 7 10.3 635 Aug 333.5 13 10.8 661 Sep 254.0 11 6 8.47 504 Water yea r 1936-3 20,510.9 2,150 0 56.2 40,684 Oct ober 193 rj 212.8 10 3.£ 5.86 422 Hov 310.5 18 6 10.4 516 Dec ember...... 2,544 1,170 11 82.1 5,050 C alendar year 1937 ...... 16,841.7 2,160 l.J 45.1 33,400 Jan uary 193 Q 1,268.5 487 5 40.9 2,520 Feb 9,100 2,840 17 325 18,050 Mar 11,229 7,330 9 362 22,270 Apr 679.5 180 ll" 22.6 1,350 May 481 22 15.5 954 Jun 395.5 15 13.2 784 Jul 163.9 12 3.e 5.29 325 Aug 150.4 5.5 3.£ 4.85 298 Sep 121.5 5 3.£ 4.05 241 Water year 1937-38 ...... 25,556.6 7,330 3.£ 73.0 52,880 TOPANGA CREEK BASIN 125 Topanga Creek near Topanga Beach, Calif. Location.- Water-stage recorder, lat. 34°03'50", long. 118°35'10", In Boca de Santa Monica grant, at highway bridge, 2 miles north of Topanga Beach, Los Angeles County. Drainage area.- 17.9 square miles. Records available.- January 1930 to September 1938. Extremes.- Maximum discharge during year ending September 30, 1937, 1,130 second-feet Mar. 15; no flow at times. Maximum discharge during year ending September 30, 1938, 7,960 second-feet Mar. 2; no flow at times. 1930-38: Maximum discharge, that of Mar. 2, 1938; no flow at times. Remarks.- Records furnished by Los Angeles County Flood Control District, through C. H. Howell, chief engineer, except those for Feb. 28 to Mar. 4, 1938, which were com puted by the Geological Survey. Discharge, in second-feet, 1936-37 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0.4 0 16 10 9.5 10 2.2 1.6 0.1 0 0.1 2 0 .1 0 9 4.e 6.5 12 2.0 1.4 .1 0 .1 3 0 0 .2 4.2 2.4 6.5 12 2.4 1.4 .1 0 .1 4 0 0 .3 1.4 1.0 6.5 10 2.4 1.4 .1 0 .1 5 0 0 .2 3.9 1.0 7 9.5 2.4 1.2 .2 0 .1 6 0 0 .2 14 195 6 9 3.2 1.2 .2 0 .1 7 0 0 .2 2.0 62 8 8 3.4 1.0 .1 0 .1 8 0 0 .2 1.0 26 8.5 7 3.2 1.0 0 0 .1 9 0 .1 .2 1.0 14 9 5.5 3.4 1.1 0 .1 .1 10 0 .1 0 1.1 11 9.5 5 3.4 .9 0 .1 .1 11 0 .1 0 1.1 9.5 12 5 2.8 0 .1 .1 12 0 .2 .1 11 9 17 5 2.8 0 .1 .1 13 0 .1 0 7 106 66 5 2.6 . 0 .1 .1 14 0 .1 .5 3.4 413 14 4.7 3.0 . 0 .1 .1 15 0 .1 10 2.2 113 196 4.4 3.4 0 .1 .1 16 .1 .2 4.2 1.4 56 84 3.2 3.4 .7 0 .1 .1 17 .2 .2 .5 .9 27 41 2.6 3.2 .6 0 .1 .1 18 24 0 .3 .4 13 26 2.4 3-0 .6 0 .1 .1 19 9.5 .1 .2 .4 8 19 2.2 3.0 .6 0 .1 .1 20 3.6 .1 .1 1.3 6 16 1.6 2.6 .6 0 .1 .1 21 2.0 .1 .2 2.8 3.9 13 1.6 3.2 .5 0 .1 0 22 .9 .1 .1 3.2 4.4 33 1.6 3.4 .5 0 .1 0 25 .5 .2 .2 3.0 10 9 1.3 2.8 .4 0 .1 0 24 .6 .2 .2 3.6 16 27 1.2 2.8 .3 0 .1 0 25 .7 .1 3.6 3.9 17 22 1.4 2.8 .3 0 .1 0 26 .9 0 3.4 3.9 9 16 1.8 2.8 .S 0 .1 0 27 .9 0 107 4.2 9 15 2.4 2.8 .3 0 .1 0 28 .6 .2 35 g 9.5 IS 2.2 2.8 .S 0 .1 0 29 .6 .2 7.5 ^ 12 2.4 2.8 .2 0 .1 0 SO 1.0 .2 85 ?220 - 11 2.2 2.8 .2 0 .1 0 SI 1.4 - 79 ' - 10 - 2.2 - 0 .1 - 126 TOPANGA CREEK BASIN Discharge, In second-feet, of Topanga Creek near Topangs Beach, Calif., 1936-38 Continued 1937-38 Day Apr. May July Aug Sept. 2.0 4.6 2.0 269 5.5 3.4 2.0 101 5.5 3.4 1.8 5.5 3.2 2.2 2.0 1.5 2.2 1.5 2.2 1.5 239 2.4 1.3 147 2.6 1.3 63 2.4 1.3 1.1 28 2.2 1.3 1.3 2.4 1.3 1.3 4.3 1.3 1.1 3.4 1.3 1.3 3.4 1.3 1.1 3.4 1.3 1.1 3.4 1.1 4.1 2.9 .3 3.9 2.4 1.5 3.6 2.2 3.3 2.0 2.2 1.9 643 4.3 4.6 7.5 5.5 5.5 Secor.d- Run-off In foot-days aore-feet October 1936 ...... 47.5 1.53 November...... 3.2 .11 6.3 December...... 338.6 10.9 672 Calendar year 1936 1,130.2 2,240 January 1937 ...... 772.3 24.9 1,530 February...... 1,165.7 413 41.6 2,310 March...... 749 196 1,490 April...... 142.2 282 May...... 89.0 3.4 177 June...... 22.1 1.6 44 July...... 9 August...... 2.3 4.6 September...... 2.0 4.0 Water year 1936-37 6,620 October 1937 ...... 03 November...... 02 December...... 53 Calendar year 1937 2,963.3 January 1938 ...... 12.0 2.6 .1 .39 24 February...... 1,800.7 643 1.9 64.3 3,570 March...... 4,675 2,670 151 9,270 April...... 135.8 6 4.53 270 May...... 80.2 5 2.59 159 June...... 39.1 2.0 1.30 78 July...... 26.7 1.3 .86 53 August...... 16.7 .54 33 September...... 4.1 .14 8.1 Water year 1937-38 6,808.1 18.7 13,500 MALIBU CREEK BASIN 127 Malibu Creek at Crater Camp, near Calabasas, Calif. Location.- Water-stage recorder, lat. 34°04'30", long. 118°42'10", in SWi sec. 18, T. 1 a., R. 17 W., a quarter of a mile below Crater Camp and 6 miles southwest of Calabasas. Drainage area.- 103 square miles. Records available.- January 1931 to September 1938. Extremes.- Maximum discharge during water year 1936-37, 2,760 second-feet Feb. 14 (gage height, 10.98 feet); no flow at times. Maximum discharge during water year 1937-38, 10,000 second-feet Mar. 2 (gage height, 15.90 feet); minimum, 0.2 second-foot at times. 1931-38: Maximum discharge, that of Mar. 2, 1938; no flow during several periods in 1932 and 1936. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Discharge, in second-feet, 1936-38 1936-37 Day Oct. HOT. Dee. Jan. Feb. Mar. Apl>. May June July Aug. Sept. 1 0.1 0.1 0.1 76 148 32 62 9 5 2 .1 .1 .1 39 103 43 48 7 4.5 3 .1 .1 .1 26 65 31 35 6.5 4.5 4 .1 .1 .1 22 34 13 40 9.5 4.1 5 .1 .1 .1 17 28 11 38 10 4.1 6 0 .1 .1 14 1,280 13 38 8.5 3.8 7 0 .1 .1 11 686 14 36 8.5 3.4 6 0 .1 .1 8.5 196 16 34 8 3.0 9 0 .1 .1 7.5 118 18 31 8 3.0 10 0 .1 .1 7 92 18 30 7.5 3.4 11 0 .1 .1 7 74 20 28 7.5 2.6 12 0 .2 .1 12 68 20 26 7 2.6 IS 0 .2 .2 18 152 131 26 7 2.2 14 0 .2 .3 14 1,680 60 23 6.5 2.2 15 .1 .2 1.6 10 568 173 21 6.5 1.9 16 .1 .1 .8 11 354 416 20 6 1.9 17 .2 .1 .1 8.5 244 244 18 6 3.0 IB 7.5 .1 .1 8.5 151 159 18 5.5 2.6 19 .8 .1 .1 8 114 90 16 5.5 2.6 20 .6 .1 .1 8 104 74 15 5 2.6 21 .3 .1 0 7 105 70 14 5.5 2.6 22 .3 .1 .1 7 94 259 14 5.5 2.6 23 .3 .1 .1 6.5 83 209 14 5.5 2.6 24 .2 .1 .1 6 72 167 12 S.5 2.2 25 .S .1 .1 6 60 173 12 5.5 2.2 26 .Z .2 .1 6 53 108 12 5.5 1.9 27 .2 .2 30 6 44 93 12 5.5 1.9 28 .1 .2 27 6.5 29 71 11 5.5 1.5 29 .2 .1 19 16 _ 68 11 5.5 1.5 SO .2 .1 59 97 - 72 10 5 1.2 SI .2 - 347 262 - 64 - 5 - 128 MALIBU CREEK BASIN Discharge, in second-feet, of Malibu Creek at Crater Camp, near Calibasas, Calif., 1936-38 Continued 1957-38 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 0.2 0.2 0.2 0.5 146 1,960 27 11 5 2.6 0.8 0.5 2 .2 .2 .2 .5 38 5,090 25 11 5 2.5 .8 .5 3 .2 .2 .2 .5 100 1,600 26 10 5 2.5 .8 .5 4 .2 .2 .3 .5 86 609 24 10 4.7 2.4 .8 .5 5 .2 .2 .3 .4 32 330 24 9 4.6 2.4 .8 .5 6 .2 .3 .4 26 250 22 9 4.5 2.3 .8 .5 7 .2 .2 .3 .4 25 190 21 9 4.4 2.3 .8 .5 8 .2 .2 .3 .4 25 150 19 9 4.3 2.2 .7 .5 9 .2 .2 .3 .4 37 123 18 8.5 4.1 2.1 .7 .5 10 .2 .3 .4 28 98 20 8 4.0 2.0 .7 .5 11 .2 .2 .7 .4 300 103 19 8 3.9 1.9 .7 .5 12 .2 .2 .6 .4 185 835 19 8 3.8 1.8 .7 .5 13 .2 .2 .6 .4 61 809 19 8 3.7 1.8 .7 .5 14 .2 .6 .4 42 509 18 8 3.7 1.7 .7 .5 15 .2 .2 .6 .4 39 299 18 7.5 3.6 1.6 .7 .5 16 .2 .2 .5 .4 29 190 18 7.5 3.5 1.5 .7 .5 17 .2 .2 .5 .4 23 135 16 7.5 3.5 1.5 .6 .4 18 .2 .2 .5 .4 109 15 7.5 3.4 1.4 .6 .4 19 .2 .2 .5 .4 30 96 13 7.5 3.3 1.4 .6 .4 20 .2 .2 .5 .4 13 87 13 7.5 3.3 1.3 .6 .4 21 .2 .5 .3 11 77 14 7 3.2 1.2 .6 .4 22 .2 .2 .4 .3 12 66 14 7 3.1 1.2 .6 .4 23 .2 .2 .6 .3 12 60 14 7 3.1 1.1 .6 .4 24 .2 .2 .6 .2 12 56 13 6.5 3.0 1.1 .6 .4 25 .2 .2 .6 .2 12 56 13 6.5 2.9 1.0 .6 .4 26 .2 .2 .7 .2 12 55 13 6 2.9 1.0 .5 .4 27 .2 .2 .7 .2 19 53 12 6 .9 .5 .4 28 .2 .2 .7 .3 612 55 12 6 2.8 .9 .5 .4 29 .2 .2 .6 .3 57 12 5.5 2.7 .9 .5 .4 30 .2 .2 .6 .2 56 11 5.5 2.7 .9 .5 .4 31 .2 .6 .3 41 5 .9 .5 Second- Month Maximum Minimum Mean Run-off in foot-days acre-feet Oct ober 193 12.2 7.5 0 0.39 24 HOD 3.7 .2 .1 .12 7.3 Dec 487 347 0 15.7 966 C alendar year 1936 ...... 1,649.1 347 0 4.5 3,270 Jan (uary 1937 759 262 6 24.5 1,510 Feb 6,799 1,680 28 243 13,490 Mar 2,950 416 11 95.2 5,850 Apr 725 62 10 24.2 1,440 May 204.5 10 5 6.60 406 Jun 83.2 5 1.2 2.77 165 Jul 26.6 *.90 53 Aug 8.7 *.30 17 Sep 6.0 *.20 12 W ater year 1936-37 ...... 12,064.9 1,680 0 33,1 23,940 Oct ober 193 7 6.2 .2 .2 .20 12 HOD 6.0 .2 .20 12 Dec 14.9 .7 .£ .48 30 C alendar year 1937 ...... 11,589.1 1,680 .2 31.8 23,000 January 1933 11.2 .5 .2 .36 22 Feb 1,989 612 11 71.0 3,950 Mar ch 14,204 5,090 41 458 28,170 Apr 522 27 11 17.4 1,040 May 239.5 11 5 7.73 475 Jun 110.5 5 Z.I 3.68 219 Jul 50.3 2.6 .£ 1.62 100 Aug 20.3 .8 .65 40 Sep 13.6 .5 .4 .45 27 W 17,187.5 5,090 .2 47.1 34,100 Computed fron figures of dally discharge determined by interpolation between discharge measurements. SANTA CLARA RIVER BASIN 139 Santa Clara River near Saugus, Calif. Location.- Water-stage recorder, la,t. 34°S5'42", long. 118035'23", In San Francisco grant, on pier of old highway bridge, Z miles west of Saugus, Los Angeles County. Drainage area.- 355 square miles. Records available.- October 1939 to September 1938. Extremes.- Maximum discharge during water year 1936-37, 3,410 second-feet Dec. 27; no flow at times. Maximum discharge during water year 1937-38, 24,000 second-feet Mar. 2; no flow at times. 1929-38: Maximum discharge, that of Mar. 2, 1938; no flow at times during 1935-38. Remarks.- Records furnished by Los Angeles County Flood Control District, through H. E. Hedger, chief engineer. Discharge, in second-feet, 1936-37 D«y Oct. HOT. Dee. Jan. Feb. Mar. Apr. »«T June July Aug. Sept. i 0 18 1.9 1.0 7.5 0.8 0.6 0 0.2 0.2 2 .1 11 .3 1.0 6.5 .6 .8 0 .2 .2 5 .1 6 .1 .9 6 .6 1.0 0 .1 .2 4 .2 1.7 .2 .9 5.5 .6 1.0 .1 .1 .2 E .2 .2 .6 .9 4.5 .4 1.0 .1 .1 .2 6 .2 .2 131 .9 4.1 .4 1.2 .1 .1 .2 7 .2 .2 76 .8 3.3 .4 1.4 .1 .1 .2 8 .2 .3 .4 .8 2.9 .4 1.7 .1 .1 .2 9 .2 .2 .3 .8 2.5 .4 2.3 .1 .1 .2 10 .2 .2 .2 .8 2.3 .4 2.5 0 .1 .2 11 .2 .2 .2 .8 2.1 .4 2.1 0 ,1 .1 12 .2 .4 .2 5 2.1 .3 1.7 .1 .1 0 13 .2 .1 1.9 144 1.9 .3 1.4 0 .1 0 14 .4 .2 471 2.1 1.9 .3 1.2 0 .1 0 15 1.7 .2 98 22 1.7 .4 1.0 .1 .1 0 16 0 .1 15 40 1.7 .3 1.0 .1 .1 0 17 0 .1 7 15 1.7 .3 .6 .1 .1 0 18 0 .1 4.0 9 1.4 .3 .6 .1 .1 0 19 0 .2 3.0 6 1.4 .3 .4 .1 .1 0 20 0 .2 2.0 4.1 1.4 .3 .4 .1 .1 0 21 0 .3 1.2 3.7 1.4 .3 .3 .1 .1 .2 22 0 .4 1.2 448 1.4 .4 .3 .1 .1 .1 25 0 .3 1.2 24 1.2 .3 .3 .1 .2 .1 24 0 .2 1.2 46 1.2 .3 .2 ,1 .2 .1 26 15 .2 1.1 32 1.2 .4 .2 .1 .2 .1 26 1.9 .2 1.1 21 1.0 .3 .2 .1 .2 .1 27 309 .3 1.0 16 1.0 .3 .2 0 .1 0 28 12 .3 1.0 15 .8 .3 .2 0 .2 .1 29 1.2 1.2 14 .8 .4 .1 .1 .2 .2 SO 51 37 - 10 .8 .4 0 .2 .2 0 31 125 5.5 - 8.6 - .4 - .2 .2 ~ 130 SANTA CLARA RIVER BASIN Discharge, in second-feet, of Santa Clara River near Saugus, Calif., 1936-38--Continued 1937-38 Day Oct. Hov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.1 0.1 38 349 51 8.E 5.5 2.2 0.4 0.2 2 .1 .1 .^ 6,370 44 8.E 5 2.0 .4 .2 S .1 .1 58 2,310 37 8 5 1.9 .4 .2 4 .1 .1 11 394 30 8 5 1.8 .4 .2 5 .1 .1 5 102 24 8 4.9 1.7 .3 .2 6 .1 .1 4.4 65 18 8 4.8 1.6 .3 .1 7 .1 .1 4.4 84 11 8 4.6 1.5 .3 .1 8 .1 .1 4.4 46 11 7.E 4.5 1.4 .3 .1 9 .1 .1 4.4 46 11 7.E 4.4 1.3 .2 .1 10 .1 .1 4.4 67 11 7.E 4.3 1.2 .2 .1 11 .2 .3 175 80 11 7.f 4.2 1.1 .2 .1 12 .1 .1 20 275 10 7.E 4.1 1.0 .2 .1 13 .1 .1 1.5 513 10 7 4.0 .9 .2 .1 14 .1 .1 1.4 306 10 7 3.9 .8 .2 .1 IS .1 .1 1.3 99 10 7 3.8 .8 .2 .1 16 .1 .1 1.2 67 10 7 3.7 .8 .2 .1 17 .1 .1 1.1 43 10 7 3.6 .7 .2 .1 18 .1 .1 1.0 49 10 6... 3.5 .7 .2 .1 19 .1 .1 1.1 68 10 6.E 3.4 .7 .2 .1 20 .1 .1 1.0 84 9.5 6.E 3.3 .7 .2 .1 21 .1 .1 .9 89 9.5 6.. 3.2 .6 .2 .1 22 .1 .1 .8 88 9.5 6.J 3.1 .6 .2 .1 23 .1 .1 87 9 6 3.0 .6 .2 .1 24 .1 .1 .6 86 9 6 2.9 .6 .2 .1 25 .1 .1 85 9 6 2.8 .6 .2 .1 26 .2 .1 .5 84 9 6 2.7 .5 .1 27 .1 .1 2.0 84 9 6 2.6 .5 .2 .1 28 .1 .1 113 78 8.5 5. 5 2.5 .5 .2 .1 29 .1 .1 71 8.5 5., > 2.4 .5 .2 .1 30 .1 .1 64 8.5 5., 2.3 .5 .2 .1 31 .1 .1 58 5. .4 .2 Second- Month Maximum Minimum Mean Run-off in foot-days acre-feet Oct ober 1936 ...... 0 0 0 0 0 Hot 0 0 0 0 0 Dec ember...... 519.4 309 0 16.8 1,030 C 1,296.4 309 0 3.55 2,570 Jan uary 1937 85.7 37 .1 .28 170 Feb 822.3 471 .3 29.4 1,630 Mar 895.0 448 .£ 28.9 1,780 Apr 11...... 73.2 7.5 .£ 2.44 145 Ma; 12.0 .8 .39 24 Jun 25.9 2.5 0 .86 51 Jul 2.4 .2 0 .08 4.8 August...... 4.1 .2 .1 .13 8.1 Sep 3.1 .2 0 .10 6.1 V,ater year 1936-37 ...... 2,443.1 471 0 6.69 4,850 Oct ober 1937 0 0 0 0 0 Not 0 0 0 0 0 Dec 3.3 .2 .3 .11 6.5 C 1,927.0 471 0 5.28 3,830 Jan(uary 193 Q 3.1 .1 .3 .10 6.1 Peb 458.0 175 .4 16.4 908 Mar 12,291 6,370 43 396 24,380 Apr 438.0 51 8.E 14.6 869 May 214.0 8.5 5.E 6.90 424 Jun 113.0 5.5 2.3 3.77 224 Jul 30.7 2.2 .4 .99 61 Aug 7.4 .4 .£ .24 15 Sep 3.5 .2 .] .12 6.9 Water year 1937-38 ...... 13,562.0 6,370 0 37.2 26,900 SANTA CLARA RIVER BASIN 131 Plru Creek near PIru, Calif. Location.- Water-stage recorder, lat. 34°25'30", long. 118°45'45", in southern part of Temescal grant, about If miles northeast of Plru, and 2 miles upstream from junction with Santa Clara River, Ventura County. Altitude, about 780 feet. Drainage area.- 432 square miles. Records available.- October 1911 to September 1913 and October 1934 to September 1938. October 1927 to September 1934, at site at Plru, li miles downstream. Average discharge.- 11 years (1927-38), 45.5 second-feet. Extremes.- Maximum discharge during year, 35,600 second-feet Mar. 2, by slope-area method; minimum 2.4 second-feet Oct. 11. 1911-13, 1927-38: Maximum discharge, that of Mar. 2, 1938; no flow during parts of some years. Remarks.- Records fair. Discharge for period of missing gage heights, Mar. 3 and 4, computed on basis of records for Santa Paula Creek near Santa Paula and Coyote Creek near Ventura, that for periods when water was below intake, July 6-25, July 30 to Aug. 29, Sept. 1-6, 15-30, computed on basis of 19 discharge measurements. Doheny ditch diverts above station and Piru Water Co. diverts below station. Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 2.7 2.8 5.6 13 657 5,510 232 115 54 27 19 40 2 2.8 2.8 6 13 159 13,140 221 118 51 29 19 26 3 2.8 2.8 6 12 655 4,960 221 113 48 27 20 24 4 2.8 2.8 6 12 440 2,110 221 105 45 26 20 23 6 2.8 2.8 6 12 192 1,560 224 99 43 24 19 22 6 2.8 2.9 6 12 95 1,150 224 96 45 23 19 21 7 2.8 3.0 6 12 45 774 217 93 45 22 18 20 8 2.8 3.4 6 12 37 742 215 S9 45 20 18 20 9 2.8 3.6 7 12 199 678 210 86 48 18 18 19 10 2.8 3.7 10 12 294 618 202 80 57 17 17 17 11 2.7 3.9 129 13 2,610 655 192 S2 60 16 17 16 12 2.7 3.9 134 13 681 1,530 195 78 60 17 16 15 13 2.7 3.9 85 13 418 S19 198 79 57 18 16 14 14 2.8 4.2 70 13 300 750 201 80 48 19 15 14 16 2.8 4.5 62 115 245 700 194 81 43 18 14 15 16 2 *3 4.5 29 33 202 620 165 81 37 17 14 16 17 2.8 4.8 26 2S 188 550 150 78 37 16 15 17 18 2.8 4.8 21 23 188 520 138 76 37 15 15 18 19 2.8 4.8 18 21 233 490 133 76 40 16 15 16 20 2.8 5 13 19 181 450 186 76 45 16 14 14 21 2.8 5 13 18 160 400 125 76 45 17 13 13 22 2.8 5 14 17 150 395 124 70 37 17 12 13 23 2.8 5 49 16 130 406 124 66 35 16 12 13 24 2.8 5 16 16 127 400 118 66 35 15 12 13 25 2.8 5 14 15 120 375 127 66 30 15 12 13 26 2.8 5 15 15 111 347 126 60 28 65 12 13 27 2.8 5 16 15 114 317 118 63 28 40 12 13 28 2.8 5 14 15 1,610 288 120 63 26 33 12 14 29 2.S 5.5 14 15 273 120 63 26 26 12 15 30 2.8 5.5 13 15 256 125 60 24 24 61 15 31 2.8 13 15 242 54 21 141 Second- Run-off In Month foot -day a Maximum Minimum Mean acre-feet Oct 86.4 2.S 2.7 171 HOT 125.9 5.5 2.8 4*20 250 Dec 842.5 134 5.5 27.2 1,670 C 33,781.2 3,290 .6 92.6 66,990 Jan ua 685 115 12 18.9 1,160 Feb 10,541 2,610 37 376 20,910 Mar 42,024 13,140 242 1,356 83,350 Apr 11...... 5,106 232 118 170 10,130 2,488 118 54 4,930 Jui 1,259 60 24 42!o 2,500 Jul S89 65 16 22.2 1,360 AugUBt...... 649 141 12 20.9 1,280 Sep 521 40 13 17.4 1,030 1atar year 1937-3 64,916.8 13,140 2.7 178 128,700 132 SANTA CLARA RIVER BASIN Sespe Creek near F'illmore, Calif. Location.- Water-stage recorder, lat. 34°26'55", long. 118°55'35", in NEi sec. 12, T. 4 N., R. 20 W., 0.1 mile downstream from Little Sespe Creek and 3s miles north of Fillmore. Altitude, about 590 feet. Drainage area.- 254 square miles. Records available.- November 1934 to September 1938. September 1911 to September 1913 and October 1927 to November 1934 at site at Sespe, 3 miles downstream; records equiv alent . Average discharge.- 11 years (1927-38), 93.0 second-feet. Extremes.- Maximum discharge during year, 56,000 second-feet mr. 2, by slope-area method: minimum, 0.3 second-foot Oct. 20-22. 1927-38: Maximum discharge, that of Mar. 2, 1938; minimum, no flow at times in most years. Remarks.- Records good. Station destroyed by flood Mar. 2. Discharge for period of no gage heights, Feb. 12 to Sept. 30, computed on basis of 50 discharge measurements and records for Piru Creek near Piru and Santa Paula Creek near Santa Paula. About 6,360 acre-feet of water was diverted by Fillmore Irrigation Co. 1 mile above station. , oee tables of miscellaneous discharge measurements. Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. HOT. Do*. Jan. Fob. Mar. Apr. May June July Aug. Sept. 1 0.4 0.4 1.3 27 2,560 3,8OO 370 160 65 32 8 3.2 2 .4 .4 2.2 27 301 14,840 350 151 65 32 9 4.2 a .4 .4 4.1 26 4,320 7,090 340 146 59 30 11 5.0 4 .4 .4 4.1 26 1,620 4,110 340 140 54 30 12 4.8 6 .4 .4 5.9 26 672 2,920 339 136 52 SO 11 4.5 6 .4 .4 3.6 26 396 2,350 528 132 62 30 8 4.1 7 .4 .4 2.2 26 354 2,120 514 129 52 30 6.5 3.8 a .4 .4 1.6 26 343 2,080 295 125 52 28 6 5.6 9 .4 .4 2.9 25 956 1,840 277 121 54 27 6 4.5 10 .4 .4 22 25 1,400 1,600 260 117 56 25 6 5.5 11 .4 .5 653 24 10,680 1,810 244 111 58 24 5.5 4.3 18 .4 .6 402 24 2,160 4,410 230 106 56 23 5 3.7 13 .4 .6 136 23 970 3,000 220 106 56 22 4.7 S.8 14 .5 .6 82 22 758 2,100 210 105 54 21 4.4 3.9 16 .5 .7 57 109 660 1,600 200 105 51 20 4.3 4.2 16 .5 .7 46 71 600 1,290 193 104 48 20 4.5 4.7 17 .5 .8 37 45 580 1,110 186 103 48 19 5.6 5.5 18 .4 .8 32 40 566 960 180 105 48 18 6 6.5 19 .4 .7 28 37 572 880 177 102 64 18 6 6.5 20 .3 .6 26 34 480 820 177 99 60 17 6 5 21 .5 .6 24 31 430 TVS 177 96 60 16 6 4.2 22 .5 .6 28 32 384 700 177 88 51 15 6 3.6 25 .4 .5 46 31 344 640 177 81 42 14 6 3.2 24 .4 .6 36 30 290 586 177 81 42 13 4.5 3.0 25 .4 .8 31 31 261 550 180 82 40 13 3.7 2.8 26 .4 .7 54 31 257 580 176 83 38 13 3.4 2.6 27 .4 .6 31 32 262 490 174 76 56 13 3.2 2.5 28 .4 .6 30 34 1,570 460 172 75 36 13 3.0 2.4 29 .4 .9 29 34 _ 486 171 73 34 12 2.9 2.3 SO .4 1.0 28 34 _ 418 170 72 33 11 2.7 2.4 31 .4 - 28 57 - S08 64 9 2.6 - Seeond- Run-off In Month foot-daya Maxima HlnlBum Mean aore-fe«t 12.5 0.6 0.3 0.40 26 17.5 1.0 .4 .58 36 Deoei&er...... 1,889.9 653 1.5 61.0 3,750 76,704.4 6,260 .3 210 152,100 1,066 109 22 34.4 2,110 34,746 10,680 257 X 241 68,920 March...... 66,702 14,840 398 2)152 132,300 April...... 6*980 5YQ 170 233 13,840 May...... 5 2Y2 160 64 106 6,490 1^505 65 33 50 2 2 990 July...... 638 JJO 9 20*6 1*270 179.4 12 z'.s2 6 5.79 356 120.3 6.5 4.01 239 Water year 1937-3 117,128.6 14,840 .3 321 232,300 SANTA CLARA RIVER BASIN 133 Santa Paula Creek near Santa Paula, Calif. Location.- Water-stage recorder, lat. 34°23'40", long. 119°04'35", near east boundary of Ex Mission San Buenaventura grant, 50 feet upstream from Santa Paula Water Works diversion dam, and about 3 miles north of Santa Paula, Ventura County. Altitude, about 650 feet. Drainage area.- 39.8 square miles. Records available.- October 1927 to September 1938. April 1912 to September 1913 at site about 2£ miles upstream. October 1927 to February 1931 at site 500 feet down stream, below diversion of Santa Paula Water Works. Average discharge.- 11 years (1927-1938), 18.7 second-feet. Extremes.- Maximum discharge during year, 13,500 second-feet Mar. 2 (gage height, 10.56 feet), by slope-area method; minimum, 3.2 second-feet Oct. 19 and Sept. 14. 1927-38: Maximum discharge, that of Mar. 2, 1938; minimum, 0.3 second-foot Aug.25, 1933. Remarks.- Records good. About 230 acre-feet diverted above station during year. Discharge Oct. 1 to Nov. 29, Dec. 3, 6, 7, and 8, and July 25 to sept. 30 (computed by weir formula) furnished by Santa Paula Water Works. Discharge, In second-feet, water year October 1937 to September 193S Day Oct. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 6 4.5 12 9 287 683 90 44 20 16 9.5 7 2 5.5 4.2 7 10 48 3,040 81 40 23 16 9 7 3 6 4.7 4.9 9 819 1,100 79 39 20 16 9.5 7 4 5.5 4.7 6 e 312 639 79 36 16 17 9.5 6.5 6 4.6 4.7 7 7.5 120 434 77 36 15 16 8 7 6 4.3 5 4.6 S 90 339 72 35 15 16 6.5 7 7 4.2 5 4.6 8 81 299 68 34 14 16 7 7.5 8 4.4 4.3 4.5 8.5 79 299 66 32 15 16 7 7.5 9 4.8 3.9 4.0 8 144 269 61 31 15 15 6.5 7 10 4.8 3.8 6.5 7.5 166 247 61 29 15 15 6.5 7 U 4.3 4.2 216 7.5 771 299 59 28 16 12 5.5 7 12 4.0 5 54 7.5 384 754 58 27 15 12 5.5 6.5 13 4.1 4.8 9.5 7 201 565 53 25 15 13 6.5 6 U 4.9 5 7 8 155 400 48 26 16 15 6.5 3.2 16 4.9 5 6 32 108 326 45 28 16 14 6 4.8 16 4.1 4.6 5 12 95 280 44 31 16 13 6 4.6 17 4.5 4.3 4.6 10 95 247 43 29 16 13 6 6 18 3.6 4.6 4.4 9 90 225 42 29 17 12 6 6 19 3.2 4.4 4.2 8.5 98 211 42 27 18 11 5.5 5 20 4.2 4.0 5.5 8 88 201 45 27 19 10 5.5 4.7 21 4.2 3.8 8 8 85 196 44 25 19 10 5.5 3.6 22 4.1 3.8 10 7.5 81 174 44 25 19 10 5.5 4.1 25 4.1 3.3 36 7 77 151 43 24 19 10 5.5 4.0 24 4.2 4.2 13 7 66 140 45 25 19 10 6 4.4 25 4.2 4.7 11 6.5 62 133 51 25 17 9.5 5.5 6 26 4.3 4.2 12 6.5 61 124 44 26 18 9.5 5 4.1 27 4.6 3.7 11 6.5 66 117 42 23 17 10 5 5.5 28 4.7 3.7 10 7 410 111 29 39 25 17 10 6.5 5 A 4.6 3.9 11 6.5 _ 108 43 26 16 9.5 6.5 5 ou 4.8 4.9 10 6 _ 101 44 26 17 9.5 6.5 4.5 31 4.7 - 9.5 15 - 95 24 9.5 6.5 Second- Run-off In Month foot-days Maxljsun Minimum Mean acre-feet October...... 140.4 6 3.2 4.53 279 131.1 5.1 3.3 4.37 260 518.8 216 4.0 16.7 1,030 15,753.0 460 3.2 43.2 31,250 276.5 32 6 184*8 92 548 819 48 10,190 March...... 12 3O7 3,040 95 59 Y 24,410 April...... 1 '907652 90 39 55.1 44 23 29.3 1^800 510 23 14 17.0 1,010 July...... 391 5 17 5'9 5 12.6 777 5>np n 7*9.5 6.52 401 170 1 5 3.2 5.68 358 Water year 1937-2 8...... 22,345.8 3,040 3.2 61.2 44,320 134 VENTURA RIVER BASIN Matilija Creek at Matilija, Calif. Location.- Water-stage recorder, lat. 34°29'05", long. 119°18'30", in NEi sec. 29, T. 5 H., R. 23 W., half a mile northwest of Matilija. Altitude, about 970 feet. Drainage area.- 55 square miles, Records available.- October 1927 to September 1938. Average discharge.- 11 years, 29.1 second-feet. Extremes.- Maximum discharge during year, 15,900 second-feet Mar. 2, by slope-area method; minimum, 6 second-feet Oct. 21-29. 1927-38: Maximum discharge, that of Mar. 2, 1938; minimum, 0.4 second-foot Oct. 28, 1930. Remarks.- Records good except those for periods of missing gage heights, Mar. 2-4, Mar. 28 to Sept. 30, which were computed on basis of 42 discharge measurements and records for stations on nearby streams and are fair. No diversion above station. Results of eight discharge measurements furnished by Ventura County Water Survey. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Sea. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 7 7 7 11 427 888 1YO 76 37 23 15 11 g 7 6.5 8 11 66 4,850 160 70 42 24 15 12 3 7 6.5 Y.5 10 516 2,120 150 69 42 24 15 11 4 7 7 Y.5 10 268 1,280 147 68 39 24 15 11 6 7 7 7 10 155 1,270 143 68 36 25 14 11 6 Y 7 7 10 111 816 137 67 36 25 14 9.5 7 6.5 7 7 10 90 765 129 66 35 24 15 10 8 7 7 7 10 81 786 122 65 35 24 16 11 9 6,5 7 12 10 235 694 116 64 34 24 16 9.5 10 6.5 7 19 10 319 632 112 62 33 24 15 10 11 6.5 Y 118 10 1,970 792 109 60 33 23 15 11 12 6.5 Y 46 10 766 1,860 105 58 33 22 12 12 13 7 7 25 10 408 1,350 96 55 32 20 13 12 14 Y.5 Y 20 10 332 816 89 58 33 19 13 9 15 7 7 18 18 262 544 83 62 32 19 13 9 16 7 6.5 16 13 21Y 480 79 65 32 18 14 9 17 6,5 6.5 16 12 191 445 76 59 31 18 13 11 18 6.5 6.5 14 11 188 412 76 59 31 18 14 12 19 6.5 6.5 14 11 175 377 76 55 32 18 13 10 20 6.5 6.5 13 11 157 356 82 53 32 18 13 9 21 6 6.5 13 11 143 SS2 82 51 30 18 13 6 22 6 6.5 14 10 134 313 82 49 29 18 12 9 23 6 6.5 16 10 123 294 82 47 27 18 12 7.5 24 6 7 14 10 115 276 88 46 27 17 12 8 25 6 7 13 10 113 262 95 45 26 17 12 9 26 6 6.5 14 10 113 245 86 44 27 17 12 8.5 27 6 6.5 13 10 111 232 86 40 27 17 11 9 28 6 7 12 10 410 220 83 41 26 17 13 9.5 29 6 7 11 11 _ 205 83 41 25 17 12 9.5 30 6.5 7 11 10 _ 192 79 41 25 17 11 9.5 31 7 - 11 41 - 182 - 40 - 16 11 - Second- Maximum Minimum Mean Run-off in Month foot-days acre-feet October...... 203.5 7.5 6 6.56 404 204.0 7 6.5 6 .80 405 December...... 531.0 118 7 17.1 1,050 Calendar year 1937...... 25,321.0 1,270 6 69.4 50,230 361 41 10 11.6 716 February...... 8,196 1,970 66 16,260 24,286 4,850 182 784 48,170 April...... 3,103 170 76 103 6,150 1,744 76 40 56*3 3,460 42 25 32.0 1,900 July...... 623 25 16 20.1 1,240 414 16 11 13.4 821 295.5 12 6 9.85 586 Water year 1937-j 40,920 4,850 6 112 81,160 VENTURA RIVER BASIN 135 Ventura River near Ventura, Calif. Location.- Water-stage recorder, lat. 34°20'55", long. 119°18'20", in southeast corner of Santa Ana grant, at highway bridge at entrance to Foster Memorial Park, a quarter of a mile downstream from Ventura diversion dam and Coyote Creek and 5 miles north of Ventura, Ventura County. Altitude, about 210 feet. Drainage area.- 187 square miles. Records available^- September 1911 to January 1914 and October 1929 to September 1938. Average discharge^- 11 years (1911-13, 1929-38), 62.1 second-feet. Extremes..- Maximum discharge during year, 39,200 second-feet Mar. 2 (gage height, 19.2 feet), by slope-area and contracted-opening methods; minimum, 6 second-feet Oct. 12. 1911-13, 1929-38: Maximum discharge, that of Mar. 2, 1938; no flow at times each year except 1937-38. Remarks.- Records good. Water diverted from Ventura River and tributaries above station for irrigation and municipal use. Results of 11 discharge measurements furnished by Ventura County Water Survey. Discharge, in second-feet, water year October 1937 to September 1938 Day Got. HOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 8 8 10 19 1,700 2,890 304 146 70 45 24 18 2 8 9 10 19 174 17,950 288 136 67 44 24 18 3 8 10 10 18 1,540 6,970 267 133 65 44 23 19 4 9 8.5 10 18 812 2,770 257 127 62 44 23 19 E 8 7.5 11 19 406 1,660 257 120 62 44 18 20 6 7 7.5 11 17 264 1,300 247 117 62 42 13 18 7 7 7.5 12 17 206 1,100 237 108 62 40 10 16 8 6 8.5 12 17 177 1,310 228 108 63 40 16 16 9 6 8.5 14 17 421 1,020 228 105 65 37 20 17 10 7 8.5 24 16 494 882 219 102 65 35 21 17 11 7 7.5 263 17 6,410 1,190 219 100 63 37 21 18 12 6 7 126 17 1,890 5,840 219 100 63 37 19 18 13 7 7 58 16 832 3,060 219 97 60 35 17 8.5 14 8 7.5 45 16 730 1,880 206 97 53 35 19 5.5 15 8 7.5 33 29 524 1,480 197 97 50 34 20 6 16 8 7.5 30 26 407 1,170 188 100 48 33 20 9 17 8 7.5 28 24 341 1,010 180 91 48 31 18 15 18 7.5 7 24 22 301 848 172 91 47 29 20 16 19 7 7 23 21 295 746 161 -91 48 26 18 16 20 8 7 21 18 255 652 165 88 50 26 18 15 21 7.5 7 20 17 231 592 161 86 47 26 18 14 22 7 7 22 17 206 541 153 79 44 28 16 14 23 7 8.5 26 18 201 510 149 76 42 27 6.5 14 24 7 8.5 22 17 197 478 161 74 42 26 6 14 25 8.5 8 20 17 185 449 184 74 44 28 6.5 15 26 8 8 23 17 182 421 165 79 44 27 14 16 27 9 8 21 18 182 400 149 79 44 24 16 15 28 9 8.5 20 18 1,060 381 149 79 44 25 16 14 29 7.5 9.5 20 19 363 146 76 44 25 16 14 30 7.5 10 20 19 344 153 72 45 24 16 14 31 8 20 30 321 72 24 16 Seoond- Run-off In Month foot-days M^T'tlPl'TO Minimum Mean acre-feet Oet 234.5 9 6 7.56 465 Hoi 239.0 10 7 7.97 474 Dee 1,009 263 10 32.5 2,000 C alendar year 193 7...... 52,174.6 6,420 4.6 143 103,500 Jan 590 30 16 19.0 1,170 Pet 20,623 6,410 174 737 40,910 Hai 60,528 17,950 321 1,953 120,100 Apr 6,028 304 146 201 11,960 Kaj 3,000 146 72 96.8 5,950 JUE 1,613 70 42 53.8 3,200 Jul 1,022 45 24 33.0 2,030 Aug 529 24 6 17.1 1,050 Sej 449 20 5.5 15.0 891 1ater year 1937-3! 95,864.5 17,950 5.5 263 190,100 136 VENTURA RIVER BASIN Coyote Creek near Ventura, Calif. Location.- Water-stage recorder, lat. 34°21'20", long. 119°18'50", near southeast corner of Santa Ana grant, 200 feet downstream from highway bridge,half a mile upstream from Junction with Ventura River, and 5i miles northwest of Ventura, Ventura County. Altitude, about 250 feet. Drainage area.- 41.1 square miles. Records available.- October 1927 to September 1932 and October 1933 to September 1938. Average discharge.- 10 years (1927-32, 1933-38), 12.4 second-feet. Extremes.- mxlmum discharge during year, 11,500 second-feet Mar. 2, by slope-area method; minimum, 0.1 second-foot Nov. 27. 1927-32, 1933-38: Maximum discharge, that of Mar. 2, 1938; no flow Aug. 19 to Sept. 18, 1929. Remarks.- Records good. Discharge for periods of missing gage heights, Oct. 13-19, June 24-28, Aug. 18 to Sept. 19, computed on basis of seven discharge measurements. Results of 10 discharge measurements furnished by Ventura County Water Survey. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. SOT. Deo. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 0.2 0.3 0.2 1.9 465 524 34 16 4.7 2.6 1.1 0.5 2 .2 .3 .2 1.9 54 3,470 32 14 4.5 2.6 1.1 .5 3 .2 .3 .2 1.9 303 800 31 13 5 2.6 1.0 .5 4 .2 .3 .2 1.9 254 350 28 12 5 2.5 1.1 .5 5 .2 .3 .2 1.9 100 247 27 12 4.5 2.5 1.2 .5 6 .2 .3 .2 1.9 51 162 27 11 4.5 2.3 1.1 .5 7 .2 .2 .2 2.1 36 157 27 9.5 5 2.3 1.1 .5 8 .2 .2 .2 2.1 26 142 27 9 5 2.1 1.1 .5 9 .2 .2 .3 1.9 96 120 26 9 5.5 1.9 .9 .5 10 .2 .2 .4 2.1 91 106 25 9 5.5 1.9 .7 .5 11 .2 .2 128 2.5 663 173 25 8 5.5 1.8 .7 .5 12 .2 .2 36 3.3 271 516 25 8 5 1.8 .7 .5 IS .2 .2 8 2.8 131 303 24 8 4.7 1.8 .7 .5 14 .2 .2 3.3 2.5 104 190 24 8 4.7 1.7 .7 .5 15 .2 .2 1.7 26 71 145 23 8.5 4.7 1.6 .8 .5 16 .2 .2 1.1 9 61 122 22 9 4.3 1.6 .8 .6 17 .2 .2 1.0 6 50 102 21 8.5 5 1.4 .8 ,6 18 .2 .2 1.1 4.7 44 91 20 8.5 4.7 1.3 .8 .5 19 .2 .2 1.2 3.9 51 80 19 8 4.0 1.2 .7 .4 20 .2 .2 1.2 2.8 37 72 18 8 3.8 1.2 .7 .4 21 .3 .2 1.5 2.3 31 66 18 7.5 3.6 1.2 .6 .4 22 .3 .2 2.3 2.3 30 62 18 7 3.2 1.2 .6 .5 23 .3 .2 7 2.1 26 61 16 6.5 2.9 1.2 .5 .6 24 .3 .2 3.6 1.5 25 59 16 6 2.9 1.1 .5 .5 85 .3 .2 2.5 1.5 21 58 15 6 2.6 1.1 .5 .4 26 .3 .2 3.6 1.7 20 51 15 6.5 2.8 1.1 .5 .5 27 .3 .1 2.5 1.9 20 48 14 6.5 2.7 1.1 .5 .4 28 .3 .2 2.3 2.3 328 46 14 6.5 2.7 1.1 .5 .5 29 .3 .2 2.3 2.3 _ 42 14 6.5 2.6 1.1 .5 .5 SO .3 .2 2.3 1.9 _ 38 16 6 2.6 1.1 .5 .5 31 .3 - 2.1 10 - 36 5.5 - 1.1 .5 - Second- Month Maximum Run-off In f dot-days Minimum Mean acre-feet 7e'.s 3 0.3 0.2 0.24 14 .3 .1 22 13 216.9 128 .8 7^00 430 10,611.2 1,750 .1 29.1 21,050 112.9 26 1.5 3.64 224 3,462 66.3 20 124 6,870 Karen...... 8,439 3,470 36 272 16,740 April...... 661 54 14 22 0 1,310 Kay...... 267.5 16 5.5 8«63 531 124.4 5.5 2»6 4.15 247 July...... 51.1 2.6 1.1 1 66 101 23.5 1.2 .5 76 47 14.7 .6 .4 .49 29 Water year 1937-38...... 13,386.8 3,470 .1 36.7 26,560 SANTA YNEZ RIVER BASIN 137 Santa Ynez River at Juncal Reservoir, near Montecito, Calif. Location.- Water-stage recorder, lat. 34°29'30", long. 119°30'50", in sec. 28, T. 5 N., R. 25 W., at Juncal Reservoir dam, 8.5 miles northeast of Montecito. Altitude, about 1,950 feet. Records available.- December 1930 to September 1938. Remarks.- Montecito County Water District diverts water at dam for municipal supply of city of Montecito. Records furnished by Montecito County Water District. Discharge, In second-feet, water year October 1937 to September 1938 Month Second- Maximum Minimum Mean Run-off In foot -days acre-feet 38 17 3 CO 44.2 16 .4 1.42 88 Calendar year 1937.. 4,661.92 235 .4 12.8 9,260 32 4 792 rp May...... Water year 1937-38.. 8,251.8 1,240 .2 22.6 16,330 Note.- Discharge Is sum of change In storage plus diversion to city plus release to river plus waste over spillway plua evaporation minus precipitation. Santa Ynez River near Santa Barbara, Calif. Location.- Lat. 34°31'40", long. 119°41'00", about on line between sees. 10 and 11, T. 5 N., R. 27 W., at Gibraltar dam, 7 miles north of Santa Barbara. Altitude, about 1,200 feet. Drainage area.- 219 square miles. Records available.- November 1903 to April 1907, October 1907 to January 1908, February 1910 to November 1918, and April 1920 to September 1938. Average discharge.- 24 years (1904-06, 1911-14, 1916-17, 1920-38), 53.5 second-feet. Remarks.- Discharge represents inflow to Gibraltar Reservoir and is computed from reser voir records. Flow regulated by storage in Juncal Reservoir. During year Montecito County Water District diverted 696 acre-feet from Juncal Reservoir. Records furnished by city of Santa Barbara. Discharge, In second-feet, water year October 1937 to September 1938 Second- Month Run-off In foot-days Maximum Minimum Mean acre -feet 0 0 0 0 0 0 0 0 0 0 December ...... 339.9 242 0 11.0 674 Calendar year 1937. . 38,757.6 3,000 0 106 76,870 194.0 22 2.S 6.26 385 13,592 4,400 122 486 26,980 39,887 9,130 213 1,286 79,090 4,781 222 120 159 9,480 May...... 2,553.9 125 46 82.4 5,070 816.0 45 11 27.2 1,620 194.4 13 1.7 6.27 586 20.1 1.7 0 .65 39.9 0 0 0 0 0 Water year 1937-38.. 62,378.3 9,130 0 171 123,700 Note.- Discharge Is sum of change In storage plus diversion to city plus release to river plus waate over spillway plus evaporation minus precipitation. SANTA YNEZ RIVER BASIN Santa Ynez River below Gibraltar Dam, near Santa Barbara, Calif. Location.- Lat. 34°31'40", long. 119°41'00", about on line between sees. 10 and 11, T. 5 N., R. 27 W., downstream from Gibraltar Dam, 7 miles north of Santa Barbara. Altitude, about 1,200 feet. Records available.- April 1920 to September 1938. Average discharge.- 17 years, 34.9 second-feet. Remarks.- Discharge represents flow in Santa Ynez River passing Gibraltar Reservoir. Flow regulated by storage in Gibraltar and Juncal Reservoirs. During year city of Santa Barbara diverted 2,776 acre-feet from Gibraltar Reservoir and Nontecito County Water District diverted 696 acre-feet from Juncal Reservoir. Records furnished by city of Santa Barbara. Discharge, In se.oond-feet, water year October 1937 to September 1938 Run-off in Month foot-days Maximum Minimum Mean acre-feet December ...... 6.1 .5 0 .20 12 Calendar year 1937 ..... 37,620.6 2,920 0 103 74,620 234 ggo Mmr 1 22 .50 30 Water year 1937-38..... 60,508.8 8,530 0 166 120,000 Note.- Discharge Is sum of waste over spillway plus release to river. SANTA YNEZ RIVER BASIN 139 Santa Ynez River near Santa Ynez, Calif. Location.- Water-stage recorder, lat. 34035'20", long. 120°01'25", in Canada de los PInos grant, at San Marcos road bridge, 4 miles southeast of Santa Ynez, Santa Barbara County. Altitude, about 500 feet. Drainage area.- 435 square miles. Records available.- December 1928 to September 1931, October 1932 to September 1938. Extremes,.- Maximum discharge during year, 43,700 second-feet Mar. 2 (gage height, 17.90 feet), from rating curve extended above float measurement of 34,100 second-feet; no flow during parts of November and December. 1929-31, 1932-38: Maximum discharge, that of Mar. 2, 1938; no flow for several months each year. Remarks.- Records good. Regulation by storage in Juncal and Gibraltar Reservoirs; di versions above station to cities of Montecito and Santa Barbara. Results of discharge measurements furnished by city of Santa Barbara. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. SOT. Deo. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.4 0.1 0 2.2 796 2,800 535 186 69 30 4.5 1.8 2 .4 .1 0 2.2 172 17,910 609 160 65 26 5 1.8 3 .4 0 0 2.1 1,490 9,140 4S8 137 52 26 3.0 1.8 4 .4 0 0 2.0 2,040 4,210 463 125 43 25 3.5 1.8 5 .4 0 0 1.9 974 3,250 473 123 34 24 4.0 1.8 6 .3 0 0 1.9 441 2,470 428 123 36 22 4.5 2.0 7 .3 0 0 1.9 27S 2,940 400 117 39 21 4.5 1.8 8 .3 0 0 1.9 197 3,2SO 380 117 44 21 4.5 2.0 9 .3 0 0 2.0 265 2,520 366 117 43 22 4.5 1.8 10 .3 0 0.2 2.2 Y2B 2,180 356 115 52 19 4.5 1.8 11 .3 0 32 2.2 9,700 2,130 343 112 69 15 3.5 1.5 12 .3 0 94 2.4 3,400 9,180 343 112 59 15 3.0 1.2 IS .3 0 14 2.5 1,660 6,120 348 109 56 15 2.5 1.2 14 .3 0 6.5 3.1 1,250 4,120 325 107 54 13 2.5 1.2 15 .2 0 4.6 4.0 1,010 3,190 309 109 52 12 2.5 1.5 16 .2 0 3.5 3.3 766 2,380 289 117 46 12 2.2 1.5 17 .2 0 2.5 3.1 591 1,920 2S1 117 44 12 2.2 1.2 18 .2 0 2,2 3.1 491 1,600 266 114 43 12 2.2 1.2 19 .2 0 1.9 3.5 496 1,390 254 112 41 11 2.2 1.5 20 .2 0 1.8 3.7 478 1,260 242 109 41 11 2.5 1.2 21 .2 0 1.6 3.9 386 1,170 224 96 41 11 2.5 1.2 22 .2 0 1.6 3.9 356 1,030 214 94 44 9 2.5 1.0 23 .2 0 1.6 3.9 331 958 203 36 43 9 2.5 .8 24 .2 0 1.6 3.9 335 894 217 81 41 8.5 z'.zg g .8 25 .2 0 1.6 3.9 294 810 277 77 34 9 .5 26 .2 0 1.8 3.7 269 750 250 72 36 8.5 2.2 .5 27 .2 0 1.8 3.7 254 715 200 72 38 6.5 2.0 1.0 28 .2 0 1.9 4.4 421 679 183 69 36 6.5 2.0 1.0 20 .2 0 2.1 4.9 344 193 74 34 7 2.0 1.0 50 .2 0 2.1 4.9 600 193 74 34 6 2.0 1.0 31 .2 - 2.1 7.7 - 572 72 5 2.0 - Second- Ua-rlmry Run-Off in Month foot-days Minimum Mean acre-feet 8.1 0.4 0.2 0.26 16 .2 .1 0 .007 .4 183.0 94 0 5.90 363 77,513.8 5,560 0 212 153,700 100.0 7.7 1.9 3.23 198 29,869 9,700 172 1,067 59,240 92,812 J.1 71 fV±\JQl ft 572 2,994 184,100 April ...... 9,562 535 183 318 18,950 Kay...... 3,305 186 69 107 6,560 1,353 69 34 45.1 2,680 July...... 450.0 30 5 14.5 893 91.9 5 2.0 2.96 182 40.4 2.0 .5 1.35 80 Water year 1937-J 8...... 137,764.6 17,910 0 377 273,300 140 SANTA YNEZ RIVER BASIN Santa Ynez River at Solvang, Calif. Location.- Water-stage recorder, lat. 34°35'10", long. 120°08'40", In San Carlos de Jonata grant, at Mission Bridge, 25 feet below mouth of Allsal Creek, and 0.9 mile south of Solvang, Santa Barbara County. Drainage area.- 585 square miles. Records available.- October 1928 to November 1936 and June 1937 to November 1938 (irrl tion seasons only). Remarks.- Records good. Gage-height record and results of discharge measurements furnished by city of Santa Barbara. See page 366 for discharge measurements made during non-irrigation season. Discharge, In second-feet, 1937-38 Day oot. HOT. June July Aug. Sept. Oct. Nov. 1 7 6 62 30 7.5 4.7 6 6.5 2 7.5 5 55 50 6.5 4.7 6 6.5 S 7 4.4 47 30 5.5 4.7 5.5 6 4 6.5 4.7 40 28 5.5 5.5 6 6 6 6 5.5 36 26 6 6 7 6 6 5 5.5 36 26 6 5.5 7 6 7 4.7 6 31 25 6.5 4.7 9.5 5.5 8 4.4 6.5 32 24 6.5 5 8 8 9 4.1 7 32 21 7 5 7.5 8 10 4.1 7 40 21 7.5 6 7 7.5 11 3.8 7 49 20 7.5 6 7 7.5 12 3.8 6 49 16 7 6 7 7 13 3.8 5.5 51 16 7 5.5 7 7 14 3.5 6 47 17 6 5.5 7 7 16 3.8 7 45 16 6.5 6 7 7 16 3.5 7 38 15 7.5 6 7.5 7 17 3.5 7.5 34 15 7 6 7 6.5 18 3.5 6.5 34 14 6.5 6 6.5 8.5 19 3.3 5.5 32 13 7 5.5 6 6.5 SO 3.5 6 31 13 6 5.5 6 9 Si 3.3 6.5 31 13 6 5.5 6 6 22 3.3 6 28 11 6 5.5 5.5 8 23 4.4 6 27 10 5.5 5.5 6 6.5 24 4.7 5.5 27 10 5.5 6 6 6.5 85 5 6 28 9.5 5.5 6 5.5 8.5 86 5.5 6 26 9 5.5 6 6 9 27 6 6 30 8.5 5.5 7 7 6.5 28 5.5 6 28 6.5 5.5 7 7 8.5 29 5.5 6.5 28 6 5.5 6.5 7 9 30 5.5 7 26 6 5.5 6 7 9.5 31 6 - 6 4.7 - 7 - Month £££. Hlnlmu, He.n ^-f^ 1936 October...... 147.0 7.5 3.3 4.74 292 183.1 7.6 4.4 6.10 363 1937 1,104 62 27 36.8 2,190 July...... 525.5 30 8 17.0 1,040 197 2 6»5 4.7 6.36 391 170 8 7 4.7 5.69 339 207I5 9.5 5.5 6.69 412 229 9*5 5.5 7.63 454 The parl ad...... 2,434 4,830 SANTA YNEZ RIVER BASIN 141 Santa Ynez River near Lompoc, Calif. Location.- Water-stage recorder, lat. 34°38'30", long. 120°25'50", near boundary of La Mision Vieja La Purisima grant, at highway bridge, 14 miles east of Lompoc, Santa Barbara County. Altitude, about 100 feet. Drainage area.- 790 square miles. Records available.- November 1906 to September 1918 (for 1909, gage heights only), April 1925 to September 1938. Average discharge.- 22 years, (1907-8, 1910-18, 1925-38), 229 second-feet. Extremes^- Maximum discharge during year, 50,100 second-feet Mar. 3 (gage height, 28.10 feet), from rating curve extended above float measurement of 38,000 second-feet; minimum, 0.5 second-foot Oct. 13-14. 1906-18, 1925-38: Maximum discharge, that of Mar. 3, 1938; no flow during some periods in each of the years of 1929-31, 1934, 1936, and 1937. Remarks.- Records good. Water diverted by city of Santa Barbara at Gibraltar Dam; also, some water for irrigation is pumped from wells along banks of river above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. *«y June July Aug. Sept. 1 1.1 0.3 0.9 12 643 2,590 726 308 106 35 3 4.3 8 1.0 .8 1.0 12 746 8,150 679 298 97 35 7.5 4.6 s 1.0 .8 1.0 11 992 24,760 646 279 94 33 7.5 4.9 4 .9 .8 1.0 10 2,190 7,050 620 255 84 35 8 5 6 .7 .9 1.0 10 1,940 4,160 601 241 77 30 8 4.6 6 .7 .9 1.0 10 1,100 3,180 588 224 72 30 9 4.1 7 .6 .8 1.2 10 628 2,670 562 211 68 28 10 3.8 8 .6 .8 1.4 11 441 2,960 531 202 62 28 10 4.1 9 .6 .8 2.1 12 522 3,050 506 202 57 25 9 4.3 10 .6 .8 2.2 13 738 2,980 493 202 55 23 9 4.3 11 .6 1.0 5.5 14 6,330 2,970 475 202 55 20 9 4.3 18 .6 1.0 10 14 15,010 4,890 444 186 62 20 8 4.3 IS .5 1.0 6.5 15 3,520 6,620 434 171 59 20 7.5 4.1 U .5 1.0 8.5 17 2,220 4,740 428 156 62 18 6.5 4.1 16 .6 1.0 8.5 36 1,540 3,830 422 152 62 17 6 4.1 16 .7 1.1 6.5 25 914 3,430 417 163 62 17 6 3.8 17 .7 1.0 6 22 1,040 2,420 400 171 59 17 6 3.4 18 .8 1.0 6 21 855 2,210 379 175 57 16 5 3.6 19 .7 1.0 7 21 791 2,010 358 171 53 17 4.9 3.8 EO .8 1.0 8 22 766 1,970 342 171 49 17 4.9 3.6 81 .7 1.0 10 19 694 1,680 337 171 47 16 5 3.4 88 .6 1.2 10 18 623 1,460 318 160 45 16 5 3.4 83 .6 1.2 12 18 542 1,190 288 142 43 14 4.9 3.2 84 .7 1.0 11 16 485 1,150 293 132 39 14 5 3.4 85 .6 1.1 10 15 458 1,090 313 128 41 14 4.9 3.6 86 .7 1.2 11 16 398 1,020 322 122 41 14 4.3 3.8 87 .7 1.2 11 16 355 955 Oft 303 116 41 13 4.3 6 J5O .7 1.3 11 16 463 895 288 116 41 12 3.8 7 29 .8 1.2 11 19 -. 858 SO 279 112 39 IS 3.8 7 .8 .9 11 20 _ 812 298 112 37 10 4.1 6.5 31 .8 - 11 76 - 774 112 10 4.1 Second- Run-off In Month foot-days MflTl TffllBl Minimum Mean ao re-feet 22.0 1.1 0.5 0.71 44 29 .6 1.3 . 8 99 59 204.3 12 .9 6.59 405 105,452.5 7' * tJ£*^PO'V .3 389 209,200 567 76 10 18 1,120 46,944 15,010 355 1,676 93,110 108,524 24 760 774 3,501 215,300 April...... 13,090 726 279 436 25,960 May...... 5,563 308 112 179 11,030 1, 766 106 58.9 3,500 July...... 626 35 10 20 2 1,240 199 10 6 42 395 130.4 7 3)2 4.35 259 Water year 1937-S 177,665.3 24,760 .5 487 352,400 142 SANTA MARIA RIVER BASIN Cuyama River near Santa Maria, Calif. Location.- Water-stage recorder, lat. 35°00'50", long. 120°16'45", in Suey grant, at highway bridge, 3 miles upstream from Alamos Creek, and 10 miles northeast of Santa Maria, Santa Barbara County. Altitude, about 610 feet. Drainage area.- 902 square miles. Records available.- December 1929 to September 1938. Extremes,.- Maximum discharge during year, 17,300 second-feet Mar. 3 (gage height, 16.6 feet} by slope-area method; 0.3 second-foot Oct. 1. 1929-38: Maximum discharge, that of Mar. 3, 1938; no flow for long periods during some years. Remarks.- Records fair. No diversion. Discharge for period of missing gage heights, Oct. 12-19 computed by interpolation between measurements, that for Feb. 6-12 and Mar. 4-9 computed on basis of records for Kuasna River near Santa Maria. Discharge, in second-feet, water year October 1957 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Kar. Apr. May June July Aug. Sept. 1 0.3 0.5 6 10 73 114 71 54 14 11 3.6 2.3 2 .4 .5 6 11 48 325 74 47 12 11 3.6 3.1 3 .4 .4 6 10 326 5,350 72 42 12 11 3.6 4.2 4 .4 .5 6 10 157 2,120 69 39 13 11 3.6 3.3 6 .4 .6 6.5 10 134 800 76 36 13 11 3.6 3.3 6 .4 .6 6.5 10 115 400 68 34 14 10 3.6 3.9 7 .4 .6 6.5 10 100 290 64 33 14 10 3.6 3.6 8 .4 .6 7.5 10 94 375 60 31 13 9 3.6 3.3 9 .4 .6 9 10 200 290 59 30 13 8.5 3.6 3.1 10 .4 .6 14 10 428 220 56 29 13 7.5 3.6 2.7 11 .4 .8 39 10 2,920 220 56 28 13 6.5 3.3 2.7 12 .4 .6 34 10 992 962 58 27 13 6.5 3.3 2.5 13 .4 .6 18 10 326 1,240 62 26 13 6 3.1 2.3 14 .4 .6 15 10 246 690 62 26 13 5.5 3.1 2.1 15 .4 .6 21 24 144 515 58 25 13 5.5 2.9 1.9 16 .5 .6 15 18 104 400 55 25 13 5.5 2.9 1.9 17 .5 .8 11 16 87 332 51 24 13 5.5 2.9 1.7 18 .5 .6 10 18 76 290 49 23 13 6 2.7 1.9 19 .5 .6 10 18 87 255 47 23 13 5 2.7 2.1 20 .5 .6 10 17 78 232 44 22 13 5 2.7 2.3 21 .5 1.1 10 15 74 204 43 22 12 5 2.5 2.5 22 .5 2.0 10 14 71 183 39 22 12 5 2.5 2.7 23 .6 2.4 11 14 68 159 38 22 12 5 2.5 2.5 24 .6 3.3 10 13 68 146 51 22 12 5 2.3 2.5 25 .5 3*8 10 12 66 129 69 20 12 5 2.3 2.5 26 .5 3.8 11 12 64 119 64 19 12 5 2.3 2.7 27 .6 4.3 11 12 64 104 51 18 11 5 2.3 4.2 28 .6 5.5 10 15 72 96 46 17 11 5 2.3 5 29 .5 5.5 11 22 90 58 16 11 5 2.3 4.4 30 .6 6 11 20 78 57 15 11 4.2 2.3 4.2 31 .6 10 21 72 14 3.6 2.3 Seoond- Run-off in Month foot-days HaximuBi Ml*) t-THlff" Mean acre-feet OCt 14.5 0.6 0.3 0.47 29 NOT! 49.6 6 .4 1.65 98 Dee 372.0 39 6 12.0 738 C 21,760.9 3,560 .3 59.6 43,170 Jan 422 24 10 13.6 837 Pet 7,2B2 2,920 48 260 14,440 Kar 16,800 5,350 72 542 33,320 Apr 11...... 1,727 76 38 57.6 3,430 May 831 54 14 26.8 1,650 Jim 377 14 11 12.6 748 Jul 208.8 11 3.6 6.74 414 Aug 91.5 3.6 2.3 2.95 181 Bap 87.4 5 1.7 2.91 173 1ater year 1937-3 28,262.8 5,350 .3 77.4 56,060 SANTA MARIA RIVER BASIN 143 Huasna River near Santa Maria, Calif. Location.- Water-stage recorder, lat. 35°01'20", long. 120°19'20", In Suey grant, half a mile upstream from junction with Guyana River and 8 miles northeast of Santa Maria, Santa Barbara County. Altitude, about 600 feet. Drainage area.- 119 square miles. Records available.- December 1929 to September 1938. Extremes.- Maximum discharge during year, 11,400 second-feet Feb. 11 (gage height, 11.26 feet),by slope-area method; minimum, 0.7 second-foot Oct. 1-9. 1929-38: Maximum discharge, that of Feb. 11, 1938; no flow during parts of several years. Remarks.- Records fair. No diversion above station. Discharge for periods of missing gage heights Oct. 1 to Dec. 10, and Dec. 14 to Jan. 31, computed on basis of five dis charge measurements and record for Cuyama River near Santa Maria. Discharge, In second-feet, water year October 1937 to September 1953 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 304 271 59 32 7 4.8 1.9 1.1 2 .7 1.1 2.S 2.4 143 546 55 29 7 G 1.9 1.1 3 .7 1.1 3.0 2.4 597 910 52 27 7 5 2.1 1.0 4 .7 1.2 3.2 2.4 427 615 48 25 7 5 2.0 1.0 6 .7 1.2 3.4 2.4 243 427 51 23 6.5 5.5 2.0 1.1 6 .7 1.2 3.7 2.5 163 334 47 21 7 4.5 2.1 1.1 7 .7 1.3 4.0 2.5 127 377 44 21 7 4.5 2.9 1.2 S .7 1.3 4.6 2.5 105 490 43 19 6.5 4.5 2.8 1.2 9 .7 1.3 5.4 2.5 193 334 42 18 7 4.3 8.4 l.E 10 .8 1.3 14 2.6 340 264 42 IS 6.5 4.3 2.0 1.2 11 .8 1.4 220 2.6 4,630 261 40 17 6.5 4.3 1.7 1.1 12 .8 1.4 171 2.7 986 929 39 16 6 4.1 1.6 1.1 13 .8 1.5 26 2.7 493 1,156 39 16 6 3.9 1.6 1.0 14 .8 1.5 13 2.7 552 640 36 15 6 3.7 1.7 1.0 16 .8 1.5 8 2.8 395 467 36 15 6 3.5 1.3 .9 16 .8 1.6 5.5 2.9 306 363 35 15 6 3.5 1.8 .9 17 .8 1.7 4.3 2.9 240 295 33 15 6 3.5 1.7 .9 18 .8 1.7 3.7 3.0 218 243 32 15 6 3.4 1.8 1.0 19 .9 1.8 3.4 3.1 252 S12 30 14 6 3.2 1.7 1.1 EO .9 1.8 3.2 3.1 173 190 30 13 6 3.2 1.6 1.1 21 .9 1.9 3.1 3.2 147 169 28 12 6 3.1 1.5 1.1 22 .9 1.9 2.9 3.3 123 157 26 12 5.5 2.9 1.5 1.1 23 .9 2.0 2.8 3.4 101 139 25 11 5.5 2.9 1.4 1.2 24 .9 2.1 2.7 3.5 87 135 28 11 6 2.9 1.3 l.E £5 .9 2.1 2.7 3.6 74 121 40 10 5 2.8 1.3 1.3 £6 1.0 2.2 2.7 3.7 64 111 35 9.E 5 2.7 1.3 1.5 27 1.0 2.3 2.5 3.8 59 97 30 9 5 2.3 1.2 2.2 28 1.0 2.4 2.5 4.0 78 89 30 8.5 5 2.3 1.1 2.0 29 1.0 2.5 2.5 4.4 83 35 8 5 2.2 1.1 1.8 30 1.0 2.6 2.4 4.9 72 35 7.5 4.8 2.1 1.1 1.6 31 1.1 2.4 6 64 7 2.0 1.1 Second- Rim-off In Month foot -days Maximum Minima Mean acre-feat Oct 25.9 1.1 0.7 0.84 51 No? 50.0 2.6 1.1 1.67 39 Doc 534.1 220 2.4 17.2 1,060 C alendar year 1937...... 19,899.5 5,010 .7 54.5 39,470 Jan 96.9 6 2.4 3.13 19E Pet 11,620 4,630 G9 415 23,050 Mar 10,661 1,156 64 841 20,950 Apr 1,145 69 25 38.2 2.E70 May 489.5 32 7 15.8 971 Jun 180.8 7 4.8 6.03 369 Jul 111.9 5,5 £.0 3.61 SEE Aug 53.0 S.9 1.1 1.71 106 Sep 36.2 £.2 .9 1.E1 72 flmter year 1937-3 24,904.3 4,630 .7 68. £ 49,400 144 SALINAS RIVER BASIN Salinas River near Santa Margarita, Calif. Location.- Water-stage recorder, lat. S5°24'20", long. 120°34'05", in Ni sec."15, T. 29 S., R. 13 E., 250 feet dovmstream from Calf Canyon highway bridge, 250 feet upstream from Morano Creek, and 2-J miles northeast of Santa Margarita. Altitude, about 960 feet. Drainage area.- 150 square railes. Records available.- April tc-September 1922, February 1932 to September 1938. Extremes.- Maximum discharge during year, 11,000 second-feet Feb. 11 (gage height, 17.0 feet), from rating curve extended above 3,000 second-feet on basis of velocity-area studies; no flow during October and parts of November, July, August, September. 1932-38: Maximum discharge, that of Feb. 11, 1938; no flow during several periods of each year. Remarks.- Records fair. No diversion above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0.8 7 485 830 102 46 3.7 3.4 0 0 2 .1 1.2 V.5 329 2,030 99 39 3.0 3.4 0 0 3 .1 1.2 6.5 1,670 2,120 96 38 3.4 3.4 0 0 4 .1 1.2 6 732 870 89 32 2.7 3.0 0 0 6 .1 1.6 5.5 312 465 89 28 3.0 2.4 0 0 6 .2 1.6 5 154 325 89 28 3.0 2.1 0 0 7 .2 1.6 5 99 320 70 26 3.7 3.0 .1 0 8 .2 2.0 4.9 75 998 73 21 5 3.0 .2 0 9 .2 2.4 4.7 315 604 68 19 6 2.7 .2 0 10 .2 4.2 4.7 881 395 60 21 8.5 2.1 .2 0 11 .5 1,400 4.7 7,190 405 60 22 7.5 1.8 .1 0 12 .8 553 4.4 1,730 2,590 58 19 4.0 1.4 0 0 13 .3 62 4.4 569 2,580 65 15 3.7 1.1 0 0 14 .5 34 .4.4 1,700 1,100 60 13 2.4 .7 0 0 16 .5 24 11 815 692 56 12 1.1 .7 .1 0 16 .5 19 9 536 550 48 15 .8 .6 .2 0 17 3.3 15 8 408 470 43 16 1.1 .6 .3 0 18 2.4 13 8 571 395 48 14 1.1 .4 .3 0 19 .8 12 10 476 330 53 14 2.4 .4 .3 0 20 .5 11 9.5 288 300 44 12 4.0 .4 .2 0 21 .5 11 8 241 274 38 12 3.7 .3 .1 0 22 .5 10 7 215 252 36 13 1.4 .3 .2 0 23 .5 10 6.5 197 227 36 12 1.1 .2 .2 0 24 .8 9 6.5 184 210 44 8.5 1.4 .3 .2 0 25 .5 8.5 6.5 172 198 56 9.5 1.1 .3 .1 0 26 .5 9 6.5 161 182 51 8.5 1.4 .3 0 0 27 .5 8.5 6 156 166 43 7.5 1.4 .2 0 0 28 .8 8 8 202 147 36 5 2.1 .2 0 .2 29 .8 8 10 136 51 5 4.0 .2 0 .2 30 .8 7.5 9 122 60 6 4.0 .1 0 .3 31 7 12 112 4.0 0 0 Second- Run-off In Month foot-days Maxljnun Minimum Mean acre-feet Dot 0 0 0 0 0 HOT 17.7 3.3 0 .59 35 Deo 2,257.3 1,400 .8 72.8 4,480 Calendar year 1937...... 36,006.6 4,090 0 98.4 71,420 Jan 216.2 12 4.4 6.97 429 Fob 20,863 7,190 75 745 41,380 Mar 20,395 2,590 112 658 40,450 Apr 1,821 102 36 60.7 3,610 May 641.0 46 4.0 17.5 1,070 Jun 91.7 8.5 .8 3.06 182 Jul 39.0 3.4 0 1.26 77 Aug 3.0 .3 0 .10 6.0 S«p .7 ,3 0 .02 1.4 water year 1937-3 46,245.6 7,190 0 127 91,720 Peak discharge.- Feb. 11 (10 11,000 seo.-ft.j Mar. (6 p.m.) 3,730 sec.-ft.; Mar. 2 (4 p.m.) 4,160 sec .-ft. SALINAS RIVER BASIN 145 Sallnas River near Spreckels, Calif. Location.- Water-stage recorder, lat. 36°37'50", long. 121°40'40", in El Toro grant, at bridge on Salinas-Monterey highway, half a mile upstream from Toro Creek, 2 miles west of Spreckels, and 4 miles south of Salinas, Monterey County. Altitude, about 50 feet. Drainage area.- 4,180 square miles. Records available.- January 1900 to August 1901, December 1929 to September 1938. Extremes.- Maximum discharge during year, about 75,000 second-feet Feb. 12 (gage height, 25.0 feet); minimum, 0.2 second-foot Oct. 1-6. 1929-38: Maximum discharge, that of Feb. 12, 1938; no flow at times during period 1929-35. Maximum stage known, 26.6 feet, Mar. 7, 1911, as indicated at oil pumping station opposite gage (discharge not determined). Remarks.- Records fair except those for period of missing gage heights, May 29 to September 30, which were computed on basis of seven discharge measurements and are poor. Small diversions for irrigation above station. Discharge, in second-feet, water year October 1937 to September 1938 Day oet. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.2 2.7 3.5 66 1,730 3,990 1,550 748 120 _ 2 .2 3.5 3.5 57 7,180 16 ,000 1,610 708 114 _ 3 .2 a, 5 3.5 52 6,700 34,300 1,470 660 108 _ 4 .2 2.7 3.5 44 16,600 23,300 1,400 600 102 - 6 .2 3.0 3.3 39 14 ,900 14 ,700 1,430 556 96 - 6 .2 2.8 3.5 37 8,520 11,500 1,480 528 88 *10 7 ,3 3.0 3.5 33 5,740 9,900 1,340 506 *80 « a .5 3.2 3.6 31 4,310 8,700 1,400 475 74 - *6 9 .6 3.3 3.8 28 3,700 8,700 1,310 450 68 10 .7 3.5 5.5 27 7,720 8,940 1,220 425 62 - 11 .8 3,5 6 24 44,800 6,840 1,160 376 58 _ *5 12 1.0 3.5 7,520 23 69,900 9,360 1,090 345 54 _ IS 1,1 3.5 8,500 22 31,500 27,400 1,060 325 50 _ 14 1.3 3.8 3,650 21 17,200 24,000 1,000 297 46 _ 16 1.6 3 8 1,960 21 20,700 13,600 924 293 42 - 16 1.9 3.8 1,290 20 11 ,900 9,900 868 289 38 _ 17 2,0 4.3 925 29 8,780 8,460 832 277 34 - ia 2.1 4.1 670 167 7,310 7,500 783 262 30 ., 19 2.2 3.8 508 246 7,100 6,620 727 251 26 _ 80 2.2 3,6 392 309 8,990 6,070 702 237 24 - 21 2.1 3,6 305 412 6,700 5,520 648 224 22 _ 22 S.I 3,5 252 635 5,500 4,700 612 218 *20 _ 23 2.1 3.5 230 602 4,620 4,100 584 212 19 _ 24 2.1 3.5 185 490 3,680 3,700 567 200 18 25 2.1 3.5 158 400 2,960 3,500 567 185 17 - 26 2.1 3.5 136 340 2,340 3,300 534 173 16 _ 27 s',52 2 3.3 120 301 1,760 2,850 512 162 15 - 28 3 3 104 272 1,480 2,520 512 158 14 _ 29 2.7 3^3 92 266 _ 2,140 572 145 13 *& SO 8,8 3.3 79 252 _ 1,930 748 135 12 - 31 S.8 - 72 340 - 1,800 128 - - Second- Run-off in Month foot -days ^foT^wvpn Minima Mean aore-feet 45.1 2.8 0,2 1.45 89 101.2 4.3 2.5 3.37 201 27,191.0 8,500 3.3 877 63,930 Calendar year 1937 ...... 336,707.3 22,100 .1 922 667,800 5,506 602 20 178 10,820 334,320 69,900 1,480 11,940 663,100 295,840 34,300 1,800 9,543 586,800 April...... 29 112 1,550 512 970 57,740 Jfy...... 10^548 748 JL*5O1 9ft 340 20,920 1,480 120 12 49.3 2,940 July...... 279 9 663 156 6 OvrW7 180 I I 6 S67 Water year 1937-3 704,757.3 69,900 .2 1,931 1,308,000 Peak dlaeharge.- Feb. 12 (6i30 a.m.) 75,000 sec.-ft.j Mar. S (10 a.m.) 42,800 sec.-ft.i Mar. 13 p.m.) 31,40O sec.-ft. ^Discharge measurement. 146 SAUNAS RIVER BASIN San Antonio River at Pleyto, Calif. Location.- Water-stage recorder, lat. 35°51'55", long. 120°59'30", in Pleyto grant, at highway bridge at old town site of Pleyto, Monterey County, 1.1 miles downstream from Copperhead Creek and 15 miles west of Bradley. Altitude, about 720 feet. Drainage area.- 282 square miles. Records available.- April to September 1922, December 1929 to September 1938. Extremes.- Maximum discharge during year, 10,700 second-feet Feb. 11 (gage height, 5.10 feet), from rating curve extended above 7,500 second-feet; no flow Oct. 1 to Dec. 9 and during part of Dec. 10. 1929-38: Maximum discharge, that of Feb. 11, 1938; no flow for several months each year. Remarks.- Records fair except those for period of missing gage heights, June 9 to Sept. 30," which were computed on basis of discharge measurements, precipitation records, and records for other streams in same basin and are poor. Small diversions for ir rigation above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 58 922 1,480 331 122 34 5 2 0 54 667 3,940 308 98 32 5 £ 0 50 3,130 3,180 299 106 30 4 4 0 47 1,830 1,860 282 100 29 4 5 0 43 1,040 1,470 286 95 28 4 6 0 43 778 1,260 268 90 28 «4 7 0 43 612 1,090 251 84 27 8 0 40 524 1,130 235 82 26 9 0 38 1,330 975 222 76 25 10 299 36 5,670 676 207 68 24 11 3,140 34 9,200 930 203 34 23 #0.2 12 1,660 33 3,740 3,320 199 62 22 13 639 30 1,980 3,410 192 60 21 14 429 30 4,650 2,020 188 60 20 16 326 36 2,200 1,580 184 59 19 16 243 40 1,460 1,280 188 59 18 17 204 45 1,110 1,110 184 57 17 18 194 117 1,170 966 180 51 16 19 187 117 1,290 876 170 50 15 f 2 20 147 156 920 798 159 53 14 21 130 136 824 715 148 53 13 22 128 112 749 668 138 53 12 23 128 99 678 622 129 51 11 24 125 89 585 608 122 48 10 25 114 81 515 564 116 44 9 26 109 72 475 509 119 43 8 27 96 66 455 464 122 38 7 28 85 87 585 435 116 37 6 29 78 96 406 126 35 6 30 72 114 _ 380 129 36 5 31 66 189 - 354 - 36 - Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet December...... 8,599 3,140 0 277 17,060 48,842.6 3,410 0 134 96,880 97 .370 April...... 5,801 331 116 190 11,501 May...... 1,972 122 35 63.6 3,910 " "* 6.0 _ .2 12 Water year 1937-? 107,611.2 9,200 0 295 213,500 Peak discharge.- Feb. 11 (7 a.m.) 10,700 see.-ft.,- Feb. 14 (8:15 a.m.) 6,920 sec.-ft.: Mar. 2 (4 p.m.) 6,380 sec.-ft. ' *Dlaobarge measurement. SALINAS RIVER BASIN 147 Arroyo Seco near Soledad, Calif. Location.- Water-stage recorder, lat. 36°16'05", long. 121°19'55", In Nwi sec. 21, T. 19 S., R. 6 E., half a mile downstream from Vaquero Creek and 11 miles south of Soledad. Altitude, about 370 feet. Drainage area.- 238 square miles. Records available.- November 1901 to September 1938. Average d 1 scharge.- 36 years (1902-38), 176 second-feet. Extremes.- Maximum discharge during year, 16,000 second-feet Feb. 11 (gage height, 16.5 feet), from'rating curve extended above 7,000 second-feet: minimum, 2.0 second-feet Oct. 2. 1901-38: Maximum discharge observed, about £2,000 second-feet Feb. 21, 1917 and Nov. 25, 1926 (gage height, 16.5 feet-}, from rating curve extended above 7,500 second- feet; no flow at times during several years. Remarks.- Records good. No large diversions above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. SOT. Doo. Jan. Feb. Mar. Apr, May June July A^. Sept. 1 2,2 3.3 12 67 2,710 1,930 478 212 S7 50 14 10 2 2.2 3.3 12 70 1,760 6,170 460 198 84 45 14 10 3 2.6 3,6 12 77 6,050 3,700 443 188 62 47 13 10 4 2.9 4,3 12 70 2,710 2,420 419 186 S2 46 13 10 6 3.6 4.3 13 67 1,760 1,800 496 179 79 44 13 10 6 4.0 4.6 13 65 1,310 1,510 416 173 76 40 13 10 7 4.0 5 13 63 1,010 1,430 385 168 74 39 13 10 8 3.6 5 13 62 830 1,430 368 166 74 36 13 10 9 3.6 5.5 17 60 3,020 1,290 352 164 74 35 13 10 10 3,3 5,5 1,380 59 9,320 1,130 339 16E 76 33 13 10 11 3,3 6 6,880 57 10,400 1,260 326 154 Y7 31 IB 10 12 2.9 10 1,470. 56 4,350 5,780 320 148 YY 30 12 10 IS 2.9 12 669 55 3,E70 ' 4,830 314 146 74 30 11 10 14 2.9 10 426 55 5,020 8,900 296 144 71 29 11 10 16 2,9 11 299 72 2,970 2,170 284 142 66 28 IE 10 16 4.0 12 233 75 2,120 1,840 B7E 142 62 B7 IB 10 17 4.6 11 190 137 1,710 1,610 260 140 69 26 12 10 18 4.6 16 166 142 B,120 1,370 255 136 68 25 IE 10 19 4.3 16 144 162 1,880 1,220 244 131 66 24 13 10 20 4,0 13 132 238 1,470 1,130 235 127 68 23 13 10 21 3,6 12 117 170 1,E60 1,010 226 123 58 E2 12 10 22 3,6 12 108 144 1,130 905 B15 119 56 20 IB 10 23 3.3 12 105 128 980 830 210 112 54 18 12 10 24 g.e IB 99 114 898 880 210 108 60 19 IE 10 25 3.3 12 91 105 820 780 210 106 47 19 IB 10 26 3.3 IE 86 97 Y48 712 E02 103 47 Bl 11 10 27 4.0 12 81 91 680 648 195 101 46 21 10 11 28 3,6 12 79 97 795 608 195 103 46 EO 10 IS 29 3,3 IB Y6 220 _ 570 241 101 ou*A 49 20 10 12 3.3 12 74 181 ,* 551 246 95 62 19 10 12 31 3.6 - 71 1,700 - 514 - 90 15 10 Second- Run-off in Month foot-days Maxi - Hlnlnum Mean ae re-feet 106,9 4.6 32 '32 3.45 212 280,4 16 9.35 556 13,093 6,S80 12 422 85,970 86,506,9 6,880 1,0 237 171,600 4,766 1,700 56 153 9^430 73,101 10,400 680 2,611 145,000 March...... 54,868 6 r170 514 1,Y70 108,800 April...... 9,111 496 195 304 18,070 4,36Y E12 90 141 8,660 1,960 8Y 46 65,0 July...... 902 50 15 89,1 1,790 373 14 10 1E.O 740 307 12 10 10.2 609 Water year 1937-38...... 163,215,3 10,400 2.2 447 383,700 Peakjiiseharge-- JDec, 11 (8 a.m.) 13,400 see,-ft,} Feb. S (5 a.m.) 11,200 see,-ft.; Feb. 11 (1 a.m.] 16,000 sec,-ft. 148 PAJARO RIVER BASIN Uvas Creek near Morgan Hill, Calif. Location.- Water-stage recorder and concrete control, lat. 37004'00", long. 121°41'30", in Las Uvas grant, 500 feet above Uvas Dam, 0.6 mile below Eastman Canyon, and 4.8 miles southwest of Morgan Kill, Santa Clara County. Altitude, about 390 feet. Drainage area.- 30.2 square miles. Records available.- December 1930 to September 1938. Extremes.- Maximum discharge during year, 8,630 second-feet Dec. 11 (gage height, 13.70 feet], from rating curve extended above 3,000 second-feet; minimum, 0.1 second-foot during parts of Oct. 1 and 2. 1930-38: Maximum discharge, that of Dec. 11, 1937; no flow at times during each year of period 1931-54. Remarks-- Records good. No regulation or large diversion above station. Water diverted at Uvas Dam, below gage, for supply of Gilroy. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.2 0.5 1.2 18 752 250 100 31 10 4.8 0.9 0.6 2 .2 .5 1.2 20 1,120 877 91 30 10 4.4 .8 .6 S .2 .5 1.2 18 942 337 85 28 10 4,4 .8 .6 4 .2 .5 1.2 17 800 237 120 26 9.5 4,2 .9 .5 6 ,2 .5 1.2 17 5O1 189 134 25 9.5 4,0 .9 ,5 6 ,2 .5 1.2 16 356 171 93 24 9 4.0 1.0 ,5 7 .2 .7 1.2 15 256 160 83 23 9 4.0 1.2 .5 8 .3 .6 1.4 15 196 152 75 22 9 3.8 1.2 .5 9 .3 .6 12 16 529 132 72 22 9 3.6 2,1 .6 10 .3 .7 2,390 14 1,090 121 71 21 9 3.4 3.1 .6 11 .3 2.0 3,950 14 1,710 127 65 20 9 3.1 1.4 .6 12 .3 2,0 438 14 845 619 69 20 9 3.9 1.2 .5 13 ,3 1,1 194 14 1,110 752 64 18 8.5 2.9 1.0 .5 14 ,4 1.9 121 14 1,050 359 58 17 8 Z.-9 .9 .5 16 ,4 2.2 93 14 534 262 64 17 7.5 2.7 .9 .5 16 ,4 1.4 74 14 366 324 52 17 7 2.7 1,0 ,5 17 .5 4.1 61 28 259 264 48 17 6.5 2.3 1.2 ,5 18 .5 2.4 52 21 340 213 46 16 6 2.3 1.2 .5 19 .5 1.5 46 47 248 184 43 15 6 2.0 1.2 .5 80 .4 1,2 40 37 203 194 40 16 6 1.8 1.2 .5 21 .4 4,9 37 27 175 158 38 14 6 1.4 1.0 .4 22 .4 2.6 33 24 154 142 36 14 6 1.4 1.0 .4 23 .4 1.9 31 21 136 450 35 13 5 1.3 1.0 .4 24 .4 1.7 29 19 121 444 35 12 4.8 1.7 .9 .4 85 .3 1.7 27 18 107 283 35 12 4.8 1.5 .9 .4 86 .4 1.5 25 17 96 216 34 12 4.8 1.7 .8 .3 27 .4 1.4 23 17 88 180 33 12 4.4 1.7 .8 .3 88 ,4 1.2 22 62 136 162 34 12 4,8 1.7 .8 .4 29 .4 1.2 21 66 140 34 11 5 1.4 .8 .3 30 .4 1.2 20 44 127 34 10 5 1,3 ,7 .3 31 .5 19 523 112 10 1.3 .7 Second- Mqy^-pn^ffi 114 n 1 ftmyB Run-off in Month foot-days Mean acre-feet Oet 10.7 0,5 0.2 0.35 21 HOT 44,7 4.9 .5 1.49 89 Dec 7,767.8 3,950 1.2 251 15,410 C 23,383.3 3,950 .2 64.1 46,380 Jan uary 1,220 623 14 39.4 3,420 Fell 14,210 1,710 88 508 38,190 Max 8,328 877 112 269 16,580 Apr 1,810 134 33 60.3 3,590 May 666 31 10 17.9 1,100 Jun 318.1 10 4.4 7.87 433 Jul 83.6 4.8 1.3 2.66 164 Aus 33.5 3.1 ,7 1.08 66 0ep 14.8 .6 .3 .47 28 1ater year 1937-^3 34,296.6 3,960 .2 94.0 68,030 feak discharge.- Deo, 10 (3 a.m.) 4,490 sec.-ft.; Dee, 11 (1 a.m.) 8,630 sec.-ft,] Feb. 13 (9 p.m.) 3,7oo seo.-ft. SAN LORENZO KIVER BASIN 149 San Lorenzo River at Big Trees, Calif. Location.- Water-stage recorder, lat. 37°01'40", long. 1E2°03'50", in Canada del RIncon grant, Santa Cruz County, half a mile south of village of Big Trees, 1.6 miles down stream from Zayante Creek, and 4 miles north of Santa Cruz. Altitude, about 150 feet. Drainage area.- 110 square miles. Records available.- April 1937 to September 1938. Extremes.- Maximum discharge during year, 12,000 second-feet Jan. 31 (gage height, 16.3 feet), from rating curve extended above 3,000 second-feet on basis of velocity-area and AVT studies; minimum, 12 second-feet Sept. 11. 1937-38: Maximum discharge, that of Jan. 31, 1938; minimum, 12 second-feet July 11, 1937, and Sept. 11, 1938. Remarks.- Records excellent except those for periods of missing or Incomplete gage-height record, which are fair. Many small diversions above station to supply water for domestic use. Diecharge. In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr, May June July Aug. Sept. 1 17 19 24 52 2,590 695 395 148 82 48 28 23 8 19 18 23 72 1,520 2,860 368 141 78 49 26 21 3 21 17 23 61 2,320 1,170 344 135 82 48 25 21 4 21 17 23 55 1,950 818 406 129 83 48 23 21 5 18 17 23 53 1,280 660 558 128 77 47 *23 26 6 16 17 23 52 1,100 626 380 122 67 46 *25 24 V 16 16 23 61 748 626 374 122 *67 45 *25 23 8 16 17 23 49 574 574 312 122 *67 42 *25 22 9 16 18 81 48 1,090 512 288 122 *67 40 *25 21 10 16 19 1,880 47 1,650 468 273 123 *67 38 *25 21 11 15 59 3,380 46 2,320 612 258 124 67 37 »25 20 12 15 38 688 46 1,550 1,580 245 124 64 37 *24 22 13 16 25 362 45 2,720 1,830 237 123 63 40 *25 20 14 21 45 213 45 2,970 1,100 225 119 61 34 27 21 16 26 32 152 49 1,350 818 213 119 60 35 27 19 16 22 26 124 51 *936 895 206 120 58 34 28 19 17 21 67 107 189 #800 782 199 113 55 35 27 20 18 21 39 94 99 *1,300 660 188 105 54 33 25 21 19 17 29 85 197 *1,200 590 184 105 52 33 26 20 SO 17 32 80 164 *850 625 174 105 52 31 26 20 SO. 16 47 74 113 *700 542 168 104 56 31 26 20 22 16 36 72 96 *600 497 161 95 55 32 26 20 23 16 33 71 87 *500 1,190 158 87 52 31 25 20 24 16 34 66 79 «450 1,500 161 88 51 33 25 20 25 17 30 64 74 «400 915 160 SB 49 31 25 20 26 17 28 62 71 *340 718 162 90 48 30 25 27 27 17 26 59 69 309 608 148 88 48 31 24 23 28 17 25 57 104 366 548 147 87 48 31 23 23 29 17 24 56 140 w 497 148 86 49 29 23 21 30 17 24 55 116 464 164 86 49 30 23 21 31 18 - 54 4,850 - 424 84 32 23 Second- Run-off In Month foot-days M^Trlimffli Minimum Mean ao re-feet 17.8 1,090 8,111 3,380 23 262 16,090 7,870 2 9YO 424 848 52,130 April...... 7,394 558 147 246 14,670 May...... 29 23 640 27 19 21.3 1,270 Water year 1937-3 92,771 4,860 15 254 184,000 Peak discharge.- Dec. 11 (3 a.m.) 6,590 sec.-ft.; Jan. 31 (3 p.m.) 12,000 sec.-ft.5 Feb. 14 (12ilO a.m.) 5,840 see,-ft. *0age-helght record missing or Incomplete; discharge computed on basis of records for Los Gates Creek at Los Qatos, 150 SAN FRANCISQUITO CREEK BASIN San Franclsqulto Creek at Stanford University, Calif. Location.- Water-stage recorder and concrete control, lat. 37°25'20", long. 122°11'25", in P.lnconada del Arroyo de San Franclsqulto grant, at golf course, three-quarters of a mile downstream from confluence with Los Trancos Creek and 1.2 miles west of Stanford Unvierslty post office, Santa Clara County. Altitude, about 120 feet. Drainage area.- 37.7 square miles. Records available.- January 1931 to September 1938. Extremes.- Maximum discharge during year, 1,330 second-feet Mar. 13 (gage height, 6.03 feet}; no flow Oct. 1 to Nov. 10. 1913-38: Maximum discharge, 2,620 second-feet Feb. 4, 1937 (gage height, 9.15 feet); practically no flow for several months of each year. Remarks.- Records good except those for periods of very low flow, which are fair. Frob- ably a very small discharge during October and November, due to return flow from Irri gation of golf course. Flow regulated by storage at Searsvllle Lake and diversion to Los Trancos and Lagunlta canals. Rating table, water year 1937-38 (gage height, in feet, and discharge, In second-feet) 0,0 0,0 1.0 22.2 2.0 117 3.0 306 5.5 1,130 .2 .3 1.2 35 2.2 147 3.5 440 6.0 1,330- .4 1.8 1.4 51 2.4 181 4.0 590 .6 5.6 1.6 70 2.6 219 4.5 754 .8 12,7 Disoharge, in second-feet, water year October 1937 bo September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0.6 0,3 392 131 59 19 0.3 0,1 0,1 0,1 2 0 .6 ,3 385 658 52 17 .3 .1 .1 .1 3 0 .6 .3 714 201 44 15 .3 .1 .1 .1 4 0 .6 .3 574 103 112 13 ,3 .2 .1 .2 5 0 .6 .3 299 77 167 11 .2 .2 .1 .2 6 0 .6 .3 203 103 91 7 .2 .2 ,1 .2 7. 0 .6 .4 116 102 75 3.2 .2 .2 .1 .1 8 0 .6 .4 94 77 35 1.7 .2 ,2 .1 .2 9 0 .7 .3 138 74 41 2.0 .2 .2 .1 .2 ^o 0 147 .3 469 66 45 2.0 .2 .2 .1 .2 11 .1 588 .3 864 79 43 .6 .2 .2 .1 .2 12 .1 136 .3 432 362 41 .6 .2 ,2 .1 .2 13 .1 19 .3 560 638 41 .6 .2 .2 .1 .2 14 .2 2.7 .3 558 217 34 1.0 .2 .2 .1 .2 16 .2 .7 .4 239 128 24 4.2 .2 .2 .1 ,2 16 .2 .3 .4 170 225 17 5.5 .1 .2 .1 .2 17 .3 .3 3.8 104 183 22 3.0 .1 .2 .1 .2 18 .5 .3 .4 181 136 21 .4 .1 .2 .1 .2 19 .2 .2 107 147 127 19 .3 .1 .2 .1 .2 20 .4 .2 34 82 304 13 .3 .2 .2 .1 .2 21 .3 .2 4.3 81 170 12 .3 .2 ,1 .1 .2 28 .2 .2 .3 78 123 10 .3 .1 .1 .2 .2 23 .6 .3 .3 59 562 10 .3 .1 .1 .2 .2 24 .6 .3 .2 47 443 17 .3 .1 .1 .2 .2 25 .6 .2 .2 37 215 15 .3 .1 .1 .2 .2 26 .6 .2 .2 29 152 10 .3 .1 .1 .2 .2 27 .6 .2 .2 40 120 11 .3 .1 .1 .2 .2 28 .6 .2 6.5 66 104 12 ,3 .1 .2 .1 .2 29 .6 31 81 14 .3 .1 .1 .1 .2 30 ,6 .3 13 77 22 .3 .1 .1 .1 .2 31 .3 544 70 .3 .1 .1 Second- Run-off in ' Month foot -day a Maxi^ HinH-u* Mean acre-feet Oct 0 0 0 0 0 Not 7.5 .6 0 .25 15 Dee 902.9 588 .2 29.1 1,790 c 10,100.2 1,170 0 27.7 20,040 Jan uary 760.6 544 .2 24.2 1,490 Pet 7,158 864 29 256 14,200 Mai 6,108 658 66 197 12,120 Api 1,129 167 10 37,6 2,240 Ma, 110,7 19 .3 3.57 220 Jim 5,1 .3 .1 .17 10 JiU 4.9 .2 .1 .16 9,7 3,7 .2 .1 .12 7.3 Sej^ 5,6 .2 .1 .19 11 Iater year 1937-3 a - 16,186,0 864 0 44,3 32,110 Peak discharge.- Feb. 11 (11(30 a.m.) 1,330 see. -ft.; Mar. 2 (s a.m.) 1,330 see, -ft.j Mar. 13 ( 2 a.m.) 1,330 see . -ft . SAN FRANCISQUITO CREEK BA.SIN 151 San Franclsquito Creek at Palo Alto, Calif. Location.- Water-stage recorder and concrete control, lat. 37°27'10", long. 122°08'20", In Rancho de las Pulgas grant, 175 feet upstream from Newell Avenue bridge, in Palo Alto, Santa Clara County, and about 2 miles upstream from mouth. Altitude, about 5 feet. Drainage area.- 38.6 square miles. Records available.- January 1931 to September 1938. Extremes.- Maximum discharge during year, 1,400 second-feet Feb. 11 (gage height, 11.46 feet;; no flow for several months. 1931-38: Maximum discharge, 2,550 second-feet Feb. 4, 1937 (gage height, 16.05 feet); no flow for several months of each year. Remarks.- Records good except those for parts of Jan. 31 and Feb. 1, which were computed on basis of records for station at Stanford University and are fair. Flow regulated by storage at Searsvllle Lake and diversion to Los Trancos and Lagunlta canals. Rating table, water year 1937*38 (gage height, in feet, and discharge, in seoond-feet) 0.0 0.0 0.8 4.5 1.8 3.6 141 6,0 396 .1 ,1 1.0 6,9 2.0 4.0 178 7.0 528 ,2 .4 1.2 10.2 2.4 4,5 228 8.0 686 .4 1.3 1,4 14.5 2.8 5.0 282 9,0 868 Discharge, In second-feet, water year October 1937 to September Day Oct. HOT. Deo. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0 418 132 54 15 2 0 0 328 648 50 12 3 0 0 750 203 38 10 4 0 0 621 106 93 8.5 6 0 0 304 70 171 7 S 0 0 213 96 83 4.5 7 0 0 116 96 70 .3 8 0 0 92 74 31 0 9 0 0 124 65 36 0 10 116 0 432 60 39 0 11 544 0 883 69 38 0 12 156 0 444 314 35 0 13 21 0 477 657 36 0 14 1.9 0 639 223 32 0 16 .2 0 249 128 22 0 16 0 0 168 210 13 1.1 17 0 0 110 178 18 1.5 18 0 0 164 128 16 0 19 0 99 150 120 15 0 20 0 40 82 292 8 0 21 0 5 76 168 7.5 0 22 0 .1 74 120 6 0 23 0 0 56 456 5.5 0 24 0 0 43 520 12 0 25 0 0 35 213 10 0 26 0 0 23 146 7 0 27 0 0 33 116 5.5 0 28 0 .3 52 96 7 0 29 0 27 75 9.5 0 30 0 13 _ 69 17 0 31 0 510 - 63 - 0 Seoond- Run-off in Month foot-days Maxlmm Minimum Mean acre-feet 0 0 0 0 0 0 0 0 0 0 839.1 544 0 27.1 1,660 9,564.3 1,150 0 26.2 18,960 694,4 510 0 22.4 1,380 February...... ««.* .. 7,156 883 23 256 14,190 5,911 657 60 191 11,720 April...... 985.0 171 5.5 32.8 1,950 May...... 69.9 15 0 1.93 119 0 0 0 0 0 July...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Water year 1937-!18...... 15,645.4 883 0 42.9 31,020 Peak discharge.-. Feb. 11 (1 p.m.) 1,400 sec.-ft.j Har, 13 (4 p.m.) 1,350 sec.-ft,} Mar. 23 (11:30 p.m.) 1,280 sec.-ft. SAN FRANCISOUITO CREEK BASIN Los Trances Creek at Stanrord University, Calif. Location.- Water-stage recorder and concrete control, lat. 37°£;4'35", long. 182 11'35", n El Corte de Madera grant, about feet upstream from mouth and 1.6 miles southwest of Stanford University post office. Santa Clara County. Altitude, about Drainage area.- 7.5 square miles. Records available.- January 1931 to September 1938. Extremes.- Maximum discharge during year, 385 second-feet Feb. 13 (gage height, 3.10 no flow for several months. 1951-38: rJaximum discharge. 399 second-feet Mr. 81, 1937 (gage height, 3.13 feet); no flow for several months Remarks.- Records good. Water diverted to Los Trances canal, above station, a small part of which is returned to creek above station through Felt Lake spillway. Rating table, water ye^r 1937-38, (gage height, in feet and discharge, in seoond-feet) 0.0 0 4.6 1.4 42 .1 .05 6.3 1.6 .2 .5 8.4 1.8 1.1 .9 11.5 2.0 2.0 1.0 16 2.2 3,2 1.2 27 Discharge, in seoond-feet, water year October 1937 to September 1938 Day pot. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0 37 29 11 3.5 0.2 0.1 2 0 0 54 134 10 3.8 .2 .1 3 0 0 61 32 10 3.5 .2 .1 4 0 0 110 21 16 3.1 .2 .1 6 0 0 47 16 19 3.0 .2 .1 6 0 0 30 16 12 2.8 .2 .1 7 0 0 18 14 11 2.7 .2 .1 8 0 0 14 13 10 2.6 .2 .1 9 0 0 25 12 9.5 2.5 .2 .1 10 2.2 0 61 11 9.5 1.6 .2 .1 11 37 0 152 12 8.5 .5 .2 .1 12 3.8 0 68 59 8.5 .4 .2 ,1 13 .7 0 138 105 8 .4 .1 .1 14 .3 0 112 32 5.5 .4 .1 .1 16 .1 0 42 23 .8 .4 .1 .1 16 .1 .1 29 32 1.8 .3 .1 .1 17 0 .1 92 25 4.3 .3 .1 0 18 0 .1 26 20 4.6 .3 .1 0 19 0 5 20 18 4.5 .3 .1 0 20 0 .6 16 28 4.2 .3 .1 0 21 0 .3 14 19 3.8 .3 .1 0 22 0 .2 12 16 3.0 .4 .1 0 23 0 .2 11 43 2.8 .3 .1 0 24 0 ,1 10 45 3.1 .2 .3 0 25 0 .1 9.5 25 3.3 .2 .1 0 26 0 .1 8.5 20 2.8 .2 .1 0 27 0 .1 8 17 2.4 .2 .1 0 28 0 .7 15 16 2.6 .2 .3 0 29 0 1.6 14 2.8 .2 .3 0 30 0 .4 _ 13 3.9 .2 .3 0 31 0 109 - 12 - .2 0 Seoond- Run-off In Month foot-days Maximum Minimum Mean acre-feet October...... 0 0 0 0 0 November ...... 0 0 0 0 0 44.2 37 0 1.43 88 Calendar year 1937...... 1,243.2 319 0 3,41 2.470 118.7 109 0 3.83 235 1,170.0 152 8 41.8 2,320 892 134 11 28.8 1,770 April...... 199.2 19 .8 6.64 395 May...... 35.3 3.8 .2 1.14 70 4.2 .2 .1 .14 8.3 July...... 1.6 .1 0 .05 3.2 0 0 0 0 0 0 0 0 0 0 Water year 1937-S 2,465.2 152 0 6.75 4,890 Peak discharge.- Feb. 11 (10:30 A.m.) 276 sec.-ft.; Feb. 13 (10:45 p.m.) 385 sec.-ft.; Mar. 2 (1 a.m.) 308 aeo.-ft. SAN FRANCISQUITO CREEK BASIN 153 Los Trancos canal near Stanford University, Calif. Location.- Water-stage recorder and concrete control, lat. 37°23'20", long. 122°11'10", in El Corte de Hadera grant, half a mile downstream from intake, and 3 miles south west of Stanford University post office, Santa Clara County. During periods of low flow recorder is moved to Cippoletti weir at canal intake. Altitude, about 360 feet. Records available.- October 1951 to September 1933. Extremes.- Maximum daily discharge during year, 35 second-feet Dec. 11; no flow at times. 1931-38: Maximum daily discharge, 40 second-feet Feb. 13, 1936; no flow at times dur ing each year. Remarks.- Records excellent. Discharge Oct. 1 to Nov. 17 and Apr. 14 to Sept. 30 com puted by formula for flow over Cippoletti weir. Canal diverts water from Los Trancos Creek 2 miles above mouth and conveys it to Felt Lake, an irrigation reservoir on Stanford University campus. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.3 0.2 0 1 0.6 2.5 0 3.4 1.3 0.6 0.3 0.3 2 .4 .1 .7 33 0 1.3 1.3 .6 .3 .3 3 .3 .1 .6 #16 0 0 1.3 .6 .3 .3 4 .3 .1 .6 0 0 0 1.3 .6 .3 .3 5 .2 .1 .5 0 0 0 1.3 .6 .4 .3 6 .2 .1 .5 0 0 0 1.2 .6 .4 .3 7 .2 .2 .5 0 0 0 1.2 .6 .4 .3 8 .2 .2 .5 0 0 0 1.1 .6 .4 .3 9 .2 .2 2 .5 0 0 0 1.1 .5 .4 .3 10 .2 .2 14 .5 0 0 1.7 1.1 .5 .4 .3 11 .2 .3 35 .5 0 0 2.6 1.1 .5 .4 .3 12 .2 .2 14 .5 0 0 2.6 1.1 .5 .3 .3 13 .2 .2 4.1 .5 0 0 2.6 1.0 .5 .3 .3 14 .2 .2 2.2 .5 0 2.5 2.6 1.0 .5 .3 .3 15 .2 .1 1.7 .5 0 6.5 2.6 1.0 .5 .3 .3 16 .2 .1 1.4 .6 0 6.5 2.5 .9 .5 .3 .3 17 .1 .1 1.2 1.4 0 6 2.4 .8 .5 .3 .3 1C .1 0 1.1 1.3 0 6 2.3 .8 .5 .3 .3 19 .1 0 1.0 11 0 6 2.2 .8 .5 .3 .2 20 .1 0 .9 4.5 0 5.5 2.1 .8 .4 .3 .2 21 .1 0 .8 2.5 0 5.5 2.0 .8 .4 .3 ,2 22 .1 0 .8 1.9 0 5 1.9 .8 .4 .3 .2 23 .1 0 .8 1.7 0 5 1.9 .7 .4 .3 .2 24 .1 0 .7 1.4 0 5 1.8 .7 .4 .3 .2 25 .1 0 .7 1,3 0 4.4 1.7 .7 .4 .3 .2 26 .2 .1 .7 1.2 0 3.6 1.7 .7 .4 .3 .2 27 .1 ,1 .7 1.1 0 3.7 1.7 .6 .4 .3 .2 28 .1 .1 .6 3.9 0 3.8 1.6 .6 .4 .3 .2 29 .1 .1 .6 9 0 3.7 1.5 .6 .4 .3 ,1 30 .1 .1 .6 3.7 0 3.9 1.4 .6 .3 .3 0 31 .1 .6 31 0 1.4 .3 .3 Second- Run-off in Month foot-days Maximum Minimum Mean acre-feet Dot 5.3 0.4 0.1 0.17 11 Koi 3.2 .3 0 .11 6.3 Dec ember...... 85.2 35 .1 2.75 169 C 514.8 35 0 1.41 1,020 Jan uary 85.5 31 .5 2.76 170 Pet 51.5 33 0 1.84 102 Mar 0 0 0 0 0 Apr 82.6 6 5 0 2.75 164 May 49.5 3 4 0 1.60 98 Juo 28.3 1 3 .6 .94 56 Jul 14.9 6 .3 .48 30 Au< 10.0 4 .3 .32 20 Sep 7.5 3 0 .25 15 1ater year 1937-3 423.5 35 0 1.16 841 *Canal closed at noonj discharge interpolated. 160262 O 39 11 154 SAN FRANCISQUITO CREEK BASIN Lagunita canal at Stanford University, Calif. Location.- Water-stage recorder, lat. 37°25'05", long. 122°11'15", in Rinconada del Arroyo de San Francisquito grant, 500 feet downstream from intake, at Stanford University, Santa Clara County. Altitude, about 150 feet. Extremes.- Maximum daily discharge during year, 16 gecond-feet Jan. 20, 29; no flow for several months. 1931-38: Maximum daily discharge, 23 second-feet Feb. 13, 1956; no flow for sever al months of each year. Remarks.- Reftords excellent except those for period of very low flow, July 10-21, which were interpolated and are fair. Canal diverts water from San Francisquito Creek below its confluence with Los Trancos Creek to supply the Lagunita, an irrigation reservoir on Stanford University campus. Discharge, In second-feet, water year October 1937 to September 1938 Day Oot. HOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 0 0.2 2,3 0.3 4.1 4.5 4.3 1.4 0,6 2 0 .3 2.4 .3 .9 3.3 4.5 1.5 .5 3 0 .3 2.6 .3 0 2,5 4.8 1.3 .7 4 0 .2 2,6 .3 0 2.9 4.8 1.0 .7 5 0 .2 2.7 0 0 2.4 4.8 1.1 .6 6 0 .2 2,6 0 0 2.2 4.7 .9 .4 7 0 .3 2,3 0 0 2.1 4.7 .9 .3 8 0 .3 2,2 0 0 1.9 4.7 .9 .3 9 0 .4 2,2 0 0 3.7 4.5 .8 .3 10 0 4.3 2,2 4.0 4.5 5.5 4.9 .8 .3 11 0 5.5 2,2 2.7 6 5.5 4.8 .8 .3 18 0 5.5 2,0 0 2.Y 3.9 4.5 .9 .3 13 0 6,5 1.9 ,1 0 .6 4.7 .9 .3 14 0 8.5 1.9 0 0 2,0 5 .7 .3 15 0 8 2.7 0 0 4.1 4.9 .6 .2 16 0 7 3.0 0 0 3.8 5.5 .6 .2 17 0 6 9 0 0 4.0 5.5 .7 .1 18 0 5.5 9 0 0 4.4 2.8 .4 .1 19 .5 4.3 14 0 0 4.Y 2.2 .6 0 SO .5 3.9 16 0 0 4.7 2.2 .6 0 21 .4 3.7 13 0 4.3 4.7 2.2 .4 0 22 .3 4.4 7 0 7 4.7 2.1 .3 0 23 .4 5 6.5 8 6.5 4.7 1.9 .3 0 24 ,4 3.7 5.5 12 0 4.8 2.2 .2 0 25 .3 3.3 5 10 0 4.4 1.9 .2 0 86 .3 3.1 4.8 6 3.0 4,1 1,5 .3 0 87 .2 2.8 4.5 4.5 5.5 4.1 1.5 .4 0 88 .2 2.7 10 4,8 5 4.2 2.1 .3 0 29 .5 2.5 16 4,8 4.3 2.2 .2 0 30 .2 2,4 15 4.8 4.4 1.3 .6 0 31 2.4 10 4.7 1.7 0 Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet Oot 0 0 0 0 0 Nov 4.2 .5 0 .14 8.3 December...... 103.4 8.5 .2 3.34 205 C 673.6 19 0 1.85 1,340 Jan 183.1 16 1.9 5.91 363 Pet 53.3 12 0 1.90 106 Kar 63.8 7 0 2.06 127 Apr 11...... 113.1 5.5 .6 3.77 224 Bay 110,0 5.5 1.5 3.55 218 Jun 20.6 1.5 .2 .69 41 Jul 6.5 .7 0 .21 13 Aug 0 0 0 0 0 Sep 0 0 0 0 0 »ater year 1957-3B...... 658.0 16 0 1.80 1,310 STEVENS CREEK BASIN 155 Stevens Creek near Cupertino, Calif. Location.- Water-stage recorder and concrete control, lat. 37°18'20", long. 122°04'25", In SWi sec. 22, T. 7 5., R. 2 W., at county highway bridge, a quarter of a mile below Stevens Creek Dam, and about 4 miles west of Cupertino. Altitude, about 385 feet. Drainage area.- 18.1 square miles. Records available.- January 1930 to September 1938. Extremes.- Maximum discharge during year, 562 second-feet Feb. 13 (gage height, 4.66 feet), from rating curve extended above 410 second-feet; minimum, 0.2 second-foot Oct. 7-12 (gage height, 1.20 feet). 1930-38: Maximum discharge, 709 second-feet Dec. 27, 1931 (gage height, 4.57 feet), from rating curve extended above 670 second-feet; no flow at times in each year except 1938. Remarks.- Records good. Flow regulated by storage in Stevens Creek Reservoir, which be gan in 1936J water released during summer. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Deo. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0,3 0.5 1.4 4.9 17 93 55 23 35 24 12 11 2 .3 .5 1.6 7 26 257 51 22 36 24 12 11 s .3 .5 1.7 9.5 17 162 51 22 35 23 12 11 4 .3 .5 1.7 Y 14 lie 53 22 35 23 12 5.5 5 .3 .5 1.7 5.5 101 100 71 22 35 23 12 2.1 6 .3 .5 1.7 4.6 185 89 53 21 35 14 12 1.9 1 .3 .5 1.1 4.4 111 84 50 18 36 6.5 12 1.9 3 .3 .5 .4 4.4 84 78 49 14 37 4.3 12 1.9 9 .3 .5 1.1 4.6 105 72 49 18 35 3.8 12 1.9 10 .3 .5 17 4.6 209 67 49 23 35 3.S 12 2.1 11 .3 .7 24 4.4 350 67 39 26 35 3.8 12 1.9 12 .3 1.4 22 4.1 227 172 28 27 36 3.8 12 .7 13 .3 1.8 18 4.1 319 263 25 27 34 3.4 12 .6 14 .3 1.8 21 4.1 362 160 30 31 34 2.7 12 .6 15 .3 1.8 21 4.1 195 121 33 30 29 2.7 12 .7 16 .3 1.8 22 4.6 152 126 33 31 29 3.1 12 .7 17 .3 2.0 20 6 127 112 32 31 29 3.4 12 .7 IS ,3 2.2 25 8 121 96 31 31 29 2.9 12 .7 19 .3 2.2 23 11 111 91 30 32 29 10 12 .7 20 .3 2.2 24 14 94 110 29 33 29 17 12 .7 21 .3 2.2 14 14 84 94 28 33 29 22 12 .7 22 .3 2.2 12 12 79 84 27 29 31 24 11 .7 23 .3 2.2 9.5 9,5 72 121 26 33 31 15 11 .7 24 .4 2.2 S.5 9 65 171 26 33 31 12 11 .7 25 .4 2.2 8,5 8.5 60 116 26 36 30 12 11 .7 26 .5 2.0 8.5 Y.5 56 96 25 38 30 12 11 .7 27 .5 2.0 8.5 7 46 85 25 40 25 12 11 .7 28 .5 2.0 8.5 9.5 60 76 22 37 25 12 11 .7 28 .5 2.0 7 20 _ 71 22 33 25 12 11 .7 50 .5 1.7 4.6 26 * 65 22 35 24 12 11 .7 31 .5 - 4.6 28 - 62 - 36 - 12 11 Seoond- Run-off In Month foot-days Maximum Minlsrum Mean acre-feet October...... 10.7 0.5 0.3 0.35 21 43.6 2.2 .5 1.45 86 December...... 343.6 25 .4 11,1 682 5,253.0 100 .2 14,4 10,420 271 9 28 4.1 8«7Y 539 3,449* 362 14 123 6,840 March...... 3,481 263 62 112 6,900 April...... 1,091 71 22 36.4 2,160 Hay...... 887 40 14 28.6 1,760 948 3Y 24 31.6 1,880 July...... 359.2 24 11*2 7 11.6 712 362 12 11.7 718 65.3 11 .6 2.18 130 Water year 1S37-;...... 11,312.3 362 .3 31.0 22,430 Peak discharge.- Feb. 5 (8 p.m.) 328 sec.-ft.; Feb. 11 (11:30 a.m.) 438 sec.-ft.; Feb. 13 (e p.m.) >2 sec.-ft. 156 GUADALUPE CREEK BASIN Guadalupe Creek at Guadalupe, Calif. Location.- Water-stage recorder and concrete control, lat. 37°13'05", long. 121°54'35", In SWi sec. 19, T. 8 S., R. 1 E., half a mile northwest of Guadalupe and 3.5 miles upstream from confluence with Alamitos Creek. Altitude, about 325 feet. Drainage area.- 12.6 square miles. Records available.- January 1930 to September 1938. Extremes.- Maximum discharge during year, 1,150 second-feet Feb. 10 (gage height, 3.95 feet); minimum, 0.1 second-foot Oct. 7. 1930-38: Maximum discharge, 1,160 second-feet Dec. 28, 1931 (gage height, 4.05 feet), from rating curve extended above 840 second-feet; no flow during part of each year except 1937 and 1938. Remarks.- Records good except those for periods of shifting control, Oct. 1 to Dec. 9, July 24-27, Aug. 3-10, which are fair. Small diversions above station. Flow regu lated by storage in Guadalupe Reservoir, which began in 1936; water released during summer. Discharge, In second-feet, water year October 1937 to September 1938 Day Got. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.2 0.6 0.6 4.5 162 65 34 14 18 16 16 15 2 .3 .5 .6 5 154 224 28 14 19 16 15 15 S .4 .5 .6 5 242 129 30 14 20 16 16 15 4 .3 .4 .6 5.5 350 88 33 16 19 15 16 15 5 .3 .5 .7 5.5 204 66 38 15 19 16 16 14 6 .2 .5 .6 5.5 170 61 30 15 19 16 16 14 7 .2 .5 .6 5.5 126 55 27 15 19 18 16 15 8 1.2 .5 .6 5.5 90 50 25 14 20 14 17 16 9 .3 .5 1.7 5.5 130 44 24 14 19 3.3 16 9.5 10 .2 .6 117 5 521 41 23 14 17 3.1 16 2.7 11 .2 3.7 248 5 693 43 22 14 17 3.6 16 2.7 12 .2 1.3 49 5.5 286 169 23 14 17 3.8 15 2.7 IS .4 .9 22 5.5 421 246 22 14 17 3.6 14 2.7 14 .6 1.2 15 5.5 452 154 20 14 15 3.6 14 2.7 16 .7 1.0 11 5.5 204 104 19 14 13 3.6 14 2.5 16 .5 .8 8 5.5 140 106 18 15 «J6 3.6 14 2.7 17 .4 .8 6.5 5.5 92 97 17 17 is 4.1 14 2.7 18 .5 1.7 5.5 5.5 131 78 16 18 18 5.5 14 2.7 19 .4 1.0 4.8 11 94 69 16 18 18 18 14 2.7 20 .3 .9 5 7.5 34 67 16 19 17 36 14 2,5 21 .3 1.7 5.5 6.5 35 57 16 17 16 35 14 2.5 22 .4 1.3 5.5 6 22 51 14 16 15 26 14 .7 23 .4 1.1 5.5 6 28 61 14 20 14 17 14 .5 24 .4 1.1 5.5 6.5 40 120 14 21 15 17 14 .4 25 .4 .9 5 6.5 37 87 14 21 15 17 14 .4 26 .4 .8 5 6 32 69 13 21 15 17 16 .4 27 .4 .7 4.8 6 29 58 13 20 14 16 16 .5 28 .4 .8 4.8 13 44 52 15 19 14 16 15 .4 29 .5 .7 4.5 15 45 15 18 15 16 15 1.1 SO .5 .7 4.5 11 38 15 18 16 16 15 1.7 31 .7 4.5 137 36 18 16 15 Second- Run-off in Month foot-clays Maximum Minimum Mean acre-feet Oct 12.6 1.2 0.2 0.41 25 Hoi 28.2 3.7 .4 .94 56 Dec 553.5 248 .6 17.9 1,100 0 alendar year 193 5,497.8 248 .2 15.1 10,910 Jan 334.0 137 4.5 10.8 662 Pet 4,963 693 22 177 9,840 Mai 2,630 246 36 84.8 5,220 Apr 624 38 13 20.8 1,240 Ma, 511 21 14 16,5 1,010 JUD 504 20 13 16.8 1,000 Jul 427.8 36 3.1 13.8 849 Aug 46S 17 14 15.0 922 Se] 166.4 16 .4 5.55 330 1 ater year 1937-3 11,219.5 693 .2 30.7 22,250 Peak discharge. - Deo. 11 (1 a.m.) 826 sec. -ft.} Feb. 10 (9 p.m.) 1,150 see, -ft.} Feb. 13 (11 p.m. 910 sec. -ft. GUADALUPE CREEK BASIN 157 Guadalupe Creek at San Jose, Calif. Location.- Water-stage recorder and concrete control, lat. 37°20'00", long. 121°54'00", 100 feet downstream from confluence with Los Gatos Creek, in city of San Jose, Santa Clara County. Altitude, about 80 feet. Drainage area.- 131 square miles. Records available.- January 1930 to September 1938. Extremes.- Maximum discharge during year, 6,660 second-feet Dec. 11 (gage height, 9.80 fSet), from rating curve extended above 3,500 second-feet by velocity-area studies; no flow during part of the year. 1930-38: Maximum discharge, 6,700 second-feet Dec. 27, 1931 (gage height, 11.12 feet, affected by backwater from bridge construction), from rating curve extended above 3,200 second-feet; no flow during most of each year. Remarks.- Records excellent. Small diversion above station, Flow regulated by storage in several reservoirs ,which began in 1936. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0 1,850 455 46 6 2 0 0 1,340 1,880 83 2,6 s 0 0 2,290 926 111 1.0 4 0 0 2,210 612 117 .5 S 0 0 1,350 441 231 0 6 0 0 1,100 349 141 0 7 0 0 628 293 111 0 8 0 0 420 244 98 0 9 0 0 726 172 81 0 10 385 0 2,240 129 69 0 11 3,940 0 3,730 129 56 0 12 887 0 1,820 1,060 48 0 IS 218 0 2,100 1,560 51 0 14 62 0 3,030 934 41 0 16 6 0 1,390 642 Si 0 16 .1 0 878 642 27 0 17 0 0 635 582 23 0 18 0 0 598 455 23 0 19 0 0 483 368 19 0 20 0 0 304 349 17 0 21 0 0 244 315 14 0 22 0 0 176 280 11 0 23 0 0 148 293 7.5 0 24 0 0 123 774 6.5 0 25 0 0 96 511 6 0 25 0 0 123 381 3.0 0 27 0 0 96 326 2.5 0 28 0 0 112 304 3.0 0 29 0 0 248 6.5 0 SO 0 0 _ 206 7 0 31 0 1,460 - 152 0 Second- Month MmrtunTM Run-off In foot-days Minimum Mean acre-feet October...... 0 0 0 0 0 0 0 0 0 0 5,498.1 3,940 0 177 10,910 16,593.3 3,940 0 45.5 32,920 1,460 1,460 0 47.1 2,900 30,240 3,730 96 1,080 59,980 16,012 1,880 129 517 31,780 April...... 1,491.0 221 2.5 49.7 2,960 May...... 10.1 6 0 .33 20 0 0 0 0 0 July...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Water year 1937-2 8...... 54,711.2 3,940 0 150 108,500 Peak discharge.- Dec. 11 (4 a.m.) 6,660 sec.-ft.; Feb. 11 (4i30 a.m.) 4,480 sec.-ft.} Feb. 14 (2 a.mj 4,»50 seo.-ft. 158 GUADALUPE CREEK BASIN Alamltos Creek near Edenvale, Calif. Location.- Water-stage recorder, lat. 37°14'20", long. 121°52'15", in SWf sec. 16, T. 8 S., R. IE., 0.4 mile upstream from confluence with Guadalupe Creek and 4 miles southwest of Edenvale. Altitude, about 200 feet. Drainage area.- 35.0 square miles. Records available.- January 1930 to September 1938. Extremes.- Maximum discharge during year, 2,280 second-feet Dec. 11 (gage height, 6.35 feet) , from rating curve extended above 1,800 second-feet; no flow for several months. 1930-38: Maximum discharge, 2,670 second-feet Dec. 27, 1931 (gage height, 6.60 feet), from rating curve extended above 1,800 second-feet; no flow for several months each year. Remarks.- Records good. Small diversions above station. Flow regulated by storage in Calero and Almaden Reservoirs, which began in 1936; water released during summer. Discharge, In second-feet, water year October 1937 to September 1938 DaT Oct. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 24 195 202 63 24 21 26 27 23 2 0 15 341 816 58 22 16 25 28 23 3 0 14 556 425 56 20 29 27 30 23 4 0 12 703 262 57 19 25 24 30 22 5 0 10 286 172 71 19 28 24 30 22 6 0 4.8 193 142 56 22 26 24 29 22 7 0 15 119 127 52 26 26 25 23 22 8 0 9 80 118 48 20 24 20 22 22 9 0 6.5 297 102 46 20 23 10 30 21 10 28 8.5 970 9V 45 23 22 8 30 21 11 1,340 7.5 1,380 104 43 22 24 7 24 21 12 307 7 500 515 43 20 23 6,5 24 21 13 100 7 747 581 43 20 24 6 24 20 14 51 7 749 333 38 20 27 4.9 25 20 15 27 7 351 216 36 21 24 4.3 25 20 16 29 7 231 248 34 20 20 3.8 24 20 17 32 7.5 166 200 33 20 28 3.2 25 20 18 39 7.5 143 161 32 20 26 2.6 24 17 19 34 17 113 140 30 23 27 2.2 24 14 20 36 21 91 131 30 21 26 21 24 4.3 21 39 15 75 115 28 22 20 42 24 2,8 22 36 12 58 97 26 21 24 43 24 2.4 23 31 11 49 109 25 10 24 42 24 1.9 24 35 10 30 207 26 12 26 40 24 1.4 25 34 11 45 154 25 16 28 44 23 1.1 26 33 10 89 118 24 17 30 44 22 .7 27 38 11 78 104 22 20 26 36 18 .6 28 37 16 117 94 24 19 23 43 18 .4 29 32 32 _ 84 24 16 25 40 18 .2 30 22 15 _ 76 24 17 27 24 20 .1 31 31 358 - 68 23 23 23 Seoond- llmrfimmi Run-off In Month foot-days Minimum He an acre-feet October...... 0 0 0 0 0 0 0 0 0 0 2,391 1,340 0 77.1 4,740 10,814.7 1,340 0 29.6 21,450 715.3 358 4.8 &o*±n<* -t 1,420 8^Y52 1,380 30 313 17,360 6^318 816 68 204 12,530 April ...... 1 >162 71 22 38.7 2,300 May...... OJ.DAl ^ <&Ooa 10 1,220 742 30 16 24^7 1,470 JulT...... 695.5 44 22 22.4 1,380 Auglist...... 760 30 18 24.5 1,510 Sep 409.9 23 .1 13.7 813 Water year 1937-3 22,560.7 1,380 0 61.8 44,740 Peak discharge.- Dec. 11 (Is30 a.m.) 2,280 aec.-ft.j Feb. 11 (3 a.m.) 1,910 aec.-ft.j Feb. 13 (11 p.m.) 1,840 aec.-ft. GUADALUPE CREEK BASIN 159 Los Gatos Creek at Los Gatos, Calif. Location.- Water-stage recorder and concrete control, lat. 37°13'15", long. 121°59'00", In SWi sec. 21, T. 8 S., R. 1 W., about 700 feet upstream from highway bridge at Los Gatos. Altitude, about 360 feet. Drainage area.- 40.0 square miles. Records available.- January 1930 to September 1938. Extremes.- Maximum discharge during year, 4,8 second-feet Dec. 11 (gage height, 12.20 feet), from rating curve extended above 2, second-feet on basis of velocity-area studies; no flow Oct. 1 and Sept. 12-15. 1930-38: Maximum discharge, 5,500 second-feet Feb. 13, 1937 (gage height, 12.90 feet), from rating curve extended above 2,600 second-feet on basis of velocity-area studies; no flow during part of most years. Remarks.- Records good except those for periods of very low flow, which are fair. Sever- al small storage reservoirs and diversions above station. Discharge, In year October 1937 to September 1938 Day Got. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0.6 0 8 17 1,160 266 153 63 18 9 0.4 2.8 2 .4 ,6 7 31 942 88V 141 48 IV 9 .2 4.9 S 2.0 .3 6 23 1,160 462 134 46 16 8 .5 1.9 4 1.1 .3 6 16 1,060 338 163 44 16 8.5 3.8 1.4 6 .4 .4 6 15 835 283 164 42 16 7.5 6.5 .2 6 .3 3.4 1 0 14 661 261 128 41 16 6 2.8 .1 7 .3 3,1 6 14 433 267 119 39 17 5 2.5 .2 S .3 .4 6 14 329 239 110 38 17 6.5 .2 .6 9 .2 .4 29 13 464 214 100 38 16 8 .2 .2 10 .2 .4 1,260 11 1,160 200 98 34 16 8 .4 .1 11 .2 24 2,460 11 1,490 222 92 28 14 8 3.0 .1 12 .2 10 480 12 872 646 89 26 14 9 .3 0 13 ,2 6.5 ^200 11 1,280 762 86 26 13 10 ,2 0 U 6 11 131 11 1,240 491 81 24 13 11 .1 0 16 6 8 86 13 711 374 77 26 12 6.5 .1 0 16 .8 l.V 65 14 636 417 73 26 11 2.4 .1 .1 17 .6 22 56 39 412 360 71 24 11 2.0 .2 .9 IS .6 8.6 48 26 396 304 6V 24 10 1.1 .2 .3 19 1.2 l.V 43 81 331 277 62 23 12 1.0 .5 .2 20 .6 4.8 38 47 277 274 61 22 12 .7 .4 .3 21 .4 19 35 33 260 239 60 22 11 .6 .2 .2 22 .4 V 33 27 228 222 68 21 11 .6 ,6 .1 23 ,4 3.9 31 24 210 376 57 20 12 .6 2.8 .1 24 .4 7,6 28 18 196 514 59 21 9.6 .8 ,4 .1 25 ,4 1.8 28 16 182 347 57 21 9.5 .8 .2 .1 26 .3 1.2 27 16 170 281 53 24 8.5 1.2 .2 .1 27 .3 1.0 23 16 155 243 63 23 8.6 1.0 .2 .2 28 .3 .8 22 75 202 21V 54 23 7 .8 .2 .2 29 ,3 1,4 20 90 196 62 22 9 1.0 .1 .2 30 ,6 .8 18 66 178 68 20 9 .7 .1 .4 31 2,9 18 1,690 164 19 .3 .2 Seeond- Month foot-daya Maximum Minium Mean ^-feet* Dot 28.2 6 0 0.91 66 Hoi 152.5 24 .3 6.08 302 Dec 6,176.5 2,460 .6 167 10,270 C alandar year 193 21,979.4 2,460 0 60.2 43,600 Jar 2,394 1,690 11 77.2 4,Y50 Pat 17,331 1,490 156 619 34 ,380 Max 10,490 887 164 338 20,810 Ap, 2,619 164 52 87.3 5,190 Ma, 907 63 19 29.3 1,800 Jui 380.0 18 7 12.7 754 Ju] 136.5 11 .3 4.37 269 Auj 26.7 5.6 .1 .86 53 Set 16.0 4.9 0 .53 32 1Fater year 193V-J 39,656.4 2,460 0 109 78,670 Peak discharge .- Dec. 11 (2 a.m.) 4,800 sec. -ft. $ Jan. 31 (1«30 p.m.) 2,730 aec.-ft.j Feb. 13 (9i30 p.m.] 2,230 t ec. ft. 160 GUADALUPE CREEK BASIN Campbell Creek at Saratoga, Calif. Location.- Water-stage recorder and concrete control, lat. 37°15'15", long. 122°02'25", in Quito grant, hair a mile southwest or Saratoga post office, Santa Clara County. Altitude, about 500 feet. Drainage area.- 8.8 square miles. Records available.- October 1933 to September 1938. Extremes.- Maximum discharge during year, 611 second-feet Feb. 2 (gage height, 3.71 feetj; no flow Oct. 10-13. 3933-38: Maximum discharge, 910 second-feet Feb. 13, 1937 (gage height, 3.8 feet outside staff, computed on basis of lower readings, 3.4 feet inside staff, affected by drawdown).from rating curve extended above 430 second-feet; no flow during short periods each year. Remarks.- Records good. Diversion and regulation above station by San Jose Water Works. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.1 0.8 1.2 3,7 160 51 36 12 4.8 2.0 1.0 0.3 2 .4 .8 1.2 4.2 228 186 34 12 4.6 2.3 .8 .4 3 .9 .8 1.3 3.7 219 110 31 11 4.4 2.4 .9 .4 4 .8 ,5 1.1 3.6 200 83 40 11 4.6 2.4 .7 .3 6 .8 .4 .9 3.6 152 67 35 11 4.8 2.2 .7 .3 6 .6 .5 1.2 3.2 119 60 30 9.5 4.4 2.0 .7 .4 7 .6 .7 1.2 3.2 89 55 29 9.5 4.2 2.0 ,7 .4 8 .5 .8 1.2 3.2 65 47 27 9.5 4.0 1.9 .7 .3 9 .1 .6 5 3.2 97 41 26 9.5 4.2 1.8 .7 .3 10 0 .5 156 3.1 165 37 25 9.5 4.0 2.0 .7 .2 11 0 3.9 275 3.0 209 41 24 9.5 3.8 2.4 .6 .2 12 0 1.6 77 2.7 160 127 23 8 3.8 2.0 .5 .2 13 0 1.1 30 3.0 260 170 21 8 3.8 1.8 .5 .2 14 1.4 2.8 17 3,0 229 108 20 7.5 3.4 1.6 .6 .2 16 1.0 1.5 13 3.3 168 86 19 7,5 3.2 1,6 ,6 .2 16 ,8 .9 11 3.5 114 94 18 7,5 3,0 1.4 .6 .3 17 1.0 3.8 9.5 9.5 93 77 18 7 2.8 1,5 .6 .5 18 .9 1.9 9 7.5 86 69 17 6.5 2,8 1.4 .6 .4 19 .7 1.0 8 17 67 60 16 7 2.8 1.4 .6 .6 20 .7 1.8 7.5 12 53 64 15 7 3.0 1.2 .6 .9 21 .6 2.6 7 9 46 54 15 7 2.8 1,2 .5 .7 22 .3 1.8 7 8 41 47 15 6.5 2.5 1.1 .6 .7 23 .3 1.8 6.5 7.5 39 96 15 6,5 2.3 1.2 .5 .6 24 .3 1.8 6 7 37 116 15 6 2.3 1.2 .5 .5 25 .6 1.6 5.5 7 36 94 15 6 2.3 1.2 .5 .5 26 .6 1.3 5.5 7 33 76 14 6 2.3 1.2 .5 .5 27 .3 1.0 5 6.5 30 65 13 6 2.0 1.2 .4 .7 28 .4 1.1 4.8 11 46 57 14 6 2.3 1.4 .3 .7 29 ,5 1.3 4.5 15 49 13 6 2.3 1.2 .3 .4 30 .4 1.3 4.2 12 43 14 5.5 2.4 1.2 .4 .5 31 .8 4.0 224 39 5.5 1.3 .3 Second- Run-off In Month foot -days Maximum Minimum Mean acre-feet Dot 16,3 1.4 0 0.53 32 Not 42.3 3,9 .4 1.41 84 Dec 687.3 275 .9 22.2 1,360 C 4,290 276 0 11.8 8,510 Jan u» 413.2 224 2.7 13.3 820 Pet 3,241 260 30 116 6,430 Mar 2,369 186 37 76.4 4,700 Apr 647 40 13 21.6 1,280 Kaj 247.0 12 6.5 7.97 490 Jun 99.9 4.8 2.0 3.33 198 Jul 50.7 2,4 1.1 1.64 101 £" 18.2 1.0 .3 .59 36 Sep 12.8 .9 .2 .43 26 1ater year 1937-3 7,844.7 275 0 21.5 16,660 Peak discharge.- Dec. 11 (1 a.m.) 634 seo.-ft.; Jan. 31 (12 jn.) 512 seo.-ft.; Feb. 2 (8 p.m.) 611 see.-ft. COYOTE CREEK BASIN 161 Coyote Creek near Madrone, Calif. Location.- Water-stage recorder, lat. 37°10'00", long. 121°37'40", in northwest corner of San Jose grant, a quarter of a mile upstream from highway bridge at mouth of can yon, a quarter of a mile downstream from mouth of Las Animas Creek, and 2.8 miles northeast of Madrone, Santa Clara County. Altitude, about 420 feet. Drainage area.- 193 square miles. Records available.- October 1902 to September 1912, December 1916 to September 1938. Average discharge.- 32 years (1902-12, 1916-38), 75.5 second-feet. Extremes.- Maximum discharge during year, 6,670 second-feet Feb. 11 (gage height, 12.2 feetJ; minimum, 1.0 second-foot Dec. 7. 1902-12, 1916-38: Maximum discharge, about 25,000 second-feet Mar. 7, 1911, rec ord furnished by Duryea, Haehl, & Oilman; no flow at times. Remarks.- Records excellent. No large diversions. Flow regulated by storage in Coyote Reservoir, which began in 1936; water released during summer. Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. HOT. Deo. Jan. Feb. Bar. Apr. May June July Aug. Sept. 1 78 55 1.2 6.5 716 533 188 62 21 64 51 46 2 71 55 1.3 7 606 2,430 174 60 20 59 51 46 s 70 52 1.2 6.5 1,070 1,910 161 59 33 55 51 46 4 70 52 1.1 *6 1,910 1,070 160 58 61 55 51 48 6 69 52 1.1 *5.5 1,550 685 241 50 65 54 51 47 6 69 51 1,1 «5.5 1,030 525 205 53 74 54 49 73 7 69 51 1.1 5.5 666 458 169 52 86 54 46 77 8 68 51 1.1 5.5 446 430 148 51 87 49 45 84 9 68 51 6 5 705 320 132 51 79 56 45 84 10 67 50 70 5 2,570 258 125 47 78 55 33 84 11 64 51 1,230 7.5 6,020 278 141 43 78 55 6 83 12 65 50 129 19 3,200 1,210 160 42 78 55 5 83 13 66 50 39 19 2,500 2,750 177 42 78 54 4.8 83 14 66 51 17 21 4,920 1,670 191 36 78 54 5 83 16 66 50 9.5 27 2,250 980 190 32 71 54 5 83 16 65 46 7 28 1,160 785 150 35 52 54 5 83 17 65 6.5 6 29 755 670 117 39 74 54 5 83 18 62 3.2 5.5 27 617 525 116 39 69 54 5 83 19 59 2.5 5 31 645 444 114 44 69 53 30 83 20 59 2.1 5 34 505 481 113 41 69 52 43 82 21 58 1.9 10 31 423 465 112 42 67 52 43 82 SS 57 1.7 11 30 364 413 112 43 62 52 43 82 23 50 1.7 10 30 268 340 112 49 63 52 43 82 24 54 1.6 99* 5 29 172 581 113 55 63 51 45 81 25 52 1.4 23 185 576 112 46 63 51 48 81 26 50 1.4 9.5 32 183 458 105 35 64 51 48 81 27 50 1.4 9.5 32 169 380 62 39 64 51 47 81 28 51 1.3 9 52 186 334 62 56 64 51 i7 81 29 57 1.3 9.5 81 _ 236 62 56 64 51 47 81 SO 56 1.2 9 69 _ 205 66 46 64 51 46 81 31 56 - 9 312 - 201 - 22 - 51 46 Seoond- Run-off in Month foot-days M^TlBP"" Minimum Mean acre-feet 1,927 78 50 63 .2 847.2 55 1 2 28 2 1*680 1,643.2 1,230 i!i 53!o 3,260 36,013.6 3,150 1.1 98.7 71 ,430 1,021.5 312 5 33.0 2,030 February...... 35 ,791 6,020 169 1 $278 70,990 22,601 *S41 201 729 44,830 April ...... 4,090 62 136 8,110 May...... 1,425 62 22 46 «0 2 » 830 1 ,958 87 20 65.3 3 1 880 July...... 1 ,658 64 49 53.5 1,089.8 51 46*4 8 35.2 2*,160 2,277 84 75.9 4,520 Water year 1937-3 8...... 76,328,7 6,020 1.1 209 151,400 Peak discharge.- Feb. 11 (12 m.) 6,670 sec.-ft.5 Feb. 14 (6 a.m.) 6,020 sec, -ft.; Mar. 2 (2:30 p.m.) 3,150 sec.-ft. *Intake plugged; discharge Interpolated. 162 COYOTE CREEK BASIN Coyote Creek near Edenvale, Calif. Location.- Water-stage recorder and concrete control, lat. 37°16'15", long. 121°47'55", at east boundary of Santa Teresa grant, at "The Narrows", li miles northeast of Edenvale, Santa Clara County, and 7 miles south of San Jose. Altitude, about 190 feet. Drainage area.- 229 square miles. Records available.- October 1916 to September 1938. Average discharge.- 22 years, 34.6 second-feet. Extremes.- Maximum discharge during year, 7,920 second-feet Feb. 11 (gage height, 8.7 feet,); no flow during several periods. 1916-38: Maximum discharge, 10.000 second-feet (unregulated) Feb. 10, 1922 (gage height, 12.8 feet, from floodmarksj, from rating curve extended above 4,900 second- feet parallel to 1917 curve defined by current-meter measurements to 8,400 second- feet; no flow for several periods during each year. Remarks.- Records excellent. Water pumped from wells along creek above station for irrigation. Flow regulated by storage in Coyote Reservoir above station,which began in 1936; water released during summer. Discharge, in second-feet, water year October 193Y to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 5.5 9.5 0 0 880 474 180 44 9.5 22 15 10 2 12 9 0 0 461 1,730 168 39 4.5 22 14 9.5 S 14 8 0 0 1,480 1,890 154 36 3.0 20 14 10 4 16 5 0 0 1,730 1,150 150 33 2.0 19 14 11 5 17 3.6 0 0 1,630 759 214 32 23 15 14 10 6 17 4.6 0 0 1,100 548 210 25 15 14 15 10 7 18 6 0 0 705 462 172 25 14 15 12 21 8 18 6 0 0 479 426 147 24 16 16 12 33 9 18 6 0 0 621 348 106 22 24 12 10 36 10 18 4.9 0 0 1,970 251 80 14 23 16 9 37 11 16 7.5 1,370 0 6,890 260 90 29 24 16 8 37 12 16 5 365 0 3,500 851 136 31 30 16 15 39 13 16 4.9 150 0 2,230 2,120 143 13 26 16 1.3 40 14 22 8 75 0 4,910 1,680 165 9.5 26 16 0 40 15 20 8 32 0 2,300 1,020 165 5.5 26 17 0 40 16 19 8 12 0 1,260 801 154 5.5 18 18 0 42 17 19 3.5 2.3 0.8 815 703 101 .6 14 18 0 44 18 18 0 0 7 641 542 96 .4 23 17 0 44 19 14 0 0 9 675 456 96 .3 25 16 0 42 20 14 0 0 .6 555 450 93 .2 22 16 0 42 21 13 0 0 0 456 462 90 0 22 16 0 42 22 12 0 0 0 409 403 90 0 22 16 0 44 23 8 0 0 0 342 348 90 2,1 22 16 0 42 24 9 0 0 0 193 486 90 8.5 20 16 1.7 40 25 10 0 0 0 189 542 93 13 18 16 9 40 26 7.5 0 0 0 185 450 88 16 22 16 3.4 40 27 6 0 0 0 172 375 60 17 22 16 9.5 42 28 6 0 0 0 168 326 45 10 22 16 12 42 29 9 0 0 3.0 260 45 10 22 15 12 42 30 10 0 0 30 197 47 10 22 15 12 42 31 11 - 0 278 - 193 - 11 - 15 12 - Seccnd- MflX^TOflP Run-off in Month foot-days Minimum Mean acre-feet October...... 429.0 22 5.5 13.8 851 November...... 10Y.5 9 5 0 3.58 213 December...... 2,006,3 1,370° 0 64.7 3,980 21,142.4 3,260 0 57.9 41,940 328.4 278 0 10.6 651 February...... 36,946 6,890 168 1,320 73,280 20 963 2,120 676 41,580 April ...... 3^558 214 45 119 7,060 toy...... 486.6 44 0 15.7 965 582.0 30 2 U/-1 19 4 1,150 July...... 510 22 ±&T ?> is.'s 1,010 224 9 15 0 7.25 446 1,013 Is 44 9.5 33.8 2,010 Water year 1937-28...... 67,155.2 6,890 0 184 133,200 Peak discharge.- Dec. 11 (8 a.m.) 3,060 sec.-ft.j Feb. 11 (2 p.m.) 7,920 sea,-ft.; Feb. 14 (16 a.m.) 5,660 sec.-ft. ALAMEDA CREEK BASIN 163 Alameda Creek near Niles, Calif. Location.- Water-stage recorder and concrete control, lat. 37°35'15", long. 121°57'35", in Arroyo de la Alameda grant, an eighth of a mile upstream from highway bridge, and 1? miles northeast of Niles, Alameda County. Altitude, about 100 feet. Drainage area.- 633-square miles. Records available.- October 1916 to September 1938. Average discharge.- 21 years (1916-19, 1920-38), 78.1 second-feet. Extremes.- Maximum discharge during year, 10,500 second-feet Feb. 11 (gage height, 11.46 feet;; minimum, 1.5 second-feet Nov. 29, 30. 1916-38: Maximum discharge, 13,900 second-feet Feb. 10, 1922 (gage height, 12.44 feet, former site and datum), from rating curve extended above 7,600 second-feet: no flow during periods in 1918, 1924-35, and possibly 1920. Remarks.- Records excellent. Flow regulated by storage at Calaveras Reservoir, which has a capacity of 100,OOC acre-feet. Diversions above station for San Francisco water supply and 'for other uses. Gage-height record collected in cooperation with city of San Francisco. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOY. Deo. Jan. Feb. Mar. Apr. May June Jt'ly Aug. Sept. 1 12 13 1.6 148 3,080 858 540 180 33 12 25 11 8 12 13 1.8 148 1,990 3,500 478 142 32 10 23 11 3 12 13 2.1 148 5,700 2,490 496 134 32 9 23 8 4 12 13 2.4 148 3,940 1,610 508 122 32 7 24 8 6 12 13 2.4 148 2,060 1,150 755 104 40 4.8 24 8.5 6 12 13 2.4 148 1,460 932 566 110 41 31 24 8 7 12 13 2.5 148 888 805 502 99 46 54 26 7.5 8 12 13 2,8 151 644 762 478 106 40 56 26 9 9 12 13 17 151 755 692 466 108 45 50 26 8.5 10 12 11 77 151 2,770 637 450 117 47 34 20 8 11 12 11 2,750 151 8,250 686 440 114 48 34 18 9 12 12 13 2,040 151 6,920 1,150 400 110 47 29 17 9 IS 12 15 688 151 3,810 4,960 430 106 47 32 18 9.5 14 13 17 265 136 8,400 3,680 365 78 49 42 18 9.5 16 13 16 95 105 4,340 2,160 351 66 52 44 18 9.5 16 13 17 172 101 2,660 2,060 395 60 55 47 19 9.5 17 13 19 172 115 1,710 1,860 395 54 62 47 19 14 18 12 18 160 110 1,420 l',350 356 43 69 46 18 14 19 12 17 154 115 1,290 1,120 324 41 62 46 18 15 20 13 9 151 136 988 1,420 375 37 62 47 16 16 21 12 8.5 148 133 820 1,190 370 34 82 47 16 16 22 12 6 148 112 727 980 302 46 40 38 16 15 23 13 6 148 108 685 1,010 302 48 58 28 16 14 24 13 6 148 105 624 1,760 356 45 62 21 15 11 25 13 4.3 145 108 546 1,260 342 44 63 18 14 10 26 13 2.5 145 112 552 1,010 284 44 38 32 15 11 27 13 2.1 148 112 533 865 346 43 17 23 13 12 28 13 1.8 148 142 514 769 306 38 17 27 11 11 29 13 1.6 148 172 _ 685 274 37 48 27 12 11 50 13 1.6 148 160 - 624 176 36 17 26 11 11 31 13 - 148 631 - 585 - 34 25 11 Second- Run-Off In Month f Dot-days M^yiipygq lH_plBMBl Mean acre-feet 385 13 1L(J O 12.4 764 320.4 19 1.6 10.7 636 8 »38X»0 2,750 1.6 270 16,620 57,875.4 5,480 1.0 159 114,800 4,655 631 101 150 9,230 68,076 8,400 514 2,431 135,000 March...... 44,619 4,960 585 1,439 88,500 April ...... 12,128 755 176 404 24,060 May...... 2 ,380 180 34 76.8 4,720 1,383 82 17 46.1 2,740 July...... 993.8 56 4.8 32.1 1,970 568 26 11 18.3 1,130 324.5 16 7.5 10.8 644 Water year 1937-5 144,213.7 8,400 1.6 395 286 ,000 Peak discharge.- Feb. 3 (11 a.m.) -7,400 seo.-ft.j Feb. 11 (1 p.m.) 10,500 sec.-ft.; Feb. 14 (12 m.) 10,300 sec.-ft. 164 KERN RIVER BASIN Kern River near Kernville, Calif. Location.- Water-stage recorder, lat. 35°56 f , long. 118°29', in NEi sec. 14, T. 23 S., R. 32 E., 3 miles upstream from Salmon Creek and 15 miles north, of Kernville. Altitude, about 5,550 feet. Drainage area.- 845 square miles. Records available.- January 1912 to September 1938. Ave rage dls charge.- 26 years, 692 second-feet, combined flow of Kern River near Kernville and Kern River no. 3 canal. Extremes.- Maximum discharge during year, 7,000 second-feet Mar. 2 (gage height, 11.68 feet); minimum, 0.6 second-foot Dec. 30 to Jan. 3, Jan. 11-14. 1912-38: Maximum discharge. 9,690 second-feet (unregulated) Jan. 17, 1916 (gage height, 8.8 feet, former datum), from rating curve extended above 4,100 second-feet; no flow at times during July 31, 1924 to Feb. 7, 1925. Remarks.- Records good. See record for Kern River no. 3 canal, which diverts water 1 mile above station. Gage-height record and results of several discharge measurements furnished by Southern California Edison Co. Discharge, In second-feet, water year October 1937 to September 1938 Day Got. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.4 6 1.4 0.6 2.0 790 479 1,740 4,680 1,900 718 28 a 1.4 9.5 1.5 .6 2.0 3,250 610 1,820 5,340 2,040 672 6.5 s 1.6 6 1.3 .6 2.6 1,780 790 1,580 5,880 1,990 610 2.0 4 1.6 1.5 1.2 .7 3.3 940 970 1,580 6,060 1,700 522 1.7 5 1.6 1.4 1.2 .8 3.1 650 1,270 1,660 5,700 1,580 452 1.6 1 ,580' 6 1.5 1.4 1,2 .8 3.1 522 970 1,700 5,160 463 1.5 7 1.5 1.4 1.1 .8 3.0 402 940 1,740 5,000 1,660 486 1.4 S 1.5 1.3 1.2 .8 2.8 322 1,090 1,860 4,680 1,740 534 1.3 9 1.4 1.2 15 .7 4.8 243 1,270 1,990 4,680 1,740 392 1.3 10 1.4 1.3 2,110 .7 5.5 196 1,370 2,230 4,680 1,580 320 1.3 11 1.3 1.4 2,120 .6 22 230 1,440 3,540 4,520 1,440 253 1.3 12 1.3 1,4 1,900 .6 7.5 1,220 1,400 2,930 3,660 1,270 221 1.4 13 1.2 1.5 718 .6 4.8 1,270 1,270 3,380 2,990 1,120 183 1.3 14 1.2 1.5 460 .6 5 765 1,120 4,200 2,870 1,150 153 1.1 16 1.2 1.5 339 12 4,1 630 1,150 4,680 3,180 1,270 122 1.2 16 1.1 1,5 269 9.5 3.8 672 1,300 4,360 3,520 1,370 98 1.2 17 1.1 1.5 214 1.7 3.4 695 1,580 3,890 3,520 1,620 79 1.3 18 1.0 1.5 170 1.5 4.1 570 2,080 3,820 3,120 1,240 63 1.6 19 .9 1.5 135 1.5 5.5 610 2,700 3,590 3,240 1,210 52 1.5 20 .9 1,3 109 1.5 4.1 765 2,990 3,240 2,430 1,210 31 1.3 Si .8 1.3 92 1.4 4.4 590 3,050 3,520 2,080 1,120 15 1.2 22 .9 1.3 79 1.5 4.6 498 3,180 3,310 2,080 1,060 9.5 1.3 23 1.0 1,3 45 1.4 4.6 456 3,120 3,050 2,330 1,150 8.5 1.3 24 1.0 1.4 2 0 1.5 5.5 518 2,990 3,380 2,870 1,090 8 1.3 25 .9 1.4 1 2 1.5 4.1 518 2,590 3,660 3,310 1,180 11 1.3 26 .9 1.4 1 1 1,4 4.1 435 2,280 4,040 3,380 1,300 36 1.3 27 1.0 1.4 1 0 1.4 3,9 452 2,280 4,360 3,310 1,270 58 1.2 23 1.1 1.3 9 1.4 195 554 2,330 4,200 2,930 970 29 1.3 29 1.1. 1.3 8 1.5 542 2,180 3,960 2,180 915 59 1.5 50 1.1 1.3 6 1.5 445 1,900 3,960 1,900 865 106 1.2 31 1.2 6 1.6 428 4,360 815 93 Second- Run-Off In Month foot-days Maximum Minimum Mean acre-feet Oet 37.1 1.6 0.8 1.20 74 Hoi 59.0 9.5 1.2 1.97 117 Dec 8,793.3 2,120 .6 284 17,440 Calendar year 1937 ...... 285,238.3 5,340 .6 781 565,700 Jan u»ry 53.3 12 .6 1.72 106 Fet 322.7 195 2.0 11.5 640 Mar 21,958 3,250 196 708 43,550 Apr 52,689 3,180 479 1,756 104,500 May 97,330 4,680 1,580 3,140 193,100 Jun 111,280 6,060 1,900 3,709 220,700 Jul 42,145 2,040 815 1,360 83,590 Aug 6,857.0 718 8 221 13,600 Sep 72,7 28 1.1 2.42 144 ater year 1937-3 341,597.1 6,060 .6 956 677,600 Peak discharge.- Dee. 11 (8 p.m.) 6,800 sec.-ft.; Mar. 2 (4:15 p.m.) 7,000 sec.-ft.; June 4 (7 p.m.) 6,800 see.-ft. KERN RIVER BASIN 165 Combined discharge, in second feet, of Kern River and Kern River no. 3 canal near Kernville, Calif,, for water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 254 237 226 372 393 1,370 1,090 2,310 5,280 2,490 1,330 617 2 250 234 236 389 401. 3,860 1,200 2,390 5 ',940 2,630 1,290 576 S 254 235 237 374 439 2,370 1,380 2,150 6,470 2,580 1,220 562 4 263 234 228 354 421 1,530 1,580 2,150 6,650 2,290 1,140 542 6 264 232 224 343 390 1,240 1,860 2,230 6,290 2,170 1,070 532 6 264 234 224 333 426 1,110 1,560 2,270 5,750 2,170 1,080 512 7 260 236 225 335 457 991 1,520 2,310 5,590 2,250 1,100 496 8 262 232 223 328 477 912 1,700 2,430 5,280 2,330 1,150 476 9 279 233 260 315 535 833 1,880 2,560 5,280 2,330 1,000 456 10 258 235 2,470 326 526 787 1,950 2,800 5,280 2,170 931 446 11 255 239 2,480 319 547 823 2,020 4,100 5,120 2,030 864 436 12 252 247 2,240 317 500 1,810 1,980 3,500 4,260 1,860 834 431 13 256 242 1,070 315 47V 1,860 1,850 3,940 3,590 1,710 792 421 14 275 248 810 315 517 1,360 1,700 4,760 3^470 1,740 761 411 16 269 244 689 343 486 1,220 1,730 5,240 3,850 1,860 728 406 16 265 238 618 330 473 1,270 1,880 4,920 4,170 1,950 702 403 17 257 254 567 419 446 1,290 2,160 4,460 4,120 1,860 682 406 18 250 266 528 386 448 1,160 2,660 4,380 3,720 1,860 664 420 19 244 248 495 368 436 1,200 3,280 4,150 3,830 1,830 6B1 438 20 242 251 469 340 503 1,360 3,570 3,790 3,020 1,830 628 409 21 239 249 451 330 495 1,180 3,630 3,550 2,670 1,740 609 392 22 238 243 436 362 510 1,090 3,760 3,380 2,670 1,680 602 393 23 239 241 453 341 529 1,050 3,700 3,610 2,920 1,760 600 382 24 238 241 391 330 560 1,110 3,570 3',980 3,460 1,700 598 369 2? 236 242 380 330 534 1,110 3,170 4,260 3,900 1,790 603 364 26 236 239 393 333 525 1,020 2,860 4,640 3,970 1,910 629 356 27 234 238 393 333 534 1,040 2,860 5,000 3,900 1,880 650 353 28 234 233 374 339 763 1,140 2,900 4,890 3,526 1,580 619 389 29 234 232 372 358 1,140 2,760 4,560 2,770 1,530 650 482 30 236 229 373 338 1,030 2,470 4,560 2,490 1,480 698 447 31 236 369 364 1,020 4,960 1,430 684 Seoond- Run-off In Month foot-days Hqxtpman M^p^HI"1" Mean acre-feet Dot 7,773 279 234 251 15,420 Hoi 7,206 266 229 240 14,290 Dec 18,904 2,480 223 610 37,500 C 445 ,177 5,920 186 1,220 883 ,000 Jan nary 10,679 419 315 544 21,180 Fet> 13,748 763 390 491 27 ,270 Mar 40,286 3,860 787 1,300 79,910 Apr 70,230 3,760 1,090 2,341 139,300 May 114,230 5,240 2,150 3,685 226,600 Jun 129,230 6,650 2,490 4,308 256,300 Jul 60,420 2,630 1,430 1,949 119,800 Auf list ...... «... 25,559 1,330 598 824 50., 700 S«p 13,322 617 352 444 26,420 1ater year 1937-3 511,587 6,650 223 1,402 1,015,000 166 KERN RIVER BASIN Kern River near Bakersfield, Calif. Location.- Water-stage recorder, lat. 35°25'54", long. 118°56'43", in SWi sec. 2, T. 29 S., K. 28 E., at mouth of lower canyon, 5 miles northeast of Bakersfield. Altitude, about 470 feet. Drainage area.- 2,420 square miles (revised). Records available.- October 1893 to September 1938. Average discharge.- 43 years (1893-1906, 1908-38), 963 second-feet. Extremes.- Maximum discharge during year, 14,582 second-feet Mar. 3 (gage height, 9.24 feet); minimum, 245 second-feet Nov. 1. 1896-38: Maximum discharge, 20,000 second-feet Feb. 7, 1937 (gage height, 9.12 feet); minimum, 57 second-feet (regulated) in November 1924. Remarks.- Complete record, except run-off in acre-feet and yearly figures, furnished by kern County Land Co. Regular station disabled by flood in February 1937 and not used again until Nov. 9, 1937. Discharge for Oct. 1 to Nov. 8, 1937, computed by adding discharge at station li miles downstream to discharge of canal that diverts between stations. Many irrigation diversions and four power plants upstream from station. Discharge, In second-feet, water year October 1937 to September 1938 Day cot. HOT. Dee. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 274 245 272 553 524 1,723 1,605 4,050 6,112 2,764 1,483 769 2 272 262 268 552 606 3,535 1,634 3,890 6,465 2,803 1,396 729 s 268 253 269 568 603 11,461 1,824 4,114 6,941 2,909 1,344 686 4 265 257 270 669 668 5,952 2,133 3,845 7,300 2,796 1,269 634 B 274 260 270 640 717 3,530 2,601 3,840 7,272 2,518 1,166 602 6 281 255 271 520 663 2,731 2,926 3,903 6,839 2,406 1,064 573 7 288 260 277 509 662 2,379 2,489 3,851 6,513 2,428 1,033 553 8 285 267 266 495 686 2,127 2,396 3,818 6,137 2,499 1,060 537 9 279 259 296 490 720 1,393 2,577 3,984 6,842 2,645 1,083 519 10 300 259 926 477 854 1,665 2,840 4,164 5,790 2,600 1,019 495 11 296 264 2,175 471 865 1,524 3,021 4,460 5,811 2,314 986 478 12 286 268 4,227 471 958 1,730 3,168 4,911 5,413 2,057 927 462 13 280 270 2,711 469 889 3,796 3,246 5,389 4,644 1,929 895 454 14 280 273 1,353 469 814 3,453 2,982 6,126 4,111 1,800 858 445 16 290 281 1,158 471 814 2,628 2,762 6,892 4,180 1,885 839 432 16 292 282 1,049 478 767 2,334 2,755 7,056 4,573 2,006 804 425 17 288 280 940 488 722 2,396 3,084 6,739 4,798 2,031 766 416 18 286 284 859 536 705 2,311 3,669 6,182 4,609 2,062 739 414 19 278 300 794 598 728 2,146 4,696 5,859 4,117 2,000 717 413 SO 277 296 753 658 726 2,166 5,604 5,503 3,752 1,925 701 414 S3. 278 297 724 539 796 2,312 6,010 5,133 3,390 1,918 688 417 22 273 298 707 501 806 2,046 6,278 4,790 3,090 1,793 672 420 29 272 294 701 607 S20 1,865 6,417 4,685 3,126 1,777 651 412 24 275 290 705 603 841 1,790 6,341 4,954 3,448 1,846 635 402 25 279 289 656 484 875 1,831 6,149 5,347 3,928 1,798 626 394 26 275 288 609 467 861 1,791 5,437 5,711 4,198 1,909 618 384 27 277 288 596 469 860 1,686 4,719 6,065 4,193 2,068 616 383 28 281 284 589 470 867 1,689 4,490 6,143 4,064 1,964 632 388 29 282 279 666 491 ., 1,799 4,562 5,926 3,576 1,673 650 394 30 284 276 552 536 -. 1,783 4,492 5,739 2,926 1,587 661 423 31 245 - 564 513 - 1,667 - 5,777 - 1,516 716 - Second- Run-off In Month foot-days MnTlrnim Minimum Mean acre-feet October...... 296 * 279 17,170 303 275 16 ,380 6,859 267 861 52,320 Calendar year 1937 ...... 20,000 _ 1,741 1,260,000 464 508 31,270 1,005 495 764 42,460 March...... 14,582 924 2,637 162,100 April ...... 6,645 1,585 3,765 223 900 Hay...... 7 252 3 ,518 5 124 315 ,000 7^661 2 795 291 900 July...... 3,043 1^422 on Note.- The figures of maximum and minimum discharge as shown for each month represent the instan taneous values. KERN RIVER BASIN 167 Kern River No. 3 canal near Kernville, Calif. Location.- Water-stage recorder, lat. 35°54', long. 118°28', In NEi sec. 25, T. 23 S., R. 32 E., 4 mllec dovwistream from intake and 12 miles north of Kernville. Altitude, about 3,590 feet. Records available.- March 1921 to September 1938. Average discharge.- 17 years, 347 second-feet. Extremes.- Maximum daily discharge during year, 689 second-feet May 28; minimum daily, 53 second-feet May 21. 1921-38: Maximum daily discharge, that of May 28, 1938; no flow at times. Remarks.- Records good except those for period of missing gage heights, Sept. 2-13, which were computed on basis of records for Borel Canal at Tilley Creek and are fair. Canal diverts from left bank of Kern River in sec. 12, T. 23 S., R. 32 E. Water is used for power and returned to river 8 miles downstream. Gage-height record and re sults of several discharge measurements furnished by Southern California Edison Co. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dee. Jan. Feb. Bar. Apr. May June July Aug. Sept. 1 253 231 226 371 391 583 608 571 596 591 614 589 2 349 224 235 388 399 609 695 568 595 591 614 670 3 252 229 236 373 436 586 686 569 694 691 614 660 4 261 233 227 353 418 587 609 670 693 691 614 540 6 262 231 223 342 387 687 585 569 593 591 614 630 6 263 233 223 332 423 687 585 568 594 591 613 610 7 269 236 224 334 454 589 586 567 *594 692 612 495 8 261 231 222 327 474 690 612 566 *596 591 612 476 9 278 232 246 314 530 590 609 565 *596 591 612 465 10 267 234 366 326 621 591 584 566 *597 591 611 445 11 254 238 364 318 625 593 584 665 *698 590 611 436 12 261 246 345 316 492 591 684 565 »599 589 613 430 13 255 241 360 314 472 690 684 565 599 588 609 420 274 246 360 314 512 592 585 565 601 587 608 410 16 268 242 350 331 482 694 584 566 672 586 606 406 16 264 237 349 321 469 594 586 664 650 676 604 402 17 256 253 353 417 443 693 584 566 599 241 603 406 18 249 264 358 385 444 692 583 565 596 618 601 418 19 243 247 360 367 430 692 682 561 694 617 599 436 80 241 250 360 339 499 590 582 650 593 616 597 408 21 238 S48 359 329 491 690 582 33 693 616 594 391 237 242 367 361 606 590 681 66 693 616 593 392 US S38 240 408 340 624 691 581 664 693 614 692 381 84 237 S40 389 328 554 591 580 602 592 614 690 368 85 236 241 379 329 630 690 578 602 692 614 592 363 26 236 238 392 332 521 689 576 600 693 614 693 366 233 237 392 332 530 590 *575 642 593 614 692 551 833 232 373 338 668 588 *674 689 592 614 590 388 29 233 231 371 367 _ 594 675 603 591 614 691 481 236 228 372 337 . 687 673 597 690 614 692 446 31 236 - 368 362 - 688 697 614 691 - Second- Run-off In Month foot-days Maxlunxm Minimum Mean acre-feet 7 164 224 10,116 408 222 326 20 ,060 169,942 645 . 33 438 317,200 21,080 691 April...... 17,670 612 673 686 34,850 May...... 16,906 13,254 689 361 442 26,290 Water year 1937- 170,032 689 33 466 337,200 *Qage height missing; discharge Interpolated. 168 KERN RIVER BASIN Borel canal at Tllley Creek, Calif. Location.- Water-stage recorder, lat. 35°42', long. 118°27', in NWi sec. 4, T. 26 S., R. 33 E., at point where canal crosses Tilley Creek, three-quarters of a mile south of Kernville. Altitude, about 2,570 fest. Records available.- January 1910 to September 1914, October 1925 to September 1938. Average discharge.- 13 years (1925-1938), 334 second-feet. Extremes.- Maximum daily discharge during year, 582 second-feet June 27, 28; minimum daily, 8 second-feet, July 10. 1925-38: Maximum daily discharge, 605 second-feet June 3-5, 1927, and May 22, 1936; no flow at times. Remarks.- Records good. Canal diverts water from Kern River half a mile below Kernville ^b~supply Borel hydroelectric plant of Southern California Edison Co., 10 miles down stream, at which point water is returned to Kern River. Gage-height record and results of several discharge measurements furnished by Southern California Edison Co. Discharge, In second-feet, water year October 1937 to September 1933 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 242 229 233 387 447 558 554 88 576 581 557 544 2 238 219 238 402 455 554 554 571 577 581 557 543 3 240 230 244 406 486 557 554 570 578 581 556 541 4 245 234 234 376 522 555 555 570 577 580 555 531 5 249 229 231 363 488 557 554 568 577 580 556 517 6 257 232 229 351 505 559 554 570 576 580 556 501 7 259 237 230 344 531 559 555 570 577 581 557 485 8 242 235 228 345 545 559 555 568 577 581 555 465 9 268 237 250 334 563 559 558 570 578 503 556 446 10 258 242 510 339 564 557 557 571 577 8 554 432 11 249 242 534 339 565 556 558 570 577 160 550 426 12 246 260 532 335 566 557 558 568 579 573 550 422 13 247 252 538 334 562 558 557 571 579 571 550 411 14 266 260 542 334 566 557 556 61 579 570 551 400 16 268 253 543 360 563 556 557 110 580 570 550 393 16 260 246 544 355 557 556 557 568 580 567 550 383 17 255 258 543 410 530 556 560 570 580 567 550 388 18 247 284 541 472 531 555 563 571 580 566 550 400 19 243 260 520 412 524 555 562 571 579 565 550 423 20 237 260 501 390 284 555 562 571 579 564 650 397 21 231 258 490 361 560 555 563 572 579 564 647 378 22 229 253 472 398 562 554 566 572 579 564 647 STY 23 232 249 496 383 563 555 566 572 580 562 647 368 24 232 250 449 364 562 555 566 572 580 562 645 356 25 233 249 410 360 562 555 559 572 580 562 543 348 26 230 246 416 366 560 554 563 573 580 562 545 341 27 227 245 419 365 560 554 568 573 582 559 544 335 28 226 242 398 3VO 560 554 568 572 582 559 543 357 29 225 237 389 407 _ 554 567 573 581 558 544 454 30 225 236 390 388 _ 554 67 573 581 557 544 429 31 232 - 387 398 - 554 574 - 557 544 - Second- MfrTtflfmp Minimum Mean Run-off In Month foot-days acre-feet 7 "538 268 225 South Fork of Kern River near Onyx, Calif. Location.- Water-stage recorder, lat. 35°44', long. 118°10', in SWJ sec. 24, T. 25 S., R. 35 E., three-quarters of a mile north of Kernville-Walker Pass road, 1.4 miles upstream from Canebrake Creek, and 5 miles northeast of Onyx. Prior to April 18, 1956, at site 140 feet upstream. Altitude, about 2,900 feet. Drainage area.- 531 square miles. Records available.- September 1911 to August 1914, January 1919 to September 1938. Average discharge.- 17 years (1911-13, 1919-25, 1929-38), 99.2 second-feet. Extremes.- Ilaxlmum discharge during year, 3,450 second-feet Mar. 2 (gage height, 6.69 feet), from rating curve extended above 1,900 second-feet; minimum, 19 second-feet Oct. 2. 1911-14, 1919-38: Maximum discharge, that of liar. 2, 1938; maximum gage height ,7.1 feet Jan. 25, 1914, former site; no flow for several days during July and August 1929 and in September 1934. Remarks.- Records good except those for days of missing gage heights, Jan. 31, Feb. 1, which were computed on basis of records for station at Isabella and are fair. Lowell and Thomas irrigation ditches divert about 2,000 acre-feet yearly above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 20 27 27 59 44 430 292 1,030 695 205 75 82 2 20 27 29 60 46 1,710 321 1,240 680 196 68 60 3 22 27 33 61 58 1,100 384 1,030 670 187 62 47 4 23 27 31 54 56 580 470 1,060 645 178 59 41 5 24 27 29 52 54 407 571 1,100 615 172 56 38 3 25 27 29 45 48 331 482 1,060 590 162 53 36 7 25 29 27 43 50 289 482 998 685 156 53 34 S 25 29 27 43 67 266 509 1,060 571 149 62 33 9 25 28 32 41 86 232 580 1,100 562 141 78 32 10 25 29 356 46 82 217 665 1,140 504 134 60 32 11 26 29 597 47 92 226 746 1,240 470 129 54 31 12 26 30 864 47 80 540 780 1,320 470 123 61 31 13 27 29 304 42 65 531 780 1,360 478 122 48 31 14 30 30 180 48 78 373 650 1,440 423 120 46 31 16 30 32 145 52 71 334 665 1,540 380 «118 45 31 16 29 30 122 47 68 344 763 1,440 358 115 44 30 17 29 31 105 45 57 358 870 1,360 334 108 43 32 18 28 35 96 52 60 321 1,170 1,240 314 106 42 35 19 27 33 86 45 67 324 1,540 1,170 301 104 41 41 20 27 32 74 41 77 358 1,720 1,100 304 104 40 42 21 27 34 66 38 82 324 1,910 998 355 102 38 39 22 26 33 66 49 94 292 2,010 900 314 104 36 37 23 26 32 69 52 105 295 1,960 870 280 104 34 36 24 26 32 47 45 112 311 1,910 840 263 99 33 35 25 26 32 40 43 107 318 1,670 834 249 99 31 34 26 26 32 49 44 103 286 1,360 834 232 183 32 33 27 26 32 56 44 110 280 1,320 840 219 187 37 S3 28 26 31 47 45 176 311 1,400 812 214 143 42 36 29 26 29 44 48 » 314 1,360 768 206 110 42 36 30 26 28 48 40 _ 286 1,170 741 212 96 63 39 31 26 - 47 44 - 280 710 85 105 Second- IHn^F"1?" Run-off In Month foot -days M^ylnriffll Mean acre-feet 800 30 20 25 8 1,590 903 36 27 soli 1,790 Of f f £ 864 27 122 7,480 99,502 1,710 18 273 197,400 1,462 61 38 47.2 2 900 2,195 176 44 78.4 4)350 12,568 1,710 217 405 24 930 April ...... 30,610 2,010 gog 1,017 60)620 WB _ 33,176 1 '595540 710 1,070 6f>*800 12 492 205 416 24,780 July ...... 4)l40 205 85 134 8 210 1 76Y3 105 31 60.7 3)120 1,127 82 30 37.6 2,240 Water year 1937-38...... 104 ,717 2,010 20 287 207,700 Peak discharge.-. Mar. 2 (6 p.m.) 3,450 sec.-ft.j Apr. 22 (8sSO a.m.) 2,220 sec.-ft.} Apr. 23 (8 a.m.) a,ISO see,-ft. Gage height missing; discharge interpolate-'. 170 KERN RIVER BASIN South Fork of Kern River at Isabella, Calif. Location.- Water-stage recorder, lat. 35°40', long. 118"28", in NWi sec. 20, T. 26 S., R- 33 E., at Isabella, a quarter of a mile upstream from Junction with Kern River. Zero of gage is 3,484.3 feet abo^e mean sea level. Drainage area.- 985 square miles. Records available.- October 1910 to September 1913; January 1929 to September 1938. Extremes.- Maximum discharge during year, 4,010 seconcl-feet Mar. 3 (gage height, 6.46 feet); minimum, 8.5 second-feet Nov. 18. 1929-38: Maximum discharge, 4,100 second-feet Feb. 7, 1937 (gage height, 6.92 feet), from rating curve extended above 1,600 second-feet, verified by velocity- area study; minimum, 0.3 second-foot July 26, 1931. Remarks.- Records good except those for Dec. 10-12 and March to July, which were af fected by backwater at times and are fair. Water is diverted from river above station by 27 irrigation ditches; considerable return flow from many of them. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jaa. Feb. Mar. Apr. May June July Aug. Sept. 1 11 12 16 80 79 218 235 1,100 660 133 34 12 2 11 12 15 82 78 728 240 1,050 648 120 30 12 3 10 12 15 83 79 2,580 273 1,140 648 113 24 12 4 11 13 15 83 87 1,240 323 930 624 108 20 12 6 14 13 16 83 87 736 410 970 636 106 20 13 6 13 13 16 80 85 540 427 1,010 636 95 18 13 7 13 13 16 77 82 431 391 930 630 83 17 12 8 13 13 16 77 84 364 379 930 618 75 17 12 9 13 13 17 74 92 313 410 970 612 65 17 11 10 13 12 32 76 103 267 485 970 600 60 17 11 11 13 13 249 78 104 245 575 1,010 550 57 17 13 12 13 13 720 78 114 340 628 1,050 536 56 17 16 13 13 13 725 78 105 634 656 1,100 532 52 17 15 14 13 13 303 79 99 520 585 1,190 496 48 17 12 16 13 13 204 82 104 402 525 1,400 452 39 16 12 16 13 10 168 83 102 372 545 1,450 413 35 16 12 17 13 9 145 81 97 387 672 1,450 368 34 16 12 18 13 9 132 84 96 364 820 1,340 338 31 16 12 19 13 11 122 84 104 343 1,100 1,240 323 30 16 14 20 13 13 114 84 108 360 1,570 1,140 311 28 16 12 21 13 11 105 79 109 368 1,700 1,050 290 26 16 12 22 13 11 100 77 111 326 1,980 930 285 24 16 12 S3 12 12 98 80 115 307 2,050 890 258 24 16 12 24 13 16 96 79 120 307 2,050 820 832 24 15 12 25 13 16 88 76 123 319 1,980 820 205 24 15 14 26 13 16 85 73 122 310 1,640 790 185 28 14 17 27 13 15 84 72 123 285 1,400 790 172 45 13 17 28 13 15 84 72 130 294 1,400 774 153 49 12 19 29 13 16 81 74 307 1,400 738 145 45 12 17 30 13 16 80 72 285 1,290 708 139 39 12 17 31 13 81 69 254 678 34 12 Second- Run-off in Month foot-days Mq;jCJ7n\flfl Minimum Mean acre-feet Oot 394 14 10 12.7 781 H07 387 16 9 12.9 768 Dec 4,038 725 15 130 8,010 C 98,285 2,900 9 269 194,900 January 2,429 84 69 78.4 4,820 Fab 2,842 130 78 102 5,640 Mar 14,746 2,580 218 476 29,250 Apr 28 ,139 2,050 235 938 55,810 toy 31,358 1,450 678 1,012 62,210 Jim 12,695 660 139 423 25,180 Jill 1,730 133 24 55.8 3,430 August...... 531 34 12 17.1 1,050 Sap 399 19 11 13.3 791 Vater year 1937-3 99,688 2,580 9 273 > 07 ,700 Peak discharge.- Har, 3 (9 a.m.) 4,010 sec. -ft.; Apr 22 (11:30 p.m.) 2,2SO sec. -ft.; Apr. 23 (10 p.m.) 2,190 sec. -ft. TULARE LAKE BASIN L 'L Tulare Lake in Kings County, Calif. Location.- Staff gage, lat. 36°05', long. 119°44 T , at SW corner sec. 31, T. 21 S., R. 21 E., 12 miles southeast of Stratford. Records available.- Hay 1937 to September 1938. March 1906 to September 1920 (incomplete) at several other sites. Extremes.- Maximum stage recorded during period May 1937 to September 1938, 195.5 feet June 5, 1938. Maximum amount in storage, about 1,160,000 acre-feet, June 30, 1938. 1906-38: Maximum stage probably occurred June 21, 1907 (gage height, 14.0 feet, former site and datum); lake dry or practically so for parts of 1906, 1914, 1916, 1919, 1920-22, 1924-36, and 1937. Remarks.- Tulare Lake receives water from Kings, Kaweah, and Tule Rivers during high-water periods and occasionally from Kern River, Deer Creek, and several small intermittent streams. Its boundaries have been greatly altered in recent years by the construction of levees and other reclamation work. Water reached lake from tributaries about Feb. 10, 1937, for first time since April 1923, and lake attained a stage of 192.3 feet June 16, 1937 (contents about 420,000 acre-feet). It then receded until Dec. 14, 1937, when it began to receive flow from flood of Dec. 11. It continued to rise slowly through March 1938, with occasional periods of falling stage due to breaking of levees. The spring- rise began about Apr. 15, 1938, and continued to the peak stage of June 5, 1938. The amount of water in storage continued to increase, due to more levee breaks, until June 30, 1938. Gage-height record furnished by Tulare Lake Reclamation District No. 749. Gage height, in feet, 1937 Day May June July Aug. Sept. Day May June July Aug. Sept. 1 _ 190.4 191.8 189.5 186,9 16 187.1 192.3 190,9 1S8.2 136.3 2 _ 190,7 191.8 189.4 186,8 17 187.4 192.2 190.8 188.1 186.3 3 _ 191.0 191.7 189,3 186.8 IS 137. 8 192,2 190.7 188,0 186,2 4 _ 191.2 191.7 189.2 186.7 19 188.4 192.2 190.7 187.9 186.2 e - 191.3 191.6 189 .2 186.7 20 189.0 192.2 190.6 187.8 186.2 6 _ 191.4 191.6 189,1 186.6 21 189.2 192.2 190.6 187.7 186.1 7 _ 191.6 191.5 3.89.0 186.6 22 189.4 192.2 190,5 187.6 186.1 8 _ 191.8 191.5 188.9 186.5 23 189.6 192.1 190.4 187.5 186.1 9 _ 191.8 191.4 188.8 186.5 24 189,8 192.1 190,3 187.5 186.0 10 186.0 192.0 191.3 188.7 186.4 25 190 0 192.1 190.2 187.4 186.0 11 186.1 192.1 191.2 188.6 186.4 26 190.2 192.1 190.1 187.3 186.1 12 186.4 192,2 191.2 188.5 186.4 27 190.6 192.0 190.0 187.2 186.1 13 186.5 192.2 191.1 188.4 186.4 28 190.9 192.0 190.0 187.2 186.1 14 186,6 192.2 191.0 188.4 186,4 29 191.0 191.9 189.8 187.1 186.1 15 186.8 192.2 191.0 18S.3 186.3 30 191.2 191.9 139,7 187.0 186.2 31 190.4 - 189.6 187.0 - Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 - 186.0 186.9 _ 188.3 193.4 192.6 - 195.1 193.0 192.2 191.4 2 186^ .2 186.2 188.3 193.1 192.3 195.2 193,0 192.2 S 186,2 191.4 186.9 188.5 1P2.9 192.1 195.3 193.0 192.2 191.3 4 186.2 186.2 186.9 188.6 192.7 192.1 195.4 5 186.2 I _ 193.0 192.2 191.3 186.9 188.9 192.6 192.2 *195.5 193.0 192.1 191.3 6 186.2 186.9 187.4 189.2 192.5 192.2 195.3 7 186.2 186.2 193.0 192.1 191.2 186.9 189.6 192.5 192.2 *195.1 193.0 192.1 191.2 S 186.1 185.9 186.9 187.5 190,0 Q 192.6 192.3 194.6 193.0 192.0 191.2 186.X 190.3 192.6 192.4 10 186.2 *194.2 192.9 192.0 191.2 188.1 186,0 186.9 187.7 190.5 192.6 192.4 193.7 192.9 192,0 191.2 11 186.3 186.1 186.0 187.0 187.8 190.7 192.6 192.5 193.3 12 186.1 192.9 192.0 191.1 187.0 187.9 190.9 192.6 192.5 *193.1 192.9 191.9 191.1 13 186.1 186.0 187.0 *187.9 191.0 192.6 192.5 14 193.0 192.8 191.9 191.1 186.3 186,1 186.2 187.0 188.2 191.2 192.6 192.6 192.8 192.8 15 186.4 186.1 191.9 191,1 186.4 187.1 188.3 191.5 192.6 192.8 192.8 192.8 191.8 191,1 16 186.1 186.6 187.1 188.5 191.8 192.7 192.9 192.7 192.8 17 186.4 186.0 191.8 191.1 186.7 187.1 188,6 192.1 192.7 193.0 192.8 192.7 191.8 191.0 IS 186.4 186.0 186.8 187.1 188.7 192.3 192.7 19 193.2 192.8 192.7 191.8 191.0 186.0 187.1 188.5 192.8 192.8 193.4 192.8 192.7 20 186.4 186.0 191,8 191.0 186.8 187.1 188.4 192.9 192.8 193,6 192.9 192.7 191.7 191.0 21 186.3 186.0 186.9 187.1 188.4 193,1 192.8 193.8 192.9 192.7 22 186.3 186.0 191.7 191.0 186.9 187.1 193.3 192.8 194 .O 192.9 192.6 191.7 191.0 23 186.3 186.0 186.9 187.1 188.2 193.5 192.9 24 194.2 192.9 192.6 191.6 191.0 186.0 186.9 187.1 188.2 193.6 *193.0 194.4 192.9 192.6 26 186.3 186.0 191.6 191.0 187.1 188.2 193.7 193.0 194.5 193.0 192.5 191.6 191.0 26 186.3 186,0 186,9 187.1 188.2 *193.8 192,9 194.5 193.0 192.5 191.5 190.9 27 186.3 186.0 186.9 187.1 188.2 193.7 192.8 «194.6 28 186.2 193.0 192.4 191.5 190.9 186.0 186.9 188.2 193.7 192.9 194,7 193.0 192.4 29 186.0 186.9 191,5 190.9 193.8 *193.0 194,8 193.0 192.4 191,5 190.9 30 186.0 186.9 *193.9 SI 192,9 194,9 193.0 192.3 191.4 190.9 186.2 186.9 193.7 195.0 192.3 191.4 *Levees broke, flooding additional areas. 172 TULARE -LAKE BASIN Tule River near Porterville, Calif. Location.- Water-stage recorder, lat. 36°05', long. 118°55', in NWi sec. 25, T. 21 S., R. 28 E., at highway bridge, 1 mile upstream from South Fork, and 6 miles east of Porterville. Altitude, about 580 feet. Drainage area.- 266 square miles. Records available.- my 1901 to September 1938. Average discharge.- 37 years, 142 second-feet. Extremes.- Maximum discharge during year, 11,300 second-feet Dec. 11 (gage height, 9.50 TeerT, from rating curve extended above 3,300 second-feet on basis of velocity compu tations and slope-area determination of peak discharge; minimum, 9 second-feet Oct. 1. 1901-38: Maximum discharge, 12,500 second-feet Feb. 13, 1936 (gage height, 10.55 feet), from rating curve extended above 3,700 second-feet on basis of area-vel)dty computations (supersedes that published in Water-Supply Paper 831); no flow during parts of 1934 and 1935. Remarks.- Records good. Discharge for periods of missing gage heights, July 7-10, 12, computed on basis of records for nearby stations. Several small diversions above station. Power Is developed on Middle Fork and tributaries. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May Jtroo July Aug. Sept. 1 10 15 27 98 454 872 402 785 735 196 52 26 2 9.5 14 27 100 324 3,510 402 860 760 188 48 24 3 11 14 27 106 652 3,610 435 760 760 182 46 23 4 12 15 21 98 675 2,160 466 710 735 178 43 23 6 14 16 21 96 518 1,230 908 710 685 165 42 24 6 14 17 20 91 332 950 660 685 620 157 42 25 7 14 21 19 90 284 810 560 660 600 150 42 25 a 12 22 20 88 250 963 560 685 640 140 42 24 9 12 21 26 85 365 735 600 735 520 135 42 23 10 11 21 2,200 85 362 620 600 785 500 125 40 22 11 11 23 2,880 84 542 600 620 860 483 120 37 24 12 10 28 1,800 82 560 1,580 600 950 450 115 36 23 13 10 30 545 81 379 2,190 920 1,070 417 111 36 22 14 11 28 334 79 427 1,340 760 1,230 388 105 37 21 15 12 27 254 167 373 1,010 660 1,300 365 98 38 22 16 15 27 214 134 326 860 620 1,160 359 97 37 21 17 17 27 188 150 282 1,100 640 1,010 354 96 36 22 ia 16 36 166 165 323 860 835 950 324 91 36 23 19 14 34 152 184 826 760 1,070 890 316 86 36 24 80 14 29 141 210 500 810 1,130 810 301 82 35 24 81 15 27 130 156 399 710 1,100 735 282 79 33 23 88 15 SB 123 148 348 620 1,070 685 272 72 32 22 83 14 27 147 141 326 560 1,040 735 263 71 31 21 84 14 28 134 134 332 640 1,130 760 257 68 30 21 85 12 30 120 125 316 620 1,200 785 246 71 29 21 86 11 31 114 123 306 560 920 835 236 100 29 21 87 12 30 111 120 291 500 810 835 226 84 28 21 SB 12 28 105 118 356 600 810 785 220 74 27 22 29 12 SB 102 387 _ 483 810 736 212 70 27 24 30 12 87 102 228 _ 435 890 686 200 66 27 23 31 13 100 182 - 414 - 710 - 59 26 - Second- Run-Off In Month foot-days Maximm MiniBUB Mean sore-feet 390,5 17 9.5 12,6 775 748 36 14 24.9 1,480 10,370 2,880 19 335 20,570 115,919.0 7,660 7,5 318 229,900 4,135 387 79 133 8,800 11,428 886 250 408 22,670 March...... 32,612 3,610 414 1,052 64,680 April...... 23,228 1,800 402 774 46,070 May...... 25,890 1,300 660 835 51,350 12,626 760 200 421 25,040 July...... 3,430 196 59 111 6,800 1 ,122 0*5CO 26 36. 2 2,230 684 26 21 22,8 1,3*0 Water year 1937-38...... 126,663.5 3,610 9.5 347 251,800 Peak discharge.- Dec. 10 (8 a.m.) 4,810 seo.-ft.j Dec. 11 (6 p,m.) 11,300 aeo.-ft.j Mar. 2 (6 p.m,) 11,000 see.-ft. TULARE LAKE RA.SIN 173 South Fork of Tula River near Success, Calif. Location.- Water-stage recorder, lat. 36°03', long. 118°51', in NWi sec. 4, T. 22 S., R. 29 E., 3 miles southeast of Success, and 5 miles upstream from mouth. Altitude, about 750 feet. Drainage area.- 106 square miles. Records available.- June 1930 to September 1938. Extremes.- Maximum discharge during year, 2,960 second-feet Mar. 2 (gage height, 6.75 feet;, from rating curve extended above 1,000 second-feet on basis of velocity-area studies; minimum, 0.8 second-feet Oct. 13. ' 1930-38: Maximum discharge, 3,370 second-feet Feb. 6, 1937 (gage height, 6.36 feet), from rating curve extended above 1,100 second-feet on basis of velocity-area studies; no flow at times during each year except 1938. Remarks.- Records good. Sevei^al irrigation ditches divert water above station. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.4 2.e 7.5 21 102 297 161 306 186 55 15 5 2 1.5 2.8 7,5 22 80 964 154 344 178 54 15 5 S 1.6 2.3 7.5 23 161 1,220 156 309 174 53 14 5 4 3.1 2.0 7,5 21 166 865 161 265 165 51 13 5 5 3.4 1.9 7.5 20 111 522 354 279 158 49 13 5 6 3.1 2.0 7.5 19 34 403 243 265 150 45 13 5.5 7 2.8 2.8 7.5 19 70 334 213 257 144 43 13 5 8 1.9 3.9 7.5 18 63 364 205 257 134 40 13 5 9 1.6 5.5 8 17 97 282 208 257 129 38 13 4.8 10 1.4 5 300 16 90 261 203 257 125 37 11 4.8 11 1.4 5 276 16 118 257 203 271 121 35 11 4.5 12 1.3 8 267 3.6 122 471 210 288 120 33 10 4.4 13 1.2 6.5 99 16 90 768 294 303 114 32 9.5 3.6 14 1.3 6.5 62 16 111 538 271 331 107 30 9 3.4 15 3.1 6.5 47 53 118 437 260 338 100 29 9.5 3.4 16 3,6 6.5 39 £18 97 429 ' 257 328 96 28 9.5 3.4 17 3.6 7 35 38 82 494 257 300 90 28 9.5 3.9 18 3.1 12 31 41 94 382 279 285 87 25 9.5 4.2 19 2.8 S 28 49 216 334 325 268 84 25 9.5 4.2 £0 1.9 7.5 26 65 152 354 334 254 84 24 8.5 4.2 21 1.8 7 25 39 130 300 322 237 82 23 8 4.0 as 1.4 6.5 24 3764 113 262 315 223 79 22 8 3,9 as 1.3 6.5 32 102 251 309 221 74 20 8 3.9 24 1.3 6.5 27 31 100 260 344 226 69 20 8 4.0 25 1.4 7.5 24 29 99 246 364 223 67 20 1 4.2 26 1.4 8 24 27 90 226 312 226 63 22 6.5 4.2 27 1.3 8 24 87 88 208 282 226 60 23 6.5 3.9 28 1.4 7.5 23 27 104 203 271 221 60 21 6 4.2 29 1.5 7.5 22 74 ., 190 276 215 59 18 6 4.5 30 1.5 7.5 22 57 _ 176 347 200 58 17 5.6 4.4 31 1.8 - 21 49 - 165 - 190 16 5.5 Seoond- Run-off in Month foot-days Maximum Minimum Mean acre-feet -i n-i 61 .2 3.6 1,2 1.97 X*3X 177,0 12 1.9 5 90 351 40 Q 1,546.0 300 7.5 XP V 3,070 34,811.9 2,000 0.4 95.4 69,060 936 74 16 109*30 S 1,850 3,060 216 63 6,050 Karen...... 12,453 1 *364820 165 402 £4 *700 April ...... Y ^890 154 263 isjeso May...... 8 «1S8 344 190 264 16,240 3,217 186 58 107 6,380 July...... 976 56 16 31.5 1 940 303,5 15 5.6 9 79 602 130.5 5.5 3.4 4.36 269 Water year 1937-3 38,927.2 1,220 1.2 107 77,210 Peak discharge.- Mar. 2 (5:30 p.m.) 2,960 sec.-ft.j Mar. 3 (6:30 p.m.) 1,660 see.-ft.; Mar. 13 (8|30 a.m.] 1,220 see.-ft. 174 TULARE LAKE BASIN Kaweah River near Three Rivers, Calif. Location.- Water-stage recorder, lat. 36°24', long, 118°57', In SWi sec. 33, T. 17 S., R. B8 E., 2i miles downstream from mouth of South Fork and 3 miles southwest of village of Three Rivers. Altitude, about 620 feet. Drainage area.- 520 square miles. Records available.- April 1903 to September 1938. Average discharge.- 35 years, 562 second-feet. Extremes.- Maximum discharge during year, 33,300 second-feet Dec. 11 (gage height, 16.0 feet, from floodmarks), from rating curve extended above 6,000 second-feet on basis of velocity-area studies; minimum, 44 second-feet Oct. 23. 1903-38: Maximum discharge, that of Dec. 11, 1937; minimum, 8.5 second-feet Sept. 19, 1934. Remarks.- Records excellent except those for Dec. 11-16, which were computed from a dls- charge graph based on partial recorder graph, peak stage, and occasional staff gage readings and are fair. Flow regulated by diversions for Irrigation above station and by power developments on Middle and East Forks. Discharge, In second-feet, water year October 1937 to Septesber 1938 Day Dot. HOT. Dao. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 62 66 69 317 882 1,830 1,120 2,100 4,640 1,680 546 163 2 63 66 71 354 735 5,390 1,180 2,370 4,960 1,600 519 152 3 65 65 72 372 1,220 5,300 1,270 2,100 5,130 1,600 476 149 4 71 69 72 334 1,180 3,020 1,360 2,050 4,960 1,400 428 145 B 71 65 71 313 1,000 2,180 1,SSO 2,100 4,330 1,360 401 141 6 69 65 71 294 S70 1,960 1,430 2,050 4,180 1,400 409 138 t 68 66 71 282 820 1,720 1,330 2,050 3,890 1,400 401 132 a 66 68 71 276 775 1,760 1,400 2,230 3,660 1,400 394 122 9 66 69 84 264 1,150 1,500 1,540 2,420 3,750 1,300 372 118 10 65 69 5,870 258 1,090 1,360 1,600 2,570 3,540 1,240 323 114 11 63 71 10,800 258 1,640 1,430 1,680 3,020 3,210 1,120 298 111 12 62 S9 5,600 252 1,300 4,060 1,680 3,400 2,730 978 279 106 13 62 80 1,900 247 1,060 4,180 1,920 4,180 2,370 922 276 103 14 69 76 1,000 247 1,150 2,620 1,640 4,960 2,420 1,030 265 101 16 71 77 800 410 1,060 2,280 1,540 4,960 2,620 1,060 260 98 16 72 76 670 347 978 2,230 1,570 4,480 2,780 1,030 238 97 17 72 86 578 432 895 2,370 1,800 3,750 2,680 978 226 97 18 69 96 537 460 1,010 1,880 2,370 3,820 2,420 978 225 101 19 69 82 485 436 1,330 1,760 2,960 3,400 2,140 960 222 106 20 68 79 440 413 1,06O 1,920 3,020 2,960 1,840 922 209 101 21 65 77 409 372 978 1,640 3,020 2,620 1,680 870 199 92 22 63 76 379 368 950 1,500 3,140 2,620 1,840 1,010 199 91 23 56 74 485 354 922 1,430 3,140 3,140 2,100 895 199 88 24 58 74 405 344 950 1,760 3,280 3,540 2,370 820 194 84 25 60 76 372 334 922 1,570 *3,300 3,750 2,420 785 196 84 26 60 74 361 340 S95 1,400 *2,500 4,030 2,370 951 186 86 27 59 74 347 334 870 1,300 2,320 4,180 2,280 795 178 86 28 59 72 337 344 1,030 1,330 2,370 3,890 1,960 670 169 104 29 62 71 323 497 1,270 2,420 3,610 1,540 660 186 122 30 63 68 320 432 1,180 2,280 3,680 1,540 614 199 108 31 65 317 413 1,160 4,180 600 176 Seoond- Run-off In Month foot-days Vaytpmpfl Minimum Mean acre-feet Got 2,012 72 66 64.9 3,990 Ho* 2,206 96 59 73.5 4,380 Dec 33,387 J.0,800 69 1,077 66,220 C 368,703 13,000 56 1,010 731,300 Jan uarr * . . * 10,698 497 247 345 21,220 Fob 28,722 1,640 735 1,026 56 ,970 Mar 66 ,280 5,390 1,150 2,138 131,600 Apr 11...... 62,060 3,300 1,120 2,069 123,100 May 100,210 4,960 2,050 3,233 198,800 Jun 88 ,370 5,130 1,540 2,946 176,300 Jul 32,918 1,680 600 1,062 65,290 Auguat...... 8,827 546 169 286 17,610 Sep 3,338 163 84 111 6,620 «atsr year 1937-3 439,028 10,800 56 1,203 870,900 Peak discharge.- Dec. 10 (8 a.m.) 11,900 sec.-ft.j Dec. 11 (3 p.m.) 33,300 sec.-ft.j Mar. 2 (4r30 p.m.) 14,600 sec.-ft. *0age height missingj discharge computed on basis of records for North Pork at Kaweah River at Kaweah. TULARE LAKE BASIN 175 North Fork of Kaweah River at Kaweah, Calif. Location.- Water-stage recorder, lat. 36°29', long. 118°55', in SEi sec. 34, T. 16 S., R. 28 E., li miles upstream from Mannikln Creek, !£ miles north of Kaweah, and 3 miles upstream from mouth. Altitude, about 1,080 feet. Drainage area.- 128 square miles.. Records available.- October 1933 to September 1938. October 1910 to October 1933 at site 1 mile downstream. Average discharge.- 27 years (1911-38), 96.9 second-feet. Extremes.- Maximum discharge during year, 8,290 second-feet Dec. 11 (gage height, 11.0 feet), from rating curve extended above 4,000 second-feet on basis of velocity-area studies; minimum, 7.5 second-feet Oct. 26 (gage height, 1.62 feet). 1910-38: Maximum discharge, that of Dec. 11, 1937; no flow for many days during July to October 1924. Remarks.- Records good except those for periods of partial gage-height record, Jan. 5- 14, Mar. 26, 27, which were computed on basis of partly estimated gage heights and are fair. Several small diversions for Irrigation above station. Discharge, In second-feet, water year October 1957 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 8.5 9.5 12 S3 278 670 510 565 652 150 43 20 2 9 9.5 12 100 194 1,430 525 607 646 144 41 20 3 9 9.5 12 116 290 1,890 575 545 634 139 40 20 4 11 9.5 12 106 300 1,140 607 540 585 135 38 20 6 11 9.5 12 100 243 835 752 555 530 127 37 20 6 11 9.5 12 93 194 700 634 550 490 120 36 20 7 9.5 10 12 86 178 612 560 560 467 111 35 20 8 9,5 10 12 83 164 612 510 607 444 106 35 19 9 9.5 10 18 80 290 545 462 646 416 103 35 18 10 9.5 10 1,280 74 278 520 444 682 396 98 34 18 11 9 11 2,390 74 578 515 485 765 372 92 32 17 12 9 17 1,100 74 396 1,670 495 835 356 89 31 16 13 9 14 351 74 300 1,730 535 942 324 84 30 16 U 9.5 13 229 74 317 1,040 476 1,060 297 80 30 15 16 10 14 189 143 307 835 444 1,020 281 76 30 15 16 10 14 160 129 293 800 444 942 275 74 30 15 17 10 16 147 139 278 842 500 842 263 71 29 15 18 10 16 129 150 317 682 646 807 251 68 29 16 19 10 15 119 141 444 646 786 739 239 67 29 17 20 9.5 14 111 129 360 706 793 668 330 64 28 16 21 9 13 104 122 335 634 800 590 230 59 27 14 22 9 14 99 124 328 585 831 590 210 57 27 14 23 9 12 121 119 331 570 807 646 202 55 26 14 24 9 13 104 116 335 676 856 682 194 53 25 14 25 9 14 93 118 324 624 863 706 190 52 24 14 26 8 14 90 118 324 565 658 726 180 56 34 14 37 8 14 89 119 324 515 624 720 175 67 24 14 28 8 14 86 126 404 535 618 670 168 56 22 16 29 8.5 13 86 171 530 652 596 163 52 22 18 30 8.5 12 86 149 500 629 585 156 49 21 16 31 9 88 149 495 624 46 21 Second- Month foot-dftys Mmdfflujn Mini* Mean *£££.? Oct 288.5 11 8 9.31 572 Hoi 374.0 17 9.5 12.5 742 D«fl 7,346 2,390 12 237 14,570 C 80,531.5 4,190 7 220 169,300 Jan nary 3,484 171 74 112 6,910 Fat 8,704 578 164 311 17,260 Mar 24,649 1,890 495 795 48,890 Apl 18 ,501 863 444 617 36,720 May 21,602 1,060 540 697 42,800 Jun 10,016 652 156 334 19,870 Jul 2,600 150 46 83,9 5,160 Aufi 935 43 21 30.2 1,850 Sej 501 20 14 16.7 994 1ater year 1937-3 99,009.5 2,390 8 271 196,400 Peak dlsohai-fze.- Deo. 10 (10 a,m. 2,760 see.-ft.j Dee, 11 (3 p.m.) 8,290 see.-ft.} Mar. 2 (6i30 p.m.) 2,930 aee.-ft. 176 TULARE LAKE BASIN Kings River above North Fork, Calif. Location.- Water-stage recorder, lat. 36°52', long. 119°07', in N4 sec. 27, T. 12 S., R. 26 E. (unsurveyed), 1 mile upstream from North Fork of Kings River and 10 miles southeast of Trimmer. Altitude, about 1,020 feet. Drainage area.- 956 square miles. Records available.- October 1931 to September 1938. March 1927 to December 1928 at site hair a mile downstream. Extremes.- Maximum discharge during year, 42,000 second-feet Dec. 11 (gage height, 12.02 feet), from rating curve extended above 10,000 second-feet on basis of velocity-area studies; minimum, 136 second-feet at times during Dec. 5-9 (gage-height, 0.85 foot). 1927-28; 1931-38: Maximum discharge, that of Dec. 11, 1937; minimum, 79 second- feet Oct. 13, 1934 (gage height, 0.54 foot). Remarks.- Records good except those for period of doubtful gage-height record, July 12- 26, which were computed on basis of partial recorder graph for high stages and rec ords for Kings River at Piedra and are fair. No diversions. Small amount of water released occasionally from Hume Lake. Gage-height record collected in cooperation with Kings River Water Association and San Joaquin Light & Power Corporation. Discharge, In seeond-faet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Kar. Apr. May June July Aug. Sept. 1 178 149 147 390 912 1,930 1,070 3,700 12,800 6,200 3,240 1,050 2 174 149 149 415 745 5,200 1,160 3,940 14,100 6,360 3,060 923 s 174 147 151 430 1,130 5,430 1,350 3,460 16,000 6,360 2,890 860 4 1S5 145 143 400 1,030 3,700 1,630 3,460 16,500 5,750 2,570 821 6 183 143 141 37-6 913 2,600 2,200 3,580 13,600 5,600 2,350 765 6 180 141 141 354 892 2,050 1,640 3,700 12 ,800 5,750 2,420 713 7 174 145 141 354 829 1,630 1,570 3,940 12,300 5,900 2,500 660 S 169 145 138 340 773 1,440 1,760 4,330 11,400 6,050 2,500 612 9 165 145 153 322 1,390 1,260 2,110 4,590 11,400 5,900 2,220 580 10 163 147 3,340 322 1,350 1,170 2,260 5,430 11,400 5,750 1,840 549 11 161 153 14,600 300 2,760 1,200 2,480 6,620 10,600 5,160 1,670 558 12 159 200 5,990 296 1,670 4,670 2,650 7,370 8,080 4,500 1,560 558 13 159 231 2,120 292 1,240 6,040 2,580 8,640 6,360 4,050 1,510 532 14 169 207 1,310 292 1,250 3,820 2,140 11,000 6,520 4,300 1,420 512 16 178 187 1,020 430 1,100 2,760 2,050 12 ,300 7,900 4,750 1,320 496 16 174 169 871 390 960 2,560 2,180 11,400 9,210 5,300 1,240 484 17 172 176 780 465 836 2,540 2,740 9,210 9,020 5,000 1,170 476 18 165 183 698 460 906 2,020 4,070 8,830 7,900 4,750 1,110 500 19 161 169 638 445 1,090 1,800 5,430 8,080 6,860 4,500 1,070 562 SO 155 172 590 415 944 2,120 6,040 6,860 5,900 4,500 1,010 524 Si 151 172 560 400 899 1,770 6,360 5,430 5,160 4,650 954 492 22 149 167 525 410 864 1,560 6,520 5,280 6,600 4,500 946 476 23 147 161 555 381 864 1,400 6,520 6,040 6,860 4,500 986 464 24 147 161 485 372 899 1,570 6,690 7,200 8,450 4,300 1,010 444 25 147 163 470 368 878 1,400 6,040 8,260 9,600 4,400 1,010 428 26 145 161 455 368 843 1,290 5,000 9,400 10,000 4,750 1,020 410 27 145 159 440 363 829 1,220 4,460 9,600 9,800 5,020 1,100 392 23 145 155 420 395 1,O10 1,250 4,720 9,600 8,450 3,840 962 584 28 145 149 415 460 _. 1,210 5,140 9,020 6,050 3,730 986 708 30 143 149 415 410 n 1,120 4,330 9,400 5,750 3,620 1,240 626 31 147 - 425 435 - 1,070 - 10,600 - 3,520 1,320 " Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet 5,009 185 143 162 9,940 4,900 231 141 163 9,720 38 ,426 14,600 138 1,240 76,220 740,390 14,600 138 2,028 1,469,000 11,850 465 292 382 23,500 29 ,806 2,760 745 1,064 59,120 March...... 70,800 6,040 1,070 2 284 140,400 April...... 104,880 6,690 1,070 3,496 208,000 May...... 220,170 12,300 3,460 7,102 436,700 286,370 16,500 5,160 9,546 568,000 153 #260 6,360 3,520 4 944 304,000 50,204 3,240 946 1 , 19 99,580 September...... 17,759 1,050 392 592 35,220 Water year 1937-J 993,434 16,500 138 2,722 1,970,000 Pealc discharge.- Dec, 11 (4 p.m.) 42,000 seo.-ft.j June S (2 a.m.) 18,000 sec,-ft.j June 4 2 a.m.) 19,700 sec.-ft. TULARE LAKE BASIN 177 Kings River at Piedra, Calif. Location.- Water-stage recorder, lat. 36°49'02", long. 119°23'08", in NWi sec. 8, T. 13 S., R. 24 E., half a mile below highway bridge at Piedra and 12 miles northeast of Sanger. Altitude, about 500 feet. Drainage area.- 1,694'square miles. Records available.- September 1935 to September 1938. Average discharge.- 43 years, 2,329 second-feet. Extremes.- Maximum discharge during year, 80,000 second-feet Dec. 11 (gage height, 19.94 fee.t), from rating curve extended above 30,000 second-feet on basis of velocity-area studies; minimum, 167 second-feet Nov. 6 and 7. 1895-1938: Maximum discharge, that of Dec. 11, 1937: minimum, 67 eecond-feet Oct. 3-, 1924. Remarks.- Records excellent. All diversions returned to river above station. Flow slightly regulated by storage! on Tenmile and Mill Flat Creeks and operation of one power plant on North Fork of Kings River. Gage-height record collected in cooperation with Kings River Water Association. Discharge, In second-feet, water year October 1937 to September 1933 Day Dot. HOT. D«o. Jan. Feb. Mar. Apr. May June July Aug* Sept. 1 208 183 196 784 2,590 4,800 2,S10 5.760 19 ,700 9,060 3,820 1,360 2 203 187 192 832 2,10O 16,200 2,930 5,950 21 ,700 9,320 3,610 1,150 S 201 187 196 1,040 3,140 17,900 3,330 5,380 22,600 9,320 3,400 1,080 4 206 183 194 922 3,420 10,300 3,700 5,380 22,800 8,320 3,020 950 S 218 180 190 838 2,810 6,790 5,000 5,760 19,800 7,840 2,780 920 6 213 176 187 790 2,210 5,V60 3,850 5,950 18,400 7 ,840 2,780 890 7 211 178 185 748 1,940 4,740 3,550 6,370 18,000 8,080 2,840 835 8 208 185 185 725 1,740 4,740 3,700 6,790 17,200 8,320 2,840 755 9 203 185 194 695 3,070 4,000 4,240 7,480 18,000 8,080 2,600 708 10 201 185 9,190 675 3,420 3,550 4,400 8,200 17,200 7,620 2,280 662 11 196 192 37,800 665 11,700 3,480 4,660 10,100 16,400 6,960 2,080 640 12 192 213 12,900 645 5,580 11,900 4,830 11 ,200 13,500 5,960 1,900 662 IS 194 274 4,120 635 3,350 14,200 5,000 13,500 10,400 5,240 1,800 640 14 196 286 2,680 635 3,800 7,960 4,240 17,400 10,700 5,600 1,720 600 IS 213 253 2,160 1,170 3,140 6,160 4,080 18,800 12 ,500 6,160 1,600 600 16 215 259 1,840 1,080 2,620 5,760 4,240 17,400 14,600 6,560 1,520 560 17 215 225 1,600 1,000 2,210 6,160 4,920 14,200 14,600 6,360 1,400 560 18 213 235 1,460 1,140 2,210 4,920 6,680 13 ,900 13,200 5,960 1,290 560 19 203 238 1,300 1,110 5,040 4,400 8,460 12,500 11,000 5,780 1,320 620 20 199 223 1,180 1,110 2,880 5,000 8,980 10,300 9,060 5,960 1,860 662 21 192 220 1,080 916 2,440 4,490 9,500 8,720 8,080 5,600 1,150 6OO 82 185 220 964 910 2,260 3,920 10,100 8,720 8,800 5,600 1,150 560 S3 183 215 1,040 880 2,160 3,620 10,100 10,600 10,400 5,420 1,180 540 24 183 215 1,000 820 2,100 4,490 10,100 12,800 12 ,800 5,240 1,220 540 25 178 220 922 790 2,040 3,920 8,980 14,200 13 ,900 5,240 1,180 620 26 183 21S 880 790 1,940 3,550 7,240 15,700 14,200 5,780 1,220 602 27 178 215 862 790 1,840 3,260 6,790 16,100 13,900 7,660 1,260 485 28 178 208 826 927 2,160 3,330 7,240 16,100 12,800 4,900 1,180 502 89 176 203 802 1,510 3,260 7,480 15 ,000 9,060 4,420 1,180 920 SO 180 199 790 1,08O 2,990 6,580 15,700 8,320 4,260 1,360 808 31 178 820 1,000 2,870 17,900 4,100 1,660 Seoond- Mmrtffft^M Run-off In Month foot-days M1n1mwi Mean acre-feet Oot 6,102 218 176 197 12,100 Hou 6,360 286 176 212 12,810 Dec 87,935 37 ,800 185 2,837 174,400 C 1,245,465 37,800 176 3,412 2,470,000 Jan uary 27,652 1,510 635 892 54,850 Pet 85,910 11,700 1,740 3,068 170,400 Mar 188 ,420 17,900 3,870 6,078 378,700 Apr 177,610 10,100 2,810 5,920 352,800 Xa, 363,860 18,800 5,380 11,410 701,900 Jun 433,620 22,800 8,080 14,450 860,100 Jill 202,560 9,320 4,100 6,534 401,800 £* 59,500 3,820 1,150 1,919 118,000 Sep 21,391 1,360 485 713 42,430 1 ater year 1937-3 1,650,920 37,800 176 4,523 3,275,000 Peak discharge.- Dec. 11 (4:30 p.m.) 80,000 sec.-ft.i Har. 2 (5 p.m.) 32,500 see. -ft.) June 4 (l a.m. 7 SV.'SOO sec. -ft. 178 TULARE LAKE BASIN North Fork of Kings River near Cliff Camp, Calif. Location.- Water-stage recorder, lat. 37°00', long. 118°59', in NWi sec. 12, T. 11 S., R. 27 E., at Cliff Camp Bridge, 1 mile northwest of Cliff Camp and 2.3 miles downstream from Woodchuelc Creek. Altitude, about 6,150 feet. Drainage area.- 174 square miles. Records available.- November 1922 to September 1938. August 1921 to November 1922 at site 1 mile upstream. Average discharge.- 14 years (1921-32, 1933-35, 1937-38), 338 second-feet. Extremes.- Maximum discharge during year, 14,000 second-feet Dec. 11 (gage height, 18.0 feet, from floodmarks), from rating curve extended above 4,500 second-feet logarithmi cally and on basis of velocity-area studies; minimum, 5.5 second-feet Oct. 2 (gage height, 2.52 feet). 1921-38: Maximum discharge, that of Dec. 11, 1937: minimum, 0.6 second-foot Dec. 30, 1930. Remarks._- Records good except those for period of missing gage heights, Dec. 11 to Jan. 26 (computed on basis of partial graph, recorded peak stage and records for stations on Kings and Merced Rivers), and those for periods of ice effect, Jan. 29, 30, Feb. 2 to Mar. 3 (computed on basis of one discharge measurement, weather records, and rec ords for nearby streams) which are fair. No diversions. Gage-height record and re sults of 11 discharge measurements furnished by San Joaquin Light & Power Corporation. Rating table, water year 1937-38 (gage height, in feet, and discharge, in aeoond-feet) 2,4 3.8 3.6 67 5.6 490 8,5 1,770 13.0 6,050 2.6 6.4 3.S 91 6,0 630 9,0 2,070 13.5 6,710 2,8 10.6 4.0 118 6.5 820 9.5 2,420 3.0 17 4.4 185 7.0 1,020 10.0 2,810 3,2 28 4.8 264 7.5 1,245 11.0 3,720 3,4 45 5.2 365 8.0 1,480 12.0 4,810 Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. HOT. Dee. Jan. Pet). Mar. Apr. Hay June July Aug. Sept. 1 5.5 8 8.5 \ 92 150 167 740 5,050 2,140 532 83 2 5.6 7.5 9,5 105 600 223 700 5,290 2,210 304 66 3 5.5 7 9 105 400 299 612 5,410 2,010 269 56 4 6 7 8 100 332 354 720 5,170 1,770 229 50 6 6.5 6.5 7.5 100 273 301 900 4,470 1,710 204 45 6 6,5 7 S 95 242 246 1,020 4,360 Ir710 200 41 7 7 8 7.5 90 215 255 1,240 4,250 1,710 198 39 8 7 7.5 7.5 95 191 343 1,430 4,360 1,710 187 35 9 7 7.5 39 105 169 443 1,530 4,360 1,590 165 32 10 7 8.5 1,210 110 160 472 1,830 4,140 1,380 140 30 11 7 9.5 6,620 105 180 525 2,280 3,520 1,200 117 32 12 6.5 10 100 542 525 2,570 2,890 980 108 30 13 7 9.5 35 100 314 401 3,150 2,350 980 101 28 14 8.5 12 95 242 329 3,920 2,730 1,090 94 27 16 9 11 95 220 348 4,030 3,330 1,160 36 26 16 8.5 10 90 251 455 3,520 3,620 1,110 79 26 17 8 15 90 223 700 3,060 3,420 1,000 75 26 18 7.5 11 95 198 1,130 2,970 2,970 940 72 28 19 7 10 100 194 1,430 2,570 2,350 900 67 38 20 6.5 13 loo 225 1,650 2,010 1,950 800 63 32 >SOO 21 6,5 13 loo 196 1,950 1,770 1,890 682 58 28 82 6.6 11 95 178 2,010 2,010 2,280 720 58 26 23 6 11 95 165 2,010 2,650 2,810 648 58 24 24 6 13 100 164 1,830 3,150 3,330 578 59 22 25 6 11 ' 100 168 1,340 3,420 3,240 709 57 20 26 6 11 104 95 157 1,060 3,720 3,150 1,510 56 20 27 6 10 98 95 162 1,20O 4,140 2,970 1,090 56 20 28 6 9.6 95 120 180 1,340 3,820 2,350 612 52 84 29 6 9 97 _ 171 1,240 3,720 1,830 525 83 62 SO 6 8.5 97 - 157 900 4,030 2,010 440 101 47 31 7 - 9B - 152 ~ 4,680 - 386 130 ~ Second- Run-off In Month foot -days Maximum Minimum Keen acre-feet 207,0 9 5.6 6r68 411 292.5 15 6.5 9.75 680 13,934.5 6,620 7.6 450 27,640 2,711 87»5 5,380 2,767 120 90 98.8 5,490 ftrtO March ...... 7,070 500 150 fifxi 14,020 April...... 25,476 2,010 167 849 50,530 May...... f"7 j8l2 4,680 612 2,610 154,300 XOlf 850 5,410 1,830 3,395 July...... 2 2lO 386 1,161 71 Peak dlBttharCT.- Dee. 11 (about noon) 14,000 see.-ft.j June 2 (7i30 p.m.) 6,990 seo.-ft.j June 3 (7 p.m.) 7,270 seo ,-tt. TULA.RE LAKE BASIN 179 North Fork of Kings River below Rancheria Creek, Calif. Location.- Water-stage recorder, lat. 36°56', long. 119°00', In SEi sec. 34, T. 11 S., R. 27 E., 1 mile upstream from Balch diversion dam and 1 mile downstream from Rancheria Creek. Altitude, about 4,150 feet (revised). Drainage area.- 225 square miles. Records available.- March 1927 to January 1938. Station destroyed by flood of Dec. 11, 1937. Extremes.- Maximum discharge during period, 21,000 second-feet Dec. 11 (gage height, 23 feet, from floodmarks), from computation of peak flow over Balch diversion and after- bay dams; 1 and 7 miles downstream respectively, from station; minimum, 14 second- feet Dec. 6-8 (computed on basis of discharge measurement and records for station near Cliff Camp). 1927-38: Maximum discharge, that of Dec. 11, 1937; minimum, 5 second-feet Aug. 2$ Remarks.- Records good except -hose for periods of missing gage heights, Oct. 3-12, Nov. 7, 8, 10-15, Dec. 1 to Jan. 31, which were computed on basis of partial graph, recorded peak stage, estimates furnished by San Joaquln Light & Power Corporation, and records for nearby streams and are fair. No diversion. Gage-height record and results of three discharge measurements furnished by San Joaquin Light & Power Corporation. Discharge, In second-feet, water year October 1937 to September 1958 Day Oct. HOT. Dec. Jan. Peb. Mar. Apr. *»7 June July Aug. Sept. 1 15 16 16 2 15 16 15 3 15 16 18 IV 16 16 6 IV 15 15 6 18 16 14 8'? 18 16 14 18 16 14 9 IV 16 100 10 IV 17 1,500 11 16 19 9,000 12 16 20 13 16 20 14 18 22 16 19 21 16 19 20 17 18 22 18 17 26 19 16 20 20 16 22 21 16 23 > 450 22 15 21 23 15 21 24 15 21 25 15 23 26 15 20 27 15 20 28 15 20 29 15 18 SO 15 17 31 16 Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet Oct 505 19 15 16.3 1,000 Va\ 576 26 15 19.2 1,140 Dec 19,722 9,000 14 636 39,120 C alendar year Jar 4,340 140 8,610 Fet Max 4PI 11...... **) Jui Jill tot B«l Phe perlc 49,870 180 TULARE LAKE BASIN Dinkey Creek at mouth, Calif. Location.- Water-stage recorder, lat. 36°55', long. 119°08', in sec. 3, T. 12 S., R. 26 E. (unsurveyed), half a mile upstream from mouth. Altitude, about 1,310 feet. Drainage area.- 136 square miles. Records available.- January 1920 to November 1937 (station destroyed by flood of Dec. 11, 1937). Average discharge.- 16 years (1921-37), 180 second-feet. Extremes.- 1920-37: Maximum discharge, 4,320 second-feet Feb. 13, 1937 (gage height, 11.67 feet), from rating curve extended above 1,100 second-feet; minimum daily dis charge, 0.9 second-foot Aug. 26-30, 1931. Remarks.- Records fair. No diversion above station. Gage-height record and results of Tour discharge measurements furnished by San Joaquin Light & Power Corporation. Discharge, In aeoond-feet, water year October 1957 to September 1958 Day Oct. HOT. Dec. Jan. Fob. Mar. Apr. May June July Aug. Sept. 1 10 11 2 10 11 3 10 11 4 11 10 5 12 10 6 12 10 7 12 11 8 12 12 9 12 12 10 12 11 11 12 14 12 12 24 13 12 16 14 13 15 15 14 18 16 14 15 17 13 16 18 12 22 19 12 17 20 11 15 21 10 16 82 10 16 23 10 14 24 10 14 25 10 16 26 9.5 15 27 9.5 14 28 9.5 14 29 9,5 13 SO 9.5 13 31 10 Seoond- Run-off in Month foot-daya lfa-rti.mil Minimum Mean acre-feet 345,6 14 9.5 11.1 685 426 24 10 14,2 845 March...... Jun July...... Ausuat...... Sep Water year TULARE LAKE BASIN 181 Los Gatos Creek near Coalinga, Calif. Location.- Water-stage recorder, lat. 36°13', long. 120°27', in SWi sec. 4, T. 20 S., R. I5~E7, at mouth of canyon, 3 miles downstream from Diaz Creek, and 74 miles northwest of Coalinga. Altitude, about 1,000 feet. Drainage area.- 105 square miles. Records available.- October 1931 to September 1938. Extremes.- Maximum discharge during year, 4,520 second-feet Feb. 11 (gage height, 6.23 reef, well gage), from rating curve extended above 150 second-feet on basis of velocity-area and intake drawdown studies; minimum, probably lass than 0.1 second- Toot at times. 1931-38: Maximum discharge, that of Feb. 11, 1938; no flow during parts of nearly every year. Remarks.- Records poor. No diversion or regulation above station. Discharge, In second-feet, water year October 1937 to September 1938 Day oot. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 *0.1 0.2 0 3 0.5 220 222 42 18 4.7 2.4 0.6 0.3 2 .1 .2 3 .6 88 821 40 17 4.0 2.1 .6 .3 S .1 .2 3 .6 296 692 39 16 3.7 1.8 .6 .3 4 .1 .2 3 .5 194 302 37 15 3. 1.8 .6 .3 S .1 .2 3 .5 117 190 36 14 3. 1.8 .6 .3 6 ,1 .2 3 .5 80 132 35 12 3. 1.6 .6 .3 7 ,1 .2 3 .5 53 106 34 12 3. 1.6 .6 .3 e .1 .2 3 .5 33 100 32 12 3. 1.4 .6 .3 9 .1 .2 6 .5 227 77 31 12 3.1 1.2 .6 .2 10 .1 .2 5 .5 386 60 31 11 3.4 1.0 .6 .2 11 .1 .2 349 .5 1,170 59 30 10 3.7 1.0 .6 .2 12 .1 .2 49 .5 219 305 29 9.5 3.7 1.0 .5 .2 13 .1 .2 31 .5 127 376 30 9.5 3.4 .9 .4 .2 14 .1 .2 14 .5 206 217 26 9 3.1 .9 ,4 .2 15 .1 .2 7.5 22 131 168 24 9 2.8 .9 .4 .2 16 .1 .2 3.4 2.9 95 142 24 9.5 2.6 .9 .5 .2 17 .1 .3 1.6 38 75 124 22 10 2.6 .8 .5 .3 18 .1 .3 1.0 31 77 109 21 9 2.6 .8 .5 .3 19 .1 .3 .6 37 72 102 21 9 4.0 .6 .5 .3 20 .1 .3 .5 45 54 92 19 9.5 7,5 .6 .5 .3 21 .1 .3 .5 31 48 82 18 S.5 6 .6 .3 .3 22 .1 .3 .5 28 43 77 17 8 5 .6 .3 .3 28 ,1 .3 .6 24 40 72 17 7.5 4.3 .6 .3 .3 24 .1 .3 .5 23 38 68 17 7 3.7 .6 ,3 .3 25 .1 .3 .5 21 35 64 17 6.5 3.4 .6 .3 .3 26 .1 .3 .5 20 33 56 16 6 3.1 .8 .3 .4 27 .1 ,3 .5 20 31 53 16 6 2.6 .9 .3 .4 28 .1 .3 .5 35 125 50 15 6 2.4 .8 .3 ,4 29 ,1 .3 .5 53 _ 48 18 6 2.4 .8 .3 .4 SO .1 .3 .5 40 -, 45 19 6 2.8 .8 .3 .4 SI .1 - .5 135 - 43 5 .6 .2 Second- Run-off In Month foot-daya Maximum Minimum Mean acre-feet 3.1 0.1 0.1 0.10 6.1 7.4 .3 .2 .25 15 466,7 349 .3 15.1 926 3,009.9 349 .1 8.49 6,150 613 ! 135 .5 154* 4,318 1,170 31 8^560 March...... 5,054 43 X63 10,020 April...... 42 15 25*8 Key...... 305.5 IS 5 9 »85 606 106.7 7.5 2.4 3,56 212 July...... 2.4 .6 1 .06 65 14^0 6 .2 .45 28 8.7 .4 .2 .29 17 Water year 1937-.S&t...... 11,703.0 1,170 .1 32.1 23,210 Peak discharge.- Feb. 11 (3 a.m.) 4,520 sec.-ft.; Feb. 28 (12 p.m.) 2,120 sec.-ft.- Mar. (7 a.m.)1,670 sec.-ft. *Gage height missing} discharge estimated. 182 SAN JOAQUIN RIVER BASIN SAN JOAQUIN RIVER AND TRIBUTARIES ABOVE FRESNO RIVER San Joaquln River above Big Creek, Calif. Location.- Water-stage recorder, lat. 37°15'00", long. 119°19'10", In HWi sec. 11, T. 8 S., k. 24 E., 3 miles upstream from mouth of Big Creek. Altitude, about 2,500 feet. Drainage area.- 1,042 square miles. Records available.- March 1922 to September 1938. Average discharge.- 13 years (1925-38, period since diversion began through Ward Tunnel), 1,283 second-feet. Extremes.- Maximum discharge during year, 52,500 second-feet Dec. 11 (gage height, 24.05 feetj, from rating curve extended above 14,000 second-feet on basis of velocity-area studies; minimum, 99 second-feet Oct. 30, Nov. 6 (gage height, 6.82 feet). 1922-38: Maximum discharge, that of Dec. 11, 1937; minimum, 52 second-feet Sept. 24, 25, 1931. Remarks.- Records good except those for period of missing gage heights, Oct. 8-12, which were interpolated and are fair. Flow regulated by large diversions and storage on South Fork of San Joaquin River and tributaries. Gage-height record and results of discharge measurements furnished by Southern California Edison Co. Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. MOT. Dee. Jan. Fob. Mar. Apr. May June July Aug. Sept. 1 104 106 130 427 960 2,680 1,600 3,830 14,400 8,790 2,940 547 8 104 106 126 530 790 7,380 1,690 3,690 16,100 8,970 2,840 606 3 104 104 130 555 1,230 3,690 2,140 3,430 15,100 8,480 2,640 506 4 109 102 125 506 985 2,440 2,580 3,310 16,500 7,550 2,090 446 6 116 101 121 474 860 1,940 2,880 3,690 13,300 7,110 1,930 427 6 112 99 119 438 860 1,720 2 r140 3,970 13,000 6,900 1,520 408 7 110 102 119 427 836 1,560 1,980 4,270 13,700 6,690 2,010 372 8 109 106 117 408 790 1,440 2,180 4,770 16,500 7,110 2,250 338 9 108 104 158 379 1,230 1,320 2,7SO 6,100 15,900 6,690 1,850 306 10 107 106 5,600 372 1,530 1,230 2,880 6,960 14,800 6,260 1,380 276 11 106 119 31 ,700 365 2,310 1,400 2,9SO 8,460 14,000 6,480 1,060 276 12 105 140 6,890 358 1,260 6,590 3,200 9,840 11,100 4,560 868 276 13 104 117 2,440 348 1,170 5,490 2,780 12,000 9,220 3,940 978 276 14 107 126 1,590 348 1,260 2,780 2,400 14,000 9,220 3,800 950 276 16 123 142 1,280 678 1,090 2,260 2,400 15,500 11,100 3,660 815 262 16 140 128 1,090 589 986 2,440 2,880 13 ,300 12 ,400 3,940 840 248 17 130 177 985 745 885 2,400 2,680 11,400 12,000 3,940 700 248 18 125 212 885 722 885 1,940 6,700 11,000 11,100 5,480 632 248 19 121 157 790 655 910 1,800 7,200 9,560 9,4SO 4,730 632 248 20 116 167 700 581 860 2,680 7,440 7,440 7,550 4,400 568 248 81 112 169 655 534 860 2,100 7,440 6,520 6,900 4,560 568 248 22 110 161 602 581 885 1,800 7,940 6,100 7,550 4,730 568 235 83 107 144 610 543 935 1,620 7,940 8,200 9,220 4,910 568 235 24 106 146 539 498 1,040 1,980 7,440 9,840 11,100 4,660 568 222 25 106 150 502 606 1,040 1,720 5,700 10,700 12,400 4,400 568 209 568' 26 104 144 498 514 985 1,560 5,130 11,000 12,700 5,290 184 27 101 144 482 526 960 1,530 4,960 12,700 12,700 6,080 547 196 28 101 136 454 539 1,280 1,690 5,130 12 ,000 11,400 3,800 547 998 89 101 134 442 589 1,620 5,320 10,700 8,480 3,400 506 746 30 99 132 442 560 1,460 4,590 11,400 7,780 3,400 526 526 31 101 438 572 1,400 12,700 3,400 547 Second- Ua^imim Run-off in Month foot-days Minimum Mean acre-feet Oct 3,408 140 99 110 6,760 H07 3,961 212 99 132 7,860 Dec 60,659 31,700 117 1,957 120,300 C 710,217 31,700 99 1,946 1 ,409 ,000 Jan uary 15,867 745 348 612 31,470 Feb 29,670 2,310 790 1,060 58,860 Mar 73,660 7,380 1,230 2,376 146,100 Apr 123,990 7,940 1,500 4,133 245,900 May 268,380 15,500 3,310 8,667 532,300 Jim 353,700 15,900 6,900 11,790 701,600 Jill 167,030 8,970 3,400 6,388 331 ,300 Aug 36,674 2,940 506 1,148 70,560 Sep 10,536 998 184 361 20,900 « ter year 1937-3 1,146,435 31,700 99 3,141 2,274,000 Peak discharge.- Dec. 11 (3 p.m. 52,500 see.-ft.j June 2 (12i01 a.m.) 18,300 sec.-ft.; June 4 (12101 a.m.) 18,700 sec.-ft. SAN JOAQUIN RIVER BASIN 183 San Joaquin River below Kerckhoff power house, Calif. Location.- Water-stage recorder, lat. 37°05', long. 119°34 ! , in SWi sec. 3, T. 10 S., R. 22 E., three-quarters of a mile downstream from Kerckhoff power house and 2 miles up stream from Big Sandy Creek. Altitude, about 605 feet. Drainage area.- 1,480 square miles. Records available.- December 1936 to December 1937 (station destroyed by flood of Dec. il, 1937). Extremes.- Maximum discharge, 75,000 second-feet Dec. 11, 1937 (gage height, 46.5 feet), from rating curve extended abcve 20,000 second-feet on basis of velocity-area studies, computed flow over Kerckhoff dam, and peak flow of San Joaquin River near Friant; minimum, 63 second-feet regulated, Dec. 20, 1936 (gage height, 5.15 feet). Remarks.- Records excellent. Flow regulated by operation of four storage reservoirs and six power plants upstream from station. See records for Florence Lake, Huntington Lake, and Shaver Lake. Storage in Crane Valley Reservoir was 24,709 acre-feet on Sept. 30, 1937, and 35,995 acre-feet on Sept. 30, 1938. Discharge, In second-feet, water year October 1937 to September 1938 Day Get. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1,160 886 713 2 1,020 1,060 665 S 869 1,120 721 4 1,090 1,100 620 5 1,090 1,130 306 6 1,230 1,080 907 7 1,200 648 1,270 8 1,190 668 1»SOO 9 1,230 1,110 760 10 879 1,110 5,240 11 1,160 986 41,800 12 1,160 1,060 _ IS 1,140 873 _ 14 1,230 691 _ 16 1,160 952 - 16 1,020 689 ^ 17 881 903 _ 18 1,070 1,180 _ 19 1,090 1,090 ., 20 1,160 1,010 - 21 1,160 759 _ 22 1,200 962 23 1,120 1,120 _ 24 986 1,090 _ 25 1,060 603 - 26 1,090 618 _ 27 1,090 515 _ 28 1,120 493 _ 29 1,200 597 «» SO 1,020 646 _ 31 847 - - Second- Ma-a^lffWa Rim-Off in Month foot -day a IClnljouffi Mean acre-feet 33 ,922 1 >S30 847 1,094 67 280 26 '749 1,180 493 892 53,060 Calendar year ...... April ...... Hay...... July...... Water year 184 SAN JOAQUIN RIVER BASIN San Joaquln River near Friant, Calif. Location.- Water-stage recorder, lat. 37°00'32", long. 119°41'44", in NEi sec. 5, T. 11 S., R. 21 E., 1 mile upstream from Cottonwood Creek and li miles northeast of Friant. Zero of gage is 315.03 feet above mean sea level. Drainage area.- 1,632 square miles. Records available.- December 1913 to September 1938. October 1907 to December 1913 at site 2 miles upstream. Average discharge.- 31 years (1907-38), 2,336 second-feet. Extremes.- Maximum discharge during year, 77,200 second-feet Dec. 11 (gage height, 23.8 feet), from rating curve fully defined; minimum, 286 second-feet Dec. 6. 1907-38: Maximum discharge, that of Dec. 11, 1937; minimum, 44 second-feet, regu lated, Sept. 15, 1924, Sept. 14, Oct. 12, 1931. Remarks.- Records good. Flow regulated by four storage reservoirs and six power 'plants upstream from station. See record for San Joaquin River below Kerckhoff power house. Discharge, In second-feet, water year October 1937 to September 1938 0ay Oct. HOT. Dec. Jan. P»t. Mar. Apr. Say Tune July Aug. Sept. 1 1,190 890 726 988 2,710 7,380 3,220 6,820 16,100 10,100 4,310 1,670 2 995 1,010 677 957 2,820 19,300 3,840 6,600 17,300 10,300 3,990 1,670 3 890 1,070 698 1,400 3,770 18,000 4,480 6,380 17,000 9,800 4,070 1,790 4 915 1,120 680 1,380 4,020 8,540 5,180 6,380 17,700 8,760 3,420 1,140 6 1,100 1,070 452 1,270 2,920 6,820 6,600 6,380 16,400 8,500 3,150 1,100 6 1,130 1,100 527 1,330 2,160 5,560 5,000 6,820 14,800 8,500 2,740 1,450 7 1,160 794 1,360 1,220 1,910 5,000 4,820 7,280 15 ,400 8,500 2,410 1,340 B 1,120 YY6 1,820 1,120 2,060 5,960 4,650 7,760 17,000 8,240 3,150 1,560 9 1,160 1*060 524 1,040 3,470 4,650 5,560 9,020 17 ,700 8,240 3,340 1,360 10 918 1,120 4,430 1,270 3,240 4,650 5,370 10,100 17,000 7,280 2,620 1,240 11 1,020 1,030 37,900 1,190 15,900 4,070 5,960 11,100 16 ,100 6,820 2,170 1,120 12 1,090 1,010 19,300 1,190 7,820 11,200 6,160 12,200 13,300 5,960 2,040 1,280 13 1,130 1,000 5,100 1,190 4,500 18,300 5,960 13 ,900 11,600 5,370 1,990 1,340 14 1,160 654 1,970 1,230 4,860 9,280 5,560 16,400 11,100 5,180 1,870 1,410 16 1,130 8YY 2,070 2,950 4,240 7,040 5,000 17,700 12 ,500 5,000 1,710 1,380 16 995 804 1,870 2,400 4,120 6,600 5,560 16,400 13,900 5,000 1,750 1,420 17 894 673 1,530 1,500 2,440 7,520 6,380 13,90O 13,900 5,000 2,220 1,220 18 974 1,130 1,580 2,040 3,180 5,560 8,760 13,600 13,300 5,960 1,710 1,060 19 1,120 1,120 1,370 1,950 4,820 5,370 10,600 12,200 11,400 6,160 1,710 1,090 20 1,140 1,020 1,370 1,900 3,220 5,760 10,800 10,600 9,800 5,760 1,670 1,360 21 1,130 830 1,460 1,610 3,050 5,560 11,100 9,280 8,760 5,960 1,300 1,390 22 1,150 874 1,340 1,570 2,820 5,370 11,600 8,500 9,280 5,960 1,230 1,240 23 1,100 1,120 1,340 1,390 3,380 4,310 11,600 10,100 10,100 5,960 1,520 1,320 24 988 1,060 1,38O 1,260 2,650 3,840 11,100 11,900 12,200 5,760 1,590 1,180 25 1,060 778 896 1,430 1,750 4,650 10,300 13,300 13,300 5,560 1,750 1,060 26 1,060 488 978 1,430 2,410 4,070 8,240 13,300 13,600 6,600 1,710 1,030 27 1,060 640 1,310 1,430 2,170 3,620 8,240 14,500 14,200 7,280 1,670 1,370 28 1,100 498 1,140 1,460 2,680 3,690 8,240 14,500 13,600 5,760 1,420 1,460 29 1,140 526 1,310 1,870 3,840 8,760 13,000 11,100 4,820 1,340 2,100 30 1,030 622 1,120 1,560 3,550 8,000 13,000 9,020 4,650 1,560 1,670 31 839 1,170 1,620 3,410 14,500 4,150 1,630 Second- Run-«fT In Month MqTClflTVnn Minimum Mean foot-days acre-feet Oct 32,888 1,190 839 1,061 65 ,230 Hov 26,764 1,130 488 892 53,090 Dec 99,398 37,900 452 3,206 197,200 C 1,187,955 37,900 452 3,255 2,356,000 Jan nary 46,145 2,950 957 1,489 91,530 Fob 105,090 15,900 1,750 3,753 208,400 Kar 212,470 19,300 3,410 6,854 421 ,400 Apr 216,640 11,600 3,220 7,221 429,700 Bay 346,420 17,700 6,380 11,170 687,100 Jun 408,460 17,700 8,760 13,620 810,200 Jul 206,890 10,300 4,150 6,674 410,400 Aug 68,760 4,310 1,230 2,218 136,400 Bep 40,820 2,100 1,030 1,361 80,970 Water year 1937-3 1,810,746 37,900 452 4,961 3,592,000 Peak discharge.- Dee. 11 (7 p.m.) 77,200 sec.-ft,j Mar. 2 (3i30 p.m.) 41,400 see.-ft,j Mar. 12 (10i30 p.m.) 27,000 sec.-ft. Note,- Discharge for periods of faulty intake operation, Dec. 13 to Feb. 24, Mar. 3, 4, 12 and Sept. 26-30, computed on basis of records for San Joaquin River near Friant; that for periods Feb. 25 to Mar. 2 and Mar, 5-11 computed from gage heights at auxiliary water-stage recorder. SAN JOAQUIN RIVER BASIN 185 San Joaguin River near Newman, Calif. Location.- Water-stage recorder, lat. 37°2,1'02,", long. 120°58'34", in SWi sec. 3, T. 7 S., R. 9 E., at bridge on Hills Ferry road, 300 feet downstream from mouth of Merced River and 3i miles northeast of Newman. Zero of gage is 51.0 feet above datum of Corps of Engineers, U. S. Amy. Drainage area.- 9,990 square miles. Records available.- April 1912 to September 1938. Prior to Oct. 1, 1937, flow that by- passed station at discharges above about 9,000 second-feet not included in records of discharge. Average discharge.- 26 years, 2,455 second-feet. Extremes.- Maximum discharge during year, 33,000 second-feet Mar. 7 (gage height, 18.50 feet), from rating curve fully defined: minimum, 272 second-feet Nov. 7 (gage height* 2.10 feet). 1912-38: Maximum discharge, that of Mar. 7, 1938; minimum, 15 second-feet Aug. 9, 10, 1924. Remarks.- Records good except those for periods pf missing gage heights, July 15-17, 23, which were estimated or interpolated and are fair. Practically entire flow of river and tributaries diverted during irrigation season, low-water records showing mainly amount of return water. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOY. Dec. Jan. Feb. Mar. Apr. ««y June July Aug. Sept. 1 434 314 466 3,720 3,560 10,600 15,000 15,000 19,500 14,100 3,820 900 2 466 304 466 3,640 4,840 11,300 14,100 15,400 19,500 13,700 3,620 860 3 500 294 483 3,640 4,930 13,300 13,000 15 ,400 20,600 13,700 3,550 842 4 517 289 483 3,660 5,380 16,80O 12 ,300 14,500 22,100 14,100 3,140 808 6 517 SBS 434 3,400 6,550 22,100 11,600 14,500 22,8OO 14,500 2,85O 842 6 534 277 434 3,330 7,420 31 ,700 11,300 14,500 23,600 14,100 2,640 825 7 617 277 450 3,260 8,080 33,000 11,600 14,100 23,600 13,700 2,570 808 3 483 279 466 3,330 8,450 31,700 11,100 14,100 22,800 13,000 2,430 790 9 500 SB& 483 3,120 9,010 30,400 11,100 14,100 22,800 12,600 2,130 772 10 534 289 606 3,190 9,690 28,100 10,500 13,300 23,600 11,900 1,S40 755 11 552 296 780 3,330 11,300 27 ,100 10,300 13,000 24,400 11,600 1,690 755 12 534 299 960 3,330 14,100 27,100 10 ,500 12,300 24,400 11,100 1,590 772 13 517 294 1,320 3,120 20,100 26,100 10,300 12 ,300 24,400 10,300 1,640 772 14 534 284 2,100 3,050 23,600 25,200 10,100 12 ,300 23,600 9,690 1,640 755 16 534 279 2,700 3,050 23,600 25,200 10,100 12,300 23,600 9,000 1,540 738 16 534 274 3,190 3,560 24,400 27,100 9,880 12,300 22,800 8,500 1,400 755 17 552 sas 3,560 3,880 24 ,400 29 ,200 9,880 12 ,300 22 ,800 8,000 1,320 738 18 517 294 4,040 4,120 24,400 28,100 9,690 12,600 22,800 7,280 1,220 755 19 483 327 4,390 4,480 22,800 28,100 9,510 13,300 22 ,800 6,320 1,140 772 20 434 419 4,S40 4,840 21,400 27,100 10,100 14,500 22,100 5,410 1,060 738 21 419 450 5,3SO 5,020 20,800 25,200 10,800 15,800 20,100 4,670 1,020 720 22 434 434 5,750 4,930 19,500 24,400 11,100 16,300 18,900 4,180 1,040 720 23 419 466 5,950 4,840 17 ,800 23,600 10,800 16,300 17,300 4,100 1,040 702 24 434 500 6,050 4,660 15,400 22,100 10,800 16,800 16,800 4,090 1,040 702 25 419 517 5,850 4,480 14,100 20,800 11,300 18,400 17,300 4,090 1,040 702 26 404 517 5,290 4,210 13,000 20,100 11,900 19 ,500 17,800 4,090 1,020 720 27 368 4S3 4,75O 3,96O 11,900 20,100 13 ,000 19,500 17 ,800 4,090 1,000 738 28 348 434 4,390 3,800 11,300 20,100 13,700 20,100 17 ,300 4,000 9SO 755 29 343 434 4,120 3,640 19,500 14,500 20,100 16,800 3,910 1,000 755 SO 330 434 3,880 3,720 17,300 14,5OO 20,100 15,400 3,820 960 772 31 314 3,720 3,640 15,800 19,500 3,730 940 Seoond- Run-off In Month f oot-days MmHuniiti l»M San Joaquin River near Vernalis, Calif. Location.- Water-stage recorder, lat. 37°40'34", long. 121°15'51", In El Pescadero grant, at Durham Ferry highway bridge, 3 miles downstream from Stanislaus River and 34 miles northeast of Vernalis, San Joaquin County. Altitude, about 10 feet. Drainage area.- 14,010 square miles. Records available.- July 1922 to September 1938 (1922-23 and 1925-29 during low-water periods only;. Extremes.- Maximum discharge during year, 51,200 second-feet Mar. 16 (gage height, 26.64 feet; Including flow through break in levee; maximum gage height, 27.05 feet Feb. 12, before break in levee; minimum discharge, 1,580 second-feet Oct. 1. 1922-38: Maximum discharge recorded, that of Mar. 16, 1938: minimum discharge, 184 second-feet Aug. 14, 1931. Remarks.- Records good except those for period Feb. 13 to July 15, which Include flow through break in right-bank levee of Stanislaus River 500 feet upstream from its con fluence with San Joaquin River and are fair. Practically entire flow of all streams in San Joaquin River Basin Is diverted during irrigation season, and records for periods of low water are mainly those of return flow of diverted water. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. »»y June July Aug. Sept. 1 1,620 1,720 2,140 6,460 7,560 19,800 24,200 26 ,500 36 ,700 27,600 6,700 2,240 2 1,720 1,720 2,210 6,170 10,400 20,600 22,600 26,100 37,600 26 ,500 5,600 2,S40 3 1,900 1,360 2,210 5,720 12,400 21,800 21,400 24,600 39,300 23,000 6,600 2,240 4 1,960 1,900 2,210 6,640 13,800 26,500 20,800 26,10C 42,200 21,400 6,400 3,240 6 1,900 1,900 2,210 6,S10 16,200 33,600 20,200 26,100 44,300 21,400 6,100 2,240 6 1,930 1,900 2,280 6,810 17,700 35,100 20,600 24 ,200 46,600 21 ,400 4,830 3,340 7 1,960 1,930 2,280 5,630 16,300 36,700 21,800 23,SOO 47,600 21,100 4,660 2,240 8 2,000 1,930 2,210 6,630 14,400 3S,400 21,600 23,400 47,600 20,600 4,660 2,170 9 1,960 1,860 2,210 5,540 13,500 38,400 21 ,400 23.40C 46 ,600 19 ,800 4,470 2,170 10 1,820 1,930 2,280 5,270 14,100 39,300 20,500 23,400 45,400 19,600 4,200 2,170 11 1,860 1,930 2,420 6,090 17,300 39 ,300 20,500 23 ,400 44,300 19,200 3,S40 3,170 12 1,900 1,930 3,260 6,270 28,000 36,700 20,500 23,400 43,200 18,900 3,600 2,170 IS 1,900 1,930 5,360 5,270 34,000 36 ,900 20,800 23,800 41,200 18,100 3,440 3,170 14 1,960 1,960 6,460 5,270 40,000 40 ,200 21,400 24,20C 39,300 16,700 3,360 2,100 2,070 1,930 7,060 6,160 39,300 60,000 21,800 26 ,100 35,900 16,400 3,360 2,170 16 2,310 1,860 7,060 5,360 36,700 50,000 21,800 27,600 33,600 14,400 3,040 2,170 17 2,140 1,930 7,160 5,540 36,100 43,200 21,400 30,100 34,300 13,800 2,600 2,100 2,070 1,960 Y,260 5,720 33,600 41,200 21,100 30,80C 35,100 13,400 2,660 2,170 19 2,000 1,960 7,260 6,080 31 ,500 39,300 21,100 31,600 35,900 12,800 2,400 2,240 BO 2,000 2,000 7,260 6,660 29,400 37,500 21,400 32 ,200 36,900 12,000 2,320 2,240 21 1,930 2,070 7,160 7,1BO 28,200 35,900 22 ,200 31,600 34,300 10,SOO 2,240 3,240 1,860 2,140 7,460 7,460 27,100 36,900 23,400 30,SOO 31,600 9,000 2,320 2,170 1,900 2,070 7,660 7,360 26,000 34 ,300 24,200 30,10C 28,200 7,680 2,240 3,100 24 1,820 2,140 7,860 7,160 26 ,600 32,900 24,200 29,400 26,000 6,810 2,170 3,170 1,790 2,210 7,860 6,960 24,200 30,SOO 24,600 30,1UO 26 ,500 6,600 2,170 2,240 26 1,760 2,210 7,660 7,360 22,600 30,100 25,100 31 ,500 26,500 6,300 2,100 2,320 1,760 2,140 7,660 7,360 20,800 28,800 25 ,600 33,600 26,200 6,200 2,100 2,400 1,820 2,140 7,360 7,260 20,200 27 ,600 25,600 34,300 28,800 6,100 2,100 2,400 1,790 2,140 7,260 7,060 _ 27,100 25,100 36,700 29,400 6,000 2,100 3,400 SO 1,790 2,070 6,960 6,860 - 26,500 25,500 37 ,500 28,800 5,900 2,030 2,400 1,760 - 6,660 7,160 - 25,5OO - 37,500 - 5,600 2,030 - Seeond- Month Run-off In foot-days Maximum Minimum Mean acre-feet 2 210 2 210 164,560 7,860 2,140 5,308 326,400 2,841,530 26 ,OOO 960 7,785 6,636,000 6,199 361,200 23,420 1,301,000 March...... April...... 672,300 26,600 20,200 22,410 1 ,333 ,000 1Uy...... t ...... 2,181,000 898,300 1O4 140 3,369 206,600 66,730 2,400 2,100 2,224 132,400 Water year 1937-3 5,463,890 50,000 1,620 14,970 10,840,000 SAN JOAQUIN RIVER BASIN 187 Florence Lake near Big Creek, Calif. Location.- Water-stage recorder, lat. 37°17', long. 118°58', in SEi sec. 36, T. 7 S., R. 27 E., in gatehouse of Ward tunnel, 16 miles northeast of village of Big Creek. Records available.- November 1925 to September 1938. Remarks.- Florence Lake,on South Fork of San Joaquin River is one of main storage units of Big Creek system of Southern California Edison Co. Elevation of crest of dam is 7,329 feet above mean sea level; elevation of top of spillway gates is 7,327.5 feet above mean sea level (capacity, 64,406 acre-feet). Ward tunnel diverts water into Huntington Lake. Record of contents, furnished by Southern California Edison Co., shows amount available for diversion. Contents, In acre-feet, water year October 1937 to September 1938 D«y Oct. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 52,184 52,915 6,386 162 161 214 215 847 25,763 36,377 64,348 64,137 2 52,193 52,954 3,332 162 186 366 251 847 31,487 56,478 64,271 63,964 5 52,220 52,943 1,387 159 193 392 299 838 37,624 56,284 64,348 63,801 4 52,247 52,952 591 159 205 379 333 877 43,693 56,072 64,396 63,849 6 52,274 52,970 306 157 224 379 322 972 49,028 55,777 64,319 63,849 6 52,310 51,101 214 154 259 340 284 1,120 54,199 55,381 64,705 63,762 7 52,328 50,504 184 151 274 298 345 1,246 56 ,488 55,519 64,897 63,446 B 52,346 49,460 116 149 242 273 437 1,294 56,960 55,390 64,444 62,843 9 52,382 48,363 163 149 212 258 575 1,154 57,015 65,243 64,291 62,090 10 52,410 47,276 415 147 222 245 626 1,208 57,006 54,968 64,358 61,568 11 52,437 45,924 2,192 144 223 242 671 1,548 56,654 54,665 64,473 61 ,264 12 52,464 44,562 1,355 144 279 288 754 1,978 56,312 54,272 64,464 60,791 13 52,509 44,080 850 143 337 291 720 2,414 55 ,823 54,400 64,300 60,233 14 52,545 43,625 658 144 342 303 706 3,891 56,036 56,045 64,637 59,979 16 52,581 43,138 489 144 322 317 737 5,590 56,562 58,964 64,387 59,763 16 52,599 42,679 410 156 287 329 813 6,674 56,849 62,357 64,329 59,734 17 52,626 41,956 313 162 258 320 936 7,108 66,765 64,204 64,214 59 ,725 IB 52,653 40,071 297 166 232 293 1,221 7,144 56,414 64,012 64,146 59 ,753 19 52,671 37,153 284 162 222 280 1,572 7,247 55,999 64,223 64,146 59,763 20 52,689 34,023 275 158 222 281 1,855 6,982 55,750 64,570 64,137 59,744 21 52,707 30 ,707 245 163 220 267 2,079 6,492 55,621 64,589 64,204 59 ,706 22 52,725 27,347 219 161 214 254 1,767 6,081 65,796 64,705 64,319 59,650 23 52,752 24,028 205 157 214 244 1,653 6,138 66,349 64,367 64,339 59,584 24 52,770 21,846 202 156 214 236 1,615 6,747 56,951 64,387 64,319 59,490 25 52,788 21,228 200 155 207 228 1,364 7,694 67,192 64,262 64,291 59 ,386 26 52,797 20,804 197 155 200 219 1,052 9,157 57,284 64,637 64,291 59,264 27 52,825 18,954 196 155 197 217 929 11,035 57,238 64,166 64,233 59,236 28 52,843 15,697 195 151 205 225 930 12,465 66,617 64,444 64,329 59,339 29 52,861 12,589 180 161 - 230 886 14,329 56,331 64,464 64,329 59,349 50 52,879 9,501 169 166 221 863 16,440 66,201 64,608 64,329 59,321 31 52,897 - 162 163 - 214 20,654 64,377 64,271 188 SAN JQAQUIN RIVER BASIN South Fork of San Joaquin River near Florence Lake, Calif. Location.- Water-stage recorder, lat. 37°16'20", long. 118°57'50", in SEi sec. 36, T. 7 S., R. 27 E., Just downstream from spillway of Florence Lake dam, 6 miles upstream from mouth of Bear Creek. Altitude, about 7,200 feet. Drainage area.- 171 square miles. Records available.- December 1921 to September 1938. Average discharge.- 15 years (1922-31, 1932-38), 270 second-feet, combined flow of South Fork of San Joaquin River and Ward tunnel at intake. Extremes.- Maximum d'ischarge during year, 3,210 second-feet July 27 (gage height, 14.65 feet;; minimum, 0.1 second-foot, Nov. 12, 13, 15, Nov. 21 to Dec. 7, Dec. 14-16, May 14, 15, May 17 to June 2. 1921-38: Maximum discharge, 3,460 second-feet June 4, 1922 (gage height, 13.75 feet); practically no flow at times during 1934, 1925, 1935 to 1937. Remarks.- Records good. Flow regulated by storage and diversion above station. See1 records for Florence Lake and Ward Tunnel at intake. Gage-height record and results of several discharge measurements furnished by Southern California Edison Co. Discharge, In second-feet, water year October 1937 to September 193S Day oet. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.7 0.9 0,1 0,9 0.7 1.3 1.3 310 0.1 2,010 1,000 2.3 2 .7 .9 .1 ,9 .5 3.2 1.6 283 .1 2,170 975 2.3 S ,9 .9 .1 ,9 2,6 1.6 1,7 273 .2 2,130 690 2.1 4 .9 .9 283 .3 1,890 660 2.1 6 .9 .9 .1 .7 1.1 1.3 1.5 296 ,4 1,700 390 2.1 6 .9 .7 ,1 .7 1.1 1.1 1.3 302 20 1,260 402 2.1 7 ,7 .7 .1 363 1,400 851 850 2.1 8 .7 ,5 14 448 2,410 1,050 860 1.7 9 .7 .2 2.6 .7 1.3 1.1 50 590 2,670 1,000 395 1.6 10 .7 .2 2,6 .7 4.0 1,1 94 690 2r670 900 167 1.6 11 .7 ,2 1.9 .7 6.6 l.B 108 690 2,680 710 3.2 1.3 12 .7 .1 ,4 .7 6,6 2.1 236 610 2,040 462 99 1.3 13 .7 .1 .2 .7 5.6 1,7 223 361 1,700 143 157 1.3 14 .7 ,2 .1 .7 2,3 3,6 166 ,1 1,660 1,5 61 1.6 15 ,7 ,1 .1 .9 1.5 1.5 187 .1 1,970 1.6 90 1.5 16 .7 .2 .1 .9 1.1 1.5 262 .3 2,410 1.7 2,1 1.5 17 .7 .3 15 .9 ,9 1.6 401 ,1 2,490 963 1,9 1.5 18 .7 ,2 2,3 .9 .9 1.7 550 .1 2,330 1,560 1.7 1.5 19 .7 .2 1.9 ,9 ,9 1,7 690 .1 1,970 1,140 1.7 1.3 20 ,7 .2 1.7 .7 1.1 1,7 590 ,1 1,560 1,200 1.7 1.3 21 .9 ,1 1.5 .7 1.1 2.1 610 .1 1,290 1,420 1.7 1.3 22 .9 ,1 1,3 .5 1.1 1,3 610 .1 1,290 1,460 2.1 1.3 23 .9 .1 1.3 .4 1,1 1,6 590 ,1 1,700 1,740 2.6 1.3 24 .9 ,1 1.3 ,4 1,1 1.3 590 .1 2,330 1,620 2.6 1.3 25 .9 .1 1.1 .4 1.1 1.3 590 .1 2,670 1,660 2.1 1.3 26 .9 .1 .9 .4 1.1 1,3 570 .1 2,850 1,840 2,1 1.3 27 .9 .1 .9 .4 .9 1.1 560 .1 2,940 2,090 2,1 1.6 28 .9 .1 .9 .4 1.3 1.3 615 .1 2,760 1,200 2,3 1,3 29 .9 ,1 .9 .4 1.3 516 ,1 1,950 1,200 2,6 1.1 SO .9 ,1 .9 .4 1,1 360 .1 1,860 1,170 2.3 1.1 51 ,9 .9 .4 1.1 .1 1,320 2.1 Second- Run-off In jf^y^yntfli Minimum Mean Month foot-days acre-feet Oet 24.7 0.9 0.7 0,80 49 Hoi 9.6 .9 ,1 .32 19 Dec 55.6 15 ,1 1.79 110 C 33,546,1 2,300 .1 91.9 66,530 Jan uary 20.4 .9 .4 0.66 40 Pel 53,7 6,6 ,6 1.92 107 M&i 47.2 3.6 1.1 1.52 94 API 8,991,0 610 1,3 300 17,830 6,301.0 610 ,1 171 10,510 Tin 61,411.1 2,940 .1 1,714 102 ,000 Ju3 37,763,7 2,170 1.6 1,218 74,880 Am 6,802.9 1,000 1.7 219 13,490 flej 46.6 2.3 1.1 1.55 92 1fater year 1937-3 110,517.4 2,940 .1 303 219,200 SAN JOAQUIN RIVER BASIN 189 Ward tunnel at intake, Calif. Location.- Water-stage recorders, concrete control, and venturi meter, lat. 37° 17', long. 118°58', in SEi sec. 36, T. 7 S., R. 27 E., in gatehouse at entrance to tunnel. Altitude, about 7,350 feet. Records available.- April 1925 to September 1938. Average discharge.- 12 years (1925-31, 1932-38), 225 second-feet. Extremes.- Maximum daily discharge during year, 1,700 second-feet NOT;. 22; minimum daily, 0.3 second-foot Apr. 18, May 10. 1925-38: Maximum daily discharge, 1,990 second-feet Apr. 30, 1926; no flow at times. Remarks.- Records good. Ward tunnel diverts water from Florence Lake, a storage reser- voTr on South Fork of San Joaquin River, to Huntington Lake for use in Big Creek power plants of Southern California Edison Co., who furnished gage-height record. Discharge, In second-feet, water year Ootjober 1937 to September Day Dot. HOT. Doe. Jan. Feb. Bar. Apr. toy June July Aug. Sept. 1 1.4 1.4 1,530 58 52 108 116 0.5 1,1 1.6 198 364 2 1.5 1.5 1,410 59 65 168 142 .5 1.2 1.8 258 361 3 1.6 1.6 967 53 86 236 188 .4 1.3 1,8 299 355 4 1.6 1.6 489 51 90 225 214 .4 1.4 1.8 289 247 6 1.5 1.6 178 49 99 226 193 .4 1.4 220 529 247 6 1.5 966 83 46 122 209 164 .4 1.5 778 393 267 7 1.4 320 46 45 142 172 164 ,4 1.5 1,010 1.8 346 8 1.4 539 34 43 142 150 225 .4 1.5 1,010 237 470 9 1.4 564 34 42 119 135 177 .4 1.5 1,010 369 528 10 1.4 562 173 42 102 129 194 .3 1.6 1,000 402 421 11 1.4 699 556 40 114 126 183 .4 1.6 1,010 552 323 12 1.4 692 790 39 121 165 5 134 1,6 1,000 480 394 13 1.4 261 497 39 170 164 5 718 1.6 1,000 416 426 U 1.4 259 291 39 201 173 4 1,060 1,5 742 291 277 16 1.4 259 264 42 196 194 4 1,040 1.5 365 460 251 16 1.4 258 182 42 172 202 4 1,040 1,5 193 469 147 17 1.4 404 142 55 144 185 4 1,010 1.5 1.8 469 147 IS 1.4 1,020 116 57 127 164 3 1,190 1.6 243 416 146 19 1.4 1,480 103 59 112 164 4 1,000 1.6 484 366 147 80 1,4 1,600 94 52 114 159 5 1,000 1.6 263 366 146 81 1.4 1,660 97 51 113 145 178 980 1.6 158 307 145 88 1.4 1,700 90 56 111 136 359 980 1.6 129 284 145 83 1.4 1,680 81 51 108 130 200 985 1.5 1.8 396 144 24 1.4 1,060 65 47 111 123 54 1,000 1.5 39 405 144 25 1.4 314 63 49 106 119 .6 1,020 1.5 208 384 142 26 1.4 232 62 49 99 114 .5 954 1.5 165 378 140 87 1.4 1,010 60 60 96 112 .5 946 1.5 33 395 147 88 1,4 1,650 59 50 98 124 .5 1,020 1.5 127 314 152 89 1.4 1,560 65 50 128 ,5 733 1.5 93 366 151 30 1.4 1,580 64 56 115 .5 814 1.5 35 366 149 31 1.4 58 60 109 145 72 366 Seoond- Month Run-off la foot-daya Maximum Minimum Mean aore-faet Oct 44.1 1.6 1.4 1.42 87 Hoi 22,356.7 1,700 1.4 745 44,340 Dec 8,743 1,530 34 282 17,340 C 107,091.9 1,700 .5 293 212,400 Jan am** 1,521 60 39 49.1 3,020 Fob 3,332 201 52 119 6,610 Mar 4,799 236 108 155 9,520 Apr 11...... 2,757.9 369 .3 91.9 5,470 £* 17,773.5 1,190 .3 573 35,860 Jim 44,8 1.6 1.1 1.49 89 Jul Ilr397.6 1,010 1.6 368 22,610 £* 11,212.8 552 1.8 362 22,240 Sep 7,469 528 140 249 14,810 1 top year 1937-3 91,451.4 1,700 .3 261 181,400 190 SAN JOAQUIN RIVER BASIN Ward tunnel at outlet, Calif. Location.- Water-stage recorder, lat. 37°16', long. 119°09', in SEi sec. 5, T. 8 S., R. 26 E., just upstream from tunnel outlet, at east end of Huntington Lake, and 6 miles northeast of Big Creek. Altitude, about 7,200 feet. Records available.- November 1927 to September 1938. Average discharge.- 10 years, (1928-38) 383 second-feet. Extremes.- Maximum daily discharge during year, 1,760 second-feet Nov. 22, 23; minimum daily, 2.8 second-feet May 11. 1927-38: Maximum daily discharge, 2,080 second-feet June 21, 1935; minimum daily, that of May 11, 1938. Remarks.- Records excellent. Tunnel diverts water from Florence Lake to Huntington Lake. See~~record for Ward tunnel at intake. Between intake and outlet, tunnel receives water diverted from Bear Creek, Mono Creek, and at times from several other small tributaries of South Fork of San Joaquin River. Gage-height record and result of one discharge measurement furnished by Southern California Edison Co. Discharge, In second-feet, water year October 193V to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 34 30 1,650 11 V 112 191 209 1V9 3.6 4,0 823 628 2 32 29 1,540 117 136 264 246 16V 3.4 4.0 881 610 3 31 28 1,080 112 166 364 312 132 3.4 4.0 908 699 4 32 27 538 110 16V 354 361 145 3.6 4.0 910 458 6 33 2V 225 106 184 36V 320 159 3.8 163 1,130 439 6 33 886 131 101 224 340 289 177 4.0 V26 1,100 438 7 33 369 82 100 248 288 28V 202 4.0 1,000 639 516 8 32 529 66 9V 230 253 382 141 4.0 1,OOO V48 618 y 32 692 6V 92 201 233 383 3,6 4.0 1,000 986 681 10 31 588 313 94 186 222 406 3.2 4.0 1,000 899 581 11 30 692 85V 92 204 217 433 2.8 4.0 1,000 994 517 12 30 768 1,090 89 202 256 227 V6 4.0 1,000 922 666 30 282 688 89 258 265 188 6V6 4.0 998 818 584 14 34 284 458 89 319 288 168 1,060 4.0 1,140 V04 438 34 281 424 92 311 319 169 1,050 4.0 978 77V 389 16 32 282 302 91 2V8 323 199 1,060 4.0 846 820 269 30 386 255 113 236 296 28V 1,020 4.0 642 V8V 263 29 906 219 117 214 266 438 1,200 4.0 837 V37 282 28 1,560 192 118 196 254 583 1,010 4.0 1,100 661 27V 28 1,620 1V9 111 199 260 613 1,000 4.0 912 637 266 21 28 1,730 1V8 111 198 243 V66 984 4.0 796 684 26V 27 1,760 165 120 195 230 1,010 976 4,0 778 652 253 27 1,V60 15V 108 191 224 843 984 4,0 644 696 249 24 27 1,300 125 105 193 214 706 1,000 4,0 662 723 242 27 388 131 10V 188 20V 622 1,020 4.0 832 688 235 26 27 258 128 10V 1V9 203 340 967 4.0 823 656 228 27 841 125 108 1V4 200 293 942 4.0 665 669 232 27 1,V10 121 107 178 219 313 1,140 4.0 V64 660 336 27 1,660 124 109 ,, 223 326 633 4.0 V3V 668 301 27 1,640 128 114 _ 203 228 880 4.0 681 730 276 29 - 118 122 " 199 - 220 68V 6V2 - Second- Month Run-off In foot-days Mqxl.itrvnn Minimum Mean acre-feet Opo 34 t->rt 29 11*856 1,660 66 382 23 ,520 159,289.5 1,760 6.5 436 316,000 106 6,480 319 11,440 March...... V 98V 15,840 23,480 May...... 19,189,6 1,200 2.8 619 38,060 117.8 4,0 3,4 3.93 254 22,406,0 24,078 1,130 662 777 47,760 12,015 681 228 400 23,830 Water year 1937-3 142,668.4 1,760 2.8 391 283,000 SAN JOAQUIN RIVER BASIN 191 Bear Creek near Vermilion Valley, Calif. Location.- Water-stage recorder, lat. 37°20', long. 118°58', in SW-i sec. 12, T. 7 S., R. 27 E., 2 miles upstream from mouth and 4 miles by trail south of Vermilion Valley. Altitude, about 7,400 feet. Drainage area.- 53.5 square miles. Records available.- November 1921 to September 1938. Average discharge.- 14 years (1922-30, 1932-38), 81.9 second-feet. Extremes.- Maximum discharge during year, 1,230 second-feet June 2 (gage height, 6.45 reetj; minimum, 3.2 second-feet Nov. 11. 1921-38: Maximum discharge, 1,530 second-feet July 21, 1936 (gage height, 6.90 feet; minimum recorded, 1.2 second-feet Sept. 29 to Oct. 5, 1924. Remarks.- Records good except those for periods of ice effect, Dec. 24 to Mar. 9, Mar. 12-18, 21, 22, which were computed on basis of two discharge measurements and records for Mono Creek near Vermilion Valley, Ward tunnel at intake, and Ward tunnel at outlet and are fair. No storage or diversion above station. Gage-height record and results of several discharge measurements furnished by Southern California Edison Co. Rating table, water year 1937-38 (gage height, In feet, and discharge, in aeeond-feet) 2.9 1.6 71 4.8 320 5.8 840 3.0 4 4.0 104 6.0 404 6.0 960 3.2 4.2 140 6.2 600 6.2 1,080 3.4 24 4.4 1S4 5.4 600 3.6 44 4.6 244 6.6 720 Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. HOT. Deo. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 7 6 8 18 20 25 25 92 810 555 404 109 2 6.5 6 7.5 17 25 30 32 84 930 570 40O 101 S 6 6,5 7 17 25 40 45 79 990 650 362 96 4 6.6 5 8 16 26 40 49 82 936 485 308 90 6 7 4.9 7 16 30 46 40 89 834 495 292 S4 6 6.6 6 7 16 30 40 41 94 840 540 320 77 7 6.6 4,9 6.6 16 30 40 41 106 792 680 337 67 B 6.5 4,3 -6,5 15 30 35 63 122 780 612 333 60 9 6.6 6 7 16 25 36 73 131 834 600 266 66 10 6 4,9 62 14 26 32 76 170 798 540 212 54 11 6 4.3 248 14 30 29 82 215 690 475 187 76 12 6 5 81 14 26 30 71 304 520 400 182 65 13 6.5 5,5 70 14 30 36 63 413 418 375 177 60 14 7 6,6 68 14 35 40 48 625 470 441 160 56 IB 7 6.6 62 14 35 40 49 600 612 610 148 62 16 6.6 6.6 42 16 35 38 70 500 702 646 146 60 17 6.5 7.5 37 16 30 38 115 409 696 626 136 49 IB 6.5 7 33 16 30 36 187 375 575 610 126 60 19 6 9 33 16 30 34 228 308 485 620 115 54 20 5.5 8.5 31 16 30 36 238 231 422 526 113 50 21 5.5 a 28 16 30 35 266 192 366 480 115 47 22 6.5 8 28 16 26 30 251 212 396 620 117 46 23 5.5 7.6 23 17 25 30 244 312 616 600 135 42 24 5.5 a 23 17 26 28 198 413 702 505 136 40 25 5.5 a 23 17 26 27 138 470 792 470 129 36 26 5 8 23 18 20 26 120 520 862 600 118 34 27 6.5 7.6 22 18 20 28 135 565 876 556 111 36 28 6.5 7.6 21 18 25 28 146 625 690 427 108 84 29 6 8 21 20 _ 26 148 510 480 409 140 64 30 5.5 7.5 20 20 m 27 109 595 470 418 148 66 31 6 - 19 20 - 25 - 696 413 126 - Seoond- MaTtumn Run-off In Month foot-days Minimum Mean acre-feet 188.6 7 5 6.08 374 195.8 9 4.3 6.53 388 1,072.6 248 6.6 34,6 2,130 Calendar year 1937...... 39,795.3 648 _ 109 78,940 603 20 14 16.2 998 770 35 &\)ne\ 27.5 1,630 Mareh...... 1,026 45 26 33.1 2,040 April ...... 3,370 255 26 112 6,680 to...... 9,839 696 79 31V 19,520 tj\Jon l&OT^ /O WWUQQA 366 676 40,210 July ...... 16^50 612 376 605 31,040 6,107 404 108 197 12,110 1,860 109 34 61 ,Y 3,670 Water year 1937-; 60,844.8 990 4.3 167 120,700 Peak discharge.- June 2 (8 p.m.) 1,230 seo.-ft.j June 4 (7 p.m.) 1,230 seo.-ft.j June 26 (8 p.m.) 1,140 seo.-ft. 192 SAN JOAQUIN RIVER BASIN Mono Creek near Vermilion Valley, Calif. Location.- Water-stage recorder, lat. 37°22 T , long. 118°59', In SWi sec. 35, T. 6 S., R. 27 E., (unsurveyed), 1 mile dovmstream from lower end of Vermilion Valley and 6 miles downstream from mouth of North Fork. Altitude, about 7,400 feet. Drainage area.- 92.0 square miles. Records available.- November 1921 to September 1938. Average discharge.- 14 years (1922-30, 1932-38), 140 second-feet. Extremes.- Maximum discharge during year, 1,760 second-feet June 2 (gage height, 8.62 feet); minimum, 11 second-feet Nov. 27. 1921-38: Maximum discharge, that of June 2, 1938; minimum, 7.5 second-feet Dec. 6, 1932. Remarks.- Records good except those for periods of ice effect, Nov. 9 to Dec. 9, Dec. 24 to Apr. 16 (computed on basis of two discharge measurements and records for Bear Creek near Vermilion Valley, Ward tunnel at Intake, and Ward tunnel at out let), and periods of flow below 300 second-feet, which are fair. No storage or diversion above station. Gage-height record and results of several discharge meas urements furnished by Southern California Edison Co. Rating table, water year 1937-38 (gage height, In feet, and discharge, In second-feet) 4.6 10.6 5.4 111 565 7.0 746 7.8 1,210 4,8 22 5.6 161 460 7.2 866 8.0 1,340 6.0 6.8 217 540 V.4 970 B.3 1,560 5,2 6,0 285 640 7.6 1,090 Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. Her. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 20 19 22 40 40 66 65 230 1,410 910 414 148 2 19 19 20 40 46 65 70 214 1,520 940 410 140 3 20 IB 20 39 45 BO 75 202 1,660 BB2 386 133 4 20 17 IB 38 50 85 95 208 1,520 800 346 125 e 21 17 IB 38 55 90 85 223 1,410 772 329 116 6 21 IB 16 37 65 85 85 233 1,380 800 349 107 7 21 17 16 36 66 75 BO 249 1,380 856 349 98 S 20 16 IB 36 60 70 96 281 1,340 882 341 87 9 21 17 23 36 56 65 130 317 1,410 855 297 83 10 20 17 71 34 55 60 135 381 1,340 800 266 81 11 19 17 193 34 56 60 170 468 1,270 712 236 107 12 19 20 143 33 55 55 165 570 1,030 580 230 91 13 20 26 116 33 60 65 130 740 BOO 636 220 83 14 21 20 109 33 70 76 120 970 828 626 202 81 16 21 20 87 35 75 85 120 1,030 1,000 690 191 80 16 20 20 72 36 70 80 130 1,060 1,120 706 191 74 17 19 IB 67 36 60 75 169 800 1,160 696 177 72 18 19 20 60 36 60 70 243 718 1,060 650 174 80 19 IB 22 64 36 55 66 313 600 910 630 164 76 20 18 22 62 36 55 65 337 513 745 620 166 70 21 IB 20 67 36 55 60 381 454 660 695 168 68 22 IB 20 60 36 55 60 405 446 686 620 156 66 23 17 20 50 36 55 60 428 670 856 696 169 62 24 17 20 60 36 50 60 410 712 1,090 656 172 60 25 17 20 50 36 50 60 333 828 1,210 570 166 57 26 17 20 60 36 50 60 297 910 1,270 695 156 53 27 17 18 60 36 50 60 305 1,030 1,300 545 163 66 28 IB 20 45 38 65 66 321 1,030 1,150 454 148 100 29 17 22 43 38 66 317 970 856 464 166 78 30 17 22 42 38 60 260 1,060 BOO 464 200 88 31 19 41 38 60 1,210 446 172 Second- Run-off In Month IfflTf^Mllp iHi-Mumpi Mean foot -days acre-feet Dot 689 21 17 19.0 1,170 HOT 582 26 16 19.4 1,150 December...... ,...... -...--.-. 1,753 193 16 66.5 3,480 Calendar year 1937...... 66,999 1,030 184 132,900 Jan 1,125 40 33 36,3 2,230 Feb 1,570 75 40 66.1 3,110 Mar 2,095 90 55 67.6 4,160 Apr 6,259 428 65 209 18,410 May 19,227 1,810 202 620 38,140 Jim 34,048 1,650 660 1,135 87,530 Jill 7...... 20,834 940 446 672 41,320 Aug 7,232 414 148 233 14,340 fl«pt«ab«r...... 2,599 148 53 86,6 5,160 Water year 1937-3 87,913 1,650 16 268 194,800 Peak discharge.- June 1 (11 p.m.) 1,760 sec, -ft.; June 2 (lOiSO p.B.J 1,760 eec.-ft.j June 3 (ll p.m.) 1,6"9O seo.-rt. SAN JOAQUIN RIVER BASIN 193 Huntington Lake near Big Creek, Calif. Location.- Water-stage recorder, lat. 37°14', long. 119°13', in SWi sec. 14, T. 8 S., R. 25 E., at dam 1, 2 miles northeast of village of Big Creek. Records available.- October 1926 to September 1938. Remarks.- Huntington Lake on Big Creek is original storage reservoir of Big Creek system of Southern California Edison Co. Elevation of crest of main dam is 6,955.5 feet above mean sea level; elevation of crest of overflow spillway is 6,950 feet above mean sea level (capacity, 88,834 acre-feet). Water is received from South Fork of San Joaquin River, Bear Creek, and Mono Creek through Ward tunnel and re leased through Big Creek power house 1. Surplus water flows through Huntington- Shaver conduit to Shaver Lake. Record of contents, furnished by Southern California Edison Co., shows amount available for release. Contents, In aere-feet, water year October 1937 to September 1938 D«y Oct. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 38,115 5,960 30,202 36 ,300 20,666 20 ,096 IS, 593 28,931 76,710 76,670 67,862 88,319 2 37,057 4,897 32,166 36,014 20,392 20,392 18,433 28,329 78 ,018 77,007 87 ,876 88,391 3 36,071 3,844 33,426 35,457 20,210 20,352 18,670 28,579 79 ,527 77,356 37,890 88,534 4 35,051 2,734 33,727 34,893 20,049 20,962 18,677 28,287 30,594 77,531 87,890 83,406 e 34,002 1,915 33,627 34,307 19,867 21,197 18,420 28,112 80,938 77,774 88,119 88,291 3 32,961 2,971 33,052 33,709 19,327 21 ,613 17,917 28,104 81,090 78 ,764 88,748 88,090 7 31,920 3,057 32,474 33,106 19,753 21 ,528 17,534 28 ,287 81,269 79,992 28 ,605 87,962 e 30,905 2,980 31,929 32,510 19,615 21,303 17,399 28,587 81,820 81,172 88,677 88,005 9 29,866 2,998 31 ,475 32,053 19,588 21,024 17 ,424 28,646 82,153 82,166 88 ,691 88 ,205 10 28,880 2,998 33,251 31 ,440 19,523 20,776 17,270 28,906 82,083 83,277 88 ,605 88,233 11 27,815 3,246 38,615 30,844 20,022 20,604 17,430 29,355 81,462 84,144 88,691 88,205 12 26,756 3,879 40,941 30,219 20,264 21,003 17,282 30,193 30,183 84,802 88,662 88,190 13 26,690 4,454 42,547 29,583 20,639 21,635 17,005 32,862 78 ,629 85,126 88,591 88,248 14 24,626 5,124 43,636 28 ,965 21,003 21 ,493 16,664 37,231 77,383 85 ,802 88,820 88,048 15 23,613 5,714 44,591 28 ,504 21,289 21,542 16,318 41 ,960 76,576 86,034 88,648 87,719 16 22,572 6,205 44,581 28,120 21,486 21,578 16,067 46,122 75,840 86,368 88,705 87,220 17 81,627 6,556 44,317 27,700 21,592 21,493 16,184 50,013 74,893 86,780 88,605 86,624 18 20,583 7,215 44,054 27 ,290 21,697 21,387 16,850 54,095 73,793 86 ,978 88,548 86,212 19 19,536 9,102 43,855 26,797 21,676 21,409 17,823 57,549 72,648 87,319 88,491 85,703 SO 18,483 11,154 43,417 26,267 21,655 21,669 18,986 59,486 71,145 87,518 88,491 85,197 21 17,430 13,517 42,845 26,745 21,528 21 ,479 20,542 59,619 70,653 87,561 88,548 84,647 22 16,388 15,884 42,238 25,229 21 ,310 21,176 22,689 60,090 71,432 87,590 88,677 84,102 23 15,336 18,175 41,684 24,833 21,099 20,879 24,474 61,061 72,398 87,518 88 ,720 83,445 24 14,331 19,667 41 ,053 24,352 20,934 20,666 25,998 62,482 73,490 87,604 88,677 82,763 25 13 ,3Q2 19 ,941 40,659 23,800 20,776 20,311 26,934 64,177 74,495 87,661 88 ,605 82,319 26 12,202 19,687 40,296 23,262 20,659 20,143 27,503 66,104 75,346 87,962 88,462 81,654 27 11,122 20,590 39,655 22,734 20,583 20,210 27,987 68,451 76 ,000 87,833 88,462 81 ,269 28 10 ,056 23,336 38,920 22,262 20,365 19,928 28,454 70,744 76,320 87,919 88,548 80,938 29 8,993 26,682 38 ,154 21,775 *» 19,628 28,846 72,098 76,414 87,962 88,648 80,553 SO 7,905 27,954 37,483 21,380 v 19,240 28,940 74,204 76,556 87,876 88,491 80,033 31 7,005 - 36,788 20,989 - 18,863 " 75,399 ~ 87,890 88,334 - 194 SAN JOAOUIN RIVER BASIN Big Creek below Huntington Lake, Calif. Location.- Water-stage recorder, lat. 37°13'10", long. 119°12'50", In NWi sec. 23, T. 8 S., R. 25 E., 800 feet upstream from Grouse Creek and 1 mile downstream from Huntington Lake. Altitude, about 6,600 feet. Drainage area.- 80.0 square miles. Records available.- June 1925 to September 1938. Records prior.to October 1929 only for periods of spill from Huntington Lake. Extremes.- Maximum discharge during year, 28 second-feet Dec. 11 (gage-height, 3.67 reet); minimum, 0.2 second-foot Nov. 8, 9, and Nov. 27 to Dec. 8. 1925-3B: Maximum discharge, 2,040 second-feet June 23, 1925 (gage height, 10.3 feet), from rating curve defined to 2,000 second-feet, siphon spillways operating at Huntington Lake; minimum, 0.1 second-foot Sept. 10-13, Oct. 7-18, Dec. 5-16, 1931. Remarks.- Records fair. Natural flow of Big Creek is regulated at Huntington Lake and during most of year is diverted for use through Big Creek power house 1. Gage-height record and results of discharge measurements furnished by Southern California Edison Co. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dee. Jan. Feb. Mar. Apr. ««y June July Aug. Sept. 1 0.3 0.3 0.2 0.6 0 7 2,0 0.9 5 11 1.6 0.8 0.6 2 .3 .3 .2 .6 7 6.5 1.1 5 11 1.6 .6 .6 S .3 .3 .2 .6 7 1.7 1.4 4.8 10 1.6 .8 .6 4 ,3 .3 .2 .5 8 1.0 1.6 5.6 e.6 1.6 .8 .6 6 .3 .3 .2 .6 7 .9 1.3 5.6 S.6 1.6 .3 .6 6 .3 .3 .2 .4 7 .8 1.2 6 8 1.6 .9 .6 7 .3 .3 .2 .4 7 .7 1.3 7 8 1.5 2.6 .6 a .3 .2 .2 .4 6 .6 1.6 7.6 7 1.4 1.7 .6 9 .3 .2 .4 .4 7 .6 1.9 8 6.5 1.4 .8 .6 10 .3 .3 6 .4 8 ,6 2.0 9 6 1.4 .3 .6 11 .3 .3 12 .4 1 5 .7 2.3 10 5.6 1.4 .9 .6 12 .3 .3 3.7 .4 S 2.7 2.1 11 6 1.4 2.2 .6 13 .3 .3 1.7 .4 8 a. 2 1.8 13 4.6 1.3 .9 .6 14 .3 .3 1.3 .4 8 1.6 1.7 14 4.0 1.3 2.8 .6 16 .3 .3 .9 .6 8 1.4 1.8 14 3.7 1,3 1.9 .6 16 .3 .3 .8 .4 8 1.3 2.2 14 3.3 1,3 2.3 .6 17 .3 .4 .3 .7 S 1.2 3,1 13 3.1 1.3 1.1 .6 18 .3 .3 .7 .6 8 1.0 4.6 13 % .8 1.2 ,6 .6 19 .3 .3 .6 .6 8 .9 5 12 2.8 1,2 .6 .6 SO .3 .3 .6 .6 8 .9 6 11 2.7 1.2 ,6 .6 SI .3 ,3 .6 .6 8 .9 7 11 2.6 1.1 .6 .5 22 .3 .3 .6 .5 B .8 7.5 12 2.4 .9 .6 .6 23 .3 .3 .6 .6 S .8 7.6 12 2.3 .9 .7 .6 24 .3 .3 .5 .6 9 .8 7 13 2.2 .9 1.3 .6 25 .3 .3 .5 .6 9 .8 6 13 2.1 .9 .7 .6 26 .3 .3 .5 .6 9 .8 6 13 1.9 1.1 .6 .6 27 .3 .2 .5 .6 9 .8 6,6 13 1.8 ,9 .6 .8 28 43 .2 .6 .6 1 3 .9 6,5 12 1.7 .9 .6 .8 29 .3 .2 .5 ,6 _ .8 6.6 12 1.6 .9 .6 .6 30 .3 .2 .6 .6 _ .8 6.6 12 1.6 .9 .7 .6 31 .3 - .6 .6 - .8 - 11 - .8 .6 - Second- Run-off In Honth foot-days KaxlnoD Minimum Mean acre-feet 9 .3 0.3 0.3 0.30 18 8.6 .4 .2 .23 17 36.9 12 .2 1.19 73 668.1 12 .2 1.53 1,100 16.6 .7 .4 .50 31 23 1 1.6 .6 82 46 March...... __ 6 .5 .6 1 24 76 April...... 110 Is 7.6 g 3^69 220 May...... 322.3 14 4.8 10.4 639 143 2 11 1.6 4.77 284 July...... 38 .3 1.6 1J.»<34 PA 76 2 8 !5 1.03 63 17 Is ^8 .6 .58 35 Water year 1937-31B...... 796.5 14 .2 2.18 1,580 SAN JOAQUIN RIVER BASIN 195 Pitman Creek below Tamarack Creek, Calif. Location.- Water-stage recorder, lat. 37°12', long. 119°12', In NWi sec. 35, T. 8 S., R. 25 E., 500 feet dovmstreani from Tamarack Creek, 3 miles upstream from mouth, and 3 miles southeast of village of Big Creek. Altitude, about 7,100 feet. Drainage area.- 22.0 square miles. Records available.- December 1927 to September 1938. Average discharge.- 10 years (1928-38) 37.5 second-feet. Extremes.- Maximum discharge during water year 1936-37, 885 second-feet May 13 (gage height, 6.44 feet); minimum, 0.1 second-foot Nov. 26. Maximum discharge during water year 1937-38, 2,320 second-feet Dec. 11 (gage height, 9.65 feet), from rating curve extended above 1,000 second-feet on basis of velocity-area studies; minimum, 0.1 second-foot Nov. 5. 1927-38: Maximum discharge, that of Dec. 11, 1937; no flow during part of Nov. 24, 1930, and period Oct. 15-13, 1931. Remarks.- Records good except those for periods of Ice effect or of missing gage heights, which are fair. No diversion above station; practically all flow diverted to Huntlngton-Shaver conduit Just below station. Gage-height record and results of several discharge measurements furnished by Southern California Edison Co. Discharge, In second-feet, 1936-38 1936-37 Day Oct. Mov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 0.3 0,8 0.2 170 246 31 3.3 0.5 2 .3 .6 .2 210 256 28 3.1 .5 3 .3 .6 _ 260 265 25 2.9 .5 4 .3 .6 _ 320 275 23 2.2 .5 5 .3 .6 - 356 242 21 2.0 .5 6 .2 ,6 _ 360 210 19 1.8 .4 7 .2 .8 _ 335 190 18 1.7 .4 8 ,2 .5 _ 347 162 16 1.5 .4 9 .2 .4 .. 374 150 15 1.4 .4 10 .2 .4 - 344 141 14 1.5 .4 11 .2 ,4 _ 390 126 14 1.2 .4 12 .2 .4 _ 502 115 16 1.1 .4 13 .2 ,4 _ 580 108 15 1.0 A 14 .2 .4 _ 620 100 13 .9 .4 15 .2 .4 - 600 105 11 .9 .3 16 .2 .4 ^ 580 108 10 .9 .5 17 .3 .4 H 540 94 9.5 .9 .3 IS .4 .4 _ 450 84 8 r8 ,3 19 .8 .4 _ 390 86 8 .8 .3 20 .6 .3 - 415 83 7 .8 ,4 21 .4 ,3 _ 432 78 6.5 ,7 .4 22 .4 .3 -. 401 71 6 .6 .4 83 .5 .3 « 580 62 6 ,6 ,4 24 ,3 .3 _ 412 55 6 .6 .4 25 .3 .3 - 359 50 5 .6 .4 26 .5 .3 _ 315 45 4,7 .6 .3 27 .3 ,3 _ 374 45 4.5 .6 .3 88 .3 .3 _ 412 49 4.2 ,5 .3 89 .3 .2 _ 384 40 4.0 .5 .3 30 .4 .2 _ 295 35 3.7 .5 .3 51 .5 - - 228 - 3.5 ,5 - Note.- Stage-disoharge relation affected by ice Nov. 27 to Apr. 16 and gage heights missing Apr. 18 to May 4, July 26 to Aug. 2; discharge computed on basis of records for Huntington-Shaver con duit at outlet and unpublished records for Pitman Creek. 196 SAN JOAQUIN RIVER BA.SIN Discharge, In second-feet, of Pitman Creek below Tamarack Creek, Calif., 1936-38 Continued 1937-38 Day Oct. Apr. May July Aug. Sept. 0.2 0.3 0.5 736 172 2.3 .2 .3 .5 715 155 2.0 .3 .5 736 138 1.8 .3 .5 100 715 123 1.8 .3 .5 125 614 112 1.6 ,5 143 595 1.4 .4 167 558 1.2 .4 200 614 1.2 231 576 1.2 263 490 941 312 458 8.5 143 358 371 7.5 69 442 334 6.5 1.2 558 358 6.5 1.4 540 398 1.2 474 398 5.5 1.2 35 78 442 358 5.5 1.2 31 111 412 306 5.5 1.8 27 159 334 263 5.5 2.3 24 171 272 232 1.8 23 191 247 247 4.4 1.6 21 214 290 263 4.4 1.4 16 221 398 276 4.0 1.2 13 207 458 282 3.4 1.2 141 474 26V 3.0 1.2 124 523 250 2.7 1.2 134 576 229 2.5 2.7 147 523 196 2.3 9 145 506 168 2.3 3.4 118 558 175 2.7 2.3 634 2.5 Second- Month Run-off In foot-days acre-feet October 1936 ...... 9.7 0.2 0.31 19 November...... 12.3 .2 ,41 24 December...... 170.5 5.5 338 Calendar year 19S6 ...... 15,585.6 30,920 January 1937 ...... 93.0 184 February...... 560 20 1,110 March...... 744 24 1,4SO April...... 2,400 80 4,760 May...... 12,126 620 170 391 24,050 June...... 3,675 275 35 122 7,290 July...... 374.6 3.5 12,1 743 August...... 36.8 3.3 1.19 73 September...... 11.6 ,5 .38 £5 Water year 1936-37 ...... 20,212.4 55.4 40,090 October 1937 ...... 9.4 .4 .30 19 November...... 14.7 1.4 .49 29 December...... 1,741.3 941 56.2 3,450 Calendar year 1937 ...... 21,785.3 .2 59.7 45,210 January 1938 ...... 456 20 13 14.7 904 February...... 397 18 11 14.2 787 March...... 1,137 55 17 36,7 2,260 April...... 2,928 221 SO 97.6 5,810 May...... 10,846 6S4 90 350 21,510 June...... 12,178 736 168 406 24,150 July...... 2,031 172 20 65.5 4,030 August...... 82S.7 18 2,5 7.18 442 September...... 54rS 8 ,9 108 Water year 1937-38 ...... 32,018.6 941 .2 87,7 63,500 Peak discharge.- Dec. 11 (11:30 a.m.) 2,320 sec.-ft.j June 1 (6:30 p.m.) 1,050 sec.-ft.; June 3 (6:30 p.m.) 1,020 sec.-ft. Note.- Stage-discharge relation affected by Ice Dec. 13, 1937, to Apr. 24, 1938; discharge com- puted on basis of records for Huntington-Shaver conduit at outlet and unpublished records for sta tion on Pitman Creek. SAN JOAQUIN RIVER BASIN 197 Shaver Lake near Big Creek, Calif. Location.- Water-stage recorder, lat. 37°09', long. 119 f/18', in SEi sec. 13, T. 93., R. 24 E., at dam on Stevenson Creek 6 miles southwest of village of Big Creek. Records available.- January 1927 to September 1938. Remarks.- Shaver Lake is largest storage unit of Big Creek system of Southern California Edison Co. Elevation of crest of dam is 5,371 feet above mean sea level; elevation of crest of spillway is 5,370 feet above mean sea level (capacity, 135,283 acre-feet). Water is received from Huntington Lake Reservoir and Pitman Creek through Huntington- Shaver conduit and is released through power house 2A on Big Creek. Record of con tents, furnished by Southern California Edison Co., shows amount available for release. Contents, In aore-feet, water year October 1937 to Septenber 1938 D«y Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 69,452 50,098 32 ,733 38,949 31,255 26,842 41,198 33,720 80,941 132,955 135/587 129,091 2 68 ,864 49,363 32,655 39 ,203 30,929 29,130 40/477 33,380 84,114 132,741 135,066 128,367 3 68,689 48,618 32,577 38,961 30,693 30,101 39,778 32,956 87,272 132,956 135,066 127,772 4 67,935 47,848 32,588 38,622 30,542 30,434 39,509 32,532 90,376 133,217 135,044 127,659 5 67,183 46,932 32,588 38,272 30,488 30,768 39,191 32,187 93,530 132,849 135,218 127,155 6 66 ,409 45,904 32,464 37,922 30,542 31,156 38,683 31,902 96,435 132,855 135,044 126,434 7 65,699 45,432 32,332 37,541 30,284 31,255 .38,116 31 ,705 99,465 132,655 135,109 125,674 8 64 ,933 44 ,784 32,265 37,338 29 ,994 31 ,310 37,641 31,617 102,368 132,634 155,022 124,860 9 64,292 44,098 32,432 37,255 29,942 31 ,310 37,028 31,660 105,212 132,720 135,109 124,061 10 64,094 43,368 33,867 36,849 29,984 31,419 37,196 31,781 108,029 133,260 135,109 123,579 11 65,351 42,997 37,541 36,333 29,942 31,705 56,708 32,100 110,899 133,258 135,152 123 ,086 12 62,580 42,289 38,079 35,864 29,594 34,082 36,286 32,566 113,976 133,347 135,109 122,289 13 61,828 41,123 38,308 35,422 29,646 35,665 35,700 33,482 116,593 133,673 135,131 121,393 14 61,092 40,011 38,538 35 ,134 29,204 36,262 35 ,042 35,872 119,149 133 ,934 135,239 120,464 15 60,361 38,852 38,707 35,249 28,662 36,637 34,433 36,802 121,747 134,261 135,131 119,606 16 59,825 37,720 38,792 35,284 28,186 37,183 33,935 38,091 124,303 134 ,622 134,913 118,673 17 59,705 36,754 38 ,852 35,054 27,704 37,588 33,641 39,130 126 ,773 134,304 134,804 118,033 W 58,994 36 ,262 38,925 34,662 27,196 37,958 33,584 40 ,060 129,OO6 134,304 134,543 117,683 19 58,225 35,688 38,997 34,376 27,084 38,345 33,652 40,726 131,340 134,674 134,152 116,922 20 57,519 35,364 39,021 34,003 27,125 39,021 33,788 42,061 133,043 134,783 133,804 116,100 21 56,727 36,238 38,985 33 ,708 26,882 39,362 34,003 45,199 134,021 134,761 133,673 115,099 22 65,942 34,693 39,021 53,607 26,732 39,582 34,274 48,675 133,934 134,717 132,957 114,159 23 65,948 33,912 39,053 33,629 26,502 39,778 34,536 51,698 153,891 134,630 132,418 113,388 24 65,174 33,324 39,045 33,257 26,323 40,060 34,789 54,701 133,918 134,891 132,073 112,779 25 54,445 33,346 39,118 32,856 26,183 40,305 34,754 57,739 134 ,152 134,891 181,706 112,312 26 63,676 33,223 39,154 32,577 26,143 40,602 34,636 60,823 134,600 135,044 131 ,318 111,464 27 52,933 33,134 39,166 32,154 26,205 40,999 34,365 65,967 134,304 135/344 131,038 110,818 28 52,220 33,145 39, ISO 31,880 26,353 41,161 34,229 67,293 134,021 134,913 150,717 110,032 29 61,492 53,034 39,118 31,716 « 41,286 34,138 70,907 133,652 134,717 130,246 109,411 30 60,983 52 ,889 38,997 31,716 _ 41,409 33,844 74,612 133,282 134,652 129,989 108,729 51 50,778 - 58,888 31,568 - 41,646 - 77,752 - 136,087 129,690 - Mote*- Storage In excess of 136,283 acre-feet represents water above crest of spillway. 198 SAN JOAQUIN RIVER BASIN Huntington-Shaver conduit at outlet, Calif. Location.- Water-stage recorder and concrete control, lat. 37°10', long. 119°14', in SWt sec. 10, T. 9 S., R. 25 E., at tunnel outlet, 4 miles south of Big Creel;. Alti tude, about 6,680 feet. Records available.- October 1928 to September 1938. Extremes.- Maximum daily discharge during water year 1937-38, 1,780 second-feet June 3, 4; minimum, 1.6 second-feet, Dec. 4-8. 1928-38: Maximum daily discharge, that of June 3, 4, 1938; minimum, 1.5 second- feet Sept. 12-iC, 1934. Remarks.- Records fair. Conduit diverts water from Huntington Lake to Shaver Lake,with1 additions from Pitman Creek and seepage en route. Records for periods of ice effect, Dec. 10-14, 1936, Dec. 28, 1936 to Feb. 5, 1937, and those for periods of missing or doubtful gage heights, May 2 to Aug. 3, 1936, May 1 to July 31, 1937, Oct. 13 to Nov. 22, 1937, and Apr. 25 to Sept. 2, 1938, were computed on basis of unpublished records for the conduit at intake and for Pitman Creek and its diversion into the conduit. Records for water years 1935-36 and 1936-37,published here,have not been published previously. Gage-height record and results of discharge measurements furnished by Southern California Edison Co. Discharge, In second-feet, 1935-3 1935-36 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 2.5 2.0 2.1 2.1 3,0 6.5 25 783 1,510 478 472 3.2 2 2.F 2.0 2.3 2.3 3.0 Y 24 1,530 1,510 516 340 3.2 3 2.8 2.1 2.5 2,5 3.0 8 24 1,560 1,510 467 70 3.2 4 2.8 2.1 2.5 2.8 3.2 8.5 24 1,590 1,510 334 4,4 3.5 5 2.5 2.1 2.5 3.0 3.5 9 23 1,580 1,510 391 4,4 3.5 6 2.3 2.3 2.3 2,8 3.5 9.5 24 1,560 1,510 505 4,1 3.5 Y 2.3 2.5 2.3 2,8 3.8 10 27 1,540 1,520 544 4.1 3.2 8 2.3 2.5 2.3 2.5 3,8 11 36 1,560 1,510 543 3.8 3.2 9 2.1 2.5 2.3 2.5 3.8 13 45 1,580 1,510 544 3.8 3.2 10 2,1 2.5 2.3 2.5 3 ,8 14 5Y 1,590 1,510 546 3.8 3.0 11 2.3 2.3 2.3 2,8 4.4 16 73 1,600 1,510 499 3.8 3.2 12 2.8 2.3 2.3 2 * 8 5,5 19 92 1,600 1,500 402 3,8 3.2 13 2.5 2.3 2.3 2,8 5.5 21 111 1,610 1,500 471 3.5 3.2 14 2.5 2.1 2.1 2,8 5.5 24 130 1,620 1,500 507 3.5 3.0 15 3.0 2.1 2.1 3,2 4.7 24 154 1,610 Y50 533 3.5 3.0 16 3.0 2.1 2.1 3.0 5 2V 174 1,610 1,030 548 3.5 3.0 17 3.0 2.3 2.0 2.8 5 28 192 1,600 1,480 548 3.5 3.0 18 2.8 2.3 2.0 2,8 5 30 1Y4 1,600 1,470 440 3.5 3,0 19 2.3 2.3 2.0 2,8 5 33 149 1,580 1,070 397 3.5 3,0 20 2.3 2.3 2.0 2,8 5.5 38 184 1,560 301 506 3.5 3,0 21 2.3 2.3 2.1 2,8 6 45 186 1,560 299 600 3.2 3.0 22 2.1 2.3 2.1 2,8 6 54 222 1,5YO 416 634 3.2 3,0 23 2.1 2.3 2.1 2,8 6 46 239 1,580 486 586 3.2 3.0 24 2.1 2.3 2.1 2,8 6 40 239 1,580 491 550 3.2 3.0 25 2.1 2.3 2.1 2.8 6 36 262 1,570 500 404 3.2 3.0 26 £ .1 2.3 2.1 3,0 6 32 292 1,560 488 335 3.2 3.0 27 2.1 2.3 2.1 3.0 7 28 271 1,550 434 422 3.2 3.0 28 2.1 2.3 2.1 3,0 Y.5 2Y 233 1,540 342 546 3,2 3.0 29 2.1 2.3 2,1 3,0 6,5 27 190 1,530 425 450 3.2 3.0 30 2.1 2.3 2.1 3,0 _ 28 161 1,520 482 403 3.2 3,0 31 2,1 - 2,1 3,0 - 2Y 1,520 405 3.2 Hote»- Gage heights missing or doubtful, May 2 to Aug. 3j discharge computed on basis of unpub lished records for stations on Huntlngton-Shaver conduit at Intake and Pitman Creek, SAN JOAQUIN RIVER BASIN Discharge, in second-feet, of Huntington-Shaver conduit at outlet, Calif., 1935-38 .Continued 1936-37 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 3.0 2.3 2,0 5 19 31 695 ,520 267 8 2,1 2 3.0 2.3 2.0 5 19 34 815 ,360 103 7 2.1 3 3.2 2.3 2,0 5 20 33 976 ,270 178 6 2.1 4 3.2 2.3 2.0 6 22 31 1,070 ,200 178 5.5 2.1 5 3.2 2.5 2.0 7 24 31 1,140 ,250 174 5 2.1 6 3.2 2.5 2.0 8.5 25 31 1,170 ,220 79 4.7 2.1 7 3.2 2.5 2.0 15 27 31 1,200 ,190 347 4.4 2.1 8 3.2 2.3 1.8 16 30 33 1,260 ,160 488 4.1 2.1 9 3.2 2.3 1.8 16 31 34 1,330 1,140 698 3.8 2.1 10 3.2 2.3 1.8 17 31 40 1,380 1,140 498 3.8 2.1 11 3.2 2.3 1.8 16 33 44 1,450 1,020 232 3.8 2.3 12 3 2 2.3 1,8 13 33 48 1,560 730 346 3.5 2.3 13 3^2 2.3 1.8 15 32 57 1,600 724 S66 3.5 2.3 14 3 2 2.3 2 *4.Y 36 30 77 1,610 646 384 3.5 2.3 15 3^2 2.3 65 35 29 96 1,640 584 397 3.5 2 3 16 3.2 2 3 60 44 28 97 1,630 588 395 3.2 2.3 17 3.5 2 '.3 15 49 28 90 1,620 576 346 3.2 2.3 18 3.5 2.3 10 43 28 96 1,590 566 101 3.0 2.3 19 3.8 2.3 8 41 27 103 1,560 432 299 3.0 2.3 20 3.8 2.3 7.5 34 27 120 1,580 247 389 3.0 2.3 21 3.8 2.1 6 29 26 148 1,590 762 342 2.8 2.3 22 3.8 2.1 4.4 29 26 139 1,580 821 279 2.8 2.3 23 3.5 2,1 4.4 27 25 121 1,580 802 282 2.8 z'.s2 3 24 3.2 2.1 4.7 .24 24 132 1,590 798 551 2.5 25 3 2 2.1 4.4 23 24 154 1,570 715 402 2,5 2.3 26 3.2 2.1 4.1 21 24 169 1,550 544 298 2.5 2.1 27 3.2 2.1 3.5 19 24 142 1,590 532 324 2,5 2.1 28 3.0 2,1 4 20 23 164 1,610 407 212 2.3 2.0 29 3,0 2.1 4 _ 23 612 1,600 303 169 2,3 2.0 30 3.0 2.0 4 _ 24 633 1,550 334 68 2.3 2,0 31 2.5 - 4 - 2V - 1,510 - 10 2,3 - Note.- Stage-discharge relation affected by ice, Dec. 10-14, Dec. 28 to Feb. 5; discharge computed on basis of one discharge measurement and weather records. Gage heights missing or doubtful. May 1 to July 31; discharge computed on basis of unpublished records for stations on Huntington-Shaver conduit at intake and Pitman Creek, #Discharge measurement. 1937-38 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 2.0 1.9 1.8 20 16 20 33 110 1,770 180 370 54 2 2.0 1.9 .7 23 20 28 35 100 1,760 165 400 7 3 2.0 1.9 .7 22 17 36 41 95 1,780 145 410 4.8 4 2.0 1.9 .6 20 19 38 45 105 1,780 130 410 4.8 5 2.0 1.9 .6 20 18 49 44 125 1,750 120 510 4.5 6 2.0 1.9 .6 19 17 51 41 140 1,740 265 280 4.5 7 2.0 1.9 .6 19 17 39 42 165 1,720 355 170 4.2 8 2,0 1.9 1.6 . 17 17 38 47 200 1,740 350 350 3.9 9 2.0 1.9 3.0 17 18 34 54 230 1,730 340 465 3.9 10 2.0 1.9 133 17 19 31 57 265 1,690 335 445 3.9 11 2.0 2.0 220 17 17 33 64 320 1,680 370 460 3.6 12 2.0 2.0 33 16 14 44 69 370 1,630 430 390 3.6 13 1.9 2.0 30 16 17 56 64 445 1,620 575 360 3.6 14 2.0 2.0 52 16 21 54 59 560 1,620 515 125 3.6 15 2.0 2,1 46 16 17 47 57 540 1,640 550 350 3.3 16 2.0 2.1 40 19 17 45 63 470 1,640 390 275 3.3 17 1,9 3.0 38 19 17 47 81 425 1,620 85 315 3.3 18 1.9 2.5 34 18 16 48 114 390 1,460 375 210 3.6 19 1.9 2.3 30 17 16 44 162 320 1,260 600 135 3.9 20 1.9 2.3 27 16 16 44 174 810 1,220 455 135 3.6 21 1.9 2.3 26 16 16 43 194 1,530 805 385 60 3.3 22 1.9 2.1 24 18 16 41 217 1,540 270 385 12 3.0 23 1.9 2.0 19 17 17 39 224 1,580 285 370 90 2.9 24 1.9 2.0 16 16 17 38 210 1,610 290 275 160 2.9 25 1.9 2.0 20 16 17 38 150 1,600 275 395 150 2.7 26 1.9 2.0 20 17 17 36 130 1,630 260 450 135 2.7 27 1.9 2.0 20 17 17 35 140 1,650 235 410 110 3.6 28 1.9 2.0 20 17 18 35 150 1,670 205 305 35 12 29 1.9 2,0 19 18 34 155 1,670 175 280 100 6 30 1.9 1.8 20 17 _ 33 125 1,690 185 310 245 5 31 1.9 - 20 16 - 32 - 1,710 325 190 Note.- Gage heights missing or doubtful, Oct. 13 to Nov. 22, Apr. 25 to Sept. 2; discharge computed on basis of unpublished records for stations on Huntington-Shaver conduit at intake and Pitman Greek, 800 SAN JQAQUIN RIVER BASIN Discharge, In second-feet, of Huntlngton-Shaver conduit at outlet, Calif., 1935-38 Continued Second- Month H&ximuxn Minimum Mean Run-off In foot-days acre-feet 74.0 3.0 2.1 2.39 147 68.0 2.5 2.0 2.27 135 67.7 2.5 2.0 2.18 134 84,085.2 1,620 2.0 230 166,800 86.4 3.2 2.1 2.79 171 142.5 7.5 3.0 4.91 283 746.5 54 6.5 24.1 1,480 4,037 292 23 135 8,010 May...... 47,943 1,620 783 1,547 95,090 31 ,584 1,620 299 1,053 62,650 15,054 634 334 486 29,860 981.2 472 3.2 31.7 1,950 93.3 3.5 3.0 3.11 185 Water year 1935-36 ...... 100,877.6 1,620 2.0 276 200,100 100.8 3.8 2.5 3.25 200 67.5 2.5 2.0 2.25 134 239.8 65 1.8 7.74 476 Calendar year 1936 ...... 101,076.0 1,620 1.8 276 200,500 155.0 5.0 307 618.5 49 5 22.1 1,230 813 33 19 26.2 1,610 3,571 633 31 119 7,080 May...... 44,196 1,640 695 1,426 87,660 24,581 1,520 247 819 48,760 9,202 698 10 297 18,250 113.1 8 2.3 3.65 224 65.7 2.3 2.0 2.19 130 Water year 1936-37 ...... 83,723.4 1,640 1.8 229 60.4 2.0 1.9 1.95 120 61.5 3,0 1.8 2.05 122 923.2 220 1.6 29.8 Calendar year 1937 ...... 84,360,4 1,640 1.6 231 167,300 549 23 16 IV. 7 1,090 481 21 14 17.2 954 1,230 56 20 39,7 2,440 3,041 224 33 101 6,030 May...... 24 ,065 1,710 95 776 47,730 35,835 1,780 175 1,194 71,080 10,520 600 85 339 20,870 7,852 510 12 253 15,570 175.0 54 2.7 5.83 347 Water year 1937-38 ...... 84,793.1 1,780 1.6 232 168,200 SAM JOAQUIN RIVER BASIN 201 Fine Gold Creek near Friant, Calif. Location.- Water-stage recorder, lat. 37°03', long. 119°39<, In NWi sec. 14, T. 10 S., R. 2,1 E., 1,000 feet downstream from Willow Creek, 14 miles upstream from mouth, and 5i miles northeast of Friant. Altitude, about 680 feet. Drainage area.- 89.2 square miles. Records available.- October 1936 to September 1938. Extremes.- Maximum discharge during year, 10,300 second-feet Mar. 12 (gage height, 20.4 feet, from floodmarks), from rating curve extended above 6,500 second-feet; no flow Oct. 1-14. 1936-38: Maximum discharge, that of Mar. 12, 1938; no flow at times. Remarks.- Records good except those for period of missing gage heights, Mar. 13-16, which were computed on basis of records for Fresno fllver near Knowles and are fair. No storage or diversion above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. HOT. Dec. Jen. Feb. Mar. Apr. Hay June July Aug. Sept. 1 0 2.1 3.7 12 524 1,100 142 110 29 11 3.7 3.0 2 0 2.3 3.7 14 274 3,200 137 106 27 10 3.6 3.0 S 0 2,3 3.7 21 738 3,000 131 102 25 9.5 3.5 3.0 4 0 2*.l2 3 3.7 14 808 1,510 133 93 24 9.5 3.5 3.0 E 0 3*9 13 452 780 306 89 24 S.5 3.5 3.1 6 0 2.1 3.9 13 237 603 174 86 23 8.5 3.5 3,1 7 0 2,3 4.1 12 174 500 152 80 24 S 3,5 3.1 8 0 2,6 4.1 12 154 1,040 138 77 24 7.5 3.5 3.1 9 0 2.7 5.5 12 440 590 133 73 24 7 3.5 3.1 10 0 2.7 397 12 270 452 133 71 25 7 3.6 3.1 11 0 3.2 L,610 11 3,950 405 133 69 26 6.5 3.6 3.1 12 0 4,3 392 11 1,320 2,460 134 65 26 6.5 3.5 3.0 19 0 3,7 91 11 616 3,200 194 64 26 6.5 3.5 3.0 14 0 3,5 44 67 1,140 1,200 164 61 24 6 3,5 2.9 IE 0.5 3.5 30 1,030 603 800 143 57 23 6 3.5 2.9 16 1.6 3.5 24 1S1 42S 650 137 67 21 5.5 3,6 2.9 17 1.7 4.1 20 173 306 615 131 58 20 5.5 3.7 3.0 18 1.7 4.6 17 104 360 430 121 55 20 5 3.8 3.2 19 1,6 3,9 16 100 792 305 US 53 20 5 3.9 3.1 SO Ir6 3.7 15 141 361 567 114 53 20 5 3.S 3.1 21 1.5 3,7 14 81 282 385 109 60 19 4.S 3.6 3.1 22 1,3 3.7 14 66 237 240 107 48 17 4.6 3.5 3.0 23 1,2 3.7 23 55 201 206 103 45 16 4.5 3,6 3.0 24 1.2 3.7 17 49 192 447 107 42 15 4.2 3,6 3.1 25 1.4 3.7 14 44 174 255 186 38 13 4.1 3.6 3.3 26 1.5 3.7 14 41 170 185 13S 36 12 4.5 3.6 3.4 27 1.5 3.9 13 39 157 170 117 33 12 5.5 3.4 3.5 28 1.5 3.9 12 53 210 177 109 32 11 5 3.3 4.5 29 1.6 3.7 12 205 H 170 109 32 11 4.6 3.2 4.5 SO 1.8 3,7 12 92 _ 154 114 31 11 4,2 3.1 4.1 31 2.0 - 12 100 - 149 30 4.0 3.1 Second- Run-off In Month foot-days MfHy*fH\nH Minimum Mean acre-feet October...... 25.2 2,0 0 0*81 50 HoYenber ...... * .... 93 9 4.6 2.1 5*30 196 2 ,849 .3 1,610 3,7 Q-]Crj.rO Q 5,650 29 r056,6 3,910 0 79.6 57,630 2,794 1,030 11 556*90 X 5,540 15,560 3,950 154 30,360 March ...... 25,945 3,200 149 837 51 ,460 April...... 4,162 306 103 139 8,260 May...... 1 ,896 110 30 61*-2 3,760 612 29 11 20 4 1,210 July...... 194.0 11 4.0 6*26 586 109,3 3.9 3.1 3.53 217 September...... 96,3 4.5 2.9 3.21 191 Water year 1937-3 54,348.0 3,950 0 149 107,800 Peak discharge.., Feb. 11 (I2i30 p.m.) 6,450 sec.-ft.5 H«r. 2 (11 a.»,) 8,140 see.-ft.j Mar. 12 (about 9 p.m.) 10,300 sec.-ft. 202 FRESNO RIVER BASIN Fresno River near Knowles, Calif. Location.- Water-stage recorder and concrete control, lat. 37°14', long. 119°46', in NWt sec. 15, T. 8 S., R. 20 E,, at Fresno Crossing, 0.1 mile downstream from Bean Gulch and 6 miles northeast of Knowles. Altitude, about 1,140 feet. Drainage area.- 132 square miles. Records available.- September 1911 to December 1913 (erroneous dates published in previous reports); November 1915 to September 1938. Average discharge.- 23 years (1911-12, 1916-38), 78.3 second-feet. Extremes.- Maximum discharge during year, 7,630 second-feet Mar. 12 (gage height, 8.67 feet); minimum, 3.7 second-feet Oct. 2 (gage height, 1.02 foot). 1911-13; 1915-38: Maximum discharge, that of Mar. 12, 1938, no flow at times dur ing 1919, 1924, 1926, 1928-31, 1933-34. Remarks.- Records good. Discharge for period of missing gage heights, Aug. 13-16, com- puted on basis of readings on staff gage at the measuring cable. Water is diverted into Fresno River basin from San Joaquin and Merced River basins. Small diversions above station for irrigation. Rating table, water year 193V-38 (gage height, in feet, and discharge, in seoond-feet) 1.0 3.0 1.6 70 2.3 3VO 3.2 990 4.5 2,220 1.2 11.5 1,8 132 2.6 545 3.5 1,250 5.0 2,720 4,760 1.4 31 2.0 216 2.9 750 4.0 1,720 5.5 3,270 Discharge, In second-feet, water year October 1937 to September 1938 Day oet. HOT. Dec. Jan. Feb. Har. Apr. ay June July Aug. Sept. 1 5.5 10 18 26 575 1,270 364 348 256 172 48 23 2 5 14 18 30 443 3,280 359 437 256 1S1 45 21 S 7.5 18 18 48 1,580 2,670 364 348 246 177 43 19 4 10 13 17 36 996 1,590 398 320 242 172 41 17 5 12 9.5 17 33 503 1,050 830 315 242 164 40 18 6 11 9,5 18 31 342 814 491 290 237 156 40 18 7 11 9.5 18 30 275 694 420 280 237 148 40 18 8 10 10 17 29 242 1,140 386 270 227 140 38 19 9 9 10 19 27 624 743 386 270 227 132 36 19 10 9.5 11 517 26 597 617 359 260 227 129 34 18 11 8.5 13 1,4SO 26 4,710 638 348 2S5 223 122 33 17 12 8.5 19 488 26 1,440 2,890 348 260 223 118 31 17 13 9 19 136 26 729 4,020 414 260 218 115 31 17 14 9,5 19 81 95 1,150 1,570 370 280 209 108 31 16 16 11 20 59 846 673 1,140 337 295 209 105 31 15 16 13 19 50 246 503 1,090 342 270 209 101 31 14 17 12 20 43 232 398 1,020 342 290 213 95 31 14 18 12 34 38 190 466 766 359 265 218 92 31 14 19 10 25 34 160 790 680 364 256 223 87 30 14 20 10 20 33 164 437 998 348 256 223 81 31 14 21 8.5 19 31 118 370 736 337 251 216 78 29 13 22 9 19 31 101 332 604 332 237 213 73 29 12 23 7 18 40 90 305 552 326 237 213 70 29 12 24 8 18 34 81 290 1,050 359 237 21S 66 25 12 25 8.5 18 30 76 260 687 558 237 213 63 24 12 26 8.5 18 29 70 242 558 408 232 209 66 24 12 27 8.5 18 29 66 227 503 364 223 204 76 23 13 28 7.5 17 29 94 379 497 342 223 200 66 21 19 29 9.5 17 27 43 _ 455 364 256 186 61 21 21 60 9 17 27 122 « 403 376 256 181 57 24 18 31 10 - 27 141 - 381 256 52 24 Second- Run-off In Month foot -days Maximum Minimum Mean acre-feet 288,0 13 5 571 501.5 34 9,5 16.7 995 3,453 1,480 17 111 6,850 Calendar year 1937 ...... 52,139.8 4,020 3.0 143 103,400 846 26 107 6,600 19,880 4,710 227 710 39,430 -1 "10 35,106 4,020 381 1 j-LO(O 69,630 April ...... 11,695 830 326 390 23,200 8,480 437 274 16,820 6,620 256 181 221 13,130 July...... 3,323 52 107 6,590 989 48 21 31 9 1,960 486 23 12 16 '.S 964 Water year 1937-38...... 94,150.5 4,710 5 256 186,700 Peak dlscharg i.- Feb. 11 (11:30 a.m.) 7,180 seo.-ft.j Mar. 12 (5 p.m.) 7,630 sec.-ft.; Mar. 13 (5:30 a.m.) 6,6 '0 sec.-ft. CHOWCHILLA RIVER BASIN 203 Chowchilla River at Buchanan dam site, Calif. Location.- Water-stage recorder, lat. 37°13', long. 120°00', in SWi sec. 22, T. 8 S., R. 18 E., 1.4 miles upstream from Raynor Creek and 5 miles west of Raymond. Altitude, about 390 feet. Drainage area.- 238 square miles. Records available.- October 1921 to September 1923, October 1930 to September 1938. Extremes - Maximum discharge during year, 15,000 second-feet Mar. 2 (gage height, 14.4 reet, from floodmarks), from rating curve extended above 5,000 second-feet; minimum, 1.0 second-foot Oct. 2. 1921-23, 1930-38: Maximum discharge, that of Mar. 2, 1938; no flow for part of each year except 1937 and 1938. Remarks.- Records good except those for periods of missing gage heights, Mar. 2 to Apr. 6, Aug. 8-11, which were computed on basis of records for Fresno River near Knowles and are fair. No large diversions above station. Discharge, In second-feet, water year October 1937to September 1958 Day Oct. SOT. Dec. Jan. Feb. Mar. Apr. fay June July Aug. Sept. 1 1.4 3.1 8 24 1,200 1,790 420 334 98 39 9.5 5 2 1.6 3.2 7 26 S78 410 360 91 35 8.5 4.7 S 2.0 3.7 7 56 3,300 420 321 85 34 8 4.6 4 2.1 3.7 7 45 1,920 460 284 80 34 8 4.4 6 2.3 3.6 7 33 932 1,100 272 77 33 7.5 4.6 6 2.9 3,7 7 31 556 575 260 76 31 7 4.4 7 3.0 3,7 7 30 442 504 244 75 30 7 4.7 a 2.7 3.7 7 29 400 457 232 70 28 7 4.7 9 2.4 4,0 11 27 1,080 442 224 67 27 7 4.7 10 1.9 4.3 615 26 1,020 428 217 66 25 7 4.6 11 1.6 4.7 2,340 24 7,760 400 208 67 24 7 4.6 12 1.4 6 835 24 2,530 400 203 68 23 7 4.3 IS 1.6 8,5 279 24 1,210 428 196 67 22 6.5 4.0 14 1,9 7.5 152 26 2,370 400 190 63 21 6.5 4.2 16 2.2 6,5 94 2,840 1,280 360 184 59 20 6.5 4.2 16 2.6 6,5 69 705 932 347 182 55 19 6.5 4.0 17 3.1 6 53 457 750 334 189 53 19 6.5 4.0 18 3.1 10 43 386 728 332 177 51 19 7 4.4 19 3.1 15 38 278 1,080 334 164 51 17 7 4.3 20 3.1 12 36 386 705 327 161 57 16 7 4.4 21 2.9 10 32 252 615 306, 162 63 15 7 4.3 22 2.7 9,5 30 196 575 295 148 55 14 6.5 4.0 23 2,4 9 35 164 538 268 141 51 13 7 4.0 24 2,3 S.5 47 139 521 297 134 47 12 7 4.2 25 2.2 8.5 34 122 457 488 125 43 12 6.5 4.6 26 2.2 8.5 31 110 428 373 121 40 13 6 4.7 27 2.4 8.5 28 104 400 312 117 38 15 6 5.5 28 2.6 9 27 100 414 295 113 36 15 5.5 6.5 29 2.6 9 26 175 ^ 312 114 36 12 5 9 50 2.6 9 26 206 _ 360 109 40 11 5 e.5 31 2.9 - 24 172 - - 104 10 5 - Second- Rim-«ff In Honth foot-daya *«!* » Mlnta*. Hean aore-feet October...... 73.8 3.1 1.4 2 ,38 146 211.0 .15 3*X 160* 419 4,962 2,340 7 9,840 Calendar year 1937 ...... 72,330.9 8,890 ,4 198 143,500 7,217 2,840 24 233 14,310 35,021 7,760 400 1,251 69,460 62 f 000 2,000 123,000 April...... 12 204 1,100 288 407 24,210 5^990 360 104 193 11 860 1,825 98 36 60,8 3)620 July...... 656 39 10 21 2 1,310 2X0*5 9.5 5 6 79 418 144.1 9 4.0 4isO 286 Water year 1937-Z>8...... 130,516.4 - 1.4 358 258,900 Peak discharge.- Feb. 11 (10{30 a.m.) 12,700 aec.-ft.; Mar. 2, 15,000 see.-ft.; Mar, 12, 10,900 aeo.-ft. 204 MERCED RIVER BASIN Merced River at Happy Isles Bridge, near Yosemite, Calif. Location.- Water-stage recorder, lat. 37°43'54", long. 119 033'28", at Happy Isles Bridge, 0.4 mile downstream from Illilouette Creek, and li miles southeast of Yosemite Lodge in Yosemite National Park, Mariposa County. Altitude, about 4,000 feet. Drainage area.- 181 square miles. Records available.- August 1915 to September 1938. Average discharge.- 23 years, 329 second-feet. Extremes.- Maximum discharge during year, 10,600 second-feet Dec. 11 (gage height, 10.4 feet), from rating curve extended above 4,000 second-feet on basis of velocity-area studies; minimum, 3.7 second-feet Oct. 27. 1915-38: Maximum discharge, that of Dec. 11, 1937; minimum, 1.5 second-feet Sept. 30, 1926. Remarks.- Records good except those for days of missing gage heights, Nov. 17, 18, which were computed on basis of records for Merced River at Pohono Bridge and Tenaya Creek near Yosemite, and are fair. Small diversion above station for water supply of Yosemite Valley. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. lor. Dec. Jan. Feb. Mar. Apr. M*y June July Aug. Sept. 1 6.5 4.6 14 84 92 158 160 644 3,580 1,920 660 168 6.5 4.6 14 92 101 267 196 622 3,830 2,110 601 138 6.5 4.3 13 87 98 261 242 564 3,330 1,870 672 128 4 6.5 4.1 12 80 101 239 279 676 4,010 1,440 472 122 6.5 4.3 12 78 118 206 273 601 3,420 1,370 421 116 6 6 4.6 11 71 116 183 242 666 3,260 1,440 421 104 6 4.6 11 71 118 168 247 760 3,340 1,560 442 93 6 4,9 11 69 113 IBS 297 860 3,420 1,600 442 81 5.5 4.9 15 66 116 140 361 1,070 3,420 1,480 386 74 5 4.9 960 66 118 134 389 1,340 3,120 1,340 310 69 11 4.9 6.5 5,380 64 94 146 442 1,650 2,780 1,200 261 63 4.1 7.5 1,700 66 118 270 442 2,060 2,210 1,000 244 62 4.9 7 644 64 151 266 372 2,660 1,740 915 239 62 14 6 8.5 432 66 154 220 332 3,180 1,960 1,040 233 81 7 8.5 353 90 143 206 342 3,340 2,420 1,130 212 60 16 7 8.5 288 87 140 217 424 2,980 2,780 1,200 201 69 7 16 268 98 120 204 801 2,780 2,480 1,230 189 61 6 20 225 96 92 138 945 2,660 2,280 1,130 193 83 6 13 183 90 79 178 1,260 2,210 1,960 1,000 173 62 6 17 168 81 99 201 1,340 1,740 1,410 1,000 160 69 21 6 28 149 87 109 168 1,410 1,410 1,340 1,OOO 160 57 SB 5.5 21 128 92 104 168 1,440 1,480 1,740 975 161 64 5.6 20 118 84 108 160 1,440 1,960 2,110 916 180 61 5 20 102 79 113 163 1,340 2,420 2,480 835 180 49 4,9 18 104 79 113 164 1,040 2,720 2,780 888 173 48 26 4.6 17 99 83 US 149 860 2,840 2,840 1,480 170 46 16 96 86 116 149 860 3,340 2,780 1,370 163 70 SB 4.6 16 90 86 126 168 855 2,980 2,360 846 164 580 29 4.6 15 90 88 «, 168 835 2,600 1,870 786 145 348 4.3 15 87 80 _ 151 712 2,720 1,660 712 164 260 4.6 - 84 86 - 149 - 3,120 - 644 186 Seoond- Run-off In Month foot-days M&xljBun Minimum Mean acre-feet December...... 11,860 6,380 11 383 25,620 149,611.6 5,580 4.1 410 298,800 g 494 68 6,310 March...... Ihy...... 78,090 4,010 1,540 2,036 156,800 Jilly...... 37,624 2,110 844 1,210 74,480 £* 8,677 801 146 277 17,010 Sep 3,264 680 48 108 6,450 Water year 1937-3 232,769.1 5,380 4.1 638 461,700 Peak discharge.- Dec. 11 (l»30 p. .) 10,600 seo.-ft.j June 1 (12 p.m.) 4,370 sec.-ft.; June 4 (1 a.m.) 4,660 sec.-ft. MERCED RIVER BASIN 205 Merced River at Pohono Bridge, near Yosemlte, Calif. Location.- Water-stage recorder, lat. 37°43 I 01", long. 119°39'55", 0.4 mile upstream from Artist Creek and 5 miles downstream from Yosemlte Lodge In Yosemlte National Park, Mariposa County. Altitude, about 3,870 feet. Drainage area.- 321 souare miles. Records available.- November 1916 to September 1938. Average discharge.- 21 years (1917-38), 567 second-feet. Extremes.- Maximum discharge during year, 22,000 second-feet Dec. 11 (gage height, 19.1 reet), by computation of flow over diversion dam for Yosemlte power house,about one mile downstream; minimum,21 second-feet Oct. 23 to Nov. 8. 1916-38: Maximum discharge, that of Dec. 11, 1937; minimum, 3.3 second-feet Sept. 29, Oct. 1, 1924. Remarks.- Records excellent except those for periods of missing gage heights, Dec. 13- 21, Mar. 27-29, July 8-20 and Sept. 21-30, which were computed on basis of records for station at Happy Isles Bridge and are fair. Small diversion above station for water supply of Yosemlte Valley. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. or. Dea. Jan. Feb. Mar. Apr. «*7 Jane July Aug. Sept. 1 23 21 29 209 215 407 407 1,270 7,040 2,640 758 211 8 23 21 28 229, 227 , 680 471 1,240 7,640 2,820 758 190 5 24 21 27 216 262 659 579 1,100 7,240 2,660 735 177 4 25 21 27 207 234 560 680 1,120 7,840 2,080 625 171 6 25 21 26 199 243 471 680 1,210 6,500 1,940 546 168 6 25 21 85 185 245 439 579 1,350 6,160 2,010 526 157 7 25 21 25 180 240 407 579 1,530 6,520 2,080 565 144 8 24 21 25 178 243 407 659 1,700 6,320 2,100 546 153 9 24 22 43 169 266 366 790 2,040 6,320 2,000 490 184 10 24 22 3,030 166 283 357 835 2,650 5,520 1,850 410 118 11 82 25 16,000 164 278 577 935 3,150 4,960 1,650 560 115 12 22 25 6,420 161 290 680 960 3,840 3,960 1,450 318 114 13 82 26 3,000 158 281 723 836 4,890 3,200 1,560 309 111 14 24 26 1,200 171 321 660 723 6,120 3,400 1,400 304 110 16 24 25 900 249 893 541 723 7,240 4,080 1,500 285 108 16 24 25 700 223 266 579 886 6,180 4,560 1,550 270 107 17 22 36 600 254 238 641 1,810 5,480 4,200 1,600 267 105 18 28 39 500 843 245 606 1,840 5,180 3,730 1,500 262 108 19 22 32 450 227 823 488 2,460 4,090 3,200 1,500 243 110 SO 32 30 400 205 227 560 2,650 3,370 2,480 1,500 224 107 Si 22 46 550 211 859 471 2,640 2,640 2,400 1,280 282 105 88 82 40 300 887 262 471 2,840 2,840 2,820 1,880 220 100 25 21 36 871 207 264 471 2,740 5,720 3,800 1,190 231 96 84 21 36 838 197 873 SCO *,640 4,610 3,750 1,070 238 95 25 21 84 236 199 881 488 8,040 5,350 3,960 1,100 226 90 26 81 52 229 805 276 466 1,670 6,460 3,980 1,730 224 90 87 21 51 821 211 878 440 1,670 6 ,480 3,840 1,700 213 90 SB 21 SO 215 215 300 480 1,700 6,120 3,400 1,190 206 525 89 21 30 811 211 w 400 1,780 5,030 2,750 1,010 194 440 so 21 29 813 195 _ 589 1,460 5,330 2,400 950 198 285 31 21 - 807 206 - 589 - 6,120 - 850 251 - Second- Run-off In Month foot-days u^intr Minimum Mean aore-feet 701 26 21 82.6 1,590 844 46 81 28.1 l',670 December...... 3(8,146 16,000 25 1,166 71,690 Calendar year 1937...... 888,744 16 ,OOO 81 776 560,800 6,276 364 158 202 12,450 7 .SOT. 381 215 260 14,460 Maron...... ;...... le^ei 723 367 498 3O,870 April...... 40,660 2,840 407 1,362 80,460 to...... 118,270 7,840 1,100 5,815 i£O4OtU. yvUUJtftfi 187,110 7,840 2,400 4,670 m fUvUt\f\r\ July...... 49,950 2,820 850 1,611 99,050 11,188 7S8 192 581 2£fl£H) 4,603 525 90 155 9,150 Water year 1937-2 8...... 488,176 16,OOO 81 1,175 849,300 aoharae.- Dec. 11 (about 5 p.m.) 82,000 me.-ft.} Jan* 8 (5 a.».) 8,700 ne«,-ft.j June 4 B,9ZD aee.-ft. 206 MERCED RIVER BASIN Merced River at Klttrldge, Calif. Location.- Water-stage recorder, lat. 37°39', long. 120°11', In sec. 26, T. 3 S., R. 16 E., 0.2 mile downstream from Whites Gulch, a quarter of a mile downstream from Klttridge, and 3 miles upstream from Horseshoe Bend. Altitude, about 750 feet. Drainage area.- 935 square miles. Records available.- November 1928 to September 1938. November 1922 to November 1928 at site 14 miles downstream. Average discharge.- 12 years (1923-27, 1929-30, 1931-38), 1,200 second-feet. Extremes.- Maximum discharge during year, 59,000 second-feet Dec. 11 (gage height, 31.0 feet, from floodmarks), from rating curve extended above 11,000 second-feet on basis of velocity-area studies, and records of storage increase in Lake McClure; minimum, 56 second-feet Oct. 1. 1922-38: Maximum discharge, that of Dec. 11, 1937; minimum, 13 second-feet Oct. 5, 1925. Remarks.- Records good except those for periods of missing gage heights, Oct. 20 to Dec. 15, July 18-22,and Sept. 26-30, which were computed on basis of occasional staff gage readings, partial recorder graph, records of storage in Lake McClure and records for station at Pohono Bridge and are fair. No large diversion above station. Discharge, In second-feet, water year October 1937to September 1938 Day Oct. HOT. Deo. Jan. Feb. Bar. Apr. May June July Aug. Sept. 1 58 66 98 482 4,080 4,840 1,950 3,440 11,000 3,990 990 324 2 61 66 94 544 2,910 17,500 1,990 3,660 11,700 4,230 940 281 3 66 66 92 685 8,700 11,600 2,240 3,130 11,500 3,990 940 254 4 71 67 92 B8O 4,050 7,200 2,550 3,030 12,100 3,330 850 246 6 72 67 90 520 2,820 4,700 4,220 3,230 10,600 2,930 760 234 6 71 68 90 499 1,980 3,660 2,930 3,330 10,300 2,930 680 232 7 68 68 89 457 1,560 3,030 2,600 3,660 10,300 3,030 660 214 8 67 69 S9 443 1,320 3,O30 2,600 3,990 9,920 3,030 660 200 9 65 69 89 422 2,770 2,600 2,730 4,460 10,300 2,930 660 186 10 63 70 4,430 409 6,860 2,320 2,830 6,210 9,200 2,«00 640 177 11 62 75 32,100 397 20,600 2,240 2,930 6,020 8,340 2,320 582 167 12 62 85 12,800 391 8,580 9,030 3,030 7,800 6,600 2,030 530 169 13 62 98 4,070 391 4,170 15,100 2,830 9,020 5,470 1,840 466 166 14 63 105 2,300 391 6,400 7,840 2,600 10,800 5,600 1,840 436 154 16 72 110 1,710 7,650 3,940 5,210 2,320 12,300 8,600 1,950 406 162 16 88 105 1,420 2,020 2,820 4,700 2,600 11,200 7,520 1,950 406 148 17 79 101 1,230 1,660 2,220 4,700 3,030 9,740 6,760 1,990 378 146 18 76 130 1,080 1,320 1,940 3,880 4,220 9,380 6,160 1,960 372 144 19 74 150 975 1,060 2,380 3,330 5,600 7,840 5,340 2,030 367 149 20 70 135 870 976 1,940 4,100 5,740 6,500 4,220 1,800 342 154 21 70 125 798 798 1,740 3,770 6,880 5,340 3,770 1,660 322 149 22 70 115 776 752 1,700 3,130 6,020 6,210 4,630 1,530 319 146 23 66 110 798 708 1,660 2,830 6,180 8,600 6,210 1,530 319 138 24 66 108 686 eoo 1,660 3,880 6,020 8,000 6,020 1,580 332 134 25 64 106 620 552 1,690 3,230 5,210 9,200 6,300 1,360 324 132 26 63 105 600 540 1,480 2,830 4,220 9,380 6,160 1,700 312 130 27 63 104 680 540 1,380 2^00 3,990 10,300 6,020 2,420 302 131 28 63 104 548 532 1,690 2,650 4,100 10,300 6,470 1,660 290 270 29 64 102 602 640 2,420 4,220 8,610 4,460 1,330 281 760 30 65 100 492 580 2,160 3,880 8,680 3,770 1,190 269 466 31 65 492 926 I r990 10,100 1,090 276 Secand- Month Run-off in foot-days Maximum lilnimun Mean acre-feet Oot 2,08* 88 58 67.3 4,140 Hov 2,845 150 66 95,0 5,660 Dec 70^98 32,100 89 2,281 140,200 Calendar year 1937 ...... 638,498 32,100 56 1,V49 1,266,000 Jan nary 28,463 7,650 391 918 56,460 Fefc 103,840 20,600 1,320 3,701 205,600 Mar 161,890 17,600 1,990 4,900 301,300 Apr 110,940 6,160 1,950 3,698 220,000 ¥* 213,560 12,300 3,030 7,050 433,600 Jim 221,280 12,100 3,770 7,576 438,900 Jul 69,630 4 ,£20 1,090 2,243 137,900 £*ust...... ,,,. 15,411 990 269 497 30,570 Sep 6,532 760 130 211 12,560 water year 193V-38...... 1,001,679 32,100 58 2,744 1,987,000 Peak discharge ,- Dec. 11 about 3 f.m.) 69,000 sec. -ft.; Feb. 11 (9t30 a.a.) 27,300 seo.-ft.: n»r» B (atxntt T p»a .) 50,400 soo.-ft, MERCED RIVER BASIN 207 Lake McClure at Exchequer, Calif. Location.- Staff gage, lat. 37°35', long. 120°16', in SWi sec. 13, T. 4 S., R. 15 E., at Exchequer Dam on Merced River, 5 miles northeast of village of Merced Falls. Zero of gage Is at mean sea level. Drainage area.- 1,020 square miles. Records available.- April 1926 to September 1938. Remarks.- Lake McClure is main storage unit of Merced Irrigation District. Elevation of crest of dam is 714.0 feet, that of top of spillway gate 707.0 feet, and that of spill way 693.0 feet above mean sea level (capacity, 245,600 acre-feet). Released water passes through power house at dam and down Merced River to diversion dam downstream from Merced Falls, where it enters main irrigation canal. Records of contents for years 1933-38, based on revised capacity table, are shown below. Gage-height record furnished by Merced Irrigation District. Contents, in aero-feet, 1932-38 1932-33 D«y Oct. HOT. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 89 ,420 64,600 64,820 67,570 80,020 49,550 64,930 76,060 129,700 218,650 146,130 55,100 Z 87,730 64,600 64,930 67,680 79,420 49,370 65,480 75,700 136 ,440 217,040 143,070 5S,600 3 86,040 64,600 64,930 67 ,680 78,100 49,280 66,470 74 ,930 14B,220 215,430 139 ,670 49,730 4 84,820 64,600 65,040 67,780 76,660 49,910 68,140 74,140 145,620 214,100 136,610 47,1BO 5 82,400 64,600 65,040 67,900 75 ,220 50,600 70,060 73,660 148,340 212,340 133,540 44,780 6 80,740 64 ,600 65,150 68,020 73,860 51,300 71 ,860 72 ,820 151,580 210,800 130,660 42 ,080 7 78 ,940 64,600 65,150 68,020 72,340 52, BOO 72,940 72,100 156,260 209,040 127,620 39,«40 8 77,260 64,600 65,260 68,140 70,900 53,300 73,4BO 71,860 161,840 207,500 124,580 37,320 9 75,580 64,600 65,260 68,260 69,220 54,300 73,420 71 ,500 168,180 205,520 121,700 35,080 10 73,780 64 ,600 65,260 68,380 67,570 54,500 73,060 71,260 174,600 203,570 118,700 SB ,750 11 72,100 64,600 65 ,370 68,500 66,850 54,500 72 ,700 70,900 181,100 201,470 115,850 30,510 12 70, SCO 64,800 65,370 68,620 64,930 54,700 72,340 70 ,420 188,300 199,370 112,700 88, BOO 13 68,500 64,600 65 ,480 68,620 64 ,270 55 ,800 72,220 70 ,180 195,380 197,060 109,700 85,990 14 66,800 64,600 65 ,480 68,740 63,170 56,100 72,820 69,940 202,520 194,960 106,700 83,700 15 65,150 64,600 65,480 68,860 61,960 56,200 74,260 69,940 209,260 192,650 103,760 SI ,360 16 65,040 64,600 65,480 68,980 60,640 56,200 75,820 69 ,820 314,320 190,550 100,680 19,100 17 65 ,040 64,600 65,590 69,220 59,430 60 ,480 76 ,420 69,460 318,480 188,100 97,740 16,850 18 64 ,8SO 64 ,600 65,700 69,340 58,220 61,740 76,300 68,860 220,720 1.85,700 94,660 14,600 19 64,710 64,600 65 ,810 70,300 57,100 62,6BO 75,820 68,500 28S.100 L83 ,300 91,890 12,500 20 6/4,710 64,710 65,980 70,900 55,800 63,170 74,860 68,380 223,020 180,700 88,900 10,440 SI 64,600 64,710 66,140 71,380 54,500 63,830 74,020 69,580 383,710 177,900 86,170 9,390 22 64,600 64,710 66-,S50 71,740 53,300 64,270 73,660 70,420 224,170 175 ,100 83,050 8,300 23 64,600 64,710 66,470 72,460 52,100 64,490 73,780 70,900 324,400 172,360 80 ,140 7,400 24 64 ,600 64,710 66,690 73,180 50,900 64 ,600 73,900 72 ,460 224,400 169,510 77,380 7,280 26 64,600 64,710 66,800 74,260 50,600 64,600 74,020 75,820 324,170 166,470 74,500 7,000 26 64,600 64,710 66,910 74,860 50,200 64,490 74,020 80,860 323,710 163,640 71 ,740 6,700 27 64 ,600 64,710 67,080 75,700 49 ,910 64,270 73,900 86,950 322,790 160,940 68 ,860 6,200 28 64,600 64,710 67,130 77,140 49,730 64 ,380 74,620 94,380 222,100 L5S,480 66,140 6,100 29 64,600 64,710 67,240 78,460 64,930 75,700 103,060 321,180 155,360 63 ,280 5,820 SO 64,600 64,710 67,350 79,540 64,930 76,180 111,650 319,800 152,300 60,480 5,580 31 64,600 67,460 80,260 64,930 120,950 149,190 57,300 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 5,220 4,910 5,820 30,510 52,300 95,920 140,180 140,520 123,780 91 ,240 17,100 7,550 2 5,130 5,020 5,860 35,300 52,800 97,320 140,180 140,180 122,980 88,900 16,650 7,320 3 5,110 5,090 5,900 37,080 53,500 99,140 140,010 139,670 122,020 86,690 16,300 7,050 4 5,090 5,150 5,940 38,360 54,100 101,100 139,160 139,160 120,800 84,820 16,000 6,780 5 5,090 5,180 6,020 39,400 54,6OO 102,920 138,310 139,160 119,460 81,680 15,600 6,600 6 5,080 5,220 6,080 40,800 55,200 105,160 137,630 139,330 118,550 79,300 15,280 6,260 7 5,060 5,860 6,180 40,840 56,000 107,150 137,290 139 ,840 117,950 76,780 14,980 6,000 8 5/360 5,B90 6,160 41,640 56,700 109,100 137,290 140,350 117,850 74,260 14,560 5,740 9 5,040 5,310 6,200 48,170 57,700 111,050 137,290 140,360 117,500 71,620 14,240 5,480 10 5,080 5,350 6,840 42,800 58,550 112,700 137,460 140,350 117,500 63,740 13,960 5,180 11 5,020 5,360 6,300 43,340 69,210 114,500 137,630 140,360 117,200 66,140 13,600 4,900 12 5,000 5.400 6,420 43,830 59,870 116,150 139,970 140,360 118,460 63,390 13,880 4,610 13 5,000 5,420 9,990 44,420 60,420 118,100 158,480 140,350 116,160 60,640 13,000 4,320 14 5,000 5,440 12,320 44,780 60,970 120,200 138,820 140,010 116,450 57,800 12 ,680 4,000 15 4,990 5,480 13,800 45,140 61 ,630 122,340 139,840 139,670 116,750 55,100 18,390 16 4,950 5,480 14,740 45 ,690 63,500 124,900 140,350 138,990 116,600 52,400 IS ,080 ^, 17 4,900 5,500 15,370 46,040 64,600 127,140 140,860 138,990 116,150 49,560 11,760 18 4,860 5,680 15,860 46,310 65,040 129,540 141,030 137,180 115,400 46,850 11,440 19 4,840 5,580 16,B50 46,670 67,670 130,820 141,370 136,100 114,600 44,060 11,130 _ 20 4,810 5,580 16,700 47 ,030 - 131,780 141,710 135,300 113 ,450 41 ,360 10 ,860 - SI 4,770 5,600 17/350 47,480 73,660 132,580 142,220 134,180 111,950 38,680 10,500 _ 88 4,750 5,620 17,450 47,840 75,460 133,380 148,900 133,060 110,300 35,900 10,230 - 23 4,730 5,540 17,850 48,290 78,220 133,860 143,750 131 ,940 108,500 33,800 9,990 _ 24 4,720 5,680 18,150 48,740 83,310 134,600 143,920 130,500 106,420 30,440 9,720 _ 85 4,700 5,700 18,610 49,190 86,430 136,300 143,580 129,220 104,800 27,680 0,420 - 86 4,700 5,720 19,050 49,640 88,850 138,100 143,070 127,780 102,640 84,880 9,150 _ 27 4,680 5,740 19,440 50,100 91,760 136,780 148,730 126,500 100,260 22,080 8,850 28 4,880 5,760 19.820 50,500 94,240 137,290 142,220 125,380 98,020 80,480 8,650 29 4,660 5,780 20,200 51 ,000 137,970 141 ,710 125,380 96,780 18,880 8,860 30 4,680 5,800 80,690 51,400 138,820 141,200 126,060 93,580 18,100 7,980 31 4,730 81,480 61,900 139,500 124,420 17,360 7,780 ^ 208 MERCED RIVER BASIN Contents, In acre-feet, of Lake Mod-lire at Exchequer, Calif., 1932-38 Continued 1934-36 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 4,170 18 ,880 39,480 111,650 133,700 151,400 248 ,500 255,250 282,110 224,860 148 ,340 2 4,510 19 ,430 40,040 111 ,950 132,900 152,480 247,520 257,250 281 ,030 222,330 146,130 3 4,960 19,880 40,600 112,550 132,100 154,820 246,560 259,250 279,680 219,800 143,920 4 5,150 20 ,320 41,450 114,050 131 ,940 159,680 246 ,800 260,500 278,600 217,040 141,710 5 5,350 20,700 49,730 116,300 132,100 162 ,740 248,250 261,000 277,300 214,320 139,500 6 5,600 21 ,060 53,100 119,300 131 ,620 164,570 250,750 260,500 276 ,000 211,680 137,120 7 5,800 21,420 55,000 122,340 136,270 170,080 253,000 260 ,000 274,700 209,040 134,820 8 6,020 21,780 57,500 126,180 139,500 211,240 254,250 259 ,500 273,140 206,180 132,580 9 6,220 21,900 62,840 128 ,740 141,030 223,020 255 ,000 258 ,500 271,320 203 ,570 130,340 10 6,380 22,200 67,460 131 ,460 141,710 229,460 255,250 262,250 269,500 201 ,050 128,260 11 6,650 22,500 70,180 133,540 141,880 232,680 254,500 269,240 267,940 198,530 126,020 12 6,700 22,680 72,220 134,980 142 ,390 232,450 253,750 276,000 265,860 195,800 123,780 IS 6,920 23,100 73,900 137,120 143,410 232,220 253,250 280,220 264,040 193,280 121 ,700 14 7,080 26,640 75,100 138,990 144,600 232,910 25-3,000 281,300 262,750 190,760 119,450 15 7,400 28 ,760 80,380 140,350 145,790 237,920 255,750 281 ,300 261,500 188,100 117,350 16 8,150 29,880 83 ,830 141,710 146,470 240,080 257,000 280,220 260,750 185 ,700 115,250 17 8,910 30,790 87,080 143,410 146 ,470 239 ,840 255,250 279,950 260,000 183,100 113,150 18 9,810 31,490 90,980 142,560 146,470 238 ,400 254,000 281 ,300 258,250 180,700 111 ,050 19 11,160 32,150 94,380 141,880 146 ,130 237,200 254,500 282,650 256,500 178 ,100 108 ,800 20 12,180 32,820 96,620 140,690 145,620 236,720 256,000 284,270 254,500 175,700 106,700 21 12,880 33,420 98 ,440 140,010 145,620 236,960 257,250 284,540 252,500 173,120 104,600 22 13,560 33,880 99,980 139,500 145,280 237,440 259,000 284,000 250 ,000 170,650 1.02,640 23 14,200 34,400 100,260 138 ,650 145,450 237,440 260,000 283,460 247,520 1.68,180 100,540 24 15,010 34,850 103,760 -, 146,130 238,640 260 ,500 282,920 245,120 L65,Y10 98,440 25 15,640 35,220 106,140 137,800 146,300 239,840 259,500 283,190 242,480 1.62,740 96,480 26 16,250 35,680 107,450 136,780 146,640 241,280 260 ,000 283,460 240,080 160,940 94,520 27 16,850 36,120 108,350 135,620 146,980 242,720 260,000 283,730 237,440 159,140 92,670 28 17 ,400 36,760 109,100 134,660 147,320 244,400 259,750 283,730 235 ,040 156,440 90,720 29 17,900 37 ,640 110,150 148,000 249,000 259,500 283,190 232,450 154,640 88,900 30 18,350 38,360 110,600 149,020 249,750 257,250 282,920 229,920 152,480 87,080 31 - 39 ,000 111,200 - 150,210 » 255,250 - 227,390 150,380 Day Oct. Nov. Dec. Jan. Feb. Her. Apr. May June July Aug. Sept. 1 85,130 63,940 69,340 74,620 116,150 246,560 245,360 241,760 263 ,OOO 282,110 225,550 143,410 2 83,440 64,050 69 ,460 76,060 130,980 246,080 244,880 241,280 263,260 281 ,570 223 ,020 141,030 3 81 ,620 64,270 69,580 76,420 134,660 245,600 245,120 244,160 253,520 281 ,030 220,260 138,480 4 80,020 64,380 69,700 77,020 136,780 245,360 248,500 247 ,280 264,560 279,950 217,730 136,270 5 78,460 64,600 69,820 77,500 138,310 245,600 246,800 249 ,750 265,600 278,870 214,980 134,180 6 76,900 64,710 69,940 77,860 139 ,670 246,080 246,320 249,750 266,900 277,300 212,340 131,940 7 75,340 64,820 69,940 78,220 140,860 246,560 246,800 247,520 269,240 276,000 209,480 129,860 8 73,660 64,930 70,060 78,580 141 ,880 246 ,800 247,040 246,320 271,060 275,480 206,840 127,620 9 72 ,100 66,040 70,300 81,100 142,900 247,040 248,000 246,560 272,620 274,180 203,990 125,380 10 70,660 65,150 70,420 83,960 143,750 247,520 248,600 247,520 274,700 272,880 201 ,260 123,140 11 89,100 65,260 70,540 88 ,380 151,230 247,760 249,000 248,750 278,340 271,320 198,530 121 ,100 12 67,570 65,370 70,780 90,980 170,650 248 ,000 249,250 249,000 282,650 269,760 196 ,010 119,000 13 66,250 65,590 71,020 92,280 189 ,710 248,250 249,500 250,250 285 ,080 267,940 193,280 116,900 14 64,820 65,700 71 ,140 93,970 213,220 247,760 250,000 251,250 285,350 266,120 190,550 114,850 15 63,500 65,700 71,380 95,640 223,710 247,520 249,500 252,000 284,540 264,300 187,900 112,700 16 63,720 65,810 71,500 98,300 237,680 247,280 249,250 252 ,250 284 ,540 262,500 185,100 110,600 17 63 ,720 66 ,030 71,620 100,260 245,120 247,280 249 ,250 252 ,000 284,810 260,500 182 ,300 108,650 18 62 ,840 66,470 71,860 101,520 248,250 247,280 249,250 251,750 285,080 268,500 179 ,500 106,700 19 62 ,950 67,020 71,980 102,500 248 ,500 247,280 247,760 250,500 285,080 256,250 176,700 104 ,740 20 63,060 67,680 72,100 103,340 248,250 247,280 247,760 247,760 285,080 254,250 173,900 102 ,920 21 63 r170 68,260 72,220 104,180 247,760 247 ,520 247,760 245,840 285,080 252,250 171,220 100,960 22 63,280 68,500 72,340 104,880 258,000 247,760 248,250 250,000 284,810 250,250 168,370 99 ,140 23 63,390 68,620 72,580 105,440 261,000 247 ,280 248,500 252,000 284,810 248,000 165,710 97,180 24 63,500 68,740 72 ,700 106,140 255,000 246,800 248,500 255,000 285,620 245,840 162,920 95,360 25 83,500 68,980 72,820 106,700 251 ,280 246,320 248,000 258,250 285,890 243,440 160,220 93,450 26 63,610 69,100 72 ,940 107,300 247,760 245,600 248,250 260,500 285,080 241,040 157,700 91,630 27 63,780 69,220 73,060 108,050 246,800 244,880 248,750 261 ,750 284,540 238 ,400 155,180 89,810 28 63,720 69,340 73,300 108,600 246,800 244,160 248,000 263 ,000 284,000 236,000 152,660 87,990 29 63,830 69,460 73,660 109,100 247 ,040 243,680 246,560 263,000 283,190 233,370 150,210 86,170 30 63,830 69,480 74,140 109,700 243,680 244,160 263,000 282,380 230,840 148,000 84,350 31 63,940 - 74,380 110,150 - 244,880 - 263,000 - 228 ,080 145,960 - MERCED RIVER BASIN Contents, In aore-feet, of Lake MoClure at Exchequer, Calif,, 1932-38 Continued 1936-5V Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 82,530 60 ,640 63,170 79,900 96,620 238,400 231 ,990 249,250 262 ,000 281 ,300 212,340 125,700 2 80 ,740 60,860 63,280 80,500 96/360 237 ,920 232 ,680 250,250 261 ,500 280,220 209,260 123,140 3 79,060 60 ,970 63,280 81,100 95,360 237,440 832,910 250 ,000 261 ,500 279,680 206,180 120 ,600 4 77,380 61 ,080 63,390 81 ,750 95,080 236,960 832,680 251 ,000 263,260 278,600 803,150 118,250 5 75,700 61 ,190 63 ,390 82,530 112,250 236,720 231 ,990 252,250 266,380 277,560 200,210 115,YOO 6 74,020 61 ,300 63,500 83,180 159 ,860 236,480 232 ,220 254,260 268,460 276,260 197,270 113,300 7 72 ,340 61,410 63,500 83,830 174,900 236,480 231,Y60 255,250 269,760 2Y4,700 194,330 111,050 8 70,660 61,520 63,610 84,350 178,700 236 ,480 231 ,300 255,250 2YO,800 372 ,880 191 ,390 108,500 9 68,860 61,630 63,610 84,740 179,900 236 ,480 231,070 256,000 271 ,840 271,060 188,500 106,280 10 67,130 61 ,630 63,720 85,130 180 ,300 236,480 231,530 256,000 272,620 268,980 185,500 104,040 11 65,480 61,740 63,830 85,780 180,500 236,480 231,990 255,250 273 ,140 266,900 182 ,700 101 ,940 12 63,830 61 ,850 63,830 86,300 181,100 235,700 232,680 257,750 273,660 264,820 179,700 99,YOO 13 62,400 61 ,960 63 ,940 86,560 191,600 233,140 233,600 262,500 274,960 262 ,750 176,900 97,600 14 60,860 62,070 63,940 87 ,080 227,620 231 ,760 235,620 268,980 278,000 260,750 173,900 95 ,600 15 59 ,320 62 ,180 64,380 87,600 237,440 231 ,530 238,640 274,180 877,560 258,500 171,030 93,450 16 59,210 62,180 68,260 88,250 241 ,520 231,300 242,000 277,300 279,680 256,250 167,990 91,500 17 59,210 62 ,290 70,180 88,770 243,680 231,300 844,640 279,410 281 ,570 253,750 165,330 85,650 18 59,210 62,400 70,900 89 ,160 245 ,120 232 ,450 247,040 279,950 281 ,840 251,000 162,380 87,800 19 59,320 62,510 71,500 89,680 245,840 233,370 248 ,000 277,040 281 ,840 248 ,600 159,680 85,650 20 59,430 62,510 71,860 90,200 245,840 233,600 245,600 274,440 282,380 245 ,840 156,980 83,YOO 21 59 ,540 62,620 72,220 90,720 245,840 233,840 244,160 2Y3,400 282,110 242,960 154 ,100 81 ,750 22 59,650 62 ,730 72,580 90,980 245,600 235,280 242,720 273 ,140 282,110 240 ,080 151 ,400 79,900 23 59,760 62,730 72,820 91 ,500 045,360 233 ,600 245,600 272 ,360 282 ,380 237 ,200 148,680 Y8,220 24 69,870 62,840 73,060 91 ,890 243,920 235,040 246,800 270 ,800 282,650 234 ,560 146,130 76 ,420 25 59,870 62 ,840 73,420 92,280 243,200 234,800 248,000 270,640 282,920 238 ,450 143,750 74,740 26 59,980 62,950 73,660 92 ,670 241,040 232,910 249,250 267,480 282,920 229,920 141,200 73,180 27 60,090 62,950 74,980 93,060 239,120 231 ,OYO 249 ,500 265,340 282,650 227 ,380 138,480 71,600 28 60,200 63,060 76 ,180 93,840 238,640 230,380 248 ,600 266,860 282,380 224,400 135,940 69,820 29 60,200 63,060 76 ,780 95,840 231,300 248,250 267,940 282,380 221 ,410 133,380 68 ,260 30 60,310 63,170 78,580 96,900 - 231 ,530 248 ,250 288 ,200 281,840 218,420 130,820 66,690 31 60 ,420 - 79,420 97,600 - 231,990 - 265,080 - 215,200 128,100 - Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 65,150 48,290 52,000 167,800 179,600 236,240 227,620 225,550 288,860 287 ,240 277,300 210,680 2 63,610 48,380 52 ,100 166,470 185,700 265 ,080 227,390 224,630 288,860 287 ,240 275,740 208,600 3 62 ,070 48,470 52,200 165,520 202,310 277,560 227,620 226 ,470 288,860 287,240 274,440 206,400 4 60,530 48,470 52,300 164,380 211 ,020 281 ,840 228,540 224,170 289 ,400 288,430 272,880 204,200 5 58,990 48,560 52,500 162,920 214,980 280 ,490 229 ,920 223,710 288 ,590 285,350 270,800 202,100 6 57 ,500 48,560 52,600 161,660 217,040 276,520 230,380 223,020 288 ,690 285,080 268,980 200,000 7 56 ,200 48,650 52 ,700 160 ,220 218,190 271 ,320 228,770 222,330 288,590 285,080 266,900 197,900 8 55,000 48,650 52,800 158,780 218,880 266,120 227,860 221,870 288,320 285,350 266,080 196,010 9 53,600 48,740 53 ,000 157,340 223,020 260 ,000 228 ,540 222,560 288,320 285,080 263 ,260 193,910 10 52,300 48,740 62 ,070 155,720 235,280 253,000 228 ,640 224,170 287 ,610 284,810 261 ,500 191,810 11 51,100 48,920 129,380 154,280 269,760 246,080 228,310 227,620 286 ,700 284,270 259,250 189,710 12 50 ,100 49,010 155,000 152,840 268,460 255 ,000 228,310 231 ,760 285,350 283,460 257 ,000 187,700 13 49,190 49,100 162,380 151 ,230 264,300 277,660 228,080 237,920 283,730 283,190 254,750 185,700 14 48 ,290 49,190 166,660 149 ,870 266,900 281 ,840 226 ,930 250,000 283 ,190 282,920 252 ,260 183 ,700 15 47,390 49,370 169,890 166,090 263,780 281,840 225,780 260,000 284,270 282,920 250 ,000 181,700 16 47,390 49,460 172,550 168,660 258,500 280,490 225,090 270,640 285,620 282,920 247,520 179,700 17 47,390 49 ,640 174,900 169,700 252,750 279 ,140 226,240 277,040 285,080 282 ,920 245,600 177,700 18 47,480 49,910 176,900 170,650 247 ,040 275,740 227,850 281 ,030 284,270 282,920 243,200 175,700 19 47,670 50,100 178 ,700 170,650 242 ,720 271 ,060 230,150 282,380 283,190 282,650 241,040 173,900 20 47,630 50,300 180 ,300 170,460 237,200 268 ,460 230,840 281 ,570 281 ,03O 282 ,380 238,640 171,980 21 47 ,"750 50,500 181 ,500 169,890 233,370 264,820 231 ,990 279,950 280,220 282,110 238,240 170,080 22 47 ,840 50,600 180,YOO 169,320 232 ,910 259,750 233,600 279 ,140 283,190 281 ,840 233,840 188,180 23 47 ,930 50,800 179 ,700 168,560 233,140 254,000 235,280 280 ,220 286,970 281,300 231,630 168,090 24 47 ,930 51,000 178,YOO 167 ,610 233,140 251 ,000 236 ,240 282,380 288,320 280,760 889,230 164,380 25 48 ,020 51 ,200 177,600 166,470 233,140 246,320 235,760 285,080 288,590 279 ,950 226 ,930 162,580 26 48,110 51 ,300 176 ,100 165,520 232 ,910 240,800 232,910 287,240 2B8,690 279,680 224,830 160,940 27 48,110 51,600 174,700 164,380 232,680 234,320 229,460 287,780 288,690 281 ,300 222,330 159,1*0 28 48,200 51,600 173,500 163,460 232,910 231 ,300 227,850 287,780 287,780 281,300 219,800 157,880 29 48 ,200 51,700 171,980 162,740 _ 231,070 227,850 287,340 287,610 280,760 217,270 157,520 30 48,290 51,900 170,650 164,000 - 229,920 227 ,160 287,840 286,970 279,680 214 ,760 156,800 31 48,290 - 169,130 167,800 - 228 ,540 - 288,050 - 278,800 212,78~0 " 210 MERCED RIVER BASIN Merced River at Exchequer, Calif. Location.- Water-stage recorder, lat. 37°35', long. 120°17', about on line between sees. 14 and 23, T. 43., R. 15 E., at Exchequer, half a mile downstream from Lake McClure, 0.7 mile downstream from Cotton Creek, and 5 miles northeast of Merced Falls. Alti tude, about 400 feet. Drainage area.- 1,035 square miles. Records available.- October 1922 to September 1938. November 1915 to October 1922 at site 1 mile upstream. Ave ge discharge.- 22 years (1916-38), 1,188 second-feet; affected by storage in Lake McClure since Apr. 20, 1926. Extremes.- Maximum discharge during year, 13,200 second-feet Feb. 11 (gage height, 12.83 feet); minimum, 9 second-feet parts of Dec. 16 and 17. 1915-38: Maximum discharge observed, about 22,000 second-feet (unregulated) Jan. 17, 1916 (gage height, 20.0 feet, former site and datum), from rating curve extended above 9,000 second-feet; minimum, 5 second-feet (regulated) Jan. 5, 1935. Remarks.- Records excellent. No large diversions. See record for Lake McClure, which stores water above station. Results of ten discharge measurements furnished by Merced Irrigation District. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Doe. Jan. Feb. Har. Apr. *»y June July Aug. Sept. 1 732 38 35 1,190 24 3,430 2,620 4,360 10,500 3,920 1,660 1,340 2 732 38 35 1,190 110 5,180 2,170 4,180 12,000 4,140 1,660 1,340 3 732 38 35 1,180 893 5,820 2,170 2,470 11,300 4,140 1,660 1,300 4 732 39 35 1,180 1,260 5,820 2,260 4,360 11,600 3,700 1,660 1,300 6 705 37 35 1,180 1,260 5,820 3,810 3,450 11,100 3,280 1,660 1,300 6 680 36 35 1,190 1,260 5,820 2,800 3,810 10,200 3,080 1,660 1,300 1 670 36 35 1,190 1,260 5,820 3,690 4,260 10,200 3,080 1,660 1,200 8 645 36 35 1,180 1,260 5,820 2,9SO 4,260 9,830 3,080 1,660 1,200 9 635 36 35 1,180 1,260 5,820 2,620 4,250 10,200 2,980 1,660 1,200 10 635 36 38 1,170 1,280 5,820 2,880 4,380 9,510 2,790 1,660 1,160 11 569 36 29 1,170 7,320 5,820 3,080 4,580 8,600 2,610 1,620 1,160 12 472 36 31 1,160 9,670 5,430 3,OSO 5,300 7,580 2,340 1,620 1,160 13 468 36 30 1,160 6,470 5,820 3,080 5,820 6,470 2,090 1,620 1,160 14 468 56 29 1,160 7,020 5,950 3,080 5,830 5,950 1,970 1,580 1,160 16 468 36 28 1,200 6,080 5,820 3,080 5,820 6,210 1,970 1,550 1,130 16 64 36 17 1,190 5,960 5,950 2,790 6,820 7,020 1,970 1,550 1,100 17 59 36 14 1,190 5,300 5,960 2,610 6,340 7,160 2,010 1,520 1,100 18 28 36 26 1,190 4,940 5,820 3,280 7,440 6,740 2,010 1,480 1,100 19 27 36 27 1,190 4,940 5,820 4,820 7,720 8,080 1,930 1,480 1,100 20 26 36 27 1,190 4,940 5,820 5,560 7,160 5,430 1,810 1,520 1,100 21 26 36 49 1,190 3,700 5,820 5,560 6,340 4,250 1,770 1,480 1,100 SS 26 35 1,170 1,190 2,060 5,820 5,560 5,820 3,080 1,770 1,480 1,100 23 23 35 1,220 1,190 1,730 5,820 5,560 6,340 3,280 1,770 1,480 1,100 24 27 35 1,210 1,200 1,730 6,820 5,820 7,020 5,430 1,770 1,480 999 25 27 35 1,220 1,200 1,730 5,820 5,820 8,150 6,210 1,770 1,480 999 26 27 35 1,210 1,190 1,730 5,820 6,820 8,450 6,210 1,770 1,520 999 27 27 35 1,210 1,190 1,620 5,960 5,950 9,990 6,080 1,690 1,520 969 28 27 35 1,200 1,190 1,650 4,250 4,940 10,300 5,820 1,690 1,520 911 29 27 35 1,200 1,190 .. 2,520 4,360 9,200 4,700 1,690 1,520 911 30 30 35 1,200 53 _ 2,790 4,360 8,760 4,030 1,660 1,520 883 31 38 - 1,200 26 - 2,790 9,610 1,660 1,340 - Second- Run-off in Maximum Minimum Mean Month foot-days acre-feat 9,856 rr«P{&& 26 318 19,550 1,081 39 35 36.0 2,140 12,698 1,220 14 410 26,190 Calendar year 1937...... 625,320 7,640 14 1,713 1,240,000 34,439 1,200 28 1,111 68,310 88 337 9,670 24 3,155 176,200 March...... 166,640 5,960 2 j-520 5,376 330,500 April...... 5,950 2,170 3^863 229,900 115,900 ZWQ rrnfi Bay...... 191,410 10,300 2,470 6,175 O fVf ( Uw 222,770 12,000 3,080 7,428 441,900 73,910 4,140 1^660 2,384 146,600 toe 48,480 1,660 1,340 1,664 96,160 Sej 33,881 1,340 883 1,129 67»200 Water year 1937-28...... 999,401 12,000 14 2,738 1,982,000 MERCED RIVER BASIN 211 Merced River near Livingston, Calif. Location.- Water-stage recorder, lat. 37°23'29", long. 120°47'10", in SEi sec. 20, T. 6 S., R. 11 E., 3i miles west of Livingston. Altitude, about 82 feet. Drainage area.- 1,245 square miles. Records available.- March 1922 to September 1924, October 1925 to September 1938. Average discharge.- 13 years (19S5-38), 674 second-feet. Extremes.- Maximum discharge during year, 11,100 second-feet Feb. 12 (gage height, 19.44 feet); minimum, 108 second-feet during parts of Nov. 13, 14. 1922-24; 1925-38: Maximum discharge, that of Feb. 12, 1938; minimum discharge ob served, 18 second-feet Aug. 30, 1924. Remarks.- Records good except those for period missing or doubtful gage heights, Dec. 23, 24, Mar. 18 to May 10, which were computed from corrected gage-height graph and are fair. Practically entire flow is diverted above station during irrigation season; re turn water enters above station. Flow regulated by storage at Lake McClure. Gage- height record and results of ten discharge measurements furnished by Merced Irrigation District. Discharge, In second-feet, water year October 1937to September 1938 Day Oct. lor. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 236 114 164 1,260 2,020 2,040 3,160 3,940 7,850 2,780 300 326 222 117 137 1,260 1,720 4,500 2,7SO 3,940 8,460 2,830 276 289 251 117 127 1,260 846 8,060 2,480 3,280 9,230 3,040 268 268 4 253 112 125 1,260 1,760 7,550 2,430 1,820 9,340 2,990 240 270 259 112 124 1,260 2,140 6,810 2,530 3,040 9,340 2,630 250 280 6 2*22234 111 122 1,260 1,760 6,460 3,400 2,990 9,230 1,950 250 287 111 120 1,260 1,610 6,370 2,990 3,040 8,460 1,720 291 278 234 111 118 1,260 1,540 6,890 3,640 3,460 8,360 1,640 315 244 239 112 119 1,260 1,610 6,290 3,340 3,580 8,150 1,640 298 252 265 112 134 1,260 2,420 6,290 2,780 3,580 8,260 1,560 276 264 11 279 114 153 1,260 3,830 6,290 2,680 3,580 7,950 1,400 287 262 249 114 232 1,260 8,950 6,370 2,730 3,680 7,350 1,180 272 268 261 112 364 1,260 9,570 6,810 2,680 4,360 6,450 950 289 264 14 249 112 245 1,260 7r650 7,260 2,630 4,690 5,370 730 326 256 241 116 195 1,440 8,150 6,720 2,730 4,690 4,820 620 320 252 16 265 116 173 2,130 7,080 6,460 2,730 4,690 5,020 575 309 260 283 119 209 1,500 6,450 6,720 2,430 4,620 5,650 575 293 272 239 124 241 1,470 5,890 6,630 2,330 5,090 5,730 597 274 862 200 122 195 1,400 5,510 6,290 2,580 5,890 5,370 542 268 264 163 12S 175 1,470 5,440 6,290 3,580 6,290 4,880 470 268 240 21 156 120 161 1,500 5,370 6,290 4,500 5,810 4,240 390 298 244 151 119 150 1,400 4,060 6,290 4,690 5,090 3,400 353 322 254 142 120 650 1,360 2,530 6,290 4,690 4,560 2,630 335 326 278 24 139 119 1,000 1,330 2,130 6,290 4,690 4,880 2,380 326 339 280 130 119 1,180 1,330 2,000 6,370 5,090 6,510 3,880 326 350 282 26 127 122 1,190 1,330 1,950 6,290 5,440 6,210 4,760 335 348 298 125 119 1,190 1,330 1,900 6,210 5,440 6,810 4,820 353 350 300 122 117 1,220 1,330 1,820 6,210 5,440 7,850 4,690 335 353 326 120 119 1,220 1,400 « 4,680 4,560 8,460 4,500 326 363 342 114 144 1,220 1,640 - 3,220 4,000 7,850 3,280 308 331 336 114 " 1,860 762 - 3,220 - 7,450 300 344 Second- Run-off in Month foot-days Maximum Minimal Mean acre-feet 13,894 1,260 119 448 27,560 425,753 6,480 111 1,166 844,400 41,662 Iba...... 1 fiPO 183,630 9,340 2,380 6,121 364,200 34,006 3,040 300 1,097 67,450 01 "VfA. O>O Z/1Q 8,281 342 240 276 16,430 Water year 1937-3 851,885 9,670 111 2,334 1,690/300 Peak discharge.- Feb. 12 (11 p.m.) 11,100 see.-ft.j June 4 (7 a.m.) 9,690 seo.-ft.t June 6 (4 a.m.) 9,670 sec.-ft. 212 MERCED RIVER BASIN Tenaya Creek near Yosemlte, Calif. Location.- Water-stage recorder, lat. 37044'33", long. 119°33'25", In Yosemlte National Park, at bridge, 0.7 mile upstream from confluence with Merced River, and 1.9 miles east of Yosemite Lodge, Marlposa County. Altitude, about 4,000 feet. Drainage area.- 47 square miles. Records available.- July 1904 to 1909, January 1912 to September 1938. Average discharge.- 25 years (1913-38), 104 second-feet. Extremes.- Maximum discharge during water year 1936-37, 1,570 second-feet May 14 (gage height, 5.80 feet), from rating curve extended above 1,000 second-feet; minimum, 0.9 second-foot Dec. 1-13 and part of Dec. 14. Maximum discharge during water-year 1937-38, 5,550 second-feet Dec. 11 (gage height, 10.0 feet), from rating curve extended above 2,000 second-feet on basis of velocity-area studies at measuring section and at a temporary staff-gage station half a mile upstreamj minimum, 1.0 second-foot Nov. 13, 19, 20. 1904-9, 1912-38: Maximum discharge, that of Dec. 11, 1937; minimum? 0.6 second- foot Dec. 18-22, 1929. Remarks.- Records good except those for period of missing gage heights, Sept. 19-25, 1938, which were interpolated and are fair. No diversion. Revised records for water year 1936-37 supersede those published in Water-Supply Paper 831. Discharge, la seoond-feet, 1936-38 1936-37 D«y Oct. Nov. Dec. Jan. Pet). Mar. Apr. ««y June July Aug. Sept. 1 2.1 1.5 0 9 a 8.5 36 87 289 610 98 11 4.4 2 2,1 1,5 9 6 9,5 36 97 399 650 86 11 4,2 S 2.1 1.4 9 6 9 39 85 501 690 78 10 4,2 4 2.1 1.4 9 6.5 11 45 73 610 752 70 9 4.2 5 1.9 1.4 9 7.5 22 51 72 670 690 64 8 4.2 6 1,9 1.4 9 8 66 57 77 670 610 59 8 4.0 7 1.9 1.3 9 8. 80 64 71 630 535 52 7.5 4.0 8 1.9 1.3 9 7,5 57 72 70 630 469 47 7 S.9 9 1.8 1.3 9 7.5 46 74 70 650 433 42 6.5 S.9 10 1.8 1.3 9 7.5 39 TO 85 590 392 38 6.5 3.7 11 1.7 1.3 9 7.5 36 70 90 630 340 36 6 S.6 12 l.Y 1.3 9 7.5 36 72 97 842 322 37 6 S.4 13 1.7 1.2 9 7.5 51 71 128 1,020 300 40 6,5 S.4 14 1.7 1.2 1 0 7.5 110 65 178 1,160 287 33 5.5 3.2 15 1*7 1,2 32 7.5 83 61 241 1,120 294 30 5.5 S.I 16 1.7 1.2 89 8 71 60 224 1,020 322 26 4.9 S.I 17 1.7 1.1 24 7.5 60 65 199 940 287 25 4.7 2.9 18 1.7 1.1 16 8 53 64 241 796 266 23 4.7 2.8 19 1.7 1.1 11 8 49 59 271 630 271 20 4.6 2.8 20 1.7 1.1 9 7,5 41 61 340 690 276 18 4.6 2.6 21 1.7 1.1 8 7 39 57 440 752 279 17 4,6 2,6 22 1.6 1.1 7 7.5 39 55 464 774 274 16 4.6 2.4 25 1.6 1.0 6 7.5 39 51 437 752 244 19 4,6 2.4 24 1.6 1.0 6 7.5 41 SI 396 731 212 25 4.6 2.2 25 1.6 1.0 6 7.5 42 49 392 670 188 20 4,6 2,1 S6 1,6 1,0 6 7.5 39 47 S69 670 162 19 .6 2,0 27 1.6 1.0 7.5 7.5 36 48 310 752 144 17 .4 2.0 28 1.6 1,0 6 8 36 47 229 890 140 15 ,4 1.9 29 1.6 1*0 5,5 8 47 188 890 129 14 ,6 1.8 SO 1.5 1,0 6 8 53 197 752 113 13 ,4 1.6 SI 1.5 " 6,5 7,5 - 66 - 590 12 .4 MERCED RIVER BASIN 213 Discharge, In second feet, of Tenaya Creek near Yosemlte, Calif,, 1936 38 -Continued 19S7-38 Day Oct. Hov. Dec. Jan. Feb. Har. Apr. May June July Aug. Sept. 1 1.6 1.2 1.1 37 37 76 68 240 1,140 318 44 6.5 2 1.6 1.2 1.1 40 37 125 TV 224 1,140 315 38 5.5 3 1.6 1.2 1.1 38 42 107 92 192 1,140 278 35 5 4 1.6 1.2 1.1 37 39 95 110 200 1,100 242 32 5.5 . 5 1,6 1.2 1.1 35 3V 83 110 208 945 223 29 5 6 1.5 1.1 1.2 34 37 YV 107 224 1,000 217 27 5 7 1.5 1.2 1.2 33 38 70 106 260 972 214 26 4.6 8 1.5 1.2 1.2 32 39 66 110 286 1,000 205 17 4.4 9 1.4 1.2 1.4 30 43 62 132 381 918 190 12 4.4 10 1.4 1.1 692 30 48 60 140 505 815 174 15 4,4 11 1.4 1.2 3,430 29 53 64 152 616 695 156 15 4.2 12 1,3 1.1 1,240 28 47 116 162 735 570 142 14 4.2 13 1.3 1.0 416 28 50 121 146 930 485 129 12 4.0 14 1.3 1.1 243 28 54 101 126 1,180 552 126 11 4.0 15 1.3 1.1 17V 40 52 95 117 1,260 650 123 10 4,0 16 1.3 1.1 136 41 48 98 138 1,030 695 118 9.5 4.0 17 1.3 1.1 117 48 45 95 202 930 630 114 8.5 4.0 18 1.8 1,1 98 48 44 88 363 842 535 107 8.5 4,0 19 1.4 1.0 83 46 44 88 480 686 455 101 B.5 4,0 20 1.4 1,0 69 42 43 99 509 547 342 96 8 3.8 21 1.3 1.1 65 42 44 93 543 420 374 86 8 3.6 22 1.3 1.1 60 43 46 96 543 476 422 BO 7 3.4 23 1.3 1.1 56 40 48 121 543 639 470 93 6.5 3.2 24 1.2 1.2 53 3V 54 150 526 760 518 80 6 3.0 25 1.2 1.2 49 3V 54 121 420 842 518 68 6 2.8 26 1.2 1.2 48 38 53 98 330 900 500 94 5.5 2.6 27 1.2 1.1 43 40 53 86 310 1,060 470 89 5 3.0 28 1.2 1.1 41 39 55 85 307 930 407 69 5 7 29 1.2 1.1 40 38 78 336 816 340 62 4.4 10 30 1.2 1.1 40 37 VO 280 870 318 54 4.2 8 31 1.2 38 37 68 962 48 6.5 Second- Month Maximum Minimum Mean Run-off In foot-days acre-feet Oc1 ooer 19, 54.1 2.1 l.E 1.V6 107 Hoi 35.8 1.5 l.C 1.19 71 Dec 264.2 89 .£ 8.52 524 C alendar year 19' 6...... 47,136.4 851 ,E 129 93 ,490 Jar niary 192 ijr 230.5 8 6 7.44 457 Pel 1,249.0 110 8.E 44.6 2,480 Mai 1,761 V4 35 56.8 3,490 Api 6,208 454 70 207 12 ,310 Maj 22,610 1,160 289 729 44,850 Jur 10,681 75S 113 356 21,190 Jul 1,109 98 12 35,8 2,200 Auf 186.3 11 4.4 6.01 370 Sej 92.5 4.4 i.e 3.08 183 V ater yea r 1936-27 ...... 44,481.4 1,160 ,s 122 88,230 Oct ooer 192 Tf 42.3 1.6 l.£ 1.36 84 HOT 33.6 1.2 l.C) 1,13 67 Dec ember 7,244.5 3,430 i.:L 234 14,370 C alendar year 19! 7 ...... 51,448.0 3,430 l.C) 141 102,100 Jar tuary 19! g 1,152 48 28 37.2 2,280 Pet 1,284 55 37 45.9 2,550 Mai 2,851 150 60 92.0 5,650 Api 7,585 543 68 253 15,040 Maj 20,150 1,260 192 650 39,970 Jur 20,116 1,140 318 671 39,900 Jul 4,411 sis 48 142 8,750 Aug 444.1 44 4.£ 14.3 881 3ej 137.1 10 2,f1 4.57 272 V 65,450.9 3,430 l.t) 179 129,800 Peak discharge.- Dee. 11, 1937 (4 p.m.) 5,560 sec.-ft.} June 1, 193S (8s45 p.m.) 1,710 sec.-ft.j June 3, 1938 (8i30 p.m.) 1,660 see.-ft. 214 ORESTIMBA CREEK BASIN Orestlmba Creek near Newman, Calif. Location.- Water-stage recorder, lat. 37°19'09", long. 121°07'14", In NWi sec. 20, T. 7 S., R. 8 E., 3 miles downstream from Oso Creek, at highway bridge 5 miles west of Newman. Altitude, about 190 feet. Drainage area.- 129 square miles. Records available.- January 1932 to September 1938. Extremes.- Maximum discharge during year, 2,880 second-feet Feb. 11 (gage height, 4.80 feet), from rating curve extended above 1,000 second-feet on basis of 1932 slope-area computations; no flow for several months. 1932-38: Maximum discharge, 3,440 second-feet Feb. 8, 1932 (gage height, 5.15 feet), from rating curve extended above 500 second-feet on basis of slope-area compu tations; no flow for several months each year. Remarks.- Records good except those for period of missing gage heights, Dec. 24 to Jan. 24,""which were computed on basis of weather records and partial recorder graph and are fair. No large diversion. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0 485 282 50 21 1.6 8 0 0 320 1,420 48 17 1.2 S 0 0 1,360 650 46 14 .8 4 0 0 73S 362 45 12 .8 S 0 0 356 241 58 12 .7 6 0 0 213 191 44 10 .6 7 0 0 135 167 40 10 .5 8 0 0 94 18S 38 9.5 .4 9 0 0 427 148 36 9 .4 10 0 0 1,100 129 35 8 ,4 11 1,070 0 1,780 132 32 7.5 .3 18 197 0 762 712 32 7 .3 13 51 0 476 873 35 6 .2 14 19 0 1,470 467 29 5.5 .2 IS 7.5 1 485 286 27 5 .2 16 2.5 1 286 229 26 5 .1 17 .7 2 194 191 25 5 0 18 0 2 254 157 23 4.3 10 0 4 272 135 22 3.6 0 80 0 3 184 129 22 3,6 0 21 0 2 151 112 19 3.6 0 22 0 2 126 99 18 3.3 0 0 1 104 89 17 2.9 0 0 .4 89 96 17 2.4 0 0 .1 76 80 18 2.1 0 86 0 0 69 73 17 2.1 0 87 0 0 64 67 16 2.0 0 o .3 65 62 16 2.0 0 0 2.5 _ 59 16 2.3 0 0 5.5 56 21 2.1 0 0 54 - 53 1.8 Second- Run-off In Month foot-days Maximum Minimus Mean acre-feet 1,347.7 1,070 0 43.5 2,670 8,353.2 1,070 0 22.9 16,560 May...... 8.6 1.5 0 .29 17 0 0 0 0 0 0 0 0 0 0 Water year 1937-3 22,596.7 1,780 0 61.9 44,820 Peak discharge.- Feb. 3 (4 a.m.) 2,460 sec.-ft.} Feb. 11 (4 a.m.) 2, see,-ft.; Feb. 14 (4s30 a.m.) 2,670 see.-ft. TUOLUMNE RIVER BASIN 215 Hetch Hetchy Reservoir at Hetch Hetchy, Calif. Location.- Water-stage recorder, lat. 37°57', long. 119°47', in sec. 16, T. IN., R. 20 E., at 0'Shaughnessy Dam on Tuolumne River at Hetch Hetchy in Yosemite National Park. Prior to Apr. 18 staff gage at same site and datum. Records available.- May 1923 to September 1939 (gage heights only, 1923-30). Remarks.- This reservoir is main storage unit of Hetch Hetchy water-supply system for San Francisco. Crest of dam has been raised from 3,726.5 feet to 3,812.0 feet above mean sea level. Construction work completed during year. Released water flows down natural channel of Tuolumne River for 15 miles to Early intake, where it is diverted through Hetch Hetchy aqueduct to Moccasin Creek power plant. At Moccasin Creek di version dam water again enters Hetch Hetchy aqueduct and is discharged into Crystal Springs Reservoir, which supplies city of San Francisco. Surplus water is wasted into Don Pedro Reservoir at Red Mountain Bar. Table shows total contents, all of which are available for release. Staff gage read once daily. Contents, in acre-feet, water year October 1937 to September 1938 D«y Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 141,880 109,720 78,600 132,970 109,840 107,640 119 ,080 185 ,080 349 ,770 348,600 343,160 323,010 2 140,800 108,670 77,600 132,190 109,370 108,670 119,080 186,250 350,550 348 ,600 343,160 321,870 5 139,720 107,640 76,600 131^420 108,900 111,830 119,430 187,770 352,300 347,820 343,160 320,740 4 138,910 106,520 75,640 130,780 108,780 112,650 120,160 186,980 352,500 347,040 342,770 319,790 5 137,830 105,400 74,680 130,140 108,550 113,110 121 ,820 186,830 351,520 346,840 342,580 318,660 6 136,750 104,280 73,720 129,370 108,090 113,230 122 ,460 187,770 351 ,720 347,040 342,580 317,330 7 135 ,670 103,050 78,760 128,600 107 ,860 113,830 122,840 187,160 351 ,720 347,430 342,380 316,200 8 134,690 101,930 71,800 127,840 107,530 113,230 123,480 187 ,160 351,920 347,620 342,380 315,070 9 133,610 100,700 80,840 126,940 107,080 113,230 124,510 190,050 351 ,350 347,040 342,190 313,940 10 132,440 99,460 71,890 186,040 107,530 113,110 125,530 194,780 350,740 346,650 341 ,800 312,630 11 131,890 98,230 79,500 124,890 108,320 118,760 126,940 200,790 349 ,770 346,070 341,220 311,130 12 130,270 97,000 130,520 123,610 108,780 113,350 128,350 208,240 348 ,400 345,490 340,640 310,010 IS 129,120 95,740 136,750 122,330 108,550 116,270 129,630 218,920 347,430 345,290 340 ,060 308,700 14 128,090 94,580 139 ,320 121,180 108,650 117,330 130,270 232,830 348 ,600 345,490 339,290 307,390 15 127,200 93,540 140,800 122,590 108,550 118,260 131,040 248,470 350,160 345,870 338 ,710 306,080 ie 126 ,040 92,480 141,480 121,310 108,320 118 ,730 131,800 259 ,760 350,550 346,070 337,940 304,780 17 125,020 91 ,440 141,880 120,030 108 ,090 119,080 133,240 267,840 349,770 346,260 337,160 303,290 18 124,000 90,490 142,020 119,780 107,860 118,960 139 ,860 274,950 346,800 345,870 336 ,200 301,990 19 122,970 89,440 141,880 119,430 107,750 119,080 144,980 279 ,270 347,820 345,490 335,430 300,690 20 122,080 88,390 141 ,740 118,850 107,300 119 ,080 150,260 282,170 346,650 345,290 334,470 299,400 21 121 ,050 87 ,440 141,340 118,140 107,190 119,430 156,000 283 ,070 346,650 345,100 333 ,610 298,100 22 119,900 86,710 140,800 117,560 106,970 119,670 161 ,240 284,710 347,430 345,100 332,550 296,810 23 118,960 86,000 140,260 116,860 106,970 119,550 165,970 288,910 348,990 345,100 331,790 295,520 24 117,910 85,200 139,720 116,040 106,970 119,670 170,710 296,280 350,360 344,710 330,830 294,230 25 116,860 84,200 139,040 115,880 107,080 119,670 173,820 304,410 350,740 344,520 329,870 292,940 26 115 ,920 83,300 138,100 114,400 107,190 119,670 175,760 312,250 350,740 344,520 328,730 291,660 27 114,900 82,400 137,160 113,580 107,300 119,550 177,740 323,580 350,360 344,710 327,580 290,740 28 113,930 81 ,500 136,210 112,760 107,080 119,430 180,170 332,750 349 ,180 344,130 326,630 289,830 29 112,880 80 ,600 135 ,400 111 ,940 _ 119,550 182,600 340,250 348,020 343 ,930 325,670 288,730 SO 111,830 79,600 134,590 111,120 _ 119,430 183,820 345,870 346,020 343,740 324,720 287,810 31 110,770 - 133 ,780 110,420 - 119,320 - 348,210 - 343,350 323,960 216 TUOLUMNB RIVER BASIN Tuolumne River near Hetch Hetchy, Calif. Location.- Water-stage recorder, lat. 37°56', long. 119°48', In SEi sec. 17, T. 1 N., R. 20 E., In Yosemite National Park, three-quarters of a mile downstream from O'Shaughnessy Dam at Hetch Hetchy and 2.5 miles downstream from mouth of Falls Creek. Altitude, about 3,450 feet. Drainage area.- 462 square miles. Records available.- December 1914 to September 1938. Average discharge.- 23 years (1915-38), 939 second-feet. Extremes.- Maximum discharge during year, 10.800 second-feet June 4 (gage height, 13.25 feet^l; minimum, 56 second-feet (regulated; Aug. 25. 1914-38: Maximum discharge, 12,000 second-feet (reservoir full and spilling) June 16, 1929 (gage height, 13.58 feet); minimum, 1.2 second-feet Jan. 18, 1931. Remarks.- Records excellent. No diversions. See records for Hetch Hetchy Reservoir, which stores water above station. Rating table, water year 1937-38 (gage height, in feet, and discharge, in second-feet) 5,0 480 7.5 1,330 10.0 3,570 12.5 8,890 5.5 590 8.0 1,640 10.5 4,350 13.0 10,300 6.0 730 8.5 2,010 11,0 5,290 13,2 10,800 6,5 895 9,0 2,440 11.5 6 ,350 7.0 1,090 9,5 2,930 12.0 7,570 Discharge, In second-feet, water year October 1937 to Septenber 1938 Day Oet. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 520 552 565 6S5 790 615 565 1,130 8,610 5,290 1,280 730 2 540 552 590 685 790 700 540 1,020 9,730 5,910 1,260 745 S 520 578 602 628 S25 628 540 578 8,890 5,490 1,230 760 4 530 628 590 628 715 602 565 793 10,600 4,530 1,070 745 6 565 615 565 670 640 590 602 1,690 9,730 4,030 930 745 6 578 628 565 700 628 590 578 2,220 9,170 4,030 860 745 7 578 655 552 730 590 590 565 2,220 9,450 4,350 825 745 8 578 640 552 745 57S 590 565 2,220 9,450 4,530 790 745 9 565 655 578 730 615 590 565 1,510 9,730 4,530 745 745 10 552 670 540 700 628 578 565 1,130 8,610 4,030 797 745 11 500 685 590 700 670 590 565 1,130 7,830 3,430 SOS 745 12 500 685 602 700 602 640 565 1,160 6,130 2,930 730 730 IS 552 670 615 700 590 640 578 1,180 4,710 2,630 745 745 14 590 615 640 730 602 602 578 1,200 4,890 2,630 745 790 16 602 578 655 760 590 602 578 1,230 6,590 2,930 715 790 16 602 590 685 745 578 602 578 1,890 8,090 3,170 715 775 17 540 602 700 745 578 602 578 2,530 7,570 3,290 730 775 18 510 615 700 628 57 S 602 678 2,630 6,590 3,290 745 775 19 520 615 700 640 578 590 590 2,630 5,290 2,830 760 775 20 552 602 685 745 578 602 602 2,630 4,030 2,730 760 760 21 565 540 670 745 565 602 602 2,630 3,430 2,630 745 760 22 552 520 670 745 565 590 911 2,630 3,870 2,630 730 760 23 552 552 670 745 565 590 1,090 2,630 5,090 2,630 715 760 24 552 565 700 745 565 602 1,090 2,730 6,830 2,350 775 760 25 520 565 715 745 552 590 1,110 2,730 7,830 2,220 767 760 26 520 565 715 730 540 590 1,110 2,730 8,090 2,220 775 760 27 565 565 715 730 565 578 1,110 2,830 7,830 2,300 775 745 28 578 540 700 730 578 578 1,110 2,730 7,310 2,090 745 745 29 578 530 6S5 730 . 578 1,110 2,730 5,690 1,820 730 745 SO 565 565 685 730 v 578 1,130 3,870 4,890 1,640 730 745 31 565 - 685 745 - 578 7,070 1,450 730 Second- Run-off In Month foot-days Mq?H|iT\iBi Hinlmm Mean acre-feet 17,106 602 5OO 552 33,930 17,937 685 520 598 35,580 19,881 715 540 641 39,430 399,194 5,690 265 1,094 791,800 22 114 760 628 713 43,860 17 ,238 825 540 616 34,190 700 578 600 36,890 April...... 21 ,813 1,130 540 727 43,270 May...... 68,031 7,070 2,195 134,900 216,650 10,800 3,430 7,218 429 600 July...... 100,460 5,910 1,450 3,241 199 300 25,457 1 ,280 V15 821 50^490 22,650 790 730 755 44,930 Water year 1937-; 8...... 567,836 10,600 500 1,556 1,126,000 TUOLUMNE RIVER BASIN 217 Don Pedro Reservoir near La Grange, Calif. Location.- Staff gage, lat. 37°42'48", long. 120°24'14", in SWi sec. 35, T. 2 S., R. 14 E., at Don Pedro Dam on Tuolumne River, 1 mile downstream from Rogers Creek and 5.5 miles upstream from La Grange. Zero of gage is at mean sea level. Records available.- October 19S4 to September 1938 (gage heights only, 1924-30). Remarks.- This storage reservoir is operated jointly for Turlock and Modesto Irrigation Districts. Elevation of crest of dam is 613.5 feet above mean sea level; spillway, 596.55 feet; and top of drum-type spillway gates, 605.55 feet. Water released from reservoir passes through power plant at Don Pedro Dam and is diverted into Turlock and Modesto canals at La Grange Dam, 4 miles downstream. Table shows total contents, but storage below 30,000 acre-feet is seldom used. Record of daily elevation furnished by Turlock and Modesto Irrigation Districts. Contents, In acre-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar, Apr. May June July Aug. Sept. 1 93,400 69,200 67 ,400 222,200 268 ,900 239 ,200 263,600 222,200 269,500 278,500 288,900 247 ,800 2 92,700 68,600 67 ,400 222,500 267,300 245 ,400 263,600 221 ,700 271,000 285,100 289 ,300 246,300 5 92,100 68,500 67,800 224,300 269,800 271,000 264,200 221,100 270,700 290,200 289 ,300 244,800 4 90,900 68 ,400 68 ,000 226,000 269,600 268,600 264,800 218,200 271 ,000 291,500 288,900 243 ,000 5 90,400 68,200 67,800 227,700 267,900 266,400 263,200 215,900 271,700 290,500 288,600 240,700 6 89,700 68,100 66,600 229 ,200 266,400 265,100 266 ,100 215,600 270,400 288,900 288,000 238 ,600 7 88,800 68 ,000 66,400 230 ,100 265,500 263,900 263 ,300 216,800 270 ,100 289 ,600 286,700 237,100 8 88,000 67,400 66,600 231 ,000 265,100 263,300 262,100 218 ,800 270,100 291,200 284 ,800 235,900 9 87 ,200 67,300 66,600 232,100 262,100 262 ,700 261,100 221,700 270,100 291,800 283,600 234 ,500 10 86,500 67,100 66 ,700 232,800 268,600 261,400 260,500 224,600 269,500 291,500 282,600 232,800 11 85,100 67 ,000 103,200 233,600 276,000 262,700 257,800 228,000 268 ,600 290,800 281,300 231,200 12 84,300 66,900 198 ,200 234,500 271,300 265,100 255,700 229,200 267,000 289,600 280,100 229,200 13 83 ,400 66,900 214,500 235,600 264,500 276,700 252 ,900 238,300 264,800 289,300 278 ,500 227,500 14 88,600 67,000 220,200 236 ,200 265,800 271 ,700 249,300 247 ,200 265 ,500 291,200 276,700 226 ,000 15 81,900 66 ,200 223,100 241 ,900 264 ,200 268,900 244,800 254,800 269 ,800 291,800 274,500 224,000 16 81,100 66,400 226,100 254 ,500 260,800 267,600 240,400 262,100 272,600 291,500 273,200 222,200 17 80,700 66,700 226 ,900 259 ,600 266,300 268,600 237,100 266,700 272 ,900 291,500 271 ,700 220,500 18 79,800 66,700 227,200 263,000 254,500 267,300 235,600 267,000 272,300 290,800 270,100 218 ,800 19 78 ,900 67,100 227,600 264 ,800 253,800 266,400 237,400 266,100 271,300 290 ,800 268 ,900 216,600 20 78,300 67,300 226,900 265,100 252 ,900 265,800 238 ,900 264,500 271 ,000 290,500 267,000 215,100 21 77,700 67,300 226,900 264 ,500 260,500 267,600 239,800 263 ,300 272,000 290,500 265,500 213,400 22 77 ,000 67,000 226 ,600 264,200 248,700 266,400 241 ,300 261,400 274,500 290,800 263,600 211 ,600 25 76,200 67,300 226,300 264,200 246,600 265,800 242 ,400 261,100 276,300 291,200 262,100 210,200 24 76,600 67,300 226,000 263,600 246,300 266,400 241,900 263,000 277,600 290 ,800 260,500 208,500 25 74,100 6V ,300 225,700 263,900 246 ,000 266 ,400 241,600 266,100 279,200 290,500 259 ,000 206,300 26 73,500 67,300 224,800 263,900 248,600 265,800 238,300 265,100 280,100 290,200 257,200 204.00C 27 72,500 67 ,500 224,300 264 ,200 243,900 265,100 253,300 266,100 280,400 290 ,500 255 ,700 202,400 28 72,000 68,000 224,000 263,900 239,200 264,500 228,000 266,700 280,100 290,800 254,100 200,700 29 71,300 67,700 223,400 264 ,500 _ 264,500 222,800 265,800 278,900 290,600 262,600 199,500 50 70,600 67,700 222,800 264,500 _ 264,200 222,200 265,100 279,500 289,300 251 ,100 197,800 51 69,900 - 222,200 264,200 - 263 ,900 - 266,700 - 289 ,600 249,300 - 218 TUOLUMNE RIVER BASIN Tuolmnne River above La Grange Dam, near La Grange, Calif. Location.- Water-stage recorder, lat. 37°42'35", long. 120°24'45", In NEi sec. 3, T. 3 S., R. 14 E., half a mile downstream from Don Pedro Dam, 3i miles upstream from La Grange Dam, and 5 miles upstream from La Grange. Altitude, about 330 feet. Drainage area.- 1,540 square miles. Records available.- March 1915 to September 1938. August 1895 to September 1917 at site at La Grange Dam, 3i miles downstream. Average discharge.- 22 years (1916-38), 2,217 second-feet; 43 years (1895-1938), 2,568 second-feet, using record of combined flow of river and canals for years 1895-1916. Extremes.- Maximum discharge during year, 34,400 second-feet Feb. 11 (gage height, 27.3 feet ), from rating curve extended above 18,000 second-feet; minimum, 37 second-feet during several days In November and. December. 1915-38: Maximum discharge, 38,100 second-feet (regulated) Mar. 25, 1928 (gage height, 29.6 feet); minimum, about 0.5 second-foot momentarily, on many days In October and November 1931. On Jan. 31, 1911, there occurred a maximum discharge of 60,300 second-feet, un regulated, (gage height, 16.45 feet, from stage graph constructed from frequent gage readings at former site at La Grange Dam), from rating curve extended above 18,000 second-feet. Remarks.- Records good. A small amount of water Is diverted for Irrigation; diversion through Hetch Hetchy aqueduct to San Francisco began Oct. 19, 1934. See records for Don Pedro and Hetch Hetchy reservoirs, and Lake Eleanor, which store water above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Get. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1,300 915 867 839 5,960 4,170 3,600 6,120 15,200 5,980 2,080 1,770 S 1,200 913 825 79S 5,270 5,430 3,490 6,260 17,800 5,440 1,790 1,830 S 1,050 923 846 885 7,710 12,400 3,710 6,260 17,100 6,680 1,790 1,810 4 1,180 919 866 871 7,400 9,300 4,530 6,120 18,600 7,26O 1,790 1,720 5 1,230 933 1,030 852 5,270 6,540 7,570 6,120 19,000 7,110 1,820 1,770 6 1,240 938 882 865 3,500 5,430 6,820 6,260 17,100 6,400 1,800 1,840 7 1,240 827 898 866 2,930 4,780 5,700 6,260 16,700 5,980 1,720 1,860 8 1,260 948 894 854 3,600 4,530 5,300 6,120 16,300 6,400 1,800 1,880 9 1,240 954 910 794 4,750 4,290 5,300 6,260 16,100 6,820 1,820 1,880 10 1,140 920 841 876 13,600 3,270 5,980 6,260 14,800 6,400 1,830 1,860 11 1,220 828 1,110 872 28,400 2,970 6,540 6,400 12,800 6,120 1,840 1,300 12 1,240 909 1,650 859 14,600 6,400 6,820 6,540 11,000 5,440 1,850 1,930 13 1,240 908 1,630 872 6,970 18,800 6,680 6,540 8,610 3,920 1,840 1,920 14 1,230 758 1,630 868 7,570 11,500 6,680 7,870 7,410 3,800 1,780 1,920 15 1,220 850 1,620 832 7,270 8,340 6,540 8,660 8,610 4,660 1,860 1,900 16 1,190 883 1,690 812 6,540 7,120 6,400 8,980 10,600 5,180 1,880 1,840 17 1,030 855 1,680 845 4,910 7,570 6,260 11,200 11,000 4,920 1,850 1,820 IB 1,210 869 1,640 1,270 4,05O 6,540 6,540 11,300 10,100 5,310 1,850 1,760 19 1,220 880 1,690 2,200 4,050 5,560 7,120 10,300 8,610 4,660 1,880 1,900 20 1,220 881 1,660 2,320 3,930 5,980 7,720 9,300 7,260 4,160 1,890 1,880 21 1,220 740 1,660 2,160 4,050 6,540 7,720 8,660 6,400 3,660 1,810 1,870 SS 1,220 872 1,650 2,040 3,930 5,700 7,870 8,500 6,260 3,560 1,870 1,860 23 1,200 895 1,650 1,760 3,270 5,040 8,180 8,500 7,560 3,680 1,880 1,870 24 1,090 880 1,660 1,600 8,770 5,840 8,500 8,820 8,910 3,560 1,840 1,860 25 1,230 744 1,560 1,760 2,680 5,700 8,820 9,620 9,960 3,320 1,860 1,780 26 1,220 817 1,560 1,800 3,600 5,040 8,820 9,960 10,300 3,320 1,870 1,900 27 1,200 838 1,650 1,840 4,170 4,410 8,820 10,300 10,400 3,440 1,860 1,870 28 1,180 750 1,660 1,760 4,170 4,410 8,660 11 ,000 10,300 3,440 1,790 1,860 29 1,180 855 1,650 2,040 4,410 7,870 10,300 8,610 3,320 1,890 1,860 SO 1,180 884 1,660 1,800 « 4,050 6,260 9,790 8,160 2,350 1,860 1,890 31 1,040 - 1,660 2,200 - 3,710 - 12,000 2,000 1,360 Eecond- MqT^Tmmi Mean Run-Off In Month f cot-days Minimum aore-feet October...... 1,300 1,040 1,196 73,570 26086 954 740 870 51,740 42 ',779 1,690 825 1,380 84,850 Calendar year 1937, ...... 1,008,330 11 ,700 488 2,763 2,000,000 41,010 2,320 794 1 323 81,340 176,920 28,400 2 ,680 6*319 350,900 195,770 18,800 2 970 6,315 388,300 April...... 3*490 6,694 398,300 Hay...... 256,580 11 )soo 6,320 8 ,277 508,900 351,560 6,260 11 720 697,300 July...... 148,190 7,260 2,000 4*780 293 ,900 57,150 2,080 1,720 1 844 113,400 55,510 1,930 1,720 1*850 110,100 Water year 1937-2 8...... 1,589,465 28,400 740 4,355 3,153,000 Peak discharge.- Feb. 11 (5 p.m.) 34,400 sec.-ft.s Kar. 13 (10 a.m.) 23,100 ec.-ft.j June 5 (7 a.m.) 20,400 sec.-ft. TUOLUMNE RIVER BASIN 219 Falls Creek near Hetch Hetchy, Calif. Location.- Water-stage recorder, lat. 37°58', long. 119°46', In NEi sec. 3, T. 1 N., R. 20 E., In Yosemite National Park, a quarter of a mile upstream from Wampana Falls, 1 mile upstream from mouth, and 2 miles northeast of Hetch Hetchy. Altitude, about 5,600 feet. Drainage area.- 45.2 square miles. Records available.- November 1915 to September 1938. Average discharge.- 22 years (1916-38), 137 second-feet. Extremes.- Maximum discharge during year, 6,300 second-feet Dec. 11 (gage height, 8.90 feet), from rating curve extended above 1,250 second-feet on basis of velocity-area studies; minimum, 0.1 second-foot Oct. 1-15 and Nov. 2-11. 1915-38: Maximum discharge, that of Dec. 11, 1937; no flow at times during sum mers or 1921, 1924, 1926, 1928-31, 1933, 1934, 1937. Remarks.- Records good except those for periods of missing gage heights, Apr. 16-18, AprT 20 to May 21, which were computed on basis of records for Cherry and Eleanor Creeks near Hetch Hetchy and are fair. No diversion above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Fell. Mar. Apr. *«y June July Aug. Sept. 1 0,1 0,2 11 38 59 114 83 200 1,500 692 107 13 2 .1 .1 10 50 64 171 109 150 1,180 756 105 12 3 .1 ,1 9 54 75 150 140 100 1,080 687 107 12 4 .1 .1 9 50 80 111 15O 100 1,180 575 93 11 5 .1 .1 8.5 44 88 101 121 150 1,180 488 78 10 6 .1 .1 9 39 89 93 107 150 1,040 484 70 9 7 .1 .1 9 35 88 86 114 200 1,110 550 69 8 8 .1 .1 9.5 32 78 80 138 300 1,080 600 66 7 9 .1 .1 41 30 85 72 171 350 1,080 555 62 6 10 .1 .1 1,300 28 80 68 168 400 938 474 53 5.5 11 .1 .1 3,970 27 78 74 191 500 905 390 44 5 12 ,1 .2 1,960 26 80 173 196 650 660 314 36 4,6 IS .1 .5 566 25 96 166 160 850 506 314 32 4.4 14 .1 1.7 275 30 96 104 142 1,000 615 320 30 4.3 16 .1 3,2 191 114 86 91 164 1,200 860 338 27 4.1 16 .8 1.8 148 81 102 96 200 1,000 1,040 344 24 3.9 17 1.1 30 121 102 105 94 300 900 938 372 23 3,8 18 1.6 15 104 86 77 86 350 800 780 362 23 3.8 19 1.6 11 91 78 70 83 390 650 655 290 21 3.9 20 1.4 25 78 77 70 104 550 500 438 266 19 3.8 21 1.3 31 78 69 69 89 550 400 402 250 18 3,5 22 1.1 22 68 74 TV 83 550 470 525 238 18 3.4 23 1.0 17 68 66 78 70 500 692 704 225 18 3.3 24 .9 21 68 60 83 75 450 860 938 193 18 3.2 25 .7 18 68 57 80 72 350 938 970 182 18 3.1 26 .6 15 57 64 77 70 300 892 905 184 18 2 9 27 .5 14 52 68 75 75 300 1,080 938 245 17 3)4 28 .4 13 44 62 78 89 350 1,460 872 191 16 6.5 29 .3 12 41 62 81 350 1,720 655 162 14 9 50 .2 11 40 59 77 300 1,720 610 140 13 12 31 .2 38 56 72 1,580 121 14 Seoond- Month foot-days MqX^TTTWI* Hi*!* Hean *£££.? Dot 15.2 1,6 0.1 0.49 30 Hoi 263.6 31 .1 8.79 523 Dec 9,542,0 ?,970 8.5 308 18,930 C 66,245,2 3,970 .1 181 131,400 Jan nary 1,743 114 25 56.2 3,460 Pet 2,263 105 59 80.8 4,490 Mar 2,970 173 68 95,8 5,890 7,944 550 88 265 15,760 & 21 ,962 1,720 100 708 43,560 Jun 26,284 1,500 402 876 52,130 Jul 11,302 756 121 365 82,420 1,271 107 13 41,0 2,520 Sej£5 185.4 13 2.9 6.18 368 1ater year 1937-3 85,745,2 3^970 .1 235 170,100 Peak discharge.- Dec. 11 (3 p.m.) 6,300 see.-ft.j May 29 (5 p.m.} 1,850 seo.-ft.j May 30 (5 p.m.) 1,850 see .-ft. 220 TUOLUMNE RIVER BASIN Cherry Creek near Hetch Hetchy, Calif. Location.- Water-stage recorder, lat. 38°00', long. 119°54', in SWi sec. 28, T. 2 N., R. 19 E., 2i miles (air line) northwest of Lake Eleanor Dam, 4 miles upstream from Eleanor Creek, and 7i miles northwest of Hetch Hetchy. Altitude, about 4,800 feet. Drainage area.- Ill square miles. Records available.- April 1910 to September 1938. Average discharge.- 28 years, 359 second-feet. Extremes.- Maximum discharge during year, 18,100 second-feet Dec. 11 (gage height, 25.1 feet from floodmarks), from rating curve extended above 4,000 second-feet on basis of velocity-area studies; minimum, 5 second-feet Nov. 6 and 7 (gage height, 1.08 feet). 1910-38: Maximum discharge, that of Dec. 11, 1937; no flow Sept. 6-12, 1910. Remarks.- Records excellent except those for periods of missing gage heights, Dec.10- 18, Mar. 9-26, which were computed on basis of records for Eleanor Creek near rfetch Hetchy adjusted for storage in Lake Eleanor and are fair. No diversion above station. Release from small reservoirs above station increases normal summer flow. Discharge, In second-feet, water year October 1937 to September 193S Day Got. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 5.5 5,5 53 100 160 514 292 591 2,800 1,640 160 19 a 5.5 5.5 48 180 208 948 405 527 2,870 1,590 149 16 3 51 5.5 41 180 202 495 495 431 2,870 1,390 147 14 4 24 5.5 43 160 217 337 551 539 3,220 1,140 126 13 5 12 5.5 43 134 268 278 471 655 3,010 1,090 104 12 6 8 5 46 115 257 254 367 742 2,800 1,140 84 11 7 7.5 5 49 104 217 234 367 832 2,870 1,260 77 11 8 6,5 5.5 44 96 189 224 467 1,090 2,800 1,260 72 10 9 6.5 5.5 266 86 237 200 567 1,340 2,660 1,140 66 10 10 6 5.5 7,800 84 257 200 583 1,540 2,400 968 58 9.5 11 5.5 9 11,600 84 240 350 635 1,700 2,220 810 49 9.5 12 5.5 20 4,000 84 217 1,100 615 2,160 1,760 720 40 9.5 13 5.5 21 1,600 79 214 600 487 2,660 1,440 765 34 9 14 15 31 800 220 230 400 463 3,010 1,810 810 31 8.5 16 97 34 600 530 224 350 523 3,380 2,280 810 30 8 16 26 27 500 292 208 350 615 2,870 2,400 832 29 8 17 16 273 400 352 217 350 878 2,520 2,100 878 28 8 18 11 76 300 274 195 350 1,260 2,220 1,760 788 27 8.5 19 9 77 224 227 183 350 1,390 1,760 1,590 583 27 13 20 8 248 180 205 174 BOO 1,590 1,440 1,240 535 27 11 21 7.5 144 169 211 183 400 1,590 1,260 1,390 487 24 9.5 22 7 82 147 234 202 350 1,590 1,540 1,640 439 25 9.5 S3 6.5 74 157 195 214 350 1,590 1,980 1,920 405 23 9 24 6.5 119 166 174 240 350 1,490 2,280 2,220 337 20 8,5 25 6 74 141 189 227 300 1,120 2,340 2,160 315 18 8 26 5.5 68 122 214 211 280 855 2,400 2,040 589 17 7.5 27 6,5 66 113 214 211 264 878 2,870 2,040 563 17 12 28 5.5 61 106 180 271 322 922 2,660 1,810 408 17 138 29 5.5 55 100 177 - 274 968 2,280 1,540 285 16 31 30 5.5 53 102 157 - 240 720 2,540 1,640 234 28 17 31 5.5 * 96 147 - 240 - 2,520 - 183 78 - Seoond- Mean Sun-Off In Month f cot-days Mq^TTTrcm Minimum acre-feet October...... 397.5 97 5.5 12.8 788 1,666.0 OIV4CK fO 5 55.5 3,300 30,066 11 ,600 41 970 59,620 164,692.4 11,600 4.5 451 326,700 5,678 530 79 183 11,260 6,073 268 160 217 12,050 11,754 1,100 200 379 23,310 April ...... 24,744 1,590 292 825 49,080 May...... 56,477 3,380 431 1,822 112,000 65,300 3 *22Q 1,240 2,177 129,600 July...... f^fOV^:9A. "ZQA 1,640 J.OO1 ftK 48,380 1,648 160 16 53.2 3,270 468.5 138 7,5 15.6 929 Water year 1937-28...... 228,656.0 11,600 5 626 453,500 Peak discharge.- Dec. 11 (about 2 p.m.) 18,100 sec.-ft.; May IB (7 p.m.) 3,940 seo.-ft.j June 4 (9?30 p.m.) 3,860 sec.-ft. TUOLUMNE RIVER BASIN 221 Lake Eleanor near Hetch Hetchy, Calif. Location.- Water-stage recorder, lat. 37°58', long. 119°53<, m mi sec. 3, Records available.- October 1919 to September 1938 (gage heights only, 1919-30). Hetch Hetchy water-supply system for San Francisco QV * ^ 2ve mean,,sea level. Water Is released down natural *OM lbu£ary 3° Cherry Creek, and discharged Into Tuoluime llable forreles: Table shows total contents, of which 1,800 acre-feet Is not Contents, in acre feet, water year October 1937 to September 1938 o«y Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. i 12,920 4,900 4,680 23,340 26,040 27 ,070 26,830 27,340 28,000 27,810 28,550 25,390 2 12,680 4,680 4,680 23,160 26,320 27,540 26,880 27,340 28,180 28,550 28 ,550 25,200 3 12,520 4,450 4,620 23,070 26,600 27,340 27,070 27,250 28,090 28,550 28,550 25,020 4 12,360 4,540 4,560 22,980 26,690 26 ,970 27,160 27,260 28 ,090 28,370 28,460 24,830 5 12,040 4,230 4,450 22,890 26,790 26,970 27,540 27,340 28,090 28,370 28,460 24,650 6 11,720 4,110 4,280 22,800 26,790 26,970 27,250 27,340 27,900 28 ,550 28.460 24,460 7 11,480 3,970 4,170 22,620 26,790 26 ,970 27,160 27,530 27,900 28,740 28,370 24,280 8 11,250 3,870 4,020 22,440 26,690 26,970 27,070 27,620 27,810 28,740 28,280 24,090 9 10,930 5,820 4,230 22,260 26,790 26,880 27,160 27,810 27 ,810 28,740 28,180 23,900 10 10,690 3,770 16,760 22,080 26,970 26,790 27,250 SB, 000 27 ,720 28,740 28,180 23,810 11 10,450 3,770 29,020 21,900 27,070 26 ,790 27,340 28,090 27,530 28,650 28,180 23,530 12 10,160 3,730 27,340 21 ,620 27,070 27,250 27,340 28,180 27,340 28,550 28,090 23,340 13 9,890 3,730 26,600 21 ,540 26,880 27,810 27,340 28,460 27,440 28,550 28,000 23,160 14 9,680 3,680 26,230 21,&40 26,970 27 ,440 27,160 28,740 27,340 28,460 27,900 22,980 15 9,410 3,680 25,950 21,990 26,970 27,160 27,180 28 ,650 27,440 28,570 27 ,810 22,800 16 9,200 3,680 25,760 22,530 26,790 27,070 27,260 28,660 27,530 28,370 27,720 22,620 17 9,000 4,020 25,760 22,980 26,790 27,070 27,340 28,280 27,530 28,370 27,620 22,440 IS 8.72Q 4,110 25,670 23,340 26,690 26,970 27,720 28,180 27,340 28,460 27,440 22,170 19 8, 510 4,170 25,580 23,720 26,790 26,970 28 ,180 28,000 27,250 28,460 27,340 22,080 20 8,240 4,340 25,480 24,090 26,690 27,160 28 ,180 27,620 27,070 28,650 27,250 21,990 21 7,960 4,560 25,480 24 ,280 26,690 27,160 28 ,280 27,440 27,070 28,740 27,160 21 ,720 22 7,690 4,680 25,480 24,650 26,690 26,970 28,180 27,440 27,160 28,740 26,970 21 ,440 23 7,410 4,680 25,580 24,830 26,690 26,970 28,090 27,620 27 ,250 28,740 26,880 21 ,260 24 7,140 4,85O 26,580 25,020 26 ,790 27,070 28,000 27,810 27,340 28,650 26,690 20 ,990 25 6,880 4,960 25 ,480 25,200 26 ,790 26,970 27,810 28,000 27,340 28,550 26,600 20,810 26 6,600 4,900 25,390 25,300 26,790 26,880 27,620 28,000 27,340 28 ,460 26,420 20,540 27 6,370 4,790 25,300 26,390 26,790 26,880 27,440 28,090 27,160 28,550 26,230 20,360 28 6,030 4,730 25,020 25 ,680 26,790 26 ,880 27,530 28,180 27,070 28,550 26,140 20,180 29 5,800 4,680 24,460 25,760 _ 26,880 27,620 28,000 26,510 28,560 25,950 20,000 30 5,520 4,680 23,900 25,760 _ 26,880 27,630 27,900 26,880 28,460 25,760 19,820 31 5,240 -1 23,530 25,860 - 26,880 - 27,900 - 28,460 25,580 - Net*.- Contents computed from midnight gage heights except those for period of faulty Intake action, Jan. 1 to June 17, which were computed from 7 a.m. readings of staff gage. Midnight gage heights for period of faulty intake action, Dec. 11 31, computed on oasis of 7 a.m. readings of staff gage. 222 TUOLUMNE RIVER BASIN Eleanor Creek near Hetch Hetehy, Calif. Location.- Water-stage recorder, lat. 37°58', long. 119°53', In SWi sec. 3, T. 1 N., R. 19 E., In Yosemlte National Park, 0.6 mile downstream from Lake Eleanor Dam, 1.1 miles upstream from Mlguel Creek, and 5i miles northwest of Hetch Hetehy. Altitude, about 4,600 feet. Drainage area.- 80 square miles (above gaging station). Records available.- November 1915 to September 1938. June to October 1901, November 1909 to November 1915 at site 1 mile upstream. Average discharge.- 28 years (1910-38), 218 second-feet. Extremes.- Maximum discharge during year, 10,500 second-feet Dec. 11 (gage height, 13.95 feet;, from rating curve extended above 1,500 second-feet on basis of velocity-area studies; minimum, 1.2 second-feet regulated Jan. 1 (gage height, 1.03 feet). 1909-38: Maximum discharge, that of Dec. 11, 1937; no flow Sept. 8-14, 1910, Oct. ' 15-21, 1930, Nov. 19, 22, 23, 1931, Dec. 6, 1933. Remarks.- Records good. No diversion above station. See record for Lake Eleanor, which stores water above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 142 137 40 190 80 348 199 542 1,470 30 39 85 2 142 137 40 249 91 718 241 522 1,590 62 39 84 a 121 115 40 152 110 745 334 442 1,510 361 39 86 4 91 47 50 152 148 402 456 428 1,550 474 39 88 5 127 49 84 154 171 285 514 502 1,470 330 39 B6 6 142 49 84 152 168 272 400 590 1,320 201 43 86 I 139 49 82 152 161 247 340 652 1,320 369 52 85 a 139 49 84 152 150 232 330 720 1,250 368 57 85 9 137 35 85 152 178 204 396 900 1,220 358 51 84 10 137 26 40 164 250 1S3 449 1,110 1,050 316 35 83 11 137 26 4,450 171 344 191 498 1,250 930 285 27 83 137 26 2,910 158 285 589 534 1,390 770 369 36 88 IS 137 26 1,140 27 226 820 470 1,630 698 262 42 91 14 137 26 630 96 232 522 393 2,020 675 256 49 91 15 135 9.5 452 66 201 3S6 376 2 r160 745 250 53 89 16 135 8.5 337 9 176 354 435 1,980 845 244 53 89 17 137 7.5 256 11 156 330 582 1,670 795 201 56 89 18 137 3.0 210 10 159 282 900 1,510 698 183 58 89 19 137 24 156 10 164 253 1,250 1,280 630 149 58 89 20 137 14 122 9.5 148 362 1,250 1,050 574 79 58 91 Si 137 3.2 107 10 139 358 1,280 870 498 83 63 91 137 16 88 14 141 282 1,220 870 510 135 65 91 23 137 50 81 30 148 241 1,110 1,080 554 137 66 96 24 137 30 96 34 164 285 1,050 1,280 626 128 73 101 25 137 36 92 39 173 259 870 1,430 675 124 75 101 26 134 71 95 51 178 236 675 1,390 652 122 77 101 137 85 210 65 178 SOI 618 1,51C 698 122 75 101 137 85 152 66 191 226 675 1,55C 630 123 75 99 137 68 362 58 2 39 720 1,360 675 101 81 99 SO 135 41 358 61 _ 210 652 1,280 262 75 84 110 31 137 351 66 - 196 1,360 - 52 84 Second- Run-off In Month foot-days MQTlim^ Minimum Mean acre-feet 8 inn 13,284 4,450 40 429 26,350 103,377.4 4,450 2.5 283 205,000 9 88.0 5,410 344 9,740 T R^ 20,700 19 2XY 38,120 May...... July...... 6,148 474 30 198 12,190 1,731 September...... 2,731 110 83 91.0 5,480 Water year 1937-3 129,940,2 4,450 3.0 366 257,700 Peak discharge.- Dec. 11 (3 p.m.) 10,600 sec.-ft.j May 14 (10i30 a.m.) 2,250 sec.-ft,; May 16 (3 a.m.) 2,250 sec .-ft. TUOLUMNE RIVER BASIN 223 South Fork of Tuolumne River near Oakland Recreation Camp, Calif. Location.- Water-stage recorder, lat. 37°49', long. 120°00', in SEt sec. 29, T. IS., R. 18 E., 75 feet downstream from highway bridge on Big Oak Flat road, half a mile south west of Oakland Recreation Camp, and 0.6 mile upstream from confluence with Middle Tuolumne River. Altitude, about 2,800 feet. Drainage area.- 87.6 square miles. Records available.- March 1923 to September 1938. Average discharge.- 15 years, 81.1 second-feet. Extremes.- Maximum discharge during year, 6,950 second-feet Dec. 11 (gage height, 10.00 feet), from rating curve extended above 1,000 second-feet on basis of velocity-area studies; min-imum, 10 second-feet Oct. 1. 1923-38: Maximum discharge, that of Dec. 11, 1937: minimum, 0.3 second-foot Aug. 23, 1934. Remarks.- Records good. No diversion above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oot. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 11 12 14 50 244 825 314 526 825 190 50 27 2 11 12. 14 76 198 2,190 338 600 825 180 49 26 S 15 12 14 72 543 948 373 512 795 171 47 26 4 15 12 14 60 255 590 545 486 738 160 46 26 5 14 12 14 56 202 421 991 495 645 149 45 26 6 13 12 14 52 164 347 562 495 640 144 44 25 7 13 13 14 50 138 311 482 521 610 137 43 25 S 12 13 14 47 128 294 470 535 595 129 43 26 9 12 13 17 46 374 267 504 595 595 122 42 25 10 12 13 500 45 766 247 495 648 532 114 40 25 11 11 18 3,130 44 1,240 276 504 698 502 108 39 24 12 11 18 542 44 4S1 1,510 504 776 423 102 38 24 13 11 14 218 43 297 1,530 454 830 378 98 38 24 14 14 16 148 77 552 750 414 918 388 93 37 23 15 19 16 117 767 252 600 400 948 412 90 36 22 16 17 15 99 222 210 590 414 859 416 86 36 22 17 15 32 87 242 176 576 486 803 367 83 35 22 18 14 24 79 184 191 470 648 776 339 78 35 22 19 13 18 71 151 236 417 750 724 318 73 34 25 20 13 16 65 120 200 698 724 660 278 73 33 23 21 13 18 62 101 180 521 724 615 269 70 32 22 22 22 17 61 96 176 428 724 600 280 66 32 22 23 12 16 64 86 175 390 724 682 292 64 32 21 24 12 19 53 79 176 586 698 738 292 61 32 21 25 12 17 52 77 175 446 672 795 275 60 31 22 26 12 16 52 74 171 400 576 825 259 63 30 22 27 11 16 52 72 166 383 548 855 241 65 30 24 28 11 15 52 73 221 393 548 765 222 60 30 38 29 12 15 51 77 _ 360 595 666 211 57 28 28 30 12 15 51 68 _ 383 576 699 204 54 28 26 31 12 - 50 95 - 311 - 795 - 52 28 - Seeond- Ma-r^mwBi Run-Off in Month f cot-days Minimum Mean acre-feet October...... 397 19 11 12.8 787 475 32 12 15.6 942 5,785 3,130 14 187 11,470 49,193.5 3,130 9.5 135 97,580 3,346 767 43 108 6,640 8,070 1,240 128 288 16,000 March...... 18, 398 2,190 247 593 36,490 April...... 16,757 991 314 559 33,240 May...... 21 440 948 486 692 42,530 13* 166 825 204 439 26,110 July...... 3,052 190 52 98.5 6,050 1,143 50 26 36.9 2,270 734 38 21 24.5 1,460 Water year 1937-3 8...... 92,763 3,130 11 254 184,000 Peak discharge.- Dec. 11 (4 p.m.) 6,950 see.-ft.» Mar. 2 (10 a.m.) 3,610 sec.-ft.} Ma*. 13 (3:30 a.m.) 2,290 see.-ft. -24 TUOLUMNE RIVER BASIN Middle Tuolumne River near Buck Meadows, Calif. Location.- Water-stage recorder, lat. 37°50', long. 120°00', in HWi sec. 28, T. 1 S., R. 18 E . , half a mile upstream from confluence with South Fork of Tuolumne River and 4 miles east of Buck Meadows. Altitude, about 2,800 feet. Records available.- November 1910 to September 1938. Extremes.- Maximum discharge during year, 2,910 seccnd-feet Dec. 11 (gage height, 10.4 feet, from f loodmarks), fron rating curve extended above 1,000 second-feet on basis of velocity-area studies; minimum, 1.5 second-feet Oct. 1 (gage height, 0.94 foot). 1917-38: Maximum discharge, that of Dec. 11, 1937; no flow Sept. 4-14, 1924, Aug. 12 to Oct. 5, 1931, Sept. 11-17, 1934. Remarks.- Records good except those for Dec. 10-12 , which were computed on basis of record of South Fork of Tuolumne River and are fair. Small irrigation diversion above station, Discharge, In second-feet, water year October 1957 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr, May June July Aug. Sept. 1 1.6 2.2 4.E 45 161 3EO 155 320 944 260 34 8 2 1.9 2.4 4.2 61 107 847 168 361 944 242 32 8 s 3.4 2.5 4.3 50 336 372 186 320 944 220 29 8 4 3.7 2.5 4.0 43 138 270 246 310 926 195 27 7.5 5 4.0 2.5 4.0 39 89 212 372 310 802 18E 26 8.5 6 3.5 2.5 4.0 34 76 188 231 320 836 166 S.5 7.5 7 3.2 2.6 4.0 36 69 171 214 340 836 155 24 7.5 8 3.0 2.6 3.8 34 70 164 210 361 819 138 23 7 9 2.7 2.6 5 32 190 145 222 416 819 124 22 7 10 2.5 2.6 250 32 425 135 220 472 734 115 21 7 11 2.4 5 1,500 31 707 164 223 532 655 107 18 6.5 12 2.2 6 320 30 222 584 229 612 571 101 17 6 13 2.4 4.3 164 29 145 571 223 718 508 94 16 6 14 3.0 4.6 110 54 179 320 204 836 545 88 16 5.5 15 4.3 5 90 379 115 280 197 890 584 83 16 5.5 16 7 5 76 94 99 300 201 854 571 79 15 5 17 4.8 7.5 67 96 88 270 231 802 520 74 14 5 18 3.8 10 58 76 94 231 290 802 472 68 13 5 19 3.2 7 50 64 105 214 340 718 427 63 13 6.5 20 2.8 6 46 48 91 E90 361 626 350 61 14 6 21 2.6 7.5 49 47 90 231 394 558 383 60 12 5.5 22 2.5 9 43 50 94 199 427 584 405 55 13 5.5 23 2.4 7 46 42 97 189 449 702 416 50 12 5 24 2.2 7 29 38 104 266 449 785 416 47 12 4.8 85 2.1 7 37 41 105 204 405 819 394 44 11 4.8 26 2.0 6 40 39 102 186 350 836 372 47 10 4.8 87 2.0 5 42 39 100 182 320 890 350 60 10 5.5 28 2.1 4.8 41 38 109 193 340 836 320 48 9.5 13 29 e.i 4.3 43 39 182 372 768 300 43 9 15 30 2.0 4.2 47 31 159 340 819 E80 39 9 9.5 31 2.1 45 69 152 908 37 8.5 Second- Month Maximum Run-off In foot-days Minimum Mean acre-feet Dot 89.5 7 1.6 2.89 178 Hoi 147.2 10 2.S 4.91 292 Dec 3,230.5 1,500 3.8 104 6,410 Calendar year 1937...... 36,281.7 1,500 1.4 99.4 71,970 Jan 1,780 379 29 57.4 3,530 Pet 4,307 707 69 154 8,540 Mar 8,191 847 135 264 16,250 Apr 11...... 8,569 449 155 286 17,000 May 19,425 908 310 627 38, 5SO Jim 17,443 944 280 581 34,600 Jul 3,145 260 37 101 6,240 Aug 531.0 34 8.5 17.1 1,050 Sep 206.4 15 4.8 6. 8S 409 ftater year 1937-3 67,064.6 1,500 1.6 184 133,000 Peak dlacharge.- Dec. 11 (about 4 p.m.) 2,910 sec.-ft.; Mar. 2 (9 a.m.) 1,330 aec.-ft.J June 1 (11 p.m.) 1,210 see.-ft. TUOUJMNE RIVER BASIN 225 Drainage area.- 98.4 square miles. Records available.- October 1925 to September 1938. Average discharge.- 13 years, GO.l second-feet. Extremes.- Maximum discharge during year, 13,500 second-feet Feb. 9 (gage height, 10.5 feet), from rating curve extended above 1,000 second-feet on basis of velocity-area studies; minimum, 0.5 second-foot Sept. 9. 1925-38: Maximum discharge, that of Feb. 9, 1938; no flow at times during summers of 1929-36. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 5.5 7 *10 34 1,460 -'800 166 tioo 14 17 2.0 0.9 2 5.5 6.5 - 10 45 414 --1,900 187 t200 13 18 2.2 .7 3 6.5 6 -"-10 64 2,280 1,390 165 tso 11 18 2.0 .8 4 6.5 6 "-10 59 1,190 657 305 teo 10 18 1.7 .9 6 7 6 *10 54 476 432 718 tso 16 17 1.4 .8 6 8 6 *10 51 248 376 219 44 9.5 16 1.2 .8 7 8 6 48 178 291 180 38 10 13 1.2 .7 a 7 6 9.5 44 142 264 172 t36 7.5 13 1.0 .7 9 7 6 10 39 3,160 219 162 +35 7.5 12 1.2 .6 10 8.5 6 72 35 5,250 184 162 8 10 1.1 .7 11 8.5 8 1,770 32 5,440 264 146 |33 8 11 1.2 .9 12 9.5 8 610 29 1, 220 1,080 139 32 8.5 12 1.2 1.0 13 11 8 120 32 530 3,070 162 34 8.5 11 1.4 1.2 14 12 8 70 40 1,180 898 124 30 9 11 1.2 1-1 15 15 8.5 46 1,490 556 574 tno 27 8.5 9.5 1.2 .9 16 12 11 34 176 366 1,080 tioo 28 8 6.5 1.2 .8 17 11 23 27 213 279 606 t95 32 7.5 7 1.2 .9 18 11 14 22 155 252 426 t90 32 7 7 1.4 1.0 19 10 4.5 18 99 418 312 t85 31 6.5 10 1.3 1.0 20 10 6 13 144 23? 509 tso 32 11 12 1.4 .9 21 9.5 9.5 12 68 192 384 t?o 30 24 12 1.7 1.0 22 8 9.5 45 *190 252 t65 24 24 9.5 1.7 1.0 23 V 10 44 34 -- ISO 219 t60 24 16 7 1.6 1.0 24 6 11 56 29 - -170 507 t65 22 21 6.5 1.4 .9 25 6 11 80 25 «160 291 t400 20 19 4.5 1.6 1.1 26 5.5 11 45 21 *160 230 t!20 18 16 3.3 1.9 1.2 27 5.5 11 35 21 *150 192 tioo 16 15 3.0 1.9 1.2 23 5 10 35 22 - 180 184 t90 17 16 ' 2.8 2.2 1.9 29 5 10 34 130 tl!5 tso 18 16 2.5 2.2 3.0 30 6 10 34 68 tso 16 18 2.2 1.3 2.8 31 6.5 34 501 84 15 2.0 1.2 Second- Maximum Run-off In Month foot-days Minimum Mean acre' -feet Dot 249.5 15 5 8.05 495 HOT 263.5 23 4.5 8.78 523 Dec 3,312.5 1,770 9.5 107 6,570 C alendar year 193 r ...... 39,847.4 7,290 1.0 109 79,040 Jan uary...... 3,847 1,490 21 124 7,630 Pel 26,663 5,440 142 952 52,880 Max 17,880 3,070 84 577 35,460 Api 4,707 718 60 157 9,340 Ma3 1,208 200 15 39.0 2,400 Jur 368.0 24 6.5 12.3 730 JuJ 304.3 18 2.0 9.82 604 Auf 46.4 2.2 1.0 1.50 92 Sei 32.4 3.0 .6 1.08 64 1Fater year 1937- 58,881.6 5,440 .6 161 116, 800 Peak discharge.- Feb. 9 (8 p.m.) 13,500 sec.-ft.j Feb. 10 (4:30 p.m.) 9,600 sec.-ft.j Feb. 11 (10:30 a.m.) 8,100 sec.-ft. *Gage height misslngj discharge computed on basis, of weather records and records for nearby streams. tStage-diseharge relation affected by dredging operation} discharge computed on basis of weather records and records for nearby streams. 226 TUOLUMME RIVER BASIN Modesto canal near La Grange, Calif. Location.- Water-stage recorder, lat. 37°40'04", long. 120°27'26", in SWi sec. 17, T. 3 S., R. 14 E., half a mile northeast of La Grange and about a mile downstream from in take at La Grange Dam on Tuolumne River. Altitude, about 260 feet. Records available.- April 1903 to September 1938. Average discharge.- 35 years, 335 second-feet. Extremes.- Maximum daily discharge during year, 1,530 second-feet June 23, 24; no flow at times. 1903-36: Maximum daily discharge, 1,820 second-feet July 1, 1935; no flow at times. Remarks.- Records excellent except these for periods of missing gage heights, Jan. 12-16, Apr. 1, when recorder was not operating and discharge was estimated by Modesto Irriga tion District. Canal diverts from right bank of Tuolumne River at La Grange Dam. Water used for irrigation in Modesto and Waterford irrigation districts. Gage-height record furnished by Modesto Irrigation District. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 483 8.5 0 50 4 1,010 800 1,100 491 624 2 485 0 0 28 169 795 795 1,100 691 624 3 473 0 0 29 248 592 776 1,100 722 620 4 468 0 0 29 248 588 924 1,100 715 620 5 468 0 0 27 246 588 1,120 1,090 708 624 6 478 0 0 27 244 588 1,120 1,100 739 622 7 478 0 0 27 241 586 1,130 1,100 725 620 8 X 646 0 0 27 245 590 1,120 1,100 743 616 9 592 0 0 29 246 592 1,110 1,020 744 527 10 485 0 0 31 246 590 1,110 911 741 478 11 596 0 0 29 338 764 1,110 906 749 487 12 601 0 4 18 496 987 1,100 900 749 487 13 594 0 5 16 496 1,000 1,110 903 768 489 14 597 0 5 18 496 1,160 1,120 908 476 489 16 585 0 5 17 498 1,220 1,120 906 491 491 16 563 0 19 16 498 1,230 1,120 913 489 489 17 480 0 510 15 498 1,230 1,120 1,030 483 489 18 485 0 978 15 500 1,220 1,100 1,180 482 492 19 565 0 1,060 15 500 1,220 1,110 1,280 482 494 20 570 0 1,020 15 492 1,190 1,100 1,290 480 489 21 558 0 1,010 15 492 1,080 1,430 1,210 478 483 22 579 0 1*010 6 703 1,210 1,520 1,200 482 483 23 554 0 1,010 0 1,000 998 1,530 1,190 480 483 24 494 0 481 0 1,010 807 1,530 1,180 480 485 25 550 0 26 0 1,010 788 1,520 1,140 478 485 26 489 0 26 0 1,020 793 1,190 1,100 478 489 27 491 0 27 0 1,020 788 1,100 1,100 485 491 28 491 0 27 0 1,010 788 1,100 1,110 492 487 29 491 0 27 1,010 786 898 1,100 496 485 30 489 0 27 1,020 783 1,100 710 570 483 31 377 0 28 788 496 622 Second- Mean Run-off in Month foot-daya Kaxiaiujtt Minim . acre-feet Oot 16,255 646 377 524 32,240 HOT 8-5 8.5 0 .28 17 Dec 0 0 0 0 0 Calendar year 193 7...... 154,897.5 1,620 0 424 307,200 Jannary. ... . 7,305 1,060 0 236 14,490 Fob 479 31 0 17-1 950 Mar 0 0 0 0 0 Apr 16,244 1,020 4 541 32,220 Kay 27,349 1,230 586 882 54,250 jun 34,033 1,530 776 1,134 67, 500 Jul 32,473 1,290 496 1,048 64,410 Aug 18,209 768 476 587 36,120 8ep 15,725 624 478 524 31,190 Water year 1937-38...... 168,080.5 1,530 0 460 333,400 TUOLUMNE RIVER BASIN 227 Turlock canal near La Grange, Calif. Location.- Water-stage recorder and concrete control, lat. 37°40'00", long. 120°26'25", near north line of NWi sec. 21, T. 3 S., R. 14 E., 2,400 feet downstream from Intake at La Grange Dam and 1.2 miles east of La Grange. Altitude, about 265 feet. Records available.- October 1898 to September 1938. Average discharge.- 40 years, 458 second-feet. Extremes.- Maximum daily discharge during year, 1,780 second-feet June 11; no flow for irrigation Oct. 2 to Mar. 16, Apr. 14-20. 1898-1938: Maximum daily discharge, 1,900 second-feet several days In May 1928; no flow for irrigation during some periods of each year. Remarks.- Records excellent except those for very low stages, which are good. Canal diverts water from left bank of Tuolumne River at La Grange Dam for irrigation in Turlock irrigation district and to supply town of La Grange. During fall and winter water is diverted from canal at tunnel 0.3 mile above gage, and after passing through La Grange power plant is returned to river. Gage-height record furnished by Turlock Irrigation District. Discharge, In second-feet, water year October 1937 to September 1933 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 108 0 904 980 1,350 1,450 1,020 497 2 0 0 1,100 794 1,360 1,600 461 547 S 0 0 1,120 800 1,360 1,620 425 559 4 0 0 1,140 789 1,500 1,570 448 453 5 0 0 1,160 794 1,650 1,320 427 503 6 0 0 1,110 797 1,650 1,210 427 581 7 0 0 1,120 806 1,640 1,350 341 578 8 0 0 1,150 954 1,650 1,520 422 610 9 0 0 1,170 1,150 1,720 1,540 430 670 10 0 0 1,180 1,370 1,760 1,490 425 715 11 0 0 1,170 1,420 1,780 1,510 438 664 12 0 0 869 1,420 1,760 1,510 443 787 13 0 0 200 1,430 1,640 1,510 435 810 14 0 0 0 1,600 1,600 1,510 1,220 765 16 0 0 0 1,690 1,600 1,510 1,270 779 16 0 0 0 1,690 1,590 1,500 1,330 708 17 0 357 0 1,710 1,570 1,510 1,290 701 18 0 424 0 1,700 1,590 1,500 1,280 604 19 0 0 0 1,710 1,580 1,510 1,320 749 20 0 0 0 1,500 1,460 1,630 1,340 766 21 0 210 527 1,380 1,370 1,650 1,270 795 22 0 3S4 1,520 1,370 1,380 1,740 1,300 'i 36 23 0 323 1,640 1,380 1,380 1,680 1,320 750 84 0 323 1,680 1,370 1,380 1,640 1,290 674 85 0 313 1,690 1,380 1,390 1,550 1,320 639 86 0 310 1,690 1,390 1,380 1,540 1,320 756 87 0 347 1,690 1,350 1,380 1,600 1,310 723 28 0 505 1,690 1,360 1,380 1,730 1,220 716 89 0 666 1,670 1,360 1,390 1,550 1,200 725 SO 0 772 1,320 1,350 1,380 1,050 622 739 31 0 850 - 1,340 - 904 567 - Second- Run-off In Month foot -days Maximum Minimum Mean acre-feet 108 108 0 3.48 214 0 0 0 0 0 0 0 0 0 0 Calendar year 1937 ...... 229,866 1,760 0 630 455,900 0 0 0 0 0 0 0 0 0 0 5,734 850 0 135 11,370 April ...... 28,510 1,690 0 950 56,550 Hay...... 40,134 It 710 789 1,295 79,600 45, 620 1,780 1,350 1,521 90,490 July...... 46,504 1 740 904 1,500 92,240 27,931 1^340 341 901 55,400 20,229 810 453 674 40,120 Water year 1937-2S...... 214,770 1,780 0 588 426,000 228 STANISLAUS RIVER BASIN Middle Fork of Stanislaus River at Sand Bar Flat, near Avery, Calif. Location.- Water-stage recorder, lat. 38°11', long. 120°09', in sec. 19, T. 4 N., R. 17 E., about a mile upstream from diversion dam of Pacific Gas & Electric Co. and Sand Bar Flat and 11 miles southeast of Avery. Altitude, about 2,650 feet (revised). Drainage area.- 318 square miles (at gaging station). Records available.- September 1905 to September 1938. Average discharge.- 32 years (1905-8, 1909-38), 686 second-feet. Extremes.- Maximum discharge during year, 26,500 second-feet Dec. 11 (gage height, 21.0 feet, from floodmarks), from rating curve extended above 6,000 second-feet on basis of velocity-area studies; minimum recorded, 71 second-feet Nov. 16. 1905-38: Maximum discharge recorded, that of Dec. 11, 1937; minimum, 30 second- feet Aug. 24, 1924. Remarks.- Records good except those for periods of missing gage heights, Dec. 4 to Apr. 21, May 13-24, June 10-12, 20-21, July 16-23, and 26-27, which were computed on basis of records of flow over diversion dam at Sand Bar Flat and are fair. Philadelphia Canal brings 30 to 50 second-feet from South Fork of Stanislaus River through Spring Gap power house Into Middle Fork above station. Storage at Relief Reservoir above station. Gage-height record and several discharge measurements furnished by Pacific Gas & Electric Co. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 272 124 125 310 350 870 830 1,940 5,250 2,300 585 243 a 268 123 124 340 380 1,350 940 1,900 5,390 2,150 568 237 z 276 121 123 330 430 1,100 1,150 1,670 5,540 1,940 585 239 4 272 119 120 310 390 890 1,350 1,730 5,840 1,670 532 237 5 260 118 120 300 380 790 1,350 1,900 5,390 1,580 476 233 6 254 116 120 280 370 740 1,250 2,300 5,110 1,5!!0 466 237 7 266 116 120 280 370 710 1,250 2,380 4,970 i,e: .0 452 245 8 262 115 120 270 370 690 1,150 2,620 4,690 1,6"0 439 241 9 244 115 140 270 470 650 1,300 3,060 4,430 1,5! !0 427 239 10 165 116 4,900 260 650 630 1,350 3,360 3,800 1,340 388 233 11 132 121 18,500 260 800 700 1,500 3,810 3,400 1,2! 10 352 237 12 127 120 4,500 270 600 1,400 1,550 4,560 2,900 1,1; >o 335 237 13 124 116 1.800 270 520 1,700 1,350 5,300 2,540 1,1(10 322 239 14 130 130 1.350 270 540 1,200 1,250 6,400 2,460 l.ldO 320 237 15 168 109 1,150 530 490 1,050 1,300 6,900 2,620 1,2!10 310 241 16 181 75 1,000 390 450 1,050 1,450 6,200 2,880 1,300 300 239 17 173 118 860 450 430 990 1,750 5,400 2,970 l,3dO 293 239 18 162 127 660 440 450 900 2,650 6,000 2,620 l,2fiO 318 243 19 152 91 550 410 430 880 3,250 4,200 2,380 1,2CO 298 263 20 135 115 490 370 420 1,200 3,250 3,500 2,100 1,2(0 279 218 21 131 204 470 360 430 1,000 3,450 3,150 2,000 1,150 272 233 as 128 135 430 390 450 910 3,580 3,350 1,900 1,100 266 233 S3 125 115 410 370 470 890 3,470 3,900 2,080 1,050 266 243 84 123 132 390 350 500 980 3,260 4,300 2,460 1,000 261 243 25 121 146 370 360 510 910 2,620 4,690 2,620 955 255 241 S6 121 138 350 360 470 870 2,220 4,830 2,540 900 253 239 27 120 132 350 340 460 850 2,300 5,390 2,540 860 249 233 28 119 132 340 320 520 940 2,460 4,970 2,380 812 243 293 29 118 128 330 320 _ 900 2,460 4,430 2,220 768 237 266 SO 119 127 330 330 _ 890 2,150 4,560 2,220 705 247 243 31 123 - 320 340 - 890 - 4,690 - 645 253 - Second- Run-off In MftXf THUIB Mean Month foot-days Minimum acre-feet October...... 5,371 276 118 173 10,650 3,694 204 75 123 7,330 40,962 18,500 120 1,321 81,250 Calendar -year 1937 ...... 295,402 18, 500 75 809 585,900 10, 450 530 260 337 20,730 13,100 800 350 468 25,980 29 520 1,700 630 952 58,550 April...... 59^190 3,580 1,973 117,400 Hay...... 122,390 6,900 1,670 3,948 242,800 100 240 5,840 1,900 3,341 198,800 July...... 39 1 325 2,300 645 1,269 78,000 10,847 585 237 350 21,510 7,242 293 218 241 14,360 Water year 1937-3 3 ...... 442,331 18,500 75 1,212 877,400 STANISLAUS RIVER BASIN 229 Melones Reservoir at Melones Dam, Calif. Location.- Staff gage and reference point, lat. 37°57'15", long. 120°30'45", near center or sec. 11, T. IN., R. 13 E., at Melones Dam on Stanislaus River, 0.1 mile downstream from Bear Creek. Records available.- June 1927 to September 1938. Remarks.- Water is stored In reservoir for irrigation and power. Top of spillway of dam is 723 feet above mean sea level, and top of drum gates Is 735 feet above mean sea level. Released water passes through power house 1 mile downstream from Melones Dam and flows down Stanislaus River to Goodwln Dam, where It Is diverted Into Oakdale and South San Joaquin canals. Table of contents, furnished by Pacific Gas & Electric Co., shows total amount, of which 2,630 acre-feet is not available for release. Contents, In acre-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 8,084 7,422 9,911 92,498 94,650 94,315 93,980 95,655 100,400 113,350 104,916 58,069 2 8,152 7,358 9,870 92,985 94,483 94,985 93,980 95,990 101,250 113,720 103,642 56,760 3 8,118 7,326 9,794 93,645 96,660 97,510 94,148 95,320 100,570 113,720 102,270 55,350 4 8,152 7,646 9,794 92,823 95,320 95,990 94,315 95,488 101,420 113,165 101,080 53,833 5 8,220 7,614 9,756 92,173 94,483 95, 153 95,665 95,823 101,590 113,535 99,720 52,331 6 8,286 7,582 10,03E 91,360 93,813 94,650 94,985 96,325 101,080 113,535 98,360 50,852 7 8,286 7,582 9,911 90,548 93,645 94,650 94,315 96,830 100,400 113,905 97,000 49,388 8 8,286 7,582 10,315 90,060 93,478 94,148 93,980 97,170 100,060 113,720 95,320 47,951 9 8,320 7,614 10,722 90,385 93,148 93,980 94,650 98,020 99,890 113,720 93,813 46,550 10 7,982 7,614 10,807 90,873 93,813 93,980 94,985 98,360 99,210 113,535 92,335 44,960 11 8,084 7,614 31,151 90,060 100,570 93,645 95,320 99,040 99,380 113,165 90,710 43,504 12 8,050 7,646 92,010 89,747 97,000 94,650 95,153 99,380 98,870 113,165 89,121 42,100 13 7,948 7,812 94,985 89,278 94,985 99,040 95,153 100,910 98,530 112,610 87,556 40,721 14 7,914 7,914 94,985 88,652 95,320 97,170 94,650 102,100 99,210 112,240 85, 877 39,272 15 7,778 7,880 95,823 88,182 94,818 95, 823 94,650 102,780 102,440 112,240 84,221 38,708 16 7,744 7,880 95,823 90,873 94,148 95,320 94,818 102,780 105,098 112,795 82, 430 38,238 17 7.846 7,914 94,650 92,823 93,645 95,488 95, 153 101,930 106,736 112,980 80,645 37,674 18 7,982 7,982 94,483 93,310 93,310 94,315 96,325 101,080 106,196 113,350 79,023 37,216 19 7,914 8,186 93,980 92,923 93,645 94,315 97,340 100,230 105, 644 112,795 77,260 36,670 20 7,914 8,254 93,813 93,310 93,645 94,483 97,170 99,040 105,644 112,425 75,508 36,124 21 7,846 8,426 93,310 93,148 93,813 94,985 97,680 98,190 103,460 112,055 73,922 35,760 22 7,812 8,930 92,985 93,148 93,310 94,315 97,510 98,360 104, 552 111,686 72,344 35,315 23 7,778 9,002 92,823 93,310 93,645 94,148 97,510 99,380 107,832 111,315 70,940 34,870 24 ,744 9,110 92,985 93,478 93,310 95,153 97,340 99,720 110,760 110,760 69,400 34,514 25 ,646 9,110 93,310 92,660 93,148 94,650 97, 340 100,570 112,795 110,211 68,050 34,158 26 ,582 9,528 93,478 92,335 93,148 94,818 95,990 100,230 113,535 109,479 66,570 33,721 27 ,582 9,566 93,645 92,335 93,478 94,650 95,655 101,080 113,535 108,747 65,134 33,461 28 ,518 9,604 93,148 92,173 93,645 94,483 95,990 101,080 114,090 108, 198 63,714 33,288 29 ,486 9,911 92,498 92,660 _ 94,315 96,325 100,230 114,090 107,649 62,208 33,018 30 ,454 9,911 92,498 93,645 _ 94,316 96,158 100,230 114,275 106,918 60,970 32,845 31 ,486 - 92,498 93,645 - 93,980 - 100,400 - 106,008 59,506 - STANISLAUS RIVER BASIN Stanislaus River below Melones power house, Calif. Location.- Water-stage recorder, lat. 37°56'50", long. 120°31'45", near line between sees. 10 and 15, T. IN., R. 13 E., 300 feet downstream from power house, half a mile upstream from Bear Gulch, and 1 mile downstream from Melones Dam. Altitude, about 500 feet. Drainage area.- 898 square miles. Records available.- January 1931 to September 1938. Extremes.- Maximum discharge during year, 17,900 second-feet Feb. 11 (gage height, 15.5 reetj, from rating curve extended above 15,000 second-feet; minimum, about 1.0 second- foot Dec. 9. 1931-38: Maximum discharge, 19,300 second-feet (revised) Feb. 22, 1936 (gage height, 16.1 feet), from 1938 rating curve; minimum, about 1 second-foot (regulated) Feb. 6, 1933, and Dec. 9, 1937. Remarks.- Records excellent. Discharge for period of missing gage heights, Mar. 12-18, computed on basis of unpublished records for station above power house and of flow through power house. Many diversions and several reservoirs upstream from station (see p. 229for records of storage in Melones Reservoir). Gage-height record and results of two discharge measurements furnished by Pacific Gas & Electric Co. Discharge, In second-feet, water year October 1937 to September 1933 Day oet. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 264 149 222 356 2,660 2,880 2,440 4,400 10,400 3,880 l',350 1,080 2 28V 160 220 419 2,280 7,540 2,440 5,210 11,600 3,500 1,350 1,080 3 294 54 216 1,360 5,630 7,280 2,780 4,010 11,000 3,260 1,350 1,060 4 292 155 218 1,160 3,620 4,790 3,260 4,010 12,000 2,660 1,340 1,070 5 292 156 15 1,020 2,380 3,620 4,790 4,140 11,600 2,330 1,340 1,070 6 292 155 221 1,020 1,670 2,720 3,880 4,660 11,200 2,220 1,340 1,080 7 280 147 14 988 1,430 2,960 3,260 4,930 10,400 2,380 1,340 1,080 8 296 148 2.3 660 1,560 2,500 3,020 5,350 9,800 2,380 1,340 1,080 9 292 148 280 47 2,000 2,110 3,140 6,920 9,400 2,330 1,340 1,080 10 249 150 346 1,020 8,880 2,160 3,260 7,460 8,000 2,160 1,330 1,070 11 190 144 2,560 641 15,900 2,160 4,270 8,200 7,280 1,890 1,320 1,070 12 214 150 6,290 790 7,680 4,040 3,880 9,200 5,780 1,720 1,320 1,070 13 214 164 4,610 805 3,850 9,950 3,750 11,200 5,070 1,720 1,320 1,070 14 212 164 3,200 1,020 4,010 6,840 3,260 12,800 3,500 1,620 1,320 805 16 211 166 2,910 685 3,260 4,660 3,260 13,700 3,880 1,360 1,320 599 16 212 162 2,920 75 2,550 3,660 3,380 13,700 4,790 1,510 1,320 599 17 186 168 2,240 902 2,110 4,720 3,620 12,400 5,490 1,340 1,320 599 18 182 183 1,850 1,530 1,780 3,720 5,780 11,400 5,490 1,780 1,320 599 19 184 188 988 890 1,650 3,380 7,820 10,000 4,140 1,720 1,310 599 20 188 184 1,570 1,030 l.tlO 4,010 7,640 8,000 4,790 1,560 1,260 578 21 184 14 1,060 902 2,110 4,530 8,600 6,570 3,260 1,460 1,140 557 22 184 210 1,110 768 1,160 3,620 8,200 6,740 1,780 1,440 1,100 557 23 183 215 805 775 2,000 3,140 8,200 8,800 2,220 1,430 1,100 529 24 192 203 634 1,300 1,670 4,010 7,640 9,600 3,380 ,420 1,100 508 2? 192 14 634 970 1,510 3,260 7,460 10,600 4,270 ,400 1,100 508 26 167 210 648 845 1,260 3,260 5,490 10,200 4,400 ,380 1,100 508 27 166 212 997 890 1,290 1,960 5,070 11,400 4,010 ,380 1,090 508 28 170 15 1,020 632 2,000 3,080 5,630 11,200 3,750 ,370 1,090 508 29 172 208 730 324 2,900 5,930 9,400 3,750 ,370 1,080 508 30 163 211 620 805 2,600 5,490 9,400 4,400 ,360 1,080 501 31 167 508 1,370 2,440 10,400 1,360 1,080 Second- Month Mmjr^iiixffn Mean Run-off In foot-days Minimum acre-feet Oat ober...... 6,771 296 163 218 13,430 Hon 4,607 215 14 154 9,140 Dec 39,658.3 6,290 2.3 1,279 78,660 Calendar year 1937...... 581,876.3 9,070 2.3 1,594 1,154,000 Jan 25,999 1,530 47 839 51,570 Fel 89,410 15,900 1,160 3,193 177,300 Mar 121,500 9,950 2,110 3,919 241,000 Apr 146,640 8,600 2,440 May 4,888 290,900 266,000 13,700 4,010 6,581 527,600 Jun 190,830 12,000 1,780 6,361 378,500 Jul 58,690 3,880 1,340 Aug 1,893 116,400 38,610 1,350 1,080 1,245 76,580 Sep 23,530 1,080 501 784 « ater year 1937-3 1,012,245.3 15,900 2.3 2,773 2,008,000 STANISLAUS RIVER BASIN 231 Location.- Water-stage recorder, lat. 38°14', long. 120°17', In sec. 35, T. 5 N., R. 15 E., 700 feet upstream from Intake of Utica Mining Co.'s canal, 3i miles upstream from Beaver Creek, and 5 miles northeast of Avery. Altitude, about 3,400 feet. Drainage area.- 163 square miles. Records available.- July 1914 to September 1922, November 1928 to September 1938. Average discharge.- 17 years (1914-22, 1339-33), 415 second-feet. Extremes.- Maximum discharge during year, 17,700 second-fest Dec. 11 (gage height, 14.1 feet, from floodmarks), from rating curve extended above 3,400 second-feet on basis of AvT studies; minimum, 32 aecond-feet Oct. 19 (gage height, 0.97 foot). 1914-22, 1928-38: Maximum discharge, that of Dec. 11, 1937; minimum, 5.5 second- feet Dec. 6, 7, 1929. Remarks.- Records excellent except those for periods of faulty ga^e-height record, Dec. II, 12, June 27-29, July 1-3, which were computed on basis of partial record, for gage readings by observer, and records for nearby streams and are fair. Flow regulated by storage in three reservoirs abovs station and diversion from Beaver Creek. Rating table, water year 193V-38 (gage height, In feet, and discharge, In second-feet) 1.0 5.0 318 5.5 1,650 8.0 4,800 10.5 9,200 1.4 63 3.5 470 6.0 E,140 8.5 5,600 11.0 10,200 1.8 102 4.0 655 6.5 2,700 9.0 6,400 11.5 11,300 2.2 152 4.5 900 7.0 3,340 9.5 7,300 12.0 12,400 2.6 224 5.0 1,230 7.5 4,050 10.0 8,EOO 12.5 13,600 Discharge, In aecond-feet, water year October 1937 to September 1938 Day oet. EOT. Dso. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 50 40 60 182 245 595 488 1,270 4,200 900 75 51 S 65 40 60 220 227 1,000 615 1,230 4,200 750 71 53 S 83 40 58 232 268 745 770 1,060 4,200 575 66 53 4 65 40 57 210 239 558 872 1,200 4,650 505 61 59 6 55 39 56 194 220 470 795 1,470 3,980 451 55 64 6 48 40 54 180 216 432 635 1,600 3,550 416 51 63 7 46 41 53 171 212 400 595 1,740 3,410 397 48 63 8 43 41 53 163 218 382 678 S.090 3,200 379 45 62 9 47 41 57 154 300 355 872 2,580 2,880 343 42 62 10 53 44 3,240 149 412 340 930 2,880 2,580 302 49 61 11 53 57 12,^00 148 470 394 1,020 3,200 2,360 261 52 61 12 5E 56 3,620 145 343 1,200 1,060 3,830 1,890 224 51 61 13 52 52 1,060 142 295 1,370 820 4,960 1,650 212 59 61 14 60 58 700 144 285 770 770 5,440 1,740 198 57 60 16 66 53 558 290 263 655 POO 5,440 1,940 183 57 60 16 49 49 464 245 243 635 1,020 4,800 1,990 176 57 60 17 36 103 400 285 230 575 1,310 4,200 1,700 170 55 60 18 34 81 361 254 245 522 2,140 3,760 1,350 162 54 60 19 35 59 318 232 243 505 2,420 2,820 1,120 145 54 64 20 40 68 280 216 2S8 930 2,470 2,250 930 135 55 61 21 39 119 261 198 239 655 2,580 2,140 990 120 52 61 22 39 70 245 228 256 558 2,580 2,640 1,060 112 51 60 23 45 60 245 224 268 522 2,520 3,340 1,090 110 49 60 24 43 72 230 200 297 635 2,580 3,690 1,120 110 48 60 25 41 68 220 200 302 540 1,890 3,830 1,060 102 48 61 26 38 61 210 214 295 505 1,520 4,050 990 102 46 61 27 44 60 200 228 295 505 1,650 4,350 900 162 45 65 28 42 58 193 222 324 595 1,890 3,830 900 135 45 69 29 41 60 187 218 _ 540 1,990 3,410 960 115 50 64 30 37 60 183 191 - 470 1,520 3,550 1,090 97 49 63 31 38 - 183 204 - 460 - 3,830 82 50 - Second- M^x^l jrrtjn Rtm-of f In Month foot -daya Minimum Mean acre-feet October...... 1,479 83 34 47.7 2,930 1,730 119 39 57.7 3,430 26,766 12,900 53 863 53,090 Calendar year 1937, ...... 176,499 12,900 29 484 350,000 6,283 290 142 203 12,460 February...... 7,688 470 212 275 15,250 18,718 1,270 340 604 37.130 April...... 41,900 2,580 488 1,397 83,110 May...... 96,480 5,440 1,060 3,112 191,400 63,680 4,650 900 8,123 126,300 July...... 8,131 900 82 262 16,130 1,647 75 42 53.1 3,270 1,823 69 51 60.8 3,620 Water year 1937-3 8...... 276,325 12,900 34 757 548,100 Peak discharge.- Dec. 11 (about 9 a.m.) 17,700 sec.-ft.5 Hay 13 (10p.m.) 6,760 Hay 14 110 p.m) 7,300 sec.-ft. 232 STANISLAUS RIVER BASIN South. Fork of Stanislaus River near Long Barn, Calif. Location.- Water-stage recorder and masonry control, lat. 38°05', long. 120°11', in sec. 25, T. 3 K., R. 16 E., 600 feet downstream from Lyons Dam and 2 miles west of Long Barn. Altitude, about 4,100 feet, Drainage area.- 67.2 square miles. Records available.- November 1937 to September 1938. Extremes.- Maximum discharge during period, 2,070 second-feet June 2 (gage height, 7.14 feet), from rating curve extended above 1,400 second-feet; no flow Nov. 8-14 and Dec. 1-8, 1937. Remarks.- Records good. Flow regulated by storage in Lyons Reservoir (capacity, 5,500 acre-feet) and Strawberry Reservoir (capacity, 17,900 acre-feet).and by diversions above station for power and domestic use. See record for Tuolumne Canal,which diverts at Lyons Dam. Philadelphia Canal diverts at site about 12 miles upstream into basin of Middle Fork of Stanislaus River. Gage-height record and results of four discharge measurements furnished by Pacific Gas & Electric Co. Rating table, water year 1937-S8 (gage height, in feet, and discharge, in second-feet) 0.2 1.0 207 5.0 2.5 1.3 286 5.5 1,140 1.6 382 6.0 1,415 1.9 129 500 6.5 1,710 2.2 166 660 Discharge, In second-feet, water year October 1937 to September 1938 Day Oot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 59 42 393 197 2S6 1;170 474 2.2 1.8 2 0 73 42 734 207 104 1,320 543 1.6 1.8 a 0 69 147 462 230 259 1,280 462 1.3 1.8 4 0 62 122 322 302 205 1,650 34V 1.3 1.6 6 0 60 102 261 404 176 1,470 1.3 1.6 6 0 55 90 230 313 278 1,220 273 1.3 1.6 7 0 52 89 207 286 269 1,330 1.3 1.6 8 0 0 52 89 196 286 269 1,280 170 1.3 1.6 9 0 .1 57 194 180 895 269 1,300 1V4 1.3 1.6 10 0 1.6 58 278 170 313 269 1,110 C01 1.3 1.8 11 0 2.2 57 372 203 304 202 1,000 153 1.6 1-8 12 0 250 55 230 487 286 413 785 69 1.9 1.8 13 0 214 53 178 528 261 332 282 1.9 1.8 14 0 197 63 158 362 230 462 554 ISO 1.9 1.6 16 .1 186 199 126 304 222 500 930 129 1.8 1.4 16 .1 126 109 114 304 230 680 1,030 94 1.8 1.3 17 .6 102 136 105 278 261 830 930 96 1-8 l.S 18 .2 79 121 109 245 342 1,030 762 95 1.8 1.0 19 .2 62 111 107 237 426 700 574 55 1-8 .9 SO .2 56 96 100 342 450 563 276 56 1.8 .8 21 .2 59 90 104 278 462 342 152 4£ 1.8 .8 22 .2 84 88 122 245 450 514 648 8 1.8 .9 S3 .2 90 83 129 245 415 762 574 1.4 1.8 .9 24 .2 67 77 140 286 393 955 960 1.8 1.8 .9 25 .2 65 77 156 245 191 1,050 880 1.9 1.8 1.0 26 .2 64 75 193 230 147 1,000 642 1.3 1-8 1.0 27 .2 63 68 196 222 342 1,300 426 31 1.8 1.0 28 .2 64 25 214 230 352 1,250 487 39 1-6 1.0 29 .2 62 22 214 409 1,000 574 IS 1.6 1.0 30 .1 62 18 194 322 1,060 590 3.0 1.6 1.2 31 54 22 187 1,030 2.4 1.6 Seoond- Run-off In Month foot-daya Mqy3]n\fln Mlnlanra Mean acre-feet Oot Ko7 ember 8* 31 3.3 0.6 0 0-14 6.6 December... 2,009.9 250 0 64-8 3,990 C alendar year Jan 2,242 199 18 7E.S 4,460 Fob 4,048 372 42 145 8,030 Mar 9,021 734 170 291 17,890 Apr 11...... 9,328 462 147 311 18,500 Kay 18,369 1,300 104 593 36,450 Jim 26,186 1,650 152 873 51,940 Jul 4,066.8 543 1.3 131 8,070 Aug 61.3 2.2 1.3 1.65 108 Sap 40.1 1.8 .8 1.34 80 I he perio 149,500 Hote. Record began HOT. 8, 1937. STANISLAUS RIVER BASIN 233 Tuolumne canal near Long Barn, Calif. Location.- Water-stage recorder arid concrete control, lat. 38°05', long. 120°11', in sec. 25, T. 3 II., R. 16 E., ZOO feet downstream from intake, 250 feet downstream from Lyons Reservoir on South Fork of Stanislaus River, 2 miles west of Long Barn and 14 miles northeast of Sonora. Altitude, about 4,100 feet. Records available.- October 1937 to September 1938. Extremes.- Maximum daily discharge during year, 54 second-feet June 26, 27, July 1; no flow Oct. 4-6, Apr. 26 to June 7. Remarks^.- Records good except those for periods of missing gage heights, June 8, 11, 12, 16, 18-20, which, were computed on tasis of trend of flow in the river and are poor. Canal diverts from left bank of South Fork of Stanislaus River for power and domestic supply in vicinity of Sonora. Discharge, In second-feet, »ater year October 193V to S«ptember 1938 Day Oct. HOT, D«o. Jan, Feb. Mar. Apr. May June July Aug. Sept. 1 21 15 7 25 87 22 0 54 24 £7 2 31 15 7 26 26 28 22 0 5E E4 E7 3 16 12 7 25 26 26 28 0 53 25 27 4 0 IE 7 25 26 86 E2 0 53 26 £7 E 0 15 7 25 26 26 23 0 53 27 EV 6 0 15 6.5 25 26 26 0 43 £7 27 7 e 15 7 25 26 25 28 0 36 E7 2V a 19 3.7 6.5 26 26 25 28 7 34 £7 27 9 19 5.5 7 26 26 25 22 *14 34 27 27 10 19 13 7 26 25 25 82 »18 34 27 27 11 19 11 10 £5 24 25 22 20 33 27 27 12 19 11 9 25 84 26 22 22 34 E7 26 13 19 11 5 86 24 26 22 *26 34 27 26 14 19 11 4.8 27 25 25 82 «26 34 27 26 16 19 10 4.7 27 86 83 2E *32 32 27 26 16 18 10 4.8 86 25 22 E3 32 34 27 26 17 18 10 5 26 25 22 23 *32 34 27 26 18 19 10 4.8 26 25 2£ 23 36 34 27 26 19 16 12 4.B 25 25 81 23 40 34 27 £6 20 15 13 9.5 2B 25 28 22 *45 34 27 E6 21 15 13 13 25 25 22 21 52 34 27 26 22 15 13 16 25 25 28 20 5E 30 27 £6 23 15 13 20 25 25 21 19 53 26 £7 26 24 15 13 23 85 25 2E 19 53 25 27 E5 25 15 13 24 25 26 E2 7 53 23 27 26 26 15 13 24 24 26 22 0 54 24 28 2_5 27 15 13 84 25 26 22 0 54 25 27 25 28 15 13 24 84 26 22 0 53 E5 27 26 29 15 8 84 24 22 0 48 24 27 25 SO 15 7 24 24 28 0 53 24 E7 24 31 15 25 25 82 E4 27 Second- IHti^yirmi Run-off In Month foot-days MaxisnsB Mean aore-faet Oot 469 21 O 15.1 930 Ho-! en 94r ...... * 352.2 15 3.7 11,7 699 Dec 572.4 25 4.7 12.0 739 C al radar year 195 Jan 783 27 24 25.3 1,550 Fat 711 26 24 25.4 1,410 Max 734 28 21 £3.7 1>460 API 531 23 0 17.7 1.06O Maj 0 0 0 0 0 Jui 875 54 0 29.2 1,740 Jul 1,067 54 23 34.4 2,120 Au« 829 28 24 26.7 1,640 S«i 783 27 24 26.1 1,650 1 «t»r year 1937-3 7,506.6 54 0 20.6 14,890 Conputed from gage readings mada once dally or oftener. 234 STANISLAUS RIVER BASIN South San Joaquln canal near Knights Ferry, Calif. Records available.- May 1914 to September 1938. Average discharge.- 19 years (1914-30, 1931-32, 1936-38), Extremes.- Maximum dally discharge during year, 1,030 second-feet May 9-11, 14; no flow Nov. 17 to Dec. 18, Jan. 17 to Apr. 8. 1914-38: Maximum daily discharge, 1,070 second-feet July 1-3, 1921; no flow at times during each year. Remarks.- Records good except those for periods of missing gage heights, May 28, 29, June 30, July 1, 6-8, which were computed on basis of twice dally staff-gage readings and are fair. Canal diverts water from right bank of Stanislaus River at Goodwin Dam for irrigation in Oakdale and South San Joaquln Irrigation districts.' Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July lug. Sept. 1 134 56 0 351 0 743 379 970 888 642 2 184 41 0 357 0 750 891 968 881 642 3 185 26 0 403 0 790 929 959 867 630 4 186 18 0 398 0 915 949 966 864 634 5 190 20 0 386 0 966 947 931 862 640 6 186 27 0 388 0 992 942 980 861 642 7 184 30 0 388 0 992 958 980 866 64S 8 179 38 0 370 0 1,000 961 980 864 642 9 179 44 0 287 34 1,030 959 976 867 645 10 178 43 0 159 58 1,030 988 974 866 656 11 153 39 0 373 70 1,030 980 964 859 652 12 114 66 0 354 120 1,010 968 964 854 644 13 78 41 0 357 99 1,010 978 971 850 645 14 98 12 0 360 87 1,030 974 971 851 466 16 115 1.3 0 281 95 1,020 976 912 850 189 16 104 .7 0 103 IS 3 1,020 993 901 853 190 17 73 0 0 0 138 908 1,010 896 851 189 18 47 0 0 0 328 883 1,000 949 850 189 19 87 0 113 0 727 959 959 956 850 188 20 46 O 315 0 890 949 969 942 819 181 21 55 0 379 0 915 964 961 930 704 150 22 54 0 440 0 940 986 963 940 636 152 23 69 0 450 0 958 1,010 974 946 634 153 24 68 0 474 0 949 1,010 983 947 634 145 25 58 0 492 0 847 1,000 971 939 639 145 26 68 0 496 0 742 920 971 922 650 147 27 52 0 502 0 814 879 969 908 642 149 28 38 0 499 0 890 890 993 906 650 150 20 44 0 424 0 838 900 983 898 644 150 30 37 0 384 0 750 876 980 890 642 150 31 40 354 0 - 883 ~ 890 642 ~ Second- Run-off in Month foot-days Maximum Minimum Mean acre-feet October...... 3,332 190 37 107 6,610 503.0 66 0 16.8 998 December...... 5,322 502 0 172 10, 560 Calendar year 1937...... 137,239.2 1,030 0 376 272,200 5,315 403 0 171 10,540 0 0 0 0 0 March...... 0 0 0 0 0 April ...... 11,412 958 0 380 22 640 May...... 29,344 1,030 742 947 58*200 1,010 879 965 57 440 July...... 29 276 890 944 58*, 070 24^290 888 634 784 48,180 11,439 656 145 381 22, 690 Water year 1937-2 8...... 149,191.0 1,030 0 409 295,900 STANISLAUS RIVER BASIN 23E Oakdale canal near Knights Ferry, Calif. Location.- Water-stage recorder, lat. 37°51'30", long. 120°38'00", In SEi sec. 10, T. 1 S., R. 12 E-, half a mile downstream from head gate at Goodwln Dam on Stanislaus River and 4 miles upstream from Knights Ferry. Altitude, about 350 feet. Records available.- May 1914 to September 1938. Average discharge.- 20 years (1914-32, 1936-38), 93.8 second-feet. Extremes.- Maximum dally discharge during year, 402 second-feet July 30; no flow Nov. 11 1914-38: Maximum dally discharge, that of July 30, 1938; no flow for some periods of each year. Remarks.- Records fair. Canal diverts water from left bank of Stanislaus River at Good- win Dam for Irrigation In Oakdale Irrigation district. Gage-height record and result of one discharge measurement furnished by Oakdale Irrigation District. Discharge, In second-feet, water year October 1937 bo September 1938 Day Dot. HOT, Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 Ill 122 0 98 391 394 400 364 2 111 106 0 105 392 396 399 364 3 112 104 0 154 391 394 398 362 4 113 76 0 190 393 394 398 364 6 114 100 0 263 393 395 399 366 6 113 105 0 298 395 396 401 366 1 110 115 0 314 396 398 400 366 a 111 115 29 335 396 397 400 366 9 112 110 72 343 396 396 401 357 10 110 104 76 342 396 397 400 352 11 91 35 103 344 397 396 400 352 12 71 0 142 352 396 254 400 352 13 104 0 129 367 398 396 399 354 14 120 0 146 374 399 396 398 352 16 114 0 167 374 396 395 398 354 16 114 0 181 375 397 397 398 354 17 119 0 183 385 398 395 397 354 18 117 0 216 389 394 396 397 358 19 127 0 253 389 395 396 394 351 20 139 0 261 388 397 400 385 353 S3. 139 0 268 389 395 401 384 349 22 126 0 288 S91 396 400 387 343 23 127 0 294 390 394 400 386 326 24 134 0 285 387 398 401 383 303 25 133 0 124 389 395 401 380 303 26 130 0 174 391 397 399 377 303 27 125 0 188 394 398 399 371 304 28 124 0 201 394 396 399 364 304 28 134 0 199 391 398 400 362 300 30 123 0 146 392 396 402 364 300 31 121 - 393 400 363 Second- Run-off in Month foot-days Vfly j iTT'.W Minimum He an acre-feet 3,649 139 71 118 7,240 1,092 122 0 36.4 2,170 0 0 0 0 0 58,320 390 0 160 115,700 0 0 0 0 0 0 0 0 0 0 March...... 0 0 0 0 0 April...... 4,125 E94 0 138 8,180 xnj May...... 10,480 oy4 QQ00 338 20 V90 11,869 399 oy_i_ KQ1 396 23^540 July...... 12,180 402 254 393 24 160 12,083 401 362 390 23*970 10,290 366 300 343 20,410 Water year 1937-3 66,768 402 0 180 130,500 236 CALAVERAS RIVER BASIN Calaveras River at Jenny Lind, Calif. Location.- Water-stage recorder, lat. 38°05', long. 120°52', In SWi sec. 22, T. 3 N., R. 10 E., at bridge on Milton road, a quarter of a mile south of Jenny Lind, and 6-4 miles downstream from Cosgrove Creek. Altitude, about 220 feet. Drainage area.- 395 square miles. Records available.- January 1907 to September 1938. Average discharge.- 29 years (1908-23, 1924-38), 266 second-feet. Extremes.- Maximum discharge during year, 10,600 second-feet Feb. 11 (gage height, 10.40 feet); no flow Oct. 1 to Nov. 16 and during part of Nov. 17. 1907-38: Maximum discharge observed, about 69,600 second-feet Jan. 31, 1911, stage was reported hifher about midnight; no flow during late summer, 1913-15, 1917-22, 1924-38. Remarks.- Records good. Hogan Reseivoir (Stockton flood-control dam) above station regulates flow to some extent; small storage on and diversion from North Fork of Calaveras River into Mokelumne River Basin; also diversion from North Fork of Stanislaus River into Calaveras River above station. Discharge, In second-feet, water year October 1937 to BepteaWr 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 19 56 3,480 1,830 602 400 120 53 16 3.6 f, 0 18 57 2,960 3,180 562 513 113 53 13 2.1 3 0 18 78 4,410 3,880 536 507 108 50 12 1.6 4 0 17 95 4,060 3,440 543 406 103 49 10 1.5 5 0 17 83 3,480 2,950 1,220 364 98 49 10 1.4 a 0 IV 76 2,690 2,100 1,020 332 96 46 9 .8 7 0 16 73 1,440 1,160 752 306 94 41 9 .9 8 0 16 69 654' 899 647 290 88 38 8.5 1.6 9 0 17 68 1,040 767 688 278 83 36 8.6 1.1 10 0 28 62 3,650 663 562 267 79 36 8 1.1 11 0 2,040 58 8,990 626 536 260 79 33 7 1.0 12 0 3,100 66 9,180 2,180 507 249 79 31 7 .8 13 0 2,020 54 7,470 4,820 495 242 79 30 6.5 .6 14 0 544 54 6,750 4,980 466 236 79 29 6 1-7 16 0 211 194 6,670 3,880 433 229 77 26 4.8 1.8 16 0 138 444 4,100 3,380 411 226 73 25 4.8 1.7 17 5 107 310 3,160 3,120 400 223 71 24 4.5 1.2 IB 18 89 328 2,220 2,570 390 216 70 23 4.0 1.1 19 £6 78 270 1,190 1,780 395 207 70 22 3.6 .9 SO 27 71 395 836 1,930 400 194 70 20 3.4 .6 W 28 66 342 689 2,130 395 184 70 17 3.1 .5 (W 26 62 245 6O2 1,640 380 178 70 16 3.8 .6 8,1 26 69 197 536 1,230 359 169 70 16 4.0 8 ?4 25 105 160 486 1,780 365 163 64 14 3.8 1.1 25 26 93 138 455 1,680 507 154 57 JL3 7 .9 2fi 24 78 124 421 1,240 472 148 53 12 8.6 1.2 27 21 71 114 398 1,020 374 142 61 13 10 .8 28 20 66 127 385 912 341 140 60 16 11 2.7 29 20 64 498 850 332 134 50 20 8.5 3.8 30 20 62 575 _ 746 374 131 50 21 6.6 4.S 31 67 1,220 - 660 ~ 126 - 19 4.8 - Second- Month Maximum Run-Off in foot-days Minlmac Mean acre-feet 0 0 0 0 0 9,374 3,100 16 302 18,590 Calendar year 1937...... 125,479.0 7,380 0 344 248,900 6,6BO 1,220 64 214 13,130 81,401 9,180 385 2,907 161,600 63,422 4,080 626 2,046 126,800 1,220 332 512 30,460 lUj...... 7,614 513 126 246 16,100 2,314 12O 50 77.1 4,690 July...... 889 53 12 28.7 1,760 7.31 449 43.8 4.3 .5 1.46 87 Hater year 1937-2 187,570.4 9,180 0 614 372,100 Peak discharge.- Feb. 11 (6-7 p.»-.) 10,600 sec.-ft.| Feb. 14 (3i30 a.m.) 7,470 sec.-ft.i Mar.13 (6 p.m.; 5,490 dec.-ft. CALAVERAS RIVER BASIN 237 Cosgrove Creek near Valley Springs, Calif. Location.- Water-stage recorder, lat. 38°09 r , long. 120°50' > in SEi sec. 35, T. 4 N., R. 10 E., 0.4 mile upstream from mouth, and 2.5 miles south of Valley Springs. Al titude, about 580 feet. Drainage area.- 20.6 square miles. Records available.- October 1929 to September 1938. Extremes.- Maximum discharge during year, 1,740 second-feet Feb. 3 (gage height, 6.63 reet), from rating curve extended above 1,000 second-feet on basis of velocity-area studies; no flow for several months. 1929-38: Maximum discharge, 2,60C second-feet (revised) Feb. 22, 1936 (gage height, 7.80 feet) from rating curve extended above 1,000 second-fe-?t on basis of velocity-area studies; no flow for several months each year. Remarks.- Records good. No diversion. During August and September some unmeasured flow passed the station,which was probably never more than 2 second-feet and resulted from mining operations near Valley Springs using water diverted from Calaveras River. Rating table, water year 1937-38 (gage height, in feet, and discharge, in second-feet) 1.8 0.0 3.3 103 £.0 .2 3.6 165 2.2 1.7 3.9 242 2.4 7.7 4.2 338 2.6 17 4.6 510 2.8 31 5.0 705 3.0 55 5.4 930 Discharge, In second-feet, water year October 1937 to September Day Oet. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0.3 318 66 7.6 4.4 0.2 2 0 1.9 161 553 7 3.8 .2 3 0 4.1 398 103 6 2.9 .£ 4 0 1.9 240 48 10 2.6 .2 5 0 1.2 59 31 22 1.9 .£ 6 0 1.0 £9 ££ 9.5 1.5 .2 7 0 .9 19 19 7.5 1.4 .2 8 0 .7 18 18 6 1.2 .1 9 0 .6 136 16 6.6 1.1 .1 10 .1 .5 446 13 6 1.0 0 11 70 .6 879 23 4.8 .8 0 12 55 .6 16£ £96 4.4 .7 0 13 9 .5 69 224 4.4 .6 0 14 3.2 .6 £07 55 4.1 .5 0 15 1.6 47 65 £9 3.8 .5 0 16 .9 12 31 117 3.8 .6 0 17 .6 17 22 62 3.5 .5 0 18 .5 11 28 28 3.5 -:;- . 5 0 19 .4 12 £1 22 3.2 *.4 0 20 .3 19 16 141 2.9 .4 0 21 .3 8 14 36 2.7 .3 0 22 .3 6.5 13 22 2.5 .3 0 23 2.5 3.8 12 £3 2.5 .3 0 24 1.7 £.9 10 78 2.9 .3 0 25 .8 £.5 8.6 22 6.6 .3 0 26 .5 2.3 7.6 16 3.2 .2 0 27 .5 1.9 7 14 £.7 .2 0 28 .4 17 6.6 12 £..5 .2 0 29 .3 144 . 11 2.9 .2 0 50 .3 22 * 9.6 4.4 .2 0 31 .3 283 _ 8.5 _ .2 _ Second- Run-off In Month foot-days Mazl*» Mlnlaruja Mean acre-feet 0 0 0 0 0 0 0 0 0 0 149.4 70 0 4.82 296 6,353.6 646 0 14.7 10,610 626.0 283 .3 20.2 1,240 3,389.5 879 6.5 121 6,720 March...... 2,136.0 553 8.6 68.9 4,240 April...... 166.2 22 2.6 6.21 310 29.8 4.4 .2 .96 59 1.6 .2 0 .06 3.2 July...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Water year 1937-3 3 ...... 6,488.5 879 0 17.8 12,870 Faak discharge.- Pat. 3 (I2s30 a.a.) 1,740 aeo.-ft.; Pea. 10 (3|30 p.m.) 1,430 see.-ft.> Feb. 11, (liSO p.m.) 1,360 see.-ft. Qage height missings discharge interpolated. 238 MOKELUMNE RIVER BASIN Salt Springs Reservoir near West Point, Calif. Location.- Staff gage, lat. 38°30', long. 120°12', in SEi sec. 53, T. 8 N., R. 16 E., at Salt Springs Dam on North Fork of Mokelumne River, 2 miles upstream from Cold Creek, and 18 miles northeast of West Point. Zero of gage is 3,700 feet above mean sea level. Drainage area.- 160 square miles. Records available.- March 1931 to September 1938. Remarks.- This is largest storage unit on Ilokelumne system of Pacific Gas & Electric Co. Elevation of crest of dam, 3,958.5 feet and spillway, 3,947.0 feet above mean sea level respectively. Water is released through power house just below dam and dis charged into Tiger Creek conduit. Table of daily contents, furnished by Pacific Gas & Electric Co., shows amount available for release. Contents, in acre-feet, water year October 1937 to September 1938 Day Oct. Hov. Dec. Jan. Feb. Mar. Apr, May June July Aug. Sept. 1 70,204 43,34V 26,119 V4,6V2 6?, 820 50,595 39,861 8,436 80,009 130,475 126,395 111,743 2 69,266 42,392 25,486 V4.080 63,680 51,148 38,354 8,714 83,623 130, 568 125,567 111,21V 3 68,835 41,448 25,351 V3,V10 63,541 51,2V2 3V, 083 9,055 87,143 130,475 124.650 110,604 4 68,191 40,568 25,038 V2,900 63,195 51,025 35,829 9,084 92,174 130,382 123,736 110,343 5 6V, 335 39,590 24,592 V2,241 62,919 50,V18 35,10V 9,460 96,169 130,102 122,642 110,343 6 66,484 39,158 24,106 VI, 65V 62,574 50,289 33,682 9,873 98,652 130,009 121,915 109, V32 7 65,42V 38,V82 23,668 V0,929 62, 161 49,862 32,333 9,903 100,826 129,915 121,553 108, VV5 8 64,V26 38,141 23,233 V0,204 61, 339 49,3VV 31,10V 10,204 102,344 129,915 120,648 107,822 9 63,889 3V, 399 22,802 69,482 60,V26 48,895 28,009 11,480 103,787 129,882 119,746 106,872 10 62,988 36,663 29,948 68,V63 60,184 48,354 24,948 13,225 104,554 129,729 118,846 106,098 11 62,092 36,245 62,849 6V,9V6 59,914 4V,8V6 21,993 15,862 105,068 129,542 118,128 105,582 12 61,06V 35,623 76,384 6V,193 59,309 48, 354 19,288 18,971 105,068 129,078 117,323 104,726 IS 60,049 35,313 79,020 66,413 58,50V 49, 559 16,114 23,930 104,128 128, V99 116,519 103,787 14 59,108 35,005 V9,933 65,990 57,VV8 49,559 12.V8V 31,10V 105,410 128,935 115,985 102,767 15 58,108 34,340 80,VV2 66,201 5V, 185 49,3VV 9,933 38,248 108,168 129,264 115,363 101,668 16 5V, 185 33,V83 81,078 66,342 56,530 49,196 V,36V 44, 888 112,358 129, V29 114, 476 100,658 17 56,400 33,230 81,232 66,413 55,816 49,OV5 6,340 49,31V 116,698 129,822 113,503 99,653 18 55,428 32,V80 81,232 66,342 55,300 48,VV4 8,299 52,015 120,016 129,542 112, 534 98,902 19 54,46V 32,433 81,232 66,201 54,V22 48,294 9,285 53,014 122,824 129, 1V1 112,006 98,153 20 53,OV6 31,V91 80,849 65,919 54,148 48,534 8,299 53,264 124,467 128, 985 112,358 97,076 21 52,263 31,644 80,466 65,778 53,5V8 48,354 8.162 52,V01 127,225 128,613 112,886 95,923 22 51,333 31,10V 80,009 65,V08 53,014 48,055 8,027 52,888 130,195 128,150 113,062 94,857 23 50,411 30,429 V9,628 65,708 52,5V6 4V, 69V 8,21V 54,531 130, 568 12V, 8V2 113,238 94,041 24 49,680 29,614 V9,096 65,56V 52,OVV 4V, 568 8,326 56,V26 130,568 128,150 113,238 93,227 25 48,834 29,280 V8,V1V 65,286 51,828 4V, 223 V,V60 59,V12 130,849 128,150 113,238 92,740 26 4V, 81V 28,901 V8,264 64,935 51,395 46,868 8,02V 62,230 130,756 12V,VV9 113,238 92,174 27 46, 868 28,243 VV,V35 64, 516 51,025 46, 516 8,492 66,342 130,568 127,686 113,238 91,368 28 45,V56 27,776 VV,059 64,23V 50,595 46, 106 8,054 69,194 130,568 127, 502 113,327 90,725 29 45,1V6 2V,1V3 76,459 64,16V _ 44, 888 8,VV1 VI, 292 130,756 127,132 113,150 90,164 SO 44,314 26,66V V5,V8V 64,23V . 43.1VS 8,856 V3,268 130,662 126,763 112,798 89 s 684 31 44,028 - V5,266 63,889 - 41, 503 76,011 126,671 112,358 - MOKELUMNE RIVER BASIN 239 North Fork of Mokelumne River below Salt Springs Dam, Calif. Location.- Water-stage recorder, lat. 38°29', long. 120°13', in SWi sec. 33, T. 8 N., R. 16 ~E., 0.3 mile downstream from Salt Springs Dam and 1.7 miles upstream from Cold Creek. Altitude, about 3,600 feet. Drainage area.- 160 square miles. Records available.- September 1926 to September 1938. Average discharge.- 11 years (1927-38), 248 second-feet. Extremes.- Maximum discharge during year, 3,240 second-feet June 9 (gage height, 7.60 feet);" minimum, 2.3 second-feet Dec. 8. 1926-38: Maximum discharge, 8,740 second-feet Mar. 25, 1928 (gage height, 13.62 feet), from rating curve extended above 4,000 second-feet; minimum, 0.2 second-foot Mar. 31, 1931. Discharge, In second-feet, water year October 1937 to September 1938 Day Oot. HOT. Dee. Jan. F»b. Mar. Apr. May June July Aug. Sept. 1 8 4.1 2.5 374 125 313 925 1,010 2,040 1,430 72 15 2 7.6 4.1 2.5 386 197 302 925 675 2,040 1,230 78 29 3 7.5 4.0 124 278 296 948 674 2,170 1,130 68 13 4 7 4.0 2.6 42 338 286 970 764 2,100 1,040 79 12 e 7 3.8 2.5 32 332 313 1,020 730 2,520 860 76 12 6 7 3.8 2.5 46 386 377 1,020 950 2,870 570 17 93 7 7 3.6 2.5 126 237 304 1,020 1,110 3,010 530 16 93 3 7 3.6 2.3 120 332 283 1,260 1,110 3,080 464 64 89 9 6.5 3.6 2.6 120 313 286 2,040 1,110 3,080 224 77 13 10 6.5 3.6 .8.5 62 278 273 2,100 1,110 3,010 271 70 13 11 6.5 3.6 26 33 267 £96 2,040 1,110 2,800 72 24 12 12 6.5 3.4 15 31 291 395 2,040 1,110 2,590 76 63 81 IS 6.5 3.2 316 11 286 392 1,980 1,130 1,920 35 15 83 14 6 3.2 360 3.4 288 392 1,980 1,110 1,380 46 14 83 16 6 3.1 346 6 286 392 1,860 1,110 1,070 30 73 82 16 6 3.1 401 5 288 392 1,800 1,200 730 42 86 81 17 5.5 3.4 372 5 288 389 929 1,740 570 132 85 12 18 5.5 2.9 425 4.5 291 389 762 2,040 478 118 83 12 19 5.5 2.7 425 4.3 291 386 2,080 2,040 360 55 33 58 20 5 2.9 S30 4.1 291 389 2,450 2,040 222 91 13 71 21 5 2.7 220 4.0 288 392 2,100 1,980 125 99 13 64 22 4.8 2.7 205 4.0 280 392 2,240 1,860 716 236 58 56 23 4.8 2.7 318 4.1 286 392 1,790 1,860 1,980 17 66 12 24 4.5 2.7 455 3.6 280 395 1,910 2,040 2,100 16 42 11 25 4.5 2.7 410 17 307 392 1,570 2,040 2,100 59 28 10 26 4.5 2.7 410 71 293 389 672 2,040 1,980 53 26 31 27 4.5 2.7 291 105 338 389 1,100 2,040 1,980 86 13 10 28 4.3 2.6 313 88 398 587 1,320 2,100 1,680 58 13 9.5 29 4.1 2.5 318 102 925 1,110 2,040 1,860 60 92 9 50 4.1 2.5 267 30 925 1,110 2,040 1,920 17 73 11 31 4.1 242 29 948 2,100 17 61 Second- Run-Off in Month foot-dsys Maximum Minimum Mean ao re-feet Oct 179.2 8 4.1 5.78 355 Son 96.2 4.1 2.5 3.21 191 Dec ember...... 6,396.1 455 2.3 206 12,690 0 alendar year 19' 7...... 79,227.3 2,380 1.3 217 157,100 Jan 1,99V. 0 386 3.4 64.4 3,960 Pel 8,153 398 125 291 16,170 Mar 12,911 948 273 416 25,610 Apr 11...... 45,071 2,450 672 1,502 89,400 Maj 46,013 2,100 674 1,484 91,270 Jun 54,481 3,080 125 1,816 108,100 Jul 9,164 1,430 16 296 18,180 Aug 1,591 92 13 51.3 3,160 Sep 1,180.5 93 9 39.4 2,340 « ater year 1937-2 8...... 187,233.0 3,080 2.3 513 371,400 240 MOKELUMNE RIVER BASI1I Mokelumne River near Mokelumne Hill, Calif. Location.- Water-stage recorder, lat. 38°18<40", long. 120°43'10", in sec; I, T. 5 N., R. 11 E., at highway bridge, 1.2 miles northwest of Mokelumne Hill, and 8 miles down stream from confluence of North and South Forks. Altitude, about 650 feet. Drainage area.- 538 square miles. Records available.- November 1927 to September 1938. Average discharge.- 10 years (1928-38), 800 second-feet. Extremes.- Maximum discharge during year, 17,700 second-fep-t Dec. 11 (gage height, 15.25 feet); minimum, 96 second-feet Nov. 14. 1927-38: Maximum discharge, 23,300 second-feet Mar. 25, 1928 (gage height, 16.10 feet), from rating curve extended above 10,200 second-feet on basis of velocity-area studies; minimum, 14 second-feet Oct. 27, 1929. Remarks.- Records excellent. Flow regulated by diversions, three power plants, and > several storage reservoirs above station. See record for Salt Springs Reservoir. Discharge, in second-feet, water year October 1937 to September 1938 Day oot. HOT. Dec. Jan. Feb. Har. Apr. May June July Aug. Sept. 1 536 278 367 597 1,360 2,270 2,380 3,020 4,600 2,320 337 625 2 480 398 327 557 1,240 4,260 2,320 2,960 4,880 1,870 610 536 3 432 507 305 760 2,190 3,670 2,270 2,440 4,880 1,600 688 463 4 466 498 246 760 1,660 2,600 2,780 2,600 5,020 1,560 704 384 e 526 462 130 732 1,280 2,120 3,560 2,490 5,170 1,480 666 237 6 512 337 213 678 1,100 1,740 2,960 2,720 5,470 1,240 620 297 7 512 154 270 634 1,060 1,740 2,840 3,080 5,620 1,S10 252 595 S 489 290 315 624 1, 030 1,640 2,780 3,080 5,320 1,140 470 660 9 466 370 297 547 1,410 1,520 3,690 3,560 5,320 1,140 640 655 10 427 390 2.1TO 645 3,610 1,480 3,690 3,820 5,170 885 575 610 11 494 386 11,200 639 5,960 1,480 3,820 3,950 4,600 944 555 369 12 522 334 2,770 645 2,710 3,370 3,950 4,080 4,080 885 555 412 13 480 203 1,400 645 1,800 6,260 3,820 4,960 3,560 915 490 620 14 498 181 1,130 517 2,150 3,820 3,560 5,500 2,840 578 332 671 15 540 297 1,060 639 1,740 3,080 3,440 5,170 2,960 605 437 635 16 594 444 1,030 430 1,400 3,080 3,440 5,170 2,380 334 555 605 17 419 531 842 617 1,240 2,900 2,900 5,170 2,020 409 635 580 18 480 507 815 613 1,210 2,490 2,600 5,320 1,640 668 600 400 19 536 394 705 645 1,210 2,220 4,340 4,880 1,480 798 625 400 20 540 406 732 624 1,110 3,870 5,170 4,210 1,360 650 508 560 21 545 326 732 557 1,180 3,200 4,880 4,080 1,230 663 404 676 22 536 398 760 537 1,080 2,720 5,020 3,950 1,360 560 458 555 23 540 540 788 405 1,180 2,540 4,600 4,470 3,070 559 550 570 24 363 570 732 492 1,110 3,080 4,470 4,880 3,440 £51 600 517 25 489 402 672 470 1,140 2,600 4,600 5,020 3,140 £64 610 284 26 550 272 613 547 1,140 2,320 3,270 4.880 2,840 6£0 575 307 27 503 398 639 645 1,010 2,220 2,880 5,320 2,840 550 467 505 28 449 326 694 678 1,140 2,220 3,560 5,020 2,440 620 373 476 29 410 355 683 678 2,600 3,440 4,600 2,490 560 512 369 50 466 392 661 547 2,540 3,200 4,470 3,140 454 585 433 31 256 694 787 2,380 4,600 302 640 Second- Run-off in Month foot -days Maximum Minimal Mean ao re-feet Oot 15.056 594 £56 486 29,860 Hoi 11,346 570 154 378 22,600 Dec 33,992 11,200 130 1,097 67,420 C alendar year 193 370,859 11,200 121 1,016 735,600 lax 18,891 787 405 609 37,470 fat 45,450 5,960 1,010 1,623 90,150 Max 84,030 6,260 1,480 2,711 166,700 Apr 106,230 5,170 S,£70 3,541 210,700 *«J 129,470 5,500 S.440 4,176 £56,800 Jun 104,360 6,620 1,230 3,479 207,000 Ju3 26,334 2,320 251 859 52,830 Aug 16,628 704 252 536 32,980 B«S 15,004 676 £37 500 29,760 1 ater year 1957-58..,,...... ,.,,..,,.. 607,091 11,200 130 1,663 1,204,000 Peak aiaeharge.- Dec. 11 (Ili20 a.m.) 17,700 see.-ft.J Feb. 11 (12l30 p.m.) 7,020 seo--ft.j Har. i& \* a.jaTj 7,980 sec.-ft. MOKELUMNE RIVER BASIN 241 Mokelumne River at Lancha Plana, Calif. Location.- Water-stage recorder, lat. 38°13'25", long. 120°53'20", In SWi sec. 4, T. 4 N., R. 10 E. f 1 mile east of Lancha Plana, 3 miles downstream from Pardee Dam, and 5 miles upstream from camanche Creek. Zero of gage is 158.95 feet above mean sea level (benchmark of East Bay Municipal Utility District). Drainage area.- 584 square miles. Records available.- June 1926 to September 1938. Extremes.- Maximum discharge during year, 4,970 second-feet Feb. 11 (gage height, 8.43 feet); minimum 58 second-feet (regulated) Aug. 17. 1926-38: Maximum discharge, 27,300 second-feet second-feet (unregulated) Mar. 25, 1928 (gage height, 19.65 feet), from rating curve extended above 15,500 second-feet on basis of velocity-area studies; minimum, 5.5 second-feet Nov. 21, 1929. Remarks ._- Records excellent. Flow regulated by Pardee and Salt Springs Reservoirs- Several smaller reservoirs, four hydroelectric plants, and several diversions are above station. East Bay Municipal Utility District aqueduct is largest diversion. Discharge, In second-feet, water year October 1937 to September 1938 __.,. Day Dot. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 56B 583 578 641 656 1,990 2,510 3,280 4,290 2,630 647 647 2 556 565 569 646 660 2,400 E,500 3,290 3,900 1,490 688 688 5 445 560 569 641 744 2,410 2,630 3,080 5,680 482 638 692 4 678 560 660 646 651 2,380 2,620 2,530 3,800 864 634 434 5 643 665 457 646 807 2,370 2,610 2,520 5,900 1,210 513 461 6 543 543 574 641 951 2,370 2,610 2,540 4,080 1.S70 453 660 7 638 464 566 641 946 2,390 2,520 2,540 4,190 1,180 434 611 8 634 574 647 641 969 2,400 2,520 2,560 4,200 1,160 666 597 9 660 574 666 641 976 2,400 2,630 3,000 4,210 1,100 616 547 10 453 692 574 641 1,220 2,400 2,540 3,620 4,040 868 611 449 11 551 487 705 641 3,670 2,410 2 860 3,900 3,640 768 621 472 12 538 574 2,000 641 4,460 2,520 3,210 3,380 2,990 802 517 492 13 534 683 2,110 641'641 4,560 2,460 3,200 4,080 2,120 807 434 547 14 529 468 2,110 4,280 2,450 3,720 4,630 1,330 719 434 621 16 634 678 2,110 651 3,860 2,440 3,960 4,700 592 643 513 621 16 543 592 1,210 641 3,720 2,460 3,820 4,850 560 526 526 688 17 457 697 641 646 3,720 2,460 3,810 4,760 656 445 462 438 18 543 692 661 641 3,260 2,660 3,940 4,830 777 517 613 438 19 666 588 656 646 2,870 3,730 3,940 4,820 1,370 618 613 629 20 666 665 646 648 2,860 3,930 3,950 4,620 1,370 506 434 517 21 556 464 636 631 2,850 3,900 3,960 4,230 946 510 434 526 22 551 692 631 646 2,850 3,910 3,970 5,620 1,460 509 613 521 23 566 602 631 641 2,850 4,120 4,200 3,710 2,240 525 613 629 24 438 669 641 646 2,860 4,400 4,280 4,070 3,360 431 513 634 25 560 669 636 646 1,940 4,410 4,390 4,800 3,320 493 513 445 26 538 566 641 646 1,940 4,240 4,380 4,730 3,030 512 513 666 27 561 560 641 646 2,030 4,240 4,110 4,860 2,560 608 521 666 28 547 464 646 661 1,990 4,310 3,940 4,8'60 2,210 626 434 556 29 543 651 641 661 _ 3,920 3,950 4,620 2,340 505 613 543 SO 617 674 641 646 _ 2,660 3,580 4,130 2,840 484 613 500 31 476 - 641 687 - 2,600 " 4,160 476 621 Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet October...... 16,489 578 438 532 32,710 Noreiiber...... 16,706 60E 464 667 33.130 25,424 2,110 467 820 60,430 338,342 2,910 286 927 671,100 20,007 687 631 646 39,680 February...... 64,628 4,560 650 2,306 128,000 March, ...... 93,630 4,410 1,990 3,020 185,700 April...... 102,350 4,390 2,600 3,412 203,000 Ifcy...... 121,790 4,850 2,520 3,929 241,600 79,890 4.290 556 2,663 158,500 July...... 23,963 2,630 431 773 47.5SO 15,757 616 434 508 31,250 16,914 621 434 5SO 31,560 Water year 1937-38...... 696,447 4,850 431 1,634 1,183,000! 242 MOKELUMNE RIVER BASIN Mokelumne River near Clements, Calif. Location.- Water-stage recorder, lat. 38°12'25", long. 121°05'20", in WWi sec. 15, T. 4 H., R. 8 E., 700 feet upstream from highway bridge, 1 mile north of Clements, and 3 miles downstream from Murphy Creek. Altitude, about 80 feet. Drainage area.- 630 square miles. Records available.- October 1904 to September 1938. Average discharge.- 24 years (1904-23), 1,110 second-feet. Storage and diversion by East Bay Municipal Utility District began March 1929. Extremes.- Maximum discharge during year, 5,700 second-feet Feb. 11 (gage height, 11.72 feet); minimum, 221 second-feet Aug. 17. 1904-38: Maximum discharge, 25,600 second-feet Mar. 25, 1928 (gage height, 22.45 feet at station below bridge), from rating curve extended above 4,60Q second-feet and verified by comparison with records for Mokelurane River at Lancha Plana; no flow July 9, Aug. 15, 20-23, 1924. Remarks.- Records excellent except those for periods of missing gage heights, Oct. 4-6, 16, 17 and Nov. 3-5, which were computed on basis of records for station at Lancha Plana and are fair. Flow regulated by diversions and storage above station. See Mokelurane River at Lancha Plana. Discharge, IB second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec, Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 559 555 572 642 1,160 2,110 2,580 3,350 4,340 2,730 523 540 2 567 551 589 659 VOO 2,920 2,560 3,420 3,870 1,840 600 596 3 483 545 576 650 1,4VO 2,680 2,700 3,330 3,730 557 552 617 4 525 545 580 646 971 2,540 2,590 2,640 3,700 654 544 482 6 546 555 480 642 86V 2,500 2,580 2,590 3,870 1,140 527 437 6 546 559 538 642 1,030 2,500 2,5VO 2,590 3,990 1,460 459 548 7 542 472 56V 642 982 2,480 2,570 2,570 4,180 1,200 447 626 B 542 525 572 642 998 2,490 2,590 2,570 4,190 1,180 515 626 9 550 563 5V2 642 1,120 2,480 2,610 2,840 4,180 1,120 626 557 10 492 589 606 642 1,470 2,460 2,630 3,550 4,080 945 626 4V4 11 525 500 820 642 4,410 2,520 2,790 3,910 3,710 750 535 46V 12 550 567 1,920 637 4,750 2,880 3,240 3,900 3,120 811 523 490 13 546 5V6 2,180 63V 4,620 2,720 3,240 3,980 2,220 821 459 515 14 53V 504 2,220 637 4,690 2,550 3,590 4,620 1,520 787 437 626 16 546 530 2,200 715 4,020 2,500 4,040 4,760 704 565 494 630 16 534 593 1,570 655 3,770 2,590 3,950 4,820 580 540 527 635 17 488 602 650 682 3,780 2,550 3,880 4,810 567 486 470 451 IB 534 593 642 664 3,560 2,570 3,940 4,790 642 494 519 437 19 546 593 642 664 2,940 3,620 3,960 4,850 1,350 517 519 502 20 559 5V6 642 616 2,910 4,040 3,960 4,730 1,380 510 459 535 21 551 492 637 637 2,890 4,010 3,960 4,390 1,040 512 433 523 22 551 538 642 642 2,880 4,010 3,980 3,710 1,280 512 490 535 23 546 602 646 63V 2,880 4,100 4,130 3,610 2,020 540 519 527 24 440 602 646 642 2,490 4,680 4,340 3,960 3,160 474 535 544 25 51V 551 642 646 1,960 4,520 4,380 4,750 3,360 460 523 474 26 555 567 637 646 1,950 4,400 4,360 4,750 3,110 512 527 510 27 542 555 642 646 2,000 4,320 4,200 4,820 2,590 504 531 565 28 551 484 646 677 1,970 4,340 3,900 4>86O 2,250 528 467 565 29 538 525 63V 715 4,230 3,930 4,710 2,230 501 490 561 30 530 567 63V 664 2,900 3,V90 4,270 2,720 490 523 527 31 452 642 971 2,580 4,030 498 519 Second- ifa^iTirvpo Run-off In Month foot-days Minimum Mean acre-feet Dot 16,490 567 440 532 32,710 No? 16,576 602 472 553 32,880 Dec 26,192 2,220 480 845 51,950 0alendar year 1937 ...... 347,158 2,920 270 951 688,600 Jan 20,521 971 616 662 40,, 700 Pet 69,238 4,750 700 2,473 137,300 Mar 97,790 4,680 2,110 3,155 194,000 Apr 103,540 4,380 2,560 3,451 205,400 May 122,480 4,860 2,570 3,951 242,900 JlIE 79,673 4*340 567 2,656 158,000 Jill 24,638 2,730 460 795 48, 870 Aug 15,918 626 433 513 31,570 Sop 16,122 635 437 537 31,980 11ater year 1937-38...... 609,178 4,860 433 1,669 1,208,000 MOKELUMNE RIVER BASIN 243 Mokelumne River at Woodbrldge, Calif. Location.- Water-stage recorder, lat. 38°09'30", long. 121°18'10", In NEi sec. 34, T. 4 N., R. 6 E., three-eighths of a mile downstream from dam of Woodbrldge Irrigation District at Woodbrldge. Altitude, about 30 feet. Drainage area.- 644 square miles. Records available.- May 1924 to September 1938 (1924 and 1925, low-water records only). Average discharge.- 11 years (1926-27, 1928-38), 639 second-feet. Extremes.- Maximum discharge during year, 4,640 second-feet Feb. 15 (gage height, 21.95 reet); minimum, 81 second-feet June 18. 1924-38: Maximum gage height, 26.58 feet, former datum, about 30.6 feet, present datum, Mar. 26, 1928 (discharge not determined); minimum discharge, 0.9 second-foot Sept. 3, 1924. Remarks.- Records excellent except those for days of missing gage heights, Jan. 1, 2, which were computed on basis of records for station near Clements and are good. Flow regulated by storage, power plants, and many diversions above station. See records for Woodbrldge Canal and Mokelumne River at Lancha Plana. Discharge, In second-feet, water year October 1937 to September 1938 Day Got. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 343 401 591 666 1,140 1,980 2,670 3,680 3,710 2,260 223 281 2 424 491 690 673 793 2,130 2,610 3,300 3,890 2,260 252 307 3, 404 486 584 676 1,170 2,620 2,490 3,310 3,620 1,260 254 344 4 304 471 596 669 1,040 2,640 2,520 3,120 3,440 378 212 348 6 484 471 578 666 915 2,610 2,520 2,360 3,440 769 206 236 6 433 458 487 666 978 2,460 2,490 2,370 3,530 936 164 238 7 .380 448 572 664 986 2,440 2,500 2,330 3,640 947 148 332 8 376 368 586 664 962 2,420 2,620 2,320 3,780 864 143 361 9 380 428 684 662 1,000 2,410 2,540 2,200 3,830 808 216 332 10 401 468 614 660 1,060 2,420 2,530 2,540 3,820 772 317 318 11 317 493 691 660 1,760 2,460 2,620 3,120 3,720 547 268 255 12 382 439 1,040 658 3,130 2,490 2,670 3,450 3,400 502 246 271 13 389 906 1,700 668 4,240 2,710 3,010 3,490 2,730 506 242 276 14 384 626 1,840 656 4,480 2,670 3,120 3,670 1,920 487 195 316 16 397 507 1,930 684 4,440 2,560 3,400 4,130 1,060 379 181 376 16 403 596 1,970 690 4,000 2,530 3,800 4,270 585 249 220 372 17 408 633 1,160 679 3,750 2,550 3,810 4,360 939 274 241 338 18 326 628 795 681 3,710 2,620 3,760 4,270 100 217 200 249 19 379 622 743 676 3,480 2,590 3,790 4,340 778 210 240 222 20 448 608 721 671 2,980 3,230 3,880 4,420 1,030 229 260 283 21 430 593 700 641 2,860 3,790 3,820 4,270 942 210 226 298 22 453 480 683 654 2,800 3,820 3,870 4,020 692 196 205 310 23 439 601 683 660 2,780 3,820 3,870 3,430 1,140 391 249 310 24 439 612 679 656 2,770 3,980 4,020 3,390 1,640 310 262 325 25 343 588 675 656 2,420 4,320 4,120 3,750 2,400 160 265 332 26 440 696 671 656 2,040 4,300 4,040 4,310 2,840 174 260 260 27 442 663 664 654 1,960 4,240 4,080 4,350 2,670 204 270 394 28 448 663 669 660 1,940 4,180 3,990 4,450 2,270 200 276 400 28 436 485 671 698 4,180 3,780 4,440 1,930 214 199 400 30 449 661 664 688 _ 4,010 3,790 4,270 1,930 204 262 442 31 428 - 660 732 - 3,030 - 3,860 - 249 354 - Second- Run-off In Month foot-days Haxluom Minimum Mean acre-feet 12,507 484 304 403 24,810 16,177 906 368 539 52,090 25,79O 1,970 487 832 51,150 Calendar year 1937...... 295,485 2,500 106 810 586,100 20,732 732 641 669 41,120 65,654 4,480 793 2,341 130,000 March...... 93,990 4,320 1,980 3,032 186,400 April...... 98,330 4,120 2,490 3,278 195,000 Bay...... 111,580 4,450 2,200 3J599 221,300 71,416 3,890 100 2,381 141,700 July...... 17,366 2,260 160 560 34,440 7,266 354 143 234 14,390 9,526 442 222 318 18,890 Water year 1937-2 8...... 650,224 4,480 100 1,507 1,091,000 MOKELUME RIVER BASIN Tiger Creek power-house conduit below Salt Springs Dam, Calif. Location.- Water-stage recorder and concrete control, lat. 38°30', long. 120°13', in SWi sec. 35, T. 8 N., R. 16 E., 1,000 feet downstream from Salt Springs Dam and power House. Altitude, about 3,700 feet. Records available.- June 1931 to September 1938. Extremes.- Maximum daily discharge during year, 558 second-feet July 11; no flow Apr. 28 to June 17. 1931-38: Maximum daily discharge, that of July 11, 1938; no flow at tines In each year. Remarks.- Records good. Conduit conveys water of North Fork of Mokelumne River from tail- race of Salt Springs power house to forebay of Tiger Creek power house, picking up water from Bear River and several small creeks en route. Gage-height record and results of two discharge measurements furnished by Pacific Gas & Electric Co. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Har. Apr. *ay June July Aug. Sept. 1 433 430 297 60 203 182 10S 0 167 377 483 2 433 475 288 46 233 204 102 0 179 470 445 S 210 474 177 354 205 204 102 0 10 506 433 4 411 475 176 474 152 204 67 0 21 608 223 5 461 414 177 476 155 169 25 0 205 476 158 6 454 175 265 462 100 100 25 0 311 327 456 7 3VV 177 243 382 241 178 26 0 319 289 512 8 422 390 249 384 166 202 26 0 361 482 511 9 481 371 246 384 185 202 26 0 636 430 611 10 410 370 34 448 220 218 26 0 409 392 479 11 488 177 .9 480 234 186 26 0 568 394 308 12 512 319 129 482 201 98 26 0 654 412 477 13 499 177 182 419 204 98 22 0 437 430 614 14 504 154 173 314 204 98 14 0 282 194 514 15 498 371 177 145 204 99 14 0 218 388 517 16 502 359 89 86 204 99 14 0 291 433 518 17 410 320 113 286 204 99 14 0 167 442 485 18 505 306 3.0 274 204 100 15 45 461 440 311 19 611 361 2.6 289 204 100 16 122 438 443 477 20 510 312 258 288 204 100 16 143 362 439 516 21 606 244 269 284 204 100 15 119 408 306 517 22 616 399 281 149 204 100 16 105 276 446 483 23 517 430 163 149 204 100 16 102 210 446 450 24 343 367 40 296 212 100 16 100 44 480 429 25 492 262 15 296 179 100 16 96 299 480 201 26 496 218 15 292 193 100 16 96 330 446 426 27 486 360 194 251 146 100 8.5 71 262 443 424 28 414 260 196 190 82 100 0 66 331 308 342 29 444 331 187 68 _ 101 0 74 345 459 368 50 363 292 249 191 . 101 0 92 341 GOO 370 31 140 - 207 276 - 102 - - 52 512 Second- MftyjuTOBi Minimum Mean Run-off In Month foot-days acre-feet October...... 13,728 617 140 443 27,230 November ...... 9,740 476 154 325 19,320 6,094.6 297 .9 164 10,100 Calendar year 1937...... 86,702.3 535 0 235 170,000 8,964 482 46 289 17,780 6,350 241 82 191 10,610 March, ..,,.,...... ,.,....,....,...... , 4,044 218 98 130 8,020 April...... 806.5 102 0 26.8 1,600 May...... 0 0 0 0 0 1,220 143 0 40,7 2,420 July...... 9,143 658 10 S95 IS, 130 13,096 612 194 422 25,980 12,868 618 158 429 25,500 Wet»r year 1937 -; 8...... 84,043.0 568 0 230 166,700 MOKELUMNE RIVER BASIN Cold Creek near Mokelumne Peak, Calif. Location.- Water-stage recorder, lat. 38°3l', long. 120°13', in sec. 28, T. 8 N., R. 16 E., 2.4 miles upstream from mouth and 6 miles southwest of Mokelumne Peak. Altitude, about 6,000 feet. Drainage area.- 23 square miles. Records available.- July 1927 to September 1938. Average discharge.- 11 years, 55.2 second-feet. Extremes.- Maximum discharge during year, 4,100 second-feet Dec. 11 (gage height, 8.98 feet).from rating curve extended above 1,000 second-feet on "basis of velocity-area and A/Tstudies; minimum, 0.2 second-foot on many days in October and llovember. 1927-38: Maximum discharge, that of Dec. 11, 1937; practically no flow Aug. 17 to Oct. 7, 1931. Remarks.- Records fair. Discharge for periods of ice effect, Dec. 1-9, 22-31, Jan. 4^77 Jan. 20 to Mar. 7, computed on basis of weather records and records of nearby streams. Ho storage or diversion. Gage-height record and results of discharge measurements furnished by Pacific "Jas & Electric Co. Rating table, water year 193V-38 (gage height, in feet, and discharge, in second-feet) 0.2 0.0 1.6 23 4.0 396 .4 .2 1.8 35 4.5 585 .6 .6 2.0 49 5.0 875 .8 2.0 2.4 84 5.5 1,210 1.0 4.6 2.8 132 6.0 1,560 1.2 8.5 3.2 200 6.5 1,930 1.4 14 3.6 288 7.2 2,490 Discharge, In second-feet, water year October 1957 to September 1958 Day Dot. HOT. Don. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.2 0.2 3.5 18 20 38 121 690 117 *7 0 .6 2 .a .2 3.5 21 40 51 113 558 102 *6 .6 3 .6 .2 3.6 19 35 74 97 625 85 »5 .6 4 .4 .2 3 17 35 91 131 696 70 *4 .6 6 .3 .2 3 16 30 68 159 576 62 *3 ».6 6 .2 .2 3 15 28 55 ISO 662 58 *2 .6 7 .2 .2 3 15 28 50 200 640 53 1.5 .6 8 .2 .2 3 15 28 58 260 504 47 1.3 .6 9 .2 .3 3 14 27 88 330 435 40 1.2 .6 10 .2 .5 3.610 14 27 110 384 409 33 1.0 .6 11 .2 .2 2,440 14 27 124 412 30V 26 1.0 .5 12 .2 .3 254 14 63 124 532 229 22 1.0 .5 13 .2 .3 110 14 74 91 720 260 20 .9 .5 14 .4 .3 73 14 49 77 768 330 17 .8 .5 16 .6 .4 62 21 38 97 690 349 16 .8 .5 16 .4 .4 46 35 37 128 605 322 15 .8 .5 17 .3 2.6 43 29 35 156 554 260 14 .8 .5 18 .3 .8 38 28 32 315 456 210 *13 .8 .5 19 .3 .8 30 30 31 330 346 166 »14 .8 .5 20 .3 51 23 28 41 300 288 142 »13 .7 .5 2V .3 19 22 26 36 328 298 231 *13 .7 .4 22 .2 9.5 20 24 33 333 406 218 »12 .6 .4 25 .2 6.5 20 22 31 317 616 242 *12 .6 .4 24 .2 7 20 20 30 276 554 224 4*12 .6 .4 25 .2 7 20 18 SO 180 544 194 *11 .6 .4 26 .2 6 19 16 30 140 610 176 19 .6 .4 27 .2 6 19 14 31 173 600 151 17 .5 .4 28 .2 5.6 19 12 38 196 524 143 »14 .5 .4 28 .8 5.5 19 12 42 206 462 210 *12 .5 .4 50 .2 4.9 18 12 36 139 508 142 *10 .6 °4 31 .2 18 12 34 - 512 - *8 1.3 - Second- Run-off In Month foot-days ^^xlimiTO Minimum Mean ao re-feet October...... 8.1 0.6 0.2 0.26 16 116.2 31 .2 3.87 230 December...... 4,974.5 2,440 3 160 9,870 Calendar year 1957 ...... 26,034.9 2,440 .1 71.3 51,640 579 35 12 18.7 1,150 356 12 6&6 March ...... 1,086 74 20 35.0 2,150 April ...... 4,715 335 38 15V 9,350 Itay...... 12,879 Y68 97 415 25,550 10,001 696 142 353 19,840 July...... 977 117 8 31.5 1,940 47.5 7 .15 1.53 94 15.0 .6 .4 .50 50 Water year 1937-3 3 ...... 35,732.5 2,440 .2 97.9 70,890 Peak discharge.- Dec. 10 (V 2,730 sec.-ft.; Dec. 11 (10 a.m.) 4,100 (6 p.m.) 1,140 sec.-ft. .-ft.; May 13 «Ga_ge height record dcrubtfalj discharge interpolated. 246 HOKELUMNE RIVER BASIN Bear River at Pardoe Camp. Calif. Location.- Water-stage recorder, lat. 38°32', long, 120°15', In sec. 18, T. 8 N., R. 16 E., 2 miles downstream from Bear River Reservoir of Pacific Gas & Electric Co. Altitude, about 5,650 feet. Drainage area.- 33.0 square miles (revised). Records available.- July 1927 to September 1938. Average discharge.- 11 years, 89.8 second-feet. Extremes.- Maximum discharge during year, 5,850 seconoVfeet Dec. 11 (gage height, 12.0 feet/ from floodmarks), from rating curve extended above 1,500 second-feet on basis of velocity-area studies; minimum/ 0.6 second-foot Nov. 2-6. 1927-38: Maximum discharge, that of Dec. 11, 1937; no flow Sept. 8-30, Oct. 1-4, 7-29, 1928. Remarks.- Records good except those for periods of missing or Incomplete gage-height record, which are fair. About 6,000 acre-feet Is stored each year at reservoir above station and usually released during late summer and early winter. Gage-height record and results of three discharge measurements furnished by Pacific Gas & Electric Co. Discharge, In second-feet, water rear October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 89 0.7 8.E 36 121 115 85 232 980 222 11 11 2 85 .6 «8 49 120 154 92 214 952 200 11 11 3 79 .6 »8 48 120 120 99 172 1,040 173 11 11 4 72 .6 *7.S 40 118 107 103 210 1,120 144 11 11 5 65 .6 »7 35 117 102 100 262 980 124 11 11 6 58 .6 *7 30 115 98 93 306 980 115 11 11 7 49 .7 »6.5 27 114 96 93 356 952 107 11 10 8 36 .8 t6.E 26 112 93 100 453 898 102 11 10 9 14 .8 12 23 117 90 112 584 770 88 11 9.5 10 6 .8 385 21 123 88 118 680 725 74 11 9.5 11 3.7 1.2 t3,910 SI 118 93 123 725 566 60 11 9 12 2.3 1.3 t429 21 114 195 120 870 410 51 11 9 13 1.8 1.4 t!68 21 112 177 108 1,120 453 48 11 9 14 1.8 4,2 163 22 110 118 112 1,240 566 44 11 9 16 9.5 6 137 53 108 107 121 1,180 621 39 11 9 16 6.5 19 108 46 107 104 128 1,090 602 35 12 9 17 5 42 94 62 105 102 148 952 500 31 12 9 18 3.1 26 82 52 104 96 190 795 397 27 12 9.5 19 2.1 16 65 49 102 100 191 584 336 26 12 9.5 20 1.7 56 52 43 102 173 199 453 284 25 12 9 21 1.4 49 50 41 100 114 204 500 424 21 12 9.5 22 1.3 40 46 53 100 100 214 660 397 17 12 9.5 23 1.2 30 46 50 99 97 222 845 438 16 11 9.5 24 1.2 22 44 44 99 103 430 925 410 15 11 9.5 25 1.0 17 42 44 98 94 351 898 371 13 11 9.5 26 1.0 15 40 48 97 91 264 952 339 66 11 9.5 27 .9 12 38 90 97 92 2S8 1,040 295 70 11 10 28 .8 10 36 124 97 92 327 898 301 25 11 9.5 29. .8 9.5 33 123 _ 88 341 725 384 16 11 9.5 SO .8 8.5 32 121 85 S66 820 279 13 11 9.5 31 .7 - 33 123 - 84 845 - 12 11 - Second- Run-off in Mo -yl -pftXTP Mean Month foot -days Minimum acre-feet October...... 601.6 89 0.7 19.4 1,190 392. 9 56 .6 197*13 1 V79 6,104.0 3,910 6.5 12,110 Calendar year 1937...... 44,600.0 3,910 .6 122 88,470 f)-t 1, 586 124 <2-L 51.2 3,150 3,046 123 9V 6,040 3,368 195 84 109 6,680 April ...... 5,342 430 85 1V8 10,600 Hay...... 21,586 1,240 172 696 42 820 17,770 1,120 279 592 35 250 July...... 2,019 12 65.1 4^000 348 12 11 ] 1«2 690 291.5 11 9 9° 72 578 Water year 1937-38...... 62,455.0 3,910 .6 171 123,900 Peak diacharfie.- Dec. 11 (about 9 .) 5,850 sec. -ft.; June 1 (8 p.m.) 1,630 sec. -ft. J June 3 (7 p.m.) 1,630 sec. -ft. Wage height missing; discharge interpolated. tOage-height record incomplete; computed on basis of partial estimated graph. KOKELUMNE RIVER BASIN 247 Middle Fork of Mokelumne River at West Point, Calif. Location.-- Water-stage recorder, lat. 38°23 1 15", long. 1EO°31'40", In sec. 10, T. 6 N., R. 13 E., ZOO feet downstream from highway bridge, 1 mile south of West Point, and 3a miles upstream from confluence with South Fork. Altitude, about 2,500 feet. Drainage area.- 67.3 square miles. Records available.- October 1936 to September 1938. October 1911 to October 1936 at site about 1,300 feet upstream. Average discharge.- 36 years (1913-38), 53.8 second-feet. Extremes.- Maximum discharge during year, 1,460 second-feet Dec. 11 (gage height, 5.97 feetj; minimum, 1.3 second-feet Oct. 33. 1911-38: Maximum discharge observed, 3,550 second-feet Jan. 33, 1914 (gage height, 10.0 feet, former site and datum), from rating curve extended above 490 second-feet; practically no flow Aug. 23 to Sept. 14, 1931, and no flow part of day Sept. 9, 10, 1934. Remarks.- Records excellent except those for periods of missing gage heights, Dec. 19 to Jan. 3, Jan. 6-9, which were computed on basis of records for South Fork of Mokelumne River and are fair. Several small diversions above station. Rating table, water year 1937-38 (gage height, In feet, and discharge. In secoid-feet) 0.8 2.0 1.8 75 3.0 316 1.0 7.6 2.0 106 3.5 446 1.2 18 2.2 141 4.0 585 1.4 32 2.4 180 4.5 743 1.6 51 2.7 245 6.0 952 Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 4.2 7 10 22 174 367 134 340 229 61 24 12 2 5.5 7 10 30 167 814 130 379 224 58 23 12 3 9.5 7 9.5 31 257 557 132 32S 218 57 23 11 4 6.5 7 9.5 26 172 392 319 304 220 57 23 11 E 6 7 9.5 25 111 311 458 297 220 55 23 13 6 5.5 7 9.5 24 93 263 340 290 203 52 20 13 7 5 8.5 9 23 84 238 309 287 188 50 21 12 8 4.9 7.5 9 23 88 220 299 290 174 48 22 13 9 4.9 7.5 11 22 267 199 302 304 162 45 22 11 10 4.9 7.5 123 22 792 182 306 328 152 44 21 12 11 4.9 13 837 22 941 197 306 340 141 44 20 12 12 4.9 13 294 22 383 662 309 366 130 42 20 11 13 5 10 122 21 245 908 297 406 123 40 20 11 14 7 12 81 21 254 571 280 446 116 38 19 11 15 9 13 63 73 197 487 273 460 111 37 20 11 16 9 11 50 49 160 487 270 446 106 37 20 11 17 6.5 31 42 59 136 432 285 406 101 36 20 11 18 6.5 20 38 56 132 366 328 379 95 34 17 11 19 7.5 14 35 57 139 32 S 392 340 93 34 17 9.5 20 7.5 13 32 51 125 622 406 311 93 33 17 9 21 7.5 17 30 45 121 473 432 287 88 31 17 9 22 76.5 ' 13 31 42 118 392 419 273 84 30 17 8 23 13 36 39 118 380 419 273 80 29 16 8.5 24 6.5 19 29 36 121 503 419 276 74 28 16 9 25 6 14 26 34 120 392 419 282 70 28 15 9.5 26 6 12 24 33 116 340 379 282 68 30 14 9.5 27 6 12 23 32 114 314 353 282 64 32 14 13 28 6 11 23 36 226 314 340 268 64 29 14 13 29 6 11 22 48 290 340 24r 68 27 13 12 SO 6 10 22 42 266 340 234 67 26 13 11 31 6.5 22 100 143 231 25 13 Second- Month foot-days Maximum Minteu* Mean *££%£ "So\Oct 194.7 31*9 5 4.2 6.28 386 355.0 7 11.8 704 Dec 2,092.0 837 9 67.5 4,150 C alendar year 193 25,584.9 837 2.9 70.1 50,760 Jan 1,166 100 21 37.6 2,310 Pet 5,971 941 84 213 11,840 Mai 12,410 908 143 400 24,610 Apr 9,735 458 130 324 19,310 Ma, 9,981 460 231 322 19,800 JUE 3,826 229 64 128 7,590 Jul 1,217 61 25 39.3 2,410 AugTIBt...... 574 24 13 18.5 1,140 s«r 330.0 13 8 11.0 655 i ater year 1937-2 47,851.7 941 4.2 131 94,900 Peak discharge.- Dec. 11 (9 a.m.) 1,460 sec. -ft. s Pet . 11 (3 a.m.) 1,300 sec. -ft.} Mar. 13 (z a.m.) 1,250 sec. -ft. MCKELUMNE RIVER BASIN Location.- Water-stage recorder, lat. S8°22', long. 120°33', in SWi sec; 16, T. 6 N. R. 13 E., 600 feet downstream from Sawyer Bridge (Bridge noved 900 feet upstream during 1938), 2 wiles upstream from confluence with Middle ?ork, and 2-1 miles southwest of West P;>lnt. Altitude, about 2,000 feet. Extremes.- Maximum discharge curing year, 2,440 second-feet Feb. 11 (gage height, 8.55 feet); minimum, 8 second-feet Oct. 50, 31. 1933-38: Maximum discharge, 5,600 second-feel Fei. 22, 1936 (gage neight, 8.E feet), from rating curve extended above 710 second-feet; no flow Aug. 6, 7, Aug. 12 to Sept. 26, 1954. Remarks.- Records good. Small diversions above station. Discharge, in second-feet, water year October 1937 fco September 1933 Day Oct. HOT. Dec. Jan. Pet. Mar. Apr, May June July Aug. Sept. 1 9 8.5 12 28 343 555 282 399 216 70 31 20 2 11 9 12 36 273 1,240 279 432 S10 29 20 3 21 9 12 41 553 984 282 380 199 29 20 4 17 9 12 35 380 662 391 359 191 65 28 19 5 15 8.5 12 34 228 474 559 349 179 27 19 6 14 8.5 12 31 161 356 432 342 169 60 26 19 7 12 9 12 30 125 284 384 342 157 58 25 20 8 10 9 12 29 117 254 362 345 149 54 26 20 9 9 9 13 27 343 226 369 362 142 54 26 19 10 10 9 160 27 1,320 S06 377 380 134 54 26 18 11 10 19 1,010 27 1,940 219 377 403 128 53 25 18 12 10 18 304 26 733 1,050 377 415 1S1 52 23 18 13 11 14 128 26 464 1.610 355 479 116 51 25 18 14 13 16 87 26 616 934 332 516 110 48 26 18 IB 17 17 70 110 405 708 323 520 107 46 24 18 16 14 14 58 66 287 690 320 492 104 46 24 18 17 14 35 51 80 222 620 338 444 99 46 24 17 18 13 26 47 75 204 506 428 407 97 46 24 16 19 12 17 41 78 216 444 6SO 362 96 42 24 17 20 12 17 38 73 186 817 534 332 96 38 24 16 21 11 20 36 61 171 '652 549 313 93 36 22 17 22 11 16 35 5V 163 534 520 296 87 35 22 18 23 10 15 46 53 167 493 501 290 84 36 22 13 24 10 18 35 49 159 646 511 290 79 37 2S 18 25 9.5 17 34 47 155 520 516 290 77 36 22 18 26 9.6 15 32 45 150 448 440 284 76 40 S2 18 27 9 14 32 43 144 399 407 282 75 44 22 22 28 9 14 30 47 162 384 392 268 74 39 22 24 29 9 13 29 74 365 399 248 78 37 20 22 30 8 13 29 61 323 399 232 77 34 21 20 31 8.5 29 170 S98 220 32 22 Second- Run-off in Month foot -days Maximum Minimum Mean acre-feet Oct 358.5 21 8 13.6 711 HOK 436.6 35 8,5 14.6 866 Dec 2,470 1,010 12 79.7 4,900 0 lendar year 193 34,355 1,260 8 94.1 68,140 Jsn 1,612 170 26 52.0 3,200 Fefc 10,471 1,940 117 372 20,660 Mar 17,891 1,610 206 677 35,490 Apr 11...... 12,255 559 279 408 24,310 Hay 11,073 620 220 357 21,960 Jim 3,620 216 74 121 7,180 Jul 1,486 70 32 47.9 2,950 £ 764 31 20 24.3 1,500 Sep 563 24 16 18.8 1,120 «ater year 1937-3)3...... 62,936 1,940 8 172 124,800 Peak discharge,- Feb. 10 (4 p.in. 2,370 8 ec.-ft.J Feb. 11 (3 a.m.) 2,440 sec.-ft.5 Mar. 13 (S:30 .m.) 2,210 sec.-ft. MOKELUMNE RIVER BASIN 249 Woodbridge canal at Woodbridge, Calif. Location^- Differential water-stage recorder and gate-opening recorder, lat. 58°09'10", long. 121°18'00", in SE-t sec. 34, T. 4 N., R. 6 E., at Woodbridge, at point of diversion. Zero of gages is 52.18 feet above mean sea level. Records available^- April 1926 to September 1938. Average discharge.- 12 years, 98.0 second-feet. Extremes.- Maximum daily discharge during year, 315 second-feet Aug. 9; no flow Nov. 14 to Apr. 24. 1926-38: Maximum daily discharge, 368 second-feet June 30, 1937; no flow during part of each year. Remarks.- Records excellent except those computed from measured volume drained from canal, into Woodbridge Reservoir,which are fair. Discharge computed from records of gate openings and difference in head as shown by recorders. Canal diverts from Woodbridge Reservoir on Mokelumne River, in sec. 34, T. 4 N., R. 6 E., in Woodbridge. Water is used for irrigation of lands south and west of-Woodbridge. Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 184 80 0 48 237 299 256 220 2 174 86 0 37 247 285 277 216 5 159 90 0 -31 241 230 296 216 4 174 109 0 -64 224 253 307 208 6 143 107 0 «48 213 273 310 216 6 122 102 0 *149 242 298 306 215 7 158 99 0 160 265 303 301 210 8 160 103 0 150 278 301 306 220 9 138 115 0 186 262 298 315 220 10 138 116 0 208 246 278 303 208 11 135 94 0 219 229 287 278 188 12 136 63 0 237 200 282 252 194 15 134 s-5 0 241 223 283 242 194 14 126 0 0 237 207 288 230 209 16 124 0 0 227 214 283 252 209 16 126 0 0 251 193 277 265 214 17 128 0 0 251 *-56 255 257 195 18 136 0 0 260 208 263 257 176 19 146 0 0 256 245 273 264 198 20 131 0 0 246 245 276 244 203 Si 137 0 0 227 263 276 214 193 22 128 0 0 206 290 290 234 192 23 118 0 0 223 304 223 248 184 24 112 0 0 222 294 226 248 183 25 110 0 47 227 304 214 247 179 26 108 0 84 211 281 269 239 170 27 103 0 70 215 295 276 239 149 28 104 0 81 ,211 293 288 234 147 SO 114 0 67 194 283 273 251 129 50 84 0 50 201 296 263 198 118 31 81 - 205 - 243 189 - Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet 4,071 184 81 131 8,070 1,159 116 38.6 2,300 0 0 0 0 0 Calendar year 1937...... 46,597 368 0 128 92,440 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April...... 399 84 0 13.3 791 tKr...... 5*658 260 183 11 220 Yj266 304 242 14,410 July...... 8,426 303 214 272 16,710 8,059 315 189 260 15,980 5,773 220 118 192 11,450 Water year 1937-38...... 40,811 315 0 112 80,930 *Dlscharge computed from measured volume drained from canal. Note.- The water level In Voodbrldge Reservoir was temporarily drawn down on Nov. 13, May 3, 4, and June 17, and water from the canal drained back Into the reservoir. In order that the figures may represent the net diverted flow, the reverse flow la Indicated by negative figures. 160262 O 3& 17 250 MOKELUMNE RIVER BASIN Sutter Creek near Sutter Creek, Calif. Location.- Staff gage, lat. 38°23'30", long. 120°46'50", in sec. 9, T. 6 N., R. 11 E., 1.3 miles east of Sutter Creek. Altitude, about 1,150 feet. Drainage area.- 50.6 square miles. Records available.- January 1936 to September 1938. February 1922 to December 1935 at site 1.7 miles downstream. Flow from mine drainage and town sewers enters between. Extremes.- Maximum discharge during the year, 2,020 second-feet Feb. 11 (gage height, 9.7 feet, from floodmarks); minimum observed, 0.3 second-foot Oct. 1. 1936-38: Maximum discharge, 3,900 second-feet Feb. 22, 1936 (gage height, 12.0 feet), which exceeds maximum recorded at downstream station, 1922-35; no flow at times during each year except 1938. Remarks.- Records poor. Staff gage read once daily Oct. 1 to Jan, 15, twice daily Jan. 16 to June 1, and occasionally June 2 to Sept. 30. Discharge for periods of doubtful gage heights, Dec. 13-25, Mar. 20, and for periods of missing gage heights, from June 1 to Sept. 30,was computed on basis of records for North Fork of Cosumnes River near El Dorado and Cosgrove Creek near Valley Springs. Small diversions for irrigation above station. Discharge, in second-feet, Water year October 1937 to September 1938 Day dot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.3 3.1 5.6 e 316 431 116 65 16 8 3.1 2.0 2 .4 2.6 5 9 371 655 107 72 16 8 3.0 1.9 3 1.5 2.6 5 9 464 252 98 61 16 8 2.9 1.9 4 1.5 2.6 4.7 8.5 316 216 132 56 16 7.5 2.8 1.9 6 1.5 2.6 4.4 8.5 216 180 228 55 16 7.5 2.7 1.9 6 1.5 2.4 4.4 8 192 169 139 46 15 7.5 2.6 1.8 7 1.3 2.4 4.7 8 216 143 134 41 15 7.5 2.5 1.8 a 1.1 2.4 4.7 7.5 290 128 120 39 15 Y 2.4 1.8 s 1.0 2.4 5.5 7.5 371 114 107 41 15 7 2.3 1.8 10 1.0 2,4 88 7 830 106 104 39 15 6.5 2.2 1.7 11 1.1 5,5 316 6.5 1,290 110 93 36 15 6.5 2.2 1.6 12 1.1 5.5 192 6.5 371 431 87 35 15 6 2.2 1.5 13 1.4 4.4 23 6.5 343 3SO 80 34 15 6 2.1 1.4 14 1.8 4.1 22 6.5 303 303 78 30 15 5.5 2.1 1.3 15 3.9 3.8 19 55 240 265 76 27 15 5.5 2.1 1.2 16 3.3 5 16 20 216 252 75 29 15 5 2.0 1.3 17 2.7 9 14 48 180 240 75 29 14 5 2.0 1.4 18 2.7 10 12 25 158 240 74 28 14 4.7 2.0 1.5 19 2.7 6 11 27 134 216 70 27 14 4.4 2.1 1.6 20 3.0 5 11 25 116 499 68 27 14 4.3 2.2 1.7 8i 2.7 5 10 25 102 431 63 27 14 4.2 2.3 1.8 22 3.0 5.5 16 23 90 330 65 26 14 4.1 2.4 1.8 23 3.3 6 15 23 83 265 60 24 13 4.0 2.5 1.8 24 3.3 9 15 22 77 536 62 23 12 3.9 2.5 1.8 25 3.0 7.5 13 17 72 290 60 21 11 3.8 2.4 1.8 26 2.7 6 12 15 66 204 55 21 10 3.7 2.3 1.8 27 2.4 5.5 10 11 64 192 52 20 9 3.6 2.2 5 28 2.1 5.5 9 11 126 180 50 19 8.5 3.5 2.2 3.8 29 2.1 5.5 8.5 61 147 56 19 8.5 3.4 2.1 3.6 30 2.8 5.5 7.5 59 _ 143 62 18 8.5 3.3 2.0 3.6 31 3.5 7.5 204 - 124 - 16 - 3.2 2.0 - Second- Run-off in Minimum Mean Month foot -day a Mmcinruni acre-feet October...... 65.7 3.9 0.3 2.12 130 144.8 10 2.4 4.83 287 891.4 316 4.4 28.8 1,770 14,786.0 970 0 40.5 29,320 778.0 204 6.5 25.1 1,540 February...... 7,613 1,290 64 272 15,100 8,122 655 106 262 16,110 April ...... 2,646 228 50 88.2 5,250 May...... 1,051 72 16 33.9 2,080 409.5 16 8.5 13.6 812 July...... 168.1 8 3.2 5.42 333 72.4 3.1 2.0 2.34 144 59.8 5 1.2 1.99 119 Water year 1937-38...... 22,021.7 1,290 .3 60.3 43,680 MOKELUMNE RIVER BASIN 251 North Fork of Cosumnes River near El Dorado, Calif. Location.- Water-stage recorder, lat. 38°36', long. 120°51', in NE-j sec. 35, T. 9 N., R. 10 E., 1 mile north of Nashville', 2.7 miles upstream from mouth, and 6 miles south of El Dorado. Altitude, about 910 feet. Drainage area.- ZOZ square miles. Records available.- October 1933 to September 1938. - August 1911 to September 1933 at site li miles upstream. Average discharge.- 27 years, 196 second-feet. Extremes.- Maximum discharge during year, 5,610 second-feet Feb. 11 (gage height, 8.12 feetj, minimum 5.5 second-feet Oct. 1. 1911-38: Maximum discharge, about 7,600 second-feet Mar. 25, 1928 (gage height, 15.2 feet, from floodmarks, former site and datum), from rating curve extended above 1,000 second-feet; no flow during part of 1924, 1926, 1931, 1933, 1934. Remarks.- Records good except those for period of missing gage heights, May 29 to June 9, which were computed on basis of partial graph and records for Cosumnes River at Michigan Bar and are fair. Irrigation diversions above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. HOT. Dec. Jan. Feb. Har. Apr. May June July Aug. Sept. 1 6 12 27 71 1,130 S18 706 918 580 122 26 14 2 7.5 12 26 78 697 2,370 682 1,060 590 114 26 14 3 9 12 25 84 1,560 1,880 688 897 580 111 26 14 4 14 12 25 80 1,060 1,280 870 825 580 104 25 14 5 13 13 24 73 616 960 1,480 792 540 96 23 14 6 12 13 23 71 420 825 1,100 766 510 89 22 14 7 11 13 23 67 352 706 960 760 490 84 21 14 6 8.5 12 23 64 316 646 890 766 460 78 21 14 9 9 13 23 62 486 580 911 812 420 73 21 15 10 8 13 328 60 1,890 525 960 877 390 67 21 16 11 8 18 2,160 60 4,280 536 995 939 356 64 20 13 12 7.5 37 1,320 58 1,720 1,240 995 995 320 62 20 12 13 8 33 558 57 995 3,220 932 1,100 294 62 19 12 U 10 28 361 55 1,360 2,100 S58 1,280 280 64 20 IS IS 54 33 268 161 904 1,560 818 1,320 272 60 20 IS 16 34 30 220 145 646 1,650 812 1,280 268 52 20 11 17 21 45 182 158 514 1,520 S32 1,140 252 48 20 11 18 16 84 158 228 460 1,170 960 1,030 232 45 20 11 19 14 50 132 189 430 1,060 1,240 911 220 43 20 12 30 15 41 119 182 390 2,420 1,320 825 208 42 19 12 SI 14 51 109 148 361 1,920 1,400 742 196 39 19 IS 22 12 51 101 132 352 1,520 1,320 688 189 35 18 IS 23 12 45 145 132 348 1,440 1,240 688 178 34 19 12 24 12 64 106 122 352 2,100 1,240 712 171 31 19 12 25 11 64 99 117 361 1,560 1,200 748 164 31 18 12 26 11 45 89 110 356 1,280 1,060 748 154 31 17 13 27 11 38 84 107 352 1,100 960 754 145 38 16 14 28 11 31 80 120 366 1,060 911 718 135 42 16 20 29 11 28 78 193 953 897 660 138 34 16 23 30 11 28 73 151 _ 844 932 610 135 30 15 18 31 11 73 413 - 760 - 600 27 14 - Second- Run-off in Month foot -days Maxljnujn Minimum Mean acre-feet 412.5 54 6 13 3 818 969 84 12 32!3 1,920 7,062 2,160 23 228 14,010 81,427.0 2,490 4.1 223 161,500 3,748 413 55 121 7,430 23,064 4,280 316 824 45/750 41,603 525 1,342 82 f 520 April...... 30,169 lUso 682 I* 006 59,840 toy...... 26 j961 1,320 600 870 53,480 9,447 590 135 315 18,740 July...... 1,852 122 27 59 7 3,670 617 26 14 19 9 1,220 409 23 11 13^6 811 Water year 1937-38...... 146,313.5 4,280 6 401 290,200 ale discharge.- Dec. 11 (3 p.m.) 3,880 sec.-ft.) Fet. 11 (7 n.) 5,610 sec.-ft.; Mar. 13 m.) 3,880 sec.-ft. 252 MOKELTJMNE RIVER BASIN Cosuinnes River at Michigan Bar, Calif. Location.- Water-stage recorder, lat. 38°30'00", long. 121°02'45", in SEi sec. 36, T. 8 N., R. 8 E., at highway bridge at Michigan Bar, 5i miles southwest of Latrobe, and 12 miles below confluence of North and Middle Forks. Altitude, about 190 feet. Drainage area.- 537 square miles. Records available.- October 1907 to September 1938. Average discharge.- 31 years, 465 second-feet. Extremes.- Maximum discharge during year, 19,300 second-feet Feb. 11 (gage height, 10.06 feet), from rating curve extended above 10,000 second-feet; minimum, 3.8 second-feet Oct. 1. 1907-38: Maximum discharge observed 23,800 second-feet Feb. 6, 1925 (gage height, 11.2 feet), from rating curve extended above 10,000 second-feet; no flow during part of each year 1908, 1918, 1919, 1924-26, 1931, 1934. ' Remarks.- Records excellent. Irrigation diversions above station. Discharge, In second-feet, water Tear October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 4.1 13 48 156 3.790 1,880 1,590 1,790 1,180 264 57 19 a 6 14 45 177 2,510 6,400 1,510 2,150 1,200 243 54 18 s 9 15 45 204 6,050 4,680 1,520 1,820 1,170 226 50 19 4 9.5 15 45 183 3,790 3,240 1,850 1,630 1,180 218 48 18 6 17 14 45 168 2,080 2,450 3,450 1,560 1,100 204 45 18 6 18 14 44 159 1,330 2,060 2,470 1,530 1,050 186 44 18 7 14 15 43 151 1,020 1,700 2,160 1,520 1,010 177 42 18 8 13 15 43 148 880 1,600 1,980 1,520 960 165 41 18 9 11 17 44 143 1,750 1,430 1,960 1,590 900 153 40 18 10 9 16 410 138 5,950 1,290 2,060 1,700 826 146 40 19 11 9 19 4,680 133 15,500 1,360 2,080 1,840 763 143 39 22 12 8.5 37 3,030 128 5,720 3,240 2.080 1,910 684 135 38 18 IS 9 63 1,260 126 3,130 8,400 1,960 2,150 628 126 36 17 14 11 50 808 123 4,960 5,100 1,790 2,470 585 126 35 16 16 32 45 599 517 2,830 3,680 1,670 2,560 564 119 35 16 16 77 54 480 402 1,910 4,030 1,660 2,490 650 110 36 15 17 44 54 396 396 1,470 3,910 1,690 2,250 529 100 36 14 18 30 143 345 487 1,290 2,930 1,980 2,030 487 97 35 14 19 26 108 305 480 1,190 2,620 2,500 1,790 450 91 34 14 20 23 77 273 494 1,040 5,400 2,640 1,590 444 86 34 14 21 20 80 243 360 960 4,410 2,730 1,440 408 84 32 14 22 19 97 826 315 900 3,450 2,620 1,360 396 76 31 14 23 16 82 296 301 871 3,240 2,490 1,370 372 70 31 14 24 15 89 251 287 853 5,100 2,470 1,430 360 68 32 14 25 14 116 218 260 844 3,680 2,500 1,500 345 64 31 14 26 14 89 197 247 844 3,030 2,100 1,480 330 64 29 14 27 13 72 183 243 826 2,600 1,880 1,510 310 69 26 17 28 13 63 180 264 817 2,450 1,790 1,430 287. 89 26 20 29 13 53 168 522 - 2,200 1,760 1,330 278 75 26 31 SO 14 49 159 396 M 1,930 1,880 1,230 287 64 22 3S 31 13 - 156 1,490 - 1,700 - 1,210 - 60 21 - Seoond- Run-off In Month foot-days MqTripnnii Minimum Mean acre-feet October...... 544.1 77 4.1 17.6 1,080 1,588 143 13 62.9 3,150 15,266 4,680 43 492 30,280 Calendar year 1937...... 216,368.0 7,800 2.3 593 429,200 9,598 1,490 123 310 19,040 February...... 75,105 15,500 817 2,682 149,000 March...... 101,190 8,400 1,290 3,264 200,700 April...... 62,820 3,450 1,510 2,094 124,600 May...... 53,180 2,560 1,210 1,715 105,500 19,623 1,200 278 654 38,920 July...... 264 60 J-fiO1 9ft 7 730 1^124 57 21 36.3 2*230 527 33 14 17.6 1*060 Water year 1937-38...... 344,461.1 15,500 4.1 944 683,300 Peak discharge.- Feb. 3 (3:30 a.m.) 10,200 sec.-ft.; Feb. 11 (4 p.B.) 19,300 sec.-ft.j March 13 (7 a.m.} 10,600 sec.-ft. GOOSE LAKE BASIN 253 Drew Creek near Lakeview, Oreg. Location.- Staff gage, lat. 42°07', long. 120°36', in 3Ei sec. 4, T. 40 S., R. 18 E., at highway bridge half a mile downstream from mouth, of Willow Creek, 1 mile downstream from Drew Creek Dam, and 13 miles southwest of Lakeview. Drainage area.- 211 square miles. Records available.- January 1909 to September 1921, October 1925 to September 1938 in reports of U. S. Geological Survey. January 1909 to September 1936 in reports of State Engineer. Average discharge.- 22 years, (1909-30, 1937-38) 66.2 second-feet, including diversion by North Drew canal. Extremes.- Maximum discharge observed during year, 1,080 second-feet Apr. 25 (gage height, 3.68 feet) by computation of flow over dam and through, gates: no flow at times. 1909-38: Maximum discharge, 3,000 second-feet (estimated) Mar. 1, 2, 1910; no flow at times. Remarks.- Records fair except those for periods of missing gage heights,which were com- puted from known or estimated time of gate openings, or by interpolation or extrapola tion and are poor. Staff gage read about twice a week. Considerable regulation caused by operation of Drew Creek Reservoir, 1 mile above station. Since March 1914 Worth Drew canal of Goose Lake Valley Irrigation Co. has diverted water around station. (See next page.) Rating tables, water year 1937-38 (gage height, in feet, and discharge in second-feet) Dec. 12 to Mar. 21 Mar. 26 to Sept. Z 0.0 1.7 1.8 119 1.6 418 .2 6.0 2.2 168 1.9 119 560 .4 11.5 2.6 225 2.2 155 4.5 720 .7 24 5.0 285 1.0 2.5 200 5.0 895 1.0 43 3.5 364 1.3 3.0 297 5.5 1,080 1.4 77 Discharge, In second-feet, water year October 1937 to September 1938 Day Oot. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug* Sept. 1 0 0 131 #590 1,000 136 84 «81 39 2 0 0 131 590 960 136 «ei 81 *34 S 0 0 131 590 890 136 81 81 34 4 0 0 *131 *590 860 *136 «ei 81 30 6 0 0 131 590 830 130 81 78 *27 6 0 0 143 590 810 «124 81 *76 27 7 0 0 *155 *590 790 124 81 76 27 8 0 0 155 590 770 124 81 *76 *27 9 0 0 155 590 765 124 «81 76 *27 10 0 0 155 590 «688 *124 81 76 27 11 0 0 *155 *590 *560 *124 «81 68 27 12 *122 0 155 590 560 124 81 #60 &27 IS 196 0 *172 590 560 #124 81 60 27 14 *245 0 *182 590 *406 124 81 60 27 16 270 *55 182 590 *121 124 81 52 *26 16 «313 *119 182 »590 10 124 «81 *44 27 17 *364 119 182 590 10 116 81 44 »27 18 364 119 182 *590 *10 *109 «81 44 27 19 364 *119 *316 590 10 109 81 *44 *27 20 *364 119 412 *678 *59 *109 81 *44 27 21 364 *119 *412 770 155 109 81 46 27 22 364 119 412 890 155 109 «81 *47 27 23 364 119 412 960 «146 98 81 47 *20 24 «364 119 412 1,040 136 «86 81 47 0 25 364 *119 500 1,080 *136 86 «81 47 0 26 364 119 *590 *1,040 136 *66 74 47 0 27 *364 125 590 1,040 136 86 #68 »47 0 28 364 *131 *590 1,000 *136 86 *76 46 0 29 364 . 590 1,000 136 86 78 *44 0 30 364 _ 590 1,000 *136 #86 «81 44 0 31 *243 - 590 - 136 - 81 44 - Second- Run-off In Month foot-days ^^X^TTAW Minimum Mean acre-feet October...... 0 0 0 0 0 November...... 0 0 0 0 0 6,485 364 0 209 12,860 0 0 0 0 0 1,620 131 0 3,210 March...... 9,226 590 131 298 April...... 21,708 1,080 590 724 43*060 May...... 12,213 1,000 10 394 24 » 220 3,399 136 86 113 6,740 July...... 2,486 84 68 80*2 4,930 1,808 81 44 58*3 3,590 642 39 0 21.4 1,270 Water year 1937-3 59,587 1,080 0 163 118,180 *Gage read. 254 GOOSE LAKE BASIN Monthly stage and contents of Drew Creek Reservoir near Lakeview, Oreg., water year October 1937 to September 1953 Gage Contents Change in Date height In contents In feet acre-feet during month in acre-feet 47.6 34,960 Get 31 47.7 35,270 +310 47.9 35,890 +620 48.9 39,080 +3,190 49.5 41,100 +2,020 49.9 42,460 +1,360 50.1 43,140 +680 55.9 66,680 +23,540 54.9 62,060 -4,620 52.7 52,690 -9,370 50.2 43,490 -0,200 47.6 34,960 -8,530 46.3 31,070 -3,890 The water year - - -3,890 Note.- Maximum contents observed during year, 67,620 acre-feet Apr. 25 (gage height, 56.1 feet). Run-off, in acre-feet, of North Drew canal near Lakeview, Oreg. water year October 1937 to September 1938 May...... 1,030 June...... 3,150 July...... 3,230 August...... 3,410 September...... 1,250 The water year.... . 12,070 Note.- Ho flow during months omitted. GOOSE LAKE BASIN 255 Cottonwood Creek near Lakevlew, Oreg. Location.- Water-stage recorder, lat. 42°14', long. 130030', In SWi sec. 29, T. 38 S., R. 19 E., 200 yards downstream from Cottonwood Reservoir and 10 miles northwest of Lakeview. Drainage area.- 30 square miles. Records available.- November 1908 to September 1919 and October 1925 to September 1938 In reports of U. S. Geological Survey. November 1908 to September 1919 and October 1924 to September 1936 in reports of State engineer. Average discharge.- 21 years (1909-19, 1924-35), 20.5 second-feet. Extremes.- Maximum discharge recorded during year, 367 second-feet,from rating curve extended above 120 second-feet Apr. 18 (gage height, 4.43 feet); probably no flow at times during winter. 1908-19, 1925-38: Maximum discharge, 500 to 1,000 second-feet during period Apr. 26 to May 1, 1927, when natural flow, estimated as 170 second-feet, was augmented by water escaping from reservoir through break in outlet conduit; no flow at times. Remarks.- Records good except those which were interpolated or extrapolated and are poor. Considerable regulation since 1923 caused by operation of Cottonwood Reservoir, 200 yards above gage. Rating tables, water year 1937- ge height, in feet, and discharge In second-feet) Oct. 1 to Dec. 1 Apr. 8 to Sept. 50 1.4 1.5 2.0 15 1.3 1.3 1.8 9.2 2.6 4S 3.7 213 1.6 5.0 2.3 29 1.4 2.1 2.0 15 2.9 80 4.2 314 1.8 9.5 2.7 64 1.6 4.8 E.3 87 3.3 140 4.5 37e Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Deo. Jan. Feb. Mar. Apr. Jtay June July Aug. Sept. 1 1.6 1.5 4.0 4.2 79 40 21 4.5 a 3.0 1.5 4.2 78 26 12 4.5 3 2.5 1.5 21 66 23 15 4.5 4 2.5 1.5 *50 57 61 20 17 4.5 5 2.0 1.5 66 12 19 17 4.5 6 2.0 1.5 66 35 18 16 4.4 7 1.5 1.5 66 55 15 15 3.3 8 1.5 2.0 50 67 97 5.0 15 1.6 9 1.5 2.0 52 75 *100 5.2 12 1.6 10 1.5 2.0 90 119 *104 E.2 11 1.5 11 1.5 2.0 181 138 108 12 11 1.5 12 1.5 2.5 194 145 105 14 10 1.5 13 1.5 2.0 186 183 104 23 6.8 1.4 14 2.5 2.5 135 192 94 37 7.3 1.4 15 3.5 3.0 108 192 104 40 7.8 1.3 16 2.0 3.0 17S 192 91 39 8.0 8.1 17 2.0 4.0 213 162 83 89 9.0 22 18 2.0 4.0 334 134 58 34 3.8 21 19 2.0 12 356 150 42 35 4.0 20 SO 2.0 58 142 108 37 44 4.0 20 21 2.0 32 39 83 45 43 4.4 20 22 1.5 15 145 116 37 43 3.3 19 23 1.5 52 223 100 28 43 1.9 19 24 1.5 31 249 87 21 42 1.9 35 25 1.5 18 EOO 97 22 42 1.9 52 26 1.5 15 171 130 32 41 3,2 41 27 1.5 11 179 129 27 39 4.4 7.3 28 1.5 9.5 166 108 20 34 4.5 3.3 29 1.5 7.1 63 129 38 32 4.5 2.8 50 1.5 5.8 4.4 127 44 32 4.5 2.6 31 1.5 - 114 30 4.5 Second- Run-off in Month foot-days ^flTT^TffWfl Minimum Mean acre-feet 57.0 3.5 1.6 1.84 111 305.9 58 1.5 10.2 6ff Harch ...... April...... 4,002.4 356 4.4 133 7,940 **r...... 3,361.4 192 4.2 103 6,670 1 n 1»B2V 108 JL.C, 60.9 3,620 July...... 904.4 44 5.0 29 £ 1,790 262.7 21 1.9 8.47 521 335.1 52 1.3 11.2 665 Water year «Gage height missing; discharge interpolated or extrapolated. 256 SACRAMENTO RIVER BASIN Sacramento River at Antler, Calif. Location.- Water-stage recorder, lat. 40°53', long. 122°23', In SEi sec. 13 T. 35 N., R. 5 W., 1,000 feet downstream from Gregory Creek, a quarter of a mile downstream from highway bridge at Antler, and 14 miles upstream from Pit River. Zero of gage Is 934.4 feet above mean sea level. Drainage area.- 461 square miles. Records available.- December 1930 to September 1938. November 1910 to December 1911 and April 1919 to December 1930 at site a quarter of a mile upstream. Average discharge.- 19 years (1919-38), 983 second-feet. Extremes.- Maximum discharge during year, 24,900 second-feet Dec. 10 (gage height, 14.55 feet), from rating curve extended above 12,000 second-feet on basis of AYcTand velocity- area studies; minimum, 191 second-feet Oct. 13. 1910-11, 1919-38: Maximum discharge, 34,000 second-feet Mar. 26, 1928 (gage height, 19.4 feet, from floodmarks, former site and datum), from rating curve extended above 11,600 second-feet on basis of velocity-area studies; minimum, 95 second-feet Aug. 19, 28, 29, Sept. 3, 4, 1931. Remarks.- Records excellent.. No diversion. Discharge, In second-feet, water year October 1937 to Septeafljw 1938 Day Oct. NOT. Dee. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 245 218 1,310 1,060 8,000 7,000 2,460 4,660 2,400 616 309 222 2 419 215 1,090 1,170 8,600 9,660 2,340 4,180 2,530 611 302 222 S 394 209 1,030 1,170 6,430 6,600 3,340 3,470 3,520 628 302 219 4 356 309 950 1,130 4,500 4,830 3,840 3,260 2,530 595 295 319 B 336 309 880 1,060 3,940 3,860 3,360 3,120 3,460 565 288 319 6 221 309 841 1,020 9,860 3,400 3,910 2,980 3,340 535 384 319 7 313 309 802 985 13,400 3,190 3,770 3,050 2,180 515 381 322 8 306 309 770 950 11,900 3,050 3,910 3,360 3,000 496 381 228 9 300 313 915 880 8,300 3,050 3,470 3,620 1,800 486 264 325 10 197 2,780 13,100 867 10,300 2,980 3,540 3,860 1,560 473 278 219 11 197 6,590 19 , 700 648 8,400 2,840 3,630 3,940 1,460 468 374 216 12 194 1,850 9,660 828 5,880 4,500 3,760 4,340 1,380 455 270 213 13 197 1,380 5,520 608 7,600 8,200 3,400 4,980 1,340 446 270 313 14 824 2,160 3,860 848 5,700 5,530 3,360 5,160 1,360 442 267 310 16 495 1,700 3,050 1,210 4,020 6,430 3,190 5,700 1,220 432 367 307 16 333 4,820 2,460 1,720 3,190 14,400 3,330 4,980 1,180 424 364 207 17 280 4,660 2,110 4,100 2,640 8,400 3,860 4,180 1,100 410 360 204 18 256 2,460 1,900 2,980 3,340 6,240 5,340 3,540 995 402 260 201 19 239 3,530 1,700 3,640 2,110 6,060 5,880 3,050 960 386 260 204 20 233 13,000 1,510 3,340 1,900 5,700 5,520 2,840 890 378 257 204 21 224 5,700 1,430 2,000 1,800 4,660 5,520 3,770 890 366 250 204 22 218 5,670 1,330 1,850 1,850 4,100 5,160 2,910 884 358 247 204 25 218 8,200 1,350 1,700 2,000 4,980 4,960 3,120 860 350 244 201 24 215 5,160 1,350 1,510 3,460 4,820 5,340 3,330 812 346 244 301 25 212 3,470 1,130 1,420 2,640 4,180 4,660 3,330 776 338 244 207 26 213 3,580 1,130 1,330 2,580 3,940 4,340 3,400 752 338 341 207 27 209 3,060 1,130 1,290 2,520 3,860 4,180 2,980 722 338 234 213 28 209 1,750 1,090 1,330 2,520 3,700 4,260 2,580 694 338 334 312 29 209 1,510 1,060 1,380 3,260 4,180 2,620 660 330 331 302 30 212 1,330 1,130 1,330 _ 2,910 4,500 2,520 644 323 338 384 31 224 - 1,130 4,600 - 2,580 2,460 - 316 225 - Second- Run-off in Month foot -days MmHunini ISlnijnujB Mean acre-feet 8,086 824 194 261 18,040 84,259 13,000 209 2,809 167,100 86,098 19,700 770 2,777 170,800 520,296 19,700 155 1,425 1,032,000 48,354 4,600 808 1,560 95,910 146,290 12,400 1,800 5,225 290,200 158,880 14,400 3,580 5,125 315,100 April ...... 117,140 5,880 3,340 3,905 232,300 May...... 110,090 5,700 2,460 3,551 218,400 41,759 2,520 644 1,392 82,830 July ...... 13,604 628 316 436 26,780 8,175 309 225 264 16,210 6,628 312 201 221 13,150 Water year 1937-2 8...... 829,263 19,700 194 2,272 1,646,000 Peak discharge.- Dec. 10 (10 p.m.) 24,900 sec.-ft.; Dec. 11 (12:30 p.m.) 22,500 sec.-ft.; Mar. 16 (8130 a.m.) 17,800 sec.-ft. SACRAMENTO RIVER MAIN STEM 257 Sacramento River at Kennett, Calif. Location.- Water-stage recorder, lat. 40°44', long. 122°24', in SWi sec. 2, T. 33 N levfl 'Galsef^ r^dg? on ^T"' £ro ot gage lB ^18 '26 feet above melS sea Ku at ^location? & '°° ^ m>re tha" wlre-we1^ gage of U. a. Weather Drainage area.- 6,600 square miles (not including Goose Lake Basin). Records available.- November 1925 to September 1938. Average discharge.- 12 years (1926-1938), 6,359 second-feet. Erttftn flBfrp^xlf?n dls*aree durlnS year, 132,000 second-feet Dec. 11 (gage height, a?ea and A^T^^a^iSV"8 e?t?^ed above 70' 000 second-feet on basis of felocity- area and AW studies; minimum, 2,400 second-feet Nov. 7 (gage height, 0.49 foot). Octl £~1934. discharge, that of Dec. 11, 1937; miHiSum, 27290 second-feet BSlFTit RiverdBasiS?llent< F1°W regulated ** Stora8e and many diversions above station 'Rating table, water year 1937-38 (gage height, in feet, and discharge, in second-feet) 2,500 2.6 4,820 10.0 24,000 2,700 3.0 5.590 12.0 31,400 1.0 2,910 3.6 6,460 14.0 39,760 1.2 3,130 4.0 7,460 16.0 48,800 1.4 3,370 6.0 9,660 1S.O 58,600 1.6 3,610 6.0 12,100 21.0 74,600 1.8 3,870 8.0 17,600 25.0 97,600 2.0 4,130 Discharge, in second-feet, water year October 1937 to September 193S Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 2,910 2,910 7,050 7,460 30,300 23,000 17,600 20,700 11,400 5,120 4,260 3,740 2 3,740 3,020 6,460 7,250 37,600 36,800 16,700 20,700 11,100 5,590 4,130 3,740 3 3,370 3,020 6,280 7,050 33,000 31,600 16,700 19,100 11,100 5,690 4,260 3,870 4 3,130 3,130 5,750 7,670 25,800 26,200 20,400 18,200 10,900 5,270 4,260 3,740 5 2,910 3,130 5,590 7,460 25,400 22,000 24,700 17,600 10,400 5,430 4,130 3,740 6 2,860 2,650 5,270 7,050 45,600 20,100 24,000 16,700 10,600 5,750 4,000 3,740 7 2,860 2,500 5,120 6,850 57,100 19,400 22, 600 16,100 10,400 5,750 4,130 3,740 8 2,860 2,650 5,120 6,850 59,600 18,200 21,000 16,100 9,680 5,270 4,000 3,870 9 2,860 2,860 5,430 6,850 40,200 17,300 20,400 17,000 9,210 4,970 4,130 3,870 10 2,800 6,210 47,000 5,750 46,500 16,400 21,300 16,700 8,770 4,970 4,130 3,740 11 2,800 13,900 97,200 5,920 42,000 15,900 22,300 16,700 8,330 4,970 4,130 3,740 12 2,800 7,050 66,400 5,920 34,200 20 , 100 22,300 17,000 7,890 4,820 4,130 3,740 13 2,800 5,270 49,800 5,920 38,400 35,900 21,300 17,900 8,110 4,820 4,130 3,740 14 3,740 9,920 35,100 5,750 33,800 30,600 20,400 18,500 8,110 4,820 4,130 3,740 16 3,610 7,890 26,600 7,050 24,700 30,600 19,400 19,400 7,670 4,970 4,000 3,610 16 3,250 13,900 22,000 8,770 20,100 57,600 19,100 19,100 7,460 4,970 4,000 3,610 17 3,020 17,000 18,200 20,100 17,000 42,400 19,700 17,600 7,250 4,B20 3,870 3,740 IS 3,020 11,100 14,700 16,100 15,600 34,200 22,600 15,900 6,850 4,820 4,130 3,740 16 2,910 10,600 13,100 15,300 13,900 45,600 24, 400 14,700 6,460 4,680 4,130 3,740 80 2,910 51,200 12,400 15,300 12,100 46,600 24,700 14,200 6,460 4,680 4,000 3,610 21 2,860 28,200 11,100 12,600 11,400 39,300 25,400 13,700 6,650 4,680 4,000 3,610 22 2,910 17,600 9,920 11,400 11, BOO 34,200 24,700 13,400 6,280 4,680 3,870 3,610 23 3,020 31,800 9,440 10,900 11,600 50,200 24,000 13,900 6,280 4,640 3,870 3,740 24 2,910 29,900 9,210 10,600 13,100 41,500 24,400 13,900 6,100 4,540 3,870 3,740 25 2,860 18,500 8,550 9,680 13,900 33,800 23,300 13,700 5,760 4,540 3,870 3,740 26 2,750 14,200 8,110 8,990 13,700 29,900 22,000 13,700 6,100 4,540 4,000 3,610 27 2,860 11,600 8,330 8,330 14,500 26,900 21,300 13,100 6,100 4,400 4,000 3,610 28 2,860 9,680 7,890 8,770 15,600 25,100 21,300 12,100 5,920 4,260 3,870 4,000 29 2,910 8,330 7,250 8,990 _ 23,000 20,700 11,800 5,750 4,260 3,870 4,130 SO 2,910 7,460 7,260 8,550 - 20,700 20,700 11,600 5,270 4,260 3,740 4,000 31 2,910 - 7,890 16,300 - 19,100 - 12,100 - 4,260 3,740 - Second- Run-off in Month foot -days MqxIniTTm Minimum Mean aore-feet 92,920 3,740 2,760 2,997 184,300 357,180 51,200 2,500 11,910 708,500 549,410 97,200 5,120 17,720 1,090,000 Calendar year 1937...... 2,803,290 97,200 2,600 7,680 5,560,000 291,480 20,100 5,750 9,403 578,100 758,500 59,600 11,400 27,090 1,604,000 934,300 67,600 16,900 30,140 1,863,000 April...... 649 , 400 26,400 16,700 21,650 1,288,000 May...... 492,900 £0 700 11,600 15,900 977,700 238,360 11)400 5 j2VO 7,946 472,800 July...... 151,040 5,750 4,260 4,872 299,600 124 780 4,260 3,740 4,026 247,600 September...... 112^590 4,130 3,610 3,753 223,300 Water year 1937-:S8...... 4,762,860 97,200 2,600 13,020 9,427,000 Peak discharge.- Dec. 11 (l 132,000 sec.-ft.; Feb. B (3 a.m.) 76,800 sec.-ft.} Mar. 16 (1 p.m.) 68,000 sec.-ft. 258 SACRAMENTO RIVER MAIN STEM Sacramento River near Red Bluff, Calif. Location.- Water-stage recorder, lat. 40°15'55", long. 122°10'50", in SEi sec. 34>T. 28 N., R. 3 W., at lower end of Iron Canyon, half a mile downstream from Sevenmile Creek and 4 miles northeast of Red Bluff. Zero of gage is 252.6 feet above mean sea level. Drainage area.- 9,300 square miles (not including Goose Lake Basin). Records available.- January 1902 to September 1938. April 1895 to June 1902 at site at Jellys Ferry, 12 miles upstream from Red Bluff. Average discharge.- 43 years, 11,340 second-feet. Extremes.- Maximum discharge during year, 262,000 second-feet Dec. 11 (gage height, 36.50 feet;, from rating curve extended above 130,000 second-feet logarithmically and on basis of velocity-area and A/d" studies; minimum, 3,020 second-feet Oct. 1 (gage height, 0.30 foot). 1895-1933: Maximum discharge, that of Dec. 11, 1937; minimum, 2,400 second-feet Aug. 13, 1931, Sept. 9, 1934. Discharge for Feb. 3, 1909, previously published as 273,000 second-feet, has been revised to 261,000 second-feet on basis of studies made of flood of Dec. 11, 1937. Remarks.- Records excellent except those for periods of missing gage heights, Feb. 20 to Mar. 16 and July 9-17, which were computed on basis of recorded range of stage, partial recorder graph and records for station at Kennett, and are good. Some storage and many diversions above station. Revisions.- Revised figures of discharge for high-water periods in the water years 1903-4, 1906-7, 1908-9, 1913-14, 1914-15, 1926-27, and 1927-28, superseding those published in Water-supply Papers 251, 271, 298, 391, 411, 597-E, 651, and 671,are given below. Date Discharge Date Discharge Date Discharge (sec. -ft.) (sec. -ft.) (sec. -ft.) 1904 1913 1927 Feb. 16 177,000 Dec. 31 134,000 Feb. 21 130,000 16 *207,000 1914 21 *152,000 1907 Jan. 1 145,000 1928 Mar. 19 157,000 1 *173,000 Mar. 27 132,000 20 184,000 2 139,000 27 *153,000 20 *191,000 Feb. 21 153,000 1909 1915 Jan. 16 181,000 Feb. 2 228,000 21 168,000 2 *239,000 Feb. 3 232,000 3 *252,000 Maximum Mean Run-off in Period (sec. -ft.) (sec. -ft.) acre-feet February 177,000 45,800 2,630,000 Water- year 1903-4... . 177,000 22.200 15,900,000 March 19 184,000 55,100 3,390,000 Water- year 1906-7. ... 184,000 18,900 13,700,000 January 1909 131,000 72,300 4,450,000 February 232,000 63,100 3,500,000 Water- year 1908-9.. .. 232,000 19,700 14,300,000 December 134,000 15,500 953,000 January 1914 145,000 65,700 4,040,000 February 1914 153,000 35,300 1,960,000 Water- year 1913-14... 153,000 18,600 13,500,000 February 228,000 55,800 3,100,000 Water- year 1914-15... 228,000 17,000 12,300,000 February 130,000 46,000 2,550,000 Water- year 1926-27 150,000 14,700 10,700,000 March 19 5Q 132,000 25,200 1,550,000 Water- year 1927-2S. . . 132,000 10,100 7,320,000 *Peak discharge for water-year in which it occurred. Note.- Maximum for May 1907 should be 18,200 sec.-ft. instead of 182,000 as published in Water-Supply Paper 298, page 70. Rating table, water year 1937-38 (gage height, in feet, and discharge, in second-feet) -0.1 2,400 12,100 10 35,900 96,900 + .2 2,860 15,300 11 40,800 22 112,600 .5 3,350 18,700 12 45,800 25 138,900 1.0 4,260 22,400 14 56,800 28 168,000 2.0 6,470 26,500 16 69,000 31 199,000 3 9,150 31,000 18 82,400 33.5 226,500 SACRAMENTO RIVER MAIN STEM Discharge, in second-feet, of Sacramento River near Red Bluff, Calif., water year October 1937 to September 1938 Day Dot. HOT. Dec. Jan. Feb. Bar. Apr. May June July Aug. Sept. 1 3,100 3,610 10,000 10,900 39,300 45,000 26,500 26,500 14,300 6,220 4,660 4,070 2 7,510 3,700 9,430 10,900 54,600 58,000 24,800 26,500 13,700 6,340 4,560 3,980 3 5,750 3,700 8,870 11,200 63,400 50,000 23,600 25,200 13,700 6,720 4,560 3,980 4 4,360 3,700 8,320 11,200 50,100 44,000 26,100 23,600 13,400 6,720 4,560 4,070 e 3,880 3,790 7,780 10,900 40,300 38,000 45,800 22,400 13,400 6,340 4,560 3,980 6 3,610 3,700 7,510 10,600 59,200 35,000 34,800 21,600 13,100 6,470 4,460 4,070 7 3,520 3,350 7,240 10,300 78,300 32,000 32,000 20,500 13,100 6,720 4,360 4,070 8 3,440 3,180 6,98Q 10,000 103,000 30,000 29,600 20,100 12,400 6,340 4,360 4,070 9 3,440 3,520 7,240 10,000 90,200 28,500 28,300 20,500 11,800 6,100 4,360 4,160 10 3,440 3,880 66,600 9,150 94,700 27,500 28,300 20,900 11,200 5,900 4,460 4,070 11 3,440 14,300 225,000 8,590 74,900 26,500 28>300 20,900 10,600 5,800 4,460 4,070 12 3,350 13,400 134,000 8,870 59,200 38,000 29,200 20,900 10,000 5,800 4,460 3,980 13 3,350 7,780 82,400 8,870 61,000 56,000 28,700 22,000 9,720 5,700 4,460 3,980 14 3,790 10,500 56,800 8,590 74,900 47,000 26,900 22,800 10,000 5,700 4,460 3,980 16 5,300 13,400 41,300 11,200 46,300 45,000 25,700 24,000 9,720 5,800 4,360 3,880 16 4,360 18,100 32,900 11,800 35,300 71,600 24,800 24,800 9,150 5,800 4,260 3,880 17 3,880 42,800 27,400 43,100 24,800 79,000 25,700 22,800 8,870 5,700 4,260 3,880 18 3,790 20,100 22,800 32,900 25,700 54,000 27,400 20,900 8,590 5,520 4,260 3,980 19 3,700 16,000 19,800 27,400 24,800 64,700 31,500 19,400 8,320 5,410 4,360 4,070 SO 3,610 91,100 17,700 28,300 20,900 92,500 32,000 18,000 7,510 5,300 4,360 3,980 21 3,520 76,200 16,700 21,600 20,000 62,800 32,000 17,300 8,050 5,190 4,260 3,880 22 3,520 30,100 15,000 18,400 19,000 53,400 32,000 17,000 8,050 5,190 4,260 3,880 23 3,610 37,800 14,300 17,300 19,000 113,000 31,000 16,700 7,780 5,190 4,160 3,980 24 3,610 51,200 13,700 16,000 22,000 110,000 31,000 17,300 7,780 5,080 4,160 3,980 25 3,520 31,000 14,300 15,300 24,000 62,800 31,000 17,300 7,510 5,080 4,160 4,070 12,400' 26 3,440 22,000 14,000 23,000 51,200 29,200 17,000 7,240 4,980 4,160 4,070 27 3,440 17,700 12,100 13,100 28,000 43,800 27,400 16,700 7,510 4,980 4,260 4,070 28 3,520 14,300 12,100 13,400 35,000 39,300 27,400 16,000 7,240 4,760 4,160 4,360 29 3,520 12,400 11,200 15,600 35,800 26,500 15,300 6,980 4,760 4,070 4,870 50 3,520 10,900 10,600 13,700 32,400 26,500 14,700 6,720 4,660 4,070 4,660 31 3,610 11,200 19,800 29,200 14,700 4,760 4,070 Second- Run-Off in Month foot-days Maximum Minimum He an acre-feet Oo t 119,450 7,510 3,100 3,853 236,900 Noy 587,210 91,100 3,180 19,570 1,165,000 Dee 943,670 225,000 6,980 30,440 1,872,000 C 4,258,510 225,000 2,780 11,670 8,448,000 Jan uary 472,970 43,100 8,590 15,260 938,100 Feb 1,310,900 103,000 19,000 46,820 2,600,000 Bar 1,596,000 113,000 26,500 51,480 3,166,000 Apr 874,000 45,800 23,600 29,130 1,734,000 May 624,300 26,500 14,700 20,140 1,238,000 Jun 297,440 14,300 6,720 9,915 590,000 Jul 175,030 6,720 4,660 5,646 347,200 Aug 134,390 4,660 4,070 4,335 266,600 Sep 122,020 4,870 3,880 4,067 242,000 Iater year 1937-3 7,257,380 225,000 3,100 19,880 14,400,000 Peak discharge.- Dec. 11 (7i30 a.m.) 262,000 sec.-ft.; Feb. 8 (12|30 p.m0 ) 122,000 see.-ftoj Mar. 23 (lliSO p.m.) 166,000 sec.-ft. 260 SACRAMENTO RIVER MAIN STEM Sacramento River at Butte City, Calif. Location.- Water-stage recorder, lat. 39°27'35", long. 121°59'35", In NEi sec. 32, T. 19 N., R. 1 W., half a mile south of Butte City. Gage Is set to datum of Corps of Engineers, U. S. Army. Records available.- April 1921 to October 1938 (low-water records only). Gage-height records for high-water periods in years 1914-17, 1920-21, 1929-38 published by Division of Water Resources, Department of Public Works, State of California. Extremes.- Minimum discharge during period June to October 1938, 3,000 second-feet Sept. 3-5 (gage height, 70.44 feet). 1921-38: Minimum discharge recorded, 1,050 second-feet July 15, 25, 26, 1931 (gage height, 67.49 feet). Remarks.- Records good except those for periods of missing gage heights, Sept. 3-7, 13, 14, 16-26, which were computed on basis of records for station at Colusa ^nd are fair. Storage and many Irrigation diversions above station. Discharge, in second-feet, 1937-38 Day Oct. June July Aug. Sept. Oct. 1 2,610 _ 6,750 3,700 3,020 4,620 2 3,050 _ 6,290 3,800 3,020 4,520 3 7,090 .. 6,290 3,700 3,0 00 4,620 4 6,210 _ 6,290 3,700 3,0 00 6,250 6 4,480 - 6,290 3,600 3,000 6,140 6 3,940 I 6,060 3,500 3,100 5,370 7 3,680 _ 6,060 3,400 3,1 00 4,940 8 3,520 _ 6,060 3,400 3,1 10 4,730 9 3,440 _ 5,830 3,300 3,1 10 4,620 10 3,360 - 5,500 3,300 3,200 4,620 11 3,280 _ 5,180 3,300 3,200 4,520 12 3,280 _ 5,080 3,300 3,2 00 4,520 13 3,280 _ 4,860 3,300 3,2 00 4,420 14 3,440 _ 4,660 3,300 3,2 00 4,420 16 4,110 - 4,550 3,300 3,200 4,520 16 5,460 _ 4,550 3,300 3,200 4,940 17 4,570 _ 4,550 3,200 3,2 00 5,040 18 4,110 _ 4,440 3,110 3,2 00 4,840 19 3,850 ,. 4,340 3,200 3,3 00 4,840 20 3,680 9,050 4,340 3,300 3,400 4,730 Si 3,600 8,590 4,240 3,300 3,500 4,620 22 3,520 8,590 4,130 3,300 3,« 00 4,520 23 3,440 8,360 4,130 3,200 3,6 00 4,520 24 3,600 8,130 4,130 3,200 2,1 00 4,520 25 3,600 7,900 4,020 3,110 3,700 4,620 26 3,520 7,440 4,020 3,110 3,800 4,620 27 3,440 7,210 3,920 3,200 3,6 00 4,620 28 3,360 7,210 3,920 3,200 4,C 00 4,620 29 3,360 6,980 3,820 3,200 4,3 10 4,840 50 3,440 6,980 3,710 3,110 4, r 30 5,370 31 3,440 - 3,710 3,110 7,130 Second- UlrMmirai Ifean Run-off In Month foot-days Maximum acre-feat 1937 October ...... 118 ,760 7,090 2,610 3,831 235,600 1938 June 20-30...... 86,440 9,050 6,980 7,858 171,500 July...... 151 V20 6,750 3 710 4 894 300,900 August ...... 103)050 3,800 3)llO 5)324 204,400 September ...... 101,800 4 730 3,000 3,393 201,900 October ...... 151,220 7)l30 4,420 4,878 299 * 900 The period...... 1.179.000 SACRAMENTO RIVER MAIN STEM 261 Sacramento River at Colusa, Calif. Location.- Water-stage recorder, lat. 39°12'50", long. 121°59'55", at north end of Jlmeno grant, just dov\Tistream from highway bridge at Colusa, Colusa County. Gage Is set to datum of Corps of Engineers, U. S. Army. Records available.- April 1921 to October 1938 (low-water records only). Gage-height record for nigh-water periods In years 1920-38 published by Division of Water Resources, Department of Public Works, State of California. Extremes.- Minimum discharge during June to October 1938, 3,000 second-feet Aug. 25 (gage height, 39.03 feet). . 1921-38: Minimum discharge recorded, 8BO second-feet July 25, 26, 1931 (gage height, 34.79 feet). Remarks.- Records excellent. Flow regulated by storage and many Irrigation diversions above station. Discharge, in second-feet, 1937-38 Day Oct. June July Aug. Sept. Oct. 1 2,530 _ 6,700 3,700 3,100 4,630 2 2,900 _ 6,340 3,700 3, LOO 4,630 3 4,430 _ 6,110 3,600 3, LOO 4,630 4 6,430 _ 6,220 3,500 3, LOO 4,900 6 4,820 - 6,220 3,500 3,100 6,000 6 4,140 _ 6,000 3,400 3,100 5,560 7 3,300 _ 5,890 3,400 3, LOO 5,120 8 3,620 _ 6,000 3,300 3, 300 4,900 9 3,540 _ 5,890 3,300 3, 300 4,790 10 3,460 - 5,670 3,200 3,300 4,630 11 3,460 _ 5,340 3,200 3,300 4,680 12 3,380 _ 5,230 3,200 3, 500 4,680 13 3,460 1 5,120 3,200 3, 500 4,570 14 3,460 _ 4,900 3,200 3, 300 4,570 16 3,620 - 4,790 3,300 3,300 4,570 16 4,990 4,790 3,300 3,300 4,900 17 4,820 _ 4,900 3,200 3, 500 5,120 18 4,300 _ 4,900 3,100 3, 100 4,900 19 3,960 _ 4,790 3,100 3, too 5,010 20 3,800 9,100 4,680 3,200 3,500 4,900 21 3,710 8.620 4,570 3,300 3,600 4,790 22 3,620 8 26C 4,460 3,200 3,(500 4,630 23 3,620 8,380 4,350 3,100 3, 500 4,680 24 3,620 8,140 4,240 3,100 3, 500 4,680 25 3,710 7,900 4,240 3,000 3,600 4,680 26 3,620 7,540 4,130 3,100 3,700 4,680 27 3,540 7,180 4,020 3,100 3,f300 4,680 28 3,540 7,060 4,020 3,200 3,£ 10 4,630 29 3,540 7,060 3,910 3,300 4, L30 4,790 30 3,540 6,940 3,800 3,200 4,^160 5,120 31 3,540 3,800 3,200 6,460 Run-off In Month foT£;a Uaximm Minimum Mean acre-feet 1937 rjirc or)n 118,570 6,430 2,530 3,825 ' 1938 86, 180 9,100 6,940 7,835 1 7O QfJft July...... 156,020 6,700 3,800 5,033 309*500 August ...... 101,400 3,700 201,100 September...... 102 ,800 4,460 s'lOO 3^427 203,900 October...... 151,810 6,460 4,570 4,397 301,100 1,186,000 262 SACRAMENTO RIVER MAIN STEM Sacramento River below Wilkins Slough, Calif. Location.- Water-stage recorder, lat. 39°00'35", long. 121°49'25", in Jimeno grant, Colusa County, 1,500 feet downstream from Wllklns Slough and 6 miles southeast of Grimes. Gage is set to datum of Corps of Engineers, U. S. Army. Records available.- August 1931 to October 1938 (low-water records only). Gage-height records for high-water periods in years 1931-38 published by Division of Water Resources, Department of Public Works, State of California. Extremes.- Minimum discharge recorded June to October 1938,-2,580 second-feet Aug. 26. 1331-38: Minimum discharge recorded, 100 second-feet Aug. 1, 1931 (gage height, 14.20 feet). Remarks.- Records good. Discharge for periods of doubtful gage heights, June 26 to July 6, July 15 to Sept. 14, computed on basis of records for Sacramento River at Colusa and unpublished records of gage Heights at Wilkins Slough pumping plant, 1,500 feet upstream. Flow regulated by storage and many irrigation diversions above station. Discharge, in second-feet, 1937-38 Pay Got. June July Aug. Sept. Oct. 1 2,780 _ 6,230 3,180 2,760 5,240 2 2,980 _ 5,880 3,120 2,700 5,240 3 3,470 _ 5,600 3,120 2,640 5,160 4 6,060 _ 5,600 3,060 2,700 5,310 6 5,920 - 6,740 2,940 2,700 6,460 6 4,860 _ 5,530 2,880 2,760 6,460 7 4,380 _ 5,400 2,880 2,760 5,910 8 4,080 _ 5,260 2,820 2,820 5,540 9 3,960 _ 6,260 2,700 2,820 6,310 10 3,860 - 6,140 2,700 2,6 80 5,240 11 3,800 _ 4,740 2,700 2,880 6,160 12 3,740 _ 4,550 2,760 2,940 5,080 13 3,590 _ 4,420 2,700 3,000 4,940 14 3,690 _ 4,220 2,700 3,000 4,860 16 3,800 - 4,100 2,820 3,070 4,940 16 4,380 _ 4,030 2,820 3,200 5,010 17 5,180 _ 4,160 2,760 3,3 30 5,380 18 4,800 4,160 2,700 3,4 00 5,380 19 4,440 _ 4,160 2,700 3,4 60 5,310 20 4,200 - 4,100 2,700 3,520 5,310 21 4,080 _ 3,960 2,820 3,660 5,160 22 3,960 _ 3,840 2,760 3,7 90 5,080 23 3,910 _ 3,660 2,700 3,7 90 5,010 24 3,860 _ 3,540 2,700 3,790 5,010 25 3,910 - 3,600 2,640 3,930 5,010 26 3,910 7,140 3,540 2,580 4,070 6,080 27 3,860 6,860 3,480 2,640 4,S 80 5,080 28 3,800 6,680 3,300 2,760 4,4 20 5,010 29 3,800 6,580 3,240 2,820 4,6 40 6,080 30 3,740 6,440 3,180 2,820 4,9 40 5,310 31 3,800 3,180 2,760 - 5,910 S«cond- Ifaudjmm uinimrm Hean Run-off In Month foot-daya aere-feet 1937 126,700 6,060 2,780 4,087 261,300 1938 June 26-30...... 33,600 7,140 6,440 6,720 66,640 July...... 136,800 6,230 3,180 4,413 86,760 3,180 172)lOO 100,650 4,940 2)640 3)355 199,600 163,980 6,460 4,860 5,290 325,200 The peri<5d ...... 1,035,000 SACRAMENTO RIVER MAIN STEM 263 Sacramento River at Knights Landing, Calif. Location.- Water-stage recorder, lat. 38°48'10", long. 121°42'55", in NEir sec. 14, T. 11 N-, R. 2 E., Just upstream from Southern Pacific Railroad bridge at Knights Landine. Gage is set to datum of Corps of Engineers, U. S. Army. Records available.- April 1921 to October 1938, during low-water periods only, in reports or ueoiogical Survey. 1926-38, during high-water periods, gage heights only, in reports of Division of Water Resources, Department of Public Works, State of California. Extremes.- Minimum discharge during period July to October 1938, 2,780 second-feet AUK 10 tgage height, 13.84 feet). " 1921-33: Minimum discharge recorded, 250 second-feet July 23, 1931 (gage height, Y»8Q 166t J Remarks.- Records good except those for period of missing gage heights, Aug. 30 to Sept. 8, which were computed on basis of records for station below Wilkins Slough and are fair. Storage reservoirs, many irrigation diversions, and considerable return water afreet flow. Backwater from Feather River taken into account in computing records for July 1 to Oct. 31. Discharge, In second-feet, 1937-38 Day Oct. July Aug. Sept. Oct. 1, 3,340 6,820 3,500 3,300 5,600 2 3,400 6,580 3,500 3,2 50 5,600 S 3,760 6,350 3,420 3,200 5,600 4 5,780 6,120 3,280 3,2 00 5,600 5 7,020 6,280 3,130 3,400 6,420 6 5,920 6,120 2,990 3,500 6,900 7 5,080 5,980 2,990 3,6 00 6,420 8 4,720 5,820 2,990 3,7 00 5,980 9 4,4"80 5,750 2,920 3,8roo 5,680 10 4,240 5,750 2,850 3,580 5,520 11 4,120 5,300 2,920 3,500 5,380 12 3,940 4,920 2,920 3, r 20 5,300 13 3,940 4,700 2,990 3,8 00 5,150 14 3,940 4,700 3,130 3,6 50 5,000 15 3,940 4,620 3,130 3,720 5,080 16 4,180 4,550 3,200 3,650 5,220 17 5,260 4,620 3,130 3,9 50 5,450 18 5,140 4,620 3,060 4,£ 50 5,680 19 4,720 4,700 3,130 4,3 80 5,600 20 4,360 4,550 3,280 4,250 5,520 21 4,120 4,400 3,280 4,250 5,450 22 4,000 4,250 3,200 4,4 80 5,300 23 3,880 4,100 3,200 4,4 00 5,300 24 3,820 4,020 3,130 4,£ 50 5,380 25 3,940 3,950 3,130 4,400 5,220 26 3,940 3,880 3,060 4,550 5,080 27 3,820 3,720 3,130 4, r 00 5,220 28 3,820 3,580 3,350 4, r 00 5,300 29 3,760 3,500 3,350 4,S 20 5,300 SO 3,700 3,500 3,350 5,: 00 5,450 31 3,700 3,500 3,300 5,820 Second- Run-off In Hontb foot-days liaf^jifmfl Hlulnun M6BR acre-feet 1937 October ...... 133,780 7,020 3,340 4,315 265,300 1938 July...... 151,250 6^820 3,500 4,879 300,000 August ...... 97,940 3,500 2,850 3,159 194,300 119,250 5,300 3,200 3,975 236,500 171,520 6,900 5,000 5,533 340,200 The period 1,071,000 264 SACRAMENTO RIVER MAIN STEM Sacramento River at Verona, Calif. Location.- Water-stage recorder, lat. 38°46'50", long. 121°36'15", In SEi sec. 23, T. 11 N., R. 3 E., three-quarters of a mile southeast of Verona and 1 mile downstream from Feather River. Gage Is set to datum of Corps of Engineers, U. 3. Army. Drainage area.- 21,400 square miles (not Including Goose Lake Basin.) Records available.- May 1926 to September 1938 (1926-29, low-water periods only). Extremes.- Maximum discharge during year, 68,400 second-feet Dec. 14 (gage height, 38.23 reet; minimum, 4,560 second-feet Aug. 30 (gage height, 10.73 feet). 1926-38: Maximum discharge, that of Dec. 14, 1937; minimum, 281 second-feet July 24, 1931 (gage height, 6.93 feet). Remarks.- Records good. Allowance made for backwater from American River In computing discharge for period Dec. 2 to July 11. Storage, many diversions, and considerable return water affect flow. Above discharge of about 50,000 second-feet unmeasured flow begins over Fremont weir and down Yolo Bypass. Elevation of crest of Fremont weir is 33.5 feet (Corps of Engineers, U. S. Army, datum). Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Deo. Jan. Fell. Mar. Apr. May June July Aug. Sept. 1 5,150 6,260 40, 300 27,200 33,900 50,700 56,900 55,300 50,900 15,300 5,620 5,140 2 5,150 6,260 34,400 25,300 42,400 52,500 55,800 55,000 50,600 15,100 5,380 5,140 S 5,560 6,260 29,600 24,300 51,500 54,900 55,300 55,300 50,100 14,700 5,330 5,140 4 7,160 6,540 26,200 23,800 56,300 56,300 54,500 55,000 49,800 14,000 5,330 5,140 6 8,980 6,400 22,700 23,400 57,700 57,200 54,800 54,800 49,800 13,400 5,380 5,140 6 8,120 6,540 19,200 22,500 56,000 57,200 55,000 54,300 49,600 12,400 5,260 4,780 7 7,320 6,680 17,200 21,800 57,700 56,900 55,300 54,000 49,300 11,400 5,140 4,670 B 6,840 6,540 16,100 21,000 58,000 56,000 55,300 53,500 48,500 10,600 5,020 4,900 9 6,680 6,260 15,200 20,100 59,100 55,500 55,300 53,000 47,800 10,400 4,780 5,380 10 6,400 6,260 16,300 19,200 60,200 55,500 55,000 52,700 46,500 10,200 4,780 5,260 11 5,980 6,540 41,600 18,800 64,200 54,900 55,000 52,700 44,600 9,640 4,900 5,140 12 5,980 6,840 61,600 18,300 67,200 54,400 55,000 53,000 41,800 9,100 4,900 5,140 15 5,980 10,500 66,700 17,700 65,300 54,600 55,000 53, 000 37,600 8,920 4,900 4,900 U 5,980 14,400 68,100 17,200 64,400 56,300 55,000 53,500 33,400 8,920 5,020 5,260 16 6,400 13,100 65,600 17,000 63,600 58,300 55,000 54,800 31,000 8,920 5,020 5,500 16 7,000 13,100 62,500 18,800 62,200 58,000 54,800 55,300 29,300 8,560 4,900 5,750 17 7,960 15,500 60,200 22,500 60,800 58,000 54,500 55,800 27,900 8,560 5,020 6,140 IS 7,800 22,500 58,300 30,800 59,400 58,300 54,300 55,800 27,200 8,080 5,020 6,420 19 7,160 29,600 56,900 38,500 58,600 59,100 54,300 55,300 26,000 7,450 4,900 6,010 20 6,840 31,000 55,200 43,400 57,200 59,100 54,800 54,800 23,500 7,450 5,020 6,010 21 6,840 34,200 54,100 46,300 56,000 59,700 55,300 54,000 21V300 7,450 5,020 6,420 22 6,840 40,500 52,500 47,600 55,200 60,200 55,800 53,200 20,400 7,300 5,020 6,700 23 6,680 44,400 50,700 47,600 B4.400 60,000 56,300 52,700 20,200 7,150 4,900 6,860 84 6,840 49,100 48,100 46,000 53,500 60,200 56,300 52,200 20,200 6,860 4,900 6,850 25 6,540 54,100 45,000 42,900 58,500 62,200 56,300 52,200 20,000 6,420 4,900 6,860 26 6,400 54,400 41,600 39,500 52,000 63,600 56,300 52,400 19,500 6,140 5,020 6,560 27 6,640 5S.500 38,500 36,100 51,500 62,800 56,300 52,700 18,400 6,280 5,020 6,700 28 6,540 52,500 35,400 33,400 50,900 61,100 55,800 52,700 17,300 6,140 5,140 7,450 29 6,400 49,900 32,700 31,300 _ 59,500 55,300 52,700 16,200 6,010 4,900 7,920 SO 6,400 45,700 30,800 30,100 _ 58,400 55,300 52,200 15,800 5,880 4,670 7,600 Si 6,400 29,100 28,900 - 57,400 - J 51,700 - 5,750 4,900 - Second- Uf-rifK^n Run-off In Month foot -days Minimum Mean acre-feet 206,860 8,990 5,150 6,673 410,300 705,380 54,400 6,260 23,510 1,399,000 1,292,400 68,100 15,200 41,690 2,563,000 7,377,330 68,100 1,760 20,210 14,630,000 901,300 47,600 17,000 29,070 1,788,000 1,583,700 67,200 33,900 56,560 3,141,000 March...... 1 788 800 63,600 50,700 57,700 3,548,000 April...... 1,659,900 56,900 54,300 55,330 3,292,000 May...... 1,665,600 55,800 51,700 5S,730 3,304,000 1,004,500 50,900 15,800 33,480 ly 992; 000 July...... 284,470 15,300 5,750 9,176 564*200 156,110 5,620 4, 670 5,036 309 f 600 176,860 7,920 4,670 5,895 350,800 Water year 1937-38...... 11,425,880 68,100 4,670 31,300 22,660,000 Peak discharge.- Dec. 14 (3 a.m.) 68,400 sec.-ft,} Feb. 12'(7 a.m.) 67,500 sec.-ft.} Pet. 14 (11 a.m.) 64,700 sec.-ft. PIT RIVER BASIN 265 Pit River near Canby, Calif. Location.- Water-stage recorder, lat. 41°24' ) long. 120°55', In 3Wi sec. 10, T. 41 N., R. 9 E., at lower end of Warm Spring Valley, about 4 miles southwest of Canby. Al titude, about 4,300 feet. Drainage area.- 1,430 square miles not Including Goose Lake Basin (revised). Records available.- January 1904 to December 1905 and May 1929 to September 1938 (1929- 31 incomplete;. Extremes.- Maximum discharge during year, 8,210 second-feet Dec. 11 (gage height, 12.65 reet) from rating curve extended above 3,600 second-feet; minimum, 2.0 second-feet Aug. 15, 16. 1904-5, 1929-38: Maximum discharge recorded, 17,000 second-feet (figure published 'In Water-supply Papers 751, 766, 791, 811, and 831 erroneous) Mar. 8, 1904 (gage height, 14.0 feet, former datum); minimum discharge, 0.1 second-foot Apr. 29, Aug. 5, Sept. 18, 1934, Aug. 18-21, 1935. Remarks.- Records good. Storage and many Irrigation diversions above station. Discharge, In second-feet, water year October 1937 to Septesber 193S Day Oct. HOT. Dec, Jan. Feb. Mar. Apr. Hay fane July Aug. Sept. 1 11 26 90 241 205 1,600 1 440 1,850 668 46 21 206 2 12 24 90 246 223 2,060 1, 470 1,820 644 33 18 136 3 12 23 73 241 192 2,020 2 020 1,780 620 33 18 86 4 11 22 67 232 196 1,680 2 960 1,710 598 36 18 66 5 11 24 63 223 196 1,470 3 460 1,640 570 56 17 78 6 10 38 68 206 228 1,300 2 880 1,540 538 98 16 101 7 10 31 56 184 325 1,140 2 640 1,440 472 132 16 93 8 9.6 33 62 162 380 1,020 2 560 1,340 450 122 14 71 9 11 29 62 144 416 962 2 340 1,210 422 104 12 60 10 11 26 473 126 698 938 2 130 1,110 380 90 11 52 11 9.6 31 6,610 126 710 932 1 920 1,040 326 83 8.6 47 12 8.5 33 5,950 122 674 1,270 1 650 1,010 296 101 7 46 13 8.5 33 5,950i 125 620 1,850 1 710 962 270 104 3.8 40 U 9 36 4,-170 128 532 1,640 1 570 950 22S 69 2.9 36 16 9.5 50 2,800 140 598 1,370 1 440 1,040 205 58 2.3 33 16 9.6 40 2,060 144 494 1,740 1 370 1,080 228 60 2.3 30 17 9 60 1,680 158 390 1,640 1 300 1,040 161 56 3.5 28 18 9 60 1,400 184 346 1,440 1 270 1,080 151 50 4.1 30 19 9 83 1,140 179 340 1,740 1 340 1,110 270 47 3.8 32 SO 9 107 932 171 325 2,130 1 400 3,140 290 45 4.1 36 21 9.5 144 788 166 305 2,200 1 600 1,210 295 47 5 36 22 10 168 668 223 316 1,960 1 600 1,210 295 47 12 33 23 11 260 621 266 330 1,960 1 680 1,180 290 4S 40 35 24 11 246 416 306 460 1,820 1 680 1,110 228 40 69 33 25 12 192 336 290 710 1,960 1 710 1,020 236 38 83 32 26 12 171 296 260 966 1,850 1 780 944 236 42 56 35 27 13 156 260 232 1,210 1,990 1 ,740 860 205 40 31 32 28 14 132 246 206 1,300 2,130 1 880 806 179 40 31 32 29 18 116 241 192 _ 2,020 1 960 758 140 35 32 31 SO 26 98 241 184 _ 1,850 1 920 710 83 33 31 24 31 29 241 179 - 1,570 - 680 - 30 68 - Seeond- **-r1miH Run-off In Month foot-days Hlnlmum Mean acre-feet 364.6 29 8.6 11.8 723 2,481 260 22 82.7 4,920 oi »y /o 6,670 62 1,226 75,330 Calendar year 1937 ...... 75,733.6 6,670 2.0 207 150,200 6,961 306 122 192 11,820 13,663 1,300 192 484 S6,900 arch ...... 61,262 2,200 932 1,663 101,700 April...... 66,610 3,460 1,270 1,884 112,100 Hay...... 36,380 1,860 680 1,174 72,160 9,962 668 83 332 19,760 July...... 1,866 132 30 69.9 3,680 Pit River at Fall River Mills, Calif. Location.- Water-stage recorder, lat. 41°00', long. 121°26', in NEi sec. 6, T. 36 N., R. b E., 0.8 mile downstream from mouth of Fall River and town of Fall River Mills. Altitude, about 3,235 feet. Drainage area.- 4,150 square miles. Records available.- December 1922 to September 1938. March 1921 to December 1922 at site 0.7 mile upstream. Average discharge.- 15 years (1923-38), 409 second-feet. Extremes.- Maximum discharge during year, 28,600 second-feet Dec. 12 (gage height, 11.8 feet ), from rating curve extended above 9,000 second-feet on basis of velocity-area and J^vS" studies; minimum, 50 second-feet Sept. 9. 1921-38: Maximum discharge, that of Dec. 12, 1937; minimum, 12 second-feet Aug. 5, 1926, Oct. 23, 1936. Remarks.- Records fair. Discharge for periods of missing gage heights, Oct. 1, Dec. 10- 12, Jan. 29 to Feb. 4, Feb. 9 to Mar. 3, computed on basis of records for Pit River below Pit No. 4 Dam; that for Dec. 19-23 computed on basis of estimated gage heights furnished by Pacific Gas & Electric Co. Entire flow of Fall River is diverted through Pit No. 1 power house and returned to Pit River downstream from station. Many small reservoirs and diversions for irrigation above station. River receives return flow from McArthur, Knoch, and other diversions. Gage-height record and results of seven discharge, measurements furnished by Pacific Gas & Electric Co. Rating table, water year 1937-3S (gage height, in feet, and discharge, in second-feet) 0.2 32 215 930 4.5 3,820 B.O 13,350 .4 52 290 1,330 5.0 4,800 9.0 is.gocr 78 385 1,790 5.5 5,950 10.0 20,900 .8 110 500 2,330 6.0 7,200 11.0 25,050 1.0 166 625 2,950 7.0 10,100 Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Doc. Jan. Feb. Kar. Apr. May June July Aug. Sept. 1 80 63 322 618 610 3,730 3,730 4,300 930 290 107 78 2 120 62 290 660 680 4,800 3,730 4,300 906 282 105 77 3 112 62 266 746 770 5,350 4,20O 4,200 898 258 100 61 4 103 60 243 667 830 5,130 5,240 3,820 850 232 87 86 6 102 62 229 618 762 4,300 8,000 3,460 810 200 86 81 6 93 63 209 554 S18 3,640 8,600 3,120 770 173 86 90 7 90 67 191 518 1,000 3,120 6,950 2,950 732 161 77 59 92 84 179 476 1,310 2,870 5,700 2,710 696 145 93 63 9 92 71 179 446 1,980 2,630 5,820 2,480 646 140 90 51 10 92 77 760 424 3,120 2,480 6,450 2,330 612 165 77 70 11 93 95 10, 500 402 3,120 2,400 6,700 2,190 573 191 93 90 12 92 100 24,500 380 2,120 3,460 6,320 2,050 524 191 96 93 92 96 19,700 365 2,190 5,020 5,950 1,920 624 188 90 95 96 95 11,300 360 1,730 5,700 5,350 1,860 494 185 90 96 100 100 8,900 365 1,530 4,910 5,020 1,790 429 185 90 96 16 98 146 6,200 434 1,360 4,400 4,800 1,730 322 179 87 92 . 75 440 4,100 606 1,300 5,020 4,eoo 1,730 317 167 86 90 67 250 3,040 906 1,170 5,580 5,130 1,670 229 156 86 90 64 243 2,480 1,080 1,070 5,130 5,700 1,610 266 138 86 92 64 680 2,050 842 900 9,200 5,960 1,610 308 122 67 96 21 64 740 1,730 778 940 9,800 5,950 1,610 258 203 87 95 62 653 1,520 882 980 S,000 5,580 1,610 335 148 86 93 23 62 1,380 1,330 1,250 1,140 6,950 5,350 1,550 376 114 86 92 62 1,420 1,120 1,090 1,480 6,200 5,350 1,510 366 118 82 90 62 1,190 850 890 2,120 8,000 6,130 1,460 365 126 68 102 26 62 930 818 802 2,630 6,320 5,130 1,370 340 103 77 124 a? 63 695 740 732 3,040 5,350 4,800 1,320 308 90 78 107 28 63 536 653 674 3,200 6,460 4,600 1,260 290 102 71 107 29 63 440 599 640 _ 5,350 4,000 1,190 340 110 75 93 30 64 360 573 600 _ 4,500 4,000 1,150 335 110 75 95 31 64 - 592 570 - 4,000 1,070 - 110 62 - Second- MqT^pi^Ht Run-off in Month foot-days Minimum Mean acre-feet 80 9 22 330 106,153 24,600 179 3,424 210^600 Calendar year 1937...... 237,769 24,500 44 661 471,700 March...... 0 ann 325,200 May...... 15,136 930 229 605 30,020 5,104 290 90 165 10,120 Aug 2>646 107 62 85.4 5,250 S«p 2,653 124 61 88.4 5,260 Water year 1937-3 699,397 24,500 51 1,642 1,189,000 PIT RIVER BASIN 267 Pit River below Pit No. 4 Dam, Calif. Location.- Water-stage recorder, lat. 40°59', long. 121°47', in SWi sec. 17, T. 36 N., R. 2 E., 1 mile downstream from Pit No. 4 Dam and 3 miles downstream from Screwdriver Creek and Pit No. 3 power house. Altitude, about 2,345 feet. Drainage area.- 4,860 square miles, not including Goose Lake Basin. Records available.- July 1927 to September 1938. Average discharge.- 11 years, 2,289 second-feet. Extremes.- Maximum discharge during year, 30,200 second-feet Dec. 12 (gage height, 17.90 feet"),' from rating curve extended above 8,000 second-feet on basis of velocity-area studies; minimum, 1,200 second-feet Nov. 7. 1927-38: Maximum"discharge, that of Dec. 12, 1937; minimum, 715 second-feet (regulated) Mar. 21, 1928. Remarks.- Records excellent. Storage, power plants, and many diversions upstream from station; dally fluctuations usually reduced by automatic regulator at Pit No. 4 Dam. Gage-height record and result of one discharge measurement furnished by Pacific Gas & Electric Co. Discharge, In second-feet, water year October 1937 to September 1938 Day Oet. SOT. Dec. Jan. Feb. Mar. Apr. " y June July Aug. Sept. 1 1/630 1,900 2,300 2,920 3,080 6,160 7,000 7,660 3,750 2,030 1>970 1,850 2 1,780 1,900 2,240 2,550 2,850 6,790 6,790 8,340 3,580 2,410 2,030 1,910 3 1,900 1,950 2,120 3,000 3,240 8,100 6,790 7,880 3,580 2,280 2,030 1,910 4 1,780 2,000 2,000 3,080 3,400 7,880 8,100 7,440 3,240 2,220 1,970 1,910 5 1,880 1,840 1,950 3,000 3,oeo 7,220 10,000 7,220 3,240 2,650 1,910 1,970 6 1,680 1,430 1,950 3,000 2,550 6,580 11,600 6,580 3,580 2,850 1,970 1,910 7 1,680 1,380 1,950 3,000 3,160 6,370 10,800 5,950 3,320 2,550 1,970 1,970 8 1,730 1,630 1,950 3,160 3,580 5,550 9,300 5,950 3,160 2,280 1,970 2,030 9 1,730 1,730 1,950 2,460 3,580 5,550 8,340 6,370 3,080 2,090 2,030 1,970 10 1,730 1,730 2,680 2,150 5,550 4,970 9,060 5,750 3,000 2,090 2,030 1,970 11 1,730 2,120 12,000 2,480 7,000 5,160 10,300 5,550 2,700 2,090 2,030 1,970 12 1,680 2,060 26,200 2,480 5,950 5,160 9,540 5,550 2,700 2,090 2,O90 1,910 13 1,680 1,840 25,800 2,410 4,970 7,220 9,540 5,350 3,240 2,030 2,090 1,970 14 1,680 1,780 16,500 2,340 5,350 8,820 9,060 5,160 3,000 2,090 1,970 1,910 16 1,780 1,840 12,400 2,410 4,680 8,100 8,580 5,160 2,780 2,220 1,910 1,910 16 1,780 1,950 10,300 2,550 4,300 7,660 8,100 5,750 2,700 2,S20 1,850 1,910 17 1,730 2,500 8,100 3,000 4,120 8,100 7,880 5,550 2,620 2,150 1,970 1,970 18 1,730 2,500 6,160 3,400 3,750 9,060 8,820 5,160 2,550 2,150 2,090 1,970 19 1,730 2,120 5,350 3,580 3,320 8,820 8,820 5,160 1,850 2,150 2,030 1,910 20 1,680 2,500 4,970 3,490 2,780 12,600 9,540 4,970 2,780 2,150 1,910 1,850 21 1,730 3,590 4,210 3,000 3,160 14,700 9,540 4,590 2,700 2,150 1,910 1,650 22 1,840 2,770 3,930 3,000 3,320 12,900 9,540 4,500 2,480 2,150 1,850 1,910 23 1,840 2,910 3,660 3,400 3,400 11,600 9,300 4,970 2,550 2,090 1,910 1,97O 24 1,780 3,750 3,490 5,580 4,020 11,300 9,500 4,680 2,340 2,090 1,910 1,970 25 1,680 3,750 2,780 3,240 3,840 12,400 9,060 4,590 2,280 2,090 1,970 1,910 26 1,680 3,670 3,080 2,850 4,300 11,100 9,060 4,210 2,620 2,090 2,030 1,850 27 1,780 3,130 3,580 2,780 5,160 9,540 8,820 4,300 2,620 1,910 1,970 1,850 28 1,780 2,630 3,000 2,920 5,950 9,540 8,540 4,020 2,550 1,970 1,910 1,970 29 1,780 2,240 2,340 3,000 _ 9,060 8,100 3,840 2,280 1,970 1,850 2,030 30 1,780 2,240 3,080 2,620 _ 8,340 7,660 3,930 1,850 2,030 1,850 2,030 31 1,730 - 3,000 2,6SO - 7,660 - 4,690 - 2,030 1,850 - Month Sec end- Maximum Minimum Run-off In foot -days Mean acre-feet October...... 53,920 1,900 1,630 1,739 106,900 69,380 3,750 1,380 2,313 137,600 December...... 185,020 26/200 1,950 5,968 367,000 931 * 590 26 > 200 1 * 380 k,552 1,848,000 89,490 3,880 2,150 2,887 177,500 113,440 7,000 2,550 4,051 225,000 263,810 14,700 4,970 8,610 523,300 April...... 266,680 11,600 6,790 8,889 529,000 May...... 170,720 8,340 3,846 5,507 338,600 84,720 3,750 1,850 2,824 168,000 July...... 67,260 2,850 1,910 2,170 133,400 60,830 2,090 1,850 1,96S 120,700 58,OSO 2,030 1,850 1,934 115,100 Water year 19S7-38...... 1,483,290 26,200 1,380 4,064 2,948,000 Peak discharge.- Dec. 12 (6 p.m.) 30,200 sec.-ft.; Mar. 20 (9»30 p.m.) 16,200 sec.-ft.; Mar. 21 (11.45 a.m.; 16,200 sec.-ft. 268 PIT RIVER BASIN Pit River at Big Bend, Calif. Location.- Water-stage recorder, lat. 41°01', long. 121°55', in sec. 31, T. 37 N., R. 1 E., at village of Big Bend half a mile dovmstream from Nelson Creek and 1 mile upstream from Kosk Creek. Altitude, about 1,700 feet. Drainage area.- 4,920 square miles, not including Goose Lake Basin. Records available.- September 1910 to September 1938. Average discharge.- 27 years (1911-38), 2,820 second-feet. Extremes.- Maximum discharge during year, 34,200 second-feet Dec. 12 (gage height, 16.26 feet), from rating curve extended above 11,000 second-feet on basis of velocity-area studies; minimum, 1,140 second-feet Nov. 7 (gage height, 7.23 feet). 1910-38: Maximum discharge, that of Dec. 12, 1937; minimum, 664 second-feet (regulated) July 9, 10, 1925; minimum dally discharge, 692 second-feet (regulated) July 9, 1925. Remarks.- Records good. Storage, power plants, and many diversions above station; daily fluctuations usually reduced by automatic regulator at Pit No. 4 Dam. Rating table, water jear 1937-38 (gage height, in feet, and discharge, In second-feet) 7.4 1,300 8.6 2,830 11.0 8,450 7.6 1,500 8.8 3,170 12.0 11,800 7.8 1,710 9.0 3,530 13.0 15,700 8.0 1,950 9.5 4,520 14.0 20,400 8.2 S,220 10.0 5,630 15.0 26,100 8.4 2,510 10.5 6,970 15.7 30,300 Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. "ay June July Aug. Sept. 1 1,710 1,830 2,510 3,170 3,440 6,970 8,000 3,770 4,210 2,220 2,220 1,950 g 1,830 1,830 2,440 2,750 3,260 7,850 7,400 9,410 4,010 2,670 2,280 2,020 S 1,950 1,950 2,890 3,360 3,720 9,090 7,700 9,090 4,010 2,590 2,220 2,080 4 1,830 1,950 2,220 3,350 3,910 9,090 9,090 8,450 3,620 2,510 2,220 2,020 5 1,710 1,830 2,080 3,260 3,720 8,150 10,800 8,150 3,620 2,830 2,080 2,080 6 1,710 1,450 2,080 3,170 3,260 7,400 12,600 7,560 4,110 3,080 2,080 2,020 7 1,710 1,390 2,080 3,260 4,010 7,260 11,800 6,830 3,720 2,920 2,080 2,080 8 1,770 1,660 2,080 3,350 4,620 6,280 10,400 6,970 3,620 2,590 2,080 2,150 9 1,770 1,770 2,150 2,830 4,520 6,010 9,410 7,260 3,440 2,360 2,150 2,150 10 1,770 1,830 4,290 2,360 6,550 5,760 10,000 6,690 3,350 2,360 2,150 2,080 11 1,770 2,290 17,000 2,670 7,850 5,760 11,400 6,410 3,000 2,360 2,220 2,080 18 1,710 2,220 30,300 2,750 6,830 5,880 10,800 6,140 3,000 2,360 2,220 2,020 13 1,710 1,950 27,900 2,590 5,760 8,160 10,400 6,140 3,630 2,290 2,290 2,080 14 1,770 1,950 18,400 2,590 6,140 10,400 10,000 5,880 3,350 2,560 2,080 2.020 15 1,830 1,950 14,100 2,670 5,160 9,730 9,730 5,880 3,080 2,440 2,020 2,020 16 1,770 2,220 11,800 2,830 4,840 9,090 9,410 6,550 3,000 2,510 2,080 2,020 17 1,770 2,830 8,770 3,350 4,620 10,000 9,090 6,140 2,920 2,440 2,080 2,080 18 1,770 2,830 6,970 3,820 4,310 10,400 10,000 5,760 2,830 2,360 2,220 2,150 19 1,770 2,440 5,880 4,010 3,820 11,400 9,730 5,510 2,020 2,360 8,150 2,080 20 1,710 4,840 5,630 3,910 3,080 15,700 10,800 5,510 3,170 2,360 2,080 1,950 81 1,710 6,280 4,730 3,440 3,440 16,600 10,800 5,050 3,000 2,360 2,080 2,020 28 1,830 4,520 4,210 3,550 3,720 14,900 10,800 5,050 2,750 2,360 2,020 2,020 23 1,830 4,310 3,910 3,720 3,820 14,100 10,400 5,760 2,750 2,290 2,080 2,080 24 1,770 5,390 3,820 4,010 4,520 13,700 10,800 5,050 2,670 2,360 2,080 2,150 85 1,660 4,840 3,000 3,620 4,310 14,500 10,400 5,050 2,510 2,290 2,150 2,080 26 1,660 4,520 3,440 3,170 4,730 12,900 10,400 4,730 2,830 2,290 2,220 2,020 27 OQ 1,770 3,720 3,910 3,080 5,880 11,400 10,000 4,620 2,920 2,150 2,080 2,020 GO 1,770 3,080 3,260 3,550 6,690 11,100 9,730 4,620 2,830 2,150 2,080 2,150 29 1,770 2,510 2,590 3,350 - 10,800 9,090 4,310 2,500 2,150 2,020 2,220 1,770 2,440 3,350 2,920 9,730 0,090 4,420 2,020 2,220 2,020 2,220 Si 1,710 - 3,350 2,920 - 8,460 5,050 2,220 2,020 Second- Run-off In Month foot-days Maximum Minimum Mean acre-feat 54,590 1,950 1,660 1,761 108,300 84,620 6,280 1,590 2,821 167,800 210,640 30,300 2,080 6,792 417,600 1,034,860 30,300 1,590 2,836 2,063,000 98,970 4,010 2,360 3,193 196,300 130,630 7,860 3,080 4,662 268,900 Karen...... 308,660 16,600 5,760 9,963 612,000 April...... 300,070 12,600 7,400 10,000 696,200 192,700 9,410 4,310 6,216 382,200 94,480 4,210 2,020 3,149 187,400 July...... 74,810 3,080 2,150 2,413 148,400 66,790 2,290 2,020 2,122 130,600 62,110 2,220 1,950 2,070 123,200 Water year 1937-,58...... 1,677,760 30,300 1,390 4,697 3,528,000 Peak dlBgharg*.- Dec. 12 (6 p.m.) 34,200 see.-tt.j Mar. 80 (9t30 p.m.) 18,800 aee.-ft.j Mar. 81 1^ MJ 18,200 sec.-ft. PIT RIVER BASIN 269 Pit River near Ydalpom, Calif. Location.- Water-stage recorder, lat. 40°46', long. 122°14', In NWi sec. 32, 'T. 34 N., R. 3 W., at Sllverthorne Ferry, half a mile downstream from Squaw Creek,li miles southwest of Ydalpom, and 4 miles upstream from McCloud River. Altitude, about 735 feet. Drainage area.- 5,350 square milfes, not Including Goose Lake Basin. Records available.- May 1924 to September 1938. November 1910 to May 1924 at site 400 feet downstream. Average discharge.- 27 years (1911-38), 3,916 second-feet. Extremes.- Maximum discharge during year, 65,000 second-feet Dec. 10 (gage height, 24.20 feet), from rating curve extended above 22,000 second-feet on basis of velocity-area and A\XTstudies; minimum, 1,460 second-feet Nov. 7. 1910-38: Maximum discharge, that of Dec. 10, 1937; minimum, 1,000 second-feet (regulated) July 10, 1925. Remarks.- Records excellent. Storage, power plants, and many diversions above station; dally fluctuations usually smoothed out by automatic regulator at Pit No, 4 Dam. Rating table, water year 1937-38 (gage height, la feet, and discharge, la second-feet) 4.2 1,500 6.6 4,610 9.6 10,260 14 22,900 4.6 1,890 7.0 5,290 10 11,460 16 29,700 6.0 2,340 7.6 6,170 11 14,000 18 37,500 5.4 2,840 8.0 7,090 12 16,800 21 60,400 5.8 3,380 8.6 8,060 13 19,800 24.2 65,000 6.2 3,970 9.0 9,120 Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. DOB. Jan. Feb. Mar. Apr. May June July Axig. Sept. 1 1,890 2,000 3,600 4,610 8,060 10,600 11,200 11,000 6,290 2,680 2,620 2,280 e 2,340 2,000 3,380 4,130 10,300 16,200 10,300 11,700 5,120 3,170 2,520 2,280 s 2,280 2,060 3,240 4,210 11,500 15,400 10,500 11,000 4,950 3,170 2,520 2,340 4 2,110 2,160 3,100 4,610 10,500 14,000 13,500 10,600 4,780 2,970 2,520 2,340 B 1,940 2,110 2,900 4,450 11,000 12,200 16,200 10,000 4,450 3,170 2,460 8,340 6 1,840 1,690 2,840 4,290 12,700 11,600 16,800 9,120 4,780 3,600 2,400 2,340 7 1,890 1,640 2,840 4,290 17,400 11,000 16,000 8,680 4,780 3,450 2,400 2,340 8 1,890 1,740 2,780 4,370 20,400 9,780 14,000 8,680 4,450 3,100 2,400 2,460 9 1,890 1,890 3,100 4,210 16,000 9,340 12,400 8,900 4,290 8,840 2,460 2,400 10 1,890 2,220 24,900 3,240 17,700 3,680 13,500 8,460 4,130 2,840 2,460 2,540 11 1,890 3,520 41,900 3,600 17,700 8,680 14,300 8,060 3,820 2,780 2,520 2,540 12 1,890 3,100 40,400 3,670 15,400 11,000 13,700 8,060 3,670 2,780 2,520 2,340 13 1,840 2,520 34,300 3,620 15,400 16,800 13,500 8,060 4,130 2,780 2,580 2,340 14 2,060 3,9YO 24,200 3,450 14,800 16,000 12,700 8,060 4,1BO 2,780 2,620 2,280 16 2,110 3,670 13,600 4,050 11,500 16,000 12,200 8,060 3,820 2,900 2,340 2,280 16 2,060 5,220 15,400 4,610 9,660 23,900 11,700 8,260 3,670 2,900 2,400 2,280 17 2,000 6,170 11,900 9,660 8,460 19,600 11,700 7,860 3,600 2,840 2,340 2,340 18 1,940 4,610 9,340 7,660 7,660 18,000 12,700 7,470 3,520 2,780 2,520 2,400 19 1,940 4,610 8,060 7,860 6,900 28,300 13,000 7,090 3,040 2,780 2,620 2,540 20 1,890 21,300 7,660 7,860 5,810 29,700 13,700 6,900 3,240 2,780 2,460 2,280 21 1,840 11,900 6,710 6,630 5,810 26,200 14,000 6,630 3,670 2,780 2,400 2,280 22 2,000 7,090 6,990 6,990 6,170 22,900 13,700 6,530 3,460 2,710 2,340 2,280 S3 2,000 10,600 6,630 5,990 6,990 33,100 13,600 6,710 3,380 2, .710 2,340 2,340 24 1,940 12,400 5,630 5,990 6,900 26,200 13,500 6,350 3,310 2,710 2,400 2,400 25 1,890 8,060 4,960 6,460 6,900 22,500 13,200 6,360 3,040 2,640 2,400 2,400 26 1,790 6,710 4,780 4,950 6,900 19,200 12,700 6,170 3,380 2,640 2,460 2,540 27 1,890 5,630 5,120 4,780 8,060 16,800 12,400 6,990 3,450 2,620 2,460 2,340 28 1,940 4,610 4.610 5,120 9,120 16,000 12,200 5,630 3,380 2,460 2,340 2,460 29 1,940 3,900 4,210 6,120 14,800 11,500 5,460 3,170 2,520 2,340 2,620 SO 1,940 3,600 4,450 4,780 _ 13,600 11,200 6,460 2,710 2,520 2,340 2,620 31 1,890 4,780 5,990 - 12,200 5,990 2,620 2,280 - Second- Run-off In Month foot-days ^fflTrtpnun Minimum Mean ao re-feet 60,640 2,340 1,790 1,956 120,300 152,600 21,300 1,640 5,087 302,700 321,300 41,900 2,780 10,360 637,300 1,496,150 41,900 1,540 4,099 2,968,000 -1 or* 158p 9-50 9,560 3,240 5 »i«£ ( 316,300 304,600 20,400 5,810 10,880 604,200 Karoh...... 529*680 33,100 8^680 17,090 1,051,000 nna cnA April ...... 391,500 16 g 800 10,300 13,050 1 fO,OUU to...... 243*090 11,700 5,460 7,842 482,200 116,600 5,290 2,710 3,887 231,300 July...... B7»720 3,600 2,460 2,830 174,000 75,480 2,680 2,280 2,436 140,700 70,660 2,620 2,280 2,562 140,000 Water year 1937-3B...... 2,512,720 41,900 1,640 6,884 4,984,000 Peak dUeharga... Dec. 10 (11 p.*.) 66.000 see.-ft.j Dec 11 (6i30 p.U.) 43,800 sec.-ft.J Mar. OS (4i30 p.m.) 41,700 *ec.-ft. 270 PIT RIVER BASIN South Forte of Pit River near Likely, Calif. Location.- Water-stage recorder, lat. 41°14', long. 120°25', in NEi sec. 11, T. 39 N.. R. 13 E., 1.3 miles (revised) downstream from West Valley Creek and 3£ miles (revised) east of Likely. Altitude, about 4,580 feet. Drainage area.- 248 square miles (revised). Records available.- October 1928 to September 1938. Extremes.- Maximum discharge during year, 766 second-feet May 16 (gage height, 4.90 feet ); minimum, 4.1 second-feet Nov. 27. 1928-38: Maximum discharge, 1,060 second-feet Apr. 27, 1932 (gage height, 5.55 feet), from rating curve extended above 600 second-feet; minimum, 2.7 second-feet Aug. 4, 1931. Remarks.- Records good except those for periods of ice effect or of missing gage heights, (Interpolated), which are fair. Storage and diversions for irrigation above station. Diversion of water through feed canal (capacity about 50 second-feet) to West Valley Creek Reservoir began July 1, 1936. Rating table, water year 1937-38 (gage height, in feet, and discharge, In second-feet) 1.5 4.5 2.O 27 2.8 120 3.6 314 1.6 7.5 2.2 44 3.0 157 4.0 438 1.7 11.E 2.4 64 3.2 204 4.4 574 1.8 16 2.6 5.4 256 726 Discharge, In second-feet, water year October 1937 to September 1938 Day Oet. HOT. Dec. Jan. Feb. Mar. Apr. May Junq. July Aug. Sept. 1 *26 ±14 13 40 40 98 62 504 36S 81 33 128 2 »30 114 11 45 37 79 85 504 350 107 33 130 S #25 14 11 43 33 60 92 438 335 96 46 127 4 *23 14 13 39 40 56 100 380 311 96 61 127 6 »22 13 16 36 36 62 110 356 299 82 76 127 6 »21 14 19 t32 33 53 92 332 284 70 61 127 7 »20 14 22 t31 t32 46 96 329 267 61 109 128 6 19 14 21 t31 t31 46 88 33S 253 58 109 127 9 18 12 16 t31 t30 46 84 387 246 52 112 57 10 18 12 121 t31 t29 42 80 438 233 46 153 26 11 18 16 629 31 t28 43 81 470 233 45 157 25 12 18 13 428 30 f28 63 79 504 259 44 209 125 13 18 13 214 30 t27 72 71 574 262 41 207 +21 14 18 12 151 31 t27 65 70 610 227 42 204 120 ie 22 11 132 34 t27 60 71 667 199 46 204 120 16 20 24 95 33 t27 58 75 726 180 43 204 ±20 17 20 40 85 37 t26 59 70 686 162 40 204 20 18 20 23 74 38 t26 69 101 629 149 40 194 20 19 19 15 61 33 t26 89 159 592 157 37 157 20 20 18 19 55 31 t27 88 204 538 147 35 155 22 Si 18 25 53 33 t33 88 227 487 132 33 153 22 22 18 14 46 40 40 86 246 454 125 32 122 21 29 18 19 47 38 55 101 262 438 139 30 101 21 24 18 20 46 tse 94 120 305 438 117 29 100 23 25 18 12 40 t36 94 104 438 454 89 27 100 25 26 18 8 44 t36 95 83 621 454 92 29 100 24 27 18 6.5 40 34 68 94 438 454 89 36 107 24 28 13 8 38 33 76 90 390 470 90 33 132 33 20 12 12 37 33 75 393 487 90 36 128 28 30 .12 14 40 31 _ 64 438 435 86 39 128 27 31 $13 - 39 33 - gJL 403 - 36 130 - Seeond- Run-off In Month foot-days ^foyKninBi Vlp'lmffB Mean acre-feet 589 30 12 19.0 1,170 459.5 40 6.6 15.3 911 2,657 629 11 86.7 5,270 19,092.5 629 6o5 52.3 37,860 1,072 4& 30 34.6 2,130 1^186 95 26 42*3 2,350 March...... 120 42 7X«6 4,400 April...... 3/328 21 62 184 10,960 *j...... 14,973 726 &£o<*OQ 483 29,700 5,970 368 86 j.»yi Qo 11,840 July...... 1,522 107 27 49.1 3,020 4,009 200 33 129 7,950 1,565 130 20 52.2 3,100 Water year 1937-3 41,749.5 fZ6 6.5 114 82,800 Peak discharge.- Dec. 11 (3 a.m.) 746 sec.-ft.} Apr. 25 (6 p.m.) 610 sec.-ft.; May 16 (11 a.m.) 766 sec.-ft. Stage-discharge relation affected by ice; discharge computed on basis of gage heights and weather records. tGage height missing; discharge computed on basis of records for nearby streams. IQage height missing; discharge Interpolated. PIT RIVER BASIN 271 Hat Creek near Hat Creek, Calif. Location.- Water-stage recorder, lat. 40°41', long. 121°25', in SEi sec. 28, T. 33 N., R. 5 E., 5 miles downstream from village of Big Springs and 11 miles southeast of town of Hat Creek. Altitude, about 4,500 feet. Drainage area.- 155 square miles. Records available._- April 1928 to September 1938. July 1926 to April 1928 at site half a mile upstream. Average discharge.- 11 years (1926-29, 1930-38), 103 second-feet. Extremes.- Maximum discharge during year, 2,500 second-feet Dec. 11 (gage height, 7.75 feet, in well, affected by drawdown), by slope-area method; minimum, 82 second-feet Nov. 8. 1926-38: Maximum discharge, that of Dec. 11. 1937: minimum, 67 second-feet Sept. 7, 1934. Remarks.- Records good. Irrigation canals above station divert from 2 to 30 second-feet. Discharge, In aeoond-feet, water year October 1937 to September 1958 Day Oct. SOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 92 85 104 118 116 113 113 158 260 230 150 130 2 149 65 103 120 115 116 113 154 287 221 149 130 Z 103 85 101 118 114 109 114 147 292 214 147 128 4 96 85 101 118 113 109 120 149 302 206 147 128 6 92 86 101 117 112 111 116 150 308 201 147 128 6 90 88 101 115 111 111 114 150 300 197 145 130 7 90 86 100 114 110 111 116 152 302 196 145 130 8 90 85 100 113 109 109 120 156 308 193 145 132 9 89 84 108 112 108 109 125 162 295 186 141 134 10 89 86 964 112 107 109 125 168 278 182 136 134 11 89 91 1,340 112 106 111 127 178 256 178 136 134 12 88 86 331 112 106 121 1S7 184 238 174 136 134 13 89 88 206 112 105 125 127 208 247 174 136 134 14 97 88 176 112 104 120 127 236 264 176 130 134 15 96 86 163 114 104 118 128 250 261 178 136 134 16 91 94 151 114 104 120 130 250 275 178 136 134 17 91 100 145 116 103 109 136 245 263 176 134 134 18 90 91 135 116 103 120 143 232 238 174 130 130 19 90 101 150 115 102 123 147 214 227 172 154 127 20 89 394 123 114 102 128 147 205 216 166 137 127 81 89 186 120 113 103 120 152 205 241 158 137 127 22 88 135 120 116 104 121 152 219 254 158 157 127 23 88 188 118 115 104 127 150 234 266 156 139 127 84 88 135 117 115 104 125 150 250 270 156 137 128 85 88 121 117 114 106 123 145 259 261 154 139 130 86 88 116 120 114 108 121 143 273 252 152 139 132 87 86 110 118 113 108 120 145 273 243 152 139 152 88 86 107 116 113 108 121 145 254 238 152 139 137 89 85 105 116 112 _ 118 145 266 236 150 134 137 SO 85 104 118 112 113 149 263 241 152 130 137. 51 88 - 117 113 - 113 270 160 130 Second- Run-off In Month foot -day a yflTrliip"* Mlnljuuu Mean acre-feet October...... 2 848 149 85 113*91 9 5,650 3^580 394 84 6^700 6,074 1,340 100 196 12,050 38,857 1,340 78 106 77,030 3,644 120 112 114 7,030 2 999 116 102 107 5,950 March...... 3*624 128 109 117 7,190 April ...... 3 991 J.O&1 K& 113 135 7 920 May...... 6*514 273 147 210 12*920 7 929 308 216 264 15,730 July...... 5,460 230 150 176 10 890 4,305 150 150 139 8 'BSD 3,940 137 127 131 7,810 Vater year 1957-36...... 54,606 1,340 84 150 108,300 Peak dlaehagge.- HOT. SO (10t30 a. .) 596 aec.-ft.J Dec. 10 (9 p.».) 2,180 see.-ft.; Dec. 11 (2 a.m.) 2,eoo sec.-ft. 272 PIT RIVER BASIN McCloud River near McCloud, Calif. Location.- Water-stage recorder, lat. 41°11', long. 122°04', In NEi sec. 34, T. 39 N., R. 2 W., half a mile downstream from Angel Creek and 6 miles southeast of McCloud. Altitude, about 2,750 feet. Drainage area.- 388 square miles. Records available.- April 1931 to September 1938. Extremes.- Maximum discharge during year, 4,600 second-feet Dec. 10 (gage height, 5.4 feet, from high-water mark In gage well) from rating curve extended above 2,400 second-feet on basis of velocity-area and A\/3 studies; minimum, 581 second-feet Oct. 27-29 (gage height, 0.88 foot). 1931-38: Maximum discharge, that of Dec. 10, 1937; minimum, 524 second-feet Nov. 23, 24, 1932. Remarks.- Records good except those for period of missing gage heights, Dec. 2-22, which were~computed on basis of records for station at Baird and are fair. Two small diversions above station .with a total capacity of about 10 second-feet. Discharge, In second-feet, water year October 1937 to September 1958 Day Oct. HOT. Dee. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 610 587 738 781 708 846 1,000 2,310 1,860 1,230 1,000 930 2 627 587 730 721 740 1,000 1,000 2,260 1,900 1,230 1,000 930 3 616 587 720 714 740 1,040 1,000 8,080 1,900 1,190 1,000 930 4 610 587 700 708 728 965 1,080 8,040 1,900 1,190 1,000 930 5 604 587 690 702 714 930 1,120 2,040 1,900 1,190 1,000 895 6 598 587 680 689 760 895 1,080 2,000 1,900 1,190 1,000 895 7 598 587 670 689 930 881 1,080 2,000 1,860 1,150 1,000 895 8 598 581 660 683 1,040 881 1,150 2,000 1,820 1,150 1,000 895 9 593 581 680 677 1,080 874 1,230 2,130 1,770 1,150 965 895 10 593 639 2,500 671 1,080 874 1,310 2,180 1,680 1,150 965 895 11 593 706 3,500 671 1,040 881 1,310 2,220 1,640 1,180 965 895 12 593 651 2,500 665 1,000 965 1,430 8,310 1,550 1,120 965 895 13 593 639 ,700 665 930 1,350 1,430 8,400 1,510 1,120 965 895 14 687 682 ,400 671 881 1,270 1,430 2,540 1,510 1,180 965 895 15 604 694 ,200 689 853 1,190 1,390 2,890 1,510 1,120 965 895 16 598 757 ,100 695 818 1,640 1,430 2,790 1,510 1,120 965 896 XZ 598 795 ,030 695 806 1,640 1,510 2,590 1,470 1,180 965 896 id 593 757 970 695 799 1,430 1,680 2,400 1,390 1,080 965 888 19 593 744 920 695 786 1,430 1,860 2,220 1,390 1,080 930 874 20 587 1,800 880 683 773 1,640 1,950 2,080 1,350 1,080 930 867 21 587 1,200 850 677 760 1,470 2,080 2,000 1,350 1,080 930 867 22 587 968 825 677 754 1,350 2,180 2,000 1,350 1,080 930 867 83 587 1,320 806 677 754 1,270 2,180 2,040 1,350 1,080 930 860 24 587 1,360 799 671 754 1,230 2,260 2,080 1,350 1,080 930 860 25 587 1,080 773 671 754 1,190 2,260 2,080 1,350 1,040 930 860 26 587 954 766 665 754 1,120 2,180 2,130 1,310 1,040 930 863 27 587 880 754 665 754 1,120 2,180 2,080 1,310 1,040 930 860 28 581 821 740 671 760 1,120 2,260 1,950 1,270 1,040 930 867 29 581 789 728 671 _ 1,080 2,310 1,950 1,270 1,040 930 860 SO 587 763 728 671 .. 1,040 2,310 1,950 1,230 1,040 930 853 31 587 - 728 688 - 1,040 1,900 1,000 930 - Socond- Run-off In Month foot-days Kaxlnuon Minimum Mean acre-feet 18,471 627 581 596 36,640 23,670 1,360 581 789 46,950 32,465 3,500 660 1,047 64,390 263,943 3,600 544 723 523,500 21,198 721 665 684 42,050 23,250 1,080 708 830 46,120 March...... 36,65E 1,640 846 1,150 70,710 April...... 48,670 2,310 1,000 1,622 96,640 May...... 67,640 2 890 1,900 g 182 134,200 46,460 1)900 1,230 1,549 92,150 July...... 34,460 1 230 1,000 1,112 68,560 I'ooo 930 959 58,990 September...... 26)591 930 853 886 52,740 Water year 1937-3B...... 408,267 3,500 581 1,119 809,800 Peak discharge.- Dec. 10, 4,600 sec.-ft.} May 16 (7-9 p.m.) 3,090 sec.-ft.} May 17 (6 a.m.) 2,690 sec.-ft. PIT RIVER BASIN 273 McCloud River at Balrd, Calif. Location.- Water-stage recorder, lat. 40°47', long. 122°18', In SE-i sec. 22, T. 34 N., R. 4 W., half a mile downstream from Balrd post office and 14 miles upstream from confluence with Pit River. Altitude, about 700 feet. Drainage area.- 668 square miles. Records available.- December 1930 to September 1938. December 1910 to December 1930 at site 1 mile upstream. Average discharge.- 27 years (1911-38), 1,677 second-feet. Extremes.- Maximum discharge during year, 32,200 second-feet Dec. 10 (gage height, 23.35 feet), from rating curve extended above 10,000 second-feet on basis of extended rating for former station and velocity-area studies; minimum, 735 second-feet Oct. 1. 1910-38: Maximum discharge, that of Dec. 10, 1937; minimum, 650 second-feet for several days during period August to October 1931. (The maximum discharge previously published occurred on Feb. 25, 1917, rather than Feb. 2, 1917, as shown.) Remarks.- Records excellent. No large diversion. Rating table, water year 1937-38 (gage height, in feet, and discharge, in second-feet) 1.0 610 2.0 940 3.0 1,450 5.5 3,450 10.0 9,350 1.2 660 2.2 1,030 3.5 1,770 6.0 3,970 12.0 12,400 1.4 720 2.4 1,130 4.0 2,130 7.0 5,150 14.0 15,600 1.6 785 2.6 1,230 4.5 2,530 8.0 6,450 16.0 19,000 1.8 860 2.8 1,340 5.0 2,970 9.0 7,850 18.0 22,500 Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 802 750 1,840 1,630 7,290 4,190 3, 350 4,660 3,060 1,840 1,400 1,200 2 1,010 750 1,740 1,700 11,200 7,850 3, 150 4,420 3,060 1,840 1,400 1,200 3 840 750 1,630 1,660 8,450 6,730 3, 150 4,190 3,060 1,840 1,370 1,200 4 802 750 1,540 1,630 6,190 5,150 3, 750 3,970 3,060 1,770 1,370 1,200 6 785 750 1,480 1,600 6,060 4,300 4, 540 3,860 3,060 1,740 1,370 1,180 6 768 750 1,420 1,570 12,400 3,860 4, 190 3,750 3,060 1,740 1,340 1,180 7 Y68 750 1,400 1,540 17,600 3,750 3, 970 3,Y50 2,970 1,YOO 1,340 1,200 S 750 750 1,370 1,510 16,100 3,550 3, 970 3,750 2,880 1,660 1,340 1,200 9 750 750 1,420 1,480 9,650 3,450 4, 190 3,860 2,790 1,660 1,340 1,180 10 750 1,420 12,200 1,450 10,400 3,350 4, 300 3,970 2,610 1,630 1,310 1,180 11 750 2,450 22,100 1,420 9,200 3,250 4, 190 4,080 2,530 1,630 1,310 1,180 12 750 1,570 12,200 1,400 7,150 4,780 4, 420 4,190 2,450 1,600 1,310 1,180 13 750 1,340 7,010 1,400 8,300 8,450 4, 190 4,420 2,370 1,600 1,310 1,180 14 1,030 2,610 5,020 1,400 7,010 6,450 4, 080 4,660 2,370 1,600 1,310 1,160 16 940 2,050 4,080 1,630 5,150 6,450 3, 970 5,150 2,290 1,600 1,310 1,160 16 820 3,350 3,450 2,050 4,190 12,800 3, 970 5,150 2,290 1,670 1,280 1,160 17 802 3,970 3,060 3,970 3,650 9,610 3, 970 4,660 2,210 1,570 1,280 1,160 18 785 2,610 2,790 3,450 3,350 7,150 4, 540 4,190 2,130 1,540 1,280 1,160 19 768 2,640 2,530 3,350 2,970 8,450 5, 150 3,970 2,130 1,510 1,280 1,160 20 768 11,100 2,370 3,150 2,790 8,450 5, 150 3,750 2,050 1,510 1,280 1,160 21 768 6,450 2,210 2,790 2,610 6,730 5, 280 3,550 2,050 1,510 1,260 1,160 22 768 4,080 2,130 2,530 2,530 5,670 5, 280 3,550 2,050 1,480 1,260 1,130 23 768 8,960 2,050 2,290 2,450 8,000 5, 150 3,550 2,050 1,480 1,260 1,130 24 768 8,750 1,980 2,130 2,610 7,430 5, 280 3,650 1,980 1,480 1,260 1,130 25 750 5,020 1,910 2,050 2,880 5,800 6, 150 3,550 1,980 1,450 1,230 1,130 26 750 3,550 1,840 1,980 2,880 5,020 4, 780 3,550 1,980 1,450 1,230 1,130 27 750 2,880 1,770 1,910 2,790 4,660 4, 660 3,550 1,910 1,450 1,230 1,160 28 750 2,450 1,740 1,910 2,790 4,300 4, 660 3,350 1,910 1,450 1,230 1,200 29 750 2,210 1,700 1,910 3,970 4, 660 3,250 1,840 1,420 1,230 1,180 30 768 1,980 1,700 1,840 3,650 4, 660 3,150 1,840 1,420 1,200 1,160 31 768 1,660 3,610 3,450 3,150 1,400 1,200 Seoond- mnimum Mean Run-off In Month foot.-d«ys Maximum aore-feet Dot 24,546 1,030 750 792 48,690 N07 88,190 11,100 750 2,940 174,900 Dec 111,340 22,100 1,370 3,592 220,800 Calendar year 193 639,493 22,100 675 1,752 1,268,000 Jan 63,940 3,970 1,400 2,063 126,800 Pet 180,640 17,600 2,450 6,451 358,300 Mar 180,700 12,800 3,260 5,829 358,400 Apr 11...... 131,750 5,280 3,150 4,392 261,300 May 122,250 5,150 3,150 3,944 242,600 JUD 72,020 3,060 1,840 2,401 142,800 Jul 49,140 1,840 1,400 1,685 97,470 Aug 40,120 1,400 1,200 1,294 79,580 Sep 35,090 1,200 1,130 1,170 69,600 Bater year 1937-3 1,099,726 22,100 760 3,013 2,181,000 Peak discharge.- Dec. 10 (11 p.m.) 32.200 sec. -ft. s Dec. 11 (4 p.m.) 22.700 sec. -ft.: Feb. 8 (1 a.m.) 22,300 se'c. -ft. 274 MILL CREEK BASIN Mill Creek near Los Molinos, Calif. Location.- Water-stage recorder, lat. 40°03'20", long. 122°01'15", in Ni sec. 6, T. 25 N., R. 1 W., 5 miles upstream from mouth and 5 miles northeast of Los Molinos. Altitude, about 420 feet. Drainage area.- 134 square miles (revised). Records available.- October 1928 to September 1938. September 1909 to September 1913 (fragmentary) at site 0.3 mile downstream. Average discharge.- 10 years (1928-38), 240 second-feet. Extremes.- Maximum discharge during year, 23,000 second-feet Dec. 11 (gage height, 23.4 feetjfrom floodmarks); minimum, 80 second-feet Oct. 1 (gage height, 0.96 foot). 1928-38: Maximum discharge, that of Dec. 11, 1937; minimum, 49 second-feet Dec. 13, 1932. Remarks.- Records good except those for periods of missing or doubtful gage heights, Dec. 11-15, 18-20, and Dec. 30 to Jan. 20, July 9-29, which were computed on basis of recorded range of stage, partial recorder graph, weather records.and records for nearby streams and are fair. No large diversion. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. Her. Deo. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 85 90 225 250 1,200 700 426 812 858 446 192 141 2 358 89 208 280 2,220 1,120 410 812 880 406 188 138 S 226 86 196 300 1,200 858 410 700 925 390 185 138 t 125 85 185 290 1,020 700 628 678 970 366 180 138 B 109 85 172 290 700 632 812 700 948 358 175 138 6 102 89 167 270 790 768 554 678 948 354 173 136 1 96 104 165 260 722 790 490 678 925 342 170 136 8 92 91 162 250 2,180 768 486 722 902 342 166 136 9 91 91 210 240 2,260 610 522 812 835 330 163 134 10 90 103 5,660 220 2,480 538 554 880 768 320 163 132 11 90 420 12,300 220 1,540 514 550 925 700 310 163 130 12 89 222 4,050 210 1,020 2,280 550 995 632 310 161 130 13 90 148 1,920 210 1,910 1,820 522 1,220 606 310 156 130 14 12S 233 1,OSO 200 1,140 1,070 494 1,480 602 320 156 130 16 199 231 655 400 835 790 498 1,480 610 330 156 128 16 122 928 530 500 598 1,840 506 1,390 632 320 154 128 17 109 1,130 470 900 498 1,120 570 1,220 632 320 154 126 18 104 400 460 600 550 812 812 1,040 538 310 152 126 19 96 440 410 500 494 974 995 902 510 320 152 128 20 94 2,640 370 400 438 1,780 1,020 790 498 280 149 126 21 90 1,190 324 305 430 1,170 1,100 790 538 260 149 126 SS 89 593 314 305 434 880 1,040 835 546 350 149 124 23 89 1,320 314 308 446 2,250 995 880 562 250 149 124 24 88 1,260 292 279 478 1,850 948 948 550 240 147 124 25 86 662 286 264 478 1,120 880 948 534 240 145 124 26 86 468 270 255 450 835 745 995 502 230 145 124 27 85 364 258 246 430 700 745; 948 482 230 143 130 28 85 308 246 246 434 610 678 835 468 220 143 180 29 84 269 246 243 . 546 678 858 454 210 141 138 80 85 244 250 236 - 490 700 835 463 200 141 132 31 96 - 250 944 - 4EO 835 198 141 - Seoond- Month Run-Off In foot-days M°r1mviTi Minimum Mean acre-feet 3,458 358 84 112 6,860 14,383 2,640 85 479 28,530 32,585 12,300 162 1,051 64,650 122,626 12,300 62 336 243,200 10,421 944 200 OOO Z«C 20,670 27 375 430 9*78 54,300 March...... 31)385 2y280 450 1,012 62,250 April...... 20* 318 1,100 410 DarjM ( f 40,300 Hay...... 28*621 1,480 678 923 56,770 20,007 970 454 66V 39,680 July...... 9 312 446 198 300 18,470 4*901 192 141 158 9,720 3,975 180 124 132 7,880 Water year 1937-38...... 206,741 12,300 84 566 410,100 Peak discharge.- Dec. 11 (2 a.m.) 23,000 sec.-ft.; Feb. 2 (4:30 p.m.) 5,050 sec.-ft.j Mar, 23 (7 p.m.J 4,350 sec.-ft. ELDER CREEK BASIN 275 Elder Creek near Henleyville, Calif. Location.- Water-stage recorder, lat. 4O°Q2', long. 122°15', in SEi sec. 10, T. 25 N., R. 4 W., at bridge on Paskenta-Red Bluff road, 1.2 miles upstream from Spring Branch, and 6 miles northeast of Henleyville. Altitude, about 310 feet. Drainage area.- 147 square miles. Records available.- October 1930 to September 1938. Extremes.- Maximum discharge during year, 10,700 second-feet Dec. 10 (gage height, 10.4 feet); no flow during October and parts of November, August, and September. 1930-38: Maximum discharge, that of Dec. 10, 1937; no flow for several months each year. Remarks.- Records good except those for high water, which are fair. No large diversion. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Doo. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 48 70 439 802 327 264 96 16 1.2 0 2 0 44 95 1,150 3,290 300 241 89 16 .3 0 S 0 41 95 495 864 294 208 82 21 0 0 4 0 38 82 430 505 554 187 78 18 0 0 6 0 35 77 305 361 458 168 67 16 0 0 6 0 34 74 466 329 327 153 63 15 0 0 7 0 32 70 353 378 294 158 60 13 0 0 8 0 31 67 610 394 294 163 56 12 0 0 9 0 71 62 2,360 292 300 187 50 11 0 0 10 0 4,080 60 1,150 260 300 192 48 11 0 0 11 54 4,530 60 545 253 306 214 48 9.5 0 0 18 32 1,300 56 475 1,190 306 224 48 8.5 0 0 13 14 545 58 1,990 764 282 252 48 8.5 0 0 14 42 337 58 678 578 252 294 43 8 0 0 IB 31 253 90 369 586 246 327 40 7 0 0 16 366 200 172 235 1,330 252 270 34 6.5 0 0 17 584 170 1,180 190 720 306 224 32 5.5 0 0 18 109 146 253 298 630 476 187 30 5.5 0 0 19 971 129 205 205 594 510 163 28 5 0 0 80 4,270 115 158 166 594 442 148 25 4.5 0 0 21 575 109 132 150 510 428 139 27 3.5 0 0 82 240 104 129 158 1,330 382 139 27 2.8 0 0 23 220 98 126 174 2,830 354 143 25 2.2 0 0 24 162 95 115 220 1,640 398 143 23 2.0 0 0 25 126 90 107 205 914 340 143 21 1.7 0 0 26 101 84 101 178 680 282 139 19 2.0 0 0 27 82 82 95 162 578 258 130 19 2.0 0 0 28 70 77 98 162 535 252 126 18 2.2 0 3.1 20 62 74 107 467 241 126 16 2.2 0 27 SO 54 72 93 _ 398 241 117 16 2.0 0 6.5 31 72 1,100 - 354 104 1.5 0 - Second- Run-off In Honth foot-days Maximum MSjttlaruBi Mean acre-feet 0 0 0 0 0 8,155 4,270 0 272 16,180 13,136 4,530 31 424 26,050 Calendar year 1937...... 42,283.3 4,530 0 116 83,870 5 247 1,180 53 3.69 10,410 14)318 2,360 150 511 March...... 24,950 3 *554290 253 805 49^490 April...... 10,008 241 333 19,840 May...... 5*673 104 183 11,250 June ...... 1^276 96 16 42.5 2,530 July...... 241.6 21 1.5 7 79 479 1.5 87*1.2 0 o!o5 3.0 36.6 0 1.22 72 Water year 1937-38...... 83,030.7 4,530 0 227 164,700 Peak discharge.- NOT. 20 (1:30 a.m.) 6,970 sec.-ft.j Dec. 10 (10 p.m.) 10,700 sec.-ft.j Mar. 2 (4 a.m.) 8,600 sec.-ft. 276 THOMAS CREEK BASIN Thomas Creek at Paskenta, Calif. Location.- Water-stage recorder, lat. 39°52', long. 122°33', in SEi sec. 5, T. 23 N., R. 6 W., half a mile upstream from Paskenta and 4i miles downstream from Hill Creek. Drainage area.- 188 square miles. Records available.- August 1930 to September 1938. October 1920 to August 1930 at site half a mile downstream (gage heights only, prior to January 1921). Average discharge.- 17 years (1921-38), 229 second-feet. Extremes.- Ilaxlmum discharge during year, 16,500 second-feet Dec. 10 (gage height, 16.8 feet,~from high-water mark in gage well), from rating curve extended above 8,000 second- feet on basis of velocity-area studies; minimum, 0.1 second-foot Oct. 1. 1921-38: mxlmum discharge observed, about 16,600 second-feet Mar. 26, 1928 (gage height, 10.5 feet, former site and datum), from rating curve extended above 9,000 second-feet on basis of velocity-area studies; no flow during short periods of each year 1921, 1922, 1924, 1926, 1929-34. Remarks.- Records good except those for periods of missing gage heights, Dec. 11-13, (computed on basis of partial recorder graph, peak stage.and records for Stony and Elder Creeks), those for July 1-6 (interpolated), and those under 5 second-feet, all of which are fair. No diversion above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. HOT. Deo. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.2 6.5 270 190 488 1,860 1,050 1,520 680 100 18 9 2 2.1 7 248 240 740 2,700 1,050 1,370 680 95 16 9 S 4.6 7 228 248 625 1,700 1,100 1,130 659 85 15 8.5 4 13 7 212 224 530 1,220 1,280 1,080 702 80 15 8 6 8.5 6.5 198 212 450 955 1,280 1,050 702 75 13 7 6 7.5 6.5 188 200 560 855 1,100 992 659 70 13 7.5 7 6 6 178 190 720 808 1,050 992 598 68 12 7 8 6 6 174 178 1,040 808 1,160 1,130 524 67 11 7.5 9 5 6 216 164 1,460 720 1,280 1,250 458 64 11 7.5 10 4.8 9.5 8,520 156 1,220 680 1,340 1,280 414 59 11 7.5 11 ' 11 4.6 156 9,700 148 880 700 1,400 1,430 374 57 7.5 12 4.4 113 4,000 140 740 1,400 1,370 1,550 314 56 10 7.5 IS 4.8 66 2,000 137 1,070 1,620 1,220 1,830 291 50 10 8 14 6.5 204 1,260 137 762 1,190 1,160 1,970 291 46 10 8 16 18 172 880 209 575 1,130 1,250 1,970 280 44 11 8 16 £5 990 680 215 500 1,780 1,460 1,720 267 44 11 8 17 20 1,740 530 642 450 1,360 2,040 1,490 234 41 11 8 18 16 511 438 530 515 1,190 2,650 1,220 204 30 11 8.5 19 14 3,040 362 425 425 1,700 2,490 992 187 37 11 8.5 20 11 5,990 310 350 388 2,250 2,180 910 182 33 11 9 21 9 1,700 276 330 400 1,500 2,040 837 187 29 11 9 22 8 940 256 515 488 1,460 1,860 860 196 29 11 9.5 23 7.5 1,180 238 560 575 4,640 1,830 910 189 26 11 10 24 7 856 230 450 830 3,340 1,760 938 174 25 11 10 25 6.5 674 209 400 880 2,180 1,620 965 157 24 11 11 . 26 6.5 562 197 375 830 1,830 1,430 965 146 23 11 12 27 6 462 190 375 808 1,620 1,430 860 133 22 11 13 28 6 382 176 388 830 1,550 1,400 860 122 22 11 13 29 6 332 164 362 1,400 1,250 791 110 21 10 15 SO 6.5 296 203 340 1,250 1,370 724 107 20 9.5 16 SI 7 210 488 1,100 702 19 9 Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet Oct 258.0 25 0.2 8.32 512 KOY 20,434.0 5,990 6 681 40,530 Dee 32,940 9,VOO 164 1,063 65,340 Calendar year 1937...... 109,882.7 9,700 .1 301 218,000 Jan 9,518 642 137 307 18,880 Fefc 19,779 1,460 388 706 39,230 Mar 48,496 4,640 680 1,564 96,190 Apr 44,900 2,650 1,050 1,497 89,Q60 36,288 1,970 702 1,171 71,980 Tun 10,221 702 107 341 20,270 Jul 1,470 100 19 47.4 2,920 Aug 368.5 18 9 11.6 711 Sep 278.0 16 7 9.27 551 Water year 1937-3 224,940.5 9,700 .2 616 446,200 Peak discharge.- KOT. 20 (6 a.m.) 8.950 sec. -ft.; Dec. 10 <10 p.m.) 16,600 sec. -ft.? Mar. 23 DEER CREEK BASIN 877 Deer Creek near Vina, Calif. Location.- Water-stage recorder, lat. 40°01', long. 121°56', in NEi sec. 83, T. 25 N. RTlW., 0.8 mile upstream from concrete diversion dam and 9 miles northeast of Vina Altitude, about 480 feet. Drainage area.- 200 square miles. Records available.- October 1911 to December 1915, March 1920 to December 1937 (station destroyed by flood of Dec. 10-11). Average discharge.- 20 years'(1912-15, 1920-37), 263 second-feet. Extremes.- Maximum discharge during period, 23,800 second-feet Dec. 10 (gage height, 16.6 feet, from floodmarks), from rating curve extended above 8,000 second-feet on basis of velocity-area studies; minimum, 70 second-feet Oct. 1. 1911-15; 1920-38: Maximum discharge, that of Dec. 10, 1937; minimum, 43 second- feet Dec. 13, 1932. Remarks.- Records good. No diversion above station. Rating table, period Oct. 1 to Dec. 10, 1937 (gage height, in feet, and discharge, in second-feet) 0.3 46 1.3 225 3.6 1,250 6.0 3,040 .4 57 1.6 314 4.0 1,490 6.5 3,530 .6 69 2.0 452 4.5 1,820 7.0 4,030 83 2.4 616 5.0 2,200 7.7 4,770 115 2.8 810 5.5 2,600 8.4 5,540 155 3.2 1,020 Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. *«y June July Aug. Sept. 1 73 86 202 2 180 82 186 3 188 80 177 4 121 80 168 6 96 80 157 6 88 83 149 7 80 89 144 3 79 89 140 9 77 86 186 10 77 95 5,520 11 77 282 12 77 212 _ 13 79 138 _ 14 101 153 _ 16 159 212 - 16 112 504 _ 17 95 1,060 _ 18 89 394 _ 19 86 363 _ 20 83 2,550 - 21 82 1,100 22 80 518 _ 23 80 1,190 24 79 1,100 _ 25 79 630 - 26 79 452 27 79 353 _ 28 77 295 _ 29 77 252 _ 30 80 222 31 88 Second- Run-off in Month foot-days Maximum Miuij&uni Mean acre-feet October...... 2 897 188 73 93 5 5,750 12,830 2,550 80 428 ' 25,450 Fet Mar April...... Ifcy...... July...... Water year 278 CHICO CREEK BASIN Chlco Creek near Chlco, Calif. Location.- Water-stage recorder, lat. 39°46', long. 121 U46', In Arroyo Chlco grant, 1 mile upstream from golf clubhouse In Municipal Park, and 6 miles northeast of Chico, Butte County. Altitude, about 400 feet. Drainage area.- 68.3 square miles. Records available.- May 1930 to September 1938. Extremes.- Maximum discharge during year, 8,260 second-feet Dec. 10 (gage height, 16.6 feet), from rating curve extended above 5,000 second-feet on basis of rating at cable gage, velocity-area studies, logarithmic extension of station rating; minimum, 20 second-feet Oct. 1. 1930-38: Maximum discharge, that of Dec, 10, 1937; minimum, 10 second-feet Dec. 11, 1932. Remarks.- Records excellent except those for period of missing gage heights, Dec. 11-13, which were computed on basis of records for Butte Creek near Chlco and West Branch of Feather River near Yankee Hill and are fair. No large diversion above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 22 27 75 83 1,480 1,010 340 264 S3 47 33 28 2 55 25 67 90 2,640 1,840 310 278 82 53 33 28 3 46 24 61 88 2,340 1,330 300 255 80 45 33 28 4 32 24 57 83 1,240 850 438 236 77 45 32 28 5 28 24 53 80 850 639 730 224 76 44 32 28 6 24 24 53 75 1,140 588 572 216 75 43 31 28 7 24 27 44 73 1,530 588 480 208 71 43 33 28 8 23 27 43 70 3,480 622 438 202 69 40 32 29 9 23 25 68 67 3,340 572 429 201 68 40 31 28 10 23 27 3,290 64 3,620 508 417 197 66 40 31 28 11 23 98 5,530 62 2,580 486 396 195 68 40 30 28 12 23 84 1,850 61 1,480 2,300 374 197 66 40 30 2S 19 24 49 904 60 1,480 2,340 352 201 65 39 30 28 14 32 64 564 59 1,170 1,380 324 212 62 38 30 28 15 45 99 395 136 830 950 300 212 62 39 30 27 16 35 153 302 134 622 1,380 290 204 60 38 30 27 17 28 457 238 656 492 1,280 292 186 58 38 30 27 18 27 146 198 428 462 950 324 170 57 38 30 27 19 26 107 167 382 402 930 368 157 57 38 30 28 20 25 1,340 147 314 346 1,430 374 146 56 38 30 28 21 24 625 129 259 313 1,100 368 137 54 37 30 27 22 24 237 123 233 332 870 362 129 54 36 30 27 03 24 406 123 216 354 2,440 332 123 52 36 30 27 24 24 595 113 190 414 2,460 352 117 50 36 30 28 25 24 308 110 167 432 1,330 371 112 49 36 30 28 26 24 198 103 152 411 930 310 10S 48 36 29 28 27 24 148 96 143 391 711 285 105 47 35 29 31 28 24 116 92 156 391 605 273 104 47 34 29 50 29 24 99 88 148 _ 508 257 99 49 34 29 35 30 24 85 86 133 _ 441 259 94 45 33 28 30 31 30 - 83 681 - 3S2 - 89 - 33 29 - Second- Run-off In Month foot -days ^*s TrT TTTUHI MinlM» Mean acre-feet October...... 858 55 22 27.7 1,700 5,668 1,340 24 189 11,240 December...... 15,252 5,530 43 492 30,250 Calendar year 1937...... 57,539 5,530 20 158 114,100 5,543 681 59 179 10,990 34,562 3,620 313 1,234 68,550 33, 750 2,460 382 1,089 66,940 April...... 11,007 730 257 367 21,830 May...... 5,378 27S 89 173 10,670 1,853 83 45 61.8 3,680 July...... 1,212 53 33 39.1 2,400 943 33 28 30.4 1,870 868 50 27 28.9 1,720 Water year 1937-38...... 116,894 5,530 22 320 231,800 Peak discharge.- Dec. 10 ( 12 p. 8,260 see. -ft. j Feb. 2, (6 p.m.) 4,100 sec. -ft. j Feb. 9 (7 p.m. ) 4,480 sec.-ft. STONY CREEK BASIN 279 Stony Creek above Stony Gorge Reservoir, Calif. Location.- Water-stage recorder, lat. 39°30'05", long. 122°31'00", in sec. 15, T. 19 N., R. 6 W., 700 feet downstream from road bridge and 6 miles south of Stony Gorge Dam. Drainage area.- 266 square miles. Records available.- October 1933 to September 1938. Extremes.- Maximum discharge during year, 20,800 second-feet Dec. 10 (gage height, 13.1 reetj, from rating curve extended above 2,100 second-feet, on basis of studies of change in storage in Stony Gorge Reservoir 6 miles downstream: minimum, 11 second- feet Oct. 28. 1933-38: Maximum discharge, that of Dec. 10, 1937; minimum, 2.4 second-feet Aug. 22, Sept. 8, 1934. Remarks.- Records good except those for periods of missing gage heights,Oct. 8-10, Apr. 30, Hay 1, which were interpolated, and those for Nov. 19-21 .which were computed from Stony Gorge Reservoir record and are fair. Flow regulated by storage in East Park Reservoir above station. Gage-height record furnished by E. A. Garland, water- master for Stony Creek and tributaries. Discharge, In second-feet, water year October 1937 to September 1958 Day Oot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 14 18 164 278 1,550 1,550 860 489 316 122 47 30 2 23 18 141 414 3,590 3,060 830 436 316 122 46 31 3 26 19 136 368 3,060 2,030 830 404 313 120 37 29 4 24 19 124 320 2,030 1,370 920 404 316 118 37 25 5 23 20 116 292 1,500 1,110 1,290 409 316 112 34 27 6 22 20 109 285 1,550 1,140 1,040 409 316 101 34 26 7 19 20 105 274 1,700 1,500 920 418 306 97 38 25 8 18 20 101 260 2,270 1,500 860 436 286 95 42 26 9 17 21 242 260 5,980 1,180 860 454 2S5 90 38 24 10 16 24 6,830 250 4,840 1,010 860 458 278 90 35 24 11 15 151 12,100 247 3,270 1,110 830 481 264 86 35 22 12 14 116 5,610 241 2,090 3,490 800 510 260 78 39 24 13 14 64 2,990 235 4,020 3,060 740 565 229 72 38 24 14 18 98 1,920 236 3,200 2,030 728 640 220 65 40 24 15 22 144 1,370 268 1.860 1,650 718 655 214 63 40 26 16 21 484 1,180 388 1,370 2,390 734 640 209 61 34 25 17 20 1,210 1,080 1,770 1,110 2,150 860 560 198 61 32 24 18 17 391 980 830 1,220 1,700 1,010 486 189 65 32 25 19 16 641 950 772 1,220 1,860 1,040 427 184 61 33 26 SO 16 2,950 890 615 1,110 2,520 920 396 174 55 34 27 21 14 1,060 860 535 1,080 1,860 772 368 174 52 37 25 22 12 578 630 630 1,040 1,600 723 S60 169 52 38 24 29 13 644 800 490 980 5,410 696 360 164 52 37 24 24 14 590 772 445 1,040 4,480 696 368 156 50 31 25 25 16 419 745 414 1,010 2,720 701 384 149 50 27 27 26 16 322 734 396 950 1,860 655 388 144 49 28 28 27 16 260 728 368 860 1,460 600 364 138 49 28 30 KOOft 12 220 706 364 830 1,290 610 372 135 49 32 47 29 13 188 690 348 _ 1,140 595 364 127 47 34 38 30 16 168 454 328 _ 1,010 542 344 120 47 32 32 31 18 - 288 1,110 - 920 - 324 - 47 31 - Seoond- Run-off In Month foot-daya Maximum IH«4mriy»i Mean acre-feet 535 26 12 17 3 1,060 2,950 18 363 21,610 44^735 12 XOO 101 1,443 88 730 112,005.0 12,100 6 307 222,200 13 923 1,770 235 449 27,620 56)330 5*980 830 2 012 111,700 5,410 920 1 973 121,300 April ...... 24^240 1,290 542 808 48,080 Ma7...... 13,673 655 324 441 27 120 6,667 316 120 13,220 July...... 2,276 122 47 73.4 4,510 1,100 47 27 35.5 2 180 812 47 22 27.1 l)610 Water year 1937-38...... 236,348 12,100 12 648 468,700 Peak discharge.- Dec. 10 (11.30 p. 20,800 sec.-ft.; Feb. 9 (3 p.m.) 9,120 sec.-ft. ; Feb. 13 (4 p.m.) 7,490 see.-ft. 3UTTE CREEK BASIN Butte Creek near Chico, Calif. Location.- Water-stage recorder, lat. 39°44', long. 121°42', in sec. 25, T. 22 N., R. 2 E., half a mile downstream from confluence with Little Butte Creek and 7-i miles east of Chico. Altitude, about 350 feet. Drainage area.- 148 square miles. Records available.- November 1930 to September 1938. Extremes.- Maximum discharge during year, 17,000 second-feet Dec. 11 (gage height, 18.9 feet), from rating curve extended above 6,000 second-feet on basis of logarithmic extension of rating at cable gage; minimum, 50 second-feet (regulated) Aug. 22. 1950-38: Maximum discharge, that of Dec. 11, 1937; minimum recorded, 36 second- feet some time in September 1931. Remarks.- Records good. Butte Creek receives considerable water above station from West Branch of Feather River by way of De Sabla and Centerville power plants. Pacific Gas & Electric Co., has furnished the following record of this flow for 1937-38: Mean discharge Run -off Month in second-feet in acre -feet October. .... 37.1 2,280 November.... 55.7 3,310 December. . . . 75.1 4,620 January. .... 79. 4 4,880 February. . . . 71.7 3,980 "p August...... 55.9 3,440 September. . . 26.9 1,600 The year. . 57.4 41,500 Discharge, in second-feet, water year October 193V to September 1938 Day Oct. HOT. Dec. Jan. F«b. Mar. Apr. May June July Aug. Sept. 1 94 121 287 375 1,710 1,590 996 1,140 685 282 193 127 2 197 116 267 400 3,550 2,360 974 1,100 670 277 176 127 3 192 110 233 408 2,760 1,750 953 1,000 680 274 163 127 4 117 110 262 389 1,790 1,390 1,240 995 690 269 161 127 B 123 112 246 364 1,510 1,170 1,510 988 662 282 163 127 6 114 112 227 354 1,870 1,100 1,140 960 602 282 156 127 7 117 117 246 332 2,000 1,060 1,030 939 624 256 142 117 8 110 114 235 332 4,450 1,100 1,030 925 602 232 161 105 9 92 110 273 338 4,650 1,000 1,100 1,000 580 225 163 105 10 89 117 6,210 294 5,150 918 1,140 1,010 556 235 142 103 11 112 318 11,200 305 3,850 918 1,100 1,030 532 235 139 103 12 114 264 3,930 305 2,620 3,350 1,100 1,140 478 230 150 102 13 99 197 2,260 317 2,580 3,550 1,030 1,310 413 235 156 103 14 140 234 1,550 302 2,180 2,220 995 1,430 384 248 148 103 IB 187 278 1,240 488 1,670 1,750 981 1,470 356 222 172 102 16 150 326 1,030 432 1,280 2,490 1,010 1,430 384 198 152 107 17 140 788 911 1,150 1,100 2,080 1,060 1.310 416 212 146 121 18 116 352 758 830 1,060 1,670 1,310 1,170 391 225 161 121 19 110 305 660 675 953 2,130 1,390 1,060 368 210 154 117 20 110 2,830 601 630 842 2,850 1,390 939 359 203 150 119 21 110 1,260 656 556 800 2,000 1,430 890 356 200 139 117 22 104 640 534 534 782 1,750 1,390 890 347 167 148 111 az 103 1,060 520 508 752 4,050 1,390 884 335 181 148 111 24 112 1,160 488 460 794 3,450 1,470 904 332 179 150 117 25 110 646 468 460 824 2,260 1,510 866 320 191 152 119 26 112 496 436 400 758 1,830 1,280 878 308 193 150 119 27 101 414 412 420 740 1,630 1,200 848 302 181 150 129 28 99 335 420 428 740 1,470 1,140 788 299 170 154 186 29 103 329 382 404 1,310 1,060 754 314 174 150 176 SO 108 319 375 382 _ 1,170 1,100 710 294 161 165 144 31 129 389 758 - 1,060 700 165 142 - Seoond- Month Run-off in foot-days Maximum Minimum Mean acre-feet October...... 3 714 197 89 120 7 370 November...... 13^590 2 830 110 453 26^960 December...... 37,706 11^200 227 1,216 74,790 Calendar year 1937...... 158,443 11,200 80 434 314,300 14,330 1,150 294 462 28,420 53,765 5,150 740 106,600 58 426 4,050 1,885 115,900 April...... 35^448 1,510 953 1 182 70,310 toy...... 31,458 1,470 700 i'oi5 62,400 13, 629 690 294 454 2Y 030 July...... 6,794 161 219 13^480 4,796 193 1.39 155 9,510 3,619 186 102 121 7 * 180 Water year 1937-38...... 277,275 11,200 89 760 550,000 Peak discharge.- Dec. 11 (1:30 a.m.) 17,000 sec.-ft.j Feb. 9 (7 p.m.) 6,470 sec.-ft.; Mar. 23 (7s3o p.m.) 6,§60 sec.-ft. 281 FEATHER RIVER MS IN Lake AT manor near Prattville, Calif. Location.- Staff gage, lat. 40°10'30", long. 121°05'25", in NWi sec. 28, T. 27 N., R. 8 E., at outlet tower at dam on North Fork of Feather River, 5 miles southeast of Prattville. Records available.- October 1930 to September 1938. Remarks.- Lake Almanor on North Fork of Feather River is main storage unit of Feather River system of Pacific Gas & Electric Co. Elevation of crest of dam is 4,515 feet above mean sea level. Water is diverted by tunnel to Butt Valley Reservoir, and a small amount is released at Almanor Dam down natural channel of North Fork of Feather River. (See records for North Fork of Feather River near Prattville. ) On Sept. 30, 1937, storage In Butt Valley Reservoir was 14,569 acre-feet; on Sept. 30, 1938, it was 47,493 acre-feet. Table of contents, furnished by Pacific Gas & Electric Co., shows amount available for release at dam; storage above 15,660 acre- feet may be diverted through tunnel to Butt Valley Reservoir. cre-feet, water ye October 193V to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 414,966 372,863 364,126 382,388 403,872 328,620 364,467 381,518 480,301 511,097 518,394 474,783 a 415,686 370,971 363,615 382,214 406,546 325,203 363,515 384,305 482,785 510,311 517,998 472,507 a 415,326 368,911 362,935 383,085 409.047 321,476 363,275 387,101 484,891 510,115 517,603 470,993 4 414,067 366,686 362,254 384,131 410,300 319,054 363,615 389,028 486,041 510,508 516,615 469,859 5 412,990 364,637 361,575 385,003 408,511 316,639 364,126 390,608 487,001 511,294 515,628 468,726 6 412,093 362,594 360,726 385,178 406,725 314,873 363,445 392,366 487,769 513,459 514,641 467,217 7 411,375 360,556 359,539 385,178 405,298 313,911 362,935 394,480 488,730 515,430 513,656 465,899 8 410,300 358,354 358,185 385,527 404,050 313,751 362,084 396,599 491,041 516,615 512,474 464,582 9 409 , 047 355,820 359,370 385,003 403,338 313,591 361,914 399,431 493, 357 516,022 511,097 463,642 10 407,439 354,304 373,035 382,562 402,271 313,591 362,254 402,983 495,679 518,394 509,526 462,891 11 405,832 354,978 401,028 380,475 401,206 314,231 362,424 407,082 498,200 519,977 507,956 461,204 18 404,407 354,641 416,406 378,566 399,431 316,478 362,764 411,734 499,949 519,779 506,585 459,331 13 402,805 353,967 422,001 377,353 397,130 318,731 363,275 416,406 501,507 519,581 504,824 457,089 14 401,383 353,631 424,900 377,007 394,833 319,860 363,786 422,182 502,871 519,383 503,652 455,039 16 401,206 352,622 427,261 378,046 392,366 322,770 362,764 428,170 504,238 519,383 502,091 452,806 16 400,673 354,304 427,988 378,393 389,554 326,666 361,914 432,909 505,802 520,176 500,533 450,578 17 400,141 355,146 425,444 379,086 386,226 328,620 361,235 438,953 507,564 521,960 499,366 448,725 18 399,077 355,146 422,182 379,433 382,214 330,416 361,575 443,920 507,760 523,151 498,006 446,874 19 397,307 356,326 418,929 380,649 376,661 333,691 362,424 447,984 507,760 522,953 496,841 444,474 20 395,363 360,728 415,686 381,866 371,830 338,465 362,935 450,949 508,545 522,953 495,679 442,446 21 393,599 362,764 411,913 383,433 366,857 342,271 363,786 453,178 509,919 522,754 494,517 440,238 22 392,014 363,615 408,690 385,353 362,254 346,763 365,661 455,225 510,901 522,357 493,164 437,668 23 390,432 366,002 405,298 386,751 357,340 352,790 367,541 457,463 511,491 521,960 491,041 435,469 24 388,327 367,199 402,094 387,801 352,454 357,509 369,768 460,080 511,491 521,563 489,115 434,189 25 386,576 367,370 398,546 388,853 347,264 361,235 371,486 463,455 511,491 520,572 487,577 432,909 26 384,480 367 . 199 395,539 389,905 341,940 363,786 373,208 466,840 511,491 519,779 486,232 430,719 27 382,388 366,515 393,070 391,135 336,651 365,320 374,415 469,481 511,491 519,977 484,316 429,808 28 380,301 365,832 388,327 393,070 332,052 366,515 375,278 471,182 511,884 519,977 482,785 430,719 29 378,393 364,979 385,527 394,657 _ 366,515 376,315 473,834 511,884 519,581 480,874 431,814 30 376,661 364,637 382,562 396,599 _ 366,002 378,393 475,922 511,491 518,987 479,15-) 432,361 31 374,760 382,040 400,496 - 365,320 478,014 - 519,185 477,063 - North Fork of Feather River near Prattville, Calif. Location.- Water-stage recorder and rectangular concrete weir, lat. 40°10', long, 121°06', In SWi sec. 28, T. 27 N., R. 8 E., half a mile downstream from Almanor Dam, 5 miles southeast of Prattville, and about 9 miles upstream from Butt Creek. Altitude, about 4,380 feet. Drainage area.- 507 square miles. Records available.- March 1914 to September 1938 (tables of daily discharge include water diverted through Butt Creek tunnel no. 1, May 1921 to September 1936). June 1905 to March 1914 at site near that of Almanor Dam. Average discharge.- 32 years (1905-10, 1911-38), 878 second-feet, including diversion through Butt Creek tunnel no. 1. Extremes.- Maximum discharge during year, 2,560 second-feet Dec. 23 (gage height, 7.20 feet); minimum, 1.8 second-feet Oct. 7, 8, and parts of Oct. 6 and 9. Extremes do not include diversions through Butt Creek tunnel no. 1. 1905-38: Maximum discharge, 10,000 second-feet Mar. 19, 1907, before construction of dam (gage height, 16.2 feet, at former site), from rating curve extended above 3,700 second-feet; no flow (regulated) Apr. 15, 16, 1914. at times during period January to April 1919, and on Apr. 21, 1923. Remarks.- Records good except tnose for periods of missing gage heights, Feb. 5-13, 15-21, Mar. 23-27, Sept. 3-5, which were computed from record of releases at Almanor Dam and are fair. Gage-height record and results of three discharge measurements furnished by Pacific Gas & Electric Co. For storage record see description for Lake Almanor at Prattville. Tables of daily discharge show releases from Lake Almanor down North Fork of Feather River. Water diverted for power from Lake Almanor through Butt Creek tunnel no. 1 to Butt Creek. 282 FEATHER RIVER BASIN Discharge, In second-feet, of Hortli Pork of Feather River near Prattville, Calif., water year October 1937 to September 1938 Day Mar- Apr. May June July Aug. Sept. 2.5 545 552 2,420 679 2,380 2,460 779 758 2.5 543 552 2,420 674 2,380 2,460 660 512 2.5 543 552 128 1,610 674 2,380 2,490 264 200 2.5 538 552 518 940 674 2,380 2,460 182 100 2.5 538 552 1,810 940 674 2,380 2,490 58 200 2.0 538 552 2,490 940 674 2,380 2,490 31 403 1.8 534 552 2,490 518 882 2,380 2,240 31 244 286 1.8 534 343 552 2,490 32 1,460 2,280 1,690 52 272 286 36 534 155 552 2,490 32 1,660 3,180 1,070 103 254 286 120 450 30 552 2,490 1,660 1,960 655 103 312 188 279 ' 31 31 552 2,490 1,660 1,900 650 103 346 230 584 31 190 552 2,490 1,660 1,620 650 87 346 607 372 31 1,560 234 2,490 1,660 1,620 650 36 343 698 144 31 1,930 2,490 1,720 1,660 650 36 343 855 31 1,960 2,490 2,350 1,660 451 324 728 30 2,490 2,460 1,660 292 674 13 2,490 2,460 1,720 292 530 307 2.5 2,490 2,460 1,900 631 292 589 369 2,490 2,460 2,040 546 800 365 2,490 2,460 2,460 241 464 365 2,490 2,460 2,460 267 292 365 2,490 2,490 2,490 2,460 451 324 365 2,490 2,490 2,460 491 556 2,420 2,460 2,460 679 303 !,520 2,420 2,460 2,460 679 396 474 2,420 2,460 2,460 650 512 655 508 2.5 !,490 2,420 2,460 2,460 459 336 437 443 2.5 1,490 2,420 97 2,420 2,460 565 425 111 440 2.5 1,490 479 2,420 2,460 674 674 111 440 2,070 679 2,380 2,460 674 111 462 1,040 679 2,460 713 Adjusted for Diversions diversion (acre-feet) Second- Run-off In Run-off In foot-days .cre-feet acre-feet October 1936. 2,804 670 5,560 49,220 891 54,780 November..... 358.9 23 12.0 712 48,390 825 49,100 December..... 105.6 4.0 3.41 209 41,740 682 41.960 Calendar year 1936 January 1937. 990.5 402 3.2 32.0 1,960 41, 705 , February..... 118.0 5.5 4.0 4.21 234 1, 28.1 1,560 March...... 112.0 4.0 3.6 3.61 222 1, 30.1 1,850 April...... 135.5 7 3.6 4.52 269 21, 372 22,130 May...... 1S2.9 4.0 3.8 3.96 244 29, 478 29,370 June...... 109.9 3.8 3.6 3.66 218 25, 430 25,590 July...... 4,807.4 510 3.6 155 9,540 54, 1,043 64,140 August...... 115.2 4.0 3.6 3.72 228 36, 594 36,530 September.... 94.9 3.6 2.9 3.16 188 57 967 57.550 Water year 1936-37 670 27.1 19,580 408,300 591 427,800 October 1937. 7,158.1 584 231 14,200 59,250 1,195 73,450 November..... 5,528.2 543 2.5 184 10,970 60,470 1,201 71,440 December..... 43,952.5 2,560 2.5 1,418 87,180 49,560 2,223 136,700 Calendar year 1937 2,560 1.6 173 125,500 438,200 778 563,600 January 1938. 7,642 552 43 247 15,160 23,790 633 38,950 February..... 59,464 2,490 44 2,124 117,900 20,280 2,488 138,200 March...... 12,408 2,420 32 400 24,610 47,300 1,170 71,910 April...... 55,561 2,490 674 1,852 110,200 40,440 2,531 150,600 May...... 68,360 2,460 ,620 2,206 135,600 3.720 2,265 139,300 June...... 31,861 2,490 241 1,062 63,200 41,530 1,760 104,700 July...... 3,138 779 31 101 6,220 44,060 818 50,280 August...... 10,290 713 37 332 20,410 57,450 1,266 77,860 September.... 13,730 855 100 458 27,230 50,440 1,305 77,670 Water year 1937-38 319,112.8 2,560 1.6 874 632,900 498,300 1,562 1,131,000 ^Diversion through Butt Creek tunnel Ho. 1, which was computed as the difference In flow between Butt Creek below tunnel No. 1 (unpublished records) and Butt Creek above tunnel No. 1 (published records). There is some unmeasured Inflow between the two stations. Note.- Figures of mean monthly discharge adjusted for diversion for water year 1936-37 supersede tnose published In Water-Supply Paper 831; other figures republlshed to complete the table. FEATHER RIVER BASIN 283 North Fork of Feather River at Big Bar, Calif. Location.- Water-stage recorder, lat. 39°48', long. 121°27', in SWi sec. 32, T. 23 N., R. b E., a quarter of a mile upstream from Big Bar. Zero of gage is 1,331.51 feet (revised) above mean sea level. Drainage area.- 1,934 square miles. Records available.- February 1911 to August 1930, October 1931 to September 1937. Average discharger- 23 years (1911-12, 1913-20, 1921-30, 1931-37) 2,479 second-feet, extremes.- Maximum discharge during year ending Sept. 30, 1938, 83,000 second-feet, Dec. 11 (gage height, 30.2 feet, from floodmarks),from slope-area computation. 1911-30; 1931-38: Maximum discharge, that of Dec. 11, 1937; minimum dally discharge to Sept. 30, 1937, 235 second-feet Oct. 31, 1932. Remarks.- No record obtained during year ending Sept. 30, 1938,except peak stage; gage- helght record destroyed with station on Dec. 11, 1937. Feather River near Oroville, Calif. Location.- Water-stage recorder, lat. 39°32', long. 121°29', in NEi sec. 2, T. 19 N., R. 4 E., 2 miles downstream from Junction of North and Middle Forks and 3 miles northeast of Oroville. Zero of gage Is 182.02 feet above mean sea level (general adjustment of 1929). Drainage area.- 3,611 square miles. Kecoras available.- October 1934 to September 1938. January 1902 to September 1934 at site at oroviiie, t> miles downstream (records equivalent). Average d1scharge.- 36 years, 6,009 second-feet. Jiactremes.- Maximum discharge during year, 185,000 second-feet Dec. 11 (gage height, 73.6 reet, from floodmarks), from rating curve extended above 62,000 second-feet on basis of velocity-area and Ara studies and verified by slope-area computation; minimum, 895 second-feet Oct. 9 (gage height, 5.08 feet). 1902-38: Maximum discharge, 230,000 second-feet Mar. 19, 1907 (gage height, 30.2 feet, former site and datum), from rating curve for high-water measuring section extend ed above 62,000 second-feet on basis of velocity-area and AtfT studies and verified by slope-area computation of flood of Dec. 11, 1937; minimum (estimated), 300 second-feet, regulated, Nov. 9, 1931 (gage height, -1.7 feet, former site and datum). Remarks.- Records excellent except those for periods of missing gage heights, Dec. 10-15 ana Feb. 15-18, which were computed on basis of records for other stations on Feather River and are fair. Lake Almanor, Bucks, Butt Valley, other storage reservoirs, and three large power plants above station; also small diversions. Discharge, In aecond-feet, water year October 1937 to September 1933 Day Oct. HOY. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1,640 2,190 3,930 5,180 11,700 14,400 14,200 27,600 19,900 6,120 2,340 2,490 2 1,640 2,490 3,690 5,500 18,200 22,100 13,800 27,400 19,700 5,700 2,390 2,640 3 1,840 2,440 3,510 5,640 17,400 22,400 14,100 24,800 19,600 5,380 2,340 2,140 4 1,840 2,440 3,330 4,980 13,000 17,000 16,300 23,000 19,600 4,860 2,340 1,840 6 1,740 2,440 3,150 4,790 12,400 14,500 19,200 22,400 18,800 4,460 2,340 1,690 6 1,890 2,340 3,210 4,600 14,100 13,600 16,900 22,000 18,400 3,800 2,240 2,190 7 1,840 2,190 3,210 4,460 13,900 13,000 15,600 21,500 17,500 3,560 2,140 2,240 8 1,640 2,290 3,150 4,280 24,000 12,100 16,100 21,500 16,300 3,620 2,340 2,240 9 1,640 2,390 3,570 3,860 24,800 11,600 17,800 23,000 15,600 3,320 2,490 2,140 10 1,690 2,440 77,800 3,920 27,400 11,100 19,400 23,600 13,900 3,080 2,490 2,040 11 1,990 2,860 145,000 3,800 26,200 11,100 20,600 24,800 12,500 2,860 2,440 1,840 12 1,840 2,980 63,400 3,680 19,400 20,300 21,300 26,500 11,100 3,560 2,490 2,340 13 2,240 2,390 35,200 3,680 19,700 34,700 20,600 30,800 10,700 3,620 2,440 2,540 14 2,340 2,700 24,400 3,200 18,800 25,700 19,600 35,800 10,800 3,440 2,240 2,640 16 2,540 3,620 17,100 5,050 16,000 20,300 19,600 37,100 10,600 3,320 2,440 2,700 16 2,090 3,030 14,800 4,860 13,500 23,200 20,400 35,800 10,200 3,200 2,490 2,700 17 1,740 10,300 13,300 10,200 11,500 22,700 22,100 33,100 9,610 2,390 2,440 2,440 18 1,890 5,570 12,100 9,340 11,500 18,800 26,900 29,300 8,480 2,490 2,340 2,190 19 2,140 4,400 11,000 8,080 11,200 22,000 33,500 25,300 7,680 2,980 2,340 2,540 20 2,240 20,600 10,200 7,200 10,500 39,300 36,600 23,000 7,120 3,080 2,240 2,700 21 2,290 14,700 9,970 6,190 10,200 30,800 39,900 21,700 7,360 2,920 2,140 2,640 22 2,240 7,010 9,700 5,770 10,100 24,200 39,100 21,500 7,440 2,860 2,290 2,640 23 2,090 11,100 9,160 5,640 10,200 37,100 37,500 22,200 7,280 2,760 2,490 2,640 24 1,840 11,400 8,720 5,310 10,200 44,500 37,500 23,000 7,520 2,540 2,640 2,040 25 2,240 7,2^0 8,400 4,860 10,500 31,700 36,400 23,000 7,040 2,540 2,640 2,040 26 2,390 5,610 8,080 4,660 10,600 25,000 30,600 23,600 6,400 2,590 2,540 2,240 27 2,390 5,070 7,840 4,530 10,500 20,400 27,600 23,000 5,980 2,590 2,140 2,490 28 2,340 4,050 7,680 4,720 10,600 19,000 26,100 21,700 5,770 2,590 1,740 2,240 29 2,340 3,930 7,440 4,460 _ 17,600 26,100 21,300 6,190 2,540 2,340 1,940 50 2,190 4,110 7,280 4,100 _ 16,300 27,900 20,400 6,260 2,390 2,590 1,940 31 2,190 - 6,190 5,950 - 15,000 20,000 2,190 2,590 - Seoond- Run-off In Month f cot-days Maximum Minimum Mean acre-feet 63,190 2,540 1,640 2,038 125,300 156,370 20,600 2,190 5,212 310,200 545,510 145,000 3,150 17,600 1,082,000 2,053,030 145,000 895 5,625 4,072,000 162,490 10,200 3,200 5,242 322,300 418,100 27,400 10,100 14,930 829,300 671,500 44,500 11,100 21,660 1,332,000 April ...... 733,300 39,900 13,800 24,440 1,454,000 May...... 779,700 37,100 20,000 25,150 1,547,000 345,330 19,900 5,770 11,510 685,000 July...... 103,350 6,120 2,190 3,334 205,000 73,490 2,640 1,740 2,371 145,800 69,130 2,700 1,690 2,304 137,100 Water year 1937-! o 4,121,460 145,000 1,640 11,290 8,175,000 Peak discharge.- Dec. 10 (about 8 p.m.) 172,000 sec.-ft.} Dee. 11 (about 6 a.m.) 185,000 sec.-ft. ) Mar. 24 (12:30 a.m.) 55,200 sec.-ft. 284 FEATHER RIVER BASIN Feather River at Nlcolaus, Calif. Location.- Water-stage recorder, lat. 38°54'00", long. 121°35'05", 0.4 mile downstream from highway bridge at Nicolaus, Sutter County. Gage set to datum of Corps of Engineers, U. S. Army. Records available.- June 1921 to October 1938 (for low-water periods only) In reports of Geological Survey. 1920-21 and 1926-38 (gage heights for high-water periods) in reports of Division of Water Resources of Department of Public Works, State of California. Extremes.- Minimum discharge during period July to October 1938, 735 second-feet Sept. 7 (gage height, 22.25 feet). 1921-38: No flow Aug. 2-18, 1924, July 11-22, 24, 26,Aug. 1, 1931. Remarks.- Records good. Western, Sutter Butte, and other canals divert a large amount of water above station. Many reservoirs and power plants upstream. Discharge, in second-feet, 1937-38 Day Oct. July Aug. Sept. Oct. 1 1,440 8,060 1,620 l,46o| 2,040 2 1,480 8,060 1,460 1, 420 2,040 a 1,620 7,580 1,560 1, 500 2,040 4 1,980 6,820 1,540 1, 260 2,260 5 1,800 5,980 1,500 1,060 2,440 6 1,840 5,280 1,420 843 2,260 7 1,890 4,500 1,380 772 2,080 8 1,890 4,140 1,310 1, 080 2,040 9 1,890 4,020 1,240 1, 160 2,080 10 1,760 3,660 1,420 1,120 2,040 11 1,710 3,340 1,460 1, 050 2,040 12 1,890 3,140 1,420 945 2,260 13 1,940 3,340 1,420 896 2,310 14 2,070 3,340 1,420 1, 360 2,310 16 2,450 3,240 1,340 1, 560 2,360 16 2,750 3,140 1,280 1,680 2,540 17 2,450 3,040 1,380 1, 720 2,780 18 2,200 2,560 1,380 1, 640 2,680 19 2,070 2,160 1,340 1, 480 2,780 20 2,250 2,340 1,340 1,520 2,780 21 2,400 2,380 1,280 1,900 2,580 22 2,450 2,340 1,170 1, 300 2,680 23 a, 450 2,160 1,140 2. 000 2,440 24 2,350 2,060 1,280 2, 080 2,000 25 2,160 1,900 1,380 1,820 2,080 26 2,200 1,820 1,460 1,560 2,680 27 2,350 1,820 1,460 1, 820 2,780 28 2,30O 1,620 1,310 2, 360 2,680 29 2,350 1,820 1,030 2, 400 2,680 30 2,350 1,820 928 2, 040 3,080 31 2,300 1,740 1,340 - 3,700 Second- Month Minimum Mean Run-off In foot-dtya Maximum acre-feet 1937 October...... 65,030 2,750 1,440 2,098 129,000 1938 July...... 109,420 8*060 1,740 3,530 217,000 42,028 1,620 928 1,356 83,360 45,426 2,400 772 1,514 90,100 2 000 2 437 75,640 3,700 * * 149,800 The peri 3d ...... 540,300 FEATHER RIVER BASIN 285 Indian Creek near Crescent Mills, Calif. Location.- Water-stage recorder, lat. 40°05', long. 120°56', in SWi sec. 25, T. 25 N., R. 9 E1 ., 0.8 mile upstream from Dixie Creek and about 14 miles downstream from village of Crescent Mills. Altitude, about 3,500 feet. Drainage area.- 746 square miles. Records available.- October 1930 to September 1938. January 1906 to December 1909 and September 1911 to March 1918 at site 500 feet upstream. Average discharge.- 17 years (1906-9, 1911-17, 1930-38), 539 second-feet. Extremes.- Maximum discharge during year, 11,500 second-feet Dec. 12 (gage height, 15.00 feet), from rating curve extended above 5,500 second-feet on basis of velocity- area studies; minimum, 7 second-feet Oct. 1. 1906-9, 1911-18, 1930-38: Maximum discharge, about 11,700 second-feet Mar. 19, 1907 (gage height, 20.2 feet, from floodmark, former site and datum), from rating curve extended above 3,200 second-feet; minimum, 1.7 second-feet Aug. 25, 1931. Remarks.- Records good. Diversions for irrigation in Indian and Genesee Valleys. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Pet. Mar. Apr. May June July Aug. Sept. 1 7 33 195 330 670 1,210 1,490 6,450 2,260 406 87 26 2 10 33 180 344 910 2,100 1,490 6,210 2,180 394 70 26 3 15 33 169 379 1,210 3,070 1,520 5,490 2,100 370 63 26 4 14 33 160 367 1,060 2,350 1,740 4,720 2,020 344 57 25 6 14 34 148 338 800 1,780 2,350 4,610 1,900 325 52 25 6 18 34 140 304 800 1,520 2,220 4,500 1,820 307 44 24 7 18 36 134 276 910 1,380 2,020 4,390 1,700 288 41 24 8 IS 36 131 259 1,150 1,280 2,060 4,280 1,560 271 38 25 9 19 35 139 256 1,280 1,240 2,620 4,500 1,460 250 34 25 10 19 34 789 262 1,740 1,210 3,570 4,830 1,350 236 32 26 11 19 64 6,970 243 1,940 1,180 4,070 4,940 1,240 223 32 25 12 19 82 10,600 241 1,560 1,560 4,500 5,050 1,150 214 33 26 13 20 66 6,450 246 1,210 3,470 4,500 5,490 1,090 204 32 26 14 29 76 3,170 245 940 3,770 4,070 6,090 1,030 202 31 25 16 49 81 2,060 379 828 2,710 3,970 6,570 970 210 32 24 16 45 114 1,560 418 720 2,620 4,170 6,570 855 200 31 24 17 39 357 1,240 520 600 2,980 4,720 6,090 800 196 28 24 18 35 354 1,030 720 560 2,350 5,730 5,270 720 202 28 24 19 34 258 855 670 520 2,020 7,410 4,390 670 180 27 24 20 36 454 695 580 520 2,890 8,130 3,670 622 166 26 26 21 32 980 600 502 502 3,570 8,640 3,270 600 156 26 26 22 31 860 520 468 502 2,890 8,640 3,070 600 142 26 26 S3 31 752 502 468 502 2,890 8,130 2,980 600 127 26 26 24 30 860 434 415 540 3,770 7,890 2,980 560 119 26 26 25 29 729 418 397 645 3,270 7,410 3,070 520 112 29 26 26 29 530 391 388 745 2,530 6,330 3,070 485 87 29 26 27 29 382 367 376 855 2,140 5,490 3,070 468 91 28 28 28 29 300 350 373 910 1,980 5,490 2,980 434 100 27 30 29 31 254 327 367 H 1,940 5,730 2,980 418 92 26 34 50 31 215 322 350 _ 1,780 6,090 2,620 418 84 26 36 31 32 - 330 418 - 1,600 - 2,440 - 87 26 - Second- Run-off In Month foot-days Maximum V Q-t -t O.L.L 49 7 26.2 1,610 8 109 QAO 33 270 16,080 41 ) 376 10,600 131 1,335 82,070 162,777.2 10,600 3.5 446 322,900 11,888 720 241 383 23,680 25,129 1,940 502 897 49,840 Karch...... 71,050 3,770 1,180 2,292 140,900 April...... 142,190 8,640 1,490 4,740 282,000 May...... 136,640 6,670 2,440 4,408 271,000 32,600 2,260 418 1,087 64,660 July...... 6,585 406 84 206 12,660 1,113 87 26 35.9 2,210 782 36 24 26.1 1,650 Water year 1937-38...... 478,073 10,600 7 1,310 948,200 Peak discharge.- Dec. 12 (3 a.m.) 11,500 aec.-ft.; Apr. 21 (6 p.m.) 9,030 sec.-ft.; Apr. 22 (3 p.m.} 8,640 aec.-ft. 286 FEATHER RIVER BASIN Spanish Creek at Keddie, Calif. Location.- Water-stage recorder, lat. 40°00'05", long. 120°57'20", In NEi sec. 27, T. 25 N., R. 9 E., 200 feet upstream from Blackhawk Creek and 0.9 mile southeast of Keddie. Altitude, about 3,250 feet. Drainage area.- 184 square miles. Records available.- October 1933 to September 1938. October 1911 to September 1933 at site 1.2 miles downstream. Average discharge.- 20 years (1911-19, 1921-33), at former site, 230 second-feet. Extremes.- Maximum discharge during year, 11,500 second-feet Dec. 11 (gage height, 12.43 feet), from rating curve extended above 5,000 second-feet on basis of AV3" study; mini mum, 18 second-feet Oct. 1. 1911-38: Maximum discharge, that of Dec. 11, 1937; minimum, 3.8 second-feet Aug. 12, 1934. Remarks.- Records good except those for periods of missing gage heights, Oct. 14 to Nov. 5, Nov. 7-11, 13-16, which were computed on basis of partial recorder graph and rec ords for stations on nearby streams and are fair. Water diverted above station for Irrigation In American Valley. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 19 40 140 176 655 1,150 719 1,420 906 173 64 29 2 25 40 129 205 967 2,340 740 1,310 S90 173 62 26 S 54 40 121 208 911 1,740 842 1,140 882 162 62 28 4 47 40 117 187 532 1,080 1,010 1,100 850 150 61 29 6 55 40 111 176 435 820 1,180 1,100 818 148 60 30 6 46 42 106 168 475 724 930 1,090 789 132 57 32 7 40 42 102 158 543 673 S66 1,090 740 128 57 32 3 37 40 99 153 1,200 661 962 1,170 719 123 57 33 9 36 40 108 149 1,310 667 1,220 1,300 664 114 56 35 10 35 40 4,600 146 1,940 637 1,320 1,380 598 112 56 38 11 34 80 9,610 146 1,310 661 1,320 1,420 550 110 54 36 12 34 88 3,370 144 799 1,850 1,310 1,560 510 106 53 36 13 34 80 1,460 142 619 3,040 1,170 1,790 455 102 52 38 14 40 75 865 142 532 1,600 ,100 2,040 435 102 52 39 16 70 80 649 374 485 1,150 ,100 2,090 420 98 50 36 16 65 140 505 305 426 1,690 ,200 1,940 400 92 47 35 17 60 545 420 813 374 1,420 ,420 1,740 382 90 45 37 18 55 237 361 757 357 1,050 ,990 1,460 342 88 45 37 19 55 173 321 532 337 1,240 2,190 1,260 314 80 44 38 20 50 1,190 281 401 317 2,760 2,190 1,100 294 82 42 37 21 50 845 255 337 309 1,790 2,290 1,030 319 78 42 38 22 45 330 255 341 321 1,270 2,090 1,040 294 74 41 37 23 45 609 266 341 329 2,280 1,990 1,110 278 72 37 38 24 40 736 238 289 383 2,710 1,940 1,160 256 72 35 39 25 40 414 228 266 465 1,600 1,790 1,160 238 68 33 39 26 40 291 208 248 470 1,220 1,510 1,190 221 67 33 41 27 40 234 193 241 475 1,090 1,420 1,130 210 69 32 46 28 40 193 190 245 485 1,040 1,380 1,120 197 67 29 52 29 40 168 181 234 946 1,420 1,020 191 66 30 51 30 40 151 181 214 810 1,560 954 179 64 30 49 31 40 lei 440 747 930 67 32 Second- Run-off In Month foot -days Maximum Minimum Mean aore-feet Dot 1,351 70 19 43.6 2,680 HOT 7,063 1,190 40 235 14, 010 Dee 25,851 9,610 99 834 51,270 C 93,235 9,610 11 255 184,900 Jan uary 8,678 813 142 280 17,210 Feb 17,760 1,940 309 634 35,230 Mar 42, 456 3,040 637 1,370 84, 210 Apr 42, 169 2,290 719 1,406 83,640 May 40,344 2,090 930 1,301 80,020 Jun 14,341 906 179 478 28,440 Jul 3,129 173 64 101 6,210 Aug 1,450 64 29 46.8 2,880 Sep 1,111 52 26 37.0 2,200 Water year 1937-3 205,703 9,610 19 564 408,000 Peak discharge. - Dec. 10 (8 p.a.) 11,200 sec. -ft. j Dec. 11 (11 a.m.) 11,500 sec. -ft.; Mar. 23 (12' p.m.) 3,960 sec. -ft. FEATHER RIVER BASIN 287 Bucks Creek storage reservoir near Bucke ranch, Calif. Location.- Water-stage recorder, lat. 39°54', long. 121°12', in NWi sec. 33, T. 24 N., R- 7 E., at dam on .Bucks Creek 2 miles northwest of former Bucks ranch and 15 miles west of Quincy. Drainage, area.- 28 square miles. Records available.- October 1928 to September 1938. Remarks.- This reservoir is main storage unit of Grizzly Creek project of Pacific Gas & Electric Co. Elevation of crest of dam is 5,168 above mean sea level; that of spillway is 5,154,85 feet. Released water flows down Bucks Creek to diversion dam, where it enters tunnel that later discharges it into Grizzly Creek. Record furnished by Pacific Gas & Electric Co. shows total contents of reservoir, of which 274 acre- feet is not available for release. Contents, In acre-feet, water year October 1937 to September 1938 Day Oct. Nov. Dso. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 86,851 72,621 74, 089 88,665 87, 885 82,832 77,881 75,155 102,201 105, 051 102,293 94,898 2 86,420 72,216 74, 008 88,406 88.145 82,832 77,465 75,319 102,934 104,867 102,201 94,543 3 85, 989 71,730 74, 170 88, 145 88, 406 82,747 77,217 75,566 103,668 104, 682 102,017 94,277 4 85, 561 71,244 74,252 87,885 88,579 82,577 77,052 75, 894 104,313 104, 590 101,835 94,012 6 85, 133 70,920 74, 416 87,626 88,579 82.239 76,886 76,390 104,590 104,497 101,562 93,658 6 84,705 70,437 74,252 87,454 88,579 81,987 76, 556 76,886 104,774 104,405 101, 289 93,481 7 84,277 69,955 74,252 87.195 88,579 81,648 76,225 77,632 104,867 104,220 101,016 93,304 8 83,767 69,392 74,089 S6,764 88,665 81,311 75,648 78,381 104,959 104, 128 100,742 93, 038 9 83, 257 68,833 73,926 86,248 88, 665 80,973 75,319 79,297 105,143 104,036 100, 469 92,676 10 82,662 68,594 76,886 85, 561 88,665 80,638 75,073 80,218 105,328 103,851 100, 287 92, 510 11 82,155 68, 434 84,962 84,876 88,579 80,302 74,991 81,227 105,420 103,759 100,014 92. 510 12 81,648 68,035 88,492 84,362 88, 579 80, 051 74, 662 82, 239 105,512 103,668 99,743 92,510 13 81,227 67,795 90,755 84, 192 88, 579 79,967 74, 416 83,852 105,420 103,576 99,472 92, 510 14 80,889 68,114 91,983 84, 533 88, 579 79,800 74,170 84,876 105, 420 103,484 99,201 92,510 15 80, 554 68,274 92,071 84,791 88, 492 79,716 73,926 86, 678 105,420 103,392 99,020 92, 510 16 80,218 68,434 91,983 85, 218 88, 406 79, 632 73,681 88,145 105,420 103,300 98,839 92, 247 17 79, 800 68, 674 91,807 85,733 88,406 79,548 73,518 89,360 105,420 103,209 98,588 92,071 18 79,297 68,913 91,456 85,818 88,319 79,297 73,518 90,406 105, 328 103,118 98,387 91,719 19 78,880 69,633 91,280 86,247 88,319 79,213 73, 518 91,105 105,328 103,026 98,118 91,456 20 78,464 71,001 91,192 86,592 88,232 79,464 73,437 91, 456 105,236 103,026 97,849 91,192 21 78,048 71,487 90,843 86,764 87,885 79,548 73,600 92,159 105,420 102,934 97,669 90,843 22 77,632 71,973 90,494 86,937 85,903 79,548 73,763 92,862 105, 605 102,843 97, 400 90, 494 23 77,134 72,459 90 , 406 87,195 84,962 79,716 73,844 93,746 105,791 102,751 97,131 90,144 24 76,721 72,947 90,231 87,367 84,448 79,883 74, 089 94,631 105,605 102,751 96,861 89,882 26 76,307 73,273 90,057 87,281 84,107 79,800 74,334 95, 611 105,605 102,659 96,682 89,621 26 75,894 73,600 90,087 87,023 83,682 79,632 74, 498 96, 772 105,605 102, 568 96,413 89,533 27 75,483 73,763 89,970 87,023 83,172 79,297 74,662 97,669 105,605 102,568 96,324 89,359 28 74,827 73,763 89,621 87, 281 82,832 79, 047 74,827 98,659 105,420 102,476 95,967 89, 186 29 74,334 73,763 89,360 87,367 _ 78,797 74,909 99, 563 105,328 102,384 95,700 89, 099 30 73,844 73,763 89,186 87, 454 - 78, 464 74,991 100,469 105, 143 102, 384 95,433 89, 099 31 73,355 - 89,008 87,626 - 78,131 - 101,380 - 102, 293 95, 165 - 288 FEATHER RIVER BASIN Grizzly Creek near Storrie, Calif. Location.- Water-stage recorder, lat. 39°52', long. 121°14', in SWi gee. 5, T. 23 N., R. 7 E., about 2,000 feet upstream from outlet of tunnel from Bucks Creek and 6 miles southeast of Storrie. Altitude, about 4,900 feet. Records available.- December 1929 to September 1932, October 1933 to September 1938. Extremes.- Maximum discharge during year, 1,570 second-feet Dec. 10 (gage height, 7.20 feet), from rating curve extended above 150 second-feet on basis of velocity-area studies; minimum not recorded. 1929-32; 1933-38: Maximum discharge, that of Dec. 10, 1937; minimum, 0.1 second- foot Sept. 7-14, 1932. Remarks.- Records good except those for periods of ice effect, Feb. 1 to Mar. 3, and of missing gage heights, Mar. 4 to May 20, Aug. 15 to Sept. 30 (computed on basis of un published records at Grizzly Creek diversion dam), and those for Jan. 3, 4 (inter polated), all of which are fair. No diversion or regulation above station. Gage- height record furnished by Pacific Gas & Electric Co. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Peb. Mar. Apr. May June July Aug. Sept. 1 0.8 1.8 17 7.5 190 36 3.1 2 2.7 1.6 15 14 190 34 3.0 S 1.8 1.5 14 12 206 32 3.1 4 1.5 1.4 14 11 198 30 3.0 e 1.4 1.3 13 10 200 27 2.9 6 1.3 1.4 13 9.5 196 23 2.8 7 1.3 1.6 12 9 192 20 2.8 8 1.3 1.5 12 8 190 18 2.7 9 1.4 1.5 106 8 181 16 2.7 10 1.4 1.7 1,090 8 165 14 2.6 200 11 1.5 12 569 7.5 138 14 2.5 12 1.5 8 167 8 127 12 2.3 13 1.6 5 84 8.5 130 12 2.1 14 7.5 31 58 10 133 13 2.1 IB 6.5 20 45 46 130 13 1.9 16 3.0 90 37 22 130 10 1.8 17 2.6 126 30 41 111 9 1.7 18 2.5 38 24 34 94 7 1.6 19 2.3 106 16 25 88 6.5 1.4 20 2.2 275 14 21 89 6 1.3 21 2.1 81 14 19 151 98 5 1.2 22 2.1 48 12 24 167 89 4.8 1.1 23 2.0 140 13 25 192 84 4.4 1.0 24 2.0 68 15 21 190 77 4.2 1.0 25 2.0 43 12 20 202 68 3 .9 1.0 26 2.0 33 12 20 204 58 3.7 1.0 27 S.O 26 9.5 20 170 50 3.7 1.0 28 1.9 22 9 20 177 44 3.6 .9 29 1.9 20 8.5 19 176 41 3.5 .9 50 2.0 18 8.5 19 183 39 3.3 .9 31 2.0 8 19 186 3.2 .9 Second- Month Maxljmm Kaa-ot t In foot-days Minimum Mean acre-feet Oct 68.1 7.5 0.8 2.20 135 NO'7 1,225.3 275 1.3 40.8 2,430 Dec ember...... 2,471.5 1,090 8 79.7 4,900 Calendar year 193 10,458.8 1,090 - 28.7 20,740 Jan 546.0 46 7.5 17.6 1,080 Peb 560 20 1,110 Mar 1,240 40 2,460 Apr 2,100 70 4,170 Hay 5,998 193 11,900 Jun 3,726 206 39 124 7,390 Jul 395.8 36 3.2 12.8 785 Aug 58.3 3.1 .9 1.88 116 Bep 27.0 .9 54 «ater year 1937-38...... 18,416.0 1,090 - 50.5 36,530 FEATHER RIVER BASIN 289 West Branch or Feather River near Yankee Hill, Calif. Location.- Water-stage recorder, lat, 39°42', long. 121°34', in SWi sec. 5, T. 21 H., R. 4 E., at highway bridge, 1.4 miles downstream from Concow Creek and 2 miles west of Yankee Hill. Altitude, about 1,100 feet. Drainage area.- 145 square miles. Records available.- September 1930 to September 1938. Extremes.- Maximum discharge during year, 21,400 second-feet Dec. II (gage height, 30.3 feet], from rating curve extended above 15,000 second-feet; minimum, 5.5 second-feet Oct. 9 and Aug. 12. 1930-38: Maximum discharge, that of Dec. 11, 1937; minimum, 0.3 second-foot Jan. 8, 1937 (gage height, 1.69 feet). Remarks.- Records excellent except those for periods of missing gage heights, Dec. 10-14, Dec. 21 to Jan. 3, Mar, 23-25, which were computed on basis of partial recorder record and records for Eutte Creek near Chico and Concow Creek near Yankee Hill and are fair. Spring Valley ditch diverts water from Concow Creek for use by Lime Saddle and Coal Canyon plants of Pacific Gas & Electric Co., and for irrigation in Table Mountain and Thermalito irrigation districts. Dewey, Miners, and Hendricks canals divert from head waters of West Branch into Butte Creek Basin for use in De Sabla and Centervllle plants of Pacific Gas & Electric Co. Round Valley Reservoir (capacity, 1,285 acre- feet) and Philbrook Reservoir (capacity, 4,875 acre-feet) provide storage In headwaters for these three canals. Lake Wilenor on Concow Creek has storage capacity of about 8,000 acre-feet. See records for Spring Valley ditch near Yankee Hill and Butte Creek near Chico. Discharge, in second-feet, water year October 1937 to Septentoer 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 8 11 230 250 1,550 1,380 945 1,340 1, £20 234 11 7 Z 52 8.5 203 270 2,840 2,130 910 1,380 1,260 202 10 7 3 75 7.5 186 290 1,940 1,720 910 1,260 1,340 187 9.5 7 4 14 7 170 254 1,130 1,300 1,300 1,260 1,300 174 8.5 6.5 6 9.5 7 154 234 1,010 1,140 1,430 1,300 1,260 164 8.5 6.5 6 7.5 7 144 224 1,500 1,100 1,060 1,260 1,180 161 8 6.5 7 6.5 8 143 210 1,540 1,100 945 1,260 1,140 152 7 7 8 6 8 128 196 3,740 1,100 910 1,300 1,100 135 7 12 9 6 7.5 157 178 3,810 1,020 980 1,380 1,020 116 7 16 10 6 8 11,400 176 4,060 910 1,020 1,340 945 106 6.5 12 11 6.5 192 14, 500 165 3,360 875 980 1,430 875 97 6 10 12 6.5 160 4,460 156 2,180 2,690 980 1,620 788 86 6 7.5 13 V 52 2,120 146 2,240 3,430 945 2,020 788 75 5.5 7.5 14 9 111 1,450 146 2,020 2,130 910 2,180 770 69 6 8 15 118 288 1,090 461 1,520 1,670 945 2,020 735 59 6 12 16 44 368 930 403 1,220 2,430 945 1,970 665 54 6 9.5 17 13 1,310 815 1,250 1,020 2,020 1,060 1,770 620 47 6 7 18 9 379 528 815 945 1,570 1.340 1,620 530 44 6 6.5 19 7.5 385 640 510 980 2,300 1,520 1,480 485 40 6.5 7.5 20 7 4,120 570 658 910 3,500 1,480 1,430 472 35 6.5 8 21 7 1,380 522 538 875 2,180 1,570 1,380 472 29 7 8 22 6.5 5BO 490 490 858 1,870 1,520 1,430 460 25 7 8 23 6.5 1,790 470 474 858 5,080 1,480 1,520 448 23 7 8 24 7 1,260 430 388 840 3,990 1,620 1,520 435 20 7 8 25 7 696 400 340 840 2,480 1,670 1,570 338 20 7.5 8 26 7 536 360 309 805 1,920 1,300 1,570 327 20 7.5 8.5 27 7 412 325 293 770 1,570 1,300 1,380 327 20 7.5 11 28 7 336 320 293 770 1,430 1,260 1,260 256 19 7.5 28 29 7 288 280 282 _ 1,260 1,260 1,220 250 18 7 24 50 7.5 254 250 251 - 1,100 1,300 1,220 248 16 7 9 31 9.5 - 250 629 - 1,020 - 1,220 - 12 7 - Second- Run-off In Month foot-days Mmrlimnn MlpJ.nivTO Kean acre-feet October ...... 497.0 118 6 16.0 986 14,946.5 4,120 7 498 29,650 44,115 14, 500 128 1,423 87,500 Calendar year 1937...... 154,505.5 14, 500 6 423 306, 400 11,279 1,250 146 364 22,370 46,131 4,060 770 1,648 91,500 March...... 59,415 5,080 875 1,917 117,800 April...... 35,795 1,670 910 1,193 71,000 May...... 45,910 2,180 1,220 1,481 91,060 22,054 1,340 248 735 43,740 July...... 2,459 234 12 79.3 4,880 222.5 11 5.5 7.18 441 291.5 28 6.5 9.72 578 Water year 1937-2 8...... 283,115.5 14, 500 5.5 776 561, 500 Peak discharge.- Nov. 20 (11:30 n.) 6,920 sec.-ft.; Dec. 11 (2 a.m.) 21,400 see.-ft.; Mar. 23 " p.m.) 8,100 sec.-ft. 290 FEATHER RIVER BASIN Concow Creek near Yankee Hill, Calif. Location.- Water-stage recorder, lat. 39°46', long. 121°32', in NEi sec. 16, T. 22 N., R. 4 E., just upstream from diversion dam for Spring Valley ditch, 300 feet below Lake Wilenor Dam and 4 miles north of Yankee Hill post office. Altitude, about 1,850 feet. Drainage area.- 14.7 square miles. Records available.- October 1927 to September 1938. Average discharge.- 11 years, 12.7 second-feet. Extremes.- Maximum discharge during year, 975 second-feet Feb. 9 (gage height, 2.87 feet); no flow for most of year. 1927-38: Maximum discharge, 1,840 second-feet Mar. 26, 1928 (gage neignt, 5.9 "feet); no flow for many months each year. Remarks.- Records good for low stages and fair for high stages. On Sept. 30, 1937, storage in Lake Wilenor, above station, was 3,430 acre-feet, and on Sept. 30, 1938, it was" 5,250 acre-feet. For total flow, add that of Spring Valley ditch, which di verts water around station (see next page). Gage-height record furnished by Table Mountain and Thennalito Irrigation Districts. Rating table, water year 1937-38 (gage height, in feet, and discharge, in second-feet) 0.1 0.0 1.3 270 520 2.5 800 2.0 102 1.4 310 565 2.6 850 130 1.5 350 610 2.8 950 1.0 160 1.6 390 655 3.0 1,050 1.1 195 1.7 430 2.3 700 3.2 1,160 230 475 2.4 750 3.5 1,325 Discharge, In second-feet, water year October 1937 to Septembsr 1938 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr, May June July Aug. Sept. 1 0 14 314 113 66 0 2 0 16 529 181 62 18 3 0 16 338 139 59 19 4 0 15 184 105 135 11 6 0 14 181 92 198 3.2 6 0 15 306 105 116 0 7 0 14 286 105 90 0 S 0 4.7 655 113 77 0 9 0 .2 610 100 68 0 10 0 0 560 87 62 0 11 491 0 560 84 53 0 18 223 0 310 294 49 0 13 102 0 358 314 47 0 14 62 0 342 188 43 0 15 45 8 258 142 41 0 16 35 24 195 262 41 0 17 29 209 148 202 41 0 16 25 87 148 161 39 0 19 19 77 142 148 37 0 SO 19 70 124 198 35 0 21 14 51 116 151 35 2.1 22 15 43 116 157 33 0 83 17 35 116 588 14 0 24 19 29 113 366 0 0 25 19 24 102 198 0 0 86 17 17 90 148 0 0 87 16 15 82 122 0 0 28 17 14 77 105 0 0 28 16 14 92 0 0 50 16 13 82 0 0 31 15 81 73 0 S«e end- Rtm-off In Month foot-days Maximum Minimum Mean acre-feet Dot 0 0 0 0 0 NOT 0 0 0 0 0 Decembar...... 1,231 491 0 39.7 2,440 C 6,388.7 491 0 17.5 12,670 Jan uary 919.9 209 0 29.7 1,820 Feb 7,360 655 77 263 14,600 Mar 5,205 588 73 168 10,320 Apr 11...... 1,441 198 0 48.0 2,860 May 53.3 19 0 1.72 106 Jim 0 0 0 0 0 Jul 0 0 0 0 0 Aug 0 0 0 0 0 Sep 0 0 0 0 0 Sater year 1937-3B...... 16,210.2 655 0 44.4 32,150 Peak discharge. - Feb. 2 (5:30 p.m.) 850 sec. -ft. | Pet. 8 (8 a.m.) 850 sec. -ft. j Feb. 9 (7:30p.m.) avo sec.-rt. FEATHER RIVER BASIN 291 Spring Valley ditch near Yankee Hill, Calif. Location.- Water-stage recorder, lat. 39°46', long. 121°32', In NEi sec. 16, T. 22 N., R. 4 E., just below diversion dam and 4 miles north of Yankee Hill post office. Altitude, about 1,840 feet (revised). Records available.- October 1927 to September 1938. Average discharge.- 11 years, 10.4 second-feet. Extremes.- Maximum dally discharge during year, 37 second-feet April 25, Sept. 26, 27; minimum dally, 0.2 second-foot on many days In November, December, and April. 1927-38: Maximum daily discharge, 49 second-feet Oct. 25-27, 1928; no flow for several months In each year except 1936 and 1938. Remarks.- Records good. Canal diverts from left bank of Concow Creek 300 feet below Lake Wilenor; water used for power and Irrigation. Gage-height record and results of one discharge measurement furnished by Table Mountain and Thermalito Irrigation Districts. Discharge, In aecond-feet, water year October 1937 to September 1938 Day Oct. HOT. Deo. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 30 23 0.2 0.4 11 0.3 0.3 16 10 5 15 23 2 21 21 .2 .4 9 .4 .3 36 10 5 15 23 S 17 21 .2 .4 4.6 .4 .2 35 7.5 5 15 27 4 17 24 .2 .4 4.3 .3 .4 34 7 5 15 31 6 20 26 .2 .4 4.2 .3 .4 35 7 5 15 32 6 22 E5 .2 .4 4.3 .3 .4 33 7 5 15 33 7 25 25 .2 .4 3.9 .3 .4 30 6 5 15 28 8 30 25 .2 8 2.3 .3 .3 29 4.2 5 15 15 9 31 25 .4 12 1.4 .3 .3 22 3.2 5 15 14 10 29 23 2.1 12 1.0 .3 .3 18 3.3 5 15 14 11 27 16 2.0 12 .9 .3 .3 22 3.9 5 15 26 12 29 12 .5 12 .7 .5 .3 31 4.6 5 15 26 13 30 12 .4 12 .7 .6 .3 27 7 5 15 26 14 25 11 .4 12 .8 .5 .3 12 11 3.4 15 21 15 19 10 .4 13 .6 .4 .3 9.5 11 2.6 15 15 16 16 7 .4 13 .5 .5 .3 15 10 2.6 15 24 17 13 2-1 .4 13 .4 .5 .3 17 9 2.6 17 36 18 IB .2 .4 12 .4 .4 .2 17 9 2.6 19 36 19 20 .2 .4 11 .4 .4 .'2 15 9 2.5 20 35 20 25 .7 .4 11 .4 .4 .2 15 8.5 3.6 20 35 21 27 .2 .4 11 .4 ,4 .2 16 6.5 3.9 22 35 22 27 .2 .4 11 .4 .4 .2 14 4.9 10 23 35 23 27 .5 .4 11 .4 .7 19 14 4.9 12 23 35 24 27 .3 .4 10 .4 .7 34 14 4.9 12 23 35 25 27 .2 .4 10 .4 .4 37 14 4.9 12 23 36 26 29 .2 .4 10 .3 .4 23 13 4.9 12 23 37 27 30 .2 .4 10 .3 .4 5 12 4.9 12 23 37 28 50 .2 .4 10 .3 .3 6 16 5 13 23 22 29 29 .2 -4 10 - .3 7.5 15 5 13 23 14 SO E8 .5 .4 10 .3 5.5 14 5 15 23 23 31 E8 .4 10 - .3 13 - 16 23 - Second- Mean Run-off In Month foot-days Maximum Minimum acre-feet October...... 770 31 13 24.8 1,530 311.7 E6 ,2 10.4 618 14.2 2.1 .2 .46 28 Calendar year 1937...... 3,850.1 36 0 10.5 7,650 Jan 268.8 13 .4 8.67 533 Pel 54.7 11 .3 1.95 108 MAX 12.3 .7 .3 .40 24 April...... 143.4 37 .2 4.78 284 fcy...... 623.5 36 9.5 20.1 1,240 199.1 11 3.2 6.64 395 JillT...... 215.8 16 2.5 6.96 428 568 23 15 18.3 1,130 B«I£* 829 37 14 27.6 1,640 Water year 1937-3 8...... 4,010.5 37 ,2 11.0 7,960 292 FEATHER RIVER BASIN Middle Fork of Feather River near Clio, Calif. Location.- Water-stage recorder, lat. 39°45', long. 120°36', in E4 sec. 23, T. 22 N., R. 12 E., 0.3 mile upstream from Frazier Creek and 1.5 miles northwest of Clio. Al titude, about 4,350 feet. Drainage area.- 699 square miles. Records available.- October 1925 to September 1938. Average discharge.- 13 years, 230 second-feet. Extremes.- Maximum discharge during year, 7,300 second-feet Apr. 20 (gage height, 11.6 feetj, from rating curve extended above 2,600 second-feet on basis of velocity-area studies; minimum, 16 second-feet Oct. 1. 1925-38: Maximum discharge, 11,000 second-feet Mar. 26, 1928 (gage height, 12.0 feet), from rating curve extended above 7,000 second-feet; minimum, 4.3 second-feet Sept. 5, 1934. Remarks.- Records good except those for periods of missing gage heights, Oct. 1-6, Nov. 28 to Feb. 22, which were computed on basis of weather records and records for Spanish Creek at Keddie and Indian Creek near Crescent Mills and are fair. Many small diver sions for irrigation above station. Discharge, In second-feet, water year October 1937 to September 1938 t Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. \ 1 17 23 270 1,110 3,040 945 191 58 32 3 20 23 430 1,260 2,980 920 180 58 31 S 30 23 418 1,730 2,480 870 170 55 30 4 25 23 392 2,160 2,240 848 162 54 31 6 30 23 80 418 2,430 2,110 825 153 52 30 6 25 24 475 2,380 1,930 780 143 50 42 7 20 24 572 2,020 1,850 740 134 48 39 8 20 23 660 2,160 1,890 700 130 47 34 9 20 23 720 2,530 2,020 660 121 47 33 10 20 23 802 2,800 2,020 625 116 45 30 11 20 38 870 2,980 2,160 555 112 43 30 12 20 41 >1,700 1,170 2,920 2,340 505 106 40 30 20 31 I 1,850 2,680 2,580 475 98 38 30 14 47 51 1,850 2,480 2,860 445 96 38 30 16 31 38 ' 2,160 2,340 2,980 430 99 38 30 16 25 43 v 2,630 2,380 2,920 415 96 36 30 17 23 211 2,380 2,630 2,680 388 97 35 30 18 23 86 2,800 3,160 2,290 343 95 34 31 19 23 68 3,640 3,760 2,060 311 84 34 31 20 22 291 5,320 4,740 1,770 284 80 33 32 21 22 351 4,320 5,020 1,500 306 73 33 33 at! 21 158 3,760 5,020 1,320 289 67 33 32 23 21 153 > 170 117 3,640 4,740 1,200 280 65 32 32 24 21 199 126 4,180 4,460 1,110 268 62 30 33 25 21 136 141 4,600 4,040 1,050 252 58 30 33 26 21 114 143 3,220 3,520 1,140 240 76 30 34 27 21 107 148 2,580 3,100 1,140 230 83 30 36 28 21 105 159 2,480 2,860 1,170 218 70 30 39 21 102 _ 2,200 2,920 1,080 209 64 30 37 30 21 100 _ 1,570 2,980 995 200 62 30 36 31 24 - ' - 1,200 - 970 - 61 30 - Seoond- Mean Run-Off In Month foot-days Maximum Minimum acre-feet 47 17 23.1 1,420 2,655 351 23 88.5 5,270 13,640 440 27,050 87, 042 - - 238 172, 600 150 9,220 7,874 _ _ 281 15,620 270 2,051 126,100 89,310 5,020 1,110 2,977 177,100 Ifcj-...... 3,040 970 1,931 118,800 14,556 945 200 485 28,870 58 30 39.4 2,420 981 42 30 32.7 1,960 Water year 1937-3 3...... 262, 259 - - 719 520,200 Peak discharge.- Dec. 11 (time not known) 5,320 sec.-ft.) Mar. 20 (12 m.) 5,480 sec.-ft.j Apr. 20 (3 p.m.) 7,300 see.-ft. FEATHER RIVER BASIN 293 Middle Fork of Feather River at BIdwell Bar, Calif. Location.- Water-stage recorder, lat. 39°33', long. 121°26', in NWi sec. 32 T. 20 N K. b E.. at highway bridge at BIdwell Bar, 2 miles upstream from confluence with ' North Fork and 7 miles northeast of Orovllle. Altitude, about 290 feet. Drainage area.- 1,353 square miles. Records available.- October 1911 to September 1938. Average discharge.- 27 years, 1,736 second-feet. Extremes.- Maximum discharge during year, 93,000 second-feet Dec. 11 (gage height, 24.0 reet, from floodmarks), from rating curve extended above 25,000 second-feet on basis of velocity-area and A/a studies; minimum, 173 second-feet Oct. 1. 1911-38: Maximum discharge, that of Dec. 11, 1937; minimum, 88 second-feet Jan. 8, 1937. Discharge for Mar. 26, 1928, previously published as 100,000 second-feet, has been revised to 90,000 second-feet on basis of studies made of flood of Dec. 11, 1937. Remarks.- Records excellent except those for periods of missing gage-height record, Dec. 11-12, Dec. 25 to Jan. 9,and July 5-24, 29, 31, which were computed on basis of partial recorder graph, comparative stage-graphs, and records for South Fork of Feather River and are fair. Reservoirs and diversions above station are comparatively small. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 175 233 975 1,540 4,400 4,280 5,980 10,000 8,240 2,030 635 342 2 212 247 895 1,570 5,940 7,520 5,810 10,200 8,240 1,980 620 339 3 355 249 846 1,600 5,480 6,960 6,150 9,100 8,240 1,900 610 336 4 268 247 798 1,500 3,920 5,480 7,440 8,660 8,240 1,780 595 339 5 247 244 774 1,460 3,470 4,640 8,240 8,440 7,840 1,750 575 339 6 230 244 726 1,430 3,800 4,400 7,440 8,240 7,640 1,650 556 336 7 218 252 703 1,400 3,580 4,280 6,860 8,240 7,240 1,500 546 332 B 208 249 680 1,370 6,420 4,400 6,860 8,440 6,860 1,450 533 336 9 200 247 717 1,370 6,600 4,280 7,640 9,100 6,500 1,350 524 316 10 200 244 36,700 1,340 8,120 4,160 8,240 9,540 5,980 1,300 510 306 11 200 462 72,000 1,340 7,720 4,280 8,660 10,000 5,330 1,250 492 293 12 198 634 22,500 1,280 5,940 8,210 8,880 10,700 4,720 1,200 474 287 13 200 450 12, 200 1,280 5,940 14, 300 8,240 12,600 4,440 1,150 458 284 14 297 625 7,920 1,250 5,780 10,400 7,840 14, 400 4,300 1,150 446 278 15 625 948 5,620 2,020 4,400 8,520 7,640 14,700 4,170 1,150 442 272 16 422 822 4,520 1,900 3,690 9,660 7,840 14,400 4,170 1,100 438 269 17 304 3,680 3,690 4,160 3,140 8,960 8,440 13,500 4,040 1,050 430 266 IB 267 1,810 3,250 3,580 3,140 7,920 10,500 12,000 3,420 1,000 422 266 19 247 1,210 2.840 3,040 a,94Q 9,660 12,300 10, 500 3,200 950 415 269 BO 236 6,610 2,500 2,740 2,640 17,800 13,200 9,320 2,890 900 407 272 21 233 4,890 2,280 2,460 2,550 15,000 14,400 8,880 2,990 860 403 269 SS 228 2,290 2,190 2,320 2,500 12,300 13,800 8,660 2,990 840 396 266 23 222 3,440 2,140 2,320 2,460 15,000 13,800 9,100 2,990 820 392 260 24 220 3,610 2,020 2,100 2,51.0 16,400 13 , 800 9,540 2,890 810 385 260 25 220 2,340 1,900 1,980 2,640 13, 500 13,200 9,540 2,740 787 374 263 26 218 1,760 1,860 1,860 2,640 11,500 11,500 9,760 2,540 776 370 266 27 218 1,440 1,820 1,820 2,640 9,540 10,700 9,760 2,440 798 363 284 2B 215 1,270 1,740 1,980 2,640 9,100 10,000 9,100 2,300 814 356 346 29 218 1,150 1,710 1,860 _ 8,240 10,000 8,660 2,160 750 353 339 50 218 1,060 1,640 1,740 - 7,240 10,200 8,240 2,120 700 349 319 31 228 - 1,570 2,550 - 6,320 - 8,240 - 660 346 - Seoond- Run-off In Month foot-daya VoTlim Minimum Mean acre-feet October...... 7,767 625 175 251 15,410 42,957 6,610 233 1,432 85,200 201,724 72,000 680 6,507 400,100 736,484 72,000 117 2,018 1,461,000 60,160 4,160 1,250 1,941 119,300 117, 680 8,120 2,460 4,203 233,400 March...... 274,250 17,800 4,160 8,847 544,000 April...... 285,600 14, 400 5,810 9,520 566,500 May...... 311,560 14,700 8,240 10,050 618,000 141,860 8,240 2,120 4,729 281,400 July...... 36,206 2,030 660 1,168 71,810 14,215 635 346 459 28,200 8,949 346 260 298 17,750 Water year 1937-38...... 1,502,927 72,000 175 4,118 2,981,000 Peak discharge.- Dec. 10 (11 p.m.) 80,200 sec.-ft.; Dec, 11 (about 6 a.m.) 93,000 sec.-ft.; Mar. 20 (9:30 a.m.) 20,200 sec.-ft. 294 FEATHER RIVER BASIN South Fork of Feather River at Enterprise, Calif. Location.- Water-stage recorder, lat. 39°32', long. 121°21', in SWi sec. 6, T. 19 N., R. 6 E., 0.8 mile upstream from McCabe Creek and 1 mile upstream from highway bridge at Enterprise. Altitude, about 550 feet. Drainage area.- 134 square miles. Records available.- September 1930 to September 1938. October 1911 to September 1930 at site half a mile downstream. Average discharge.- 27 years, 292 second-feet. Extremes.- Maximum discharge during year, 17,300 second-feet Dec. 10 (gage height, 20.4 feet). from rating curve extended above 4,000 second-feet on basis of velocity-area and AVostudies; minimum, 2.0 second-feet Oct. 1. 1911-38: Maximum discharge, that of Dec. 10, 1937: minimum, 0.2 second-foot Aug. 11, 1917. Remarks.- Records good except those for period of missing gage heights, Oct. 1-8, which were computed on basis of partial graph for Oct. 9 and records for Middle Fork of Feather River at Bidwell Bar and are fair. Storage and diversions above station for irrigation. See record for Palermo canal at Enterprise. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 2 11 147 276 1,240 1,150 985 1,300 1,300 810 87 8.8 a 5 89 137 306 1,860 8,060 938 1,300 1,270 800 25 8.7 s 15 28 130 316 1,510 1,580 915 1,160 1,870 190 24 8.2 4 5 28 184 286 965 1,300 1,160 1,140 1,270 176 24 3.0 6 4 28 117 876 800 1,090 1,300 1,140 1,210 164 18 4.8 6 4 28 110 867 1,040 990 1,060 1,140 1,160 153 15 4.8 7 3.5 30 99 258 940 940 985 1,140 1,110 144 14 4.8 8 3.5 89 93 840 1,860 915 960 1,160 1,040 134 14 5 9 3.0 28 114 838 8,080 845 1,010 ,240 942 125 13 4.8 10 3.0 28 8,360 889 8,400 780 1,040 ,300 880 117 18 4.7 11 3.0 70 18,900 823 8,240 780 1,060 ,390 788 109 12 4.7 12 3.0 78 3,760 820 1,480 i,960 1,060 ,540 695 103 10 4.5 IS 5.6 57 1,900 217 1,540 3,400 1,010 ,850 644 96 9 4.5 14 27 104 1,300 213 1,450 2,840 985 8,240 628 94 9 4.5 16 60 138 940 380 1,090 1,780 985 8,840 612 89 8.5 4.4 16 89 118 740 347 868 8,160 985 8,160 581 84 8.5 4.4 17 18 768 610 890 740 1,880 1,060 1,960 521 78 7.5 4.5 18 15 283 545 628 700 1,640 1,300 1,710 419 71 7 4.8 19 14 184 470 530 668 1,960 1,540 1,510 380 69 7 5 20 12 1,310 430 470 610 3,900 1,680 1,360 349 66 6 5 81 11 760 398 418 575 8,560 1,780 1,870 388 64 5.5 5 22 11 378 392 405 575 2,080 1,710 1,300 373 56 6 4.8 23 10 614 392 405 560 3,800 1,640 1,390 362 50 5.5 4.8 24 10 682 369 369 575 3,300 1,740 1,480 349 46 4.7 5 25 10 484 347 358 575 8,380 1,740 1,510 325 43 4.5 5.5 26 9.5 314 386 336 560 1,880 1,480 1,540 896 40 4.0 5.5 27 9.5 860 306 336 530 1,600 1,390 1,510 877 37 3.6 9 28 9.5 817 306 358 545 1,450 1,300 1,610 254 34 3.4 23 29 9.5 191 896 347 w 1,300 1,870 1,390 837 38 3.8 81 30 9.5 167 886 386 _ 1,140 1,330 1,330 826 89 8.9 18 31 10 - 286 628 - 1,060 1,300 88 8.8 Second- Run-off In Month foot -days M^-y^yi^iufi Minimum Mean acre- feet October...... 348.1 60 8.0 11.0 679 7,312 1,310 11 844 14,500 36,724 12,900 93 1,185 78,840 Calendar year 1957 ...... 189,553.6 12,900 8.0 355 857,000 Jan 11,090 890 813 358 88,000 Pel 30,570 8,400 530 1,098 60,630 March.."...... ,....,...,...... ,...... 55,200 3,900 780 1,781 109,500 April...... 37,398 1,780 915 1,247 74,180 May...... 45,510 8.840 1,140 1,468 90,270 80,150 1,300 886 678 39,970 July ...... 2,931 210 88 94.5 5,810 316.6 87 8.8 10.2 628 187.5 23 8.8 6.85 378 Water year 1937-J 847,731.8 12,900 2.0 679 491,400 Peak discharge.- Dec. 10 (5 p.m.) 17,300 sec.-ft.; Dec. 11 (5:30 a.m.) 17,100 sec.-ft.j Mar. 20 (7 a.m.) 4,990 sec.-ft. FEATTIER RIVER BASIN 295 Lost Creek near Clipper mils, Calif. Location.- Water-stage recorder, lat. 39°34', long. 121°09', in sec. 24, T. 20 N., R. 7 E., lyoOO feet downstream from Lost Creek Dam and 2 miles north of village of Clipper Mills. Altitude, about 3,050 feet. Drainage area.- 30.1 square miles. Records available.- October 1927 to September 1938. Average discharge.- 11 years, 56.9 second-feet. Extremes.- Maximum discharge during year, 3,380 second-feet Dec. 10 (gage height, 6.80 feet;"," computed from peak flow over Lost Creek Dam; minimum, 0.1 second-foot Oct. 1, Sept. 6-16 (leakage when gates are closed). 1927-38: Maximum discharge, thai, of Dec. 10, 1937; minimum (regulated), 0.1 second- foot at times during periods 1931-34 and 1937-38. Remarks.- Records good except those for periods of missing gage heights, Dec. 24 to Jan. 19, Aug. 17-29 (computed on basis of records of leakage and spill at Lost Creek Dam) and those for Dec. 23, Jan. 20 (computed from mean gage heights estimated on basis of partial graphs), all of vftlcli are fair. Storage in Lost Creek Reservoir above station was 2,470 acre-feet on Sept. 30, 1937, and 4,360 acre-feet on Sept. 30, 1938. Forbestown ditch diverts water a quarter of a mile above station(See p. 296). Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 0.1 0.2 0 2 90 181 310 317 465 276 44 4.0 0.2 2 .2 .2 2 100 239 502 310 456 259 42 4.0 .2 3 .2 .2 2 100 230 426 313 426 246 42 3.6 .2 4 .2 .2 2 90 169 338 364 41C 230 38 2.9 .2 S .2 .2 2 95 150 293 375 414 208 36 2.5 .2 6 .2 .2 2 95 152 276 331 414 199 35 2.6 .1 7 .2 .2 2 90 155 259 313 414 181 32 2.6 .1 8 .2 .2 2 7 90 242 252 320 422 169 30 2.3 .1 9 .2 .2 40 85 338 236 345 443 155 28 1.9 .1 10 .2 .2 1,490 85 443 223 356 447 144 26 1.8 .1 11 .2 .4 2,040 80 364 233 367 469 134 25 1.8 ,1 12 .2 .2 738 80 286 626 367 497 124 24 1.8 .1 IS .2 .2 426 80 252 867 364 556 115 22 1,8 .1 14 .3 .4 310 80 22C 526 360 619 110 22 1.8 .1 16 .2 ,2 246 170 184 434 364 636 100 21 1.7 .1 16 .2 .7 202 110 166 536 375 587 91 19 1.8 .1 17 ,2 1.1 175 300 15V 469 398 551 40 16 1.7 .2 18 .2 .2 155 210 16C 414 474 502 15 15 1.6 .4 19 .2 ,2 137 170 144 546 531 447 17 15 1.5 .4 20 .2 2.5 124 110 13V 1,120 656 418 39 15 1.4 .5 21 .2 .4 117 100 132' 676 576 394 68 14 1.3 ,5 22 .2 ,2 120 103 12& 531 551 402 66 10 1.2 .5 23 .2 .6 117 100 129 647 531 414 61 9 1.1 .5 24 .2 .5 110 91 12C 770 581 398 60 8.5 1.0 .5 25 .2 .3 105 84 129 561 581 386 56 7.5 .8 .5 26 .2 .2 100 81 12P 478 521 383 53 7 .8 .5 27 .2 .2 90 84 13!! 434 483 371 52 6.5 .7 .5 28 .2 .2 SO 103 139 414 460 360 50 6.5 .6 .6 29 ,2 .2 90 96 *. 383 456 331 49 5.5 .5 .6 SO .2 .2 85 82 356 460 302 47 4.5 .4 .6 31 .2 - 85 144 * 334 - 286 - 3.8 £ - Seoond- Run-off In Month foot-days Maximum Minimum Mean acre-feet October...... 6.S 0.3 0.1 0.20 12 11.1 2 5 .2 37 22 7,136,1 2,04o' .2 238 ' 14,270 25,430,8 1,490 .1 69.7 60,430 3,378 300 80 109 6 r700 5,420 443 129 194 10,750 14,470 1,120 223 467 28,700 April ...... 12,700 581 310 425 25,190 May...... 13,621 636 286 439 27,020 3 414 15 114 6,770 July...... 629 8 44 3.8 20.3 1,250 53^8 4.0 ,2 1.74 107 8.9 .6 .1 .30 18 Water year 1937-: &...... 60,908.9 2,040 .1 167 120,800 Peak discharge.- Dec. 10 (4 p.m.) 3,380 sec.-ft.; Dec. 11 (6 a.m.) 2,860 see.-ft.j Mar. 20 (8 a.m.) 1,470 seo.-ft. 296 FEATHKR RIVER BASIN Forbestown ditch near Clipper Mills, Calif. Location.- Staff gage and Parshall flume, lat. 39°34', long. 121°09', in SWi sec. 24, T. 20 N., R. 7 E., at outlet of diversion tunnel,1,100 feet downstream from Lost Creek Dam and 2 miles north of Clipper Mills. Records available.- October 1927 to September 1938. Average discharge.- 11 years, 20.7 second-feet. Extremes.- Maximum daily discharge during year, 42 second-feet Oct. 1; no flow during parts of period December to May. 1927-38: Maximum daily discharge, 43 second-feet Aug. 9 to Sept. 9, 1937; no flow at times. Remarks.- Records good. Staff gage read once daily. The ditch, which is on left bank of Lost Creek, diverts from Lost Creek Reservoir. Water is used for irrigation in Oroville-Wyandotte irrigation district, in Butte County. Discharge, In second-feat, water year October 1937 to September 1938 Day Got. HOT. Dec. Jan. Feb. Kar. Apr. May June July Aug. Sept. 1 42 26 29 8.5 V.5 0 28 34 38 40 2 39 26 29 8,5 7.5 0 28 34 38 40 Z 39 26 29 8,5 8 0 28 34 38 40 4 39 26 29 8.5 8 0 28 34 38 40 B 39 26 29 0 8.5 0 28 34 38 40 6 39 26 29 0 8.5 0 30 34 38 40 7 39 26 29 3.8 8,5 0 30 34 38 40 8 39 26 29 3.8 8.5 0 30 35 38 40 9 39 26 30 3,8 8,5 0 30 35 38 40 10 39 26 30 3.8 8.5 0 31 36 38 40 11 38 25 0 3,8 8.5 0 31 37 38 40 IS 39 26 0 3,8 1,6 0 31 37 39 40 13 39 26 0 15 1.6 0 31 37 40 40 14 38 26 0 15 1.6 0 31 37 40 40 16 35 26 0 15 1.6 0 32 37 40 40 16 35 27 0 15 1.6 0 32 37 40 40 17 35 28 0 15 1.6 0 32 37 40 40 18 35 29 0 15 1.6 0 32 37 40 40 19 37 30 0 15 1,6 0 32 37 40 40 no 37 32 0 15 1.6 9 32 37 40 40 21 36 34 0 15 1,6 0 34 38 40 40 22 36 2V 0 15 1.6 0 34 38 40 40 23 36 28 0 15 0 0 34 38 40 40 24 36 28 8.5 15 0 15 34 38 40 40 85 35 28 8.5 15 0 23 33 38 40 40 ' 28 86 35 8.5 15 0 23 33 38 40 40 87 35 28 8.5 15 0 23 33 38 40 40 28 35 29 8,5 ,V 0 28 34 38 40 40 29 37 29 8.5 ,7 28 34 38 40 40 SO 37 29 8.5 7.5 28 34 38 40 40 31 26 - 8,5 V.5 - 28 38 40 - Second- Mgy^TinnM KinintiDB Run-«ff in Honth foot-days Hean acre-feet 1,145 42 26 36,9 2,270 823 34 25 27,4 1,630 360,0 30 0 11,6 714 8,221.1 43 0 22.5 16,300 298 r2 15 0 9,62 591 108.1 8.5 0 3.86 214 0 0 0 0 0 April...... 0 0 0 0 0 *tr...... 205 28 0 6.61 407 944 34 28 31.5 1,870 July...... 1 ,132 34 36.5 2,250 1,217 40 38 39.3 2,410 1,200 40 40 40.0 2,380 Water year 1937-38...... 7,432.3 42 0 20.4 14,740 FEATHER RIVER BASIN 297 Palermo canal at Enterprise, Calif. Location.- Water-stage recorder and Parshall flume, lat. 39°32', long. 121°21 T , In SWi sec. 6, T. 19 N., R. 6 E., 400 feet downstream from Intake at diversion dam on South Fork of Feather River, 1 mile upstream from McCabe Creek, and 1 mile southeast of Enterprise. Records available.- October 1911 to September 1938. Average discharge.- 27 years, IS.S second-feet. Extrernes.- Ilaxlmum dally J.1 icliarge during year, 37 second-feet Aug. 8-10, 12-29; no flow Dec. 3 to June 14. 1911-38: Maximum discharge recorded, 43 second-feet July 25, 1927; no flow for some periods In each year. Remarks.- Records excellent except those for periods of missing gage heights, Oct. 1-10, June 16, 17, wtilch were computed from dally staff readings and partial recorder graph and are good. Canal diverts from left bank of South Fork of Feather River 1 mile above Enterprise. Water la used for Irrigation below Orovllle. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dee. Jan. Feb. Ear. Apr. Hay June July Aug. Sept. 1 26 21 8 0 29 30 36 2 26 23 3.3 0 28 32 35 3 26 23 0 0 28 30 35 4 26 23 0 0 28 30 34 6 26 23 0 0 28 32 31 6 26 23 0 0 28 35 31 7 25 23 0 0 28 36 31 a 26 23 0 0 28 37 31 9 26 23 0 0 28 37 30 10 26 23 0 0 28 37 30 11 25 24 0 0 28 36 30 12 25 22 0 0 30 37 29 13 26 21 0 0 30 37 29 14 28 23 0 0 30 37 29 15 28 23 0 2.1 30 37 29 16 26 23 0 10 29 37 29 17 23 IB 0 12 29 37 29 18 22 11 0 12 29 37 29 19 22 10 0 19 29 37 30 20 21 11 0 26 29 37 30 21 21 9 0 31 28 37 30 22 21 9 0 33 28 37 30 23 21 9 0 33 29 37 29 24 21 9 0 29 29 37 30 25 21 9 0 29 30 37 30 26 21 8.5 0 29 30 37 30 27 21 8.5 0 28 32 37 30 28 20 8.5 0 28 33 37 27 29 20 8,5 0 29 33 37 23 30 20 8 0 29 32 36 22 31 20 - 0 30 36 Second- Run-off in Month foot-daya Vn-rlmTin Minimum Mean acre-feet October...... 732 28 20 23.6 1,450 497 »0 24 8 16.6 986 ills 8 0 .36 2S 6,325.6 S3 0 1.7.3 12,530 0 0 0 0 0 0 0 0 0 0 March...... p.. 0 0 0 0 0 April...... 0 0 0 0 0 te...... 0 0 0 0 0 S79.1 33 0 1±£ p tOA 758 OQ July...... 908 33 (SO 29*3 1,800 1,110 37 30 35 «8 2,200 On o 36 22 AV *V 1,780 Water year 1937-3 4,535.4 37 0 12.4 8,990 1(502620 39 20 298 FEATHER RIVER BASIN Middle Fork of Tuba River at Milton, Calif. Location.- Water-stage recorder, lat. 39°31'22", long. 1EO°35'01", in SWi sec. 12, T. 19 N., R. 12 E., at diversion dam of Nevada Irrigation District at old town site of Milton, 8 piles upstream from Sonth Fork of Middle Fork. Altitude, about 5,700 feet. Drainage area.- 41 square miles. Records available.- October 1928 to September 1934, October 1935 to September 1938. December 1925 to September 1928 at site 0.2 mile downstream. Average discharge.- 10 years (1926-50, 1931-34, 1935-38), 105 second-feet (based on com- blned flow or Middle Fork at this station and Milton-Bowman tunnel at outlet). Extremes.- Maximum discharge during year, 6,800 second-feet Dec. 11 (gage height, 4.18 feet) from rating curve extended above 1,500 second-feet by wier formula; no flow over dam for long periods. 1925-34, 1935-38: Maximum discharge, that of Dec. 11, 1937; practically all low- water flow diverted after May 23, 1928. Remarks.- Records good except those for period of missing gage heights, June 22-30, which were computed on basis of partial graph for June 22 and records for Milton- Bowman tunnel at outlet and are fair. Milton-Bowman tunnel diverts water above station to Bowman Lake (see p. 30). Gage-height record furnished by Nevada Irri gation District. Rating table, water year 1937-38 (gage height, in feet, and discharge, in second-feet) 0.6 277 1,2 870 1.8 1,720 2.5 2,930 42 440 1.4 1,130 2.0 2,040 2.8 3,520 143 1.0 640 1.6 1,420 2.2 2,380 3.1 4,160 Discharge, In seoond-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Ear. Apr. Hay June July Aug. Sept. 1 0 0 38 300 728 2 0 0 42 300 798 3 0 0 50 256 870 4 0 0 58 277 1,080 6 0 0 54 323 1,320 6 0 0 46 354 1,210 7 0 0 46 380 1,130 S 0 0 50 450 1,090 9 0 0 68 546 961 10 2,240 26 83 619 846 11 4,010 38 99 695 488 12 450 54 110 834 235 13 126 88 94 1,090 228 14 19 78 94 1,380 270 16 0 63 104 1,390 308 16 0 54 121 1,320 323 17 0 50 149 1,140 242 18 0 42 242 896 132 19 .1 46 339 728 68 20 0 63 423 640 34 21 0 54 478 651 138 22 0 46 506 739 104 23 0 42 506 896 150 24 0 50 478 1,000 140 25 0 46 354 987 90 26 0 42 285 883 50 27 0 38 308 786 10 28 0 42 339 774 0 29 0 42 380 630 0 50 0 42 346 630 0 31 0 42 651 Second- Run-«ff in Month foot-days Maximum Minimum Mean acre-feet Oot 0 0 0 0 0 Hov 0 0 0 0 0 Dee 6,845.1 4,010 0 221 13,580 Calendar year 193 13,034.7 4,010 0 35.7 25,860 Jan 0 0 0 0 0 Feb 0 0 0 0 0 Mar 1,088 88 0 35,1 2,160 Apr 6,290 506 38 210 12,480 May 22,545 1,390 256 727 44,720 Jim 13,043 1,320 0 435 25,870 Jul 0 0 0 0 0 Aug 0 0 0 0 0 Sop 0 0 0 0 0 water year 1937-3 49,811,1 4,010 0 136 98,810 FEATHER RIVER BASIN £99 Middle Fork of Tuba River near North San Juan, Calif. Location.- Water-stage recorder, lat. 39°23', long. 121 °06', In IlEi sec. 32, T. 18 N., RT8E., 1 mile downstream from Oregon Creek and 1 mile north or North San Juan. Zero of gage Is 1,400.68 feet above mean sea level (general adjustment of 1989). Drainage area.- 207 square miles. Records available.- October 1930 to September 1938. July to October 1900 and October 1910 to October 1930 at site 0.4 mile upstream. Average discharge.- 26 years (1911-30, 1931-38), 4-64 second-feet, Including flow for Milton-Bowman tunnel at outlet. Extremes.- Maximum discharge during year, 24,000 second-feet Dec. 11 (gage height, 13.3 feet); minimum, 38 second-feet Oct. 1. 1910-38: Maximum discharge, about 86,000 second-feet Mar. 25, 1988 (gage height, 15.3 feet, former site and datum, from floodmarks, from rating curve extended above 1,200 second-feet; minimum, 14 second-feet Aug. 24-28, 1931. Remarks.- Records good. Since 1928 Milton-Bowman tunnel has diverted water above sta tion to Bowman Lake; small diversions also above station. Discharge, In second-feet, water year October 193V to Septeniber 1938 Day Oct. HOT. Deo. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 33 41 107 190 960 1,490 976 1,680 1,870 246 78 49 2 47 40 100 209 1,400 3,120 968 1,800 1,940 234 76 49 3 68 39 94 220 1,350 2,160 1,020 1,560 2,010 223 74 49 4 44 39 89 201 883 1,460 ,330 1,480 2,160 209 73 49 6 40 39 84 192 688 1,130 ,aoo 1,510 2,400 198 72 49 6 38 39 81 181 706 1,020 ,530 1,510 2,160 190 68 49 7 36 39 78 1V1 664 968 ,180 1,520 2,080 176 68 49 8 35 39 75 166 1,280 960 ,150 1,610 2,010 166 67 49 9 34 39 84 156 1,540 890 ,280 1,870 1,800 161 67 49 10 34 39 7,300 151 2,480 827 1,370 2,010 1,610 168 66 49 11 34 92 16,100 144 2,400 876 1,4SO 2,240 1,S80 148 64 48 12 34 97 3,840 141 1,210 2,170 1,430 2,480 841 136 62 47 13 35 67 1,600 139 1 ,100 3,640 1,300 3,220 760 130 61 47 14 98 160 953 136 1,060 2,160 1,220 3,970 772 128 61 47 16 107 132 688 298 848 1,620 1,210 4,080 814 128 61 47 16 63 149 641 261 718 1,940 1,270 3,750 834 122 61 47 17 49 639 445 1,180 607 1,740 1,460 3,320 796 118 60 46 18 44 244 377 748 629 1,420 2,160 2,660 696 112 60 46 19 41 148 325 685 688 1,880 2,650 2,160 510 108 58 46 20 40 429 284 475 607 5,040 2,S30 1,870 416 108 68 46 21 39 488 258 398 574 2,740 2,920 1,740 480 102 57 46 22 39 220 258 385 612 2,010 2,740 1,800 485 98 57 46 23 38 400 264 377 689 3,640 2,660 2,080 625 94 56 46 24 38 522 246 333 724 3,970 2,650 2,320 610 92 56 46 25 38 295 234 306 754 2,480 2,480 2,400 430 90 54 46 26 38 212 218 288 712 1,870 1,940 2,320 369 89 54 47 27 37 167 206 280 6r'0 1,590 1,740 2,240 333 90 63 52 28 37 144 206 291 688 1,630 1,740 2,080 288 90 52 58 29 37 126 201 388 .- 1,330 1,800 1,870 270 86 52 53 30 39 116 195 267 .- 1,160 1,740 1,740 255 81 52 51 31 44 - 192 501 " 1,040 1,800 80 51 Second- M^THflpnf Run-off In Month foot-days Minimum Mean acre-feet October...... 1,378 107 33 174*44 5 2 730 HoTenber. *«< .. . 6,S29 639 39 10^370 35,723 16,100 76 1,162 70,860 156,232 16,100 oo Ifv4gc 307,900 9,667 1,180 136 312 19,150 27 241 2,480 674 64,030 59 f 8V1 6,040 1 931 April...... 51,664 2 920 968 1 722 102*500 May...... 68 ?680 4*080 1,480 2,315 31 ,604 2 '246400 265 1,053 62)690 July...... 4,190 135 8,310 1,909 61 61.6 1,448 58 46 48.3 2^870 Water year 1937-3 £98,594 16,100 33 818 592 ,300 Peak discharge.- Dec. 10 (6(30 p.m.) 12,100 sec.-ft.j Dec. 11 (7i30 a.m.) 24,000 sec.-ft.; Mar. 20 (7 a.m.) 6,760 Bee.-ft. 300 FEATHER RIVER BASIN Tuba River at Smartville, Calif. Location.- Water-stage recorder, lat. 39°13' f long. 121°18', in SWi sec. 22, T. 16 N., R. 5 E., at Narrows, 1 mile downstream from Deer Creek and 1 mile north of Smartville. Zero of gage Is 264.17 feet above mean sea level. Drainage area.- 1,201 square miles. Records available.- June 1903 to September 1938. Average discharge.- 35 years, 2,962 second-feet. Extremes.- Maximum discharge during year, 95,000 second-feet Dec. 11 (gage height, 26.0 feet), from rating curve extended above 30,000 second-feet on basis of velocity-area study and comparison or peak discharge and total run-off of flood with similar rec ords for other stations in Yuba River Basin; minimum, 180 second-feet Nov. 8. 1903-38: Maximum discharge, about 120,000 second-feet Mar. 26, 1928, by slope- area method; maximum gage height, 29.2 feet, former datum,or 34.4 feet, present datum, Mar. 19, 1907; minimum discharge, 71 second-feet (regulated) July 30, 1924. Remarks. - Records excellent except those for period of missing gage heights, Aug. 3-8, and periods of doubtful record, July 20 to Aug. 2, Aug. 19 to Sept. 5, which were computed on basis of records for stations on North and Middle Forks of Yuba River and are fair. Diversions for power and irrigation above station. Storage above station Is provided by Lake Spaulding (capacity, 70,500 acre-feet), Bowman Lake (capacity, 67,400 acre-feet), Fordyce Lake (capacity, 42,000 acre-feet), and many smaller reservoirs. Discharge, In second-feet, water year October 1937 to September 1933 Day Oct. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 240 318 842 1,290 8,000 7,720 6,640 8,240 11,700 3,060 770 33O 2 290 297 808 1,310 10,900 15,600 6,400 9,100 12,300 2,990 766 330 3 408 297 819 1,470 11,300 12,900 6,400 7,680 12,600 2,570 720 320 4 339 304 808 1,320 8,000 9,400 7,960 7,160 13,200 2,310 660 450 6 290 304 753 1,220 5,960 7,460 10,900 7,420 13,200 2,050 620 320 6 290 311 786 1,180 6,200 7,070 8,240 7,420 12 ,900 1,920 590 312 7 290 270 786 1,080 5,170 6,680 7,160 7,420 12,900 1,650 560 312 S 290 285 808 1,030 10,000 6,440 6,900 7,680 12,600 1,780 530 312 9 290 304 878 980 10,600 5,840 7,420 8,520 12,000 1,660 506 317 10 290 318 34,900 910 15,300 5,390 7,680 9,100 10,800 1,610 494 312 11 275 530 74,200 862 16,700 5,390 7,960 10,000 9,360 1.540 482 306 12 285 630 24,900 817 10,900 11,600 7,960 10,900 7,360 1,420 482 300 IS 297 518 11,900 781 10,6OO 19 ,600 7,420 14,200 6,500 1,370 476 362 14 468 705 7,460 772 10,600 12,900 6,900 18,600 7,360 1,320 452 386 16 692 855 5,720 1,860 7,460 10,000 6,640 20,600 6,920 1,320 476 S98 16 492 755 4,460 1,800 5,610 11 ,600 6,280 19,400 6,920 1,260 476 398 17 408 2,480 3,730 6,200 4,560 11,300 6,640 17,800 7,840 1,150 458 334 18 360 1,670 3,240 5,960 5,170 9,120 9,100 14,900 6,920 1,090 440 295 19 353 1,320 2,880 4,170 5,610 10,300 11,600 12,900 5,900 1,010 430 339 20 339 3,350 2,560 3,240 4,260 23,900 12,200 11,400 4,580 980 420 398 21 311 5,970 2,340 2,560 3,900 16,000 12,600 10,300 4,940 950 410 398 SB 297 2,520 2,270 2,340 3,820 12,900 12,200 11,100 5,040 920 400 392 S3 318 2,980 2,340 2,270 3,820 18,600 11,600 11,700 5,510 900 390 392 24 318 4,210 2,130 2,060 4,170 22,200 11,600 12,900 5,320 880 380 339 25 297 2,650 2,060 1,860 4,360 15,600 11,600 13,200 4,850 860 370 306 26 290 1,890 1,930 1,6YO 4,170 12,200 10,000 13,900 4,490 850 370 306 27 285 1,500 1,800 1,670 3,900 10,600 9,100 14,200 4,230 850 360 312 23 297 1,240 1,740 1,800 3,900 9,700 8,520 12,900 3,900 840 350 334 29 304 1,070 1,660 1,930 . 8,800 8,800 12,300 3,430 820 340 328 SO 311 938 1,580 1,640 _ 7,680 8,520 11,400 3,130 800 340 322 31 346 - 1,400 3,240 - 6,900 - 11,700 - 780 330 - Second- Run-off In Month foot-days Mflxlimffn Minimum Mean aore-feet October...... 10,360 692 240 334 20,550 40 789 5 $970 270 1 ,360 80 ,900 204^468 74,200 753 6,596 405,600 1,000,163 74,200 212 2,740 1,984,000 61 292 6,200 772 1,977 121,600 204 940 16,700 3,820 7,319 406,500 March...... 351 )390 23 900 5,390 11,340 697 f 000 April...... 262,940 12^600 6 ,280 8,765 521 >600 May...... 366,540 20,600 7,160 11,820 727 000 238,700 13,200 3,130 7,957 473*600 July...... 43,700 3 ,060 780 1,410 86 #680 14,848 770 330 479 29,460 10,260 460 295 342 20,350 Water year 1937-28...... 1,810,227 74,200 240 4,960 3,591,000 Peak discharge.- Dec. 10 (7 p.m.) 83,800 see,-ft.; Dec. 11 (9 a.m.) 95,000 see,-ft.j Mar. 20 (9:36 a.m.) 26,200 sec.-ft. FEATHER RIVER BASIN 301 Milton-Bowman tunnel at outlet, Calif. Location.- Water-stage recorder, lat. 39°28', long. 120°37', in sec. 3, T. 18 N., R 12 E., near upper end of Bowman Lake. Altitude, about 5,600 feet. Records available.- May 1928 to September 1930, October 1931 to September 1938. Extremes.- Maximum dally discharge during year, 352 second-feet June 12; irlriimum daily. 2.1 second-feet Sept. 24. 1923-30; 1931-38: Maximum dally discharge, 453 second-feet May 13, 1937; mini mum daily, 1.3 second-feet Sept. 28, 29, 1937. Remarks.- Records good except those for periods of missing gage heights, Nov. 1, 2, 16- IBTDec. 14-16, E4-26, Jan. 3-6, Apr. 20-36, Sept. 12, which were interpolated or estimated and are fair. This tunnel diverts water from Middle Fork of Yuba River at Milton, In sec. 12, T. 19 N., R. 12 E., and discharges it into Bowman Lake Reservoir, from which it is conveyed to Lake Spaulding. During low and medium stages practi cally entire flow of Middle Fork of Yuba River is diverted. Gage-height record and results of several discharge measurements furnished by Nevada Irrigation District. Discharge, In second-feet, water year October 1937 to Septenbw 1938 Day Got. HOT. Dec. Jan. Feb.. Mar. Apr. May June July Aug. Sept. 1 19 4.8 18 60 34 45 18 21 338 244 24 33 S 11 4.8 17 58 .36 62 18 20 338 222 22 12 3 8.5 4.8 16 56 28 67 19 20 338 194 20 8 4 6.5 4.8 15 64 30 58 19 20 182 173 17 6.5 6 6 4.8 14 63 36 53 18 21 17 155 17 6.5 6 5.5 4.6 13 52 39 49 18 21 17 146 16 6.6 7 5 4.8 12 61 42 47 19 21 16 148 14 6.6 8 5 4.8 13 49 46 34 19 22 16 83 13 6.6 9 4.5 4.6 14 47 46 16 19 22 14 135 13 5 10 4.5 4.5 120 46 48 19 19 22 24 113 12 4.8 11 4.2 6 200 45 41 20 19 22 197 101 12 4.6 12 4.2 6.5 276 44 40 22 19 23 362 92 12 6 13 4.2 6 232 44 41 22 18 25 349 85 10 5.6 14 4.8 7 227 43 37 21 18 26 346 83 10 6 16 10 7.6 211 46 37 20 18 26 344 80 10 4.2 16 9 7.6 200 45 39 20 19 25 338 74 8.6 3.8 17 6.5 36 121 46 39 20 20 25 327 76 7.6 3.7 18 6 34 88 46 39 19 21 24 318 80 7.6 3.8 19 5.5 28 103 46 40 19 22 23 313 71 7,6 4.0 20 5 45 100 46 41 21 22 23 316 63 7.5 3.6 21 4.8 70 96 49 42 20 22 22 318 66 7.5 2.9 22 4.6 55 91 49 41 20 22 22 318 50 7.5 2.6 23 4.2 46 81 46 41 19 21 23 321 32 7.6 2.3 24 4.0 51 79 44 41 19 21 23 318 10 7 2.1 25 4.0 41 77 44 41 19 21 106 316 22 6.6 2.2 26 4,0 32 74 43 41 19 20 318 316 29 6 2.3 27 4.0 27 76 44 41 18 20 324 313 49 6 2,6 28 4.0 23 72 45 42 18 20 327 300 44 6.5 2,9 29 4.0 22 67 44 ^ 18 20 330 271 38 6.5 2.8 30 4.2 20 62 41 18 21 330 253 32 6 2.6 31 4.8 - 61 39 - 18 335 27 46 Second- If^TH^B^fll Run-off in Month foot-dayg Minimum Mean acre-feet October...... 181.4 19 4.0 6.85 36O 616.6 70 4.6 20.6 1,220 2,846 276 12 yi .0 6,640 29 t trx544 .i_*0 453 1.3 80.9 58,690 1,462 60 39 47 2 2,900 1,107 48 28 39^6 2 200 March...... 840 68 16 27.1 1^70 April...... 590 22 18 19 7 1,170 May.Iffa-w ...... 2,611 335 20 84^2 6,180 June ...... 7,543 362 14 251 14,960 July ...... 2 ,817 244 10 90 9 6,690 373.6 46 6 12 0 741 163.6 33 2,1 5 ".45 324 Water year 1937-38...... 21,161.1 352 2,1 67.9 41,960 302 FEATHER RIVER BASIN Oregon Creek near North San Juan, Calif. Location.- Water-stage recorder, lat. 39°24', long. 121°05', in SWi sec. 22, T. 18 N., R. 8 E., 1 mile upstream from mouth and 3 miles northeast of North San Juan. Alti tude, about 1,500 feet. Drainage area.- 35.1 square miles. Records available.- October 1933 to September 1938. October 1910 to September 1933 at site 0.7 mile downstream. Average discharge.- 27 years (1911-38), 72.5 second-feet. Extremes.- Maximum discharge during year, 2,750 second-feet Dec. 11 (gage height, 9.25 feet); minimum, 2.8 second-feet Oct. I (gage height, 1.58 feet). 1910-38: Maximum discharge observed, about 4,000 second-feet (revised) Mar. 25, 1928 (gage height, 9.5 feet, former site and datum), from rating curve extended above 600 second-feet; minimum, 0.7 second-foot several days in July and August 1931 and September 1934. Remarks.- Records excellent except those for period of missing gage heights, Jan. 22 to Mar. 10, which were computed on basis of records for Middle Fork of Tuba River near North San Juan and are fair. Small diversions for irrigation and raining above station. Revisions.- The maximum discharge for the water year 1926-27 has been revised to 3,400 second-feet, superseding figure published in Water-supply Paper 651. The daily dis charge was not revised. The figures of daily and monthly discharge for the water year 1927-28 have been re vised as shown by the following table. These figures supersede those published in Water-Supply Paper 671. Mar. 25 4,OOC 26 2.00C Run- off in Month Maximum Mean acre -feet 27,500 Water year 1927-28 ...... 4,000 76,0 55 ,200 Discharge, In second-fast, water year October 1937 to September 1958 Day Oct. HOT. Dec. Jaa. Feb. Mar. Apr. May June July Aug. Sept. 1 2.9 4.8 16 35 280 440 229 289 110 18 6,5 4.3 2 6 4.5 14 42 370 900 225 300 104 18 6,5 4.1 3 9.5 4.3 13 46 360 580 229 258 99 17 6,5 4.1 4 4.8 4.3 12 42 330 380 363 240 96 17 6.5 4.3 6 4.3 4.3 11 40 180 300 486 233 90 16 6 4.3 6 4.3 4.1 10 37 175 250 334 225 85 15 6 4.5 7 3,8 4,1 9.5 36 180 230 278 220 76 15 5.5 4,5 8 3,8 3.8 9 33 340 230 278 222 68 14 4,8 4.5 9 3.6 3.8 15 31 450 220 300 231 61 13 5 4.3 10 3.6 3.S 832 30 610 210 311 238 57 13 4.8 4.3 11 3.6 14 1,540 28 600 215 311 250 52 12 4.8 4.1 12 3.6 15 560 27- 340 588 300 258 46 12 4.8 4.3 13 3,8 8.5 268 27 280 935 278 289 4£ 12 4.3 4.1 14 15 25 179 26 260 541 258 322 40 12 4.5 4.1 16 12 20 130 72 230 396 250 322 37 12 4.8 4.1 16 6.5 27 102 65 195 504 264 300 36 11 4.8 4.1 17 6.5 112 81 571 160 454 278 268 34 11 4.5 3.8 18 5 36 68 289 160 358 370 234 32 10 4.5 3.8 19 4.5 23 58 194 160 596 439 207 29 10 4.3 3.8 20 4,5 107 52 149 155 1,370 454 185 29 9.5 4.3 3.8 21 4,3 76 46 125 150 748 454 171 28 9 4.3 3.8 22 4,3 34 47 115 150 560 410 161 26 8 4.3 3.8 23 4,3 90 49 110 170 1,160 383 161 24 8 4.5 3.8 24 4.1 110 46 105 175 1,060 424 164 23 8 4.8 3.8 25 4,1 54 42 90 180 702 470 160 22 8 4.5 4.1 26 4,1 37 39 82 170 522 383 157 22 7.5 4.5 4.1 37 4.1 29 37 76 170 410 322 152 21 S 4,5 & 28 4.1 24 36 76 200 396 300 146 20 7.5 4,5 6 29 4.1 20 35 74 334 289 132 19 7,5 4.5 5 60 4.3 18 34 72 _ 278 278 125 18 7 4.5 5 31 - 5 L 35 160 248 117 6,5 4.3 Seoond- Run-off In South foot-dnys Maximum Minimum Mean acre-feet JS.O1 K*7 ( ,4A 15 2 . yQ 5,08 312 921.3 J.-L&I 1 O 9*3 8 30.7 1,830 December...... 4,425.6 1,540 143 8 yY80 27,385.0 1,540 2.2 75.0 54,320 2 904 571 26 93.7 5,760 7 ,180 610 150 256 14,240 16,115 1,370 520 31,960 April...... 9 938 486 225 331 19,710 Bay...... 6*737 322 117 &±01 rjf 13,360 1,446 110 18 4811*4 S 2,870 July...... 352.5 18 6.5 699 152 9 6.5 4.3 4.93 303 127^6 6 3.8 4.25 263 Water year 1937-33...... 50,457.2 1,540 2.9 138 100,100 Paafr discharge.- Dec. 11 (6 a.m. 2,750 sec.-ft.; Mar, 20 (5 a.m.) 1,920 aec.-ft.j Mar. 23 {9 p.m.) 1,Y4O see,-ft. FEATHER RIVER BASIN 303 North Fork of Yuba River near Sierra City, Calif. Location.- Water-stage recorder, lat. 39°54', long. 120°40 ! , in NWi sec. 32, T. 20 N., R. 12 E., li miles west of Sierra City and 2i miles downstream from South Fork of North Fork. Altitude, about 4,100 feet. Drainage area.- 91.5 square miles. Records available.- 1911-13 (fragmentary), December 1923 to September 1938. Average discharge.- 14 years (1924-38), 215 second-feet. Extremes.- Maximum discharge during year, 9,800 second-feet Dec. 11 (gage height, 10.0 feet), from rating curve extended above 2,500 second-feet; minimum,38 second-feet Oct. 1. 1923-38: Maximum discharge, that of Dec. 11, 1937; minimum, 26 second-feet Oct. 15, 1931, Aug. 22, 23, 1934. Remarks.- Records good except those for period of missing gage^heights Dec. 26-28, which were computed on basis of partial graph and are fair. Small diversions for mining above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 40 46 87 148 135 178 200 652 2,000 600 146 68 2 46 45 85 153 133 250 205 640 2,060 556 140 66 S 50 45 82 148 130 234 224 591 2,120 512 138 64 4 47 44 79 142 138 202 244 596 2,180 466 134 66 6 47 44 76 138 135 186 244 624 2,240 434 130 64 6 45 45 74 132 133 175 227 640 2,180 414 128 66 1 42 45 73 132 132 166 224 674 2,120 400 126 64 a 42 45 73 128 132 152 240 768 2,060 384 120 64 9 41 45 136 127 146 159 286 908 1,940 360 116 64 10 40 45 4,310 125 157 159 322 1,040 1,760 339 114 63 11 40 57 5,300 124 153 168 354 1,220 1,510 318 110 61 12 40 50 1,300 122 144 268 370 1,440 1,320 304 106 61 19 42 54 810 122 138 386 338 1,820 1,280 296 104 59 u 109 70 565 122 140 310 330 2,240 1,320 290 104 58 16 70 61 448 135 138 272 342 2,360 1,370 276 102 56 16 52 97 374 128 133 275 378 2,240 1,420 270 100 54 17 47 191 322 155 130 247 453 2,060 1,280 273 98 54 18 45 105 286 148 130 230 696 1,640 1,080 254 94 58 19 44 103 250 140 128 275 894 1,440 920 241 90 64 20 43 304 227 135 124 426 1,010 1,300 890 229 88 59 21 42 218 211 133 125 334 1,040 1,260 980 214 84 58 22 43 136 200 138 127 286 1,010 1,350 950 202 84 54 25 42 160 191 133 128 318 992 1,540 1,020 193 82 54 24 42 148 188 127 133 330 943 1,760 980 181 79 54 25 42 127 183 130 135 282 744 1,880 890 175 79 56 26 42 114 166 128 136 254 646 2,120 832 197 75 54 27 42 107 162 128 136 240 652 2,060 766 193 75 64 28 42 100 157 130 140 247 684 2,000 705 175 71 70 29 42 94 153 128 «, 227 744 1,880 665 162 70 63 SO 44 90 151 125 - 214 714 1,880 636 153 70 59 SI 50 - 149 135 - 202 - 1,880 - 151 70 - Second- Run-off In Month foot-days lia-rlmim Minimum Mean acre- feet 1,445 109 40 46.6 2,870 2,835 304 44 544*94 6 5,620 16,868 5,300 73 33,460 89,905 5,300 37 246 178,300 4,139 155 122 134 8,210 3,789 157 124 135 7,520 7,662 426 159 24Y 15,200 April...... 15,750 1,040 200 525 31,240 May...... 44,503 2,360 591 1,436 88,270 41,474 2,240 636 1,382 82,260 July...... 9,212 600 151 297 18,270 3,127 146 70 101 6,200 1,819 70 54 60.6 3,610 Water year 1937-38...... 152,623 5,300 40 418 302,700 Peak discharge.- Dec. 10 (2 p.m.) 8,050 sec.-ft.j Dec. 11 (4 a.m.) 9,800 sec,-ft.j May 14 (9»30 p.m.) 2,780 seo.-ft. 304 FEATHER RIVER BASIN North Fork of Yuba River below Goodyears Bar, Calif. Location.- Water-stage recorder, lat. 39°32', long. 120°56', in SWi sec. 11, T. 19 N., R. 9 E., 3-J miles downstream from Goodyears Creek and 4 miles southwest of Goodyears Bar. Altitude, about 2,450 feet. Drainage area.- 244 square miles. Records1937. available.- December 1930 to November 1937. Station destroyed by flood Dec. 11 Extremes.- Maximum discharge during period, 26,000 second-feet Dec. 11 (gage height, 19.0 feet, from floodmarks), from rating curve extended above 6,000 second-feet on basis of drift-velocity measurement at 18,000 second-feet; minimum, 125 second-feet Oct. 2. 1930-38: Maximum discharge, that of Dec. 11, 1937: minimum, 69 second-feet Aug. 26, 1931. marks.- Records excellent for period Oct. 1 to Nov. 8. Several small irrigation and mining diversions above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 137 141 2 184 138 3 183 137 4 148 135 5 152 135 6 142 135 7 136 137 8 134 138 9 131 _ 10 131 - 11 130 _ 12 130 _ 13 138 _ 14 301 _ 16 250 - 16 174 _ 17 158 _ IS 150 _ 19 144 _ 20 141 - 21 139 _ 22 138 _ 23 137 _ 24 138 _ 25 135 - 26 135 _ 27 135 _ 23 134 _ 29 134 _ SO 136 _ SI 149 - Second- Mean Run-off In Month foot-days Maximum Minimum acre-feet October...... 4,670 301 127 151 9,260 _ _ _ _ _ Ju: July...... Water year FEATHER RIVER BASIN 305 Bowman Lake near Granltevll]e, Calif. Location.- Staff gage, lat. 39°27', long. 120°39', In SWt sec. 5, T. 18 N., R. 12 E., at Bowman Dam on Canyon Creek, 4 miles east of Granitevllle. Drainage area.- 30 square miles. Records available.- December 1926, when storage began, to September 1938. Remarks.- Bowman Lake stores water for Nevada Irrigation District. Part of Its supply is diverted from Middle Fork of Yuba River through Milton-Bowman tunnel and released to the lake through Bowman-Spauldlng canal. (See records for Milton-Bowman tunnel at cutlet and Bowman-Spauldlng canal at Intake.) Two dams confine Boman Lake. Elevation of crest of concrete arch dam Is 5,563 feet above mean sea level, of top of flashboards, 5,564.5 feet, and of crest of rockflll dam, 5,567 feet. Table shows total contents, all of which is available for release. Record of dally gage heights furnished by Nevada Irrigation District. Contents, In acre-feet, water year October 1937 to September 1938 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 42,240 29,940 20,850 36,840 _ 28,860 15,550 11,960 55,400 70,040 65,320 56,440 Z 41,820 29,460 20,550 » 28,980 14,440 12 ,560 57,560 70,040 65 ,080 56,200 3 41 ,400 28,980 20,350 « 29,280 13,400 12 ,960 59,960 69,960 64,840 55 ,880 4 40,910 28,440 _ 36,480 29 ,580 ., 13,400 62,360 70 ,040 64,520 55,640 5 40,490 27,960 - 36,360 - 29,640 11,360 13,880 64,280 70,040 64,120 55,320 6 _ 27,480 19 ,500 36,180 _ 29,520 10,200 14,400 65,720 70,120 63 ,800 55,160 7 - 27,000 19,150 - - 29,460 9,240 14,880 66,520 70,120 63,400 55,000 8 39 ,020 26,460 18,800 .r - 38,980 8,400 15,600 66,360 70,120 63,000 54,920 9 38,600 25,920 18,450 - - 28,380 7,560 16,550 66,360 70,040 62,760 54,920 10 38,180 25,440 20 ,750 35,340 - 27,780 6,450 17,250 66,600 70,040 62,520 54,920 11 37,690 24,960 30,720 35,040 w 27,240 4,850 18 ,100 67 ,400 70,040 62,200 54,640 12 37,200 24 ,480 33,600 34,800 _ 26,880 3,850 19,400 68,200 69,960 61,960 54,840 13 36,780 24,000 - 34,500 26,640 3,000 20,600 70,200 69,720 61,720 54,760 14 36,540 23,520 34,800 34,200 _ 26,160 2,100 22,100 70,120 _ 61,400 54,520 15 36,300 23,150 35,340 34,030 - 25,860 - 24,180 70,120 69,560 61,240 54,440 16 36 ,060 22 ,850 35,880 33,840 _ _ _ 27,780 70,200 69 ,400 60,920 54,280 17 35,820 22,950 36,240 33,720 _ _ 29 ,700 70,120 69,240 60,600 54,200 16 - 22,850 _ 33,540 _ 2,500 31 ,080 70,120 69 ,080 60,280 54,040 19 35,220 82,650 - 33,420 _ _ 3,850 32,100 68,920 60,040 53,880 20 34,920 22,600 36,660 - - - 5,550 33,120 70,120 68,680 59,720 53,720 21 34,620 22,650 _ 32,880 _, _ 6,390 34,020 70,120 68,440 59,400 53,400 ZZ 34,320 22,500 36,960 32,640 ., » 7,020 35,160 69,960 68,280 59 ,160 53,160 23 34,020 22,45O 37,020 .. _ 7,680 36,240 70,040 67,960 58,840 52,920 24 33 ,600 22 ,400 3,7080 32,160 30,120 _ 8,160 37,690 69,960 67,720 58,600 52,600 26 33,180 22,250 37,140 31 ,860 29,880 - 8,550 39 ,300 70 ,040 67.S40 58,280 52,360 26 32,700 22,100 37 ,200 31,620 29 ,700 _ 9,160 41,540 70,040 67,080 57,960 52,040 27 32,280 21,850 37,200 31,380 29,340 _ 9,800 44,200 69,960 66,840 57,720 51 ,720 28 31,860 21,600 37,200 31,140 29,100 10,160 46,580 70,040 66,520 57,480 51,480 29 31,320 21 ,400 37,140 30,900 « _ 10,760 48,820 70 ,040 66,280 57,240 51 ,240 SO 30,900 21,150 37 ,080 30,600 _ 18,150 11,400 50,920 70,040 65,960 _ 50,920 SI 30,420 - 36,960 30,300 - 16,850 - 53 ,080 - 65,640 56,680 - 306 FEA.THER RIVER BASIN Canyon Creek below Bowman Lake, Calif. Location.- Water-stage recorder and concrete control, lat. 59°26', long. 120°40', in SE-J sec. 7, T. 18 N., R. 12 E., 1 mile downstream from Bowman Lake and 3 miles upstream from Texas Creek. Altitude, about 5,100 feet. Concrete control constructed during period Aug. 10-23. Drainage area.- 31.7 square miles. Records available.- January 1927 to September 1938. Average discharge.- 11 years, 24.4 second-feet. Extremes.- Maximum discharge during year, 1,090 second-feet June 10; maximum gage height, 4.73 feet June 17; practically no flow Dec. 13. 1927-38: Maximum discharge, 1,460 second-feet June 6, 1936 (gage height, 5.98 feet), from rating curve extended above 700 second-feet; practically no flow at times when there is little or no leakage from dams above station. Remarks.- Records good except those for low flow, which are fair. Flow regulated by storage in Bowman Lake and diversion into Bowman-Spaulding canal. See records for Bowman Lake near Graniteville and Bowman-Spaulding canal at intake. Gage-height record and results of several discharge measurements furnished by Nevada Irrigation District. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dea. Jan. Feb. Bar. Apr. May June July Aug. Sept. 1 0.4 0.5 0 8 1.0 5.5 5.5 610 10 12 205 3,8 0,1 2 .9 .5 8 1.9 *10 *46 680 9 12 218 3.2 .1 3 .7 .5 ± 8 1.6 *10 13 675 7 12 194 2.8 .1 4 .5 .4 I 8 1.2 *8 4.6 648 9.5 14 91 3,2 .1 6 .4 .4 + 8 1.0 *6 #68 636 10 34 51 1.9 .2 6 ,4 .4 J 8 1.0 #5 «120 620 9.5 294 47 .5 .2 7 .4 .4 I 8 .9 3.1 108 615 10 653 60 .3 .2 a .3 .4 t 8 .9 1.9 115 605 12 870 31 ,2 .2 9 .4 .5 $5 .9 17 115 590 13 730 6,5 .1 .2 10 ,4 .5 $40 .9 14 117 580 14 435 7.5 t-1 .2 11 .4 1.4 $65 .9 2.7 118 565 15 81 4.6 t.l .2 12 ,4 1.2 32 .8 2.2 170 550 20 22 4,0 t.l .2 13 .5 .8 .4 .8 1.9 353 530 21 379 3,2 t.l .2 14 2 9 4.3 .2 .8 1.8 342 511 23 650 3.2 t-1 .2 16 Is 2.5 1.4 1.6 4.3 314 198 19 544 2.6 t.l .1 16 .6 12 1.4 1.2 2,9 294 6 17 710 3.4 t.l .1 17 ,5 19 1.3 3rl 2.0 349 10 12 80S 8.6 t.l ,2 18 .5 2.9 1.2 2.0 1,8 353 17 10 690 9 t-2 .2 19 ,5 3.1 1.0 1.6 1,8 361 14 8.5 520 10 t,2 .2 20 ,5 11 .9 1.4 2.5 345 15 a 459 9 t.2 .2 21 ,4 3,5 .9 1.6 *130 240 14 8.5 347 6 t.2 .2 22 .4 2.0 .8 2.4 *220 147 12 8.5 420 7 t.2 .2 23 .4 4.1 .9 2.4 *200 162 11 10 645 11 t.2 .2 24 ,4 3.5 .9 1.8 «60 183 12 10 625 11 .2 .2 25 ,4 2.5 .9 1.6 90 147 11 10 469 10 .2 .2 26 ,4 2.0 .9 1.8 4,3 191 9.5 7,5 438 11 .2 .2 27 .4 1.8 .9 1.8 3.1 268 10 5,5 396 8.5 .2 .4 28 .4 1.4 .9 1.8 2.7 272 9 12 373 6 .2 .6 29 .4 1.3 1.0 1.8 297 8.5 12 225 5 .2 .6 SO .4 1.0 1.0 1.8 _ 369 8.5 13 192 3.2 ,1 .4 31 ,5 1.0 2.0 - 452 12 3.2 .1 - Second- Run-Off In Month foot -days Maximum Minimum Mean acre-feet October...... 85*816 9 2,9 0.3 0.55 54 19 .4 2.86 170 166 ! 3 65 .2 5.36 330 6,417.1 605 _ 17,6 12,730 46*3 3.1 .8 1 .49 92 814,5 1.8 29 ,1 1,620 March...... 6,438,0 452 4,5 208 12,770 April...... 8,780,5 680 6 293 17,420 XaT...... 366.5 23 5,5 11.8 727 12 ,043 870 12 401 23,890 StiLj...... 1,050,4 218 2,6 33.9 2,080 6*6 S »6o .1 .61 37 .6 .1 .22 13 Water year 1937-J 8...... 29,833.6 870 .1 81.7 59,180 *Stage-dlseharge relation affected by ioej discharge oomputed on basis of partial graph and rec ords for Bonman-Spauldlng oanal at Intake and for stations on nearby streams, tConerete control being constructed} discharge Interpolated on basis of estimates furnished by Nevada Irrigation District. {Gage-height record incomplete; discharge computed on basis of partial record. FEATHER RIVER BASIN 307 Bowman-Spauldlng canal at intake, Calif. Location.- Water-stage recorder, lat. 39°27', long. 120°39', in sec. 8, T. 18 N., R. 12 E., 150 feet downstream from intake and a quarter of a mile downstream from Bowman Dam. Altitude, about 5,400 feet. Records available.- October 1927 tc September 1938. Average discharge.- 11 years, 135 second-feet. Extremes.- Maximum daily discharge during year, 246 second-feet Sept. 3, 27, 28; no flow Feb. 22, Apr. 16 to June 12. 1927-38: Maximum daily discharge, 262 second-feet Aug. 2-9, 29, Sept. 10-13, 1928; no flow at times in each year. Remarks.- Records excellent except those for periods of missing gage heights, Mar. 12, 13, 15-17, 20, 21, which were computed on basis of records for Canyon Creek below Bowman Lake and are fair. Canal diverts from left bank of Canyon Creek below Bowman Lake. Water Is delivered first to Fuller Lake and then to Lake Spaulding, and after passing through several power houses it is used for irrigation in Nevada irrigation district. Gage-height record and results of discharge measurements furnished by Nevada Irrigation District. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. D«o. Jan. Feb. Bar. Apr. Bay June July Aug. Sept. 1 244 238 229 207 235 222 63 0 214 236 S44 241 237 229 207 235 92 1.2 0 214 236 235 237 229 206 234 .6 14 0 4 235 236 229 206 233 .6 20 0 216 236 234 238 229 206 831 .8 20 0 218 240 845 6 235 238 229 20S 814 .S 20 0 222 239 234 238 229 211 174 88 20 234 237 229 216 174 216 20 0 235 238 237 235 206 215 174 217 20 240 235 39 215 174 217 20 0 240 241 844 11 241 234 .2 214 174 217 20 240 241 240 231 26 216 164 180 20 0 243 241 245 239 228 106 217 152 15 20 20 243 14 226 228 130 219 65 7 20 44 229 227 135 220 16 7 7 51 238 243 844 16 233 207 126 218 19 7 0 53 234 136 106 204 25 7 0 60 235 244 244 234 183 112 210 25 .4 0 29 237 220 111 210 26 .9 0 52 238 243 237 180 111 217 17 20 0 60 239 243 244 21 237 187 142 221 5 120 0 237 214 155 219 0 184 0 150 238 243 245 83 237 201 154 218 10 171 0 87 240 243 245 24 237 206 152 220 101 151 0 74 238 244 245 25 236 219 152 226 172 183 0 176 238 243 245 26 236 219 152 228 207 194 0 102 237 242 245 27 237 218 159 234 221 196 0 28 169 236 243 246 237 220 174 235 221 193 0 120 238 243 246 29 236 221 1S5 236 194 0 30 206 240 243 245 234 223 204 234 195 0 212 239 243 245 31 236 207 234 198 238 243 Second- Run-off In Month foot-days HEudntuBL Minimum Mean acre-feet pi o 4,886.2 229 .2 158 9,690 55,772.8 247 0 163 110,600 p*t o 13 380 132 March...... 222 Mofr O-zcr 7,341 246 244 245 14,660 Water year 1937-3 56,847.5 246 0 156 112,700 308 FKATHER RIVER BASIN Deer Creek near Smartville, Calif. Location.- Staff gage, lat. 39°13'20", long. 121°16'00", in sec. 23, T. 16 N., R. 6 E., 1 mile upstream from mouth and 2 miles northeast of Smartville. Altitude, about 500 feet. Drainage area.- 83.5 square miles. Records available.- June 1935 to September 1938. Extremes.- Maximum discharge during year, 10,800 second-feet Dec, 11 (gage height, 13.2 feet, from floodmarks), from rating curve extended above 3,500 second-feet on basis of AYcTmethod, verified by velocity-area studies; minimum discharge observed, 0.2 second-foot Oct. 1 and Aug. 7. 1935-38: Maximum discharge, that of Dec. 11, 1937; minimum, 0.2 second-foot on many days in August and September, on Oct. 1, 1937, and on Aug. 7, 1938. Remarks.- Records good. Storage reservoirs and diversions above station; maximum amount diverted, about 40 second-feet. At times water from South Fork of Yuba $iver is diverted into Deer Creek above station. Discharge, In second-feet, water year October 195V to September 1938 Day Oct. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1. 0.2 33 36 70 1,480 525 350 295 28 11 0,9 0,6 2 41 45 65 72 2,270 3,910 295 250 23 8 ,6 .5 S 2.2 31 15 68 3,030 1,850 415 201 20 9.5 .5 .6 4 2,0 55 45 66 1,100 1,100 1,110 192 26 8 .5 .6 6 2,2 65 40 63 1,280 940 1,050 174 28 7 .6 .8 6 2,0 65 40 59 605 695 450 158 19 5.5 ,8 .9 7 1.4 76 36 53 455 490 415 158 19 4,0 .2 .9 S 1.4 76 35 57 2,090 356 415 150 19 5.5 .9 .9 9 1.3 82 88 57 1,770 272 380 142 16 5.5 1,2 .8 10 1.3 82 2,420 55 3,670 356 350 142 18 3.8 .9 .9 11 1.3 88 6,620 55 2,830 420 320 142 25 3.1 .8 .8 12 1,8 88 1,930 53 1,340 1,220 320 142 20 2.4 .5 .9 13 8.5 88 455 53 3,030 2,090 295 126 16 1.8 .5 .9 14 34 76 170 51 1,550 610 270 111 14 1.7 .5 .9 16 30 76 138 272 650 570 240 111 19 1.4 .8 1.1 16 34 76 138 154 490 1,050 230 104 19 3.1 .8 .9 17 33 500 101 1,100 605 745 230 81 17 1.7 .9 .9 18 31 67 88 420 890 840 250 75 19 3.1 1,9 1.1 19 34 41 82 285 1,770 700 295 58 16 1.4 1,4 .9 20 15 460 66 248 790 3,550 295 49 17 2.7 .6 .8 SI 14 715 70 138 490 2,180 320 52 14 1.9 .6 .8 an 12 1,290 94 130 455 840 270 49 13 1.7 .6 .8 23 14 500 101 122 356 2,540 230 58 8.5 1.4 .8 .9 24 16 198 68 115 248 2,920 270 49 28 7 .6 .8 25 18 162 72 108 272 1,350 295 49 11 6.5 .5 1.1 26 19 115 82 88 248 995 270 44 9.5 3.1 ,6 1.1 27 20 36 75 94 226 700 220 44 7 2.2 .8 1.4 28 22 28 70 138 248 610 220 58 7 ,8 .6 1.4 av 28 19 72 150 _ 570 210 41 12 1,4 ,6 2.7 £0 34 14 68 130 .. 530 230 41 11 1.8 .9 1.7 31 34 77 990 - 490 - 32 2.2 .8 - Saoond- Maxlanon Mean Run-off In Month foot-days Minimum acre-feet 5 247 -I ME December...... 13,457 6,620 15 434 26,690 70,754,0 6,620 .2 194 140,300 5 494 1 223 2V2 May...... 295 32 1 w «z g 29.4 2.7 .5 .98 58 Water year 1937-; 109,538.4 6,620 .2 300 217,300 Peak discharge.- Dec. 11 (about 9 a.m.) 10,800 sec.-ft. FEATHER RIVER BASIN 309 Bear River near Wheatland, Calif. Location.- Water-stage recorder, lat. 39°00', long. 121°25', in sec. 3, T. 13 N., R. 5 E., 1 mile southeast of Wheatland, 6j miles downstream from Rock Creek, and 12 miles upstream from mouth. Altitude, about 85 feet. Drainage area.- 295 square miles. Records available.- October 1928 to September 1938. Extremes.- Maximum discharge during year, 12,300 second-feet Feb. 11 (gage height, 12.00 feet); minimum, 0.3 second-foot Oct. 1. 1928-38: Maximum discharge, 21,600 second-feet Apr. 8, 1935 (gage height, 15.15 feet); minimum, 0.2 second-foot Aug. 24, 25, 1933. . Maximum discharge recorded ,29,600 second-feet, Jan. 14, 1909, at site 8 miles upstream. Remarks.- Records good except those for period of missing gage heights, Apr. 10-13 (interpolated), and periods of doubtful gage-height record, June 1-7, 15, June 17 to Sept. 30 (computed on basis of partial gage-height graph and five estimates of dis charge), which are poor. River receives Inflow from Yuba River Basin above station. Storage reservoirs, and many diversions also above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 3 33 168 518 2,420 2,040 1,500 1,170 12 4 2 2 3 36 176 513 2,690 4,640 1,470 1,280 12 «4 3 3 9 36 176 491 6,560 3,650 1,430 1,130 12 4 4 5 34 180 452 3,760 2,560 1,730 1,060 12 B 7 5 36 ISO 385 2,740 2,080 2,860 942 12 3 6 6 36 153 252 2,470 1,920 1,960 828 12 *3 7 74 38 143 272 1,930 1,840 1,660 418 12 > 4 8 111 36 102 345 3,100 1,840 1,620 264 34 9 16 38 100 268 3,540 1,600 1,600 258 49 10 14 39 2,460 244 6,300 1,430 1,460 186 47 11 13 56 8,180 248 10,700 1,360 1,400 636 45 12 12 81 3,390 212 5,410 2,560 1,350 737 43 j 13 15 60 1,670 191 4,760 6,410 1,300 786 35 14 26 88 962 194 7,530 3,340 1,240 695 29 IB 38 88 746 573 3,540 2,380 1,200 702 15 16 31 74 674 442 S,420 3,030 1,090 695 12 10 17 31 426 649 827 1,880 3,240 1,130 632 9 , 10 18 31 234 631 799 2,000 2,290 1,170 583 6 19 34 284 626 714 2,470 2,120 1,280 662 3 SO 33 446 613 720 1,840 4,860 1,3.60 642 21 33 542 601 619 1,540 3,650 1,390 43S 22 31 464 596 671 1,430 2,660 1,320 42S 23 31 908 613 589 1,360 4,690 1,240 392 24 31 870 589 530 1,320 7,910 1,320 392 25 28 613 601 502 1,260 3,980 1,390 444 ' 3 26 30 516 689 486 1,180 3,040 1,240 300 4 . 3 27 31 398 571 469 1,080 2,600 1,170 246 28 31 234 571 464 1,120 2,280 1,090 217 29 33 197 559 486 2,040 1,060 212 30 33 184 547 447 1,800 1,130 119 6 31 34 541 876 1,620 26 Seoond- Run-off In Month foot-days Hflnritmvrni Minimum Mean acre-feet Oct 849.5 111 0.3 27,4 1,680 Hoi 7,125 908 33 238 14,130 Dec 28,265 8,180 100 911 56,040 Calendar year 19; 159,533.7 8,180 .3 437 316,400 Jan 14,699 876 191 474 29,160 Pel 88,350 10,700 1,080 3,166 175,200 Mar 90,450 7,910 1,360 2,918 179,400 11...... 42,050 2,860 1,060 1,402 83,400 & 17,217 1,280 26 555 34,150 Jun 444 49 14.8 881 Jul 180 5.81 357 Aue 168 5.42 333 Sop 120 4.0 838 1 ater year 1937-j 289,907.5 10,700 .3 794 675 /MO Peak discharge.- Feb. 11 (9s30 a.m.) 12,300 see. -ft. Feb. 14 (4 a.m.) 11,600 sec. -ft. j Mar. 24 (5 a.m.) 11,200 see.-ft. *Pleld estimate. 310 FEATHER RIVER BASIN Bear River canal near Coifax, Calif. Location.- Water-stage recorder, lat. 39°07', long. 120°58', in sec. 28, T. 15 N., R. 9 E., Just downstream from lower spillway gates, li miles downstream from diversion dam on Bear River and 2 miles northwest of Colfax. Altitude, about 1,950 feet. Records available.- January 1921 to September 1938. Average discharge.- 24 years (1914-38), 215 second-feet. Extremes.- Maximum daily discharge during year, 476 second-feet Oct. 29; minimum, 121 second-feet June 18. 1912-38: Maximum daily discharge recorded, 476 second-feet July 17, Oct. 29, 1937; no flow at times. Remarks.- Canal diverts from left bank of Bear River in sec. 22, T. 15 N., R. 9 E. Water is first used to develop power at Halsey and Wise power houses; part of it is then distributed for irrigation, and part is eventually spilled into North Fork of American River. Record of daily discharge furnished by Pacific Gas & Electric Co. Discharge, In second-feet, water year October 1957 to September 193S Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 461 467 418 354 309 303 292 294 393 3S8 350 r 420 2 453 468 396 358 274 318 250 286 394 393 346 420 3 375 471 366 332 259 292 272 293 404 384 413 418 4 468 472 425 366 263 272 291 288 393 380 415 422 6 452 454 442 360 270 291 264 311 410 400 417 423 6 467 423 445 363 275 309 268 299 303 442 402 420 7 461 390 433 332 254 289 259 347 329 446 397 420 8 456 406 422 361 277 301 265 351 297 335 418 422 9 241 427 418 358 227 292 268 322 379 370 415 426 10 236 42S 364 365 202 345 278 305 338 33S 422 420 11 275 428 315 388 189 350 231 307 375 380 422 422 12 467 434 310 396 159 305 291 180 396 431 420 420 13 456 441 319 402 215 299 275 363 313 379 430 424 14 462 362 371 403 214 238 293 386 301 373 415 429 ie 406 378 356 400 261 274 277 402 279 381 3S6 430 16 344 444 323 351 303 281 282 413 333 341 420 433 17 434 410 368 349 294 275 288 409 311 304 418 433 18 464 462 358 349 360 285 291 410 121 371 418 440 19 456 465 359 344 366 296 268 400 292 383 421 434 80 457 453 329 346 366 290 282 411 400 397 421 440 21 433 356 355 336 368 233 291 409 400 389 321 435 82 428 32g 368 348 396 285 275 397 387 569 382 436 23 408 413 334 349 370 318 282 413 376 375 420 440 24 359 421 362 349 396 261 281 405 399 354 430 435 25 445 326 368 351 399 238 277 404 391 344 431 440 28 443 331 362 350 400 247 289 380 378 409 432 436 27 471 455 339 351 392 283 289 405 387 419 420 440 28 474 442 361 356 391 288 292 412 379 413 417 440 29 476 444 360 351 _ 272 304 399 399 410 416 442 50 427 438 365 349 «- 281 297 416 391 411 414 441 31 394 - 356 356 - 301 408 301 421 Second- Rim-Off In Month foot-days Mq-rijmiyn Hlnlroum He an acre-feet 13 ,049 476 236 421 12,631 472 421 25,050 11,467 445 310 370 22,740 132,786 476 7 364 263,400 11,123 403 332 359 22,060 400 159 302 16,760 8 j917 350 233 288 17,690 April ...... 8 j362 304 231 279 16,590 toy...... 11,225 416 362 22^280 10,648 410 121 355 21 120 July...... 11,810 446 301 381 23^420 ZpT 12 ,670 432 OCj. 409 25,130 12 ,901 442 418 430 25,590 Water year 1937-28...... 133,252 476 121 365 264,300 AMERICAN RIVER BASIN 311 North Fork of American River near Coifax, Calif. Location.- Water-stage recorder, lat. 39°02', long. 120°54', in NWi sec. 30, T. 14 N., R. 10 E., 50 feet downstream from bridge on Coifax-Forest Kill road, 200 feet down stream from Shirttail Canyon Creek, and 5 miles southeast of Colfax. Zero of gage is 897.29 feet above mean sea level (general adjustment of 1929). Drainage area.- 308 square miles. Records available.- August 1911 to September 1938. Average discharge.- 26 years (1911-13, 1914-38), 638 second-feet. Extremes.- Maximum discharge during year, 26,700 second-feet Dec. 11 (gage height, 18.2 feet inside gage, 19.3 feet, from floodmarks); minimum, 39 second-feet Oct. 1. 1911-38: Maximum discharge, about 37.000 second-feet Mar. 25, 1928 (gage height, 25.2 feet, present datum from floodmarks), by slope-area method; minimum, 15 second- feet July 22 to Aug. 7, Aug. 12-15, 1924, Aug. 28, 1931. Remarks.- Records good except those for period of faulty gage heights, July 30 to Aug. 8, which were computed on basis of records for Middle Fork of American River near Auburn and are fair. A little storage and a few diversions above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dao. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 40 57 198 415 1,880 2,350 1,700 2,250 3,080 726 140 66 2 49 57 186 450 2,400 4,170 1,660 2,400 3,140 69 a 130 64 3 66 as 177 470 2,650 3,420 1,740 2,000 3,260 635 120 63 4 55 54 163 425 1,920 2,650 2,150 2,000 3,460 580 115 62 6 49 54 155 390 1,540 2,150 2,960 2,150 3,260 534 110 62 6 48 54 155 364 1,500 1,920 2,350 2,150 3,020 502 106 61 7. 46 54 149 346 1,300 1,740 2,100 2,200 2,840 494 104 61 8 44 54 146 332 1,540 1,700 2,000 2,400 2,670 472 102 61 9 44 52 157 310 2,150 1,580 2,250 2,720 2,400 436 101 60 10 43 51 9,710 296 4,040 1,460 2,400 3,020 2,250 404 99 59 11 43 100 16,500 287 4,840 1,500 2,400 3,200 1,960 368 97 59 12 43 133 4,980 274 3,080 3,210 2,400 3,650 1,660 345 94 57 13 46 85 2,550 269 2,550 5,780 2,100 4,610 1,580 326 91 57 14 94 160 1,740 260 2,970 3,910 1,960 5,330 1,700 315 91 55 16 126 157 1,340 506 2,250 2,960 2,000 5,330 1,780 337 91 54 16 76 128 1,160 470 1,740 3,140 2,100 4,750 1,700 300 91 55 17 63 907 1,020 960 1,540 2,960 2,300 4,330 1,620 300 90 55 18 60 468 895 1,060 1,460 2,450 3,390 3,520 1,320 290 88 55 19 57 248 799 895 1,620 2,620 3,910 3,020 1,150 270 86 55 20 57 437 715 799 1,460 5,930 3,910 2,720 1,060 254 85 56 21 57 751 649 715 1,380 4,190 3,910 2,670 1,250 242 82 56 22 as 357 627 721 1,380 3,200 3,650 2,840 1,220 224 82 55 23 55 369 676 704 1,380 4,470 3,520 3,260 1,220 213 82 55 24 55 710 616 616 1,460 5,780 3,460 3,390 1,180 204 80 56 25 55 441 594 578 1,500 4,050 2,900 3,520 1,090 193 79 57 26 55 341 495 566 1,420 3,260 2,400 3,650 1,030 188 78 58 27 55 290 512 561 1,340 2,780 2,400 3,520 940 270 75 64 28 55 255 490 566 1,340 2,560 2,450 3,260 858 216 72 72 29 55 234 440 583 2,250 2,500 2,900 780 188 71 66 30 55 214 425 522 1,960 2,350 2,840 742 165 70 61 31 57 425 853 1,780 2,900 150 68 Second- Month MqX^T"MBl Hun-of f In foot-days Minimum Mean acre-feet Dot 1,758 126 40 56.7 3,490 No-« 7,327 907 51 244 14,530 Dec 48,844 16,500 146 1,576 96,880 C lender year 1937...... 285,137 16,500 39 781 565,500 Jan 16,563 1,060 260 534 32,860 Pel 55,630 4,840 1,300 1,987 110,300 Mar 93,880 5,930 1,460 3,028 186,200 Apr 11...... 77,320 3,910 1,660 2,577 153,400 Ha; 98,500 5,330 2,000 3,177 195,400 Jur 55,220 3,460 742 1,841 109,500 Jul 10,836 726 150 350 21,490 AugT18t...... 2,870 140 68 92.6 5,690 S«p 1,777 72 54 59.2 3,520 1 ater year 1937-38...... 470,525 16,500 40 1,289 933,200 Peak discharge.- Dec. 10 (4 p.m.) 15,200 se .-ft.j Dec. 11 (11:30 a.m.) 26,700 sec.-ft.j Mar. 24 (1 a.m. 1 7,610 sec.-ft. 312 AMERICAN RIVER BASIN North Fork of American River at Rattlesnake Bridge, Calif. Location.- Water-stage recorder, lat. 38°49', long. 121°06 ! , in SWi sec. 9, T. 11 N., R. 8 E., 800 feet downstream from Rattlesnake Bridge, 3 miles downstream from Pilot Creek, and 6 miles south of Auburn. Altitude, about 350 feet. DraTnage area.- 999 square miles. Records ayailable.- November 1930 to September 1937. Station destroyed by flood of Dec. 11, 1937. Extremes.- Maximum discharge during water year 1937-38, 78,000 second-feet Dec. 11 (gage height, 25.9 feet, from floodmarks), from rating curve extended above 25,000 second-feet on basis of Av/cT studies. 1930-38: Maximum discharge, that of Dec. 11, 1937; minimum, 6.5 second-feet Aug. 15, 1931. Remarks.- No records obtained except peak stage; gage-height record destroyed with sta tion on Dec. 11. American River at Fair Oaks, Calif. Location.- Water-stage recorder, lat. 38°38'15", long. 121°15'55", just upstream from highway bridge at village of Fair Oaks, Sacramento Countv, and 10 miles downstream from South Fork. Altitude, about 72 feet. Drainage area.- 1,921 square miles. Records' available.- November 1904 to September 1938 (at several sites near highway bridge). Average discharge.- 32 years (1905-38), 3,700 gecond-feet. Extremes.- Maximum discharge during year, 114,000 second-feet Dec. 11 (gage height, 29.06 feet), from rating curve extended on basis of surface-velocity measurement; minimum, 179 second-feet Oct. 10. 1904-38: Maximum discharge, 140,000 second-feet (revised) Mar. 19, 1907, Mar. 25, 1928 (gage height, 31.4 feet, present datum), from rating curve extended above 75,000 second-feet; minimum, 3.6 second-feet Aug. 16, 1924. ' Remarks.- Records good except those for period of missing gage heights, Oct. 2-4, which were computed on basis of range of stage, partial graph and records for stations on North, Middle and South Forks of American River and are fair. Storage reservoirs, many diversions, and power plants above station. Some inflow from Bear and Yuba River Basins. Discharge, In eecond-feet, water year October 1957 to September 1958 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. Haf June July Aug. Sept. 1 386 585 1,040 1,870 10,900 7,520 7,960 10,900 15,100 4,500 830 480 2 420 604 970 1,940 10,300 16,600 7,760 12,300 16,500 4,220 772 480 3 530 560 970 2,010 18,700 18,700 7,960 10,600 16,200 3,940 745 495 4 550 585 925 2,010 12,400 12,400 8,840 9,800 17,900 3,560 745 510 5 538 585 902 1,800 8,740 9,520 14,200 10,300 17 , 500 3,110 695 525 6 555 595 880 1,800 7,060 8,240 11,100 10,900 15,800 2,920 650 480 7 570 595 380 1,600 6,020 7,280 9,560 10,900 15,500 2,750 610 495 8 472 590 880 1,570 5,820 6,840 9,080 11,700 14, 500 2,750 610 480 9 436 600 858 1,630 7,280 6,420 9,560 13,500 13,500 2,590 630 495 10 296 604 24,300 1,470 16,600 5,820 10, 600 15,100 12,300 2,440 592 495 11 247 658 81,100 1,470 33,400 5,620 10, 600 16,800 10,900 2,230 592 480 12 345 835 37,000 1,470 19,800 9,520 10,900 17,500 9,080 2,040 558 468 13 454 880 13,600 1,440 12,700 27,700 10,100 21,800 7,960 1,860 558 468 14 570 858 8,240 1,380 20,900 19,600 9,320 26,400 8,180 1,800 540 480 15 734 995 2,010 12,100 14,200 9,080 27,200 8,840 1,860 540 468 16 835 970 4,920 2,540 9,000 13,500 9,560 25,600 9,080 1,740 558 455 17 722 1,430 4,500 3,100 7,060 14,800 10,100 23,300 9,080 1,680 558 468 18 675 2,810 3,760 4,920 6,220 11,700 13,500 20,000 7,560 1,740 540 455 19 658 1,630 3,410 3,890 6,420 10,600 17,900 16,800 6,600 1,640 540 455 20 647 1,290 3,000 3,760 5,820 21,800 17,900 14,500 5,880 1,640 540 455 21 624 2,730 2,720 3,000 5,260 20,000 18,900 13,500 6,060 1,500 495 468 22 616 2,150 2,540 2,720 5,080 14,800 18,200 13,500 6,420 1,540 480 468 23 624 1,600 2,900 2,810 5,080 14,800 17,200 15,500 6,240 1,300 495 455 24 604 2,220 2,540 2,630 5,080 25,600 17,200 17,200 6,420 1,190 510 468 25 555 2,080 2,460 2,380 5,260 18,600 15,100 18,200 6,060 1,160 495 468 26 590 1,500 2,300 2,300 5,080 14,500 12,300 18,200 5,720 1,120 525 480 2V 600 1,290 2,010 2,220 5,080 12,300 11,700 19,600 5,560 1,120 495 510 28 590 1,200 2,010 2,300 4,920 11.100 12,000 17,900 5,080 1,640 480 558 29 585 1,100 1,940 2,810 10, 300 12,300 16,200 4,780 1,470 480 558 30 575 1,070 1,870 2,630 _ 9,320 11,700 14,800 5,080 1,160 480 558 31 595 - 1,800 3,200 - 8,400 15,100 - 920 495 - Seaond- Moxl^ Minimum Mean Run-Off In Month foot-days acre-feet 17,198 835 247 555 34,110 35,199 2,810 560 1,173 69,820 222,845 81,100 858 7,189 442,000 1,431,817 81,100 234 3,923 2,840,000 Jan 72,680 4,920 1,380 2,345 144,200 Fet 278,080 33,400 4,920 9,931 551,600 Mar 408,100 27,700 5,620 13,160 809,500 April...... 362,180 18,900 7,760 12,070 718,400 May...... 505,600 27,200 9,800 16,310 1,003,000 295,380 17,900 4,780 9,846 585,900 July...... 65,130 4,500 920 2,101 129,200 17,833 830 480 575 35,370 14,578 558 455 486 28,920 Water year 1937-38...... 2,294.803 81,100 247 6,287 4,552,000 Peak discharge.- Dee. 10 (10:30 p.m.) 68,000 sec.-ft.; Dee. 11 (6 p.m.) 114,000 see.-ft.; Feb. 11 ll~ a.m.; 37,k;0u see.-ft. AMERICAN RIVER BASIN 313 American River at Sacramento, Calif. Location.- Water-stage recorder, lat. 38°34'05", long. 121°25'20", at H Street Bridge, in city of Sacramento, Sacramento County, 6i miles upstream from mouth. Gage is set to datum of Corps of Engineers, U. S. Army. Records available.- July to October 1921, October 1929 to October 1932, and May 1934 to October 1938 (for low-water periods only) in reports of Geological Survey. 1926-38 (gage heights for high-water periods) in reports of Division of Water Resources of Department of Public Works, State of California. Extremes.- Minimum discharge during period July to October 1938, 342 second-feet Sept. 16 (gage height, 19.78 feet). 1921, 1929-32, 1934-38: Minimum discharge recorded, 21 second-feet Aug. 14, 1931. Remarks.- Records good. Storage reservoirs, many diversions, and power plants above station. Some inflow from Bear and Yuba River Basins. Discharge, in aeoond-feet, 1937-38 Day oet. July Aug. Sept. Oct. 1 406 4,300 840 470 597 2 400 3,900 780 480 614 3 505 3,680 728 480 636 4 500 3,470 739 485 720 5 522 3,020 690 540 684 6 527 2,780 650 470 660 7 544 2,620 610605' 485 648 8 505 2,620 480 660 9 483 2,500 620 485 684 10 385 2,400 600 480 642 11 264 2,150 600 480 630 12 315 1,950 572 457 624 13 439 1,770 564 448 592 14 527 1,680 536 457 602 15 638 1,680 554 457 750 16 834 1,590 564 439 1,080 17 687 1,510 554 439 888 18 680 1,550 550 444 816 19 638 1,510 535 448 750 EO 626 1,430 540 434 720 21 596 1,390 500 462 720 22 596 1,350 462 466 708 23 596 1,240 495 462 726 24 584 1,130 500 466 708 25 549 1,060 500 462 648 26 560 1,060 550 470 684 27 578 1,020 525 525 672 28 572 1,390 490 570 666 29 572 1,310 490 586 678 30 560 1,100 475 592 672 31 572 930 480 - 648 Second- Month foot -days Ma** *!*!»» Mean *£?_£.? 1937 October...... 16,760 834 264 541 33,240 1938 61,090 4,300 930 1,971 121,200 Aug iat...... 17,898 840 462 577 35,500 14,419 592 434 481 28,600 October £1 * 527 1,080 592 694 42,700 The perioc1...... 228,000 314 AMERICAN RIVER BASIN Middle Fork of American River near Auburn, Calif. Location.- Water-stage recorder, lat. 38°55', long. 121°00», in NWi sec. 5, T. 12 N., R. 9 E., at Mountain Quarry Co.'s plant, 1.7 miles upstream from confluence with North Fork and 34 miles northeast of Auburn. Altitude, about 580 feet. Drainage area.- 619 square miles. Records available.- December 1930 to September 1938. October 1911 to December 1930 at site half a mile downstream. Average discharge.- 27 years, 1,349 second-feet. Extremes.- Maximum discharge during year, 47,900 second-feet Dec. 11 (gage height, 27.3 feet;, from rating curve extended above 29,000 second-feet; minimum, 58 second-feet Oct. 1. 1911-38: Maximum discharge, about 62,000 second-feet Mar. 25, 1928 (gage height, 35.6 feet, former site and datum), by slope-area method: minimum, 20 second-feet Sept. 6, 1931, Sept. 19, 1934. Remarks.~ Records good. Small storage reservoirs and diversions above station. Revisions.- Revised figures of discharge for high-water period in water year 1927-28, superseding'those published in Water-supply Paper 671, are given below. Mar. 25 49,000 26 37,000 27 27,000 Month Maximum Mean Run-off in acre-feet Water year 1927-28 49,000 1,280 932,000 Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. KOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 61 82 238 581 2,840 3,240 2,920 4,820 6,380 1,800 314 113 2 70 82 224 640 3,160 6,540 2,920 5,420 6,860 1,640 293 119 3 90 79 213 700 3,9SO 6,100 3,080 4,380 7,020 1,590 2S2. 112 4 96 79 204 640 3,000 4,3SO 3,780 4,280 7,520 1,390 257 111 5 88 78 195 581 2,310 3,510 5,180 4,580 6,S60 1,240 236 109 6 87 76 188 539 2,080 3,080 4,180 4,700 6,240 1,180 221 108 7 83 78 185 502 1,860 2,770 3,780 4,820 6,240 1,160 208 109 8 78 79 185 481 1,910 2,630 3,690 5,420 5,820 1,180 203 108 9 75 79 190 452 2,630 2,430 4,080 6,100 5,300 1,090 195 101 10 74 SO 18,100 418 5,820 2,250 4,480 6,700 4,940 1,020 193 99 11 72 112 37,700 404 8,420 2,310 4,700 7,340 4,180 909 190 98 12 70 169 12,VOO 394 4,700 4,700 4,820 8,060 3,510 825 178 101 13 71 149 4,710 384 3,690 10,800 4,280 10,800 3,240 762 168 99 14 104 172 2,920 384 4,380 6,380 3,980 12,700 3,420 762 166 97 15 175 219 2,250 660 3,240 4,940 3,980 12,900 3,780 762 166 94 16 185 195 1,800 700 2,630 4,820 4,380 11,600 3,680 741 164 92 17 157 743 1,540 1,200 2,250 4,580 4,580 10,200 3,690 741 156 91 18 138 840 1,340 1,590 2,080 3,980 6,540 8,420 2,920 720 152 91 19 121 388 1,110 1,290 2,130 3,980 8,240 6,700 2,560 680 152 91 20 113 360 975 1,160 1,960 9,990 8,060 6,100 2,310 640 149 91 21 109 1,510 846 975 1,860 6,700 8,420 5,680 2,490 600 144 92 22 99 650 804 952 1,910 5,180 7,880 5,820 2,630 562 137 91 23 92 462 909 1,060 1,910 5,680 7,520 6,700 2,630 524 135 88 24 89 800 783 930 2,020 9,400 7,340 7,520 2,700 499 134 85 25 87 580 783 846 2,130 6,380 6,240 7,700 2,490 481 131 87 26 85 416 720 804 2,020 5,180 5,300 7,700 2,370 442 128 91 27 83 347 680 804 1,910 4,380 5,180 8,240 2,190 581 125 96 28 82 308 660 846 1,910 4,180 5,300 7,340 1,960 600 124 113 29 81 273 620 975 3,780 5,540 6,380 1,910 513 122 117 30 80 254 581 888 3,420 5,060 6,100 1,800 418 119 109 31 82 581 1,290 3,080 6,380 352 119 Second- Month Run-off in foot-days Maximum Minimum Mean acre-feet Oct 2,977 185 61 96,0 5,900 HOT 9,739 1,510 76 325 19,320 Dec 94,934 37,700 185 3,062 188,300 C 555,231 37,700 58 1,521 1,101,000 Jan nary 24,070 1,590 384 776 47,740 Pet 80,740 8,420 1,860 2,884 160,100 Mar 150,770 10,800 2,250 4,864 299,000 Apr 155,430 8,420 2,920 5,181 308,300 May 221,600 12,900 4,280 7,148 439,500 Jim 119,840 7,520 1,800 3,995 237,700 Jul 26,404 1,800 352 852 52,370 Aug 5,461 314 119 176 10,830 Sep 3,003 119 85 100 5,960 1ater year 1937-38...... 894,968 37,700 61 2,452 1,775,000 Peak discharge.- Dec. 10 (6s30 p.m.) 33,200 sec.-ft.t Dec. 11 (2 p.m.) 47,900 aeo.-ft.j May 15 (1 a.m.) 16,000 sec.-ft. AMERICA!! RIVER BASIN 315 South Fork of American River near Kyburz, Calif. Location.- Water-stage recorder, lat. 58°46', long. 120°19', in Si sec. 29, T. 11 N., R. lb E., beside Lincoln highway, 0.5 mile downstream from Silver Fork of South Fork and 2 miles west of Kyburz. Altitude, about 4,030 feet. ' Drainage area.- 196 square miles. Records available.- August to December 1907, October 1922 to September 1938. Average discharge.- 16 years (1922-38), 250 second-feet. Extremes.- Maximum discharge during year, 9,700 second-feet Dec. 11 (gage height, 8.55 feet), from rating curve extended above 3,900 second-feet on basis of velocity-area studies: minimum, 0.8 second-foot Aug. 10. 1922-38: Maximum discharge, that of Dec. 11, 1937; minimum, 0.3 second-foot Nov. 9-11, 1929. Remarks.- Records good except those for period of ice effect, Feb. 4-7, which were computed on basis of one discharge measurement and weather records and are fair. Discharge for Feb. 11 interpolated. Storage reservoirs and diversions above sta tion. El Dorado canal diverts half a mile upstream. (See records for El Dorado caral near Kyburz.) Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Bar. Apr. May June July Aug. Sept. 1 2.0 2.1 3.0 112 86 352 322 1,100 3,i4q 779 32 4.S 2 2.2 2.2 3.0 121 83 490 360 1,080 3,340 765 24 2.4 2 2.4 2.1 2.5 110 95 439 448 952 3,340 6SS 13 1.4 4 1.7 2.0 2.2 104 100 360 516 1,000 3,660 577 4.8 1.1 5 2.1 2.5 2.0 98 120 322 39S 1,110 3,550 434 2.0 1.3 6 2.0 2.4 4.2 89 110 300 330 1,170 3,240 394 1.6 1.3 7 1.8 2.2 2.4 79 100 289 315 1,250 3,240 356 1.4 13 8 1.6 3.1 1.7 76 95 27S 356 1,470 3,140 368 1.6 5.5 9 1.6 2.2 3.7 71 102 272 484 1,730 2,950 360 2.4 2.5 10 2.5 2.1 2,850 6S 106 262 538 2,070 2,600 296 1.3 l.S 11 2.1 3.4 6,470 67 106 289 610 2,2SO 2,130 238 1.2 1.5 12 2.2 2.6 1,960 64 109 640 604 2,770 1,620 172 1.5 1.4 13 2.5 2.1 904 63 93 772 400 3,340 1,470 159 9 1.3 14 19 4.K 538 64 82 533 464 4,100 1,630 207 2.5 1.6 15 26 1.? 416 92 83 453 528 4,210 1,850 150 1.9 1.5 16 2.9 2.6 322 78 79 448 634 3,880 1,930 157 1.5 3.4 17 2.1 53 275 101 76 416 904 3,550 1,770 210 1.0 4.0 18 1.8 7 238 89 76 381 1,620 3,040 1,450 144 1.0 1.0 19 1.3 2.5 207 85 74 368 1,820 2,600 1,180 182 1.0 1.0 20 2.4 78 174 74 64 500 1,920 2,360 978 159 7 1.3 21 1.8 51 165 78 66 425 2,000 2,200 1,080 210 1.7 1.3 22 l.S 2.4 154 8S 72 385 1,990 2,440 960 125 1.2 1.5 23 1.6 2.4 136 83 78 373 1,890 2,770 1,060 116 1.2 1.5 24 1.6 2.5 144 74 98 416 1,760 3,040 1,080 112 1.1 2.7 25 1.6 2.0 136 75 12* 377 1,400 3,240 996 106 1.8 2.0 26 l.B 1.5 130 79 262 356 1,240 3,340 996 162 1.8 2.0 27 1.8 1.5 128 82 268 352 1,330 3,550 952 218 1.8 6 28 2.4 2.2 117 82 262 373 1,420 3,340 904 161 1.3 7 29 1.8 2.2 114 79 356 1,430 2,950 1,130 104 1.6 1.9 30 2.1 2.2 110 67 326 1,200 2.95C 1,010 75 1.6 2.0 31 2.2 109 75 311 3,040 56 8.5 Second- Run-off In Month foot-daya Mqxf Timm Minimum Mean acre-feet Oct 102.5 26 1.3 3.31 203 NO'S 249.9 78 1.5 8.33 496 Dec 15,821.7 6,470 1.7 510 31,380 C 112,041.2 6,470 1.3 307 222,300 Jan nary 2,567 121 63 82. S 5,090 Pet 3,073 268 64 110 6,100 Mar 12,214 772 262 394 24.230 Apr 29,321 2,000 315 977 58,160 Ma, 77,922 4,210 952 2,514 154, 600 Jui 58 , 376 3,660 904 1,946 115,800 Jul 8,240 779 56 266 16,340 Aug 135.3 32 1.0 4.36 268 Sep 81.0 13 1.0 2.70 161 1 ater year 1937-38...... 208,103.4 6,470 1.0 570 412,800 Peak discharge.- Dec. 10 (9 a.m.) 4,040 see.-ft.; Dee. 11 (6 a.m.) 9,700 see.-ft, May 14 (8 p.m.) 4,91U seo.-rt. AMERICAN RIVER BASIN 316 South Fork of American River near Camlno, Calif. Location.- Water-stage recorder, lat. 38°46', long. 120-48' , In SWi sec. 25, T. 11 N., R. 11 K., 300 feet upstream from mouth of Iowa Canyon Creek, 1 mile downstream from in take of American River flume, and 3 miles northwest of Camino. Altitude, about 1,640 feet. Drainage area.- 497 square miles. Records available.- October 1922 to September 1938. Average discharge.- 16 years, 723 second-feet. Extremes.- Maximum discharge during year, 25,800 second-feet Dec. 11 (gage height, 25.5 Tee? from floodmark in house), from rating curve extended above 8,000 second-feet on basis of AVcTand velocity-area studies; minimum, 5 second-feet Sept. 3. 1922-38: Maximum discharge, that of Dec. 11, 1937; minimum, 1.2 second-feet (regu lated) Aug. 24, 1931. The previously published maximum discharge, 31,500 second-feet Mar. 25, 1928, has been revised to 24,100 second-feet on basis of studies made for the flood of Dec. 11. 1937. Remarks.- Records good except those for period of faulty gage heights Aug. 2, 3, which were Interpolated and are fair. Flow regulated by four storage reservoirs. American River flume (see p. 331), El Dorado canal (see p. 334), and Finnon Reservoir outlet (see p. 330) divert water above station. Revisions.- Revised figures of discharge for high-water period in water year iy^7-«ib, superseding those published In Water-Supply Paper 671, are given below. Discharge in second-feet Day River Flume* Mar. 19,600 19,700 26...... 11,900 12,000 River Flume* Period Mean Run-off in Mean Run-off in (see. -ft.) acre-feet (see. -ft.) acre-feet March 2,630 162,000 2,730 168,000 Water year 1927-2S ...... 768 558,000 874 634,000 Western States Gas and Electric Go's, Flume near Camino. Discharge, In second-feet, water year October 1937 to September 1938 Day oet. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 10 18 100 341 780 1,710 1.53C 3,120 5,740 1,410 171 34 2 30 78 142 352 721 3,120 1,590 3,550 6,100 1,350 140 38 3 19 94 112 386 802 2,880 1,770 2,960 6,100 1,290 120 35 4 27 119 112 341 702 2,080 2,220 2,500 6,710 1,140 104 31 6 27 112 95 319 596 1,650 2,960 3,040 6,220 920 88 26 6 14 118 112 308 564 1,440 2,290 3,120 5,740 824 81 30 7 16 114 125 300 548 1,290 2,080 3,280 5,740 780 80 38 3 24 124 98 304 532 1,200 1,950 3,640 5,280 740 73 44 9 12 124 132 252 684 1,120 2,290 4,320 5,060 740 71 44 10 10 114 7,340 268 1,710 1,040 2,500 4,950 4,520 666 62 37 11 9.5 164 18,500 252 2,960 1,100 2,640 5,280 3,820 585 55 19 12 12 202 6,580 256 1,590 2,500 2,720 6,100 2,960 499 56 36 13 15 162 2,640 248 1,140 5,060 2,360 7,360 2,570 460 62 32 14 46 184 1,650 248 1,230 3,200 2,150 8,660 2,880 460 60 33 16 135 192 1,260 386 1,020 2,500 2,220 8,660 3,120 436 62 30 16 77 171 1,020 352 824 2,430 2,430 8,140 3,280 390 63 34 17 30 364 802 564 740 2,290 2,640 7,620 3,120 448 53 36 18 35 356 702 630 740 1,950 3,820 6,710 2,600 401 60 18 19 19 205 630 532 740 1,950 4,840 5,620 2,150 412 54 42 20 16 200 502 448 702 4,520 5,060 5,060 1,830 390 54 32 21 28 454 488 422 684 3,280 5,500 4,520 2,010 401 66 29 22 25 309 461 435 702 2,500 5,280 4,840 1,950 346 56 36 23 24 252 461 448 740 2,500 5,060 5,740 1,950 294 54 28 24 19 338 398 386 721 3,460 5,060 6,100 2,010 275 47 38 25 18 272 410 398 740 2,640 4,220 6,460 1,830 id66 51 49 26 20 242 374 374 870 2,290 3,550 6,340 1,770 248 50 44 27 20 218 363 386 920 2,080 3,460 6,710 1,710 412 70 56 28 16 160 374 398 920 2,080 3,640 6,220 1,590 436 20 60 29 17 121 352 410 1,890 3,730 5,500 1,650 304 46 79 30 20 125 352 374 1,710 3,460 5,390 1,830 240 43 62 31 22 341 532 1,590 5,500 195 48 Second- Month M«.Tlm Run-off in foot-dsys Minimum Mean acre-feet Oot 812.5 135 is"g > 26.2 1,610 HOT 5,706 454 190 11,320 Dec 47,028 18,500 95 1,517 93,280 C alendar year 193 7...... 334,589.5 18,500 7.E> 917 663,700 Jan nary « . » 11,650 630 248 376 23,110 Fob 25,622 2,960 532 915 50,820 Man 71,050 5,060 1,040 2,292 140,900 Apr 95,020 5,500 1,630 3,167 188,500 May 167,310 8,660 2,800 5,397 331,900 Jim 103,740 6,710 1,590 3,458 205,800 Jul f...... 17,758 1,410 195 573 35,220 Augi 2,110 171 20 68.1 4,190 Sep 1,150 79 18 38.3 2,280 Water year 1937-3g 548,956.5 18,500 9.£> 1,504 1,089,000 Peak discharges.- Dec. 10 (about 11 a.m.)ll,800 sec.-ft.; Dec. 11 (about noon) 25,800 sec.-ft.; May 15 (1 a.m. ) 10,100 sec.-ft. AMERICAN RIVER BASIN 317 South Fork of American River at Coloma, Calif. Location.- Water-stage recorder, lat. 38°48', long. 120°53', in SWi sec. 17, T. 11 N., R. 10 E., at highway bridge at Coloma, 0.6 mile downstream from Irish Creek. Altitude, about 740 feet. Drainage area.- 635 square miles. Records available.- October 1929 to September 1938. Extremes.- Maximum discharge during year, 27,000 second-feet Dec. 11 (gage height, 20.5 feet), from rating curve extended above 13,000 second-feet; minimum, 52 second- feet Aug. 27. 1929-38: Maximum discharge, that of Dec. 11, 1937: minimum, 17 second-feet Aug. 25, 1931. Remarks.- Records excellent except those for days of faulty gage-height record, Dec. 29, 30, which were computed on basis of records for station near Camino and are fair. Irrigation diversions, four storage reservoirs, and two power plants above station. Discharge, In second-feet, water year October 193V to September 1938 Day Got. HOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 146 138 214 524 2,190 2,340 2,040 3,560 5,920 1,630 347 198 2 164 114 250 551 2,020 5,670 2,040 3,830 6,100 1,540 302 192 S 186 148 235 569 2,8SO 4,270 2,190 3,240 6,100 1,500 271 198 4 186 146 229 533 2,090 2,940 2,760 3,180 6,S50 1,340 264 206 5 1S1 148 235 512 1,460 2,340 4,120 3,300 6,280 1,120 244 181 6 167 143 214 491 1,220 2,090 2,940 3,430 5,740 1,050 229 154 7 156 146 235 465 1,030 1,360 2,660 3,560 5,740 981 238 178 S 164 151 232 478 1,050 1,760 2,490 3,830 5,230 9S1 217 192 9 175 156 235 436 1,680 1,630 2,760 4,580 5,060 948 217 198 10 154 148 7,280 444 4,340 1,500 3,000 5,230 4,740 884 220 200 11 146 203 18,100 428 7,8SO 1,580 3,060 5,570 4,120 796 209 200 IS 148 282 7,030 432 3,300 3,5SO 3,120 6,2SO 3,180 688 203 170 IS 141 213 3,000 420 2,600 7,250 2,820 7,660 2,760 637 200 181 14 16V 235 1,900 424 3,680 4,420 2,600 9,000 3,000 632 217 181 ie 278 268 1,500 647 2,240 3,430 2,600 9,000 3,300 632 217 181 16 260 229 1,220 612 1,680 3,560 2,S20 8,320 3,560 588 212 175 IV 214 440 1,010 884 1,340 3,430 3,060 7,660 3,430 642 209 186 IS 16V 508 916 981 1,260 2,760 4,270 6,850 2,760 607 203 184 19 167 313 824 854 1,260 2,710 5,230 5,740 2,390 588 206 170 SO 148 282 741 768 1,150 6,570 5,400 5,230 2,090 588 203 184 S3. 154 565 688 662 1,120 4,580 5,740 4,580 2,190 574 206 184 22 159 416 662 688 il, 080 3,430 5,570 5,060 2,140 529 206 181 23 156 328 741 688 1,150 3,970 5,400 5,920 2,140 470 209 172 24 159 436 602 622 1,120 5,920 5,400 6,280 2,240 461 203 178 25 133 360 632 602 1,180 3,970 4,580 6,660 2,090 440 198 SIS S6 143 285 593 588 1,260 3,300 3,830 6,470 1,990 428 200 200 27 148 264 560 593 1,300 2,880 3,830 6,850 1,900 588 196 214 28 141 268 564 622 1,300 2,820 3,970 6,280 1,760 622 217 235 29 141 21V 560 714 2,600 4,120 5,570 1,810 491 181 254 SO 143 241 540 652 2,340 3,690 5,400 2,090 416 195 232 31 159 529 1,030 - 2,140 5,740 358 192 - Second- Mflyf-pni^i lUT^mum Run-off In Month foot-daya Mean acre-feet 5,151 278 133 166 10,220 7,790 565 114 260 15,450 52, 271 18,100 214 1,686 103,700 415,886 18,100 83 1,139 824,900 18,914 1.030 420 610 37,520 55,910 7,880 1,050 1,997 110,900 103,640 7,250 1,500 3,343 205,600 April...... 108,110 5,740 2,040 3,604 214,400 May...... 173,860 9,000 3,180 5,608 344,800 108,700 6,850 1,760 3,623 215,600 July...... 23,749 1,630 358 766 47,110 6,831 347 192 220 13,560 5,771 254 154 192 11,460 Watar year 1937-318...... 670,697 18,100 114 1,838 1,330,000 Peak discharge.- Dec. 11 (2 p.m.) 27,OOO sec.-ft.j Feb. 11 (6 a.m.) 10,400 sec.-ft.j May 16 (1 a.m.; 1U.7OO aec.-ft. 318 AMERICAN RIVER EASIN Echo Lake flume near Vade, Calif. Location.- Water-stage recorder,, lat. 38°50', long. 120°02', in NWi sec. 6, T. 11 IT., R. 18 E., half a mile downstream from intake and 2 miles northeast of Vade post office (formerly known as Phillips). Altitude, about 7,500 fest. Extremes.- Maximum daily discharge during season, 27 second-feet Sept. 13-15 and 19: no flow during most of year. 1925-38: Maximum daily discharge, that of Sept. 13-15, 19, 1938: no flow during most of each year. Remarks.- Records good. Flume diverts water from Echo Lake, in Truckee River Basin, into basin of South Fork of American River for power. Discharge, in second-feet, 1937-38 Day Oct. HOT. Sept. Oct. Mov. 1 14 1.6 0 21 4.2 S 13 1.4 0 19 2.7 3 12 1.2 0 18 0 4 11 1.1 0 17 0 S 10 .5 0 16 0 6 9,5 0 15 14 0 7 8.5 0 25 13 0 a 7.5 0 25 12 0 9 V 0 26 11 0 10 6.5 0 26 10 0 11 6 0 26 9 .5 0 12 5.5 0 26 9 0 13 4.9 0 2V 8 ,5 0 14 5 0 27 8 0 15 6 0 2V 7 5 0 16 5.5 0 26 7 0 17 5 0 26 V 0 18 5 0 26 6 ,5 0 19 2.9 0 2V 6 0 20 2.6 0 26 5 5 0 21 4.6 0 26 4 9 0 22 4.4 0 26 4 7 0 23 4.0 0 26 4 5 0 24 3.8 0 26 4 2 0 25 3.4 0 26 3 .8 0 26 3.0 0 26 3 .4 0 27 2.V 0 25 3 0 0 28 2.3 0 24 2 .9 0 29 2.1 0 23 3 2 0 30 2.0 0 22 3 .3 0 31 1.7 3 V - Second- MqX^*T"?« IH n^ymrpl K08R Run-off In Month foe t-days acre-feet 1937 October ...... 181.4 14 1.7 5.85 360 November...... 5.8 1.6 0 .19 12 1938 September...... 631 27 0 21.0 1,250 October...... 267.1 21 2.9 8.62 530 November...... 6.9 4.2 0 0.23 14 The period...... 905.0 27 0 1.V90 Note.- Ho flow Deo. 6, 1937, to Sept. 5, 1938. AMERICAN RIVER BASIN 319 Medley Lakes outlet near Vade, Calif. Location.- Water-stage recorder, lat. 38°51', long. 120°08' (longitude published in Water-Supply Paper 831 erroneous), in SWi sec. 29, T. 12 N., R. 17 E., 1 mile doimi- stream from main dam at Medley Lakes and 5 miles northwest of Vade post office (formerly Phillips station). Altitude, about 8,100 feet. Drainage area.- 6.2 square miles. Records available.- September 1922 to September 1938 (none for winter in most years). Extremes-- liSaxlmum discharge during year, 166 second-feet Dec. 10 (gage height, 3.06 reet;; minimum, 0.4 second-foot, Sept. 25-30. 1922-38: Maximum discharge, 202 second-feet June 15, 16, 1929 (gage height 3.42 feet); no flow at times in most years. Remarks.- Records good except those for period of ice effect, Dec. 23 to June 23, which were computed from gate openings and probable inflow below dam and are fair. Dis charge for period of faulty gage-height record, Sept. 21-30, computed on basis of gage heights for Sept. 20 and Oct. 5. Practically no available storage in Medley Lakes above station on Sept. 30, 1937; on Sept. 30, 1938, there was 200 acre-feet. Rating table, water year 1937-38 (gage height, in feet and discharge, In second-feet) 0.0 0.0 1.1 16 .1 .2 1.2 20 .2 .4 1.3 25 .3 1.4 30 1.5 1.5 35 .5 2.5 1.6 41 4.0 1.8 54 5.5 2.0 69 7.5 2.2 85 10 2.4 103 13 charge, In second-feet, water year October 1957 to September 1938 Day Oct. HOT. Don. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 6.5 15 12 48 50 23 82 S 6.5 15 12 50 51 21 81 3 7 14 11 52 50 18 79 4 6.5 14 10 54 48 15 79 6 6.5 14 9 28 56 27 14 77 6 6.5 14 7.5 58 8 13 48 7 6.5 13 7 60 8 13 26 8 6.5 13 6.5 62 7.5 12 25 9 6.5 13 7 64 6.5 14 25 10 6.5 12 102 66 5.5 28 25 11 6-5 14 100 68 4.6 26 24 12 6.5 12 30 70 4.4 42 24 13 6.5 11 25 72 4.3 56 24 14 11 12 24 75 4.4 56 24 16 10 11 24 76 4.3 55 24 16 9.5 11 28 77 4-8 55 14 17 8 13 34 77 4.6 55 2.8 18 7 12 34 77 5.5 55 1.7 19 6.5 13 33 77 20 68 1.2 eo 6.5 14 32 77 31 79 1.0 21 6.5 13 32 78 36 79 .8 22 6.5 13 32 79 43 78 .7 23 6.5 13 31 80 46 77 .6 24 6.5 13 31 65 46 77 .5 25 6 13 31 52 42 76 .4 26 5.5 13 30 53 51 75 .4 27 5.5 13 30 50 63 74 .4 28 8 13 30 48 46 73 .4 29 16 13 29 52 36 72 .4 SO 15 12 29 51 28 79 .4 31 15 - 29 45 24 83 Second- Run-off in Month foot-Oaya Maximum Minimum Mean acre-feet 240.5 16 5.5 7.76 477 389 15 11 13.0 772 882.0 102 6.5 28.5 1,750 6,422.8 102 _ 17.6 12,740 775 25 1,540 140 5 2V8 -}QA 93 ~ _ 3 J.O4 April...... 150 _ 5 298 May...... 775 25 1,540 1 924 RO 48 64.1 3,820 July...... 'slO.4 63 4.3 96 *1 1,610 1,561 oo0 Silver Lake outlet near Kirkwood, Calif. Location.- Water-stage recorder, lat. 38°40', long. 120°08', in SWi sec. 32, T. 10 N., R. 17 E., 1,000 feet downstream from Silver Lake Dam and 3 miles southwest of Kirk- wood. Altitude, about 7,EOO feet. Drainage area.- 14.9 square miles. Records aval la'ble.- September 1922 to September 1938. Average discharge.- 16 years, 30.8 second-feet. Extremes.- Maximum discharge during year, 504 second-feet Dec. 11 (gage height, 5.10 fe.et), from rating curve extended above 190 second-feet; minimum, 0.4 second-foot Aug. 28. 1922-38: Maximum discharge, that of Dec. 11, 1937; minimum, 0.1 second-foot during periods when reservoir gate was closed. Remarks.- Records excellent. Storage in Silver Lake was 3,360 acre-feet Sept. 30, 1937, and 3,420 acre-feet Sept. 30, 1938. In addition to water released through dam and over spillway, some water escapes from Silver lake through porous rock formation. The discharge at this station combined with that for seepage from Silver Lake near Kirk- wood (see p. 321) represents practically entire outflow from Silver Lake. Hating table, water year 1937-38 (gage height, in feet, and discharge, in second-feet) 0-5 0-2 2.2 110 1.0 2.4 130 3.0 2.6 151 6.0 2.8 173 .9 9.5 3.0 196 1.0 14-0 3.2 220 1.2 25 3.4 248 1.4 3.6 276 1.6 3.8 304 1.8 4.0 332 2.0 4.3 376 Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 61 6.5 3.9 34 25 35 22 65 318 84 2.2 3.0 2 63 5.5 3.3 34 25 35 -31 65 332 101 1.4 2.4 3 61 5 3.0 34 25 35 38 64 339 96 1.4 1.6 4 55 4.5 2.4 33 3S 37 63 368 63 1.2 .9 5 58 3.9 2.0 32 25 35 37 62 368 31 1.6 1.4 6 62 3.0 2.4 31 25 35 35 61 346 59 2.4 32 7 61 2.6 2.4 31 25 34 33 61 339 52 1.8 67 8 62 2.2 2.2 30 25 34 31 63 332 67 1.6 65 9 61 1.8 40 ' 28 25 33 31 65 325 46 1.8 63 10 60 1.4 25 32 30 69 304 16 1.0 63 11 57 1.8 249 25 32 30 70 232 14 1.6 63 12 55 2.0 376 27 25 31 31 74 61 14 3.3 63 13 53 2.0 255 26 24 31 31 154 8.5 14 2.4 65 14 51 2.0 156 26 24 30 31 304 77 14 1.6 68 15 49 2.0 110 26 24 30 31 332 162 10 2.0 70 16 46 2.2 83 26 24 29 31 325 220 9.5 3.0 80 17 43 3.6 64 26 24 29 32 318 220 14 2.0 88 18 39 3.6 55 26 24 28 36 297 185 26 1.4 88 19 35 3.6 53 26 24 27 40 269 101 1.6 86 20 31 4.2 50 26 23 26 44 2DO 62 11 3.3 85 21 28 4.8 46 26 23 26 49 178 12 4.5 2.4 84 22 24 4.8 43 26 23 26 54 184 4.2 4.2 1.8 81 23 21 4.8 40 26 27 25 58 241 16 4.2 .8 80 24 18 5 40 25 36 25 61 283 32 3.9 1.0 79 25 15 5 39 25 36 24 63 304 43 3.3 1.8 78 26 13 5 38 25 36 24 63 311 97 3.3 1.0 77 27 11 4.8 38 2S 36 63 332 122 4.5 .8 76 28 10 4.5 37 25 36 22 64 325 126 4.8 .9 75 29 9 4.5 36 25 22 65 311 208 4.2 1.8 72 50 8 4.2 36 2S 22 65 297 105 3.3 2.2 70 31 7 35 25 22 304 2.8 2.4 Second- Run-off in Month foot -days Maximum Minimum Mean acre-feet Oct 1,227 63 7 39.6 2,430 HOT 110.8 6.5 1.4 3.69 220 Deeember...... 2,043.4 376 2.0 65.9 4,050 C 14,150.8 376 - 38.8 28,060 Jan uary 855 34 25 27.6 1,700 Feb 744 36 23 26.6 1,480 Har 896 35 22 28.9 1,780 Apr 1,267 65 22 42.2 2,510 Hay 6,071 332 61 196 12,040 Jun 5,464.7 368 4.2 182 10,840 Jul 786.5 101 2.8 25.4 1,560 Aug 55.5 3.3 .8 1.79 110 Sep 1,827.3 88 .9 60.9 3,620 Water year 1937-38 ...... 21,348.2 376 .8 58.5 42,340 Peak discharge.,- Dec. 11 (3 p.m.) 504 sec. -ft. ; June 4 (10 p.n 392 sec.-ft.; June 5 (10 p.m.) 376 sec.-ft. AMERICAN RIVER BASIN 321 Seepage from Silver Lake near Kirkwood, Calif. Location.- Staff gage, lat. 38°40', long. 120°07', in SWi sec. 32, T. 10 N., R. 17 E., Just upstream from road crossing and half a mile northeast of Silver Lake Dam. Alti tude, about 7,200 feet. Records available.- October 1929 to September 1938. Extremes.- Maximum discharge observed during year, 19 second-feet July 28; no flow during most of year. 1929-38: Maximum discharge observed, 25 second-feet June 9, 1930; no flow during most of each year. Remarks.- Records fair. Gage read once daily. Ho flow when Silver Lake gage height is below 14.0 feet. This is a record of largest amount of seepage from Silver Lake through the porous rock formation; other seepage from Silver Lake is of little or no consequence. The discharge at this station combined with that for Silver Lake outlet near Kirkwood (see p. 320) represents practically entire outflow from Silver Lake. Rating table, water year 1937-38 (gage height, in feet, and discharge, in second-feet) 1.0 1.5 6 1.1 1.6 9. 1.2 1.1 1.7 13 1.3 2.0 1.8 17 1.4 3.6 Discharge, In second-feet, water year October 1937 to September 1938 Day Oot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 2.2 17 16 9.5 2 2.0 17 16 9.5 3 2.0 17 16 9.5 4 2.2 17 15 9 5 2.2 17 15 9 6 2.3 17 15 9 7 2.5 17 15 8 8 2.3 17 15 7.5 9 2.0 17 14 7.5 10 1.9 17 14 6 11 1.8 17 13 5.5 12 2.0 17 13 5 13 1.8 17 13 4.6 14 2.3 17 13 3.6 15 5.5 17 13 3.0 16 6 17 12 2.3 17 6.5 17 12 1.6 18 6.5 17 12 1.3 19 6.5 17 12 1.1 20 6.5 17 12 .8 21 6.5 18 12 .5 22 8 18 12 .2 23 9.5 18 12 0 24 11 17 12 0 25 12 17 11 0 26 12 18 11 0 27 15 18 11 0 28 15 19 11 0 29 17 18 10 0 30 17 17 10 0 31 - 17 9.5 - Second- Run-off in Month foot-days Maxinun Minimum Mean aore-feet October...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Calendar year 1937 ...... 1,147.4 18 0 3.14 2,280 0 0 0 0 0 0 0 0 0 0 March...... 0 0 0 0 0 April ...... 0 0 0 0 0 May...... 0 0 0 0 0 190.0 17 1.8 6.33 377 July...... 535 19 17 17.3 1,060 397 . 5 16 9.5 12. 8 788 114.0 9.5 0 3.80 336 Water year 1937- sa...... 1,236.5 19 0 3.39 2,450 322 AMERICAN RIVER BASIN Silver Fork of South Fork of American River near Kyburz, Calif. Location.- Water-stage recorder, lat. 38°45', long. 120°17', in NEt sec. 34, T. 11 N., R. 15 E., 2 miles upstream from mouth and 2 miles southeast of Kyburz. Altitude, about 4,850 feet. Gage lowered 0.10 foot Aug. 7, 1938. Drainage area.- 108 square miles. Records available.- August 1924 to September 1938. Average discharge.- 14 years, 191 second-feet. Extremes.- Maximum discharge during year, 5,450 second-feet Dec. 11 (gage height, 8.30 feet), from rating curve extended above 2,250 second-feet on basis of velocity-area studies; minimum, 38 second-feet Aug. 24 (gage height, 1.68 feet). 1924-38: Maximum discharge, that of Dec. 11, 1937; minimum, 1.4 second-feet Dec. 6, 1929. Remarks.- Records good except those for period of missing gage heights, Dec. 29 to Jan. &, and period of ice effect, Feb. 2-4, which were computed on basis of one discharge measurement and records for South Fork of American River near Kyburz and are fair. No diversions. Storage in Twin Lakes (capacity, 21,250 acre-feet) and Silver Lake (capacity, 8,900 acre-feet). Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 77 73 82 115 88 316 285 638 1,860 463 Ill 52 2 78 78 81 112 88 368 313 631 1,910 463 106 52 3 84 79 V9 109 88 354 364 544 1,910 424 100 50 4 70 78 81 103 88 322 381 596 2,060 350 100 49 5 70 78 81 99 93 294 288 694 1,860 273 94 54 6 74 78 91 93 96 282 256 745 1,380 264 88 59 7 74 78 92 88 96 276 248 830 1,420 245 81 92 8 73 84 89 86 98 270 285 990 1,420 264 82 84 9 74 84 74 81 105 264 361 1,200 1,380 276 85 81 10 78 84 1,330 79 108 259 389 1,340 1,290 237 65 81 11 78 92 3,840 78 106 273 434 1,470 1,100 205 69 81 12 78 86 1,470 75 106 512 420 1,760 806 160 80 81 13 81 78 701 75 103 575 354 2,210 680 161 66 82 14 92 85 393 74 98 402 343 2,520 790 205 59 84 15 81 70 310 88 100 357 389 2,470 934 163 58 87 16 65 70 250 85 106 354 458 2,360 1,050 170 58 95 17 60 108 214 96 109 343 659 2,210 1,010 214 58 106 18 54 69 194 92 109 322 1,090 2,060 854 176 58 106 19 55 61 176 92 109 316 1,200 1,810 624 207 58 106 20 69 105 161 86 108 372 1,290 1,610 490 194 48 108 21 69 91 156 89 105 343 1,340 1,520 448 221 43 109 22 74 47 149 93 102 319 1,290 1,660 415 160 42 112 23 72 41 135 92 105 313 1,240 1,860 458 152 39 112 24 66 48 147 86 125 326 1,160 1,960 525 156 42 114 25 74 43 142 89 168 303 918 2,010 496 158 47 116 26 79 51 138 91 282 297 790 2,110 537 172 48 114 27 79 62 136 93 294 297 870 2,110 537 192 49 117 28 78 62 130 95 282 310 902 1,960 537 176 51 116 29 77 61 126 93 297 894 1,760 680 154 53 103 30 75 74 122 88 282 715 1,810 631 143 54 109 31 74 118 84 279 1,810 133 54 Second- Minimum Mean Run-off in Month foot-days Maximum acre-feet Oct 2,282 92 54 73.6 4,530 HOT; 2,198 108 41 73.3 4,360 Dec ember...... 11,288 3,840 74 364 22,390 C 79,230 3,840 . 217 157,200 Jan 2,799 115 74 90.3 5,550 Fell 3,465 294 88 124 6,870 Mar 10,197 575 259 329 20,230 Apr 11...... 19,926 1,340 248 664 39,520 Ma, 49,258 2,520 544 1,589 97,700 Jun 30,092 2,060 415 1,003 59,690 Jul 6,931 463 133 224 13,750 Aug 2,046 111 39 66.0 4,060 Sep 2,712 117 49 90.4 5,380 1ater yoar 1937-3 143,194 3,840 39 392 284,000 Peak discharge.- Dec- 11 (10:30 a. 1.) 5,450 sec.-ft.; May 14 (8 p.m.) 2,910 sec.-ft.; May 15 (7 p.m.) 2,860 aec.-ft. AMERICAN RIVER BASIN 323 Twin Lakes outlet near Kirkwood, Calif. Location.- Water-stage recorder and concrete control, ]at. 38°42', long. 120°03', in SWi sec. 1C, T. 10 N., R. 18 E., 500 feet downstream from main dam and outlet gate of Twin Lakes and 1 mile east of Kirkwood. Altitude, about 7,900 feet. Drainage area.- 12.4 square miles. Records available.- September 1922 to September 1938. (October 1934 to September 1938 Include flow over Twin Lakes spillway). Average discharge.- 16 years, 30.7 second-feet (including flow over Twin Lakes spillway). Extremes.- Maximum daily discharge during year, 239 second-feet June 9, 10; minimum, 1.0 second-foot Dec. 12, 29. 1922-38: Maximum daily discharge, that of June 9, 10, 1938; minimum, 0.2 second- foot (leakage) at various times. Remarks.- Records excellent. No diversions. Storage in Twin Lakes was 15,850 acre-feet Sept. 30, 1937, and 19,100 acre-feet Sept. 30, 1938. Flow over Twin Lakes spillway occurred June 4 to July 10 only. Discharge, In second-feet, water year October 1937 to September1938 Day Oct. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.5 61 68 1.4 1.5 138 102 1.5 145 173 31 27 2 1.5 66 67 1.5 1.5 138 96 1.5 148 172 32 27 3 1.5 66 69 1.5 1.5 138 96 1.5 149 170 32 26 4 1.5 66 71 1.5 1.5 137 53 1.5 155 127 29 30 6 1.5 66 74 1.5 1.5 137 1.4 1.5 179 103 37 33 6 1.5 66 76 1.5 1.5 137 1.4 1.5 217 89 40 19 7 1.5 70 76 1.5 1.5 137 3 .4 2.0 259 70 42 e.9 B 2.9 72 66 1.5 1.5 137 1.4 2. 2 229 99 48 3.1 9 7 71 52 1.5 1.5 137 1.4 2.9 269 118 31 3.6 10 9 71 22 i!s 1.5 137 1.5 3.3 269 118 27 3.3 11 13 71 2.2 1.5 1.5 135 1.5 66 264 76 39 3.1 12 14 70 1.0 1.5 1.5 135 1.7 120 249 46 36 3.1 13 17 66 1.4 1.5 1.5 134 1.7 122 239 75 22 3.1 14 13 58 1.4 1.5 1.5 132 1.5 123 244 92 23 3.1 16 2.0 54 1.4 1.5 1.5 130 1.5 126 256 66 24 2.9 16 1.5 55 1.4 1.5 1.5 126 1.7 128 267 98 23 2.'g2.9 17 1.2 45 1.5 1.5 1.5 128 1.7 129 264 101 26 18 7 40 1.4 1.5 1.5 128 1.7 130 209 82 27 4.1 19 20 40 1.4 1.5 1.5 123 1.5 132 140 90 19 7 20 26 40 1.5 1.5 1.5 123 1.7 134 113 105 12 10 21 35 25 1.5 .5 1.5 124 1.7 134 96 94 12 16 22 40 17 1.5 .5 1.5 123 1.7 134 100 63 11 18 23 40 17 1.5 .5 1.5 120 1.7 135 138 66 14 20 24 45 17 1.4 .5 49 114 1.5 137 161 74 21 4 25 58 26 1.4 .5 145 113 1.5 137 159 76 34 4 26 60 40 1.4 .5 143 112 1.5 137 157 59 26 4 27 60 45 1.4 .5 140 109 1.5 140 164 52 27 6 28 60 45 1.1 .5 138 107 1.7 140 169 56 29 0 29 60 50 1.0 .5 _ 107 1.5 141 210 58 31 4 SO 60 68 1.1 1.5 - 106 1.5 141 196 57 31 9 31 60 - 1.2 1.5 - 102 - 143 - 38 29 - Second- Run-off In Month foot-days Maxjjiiinn HinlasuDi Mean acre-feet October...... 722.1 60 1.2 23.3 1,430 1,564 72 17 52.1 3,100 December...... 670.1 76 1.0 21.6 1,330 9,769.1 159 1.0 26.8 19,370 46.4 1.5 1.4 1.50 92 649.5 145 1.5 23 * 2 1 290 3,906 138 102 126 7*750'769 April...... 387.5 102 1.4 12.9 Hay...... 2,748.4 143 1.5 88. 7 5,450 5,814 269 96 194 11,530 July...... 2, 763 "17^ 38 89 . 1 5,480 865 48 11 27.9 1,720 442.1 33 2.9 14^7 877 Water year 1937-3 3 ...... 20,578.1 269 1.0 56.4 40,820 324 AMERICAN RIVER BASIN El Dorado canal near Kyburz, Calif. Location.- Water-stage recorder, lat. 38°46', long. 120°19', in SEi 29, T. 11 N., R. 15 E., 400 feet downstream from intake and 2 miles west of Kyburz. Altitude, about 4,100 feet. Records available.- October 1922 to September 1938. Average discharge.- 16 years, 96.1 second-feet. Extremes.- Maximum daily discharge during year, 165 second-feet June 24, 27, 28, 30; minimum daily, 1.1 second-feet Apr. 19-22. 1922-38: Maximum daily discharge, that of June 24, 27, 2B, 30, 3938; no flow at times in most years. Remarks.- Records excellent except those for period of ice effect, Dec. 24-28, which were computed on basis of gage heights and weather records and are fair. Canal diverts from left bank of South Fork of American River Just below mouth of Silver Fork of South Fork and 2 miles below Kyburz; water used for power and irrigation. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 99 94 116 80 94 75 84 1.5 111 164 154 150 a 9V 99 115 80 94 74 84 1.5 112 159 154 150 3 103 100 111 80 94 74 84 1.5 112 157 156 148 4 111 98 113 80 96 74 84 1.5 121 157 154 144 6 94 96 111 80 94 74 84 3.2 123 156 145 149 6 94 96 118 87 94 74 84 1.5 124 157 149 146 7 96 96 118 94 94 74 84 1.5 124 157 144 151 8 94 101 118 94 94 74 84 1.5 124 157 144 150 9 92 101 100 94 83 74 84 1.5 124 157 148 150 10 94 100 102 94 94 74 84 6.5 124 157 130 150 11 94 116 61 94 94 74 84 1.3 124 156 136 150 12 93 110 4.8 94 94 74 88 4.2 124 157 147 149 13 95 100 34 94 92 74 94 1.3 124 157 150 149 14 103 111 78 94 94 74 94 31 133 157 150 150 16 123 96 78 94 94 74 94 56 146 157 150 150 16 120 96 79 94 94 74 94 88 146 156 150 150 17 100 119 79 94 94 74 60 116 146 156 147 150 18 90 107 79 94 94 74 1.3 124 146 157 148 149 19 80 98 79 94 94 74 1.1 125 145 157 146 148 20 88 119 80 94 94 75 1.1 125 147 157 150 145 21 86 118 80 94 94 74 1.1 125 154 157 150 145 22 94 99 80 94 94 74 1.1 124 164 157 149 150 23 90 90 80 94 94 74 57 123 164 154 143 148 24 84 99 80 94 94 73 51 123 165 154 145 150 25 90 89 79 94 94 74 1.5 98 164 154 149 150 26 95 93 79 94 94 74 1.5 111 164 154 149 148 27 94 101 78 94 94 74 1.5 112 165 154 149 150 28 90 99 78 94 93 74 1.5 112 165 154 149 151 29 89 98 78 94 _ 74 1.5 111 164 154 149 141 30 96 111 78 94 _ 74 1.5 112 165 154 149 145 31 96 - 79 94 - 78 111 154 150 - Second- Run-off In Month foot-days HaTipi\'flp Minimum lie an acre-fset 2,964 123 80 95.6 5,880 3,050 119 89 102 6,050 2,642.8 118 4.8 85.3 5,240 34,346.8 156 0 94.1 68,130 2,837 94 80 91.5 5,630 2, 620 96 83 93 .6 5,200 March...... 2, 299 JI 74.2 4,560 April ...... 1, 570.7 94 1.1 52.4 3,120 Kay...... 1,955.5 125 JL-1 *O* 63.1 4,214 165 111 140 sjseo July...... 4,845 164 154 156 9,610 4,583 156 130 148 9,090 4,456 151 141 149 8,840 Watsr year 1937-3 38, 037 . 0 165 1.1 104 75,460 AMERICAN RIVER BASIN 325 Alder Creek near Whitehall, Calif. Location.- Water-stage recorder, lat. 38°45', long. 120°E2', in SWi sec. 36, T. 11 N., R. 14 E., three-quarters of a mile upstream from mouth and2miles southeast of White hall. Altitude, about 4,000 feet. Drainage area.- 22.8 square miles. Records available.- October 1922 to September 1938. Published records include diversions by feeder riume. Average discharge.- 16 years, 30.0 second-feet. Extremes.- Maximum discharge during year, 710 second-feet Dec. 11 (gage height, 4.50 feet), from rating curve extended above E40 second-feet on basis of velocity-area studies; minimum, 0.1 second-foot Oct. 1, Nov. 8-10. 1922-38: Maximum discharge, about 1,760 second-feet (revised on basis of 1938 rating curve) Mar. 25, 1928 (gage height, 7.1 feet, from floodmark); minimum, 0.1 second-foot at times in 1924, 1926, 1931, 1933-38. Remarks.- Records good. They include computed flow in feeder flume that diverted just above station to El Dorado canal Nov. 15 to Mar. 31, May 19 to June 14, June 28. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 *0.1 0.3 2.9 21 24 76 90 224 208 20 3.2 0.6 2 .2 .3 2.9 28 24 144 95 228 206 18 3.2 .6 3 .6 .3 2.9 23 18 142 106 2O6 200 17 3.2 .6 4 .3 .3 2.9 21 26 110 124 202 192 15 3.0 .5 B .3 .3 2.9 20 25 92 132 206 174 13 2.7 .5 6 .2 .3 2.9 20 24 78 120 213 160 12 2.5 .5 7 .2 .3 2.9 18 23 70 117 221 146 11 2.0 .5 8 .2 .1 2.9 18 23 64 119 233 135 9.5 1.5 .5 9 .2 .1 3.3 17 27 58 136 262 122 7.5 1.8 .5 10 .2 .1 199 16 35 56 156 290 110 7 1.5 .5 11 .2 .6 515 16 33 66 163 314 96 6.5 1.5 .4 12 .2 .8 270 15 34 188 172 348 85 6 1.3 .4 13 .2 .5 160 14 35 276 156 390 74 6 1.0 .4 14 2.3 1.8 118 15 32 198 148 426 66 6 1.0 .4 IE 3.0 2.4 88 21 31 157 154 426 61 6 1.0 .4 16 1.0 2.3 70 18 29 147 166 400 57 6 1.0 .4 17 .6 15 58 29 29 132 195 366 51 6 1.0 .4 18 .6 7-5 48 27 28 123 266 336 44 6 1.0 .4 19 .5 4.5 42 27 27 118 307 304 40 6 1.0 .6 20 .4 6 36 24 27 183 334 280 37 5.5 1.0 7 21 .4 10 33 24 28 159 348 252 34 5.5 1.0 .6 22 .3 5 30 24 28 137 338 247 31 4.9 1.0 .5 23 .3 4.8 28 24 29 132 334 252 28 4.9 .8 .4 24 .3 6.5 27 22 32 141 319 261 27 4.5 .8 .4 25 .3 4.9 25 23 33 130 286 272 25 4.1 .8 .4 26 .3 4,0 24 23 35 121 257 277 21 6 .8 .4 27 .3 3.0 22 24 36 118 250 267 20 8 .7 .6 28 .3 2.5 22 24 38 116 247 248 18 6 .7 .8 29 .3 2.5 21 24 107 242 226 22 4.5 .7 .7 30 .3 2.7 21 22 96 233 215 21 4.1 .6 .6 31 .5 20 20 93 208 3.6 .6 Second- Run-off in Month foot-days Maximum Minimum Mean acre-feet Oct 14.9 3.0 0.1 0.48 30 HOT 89.7 15 .1 2.99 178 Dec 1,903.5 515 2.9 61.4 3,780 C alendar year 1937...... 14,347-2 515 .1 39.3 28,460 Jar nary 655 29 14 21.1 1,300 Fel 813 38 18 29.0 1,610 Mai 3,828 2'76 56 123 7,590 Api 6,115 348 90 204 12,130 Ma3 8,605 426 202 278 17,070 Jur 2,511 208 18 83.7 4,980 Ju3 246.1 20 3.6 7.94 488 Auj 43.9 .6 1.42 87 Sej 15.2 .8 .4 .51 30 1Tater year 1937-2 24,840.3 515 .1 68.1 49,270 Peak discharge.- Dec. 11 (9:30 a.m.) 710 sec.-ft.; May 14 (8 p.m.) 465 sec.-ft.j Hay 15 (8 p.m.) 452 see.-ft. #Gage height missing; discharge Interpolated- 326 AMERICAN"RIVER BASIN Plum Creek near Riverton, Calif. Location.- Water-stage recorder, lat. 38°45', long. 120°26', In SEi sec. 32, T. 11 N., R. 14 E., It miles upstream from mouth and 2 miles southeast of Riverton. Altitude, about 4,100 feet. Drainage area.- 6.8 square miles. Records available.- November 1922 to September 1938. Average discharge.- 16 years, 8.07 second-feet. Extremes.- Maximum discharge during year, 315 second-feet Dec. 11 (gage height, 3.10 feetJ, from rating curve extended above 110 second-feet; minimum, 0.2 second-foot Oct. 1, 2, 4. 1922-38: Maximum discharge, 635 second-feet Mar. 25, 1928 (gage height, 4.10 feet), from rating curve extended above 100 second-feet; minimum, 0.1 second-foot at times during 1924-26, 1930-35, 1937. Remarks.- Records good except those for periods of ice effect, Feb. 1-6, 9-14, Feb. 19 to Mar. 3, which were computed on basis of one discharge measurement and weather records and are fair. No diversions above station. Discharge, in second-feet, water year October 1937 to Septenber 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0. 2 0.8 1.2 12 40 41 55 8.5 1.6 0.5 0.4 2 .2 .9 1.2 3.4 14 90 46 62 8 1.5 .4 .3 3 .3 1.0 1.2 3.7 18 80 51 55 7.5 1.5 .4 .3 4 .2 1.0 14 68 82 49 6.5 1.5 .4 .3 6 .3 1.0 l!l 3.0 11 51 126 46 6.5 1.5 .4 .3 6 .3 1.0 1.0 2.8 11 42 83 41 5.5 1.5 .4 .3 7 .3 1.0 1.0 11 38 71 39 5 1.5 .4 .3 8 .3 1.0 1.0 2^6 11 34 69 39 4.5 1.4 .4 .3 9 .3 1.0 1.4 12 32 77 41 4.3 1.4 .3 .3 10 .3 1.1 54 2.2 24 30 77 41 4.1 1.3 .3 .3 11 .3 4.0 195 2.1 23 46 75 42 3.9 1.2 .3 .3 12 .3 75 2.1 160 72 45 3.7 1.1 .3 .3 13 .3 1.5 30 2.1 21 205 63 48 3.4 1.1 .3 .3 14 1.7 2.1 16 C.O 20 105 58 51 3.2 1.0 .3 .3 16 1.5 2.1 5 19 79 55 46 3.0 .9 .3 .3 16 .8 e'.s 8.5 4.5 17 79 57 41 2.8 .9 .3 .3 17 .6 6.5 20 16 69 35 2.6 .8 .3 .3 18 .5 3.6 5 20 16 58 89 30 2.6 .7 .3 .3 19 .5 2.2 4.3 15 16 62 101 26 .7 .3 .3 20 .5 2.8 3.7 149 100 2i4 .7 .3 .3 21 .5 3,0 3.4 10 16 93 93 2.4 .6 .3 .3 22 .6 3.2 10 16 70 83 19 2.2 .6 .3 .3 23 .6 11 16 78 77 18 .5 .3 .3 24 .6 3'.8 3. 0 9 17 107 75 17 2.1 .5 .3 .3 25 .7 3.0 2.8 8 17 83 69 16 1.8 .5 .3 .4 26 2.8 V.5 18 69 SO 16 1.8 .9 .3 .3 27 .8 2.0 2.8 6.5 18 62 55 14 1.6 1.1 .3 .4 28 .8 i.*4 2.8 6.5 19 63 52 13 1.6 .9 .3 .4 29 .8 6 57 52 1.8 .7 .3 .4 30 ,8 1.3 5.5 43 52 11 1.8 .6 .3 .4 31 .8 2,7 9 43 9.5 .5 .4 Second- Run-off In Month foot -days UaxljBiuBi Minimum Mean acre-feet dot 17.5 1.7 0.2 0.56 35 Kov 62.0 5.5 .8 2.07 ]23 Dec 452.4 195 1.0 14.6 897 Calendar year 192 7...... 3,707.4 195 .1 10.2 7,350 Jan 202.5 20 2.0 6.53 402 Fob 461 24 11 16.5 914 Mar 2,290 205 30 73.9 4,540 Apr 11...... 2,126 126 41 70.9 4,220 JCa, 1,023.5 62 9.5 33.0 2,030 Jun 109.7 8.5 1.6 3.66 218 Jul 31.2 1.6 .5 1.01 62 Aug 10.3 .5 .3 .33 20 Sep 9.6 .4 .3 .32 19 «ater year!937-3E 0,795.7 205 .2 18.6 13,480 I eak discharge. - Dec. 11 (7 a.m.) 315 sec. -ft.; March 2 (10 a.m.) 308 sec. -ft.; March 13 (2 a.m.) 31 E sec. -ft. AMERICAN RIVER BASIN 327 Silver Creek at Union Valley, Calif. Location.- Water-stage recorder, lat. 38°52', long. 120°26' f in SEi sec. 20, T. 12 N., R. 14 E., 1 mile downstream from confluence of North and Middle Forks, near lower end of Union Valley. Altitude, about 4,530 feet. Drainage area.- 82.7 square miles. Records available.- October 1924 to September 1938. Average discharge.- 13 years (1924-27, 1928-38), 200 second-feet. ^Extremes.- Maximum discharge during year, 8,560 second-feet Dec. 11 (gage height, 15.28 feet }, from rating curve extended above 2,200 second-feet on basis of velocity-area studies; minimum, 5 second-feet Oct. 1. 1924-38: Ilaximum discharge, that of Dec. 11, 1937 (previously published maximum discharge for Mar. 25, 1928, revised tc 8,040 second-feet); minimum, 1.9 second-feet Aug. 27, 28, 1931. Remarks.- Records good except those for periods of missing gage heights, Dec. 30 to Feb. 87 May 27-31, Sept. 6-30, which were computed on basis of records for Silver Creek near Placerville and South Fork near Ice House and are fair. No diversions above station. Discharge, In second-feet, water year October 1937 to Septembs:r 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 5 6.5 38 90 187 242 707 1,420 272 38 9.5 2 6 6.5 36 95 291 268 707 1,440 264 36 9 3 12 6.5 32 100 294 316 583 1,580 238 33 9 4 7.5 6.5 32 100 244 390 634 1,640 206 30 9 5 6.5 6.5 32 110 194 390 707 1,440 191 28 9 6 6 6.5 35 110 176 320 765 1,310 183 26 8 7 6 6.5 36 120 164 313 825 1,310 185 25 8 8 8 7 38 128 157 333 985 1,180 180 23 8 9 5.5 7 51 139 150 430 1,210 1,010 157 23 8 10 5.5 7 3,840 167 146 472 1,360 870 144 21 8 11 5.5 17 5,560 191 171 502 1,440 745 121 20 8 12 5.5 20 1,070 208 390 502 1,740 617 111 18 8 13 6 15 487 178 634 430 2,160 670 110 17 8 H 16 33 331 178 390 403 2,340 726 104 16 15 26 25 285 173 311 444 2,160 745 106 16 16 17 29 236 173 289 487 2,040 726 100 16 17 14 121 206 158 262 617 1,800 600 99 15 18 12 63 183 154 240 915 1,470 472 94 14 19 11 42 158 150 283 1,110 1,210 444 92 14 20 11 109 134 136 600 1,210 1,160 430 81 13 21 9 121 128 130 378 1,240 1,080 518 71 13 22 9 63 121 131 300 1,240 1,360 458 65 12 23 8.5 63 104 130 311 1,180 1,580 472 62 12 24 7.5 75 131 134 390 1,110 1,640 444 57 13 25 7.5 55 121 134 311 825 1,640 403 52 13 26 7 48 114 130 276 707 1,690 378 54 12 7 27 6.5 44 111 128 268 745 1,640 340 94 11 8 28 6 41 106 128 289 805 1,500 327 106 10 9 29 6 40 104 _ 268 805 1,350 331 59 10 8 50 6 40 114 - 246 707 1,400 300 48 10 8 31 6.5 - 110 - 236 - 1,400 - 42 10 ~ Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet October...... 269.5 26 5 8.70 535 November...... 1,130.5 121 6.5 37.7 2,240 14 , 084 5,560 32 454 27,940 Calendar year 1937 ...... 81,596.4 5,560 4.8 224 161,800 Jan 3,100 100 6,150 Pel 3,903 208 90 139 7,740 Hax 8,846 634 146 285 17,550 April...... 19,458 1,240 242 649 38,590 May...... 42,283 2,340 583 1,364 83,870 23,346 1,640 300 778 46 , 310 July...... 3,748 272 42 121 7,430 568 38 10 18.3 1,130 233.5 9.5 7 7.78 463 Water year 1937-3 3 ...... 120,969.5 5,560 5 331 239,900 Peak discharge.- Dec. 10 (9 i,040 sec.-ft.; Dec. 11 (10 a.m.) 8,560 sec.-ft.; Hay 14 (9 p.m.) 3,010 sec.-ft. 328 AMERICAN RIVER BASIN Silver Creek near Placerville, Calif. Location.- Water-stage recorder, lat. 38°47', long. 120°35', in SWi sec. 13, T. 11 N., R. 12 E., a quarter of a mile upstream from mouth and 12 miles northeast of Placer ville. Altitude, about 2,250 feet. Drainage area.- 176 square miles. Records available.- December 1921 to September 1938. Average discharge.- 16 years (1922-38), 362 second-feet. Extremes.- Maximum discharge during year, 14,600 second-feet Dec. 11 (gage height, 13.8 feet), from rating curve extended above 3,800 second-feet on basis of velocity-area studies; minimum, 30 second-feet Sept. 16-18. 1921-38: Maximum discharge, that of Dec. 11, 1937. Previously published maximum discharge for Mar. 25, 1928, revised to 12,400 second-feet (gage height, 18.0 feet, former site and datum, from floodmarks; 12.8 feet, present datum). Minimum, 5.5 second-feet Sept. 18, 1934. Remarks.- Records good. No diversions. Day Oct. HOY. Dec. Jan. Feb. Har. Apr. May June July Aug. Sept. 1 31 34 90 209 349 570 698 1,660 2,420 611 132 51 2 32 35 93 233 356 1,130 720 1,780 2,470 574 122 47 S 47 35 84 236 359 1,100 820 1,480 2,620 566 118 46 4 46 34 83 213 314 820 1,010 1,520 2,730 499 113 44 6 42 33 82 198 296 654 1,250 1,620 2,420 447 102 43 6 38 33 79 174 314 570 1,010 1,660 2,180 425 98 41 7 35 32 82 176 320 526 952 1,740 2,180 429 94 39 8 35 32 87 174 314 487 952 1.860 2,000 429 89 38 9 34 32 94 170 380 458 1,100 2,270 1,820 386 83 38 10 34 32 5,220 174 578 436 1,220 2,570 1,660 359 81 37 11 34 53 9,500 172 795 472 1,280 2,680 1,440 317 77 35 12 34 74 2,730 172 499 1,100 1,280 3,060 1,190 288 74 34 13 34 52 1,160 172 425 2,000 1,160 3,680 1,160 274 66 34 14 56 76 770 170 411 1,310 1,100 4,230 1,280 268 65 32 16 90 80 632 254 380 1,010 1,130 4,090 1,340 268 65 31 16 62 64 526 233 339 980 1,220 3,630 1,340 263 65 30 17 52 237 450 407 314 870 1,380 3,420 1,280 268 65 30 18 51 172 407 400 323 770 1,860 2,950 980 260 64 30 19 49 101 352 352 323 870 2,270 2,470 925 241 64 31 20 42 118 305 299 314 2,130 2,520 2,220 820 230 64 34 21 41 287 280 288 317 1,410 2,680 2,080 980 201 63 31 22 38 151 268 299 326 1,100 2,620 2,320 925 187 63 31 23 36 134 246 329 342 1,070 2,470 2,780 898 181 63 31 24 34 202 241 266 352 1,340 2,420 2,840 925 174 63 31 25 34 152 246 280 352 1,100 2,000 2,900 845 170 63 31 26 34 118 220 271 352 980 1,740 2,900 795 166 62 32 27 33 109 218 274 349 898 1,740 2,900 745 233 61 35 28 33 100 215 298 356 925 1,820 2,570 676 260 60 41 29 33 98 206 285 845 1,820 2,220 676 187 57 39 30 34 94 210 241 745 1,660 2,320 698 158 55 38 31 34 206 308 698 2,320 141 53 Seoond- Mean Run-off In Month foot-days Max-bnun Minimum acre-feet Oat 1,262 90 31 40.7 2,500 Not 2,804 287 32 93.5 6,560 Dec 25,382 9,500 79 50,340 C 158,254 9,500 26 434 313,900 Jar 7,716 407 170 249 15,300 Pet 10,449 795 296 373 20,730 Mai 29,374 2,130 436 948 58,260 Api 45,902 2,680 698 1,530 91,050 Maj 78,790 4,230 1,480 2,542 156,300 Jui 42,418 2,730 676 1,414 84,130 Ju3 9,460 611 141 305 18,760 AUJJ 2,364 132 53 76.3 4,690 Bej 1,085 51 30 36.2 2,150 1 ater year 1937-3 257,006 9,500 30 704 509,800 Peak discharge.- Dec. 10 (11 a.m.) 8,130 sec.-ft.; Dec. 11 (12:30 p.m.) 14,600 sec.-ft. ; May 14 (1 p.m.) 5,260 sec.-ft. AMERICAN RIVER BASIN 329 South. Fork of Silver Creek near Ice House, Calif. Location.- Water-stage recorder, lat. 38°49', long. 120°22', in SWi sec. 1, T. 11 II., R. 14 E., half a mile upstream from Peavine Creek, 1-J miles northeast of Ice House, and 8 miles northeast of Riverton. Altitude, about 5,300 feet. Drainage area.- 28.4 square miles. Records available.- October 1924 to September 1938. July to October 1922 at site 1 mile upstream. Average discharge.- 14 years, 67.0 second-feet. Extremes.- Maximum discharge during year, 2,200 second-feet Dec. 11 (gage height, 5.80 feet), from rating curve extended above 540 second-feet on basis of velocity-area studies; minimum, 0.8 second-foot Oct. 1. 1924-38: Maximum discharge, that of Dec. 11, 1937; minimum, 0.1 second-foot Aug. 21 to Sept. 6, 1931. Remarks.- Records good. Discharge for periods of ice effect, Nov. 29 to Dec. 8, Dec. 24 to Jan. 3, Jan. 6-9, Jan. 15 to Feb. 26, Mar. 17, computed on basis of weather records and records for stations on nearby streams.- No diversions. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.8 1.8 9 20 14 30 38 147 592 131 22 5.5 2 1.3 1.8 9 20 14 34 42 143 613 128 21 5 S 3.2 1.8 8 20 14 36 48 126 644 121 20 5 4 2.0 1.8 8 20 14 32 55 135 692 102 18 5 5 1.8 1.8 8 20 14 30 53 151 639 92 16 5 6 1.5 1.8 9 19 14 29 49 166 597 87 16 4.6 7 1.3 1.8 9 19 14 28 48 183 584 90 14 4.6 8 1.2 1.8 9 19 14 28 52 222 548 94 14 4.6 9 1.2 1.8 12 19 14 27 62 294 500 84 13 4.6 10 1.2 1.8 900 19 16 26 66 372 455 76 12 4.6 11 1.2 3.2 1,620 18 20 28 71 420 376 64 11 4.2 12 1.2 2.6 442 18 26 44 73 489 280 55 10 4.2 13 1.2 3.5 149 17 24 61 72 626 292 53 9.5 3.8 14 3.86' 8 87 17 22 53 67 715 336 54 9 3.4 15 7.5 70 17 22 50 70 661 359 54 8.5 3.4 16 4.1 8 54 17 22 47 77 618 356 57 8.5 3.0 17 9.5 24 47 17 22 46 93 584 300 62 8 3.0 18 8 15 43 17 22 45 130 496 229 58 8 3.0 19 5 12 38 17 22 45 166 420 203 49 7.5 3.4 20 4.1 20 33 17 22 63 264 393 185 46 7.5 3.0 21 3.5 30 31 16 22 54 330 372 220 42 7 3.0 22 3.2 22 30 16 22 45 315 455 203 42 7 2.8 23 2.6 21 26 16 22 44 300 532 210 38 7 2.8 24 2.3 21 27 16 24 48 272 568 217 38 6.5 2.8 25 2.3 18 25 16 25 43 194 588 194 35 6.5 2.8 26 2.3 16 24 15 25 41 160 601 183 38 6.5 2.8 27 2.0 14 23 15 26 40 164 605 166 52 6 3.0 28 1.8 12 22 15 26 43 180 556 149 43 6 3.4 29 1.8 11 21 15 _ 40 191 512 166 35 6 3.4 SO 1.8 10 20 15 . 38 160 536 151 28 5.5 3.0 31 1.8 - 20 15 - 37 - 544 - 23 5.5 - Second- Run-off in Month foot-days Maximum Minimum Mean acre-feet October...... 85.0 9.5 0 .8 2.74 169 November...... 296.8 30 1.8Q " 124' 589 3,833 1,620 7,600 26,890.6 1,620 .5 73.7 53,340 537 20 15 17.3 1,070 February...... 558 26 14 19 «9 1,110 March...... 63 26 40.5 2, 490 April ...... 3)862 330 38 129 7,660 May...... 13 £30 715 126 427 26 240 10)539 692 149 355 2l)lOO July...... 1 971 131 23 63 .6 3,910 '323.0 22 5 .5 10.4 641 112.7 5.5 2.8 3.76 224 Water year 1937-38...... 36,702.5 1,620 .8 101 72,800 Peak discharge.- Dec. 10 (1:30 p.m.) 1,650 sec.-ft.; Dec. 11 (12:30 p.m.) 2,200 see.-ft.; June 3 (9 p.m.) 888 sec.-ft. 330 AMERICAN RIVER BASIN Firmon Reservoir outlet near Placerville, Calif. Location.- Staff gage and sharp-crested weir, lat. 38°48', long. 120°46', In SEi sec. 16, T. 11 N., R. 11 E., 400 feet downstream, from Finnon Reservoir, It miles upstream from Jaybird Creek, and 10 miles northeast of Placerville. Altitude, about 2,450 feet. Records available.- October 1922 to December 1937 (discontinued). Average discharge.- 15 years, 3.15 second-feet. Extremes.- Maximum daily discharge during period, 22 second-feet Nov. 5-28; no flow at times in October and November and none in December. 1922-37: Maximum discharge, 106 second-feet Mar. 21, 1925 (gage height, 2.60 feet); no flow during some periods of nearly every year. Remarks.- Records good. Staff gage read once daily. Water diverted into reservoir from One Eye and Slab Creeks; outflow used by Pacific Gas & Electric Co. for power. Gage- height record furnished by Pacific Gas & Electric CO. Discharge, In second-feet, water year October 1937 to September 1938 Day Cot. HOT. Dec. Jan. Feb. Kar. Apr. Hay June July Aug. Sept. 1 20 0 S SO 0 3 20 0 4 20 16 6 20 22 6 20 22 7 20 22 e 20 22 9 20 22 10 20 22 11 20 22 12 11 22 15 0 22 14 0 22 15 0 22 16 0 22 17 0 22 18 0 22 19 0 22 20 0 22 21 0 22 22 0 22 23 0 22 24 0 22 25 0 22 26 0 22 27 0 22 28 0 22 29 0 8 30 0 0 31 0 - Second- Maximum Minimum Mean Run-off In Month foot-days aore-feet October...... 231 20 0 7.45 458 552 22 cf 18.4 1,090 0 0 0 0 0 Calendar year 1937...... 1,144.6 22 0 3.14 2, £60 Jar Fet March...... April...... Kay...... July...... Hater year AMERICAN RIVER BASIN 331 American River flume near Camino, Calif. Location.- Water-stage recorder, lat. 38°46'', long. 120°42', In SWi sec. 25, T. 11 N., R. 11 E., 300 feet upstream from Iowa Canyon Creek, 1 mile downstream f;oa iiverslon dam, and 3 miles northwest of Camino. Altitude, about 1,710 feet. Records available.- November 1922 to September 1958. Average discharge.- 16 years, 89.3 second-feet. Extremes.- Maximum daily discharge during year, 176 second-feet June 30; no flow Nov. 23-27, Feb. 11-14. 1922-38: Haximum daily discharge, that of June 30, 1938; no flow at times in each year. Remarks.- Records excellent. Flume diverts water from South Fork of American River in SWt sec. 24, T. 11 N., R. 11 E., which is used to develop power in SWi sec. 20, T. 11 N., R. 11 E., Just upstream from Rock Creek, at which point water is returned to South Fork. Discharge, In second-feet, water year October 1937 to September 193B Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 138 130 91 95 100 94 120 150 150 167 162 145 2 159 67 92 95 100 94 121 150 122 164 160 153 3 157 43 91 102 98 94 128 150 171 164 159 148 4 164 19 91 104 98 94 123 149 16B 164 155 160 6 159 20 91 102 98 94 131 150 16 B 162 152 151 6 146 22 91 95 104 94 128 152 169 160 151 140 7 151 20 92 95 9B 94 122 150 169 160 152 145 8 152 19 92 95 9B 94 120 150 167 159 148 144 9 148 19 96 97 94 124 150 168 160 150 145 10 144 19 90 96 69 94 127 150 168 155 150 145 11 138 19 82 96 0 94 125 147 168 150 148 158 12 145 20 95 97 0 93 124 14 B 16 B 146 149 144 13 144 20 93 98 0 91 141 148 169 145 144 138 14 151 19 94 99 0 91 144 147 170 147 148 140 16 162 20 94 100 14 90 144 146 171 154 14B 143 16 158 20 93 100 25 93 145 146 172 165 14B 136 17 148 41 97 101 20 91 146 147 172 166 145 142 18 147 37 94 100 20 92 150 147 172 166 145 139 19 140 51 94 100 20 92 14B 14B 171 165 144 145 20 132 51 94 101 19 91 148 135 170 167 145 141 21 136 52 94 102 19 98 149 147 172 169 145 142 22 131 21 94 102 19 105 150 148 172 167 142 142 23 131 0 94 102 20 104 148 149 175 166 142 134 24 125 0 94 103 B6 120 148 150 175 164 142 138 25 125 0 94 104 94 128 145 148 175 167 140 161 26 122 0 94 102 94 131 148 14 B 175 169 142 140 27 128 0 94 108 94 12B 149 14 B 175 169 111 148 28 119 56 94 102 95 128 149 148 174 167 158 156 29 126 90 94 101 125 150 148 175 166 154 160 30 126 91 95 100 122 148 149 176 165 148 154 31 116 95 100 121 149 164 14B Second- Run-off In Month foot-days M*H7C5|ffVpn Minimum Mean acre-feet Oct 4,368 164 116 141 8,660 HOT 986 130 0 32.9 1,960 Dec 2,679 97 B2 '92.9 5,710 C alendar year 1937...... 30,611 166 0 83.9 60,730 Jan 3,093 108 99.8 6,130 Fel 1,599 104 0 57.1 3,170 Mai 3,168 131 90 102 6,280 Apr 4,143 150 120 138 8,220 Maj 4,592 152 135 14 B 9,110 JUB 5,067 176 122 169 10,050 Jul 5,019 169 145 162 9,960 AUJ 4,575 162 111 9,070 Sep 4,377 161 134 146 8,680 1 ater year 1937-3B...... 43,866 176 0 120 87,000 332 CACHE CREEK BASIN Clear Lake at Lakeport, Calif. Location.- Staff gage, lat. 39°03', long. 122°55', in SEi sec. 24, T. 14 N., R. 10 W., at municipal wharf on north side of Third Street in Lakeport. Zero of gage is 1,318.59 feet above mean sea level (general adjustment of 1929). Drainage area.- 420 square miles including water surface of lake (65 square miles). Records available.- 1874-1900 (incomplete) and January 1913 to September 1938. Extremes.- Maximum gage height during year, 10.25 feet Feb. 15, 16; minimum, 1.10 feet 1913-38: Maximum gage height, 11.12 feet Jan. 28, 1914; minimum, -3.50 feet Sept. 24-27, 1920. Remarks.- Record of daily gage heights furnished by Clear Lake Water Co. Gage height in feet, water year October 1937 to September 1938 Day Oct. Nor. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.30 1.10 2.35 4.97 6.50 9.30 8.97 7.20 6-55 5.57 4.35 3.05 2 1.30 1.10 2.35 4.97 6.80 9.20 8.87 7.10 6.50 5.55 4.28 3.02 3 1.32 1.10 2.35 5.07 7.20 9.17 8.77 7.10 6.50 5.50 4.20 3.00 4 1.30 1.10 2.35 5.07 7.55 9.02 8.65 7.00 6.50 5.45 4.20 2.98 5 1.27 1.10 2.35 5.07 7.70 9.00 8.60 7.00 6.45 5.42 4.15 2.95 6 1.27 1.10 2.35 5.07 7.85 8.95 8.52 7.00 6.42 5.40 4.10 2.90 7 1.25 1-10 2.35 5.10 8.00 8.85 8.47 6.90 6.40 5.37 4.05 2.88 8 1.22 1.10 2.35 5.10 8.15 8.80 8.37 6.90 6.37 5.30 4.00 2.78 9 1.22 1.10 2.35 5.10 8.70 8.75 8.25 6.90 6.35 5.25 3.95 2.75 10 1.22 1-10 2.90 5.15 8.90 8.65 8.15 6.90 6.35 5.20 3.90 2.75 11 1.22 1.10 3.40 5.17 9.20 8.60 8.02 6.90 6.25 5.20 3.90 2.68 12 1.22 1.17 5.35 5.20 9.37 8.75 7.87 6.90 6.22 5.15 3.85 2.65 13 1.22 1.17 5.52 5.20 9.55 8.77 7.80 6.90 6.20 5.15 3.80 2.62 14 1.22 1.20 5.65 5.20 10-15 8.82 7.70 6.90 6.20 5.08 3.75 2.60 15 1.20 1.22 5.65 5.20 10.25 8.82 7.60 6.90 6.15 5.05 3.70 2.58 16 1.20 1.40 5.67 5.27 10.25 8.90 7.47 6.90 6.10 5.00 3.68 2.58 17 1.20 1.45 5.65 5.37 10.22 9.00 7.37 6.90 6.05 5.00 3.62 2.55 18 1.20 1.47 5.62 5.50 10.22 9.10 7.30 6.90 6.00 4.90 3.58 2.52 19 1.20 1.50 5.60 5.65 10.22 9.10 7.20 6.90 6.00 4.90 3.55 2.50 20 1.20 1.70 5.50 5.72 10.05 9.07 7.15 6.90 6.00 4.85 3.50 2.48 21 1.17 1.97 5.45 5.80 10.00 9.07 7.15 6.90 5.95 4.80 3.45 2.45 22 1.15 2.00 5.45 5.87 9.90 9.07 7.10 6.82 5.90 4.75 3.40 2.42 23 1.15 2.07 5.45 5.92 9.77 9.27 7-15 6.80 5.90 4.70 3.35 2.40 24 1.17 2.17 5.40 5.92 9.67 9.50 7.10 6.72 5.85 4.65 3.35 2.38 25 1.17 2.20 5.35 6.00 9.65 9.70 7.20 6.70 5.80 4.60 3.35 2.38 26 1.17 2.25 5.25 6.00 9.47 9.60 7.20 6.70 5.75 4.55 3.32 2.35 27 1.17 2.27 5.17 6.00 9.37 9.57 7.20 6.62 5.72 4.50 3.30 2.35 28 1.17 2.30 5.10 6.05 9.30 9.50 7.20 6.60 5.70 4.50 3.25 2.35 29 1.17 2.30 5.00 6.10 _ 9.30 7.20 6.60 5.65 4.45 3.15 2.38 30 1.15 2.32 5.00 6.20 - 9.20 7.22 6.60 5.60 4.40 3.10 31 1.12 - 4.97 6.30 - 9.10 - 6.55 - 4.40 3.08 - CACHE CREEK BASIN 353 Cache Creek at Yolo, Calif. Location.- Water-stage recorder, lat. 38°43'30", long. 121°48'25", in Rio Jesus Maria grant, 800 feet upstream from highway bridge and half a mile south of Yolo, Yolo County. Altitude, about 60 feet. Drainage area.- 1,150 square miles (revised). Records available.- January 1903 to September 1938. Average discharge.- 35 years, 513 second-feet. Extremes.- Maximum discharge during year, 19,300 second-feet Dec. 11 (gage height, 29.10 feet), from rating curve extended above 13,000 second-feet; no flow for several months. 1903-38: Maximum discharge observed, 21,100 second-feet Feb. 2, 1915 (gage height, 29.8 feet, present datum, staff-gage reading), from rating curve extended above 13,000 second-feet; no flow during some periods in nearly every year. Remarks.- Records good. Many diversions for irrigation above station; storage in Clear Discharge, in second-feet, water year October 193V to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 57 376 5,040 5,340 4,520 812 8.5 2 0 46 336 6,890 7,570 4,370 1,030 1.2 3 0 41 316 14,700 6,530 4,300 1,000 .2 4 0 36 300 8,610 5,340 4,220 1,000 0 5 0 33 279 7,010 4,900 5,270 955 0 0 ' 6 0 32 251 7,810 4,820 4,440 655 7 0 30 223 6,690 5,890 4,140 276 0 8 0 28 195 7,570 5,270 4,070 188 0 9 0 29 171 10,300 4,900 3,920 142 0 10 0 1,030 144 15,200 4,600 3,840 102 0 11 0 17,300 138 14,900 4,520 3,700 80 0 12 0 9,760 135 9,410 7,630 3,620 67 0 13 0 3,760 132 9,890 9,490 3,540 67 0 14 0 3,200 130 15,800 7,010 3,470 38 0 15 0 2,680 130 9,410 5,970 3,400 27 0 16 0 2,500 138 7,490 6,690 3,320 24 0 17 10 2,320 465 6,530 7,970 3,170 27 0 18 374 2,160 1,140 7,170 6,290 3,170 30 0 19 121 1,990 890 7,810 6,130 ---1,900 28 0 20 65 1,880 1,060 6,530 6,770 1,340 26 0 21 2,000 1,820 740 6,OBO 6,530 1,240 34 0 22 525 1,820 586 5,730 5,810 1,160 142 0 23 237 1,770 510 5,500 6,850 ---930 161 0 24 262 1,770 444 5,270 9,410 -x-466 202 0 25 304 1,720 396 5,120 7,410 -s-446 172 0 26 200 1,720 360 4,970 6,290 *419 154 0 27 150 1,660 332 4,820 5,730 404 161 0 28 115 1,600 328 4,670 5,500 494 128 0 29 91 1,600 328 5,200 470 44 0 50 73 1,550 308 _ 4,970 486 23 0 31 - 975 996 - 4,740 13 Second- Run-off In Month foot -days Maximum Minimum Mean acre-feet October...... 0 0 0 0 0 November...... 4,527 2,000 0 151 8,980 66,917 17,300 28 2,159 132,700 146,657.3 17,300 0 402 290,900 12,277 1,140 130 396 24,350 226,890 15,800 4,670 8,103 450,000 9 490 4,520 6,196 381,000 April...... 80^235 5J 270 404 2,674 159,100 May ...... 7^ 808 1,030 13 252 9 »9 8.5 0 .33 20 July...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Water year 1937-38...... 590,733.9 17,300 0 1,618 1,172,000 Peak discharge.- Dec. 11 (4 p.m.) 19,300 sec.-ft.j Feb. 3 (7 a.m.) 19,100 sec.-ft.5 Feb. 14 (7a.m.) 18,900 sec.-ft. ^Intake not operating} discharge computed from estimated gage heights. 334 CACHE CREEK BASIN North Fork of Cache Creek near Lower Lake, Calif. Location.- Water-stage recorder, lat. 39°0i', long. 122°33', in NEi sec. 31, T. 14 N., R. 6 W., 500 feet upstream from Sweet Hollow Creek, 3 miles upstream from mouth and 7 miles northeast of Lower Lake. Altitude, about 1,050 feet. Drainage area.- 214 square miles. Records available.- July 1930 to September 1938. Extremes.- Maximum discharge during year, 16,000 second-feet Dec. 11 (gage height, 12.98 feet, from floodmarks), from rating curve extended above 7,200 second-feet on basis of velocity-area study; minimum, 0.1 second-foot Oct. 1, 5-30. 1930-38: Maximum discharge, that of Dec. 11, 1937; no flow at times in each year except 1937 and 1938. Remarks.- Records good except those for periods of missing gage heights, Nov. 23 to Dec. 15, July 6 to Sept. 30, which were computed on basis of records for Putah Creek near Guenoc and are fair. Several small diversions above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.1 0.2 1EO 120 1,900 844 600 174 60 15 2 .S 2 110 170 5,540 1,740 536 163 57 15 3 .2 .2 100 174 4,100 1,120 496 156 54 16 4 2 2 95 145 2,780 838 755 149 51 15 6 .1 .2 90 13E 2,200 712 1,010 143 52 14 6 .1 .2 85 120 2,600 824 685 139 48 13 7 .1 .2 80 114 2,540 1,010 605 135 46 8 .1 2 75 106 3,600 898 550 131 41 9 .1 .2 15O 96 5,400 781 514 125 38 10 .1 .5 9,5OO 92 5,340 696 474 122 37 11 .1 .4 8,000 86 3,930 706 435 118 37 12 .1 29 3,000 86 2,860 2,300 402 114 39 13 .1 11 2,000 86 5,910 2,670 374 111 37 14 .1 40 1,100 88 4,720 1,600 336 108 34 16 .1 136 750 114 2,670 1,510 307 103 32 16 .1 301 534 106 1,650 3,250 294 103 28 17 .1 901 439 838 1,080 2,380 281 98 27 18 .1 209 378 576 1,160 1,950 262 93 26 19 .1 149 323 628 975 2,260 251 88 25 7»5 SO .1 2,210 280 580 850 2,860 240 87 24 21 .1 644 E56 472 781 2,OOO 226 84 22 22 .1 318 240 418 763 1,560 214 82 22 23 .1 700 222 365 734 5,270 204 79 20 24 .1 6OO 205 326 734 4,000 206 77 19 25 .1 400 198 294 690 2,490 200 73 18 26 .1 300 179 269 630 1,800 191 70 17 27 .1 250 163 253 576 1,280 182 69 16 28 .1 200 150 256 554 1,050 182 76 16 29 .1 160 141 243 _ 912 180 78 15 30 .1 130 134 222 _ 775 185 71 15 31 2 - 126 1,060 - 675 - 65 - Second- MqytnnjBj Mean Run-off In Month foot-days Minimum acre-feet 3.5 0.2 0. L 0.11 6.9 7,690.5 2,210 2' 256 15,250 December...... 29,2^,5 9,500 75 943 57,960 74,578.0 9,500 L 204 147,900 8,635 1,060 86 279 17,130 February...... 67,267 5,910 554 2,402 133,400 52,761 5,270 675 1,702 104,600 April...... 11, 377 1,010 180 379 £2,570 May...... 3,284 174 65 106 6,510 60 15 32.4 1,930 July...... P7S B 16 ~ 8 .89 546 49.6 1.6 98 21.0 - - .7 42 Water year 1937-2 8...... 181,560.0 9,500 . L 497 360,000 Peak dlacharge.- Dec. 10, unrecorded, discharge greater than on Feb. 2; Dec. 11 (about 3 a.m.) 16,000 aec.-ft.j Feb. S (5 p.m.) 9,380 aec.-ft. PUTAH CREEK BASIN 335 Putah Creek near Guenoc, Calif. Location.- Water-stage recorder, lat. 38°46', long. 122°31', in see. 22, T. 11 N., R. 61 W., just upstream from dam site and 3i miles downstream from highway bridge at Guenoe. Zero of gage is 913.4 feet above mean sea level. Drainage area.- 112 square miles. Records available.- February 1904 to July 1906, July 1930 to September 1938. Extremes.- Maximum discharge during year, 24,100 second-feet Dec. 11 (gage height, 22.7 feet), from rating curve extended above 6,700 second-feet on basis of velocity-area studies; minimum, 2.3 second-feet Oct. 27 (gage height, 1.00 foot). 1904-6; '1930-38: Maximum observed discharge, 24,600 second-feet Mar. 10, 1904 (gage height, 20.1 feet, former datum), from rating curve extended above 14,500 second-feet; minimum, 0.6 second-foot Sept. 30, Oct. 4, 1932. Remarks.- Records good except those for periods of missing gage heights, Dee. 21 to Jan. 12, Feb. 26 to Mar. 7, Mar. 28 to Apr. 5, which were computed on basis of record for station near Winters and are fair. Small diversions above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 3.3 2.7 94 90 2,380 1,000 400 131 41 16 8.5 6 2 3.5 2.7 86 180 5,720 1,800 370 121 37 16 8 6 3 3.3 2.8 7S 180 3,010 1,000 340 114 36 16 8 3.6 4 3.1 2.8 74 130 2,400 800 400 109 36 16 8 6 6 3.1 2.7 68 90 2,840 700 1,100 104 36 14 8 6 6 3.1 2.7 65 85 2,840 900 *530 101 32 14 8 6 7 2.9 2.7 61 85 2,480 1,100 440 96 29 14 8 6 8 2.9 2.8 58 80 3,240 -«-932 386 91 28 13 8 5.5 9 2.9 2.9 210 80 4,280 745 344 90 28 12 6 5.5 10 2.9 3\4 *13,600 75 4,680 618 311 88 28 12 6.5 5.5 11 2.9 61 *11,600 75 3,040 652 287 85 28 12 6 5.5 12 2.9 46 2,420 75 2,240 3,330 269 82 12 7.5 5.5 13 3.0 13 1,160 *72 4,890 2,480 251 78 27 11 7.5 5.5 14 3.3 82 770 72 2,750 1,290 230 75 26 11 7.5 5 16 3.1 97 558 90 1,580 1,050 216 72 26 10 7.5 4.9 16 3.0 120 432 142 1,120 2,510 206 71 24 10 7.5 5 17 2.9 705 344 2,400 910 1,380 196 68 22 10 7.5 4.7 18 2.8 148 287 910 1,580 1,150 184 64 22 9.5 7 4.7 19 2.8 138 240 950 1,000 1,410 176 63 22 9.5 7 4.7 20 2.8 3,780 207 662 845 1,930 168 62 21 8 7 4.6 21 2.7 811 180 461 745 1,120 159 59 21 7 6.5 2-9 22 2 «8 376 160 361 635 1,150 152 56 20 9 6.5 2.8 23 2.7 890 150 292 548 4,320 143 55 18 9 6.5 4.4 24 2.7 750 140 242 470 2,480 146 52 18 9 6.5 4.6 25 2.7 366 130 212 *410 1,380 143 50 18 9 6.5 4.6 26 2.7 246 120 190 390 978 136 49 18 9 6.5 4.6 27 2.5 184 110 176 370 #785 131 49 18 9 6.5 4.9 28 2.7 146 100 198 450 650 132 50 16 8.5 6.5 4.7 29 2.7 122 90 194 550 132 49 16 8-5 6.5 4.4 30 2.8 107 90 171 480 141 47 16 8.5 6.5 4.2 31 2.8 80 2,160 430 44 8.5 6.5 Second- Run-off In Month foot -days MqX^TtTITftl Minimum Mean acre-feet Dot 90.3 3.5 2.5 2.91 179 Hen 9,216.2 3,780 2.7 307 18,280 Dec 33,763 13,600 58 1,089 66,970 C alendar year 193 98,159.0 13,600 2.3 269 194,700 Jan 11,180 2,400 72 361 22,180 Pet 57,843 5,720 370 2,066 114,700 Mar 41, 100 4,320 430 1,326 81,520 Apr 11...... 8,219 1,100 131 274 16,300 Maj 2,325 131 44 75.0 4,610 Jur 756 41 16 25.2 1,500 Jul 341.0 16 7 11.0 676 Aug 220.5 8.5 6 7.11 437 Sej 148.3 6 2.8 4.94 294 1 ater year 1937-3 165,202.3 13,600 2.5 453 327,600 Peak discharge.- Dec. 10 (4 p.m.) 22,600 sec.-ft.; Dec. 11 (3 a.m.) 24,100 sec.-ft.5 Feb. 2 (7 p.m.) 10,000 sec.-ft ^Discharge computed from partially estimated gage heights. 336 PUTAK CREEK BASIN Putah Creek near Winters, Calif. Location.- Water-stage recorder, lat. 38°31', long. 122°05', in NE-i sec. 28, T. 8 N., R. 2 W., 6 miles west of Winters and 8 miles downstream from Capell Creek. Zero of gage is 161.6 feet above mean sea level. Drainage area.- 614 square miles. Records available.- June 1930 to September 1938. 1905-31 at site at Winters, 6 miles downstream; records equivalent except for very low flows. Extremes.- Maximum discharge during year, 39,200 second-feet Dec. 11 (gage height, 24.8 feet), from rating curve extended above 17,000 second-feet on basis of velocity-area studies; minimum, 3.1 second-foot Oct. 1. 1930-38: Maximum discharge, 41,100 second-feet Feb. 4, 1937 (gage height, 25.4 feet), from rating curve extended above 17,000 second-feet on basis of velocity-area studies: minimum, 0.3 second-foot Aug. 23, 24, 26. 27, 1931. Maximum discharge at former site.about 60,000 second-feet Dec. 3], 1913, from rating curve extended above 12,000 second-feet on basis of velocity-area studies. Remarks.- Records excellent for discharge above 15 second-feet and good below, except those for period of faulty intake operation, June 7-23, which were computed on basis of records for station at Guenoc and are fair. Several small diversions above*station provide water for irrigation by pumping. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dao. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 4.1 7 146 174 7,400 2,720 1,280 428 129 40 IE 10 8 5 7 132 196 12,400 6,100 1,120 428 123 39 11 10 3 6 7 118 276 13,100 2,930 1,080 400 117 40 10 10 4 6 7 108 218 8,200 1,970 1,150 387 112 39 11 10 6 6 7.5 100 188 6,100 1,600 3,560 361 108 40 12 10 6 6.5 7.5 94 174 8,600 1,700 1,810 336 104 37 11 10 7 6 7 89 164 5,300 3,950 1,280 324 100 34 9.5 10 8 6 7 84 157 6,640 2,530 1,120 300 96 32 10 10 9 5.5 7.5 88 147 11,400 1,970 1,040 091 92 30 11 9.5 10 5.5 7 20,000 137 14,900 1,660 965 076 88 32 12 9.5 11 5.5 11 29,300 132 13,400 1,520 900 265 84 29 11 9 18 5.5 12 7,120 129 7,400 7,470 860 252 80 28 11 9.5 13 6 10 2,730 125 13,500 8,200 800 238 77 26 11 9 14 7 10 1,560 124 13,000 3,950 780 028 74 24 11 9 16 8.5 10 1,100 137 6,940 2,830 700 218 71 22 11 9.5 16 8 15 840 163 3,950 5,640 68E 007 68 20 11 9 17 7-5 £23 664 3,560 3,040 4,280 664 001 65 22 11 9 18 7 460 560 1,970 5,730 2,930 628 193 62 22 12 9 19 6.5 188 470 2,260 4,930 3,150 593 183 59 19 12 9.6 BO 6.5 3,160 400 1,890 3,160 4,350 560 175 57 19 12 9.5 21 6.5 3,340 348 1,100 0,530 3,150 529 169 55 18 12 10 22 6 800 312 820 0,170 2,530 499 164 53 17 12 9.5 83 6.5 593 296 664 1,850 7,360 470 158 51 17 12 9.5 24 6.5 1,130 276 509 1,600 7,800 466 154 49 17 12 9 25 7 760 271 456 1,400 3,960 442 150 47 18 12 7 26 6.5 445 252 400 1,050 2,830 442 146 44 16 11 7 27 6.5 322 228 361 1,150 0,440 428 142 43 14 10 11 28 6.5 244 212 428 1,080 0,130 414 139 39 16 10 17 29 7 199 198 544 1,890 414 137 41 13 11 13 30 7 168 188 428 1,660 414 136 40 IE 10 11 31 7 180 4,550 1,490 132 11 9.6 Second- Run-Off In Month foot-days MoTJmll». Mlnianna Mean acre-feet Oet 197-6 8.5 4.1 6.37 398 Hoi 12,171.5 3,340 7 406 £4,140 Dec 68,464 29,300 84 2,009 135,800 C 021,370.5 09,300 2.9 606 439,100 Jan nary 22,601 4,650 1E4 729 44.830 Feb 181,110 14,900 1,080 6,468 359,800 Mar 108,680 8,000 1,490 3,506 816, 600 26,100 3,560 414 870 61,770 £; 7,318 428 130 236 14,500 Jim 2,028 109 39 74.3 4,400 Jul 763 40 11 84.6 1,610 Aug 344-0 12 9.5 11.1 680 Sep 096.0 17 7 9.83 585 *atep year 1937-3 430,072.1 29,300 4.1 1,179 853,400 Peak discharge.- Deo. 10 (10 p.m.) 36,600 sec.-ft.; Dec- 11 (8|30 a.m.) 39,800 sec.-ft.} Feb. S ( 11 p.m.) 27,300 sec.-ft NAPA RIVER BASIN 337 Conn Creek near St. Helena, Calif. Location.- Water-stage recorder, lat. 36°29', long. 122°24', In NWi sec. 3, T. 7 N., R. 5 W., a quarter of a mile upstream from highway "bridge, 4 miles southeast of St. Helena, and 6 miles upstream from mouth. Altitude, about 160 feet. Drainage area.- 52.0 square miles. Records available.- November 1929 to September 1938. Extremes.- Maximum discharge during year, 3,470 second-feet Feb. 2 (gage height, 8.8 feet); no flow for several months. 1930-38: Maximum discharge, 4,600 second-feet Feb. 4, 1937 (gage height, 10.3 feet), from rating curve extended above 2,200 second-feet; no flow for several months each year. Remarks.- Records good. Small diversions for irrigation above station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 1.8 8 740 196 89 26 6.5 2.1 2 0 1.8 14 1,250 527 80 22 6 2.1 S 0 1.5 12 752 220 74 20 6 2.4 4 0 1.5 10 1,000 159 180 19 6 2.1 5 0 1.5 9.5 515 133 144 18 5.5 1.8 6 0 1.5 9 434 215 88 18 5.5 1.8 7 0 1.8 8.5 308 207 76 16 5.5 1.8 a 0 1.5 8.5 372 156 69 16 5.5 1.7 9 0 3.8 7.5 793 135 63 15 5.5 1.5 10 0 975 7 1,480 121 57 15 5 1.5 11 0 1,270 6.5 1,040 123 53 14 5 1.2 12 0 276 6.5 708 485 50 14 5 1.0 13 0 100 6.5 1,250 515 48 13 4.5 .7 14 0 61 7 850 300 44 13 4.2 .2 15 0 42 10 490 234 41 13 3.8 0 16 0 31 8 324 472 39 13 2.8 0 17 0 26 84 241 266 38 12 2.6 0 18 0 21 50 658 234 36 11 2.4 0 19 0 18 168 398 230 34 10 2.4 0 20 53 14 88 277 324 32 10 2.2 0 21 27 12 57 217 220 30 9.5 2.4 0 22 9 12 42 167 217 30 9.5 2.4 0 23 8.5 12 34 139 718 29 9 2.2 0 24 12 12 28 119 535 29 8.5 2.0 0 25 8.5 12 25 101 344 27 8 2.0 0 26 6 10 22 91 255 26 8 2.1 0 27 3.9 9.5 21 82 201 25 8 2.1 0 28 3.3 8.5 37 101 162 25 8 2.1 0 29 2.7 8 34 135 25 8 2.1 0 30 2-7 7.5 25 116 30 7.5 2.1 0 31 7.5 678 101 7 0 Second- Run-off In Month foot-days Maximum Minimus Mean acre-feet Oet 0 0 0 0 0 "Sot 136.6 53 0 4.55 271 Dec 2,961.7 1,270 1.5 95.5 5,870 Calendar year 19C 7...... 12,582.3 1,490 0 34.5 24,950 Jan 1,531.5 678 6.5 49.4 3,040 Feto 14,897 1,480 82 532 29,550 Mar 8,256 718 101 266 16,380 Apr 11...... 1,611 180 25 53.7 3,200 Ma; 399.0 26 7 12.9 791 Jim 113.4 6.5 2.0 3.78 225 Jul 21-9 2.4 0 .71 43 Au( 0 0 0 0 0 S«P 0 0 0 0 0 1ater year 1937-J 29,928.1 1,480 0 82.0 59,370 Peak discharge.- Dec. 10 (6 a.m.) 2,260 sec.-ft.5 Dec. 11 (4:30 a.m.) 2,£ sec.-ft.j Feb. 2 (6 p.m.) 3,470 see.-ft. 338 EEL RIVER BASIN Lake Pillsbury at Hullville, Calif. Location.- Staff gage, lat. 39°24', long. 122°57', on line between sees. 14 and 23, T. 18 N., R. 10 W., at Scott Dam on Eel River, at Hullville, 0.3 mile downstream from Rice Fork. Records available.- October 1922 to September 1938. Remarks.- Lake Pillsbury is a reservoir of Pacific Gas & Electric Co. Elevation of spillway, 1,900 feet; elevation of crest of dam, 1,920 above mean sea level. Water is released from lake down Eel River to Van Arsdale Reservoir, from which it is di verted through tunnel to power plant near village of Potter Valley; part is then used for irrigation, and remainder flows into East Fork of Russian River. Table of con- tnets shows storage available for release. Record of daily gage heights furnished by Pacific Gas & Electric Co. Contents in acre-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 55,810 46,140 73,050 72,650 77,360 76,740 74,880 88,670 94,430 91,180 82,250 70,850 2 - - .. 73,460 79,040 78,410 74,680 88,440 94,430 90,950 81,820 _ 3 - 45,220 - 73,460 79,260 77, 160 74, 680 88,670 94,430 90,720 81,390 - 4 - 45,070 - 73,460 76,950 76,320 75,300 89,350 94,430 90,720 81,170 - 5 54,440 - - 73,260 76,320 75,500 76,530 90,030 94,430 90,490 80,960 - 6 _ _ _ 73,050 78,200 75,090 76,320 90,260 94,200 90,260 80,530 _ 7 53,680 - - 72,850 78,830 74,880 75,910 90,720 94,200 90,260 80,310 - 8 - - ~ 72,650 80,960 74,880 76,320 91,180 94,200 90,030 80,310 - 9 - 44, 920 72,450 72,650 79,890 74, 680 77, 160 92,100 94,200 89,800 79,890 - 10 - 44,610 90,950 72,650 80,100 74,470 78,200 92,800 94,200 89,580 79,260 - 11 . 47,550 91,180 72,650 78,830 74,470 78,830 93,720 93,960 89,120 78,830 _ 12 - 48,820 81,390 72,450 77,360 76,740 80, 100 94,430 93, 960 88,890 _ _ 13 - 48,980 77,990 72,450 79,680 78,200 80,740 94, 900 93,720 88,440 - - 14 - 50,270 76,320 72,450 78,410 76,950 80,740 94, 900 93,720 88,220 - - 15 - - 75,500 72,850 76, 740 76,740 80,740 95,140 93,720 87,990 - - 16 _ 51,090 74,880 73,460 74,880 80,530 81,820 94, 900 93,720 87,770 _ _ 17 - - 74,470 77,570 75,090 78,410 83,340 94,670 93,490 87,540 - _ IS _ « 74,060 76,320 75,300 77,570 85,760 94,430 93,490 87,090 _ _ 19 - 70,060 73,860 75,700 74,880 77, 570 88,220 94,430 93,490 86,640 - - 20 - 83,770 73,460 75,090 74,680 79,470 89,580 94,200 93,030 86,200 - - 21 _ 79,680 73,260 74, 680 74,470 77,780 90,490 93,720 92,800 85,980 _ _ 22 - * 73,260 74,680 74,680 77, 570 90,950 93,720 92,800 85,760 74,880 _ 23 - 77,360 73,460 74,470 74,680 85,980 90,950 93, 490 92,800 85,540 - - 24 - * 73,460 74,270 75,300 82,250 90,950 93,490 92,560 85,310 _ _ 25 - - 73,260 73,860 75,700 79,040 90, 490 94, 200 92,560 85,310 - - 26 - _ 73,050 73,660 75,500 76,740 90,030 94,430 92,560 84,210 _ 62,240 27 - - 72,850 73,660 75,500 76,530 89,800 94,430 92,330 83,990 . _ 28 - _ 72,850 73,660 75,090 76,120 89,800 94,670 92,100 83,560 _ .. 29 - - 72,850 73,660 76,910 89,580 94, 670 91,870 83,340 - - 30 - - 72,850 73,660 - 75,300 89,120 94,670 91,640 82, 900 - - 31 " - 72,650 75,500 - 75,090 - 94,430 - 82,680 - - EEL RIVER BASIN 339 Eel River at Hullville, Calif. Location.- Water-stage recorder, lat. 39024', long. 122°58', in NEi sec. 22, T. 18 N., R. 10 W., half a mile downstream from Scott Dam, half a mile upstream from Soda Creek, and half a mile west of Hullville. Altitude, about 1,800 feet. Drainage area.- 289 square miles. Records available.- November 1922 to September 1938. Average discharge.- 15 years (1923-38), 419 second-feet. Extremes.- Maximum discharge during year, 38,000 second-feet Dec. 11 (gage height, 22.9 feet, from floodmarks), from rating curve extended above 3,000 seccnd-feet on basis of computed flow over Scott Dam; minimum, 29 second-feet Nov. 7, 8, 13. 1922-38: Maximum discharge, that of Dec. 11, 1937; practically no flow at times, owing to regulation. Remarks.- Records good except those for periods of missing gage heights, Dec. 1-14, 17-29, 31, Mar. 7, 8, which were computed on basis of partial graph, an occasional staff-gage reading, and record of flow over Scott Dam ana are fair. See record for Lake Plllsbury, which stores water above station. Gage-height record and results of two discharge measurements furnished by Pacific Gas & Electric Co. Discharge, In second-feet, water year October 1957 to September 1938 Day oot. HOT. Dec. Jan. Feb. Bar. Apr. May June July Aug. Sept. 1 167 174 393 459 3,640 3,330 1,590 1,140 459 176 172 186 2 167 178 350 679 6,140 4,960 1,500 835 445 180 174 192 3 167 178 320 820 6,480 4,260 1,500 670 431 178 176 192 4 169 161 300 711 4,260 3,090 1,930 498 421 176 172 190 S 169 66 280 572 3,210 2,380 3,330 516 411 172 165 188 6 171 31 260 516 5,110 1,960 2,430 516 397 170 152 188 7 171 29 240 480 5,820 1,800 1,800 516 384 170 92 188 8 171 29 220 438 10,200 1,700 1,440 534 354 176 188 188 9 169 55 280 401 7,820 1,590 1,200 455 331 174 198 190 10 167 84 12,800 377 8,000 1,470 1,290 418 310 174 205 190 11 167 46 29,000 354 6,320 1,440 1,320 435 295 174 194 190 12 167 31 12,000 341 4,540 2,780 985 591 283 172 188 188 13 167 29 5,800 325 5,760 5,110 1,110 935 271 172 188 188 14 169 38 3,450 325 6,160 3,980 1,170 1,110 262 172 188 188 15 167 34 2,280 462 3,980 3,580 1,110 1,140 238 172 188 188 16 167 40 1,700 674 2,800 6,840 842 1,080 221 174 186 188 17 167 39 1,380 3,660 2,140 6,010 910 985 218 172 186 190 18 167 35 1,180 3,330 1,960 4,540 985 865 216 172 184 190 19 167 91 1,020 2,580 1,800 4,680 1,080 776 209 170 182 190 20 167 5,390 842 2,140 1,590 6,800 1,140 711 205 170 180 188 21 167 4,500 630 1,730 1,500 5,260 1,380 670 184 169 180 188 22 167 2,480 560 1,620 1,620 4,440 1,500 650 142 169 186 188 23 167 2,390 590 1,530 1,800 14 , 700 1,500 553 148 169 194 188 24 167 2,230 640 1,380 2,140 12,800 1,500 389 156 169 192 190 25 167 1,610 640 1,230 2,280 6,800 1,500 283 161 170 190 190 26 167 1,210 570 1,110 2,180 4,540 1,470 414 161 176 188 186 27 167 920 553 1,040 2,050 3,450 1,260 480 163 174 186 182 28 169 708 500 1,040 1,960 2,920 1,170 534 169 174 184 182 29 169 572 462 1,060 2,480 1,170 572 170 172 182 182 30 169 466 452 1,010 2,100 1,140 516 172 172 180 182 31 169 456 1,950 1,840 480 172 178 Second- IHT»4imnn Run-off In Month foot-days ^q?f^TPWII Mean acre-feet dot 5,205 171 167 168 10,320 Hoi 23,844 5,390 29 795 47,290 Dee 80,148 29,000 2,585 159,000 C aleadar year 19: 203,526 29,000 29 558 403,700 Jan 34,344 3,660 325 1T108 68,120 Pet 114,260 10,200 1,500 4,081 226,600 Hai 133 , 630 14,700 1,440 4,311 265,100 Api 11...... 42,252 3,330 842 1,408 83,810 Kaj 20, 267 1,140 283 654 40,200 Jim 7,987 459 142 266 15,840 Jul 5,352 180 169 173 10,620 Au« 5,598 205 92 181 11,100 Sej 5,638 192 182 188 11,180 1 ater year 1937-; 478,525 29,000 29 1,311 949,200 340 EEL RIVER BASIN Eel River at Van Arsdale Dam, near Potter Valley, Calif. Location.- Water-stage recorder, lat. 39°23', long. 123°07', in HEi sec. 30, T. 18 N., R. 11 W., 500 feet downstream from Van Arsdale Dam and 5 miles north of village of Potter Valley. Altitude, about 1,400 feet. Drainage area.- 347 square miles. Records;oras available.-avaiiarue.- October 1927ly^y tto September iyoa.1938. wovemoerNovember J.yuy1909 to aeptemoerSeptember ±y»a1922 '(combined monthly discharge, only, of Eel River at this station and Snow Mountain Water & Power Co.'s tailrace near Potter Valley) and October 1922 to September 1927 at site 1,300 feet upstream, above dam. Average discharge.- 15 years (1922-26, 1927-38), 270 second-feet. Extremes.- Maximum discharge during year, 39,300 second-feet Dec. 11 (gage height, 30.9 feet); from rating curve extended above 16,000 second-feet on basis of computed flow over Van Arsdale Dam; minimum, 0.4 second-foot June 25, 26. 1909-38: Maximum discharge, about 40,000 second-feet Mar. 25, 1928, from rating curve extended above 1,500 second-feet on basis of computed flow over Van Arsdale Dam; maximum gage height, that of Dec. 11, 1937; minimum discharge, 0.4 second-foot Oct. 12, 13, 1931, June 25, 26, 1938. Remarks.- Records for October to July are good; others, fair. Discharge for May 4-8, July 28 to. Aug. 11 computed on basis of one discharge measurement, range of stage, and partial recorder graph. Water is diverted from Van Arsdale Reservoir through ' tunnel to power plant in Potter Valley, after which part is used for irrigation and remainder flows into East Fork of Russian River. Records show flow passing dam down Eel River. Gage-height record and results of two discharge measurements furnished by Pacific Gas & Electric Co. Discharge, In second-feet, water year October 1937 to September 1958 Day Mar. Apr. May June July Aug. Sept. 1 2.6 1.0 270 264 4,020 3,400 1,760 1,020 278 1.0 2.0 3.2 2 2.6 1.1 379 494 6,380 4,820 1,660 732 248 1.6 2.0 4-8 3 2.6 1.6 200 692 6,380 4,350 1,590 562 269 2.0 2.0 7 4 2.6 2.6 166 580 4,460 3,300 2,060 379 217 2.8 2.0 8.5 6 2.6 2.6 153 494 3,600 2,550 3,600 378 222 1.7 2.0 7 6 2.6 80 97 427 5,660 2,180 2,640 378 246 1.1 2.0 7.5 7 2.4 34 81 388 7,230 1,980 2,060 377 202 1.1 2.0 6 8 2.4 30 66 355 9,720 1,860 1,620 376 168 1,2 2.0 5 9 2.3 17 109 262 7,880 1,690 1,250 326 134 2.0 2.0 6 10 2.0 2.4 13,300 295 8,020 1,530 1,280 270 116 2.5 2.0 8.5 11 2.0 3 4 31,100 276 6,500 1,500 1,380 278 118 3.2 2.0 9.5 12 2.0 2 3 13,300 256 4,820 2,730 974 370 120 2.4 1.9 9.5 13 1.9 2 2 6,610 246 6,250 5,180 1,070 672 92 2.4 1.9 10 U 2.3 2 6 4,020 248 6,620 4,240 1,100 905 80 2.4 2.0 12 15 2.7 4 6 2,730 379 4,350 3,910 1,070 951 81 2.4 2.2 12 16 2.6 378 2,060 639 3,100 6,760 773 905 60 3.6 2.2 13 17 2.4 710 1,560 3,880 2,460 6,140 816 794 29 4.4 2.5 13 18 2.4 204 1,220 3,500 2,260 4,820 905 672 29 4.8 2.5 13 19 2.4 547 997 2,730 2,060 5,060 997 580 33 5.5 2.2 13 SO 2.4 7,100 816 2,380 1,720 7,180 1,040 511 31 5 2.0 14 21 2.3 5,880 692 1,830 1,620 5,540 1,220 478 11 4.0 1.7 12 22 2.2 2,930 616 1,620 1,760 4,800 1,440 456 3.6 3.2 1.1 9 S3 2.2 2,930 580 1,500 1,940 14, 500 1,470 403 1.7 2.4 1.7 6.5 2* 2.2 2,670 461 1,220 2,260 12,800 1,470 285 .6 2.0 2.5 6 25 2.0 1,930 580 1,020 2,460 7,040 1,440 109 .4 1.8 3.5 6 26 1.6 1,320 511 882 2,300 4,820 1,410 225 «4 2.0 4.2 6 27 1.4 952 494 752 2,140 3,700 1,200 290 .6 2.0 4.5 6 28 1.4 728 324 752 2,100 3,100 1,070 346 1.0 2.0 4.2 7.5 29 1.2 520 325 794 2,640 1,040 379 .6 2.0 3.8 7 30 1.4 273 370 712 2,260 1,040 340 .8 2.0 4.8 6.5 31 1.0 373 1,920 1,980 301 2.0 4.2 Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet Oat 66.7 2.7 1.0 2.15 132 H07 29,259.4 7,100 1.0 975 58,040 December...... 84,560 31,100 66 2,728 167,700 Calendar year 1937...... 185,288.1 31,100 1.0 508 367,500 Jan 31,787 3,880 246 1,025 63,050 Feb 120,070 9,720 1,620 4,288 238,200 Mar 138,360 14,500 1,500 4,463 274, 400 Apr 11...... 42,445 3,600 773 1,415 84,190 Hay 15,048 1,020 109 485 29,850 Jun 2,793.7 278 .4 93.1 5,540 Jul 78.5 5.5 1.0 2.53 156 Aug 77.6 4.8 1.1 2.50 154 3ep 255.0 14 3.2 8.50 506 Vater year 1937-3 464,800.9 31,100 .4 1,273 921,900 EEL RIVER BASIN 341 Eel River at Scotia, Calif. Location.- Wire-weight gage, lat. 40°29', long. 124°06', In sec. 7, T. 1 N., R. 1 E., at Wildwood Bridge, half a mile north of Scotia. Altitude, about 50 feet. Drainage area.- 3,070 square miles. Records available.- December 1910 to February 1915, October 1916 to September 1938. Average discharge.- 25 years (1911-14, 1916-38), 5,929 second-feet. Extremes.- Maximum discharge during year, 257,000 second-feet Dec. 11 (gage height, 55.1 feet, gage reading at crest), from rating curve extended above 49,000 second-feet on basis of velocity-area studies; minimum, 82 second-feet for parts of day on Sept. 11, 21, 22. 1910-15; 1916-38: Maximum discharge observed, about 290,000 second-feet Feb. 2, 1915 (gage height, 55.5 feet), from rating curve extended above 114,000 second-feet; minimum, 10 second-feet Aug. 12-14, 1924. Remarks.- Records good. Storage above station in Lake Plllsbury; water diverted above station for power and irrigation near village" of Potter Valley. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. D«o. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 112 194 8,340 6,940 38,700 17,900 14, 200 8,000 3,060 620 178 100 2 257 203 7,220 8,060 63,600 28,100 12,600 8,000 2,900 580 185 98 5 574 240 6,420 11,200 79,200 31, 400 11,300 7,440 2,750 496 171 95 4 657 234 5,640 9,460 58, 100 29,300 11,900 6,620 2,900 510 164 95 5 574 234 5,140 7,500 51,300 25,300 30,100 5,600 2,750 503 164 92 6 453 212 4,900 6,680 86,400 21, 500 24,900 8,120 2,600 503 160 90 7 419 223 4,660 6,420 90,600 18,300 17,200 4,890 2,460 468 160 95 8 392 212 4,420 5,640 113,000 14,800 15,200 5,120 2,460 447 164 92 9 328 316 3,980 5,140 76,800 13, 200 13,900 5,120 2,190 414 157 90 10 298 574 50,800 4,660 78,000 11,900 12, 900 5,360 2,060 382 136 90 11 262 4,900 240,000 4,200 73,400 11,000 11,900 5,360 1,820 364 132 85 12 229 11, 500 152,000 3,980 54,900 13,900 11, 600 5,360 1,710 414 135 90 13 212 6,420 72,100 3,760 82,000 30,600 10,700 5,850 1,600 370 132 90 14 234 9,180 41, 500 3,760 95,000 34,800 9,800 7,720 1,600 364 126 88 16 504 14,700 27 , 900 8,060 55,400 37 , 900 8,900 8,300 1,500 364 126 85 16 460 12,500 20,900 14,700 37,900 90,200 9,200 8,600 1,400 353 126 90 17 440 56,200 16,000 35,600 28,900 69,500 10,400 7,720 1,400 320 126 90 18 614 36,500 13,100 41, 000 S4, 200 44, 400 11,900 6,620 1,300 310 123 95 19 574 43,400 10,900 34,700 84, 900 49, 300 11,900 5,360 1,150 290 120 90 20 460 163, 000 9,180 36,000 19,700 74,000 12,600 4,660 1,100 280 123 85 21 304 91,100 8,060 26,300 17,200 57,000 11,300 4,220 1,060 270 110 85 22 175 41,000 7,220 22,800 17,600 40,700 10,700 4,220 965 256 105 85 29 212 42,900 6,680 23.500 17,600 126,000 10,100 3,800 965 252 105 85 24 280 49, 800 6,420 15,700 18,600 150,000 10, 100 3,800 920 238 105 90 25 280 35,600 6,680 14, 100 17,900 76,300 10,100 3,600 875 234 105 90 26 234 25,100 6,940 12,800 17,200 44,400 9,500 3,410 830 225 105 95 27 212 17,700 6,680 10,900 15,900 37,500 8,600 3,410 785 209 110 182 28 203 13,700 6,680 10,300 14,500 26,500 8,900 3,410 700 209 112 164 29 212 11,200 6,680 14,700 23,000 8,300 3,230 660 205 110 147 SO 246 9,460 6,420 12, 500 _ 19,000 7,720 3,230 660 209 100 160 31 234 7,220 17,000 - 16, 900 - 3,230 - 205 100 - Second- Run-off In Month foot-days Wa-ri-anrm Minimum Mean ao re-feet October...... 10,645 657 112 343 21,110 698,502 163,000 194 23,280 1,385,000 780,780 240,000 3,980 25,190 1,549,000 Calendar year 1937...... 3,212,827 240,000 72 8,802 6,373,000 438, 060 41,000 3,760 14,130 868,900 1,368,500 113, 000 14,500 48,880 2,714,000 March, ...... 1,284,600 150,000 11,000 41,440 2, 548, 000 April...... 368,420 30, 100 7,720 12,280 730,800 May...... 166,380 8,600 3,230 5,367 330,000 49, 130 3,060 660 1,638 97,450 July...... 10,864 620 205 350 21,550 4,077 185 105 132 8,090 3,008 182 85 100 5,970 Hater year 1937-38...... 5,182,966 240,000 85 14,200 10,280,000 Peak discharges.- HOT. 20 (1:30 p.m.) 203,000 eo.-ft.; Dec. 11 (10:45 a.m.) 257,000 sec.-ft.j Mar. 24 (8 a.m.) 169,000 sec.-ft. 342 EEL RIVER BASIN Potter Valley power-house tallrace near Potter Valley, Calif. Location.- Water-stage recorder and wooden control, lat. 39°21', long. 123°07', in NWi sec. 6, T. 17 N., R. 11 W., at power house of Pacific Gas & Electric Co., 3 miles northwest of village of Potter Valley. Altitude, about 1,000 feet. Records available.- October 1922 to September 1938. Average discharge.- 16 years, 195 second-feet. Extremes.- Maximum daily discharge during year, 201 second-feet Aug. 14; no flow Nov. 8 and for part of day on Nov. 7, 9. 1922-38: Maximum daily discharge, 321 second-feet Aug. 26, 1933; no flow for several days in October 1924, January 1934, Nov. 8, and part of day on Nov. 7, 9, 1937. Remarks.- Records good. Water is diverted from Eel River above V».n Arsdale Dam. After passing through power plant, part of it is used for irrigation in Potter Valley and remainder flows into East Fork of Russian River. Water diverted from tailrace above gage for irrigation is included in tables of discharge. Gage-height record, results of two discharge measurements for tailrace, and daily-discharge record for irrigation ditches diverting above gage furnished by Pacific Gas & Electric Co. Discharge, In second-feet, water year October 1937 to September 1938 Day Oot. HOT. Dec. Jan. Feb. Mar. Apr. Maj June July Aug. Sept. 1 186 187 188 192 183 71 77 184 184 194 194 182 2 185 187 74 189 180 68 77 185 184 194 190 183 3 183 187 180 90 179 72 77 183 184 191 193 185 4 189 188 185 121 180 72 77 183 18E 185 196 185 5 190 188 162 130 182 72 77 185 184 187 194 184 6 188 90 184 129 180 72 77 185 184 192 191 186 7 186 .5 184 125 179 73 78 185 183 193 99 186 8 186 0 183 123 180 73 125 185 182 191 195 185 9 186 .3 18E 194 179 73 190 185 183 192 195 184 10 186 14 155 118 184 73 188 184 182 196 196 178 11 186 116 53 123 183 62 189 184 182 190 195 187 12 180 159 40 116 148 73 175 184 184 193 196 184 13 187 47 132 116 176 74 189 184 184 190 199 182 14 179 91 182 123 183 75 189 182 184 192 201 181 15 183 60 182 135 185 75 189 183 186 195 193 183 16 188 134 180 186 186 75 189 183 184 191 183 185 17 189 184 185 186 182 75 189 181 185 192 182 181 18 187 37 190 184 188 75 189 181 188 191 183 182 19 186 98 190 184 189 76 186 180 187 183 182 184 20 186 183 191 185 188 76 184 185 186 193 183 184 21 187 180 191 185 188 75 185 183 186 192 187 184 22 187 180 186 185 188 76 185 182 186 194 187 183 23 187 130 145 189 167 76 185 184 186 194 177 183 24 187 183 147 186 171 76 184 184 188 193 189 186 25 188 183 189 186 155 76 184 185 188 190 185 185 28 187 183 190 180 185 77 184 184 188 189 186 186 27 «186 *184 194 188 186 77 184 183 189 196 183 182 28 *187 *185 182 186 106 77 184 183 191 195 185 185 29 187 *185 122 188 77 184 184 192 192 186 183 SO 188 «189 123 188 77 184 183 193 194 173 183 31 191 125 186 77 186 194 183 Second- Run-off In Health foot-clays Itq x? T^TP Minimum Mean acre-feet Oot 5,778 191 179 186 11,460 NOT 3.932.8 189 0 131 7,800 Dec 4,996 194 40 161 9,910 C 64,448.8 194 0 177 127,800 Januarr 4,996 194 90 161 9,910 Feb 4,960 189 106 177 9,840 Bar 2,296 77 62 74.1 4,550 Apr 4,754 190 77 158 9,430 May 5,692 186 180 184 11,290 Jun 5,569 193 182 186 11,050 Jul 5,948 196 183 192 11,800 Aug 5,761 201 99 186 11,430 Sep 5,511 187 178 184 10,930 ater year 1937-38...... 60,193.8 201 0 165 119,400 ^Discharge computed from p rtial gage-height record, staff gage readings, and record of output of power house. KLAHA.TH RIVER BASIN 343 Williamson River below Sprague River, near Chiloquin, Oreg. Location.- Water-stage recorder, lat. 42°34', long. 121 °52', in sec. 3, T. 35 S., R. 7 E., a quarter of a mile downstream from Sprague River and three-quarters of a mile southwest of Chiloquin. Zero of gage is 4,155.66 feet above mean sea level (general adjustment of 1929). Drainage area.- 3,000 square miles. Records available .- June 1917 to September 1938. Average discharge.- 21 years, 840 second-feet. Extremes.- Maximum discharge during year, 7,680 second-feet Apr. 22 (gage height, 7.27 feet); minimum, 425 second-feet Oct. 2 (gage height, 2.24 feet). 1917-38: Maximum discharge, that of Apr. 22, 1938; minimum, 320 second-feet Oct. 14, 1920. Remarks.- Records good except those for periods of missing gage heights, Jan. 26, 27, Feb. 19-27 (computed on basis of weather records and records for Sprague River near Chiloquin) and those for period of shifting control, Apr. 14-17, all of which are fair. Diversions for irrigation above station. Manipulation of gates at dams above station causes fluctuation in flow at times. Water-stage recorder inspected by em ployee of The California Oregon Power Co. Rating tables, water year 1937-38 (gage height, In feet, and discharge In second-feet) (Shifting-control method used Oct. 1 to Apr. 17) Oct. 1 to Apr. 13 Apr. 14 to Sept. 30 2.2 420 2.5 605 4.6 2,980 2.5 585 2.8 830 5.0 3,600 2.8 800 3.1 1,100 5.5 4,420 3.1 1,060 3.4 1,410 6.0 5,300 3.4 1,350 3.8 1,870 6.6 6,380 3.8 1,780 4.2 2,400 7.3 7,680 4.2 2,240 Discharge, In second-feet, irater year October 1937 to September 193S Day Oct. HOT. Dec. Jan. F«b. Mar. Apr. Hay June July Aug. Sept. 1 481 555 685 657 713 ,020 1 400 ,940 1,910 640 551 539 % 440 543 644 678 713 ,120 1 340 ,680 1,880 647 551 539 3 525 531 618 692 699 ,230 1 330 ,660 1,870 640 551 539 4 611 492 604 699 699 ,390 1 430 ,850 1,850 626 557 539 6 555 445 598 644 678 ,500 1 530 ,940 1,320 599 569 533 6 531 498 598 637 671 ,630 1 620 4,680 1,740 593 569 533 7 520 470 598 592 685 ,660 1 820 4,250 1,620 587 575 539 8 520 492 592 611 644 1,590 2 120 3,840 1,520 587 575 539 9 520 520 585 598 671 1,420 2 480 3,520 1,440 612 575 545 10 520 531 630 604 699 1,240 2 680 3,280 1,370 647 575 545 11 520 561 728 611 699 1,160 2 740 3,130 1,290 640 581 551 12 520 537 824 618 713 1,150 2 800 3,060 1,240 593 575 563 13 520 531 856 604 744 1,290 2 940 3,060 1,180 575 581 587 14 531 537 1,020 611 792 1,390 3 360 2,980 1,110 569 581 575 IE 531 531 1,400 644 692 1,450 3 920 3,060 1,OSO 581 581 563 16 543 531 1,910 685 720 1,620 4 340 3,060 1,040 593 575 563 17 537 549 2,240 752 736 1,710 4 590 3,060 992 575 581 563 18 492 664 1,990 744 752 1,840 5 210 3,130 956 569 569 563 19 465 816 1,640 760 720 1,980 5 840 3,280 929 563 533 557 80 498 664 1,370 768 700 1,980 6 560 3,360 893 557 527 551 21 503 637 1,170 776 710 1,940 7 300 3,360 875 575 533 551 82 525 637 1,020 808 700 1,940 7 680 3,200 848 581 545 551 83 531 657 916 800 690 1,960 7 490 3,060 822 575 539 551 84 525 692 760 816 680 1,960 7 110 2,900 782 569 539 551 85 525 692 644 824 690 1,890 6 740 2,610 712 563 539 551 86 525 699 671 840 720 1,710 6 200 2,470 633 557 551 545 87 525 728 664 880 770 1,550 6 200 2,360 654 557 54E 551 88 525 760 744 880 872 1,490 6 110 2,210 654 557 545 557 88 592 760 713 816 1,490 5 660 2,100 654 557 539 557 50 624 728 699 752 1,470 5 300 2,030 647 557 539 563 31 604 678 728 1,440 1,950 557 539 Second- Run-off In Month foot-days Maxlmm Hinijiium He an acre-feet Dot 16,384 624 440 529 32,500 Ho? 17,988 816 445 600 35,680 Dec 28,809 2,240 585 929 57,140 C 260, 348 2,480 406 713 516,400 Jan nary 22,129 880 592 714 43,890 Pet 19,972 872 644 713 39,610 Mar 48,210 1,980 1,020 1,555 95,620 Apr 125,840 7,680 1,330 4,195 249,600 fay 103,090 4,940 1,950 3,325 204, 500 Jim 35,011 1,910 633 1,167 69, 440 Jul 18,198 647 557 587 36,100 i1"8 17,285 581 527 558 34,280 8«p 16,554 587 533 552 32,830 Vater year 1937-38...... 469,470 7,680 440 1,286 931,200 344 KLAMATH RIVER BASIN Upper Klamatti Lake near Klamath Falls, Oreg. Location.- Water-stage recorder, lat. 42°15', long. 121°48', in SWi sec. 19, T. 38 S., R. 9 E., 1 mile upstream from outlet and 2 miles northwest of city of Klamath Falls. Zero of gage Is 4,134.15 feet above mean sea level (general adjustment of 1929) or 4,135.93 feet (Bureau of Reclamation datum). All lake elevations given are referred to datum of Bureau of Reclamation. Records available.- May 1904 to September 1938. Extremes.- Maximum elevation during year, 4,143.78 feet Apr. 30? minimum, 4,138.16 feet Nov. 9. Maximum mean dally elevation, 4,143.45 feet May 2; minimum, 4,138,80 feet Nov. 9. 1904-38: Maximum elevation recorded, 4,144.98 feet about Apr. 20, 1904, de termined from high-water marks; minimum recorded, 4,135.6 feet Oct. 9, 1926, at Buena Vista Landing; maximum and minimum mean dally elevations occurred during periods when no continuous recorder was In operation. Remarks.- Lake elevations, particularly extremes, are very much affected by wind. Con- siderable regulation due to operation of dam at outlet of lake since Apr. 15, 1919. Water-stage recorder inspected by employees of The California Oregon Power Co. In feet, year October 1937 to September 1933 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 39.40 39.63 40.39 41.57 42.19 42.05 42.59 43.39 43.02 42.31 41.37 40.27 2 39.49 39.58 40.37 41.77 42.07 41.89 42.68 43.46 42.97 42.28 41.26 40.26 3 39.41 39.62 40.42 41.70 42.28 42.00 42.52 43.18 42.97 42.24 41.22 40.20 4 39.54 39.60 40.48 41.67 42.32 42.09 42.5 43.29 42.90 42.21 41.15 40.23 6 39.56 39.62 40.47 41.67 42.22 42.12 42.6 43.25 42.90 42.18 41.13 40.22 6 39.65 39.74 40.46 41.69 42.06 42.18 42.54 43.19 42.83 42.12 41.19 40.14 7 39.54 39.46 40-47 41.71 42.33 42.21 42.60 43.17 42.89 42.06 41-10 40.10 8 39.54 39.36 40.46 41.73 42.49 42.23 42.47 43.19 42.89 42.10 41.13 40.13 9 39.54 38.80 40-08 41.76 42.44 42.19 42.62 43.14 42.80 42.08 40.94 40.14 10 39.54 39.01 40.33 41.78 42.27 42.24 42.64 43.16 42.72 42.05 40.91 40.10 11 39.55 39.53 40.69 41.79 42.44 42.10 42.52 43.14 42.61 42.00 40.94 40.07 12 39.55 39.58 40.77 41.80 42. 3E 41.95 42.69 43.09 42.65 42.00 40.97 40.00 13 39.45 39.49 40.83 41.81 42.01 42.15 42.76 43.11 42.67 41.93 40.82 39.96 14 39.46 39.61 40.89 41.71 42.48 42.10 42.56 43.09 42.63 41.84 40.77 39.97 15 39.49 39.62 40.95 41.85 42.48 41.97 42.49 43.05 42.58 41.81 40.74 39.97 16 39.52 39.66 40.93 41.71 42.46 42.31 42.66 43.23 42.69 41.84 40.74 39.91 17 39.69 39.80 41.07 41.89 42.42 42.16 42.66 43.14 42.71 41.82 40.77 39.86 18 39.64 39.86 41.16 41.96 42.42 42.14 42.82 43.05 42.75 41.80 40-74 39.78 19 39.64 39.73 41-23 41.92 42.39 42.55 42.89 43.12 42.62 41.78 40.61 39.73 20 39.62 39.99 41.26 41.96 42.36 42.62 42.87 42.92. 42.65 41.73 40.64 39.74 21 39.66 40.06 41.25 41.93 42.36 42.46 42.89 42.92 42.53 41.67 40.58 39.80 22 39.63 39.68 41.35 42.22 42.32 42.13 42.95 42.96 42.61 41.66 40.46 39.72 23 39.62 40.08 41.28 42.22 42.30 42.58 42.95 42.95 42.47 41.64 40.38 39.69 24 39.62 40.10 41.31 42.25 42.27 42.62 43.02 42.98 42.47 41.58 40-46 39.76 25 39.61 40.15 41.35 42.27 42.25 42.72 43.30 42.98 42.43 41.51 40.47 39.75 26 39.59 40.27 41.27 42.26 42.23 42.69 43.15 42.92 42.43 41.45 40.44 39.72 27 39.62 40.30 41.30 42.27 42.20 42.65 43.09 42.99 42.47 41.40 40.42 39.62 28 39.61 40.30 41.33 42.24 42.18 42.77 43.28 43.00 42.43 41.40 40.41 39.67 29 39.53 40.41 41.38 42.28 _ 42.67 43.41 43.02 42.40 41.37 40.39 39.63 30 39.60 40.42 41.49 42.03 _ 42.67 43.43 43.04 42.36 41.36 40.34 39.67 31 39.64 " 41.56 42.01 - 42.65 - 42.98 - 41.33 40.31 ~ Mote.- Add 4,100 feet to obtain elevations above mean sea level, TJ. S. Bureau of Reclamation datum. Monthly elevation and contents, water year October 1937 to September 1958 Change in contents Elevation Contents in Date during month in feet acre-feet in acre-feet _ 4,139.59 276,200 +7,200 331,900 +55,700 428,200 +96,300 4,142.16 482,000 +53,800 477,700 -4,300 4.142.64 524,300 +46,600 -29 , 200 -88,200 327,200 -83,200 4, 139 . 55 273,600 -53,600 The water year. +4,600 Hote.- To compensate for wind effect, elevation given for last day of any month Is mean of elevations for last 4 days of that month and first 3 days of following month. Contents give those above elevation 4,135 feet. KLAMATH RIVER BASIN 345 Link River at Klamath Falls, Oreg. Location.- Water-stage recorder, lat. 42°13', long. 121°48', in sec. 32, T. 38 S., R. 9 E., Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. Nov. Deo. Jan. Feb. Mar- Apr. May June July Aug. Sept. 1 604 848 759 59 1,490 2,970 3,080 6,100 2,860 1 130 1,440 1,360 Z 889 1,400 842 32 l.£ 90 2,740 3,060 6,160 £ ,850 1 070 I/140 1,120 3 1,400 1,400 589 543 l.E 60 2,130 3,060 5,980 2 ,820 501 1,;140 737 4 1,400 1,390 424 253 1,£ 00 2,120 3,060 6,010 2 ,800 692 1,'140 880 5 1,400 1,380 365 300 1,E 90 2,090 3,080 6,010 2 ",770 1 460 1,330 1,320 6 1,160 1,380 1,030 361 1,870 2,130 3,060 5,830 2,580 290 905 1,380 7 1,010 940 1,020 293 1»E 90 2,130 3,060 5,540 £ ,270 i 070 1,C 50 1,410 8 1,010 1,040 1,050 249 S,C 60 2,130 3,060 5,490 £ ,330 i 010 1,'130 1,410 9 1,000 1,140 916 29 8,4 40 2,280 3,OSO 5,230 £ ,330 967 I,/HO 1,410 10 1,010 1,040 605 603 2,420 2,120 3,080 4,990 2,140 688 1,410 1,230 11 1,020 798 136 653 3,820 2,120 3,100 4,950 1,750 i 430 1,410 1,170 12 1,380 596 19 725 2,E 80 2,100 3,090 4,770 ]L,780 i 320 !, Klamath River at Keno, Oreg. Location.- Water-stage recorder, lat. 42°08', long. 121°58', in SEi sec. 35, T. 39 S., R. 7 E., 2 miles west of Keno and 5 miles upstream from Spencer Creek. Drainage area.- 3,920 square miles (not including Lost River or Lower Klamath Lake Basins). Records available.- June 1904 to December 1913, January 1930 to September 1938. Average discharger- 17 years, 1,598 second-feet. Extremes.- Maximum discharge during year, 6,830 second-feet May 1-6 (gage height, 10.10 feetj; minimum, 77 second-feet Nov. 1 (gage height, 1.83 feet); minimum daily dis charge, 170 second-feet June 19. 1904-13, 1930-38: Maximum discharge, that of May 1-6, 1938; minimum, 35 second- feet Aug. 4, 1934; minimum daily discharge, 60 second-feet May 19, 1934. Maximum discharge known, 9,250 second-feet about May 10, 1904. Remarks.- Records excellent. Diversions for irrigation above station. Lost River diversion canal enters or diverts from Klamath River above station. See records for Lost River diversion near Olene and Diversion from Klamath River to Lost River near Olene. The following diversions, in acre-feet, through Klamath Strait into Lower Klamath Lake were computed by the Bureau of Reclamation from gage openings at Ady: October, 464; November, 230; December, 1,500; January, 498; February, 0; March, 0; April, 0; May, 432; June, 3,200; July, 3,090; August, 633; September, 833; the year, 10,880. Flow regulated by storage in Upper Klamath Lake since 1919 and in Lake Ewauna and Klamath River above Keno since September 1931. Water-stage recorder inspected by employee of The California Oregon Power Co. Rating table, water year 1937-38 (gage height, in feet, and discharge, in second-feet) 2.2 132 4.0 740 6.5 2,350 2.4 172 4.5 1,000 7.0 2,790 2.8 280 5.0 1,290 a.o 3,900 3.2 410 5.5 1,610 9.0 5,210 6.0 1,950 10.1 6,830 Discharge, In second-feet, water year October 1937 to SopteabSr 1938 Day Oct. HOY. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 762 773 842 500 1,810 4,270 4,530 6,670 2,310 696 1,250 1,380 P, 845 1,540 946 496 1,810 4,120 4,400 6,830 2,310 610 1,320 1,250 H 1,540 1,540 944 882 1,800 3,660 4,270 6,830 2,190 340 1,180 830 4 1,610 1,500 548 646 2,150 3,600 4,270 6,830 2.190 368 1,090 790 B 1,610 1,500 442 Y84 2,230 3,480 4,270 6,830 2,230 1,050 949 1,290 6 1,290 1,500 1,060 782 2,150 3,320 4,400 6.830 2,020 935 717 1,440 7 1,120 1,140 1,030 643 2,230 3,100 4,530 6,67C 1,740 742 886 1,440 8 1,120 1,150 1,210 804 2,410 2,990 4,400 6,370 1,740 739 1,160 1,440 9 1,130 1,270 1,220 663 2,790 3,210 4,400 6,220 1,740 762 1,160 1,440 10 1,150 1,220 904 800 2,940 3,040 4,400 5,920 1,690 392 1,150 1,260 11 1,040 1,020 708 896 2,940 3,100 4,400 5,770 1,350 1,100 1,210 1,220 12 1,670 798 884 1,070 3,100 3,100 4,530 5,630 1,320 1,000 1,320 1,380 IS 1,670 386 942 1,150 2,430 3,160 4,400 5,350 1,120 1,050 1,350 1,470 14 1,640 517 1,260 1,070 2,740 3,260 4,400 5,210 846 1,100 679 1,500 IE 1,540 860 1,270 1,020 3,600 3,320 4,400 4,930 910 964 1,320 1,700 Ifi 1,100 855 1,080 280 3,720 3,210 4,400 4,660 878 812 984 1,640 17 855 769 880 792 3,660 3,160 4,270 4,020 576 377 994 1,410 in 1,010 459 875 955 3,840 3,160 4,400 3,540 232 1,030 1,060 1,320 19 1,120 850 686 806 3,780 3,210 4,660 3,160 170 1,330 1,160 1,380 20 1,120 716 434 925 3,780 3,320 5,070 3,320 660 1,440 1,210 1,500 21 1,120 476 434 663 3,720 3,540 5,210 2,700 1,060 1,410 1,200 1,470 22 1,280 733 806 504 3,780 3,660 5,490 2,230 1,140 1,180 1,270 1,270 SB 1,500 798 1,000 492 3,780 4,140 5,630 1,860 933 745 1,470 1,190 24 1,540 448 1,100 1,050 3,840 4,400 5,770 1,410 892 810 1,440 1,040 25 1,500 466 651 1,670 3,900 4,400 6,070 1,630 924 923 1,440 1,150 2fi 1,350 791 480 1,700 3,960 4,400 6,220 2,140 735 950 1,270 1,090 27 1,350 640 992 1,780 4,020 4,400 6,220 2,520 782 989 1,010 1,250 28 1,350 488 1,300 1,780 4,140 4,400 6,520 2,390 1,060 1,290 1,010 1,320 29 1,350 859 1,170 1,780 _ 4,400 6,670 2,390 960 1,350 1,380 1,270 SO 1,160 918 738 1,740 _ 4,530 6,520 2,430 806 1,130 1,440 1,050 31 1,240 - 500 1,740 - 4,530 - 2,390 - 861 1,410 - Second- Mean Run-off In Month foot-days Maxlmusi Mlnimim acre-feat 386 899 53,510 27,336 1,300 434 882 54,220 300,165 2,480 61 822 595,400 996 61,220 Hay...... 1 440 39,180 1,700 790 1,306 77,710 Water year 1937-: 752,055 6,830 170 2,060 1,492,000 KLAMATH RIVER BASIN 347 Klamath River below Fall Creek, near Copco, Calif. Location.- Water-stage recorder, lat. 41°58 ! , long. 122°22', in NEJ sec. 36, T. 48 N., R. 5 w,, 500 feet downstream from mouth of Fall creek, half a mile downstream from Copco 2 plant of The California Oregon Power Co., and 1'mile south of Copco post office. Zero of gage is about 2,310 feet above mean sea level, determined from river profile. Drainage area.- 4,370 square miles. Records available.- October 1928 to September 1938. October 1923 to September 1928 at site aoove Fail Creek. Average discharge.- 15 years, 1,391 aecond-feet (including Fall Creek). Extremea.- Maximum discharge during year, 9,660 second-feet Apr. 27, May 3 (gage height, 7.30 feet), from rating curve extended above 6,400 second-feet; minimum, 88 second- feet Oct. 24 (gage height, 1.09 feet); minimum dally discharge, 268 second-feet Jan. 16, June 19. 1923-38: Maximum discharge, that of Apr. 27, May 3, 1938; minimum, about 10 second-feet above Fall Creek aeveral timea In 1925 and 1926; minimum daily discharge, 83 aecond-feet below Fall Creek Aug. 2, 1931. Remarks.- Records excellent except those for periods of missing gage heights, Jan. 15-24, Sept. 11, 12, which were computed on basis of power-plant recorda and diacharge of Fall Creek and are good. Diversion and regulation above station. Water-stage recorder inspected by employee of The California Oregon Power Co. Rating table, water year 1937-38 (gage height, In feet, and discharge, In second-feet) 1.6 255 3.5 1,970 1.8 360 4.0 2,570 2.0 485 5.0 4,030 2.5 910 6.0 6,210 3.0 1,420 7.0 8,820 Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 2,010 2,020 1,410 279 2,410 4,740 4,810 7,740 2,540 1,380 1,*90 2,310 2 1,150 1,730 1,450 304 2,140 4,940 4,700 7,740 2,950 1,180 1,720 2,130 3 334 1,730 l.OSO 1,370 2,480 3,980 4,600 7,740 2,670 579 1,410 1,330 4 1,450 1,670 411 1,430 2,750 3,750 4,600 7,740 2,440 387 1,400 43S 6 1,920 1,710 607 1,420 2,800 3,740 4,920 7,350 2,250 1,190 1,550 614 6 1,670 1,190 1,400 1,390 2,610 3,740 4,810 7,480 2,710 1,360 1,060 1,780 7 1,770 594 1,380 1,430 2,860 3,620 4,920 7,220 2,330 1,370 299 1,870 8 1,840 1,600 1,490 S54 2,900 3,330 5,030 6,960 2,040 1,350 1,570 1,710 9 1,360 1,840 1,420 273 2,810 3,270 5,030 6,840 1,990 622 1,700 1,780 10 570 1,830 1,380 1,380 2,880 3,340 5,140 6,340 2,050 280 1,690 1,490 11 1,880 628 2,700 1,570 3,510 3,280 5,260 5,970 1,420 1,480 1,610 334 12 2,000 1,300 1,340 1,390 3,730 3,560 5,260 5,850 739 1,490 1,950 1,930 13 1,970 922 1,790 1,390 3,210 3,730 5,140 5,730 1,460 1,480 603 2,180 14 1,770 303 1,710 1,560 3,140 3,890 5,030 5,380 1,410 1,410 344 2,360 16 1,630 1,290 1,560 1,080 2,980 3,680 5,140 5,140 1,400 1,360 1,640 2,2SO 16 1,320 1,540 1,620 268 3,960 3,880 4,920 5,140 1,420 972 1,710 830 17 525 1,420 1,360 1,470 3,740 3,890 4,920 4,600 1,380 438 1,640 S45 18 1,690 1,280 578 1,350 3,090 3,640 5,260 3,730 750 1,570 1,920 494 19 1,510 1,300 530 1,360 3,450 4,050 5,730 3,290 268 1,630 1,710 1,64O 20 1,730 392 1,340 1,320 3,970 4,170 6,210 3,330 1,410 1,660 1,260 1,690 21 1,800 2SO 1,520 1,340 3,990 4,090 5,970 3,190 1,480 1,580 336 1,730 22 1,620 1,360 1,610 655 3,720 4,220 6,340 2,810 1,460 1,720 1,660 1,900 23 1,180 1,370 1,580 282 3,750 4,920 6,340 2,640 1,490 1,310 1,740 1,990 24 300 1,430 1,400 1,710 4,070 5,380 6.5SO 2,320 1,230 284 1,860 1,090 25 1,740 794 302 2,460 4,040 5,260 7,220 1,910 606 1,490 1,860 433 26 1,850 1,320 315 2,110 4,030 5,260 7,430 2,070 284 1,580 1,790 1,840 27 1,890 1,040 1,530 2,080 4,150 4,100 7,480 2,930 1,380 1,530 1,400 1,970 28 1,870 594 1,380 2,420 4,260 5,490 7,480 2,780 1,470 1,500 331 1,900 29 1,920 1,180 1,220 1,640 . 5,380 7,740 2,560 1,420 1,520 1,750 1,870 50 1,120 1,300 1,210 1,010 _ 5,380 7,740 2,850 1,260 924 1,760 1,560 31 573 - 890 2,300 - 5,030 2,770 375 1,740 - Second- Ifq^-lynim Run-off In Month foot-daya Minimum Mean acre-feet 45,962 2,010 300 1,483 91,160 36,957 2,020 280 1,232 73,300 39,513 2,700 302 1,275 78,370 411,921 2,700 92 1,129 817,000 40,895 2,460 268 1,319 81,110 February...... 93,430 4,260 2,140 3 337 185,300 Marcn...... 130,730 5,490 3,270 4,217 259,300 April...... 171,750 7,740 4,600 5,725 340,700 May...... 150,140 7,740 1,910 4,843 297,800 47,707 2,950 268 1,590 94,630 July...... 37,001 1,720 280 1 194 73,390 44,503 1^436 46,318 2^360 334 1,544 91^870 Water year 1937-C 8...... 884,906 7,740 268 2,424 1,755,000 548 KLAMATH RIVER BASIN Klamath River at Somesbar, Calif. Location.- Water-stage recorder, lat. 41°23', long. 123°29', In NEi (revised) sec. 4 (revised), T. 11 N., R. 6 E., 300 feet downstream from Salmon River and 1 mile west of Somesbar post office. Altitude, about 450 feet. Drainage area.- 8,480 square miles. Records available.- October 1927 to September 1938. Average discharge.- 10 years (1927-29, 1930-38), 6,173 second-feet. Extremes.- Maximum discharge during year, 73,700 second-feet Dec. 11 (gage height, 32.3 feet), from rating curve extended above 32,000 second-feet; minimum, 1,280 second- feet (regulated) Sept. 13. 1927-38: Maximum discharge, that of Dec. 11, 1937; minimum, 218 second-feet (regulated) Aug. 26, 1931. Flood of Feb. 21, 1927, reached a stage of 50.8 feet (discharge not computed). Remarks.- Records good except those for period of missing gage heights, Feb. 6-12, which were computed on basis of records for Salmon River at Somesbar and Trinity River near Hoopa, and are fair. Storage, large diversions for Irrigation, and considerable regulation by power plants upstream from station. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 3,100 1,900 8,160 10,300 14,600 22,800 19,300 36,000 18,800 6,070 2,360 2,640 2 3,360 S,740 7,600 9,130 17,400 25,300 18,300 32,000 19,300 5,950 2,640 3,200 5 2,860 2,780 7,190 8,850 18,300 25,900 18,300 28,100 19, 900 5,360 3,200 3,130 4 2,280 2,780 6,670 9,130 17,200 S3. 900 19, 100 25,300 20,400 4,730 2,920 2,430 6 2,280 S,780 5,300 8,850 16,000 21,200 19,900 23,700 20,700 4,270 2,920 1,910 6 3,100 2,780 5,080 8,290 20,000 19,300 19,300 22,800 20,200 4,450 2,920 1,440 7 2,780 2,560 5,780 7,730 26,000 18,300 18,800 22,600 19,900 4,830 2,640 2,300 8 2,780 1,780 5,540 7,470 30,000 16,900 19,900 23,100 18,300 4,830 2,100 2,850 9 2,780 S,360 5,540 6,820 28,000 16,300 21,500 23,700 15,800 4,630 2,300 2,780 10 2,710 6,090 27,000 6,070 26,000 15,800 22,000 23,700 14,600 4,190 2,920 2,7SO 11 1,670 10,000 68,600 6,560 25,000 35,500 2S,000 24,SOO 14,000 3,500 2,990 2,500 12 2,300 6,150 57,000 6,820 24,000 17,200 SI, 500 S6,400 13,100 3,950 2,920 1,830 13 2,860 6,020 33,700 6,560 23,700 21,200 20,400 S9,800 11,900 4,270 3,130 2,160 14 3,260 11,300 25,600 10,000 24,200 21,000 19,300 34,300 12,500 4,450 2,300 2,990 16 3,260 7,880 21,000 15,800 21,800 22,800 19,300 36,200 12,200 4,270 1,8OO 3,200 16 2,940 8,720 16,300 14,000 18,800 35,400 24,200 34,300 11,600 4,190 2,160 3,280 17 2,940 12,800 13,100 14, 000 18,300 30,600 S8,700 30,100 10,6OO 3,800 2,850 2,780 18 S,710 11,800 11,300 18,300 16,600 29,500 34,300 25,900 9,410 3,350 2,780 1,910 19 2,710 35,500 9,410 16,600 14,900 41,300 37,100 22,600 8,570 3,720 3,060 1,680 20 2,710 56,800 8,570 14,900 14,900 36,000 35,100 21,500 7,730 3,800 2,850 2,230 21 2,780 28,900 8,570 14,300 14,600 29,200 34,300 21,000 9,130 3,800 2,640 2,570 22 2,940 18,500 8,290 20,700 15,200 26,700 31,500 21,500 9,410 3,720 1,850 2,570 23 2,780 25,300 8,010 21,000 16,000 37,600 31,200 22,000 9,130 3,720 2,040 2,710 24 S,220 21,300 8,010 16,600 19,100 40,400 30, 400 23,100 8,290 3,350 2,350 2,920 25 1,840 16,700 7,470 15,500 21,500 34,300 29,800 23,400 3,010 2,710 2,990 2,360 26 2,040 14,600 6,430 14,900 21,000 29,800 29,200 23,900 6,950 2,710 2,920 1,690 27 2,780 12,600 6,820 13,400 20,400 27,600 29,200 23,100 6,190 3,280 2,920 2,160 28 2,860 10,800 8,010 13,400 20,400 25,600 29,200 23,700 6,690 3,420 2,570 2,850 29 2,860 9,520 7,730 13,400 24,800 S9,200 19,900 6,950 3,350 1,970 2,920 30 3,100 8,7SO 13,700 11,900 22,600 35,400 18,800 6,690 3,280 2,100 2,850 31 2,710 12,500 11,900 20,700 18,300 2,850 2,710 Second- Month Run-off in foot-days Maximum Minimum Mean acre-feet Oct 84,800 3,860 1,670 2,735 168,200 HOT 362,460 56,800 1,780 12,080 718,900 Dec 443,980 68,600 5,080 14,320 880,600 C 2,709,640 68,600 1,270 7,424 5,374,000 Jan u»ry 373,180 21,000 6,070 12.040 740,200 Feb 563,900 30,000 14,600 20,140 1,118,000 Mareh...... 79B,500 41,300 15,500 25,660 1,578,000 Apr 11...... 767,700 37,100 18,300 25,590 1,523,000 May 78B,000 36,200 18,300 25,320 1,5B7,000 Jim 376,950 20,700 6,190 12,560 747,700 Jul 124,800 6,070 2,710 4,026 247, 500 Aug ust ...... 81,320 3,200 1,800 2.623 161,300 Sep 75,620 3,280 1,440 2,521 150,000 Iater year 1937-3 3 ...... 4,835,210 68,600 1,440 13,250 9,590,000 Peak discharge.- NOT. 19 (2 p.m.) 48,800 see.-ft.j Nov. 20 (9 a.m.) 67,400 see.-ft.j Dec- 11 (3:30 p.m.) 73,700 sec.-ft. KLAMATH RIVER BASIN 349 Sprague River near Chlloquin, Oreg. Location.- Water-stage recorder, lat. 42°35', long. 121°51', in NWi sec. 35, T. 34 S., R. 7 E., li miles east of Chiloquin and 4 miles upstream from Modoc Point canal in take. Drainage area.- 1,580 square miles. Records available.- August 1931 to September 1938. July 1920 to September 1931 at site at Mccreaay ranch, 12 miles upstream; records equivalent except those for extremely low stages. Average discharge.- 17 years (1921-38), 424 second-feet Extremes.- Maximum discharge during year, 6,380 second-feet Apr. 22 (gage height, 7.34 reetj; minimum, 127 second-feet Oct. 2 (gage height, 1.34 feet). 1920-38: Maximum discharge, that of Apr. 22, 1938; minimum daily discharge, 50 second-feet (estimated) May 26, 27, 1926. Remarks.- Records good. Discharge for periods of ice effect, Dec. 25, 26, Jan. 5-11, Feb. 15-17, and periods of missing gage heights, Oct. 22-25, Jan. 25-27, Feb. 19, May 27, 28, June 9, 12-16, 21, 22, 25-27, July 2-14.computed on basis of weather records and records for Williamson River below Sprague River, near Chiloquin. Diversions above station for irrigation; regulation by ponding at irrigation dams. Water-stage recorder inspected by employee of The California Oregon Power Co. Hating tables, water year 193V-38, except periods of loe effect (gage height, In feet, and discharge, In second-feet) Oct. 1 to Apr. 21 Apr. 22 to Sept. 30 1.2 116 3.6 1,580 1.4 170 3.6 1,630 1.4 144 4.0 1,980 1.7 295 4.0 2,010 1.7 255 4.5 2,520 2.0 445 4.5 2,530 2.0 395 5.0 3,110 2.4 690 5.0 3,110 2.4 625 4,460 2.8 970 6.0 4,450 2.8 905 6,220 1,290 7.5 6,700 3.2 1,220 Discharge, In second-feet, water Tear October 1937 to September Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 160 24V 365 375 412 677 1,030 3,820 1,380 318 250 210 2 136 230 332 395 406 781 972 3,700 1,360 320 250 210 S 247 226 309 417 390 890 958 3,760 1,350 315 250 214 4 309 164 296 406 395 1,040 988 3,960 1,330 305 254 214 6 260 147 291 355 370 1,160 1,040 3,890 1,290 290 250 214 6 238 188 286 350 380 1,260 1,110 3,630 1,210 285 250 214 7 238 164 282 305 370 1,290 1,250 3,300 1,130 280 250 218 8 238 191 278 310 350 1,210 1,490 2,870 1,050 2SO 250 218 9 234 217 268 300 365 1,040 1,730 2,640 980 315 250 222 10 226 221 296 300 395 890 1,830 2,420 907 345 246 222 11 221 230 385 300 390 823 1,880 2,260 851 340 250 222 12 221 226 494 314 406 823 1,930 2,160 810 295 250 238 IS 221 226 517 300 439 935 2,140 2,110 760 285 250 259 14 230 226 677 309 472 1,030 2,630 2,110 700 280 250 246 ie 234 221 1,080 340 360 1,080 3,240 2,160 670 290 250 238 16 238 217 1,580 385 370 1,230 3,500 2,160 640 295 250 230 17 234 234 1,880 434 380 1,330 3,700 2,210 599 277 254 230 18 177 385 1,580 434 406 1,400 4,100 2,360 573 277 230 230 19 174 456 1,250 444 390 1,540 4,730 2,480 542 277 198 230 20 206 336 1,010 461 380 1,540 5,470 2,580 518 264 194 226 21 206 327 830 466 390 1,540 6,220 2,580 505 282 206 222 22 225 327 697 478 385 1,540 6,380 2,480 490 282 210 226 23 230 350 595 483 375 1,540 6,220 2,310 462 272 206 226 24 225 380 439 505 370 1,540 5,920 2,160 434 272 206 226 25 225 385 350 510 380 1,490 5,320 2,010 380 272 210 222 26 221 395 380 530 406 1,290 5,020 1,660 325 272 218 222 27 221 428 370 580 461 1,140 5,020 1,740 350 268 214 226 28 221 456 461 565 559 1,120 4,890 1,610 345 264 210 230 29 304 444 422 494 _ 1,120 4,590 1,500 340 259 210 234 SO 314 406 412 444 _ 1,100 4,170 1,450 336 254 210 234 SI 291 - 385 417 - 1,070 - 1,410 - 250 206 - Second- Run-off in Month foot-days MaxiimiBi Kinimon Mean acre-feet October...... 7,125 314 136 230 14,130 8,650 456 147 288 17.160 18,797 1,880 268 606 37,280 144,801 2,030 124 397 287,200 12, 706 580 300 410 25,200 11,152 559 350 398 22,120 March...... 36,459 1,540 677 1,176 72,320 April ...... 99,468 6,380 958 3,316 197,800 fcy...... 77,690 3,960 1,410 2,506 154,100 22,617 1,380 325 754 44,860 July...... 8,880 345 250 286 17,610 7,182 254 194 232 14,2BO 6,773 259 210 226 13,430 Water year 1937-J 8...... 317,499 6,380 136 870 629,800 350 KLAMATH RIVER BASIN Fourmile Lake Reservoir near Odessa, Oreg. Location.- Staff gage, lat. 42°27', long. 122°14', in NWi sec. 9, T. 36 S., R. 5 E., at dam at outlet of Fourmile Lake, 15 miles northwest of Odessa. Gage readings are elevations above mean sea level, irrigation-company datum. Records available.- June 1923 to September 1930, June 1932 to September 1938. Extremes.- Maximum contents observed during year, 16,220 acre-feet May 18 (elevation, 6,003.1 feet); minimum, 9,034- acre-feet Sept. 8, 12, 19 (gage height, 5,994-.7 feet). 1923-30, 1932-38: Maximum contents, that of May 18, 1938; no storage at times. Remarks.- Records fair. Month-end contents October to April, June, July, September interpolated from occasional readings of gage. Water turned out of reservoir is diverted 300 feet below dam into Cascade canal, which conveys it across divide into drainage area above Fish Lake in Rogue River Basin. See records for Cascade canal near Fish Lake. Monthly stage and contents, water year 1937-38 Elevation Contents In Change in contents Date in feet acre-feet during month in acre-feet +812 +83 11,200 +1,692 11, 610 +410 +410 -290 Sept . 30...... 9.144 +37 The water year.. +531 KLAMA.TH RIVER BASIN 351 Cascade canal near Fish Lake, Oreg. Location.- Water-stage recorder, lat. 42°24', long. 122°16', in SEi sec. 30, T. 36 S., R. 5 E., at divide between Rogue River and Klamath River Basins, 3 miles upstream from Fish Lake. Records available.- June 1924 to September 1938 (irrigation seasons only). -Extremes.- Maximum discharge observed during year, 52 second-feet June 18, 21 (gage height, 2.04 feet); no flow at times. 1924-38: Maximum discharge recorded, 60 second-feet June 5, 1934; no flow at times. Remarks.- Records fair except those for May 1-17 (estimated) and those for May 19-26 and June 10-27 (interpolated), which are poor. Water stored in Fourmile Lake Reservoir was released to canal from latter part of May to Aug.7. Canal diverts water from Four- mile Creek in Klamath River Basin and discharges into lava bed li miles above Fish Lake in Rogue River Basin. Entire flow sinks in lava bed, reappearing in springs at head of Fish Lake. Gaging station is 10 miles below point of diversion. Discharge, In second-feet, water year October 1937 to September 1938 Day oot. HOT. Dec. Jan. FeD. Mar. Apr. Hay June July Aug. Sept. 1 V 23 30 22 2 25 30 21 S 28 30 22 4 30 29 21 5 32 29 20 6 34 29 20 7 36 28 10 8 36 28 0 9 5 . 36 28 0 10 27 0 11 27 0 12 27 0 13 44 26 0 14 2Y 0 16 27 0 16 27 0 17 26 0 18 t 6 52 26 0 19 51 25 0 20 51 24 0 21 52 24 0 22 14 51 23 0 23 46 22 0 24 40 22 0 25 34 22 0 26 32 22 0 27 22 32 22 0 28 22 32 22 0 29 22 30 22 0 30 22 30 22 0 31 22 22 0 Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet October...... Fel Bar April...... May...... 313 22 _ 10.1 621 1,165 52 <2On^ 38 *8 2,310 July...... 795 30 22 25 «6 1,580 136 22 0 4.4 270 0 0 0 0 0 The perio i...... 4,781 352 KLAMATH RIVER BASIN "A" canal at Klamath Falls, Oreg. Location.- Water-stage recorder, lat. 42°14', long. 121°48', in NEi sec. 30, T. 38 S., R. 9 E., 300 feet downstream from head gates of canal and 1 mile northwest of Klamath Falls. Records available.- May 1911 to September 1938. Average discharge.- 28 years, 168 second-feet. Extremes.- Maximum discharge during year, 954 second-feet July 20 (gage height, 9.63 feet); no flow Oct. 3 to Apr. 24. 1910-38: Maximum discharge, 1,100 second-feet July 20, 1937; maximum gage height, 10.72 feet June 27, 1925. ' Remarks.- Records good. Canal diverts water from Upper Klamath Lake, in NEi sec. 30, T. 38S7, R. 9 E., for irrigating lands east of Klamath River on both sides of Lost River. Most of return water reaches Lost River. Records furnished by Bureau of Reclamation. Discharge, In second-feet, water year October 1937 to September 1938 Day Got. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 94 0 33 644 803 711 493 S 19 0 51 686 693 786 487 5 0 0 66 732 562 793 455 4 0 0 92 746 498 800 442 e 0 0 136 751 609 777 449 6 0 0 171 824 732 698 447 7 0 0 209 876 788 644 429 8 0 0 249 906 832 684 380 9 0 0 251 906 864 730 394 10 0 0 320 892 829 725 435 11 0 0 406 842 841 728 431 12 0 0 435 686 878 723 447 IS 0 0 411 673 894 642 460 14 0 0 425 632 883 545 461 16 0 0 435 665 896 571 476 16 0 0 491 714 922 648 507 17 0 0 513 758 862 688 540 18 0 0 532 708 918 649 478 19 0 0 581 616 946 621 389 20 0 0 545 633 954 603 361 21 0 0 576 6l6 936 576 336 22 0 0 604 740 925 632 348 23 0 0 636 748 916 612 372 24 0 0 676 742 886 588 381 25 0 23 726 771 901 622 385 26 0 46 744 751 906 620 424 27 0 39 740 780 910 602 440 28 0 39 687 850 860 538 469 29 0 39 646 846 815 500 377 30 0 48 669 812 770 488 258 31 0 660 659 486 Seoond- llay Keno canal at Klamath Falls, Oreg. Location.- Staff gage, lat. 42°13', long. 121°48', in SWi sec. 32, T. 38 S., R. 9 E., 200 feet above penstock leading to west-side plant of The California Oregon Power Co. and a quarter of a mile upstream from bridge over Link River at Klamath Falls. Records available.- October 1923 to September 1938. Average discharge.- 15 years, 201 second-feet. Extremes.- Maximum daily discharge during year, 289 second-feet Oct. 16; no flow at times. 1923-38: Maximum daily discharge, 293 second-feet Feb. 11, 1937. Remarks.- Records good. Discharge determined from record of electrical output of power plant 200 feet below gage combined with record of spill at wasteway above canal gage. Canal diverts water from Upper Klamath Lake at Link River storage dam in SEi sec. 30. Water used for developing power and then returned to Link River in SWi sec. 32. Flow controlled by gates at head of canal. Gage readings and records of electrical output furnished by The California Oregon Power Co. Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Doo. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 272 280 259 5 262 268 267 262 263 275 271 271 2 277 275 264 5 264 267 270 265 266 270 270 265 3 269 275 266 5 279 276 267 261 262 271 269 269 4 269 273 270 5 276 274 266 261 255 275 272 268 6 270 273 265 5 270 276 269 261 254 268 267 175 6 273 273 266 5 272 279 267 260 264 272 273 0 7 266 275 263 5 270 27S 266 263 263 275 269 0 a 273 271 263 6 278 278 269 263 266 274 270 0 9 263 239 248 6 263 276 269 264 268 273 271 0 10 266 247 257 5 265 269 268 268 263 274 268 0 11 263 266 107 5 265 269 267 264 260 274 267 0 12 261 282 2 5 265 265 263 266 266 273 268 0 13 260 276 0 5 266 269 269 265 266 273 271 14 261 280 0 5 267 263 270 264 274 271 272 0 16 280 280 0 6 267 262 267 265 272 270 271 72 16 289 278 0 7 266 262 263 264 268 267 267 176 17 226 273 0 5 260 230 223 263 264 271 266 161 18 272 277 0 5 265 272 275 260 263 271 263 153 19 277 268 0 5 259 276 271 262 263 269 262 131 20 283 271 5 5 263 275 267 262 262 265 263 198 21 283 259 5 0 257 271 266 264 259 269 262 276 22 282 257 5 0 260 268 268 262 260 267 255 278 23 282 272 5 0 263 274 266 268 261 272 259 280 282 273 5 89 266 270 266 266 272 267 262 268 285 263 6 278 270 276 265 263 265 270 265 280 26 283 267 6 266 267 270 262 264 265 269 262 288 27 275 267 5 269 268 272 267 259 263 262 265 285 28 273 267 5 269 268 273 274 251 266 262 269 277 29 274 268 5 270 - 273 271 265 221 261 269 279 272 263 5 264 - 267 265 263 275 266 265 279 277 - 5 263 - 270 - 268 - 268 269 - Second- Run-off In Month foot-days Mqyfromn Minimum Mean acra-feet December...... 2,792 270 0 90 5,540 59,183 293 0 162 117, 400 278 nrlQ 257 279 May...... June ...... 7,889 275 221 263 15,650 275 261 270 16.590 267 4,929 288 0 164 9,780 Water year 1937-2 82,813 289 0 227 164,300 354 KLAMATH RIVER BASIN Lost River diversion canal near Olene, Oreg. Location.- Staff gages above and below head gates at intake of canal at Lost River Bam; water-stage recorder, lat. 42°09', long. 121°42', in SWi sec. 30, T. 39 S., R. 10 E., H miles downstream from intake and 5 miles southwest of Olene. Station was moved downstream about 1 mile in 1931. Records available.- May 1912 to September 1938. Average discharge.- 22 years (1912-15, 1919-38), 113 second-feet. Extremes.- Maximum daily discharge during year, 1,220 second-feet Apr. 6; no flow at times. 1912-38: Maximum discharge, 1,320 second-feet Apr. 11, 1935. Remarks.- Records fair. Discharge computed from daily record of openings and head on gates; water-stage recorder used to indicate changes between readings. Canal diverts water from Lost River in SWj sec. 29, T. 39 S. , R. 10 E., and discharges it into Klamath River to assist in reclamation of bed of Tule Lake. At times direction of flow is reversed and water diverted from Klamath River into Lost River. See record for Diversion from Klamath River to Lost River near Olene. Records furnished by Bureau of Reclamation. Discharge, In second-feet, water 7ear October 1937 to September 1938 Day Oct. HOT. Dea. Jan. Feb. Mar. Apr, May June July Aug. Sept. 1 142 126 177 361 227 1,024 920 901 0 0 166 2 141 121 172 371 219 1,070 885 893 0 0 151 3 139 125 160 378 216 1,153 885 876 0 0 130 4 142 126 152 393 209 1,203 960 8S9 0 0 129 5 145 124 140 399 198 1,099 1,118 820 0 0 81 6 151 121 134 395 175 947 ,220 810 0 0 110 7 197 ISO 131 385 176 823 ,192 788 0 0 127 8 215 116 128 380 180 799 ,128 690 0 0 145 9 211 116 126 370 192 844 ,115 467 0 0 157 10 211 114 123 360 370 882 ,155 370 0 0 148 11 211 113 253 302 367 898 1,144 423 0 0 146 12 195 122 491 187 519 901 1,128 441 0 89 146 13 191 120 980 156 607 939 1,101 372 0 113 146 14 185 116 1,040 149 628 1,038 1,054 347 0 102 158 16 182 115 1,078 136 563 1,019 984 288 0 30 160 16 179 117 949 157 532 917 954 214 0 0 160 17 174 117 828 168 545 944 962 153 0 45 160 18 173 119 736 189 560 901 975 151 48 96 158 19 166 120 676 195 568 906 981 150 190 107 157 20 158 126 400 207 560 1,062 1,005 151 185 106 156 21 150 127 348 210 560 1,164 1,032 146 182 128 154 22 146 130 353 211 620 1,155 1,054 100 120 138 124 23 140 138 365 231 648 1,115 1,048 33 0 113 101 24 139 146 358 251 646 1,048 1,035 0 0 70 96 25 134 157 363 267 680 984 1,032 27 0 70 97 26 134 166 348 279 796 984 1,005 0 0 70 97 27 131 178 358 280 885 1,043 944 0 0 114 126 28 131 184 333 274 957 1,101 909 0 0 154 142 29 131 184 337 264 1,088 922 0 0 154 165 50 128 180 333 251 1,008 917 0 0 149 189 31 128 350 238 957 0 0 162 Second- Run-off In Month foot -days Maximum Minlarujn Mean acre- feet Oot 5,000 215 128 161 9,920 No-7 3,984 184 113 133 7,900 Dec 12,700 1,078 123 410 25,190 C 48,930 1,078 0 134 97,060 January 8,394 399 136 271 16,650 Pet 13,403 957 175 479 26,580 Mar 31,016 1,203 799 1,001 61,520 Apr 30,764 1,220 885 1,025 61,020 May 10,450 901 0 337 20,730 Jun 0 0 0 0 0 Jul 725 190 0 23.4 1,440 Aug 2,010 162 0 64.8 3,990 Sep 4,182 189 81 139 8,290 Water year 1937-3 3...... 122,628 1,220 0 336 243,200 KLAMATH RIVER BASIN 355 Diversion from Klamath River to Lost River near Olene, Oreg. Location.- Water-stage recorder, lat. 42°09', long. 121°42', in SWJ sec. 30, T. 39 S., R. 10 E., 5 miles southwest of Olene; staff gage above rectangular gate at wasteway, 0.4 mile east of recorder. Records available.- April 1931, when diversion began, to September 1938. Extremes.- Maximum dally discharge during year, 470 second-feet June 2; no flow at times. 1931-38:- Maximum daily discharge, 564 second-feet Apr. 13, 1933. Remarks.- Records fair. Discharge computed from record of gate openings and gage readings at wasteway; recorder used as index of changes between readings. Canal was built to divert water from Lost River to Klamath River and thereby aid in reclamation of bed of Tule Lake. See record for Lost River diversion canal near Olene, Oreg. Beginning in April 1931 water lias been diverted at times from Klamath River and released into drain that empties into Lost River, from which It is redlverted for irrigation of lands near Tule Lake, Records furnished by Bureau of Reclamation. Discharge, In second-feet, water year October 1957 to September 1958 Day Dot. NOT, Dee. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 0 385 199 79 2 0 470 141 88 S 0 466 74 160 4 0 457 54 192 6 0 445 85 51 6 0 445 138 70 7 0 407 125 52 8 0 378 107 80 9 0 361 104 130 10 0 289 135 124 11 0 237 154 45 12 0 168 129 0 13 0 132 83 0 14 0 110 53 0 16 0 142 86 0 16 0 181 140 0 17 0 167 180 0 18 0 152 160 0 19 0 89 0 0 20 0 0 0 0 21 0 0 0 0 22 0 0 40 0 23 0 0 160 0 24 0 36 271 0 25 0 61 334 0 26 8 109 390 0 27 133 107 335 0 28 248 110 291 0 29 255 153 217 0 SO 255 199 143 0 31 289 - 101 0 Second- Run-off in Month foot-days Maximum Minimum Mean acre- feet October...... 0 0 0 0 0 0 0 0 0 0 December...... 0 0 0 0 0 Calendar year 1937...... 21,629 506 0 59.3 42 ' 899 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April ...... 0 0 0 0 0 May...... 1,188 239 0 38.3 2,560 6,256 470 0 209 12,410 July...... 4,429 590 0 143 8 - YSO 1,071 192 0 34.5 2,120 0 0 0 0 0 Water year 1937-.sa...... 12,944 470 0 35.5 25,670 356 KLAMA.TH RIVER BASIN Fall Creek at Copco, Calif. Location.- Staff gage, lat. 41°58', long. 122°22', in NEi sec. 36, T. 48 N., R. 5 W., 1,500 feet upstream from mouth and 0.8 mile south of Fall Creek power plant and Copco post office. Prior to Dec. 16, 1937, staff gage 1,000 feet downstream, below small diversion for irrigation and 8-inch pipe line. Records available.- July 1928 to September 1938. Average discharge.- 10 years, 33.5 second-feet. Extremes.- Maximum discharge during year, 240 second-feet (estimated) Dec. 11 (gage height, 2.25 feet, or 2.60 feet at former site and datum, from floodmarks); minimum observed, 26 second-feet July 7, Aug. 13 (gage height, 1.05 foot). 1928-38: Maximum discharge, that of Dec. 11, 1937; minimum, 24 second-feet on many days in period June to September 1937. Remarks.- Records good for January to September and fair for October to December except those for periods of missing gage heights, which are poor. One small canal and one 8-inch pipe diverted water around former gage; no diversions around present gage. Gage readings furnished by The California Oregon Power Co. and Division of Fish and Game, State of California. Rating table, water year 1937-38 (gage height, in feet, and discharge, In second-feet) (Shifting-control method used Oct. 1 to Dec. 15) 1.0 1.2 1.4 Discharge, In second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 27 27 37 34 34 76 59 46 29 28 28 28 2 27 27 «-37 60 37 74 58 44 28 28 28 28 3 27 #2S 37 38 36 62 61 42 28 28 28 28 4 #27 #28 38 35 38 55 69 41 28 28 28 28 e #28 #28 37 35 40 53 72 41 #28 28 28 28 6 - 28 #29 37 33 53 48 63 39 28 28 28 28 7 28 #29 #37 #33 72 47 62 38 27 28 28 29 a 27 #29 37 #32 59 46 61 38 28 28 28 28 9 *27 30 37 32 #60 46 69 37 28 28 28 29 10 #27 #32 #150 30 75 45 68 36 28 29 28 29 11 #27 #40 #200 31 «80 45 68 36 28 28 28 28 12 27 #38 61 31 #60 46 68 36 28 28 28 28 13 #27 #36 47 #32 46 67 66 34 28 28 27 28 14 #27 #35 40 34 42 60 63 35 29 28 #27 28 16 #27 34 38 45 ---39 67 62 35 28 28 27 28 16 #27 37 34 38 36 92 62 34 29 28 27 28 17 #27 44 33 52 36 67 62 33 29 29 28 28 18 27 33 31 49 41 64 64 33 29 28 28 29 19 #27 51 31 41 41 81 69 33 #29 29 28 29 BO 27 #50 #31 40 39 69 68 33 29 28 28 29 SO. #27 41 31 #40 38 62 64 31 29 28 28 28 as #27 38 31 55 40 60 63 32 29 28 28 28 as #28 54 31 42 46 106 61 30 29 28 28 28 24 *28 44 #50 38 54 86 62 35 28 29 28 28 25 28 38 #40 36 #62 86 58 29 28 29 28 28 26 #28 #38 31 35 69 91 54 30 28 28 28 28 27 29 #38 #32 #35 52 98 51 29 28 28 28 29 28 29 #37 32 #35 51 80 50 30 28 29 #28 29 29 28 37 32 35 _ 68 48 30 28 28 28 29 SO #28 #37 60 34 _ 61 48 30 28 28 28 29 31 28 - 35 36 - 59 - 29 - #28 29 - Second- Run-off In Month foot-daj-B Maxijnun IHn^imm Mean acre-feet October...... 851 29 27 27.5 1,690 1,087 54 27 36.2 2,160 December...... 1,435 200 31 46.3 2,850 12,068 200 24 33.1 23,950 1,176 60 30 37.9 2,330 1,376 80 34 49.1 2,730 2,067 106 45 66.7 4,100 April...... 1,853 72 48 61.8 3,680 May...... 1,079 46 29 34.8 2,140 849 29 27 28 »3 1,680 July...... 874 29 28 28^2 1,730 865 29 27 27.9 1,720 850 29 28 28.3 1,690 Water year 1937-3 3...... 14,362 200 27 39.3 28,500 #Gage height missing; discharge estimated on basis of weather records or Interpolated. KLAMATH RtVER BASIN 357 Hyatt Prairie Reservoir near Ashland, Oreg. Location.- Staff gage, lat. 42°10', long. 122°28', in sec. 16, T. 39 S., R. 3 E., at dam of Talent Irrigation District, 3 miles north of Ashland-Klamath Falls highway and 20 miles east of Ashland. Gage readings are elevations above mean sea level (Talent Irrigation District datum;. Records available.- December 1922 to September 1938. Extremes.- Maximum contents observed during year, 17,410 acre-feet May 29 (elevation b,017.37 feet), from extension of capacity table above 5,016.0 feet; minimum observed, 4,887 acre-feet Oct. 2 (elevation, 5,000.3 feet), probably slightly less Oct. 1. 1922-38: Maximum contents observed, that of May 29, 1938; no storage at times. Remarks.- Records fair. Hyatt Prairie Reservoir Dam was constructed in 1922-23 by Talent Irrigation District to store water for irrigation of lands near Ashland and Talent, this water to be diverted through Keene Creek canal. Month-end contents interpolated from gage readings averaging one a week applied to capacity table furnished by Talent Irrigation District, Monthly stage and contents, water year 1937-3 Elevation Contents in Change In contents .Date In feet acre-feet during month In acre-feet +96 ... +610 _ +787 +654 +839 +1, 339 _ +3,129 Water year...... - - +4, 662 358 KLAMATH RIVER BASIN Keene Greek canal near Ashlar.d, Oreg. Location.- Water-stage recorder, lat. 42°09', long. 122°30', in NWi sec. 29, T. 39 S., R. 3 E., 400 feet upstream from short tunnel through Cascade Divide, 2 miles north of Ashland-Klamath Falls highway and 16 miles southeast of Ashland. Records available.- June 1923 to September 1938 (some years incomplete). Extremes.- Maximum discharge during year, 91 seccnd-feet Aug. 2, 3, (gage height, 3.14 feet); no flow at times. 1923-38: Maximum discharge, that of August 2, 3, 1938. Remarks.- Records good except those for periods of missing gage heights, May 1-12, 14, June 2-6, e-20, Aug. 4-11 ( interpolated or extrapolated), and those for May 13, May 15 to June 1, Aug. 16-28(computed on basis of staff gage readings), which are poor. Discharge for May 17 to June 1, June 7, Aug. 16 to Sept. 30 computed by shifting-con trol method. Water released from Hyatt Prairie Reservoir is diverted by this canal from Keene Greek in SEi sec. 20, T. 39 S., R. 3 E., and discharged into Emigrant Creek Basin for irrigation of lands near Ashland and Talent. Negligible flow in canal Oct. 1 to April 30. Stored water released from reservoir May 17 to Sept. 26. Discharge, In second-feet, water year October 1937 to September 1938 Da7 Dot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 20 60 26 2 20 82 24 3 20 60 22 4 20 20 6 r^ 20 20 20 6 20 20 7 . 1.0 ' 13 20 20 8 20 65 21 9 20 21 10 20 21 11 20 22 12 20 70 22 13 1.1 22 70 22 14 1.0 11 26 70 23 16 .8 26 70 23 16 .8 26 65 23 17 23 26 58 23 18 31 26 57 23 19 27 26 58 23 20 25 33 47 23 21 24 9.5 39 38 30 22 23 13 39 36 41 23 24 14 50 34 46 24 23 14 58 33 38 25 36 14 58 32 28 26 45 14 58 31 19 27 37 14 58 30 3.1 28 35 15 58 28 1.6 29 33 16 59 27 .8 30 31 19 59 27 .4 31 30 60 28 Second- Run-off In Month foot-days Maximum Minimum Mean acre-feet Oct 0 0 0 0 0 HOT 0 0 0 0 0 Dec 0 0 0 0 0 Calendar year 1937...... 2,633.0 47 0 7.21 5,214 Jan 0 0 0 0 0 Feb 0 0 0 0 0 Mar 0 0 0 0 0 Apr 0 0 0 0 0 May 462.7 45 .8 14.9 918 Jun 424.5 26 9.5 14.2 842 Jul 1,047 60 20 33.8 2,080 Aug 1,631 82 27 52.6 3,240 3ep 649.9 46 .4 21.7 1,290 water year 1937-38...... 4,215.1 82 0 11.5 8,370 KLAMATH RIVER BASIN 359 Shasta River near Yreka, Calif. Location.- Water-stage recorder, lat. 41°49', long. 122°35', in NEi sec. 24, T. 45 N., R. 7 W., 0.6 mile upstream from mouth and 6 miles north of Yreka. Altitude, about 2,000 feet. Drainage area.- 804 square miles. Records available.- October 1933 to September 1938. Extremes.- Maximum discharge during year, 1,940 second-feet Mar. 23 (gage height, 6.24 feet), from rating curve extended above 650 second-feet on basis of slope-area deter mination and velocity-area studies; minimum, 42 second-feet Sept. 1 (gage height, 2.24 feet). 1933-38: Maximum discharge, that of Mar. 23, 1933; minimum, 3.7 second-feet July 14, 1937. Remarks.- Records good. Storage reservoirs and many irrigation diversions above station. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dee. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 82 135 169 209 311 590 550 477 276 95 140 60 2 112 126 166 311 396 678 519 496 200 91 128 60 3 126 126 163 311 550 910 511 477 240 100 119 56 4 135 126 160 295 590 678 530 418 209 102 114 67 5 133 126 160 279 454 570 550 305 174 121 128 77 6 130 126 160 263 610 515 515 331 135 152 117 91 7 128 126 160 250 855 477 503 314 119 146 88 97 a 126 124 160 234 940 447 507 301 104 128 84 104 9 124 124 160 224 700 530 295 108 106 82 100 10 124 126 407 221 678 400 550 282 121 99 77 97 11 120 150 1,400 221 678 382 570 282 125 97 74 97 12 114 172 1,460 218 590 382 570 279 125 95 77 100 13 116 172 800 218 590 443 570 272 143 99 73 95 14 133 169 488 240 750 454 550 292 163 125 68 84 15 130 160 372 334 725 432 530 375 146 123 73 88 16 130 180 348 321 590 500 511 550 132 132 77 106 17 128 210 295 450 477 511 530 492 128 125 91 119 18 128 186 266 411 4BO 496 590 396 146 122 97 117 19 128 177 244 358 462 500 678 341 154 119 117 125 20 126 219 228 324 469 570 700 308 154 91 114 123 21 124 231 218 304 481 550 678 285 132 86 106 121 22 126 201 215 317 570 530 632 272 106 82 99 123 23 124 338 212 355 610 1,470 590 266 97 84 100 123 24 118 298 215 311 632 1,260 590 269 121 99 104 114 25 118 234 218 298 632 970 610 272 119 95 99 119 26 116 204 231 288 590 800 570 260 117 95 97 125 27 114 189 276 298 570 750 503 269 119 95 95 128 28 112 177 247 311 550 725 465 285 119 168 95 121 29 108 174 221 301 655 443 317 108 177 95 132 30 130 172 215 282 610 477 279 114 177 76 152 31 142 215 285 570 269 157 79 Second- Rtm-of t in Month foot-days Maximum Minimum Mean acre-feet Oct 3,805 142 82 123 7,550 Hoi 5,278 338 124 176 10,470 Dec 10,249 1,460 160 331 20,330 C alendar year 193' 44,639.0 1,460 6 122 88,550 Jan 12 450 209 292 17,930 Pet 16,5 DO 940 311 589 32,730 Mar 19,2 47 1,470 382 621 38,180 Apr 16,6 22 700 443 554 32,970 Maj 10,3 36 550 26Q 835 20,600 Jun 4,3 L4 276 97 144 8,560 Jul y...... 3,5 33 177 82 116 7,110 Aug 2,9 33 140 68 96.2 5,920 Sep 3,1 31 152 56 104 6,190 1ater year!937-3E 105, 130 1,460 56 288 208,500 Peak discharge.- Dec. 11 (4 p.m.) 1,860 see.-ft.; Dec. 12 (2:30 a.m.) 1,£ sec.-ft.j Mar 23 (5:30 p.m.) 1,940 see.-ft. 350 KLAMATK RIVER BASIN Salmon River at Somesbar, Calif. Location.- Water-stage recorder, lat. 41°23', long. 123°28', In NWi sec. 2, T. 11 N., R. 6 E., half a mile east of Somesbar post office and li- miles upstream from mouth. Altitude, about 500 feet. Drainage area.- 737 square miles. Records available.- September 1911 to September 1915, October 1927 to September 1938. Average discharge.- 12 years (1911-13, 1927-29, 1930-38), 1,482 second-feet. Extremes.- Maximum discharge during year, 27,000 second-feet Dec. 11 (gage height, 14.80 feet), from rating curve extended above 7,000 second-feet on basis of velocity- area studies; minimum, 163 second-feet Sept. 18, 22, 23 (gage height, 2.96 feet). 1927-38: Maximum discharge, that of Dec. 11, 1937; minimum, 70 second-feet Aug. 25, Sept. 4, 5, 1931. Remarks.- Records good. No large diversions above station. Discharge, in second-feet, water year October 1937 to September 1938 Day Oct. HOT. Dec. Jan. Pet). Mar. Apr. ««y June July Aug. Sept. 1 299 255 1,770 2,490 3,370 5,200 3,920 7,900 5,130 1,840 490 197 ?, 509 235 1,590 2,420 4,260 6,280 3,820 6,780 5,460 1,740 474 203 3 375 225 1,460 2,240 4,500 5,800 3,820 5,680 5,680 1,600 441 203 4 417 215 1,320 2,100 3,920 4,840 4,120 5,130 6,010 1,470 425 197 5 349 210 1,240 1,990 3,700 4,260 4,420 4,920 6,120 1,420 409 197 6 282 215 1,180 1,880 5,200 3,810 4,220 4,720 6,010 1,380 401 203 7 250 215 1,140 1,780 7,250 3,480 4,020 4,720 5,680 1,360 393 209 8 230 215 1,070 1,680 6,760 3,160 4,520 4,920 5,130 1,350 393 227 9 210 215 1,040 1,600 5,560 3,050 5,020 5,240 4,520 1,270 385 215 10 200 441 9,890 1,530 5,320 2,950 5,020 5,350 4,120 1,220 370 203 11 192 1,760 25,200 1,460 4,840 2,850 5,020 5,680 4,020 1,150 355 191 12 192 1,070 13,900 1,420 4,260 3,370 4,720 6,560 3.820 1,100 348 185 13 187 965 8,250 1,390 4,380 4,380 4,420 7,660 3,640 1,100 340 180 14 334 2,200 6,040 2,430 4,610 4,040 4,120 9,340 3,730 1,160 332 174 15 461 1,620 4,840 3,590 4,040 5,080 4,220 10,100 3,640 1,130 325 174 Ifi 342 2,170 4,040 3,050 3,480 8,500 5,900 8,620 3,460 1,090 310 174 17 356 3,700 3,480 3,590 3,050 7,250 7,2CO 7,220 3,100 1,070 297 168 18 550 2,810 2,950 4,150 2.810 6,760 8,860 6,340 2,740 996 290 163 19 396 9,880 2,620 3,920 2,580 10,200 9,100 5,570 2,650 924 290 174 20 316 17,000 2,320 3,480 2,400 9,250 8,140 5,240 2,740 864 284 180 K\ 282 7,750 2,100 3,480 2,370 7,250 7,660 5,240 2,920 810 271 174 ftp. 255 5,440 1,970 6,520 2,560 6,520 7,000 5,570 3,010 770 258 163 25 240 8,250 1,800 6,520 2,850 10,000 7,000 6,120 2,920 730 252 163 24 225 5,920 1,820 5,080 3,920 8,860 6,560 6,450 2,560 710 252 180 25 220 4,500 1,680 4,260 4,500 7,220 6,340 6,560 2,470 670 245 185 26 215 4,040 1,590 3,700 4,260 6,230 6,120 7,000 2,430 631 239 180 27 210 3,160 1,560 3,480 4,150 5,680 6,230 6,450 2,320 604 233 180 28 205 2,630 1,490 3,370 4,040 5,460 6,230 5,350 2,190 622 227 209 29 196 2,250 1,450 3,160 _ 5,130 6,340 5,130 2,170 586 221 245 SO 240 1,970 3,480 2,850 - 4,620 8,140 5,020 2,120 542 215 264 31 288 - 2,950 3,050 - 4,220 - 4,820 - 516 203 - Second- Mean Hun-off in Month foot -days UajcljnuBL Mtntnrum acre-feet 9,023 550 187 291 17,900 91,526 17,000 210 3,051 181,500 117,230 25,200 1,040 3,782 232 , 500 Calendar year 1937 ...... 698,607 25,200 128 1,914 1,386,000 93,660 6,520 1,390 3,021 185,800 114,940 7,250 2,370 4,105 228,000 172,240 9,100 3,820 5,741 341,600 Ifcy...... 191,400 10,100 4.720 6,174 379,600 112,510 6,120 3,750 223,200 9,968 490 322 19,770 5,760 264 163 192 11,420 Water year 1937-38...... 1,126,382 25,200 163 3,086 2,234,000 Peak discharge.- Nov. 20 (9 a.m.) 20,300 sec.-ft.) Dec. 11 (1:30 a.m.) 27,000 sec.-ft.; Mar. 23 (2 p.m.) and May 15 (1 a.m.) 11,300 sec.-ft. KLAMATH RIVER BASIN 361 Trinity River at Lewlston, Calif. Location.- Water-stage recorder, lat. 40°42', long. 122°48', In NEi sec. 19, T. 33 N., R. 8 W., at highway bridge at Lewlston, 0.8 mile downstream from Deadwood Creek. Zero of gage Is 1,794.72 feet above mean sea level (general adjustment of 1929). Drainage area.- 724 square miles. Records available.- August 1911 to September 1938. Average discharge.- 27 years, 1,451 second-feet. Extremes.- Maximum discharge during year, 37,000 second-feet Dec. 11 (gage height, 19.9C feet), from rating curve extended above 12,500 second-feet on basis of velocity-area studies; minimum,132 second-feet Sept. 7. 1911-38: Maximum discharge, that of Dec. 11, 1937; minimum, 23 second-feet July '30, 1924. Remarks.- Records good except those for days of missing gage heights, Oct. 1, 2, which were computed on basis of partial gage-height graph and records for station near Burnt Ranch and are fair. Diversions for irrigation, power, and placer mining above station. Discharge, In aecond-feet, water year October1937 to September 1938 Day oot. HOT. Dec. Jar» Feb. Mar. Apr. May June July Aug. Sept. 1 150 239 1,430 1,440 3,200 5,740 2,790 9,580 5,760 1,640 378 166 2 535 219 1,310 1,620 3,730 10,400 2,710 7,800 6,400 1,540 356 162 S 386 210 1,200 1,630 3,640 7,080 2,870 6,180 6,620 1,450 342 162 t 318 807 1,120 1,530 3,040 5,040 3,550 5,540 7,080 1,330 321 162 6 284 204 1,050 1,470 2,630 4,090 3,910 5,340 7,OSO 1,260 300 162 6 253 198 996 1,390 3,200 3,550 3,550 5,140 6,S40 1,210 270 162 7 228 198 962 1,350 4,840 3,200 3,290 5,340 6,400 1,200 276 154 8 213 195 930 1,290 5,640 3,040 3,640 5,740 5,760 1,160 276 154 9 198 195 978 1,230 5,240 3,040 4,370 6,620 4,980 1,120 270 154 10 188 806 14,400 1,200 5,740 2,950 4,560 6,840 4,350 1,080 264 158 11 175 2,700 32,400 1,170 4,840 2,870 4,660 7,560 4,000 1,000 258 158 12 172 1,440 15,500 1,140 3,820 3,640 4,560 8,800 3,750 970 246 154 13 175 1,000 7,560 1,130 3,730 5,440 4,180 10,900 3,580 950 240 150 14 480 1,2SO 5,240 1,290 3,380 4,560 4,000 12,600 3,660 940 240 150 16 608 1,160 4,2SO 1,950 2,710 4,940 4,090 13,700 3,580 930 240 150 16 422 2,120 3,550 2,000 2,400 9,840 4,840 12,000 3,420 890 235 147 17 354 2,800 3,040 3,120 2,130 6,840 5,960 9,320 3,020 870 230 144 18 340 1,850 2,630 3,120 1,990 5,440 9,060 7,560 2,580 840 225 141 19 300 4,250 2,320 2,790 1,830 5,440 10,100 6,400 2,440 810 225 141 SO 272 20,000 2,110 2,470 1,710 5,240 8,800 5,970 2,370 750 220 147 Si 250 7,610 1,930 2,140 1,650 4,460 8,540 5,970 2,580 702 220 144 22 228 5,030 1,790 2,470 1,740 4,000 7,800 6,400 2,720 621 210 144 23 222 10,400 1,680 2,630 1,830 4,000 7,800 7,080 2,720 603 205 141 24 216 5,400 1,630 2,320 2,290 3,730 8,040 7,800 2,440 585 195 141 85 210 3,560 1,530 2,160 2,710 3,380 6,840 7,800 2,300 558 190 141 26 207 2,880 1,440 2,020 2,790 3,290 6,620 8,540 2,230 513 182 144 S7 201 2,330 1,380 1,990 2,710 3,460 6,840 7,560 2,090 486 178 147 28 195 2,000 1,330 2,110 2,710 3,640 7,080 5,970 1,960 477 178 190 29 195 1,750 1,270 2,060 _ 3,460 6,620 5,970 1,900 468 174 25S SO 198 1,550 1,560 1,950 _ 3,120 8,540 5,970 1,900 426 170 307 SI 225 - 1,540 2,470 - 2,870 5,760 402 166 Seoond- Run-off In Month foot-days Ma-rim^ Minimum Mean aore-feet 8,398 608 150 271 16,660 83,781 20,000 195 2,793 166,200 120,086 32,400 930 3,874 238, SOO Calendar year 1937...... 704,166 32,400 95 1,929 1,397,000 58,650 3,120 1,130 1,892 116,300 87,870 5,740 1,650 3,138 174,300 March...... 141,790 10,400 2,870 4,574 S81,200 April ...... 170,210 10,100 2,710 5,674 337,600 May...... 233 Y50 13,700 5,140 7,540 463,600 116*510 7,080 1,900 3,884 23 ly 100 July...... SVjYSl 1,640 402 896 55,100 7,480 3Y8 166 241 14,840 4,829 307 141 161 9,580 Water year 1937-2 8...... 1,061,135 32,400 141 2,907 S, 105, 000 Peak discharge.- HOT. 20 (11 a.m.) 25,300 sec.-ft.} Dec- 11 (Ii30 a.m.) 37,000 sec.-ft.) May 15 (4 a.m.) 14,900 sec.-ft. 362 KLAMATH RIVER BASIN Trinity River near Burnt Ranch, Calif. Location.- Water-stage recorder, lat. 40°47', long. 123°25', in sec. 29, T. 5 N., R. 7 E., 2 miles upstream from highway bridge at Cedar Flat and 7 miles upstream from village of Burnt Ranch. Zero of gage is 1,007.98 feet above mean sea level (general adjustment of 1929). Drainage area.- 1,429 square miles (revised). Records available.- October 1931 to September 1938. Extremes.- Maximum discharge during year, 71,800 second-feet Dec. 11 (gage height, 31.4 feet, from floodmarks), from rating curve extended above 24,000 second-feet on basis of velocity-area studies; minimum, 170 second-feet Oct. 1. 1931-38: Maximum discharge, that of Dec. 11, 1937; minimun, 69 second-feet Oct. 5, 1931. Remarks.- Records excellent except those for period of missing gage heights, Dec. 11-19, and periods of doubtful gage heights, July 21 to Aug. 19, Aug. 21-23, which were com puted on basis of peak stage and partial graph for Dec. 11 and records for stations near Hoopa and at Lewiston and are good. Slight regulation above station; several small diversions for raining and irrigation. Discharge, In second-feet, water year October 1937 to Septeabsr 1938 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May ' June July Aug. Sept. 1 1S4 354 2,650 2,720 5,720 9,190 6,570 15,300 8, ISO 2,720 770 304 2 393 367 2,420 2,840 7,280 18,300 6,400 13,000 8,950 2,440 750 300 3 688 347 2,200 3,080 8,570 16,200 6,400 10,400 9,350 2,270 730 294 4 570 334 2,000 2,900 7,230 11,200 7,100 9,150 9,950 2,07O 700 287 6 490 328 1,850 2,780 6,230 8,760 8,570 8,570 10,400 1,970 670 287 6 438 325 1,760 2,660 6,570 7,460 7,640 8, ISO 10,200 1,880 640 292 7 388 316 1,660 2,540 8,950 6,740 7,100 8,190 9,550 1,880 620 297 e 357 316 1,620 2,380 13,000 6,400 7,280 8,760 8,760 1,880 610 297 9 334 313 1,530 2,270 11,200 6,230 8,000 9,57C 7,460 1,840 590 292 10 310 620 4,120 2,170 13,200 6,230 8,380 10,400 6,570 1,740 570 298 11 2S2 2,720 50,400 2,120 11,000 5,890 8,570 11,000 5,890 1,660 550 S80 12 278 3,420 33,000 2,020 8,760 6,570 8,380 12,70C 5,560 1,570 530 280 13 270 1,800 19,000 1,S70 8,570 9,350 7,640 15,800 5,240 1,530 510 274 14 506 1,950 12,000 2,120 8,760 8,760 7,100 18,800 5,400 1,530 500 269 15 970 2,150 8,500 3,210 7,280 8,760 7,100 20,900 5,240 1,490 480 265 16 874 2,360 6,800 3,470 6,230 17,400 8,380 19,100 5,240 1,450 460 263 17 6S4 6,240 5,500 5,560 5,400 16,600 10,800 15.30C 4,610 1,450 450 259 18 704 4,450 4,700 6,740 4,920 12,100 15,300 12,100 3,880 1,410 440 257 19 595 6,560 4,000 6,230 4,610 12,300 17,800 10,200 3,600 1,370 430 259 20 510 27,800 3,600 5,560 4,160 13,200 15,800 9,150 3,540 1,330 420 261 21 446 21,300 3,340 4,760 4,020 10,800 14,600 9,150 3,670 1,270 400 267 vat 409 8,830 3,080 5,720 4,160 9,550 13,000 9,350 4,020 1,200 390 263 23 381 13,200 2,900 6,400 4,610 10,800 12,500 10,200 4,160 1,140 370 263 24 360 11,700 2,780 5,560 5,560 11,800 12,700 11,600 3,670 1,100 361 261 25 350 7,480 2,660 4,920 6,570 10,400 12,100 11,400 3,540 1,060 355 263 26 341 5,SOO 2,490 4,460 6,570 9,550 11,000 12,300 3,400 1,030 343 265 27 331 4,920 2,380 4,310 6,400 S,350 11,000 12,100 3,280 990 334 276 28 319 4,000 2,320 4,310 6,230 9,550 11,600 9,150 3,140 950 329 332 29 316 3,420 2,220 4,310 8,760 11,000 8,570 3,020 900 323 389 50 322 2,960 2,720 4,020 _ 8,000 13,000 8,570 3,020 860 318 460 31 338 - 3,020 4,310 - 7,100 8,380 810 310 - Second- Maxlnzuiii Mean Run-off In Month foot-days Minimum acre-feet 194 27,310 313 4,893 291,100 199,220 50, 400 1,530 6,426 395,100 Calendar year 1937...... 1,160,663 50,400 156 3,180 2,302,000 6,400 *j...... 8,648 460 257 288 17,150 Water year 1937-3 1,896,649 50,400 194 5,196 3,762,000 Peak discharge.- Nov. 20 (10 p.m.) 35,800 see.-ft.i Dec. 11 (2 p.m.) 71,800 (6 p.m.) 23,400 sec.-ft. KLAMATH RIVER BASIN 363 Trinity River near Hoopa, Calif. Location.- Water-stage recorder, lat. 41°02', long. 123°39', in SEi sec. 31, T. 8 N., R. 5 E., on Hoopa Indian Reservation, half s. mile downstream from Campbell Creek and 2 miles southeast of Hoopa. Altitude, about 315 feet. Drainage area.- 2,840 square miles (revised). Records available.- October 1931 to September 1938. October 1911 to January 1914 and November 1S16 to August 1918 at site at Hoopa, 2 miles downstream. Extremes.- Maximum discharge during year, 105,000 second-feet Dec. 11 (gage height, 28.70 feet), from rating curve extended above 33,000 second-feet on basis of velocity- area and A/a studies; minimum, 282 second-feet Oct. 1 (gage height, 2.94 feet). 1911-14; 1916-18; 1S31-38: Maximum discharge, that of Dec. 11, 1937; minimum, 162 second-feet Oct. 4, 1931. Remarks.- Records excellent. Small diversions for mining and irrigation above station. Discharge, In second-feet, water year October 1937 to September 1938 Day oet. HOT. Dec. Jan. Pel). Mar. Apr. May June July Aug. Sept. 1 386 641 6,530 6,300 14,400 19,000 16,100 23,600 11,400 3,920 1,190 610 2 696 646 4,980 6,740 19,800 31,500 14,800 20,700 11,900 3,650 1,160 610 S 978 632 4,480 6,960 23,900 33,400 14,500 17,400 12,200 3,420 1,140 588 4 1,090 696 4,120 6,520 19,400 25,700 15,400 14,800 12,700 3,220 1,110 588 6 922 582 3,870 6,300 16,100 21,000 20,300 13, 900 13,000 3,040 1,060 566 6 790 674 3,640 6,100 21,000 17,200 18,100 13,300 13,000 2,990 1,030 566 7 695 564 3,430 5,700 29,700 15,100 16,100 13,000 12,400 2,940 972 565 e 610 560 3,290 5,600 36,600 13,800 16,100 13,600 11,400 2,880 945 588 9 660 560 3,220 5,210 31,600 12,800 17,400 14,800 10,300 2,820 945 688 10 636 766 15,100 5,030 32,900 12,600 17,800 15,400 9,300 2,720 920 588 11 612 3,760 93,400 4,850 29,700 11,900 17,400 16,800 8,300 2,600 895 565 12 497 6,080 69,300 4,580 25,200 14,700 16,700 17,800 8,050 2,500 895 565 13 482 3,720 39,600 4,490 24,800 21,800 15,400 21,100 7,550 2,440 870 546 14 632 4,380 28,800 4,670 26,500 20,200 14,200 25,200 7,300 2,390 845 525 15 1,260 5,420 21,400 6,740 21,800 21,800 14,200 28 , 300 7,300 2,340 845 522 16 1,410 5,310 16,500 7,400 17,500 39,500 16,100 27,000 7,050 2,290 820 511 17 1,200 14,900 12,800 13,100 14,400 38,100 20,700 22,300 6,560 2,240 820 504 18 1,170 10,600 10,500 18,700 12,500 31,500 26,100 18,100 5,860 2,190 795 497 19 1,060 16,900 9,120 16,500 11,300 35,700 30,600 15,400 5,310 2,140 770 490 20 922 53,100 8,120 14,100 10,200 40,000 28,300 13,600 5,200 2,000 745 490 21 816 35,900 7,180 11,900 9,640 33,400 26,100 13,300 5,200 1,920 745 490 22 740 18,500 6,740 16,100 9,900 29,200 23,500 13,300 5,420 1,780 722 497 23 695 22,200 6,300 17,900 10,700 44,000 22,300 13,900 5,640 1,700 722 497 24 646 22,200 6,100 14,400 12,800 47,100 21,800 15,100 5,200 1,620 722 500 25 618 15,200 5,900 12,200 15,800 37,600 21, 500 15, 400 4,890 1,540 700 508 26 605 11, 900 6,500 10,700 15,800 32,000 19,200 16,100 4,700 1,470 678 611 27 592 9,820 5,500 9,900 14,700 27,900 18,800 16,100 4,510 1,400 678 522 28 574 8,300 5,300 9,900 14, 400 26,100 19,900 13,600 4,420 1,400 655 565 29 560 7,060 5,120 9,640 23,900 18,800 12, 400 4,160 1,370 655 666 30 636 6,320 6,520 8,860 21,100 21,500 11,900 4,160 1,310 632 770 31 650 6,960 9,900 18,100 11,600 1,280 632 Second- Run-off In Month foot -days Vt^Tlfinna Minimum Mean acre-feet Dot 23,439 1,410 386 756 46,490 Hoi 287,680 53,100 660 9,589 570,600 Dec 428,220 93,400 3,220 13,810 849,400 0 2,143,108 93,400 272 5,872 4,251,000 Jan uary 285,890 18,700 4,490 9,222 567,100 Pel 542,940 36,600 9,640 19,390 1,077,000 Mar 817,600 47,100 11, 900 26,370 1,622,000 Apr 11...... 579,700 30,600 14, 200 19,320 1,150,000 Maj 517,700 28,300 11,600 16,700 1,027,000 Jim 234,380 13,000 4,160 7,813 464,900 Jul 71, 420 3,920 1,280 2,304 141,700 Aus 26,313 1,190 632 849 62,190 Se] 16,584 770 490 653 32,890 1ater year 1937-3 3,831,866 93,400 386 10,500 7,601,000 Peak discharge.- Nov. 20 (3 p.m.) 64,200 sac.-ft.j Dec. 11 (2 p.m.) 105,000 see.-ft.; Mar. 24 (1:30 a.m.) 56,200 sec.-ft. 364 SMITH RIVER BASIN Smith River near Crescent City, Calif. Location.- Water-stage recorder, lat. 41°47', long. 124°04', in SWi sec. 10, T. 16 N., R. 1 E., half a mile downstream from South Fork and 9 miles east of Crescent City. Drainage area.- 613 square miles. Records available.- October 1931 to September 1938. Extremes.- Maximum discharge during year, 78,900 second-feet probably Dec. 11 (gage height, 29.4 feet, from floodmarks in well), from rating curve extended above 23,500 second-feet; minimum discharge observed, 222 second-feet Sept. 23 (gage height, 3.59 feet). 1931-38: Maximum discharge, that of Dec. 11, 1937: minimum. 168 second-feet Oct. 21, 1931. Remarks.- Records good except those for periods of missing gage heights, Nov. 7 to Dec. 21, Dec. 24 to Mar. 1, for which records were not computed. No diversion or regula tion. Discharge, In second-feet, water year October 1937 to September 1938 Day Dot. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1,200 512 _ 9,000 4,910 5,050 1,840 615 328 244 e 755 478 - 9,620 4,500 4,240 1,920 615 322 244 s 650 446 . 9,400 4,500 3,630 1,880 595 317 246 4 1,370 425 - 16,700 5,510 3,290 2,000 575 314 246 B 935 419 - 15,100 6,860 3,070 2,040 558 306 248 s 590 425 . 9,620 5,670 2,960 1,920 540 301 251 7 460 - _ 7,400 5,050 2,850 1,800 522 299 283 S 410 - - 6,340 5,350 2,960 1,610 522 299 306 9 383 - - 5,510 5,350 3,070 1,440 505 299 268 10 362 - - 5,050 4,910 3,070 1,310 505 299 251 11 347 - - 4,770 4,500 3,070 1,220 488 293 244 12 335 - - 6,860 4,500 3,510 1,190 488 291 239 13 329 - - 14,600 4,240 3,990 1,160 467 291 237 14 380 - - 12,800 3,990 4,630 1,160 454 291 233 16 478 - - 33,500 3,990 4,500 1,110 448 286 233 16 460 _ . 39,600 11,400 3,990 1,060 435 278 231 17 2,220 - - 19,900 10, 500 3,290 1,010 423 278 228 18 2,140 - - 34,000 9,400 2,850 935 411 278 226 19 1,140 - - 41, 400 8,200 2,600 910 399 275 228 20 815 - - 20,200 6,680 2,550 910 387 273 228 21 690 _ _ 13,300 6,170 2,550 910 381 265 226 22 590 - 2,650 18,800 5,350 2,650 910 375 260 226 23 530 - 2,650 38,300 5,200 2,750 865 364 263 226 24 495 - - 26,900 4,910 2,850 820 356 265 235 25 460 - - 18,400 4,630 2,850 775 356 263 239 26 436 _ _ 12,800 4,370 2,850 755 358 263 237 27 419 - . 10,100 4,630 2,600 735 356 258 235 28 404 - _ 9,200 5,200 2,180 695 350 256 265 29 401 _ . 7,600 4,910 1,960 675 347 253 275 SO 495 - - 6,340 5,670 1,880 655 339 251 265 31 610 - - 5,510 1,800 - 333 246 Beoond- Run-off In Month foot-days Mqxftjmijn Minimum Mean acre-feet 21,289 2,220 329 687 42,230 _ _ _ _ _ _ _ _ _ 488,620 41,400 4,770 15,760 969,200 April...... 171,050 11,400 3,990 5,702 fay...... 96, 090 5,050 1,800 3,100 i Qn'finn 36,220 2,040 655 1,207 71 840 July...... 13,867 615 333 447 27 500 8, 761 328 246 17*380 7,343 306 226 245 14,560 Water year MISCELLANEOUS DISCHARGE MEASUREMENTS 365 Measurements of stream flow in the Pacific slope basins in California at points other than gaging stations for the year ending September 30, 1938, are listed in the following table. Streams south of San Francisco Bay Cottonwood Creek at Barrett, Calif. Date Discharge Date Discharge Date Discharge Date Discharge (sec. -ft.) (sec. -ft.) (sec. -ft.) (sec. -ft.) Mar. 21 141 Apr. 6 57 Apr. 20 2.8 Apr. 28 2.2 28 99 12 26 San Luls Rey River at crossing at Bonsall, Calif. Dec. 15 24 Feb. 16 48 June 6 15 July 26 1.6 28 29 24 34 24 12 Aug. 5 1.6 Jan. 4 23 May 24 30 July 8 7.9 San Luia Rey River at Rancho Quajomlta, Calif. Dec. 15 23 Feb. 16 50 May 24 39 June 24 9.6 28 26 24 39 June 6 14 July 8 4.5 Jan. 4 22 Temeoula Creek above Murrieta Creek near Temecula, Calif. Mar. 5 279 Apr. 1 53 Apr. 14 45 Apr. 29 24 21 78 4 48 18 28 May 3 28 24 71 7 42 21 28 6 24 28 57 11 32 25 33 10 14 30 54 Arroyo Seco at Nigger Canyon near Temecula, Calif. Feb. 11 3.4 || Mar. 18 30 || Apr. 11 7.7 || May 18 5.8 Arroyo San Onofre near San Onofre, Calif. Mar. 18 37 Apr. 12 6.8 May 7 1.1 May 24 0 22 22 19 3.0 11 .7 28 0 25 21 22 3.1 14 .6 31 0 31 10 26 3.4 17 1.4 June 4 0 Apr. 5 9.9 30 5.8 20 1.1 10 0 8 8.7 May 4 2.3 Arroyo San Mateo near San Clemente, Calif. Mar. 18 215 May 11 19 June 28 2.5 Aug. 15 1.1 22 132 14 18 30 2.4 19 1.1 25 104 17 21 July 6 2.2 S3 1.2 29 83 20 20 9 1.9 26 1.3 31 73 24 13 12 2.0 30 1.2 Apr. 5 57 28 8 16 1.9 Sept. 2 1.2 8 46 31 7.5 19 1.6 6 1.1 12 41 June 4 6.2 23 1.4 9 1.2 15 42 7 5.7 26 1.6 13 1.0 19 30 10 5.7 30 1.5 16 1.1 22 31 14 5.1 Aug. 2 1.4 20 1.1 26 32 17 3.9 6 1.1 23 1.1 30 42 21 3.0 9 1.2 27 1.1 May 4 31 24 3.0 12 1.1 30 1.1 7 23 San Juan Creek near San Juan Hot Springs, Calif. Mar. 15, 211 second-feet Santa Ana River at Orange Street Bridge at Redlands, Calif. May 27, 172 second-feet Santa Ana River near San Bernardlno, Calif. Dec. 13 | [Mar. 2 | 1,120" Santa Ana River 1,000 feet above Prado gage,near Prado, Calif. Sept. 6 | Sept.12 Santa Ana River at Yorba Bridge, near Yorba, Calif. Feb. 9 185 Feb. 28 196 Apr. 15 282 May 20 137 10 156 Mar. 1 1,960 22 389 24 56 11 290 1 2,410 29 32V 27 6 12 701 21 635 May 6 278 31 5.1 23 42 25 528 10 146 June 3 0 25 40 31 408 13 138 27 169 Apr. 7 361 17 212 366 MISCELLANEOUS DISCHARGE MEASUREMENTS Streams south of San Francisco Bay Continued Santa Ana River at Jefferson Street Bridge, near Atwood, Calif. Discharge Discharge Discharge Discharge Date tsee.-ft.) Data (sec .-ft.) Date (sec. -ft.) Date (sec. -ft.) Feb. 23 4.0 Apr. 7 210 May 10 98 May 27 0 Mar. 9 588 15 176 13 55 31 0 21 442 22 241 17 158 25 394 29 240 20 66 31 295 May 6 160 24 15 Santa Ana River at Anaheim-Ollve Bridge, near Olive, Calif. Feb. 15 *5 Apr. 7 101 May 10 17 May 24 M..O 23 .5 22 134 13 9.5 27 0 25 3.0 29 128 17 64 Mar. 21 291 May 6 48 20 9.5 *Estlmated. Santa Ana River at Chapman Avenue Bridge, near Orange, Calif. Feb. 10 20 Mar. 25 72 Apr. 29 40 May 20 *1.0 23 0 31 40 May 6 5.8 0 28 44 Apr. 7 22 10 *.5 Mar. 1 1,100 15 8.5 13 *1.0 21 152 22 38 17 16 Southern California Edison Co.'s canal near Mentone, Calif. July 8, 79 second-feet Warm Creek at Mill Street Bridge at San Bernardlno, Calif. May 27, 10 second-feet Warm Creek at; E Street Bridge at San Bernardlno, Calif. May 27, 25 second-feet Lytle Creek at mouth, at San Bernardlno, Calif. May 27, 0.9 second-feet Fillmore Land & Water Co.'s diversion from Sespe Creek near Sespe, Calif. Nov. 22 16 July 21 17 Aug. 15 17 Sept. 10 17 Dec. 21 2.0 25 20 18 18 12 16 June 23 16 28 19 22 16 15 14 July 2 16 Aug. 1 18 25 17 19 16 7 17 11 31 17 22 17 14 17 8 19 Sept. 3 16 26 16 18 19 11 19 8 17 29 17 Santa Ynez River at Solvang, Calif. Dec. 4 6 Dec. 21 7.8 Jan, 15 13 Jan. 22 8.4 11 7.7 28 7 19 8.4 26 8.2 15 11 Jan. 8 7.1 Santa Ynez River at A Street Bridge near Lompoe, Calif. Aug. 8 5.6 || Sept. 2 2.5 n II Santa Ynez River at H Street Bridge near Lompoo, Calif. Aug. 8 1 5.1 II Sept. 2 ^ II 1 II Santa Ynez River at Pine Canyon Bridge, near Lompoe, Calif. Feb. 12 26,800 1 Aug. 8 3.6 Sept. 2 1.6 || Santa Ynez River at Southern Pacific Railway pumping plant near Lompoo, Calif. Aug. 8 4.7 || Sept. 2 2.4 || || Mono Creek at junction with Santa Ynez River, near Santa Barbara, Calif. Dec. 16 3.5 Jan. 5 2.2 July 14 6 Aug. 4 1.0 23 3.3 13 1.7 21 4.0 23 .19 30 3.2 21 5.6 28 2.7 Camuesa Creek at Junction with Santa Yuez River, near Santa Barbara, Calif. July 14 0.37 July 28 0.19 Aug. 4 0.14 || Aug. 23 0.13 21 .23O Streams south of San Francisco Bay Continued Sidney Creek at junction with Santa Ynez River, near Santa Barbara, Calif. Date Discharge Discharge Discharge Discharge (aec.-ft.) Date (aec.-ft.) Date (aec.-ft.) Date (sec .-ft.) Dec. 16 0.37 Jan. 5 0.23 July 14 0.10 Aug. 4 0.07 23 .34 13 .18 21 .SI 23 .07 SO .23 21 .39 28 .19 Hot Springs at junction with Santa Ynez River, near Santa Barbara, Calif. Dec. 30 0.33 || May 19 0.48 || July 28 0.37 || Sept. 29 0.61 Santa Agueda Creek at junction with Santa Ynez River, near Santa Ynez, Calif. Feb. 11 |l,490 June 29 0,93 July 27 0,27 Sept. 30 1.1 May 18 | 1.0 Santa Cota Creek at Junction with Santa Ynez River, near Santa Ynez, Calif. Nov. 2S 0.75 Jan. 26 3.1 June 29 0.97 Aug. 31 3.3 Dec. 28 3.1 May 18 .90 July 27 1.38 Sept. 30 3.9 Alamo Pintado Creek 1.1 miles above junction with Santa Ynez River, near Solvang, Calif. Nov. 22 0.26 || Jan. 26 0.20 June 29 0.19 Sept. 30 0.34 Dec. 28 .19 || May 18 .47 July 27 23 11 Alisal Creek at Junction with Santa Ynes Biver, near Solvang, Calif. Nov. 22 0.20 Jan. 26 0.12 Kay 18 1.3 July 27 0,16 Dec. 28 ,21 Feb. 26 7.1 June 29 .33 Sept. 30 .12 He)joqui Creek at junction with Santa Ynez River, near Buellton , Calif. May 18 1.7 June 29 0.55 | July 27 0.37 || Sept .30 0.88 || Salsipuedes Creek 0.9 mile above junction with Santa Ynez River, near Lompoc, Calif. Nov. 1 0.48 Jan. 31 1.1 May 20 4.9 July 22 1.1 Dec. 17 .83 Feb. 25 16 June 20 1.6 Sept. 30 1.9 Alamo Creek at junction with Cuyama River, near Santa Karia, Calif. Oct. 20 2.6 May 6 14 June 28 4.8 Aug . 26 3.1 Nov. 23 2.5 16 9.2 July 8 5.9 Sept. 6 3.2 Mar. 22 116 24 7 19 4.8 16 2.7 Apr. 6 37 June 8 6.6 29 4,0 27 3.1 27 19 17 5.4 Aug. 16 3.6 Haeimiento River 5 miles upatream from mouth, near San Miguel, Calif. Oct. 2 0 Feb. 24 840 Kay 4 114 July 6 0.9 Dec. 1 0 Apr. 8 *300 June 8 20.0 Aug. 11 0 Jan. 5 51 *Estimated. Soquel Creek at gaging station 1,000 feet upstream from Soquel-Santa Cruz road, in Soquel, Calif Oct. 4 2.9 Feb. 2 502 Mar. 2 612 Apr. 21 48.5 14 5.0 10 1,160 15 266 July 8 10.6 Dec. 3 4.8 Laguna Creek at gaging station at highway bridge in Coast, Calif. Oct. 4 *0.1 Dec. 3 *0,3 Kar. 2 69 Apr. 21 12.4 15 .2 Feb. 10 49.9 15 35.9 July 26 *.4 Nov. 3 *.l 21 36.5 Scott Creek at gaging station 1,000 feet downstream from mouth of Little Creek and f mile south of Swanton, Calif. KINGS RIVER BASIN North Fork of Kings River at gaging station 1 mile downstream from Raneheria Creek, Calif. June 5 4,420 .Tune 6 4,500 June 14 2,560 July 16 921 5 4,700 6 4,390 July 5 1,420 Dinkey Creek at fomer gaging station J- mile upstream from mouth and 2 miles southeast of Sycamore Springs, Calif. 368 MISCELLANEOUS DISCHARGE MEASUREMENTS Streams south of San Francisco Bay Continued SAN JOAQUIN RIVER BASIN San Joaquin River at former gaging station f mile downstream from Kerckhoff power house and 4 miles north of Auberry, Calif. Discharge Discharge Discharge Discharge Date (see. -ft.) Date (see. -ft.) Date (sec. -ft.) Date (sec. -ft.) Jan. 22 1,550 Kay IS 11,300 June 3 17,600 July 6 8,540 Feb. 6 1,980 20 9,660 6 15,400 Rabbit Creek at former gaging station 600 feet upstream from mouth and 3 miles northwest of Camanche, Calif. Dec. 12 28.7 Feb. 3 61 Feb. 16 S.5 Mar. 12 110 Jan. 17 12.9 11 436 Kar. 8 6.9 15 31 70 ______SACRAMENTO RIVER BASIN Grindstone Creek at gaging station 0.4 mile upstream from mouth and 5 miles north of Elk Creek, Calif. Oct. 7 *0.05 Dec. 8 38.0 HOT. 16 555 Feb. 4 521 *Estimated. Butt Creek at gaging station li_r miles upstream from outlet of tunnel No. 1 from Lake Almanor to Butt Creek and 2i miles southwest of Prattville, Calif. 16.9 Kay 18 July 12 Sept. 11 376 June 22 29 Butt Creek at gaging station 400 feet downstream from outlet of tunnel No. 1 from Lake Almanor to Butt Creek and 2^ miles southwest of Prattville, Calif. Oet. 5 966 Kay 18 505 July 11 8S8 July 29 i,o:.o 5 929 June 22 1,040 12 1,040 Sept. 11 May 3 442 9fl8 Butt Creek at gaging station 300 feet upstream from mouth of creek Kay 19 27.5 North Fork of 'Xuba River at gaging station 3t miles downstream from Goodyears about 4 miles southwest of Goodyears Bar, Calif. North Pork of American River at gaging station 800 feet downstream from Rattles _____and 6 miles south of Auburn, Calif. 379 NOT. 4 419 Dec. 13 7,740 Jan. 22 528 KLAMATH RIVER BASIN Bluff Creek half a mile upstream from mouth, in sec. 30, T. 10 N., H. 5 E. 54 Aug. 23 54 INDEX Page Page "A" canal at Klamath Falls, Oreg...... 352 Bonsall, Calif., San Luis Rey River Accuracy of data and computed results.. 3 near...... 24 Acre-foot, definition of...... 1 Borel canal at Tilley Creek, Calif..... 168 Agencies other than Geological Survey, Boulder Creek at Cuyamaca Reservoir, records collected by...... 9 near Julian, Calif...... 19 Alameda Creek near Hiles, Calif...... 163 Bowman Lake, Calif., Canyon Creek below 306 Alamitos Creek near Edenvale, Calif.... 156 Bowman Lake near Graniteville, Caltf... 305 Alamo Creek, Calif., discharge measure Bdwman-Spaulding canal at intake, Calif. 307 ments of...... 367 Brea Creek at Fullerton, Calif...... 95 Alamo Pintado Creek, Calif., discharge Buchanan dam site, Calif., Chowchilla measurements of...... 367 River at...... 203 Alder Creek near Whitehall, Calif...... 325 Buck Meadows, Calif., Middle Tuolumne Alisal Creek, Calif., discharge River near...... 224 measurements of...... 367 Bucks Creek storage reservoir near Aliso Creek at El Toro, Calif...... 34 Bucks ranch, Calif...... 287 American River at Fair Oaks, Calif..... 312 Burnt Ranch, Calif., Trinity River near 362 at Sacramento, Calif...... 313 Butt Creek, Calif., discharge measure Middle Fork of, near Auburn, Calif... 314 ments of...... 368 North Fork of, at Rattlesnake Bridge, Butte City, Calif., Sacramento River at 260 Calif...... 312 Butte Creek near Chico, Calif...... * 280 discharge measurements of...... 368 near Colfax, Calif...... 311 Cache Creek at Yolo, Calif...... 333 Silver Fork of South Fork of, near North Fork of, near Lower Lake, Calif. 334 Ryburz, Calif...... 322 Cache Creek Basin, Calif., gaging- South Pork of, at Coloma, Calif...... 317 station records in...... 332-334 near Camino, Calif...... 316 Cajon Creek near Keenbrook, Calif...... 64 near Kyburz, Calif...... 315 Calabasas, Calif., Malibu Creek near..127-128 American River Basin, Calif., gaging- Calaveras River at Jenny Lind, Calif... 236 station records in...... 311-331 Calaveras River Basin, Calif., gaging- American River flume near Camino, Calif, 331 station records in...... 236-237 Antler, Calif., Sacramento River at^ . . . 256 Camino, Calif., American River flume Arlington, Calif., Santa Ana River near 37 near...... 331 Arrowhead Springs, Calif., Strawberry- South Fork of'American River near.... 316 Creek near...... 53 Camp Bonita, Calif., San Gabriel River Waterman Canyon Creek near...... 54 near...... 80 Arroyo San Mateo, Calif., discharge Camp Rincon, Calif., West Fork of San measurements of...... 365 Gabriel River at...... 86 Arroyo San Onofre, Calif., discharge Campbell Creek at Saratoga, Calif...... 160 measurements of...... 365 Campo Creek near Campo, Calif...... 15 Arroyo Seco (Los Angeles River Basin) Camuesa Creek, discharge measurements near Pasadena, Calif...... 113 of...... 366 Arroyo Seco (Salinas River Basin) near Canby, Calif., Pit River near...... 265 Soledad, Calif...... 147 Canyon Creek below Bowman Lake, Calif.. 306 Arroyo Seco (Santa Margarita River Carbon Creek at Olinda, Calif...... 96 Basin), Calif., discharge Cascade canal near Fish Lake, Oreg..... 351 measurements of...... 365 Cherry Creek near Hetch Hetchy, Calif.. 220 Ashland, Oreg., Hyatt Prairie Reservoir Chico, Calif., Butte Creek near...... 280 near...... 357 Chico Creek near...... 278 Keene Creek canal near...... 358 Chico Creek near Chico, Calif...... 278 Auburn, Calif., Middle Fork of American Chiloquin, Oreg., Sprague River near... 349 River near...... 314 Williamson River near...... 343 Avery, Calif., Middle Fork of Stanis Chino Creek near Prado, Calif...... 73 laus River near...... 228 Chowchilla River at Buchanan dam site, North Fork of Stanislaus River near.. 231 Calif...... 203 Azusa, Calif., Rogers Creek near...... 87 City Creek near Highland, Calif...... 55-56 San Gabriel River near...... 81 City Creek Water Co.'s canal near High land, Calif...... 57 Baird, Calif., McCloud River at...... 273 Claremont, Calif., San Antonio Creek Bakersfield, Calif., Kern River near... 166 near...... 74-75 Ballona Creek near Culver City, Calif.123-124 Southern California Edison Co.'s Bear Creek (San Joaquin River Basin) canal near...... 76 near Vermilion Valley, Calif..... 191 Clear Lake at Lakeport, Calif...... 332 Bear River (Feather River Basin) near Clements, Calif., Mokelumne River near. 242 Wheatland, Calif...... 309 Cliff Camp, Calif., North Fork of Kings Bear River (Mokelumne River Basin) at River near...... 178 Pardoe Camp, Calif...... 246 Clio, Calif., Middle Fork of Feather Bear River canal (Feather River Basin) River near...... 29S near Colfax, Calif...... 310 Clipper Mills, Calif., Forbestown ditch Bidwell Bar, Calif., Middle Fork of near...... 296 Feather River at...... 293 Lost Creek near...... 295 Big Bar, Calif., North Pork of Feather Coallnga, Calif., Los Gatos Creek near. 181 River at...... 283 Colby ranch, Calif., Fox Creek near.... 109 Big Bend, Calif., Pit River at...... 268 Tujunga Creek near...... 105-106 Big Creek, Calif., Florence Lake near.. 187 Cold Creek near Mokelumne Peak, Calif.. 245 Huntington Lake near...... 193 Colfax, Calif., Bear River canal near.. 310 Shaver Lake near...... 197 j North Fork of American River near.... 311 Big Creek below Huntington Lake, Calif. 194 Coloma, Calif., South Fork of American Big Trees, Calif., San Lorenzo River at 149 River at...... 317 Bluff Creek, Calif., discharge measure Colton, Calif., Lytle Creek (west ments of...... 368 channel) at...... 63 369 370 INDEX Page Page Colton, Calif., Meeks & Daley canal Elsinore Lake at Elsinore, Calif...... 71 Enterprise, Calif., Palermo canal at... 297 Warm Creek near...... 51-52 South Fork of Feather River at...... 294 Colusa, Calif., Sacramento River at.... 261 Etiwanda, Calif., Day Creek near...... 67 Computations, results of, aoouraoy of., 3 Exchequer, Calif., Lake McClure at....207-209 Concow Creek near Yankee Hill, Calif... 290 Merced River at...... 210 Conn Creek near St. Helena, Calif...... 337 Control, definition of...... 1 Pair Oaks, Calif., American River at... 312 Cooperation, record of...... 9-10 Fall Brook, Calif., Santa Margarita Copco, Calif., Fall Creek at...... 356 River near...... 28 Klamath River near...... 347 Pall Creek (Klamath River Basin) at Corona, Calif., Santa Ana River near...38, 39 Copco, Calif...... 356 Temescal Creek near...... 72 Pall River Mills, Calif., Pit River at. 266 Cosgrove Creek near Valley Springs, Falls Creek (Tuolumne River Basin) near Calif...... 237 Hetch Hetchy, Calif...... 219 Cosumnes River at Michigan Bar, Calif.. 252 Feather River at Nicolaus, Calif...... 284 North Pork of, near El Dorado, Calif. 251 Middle Pork of, at BIdwell Bar, Calif. 293 Cottonwood Creek (Goose Lake Basin) near Clio, Calif...... 292 near Lakeview, Oreg...... 255 near Oroville, Calif...... 283 Cottonwood Creek (TIa Juana River North Pork of, at Big Bar, Calif..... 283 Basin) above Tecate Creek, near near Prattville, Calif...... 281-282 Dulzura, Calif...... 12 South Pork of, at Enterprise, Calif.. 294 at Morena Dam, Calif...... 11 West Branch of, near Yankee Hill, discharge measurements of...... 365 Calif...... 289 near Dulzura, Calif...... 11 Feather River Basin, Calif., gaging- Coyote Creek Basin, Calif., gaging- station records in...... 281-310 station records in...... 161-162 Pillmore, Calif., Sespe Creek near..... 132 Coyote Creek (directly tributary to San Fillmore Land & Water Co.'s diversion Francisco Bay) near Edenvale, from Sespe Creek, Calif., dis Calif...... 162 charge measurements of...... 366 near Hadrone, Calif...... 161 Pine Gold Creek near Priant, Calif..... 201 Coyote Creek (Ventura River Basin) near FInnon Reservoir outlet near Plaeer- Venture, Calif...... 136 ville, Calif...... 330 Crescent City, Calif., Smith River near 364 Pish Creek near Duarte, Calif...... 88 Crescent Hills, Calif., Indian Creek Fish Lake, Oreg., Cascade canal near... 351 near...... 285 Florence Lake, Calif., South Pork of Craftonville, Calif., Hill Creek near.. 45-46 San Joaquin River near...... 188 Hill Creek power canal 1 near...... 48 Florence Lake near Big Creek, Calif..:. 187 Mill Creek power canals 2 and 3 near. 47 Pontana, Calif., Pontana pipe line near 61 Cucamonga Creek near Upland, Calif..... 68 Lytle Creek near...... 59-60 Culver City, Calif., Ballona Creek Fontana pipe line near Pontana, Calif.. 61 near...... 123-124 Porbestown ditch near Clipper Mills, Cupertino, Calif., Stevens Creek near.. 155 Calif...... 296 Guyana River near Santa Haria, Calif... 142 Foster, Calif., San Vicente Creek at... 20 Pourmlle Lake Reservoir near Odessa, Dalton Creek near Glendora, Calif...... 92 Oreg...... 350 Day Creek near Etiwanda, Calif...... 67 Pox Creek near Colby ranch, Calif...... 109 Data, accuracy of...... 3 Fresno River near Knowles, Calif...... 202 explanation of...... 1-3 Priant, Calif., Pine Gold Creek near... 201 Deer Creek (directly tributary to San Joaquin River near...... 184 Sacramento River) near Vine, Pullerton, Calif., Brea Creek at...... 95 Calif...... 277 Deer Creek (Feather River Basin) near GIdney Creek, Calif., discharge Smartville, Calif...... 308 measurements of...... 367 Devil Canyon Creek near San Bernardino, Glendora, Calif., Dalton Creek near.... 92 Calif...... 58 Goodyears Bar, Calif., North Pork of Dinkey Creek at mouth, Calif...... 180 Yuba River below...... 304 discharge measurements of...... 367 Goose Lake Basin, Oreg., gaging-station Don Pedro Reservoir near La Grange, records In...... 253-255 Calif...... 217 Graniteville, Calif., Bowman Lake near. 305 Downey, Calif., Los Angeles River near.99-100 Greenspot pipe line. See Southern Rio Hondo near...... 119-120 California Edison Co.'s canal Drew Creek near Lakeview, Oreg...... 253-254 and Greenspot pipe line. Duarte, Calif., Fish Creek near...... 88 Grindstone Creek, Calif., discharge Dulzura, Calif., Cottonwood Creek near.11, 12 measurements of...... 368 Tia Juana River near...... 13 Grizzly Creek near Storrie, Calif...... 288 Guadalupe Creek at Guadalupe, Calif.... 156 Eaton Creek near Pasadena, Calif...... 116 at San Jose, Calif...... 157 East Highlands, Calif., Plunge Creek Guadalupe Creek Basin, Calif., gaging- near...... 49 station records in...... 156-160 Echo Lake flume near Vade, Calif...... 318 Guenoc, Calif., Putah Creek near...... 335 Edenvale, Calif., Alamitos Creek near.. 156 Coyote Creek near...... 162 Haines Creek near Tujunga, Calif...... 112 Eel River at Hullville, Calif...... 339 Hat Creek, Calif., Hat Creek near...... 271 at Scotia, Calif...... 341 Hat Creek near Hat Creek, "Calif...... 271 at Van Arsdale Dam, near Potter Henleyville, Calif., Elder Creek near.. 275 Valley, Calif...... 340 Hetch Hetchy, Calif., Cherry Creek near 220 Eel River Basin, Calif., gaging-station Eleanor Creek near...... 222 records in...... 338-342 Palls Creek near...... 219 El Capitan Dam, Calif., San Diego River Hetch Hetchy Reservoir at...... 215 at...... 17 Lake Eleanor near...... 221 El Dorado, Calif., North Fork of Tuolumne River near...... 216 Cosumnes River near...... 251 Hetch Hetchy Reservoir at Hetch Hetchy, El Dorado canal near Kyburz, Calif..... 324 Calif...... 215 El Toro, Calif., Aliso Creek at...... 34 Highland, Calif., City Creek near...... 55-56 Elder Creek near Henleyville, Calif.... 275 City Creek Water Co.'s canal near.... 57 Eleanor Creek near Hetoh Hetchy, Calif. 222 Hoopa, Calif., Trinity River near...... 363 Elsinore, Calif., Elsinore Lake at..... 71 Hot Springs, Calif., discharge measure San Jacintc River near...... 70 ments of...... 367 INDEX 371 Page Page Huasna River near Santa Maria, Calif... 143 Lake Hodges, Calif., San Dieguito River Hullville, Calif., Eel River at...... 339 at...... 22 Hullville, Calif., Lake Pillsbury at... 338 Lake McClure at Exchequer, Calif...... 207-209 Huntington Lake, Calif., Big Creek Lake Pillsbury at Hullville, Calif..... 338 below...... 194 Lakeport, Calif., Clear Lake at...... 332 Huntington Lake near Big Creek, Calif.. 193 Lakeview, Oreg., Cottonwood Creek near. 255 Huntington-Shaver conduit at outlet, Drew Creek near...... 253-254 Calif...... 198-200 Lancha Plana, Calif., Mokelumne River Hyatt Prairie Reservoir near Ashland, at...... 241 Oreg...... 357 Lewiston, Calif., Trinity River at..... 361 Likely, Calif., South Pork of Pit River Ice House, Calif., South Pork of Silver near...... 270 Creek near...... 329 Link River at Klamath Palls, Oreg...... 345 Indian Creek near Crescent Mills, Califi 285 Little Santa Anita Creek near Sierra Irvine ranch drainage canal near Madre, Calif...... 115 Tustin, Calif...... 79 Little Tujunga Creek near San Fernando, Isabella, Calif., South Pork of Kern Calif...... 110-111 River at...... 170 Livingston, Calif., Merced River near.. 211 Lompoc, Calif., Santa Ynez River near.. 141 Jacksonville, Calif., Woods Creek near. 225 Lone Pine Creek near Keenbrook, Calif.. 65 Jenny Llnd, Calif., Calaveras River at. 236 Long Barn, Calif., South Pork of Julian, Calif., Boulder Creek near..... 19 Stanislaus River near...... 23S Tuolumne canal near...... 233 Kaweah, Calif., North Fork of Kaweah Long Beach, Calif., Los Angeles River River at...... 175 at...... 101-102 Kaweah River near Three Rivers, Calif.. 174 Los Alamitos, Calif., San Gabriel River North Pork of, at Kaweah, Calif...... 175 near...... 84-85 Keddie, Calif., Spanish Creek at...... 286 Los Angeles, Calif., Los Angeles River Keenbrook, Calif., Cajon Creek near.... 64 at...... 97-98 Lone Pine Creek near...... 65 Los Angeles River at Long Beach, Keene Creek canal near Ashland, Oreg... 358 Calif...... 101-102 Kennett, Calif., Sacramento River at... 257 at Los Angeles, Calif...... 97-98 Keno canal at Klamath Palls, Oreg...... 353 near Downey, Calif...... 99-100 Keno, Oreg., Klamth River at...... 346 Los Angeles River Basin, Calif., Kerckhoff power house, Calif., San gaging-station records in...... 97-122 Joaquin River below...... 183 Los Gatos Creek (Guadalupe Creek Basin) Kern River Basin, Calif., gaging- at Los Gatos, Calif...... 159 station records in...... 164-170 Los Gatos Creek (Tulare Lake Basin) Kern River near Bakersfield, Calif..... 166 near Coalinga, Calif...... 181 near Kernville, Calif...... 164-165 Los Molinos, Calif., Mill Creek near... 274 South Pork of, at Isabella, Calif.... 170 Los Trancos canal near Stanford Uni near Onyx, Calif...... 169 versity, Calif...... 153 Kern River No. 3 canal near Kernville, Los Trancos Creek at Stanford Univer Calif...... 167 sity, Calif...... 152 Kernville, Calif., Kern River near....164-165 Lost Creek near Clipper Mills, Calif... 295 Kern River No. 3 canal near...... 167 Lost River diversion canal near Olene, Kings River above North Pork, Calif.... 176 Oreg...... 354 at Piedra, Calif...... 177 Lower Lake, Calif., North Pork of Cache North Pork of, below Rancheria Creek, Creek near...... 334 Calif...... 179 Lytle Creek, Calif., discharge measure discharge measurements of...... 367 ment of...... 366 near Cliff Camp, Calif...... 178 east channel of, at San Bernardino, Kirkwood, Calif., seepage from Silver Calif...... 62 Lake near...... 321 near Pontana, Calif...... 59-60 Silver Lake outlet near...... 320 west channel of, at Colton, Calif.... 63 Twin Lakes outlet near...... 323 Kittridge, Calif., Merced River at..... 206 Madrone, Calif., Coyote Creek near..... 161 Klamath Falls, Oreg., "A" canal at..... 352 Malibu Creek at Crater Camp, near Keno canal at...... 353 Calabasas, Calif...... 127-128 Link River at...... 34S Matilija Creek at Matilija, Calif...... 134 Upper Klamath Lake near...... 344 McCloud River at Baird, Calif...... 273 Klamath River at Keno, Oreg...... 346 near McCloud, Calif...... 272 at Somesbar, Calif...... 348 Medley Lakes outlet near Vade, Calif... 319 below Fall Creek, near Copco, Calif.. 347 Meeks & Daley canal near Colton, Calif. 66 diversion from, near Olene, Oreg..... 355 Melones Dam, Calif., Melones Reservoir Klamath River Baain, Calif.-Oreg., at...... 229 gaging-station records in...... 343-363 Melones power house, Calif., Stanislaus Knights Perry, Calif., Oakdale canal River below...... 230 near...... 235 Melones Reservoir at Melones Dam, Califi 229 South San Joaquin canal near...... 234 Mentone, Calif., Santa Ana River near.. 35-36 Knights Landing, Calif., Sacramento Southern California Edison Co.'s River at...... 263 canal and Greenspot pipe line Knowles, Calif., Presno River near..... 202 near...... 43-44 Kyburz, Calif., El Dorado canal near... 324 Merced River at Exchequer, Calif...... 210 Silver Pork of South Pork of American at Happy Isles Bridge, near Yosemite, River near...... 322 Calif...... 204 Kyburz, Calif., South Fork of American at Kittridge, Calif...... 206 River near...... 315 at Pohono Bridge, near Yosemite, Calif...... 205 La Grange, Calif., Don Pedro Reservoir near Livingston, Calif...... 211 near...... 217 Merced River Baain, Calif., gaging- Modesto canal near...... 226 station records in...... 204-213 Tuolumne River near...... 218 Mesa Qrande, Calif., San Luis Rey River Turlock canal near...... 227 near...... 22 Laguna Creek, Calif., discharge Santa Ysabel Creek near...... SI measurements of...... 367 Michigan Bar, Calif., Cosumnes River at 252 Lagunita canal at Stanford University, Middle Tuolumne River near Buck Calif...... 154 Meadows, Calif...... 224 Lake Almanor near Prattville, Calif.... 281 Mill Creek (Sacramento River Basin) Lake Eleanor near Hetch Hetchy, Calif.. 821 near Los Molinos, Calif...... 274 372 INDEX Page Page Mill Creek (Santa Ana River Basin) near Pit No. 4 Dam, Calif., Pit River below. 267 Craftonville, Calif...... 45-46 Pit River at Big Bend, Calif...... 268 power canal 1 diverting from, near at Pall River Mills, Calif...... 266 Craftonville, Calif...... 48 below Pit No. 4 Dam, Calif...... 267 power canals 2 and 3 diverting from, near Canby, Calif...... 265 near Craftonville, Calif...... 47 near Ydalpom, Calif...... 269 Milton, Calif., Middle Pork of Yuba South Fork of, near Likely, Calif.... 270 River at...... 298 Pit River Basin, Calif., gaging-station Milton-Bowman tunnel at-outlet, Calif.. 301 records in...... 265-273 Modesto canal near La Grange, Calif.... 226 Pitman Creek below Tamarack Creek, Mokelumne Hill, Calif., Mokelumne River Calif...... 195-196 near...... 240 Placervllle, Calif., Silver Creek near. 328 Mokelumne Peak, Calif., Cold Creek near 245 Finnon Reservoir outlet near...... 330 Mokelumne River at Lancha Plana, Calif.. 241 Pleyto, Calif., San Antonio River at... 146 at Woodbridge, Calif...... 243 Plum Creek near Riverton, Calif...... 326 Middle Pork of, at West Point, Calif. 247 Plunge Creek near East Highlands, near Clements, Calif...... 242 Calif...... 49 near Mokelumne Hill, Calif...... 240 Porterville, Calif., Tule River near... 172 North Pork of, below Salt Springs Potter Valley, Calif., Eel River near.. 340 Dam, Calif...... 239 Potter Valley power-house tailrace South Fork of, near West Point, Calif. 248 near...... 342 Mokelumne River Basin, Calif., gaging- Prado, Calif., Chino Creek near...... 73 station records in...... 238-252 Santa Ana River near...... 40, 41 Mono Creek (San Joaquin River Basin) Prattville, Calif., Lake Almanor near.. 281 near Vermilion Valley, Calif..... 192 North Fork of Feather River near....281-282 Mono Creek (Santa Ynez River Basin), Publications on stream flow by Calif., discharge measurements of 366 Geological Survey...... 3-7 Monrovia, Calif., Monrovia pipe line by State agencies...... 7-8 near...... 90 information concerning...... 3-9 Sawpit Creek near...... 89 Putah Creek Basin, Calif., gaging- Montebello, Calif., Rio Hondo near....117-118 station records in...... 335-336 Montebello, Calif., Rio Hondo Slough Putah Creek near Guenoc, Calif...... 335 near...... 121-122 near Winters, Calif...... 336 Montecito, Calif., Santa Ynez River near...... 137 Rabbit Creek, Calif., discharge Morena Dam, Calif., Cottoriwood Creek at 11 measurements of...... 368 Morgan Hill, Calif., Uvas Creek near... 148 Rancherla Creek, Calif., North Pork of Murrieta Creek at Temecula, Calif...... 30 Kings River below...... 179 Rattlesnake Bridge, Calif., North Fork Naclmlento River, Calif., discharge of American River at...... 312 measurements of...... 367 Red Bluff, Calif., Sacramento River Napa River Basin, Calif., gaglng- near...... 258-259 station record in...... 337 Redlands, Calif., San Tlmoteo Creek Nestor^ Calif., Tia Juana River near... 14 near...... 50 Newman, Calif., Orestlmba Creek near... 214 Rio Hondo near Downey, Calif...... 119-120 San Joaquin River near...... 185 near Montebello, Calif...... 117-118 Nicolaus, Calif., Feather River at..... 284 Rio Hondo Slough near Montebello, Niles, Calif., Alameda Creek near...... 163 Calif...... 121-122 Nojoqui Creek, Calif., discharge Riverton, Calif., Plum Creek near...... 326 measurements of...... 367 Rogers Creek near Azusa, Calif...... 87 North Ban Juan, Calif., Middle Pork of Run-off in inches, definition of...... 1 Yuba River near...... 299 Oregon Creek near...... 302 Sacramento, Calif., American River at.. 313 Sacramento River at Antler, Calif...... 256 Oakdale canal near Knights Ferry, Calif. 235 at Butte City, Calif...... 260 Oakland Recreation Camp, Calif., South at Colusa, Calif...... 261 Pork of Tuolumne River near...... 223 at Kennett, Calif...... 257 Oceanslde, Calif., San Luls Rey River at Knights Landing, Calif...... 263 at...... 25 at Verona, Calif...... 264 Odessa, Oreg., Fourmile Lake Reservoir below Wilkins Sough, Calif...... 262 near...... 350 near Red Bluff, Calif...... 258-259 Olene, Oreg., diversion from Klamath Sacramento River Basin, Calif., gaging- River near...... 355 station records in...... 256-336 Lost River diversion canal near...... 354 Sacramento River main stem, Calif., Ollnda, Calif., Carbon Creek at...... 96 gaging-station records on...... 256-264 O'Nelll ditch near Ysidora, Calif...... 31 St. Helena, Calif., Conn Creek near.... 337 Onyx, Calif., South Fork of Kern River Sallnas River Basin, Calif., gaging- near...... 169 station records in...... 144-147 Oregon Creek near North San Juan, Sallnas River near Spreckels, Calif.... 145 Calif...... 302 near Santa Margarlta, Calif...... 144 Orestlmba Creek near Newman, Calif..... 214 Salmon River at Somesbar, Calif...... 360 Orovllle, Calif., Feather River near... 283 Salsipuedes Creek, Calif., discharge Otay River at Savage Dam, Calif...... 16 measurements of...... 367 Salt Springs Dam, Calif., North Pork of Pacolma Creek near San Fernando, Mokelumne River below...... 239 Calif...... 103-104 Tiger Creek power-house conduit below 244 Pajaro River Basin, gaging-station Salt Springs Reservoir near West Point, record in...... 148 Calif...... 238 Pala, Calif., San Luis Rey River near.. 23 San Antonio River (Sallnas River Basin) Palermo canal at Enterprise, Calif..... 297 at Pleyto, Calif...... 146 Palo Alto, Calif., San Franclsqulto San Antonio Creek (Santa Ana River Creek at...... 151 Basin) near Claremont, Calif..... 74-75 Pardoe Camp, Calif., Bear River at..... 246 San Bernardlno, Calif., Devil Canyon Pasadena, Calif., Arroyo Seco near..... 113 Creek near...... 58 Eaton Creek near...... 116 Lytle Creek (east channel) at...... 62 Paskenta, Calif., Thomas Creek at...... 276 San Diego River at El Cap!tan Dam, Pico, Calif., San Gabriel River at..... 82-83 Calif...... 17 Pledra, Calif., Kings River at...... 177 near Santee, Calif...... 18 Plru Creek near Piru, Calif...... 131 San Diego River Basin, Calif., gaging- station records in...... 17-20 INDEX 373 Page Page San Dieguito River at Lake Hodges, Santa Margarita River at Ysidora, Calif...... 22 Calif...... 29 San Dieguito River Basin, Calif., near Fall Brook, Calif...... 28 gaging-station records in...... 21-22 Santa Margarita River Basin, Calif., San Dimas Creek near San Dimas, Calif. . 91 gaging-station records in...... 26-31 San Fernando, Calif., Little Tujunga Santa Paula Creek near Santa Paula, Creek near...... 110-111 Calif...... 133 Pacoima Creek near...... 103-104 Santa Ynez, Calif., Santa Ynez River San Francisquito Creek at Palo Alto, near...... 139 Calif...... 151 Santa Ynez River at Juncal Reservoir at Stanford University, Calif...... 150 near Montecito, Calif...... 137 San Francisquito Creek Basin, Calif., at Solvang, Calif...... 140 gaging-station records in...... 150-154 below Gibraltar Dam, near- Santa San Gabriel River at Pico, Calif...... 82-83 Barbara, Calif...... 138 at Spring Street, near Los Alamitos, discharge measurements of...... 366 Calif...... 84-85 near Lompoc, Calif...... 141 near Azusa, Calif...... 81 near Santa Barbara, Calif...... 137 near Camp Bonita, Calif...... 80 near Santa Ynez, Calif...... 139 West Pork of, at Camp Rincon, Calif.. 86 Santa Ynez River Basin, Calif., gaging- San Gabriel River Basin, Calif., station records in...... 137-141 gaging-station records in...... 80-96 Santa Ysabel Creek near Mesa Grande, San Jacinto River near Elsinore, Calif. 70 Calif...... 21 near San Jacinto, Calif...... 69 Santee, Calif., San Diego River near... 18 San Joaquin River above Big Creek, Santiago Creek at Santa Ana, Calif..... 78 Calif...... 182 near Villa Park, Calif...... 77 below Kerckhoff power house, Calif. . . 183 Saratoga, Calif., Campbell Creek at.... 160 discharge measurements of...... 368 Saugus, Calif., Santa Clara River near Priant, Calif...... 184 near...... 129-130 near Newman, Calif...... 185 Savage Dam, Calif., Otay River at...... 16 near Vernalis, Calif...... 186 Sawpit Creek near Monrovia, Calif...... 89 South Fork of, near Florence Lake, Scotia, Calif., Eel River at...... 341 Calif...... 188 Scott Creek, Calif., discharge measure San Joaquin River Basin, Calif., ments of...... 367 gaging-station records in...... 182-252 Second-feet per square mile, definition San Jose, Calif., Guadalupe Creek at... 157 of...... 1 San Jose Creek near Whittier, Calif.... 93-94 Second-foot, definition of...... 1 San Juan Capistrano, Calif., San Juan Second-foot-day, definition of...... 1 Creek near...... 32 Sespe Creek, Fillmore Land & Water Trabuco Creek near...... 33 Co.'s diversion from, discharge San J\ian Creek, Calif., discharge measurements of...... 366 measurement of...... 36 5 near Pillmore, Calif...... 132 near San Juan Capistrano, Calif...... 32 Shaver Lake near Big Creek, Calif...... 197 San Juan Creek Basin, Calif., gaging- Shasta River near Yreka, Calif...... 359 station records in...... 32-33 Sierra City, Calif., North Pork of Yuba San Lorenzo River at Big Trees, Calif.. 149 River near...... 303 San Luis Rey River at Lake Henshaw, Sierra Madre, Calif., Little Santa near Mesa Grande, Calif...... 22 Anita Creek near...... 115 at Monserate Narrows, near Pala, Santa Anita Creek near...... 114 Calif...... 23 Silver Creek at Union Valley, Calif.... 327 at Oceanside, Calif...... 25 near Placerville, Calif...... 328 discharge measurements of...... 365 South Pork of, near Ice House, Calif. 329 near Bonsall, Calif...... 24 Silver Lake, seepage from, near Kirk- San Luis Rey River Basin, Calif., wood, Calif...... 321 gaging-station records in...... 22-25 Silver Lake outlet near Kirkwood, Calif. 320 San Timoteo Creek near Redlands, Calif. 50 Smartville, Calif., Deer Creek near.... 308 San Vicente Creek at Poster, Calif..... 20 Yuba River at...... 300 Santa Agueda Creek, Calif., discharge Smith River near Crescent City, Calif.. 364 measurements of...... 367 Soledad, Calif., Arroyo Seco near...... 147 Santa Ana, Calif., Santa Ana Rivsr at.. 42 Solvang, Calif., Santa Ynez River at... 140 Santiago Creek at...... 78 Somesbar, Calif., Klamath River at..... 340 Santa Ana River at Atchison, Topeka & Sal-aon River at...... 360 Santa Pe Railway Bridge, near Soquel Creek, Calif., discharge Prado, Calif...... 40 measurements of...... 367 at Auburndale Bridge, near Corona, South San Joaquin canal near Knights Calif...... 39 Ferry, Calif...... 234 at Hamner Avenue, near Corona, Calif. 38 Southern California Edison Co.'s canal, at Riverside Narrows, near Arlington, Calif., discharge measurement of. 366 Calif...... 37 near Claremont, Calif...... 76 at Santa Ana, Calif...... 42 Southern California Edison Co.'s canal discharge measurements of...... 365-366 and Greonspot pipe line near near Mentone, Calif...... 35-36 Mentone, Calif...... 43-44 near Prado, Calif...... 41 Spanish Creek at Keddie, Calif...... 286 Santa Ana River Basin, Calif., gaging- Sprague River near Chiloquin, Oreg..... 349 station records in...... 35-79 Spreckels, Calif., Salinas River near.. 145 Santa Anita Creek near Sierra Madre, Spring Valley ditch near Yankee Hill, Calif...... 114 Calif...... 291 Santa Barbara, Calif., Santa Ynez River Stage-discharge relation, definition of 1 near...... 137, 138 Stanford University, Calif., Lagunita Santa Clara River Basin, Calif., canal at...... 154 gaging-station records in...... 129-133 San Francisquito Creek at...... 150 Santa Clara River near Saugus, Calif..129-130 Los Trances canal near...... 153 Santa Cota Creek, Calif., discharge Los Trancos Creek at...... 152 measurements of...... 36 17 Stanislaus River below Melones power Santa Maria, Calif., Cuyama River near. 142 house, Calif...... 230 Huasna River near...... 143 Middle Fork of, at Sand Bar Plat, Santa Maria River Basin, Calif., near Avery, Calif...... 228 gaging-station records in...... 142-143 North Pork of, near Avery, Calif..... 231 Santa Margarita, Calif., Salinas River South Fork of, near Long Barn, Calif. 232 near...... 144 Stanislaus River Basin, Calif., gaging- station records in...... 228-235