WATER TEMPERATURES OF CALIFORNIA STREAMS

SAN FRANCISCO BAY SUBREGION

OPEN-FILE REPORT U.S. DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY Water Resources Divis·ion Menlo Park, California, 1971 Prepared in cooperation with the CALIFORNIA DEPARTMENT OF WATER RESOURCES UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY Water Resources Division

WATER TEMPERATURES OF CALIFORNIA STREA:MB

SAN FRANCISCO BAY SUBREGION

By

J. C. Blodgett

Prepared in cooperation with the California Department of Water Resources

OPEN-FILE REPORT

0 I -0'\ Menlo Park, California 0 -M 1971

CONTENTS

Page Abstract------­ l Introduction------l Data-collection methods------2 Data accuracy------­ 3 Data characteristics------­ 3 Selected references------~------­ 6 Station data------~----- 7 Definit ion of terms and abbreviations------7 Station numbers------­ 7 Station descriptions------8_ Numerical index------­ 50 Alphabetical index------52

ILLUSTRATIONS

Page Figure l. Map showing hydrologic subregions of California------­ IV 2. Temperature conversion relation------­ 2 3. Sketch of typical gaging station------­ 2 4. Map showing water-temperature stations------9

TABLE

Page Table l. Summary of January and August water temperatures for period of record-- 4

Ill ______' -, Area of this report ' -. INYO ' ' SL ' _.,--·------

Q

~ 20 0 20 60 tOO MILES

I I I .I

FIGURE 1._Hydrologic subregions of California.

IV WATER TEMPERATURES OF CALIFORNIA STREAMS, SAN FRANCISCO BAY SUBREGION

By J. C. Blodgett

AreTRAcr

A summary of water-temperature records is presented for data collected through September 1968 in the San Francisco Bay Subregion of California. This report is one of a series covering the ll hydrologic subregions of the State and includes data for 87 stream sites.

Water temperatures, in degrees Celsius, are summarized by months, years, and for the period of record. A description is included to identify each station where data were collected. A tolerance interval analysis indicates that 99 percent of the point water-temperature observations, determined either with thermograph probes or hand-held thermometers, should be within ±0.6°C of the mean water temperature at the 95-percent confidence level. The probable total error ranges from ±0.8°C for periodic data to ±l.4°C for thermograph data.

INTRODUCTION

Water-temperature records collected through September 1968 are summarized for 87 stream sites in the San Francisco Bay Subregion of California. This report is one of a series which will present a compilation of stream temperatures for each of the ll hydrologic subregions of the State (fig. l) as defined by the California Region Framework Study Committee (1968).

Temperature records have been compiled for all stations operated by the Geological Survey and also for many sites where data were collected by other Federal and State agencies. Temperature data obtained systematically either once or twice per day or by thermograph for stations operated by the Geological Survey are published annually. Some periodic temperature observations (those obtained infrequently) collected by the Survey, as well as most of the thermograph and periodic records collected by other agencies, have never been published.

This report presents current and historic stream temperatures for purposes of correlating periodic and thermograph records and for analysis of the factors affecting these temperatures. The summary data for each site may also be used to provide guide­ lines for the establishment of thermal standards used in water-quality management. Through the 1968 water year, temperature summaries of periodic observations are presented for 87 sites, with durations up to 19 years. _Summaries of continuous records are presented for 18 sites (both periodic and continuous records are available at some sites). The first continuous water- temperature records were collected in 1952. Presently, continuous-temperature records are being collected by the

(I) Survey at 16 sites in the San Francisco w·~J0~- ----~----+-----~----1-----~~P'~----~----~ Bay Subregion. The data are summarized ~(f) in degrees Celsius (centigrade), and a ~~ ~u graph (fig. 2) is provided for ~~20~----~----+-----~--~q-----~----~----~----~ conversion to degrees Fahrenheit. ~~~.~ ~IX' UJ\!) This report was prepared by the ~ ~ 10~----+---~~----~----;------r- Geological Survey, Water Resources z Division, in cooperation with the California Department of Water Resources, as a part of investigations of the water 40 50 60 70 80 90 100 110 resources of the State of California. TEMPERATURE,IN DEGREES FAHRENHEIT The project is under the general super­ vision of R. Stanley Lord, district Figure 2.--Temperatur~ conversion relation. chief in charge of water-resources investigations in California, and under the immediate supervision of Willard W. Dean, chief of the Sacramento subdistrict office. A. E. Janssen scheduled the data for computer processing; computer programs for this study were prepared by Louise Nichols. The illustrations were prepared by M. E. Royce and F. A. Shelton. Water-temperature data provided by personnel of the California Department of Water Resources, Santa Clara Valley Water Conservation District, East Bay Municipal Utility District, and Marin County Water District are gratefully acknowledged.

DATA-COLLECTION METHODS

Periodic observations of water temperature are obtained by holding a thermometer in the stream and reading it while the bulb end is immersed. At thermograph sites, the thermometer is held in the water near the thermograph probe (the temperature­ sensing element of the thermograph). Continuous water-stage recorder In order to reduce the possibility of collecting erroneous or biased data, temperature stations are carefully selected and frequent inspections of the site are made. Where thermographs are housed in water-stage recorder shelters (fig. 3), the probe is placed inside a pipe located separately from the water-stage inlet pipes. Separate inlets are necessary to avoid sharp bends in the thermograph tube as well as to prevent obstruction of water movement in the intake pipe between the stream and gage well. Incorrect water temperatures may result if the probe is covered with silt, sand, or gravel, or if it is exposed to the air during periods of low flow.

Water-temperature collection sites are generally located far enough downstream from tributary inflow to insure that waters from the two streams are completely mixed. During snowmelt periods, stream­ temperature errors may range from l.7°C to 5°C at sites placed too close to the confluence of tribu­ Figure 3.--Sketch of typical gaging taries (Moore, 1967). Seasonal errors of this type station where both stage and water may go undetected. temperature are recorded.

2 DATA ACCURACY

Temperature-recording instruments are subject to mechanical error. According to manufacturers' specifications for instruments in good operating condition, the Stevens thermograph is accurate to ±2°F (about ±l°C) and the Weksler thermograph to ±l°F (about ±0.6°C).

The setting of the thermograph and corrections to the record are based on water-temperature readings obtained by hand-held thermometers of a type that, according to manufacturers' specifi­ cations, generally are accurate to lor 2 scale divisions [±0.5°F (about ±0.3°C) to ±loF (about ±0.6°C)].

Jones (1965) studied the relation between the average temperature of the stream and the point temperature obtained at the thermograph probe. Results of the study showed for the 24 thermograph installations on streams in California checked and 180 temperature traverses (cross sections surveyed at different flow conditions) there were only 11 instances when the probe temperature differed from the average stream temperature by more than l°F. Differences between point water temperatures in a cross section and the mean stream temperature were minimal for the 180 traverses surveyed. The temperature extremes in the cross sections differed by an average of ±O.l5°F from the mean. A measure of the ability of point observations (both hand-held thermometer readings and thermograph probes) to indicate the mean water temperature of a stream is given by the tolerance interval derived using the 180 water-temperature traverses. On the basis of this sampl e, an analysis of the tolerance interval indicates that 99 percent of the point water-temperature observations should be within ±l.l°F (±0.6oc) of the mean stream temperature at the 95-percent confidence level.

The accuracy with which the mean temperature of a stream is determined (at a given instant in time) depends on the magnitude of the various sources of error. The probable inaccuracies resulting from the sum of instrumental and thermometer placement. errors should be less than:

1. ±2.5°F (±l.4°C) for data obtained from Stevens thermographs. 2. ±l.8°F (±l.0°C) for data obtained from Weksler thermographs. 3. ±l.5°F (±0.8°C) for periodic data collected with hand-held thermometers.

DATA CHARACTERISTICS

Mean monthly water temperatures for January and August (the months that usually include the minimum and maximum temperatures during the year) and the recorded extremes for each of the tempera­ ture stations in the San Francisco Bay Subregion, are presented in table 1.

Confidence limits at the 95-percent level of the monthly means for January and August have been determined for stations with at least 3 years of thermograph record. The confidence interval of the monthly mean was not determined for stations with once or twice-daily observations or periodic data because the number of observations are generally insufficient to evaluate monthly means on an annual basis. Further, periodic data are biased because nearly all water-temperature observations are obtained between the hours of 0800 and 1700 and most diurnal fluctuations are not measured. At some stations, both periodic and thermograph water temperatures are measured.

3 Table 1.--Summary of January and August water temperatures

for period of record

Temperature, in oc

Extremes January August Station number 95-percent 95-percent Mini- Maxi- Monthly probability Monthly probability mum mum mean confidence mean confidence interval interval

11-1625 0 22 7 1.4 17 1.4 1625.4 6 20 9 15 1626 5 17 9 14 1626.3 8 21 1627.2 6 26 10 22

1627.22 8 21 13 19 1628 4 21 9 19 1629 6 27 24 1629.4 4 20 7 18 1629.5 11 28

1632 1 21 1645 2 21 9 19 1660 1 29 12 1665 8 21 9 19 1669 9 23 11

1670 8 19 11 1675 6 19 9 1676.6 6 28 1680 6 25 9 19 1690 7 29 12 22

1695 4 27 8 21 1698 4 28 8 22 1700 5 27 10 16 1715 6 24 21 1721 3 24 7 1722.2 6 21 1740 6 29 1760 7 29 8 1762 6 32 24 1764 7 28 8

1765 4 32 9 0.7 22 1.4 1766 6 20 9 1769 3 27 8 2.0 21 2.0 1790 0 31 8 0.7 23 1.3 1805 5 22 9 1807 6 30 8 1807.5 7 23 1810 2 26 6 1810.4 15 26 1814 5 21 11

If Table 1.--Continued

Temperature, in o.C

Station Extremes January August number 95-percent 95-percent Mini- Maxi- Monthly probability Monthly probability mum mum. mean confidence mean confidence interval interval ll-1820.3 5 27 9 21 1821 7 14 1824 7 22 18 1825 3 26 7 1830 3 28 7 21 1835 4 26 9 22 1836.5 10 23 1840 4 24 1845 7 28 1850 7 22 1851 8 27 4559.5 7 24 9 4560 3 33 10 1.8 21 1.5 4565 5 26 9 22 4570 3 24 9 18 4580 2 26 9 23 4582 3 24 9 20 4583.5 9 22 4585 4 28 9 23 4590 4 17 8 4595 6 21 9 18 46oo 3 22 9 18 4601. 6 22 7 4601.6 9 21 4601. 65 3 22 4601.7 4 18 8 16 4605 6 24 7 14 4607 6 31 4608 2 23 8 4609.2 0 23 7 1.6 15 3.8 4609.4 3 24 7 4610 3 31 9 0.9 25 3.2 4615 3 26 8 19 1.5 4620 3 24 9 0.8 16 2.0 4625 4 29 9 1.4 19 4627 2 28 8 4630 4 26 9 2.2 19 1.3 4632 3 27 8 24 4639 3 22 8 20 4639.4 4 21

4640 5 27 9 0 22 2.9 4640.5 7 15 9 4645 3 33 9 1.4 23 2.9 4652 3 25 10 1.6 20 1.5 4658 3 23 8 19 4670 4 28 9 1.5 23 0.7 4672 4 21 9

5 SELECTED REFERENCES

California Department of Water Resources, .1956, Quality of surface waters in California, 1951-1954: Water Quality Inv. R~pt. no. 15, 519 p. 1957, Quality of surface waters in California, 1955-1956: Bull. 65, 411 p. --1960, Quality of surface waters in California, 1957: Bull. 65-57, 342 p. --1960, Quality of surface waters in California, 1958: Bull. 65-58, 413 p. --1961, Quality of surface waters in California, 1959, Part 1. Northern and central --California: Bull. 65-59, 425 p. ' 1963, Quality of surface waters in California, 1960-1961, Volume 1. Northern and central --California, Part 2. Appendixes: Bull. 65-61, 477 p. 1965a, Quality of surface waters in California, 1962: Bull. 65-62, 410 p. --1965b, Hydrologic data, 1963, Volume 1. North coastal area: Bull. 130-63, 104 p. --1966a, Index of stream gaging stations in and adjacent to California: 136 p. --1966b, Hydrologic data, 1964, Volume 1. North coastal area: Bull. 130-64, 100 p. --1966c, Hydrologic data, 1965, Volume 1. North coastal area: Bull. 130-65, 93 p. --1968a, Hydrologic data, 1966, Volume 1. North coastal area: Bull. 130-66, 109 p. --1968b, Hydrologic data, 1967, Volume 1. North coastal area: Bull. 130-67, 79 p. --1968c, Dams within jurisdiction of the State of California: Bull. 17-68, 121 p. California Region Framework Study Committee, 1968, California Region framework study, water and related land resources, specifications and procedures: California State-Federal Interagency Group for the Pacific Southwest Inter-Agency Comm. Water Resources Council Rept., 12 p. Eisenhuth, H. P., 1969, Index of surface-water records to September 30, 1967, Part 11--Pacific slope basins in California: u.s. Geol. Survey Circ. 581 p. · Jones, E. J., 1965, Temperature of California streams, Part 1. Evaluation of thermograph records: u.s. Geol. Survey open-file rept., 31 p. Moore, A.M., 1967, Correlation and analysis of water-temperature data for Oregon streams: U.S. Geol. Survey Water-Supply Paper 1819-K, ?3 p. U.S. Geological Survey, 1959, Compilation of records of surface waters of the United States through September 1950, Part 11-B. Pacific slope basins in California, Central Valley: U.S. Geol. Survey Water-Supply Paper 1315-A, 459 p. 1964a, Compilation of records of surface waters of the United States, October 1950 to --September 1960, Part 11. Pacific slope basins in California: U.s. Geol. Survey Water-Supply Paper 1735, 715 p. 1964b, Quality of surface waters of the United States, 1962, Parts 9-14. Colorado River basin --to Pacific slope basins in Oregon and Lower Columbia River basin: U.S. GeoL _Survey Water­ Supply Paper 1945, 691 p. 1961-69, Water resources data for California: U.S. Geol. Survey ann. open-file rept., 3 pts. --1967, Quality of surface waters of the United States, 1961, Parts 9-14. Colorado River basin --to Pacific slope basins in Oregon and Lower Columbia River basin: U.S. Geol. Survey Water- Supply Paper 1885, 677 p. 1968, Quality of surface waters of the United States, 1960, Parts 9-14. Colorado River basin --to Pacific Slope basins in Oregon and Lower Columbia River basin: U.S. Geol. Survey Water­ Supply Paper 1745, 607 p.

6 STATION DATA

Definition of Terms and Abbreviations

The terms of water-temperature and other hydrologic data, as used in this report, are defined as follows:

Acre-ft: Acre-foot, the quantity of water required to cover an acre to a depth of 1 foot. An acre-foot is equivalent to 43,560 cubic feet.

Continuous records: Water-temperature records collected by (1) thermograph, (2) once-daily, or (3) twice-daily water-temperature observations. Cfs: Cubic foot per second. The rate of discharge of a stream with a channel 1 square foot in a cross-sectional area and whose average velocity is 1 foot per second.

Days of record: The number of days water-temperature records are available for determination of monthly mean and extremes.

°C: Degrees Celsius. Also known as degrees centigrade.

DWR: California Department of Water Resources.

Ft: Feet.

Periodic records: Water-temperature data obtained on an irregular basis and less frequently than continuous records.

Sq mi: Square mile.

Temperature station: A site on a stream or drainage ditch where water-temperature records are obtained.

Water year: A year begins October 1 and ends September 30. For example, water year 1967 begins October 1, 1966, and ends September 30, 1967.

Confidence interval (95 percent): A calculated interval about the mean where a given mean monthly water temperature will fall with a probability of 95 times out of 100.

Station Numbers

Stations are listed in downstream order with the same numbering system used in water-supply papers and annual data reports of the Geological Survey. A numerical index is included so that nearby stations may be identified. A second index listing the stations in alphabetical order is included following the numerical index.

Where available, station names and numbers assigned by the California Department of Water Resources also are included for cross-reference. An explanation of the State identification numbering system is given in the introduction of the annual report titled "Hydrologic Data," Bulletin 130 series (California Department Water Resources, 1968a and 1968b).

7 Station Descriptions

Location.--The location of each water-temperature station is described by latitude and longitude and, where available, by reference to township and range, Spanish Land Grant, County, and physical features such as tributary streams, highway bridges, towns, and miles above the mouth of the stream. Figure 4 shows the location of water-temperature stations.

Altitude of gage.--Altitude of zero point on staff gage, in feet above mean sea level.

Drainage area.--Area tributary to gage, in square miles.

Records available.--The type of record is listed, and the inclusive period of the record shown. Missing data or years when data were not collected are not defined. The availability of periodic records is given as the number of observations during the period of record. At some sites, periodic observations have been made for many years, and, in addition, thermographs operated for a shorter period of time. In these instances, both records are given.

Average discharge.--Average of all daily flows for entire period of record, in cubic feet per second.

Remarks.--Upstream regulation by reservoirs or powerplants that may affect water temperatures is noted. The record was subdivided at the end of the water year during which regulation began.

At some stat ions, several agencies collected data for overlapping periods of record. These records are listed under one station description, and credit is given to the agencies that furnished t he records.

Extremes.--Water-temperature extremes and their dates of occurrence are presented for both continuous and periodic data.

8 EXPLANATION

1628 • 39° Water-temperature station and identification number

0Eo3:E:::a::s::EI0~=:==:=3:2 0= ==::::~30 MILES

\ CLARA ~B~os~e~fr~om~U~.~S~.G~e-o~lo-g~ic-o~I~S-ur-v-ey------L------~37° California 1:1,000,000, 1954 FIGURE 4 .-Water-temperature stations

9 PESCADERO CREEK BASIN USGS: 11-1625. PESCADERO CREEK NEAR PESCADERO, CALIF. DWR: E-8-3100

LQ~~llQ~.--LAT 37 15 40, LONG 122 19 40, SW1/4 SEC. 5, T.8 S, R.4 W, ON LEFT RANK AT DOWNSTREAM SIDE OF HIGHWAY BRIDGE, 3.0 MILES EAST OF PESCADERO AND 5.3 MILES UPSTREAM ~ROM MOUTH, SAN MATEO COUNTY. ALlllUQE_Qf_G!GE.--62 FT ABOVE MEAN SEA LEVEL. QBAl~AGE_A&EA·--45.9 SQ. MI. &E~Q&Q~-~~AlL~aLE·--147 PERIODIC OBSERVATIONS FROM APRIL 1951 THROUGH SEPTEMBER 1968. CONTINUOUS RECORD FROM OCTOBER 1964 THROUGH SEPTEMBER 1968. A~ER!GE_Ql~~tlA&GE.--41.6 CFS FOR 16 YEARS OF RECORD. &EM~B~~.--RE G ULATION OF FLOW NOT SIGNIFICANT. E!l&EMES.--CONTINUOUS DATA: MAXIMUM = 22 DEG. C, AUG. 9, 1965, JULY 22t 1966, JULY 23t 1966, JULY 24, 1966, JULY 31, 1966 JULY 12, 1968 MINIMUM = 2 OEG. C, DEC. 18, 1965 PERIODIC DATA: MAXIMUM 22 DEG. C, AUG. 6, 1964 MINIMUM ·= 0 DEG. C, JAN. 26, 1957

WATER TEMPERATURES FROM THERMOGRAPH DATA, DEGREES CELSIUS

:tEA& au... 1':10~ ... Of~ ... J~l':i& EEll.a. MARa. AfB.a. HAY JUri£ JUU AUG .a. s~ 1965 MAXIMUM: ** ** •• •• •• •• •• •• •• •• •• •• MEAN: ** ** •• •• •• •• •• •• •• •• •• •• MINIMUM: •• •• •• •• •• •• • • •• •• •• •• •• 1966 MAXIMUM: •• 13 9 11 11 14 17 17 21 22 21 19 MEAN: •• lD 6 1 9 11 14 14 17 18 18 16 MINIMUM: •• 1 2 4 6 1 11 12 12 13 14 12 1967 MAXIMUM: 18 14 12 12 •• 13 12 18 20 21 19 19 MEAN: 13 11 9 8 •• 9 10 13 15 18 17 17 Ml NI MUM: 9 7 5 4 •• 6 8 9 12 15 15 14 1968 MAXIMUM: 17 14 11 11 13 14 16 21 21 22 21 20 MEA N: 14 12 7 1 11 11 12 14 17 18 17 16 MINIMUM: 10 7 4 3 8 9 8 11 12 14 13 11

1965- MAXIMUM: 18 14 12 12 13 14 17 21 21 22 21 20 1968 MEAN: 14 11 1 7 10 10 12 14 16 18 17 16 MI NIMUM: 9 7 2 3 6 6 8 9 12 13 13 11 DAYS OF RECORD: 62 80 53 59 51 92 9i 95 112 117 117 91

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERI OD QLBEC.UBI.l QC.la. ~a~ ... QEC..a. J!~ ... EEll.a. t:l!R.a. AfBa. HAY J!llif JULY AUG .a. Sff.a.

1951-63 MAXIMUM: 17 13 13 ll 13 14 17 17 19 21 22 19 MEAN: 14 11 8 7 9 10 13 14 16 17 18 16 MI NIMUM: 10 4 5 0 5 7 10 13 10 1 16 11 DAY S OF RECORD: 12 13 11 13 11 11 18 13 13 12 11 9

US GS: 11-1625.4 BUfANO CREEK NEAR PESCADERO, CALI F. DWR: D- 0-5200 LlJC.Aill.lff· --LAT 37 14 1, LOt-.lG 122 21 56, SEC. o, T.O R.O . IN BUTA 'JO GKA NT, ON RIGHT BANK 0.15 MILE BELOW UNNAMED TRIBUTARY' AND 1.7 MILES SOUTH EAST OF PESCADERO, SAN MATEO COUNTY. !LlliUQE_QE_GAGE.--70 fT ABO VE MEAN SEA LEVEL. OBAl~AGE_A S EA.--18.1 SQ. MI. BE~QiQS_~~~lLAaLE.--59 PERIODIC OBSERVATIONS FROM JULY 1962 THROUGH SEPTEMBER 1968. NO CONTit-.lUDUS RECURDS. A~t~~~E-QlSC.tlABG E .-- BEt:lA B ~S.-- REG ULATI O N OF FLOW NOT SIGNIFICANT. REC ORDS FURN ISHED BY CALIFORNIA DEPARTMENT OF WATER RESOURCES. EXI&EMES.--P i RIUOIC DATA: MAXIMUM 20 DE G. c, JULY 7, 1966 Ml !\j iMU M = 6 DFG. c, FEB. 2'5, 1965

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERI OD ULBEC. \J !Hl uc.r ... t:llJll.o. QEC..a. J!~ ... Efll.a. ~AR.a. AfB.a. MAY JUt:lf JULY AUG .a. Sfe.._

1'162-68 MAXIMUM: 14 14 12 ll 11 13 14 13 16 20 16 11 MEAN: 12 11 10 9 9 12 12 12 14 16 15 17 MINIMUM: 10 7 1 6 6 10 11 12 12 12 14 16 DAYS OF RECORD: 4 5 5 5 6 5 6 4 1 1 3 2

10 PURISIMA CREEK BASIN USGS: 11-1626. PURISIMA CREEK NEAR HALF MOON BAY, CALIF. DWR: E-B-2100

LQ~AllQ~.--LAT 37 26 6, LONG 122 22 23, SEC. o, T.O , R.O IN CA~ADA DE VERDE Y ARROYO DE LA PURISIMA GRANT, ON LEFT BANK 15 FT DOWNSTREAM FROM COUNTY ROAD BRIDGEt 3.6 MILES SOUTHEAST OF HALF MOON BAY AND 4.0 MILES UPSTREAM FROM MOUTH, SAN MATEO COUNTY. ALll!UQf_Qf_~A~f.--380 FT ABOVE MEAN SEA LEVEL. QBAl~AGf_ABfA.--4.83 SQ. MI. Bf~QBQS_A~AlLAfiLE.--94 PERIODIC OBSERVATIONS FROM OCTOBER 1958 THROUGH SEPTEMBER 1968. NO CONTINUOUS RECORDS. A~fBAGf_QlS~tlABGf.--3.01 CFS FOR 9 YEARS OF RECORD. BfMAB~S.--REGULATION OF FLOW NOT SIGNIFICANT. f~IBf~fS.--PERIODIC DATA: MUIMUM 17 DEG. C, AUG. 6, 1964 MINIMUM = 5 DEG. C, DEC. 30, 1960

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QL&f~QB!l au... ~a~ ... llU~ ... .!At:l ... Ef.e. ... MR... AeB.... ~AY Jlllif .JUU AUG ... Sf.f.o.

1959-68 MAXIMUM: 16 14 13 12 11 12 12 13 l3 15 17 16 MEAN: 13 11 9 9 9 10 11 11 12 14 14 12 MINIMUM: 10 7 5 6 8 7 9 9 12 13 13 8 OAYS OF RECORD: 12 9 10 10 7 6 8 6 7 5 7 7

PILARCITOS CREEK BASIN USGS: 11-1626.3 PILARCITOS CREEK AT HALF MOON BAY, CALIF. DWR:

LQ~AllQ~.--LAT 37 ?.8 7, LONG 122 26 8, SEC. O, T.O , R.O t ON NORTH BOUNOARY OF MIRAMONTES GRANT, ON LEFT BANK 0.2 MILE DOWNSTREAM FROM STATE HIGHWAY 1, 0.5 MILE NORTHWEST OF TOWN OF HALF MOON BAY, AND 1.0 MILE UPSTREAM FROM MOUTH, SAN MATEO COUNTY. ALlllUQf_Qf_~AGf.--24 FT ABOVE MEAN SEA LEVEL. ll&Al~AGf_ABfA.--27.2 SQ. MI. Bf~QB!lS_A~AlLA6LE.--?O PERIODIC OBSERVATIONS FROM MARCH 1967 THROUGH AUGUST 196B. NO CONTINUOUS RECORDS. A~fBAGE_QlSCtlAB~f.-- BE~AB~S.--SIGNIFICANT REGULATION OF FLOW BEGAN IN 1900. f~lBEMfS.--PERIOOIC DATA: MAXIMUM 21 DEG. C, JULY 2, 1968 MINIMUM = 8 DEG. C, JAN. 5, 1968, JAN. 31, 1968

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD OLBE~D.Bll IJ.C.I ... t!I.IJ~ ... QEC..a. J.A!:i.a. EE!l..a. MARa. Af& ... .t!AY J.UJ':jf J.UU AUG.a. Sf.f.a. 1967-68 MAXIMUM: 14 16 9 13 13 16 17 14 21 18 15 MEAN: 14 16 9 13 13 13 17 14 19 18 15 MINIMUM: 14 16 9 13 12 10 17 13 17 18 15 DAYS OF RECORD: 1 1 1 1 2 4 2 2 2 1 1

COLMA CREEK BASIN USGS: 11-1627.2 COLMA CREEK AT SOUTH SAN FRANCISCO, CALIF. DWR: E-7-2500 LQC.AllD.t!I.·--LAT l7 39 14, LONG 122 25 31, SEC. O, T.O , R.O IN BURl BURl GRANT, ON LEFT BANK IN ORANGE MEMORIAL PARK, 1.0 MILE SOUTHWEST OF SOUTH SAN FRANCISCO POST OFFICE, SAN MATEO COUNTY. ALlllUQf_Qf_GAGf.--13 FT ABOVE MEAN SEA LEVEL. Q&Al~AGE_A&fA·--10.9 SQ. MI. &f~QBO~-A~AlLAaLE·--52 PERIODIC OBSERVATIONS FROM FEBRUARY 1960 THROUGH AUGUST 1968. NO CONTINUOUS RECORDS. A~fBA~f-DlS.C.tlABGf.-- BfMAB~S.--REGULATION OF FLOW NOT SIGNIFICANT. f~lBft:lES.--PERIOOIC DATA: MAXIMUM 26 DEG. C, AUG. 19, 1964 MINIMUM = 6 DEG. C, DEC. 15, 1967

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD IJLRE~QBO uu... riO~ ... llfC.... J.Ati ... EE.a ... ~AR.a. A.fB.... HAY .Hllif J.UU AUG .a. Sf.f.a. 1960-68 MAXIMUM: 22 17 15 11 18 21 19 18 23 25 26 23 MEAN: 18 14 11 10 11 21 16 16 18 20 22 20 MINIMUM: 16 13 6 9 7 21 13 14 13 17 17 15 DAYS OF RECORD: 5 7 7 3 7 1 5 3 3 3 5 3

11 COLMA CREEK BASIN USGS: 11-1627.22 SPRUCE BRANCH AT SOUTH SAN FRANCISCO, CALIF. DWR: E-7-2505

LQ,AllQ~.--LAT 37 3S 46, LONG 122 25 15, SEC. o, T.O , R.O IN BURl BURl GRANT, ON RIGHT BANK 0.5 MILE UPSTREAM FROM MOUTH AND 1.0 MILE SOUTHWEST OF SOUTH SAN FRANCISCO POST OFFICE, SAN MATEO COUNTY. ALillUQf_Qf_GAGE.--6 FT ABOVE MEAN SEA LEVEL. Q&Al~AGE_A&EA.--1.68 SQ. MI. Bf,Q&Q~-A~AlLA5LE.--34 PERIODIC OBSERVATIONS FROM NOVEMBER 1964 THROUGH SEPTEMBER 1968. NO CONTINUOUS RECORDS. AYf&AGE_QlSCtlA&GE·-- Bf~ABKS·--REGULATION OF FLOW NOT SIGNIFICANT. f!IBEMfS.--PERIOOIC DATA: MAXIMUM 21 DEG. C, AUG. 5, 1968, SEP. 5, 196B MINIMUM = 8 DEG. C, FEB. 1, 1966

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QLB.E,Q&D ar.r ... fiQll ... QEI..a. JA~ ... EE!l.a. !:!A& .a. Af. B-. !:lAY J!Jt:lf JIJU AU.G.a. S.Ef..a. 1965-6B MAXIMUM: 19 19 16 14 15 19 17 18 19 20 21 21 MEAN: 19 16 14 13 12 14 16 17 19 19 19 21 MINIMUM: 18 14 12 11 8 11 15 l7 18 18 18 19 DAYS OF RECORD: 2 3 4 4 5 3 2 2 2 2 3 2

REDWOOD CREEK BASIN USGS: 11-1628. REDWOOD CREEK AT REDWOOD CITY, CALIF. DWR: E-6-9005

LOI.AllQ~.--LAT 37 26 58, LONG 122 13 57, SEC. o, T.O , R.O , IN PULGAS GRANT, AT MENLO COUNTRY CLUB, ON RIGHT BANK 200 FT UPSTREAM FROM ALAMEDA DE LAS PULGAS BRIDGE AND 2.5 MILES SOUTH OF REDWOOD CITY POST OFFICE, SAN MATEO COUNTY. ALlllUQ.E_Qf_GAGf.--84 FT ABOVE MEAN SEA LEVEL. DBAlfiAGE_A&.EA·--1.82 SQ. MI. Bf,QRQ~_AllAlLA5Lf·--55 PERIODIC OBSERVATIONS FROM JANUARY 1960 THROUGH AUGUST 1968. NO CONTINUOUS RECORDS. AYf&AGE_QlSI.tlA&GE·--0.870 CFS FOR 8 YEARS OF RECORD. &E!:!AB~S.--REGULATION OF FLOW NOT SIGNIFICANT. f!IBf!:!ES.--PERIODIC DATA: MAXIMUM 21 DEG. C, JULY 17, 1967 MINIMUM = 4 DEG. C, FEB. 11, 1960

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QL&E,Q&Q Q,I... t~HlY.a. QE,... JAti.a. E.EB. ... t!AB.a. AfR.a. t!AY Jutif JULY AU.G... .ste. ...

1960-68 MAXIMUM: 19 16 13 11 12 16 14 15 19 21 20 19 MEAN: 16 13 9 9 9 13 12 13 15 18 19 18 MINIMUM: 12 8 6 6 4 12 11 ll 12 16 18 17 DAYS OF RECORD: 5 7 3 6 6 3 • 5 5 1 2 4 2

ATHERTON DRAINAGE CHANNEL BASIN USGS: 11-1629. SHARON CREEK NEAR MENLO PARK, CALl F. DWR: E-6-9010 LQ,AllQf:i.--LAT 37 25 45, LONG 122 13 2, SEC. o, T.O , R.O IN PULGAS GRANT, AT ATHERTON CITY BOUNDARY, 900 FT UPSTREAM FROM ATHERTON DRAINAGE CHANNEL AND 2.6 MILES SOUTHWEST OF MENLO PARK, SAN MATEO COUNTY. ALlliUQE_Qf_GAGE.--146 FT ABOVE MEAN SEA LEVEL. Q&AltiAGf_A&fA.--0.380 SQ. MI. &.f,Q&Q~_AllAlLARLE.--21 PERIODIC OBSERVATIONS FROM NOVEMBER 1961 THROUGH SEPTEMBER 1968. NO CONTINUOUS RECORDS. AllE&.AGE_QlSI.tlA&GE.--0.140 CFS FOR 9 YEARS OF RECORD. &f!:!AB~S.--REGULATION OF FLOW NOT SIGNIFICANT. f!l&f!:!ES.--PERIODIC DATA: MAXIMUM 27 DEG. C, AUG. 3, 1967 MINIMUM = 6 DEG. C, DEC. 12, 1967

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QLRE,QRll QCI.a. tiDY ... Qf~ JA~ ... E.Ea... t!A&... .AeL. !:lAY J!Jt:lf JIJU AU.G.a. .Sf£... 1962-68 MAXIMUM: 17 16 6 13 13 17 16 24 27 23 MEAN: 14 16 6 12 ** 13 15 16 24 24 22 MINIMUM: 13 16 6 9 ** 13 13 16 24 23 21 DAYS OF RECORD: 3 1 1 3 **0 2 3 1 1 3 2

12 SAN FRANCISQUITO CREEK BASIN USGS: 11-1629.4 SAN FRANCISQUITO CREEK BL LADERA DAMSITE, NR STANFORD UNIV., CALIF. DWR: E-6-2275

LC~!llQ~.--LAT 37 24 24, LONG 122 12 11, SEC. D, T.O , R.O ON NORTH BOUNDARY OF EL CORTE DE MADERA GRANT, 1.2 MILES UPSTREAM FROM LOS TRANCOS CREEK, 0.5 MILE NORTHWEST OF LADE~A SCHOOL, AND 2.3 MILES SOUTHWEST OF STANFORD UNIVERSITY POST OFFICE; SANTA CLARA COUNTY. ALillUOf_Qf_GAGf.--177 FT ABOVE MEAN SEA LEVEL. D&Al~AGf_ARfA·--28.5 SQ. MI. Rf,QRQS_A~AlLABLf·--50 PERIODIC OBSERVATIONS FROM OCTOBER 1961 THROUGH SEPTEMBER 1968. NO CONTINUOUS RECORDS. A~fRAGf_OlS~tlARGf.--16.1 CFS FOR 6 YEARS OF RECORD. REMARKS.--SIGNIFICANT REGULATION OF FLOW BEGAN IN 1900. fXIRfMfS.--PER10DIC DATA: MAXIMUM 20 DEG. C, AUG. 1, 1963 MINIMUM = 4 DEG. c, JAN. 16, 1963

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QL&f~Q.IHl Q~I ... ~Q.Il ... Of~ ... JA~ ... EEa ... && ... Af&... MAY Jl..llif JULY AUii.. Sff& 1962-68 MAXIMUM: 16 14 12 9 15 16 17 18 17 20 19 MEAN: 15 12 9 7 12 14 14 16 16 18 18 MINIMUM: 13 8 7 4 10 11 12 14 15 16 16 DAYS OF RECORD: 4 7 4 8 3 3 3 4 3 5 4

USGS: 11-1629.5 SAN FRANCISQUITO CREEK TRIBUTARY NEAR STANFORD UNIVERSITY, CALIF. DWR: E-6-2255

LQ,AllQ~.--LAT 37 24 43, LONG 122 11 52, SEC. O, T.O t R.O IN PULGAS GRANT, ON LEFT BANK 130 FT UPSTREAM FROM MOUTH, 200 FT DOWNSTREAM FROM RANCH RD BR, 0.4 Ml W OF GATE AT ALPINE RO, AND 1.8 Ml SOUTHWEST OF STANFORD UNIVERSITY POST OFFICE, SANTA CLARA COUNTY. ALlllUOf_Qf_GAGf.--175 FT ABOVE MEAN SEA LEVEL. DRAl~AGf-ARfA·--0.260 SQ. MI. Rf,Q&OS_A~AlLAaLf.-- 6 PERIODIC OBSERVATIONS FROM JUNE 1964 THROUGH MARCH 1965. NO CONTINUOUS RECORDS. A~fRAGf_QlS~tlABGf.--0.040 CFS FOR 6 YEARS OF RECORD. R.EMARKS.--SIGNIFICANT REGULATION OF FLOW BEGAN IN 1900. fXIRf~fS.--PERIODIC DATA: MAXIMUM 28 DEG. C, JULY 15, 1964 MINIMUM = 11 DEG. C, DEC. 28, 1964

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QL&f,QBO Q~I ... t:iQ.Il ... D.f,... JA~ ... E.Ea ... MAR ... Ae&.a. &Y JUtif JULY AUG ... Sff.a. 1964-65 MAXIMUM: ** ** 11 13 ** 21 ** ** 16 2B ** •• MEAN: ** ** 11 13 ** 17 ** ** 16 28 ** ** MINIMUM: ** ** 11 13 ** 12 ** ** 16 28 ** •• DAYS OF RECORD: 0 0 1 1 0 2 0 0 1 1 0 0

USGS: ll-1632. LOS TRANCOS CREEK TRIBUTARY NEAR STANFORD UNIVERSITY, CALIF. DWR: E-6-2235

Ul~AllQ~.--LAT 37 24 18, LON G 122 11 9, SEC. o, T.O , R.O , IN EL CORTE DE MADERA GRANT, ON RIGHT BANK 350 FT EAST OF WOODEN WATER TANKS, 0.4 MILE EAST OF LADERA, 0.6 MILE UPSTREAM FROM MOUTH, AND 1.7 MILES SOUTHWEST OF STANFORD UNIVERSITY POST OFFICE, SANTA CLARA COUNTY. ALlliUQ.E_Qf_GAGf.--269 FT ABOVE MEAN SEA LEVEL. ORAl~AGf_ABfA.--0.470 SQ. MI. Bf,QBQS_A.IlAlLAaLf.-- 8 PERIODIC OBSERVATIONS FROM JANUARY 1962 THROUGH DECEMBER 1965. NO CONTINUOUS RECORDS. A.llfBAGf_QlS~tlABGf.--0.040 CFS FOR 8 YEARS OF RECORD. BfMAB~S.--REGULATION OF FLOW NOT SIGNIFICANT • .EXIBfMES.--PERIOOIC DATA: MAXIMUM 21 DEG. C, MAR. 19, 1965 MINI MUM = 1 DEG. C, JAN. 22, 1962

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QLB.E,QBQ Q,I... ttQ.Il ... DE,... JU... EEa.a. t!AB.a. Aea... t!A:t JUtif JULY AUG ... Sff& 1962-66 MAXIMUM: ** ** 9 9 12 21 16 ** ** ** ** ** MEAN: ** ** 8 5 12 17 16 ** ** ** ** ** MINIMUM: ** ** 7 1 12 13 16 ** ** ** ** DAYS OF RECORD: 0 0 2 2 1 2 1 0 0 0 0 ••0

13 SAN FRANCISQUITO CREEK BASIN USGS: 1l-1645. SAN FRANCISQUITO CREEK AT STANFORD UNIVERSITY, CALIF. OWR: E-6-2225

LQ~AllQ~.--LAT 37 25 24, LONG 122 11 18, SEC. O, T.O , R.O IN SAN FRANCISOUITO GRANT AT GOLF COURSE, ON RIGHT BANK 1.1 MILES OOW~STREAM FROM LOS TRANCOS CREEK AND 1.1 MILES WEST OF STANFORD UNIVERSITY POST OFFICE, SANTA CLARA COUNTY. ALlllUQf_Qf_GAGE.--116 FT ABOVE MEA~ SEA LEVEL. ll&Al~AGLA!!.EA---37'.5 so. Ml~ &f~QBQS_A~AlLABLf·--183 PERIODIC OBSERVATIONS FROM NOVEMBER 1950 THROUGH AUGUST 1968. NO CONTINUOUS RECORDS. A~f&AGf_QlS~tlA&G£.--17.6 CFS FOR 28 YEARS OF RECORD. &tMAB~S.--SIGNIFICANT REGULATION OF FLOW BEGAN IN 1900. fXl&E~fS.--PERIODIC DATA: MAXIMUM 21 DEG. C, AUG. 1 0 1966 MINIMUM = 2 DEG. C, DEC. 15 0 1967

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIO D QL&E~ :.J &Q Q~I ... ~all ... Of~ ... JAI!t.a. EEB.a. MA&.a. !fAa. MAY JUt:lE JULY AU.G.a. .ste... 1951-68 MAXJfi.UM: 9 14 12 11 14 16 18 18 19 19 21 20 MEAN: 9 12 9 9 11 11 13 15 17 17 19 16 MINIMUM: 9 9 2 4 6 8 11 12 15 16 17 9 DAY S OF RECORD: 1 9 8 29 48 35 19 12 10 3 5 4

MATADERO CREEK BASIN USGS : ll-1660. MATADERO CREEK AT PALO ALTO, CALIF. OWR: E-6-1100

LU~All Q~ .--L A T 37 25 10 , LON G 122 8 10, SEC. o, T.O , R.O , IN RI NCON DE SA N FRANCISQUITO GRANT, ON RIGHT BANK ON ASH STREET, 150 FT UPST REliM FR OM LAMBERT "VENUE BRIDGE, liND 2.1 MILES SOUTHEAST OF POST OFFICE AT PAL O ALTO, SANTll CLARA COUNTY. ALlliUQE_Qf_ ~ AGf.--22 FT ABOVE MEAN SEA LEVEL. QBAl~AGf_A&EA·--7. 2 4 SQ. MI. BE~QBQ~-A~AlLA ti L E .--1 9 PeRI ODIC OBSERVATIONS FROM DECEMBER 1952 THROUGH AUGUST 1968. NO CONTI NU OUS RECOROS. AllfBAGf_QlSCtlA&G£.--1.36 CFS FUR 15 YEARS OF RECORD. !iftlAB.IS.:i·-- REG uL·ATI ON OF FLOW NOT SIGNIFICANT. EXl!if~~S.--P C RIODIC DATA: MAXI MUM 29 DEG. C, SEP. 8, 1965 MINII~U~1 = 1 DEG. C, FEB. 16, 1956

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PeR lOll UL&ECQBQ au... !:::10~ ... QE~ ... JA!:ll.a. fEB. .a. MA&.a. Ae& ... MAY JUt:lE JULY AUG .a. .SEe ... 1953-&8 MAXI MU M: 12 13 12 13 17 Mt'AN: ** ** •• ** 28 29 •• 10 12 7 12 17 ** ** ** 25 29 MINIMUM: 9 11 1 10 17 22 29 DAYS •• ** ** ** OF REC ORD: 0 5 4 3 2 1 0 0 0 2 1

STEVENS CREEK BASIN

US GS: 11-1665. STEVE •NS CREEK NEAR CUPERTINO, CALIF. OWR: E- 6-3100

LQ~AllQ!:li.--L~T 37 18 20 , L O ~G 122 4 25, SW1/4 SEC. 22, T.7 s; R.2 w, 0~ LEFT C ~ N K UN D U W N STREA~ SIDE OF HI GHWAY BRIDGE, 0.6 MILE DOWNSTREAM FROM STEV ENS CR EEK DA M AND 2.5 MILES SOUTHWEST OF CUPERTINO, SANTA CLA ~ A COUNTY. ALlllUQE_QE_~AGf.--385 FT AB OVE MEAN SEA LEVEL. DBAljAGf_AafA.--18.1 SW. MI . BE~UaQ~_AtAlLAaLE.--49 PERIODIC OBSERVATIONS FROM JANUARY 1950 THROUGH OCTOBER 1959. NO CO~TINUOUS REC ORDS. A~E&AGf_Ql~~tlA&Gf.--12.6 CFS FOR 30 YEARS OF RECORD. &EMAB~S.--SI G NIFICANT REGULATION OF FLOW BEGAN IN 1936. E~l&E~f~.--P E RIOOIC DATA: ~1AX !MU M 21 DEG. C, AUG. 30, 1958 MI NIMUM = 8 DEG. C~ JAN. 25, 1950, FEB. 17, 1950

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIO D UE?&E~QBQ or.r ... !::lOt ... QE~ ... JA!:ll.a. Efli.a. MA&.a. AI?.&... MAY JUt:lf JULY AUG ... .s.fe ... 1950-60 MAXIMUM: 18 14 13 11 13 12 14 13 17 19 21 19 MEAN: 13 13 13 9 11 10 12 11 15 14 19 16 MINIMUM: 10 12 13 8 8 9 11 10 13 11 16 11 DAYS OF RECORD: 2 1 4 5 7 2 3 5 3

14 GU~DALUPE RIVER BASIN

USGS: 11-1669. ALAMITOS CREEK NEA~ NEW ALMADEN, CALIF. OwR: E-6-5450

LQ~AllQ~.--LAT 37 13 21, LON G 121 51 o, SEC. o, T.O , R.O I~ PU EB LO LAN~S OF SAN JOSE GRA~T, ON LEFT HANK AT GREYSTONE BRIDGE, 1.1 MIL ES [l!lW'IISfK EAM f'ROI-I ARROYO CALE~O, 3.4 MILES SOUTHWEST OF EDE~V~LE, . N9 1.5 MIL ES NORTHWEST OF NEW ALMADEN, SANTA CLARA COUNTY. ALlllUQf_Qf_GAG~.--247 FT ABU VE MEA'II SEA LEVEL. DRAl~AGE_A~f~.--11.9 SQ. MI. ~E~Q3Q~_AiAlLA8LE.--60 P~RI OD IC OBSERVATIONS FROM APRIL 1958 THROUGH SEPTEMBER 196B. NO CUNTINlHlUS Rt CtJRDS. A~ERAGf_Ql~~tlA~Gf.--!6.7 CFS FOR 9 YEARS OF RECORD. REM8 &~ S.--SIGNIFICA N I REG ULATION OF FLOW BEGAN IN 1900. E~IREM~S.--PERIO D IC D ~TA: MAXIMUM ?3 UEG. C, JULY 7, 1967 MI'IIMUM z 9 D': G. C, JAN. 4, 196!, MA'l.. 3, 1966

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERI OO OLRE~QBQ Q~l£ NUll£ QE~£ JAN£ EEli£ MAB. ... Af.B..a. MAY JUNE JULY AUG ... .S.f£. ... 1958-68 MAXIMUM: 21 17 11 12 16 21 19 19 20 23 22 22 MEAN: 19 16 11 11 14 14 16 17 17 22 22 20 MINIMUM: 17 13 10 9 ll 9 13 12 15 20 22 18 DAYS OF REC ORD: 3 ] 3 6 5 8 7 9 5 5 1 5

USGS: 11-1670. ALAMITOS CREEK NEAR EDENVALE, CALI F. DWR: E-6-5400

LQ~AllQN.--LAT 37 14 8 , LO NG 121 52 8, SW1/4 SEC. 16, T.8 S, R.1 E, tJN RIGHT ~ A N K 0.6 MILE UPSTREAM FROM CONFLUENCE WITH GUADALUPE CREEK AND 3.2 MILfS SOUTHWEST OF EDENVALE, SANTA CLARA COUNTY. ALlllUUf_QE_GA~£.--200 FT AB OVE MEAN SEA LEVEL. QB.Al~AGE_ABEA·-~34.6 so. MI. B.E~QBQ.S._AllAlLAfiLE.--50 PERI OD IC OBSERVATIONS FROM JANUARY 1950 THROUGH MARCH 1958. NO CON TINUOUS RF.COROS. A~fRAGE_Ql.S.~tlABGE.--17.5 CFS FOR 28 YEARS OF RECORD. BE~ABKS.--SI GN IFICANT KEGULATION OF FLOW BEGAN IN 1935. fXIBfMf.S..--PfRIODIC DATA: MAXIMUM 19 OEG. C, MAY 18, 1956 MINIMUM = 8 DEG. C, JAN. 25·, 1950, JAN. 24, 1957

WATER TEMPERATURES FROM PERIODIC DATA, tlEGREES CELSIUS PERIOD i.!LB.E.~Q!W !J.~l£ NO~ ... DE.~ ... JA~ ... Efll. ... MAB..a. Af. B. .a. MAY JUI::lf JULY AUG ... .S..E.e. ... 1950-51! MAXIMUM: 17 15 14 14 18 18 19 18 ** 18 11 MEAN: ** 15 13 11 12 13 15 14 17 18 11 MINIMUM: ** 13 12 8 11 9 12 11 16 ** 18 11 DAYS OF RECORD: **0 4 5 10 5 13 4 5 2 **0 1 1

USGS: 11-1675. GUADALUPE CREEK AT GUADALUPE, CALl F. DWR: E-6-5300

L!J.~AllQ~.--LAT 37 13 5, LONG 121 54 35, SW1/4 SEC. 19, T.8 S, R.1 E, ON LEFT BANK 0.5 MILE NO~THWEST OF GUADALUPE AND 3.5 MILES UPSTREAM FROM CONFLUENCE WITH ALAMITOS CREEK, SANTA CLARA COUNTY. ALlllUQf_Q[_~A~f.--325 FT 4BOVE MEAN SEA LEVEL. QBAl~A~f_AafA.--12.7 sw. MI. Bf~!J.BQ.S._A~AlLAULE·--46 PERIODIC OBSERVATIONS FROM JANUARY 1950 THROUGH SEPTEMRER 1959. NO CONTINUOUS RECORDS. A~.EBAG~_Ql.S.CtlARG£.--11.1 CFS FOR 30 YEARS OF RECORD. BfMABKS.--SIGNIFICANT REGULATION OF FLOW BEGAN IN 1936. f~lBfMf.S..--P E RIODIC DATA: MAXIMUM 19 DEG. C, AUG. 7, 1956 MINIMUM z 6 DEG. C, JAN. 25, 1954

WATE'!. TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD OE...,B.E~!J.BQ !J~I ... ~all ... Llf~£ JAN ... EEli£ tiAB£ Af. B... MAY JUI::l.f JUU AUG ... .S.ff. ... 1950-59 MAXIMUM: 14 16 14 l3 13 16 l3 17 15 17 19 18 MEAN: 12 12 12 9 ll 12 13 13 14 14 18 12 MINIMUM: 11 8 9 6 9 11 12 11 13 12 17 7 DAYS OF RECORD: 4 4 2 5 5 7 3 6 2 3 2 3

15 GUADALUPE RIVER BASIN USGS: 11-1676.6 ROSS CREEK AT SAN JOSE, CALIF. DWR: E-6-9300

LQ~AllQ~.--LAT 37 14 56, LONG 121 54 45, SE1/4 SEC. 12, T.a s, R.1 W, ON RIGHT RANK 200 FT UPSTREAM FROM HARWOOD AVENUE, 600 FT DOWNSTREAM FROM LONE HILL CREEK, AND AT SOUTH CITY LIMITS OF SAN JOSE, SANTA CLARA COUNTY. ALlllUQE_Qf_GAGE.--204 FT ABOVE MEAN SEA LEVEL. QBAl~AGf_ABfA.--5.70 SQ. MI. BfCUBQS_A~AlLAaLf.--29 PERIODIC OBSERVATIONS FROM DECEMBER 1961 THROUGH SEPTEMBER 196a. NO CONTINUOUS RECORDS. A~fBAGf_QlS~tlABGf·--2.46 CFS FOR 6 YEARS OF RECORD. &f~ABKS.--SIGNIFICANT REGULATION OF FLOW BEGAN IN 1900. fKIBEHfS·--PERIODIC DATA: MAXIMUM 2B DEG. C, JULY 6, 1967 MINIMUM = 6 DEG. C, DEC. 30, 1965

WATER TEMPERATURES FROM PERIODIC. DATA, DEGREES CELSIUS PERIOD QLBE~QBQ Q~l ... ~Q~ ... QEC.a. JA!ll.a. ll.B..a. &a... AfB.a. ~AY JUl::lf JULY AUG .a. .Sf£... 1962-68 MAXIMUM: 1a 13 11 18 19 21 21 22 2a 26 2a MEAN: ** 16 10 10 14 17 17 24 22 23 26 2a MINIMUM: ** 12 6 9 ll 14 13 21 22 20 26 2a DAYS OF ll.ECORO: **0 4 2 2 3 2 5 4 1 4 1 1

USGS: 11-1680. LOS GATOS CREEK AT LOS GATOS, CALIF. O~o~R: E-6-5250

LQ~AllU~.--LAT 37 12 30, LONG 121 59 15, NE1/4 SEC. 29, T.a s, R.1 w, ON LEFT BANK 0.3 MILE DOWNSTREAM FROM TROUT CREEK, 0.5 MILE DOWNSTREAM FRO M LEXI NGTO N RESE RVOIR, AND 1.0 MILE SOUTH OF LOS GATOS, SANTA CLARA COUNTY. ALlllUQf_QE_GAGf.--420 FT ABOVE MEAN SEA LEVEL. QBAl~AGf_ABEA.--38.6 so. MI. BfCQBQS_A~AlLABLE·--304 PERIODIC OBSERVATIONS FROM FEBRUARY 1950 THROUGH SEPTEMBER 196B. NO CONTINUOUS RECORDS. A~EBAGf_Q15~dABGE·--47.5 CFS FOR 29 YEARS UF RECORD. BEMABKS.--SI GNIFICANT REGULATION OF FLOW BEGAN IN 1900. EKIBE~f5.--P E RIODIC DATA: MAXIMUM 25 OEG. C, AUG. 2, 1960 MINIMUM = 6 DEG. C, DEC. a, 1959

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD ULBE~UBQ U~l.a. ~a~ ... Qf~ ... JA~ ... Efll.o. MAR... Af&... MA:! JUl::lf JUL:! AUG .a. 5ff... 1950-&a MAXIMUM: 20 20 13 12 14 1a 19 24 20 22 25 22 MEAN: 17 14 ll 9 11 11 14 15 15 17 19 19 MINI·MUM: 11 9 6 7 7 7 9 a 11 12 13 9 DAYS OF RECORD: 21 27 26 28 23 33 29 29 24 21 18 25

USGS: ll-1690. GUADALUPE RIVER AT SAN JOSE, CALIF. owR: E-6-5150

LQ~Allu~.--LAT 37 20 O, LONG 121 54 O, SE1/4 SEC. 7, T.7 S, R.1 E, ON RIGHT oANK 100 FT DOWNSTREAM FROM LOS GATOS CREEK AT SAN JOSE, SANTA CLA RA COUNTY. ALlllUQf_QE_GAGf.--72 FT ABOVE MEAN SEA LEVEL. QBA1~AGf_A~fA.--146 SQ. MI. RfCQBQLA~UL.AB.LE·--119 PERIODIC OBSERVATIONS FROM FEBRUARY 1950 THROUGH AUGUST 1968. NO CO NTINUOUS REC ORDS. A~fBAGf_Ql5CtlABGE·-- BfHABK5·--SI GNIFICANT REGULATION OF FLOW BEGAN IN 1900. fKIBfMES·--PERIODIC DATA: MAXIMUM 29 OEG. C, JUNE a, 1962 MINIMUM = 7 DEG. C, FEB. 27, 1955

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QLBE.CUB.Q QCI.a. ~lJ~ ... QEC..a. JA~ ... EE!l... &B.a. AE. B.a. MAY J.U~ JULY A1J1i.a. .S.E£ ... 1950-611 MAXIMUM: 22 18 16 16 20 17 24 25 29 29 23 20 MEAN: 20 14 l3 12 l3 14 1a 19 22 25 22 20 MINIMUM: 17 12 10 7 7 12 14 16 17 23 20 19 01\YS OF RECORD: 2 5 10 13 34 26 13 4 4 3 3 2

16 GUADALUPE RIVER BASIN USGS: 11-1695. SARATOGA CREEK AT SARATOGA, CALIF. DwR: E-6-5100

LQ~AllQ~.--LAT 37 15 15, LONG 122 2 25, SEC. o, T.O , R.O IN QUITO GRANT, ON RIGHT BANK ON DOwNSTRFAM SIDE OF PRIVATE ROAD BRIDGE, 0.7 MILE DOWNSTREAM FROM DIVERSION DAM, AND 0.5 MILES SOUTHWEST OF SARATOGA, SANTA CLARA COUNTY. ALlllUU~_Qf_GAGf~--500 FT ABOVE MEAN SEA LEVEL. llBAl~AGf_ABfA·--9.22 SQ. MI. Rf~Q&QS_A~AllAUlf·--99 PERIODIC OBSERVATIONS FROM JANUARY 1950 THROUGH SEPTEMBER 1968. NO CONTINUOUS RECORDS. A~f&AGf_QlS~tlA&Gf.--9.68 CFS FOR 34 YEARS OF RECORD. BfMA&~S.--SIGNIFICANT REGULATION OF FLOW BEGAN IN 1900. fXl&f~fS.--PERIODIC DATA: MAXIMUM 27 DEG. C, JUNE 27, 1962 MINIMUM = 4 DEG. c, JAN. 11, 1963, DEC. 20, 1962

wATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD aL&E.~aau 1950-68 MAXIMUM: 17 14 13 13 12 17 22 22 27 18 26 20 MEAN: 14 12 10 8 10 10 13 15 18 17 21 17 MINIMUM: 11 8 4 4 7 8 9 11 12 15 14 11 DAYS OF RECORD: 3 8 10 12 10 15 12 8 9 5 4 3

COYOTE CREEK BASIN USGS: 11-1698. COYOTE CREEK NEAR GILROY, CALIF. DWR: E-6-4300

LQ~AllQ~.--LAT 37 4 40, LONG 121 29 36, NE1/4SE1/4 SEC.11, T.10 S, R.4 E, ON LEFT BANK 0.7 MILE DOWNSTREAM FROM BEAR CREEK, 5.0 MILES UPSTREAM FROM COYOTE CREEK DAM, AND 6.4 MILES NORTHEAST OF GILROY, SANTA CLARA COUNTY. AllllUQf_Qf_GAGf.--790 FT ABOVE MEAN SEA LEVEL. URAl~AGf_ABfA.--109 SQ. MI. Bf~QBQS_A~AlLAaLE.--78 PERIODIC OBSERVATIONS FROM JANUARY 1961 THROUGH AUGUST 1968. CONTINUOUS RECORD FROM OCTOBER 1964 THROUGH SEPTEMBER 1968. A~fRAGf_QlS~tiAB.Gf·--43.1 CFS FOR 7 YEARS OF RECORD. RfMAR~S.--REGULATION OF FLOW NOT SIGNIFICANT. RECORDS FURNISHED BY SANTA CLARA VALLEY WATER CONSERVATION DISTRICT. fXIREMfS.--CONTINUOUS DATA: MAXIMUM = 23 DEG. C, JULY 1, 1968 MINIMUM = 4 DEG. C, JAN. 2, 1966 Pt:RIODIC DATA: MAXIMUM 2B DEG. C, JULY 2, 1962 MINIMUM = 6 DEG. C, JAN. 22, 1962, FEB. 28, 1962

WATER TEMPERATURES FROM ONCE DAILY DATA, DEGREES CELSIUS

YEAR 1965 MAXIMUM: ** ** 14 1l 12 15 21 ** l7 ** ** ** MEAN: ** ** 11 9 12 13 13 ** 17 ** ** ** MINIMUM: ** ** 7 4 12 12 8 ** 17 ** ** ** 1966 MAXIMUM: ** 13 8 9 9 8 20 21 22 ** 22 ** MEAN: ** 11 7 7 9 8 18 21 22 ** 22 •• MINIMUM: ** 7 7 4 9 8 14 19 22 ** 22 ** 1967 MAXIMUM: ** 13 13 12 13 14 13 16 13 22 •• 21 MEAN: ** 12 11 9 11 11 11 16 13 22 ** 21 MINIMUM: ** 11 8 7 7 8 9 16 13 22 ** 21 1968 MAXIMUM: ** ** ** B 16 15 19 19 21 23 21 ** MEAN: ** ** ** 8 12 13 17 19 21 23 21 ** MINIMUM: ** ** ** 7 6 12 11 19 21 23 21 **

1965- MAXIMUM: ** 13 14 12 16 15 21 21 22 23 22 21 1968 MEAN: ** 12 10 B ll ll 15 19 18 23 22 21 MINIMUM: ** 7 7 4 6 8 8 16 13 22 21 21 DAYS OF RECORD: 0 7 32 43 25 25 42 4 4 3 2 1

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QLB.f~Q!!.Q

1961-68 MAXIMUM: ** 13 14 12 ll 16 22 22 24 28 23 21 MEAN: ** 11 11 8 9 13 15 19 19 23 22 21 MINIMUM: ** 7 7 6 6 8 8 16 13 21 21 20 DAYS OF RECORD: 0 3 9 16 6 10 9 6 7 6 3 3

17 COYOTE CREEK BASIN USGS: 11-1700. COYOTE CREEK NEAR MADRONE, CALIF. DWR: E-6-4250

LaklilQ~.--LAT 37 10 6, LONG 121 38 55, SEC. 0 0 T.O , R.O , NEAR SOUTHEAST CORNER OF LA LAGUNA SECA GRANT, ON RIGHT BANK 1.2 MILES DOWNSTREAM FROM ANDERSON DAM AND 1.8 MILES NORTHEAST OF MADRONE, SANTA CLARA COUNTY. ALlliUQf_Qf_G!GE·--375 FT ABOVE MEAN SEA LEVEL. UBA~AGE-ARfA·--196 SQ. MI. RECOaQS_&~AlLAaLE·--273 PERIOQJC OBSERVATIONS FROM FEBRUARY 1950 THROUGH SEPTEMBER 1968. NO CONTINUOUS RECORDS. An&AGLUlSI.I:i!&GE·--66.0 CFS FOR 61 YEARS OF RECORD. &f!A&!S·--SIGNIFICANT REGULATION OF FLOW BEGAN IN 1900. fl!Bf~fS.--PERIOOIC DATA: MAXIMUM 27 DEG. C, AUG. 5, 1964 MINIMUM = S DEG. C, DEC. 8, 1965

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD UL&ECOB.Il OI.L. !jlJ~& UEC.a JA~.a EE~ ~A&& AeR.a !AX. J1Jlif .wu AU1i.a Sff.a 1950-68 MAXIMUM: 21 17 14 13 14 14 18 20 23 24 21 24 MEAN: 15 14 12 10 11 12 13 14 14 17 16 11 MINIMUM: 11 10 5 6 6 9 8 10 12 11 11 10 DAYS OF RECORD: 20 22 18 26 28 24 27 30 18 24 15 21

USGS: 11-1115. COYOTE CREEK NEAR EDENVALE, CALIF. DWR: E-6-4150

LIJCAilQ~.--LAT 37 16 15, LONG 121 47 47, SEC. O, T.O • R.O ' AT EAST BOUNDARY OF SANTA TERESA GRANT, ON LEFT BANK AT THE NARROWS, 1.5 MILES NORTHEAST OF EDENVALE AND 1 MILES SOUTH OF SAN JOSE, SANTA CLARA COUNTY. ALlliUQf_Qf_GAGf.--190 FT ABOVE MEAN SEA LEVEL. URAI~AGE_A&EA·--229 SQ. MI. B.fCQB.DS-~AlLAaLE·--40 PERIODIC OBSERVATIONS FROM APRIL 1951 THROUGH MAY 1962. NO CONTINUOUS RECORDS. ~&Aiif_QlSCI:iARGE.-- ~A&~S.--SIGNIFICANT REGULATION OF FLOW BEGAN IN 1900. Ell&~fS.--PERIODIC DATA: MAXIMUM 24 DEG. c, JULY 31, 1958 MINIMUM = 6 DEG. C, FEB. 1, 1955

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD DLREC.URQ UCI.a ~~ UfC.a JA~& EE~ t!AR.a AeR.a Mx. .llJ!jf .wu AWU. Sff.a 1951-62 MAXIMUM: 14 13 10 8 11 16 18 23 19 24 22 22 MEAN: 13 12 10 8 9 14 15 18 18 20 21 17 MINIMUM: 11 12 10 8 6 13 13 13 17 14 18 10 DAYS OF RECORD: 4 3 1 1 4 2 6 6 2 3 5 3

USGS: 11-1121. UPPER PENITENCIA CREEK AT SAN JOSE, CALIF. DWR: E-6-9230 LlJCAllUH·--LAT 37 23 43, LONG 121 49 38, SEC. o, T.O , R.O , ON NORTH BOUNDARY OF SAN JOSE PALA GRANT, ON LEFT BANK AT DOWNSTREAM SIDE OF COUNTY ROAD BRIDGE, 0.1 MILE UPSTREAM FROM DUTARD CREEK, NEAR NORTHEAST LIMITS OF SAN JOSE, SANTA CLARA COUNTY. ALlliUQf_Qf_G!Gf.--265 FT ABOVE MEAN SEA LEVEL. DBAl~GE-A&fA.--21.5 SQ. MI. aECIJ&QS_!~AlLAaLE·--53 PERIODIC OBSERVATIONS FROM JANUARY 1961 THROUGH SEPTEMBER 1968. NO CONTINUOUS RECORDS. An&&Gf_QlSCI:i!B.GE.--4.59 CFS FOR 6 YEARS OF RECORD. Rf~A&KS.--SIGNIFICANT REGULATION OF . FLOW BEGAN IN 1900. RECORDS FURNISHED BY SANTA CLARA VALLEY WATER CONSERVATION DISTRICT. f!l&f~fS.--PERIODIC DATA: MAXIMUM 24 DEG. C, JULY 31, 1963 MINIMUM = 3 DEG. c, JAN. 11, 1963

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD UL&EI.ORil Dr.L. H~.a UfC.a J.AL ffll.a ~.& Af&.a ~:t .llJ!jf .llJU AWU. Sff.a {961-68 MAXIMUM: 15 16 14 14 12 14 l't lit 16 24 18 21 MEAN: 15 13 10 1 10 11 12 13 15 22 18 18 MINIMUM: 15 1 6 3 1 8 9 11 13 18 18 11 DAYS OF RECORD: 1 5 5 9 5 5 5 5 4 5 1 3

18 COYOTE CREEK BASIN USGS: 11-1722.2 ARROYO DE LOS COCHES NEAR MILPITAS, CALIF. DWR: E-6-4050

LO,AllQ~.--LAT 37 26 38, LONG 121 51 45, NWl/4 SEC. 4, T.6 S, R.1 E, 200 FT ABOVE CALAVERAS ROAD BRIDGE, 2.6 MILES NORTHEAST OF MILPITAS, SANTA CLARA COUNTY. ALlliUQf_Qf_~A~f.--320 FT ABOVE MEAN SEA LEVEL. ORAl~A~E-ARfA.-- Rf~QROS_A~AlLAaLf.--20 PERIODIC OBS£RVATIONS FROM SEPTEMBER 1959 THROUGH FEBRUARY 1962. NO CONTINUOUS RECORDS. A~ERA~E-OlSCtiAR~f.-- REHARKS·--REGULATION OF FLOW NOT SIGNIFICANT. RECORDS FURNISHED BY CALIFORNIA DEPARTMENT OF WATER RESOURCES. f!IREHfS.--PERIODIC DATA: MAXIMUM 21 DEG. C, JUNE 27, 1961 MINIMUM = .6 DEG~ C, DEC. 31, 1959

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QLRECQRO Q'L. ~a~ ... Ofk JAI':i.a. f.ER.a. MR... A£&... .IW: JUtif JUll .AUG.a ~f.a 1959-62 MAXIMUM: 16 15 9 11 14 16 13 14 21 16 •• 16 MEAN: 16 15 8 11 12 16 12 14 19 16 ** 16 MINIMUM: 16 15 6 11 9 16 11 13 18 16 ** 16 DAYS OF RECORD: 1 1 3 1 2 1 3 3 3 1 0 1

ALAMEDA CREEK BASIN USGS: 11-1740. SAN ANTONIO CREEK NEAR SUNOL, CALIF. DWR: E-5-1650

LO~llOI':i·--LAT 37 34 39, LONG 121 51 24, SEC. o, T.O , R.O IN VALLE DE SAN JOSE GRANT, ON RIGHT BANK 0.4 MILE UPSTREAM FROM CALAVERAS ROAD BRIDGE, 0.85 MILE ABOVE MOUTH, AND 2 MILES SOUTHEAST OF SUNOL, ALAMEDA COUNTY. ALlllUOf_Qf_~A~f.--272 FT ABOVE MEAN SEA LEVEL. ORA~A~E-ARfA.--37.0 SQ. MI. Rf,ORQS_A~AlLAaLE·--40 PERIODIC OBSERVATIONS FROM MARCH 1960 THROUGH MARCH 1965. NO CONTINUOUS RECORDS. ~RA~E-OlS~tiARGf.--9.56 CFS FOR 23 YEARS OF RECORD. REHARKS.--SIGNIFICANT REGULATION OF FLOW BEGAN FEBRUARY 1965. E!IREHfS.--PERIOOIC DATA: MAXIMUM 29 OEG. C, SEP. 3, 1963 MINIMUM = 6 OEG. C1 MAR. 25, 1960

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QLRE~QRQ Q~l.a t:iOll.a. Qfk JAth. Efn... MR... AfR.a. .IW: JUtif JUU AUG& llf.a 1960-65 MAXIMUM: 13 14 12 13 21 26 21 23 23 19 29 MEAN: 13 14 10 11 12 16 18 18 21 19 22 MINIMUM: 13 14 1 9 6 6 14 13 18 19 16 DAYS OF RECORD: 1 2 2 4 B 5 8 2 3 1 2

USGS: 11-1760. ARROYO MOCHO NEAR LIVERMORE, CALIF. DWR: E-5-1450

LO~AllQt:f.--LAT 37 37 35, LONG 121 42 13, NW1/4SE1/4 SEC.36, T.3 So R.2 Eo ON RIGHT BANK 100 FT DOWNSTREAM FROM MINES ROAD BRIDGE, 2.4 MILES UPSTREAM FROM UNNAMED TRIBUTARY, AND 5.2 MILES SOUTHEAST OF LIVERMORE, ALAMEDA COUNTY • .ALlliUOf_Qf_~AGf.--746 FT ABOVE MEAN SEA LEVEL. ORAl~AGf_ARfA.--38.2 SQ. MI. RE~ORQS_AllAlLAaLf.--39 PERIODIC OBSERVATIONS FROM FEBRUARY 1960 THROUGH JUNE 1968. NO CONTINUOUS RECORDS • .A~RAGf_OlS~tiARGE·--4.12 CFS FOR 22 YEARS OF RECORD. BEHA&KS.--REGULATION OF FLOW NOT SIGNIFICANT. E!IREHES.--PERIODIC DATA: MAXIMUM 29 DEG. C, AUG. 1 1 1967 MINIMUM = 7 OEG. c, DEC. 30 1 1965

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD Qf_Rft;.QRD Q~I ... t:iOll.a. Ofk JAti.a. f.ER.a H.AR.a. Aea... HAY J!Wf JW.Y AUG& ife.a 1960-68 MAXIMUM: 22 19 15 10 15 13 18 21 20 21 29 ** MEAN: 21 19 12 8 11 11 14 18 18 21 26 ** MINIMUM: 19 18 1 7 8 9 9 16 16 21 23 ** DAYS OF RECORD: 2 2 5 5 6 2 5 4 5 1 2 0

19 ALAMEDA CREEK BASIN USGS: 11-1762. ARROYO MOCHO NEAR PLEASANTON, CALIF. DwR: E-5-1410

LQCAllQ~.--LAT 37 41 19, LONG 121 52 41, SEC. o, T.O , R.O IN SANTA RITA GRANT, ON LEFT BANK 320 FT DOWNSTREAM FROM SANTA RITA ROAD, 0.7 MILE UPSTREAM FROM TASSAJARA CREEK, AND 1.B MILES NORTH OF PLEASANTON, ALAMEDA COUNTY. ALlllUQf_OE-~AGf.--329 FT ABOVE MEAN SEA LEVEL. QRAl~AGE_AREA·--143 SQ. MI. RECQRQ~-A~AlLA!iLf..-- 3 5 PERIODIC OBSERVATIONS FROM NOVEMBER 1962 THROUGH SEPTEMBER 196B. NO CONTINUOUS RECORDS. A~ERA~E-Ul~CtlARGE.-- RE~AR~S.--SI G NIFICANT REGULATION OF FLOW BEGAN IN 1900. EXrRE~f.S.--PERIDDIC DATA: MAXIMUM 32 DEG. C, AUG. 2, 1966 MINIMUM = 6 DEG. C, DEC. 20, 1963

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIO D QLRE.CQB.Q ocr... t:i.Oll..a. QEC.a. J!t':l .. EE.!ia. !5AR.a. AfRa. ~AY JU!::IE JULY AUG .a. SEe ... 1963-68 MAXIMUM: IB 12 11 ** 14 ll 21 16 27 24 32 20 MI:AN: 17 10 8 ** 12 ll 17 14 18 21 24 19 MINIMUM: 16 9 ** 10. 12 13 16 19 20. 18 DAYS OF REC ORD: 2 3 4 0 3 3 2 5 3 4 4

USGS: 11-1764. ARROYO VALLE ABOVE LANG CANYON, NEAR LIVERMORE, CALIF. DWR: E-5-1425 ARROYO VALLE ABOVE LANG CANYON.

LQ~AllQ~.--LAT 37 13 O, LO NG 121 39 57, SE1/4 SEC. 29, T.4 N, R.3 E, ON LEFT BAN K 700 FT UPST RE AM FRO M UNNAM ED TRIBUTARY, 1,200 FT UPSTREAM FROM LA NG CANYO N, AND 10.5 MILES SOUTHEAST OF LIVERMORE, ALA MEDA COUNTY. ALrliUQf._O[_G!GE..--800 FT ~ BO VE MEAN SEA LEVEL. QRAlt:i.A~E-ABEA·--12 6 SQ. MI. RECQBQS_A~AlLA!iL E ·-- 3 9 PERI OD IC OBSERVATIO NS FROM NOVEMBER 1963 THROUGH JUNE 1968. NO CONTI NUOUS RECORDS . AllERAGLUlSCtlABGE.-- RE~AR~S·--RE G ULA T I O N OF FLOW NO T SIGNIFICA NT. EXIBE~ES·--P E RIODIC DATA: MAXIMUM 28 D'O G. C, AUG. 30 , 1967 MI NIMUM = 7 OEG . C, JA N. 21, 1964, JAN. 23, 1964, NOV. 18, 1964

wATI: R TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD llLBECUBQ ocr... t:i.O~ ... UEC.a. JAt:i..a. EEll.a. !:lAS. .a. AfBa. MAY JU!::IE JULY AUG .a. i.E~ 1964-68 MAXIMUM: ** 16 12 9 9 16 20 21 26 ** 28 ** MEAN: ** 11 10 8 9 13 14 20 22 ** 27 ** MINIMUM: ** 7 8 7 9 12 9 18 16 ** 26 ** DAYS OF RECORD: 0 4 5 6 2 4 7 5 0 2 0

20 ~LAMEDA CREEK RASIN USGS: 11-1765. ARROYO VALLE NEAR LIVERMORE, CALIF. OwR: E-5-1400

LQ~AllQ~.--LAT 37 37 24, LONG 121 45 28, SEC. o, T.O , R.O IN VALLE DE SAN JOSE GRANT, ON RIGHT BANK 900 FT DOWNSTREAM FROM HIGHWAY R~IOGE, 1.1 MILES UPSTREAM FROM DRY CREEK, 4.1 MILES SOUTH OF LIVERMORE, AND 6.9 MILES SOUTHEAST OF PLEASANTON, ALAMEDA COUNTY. ALlllUQf_QE_~A~E.--5!0 FT ARUVE MEAN SEA LEVEL. QBAl~A~f-ABEA---147 sw. MI. Bf~QBQi_A~AllAaLE.--178 PERIODIC OBSERVATIONS FROM JANUARY 1952 THROUGH MAY 1968. CONTINUOUS RECORD FROM OCTOBER 1959 THROUGH SEPTEMBER 1968. A~fBAGE_QlS~UAgGE.--30.6 CFS FOR 28 YEARS OF RECORD. BfMAB~S.--REGULATION OF FLOW NOT SIGNIFICANT. fXIBfMfS.--CDNTINUOUS DATA: MAXIMUM = 32 flEG. C, JULY 21, 1960 MINIMUM = 4 DF.G. C, JAN. 2, 1966, DEC. 28, 1966, DEC. 14, 1967 PERIODIC DATA: MAXIMUM ?9 DEG. C, JULY 24, 1958 MINIMUM = 6 DEG. C, FEB. 27, 1962, JAN. 22, 1964, FEI3. 9, 1966

WATER TEMPERATURES FROM ONCE DAILY DATA, DEGREES CELSIUS

HAB 1960 MAXIMUM: ** ** 14 14 20 21 23 31 32 23 ** MEAN: ** ** 10 12 17 19 18 26 27 23 ** MINIMUM: ** ** 7 8 14 14 16 22 21 23 ** 1961 MAXIMUM: ** 10 13 l3 17 17 21 17 24 26 27 ** MEAN: ** 10 12 ll 14 15 18 15 !9 23 22 ** MINIMUM: ** 10 9 9 12 13 15 13 14 20 21 ** 1963 MAXIMUM: ** ** ** ** ** ** ** ** ** ** ** ** MEAN: ** ** ** ** ** ** ** ** ** ** ** ** MINIMUM: ** ** ** ** ** ** ** ** ** ** ** **

1960- MAXIMUM: ** 10 13 14 17 20 21 23 31 32 27 ** 1963 MEAN: ** lO 12 11 13 16 19 17 23 25 23 ** MINIMUM: ** lO 9 7 8 13 14 13 14 20 21 ** DAYS OF RECORD: 0 I 5 40 56 56 60 58 59 60 28 0

WATER TEMPERATURES FROM THERMOGRAPH DATA, DEGREES CELSIUS

Y:EAB lY64 MAXIMUM: 26 17 12 !3 13 18 24 26 30 30 27 ** MEAN: 17 13 9 9 10 13 17 19 21 23 22 ** MINIMUM: 12 9 6 7 7 8 11 13 14 16 17 ** 1965 MAXIMUM: ** ** 12 14 17 72 24 27 28 29 ** MEAN: ** ** 9 11 13 14 18 19 22 22 ** MINIMUM: ** ** 7 9 8 12 15 15 16 ** 1966 MAXIMUM: ** ll 11 ll 12 19 22 26 3l 29 ** ** MEAN: ** 9 7 8 8 12 16 !9 21 22 ** ** MINIMUM: ** 8 5 4 11 !3 14 17 ** ** 1967 MAXIMUM: 17 17 13 12 14 !7 18 26 28 29 29 ?6 MEAN: !4 13 9 9 10 12 12 17 20 23 23 22 MINIMUM: 12 9 4 7 7 8 13 17 17 18 1968 MAXIMUM: 21 11 12 12 17 21 24 26 24 ** ** ** MEAN: 18 11 9 8 12 14 16 18 20 ** ** ** MINIMUM: 16 !1 4 5 7 10 11 13 16 ** ** **

1964- MAXIMUM: 26 17 13 !3 17 21 24 26 31 30 29 26 1968 MEAN: 16 12 8 9 10 13 15 18 20 23 22 22 MINIMUM: !2 8 4 4 5 6 8 9 13 15 16 18 0"'YS OF RECORD: 48 60 120 155 142 153 150 155 12! 115 61 25

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS

PERIOD OLBf~QBQ

1952-68 MAXIMUM: !9 !4 14 18 14 18 21 24 24 29 28 22 MEAN: 18 11 11 9 11 12 16 18 19 21 23 18 MINIMUM: 17 9 7 6 6 7 7 14 15 17 19 13 DAYS OF RECORD: 3 3 19 27 21 20 22 20 15 17 7 4

21 ALAMEDA CREEK BASIN USGS: 11-1766. ARROYO VALLE AT PLEASANTON, 'CALIF. OWR: E-5-1350

LDt&IlD~.--LAT 37 40 2, LONG 121 53 2. sec. o, T.O , R.O IN VALLE OE SAN JOSE GRANT, ON RIGHT BANK 0.4 MILE NORTHWEST OF PLEASANTON AND 5.8 MILES WEST OF LIVERMORE, ALAMEDA COUNTY. ALlllUUE_Qf_~A~E.--312 FT ABOVE MEAN SEA LEVEL. Jl&&aA!if_A&f!.--111 SQ. MI. &ftO&QS_!~!lL&aLE·--33 PE~IODIC OBSERVATIONS FROM JANUARY 1953 THROUGH APRIL 196B. NO CONTINUOUS RECORDS: !~f&!~E-UlSttlA&GE·--30.2 CFS FOR 10 YEARS OF RECORD. &fHA&KS.--REGULATION ,OF FLOW NOT SIGNIFICANT. fXI&fHES·--PERIODIC, DATA: MAXIMUM 20 DEG. c, MAY z, 1963, OCT. 9, 1967 MINIMUM = 6 DEG. C, APR. 9, 1958

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QL&f.CQ&D uc.r ... t:iQ~ ... DEC. ... J.!t:iL EEa... ts&& ... Ae& ... !SA:! J.U.!jf J.UU. AUG& Sf£... 1953-68 MAXIMUM: 20 ** 13 12 13 14 18 20 16 ** •• •• MEAN: 20 •• 13 9 10 13 14 17 16 •• •• •• MINIMUM: 20 •• 13 1 7 11 6 13 16 •• •• DAYS OF RECORD: 1 0 1 6 9 5 7 3 1 ••0 0 0

USGS: 11-1769. ARROYO DE LA LAGUNA AT VERONA, CALIF. DWR: E-5-1310 ARROYO DE LA LAGUNA VERONA BRIDGE NEAR PLEASANTON. LatAilQt:i.--LAT 37 37 36, LONG 121 52 54, SEC. o, T.o R.O AT BRIDGE, ON STATE HIGHWAY 21, 2.1 MILES SOUTH OF PLEASANTON ' AND 8 MILES NORTHEAST OF NlLES, ALAMEDA COUNTY. ALlliUQf._Qf_~Aiif·--280 FT ABOVE MEAN SEA LEVEL. U&A~A~E-A&f.A·-- &ftQ&QS_!~AlL!aLE·--16 PERIODIC OBSERVATIONS FROM OCTOBER 1951 THROUGH JUNE 1957• CONTINUOUS RECORD FROM OCTOBER 1958 THROUGH SEPTEMBER 1963. A~f&AGf_DlSttlA&Gf..-- BfH!B,KS..--REGULATION OF FLOW NOT SIGNIFICANT. Ul&Etsf.S.--CONTINUOUS DATA: MAXIMUM = 27 DEG. c, AUG. 6, 1960 MINIMUM = 3 DEG. c. JAN. 12, 1963, JAN. 13, 1963, JAN. 17' 1963 PERIODIC DATA: MAXIMUM 19 DEG. c, JULY 30, 1956 MINIMUM = 1 DEG. c, JAN. 9, 1952

WATER TEMPERATURES FROM ONCE , DAILY DATA, DEGREES CELSIUS

ru& ~ ... !jQ~ Oft... J.At:i ... Ef.fi& t1A&& Af&& tsU J.ll.!jf Jl.IJ.l AUG& Sff ... 1959 MAXIMUM: •• ** •• •• •• •• •• •• ** 26 24 24 MEAN: •• •• •• •• •• •• •• •• •• 22 21 19 MINIMUM: •• •• •• •• •• •• •• •• •• 19 18 16 1960 MAXIMUM: 19 13 13 11 12 17 18 18 ** 26 27 23 MEAN: 18 11 11 , 9 10 14 14 14 •• 22 22 20 MINIMUM: 16 10 7 , 1 8 9 9 12 ** 21 19 18 1961 MAXIMUM: •• 16 13 14 14 17 22 21 18 •• 23 22 MEAN: •• 13 9 8 12 13 16 16 16 •• 21 20 MINIMUM: .•. 9 1 3 9 9 10 13 14 •• 16 18 1962 MAXIMUM: •• 13 13 16 12 17 19 18 23 23 22 19 MEAN: •• 13 9 8 9 11 16 15 19 20 19 18 MINIMUM: •• 12 5 4 4 8 13 13 15 18 17 15 1963 MAXIMUM: 19 16 14 13 14 14 16 20 24 •• •• •• MEAN: 16 13 9 6 13 12 - 13 l7 19 •• •• •• MINIMUM: 13 8 3 3 11 7 11 11 16 •• •• ••

1959- MAXIMUM: 19 16 14 16 14 17 22 21 24 26 21 24 1963 MEAN: 17 13 10 8 11 13 15 16 18 21 21 19 MINIMUM: 13 8 3 3 4 1 9 11 14 18 16 15 DAYS OF RECORD: 37 44 102 107 109 121 109 115 63 53 105 57

WATER ' TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD UL&EC..OBD Qtl... t:i!J~ Df~ J.A~ ... Ef.fi& !!!&... Af&.a. !SA:t Jl.ltif J..UU &Wi& .S.Ef ... 1952-57 MAXIMUM: 14 •• •• 9 10 12 18 11 18 19 19 18 MEAN: 14 •• •• B 10 12 18 14 18 19 18 18 MINIMUM: 14 •• •• 1 10 12 18 ' 11 17 19 17 18 DAYS OF RECORD: 2 0 0 3 1 1 1 2 2 l 2 l

22 ALAMEDA CREEK BASIN

USGS: 11-1790. ALAMEDA CREEK NEAR NILES, CALIF. OWR: E-5-1150

LCklllQ~.--LAT 37 35 14, LONG 121 57 35, NW1/4 SEC. 15, T.4 St R.l w, ON RIGHT BANK 0.3 MILE DOWNSTREAM FROM RAILROAD BRIDGE AND 1.2 MILES NORTHEAST OF NILES, ALAMEDA COUNTY. ALlllUQf_QE_~A~E.--86 FT ABOVE MEAN SEA LEVEL. D&&l«AGf_ARfA.--633 SQ. MI. &EkORQS_&~AlLAaLE·--351 PERIODIC OBSERVATIONS FROM FEBRUARY 1950 THROUGH SEPTEMBER 1968. CONTINUOUS RECORD FROM OCTOBER 1955 THROUGH SEPTEMBER 1968. A~BAGE-DlSkHA&GE.--121 CFS FOR 76 YEARS OF RECORD. RE!AR~S.--SIGNIFICANT REGULATION OF FLOW BEGAN IN 1916. EII&E!fS·--CONTINUOUS DATA: MAXIMUM · = 31 DEG. Ct JUNE 1t 1960 MINIMUM = 0 DEG. C, JAN. 6, 1961 9 JAN. 7t 1961 PERIODIC DATA: MAXIMUM 27 DEG. Ct SEP. 2t 1965 MINIMUM = 4 DEG. Ct JAN. 15, 1962, JAN. 31t 1963

WATER TEMPERATURES FROM ONCE DAILY DATA, DEGREES CELSIUS

1956 MAXIMUM: •• •• •• •• •• •• •• •• •• 23 24 23 MEAN: •• •• •• •• •• •• •• •• •• 20 20 19 MINIMUM: •• •• •• •• •• •• •• •• •• 18 15 16 1957 MAXIMUM: 19 17 13 11 16 18 19 21 29 •• •• ** MEAN: 15 12 8 1 12 14 16 18 22 •• •• ** MINIMUM: 11 1 3 3 7 11 11 15 17 •• ** ** 1958 MAXIMUM: •• 14 16 13 16 13 17 20 22 21 26 23 MEAN: •• 13 11 9 13 11 13 17 20 21 26 23 MINIMUM: •• 12 8 4 9 8 9 14 17 20 26 23 1959 MAXIMUM: 18 9 11 14 12 17 19 22 23 •• •• 23 MEAN: 17 9 9 11 10 lit 19 21 23 •• •• 22 MINIMUM: 16 9 8 8 8 13 18 21 23 •• •• 17 1960 MAXIMUM: 23 17 12 12 13 19 23 26 31 •• 27 23 MEAN: 19 15 9 8 11 16 19 21 26 •• 25 21 MINIMUM: 16 9 1 4 9 11 15 16 22 •• 22 18 1961 MAXIMUM: 21 15 14 13 14 .18 23 22 24 •• •• •• MEAN: 18 12 8 7 13 15 19 20 22 •• ** •• MINIMUM: 16 9 5 0 12 13 lit 17 19 •• •• •• 1962 MAXIMUM: •• •• •• 10 13 15 21 21 23 23 24 24 MEAN: ** •• •• 1 11 12 19 20 21 22 22 19 MINIMUM: •• •• •• It 7 9 16 18 18 21 19 14 1963 MAXIMUM: 21 16 14 9 16 16 17 22 23 25 24 24 MEAN: 17 14 11 6 lit 14 14 18 22 22 22 21 MINIMUM: 13 9 5 3 12 11 11 16 16 18 18 18 l961t MAXIMUM: 21 16 10 11 12 18 19 22 25 24 24 21 MEAN: 17 13 7 7 9 13 17 18 21 22 21 18 MINIMUM: 10 8 4 5 1 9 14 13 15 21 11 16 1965 MAXIMUM: 19 15 15 12 13 17 20 21 21 24 24 22 MEAN: 16 11 11 9 11 13 14 18 18 22 23 19 MINIMUM: 14 7 7 1 8 11 9 14 16 17 20 15

1966 MAXIMUM: 18 16 11 10 13 20 24 24 24 26 24 Zit MEAN: 17 lit 9 8 9 13 19 21 22 23 23 22 MINIMUM: 12 10 5 1 7 9 16 18 18 20 21 19 1967 MAXIMUM: 24 16 12 10 13 13 16 25 24 27 Zit 22 MEAN: 18 13 9 8 10 10 10 17 19 23 22 21 MINIMUM: 14 9 6 6 10 10 10 10 15 20 20 20

19611 MAXIMUM: 22 18 10 9 18 16 18 19 24 23 25 25 MEAN: 18 15 1 8 10 12 16 17 20 23 22 22 MINIMUM: 17 10 4 7 1 10 14 15 15 23 18 19

1956- 1968 MAXIMUM: 24 18 16 14 18 20 24 26 31 27 27 25 MEAN: 11 13 9 8 11 13 16 19 21 22 23 21 MINIMUM: 10 1 3 0 1 8 9 10 15 17 15 14 DAYS OF RECORD: 218 231 259 297 .306 321t 309 303 260 183 209 242

23 ALAMEDA CREEK BASIN USGS: 11-1790.--Continued

WATER TEMPEiATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD ULB.ECCIB.Q 1950-68 MAXIMUM: 21 16 15 16 16 17 22 23 26 23 21 27 MEAN: 17 12 9 11 12 17 18 21 21 22 20 MINIMUM: 12 8 6 4 6 6 12 14 16 16 19 ll DAYS OF RECORD: 24 27 30 35 46 38 31 2B 21 21 22 22

USGS: 11-1805. DRY CREEK AT UNION CITY, CALIF. DWR: E-5-1076

LQ~~llQ~.--LAT 37 36 27, LONG 122 1 22, SEC. O, T.O , R.O IN AR~UYO nE LA ALAMEDA GqANT, ON RIGHT RANK 900 FT DOWNSTREAM FROM BRIDGE ON STATE HIGHWAY 9 IN DECOTO DISTRICT IN UNION CITY AND 1.7 MILES UPSTREAM FROM MOUTH, ALAMEDA COUNTY. ALlliUUE_QE_~A~E.--85 FT ABOVE MEAN SEA LEVEL. QBAI~A~E ~ AB.EA.--9.41 SQ. MI. B.ECQBQS_A~AllA~LE·--33 PERIO DIC OBSERVATIONS FROM FEBRUARY 1960 THROUGH MARCH 1968. NO CONTINUOUS RECORDS. AYEB.AGE_QlSCtlAB.GE.--1.40 CFS FOR 11 YEARS OF RECORD. B.fMAB.~S.--REGULATION OF FLOW NUT SIGNIFICANT. f~IB.EM£S.--PERIODIC DATA: MAKIMUM 22 DEG. C, JULY 1, 1963 MINIMUM = 5 DEG. C, FEB. 23, 1960

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD i.lLB.ECIJBU 1960-68 MAXIMUM: 14 12 9 13 13 14 17 18 ** 22 ** ** MEAN: 14 12 9 9 10 11 l3 16 ** 22 ** ** MINIMUM: 14 12 8 1 5 10 l3 ** 22 ** ** DAYS OF RECORD: 1 1 2 10 4 3 0 1 0 0

USGS: 11-1807. PATTERSON CREEK AT UNION CITY, CALIF. DWR: E-5-2100

LQCAllU~.--LAT 37 35 9, LONG 122 2 50, SEC. o, T.O , R.O , IN PORTERO DE LOS CERRITOS GRANT, ON RIGHT BANK 0.2 MILE UPSTREAM FROM BRIDGE ON STATE HIGHWAY 17, 0.1 MILE BELOW EFFLUENCE, AND 2.0 MILES SOUTHWEST OF DECOTO DISTRICT IN UNION CITY, ALAMEDA COUNTY. ALillUQE_QE_GAGE.--4 FT ABOVE MEAN SEA LEVEL. URAl~AGE_AB.EA·-- B.ECQ&QS_A~AlLAfiLE·~-28 PERIODIC OBSERVATIONS FROM FEBRUARY 1960 THROUGH JUNE 1968. NO CONTINUOUS RECORDS. AYtB.AGE_QlSC~AB.GE.--42.0 CFS FOR 9 YEARS OF RECORD. BE~AB~S.--RE G ULATION OF FLOW NOT SIGNIFICANT. PRIOR TU OCTOBER 26, 1966, AT SITE 0.2 MILE DOWNSTREAM. EII&EMES.--P E ~IOOIC DATA: MAXIMUM 30 OEG. C, JUNE 3, 1968 MINIMUM = 6 DEG. C, FEB. 28, 1962

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS

PER 100 UL8.E.C.!:I3.12 1960-68 MI\XIMUM: 12 ** 16 9 14 ** 16 23 30 ** ** ** MEAN: 12 ** 12 8 9 ** 14 21 30 •• ** ** MINIMUM: 12 ** 8 7 6 ** 13 19 30 ** •• ** DAYS OF RECORD: 1 0 5 6 1 0 5 3 1 0 0 0

24 ALAMEDA CREEK BASIN USGS: 11-1807.5 ALAMEDA CREEK AT UNION CITY, CALIF. Dr/R: E-5-1050

LQ~AllQt:I.--LAT 37 ~5 46, LON G 122 3 15, SEC. O, T.O , R.O IN ARROYO OE LA ALAMEDA GR ANT , ON LEFT BA NK 5 FT DOWNSTREAM FROM BRIDGE ON HAKER KO AO, 1 MILE DOW NSTREAM FROM DRY CREEK, AND 1.4 MILES EAST OF ALVA RA DO DISTRICT I N UNI ON CITY, ALAMEDA COUNTY. ALiliUUf_QE_~A~f.-­ ORAlt:I~Gf_A~E~·--65 3 SQ. MI. Bf~QROS_A~AlLAtlLf.--16 PERI OD IC OBSFKVATIO NS FROM MARCH 1962 THROUGH SEPTEMHER 1968. NO CONTINUOUS RECORDS. A~EBAGE_QlS~~~&Gf..--1.91 CFS FOR 9 YEARS OF RECORD. 8EMA8KS.--SI GN IFICA NT REG UL ATIO N OF FLOW BEG AN OCTOBER 1966. EHBf.Mf.S..--PcRIOOIC DATA: MAXIMUM 71 DEG. C, JULY 31, 1967 MI 'I IMUM = 7 D~G . C, JAN. 1, 1966

WATER TEMPE iUTURES FROM PERIODIC DATA, DEGREES CELSIUS PERIO D ULBE~ QB O Q~I ... tiQil ... DE~ ... J.Ati ... Effi._ MAB ... AfRa. MAY ~E JULY AUG .a. S.Ef.a. 1962-66 MAXIMUM: 16 ** 9 7 ** 11 22 ** ** ** ** ** MEAN: 16 ** 9 7 ** 10 22 ** ** ** ** ** MINIMUM: 16 ** 7 ** 9 22 ** ** ** ** ** DAYS OF RECDKD: 1 0 1 0 2 1 0 0 0 0 0 1967-68 MAXIMUM: 16 14 12 ll ** ** ** 14 22 23 20 20 MEAN: 16 14 12 ll ** ** ** 14 22 23 20 20 MINIMUM: 16 14 12 10 ** ** ** 14 22 23 20 20 DAYS OF RECORD: 1 1 1 2 0 0 0 1 1 1 1 1

SAN LORENZO RIVER BASIN USGS: 11-1810. SAN LORENZO CREEK AT HAYWARD, CALIF. DWR: E-4-1100

LQ~AllQt:~.--LAT 37 41 11, LON G 122 3 44, SEC. O, T.O , R.O , IN SAN LO REN ZO GRANT, 0~ RIGHT BANK AT BRIDGE ON B STREET, JUST OUTSIDE CITY LIMITS OF HAYWARD AND 0.5 MILE DOWNSTREAM FROM CROW CREEK, ALAMEDA COUNTY. AL!llUUf_Qf_GAGf..--133 FT ABOVE MEAN SEA LEVEL. URAltiAGf._ABf.A·--37.5 SQ. MI. Bf~QRUS_AilAlLA!iLf..--110 PERIODIC OBSERVATIONS FROM JANUARY 1950 THROUGH JULY 1967. NO CONTINUOUS RECORDS. AllfBAGf_UlS~~ABGf.--14.3 CFS FOR 22 YEARS OF RECORD. BEMABKS.·--SIGNIFICANT REGULATION OF FLOW BEGAN OCTOBER 1962. f.X!Bf.Mf.S..--PERIODIC DATA: MAXIMUM 26 DEG. C, AUG. 14, 1964 MINIMUM ~ 2 DEG. C, JAN. 23, 1962

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QLBE~UBU Q~I ... t:IQil ... OE.r. ... J.At:l. ... Ef.lia. MAR... AfRa. .MAY .IU!:l.E. JULY AU!U. S..E.f£ 1950-62 MAXIMUM: 15 11 14 12 13 18 17 22 19 21 ** 16 MEAN: 12 8 10 7 10 11 14 16 18 18 ** 15 MINIMUM: 1 8 2 8 7 11 12 17 16 ** 14 DAYS OF RECORD: 4 3 9 7 10 6 6 3 2 0 2

1963-67 MAXIMUM: 18 14 11 9 9 13 14 20 19 23 26 18 MEAN: 16 11 9 6 8 10 13 14 15 19 21 18 MINIMUM: 12 8 4 4 7 8 12 11 13 17 17 18 DAYS OF RECORD: 6 7 7 5 4 4 4 5 5 5 2 2

25 SAN LORENZO RIVER BASIN USGS: 11-1810.4 SAN LORENZO CREEK AT SAN LORENZO, CALIF. DWR:

LDC.AllQ~.--LAT 37 41 3, LONG 122 8 20, SEC. o, T.O , R.O I~ SAN LORENZO ISOTOI GRANTi ON LEFT BANK 400 FT DOWNSTREAM FROM WASHINGTON AVENUE BRIDGE IN SAN LORENZO, AND 1.6 MILES UPSTREAM FROM. MOUTH, ALAMEDA COUNTY. ALlllUQf_Qf_~AGf.--6 FT ABOVE MEAN SEA LEVEL. O&Al~AGE_A!if~.--44.6 SQ. MI. RfC.U&Qi_A~AlLARLf.-- 8 PERIODIC OBSERVATIONS FROM OCTOBER 1967 THROUGH SEPTEMBER 1968. NO CONTINUOUS RECORDS. A~EBAGf_Oli~tiABGf.-- Rf~AR~S·--si G NIFICANT REGULATION OF FLOW BEGAN OCTOBER 1962. EXIBEMES.--PERIODIC DATA: MAXIMUM 26 DEG. C, SEP. 5, 1968 MINIMUM = 15 DEG. C, OCT. 24, 1967

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD UL&E.C.Q8.Q QC.I ... tiU~ ... Of. C. ... J.At:i.a. fER ... ~A& .a. Af&... MAY J.Utlf J.l.U.Y AUG .a. iff... 1968 M AXIMO~: 21 18 ** ** •• •• •• 23 25 •• 23 26 Mt: AN: 19 18 ** •• •• •• •• 23 25 •• 23 26 MII\IIMUM: 15 18 •• •• •• •• 23 25 23 26 DAYS OF RECORD: 3 1 0 0 0 ••0 0 1 1 ••0 1 1

CASTRO CREEK BASIN USGS: ll-1814. WILDCAT CREEK AT RICHMOND, CALIF. DWR: E-4-2050 LQC.AllUti·--LAT 37 57 41, LONG 122 21 33, SEC. o, T.O , R.O IN SAN PA BLO GRA NT, ON LEFT BANK 200 FT DOWNSTREAM FROM SOUTHERN PACIFIC R~ILWAY BKIDGE AT EAST CITY LIMITS OF RICHMOND AND 2 MILES UPSTREAM FRO iol MII UTH, CONTRA COSTA COUNTY. ALlllUQf_Qf_G~~f.--21 FT ABOVE MEAN SEA LEVEL. Q8.Alt1AGf_ABf~.-- 8 .&7 SQ. MI. BfC.QiQi_~~~lL~RLE·--19 PERI ODIC OBSERVATIONS FROM OCTOBER 1964 THROUGH MAY 1968. NO CO NTI NUO US RECO RDS. AYf&AGE_OliC.tiABGE·-- Bf~AB~S.-- R E G ULATI ON OF FLOW NOT SIGNIFICANT. fXlBfMES·--P E ~IOUIC DATA: MAXIMUM 21 DEG. C, MAY 8, 1968 MINIMUM = 5 DEG. C, FEB. 11, 1966

WATER TEMPEKATURES FROM PERIODIC DATA, DEGREES CELSIUS PER I() [) l.lLBEC.U8.12 QC.I ... tlOll.a. OEC. ... JAI:l.a. ffR.a. tlAR.a. AfB..a. ~AY. .l!Jtlf JULY A~ ... Sff... 1965- 68 MA)(IMUM: 17 12 12 11 12 14 l7 21 •• ** ** ** M[ <\ /'.j : 17 12 10 11 9 12 13 17 ** •• ** •• MI NIMUM: 17 12 8 5 10 10 12 •• •• ** ** DAY S OF RFCORD: 1 1 4 2 2 2 2 0 0 0 0

RHEEM CREEK BASIN US GS: 11-1820.3 RHEEM CREEK AT SAN PABLO, CALIF. OWR: E-4-2200

LQC.AllUI:i·--LAT ~7 r,9 38, LOIIIG 122 21 10, SEC. O, T.O , R.O IN SA ~ ~A tl L O GRANT, ON LEFT HANK 50 FT DOWNST~EAM FROM SANTA FE R<\ILWAY B1 I UGE ~T SAN PA BLO AND 0.7 MILE UPSTREAM FROM MOUTH, CUNTRA COS TA COt JNTY. ALlllUUf_Q[_GAGC.--14 FT AB OVE MEAN SEA LEVEL. 08.A .l ~ AGLABB.--l.ll 9 s w. MI. BEC.Q ~ US_A~~llA~l l ·-- 5 7 PERI OO IC OBSERVATIO NS F~OM FEBRUARY 1961 THROUGH JULY 1968. NO CO NTINUOUS RE COKOS. A~E.RAGE_UlSC.tiA & G E .--1.36 CFS FOR 6 YEARS OF RECORD. !ifMA&~S.--SI G NIFICA N T REGUL<\TION OF FLOW BEGAN IN 1900. fJIBEMtS . --PERI ODI C DATA: 1'<\XI I' UM 27 D=G. C, APR. 30 , 1962, MAY 19, 1964 MINIMUM = 5 OfG. C, JAN. 17, 1962

WA Tf '\ TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PfRIOO iJL!lEC.i.J!!Il QC.I ... !:liUll ... QEC..a. JAt:J..a. fEll. ... MAB..a. Ae&.a. ~AY J.Ut:lf JULY AUG ... s.t.e ... l96l-&A MAXIMUM: 21 15 14 13 17 18 27 27 23 24 23 18 MF.A N: 18 13 10 9 12 16 21 20 19 22 21 17 MINIMUM: L 3 9 6 5 A 14 14 11 17 19 18 17 OhYS OF REC ORD: 5 9 4 5 3 5 5 5 4 2

26 PINOLE CREEK BASIN

US GS: 11-18?1. PINOLE CREEK AT PINU~E, CALIF. DWR: E-4-2400

LQ~AllD~.--L A T 37 58 21, LON G 12?. 14 43, SEC. o, T.O , R.O IN ~I N OLE G ~ A N T, ON LEFT BANK 0.2 MILE · DOWNST REAM FR OM COUNTY BRIDGE ON PINOLE V~LL F Y ROAD AND 0.8 MILE UPSTREAM FROM PINOL E CITY ROUNDARY, CONTRA COS TA COUNTY. ALlllUQf_Qf_GAGl.--170 FT ABOVE MEAN SEA LEVEL. QRAl~A~E-ABf~.--1 0 . 0 su. MI. BfC~BQS_A~41LA~Lf.-- Y PERI OD IC OBSERVATIO NS FROM FEBRUARY 1962 THROUGH APRIL 1962. JIICI CONTI NU nUS RE CORDS. AYEBAGE_QlSC ti d ~ GE.--~.60 CF S FOR 28 YEARS OF RECORD. BfMAB~S.-- ~ E ~ ULATIU N OF FLOW NOT SIGNIFICANT. RECORDS FURNISH ED BY fAST BAY MUNICIPAL UTILITY DISTRICT. EHREMfS..--P" RI!lDIC DATA: MAXI MUM 14 DEG. C, APR. 16, 1962 Ml~I MU M = 7 OEG . C, FEB. 19 , 1962

WATER TEMPERATURES FROM PERIODIC DATA, DEGRHS CELSIUS PERIO IJ ULBtCUBQ Qt;.I ... ~Q~ ... Of Ca. .JA~ ... Efll.a. MAR .a. A£B.a. l:lAY .J.U~f .JULY AU.!l.a. S.f£.& 1'1 62 MAXIMU M: ** ** ** ** 1? 14 ** ** ** •• •• MEAN: ** •• •• ** 10 14 •• ** ** ** ** MINIM UM: ** ** ** ** 9 13 ** •• ** ** ** DAYS UF RECORD: 0 0 0 0 4 2 0 0 0 0 0

ARROYO DEL HAMBRE BASIN US GS: 11-18?4. ARROYO DEL HAMBRE AT MARTINEZ, CALIF. DWR: E-0-4500

LQ~All~~.--LAT 38 0 1?, LON G 122 7 44, SEC. O, T.O • R.O • IN LA S J U ~ TAS GRANT, ON RIGHT BANK 40 FT UPSTREAM FROM 0 STREET BRIDGE IN MARTI NE Z, CON TRA COSTA COUNTY. ALlllUUE_Qf_GAGL.--48 FT ABO~E MEAN SEA LEVEL. QBAl~AGf_ABEA·--15.0 SQ. MI . Bf~QBQS._A~AlLAULC.--29 PERIO DIC OBSERVATIO NS FROM OCTOBER 1964 THROUGH SEPTEMBER 1968. NU CONTI NU OUS RECOR DS. A~fBAG~_QlS~ U A~Gf.-- BfMAB~S.-- REG ULATI O N OF FLOW NOT SIG JII IFICANT. fXIBEMES.--P ~ RlODIC OATA: MAXI~UM 22 OEG. C, JULY 5, 1968 MINIMUM = 7 DEG. C, DEC. 14, 1965

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS

PERI OD uL&Er.uau Q~I. tHl~ ... DEC. .JAti.a. EE!l.a. tiARa. A£Ra. t!AY J~f .JUU AU.!l.a. .sll..a. 1965-68 MAXIMUM: 16 14 11 13 10 9 14 14 16 22 19 18 MEAN: 15 13 9 13 10 9 13 14 14 20 18 18 MINIMUM: 13 12 7 13 10 8 ll 13 14 17 17 17 DAYS OF REC ORD: 4 4 2 1 1 2 2 3 3 2 3 2

PACHECO CREEK BASIN USGS: 11-1825. SAN RAMON CREEK AT SAN RAMON, CALIF. DWR: E-4-5150 LQf.AllUti·--LAT 37 46 20, LO NG 121 59 40, SEC. a, T.2 S, R.1 W, ON RI GHT HANK 0.2 MILE DOWNSTREAM FROM BOLLINGER CREEK ANO 1.0 MILE SOUTHWEST OF SAN RAMON, CONTRA COSTA COUNTY. ALlllUUf_Qf_ G A~E.--530 FT ABOVE MEAN SEA LEVEL. QRAltiA~E-A&f!·--5.89 SQ. MI. Rf~QBQS._A~AlLAllLE·--82 PER.IOOIC OBSERVATIONS FROM DECEMBER 1952 THROUGH JUNE 1968. NO CONTINUOUS RECORDS. A~fRA~E-DlS.!;.tlAB~E..--2.86 CFS FOR 15 YEARS OF RECORD. BEMAR~S.--RE G ULATION OF FLOW NOT SIGNIFICANT. EXIREME.S.--P ERIODIC DATA: MAXIMUM 26 DEG. C, AUG. 1, 1966 MINIMUM = 3 DEG. C, JAN. 3, 1968

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QLBf~URil on... tiO'l.a. OE.C..a. .JAti.a. Efll.a. tiARa. Ae&a. t!Ar .J.U~ .wu AU.!l.a. .sll..a.

1953-68 MAXIMUM: 17 l3 11 11 12 17 19 20 19 17 26 18 MEAN: 14 ll 9 7 8 10 15 16 15 17 22 18 MINIMUM: 11 8 4 3 6 5 10 9 13 17 l7 18 OAYS OF RECORD: 4 6 10 9 8 11 8 10 9 2 2 3

27 PACHECO CREEK BASIN USGS: 11-1S30. SAN RAMON CREEK AT WALNUT CREEK, CALIF. DWR: E-4-5100

LQ~AllU~.--LAT 37 53 4, LONG 122 3 o, SEC. o, T.O , R.O t ON BOUNDARY SET ARROYO DE LAS NUECES Y BOLBONES AND SAN RAMON GRANTS ON LEFT SANK AT TOWN OF WALNUT CREEK, 0.3 Ml DOWNSTREAM FROM SM TRIB AND 1.2 HI UPSTREAM FROM CONFLUENCE WITH LAS TRAMPAS CR, CONTRA COSTA COo AllllUQf_Qf_~A~f.--170 FT ABOVE MEAN SEA LEVEL. URAl~A~E-ABfA.--so.e SQ. MI. RfCQBQS_A~AlLAfiLf.--107 PERIODIC OBSERVATIONS FROM DECEMBER 1952 THROUGH MARCH 196S. NO CONTINUOUS RECORDS. A~fBAGf_QlS~tlABGf.--14.S CFS FOR 15 YEARS OF RECORD. Rf~AR~S.--REGULATION OF FLOW NOT SIGNIFICANT. f~lRf~fS.--PERIODIC DATA: MAXIMUM 2S DEG. C, MAY 2, 1966 MINIMUM = 3 DEG. C, JAN. 5, 1967

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD !JLRf~QRQ !J~l ... !:li!J~ ... DE~ ... .tAt:t ... ffli.a. ~A B.a. AfR.a. ~AY .tll!jf .JUU AUG.a. s"fe... 1953-6S MAXIMUM: 21 14 12 9 12 16 23 2S 24 25 25 23 MEA "l : 16 11 s 7 10 12 15 17 19 23 21 21 MINIMUM: 9 8 5 3 6 7 7 12 16 21 17 17 DAYS OF RECORD: 9 11 l3 7 10 14 10 9 9 5 5 5

USGS: 11-1S35. WALNUT CREEK AT WALNUT CREEK, CALIF. DWR: E-4-4300 LOCAll!J!:li.--L4T 37 54 21, LONG 122 3 22, SEC. O, T.O , R.O IN ARROYO OE LAS NUECES Y SOLBONES GRANT, ON RIGHT BANK AT SOUTHERN PACIFIC RAILROAD BR AT TOWN OF WALNUT CREEK, 0.7 Ml DOWNSTREAM FROM CONFLUE NCE OF SAN RAMON AND LAS TRAMPAS CREEKS, CONTRA COSTA COUNTY. ALlllUQf_Qf_~A~f.--103 FT ABOVE MEAN SEA LEVEL. URAl!:liAGf_ABfA.--79.2 SQ. MI. BfCQBQS_A~AlLA!iL£.--165 PERIODIC OBSERVATIONS FROM DECEMBER 1952 THROUGH JULY 196S. NO CONTINUOUS REC ORDS. A~E&A~f_QlS~tlA&~f.--29.0 CFS FOR 15 YEARS OF RECORD. Bf~AB~S.--SI G NIFICANT REGULATION OF FLOW BEGAN IN 1900. E!lREtlfS.--PERIODIC DATA: MAXIMUM 26 DEG. C, JUNE 2, 1964 MINIMUM = 4 DEG. C, DEC. 15, 1957

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERI OD IJLBE~IJBQ OCI.a. ~a~ ... DEC ... .JAI:i.o. EEfi.a. MR... Af.R ... ~y JU!:if JULY AUG ... SEe... 1953-&S MAXIMUM: 21 17 11 14 14 1S 19 21 26 25 26 26 MEAN: 17 12 s 9 ll 13 15 17 19 22 22 21 MINIMUM : 11 s 4 5 4 7 6 12 15 17 14 17 DAYS OF RECORD: 13 13 15 1S 22 1S 15 l3 13 7 7 11

US GS: 11-1836.5 WALNUT CREEK AT PLEASANT HILL, CALIF. DWR:

LQ~AllQ~.--LAT 37 57 19 , LON G 122 3 14, NE1/4 SEC. 11, T.l N, R.2 w, 0.5 MILE UOWNST ~ EAM FROM STATE HIGHWAY 24 BRIDGE, AND 1 MILE NORTHEAST OF PLEASANT HILL, CONTRA COSTA COUNTY. AllllUQf_Qf_~A~f.-­ Q&Al~A~f-A&fA.-- BE~QBQS_A~AlLA8Lf·-- 6 PERIODIC OBSERVATIONS FROM NOVEMBER 1959 THROUGH JUNE 1962. NO CONTI NU OUS RFC ORDS. A~.f.BA~f_QlS~tlAB~f.-- B.f.tiAB~S.-- R E G ULATI O N OF FLOW NOT SIGNIFICANT. RECORDS FURNISHED BY CALIFORNIA DEPARTMENT OF WATER RESOURCES. f!l&fMfS.--PERIODIC DATA: MAXIMUM 23 DEG. C, JUNE 1, 1962 MINIMU M = 10 DEG. C, JAN. R, 1960, MAR. 4, 1960, NOV. 6, 1959

WATFR TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIO D UL&t~QBQ Q~I ... ~Oil ... DEC ... JA~ ... E£8... t!AR.o. !£B.a. HAY Jllli.E JULY AUG ... SEe... 1960-6:? MAXIMUM: ** 10 ** 1'0 ** 10 ** 23 23 22 •• •• MEAN: ** 10 ** 10 ** 10 •• 23 23 22 •• ** MINIMUM: ** 10 ** 10 ** 10 ** 23 23 22 ** •• DAYS OF RECORD: 0 1 0 1 0 1 0 1 1 1 0 0

28 YACHECO CREEK BASIN

USGS: 11-1840. GALINDO CREEK AT CONCORD, CALIF. DWR: E-4-4250

LC,AI~Q~.--LAT 37 58 o, LONG 122 1 30, SEC. o, T.O , R.O , IN MONTE DEL DIABLO GRANT, ON RIGHT BANK JUST OFF COWELL ROAD, 0.2 MILE SOUTHEAST OF CONCORD AND 1.2 MILES UPSTREAM FROM MOUTH, CONTRA COSTA COUNTY. ALiliUQf_Qf_~A~f.--80 FT ABOVE MEAN SEA LEVEL. DBA~NAGf_ABfA.--6.17 SQ. MI. Rf,QRQS_!~AlLAaLf.--18 PERIODIC OBSERVATIONS FROM JUNE 1955 THROUGH HAY 1958. NO CONTINUOUS RECORDS. A~fBAGf_IJlS,tlA&Gf.-- Rf!!ARIS.S.--SIGNIFICANT REGULATION OF FLOW BEGAN IN 1900. f!l&f~fS.--PERIODIC DATA: MAXIMUM = 24 DEG. C, JUNE 27, 1957 MINIMUM 4 DEG. C, DEC. 18, 1956

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD IJLRE,DRU C'L. Wl~ Dll.a. .l!fi.a. Efa... !!!&... AeB... !!AI ~ .Jl.ILI AWi.a. Sf.f... 1955-58 MAXIMUM: 9 14 4 6 l3 15 ** 21 24 ** 22 11 MEAN: 9 12 4 6 13 13 ** 20 22 ** 20 11 MINIMUM: 9 8 4 6 13 10 ** 19 19 ** 18 11 DAYS OF RECORD: ~ 2 1 1 1 4 0 2 3 0 2 1

USGS: ll-1845. PINE CREEK AT CONCORD, CAliF. DWR: E-4-4200

L~!I~Q~.--LAT 37 58 13, LONG 122 2 42, SEC. o, T.O , R.O IN MONTE DEL DIABLO GRANT, ON RIGHT BANK AT CONCORD, JUST UPSTREAM FROM MARKET STREET BRIDGE, 0.2 MILE DOWNSTREAM FROM SMALL TRIBUTARY AND 0.8 MILE UPSTREAM FROM MOUTH, CONTRA COSTA COUNTY. ALiliUQf_Cf_GAGf.--30 FT ABOVE MEAN SEA LEVEL. D&~AGf_ABfA.--26.6 SQ. MI. Rf,IJRQS_A~AlLAaLf.--30 PERIODIC OBSERVATIONS FROM JANUARY 1953 THROUGH OCTOBER 1960. NO CONTINUOUS RECORDS. A~fRAGf_Q~S,tlARGf.--3.81 CFS FOR 8 YEARS OF RECORD. &f!!ARKS.--REGULATION OF FLOW NOT SIGNIFICANT. fXl&f!!fS.--PERIODIC DATA: MAXIMUM 28 DEG. C, AUG. 11, 1955, APR. 27, 1957 MINIMUM = 7 DEG. C, FEB. 2, 1960 0 MAR. 22 0 1960, DEC. 2 0 1959

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD IJL&f,URD ~I ... fiO~ ... DE~ .tAN... EEa ... !!!&... Ae&.a. !!AI .J.1Hif .Jl.ILI AUG... Sf£& 1953-61 MAXIMUM: 19 ** 9 l3 12 16 28 19 27 22 28 23 MEAN: 12 ** 8 13 9 12 19 18 23 18 28 21 MINIMUM: 8 ** 7 13 7 7 9 16 19 14 28 17 DAYS OF RECORD: 3 0 2 1 4 5 3 3 3 2 1 3

USGS: ll-1850. GRAYSON CREEK NEAR HOOKSTON, CALIF. DWR: E-4-4100

LC'Al~Qfi.--LAT 37 57 5, LONG 122 5 5, SEC. o, T.O , R.O IN LAS JUNTAS GRANT, ON RIGHT BANK 0.3 MILE UPSTREAM FROM UNNAMED TRIBUTARY AND 1.9 MILES NORTHWEST OF HOOKSTON, CONTRA COSTA COUNTY. ALlllUQf_Qf_GAGf.--80 FT ABOVE MEAN SEA LEVEL. ~fiAGf_ARfA·--1.94 SQ. MI. Rf,IJRQS_!~AlLAaLE·--11 PERIODIC OBSERVATIONS FRO.M MARCH 1956 THROUGH OCTOBER 1959. NO CONTINUOUS RECORDS. A~f&A~E-DlS~tlARGf.--0.500 CFS FOR 6 YEARS OF RECORD. Rf!!ARKS·--REGULATION OF FLOW NOT SIGNIFICANT. fXI&f!!fS.--PERIODIC DATA: MAXIMUM 22 DEG. C, MAY 28 9 1957 MINIMUM = 7 DEG. C, OCT. 19 1 1959

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD OLRf,QRD ~ ... NO~ DE~ .tAN... f.fa... !SAL. AeB... &I ~ .wu AWi.a. Sf.f... 1956-60 MAXIMUM: 7 ** ** ** 11 18 19 22 ** •• •• •• MEAN: 7 ** •• 11 13 17 19 •• •• •• •• MINIMUM: 7 •• 11 9 13 15 DAYS OF RECORD: 1 ••0 ••0 ••0 1 5 2 2 ••0 ••0 ••0 ••0

29 PACHECO CREEK BASIN

USGS: ll-1851~ GRAYSON CREEK NEAR PACHECO, CALIF. DWR: E-4-4150

LO,AIIU~.--LAT 37 57 25, LONG 122 4 20, SEC. o, ~.0 , R.O , IN LAS JUNTAS GRANT, ON DOWNSTREAM SIDE OF BRIDGE, 0.6 MILE DOWNSTREAM FROM UNNAMED TRIBUTARY AND 1.8 MILES SOUTH OF PACHECO, CONTRA COSTA COUNTY. ALl!IUUf_Qf_GAGf.--40 FT ABOVE MEAN SEA LEVEL. DRA~AGE-ABfA.--4.3& SQ. MI. Rf,ORUS_A~A!LAaLE·--15 PERIODIC OBSERVATIONS FROM MARCH 1956 THROUGH MAY 1958. NO CONTINUOUS RECORDS. A~ERAGf_UlS,tlABGE.-- &f~AR~S.--SIGNIFICANT REGULATION OF FLOW BEGAN IN 1900. fllRE~tS·--PERIODIC DATA: MAXIMUM 27 DEG. C, SEP. 9, 1957 MINIMUM = 8 DEG. C, MAR. 5, 1956

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD OLRE,URU Q,I... ~a~ ... Qfk J.A~ ... EEa.a. t!AR.a. AU.a. ~n J.U~f J.UL.Y AUG .a. Sff..o. 1956-58 MAXIMUM: 9 ** 12 •• 16 17 19 18 •• ** 23 27 MEAN: 9 •• 12 ** 14 12 14 18 ** •• 23 27 MINIMUM: 9 •• 12 •• 13 8 9 17 ** ** 23 27 flAYS OF RECORD: l 0 1 0 2 4 3 2 0 0 1 1

NAPA RIVER BASIN USGS: 11-4559.5 SULPHUR CREEK NEAR ST. HELENA, CALIF. DWR: E-3-1520

LO,AllU~.--LAT 36 29 20, LONG 122 26 50, NE1/4 SEC. 2, T.7 N, R.6 w, ON RIGHT BANK JUST DOWNSTREAM FROM PRIVATE ROAD BRIDGE, 1,000 FT UPSTREAM FROM HEATH CANYON AND 1.3 MILES SOUTHWEST OF ST. HELENA, NAPA COUNTY. ALI!IUUf_Qf_GAGE.--303 FT ABOVE MEAN SEA LEVEL. QRAl~AGf_ABfA.--4.50 SQ. MI. Rf,Q~US_A~AlLAaLf.--15 PERIODIC OBSERVATIONS FROM JANUARY 1966 THROUGH AUGUST 1967. NO CONTINUOUS RECORDS. A~fRAGE_QISCtlABGE.-- Rf~AB~S.--R EG ULAriON OF FLOW NOT SIGNIFICANT. EX!BEMfS.--PERIOOIC DATA: MAXIMUM 24 OEG. C, JULY lOt 1967 MINIMUM = 7 DEG. C, JAN. 4, 1966

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PE'RIO D uLRECUBU ocr ... ~a~ ... Of,... .J.Al'i.a. EEa.a. ~AR.a. Aea ... t!AX J.U~f JUL-Y AUG .a. SEe .a. 1966-67 MAXIMUM: ** •• 12 12 9 8 12 14 22 24 22 •• MEAN: •• ** 12 9 9 8 12 14 22 23 22 ** MINIMUM: ** •• 12 7 9 8 12 13 22 22 22 ** O'AYS OF RECORD: 0 0 1 4 1 2 1 2 l 2 1 0

USGS: 11-4560. NAPA RIVER NEAR ST. HELENA, CALIF. DWR: E-3-1500 LOCAilQ!'i.--LAT 38 29 40, LON G 122 25 50, SEl/4 SEC. 32, T.8 N, R.5 W, ON RIGHT OAN K 0.2 MILF UPSTREAM FROM HIGHWAY BRIDGE, 1.3 MILES NORfHEAST OF ZINFANDEL, AND 2.5 MILES EAST OF ST. HELENAi NAPA COUNTY. AL!llUQf_Qf_GAGf.--173 FT ABOVE MEAN SEA LEVEL. OB.Al~A~~-AB~~.--81.4 SQ. MI. Bf~QBQS_A~AlLAULf.--377 PERIODIC OBSERVATIONS FROM DECEMBER 1951 THROUGH AUGUST 1968. CONTINUOU ~ RECORD F~OM DCTOHEA 1957 THROUGH SEPTEMBER 1968. A~f~AG~_Q!SCtlAB~~.--90.1 CFS FOR 31 YEARS OF RECORD. B.~MA&!$..S..--qE GlJ LATION OF FLOW NOT SIGNIFICANT. fl!.IREM~.S.· --CliNTI NUOUS DATA: MA~IMUM = 13 OEG. C, JULY 18, 1968 Ml\liMUM = :~ DE'G. c,· DEC. 14, 1967, DEC. 15, 1967 PER IODIC DATA: MA~IMUM 28 OEG. C, JULY 15, 1959 , JULY 10, 1963 Ml'liMUM = 4 DEG . C, DEC. 15, 1967

I.-A TER TEMPERATURES FROio! ONCE DAILY DATA, DEGREES CELSIUS

YEAR ucr ... t::IU.'l ... U.EC.a. J.AI::I.a. ff.!l.a. .t1AB. ... Aea ... .t1A:x: J.Utlf JULY AUG .a. .Sf f ... l '} )!l '!AX I MUM: 17 14 12 12 15 14 20 21 24 22 24 22 MLAN: 16 12 10 10 12 11 14 17 19 21 18 17 MIN !MtiM: 14 7 7 9 7 10 14 14 18 13 13 lq59 MAX IMUM: 17 14 11 14 16 18 22 22 26 25 ** 22 Mf: A;-1 : 12 9 9 12 12 16 20 19 21 18 ** 17 MI"

30 NAPA RIVER BASIN USGS: 11-4560.--Continued

WATER TEMPERATURES F~OM ONCE DAILY DATA, DEGREES CELSIUS

1960 ~1 AXI M UM: 21 14 11 12 13 18 20 23 26 28 25 21 MEAN: 20 13 9 9 11 12 13 17 22 23 20 16 MINIMUM: 18 11 4 6 7 7 9 10 18 18 17 11

1961 MAXIMUM: 23 14 13 13 16 19 23 22 29 26 23 21 Mt::AN: 16 ll 9 8 12 13 16 18 23 22 21 16 MINIMUM: 12 7 4 4 9 9 8 13 17 18 18 12

1'158- MAXIMUM: 23 14 13 14 16 19 23 23 29 28 25 22 19 61 MeAN: 16 11 9 10 12 13 16 18 21 21 20 17 Mi.'i!MUM: 4 4 4 7 7 8 10 13 16 13 11 Dl\ YS lJF ~FCIJRD: 27 40 51 102 103 lli 95 62 50 42 24 27

WATE~ TEMPERATURES t~OM THERMOGRAPH OATA, DEGREES CELSIUS

YEA.B.

1962 MAXIMUM: 15 12 12 11 12 18 22 24 26 25 24 22 'I!= AN: 13 11 9 9 11 12 18 19 21 23 22 19 MINIMUM: 10 8 5 8 9 14 14 16 19 21 17

1963 MAXIMUM: 18 17 14 13 17 18 21 24 28 24 24 23 MtA~: 16 14 12 10 14 15 16 19 22 19 22 19 MINIMUM: 14 11 8 a· 13 11 13 14 18 17 19 15 1964 MAXIMUM: ** ** ** ** 13 16 18 ** ** 25 22 19 MEAN: ** ** ** ** 11 13 16 ** ** 21 19 15 MINIMUM: ** ** ** ** 10 11 13 ** ** 17 17 12 196 5 MAXI r-uM: 16 ** ** ** 14 18 22 23 22 24 24 22 M[l\,~: 13 ** ** ** 13 14 16 19 19 21 22 18 MI.'HMUM: 12 ** ** ** 11 12 11 14 17 18 19 14 1'166 MAXIMUM: 17 14 12 13 19 22 24 24 25 ** ** MEi\N: 15 12 10 10 13 18 20 23 22 ** ** MINIMUM: 13 8 8 14 16 22 19 ** ** 1967 MAXIMUM: 18 13 12 14 14 16 15 23 27 27 23 22 MEAN: 14 12 11 12 13 13 12 17 20 23 21 19 Ml"'IMUM: 11 8 9 11 9 9 11 14 20 17 16

l'l6A MAXIMUM: 17 16 10 10 15 18 22 25 28 33 27 20 MfA"': 15 13 7 8 12 13 16 19 22 22 19 17 MINIMUM: 13 3 4 7 9 12 14 17 16 15 12

19 62- M~XIMUM: 18 17 14 14 17 19 22 25 28 33 27 23 1968 MEA >~: 14 12 9 10 12 13 16 19 21 22 21 18 MINI,..LJM: 10 8 3 4 7 8 9 11 14 16 15 12 DAYS UF RECORD: 166 150 155 153 145 217 195 186 151 206 180 177

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIO D ULBf(.UBQ

1'152-68 MAXIMUM: 18 20 14 13 15 18 23 24 24 28 25 23 MFAN: 16 13 10 9 12 12 16 17 21 23 20 19 MINIMUM: 12 9 4 4 6 8 10 12 16 18 13 15 DAYS UF RECORD: 31 24 31 44 44 37 33 35 26 29 23 20

31 NAPA RIVER BASIN USGS: 11-4565. CONN CREEK NEAR ST. HELENA, CALIF. DWR: E-3-1450

LU~AllQ~.--LAT 38 28 55, LON G 122 22 25, SWl/4SW1/4 SEC.1, T.7 N, R.5 W, IN OUTLET POOL AT TOE OF CONN DAM, 1.8 MILES UPSTREAM FROM BRIDGE ON STATE HIGHWAY 28, 5.4 MILES EAST OF ST. HELENA, ANO 8 MILES UPSTREAM FROM ~OUTH, NAPA COUNTY. lllliUULQL~AtiE·--230 FT ABOVE MEAN SEA LEVEL. QB.Al~Atif_ABEA·--53.2 SQ. MI. BE~QBQS_A~AlLAaLE.·--40 PERIODIC OBSERVATIONS FROM MARCH 1950 THROUGH JUNE 1959. NO CONTINUOUS RECORDS. A~EBAG~_QlSC U ABG£.--33.9 CFS FOR 16 YEARS OF RECORD. BfMAB~S.--SI GN IFICANT REGULATION OF FLOW BEGAN DECEMBER 1945. EJIBEMES.--PERIODIC DATA: MAX I MUM 26 DEG. C, AUG. 11, 1952 MINIMUM = 5 DEG. C, MAR. 5, 1958

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QE_B.E~UBQ Q~I ... J'lQ~ ... Oft.... .JAtj ... Ell.a. MAB..a. AfB.a. MAY J.U!jf .J.ULY AUG ... Sff.a. 1950-'59 MAXIMUM: 20 ** ** 12 9 14 17 20 21 20 26 23 MEAN: 18 ** ** 9 9 11 16 18 19 19 22 23 MINIMUM: 16 ** ** 9 5 12 17 17 18 20 23 DAYS OF RECORD: 4 0 6 1 5 7 3 7 3 3 1

USGS: 11-4570. DRY CREEK NEAR NAPA, CALIF. DWR: E-3-1330

LQ~AIIQ~.--LAT 38 21 23, LONG 122 21 50, SW1/4 SEC. 9, T.6 N, R.4 W, IN NAPA GRANT, ON R1GHT HANK 3.7 MILES UPSTREAM FROM MOUTH AND 5.5 MIL ES NORTHWEST OF NAPA, NAPA COUNTY. All1IUQf_Q£_GAGf.--1YO FT ABOVE MEAN SEA LEVEL. QBAI~AGE_ABEA·--17.4 SQ. MI. B.E~QBQS_A~AlLAaL£.--99 PERIODIC OBSERVATIONS FROM MARCH 1951 THROUGH AUGUST 1966. NO CO NTINUOUS RECORD S. A~EB.AGf_QISt.tlABG£.--19.6 CFS FOR 15 YEARS OF RECORD. BEMAB~S.--R E~U LATION OF .FLOW NOT SIGNIFICANT. EJIBEME.S.--P ER IO OIC DATA: MAXIMUM 24 DEG. C, JULY 6, 1954 MINIMUM = 3 DEG. C, JAN. 10, 1957

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOO OLB.ECUBQ ocr ... tjQ~ ... OE.C. ... .JAti.a. EE.a.a. MAB..a. AfB.a. HAY .UJtiE .JULY AUG ... Sf f... 1951-66 MAXIMUM: 17 12 14 12 15 14 16 21 19 24 20 17 MEAN: 13 10 9 9 9 10 13 14 16 16 18 l7 MINIMUM: 12 B 6 3 5 6 11 9 13 12 12 17 DAYS OF REC OR D: 7 6 9 14 6 14 11 B 10 8 5 1

USGS: 11-4580. NAPA RIVER NEAR NAPA, CALIF. DWR: E-3-125D LUC.AI1Qt1.--LAT 38 22 &, LONG 122 18 B, SE1/4NE1/4 SEC.16, T.6 N, R.4 W, IN YAJOME GRANT, ON LEFT BANK AT DOWNSTREAM SIDE OF OAK KNOLL AVENUE BRIDGE, 0.4 MILE DOWNS TREA M FROM DRY CREEK AND 5 MILES NORTH OF NAPA, NAPA COUNTY. Al!llUQf_QE_GAtif·--25 FT ABOVE MEAN SEA LEVEL. QBAI~Atif_ABEA·--21 8 SQ. MI. B.fC.QaQS_A~AILAaLE·--68 PERIODIC OBSERVATIONS FROM DECEMBER 1959 THROUGH AUGUST 1968. NO CONTI NUOU S RECORDS. A~E&A~E-QISt.bA B ~E.--150 CFS FOR 11 YEARS OF RECURD. BEMA&~S.--SI GNIF ICANT KEGULATION OF FLOW BEGAN DECEMBER 1945. fJIBEMES.--P fR lDDIC UATA: MA~ I MUM 26 OEG. C, AUG. 5, 1963 MI~IMUM = 2 DEG. C, DEC. 15, 1967

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS

PtRIOIJ UE_BEC.UBQ QC.I.a. !10~ ... UEC..a. .JA!::i ... EEa... HAB.a. AfB.a. MAY J.Ut:lf .J!JLY AUG ... SEe .a. 1960-68 MAXIMUM: 21 19 16 11 13 15 18 22 25 24 26 22 MEAN: 18 13 10 9 11 12 15 18 20 24 23 21 MINIMUM: 14 q 2 7 9 9 13 12 18 23 20 20 DAYS OF RECORD: 3 7 7 8 5 9 3 4 7 6 6 3

32 NAPA RIVER BASIN USGS: 11-4582. REDWOOD CREEK NEAR NAPA, CALIF. DWR: E-3-1200

LU~AllQ~.--LAT 38 19 5, LONG 122 20 35, SE1/4 SEC. 31, T.6 N, R.4 W, IN NAPA GRANT, ON RIGHT BANK 2.9 MILES UPSTREAM FROM CONFLUENCE WITH BROWNS VALLEY CREEK AND 3.4 MILES NORTHWEST OF NAPA, NAPA COUNTY. ALiliUQE_QE_~A~E.--166 FT ABOVE MEAN SEA LEVEL. QBAl~A~E-ABE~.--9.01 SQ. MI. BE~QBQS_A~AllAaL£.--71 PERIODIC OBSERVATIONS FROM AUGUST 1958 THROUGH JUNE 1968. NO CONTINUOUS RECORDS. A~EBA~~-QlS~~A~~E.--9.19 CFS FOR 9 YEARS OF RECORD. BEMAB~S.--REGULATION OF FLOW NOT SIGNIFICANT. E~IBEM£S.--PERIODIC DATA: MAXIMUM 24 DEG. C, AUG. 26, 1966 MINIMUM = 3 OEG. C, DEC. 15, 1967

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD OLBE~QBQ Q~I .. MO~a. QE~a. JAM a. EElla. I:!AB ... A£Ba. I:!AY J.U~E J.UU AUlia. SE£.&

1Y58-68 MAXIMUM: 19 15 16 13 13 13 16 17 16 22 24 17 MEAN: 17 13 11 9 10 10 - 13 14 14 19 20 17 MINIMUM: 14 10 3 6 7 8 12 12 12 17 18 17 DAYS Of RECORD: 2 5 11 10 8 9 5 5 7 3 5 1

USGS: 11-4583.5 NAPA RIVER AT DUTTON LANDING NEAR VALLEJO, CALIF. DWR: E-3-1005

LQ~AllU~.--LAT 38 12 35, LONG 122 18 18, NE1/4 SEC. 9, T.4 N, R.4 w, ON LEFT 8ANK AT DUTTON LANDING, JUST UPSTREAM FROM RAILROAD RRIDGE, 1,100 FT QOWNSTREAM FROM FAGAN SLOUGH, AND 8.0 MILES NORTHWEST OF VALLEJO, NAPA COUNTY. ALiliUQE_QE_~A~f.-­ QBAl~A~E-ABEA·-- BE~QBQS_A~AlLAaL£.-- 7 PERIODIC OBSERVATIONS FROM JUNE 1966 THROUGH MAY 1967. NO CONTINUOUS RECORDS. A~EBA~E-QlS~UABGE.-- BEI:!AB~S.--REGULATION OF FLOW NOT SIGNIFICANT. RECORDS FURNISHED BY CALIFORNIA DEPARTMENT OF WATER RESOURCES. EXlBEI:!E.S.--P~RIODIC DATI: MAXIMUM 22 DEG. Ct MAY 24, 1967 MINIMUM = 9 OEG. C, JAN. 27, 1967

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD I.ILBE~UiW Q~I ... t!!Ull. ... QE.~ .. JAt!!_.. EE.6.a. I:! AB.a. .A ea .. I:!AY JU~E .JULY AUG.& SEE.& 1966-67 MAXIMUM: ** 15 ** 9 ** 13 ** 22 17 18 ** 21 MEAN: ** 15 ** 9 ** 13 ** 22 17 18 ** 21 MINIMUM: ** 15 ** ** 13 ** 22 17 18 ** 21 DAYS OF RECORD: 0 l 0 0 l 0 1 l l 0 1

SONOMA CREEK BASIN USGS: 11-4585. SONOMA CREEK AT AGUA CALIENTE, CALIF. DWR: E-2-6200 SONOMA CREEK AT BOYES HOT SPRINGS.

LQ~AllQ~.--LAT 38 19 24, LONG 122 29 36, NE1/4 SEC. 2, T.5 N, R.6 w, IN AGUA CALIENTE GRANT ON LEFT RANK 150 FT UPSTREAM FROM BRIDGE AND 0.4 MILE WEST OF AGUA CALIENTE, SONOMA COUNTY. AUliUQE_QL!:lA~f.--120 FT AAflVE MEAN SEA LEVEL. QBAl~A~E-ABE.A.--58.3 sw. MI. BE~QBQS_Ali.AlLAaLf.--274 PERIODIC OBSERVATIONS FROM FEBRUARY 1955 THROUGH SEPTEMBER 1968. NO CONTtNUOUS RECORDS. A~EBA~E_QlS~UABGE.--71.1 CFS FOR 12 YEARS OF RECORD. BE.I:!AB~S.--REGULATION OF FLOW NOT SIGNIFICANT. PRIOR TO JULY 25, 1967, AT SITE 0.8 MILE DOWNSTREAM. EXlBEI:!ES.--PERIDDIC DATA: MAX I MUM 28 DEG. C, JULY 29, 1964 MINIMUM = 4 DEG. C, JAN. 10, 1957, JAN. 14, 1963

WI TER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD OLBE~llBO Q~I ... MQ~_.. llE~.& JAt!l.o. EE.R.& MAB.& A£B_.. I:!U JU.t:lf .J.UU AUG_.. SEE.& 1955-68 MAXIMUM: 27 16 13 14 14 17 20 19 25 28 27 26 MFAN: 18 12 9 9 11 12 13 16 21 22 23 21 MINIMUM: 13 9 4 4 6 6 9 11 15 13 21 17 DAYS OF RECORD: 10 11 22 36 62 57 30 9 15 11 5 6

33 PETALUMA RIVER BASIN USGS: 11-4590. PETALUMA RIVER AT PETALUMA, CALIF. OWR: E-2-5200

LO~!IlQ~.--LAT 3B 15 40, LONG 122 39 35, NE1/4SW1/4 SEC.20, T.5 Nt R.7 Wt IN ROBLAR DE LA MISERIA GRANT, ON RIGHT BANK 70 FT DOWNSTREAM ~ROM COUNTY HIGHWAY BR~DGE IN PETALUMA AND 1.3 MILES DOWNSTREAM FROM LICHAU CREEK, SONOMA COUNTY. ALlliUDf_Qf_GA~·--20 FT ABOVE MEAN SEA LEVEL. DBAl~AGf_A&fA·--30.9 SQ. MI. Rf~CRDS-A~AlL!aLf·--47 PERIODIC OBSERVATIONS FROM JANUARY 1950 THROUGH DECEMBER 1961. NO CONTINUOUS RECORDS. A~fR!Gf_QlS,tlAR~f.--17.0 CFS FOR 15 YEARS OF RECORD. &fal&~S.--REGULATION OF FLOW NOT SIGNIFICANT. fJI&f!fS·--PERIODIC DATA: MAXIMUM 17 DEG. Ct APR. 14, 1955 MINIMUM = 4 DEG. Ct JAN. 15, 1950

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QLRE~QRO on£ ti~£ Qft... JAl4 fEB.... !SAL. Af&a. !Al JlJtif .wu AUli... Sff.. 1950-62 MAXIMUM: 16 •• 11 12 12 16 17 16 14 •• •• •• MEAN: 16 •• 9 B 9 12 14 14 14 •• •• •• MINIMUM: 16 7 4 6 9 12 14 14 •• •• •• DAYS OF RECORD: 1 ••0 8 10 10 9 5 3 1 0 0 0

NOVATO CREEK BASIN USGS: 11-4595. NOVATO CREEK AT NOVATO, CALIF. DWR: E-2-3200 NOVATO CREEK NEAR NOVATO.

L~AllQ!II •. --LAT 38 6 28, LONG 122 34 44, ·NW1/4 SEC. 13, T. 3 N, R. 7 w, IN NOVATO GRANT, ON LEFT BANK IN NOVATO 100 FT UPSTREAM FROM 7TH STREET BRIDGE, MARIN COUNTY. !LlllUQf_Qf_GAGf.--30 FT ABOVE MEAN SEA LEVEL. DBAlliiAGLARU. --17. 6 SQ. MI. ~CRQS_A~!lLAaLf.--88 PERIODIC OBSERVATIONS FROM DECEMBER 1952 THROUGH JUNE 1968. NO CONTINUOUS RECORDS. fifUGf_QlS,liA~.--11.3 CFS FOR 21 YEARS OF RECORD. &f!~S.--SIGNIFICANT REGULATION OF FLOW BEGAN DECEMBER 1951. PRIOR TO AUG. 23, 1967, AT SITE 0.6 MILE UPSTREAM. RECORDS FURNISHED BY MARIN COUNTY WATER DISTRICT. fllRf!fS.--PERIODIC DATA: MAXIMUM 21 DEG. C, JULY 10, 1967 MINIMUM = 6 DEG. Ct JAN. 2, 1957

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD CL&f,QRD a~ ~ Oft... .JAiila. fEB.... !A!£ AfR£ 1!AY .w.w; .wu ~ Sf.e.. 1953-68 MAXIMUM: 1B 14 14 12 13 14 11 19 19 21 19 18 MEAN: 17 12 11 9 10 11 13 15 16 19 18 18 MINIMUM: 16 9 6 6 8 9 9 12 13 17 16 18 DAYS OF RECORD: 2 6 11 12 9 9 11 B 10 4 4 2

CORTE MADERA CREEK BASIN USGS: 11-4600. CORTE MADERA CREEK AT ROSS, CALIF. DWR: E-2-1200

LO~AllDiii·--LAT 37 57 45, LONG 122 33 20, NE1/4 SEC. 8, T.1 N, R.6 w, IN PUNTA DE QUENTIN GRANT, ON LEFT BANK BEHIND FIRE STATION AT ROSS, 1.7 MILES SOUTHWEST OF SAN RAFAEL AND 4 HILES UPSTREAM FROM MOUTH, MARIN COUNTY. ALlliUQf_Qf_GAGf.--11 FT ABOVE MEAN SEA LEVEL. DB&lliiAtif_ARfA·--18.1 SQ. MI. Rf,C&QS_!~AlLAaLf.--124 PERIODIC OBSERVATIONS FROM NOVEMBER 1950 THROUGH SEPTEMBER 1968. NO CONTINUOUS RECORDS. ~fR!Gf-DlS~tl!RGf.--26.5 CFS FOR 16 YEARS OF RECORD. &f!!RKS·--SIGNIFICANT REGULATION OF FLOW BEGAN IN 1900. Eli&f!fS.--PERIOOIC DATA: MAXIMUM 22 DEG. Ct AUG. 25, 1966 MINIMUM = 3 DEG. Co DEC. 14, 1967

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD Df..Rf~RD Dn£ Iii~ Of~ .J!tia. fEB.... !SAL. Af&a. 1!AY .w.w; .wu AUG& Sf.e.. 1951-6B MAXIMUM: 20 16 12 12 14 15 16 18 20 20 22 18 MEAN: 17 12 10 9 9 11 12 14 17 18 18 17 MINIMUM: 15 7 3 6 8 5 9 12 14 15 16 16 DAYS OF RECORD: 9 12 11 10 9 10 12 10 11 11 9 10

34 ARROYO CORTE MADERA DEL PRESIDIO BASIN USGS: 11-4601. ARROYO CORTE MADERA DEL PRESIDIO AT HILL VALLEY, CALIF. DWR:

~AllQ~.--LAT 37 53 50, LONG 122 32 6, NW1/4 SEC. 33, T.1 N, R.6 W, IN SAUSALITO GRANT, ON RIGHT BANK NEAR SOUTH BOUNDARY OF TOWN OF MILL VALLEY 1 MILE UPSTREAM FROM MOUTH, MARIN COUNTY. ALlllUQf_Qf_GAGf.--2 FT ABOVE MEAN SEA LEVEL. ~Gf_ARfA.--4.69 SQ. MI. &iLil&DS_!~!lLAaLE·--34 PERIODIC OBSERVATIONS FROM OCTOBER 1965 THROUGH SEPTEMBER 1968. NO CONTINUOUS RECORDS. A~&!GE_DlS~tl!&GE·-- BfH!&KS.--REGULATION OF F~OW NOT SIGNIFICANT. Ul&f!ES·--PERIODIC DAlAi MAXIMUM 22 DEG. C, AUG. 25, 1966 MINIMUM = 6 DEG. C, JAN. 22, 1967, JAN. 12 1 1968, DEC. 13, 1967

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD DLRE~&D ll~L. tm~ llfk& .LAth Efll... !!!&. Ae&a !SAY .Jlmf .JUU AJ.IG& ~ 1966-68 MAXIMUM: 21 16 14 9 10 11 13 13 21 22 22 16 MEAN: 18 16 10 1 10 10 12 13 17 17 21 16 MINIMUM: 16 15 6 6 10 9 10 12 13 15 20 16 DAYS OF RECORD: 3 2 5 4 1 3 3 3 3 3 2 2

HORSES CREEK BASIN USGS: 11-4601.6 HORSES CREEK AT BOLINAS, CALIF. DWR:

~lQ~.--LAT 37 55 9, LONG 122 40 9, SEC. o, T.O , R.O IN LAS BAULINES GRANT ON RIGHT BANK AT MOUTH, 7 FT UPSTREAM FROM CULVERT ON STATE HIGHWAY 1 AND 1.0 MILE NORTHEAST OF BOLINAS, MARIN COUNTY. ALlllUDf_Df_GAGf·--4 FT ABOVE MEAN SEA LEVEL. Q&A~AGE-!&EA·--0.700 SQ. HI. ~Q&Di_!~!lLAaLE.--11 PERIODIC OBSERVATiONS FROM MAY 1967 THROUGH HAY 1968. NO CONTINUOUS RECORDS. ~&Gf-lllS~GE.-- &f!A&lS.--REGULATION OF FLOW NOT SIGNIFICANT. Ul&f!ES.--PERIOOIC DATA: MAXIMUM 21 DEG. C, AUG. 10, 1967 MINIMUM = 9 DEG. c, JAN. 30, 1968

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD DL&f~D&Il ~ w~ Of~ J!th Efll... !SA&& Ae&& !SAY .J1mf J.UU AWia iff& 1967-6B MAXIMUM: ** •• •• 9 12 13 16 17 13 14 21 MEAN: 9 12 13 16 16 l3 14 •• MINIMUM: •• •• •• 21 •• ** ** •• 9 12 13 16 15 13 14 21 DAYS OF RECORD: 0 0 0 1 1 1 1 2 3 1 1 ••0

AUDUBON CREEK BASIN USGS: 11-4601.65 AUDUBON CREEK NEAR BOLINAS, CALIF. DWR:

~&llQH.--LAT 37 55 47, LONG 122 40 50, SEC. O, T.O , R.O IN LAS BAULINES GRANT, AT MOUTH 1.5 MILES NORTH OF BOLINAS, MARIN COUNTY. AJ.IUUQE-Df_GAGE. -­ D&&IK&GLA&fA·--0.460 SQ. MI. ~S-A~lLAaLE.--17 PERIODIC OBSERVATIONS FROM MAY 1967 THROUGH OCTOBER 1968. NO CONTINUOUS RECORDS. Uf&AGE-IllS~ti&&Gf.-- &f!&&KS.--REGULATION OF FLOW NOT SIGNIFICANT. ~.--PERIODIC DATA: MAXIMUM ~ 22 DEG. C, AUG. 10, 1967 MINIMUM = 3 DEG. C, DEC. 13, 1967

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD Qf_Rf~ OC.L. w~ Q~ JAth Efll... !!!&. Ae&& .!!AX .J1mf .JUU AUG& iff& 1967-69 MAXIMUM: 19 17 3 9 ** 14 14 17 13 15 22 19 MEAN: 1B 17 3 9 •• 14 14 16 12 14 22 17 MINIMUM: 1B 17 3 9 14 14 14 11 14 22 16 DAYS OF RECORD: 2 1 1 2 **0 1 1 2 2 2 1 2

35 PINE CREEK BASIN USGS: 11-4601.7 PINE CREEK AT BOLINAS, CALIF. DWR:

LQ~AllQ~.--LAT 37 55 7, LONG 122 41 31, SEC. o, T.O , R.O IN LAS BAULINES GRANT, ON RIGHT RANK 100 FT UPSTREAM FROM HIGHWAY BRIDGE, 0.4 MILE UPSTREAM FROM MOUTH, AND 0.9 MILE NORTH OF BOLINAS, MARIN COU"lTY. ALlllUQf_QE._GAG.E.--6 FT ABOVE MEAN SEA LEVEL. OBAl~A&f_l!.RfA·--7.83 SQ. MI. Bf~QBO~-A~AlLA6Lf.--14 PERIODIC OBSERVATIONS FROM SEPTEMBER 1967 THROUGH SEPTEMBER 1968. CONTINUOUS RECORD FROM OCTOBER 1966 THROUGH SEPTEMBER 1968. A~.EBAGf_Ol~~tlABG.E.-- B.EMAB~~.--REGULATION OF FLOW NOT SIGNIFICANT. f~IBEMES.--CONTINUOUS DATA: MAXIMUM = 16 DEG. C, MAY 18, 1967, JULY 27, 1967, JULY 31, 1967 MINIMUM = 4 DEG. C, DEC. 14, 1968 PERIODIC DATA: MAXIMUM 16 DEG. C, SEP. 3, 1968 MINIMUM = 6 DEG. C, DEC. 13, 1967

WATER TEMPERATURES FROM ONCE DAILY DATA, DEGREES CELSIUS

YEAB D~I ... NO~ ... Q.E~ ... .J.Atja. E.Ea ... HAl!. a. A£Ba. MAY .J.Uillf JlJU AU&a. Sffa. 1967 MAXIMUM: ** ** ** ** ** ** ** 18 16 18 17 17 MEAN: ** ** ** ** ** ** ** 14 13 16 16 16 MINIMUM: ** ** ** ** ** ** ** 12 12 14 14 15 1968 MAXIMUM: 16 15 11 10 15 14 14 l7 16 17 16 17 MEAN: 15 12 7 8 11 12 13 14 15 15 15 15 MINIMUM: 14 9 4 8 11 11 12 13 14 14 13

1967- MAXIMUM: 16 15 11 10 15 14 14 18 16 18 17 17 1966 MEAN: 15 12 7 8 11 12 13 14 14 16 16 16 MINIMUM: 14 9 4 6 8 11 11 12 12 14 14 13 DAYS OF RECORD: 9 21 31 31 29 31 11 14 20 20 15 18

W.IITER Tt:MPERA TURE S FROM PERIODIC DATA, DEGREES CELSIUS PERIOD lJE._BfC.URQ QC.Ia. ~a~ ... O.EC. ... JAti ... EEtl.o. MAR ... AfB.a. MAY JlJf:l.E JULY AlJG.o. .S.E.e... 1967-68 MAXIMUM: 14 14 6 9 12 13 13 15 15 14 ** 16 MFAN: 14 14 6 8 12 13 13 15 15 14 ** 16 MINIMUM: 14 14 7 12 13 13 15 15 14 ** 15 DAYS OF RECORD: 1 1 2 2 1 1 1 1 1 0 2

LAGUNITAS CREEK BASIN

USGS: 11-4605. .ARROYO NICASIO NEAR POINT REYES STATION, CALIF. owR: E-2-2200

LQC.AllU~.--LAT 38 4 20, LON G 12~ 45 30, SEC. 32, T.3 N, R.8 W, IN NICASI O (BUCKELEW) GRANT, ON LEFT BANK 0.9 MILE UPSTREAM FROM MOUTH AND 2.7 MILES EAST UF POINT REYES STATION, MARIN COUNTY. ALlllUQf_Q[_GA&f.--60 FT ~BOVE MEAN SEA LEVEL. QBAl~A&f_AS.EA·--36.2 SQ. Ml; B.EC.QBQS_l!.~AlLA6lf·--35 PERIODIC OBSERVATIONS FROM AUGUST 1953 THROUGH JUNE 1960. NU CONTINUOUS REC ORDS. A~.EBAGf_QlSC.tiABGE·--40.6 CFS FOR 7 Y~ARS OF RECORD. B.EMAB~S.--~E G ULATION OF FLOW NOT SIGNIFICANT • .E~lBEMfS.--PERIOOIC DATA: MAXIMUM 24 DEG. C, JUNE 17, 1960 MINIMUM = 6 DEG. C, JAN. 10, 1955, JAN. 2, 1957

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS

PI::RIO D DLB.EC.UBU · QC..la. ~Q~ ... QE.C.a. Jl!.l:ia. Eflia. MA&a. Af&a. MAY JU.t:lf JULY AU&a. .s..Ee ... 1'153-60 MAXIMUM: 17 11 12 10 12 13 14 15 24 16 15 ** MEA '-1: 17 11 11 7 9 11 14 l3 19 16 14 ** 9 8 8 13 10 14 14 14 ,.IN! MUM: 17 11 . 3 ** DAYS OF ~ECORD: 1 2 3 4 6 3 2 6 2 0

36 WALKER CREEK BASIN USGS: 11-4607. ARROYO SAUSAL NEAR MARSHALL, CALIF. DWR: F-9-9020

LQ~AllQ~.--LAf 38 9 30, LONG 122 46 55, SWl/4 SEC. 30, T.4 N, R.8 w, IN SOULAJULc IBHACKETTl GRANT, ON LEFT BANK 0.3 MILE UPSTREAM FROM CONFLUENCE WITH SALMON CREEK AND 6.1 MILES EAST OF MARSHALL, MARIN COUNTY. ALlllUQf_QE_~AuE·--220 FT ABOVE MEAN SEA LEYEL. D.B.Al~Akf_AREA.--19.2 so. MI. B.f~QBQ5_AtAlLAULE.-- 7 PERIUOIC OBSERVATIONS FROM MARCH 1959 THROUGH JUNE 1960. NO CONTINUOUS RECORDS. A~fBAGf_Ql5CdABGf.-- BfMABK~.--REGULATION OF FLOW NOT SIGNIFICANT. EXIBEMES.--PERIOOIC DATA: MAXIMUM 31 DEG. c, JUNE 15, 1960 MINIMUM = 6 DEG. C, FEB. 8, 1960

WATI'R TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD !.lLB.ECUBQ ocr ... ~all. ... D.E, ... JAN .. EEk MAB. .. AfB .. MAY JJJ~f .JJJJ.Y Al.lil.a. Sff.a. 1959-60 MAXIMUM: ** ** ** ** 12 18 ** ** 31 ** ** ** MEAN: ** ** ** ** 9 18 ** ** 31 ** ** ** MINIMUM: ** ** ** ** 6 17 ** ** 31 ** ** ** DAYS OF RECORD: 0 0 0 0 4 2 0 0 1 0 0 0

USGS: 11-460B. WALKER CREEK NEAR TOMALES, CALIF. DWR: F-9-9010

LQ~AllQN.--LAT 38 12 35, LONG 122 51 35, NW1/4 SEC. 9, T.4 N, R.9 Wt IN NICASIO GRANT, ON LEFT BANK 1,300 FT UPSTREAM FROM CHILENO CREEK AND 3.5 MILES SOUTHEAST OF TOMALES, MARIN COUNTY. AllllUQE_QE_uAuf.--57 FT ABOVE MEAN SEA LEVEL. D.BAlNAGf_AB.EA·--37.1 SQ. MI. B.f~QB.QS_Ali.AlLA!lLE·--65 PERIODIC OBSERVATIONS FROM JUNE 1959 THROUGH SEPTEMBER 1968. NO CONTINUOUS RECORDS. All.fB.Aut_QlSCtlAB.uE.--37.0 CFS FOR 8 YEARS OF RECORD. B.EMAB.KS·--REGULATION OF FLOW NOT SIGNIFICANT. EXIBEMES·--PERIODIC DATA: MAXIMUM 23 DEG. C, JUNE 15, 1960 MINIMUM = 2 DEG. C, JAN. 15, 1963

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD ULBECUB.D. D. C.I.a. t:lOll..a. Of,._ JAM .. EE!l.o.. MAR ... AfB..o. MAY J.JJJ:jf JUL:! 1959-68 MAXIMUM: 17 15 14 11 14 14 17 20 23 17 23 18 MEAN: 16 13 9 8 10 12 13 16 17 16 19 l7 MINIMUM: 14 12 4 6 8 9 13 14 14 16 16 DAYS OF RECORD: 2 5 ll 6 8 7 4 7 3 2 3

SALMON CREEK BASIN USGS: 11-4609.2 SALMON CREEK AT BODEGA, CALIF. DWR: F-9-9150

LQCAllQ~.--LAT 38 20 54, LONG 122 58 45, SE1/4 SEC. 17, T.6 N, R.10 w, IN tSTERO AMERICANO GRANT, ON LEFT BANK 100 FT UPSTREAM FROM PRIVATE ROAD BRIDGE, 0.3 MILE UPSTREAM FROM UNNAMED TRIBUTARY, AND 0.4 MILE NORTHWEST OF BODEGA, SONOMA COUNTY. AllllUQf_.Qf_G~uE.--81 FT ABOVE MEAN SEA LEVEL. D.B.AlNAGf_A&fA.--15.7 SQ. MI. B.fCU~Qi_Ali.Al~A6LE.--59 PERIODIC OBSERVATIONS FROM OCTOBER 1962 THROUGH SEPTEMBER 1968. CDNriNUOUS RECORD FROM OCTOBER 1963 THROUGH SEPTEMBER 1968. All.fBAuf_QlSC.tl!RuE·--19.7 CFS FOR 5 YEARS OF RECORD. BEMAB.KS.--REGULATION OF FLOW NOT SIGNIFICANT. f~lBEMfS.--CONTINUOUS DATA: MAXIMUM 23 DEG. C, APR. 26, 1965 MINIMUM = 0 DEG. C, DEC. 15, 1965, DEC. 16, 1965, DEC. 17, 1965, DEC. 18, 1965, DEC. 19, 1965 DEC. 20, 1965, DEC. 21, 1965, DEC. 22, 1965, DEC. 23, 1965, DEC. 14, 1967 DEC. 15, 1967, DEC. 16, 1967, DEC. 17, 1967, DEC. 19, 1967, DEC. 20, 1967 DEC. 21, 1967, JAN. 3, 1968, JAN. 4, 1968, JAN. 5, 1968 PERIODIC DATA: MAXIMUM 21 DEG. c, JULY 11, 1967 MINIMUM = 2 DEG. c, DEC. 15, 1967

WATER TEMPERATURES FROM THERMOGRAPH DATA, DEGREES CELSIUS

:i.E AB. uc.r ... I:Hl:i.a. llE~ J.At:l.o. EEk MAR .a. AfB..a. MAY JJJ~f JIJJ.Y Al.lil.o.. ste... 1964 MAXIMUM: 17 l1 11 12 16 18 16 18 17 ** ** ** MEAN: 13 11 6 6 9 11 12 13 14 ** ** ** MINIMUM: 7 5 1 1 4 5 7 7 11 ** ** ** 1965 MAXIMUM: 18 17 15 12 12 17 23 21 19 19 18 ** MEAN: 15 10 9 9 8 11 12 16 16 17 15 ** MINIMUM: 13 2 3 4 7 4 9 12 12 12 **

37 SALMON CREEK BASIN USGS: 11-4609.2.--Continued WATER TEMPERATURES FROM THERMOGRAPH DATA, DEGREES CELSIUS

:YEAR Q'L. !:iUll..o. llE~ .... JA!:i.a. u.a... liAR... Ae&.a. HAY JJ.Llif JUU AU.~ i.Ee.a. 1966 MAXIMUM: ** 16 9 13 17 18 21 22 22 17 ** ** MEAN: ** 10 4 8 11 10 14 16 16 14 ** ** MINIMUM: •• 3 0 1 5 2 B 11 ll 11 ** •• 1967 MAXIMUM: •• 14 12 12 13 14 14 22 22 21 19 19 MEAN: ** 9 9 7 B 9 9 14 16 17 16 14 MINIMUM: •• 3 6 1 3 3 5 11 13 12 11 1968 MAXIMUM: 17 15 11 11 18 18 19 18 17 17 19 17 MEAN: 12 10 5 6 11 10 12 13 13 13 13 14 MINIMUM: 6 3 0 0 3 3 5 7 8 10 9 12

1964- MAXIMUM: 18 17 15 13 18 18 23 22 22 21 19 19 1968 MEAN: 13 10 7 7 9 10 12 14 15 15 15 14 MINIMUM: 6 2 0 0 3 2 3 5 8 10 9 11 DAYS OF RECORD: 56 145 138 143 123 144 150 155 141 88 66 40

PERIOD QLBE~QB.Il Q,I... !:illll..a. llf~ JA!:i .... u.a... liAR .a. AeR.a. liAY Jlllif JULY Allli.a. Sff.a.

1963-68 MAXIMUM: 16 14 13 10 12 13 14 18 20 21 17 16 MEA!II: 14 12 9 8 11 12 13 16 17 16 16 14 MINIMUM: 10 8 2 4 9 8 11 14 15 14 14 12 DAYS OF RECORD: 5 6 10 6 3 6 3 4 6 4 3 3

RUSSIAN RIVER BASIN USGS: ll-4609.4 RUSSIAN RIVER NEAR REDWOOD VALLEY, CALIF. OWR: F-9-1875

LQ~AllQ!:i.--LAT 39 19 10, LONG 123 13 20, NW1/4 SEC. ~o. T.17 N, R.l2 w, ON LEFT BANK 600 FT UPSTREAM FROM ROCKY CREEK AND 3.8 MILES NORTH OF TOWN OF REDWOOD VALLEY, MENDOCINO COUNTY. ALlliU.Qf_QE_GAGE.--800 FT ABOVE MEAN SEA LEVEL. ORAl!:iAGf_ABEA·--14.1 SQ. MI. Bf~QB.ll~-Al/.AlLAaLE·--36 PERIODIC OBSERVATIONS FROM AUGUST 1963 THROUGH JUNE 1968. NO CONTINUOUS RECORDS. A~fBAGE_Ill~~tlABGE.-- RfHAB~S.--REGULATION OF FLOW NOT SIGNIFICANT. fXIREHES·--PERIODIC DATA: MAXIMUM 24 DEG. Ct JUNE 13, 1968 MINIMUM = 3 DEG. C, JAN. 14, 1964

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QLBE~URil uu... !:iQll. .... llE.~ JAtia. EE.a ... tsAR .a. AeR.a. liAY JJ..llif JULY AUG.a. S.Ee.a. 1963-6B MAXIMUM: ** 17 10 9 13 15 19 18 24 21 22 21 MEAN: •• 14 7 7 9 9 14 16 19 19 22 21 MINIMUM: ** 12 4 3 4 6 7 14 15 17 22 21 DAYS OF RECORD: 0 2 5 3 5 4 4 4 5 2 1 1

USGS: ll-4610. RUSSIAN RIVER NEAR UKIAH, CALIF. DWR: F-9-1850

LO~AllQti.--LAT 39 12 7, LONG 123 11 55, SEl/4NW1/4 SEC.33, T.16 N, R.12 W, IN YOKAYO RANCHO GRANT, ON LEFT BANK 200 FT DOWNSTREAM FROM YORK CREEK, 0.7 MILE UPSTREAM FROM EAST FORK, AND 3.6 HILES NORTH OF UKIAH, MENDOCINO COUNTY. ALlliU.Ilf_QE_GAGf.--612 FT ABOVE MEAN SEA LEVEL. URAltiAGE._AB.fA·--99.7 SQ. MI. Rf~QBUS_Al/.AlLAaLE..--229 PERIODIC OBSERVATIONS FROM MAY 1951 THROUGH SEPTEMBER 1968. CONTINUOUS RECORD FROM OCTOBER 1964 THROUGH SEPTEMBER 1968. ~fBAGf_llli~tlAB.GE.--173 CFS . FOR 17 YEARS OF RECORD. RE.HAB~S.--REGULATION OF FLOW NOT SIGNIFICANT. E.!1RE.HE.S.--CONTINUOUS DATA: MAXIMUM = 31 DEG. c, JULY 12, 1967 MINIMUM = 3 DEG. c, JAN. 5, 1968 PF.RIOOIC DATA: MAXIMUM 31 DEG. c, JULY 12, 1954 MINIMUM = 4 OEG. c, DEC. 27, 1956

WATER TEMPERATURES FROM ONCE DAILY DATA, DEGREES CELSIUS

lfAR Q~l .. ~Ill/. ... Uf~a. JAN.a. ua.. liAR... AeR.a. liAY JUtif JULY A~ S.E.f.a. 1965 MAXIMUM: •• 12 12 10 10 12 15 24 25 27 27 26 MEAN: 11 10 9 9 11 12 MINIMUM: ** 14 22 24 26 25 •• 7 7 7 8 9 11 11 20 22 26 24

38 RUSSIAN RIVER BASIN USGS: 11-4610.-- Continued

WATER TEMPERATURES FROM ONCE DAILY DATA, DEGRE~S CELSIUS

~ 19<'>6 MAXIMUM: 24 18 1 3 9 9 14 17 24 26 26 27 27 MEAN: 21 12 11 9 8 9 15 21 24 25 26 26 MINIMUM: 19 ll 9 9 7 8 12 16 23 21 26 25

1967 MAXIMUM: 21 19 12 12 13 13 12 26 26 31 29 29 MEAN: 19 14 10 8 ll 10 10 20 21 26 26 26 I-IlN I MUM: 18 9 8 8 7 15 14 22 18 21

1963 MAXIMUM: 23 ?0 12 12 16 16 21 25 15 22 22 29 I'[AN: 21 14 8 8 12 12 15 18 15 22 22 29 MINIMUM: 18 8 4 3 7 8 11 13 15 22 22 29

l'-165- MAXIMUM: 24 20 13 12 16 16 21 26 26 31 29 29 1968 ME:AN: 20 13 10 9 10 11 13 18 21 24 25 27 MINIMUM: 18 7 4 3 7 8 7 11 14 21 18 21 DAYS OF RECORD: 30 74 91 99 79 88 81 53 32 28 29 27

WATER TEMPERATURES FROM PFRIODIC DATA, DEGREFS CELSIUS

PER. IUD ULBEC.iJBil

1951-68 MAXIMUM: 23 16 12 17 15 18 21 25 3l 31 30 29 MEAN: 19 13 9 9 11 12 15 18 22 23 24 22 I'IINIMUM: 13 1D 4 6 6 7 10 13 15 12 17 16 Oo\YS OF ~!'CORD: 16 16 20 29 19 17 19 21 20 18 16 18

USGS: 11-4615. EAST FORK RUSSIAN RIVER NEAR CALPELLA, CALIF. DWR: F-9-4200 RUSSIAN RIVER EAST FORK NEAR CALPELLA.

~OC.AllQ~.--LAT 39 14 48, LONG 123 7 45, NW1/4 SEC. 18, T.16 N, R.11 W, ON LEFT B~~K 0.1 MILE DOWNSTREAM FROM COLD CR.EEK AND 3.9 MILES EAST OF CALPELLA, MENDOCINO COUNTY. A~lllUQE_QE_GAGE.--788 FT ABOVf MEAN SEA LEVEL. UBAl~A~E-A~fA.--92.2 so. MI. BEC.UBQS_A~Al~AfiLE.--326 PERIODIC OBSERVATIONS FROM JANUARY 1950 THROUGH'.SEPTEMBER 1968. CONTINUOUS RECORD FROM OCTOBER 1963 THROUGH SEPTEMBER 1968. AYEBAGf_QlSC.UABG£.--334 CFS FOR 26 YEARS OF RECORD. BfMABlS.--SIGNIFICANT ~EGULATION OF FLOW BEGAN I~ 1900. PRIOR TO ~PRIL 6, 1966, AT SITE 0.4 MILE DOWNSTREAM. f~IBEMfS.--C~NTINUOUS DATA: MAXIMUM = 26 DEG. C, JUNE 19, 1968 MINIMUM= 4 DEG. c, DEC. 16, 1965, OEC. 17, 1965, DEC. 18, 1965, DEC. 19, 1965, DEC. 20, 1965 PERIODIC llATA: MAXIMUM 25 OEG. C, AUG. 4, 1952, SEP. 14, 1953, JULY 12, 1954 MINIMUM = 3 OEG. C, JAN. 13, 1950

WATER TEMPERATURES FROM ONCE DAILY DATA, DEGREES CELSIUS

Y.EAB

1964 MAXIMUM: ** ** ** ** ** 13 17 19 23 24 23 23 MEAN: ** ** ** ** ** 11 14 16 19 21 21 19 Ml NI MUM: ** ** ** ** ** 7 9 14 14 19 17 16 1965 MAXIMUM: 21 16 12 7 15 15 16 19 22 24 22 ** MEAN: 18 11 9 7 11 13 12 16 19 21 20 ** MINIMUM: 14 8 6 7 6 9 9 13 15 16 18 ** 1967 MAXIMUM: ** ** ** ll ** ** ** 18 13 ** 23 22 MEAN: ** ** ** 8 ** ** ** 14 12 ** 22 22 MINIMUM: ** ** ** 6 ** ** ** 11 11 •• 20 21 1968 MAXIMUM: l7 17 9 9 14 13 17 ** ** ** ** ** MEAN: 16 13 7 7 11 11 13 ** ** ** ** •• MINIMUM: 14 9 4 4 7 9 11 ** •• ** •• ••

1964- 1968 MAXIMUM: 21 17 12 11 15 15 17 19 23 24 23 23 MEAN: 17 12 8 7 11 12 13 15 17 21 21 21 MINIMUM: 14 8 4 4 6 7 9 11 11 16 17 16 DAYS OF RECORD: 15 33 36 40 45 78 49 51 42 42 28 29

39 RUSSIAN RIVER BASIN USGS: 11-4615.--Continued

WATER TEMPERATURES FROM THERMOGRAPH DATA, DEGREES CELSIUS

1965 MAXIMUM: ** ** ** ** ** •• ** ** •• ** 22 22 MEAN: ** ** ** •• ** •• •• •• •• •• 20 19 MINIMUM: ** ** ** ** •• •• ** •• •• ** 18 16 1966 MAXIMUM: 19 14 10 ll 11 14 14 21 24 23 23 23 MEAN: 16 11 1 1 8 10 13 16 18 19 20 20 MINIMUM: 13 1 4 4 b 1 10 13 13 14 16 18

1967 MAXIMUM: 20 15 10 9 10 9 9 11 15 18 18 •• MEAN: 17 10 8 9 9 8 8 10 14 17 18 ** MINIMUM: 14 5 b 9 9 6 6 9 14 14 17 **

1968 MAXIMUM: ** ** ** •• ** ** 19 23 26 24 25 23 MEAN: ** ** ** ** ** •• 11 17 20 19 19 21 MINIMUM: ** ** ** ** ** ** 15 13 16 16 15 17

1965- 1968 MAXIMUM: 20 15 10 11 11 14 19 23 26 24 25 23 MEAN: 11 11 8 8 9 9 13 14 11 18 19 20 MINIMUM: 13 5 4 4 b 6 6 9 13 14 15 16 DAYS OF RECORD: 60 55 59 32 56 62 62 11 84 93 85 90

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS

PERIOD QLBE~QBU

1950-68 MAXIMUM: 21 16 12 l3 13 13 17 18 22 25 25 25 MEAN: 17 12 1 1 8 9 12 14 18 21 20 21 MINIMUM: 12 8 4 3 4 4 1 10 13 15 17 16 DAYS OF RECORD: 24 28 40 35 3l 24 31 25 22 19 22 25

USGS: 11-4620. EAST FORK RUSSIAN RIVER NEAR UKIAH, CALIF. DWR: F-9-4100 RUSSIAN RIVER EAST FORK NEAR UKIAH.

LQ,Al1Q~.--LAT 39 11 45, LONG 123 ll 30, NEl/4SEl/4 SEC.33, T.lb N, R.12 W, I~ YOKAYO ~ANCHU GRANT, ON RIGHT BANK OF OUTLET CHANNEL, 500 FT DOWNSTREAM FROM COYOTE DAM, 1,300 FT UPSTREAM FROM MOUTH, AND 3.2 MILES NORTHEAST OF UKIAH, MENDOCINO COUNTY. ALlllUQE_QE_GAGE·--614 FT ABOVE MEAN SEA LEVEL. QBAl~A~E-ABf.A.--105 SQ. MI. Bf.,Q~Q~-A~AlLAaLE·--178 PERIODIC OBSERVATIONS FROM SEPTEMBER 1951 THROUGH SEPTEMBER 1968. CONTINUOUS RECORD FROM OCTOBE~ 1952 THROUGH SEPTEMBER 1967. A~f.&AGE_QlS,~ABGE.--332 CFS FOR 16 YEARS OF RECORD. RfHAB~S.--SIGNIFICANT REGULATION Of FLOW BEGAN NOVEMBER 1958. f.~lBf.Hf.S.--C U NTINUOUS DATA: MAXIMUM = 24 DEG. C, AUG. 9, 1953, SEP. 3, 1953, SEP. 10, 1953 MINIMUM = 3 OEG. C, JAN. 3, 1955 Pt~IODIC DATA: MAXIMUM 24 DEG. C, AUG. 2, 1954 MINIMUM = 4 DEG. C, MAR. 25, 1964

WATER TEMPERATURES FROM ONCE DAILY DATA, DEGREES CELSIUS

'ifAB

1953 MAXIMUM: ** ** 53 57 55 51 56 62 61 65 75 75 MEAN: ** ** 48 50 49 48 52 55 59 62 66 68 MINIMUM: ** ** 45 42 44 44 45 48 52 59 60 63

1954 MAXIMUM: 65 55 55 50 55 52 62 61 68 68 68 65 MEAN: 59 52 45 45 47 48 54 56 60 64 63 61 MINIMUM: 53 48 40 40 42 45 46 54 54 62 61 58 1955 MAXIMUM: 60 58 50 45 46 55 ** ** •• .. •• ** MEAN: 59 50 45 41 41 46 ** ** ** ** ** ** MINIMUM: 52 44 39 37 38 39 ** ** ** ** ** ••

1'1 .53- MAXIMUM: 65 58 55 57 55 55 62 62 68 68 75 75 1955 MEAN: 59 51 46 45 46 47 53 56 60 63 65 65 MINIMUM: 52 44 39 37 38 39 45 48 52 59 60 58 flAYS OF RECORD: 23 41 83 93 84 93 55 62 60 29 21 18

40 RUSSIAN RIVER BASIN

USGS: 11-4620.--Continued

WATER TEMPERATURES FROM ONCE DAILY DATA, DEGREES CELSIUS

YEA& !J~I ... .t:HJll ... Qf~ ... JA~ ... Ef.a... .MAR ... AI! B... .MAY JU.t:lf .JUJ...Y AUG ... .SEe ... lq6o MAXIMUM: ** ** ** ** ** ** ** •• ** ** ** ** MEAN: ** ** ** ** ** ** ** ** ** ** ** ** MINIMUM: ** ** ** ** ** ** ** ** ** ** ** ** 1965 MAXIMUM: 19 16 12 10 10 11 13 14 16 16 18 MEAN: 17 12 10 9 9 9 1 1 13 14 14 15 MINIMUM: 15 11 9 9 8 8 10 11 13 14 14 19.66 MAXIMUM: 18 17 14 10 9 10 11 12 13 18 21 MEAN: 17 15 11 9 8 9 10 11 13 16 18 MINIMUM: 14 12 7 8 8 8 9 10 11 13 17

1967 MAXIMUM: 20 19 13 13 10 11 9 14 13 14 19 21 MEAN: 18 14 11 9 9 9 9 12 12 13 17 18 MINIMUM: 16 12 10 7 4 9 8 9 ll 12 14 17 1968 MAXIMUM: 19 19 13 9 10 11 12 13 12 12 16 19 MEAN: 18 16 10 e 8 9 12 11 12 12 16 19 MINIMUM: 16 13 6 6 7 8 10 9 11 12 16 19

1960- 1968 MAXIMUM: 20 19 14 13 10 11 12 14 14 16 19 21 MEAN: 18 14 11 9 9 9 10 11 12 13 16 18 MINIMUM: 14 11 6 6 4 8 8 9 10 11 13 14 DAYS OF RECORD: 48 81 91 96 84 93 82 60 36 29 31 29

WATER TEMPERATURES FROM THERMOGRAPH DATA, DEGREES CELSIUS

YEAB !JU.a. ~Qll ... QEC. ... JA~ Effl. ... .MAR. ... Al!R.a. .MAY JlJljf JULY AUG .a. .sf e... 1967 MAXIMUM: 20 15 10 9 10 9 9 11 15 18 18 ** MEAN: l7 10 8 9 9 8 8 10 14 17 18 ** MINIMUM: 14 6 9 9 6 6 9 14 14 17 **

1967 MAXIMUM: 20 15 10 9 10 9 9 11 15 18 18 ** MEAN: 17 10 8 9 9 8 8 10 14 17 18 •• MINIMUM: 14 5 6 9 9 6 6 9 14 14 17 ** DAYS OF RECORD: 31 30 28 1 28 31 30 9 24 31 8 0

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QLRfC.!J&Q !JC.Ia ~Qll ... UfC.a .lAMa. EEB. ... MR ... AfR.a. .MAY JlJljf JULY AU!i.o. .Sff.o. 1951-59 MAXIMUM: 21 13 10 16 lD 12 14 20 19 21 24 22 MEAN: 16 11 9 9 9 9 12 14 17 19 21 19 MINIMUM: 13 10 6 6 1 1 9 9 11 14 18 17 DAYS OF RECORD: 8 3 6 14 5 5 7 6 6 5 3 5 1960-68 MAXIMUM: 20 19 12 9 9 10 12 14 13 16 19 20 MEAN: 17 16 10 8 8 8 10 11 12 13 16 18 MINIMUM: 15 10 1 6 1 4 9 9 10 11 13 16 DAYS OF RECORD: 6 6 16 12 11 1 1 9 9 1 8 1 RUSSIAN RIVER BASIN US GS: 11-4625. RUSSIAN RIVER NEAR HOPLAND, CAliF. OWR: F-9-1765

LO~AllQ~.--LAT 39 1 35, LONG 123 7 45, NE1/4SW1/4 SEC.36, T.14 N, R.12 w, IN RANCHO DE SANEL GRANT, ON RIGHT BANK AT ABANDONED HIGHWAY BRIDGE, 0.2 MILE DOWNSTREAM FROM MCNAB CREEK, 4 MILES NORTH OF HOPLAND, AND 17 MILES UPSTREAM FROM SULPHUR CREEK, MENDOCINO COUNTY. ALlliUQE _ Qf_~l~f.--498 FT ABOVE MEA~ SEA LEVEL. OBAI~IGE_AREA·--362 SQ. MI. Rf~QBQS_A~IlLAaLf. - -319 PERI ODIC OBSERVATIONS FROM FEBRUARY 1950 THROUGH SEPTEMBER 1968. CONTINUOUS RECO RD FROM OCTOBER 1964 THROUGH SEPTEMBER 1968. A~fBA~E-QlS~tlAB~E.--712 CFS FOR 28 YEARS OF RECORD. BfMAB~S.--SI G NIFICANT REGULATION OF FLOW BEGAN NOVEMBER 1958. fX!BfMfS.--CONTINUOUS DATA: MAXIMUM = 26 DEG. c, SEP. 17, 1968 MINIMUM = 6 DEG. c, FEB. a, 1966, FEB. 9, 1966 PERIODIC DATA: MAXIMUM 29 DEG. c, JULY 12, 1954 MI NIMUM = 4 DEG. c, MAR. 24, 1964

WATER TEMPERATURES FROM THERMOGRAPH DATA, DEGREES CELSIUS

::!fAR Q~la. 1::10~ .. Qf~a. JAflla. Eflla. .t!ABa. AfRa. .t!AY JU!::If JUU AU .Ga. llf.a. 1965 MAXIMUM: •• •• •• •• •• •• •• •• •• •• •• 20 MEAN : •• •• •• •• •• •• •• •• •• •• •• 17 MINIMUM: •• •• •• •• •• •• •• •• •• •• •• 13 1966 MAXIMUM: 21 18 12 9 9 10 12 12 22 21 22 22 MEAN: 17 14 9 8 B 8 ll 12 17 17 19 19 MINIMUM: 14 11 7 7 6 7 9 ll 13 14 16 16 1967 MAXIMUM: 21 17 13 11 14 15 12 1B 17 20 •• 21 MEAN: 17 14 12 9 ll ll 9 14 15 19 •• 19 MINIMUM: 11 11 10 8 8 B 7 10 12 17 •• 17 1968 MAXIMUM: 21 18 12 11 14 13 12 •• •• •• •• 26 MEAN: 18 16 ·10 9 12 10 12 •• •• •• •• 20 MINIMUM: 16 12 8 7 9 8 11 •• •• •• •• 17

1965- 1968 MAXIMUM: 21 1B 13 11 14 15 12 18 22 21 22 26 MEAN: 17 15 10 9 10 10 11 13 16 18 19 19 MINIMUM: 11 11 7 7 6 7 7 10 12 14 16 13 DAYS OF RECORD: 85 90 93 93 7B 89 65 24 37 43 25 96

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QL&f~ORil au... !::lOll a. ~ ... JAti.a. Efll.a. .t!A&.a. AfR.a. .t!Al JlJ!::If JlJL.l AlJ.G.a. llf..a. 1950-59 MAXIMUM: 23 25 13 14 14 12 18 22 24 29 25 27 MEAN: 18 14 10 9 9 10 14 17 19 23 23 21 MINIMUM: 14 11 7 7 7 8 11 13 16 18 17 17 DAYS OF RECORD: 16 8 12 14 11 13 u 15 13 15 12 14 1960-68 MAXIMUM: 21 18 13 11 13 12 17 21 22 22 22 22 MEAN: 18 14 10 9 10 10 13 16 18 18 18 19 MINIMUM: 15 10 8 6 6 4 9 11 15 14 14 17 OAYS OF RECORD: 12 15 11 13 15 14 12 19 13 14 13 12

USGS: 11-4627. FELIZ CREEK NEAR HOPLAND, CALIF. DWR: F-9-1730

LO~AllQ~.--LAT 38 58 20, LONG 123 8 30, SE1/4NE1/4 SEC. 23, T.13 N, R.12 w. IN RANCHO DE SANEL GRANT, ON LEFT BANK JUST UPSTREAM FROM COUNTY ROAD BRIDGE, 0.1 MILE UPSTREAM FROM JOHNSON CREEK, AND 1.4 MILES WEST OF HOPLAND, MENDOCINO COUNTY. ALlllUQf_Qf_GA.Gf.--507 FT ABOVE MEAN SEA LEVEL. QBAl!::IA.Gf_ABfA.--31.1 SQ. MI. Rf~OBQS_A~AlLAilLE·--54 PERIODIC OBSERVATIONS FROM DECEMBER 1958 THROUGH JUNE 1966. NO CONTINUOUS RECORDS. A~fRA~f-lllS~tlAR.Gf.--46.5 CFS FOR B YEARS OF RECORD. &f.t!AR~S.--REGULATION OF FLOW NOT SIGNIFICANT. STATION DISCONTINUED SEPT. 1966. fl!Bf.t!fS.--PERIODIC DATA: MAXIMUM 28 DEG. C, JULY 6, 1960, JUNE 21, 1962, JULY 28, 1965 MINIMUM = 2 DEG. C, DEC. 18, 1965 WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD llLRf~llRQ ~ ... fllll~ Q~ JAtia. Efll.a. .t!AR.a. AeB.a. .t!Al Jl.Wf JW.l AU.G.a. llf..a. 1959-66 MAXIMUM: 18 13 12 10 12 11 20 21 28 28 25 ... MEAN: 18 11 8 8 9 9 16 17 24 24 24 •• MINIMUM: 18 9 2 7 7 8 12 12 18 18 24 •• DAYS OF RECORD: 1 5 7 7 8 6 2 7 5 4 2 0

42 RUSSIAN RIVER BASIN

USGS: 11-4630. RUSSIAN RIVER NEAR CLOVERDALE, CALIF. OwR: F-9-1680

LQ,AllQ~.--LAT 38 52 55, LONG 123 3 15, SW1/4 SEC. 14, T.12 N, R.11 w, ON LEFT BANK AT LAMBERT RANCH, 400 FT DOWNSTREAM FROM CUMMISKY CREEK AND 5 MILES NORTHWEST OF CLOVERDALE, MENDOCINO COUNTY. ALI!IUQf_Qf_G!Gf.--374 FT ABOVE MEAN SEA LEVEL. QRA!~AGf_A&fA.--502 SQ. MI. Rf'Q&Q~-~~~lLA6LE·--176 PERIODIC OBSERVATIONS FROM SEPTEMBER 1951 THROUGH SEPTEMBER 1968. CONTINUOUS RECORD FROM OCTOBER 1963 THROUGH SEPTEMBER 1968. A~f&AGE_Q1SktlA&Gf.--984 CFS FOR 16 YEARS OF RECORD. &fMA&KS.--SIGNIFICANT REGULATION OF FLOW BEGAN NOVEMBER 1958. f~IREMfS.--CONTINUOUS DATA: MAXIMUM = 26 OEG. C, MAY 2B, 1968, JULY 24, 1964, AUG. 24, 1964 MINIMUM = 4 DEG. C, JAN. 12, 1968 PERIODIC DATA: MAXIMUM 25 DEG. C, JULY 18, 1956 MINIMUM = 6 DF.G. C, JAN. 12, 1955, DEC. 31, 1956, MAR. 13, 1967

WATER TEMPERATURES FROM ONCE DAILY DATA, DEGREES CELSIUS

HA& 1964 MAXIMUM: ** 13 1 8 15 20 24 25 26 26 23 MEAN: ** 13 1 8 12 16 19 21 24 23 22 MINIMUM: ** 13 7 8 1 11 16 16 22 22 19 1966 MAXIMUM: 20 17 12 13 ** •• •• ** •• ** ** ** MEAN: 18 14 9 9 •• •• •• •• •• ** • • •• MINIMUM: 17 11 7 6 •• •• •• •• •• •• ** ** 1967 MAXIMUM: ** ** •• •• ** •• •• 21 15 ** ** ** MEAN: ** •• ** •• •• •• •• 19 14 •• ** ** MINIMUM: ** •• •• ** •• •• •• 15 12 •• •• •• 1968 MAXIMUM: ** 9 11 10 14 14 16 ** ** •• •• •• MEAN: ** 9 9 7 10 11 13 ** •• ** •• •• MINIMUM: ** 9 8 4 6 8 11 ** •• •• •• ••

1964- 1968 MAXIMUM: 20 17 12 13 14 15 20 24 25 26 26 23 MEAN: 18 12 9 8 9 12 15 19 18 24 23 22 MINIMUM: 17 9 7 4 6 . 1 11 15 12 22 22 19 DAYS OF RECORD: 9 19 21 41 20 33 22 20 15 14 12 14

WATER TEMPERATURES FROM THERMOGRAPH DATA, DEGREES CELSIUS

YfAB 1965 MAXIMUM: ** 12 13 13 11 14 18 21 23 24 22 20 MEAN: •• 10 10 11 9 11 12 16 19 21 19 18 MINIMUM: •• 8 7 8 7 8 7 11 14 18 16 16 1966 MAXIMUM: 20 •• 10 12 17 19 19 22 18 20 22 MFAN: 19 •• 8 10 12 16 16 18 17 18 19 MINIMUM: 17 ** 1 7 14 13 14 14 15 17 1967 MAXIMUM: 20 17 13 11 12 13 11 16 22 23 21 21 MEAN: 17 14 11 9 9 10 9 12 18 20 19 19 MINIMUM: 14 11 7 7 7 7 7 8 12 17 17 16

1968 MAXIMUM: 21 18 10 9 •• •• 21 26 24 23 23 23 MEAN: 18 15 8 8 •• ** 16 20 21 21 20 20 MINIMUM: 17 11 6 6 •• ** 12 15 17 18 17 16

1965- 1968 MAXIMUM: 21 18 13 13 12 17 21 26 24 24 23 23 MEAN: 18 13 9 9 9 11 13 16 19 20 19 19 MI Nl MUM: 14 8 6 6 7 7 7 8 12 14 15 16 DAYS UF RECORD: 60 71 80 74 84 89 107 88 109 91 116 120

43 RUSSIAN RIVER BASIN USGS: 11-4630.--Continued

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOO QL!UJ~IJB.Q l.Jc.I ... fillY ... Qf.C ... JAti.a. Ef.ll.a. .l:lA.B.a. Aea... MAY JUtiE JULY AU.G.a. .sEe... 1951-59 MAXIMUM: 17 15 12 12 9 12 17 18 24 25 22 22 MEA N: 14 14 9 9 9 10 13 15 21 22 21 21 MINIMUM: 12 13 6 6 9 7 11 13 18 20 20 19 DAYS OF REC ORD: 6 3 5 7 1 3 5 5 5 6 5 5 1960-68 MAXIMUM: 19 16 12 12 10 14 16 18 22 23 23 23 MEA N: 17 13 9 9 9 11 12 15 18 19 19 19 MINIMUM: 15 11 7 7 8 6 9 11 l3 17 18 16 flAYS OF RECORD: 7 11 14 18 10 12 11 8 8 8 7 6

US GS: 11-4632. BIG SULPHUR CREEK NEAR CLOVERDALE, CALIF. DWR: F-9-1600

LQCAI1Qbl.--LAT 33 4CJ ;u, LON G 122 59 7' SW1/4SW1/4 SEC.4, T.11 N, R.10 w, ON q ( GHT 13 ANK D.5 MIL E OO WNS TP. EA M FR 0 ~1 UNNAMED TRIBUTARY, 1.9 MILES UPST KEAM FRUM MO UTH, AN D 2. 0 MILES NO RTHFAST OF CLOVERDALE, SONOMA' COUNTY. ALllllJQf._Qf_~A~f.--3 9 3 FT ABl1V f: MEAN SEA LEVEL. Q.BAltiA~E-AB.E~.-- 8 2.1 SQ. MI. BECQBQ~-A~AlL!tlLf.--132 PERI ODIC OBSERVATIONS FROM JULY 1957 THROUGH SEPTEMBER 1968. CONTI NUOUS RECO RD FROM OCTOBER 1966 THROUGH SEPTEMBER 1968. A~f.BAGf_Ql~Cti!.BG£.--190 CFS FOR 10 YEARS OF RECORD • .BEMAB.~S.-- R E G ULATI O N OF FLOW NOT SIGNIFICANT. f!l.Bf.l:lf~.- - CUNTI N U O US DATA: MAXIMU M = 27 DEG. c, JULY 12, 1967 MI'III MUM = 3 DEG. c. DEC. 15 . 1968, DEC. 20, 1968, JAN. 3, 1968 PtR IOiliC DATA: MAXI MUM 2 7 DEG. c, AUG. 3, 196 L Ml'liMUM = 4 DEG . c t DEC. 13 t 1967

WATER TEMPERA TUKES FROM ONCE DAILY DATA, DEGREES CELSIUS

YEA B. QCl.a. .t:llJ~ ... QEC.s. J.Ati.a. EEil.a. .l:lAB.a. AeB ... MAY J.U.t:lf JUU AUG ... .sEe... 1967 MAXIMUM: 21 16 12 12 12 13 12 24 27 27 27 24 MEAN: 17 12 10 8 9 10 9 18 19 23 23 22 MINIMUM: 14 8 4 4 8 6 8 10 11 17 18 18

1968 MA XIMUM: 18 17 11 11 13 17 20 15 24 21 24 23 MEAN: 16 12 7 7 11 11 13 15 24 21 24 ?3 MINIMUM: 13 7 3 3 7 8 9 15 24 21 24 23

19 67- M.AX I MUM: 21 17 12 12 13 17 20 24 27 27 27 24 1968 MEA N: 17 1? 9 8 10 11 11 17 22 22 24 23 MINII-'UM: 13 7 3 3 7 6 8 10 11 17 18 18 DAYS UF R.EC ORD: 18 34 45 41 29 24 ?1 15 8 6 7 6

wATER. TEMPE KATURES FROM PtRIOOIC DATA, DEGREES CELSIUS

PFRI OD ULB.E.CuB.Q QCl-. billY ... QE.C ... J!l~ ... Efll.s. MAR-. AeB.a. MAY JU.t:JE J.ULY. AU.G.a. sEe...

1957-68 MAXIMUM: 21 17 12 27 17 16 17 22 24 26 27 25 MEAN: 17 12 8 9 11 11 13 18 19 23 24 22 MI NIMUM: 14 8 4 4 4 4 9 14 11 18 19 19 DAYS OF RECORD: 9 8 12 17 10 12 12 9 11 12 12

US GS: 11-4639. MAACAMA CREEK NEAR KELLOGG, CALIF. DW R: F-9-1520

LQCAilQt:~.--LAT 38 38 25 , LONG 122 45 45, SW1/4 SEC. 9, T.9 N, R.8 w' ON RI GHT tH ;-< K 0.5 MIL E DOWNST REAM FROM REDWOOD CREEK AND 4.4 MILES WEST OF KELL OG G, SON OM A COU"JTY. ALlliUUf_QE_ ~ !Gf.--1 89 FT ~l:llJVE MEAN SEA LEVEL. QBAltlA~E-ABf~.--43.4 S t.~ . ~I. BfCQB.Qi_!l~AlLAliL£.--10 8 PERI ODIC OBSERV ATIONS FROM DECEMBE R 1960 THROUGH AUGUST 1968. NO CO NTI"J UOUS RECORD S. A~fBAGf_QlS~~ABG£.-- 8 5.9 CFS FOR 6 YEARS OF RECORD. Bf.MAB~S.-- REG ULATI ON OF FLOW NOT SIG"JIFICANT. E.XlBEMfS.--P ERIODIC UATA: ~1 AX H'.U ~1 22 OE G. c. JULY: 21, 1964, AUG. !7, 1967 MI NI MUM = 3 OEG. c t DEC. 14, 1967

WATER TEMPERATURES FRO M PE RIODIC DATA, DEGREES CELSIUS

PE:RI OD QLBI:~I.IB. O. QCI ... lll UY.a. UEC.a. J.A~ ... Efll.a. .M.B.a. Ae.B ... MAY. J.Ul::l.E JULY. AU .G ... sE.e ... 1'161-68 I'.AX I MUI-'.: 17 17 14 13 14 17 19 21 21 22 22 18 M E A ; ~: 15 13 9 8 9 11 13 16 18 20 20 16 MI NIM UM : l3 1 1 3 5 6 9 9 12 15 18 18 13 O~YS OF REcrJR D: 9 11 12 10 9 12 7 8 11 8 7 4

44 RUSSIAN RIVER BASI til

USGS: 11 - 4639.4 FRANZ CR EEK NEAR KELLOGG, CALIF. tlwR: F-9-1510

1.Q~ Ii llu[].--L ~ T Vl 36 30 , Ll li'F~ 122 41 35, SE1/4 SEC. 24, T.9 N, R.8 w, J hj MALL ACUMES G'l. t.. -• T, ON LEFT CANK AT DOWNSnEAM SIDE: OF HIGHWAY BRIDGEt 100 FT fl OI

W~ TCR HMPI:-RA TURES fROM PERIODIC DATA, DEGREES CELSIUS

Pt: RI OIJ !.l E_BfC.lS.Q Q~I .. t:H.l~ .. QE~a. JA::ia. fEll. a. MA&.._ A£&., MAY. Jl.ltif JUU AUG.._ .S.f£.._ 1'165-6 8 MI\XI MUM: 17 14 11 10 17 19 20 18 21 21 16 ME A•'i : 15 13 8 8 12 14 17 17 20 2l 16 MI NI MUM: 14 12 4 7 9 10 14 16 19 21 16 01\YS OF REC ORD: 3 4 4 2 4 3 2 1

US GS: 11-4640. RUSSIAN RIVER NFAR HEAL DSBURG, CAll F. DWR: F-9-1500

1.0~AI1Qf1.--L A T 38 16 4 fl , LO NG 122 50 7, SEl/4NEl/4 SEC.22, T.9 N, R.9 w, l'l SGTOYD ~ f:' G'{A 'H, UN LEFT 8M~K 3.5 MIL ES UPSTRI:A M FROM DRY CR!:EK AND 2 MIL f S EAST OF HFALDSBU R':;, SONO MA COUNTY. AllliU Q .E_OE_ ~ A~E·--77 FT AB OVE MEAN SEA LEV~L. UBAl~~~ f _A&EA.--793 SQ. MI. B£'0~12~-A~Al1.Afi1. E .--3 5 Z PF RI DOIC OBSE~VATI ON S FR DM JANUARY 1950 THROUGH AUGUST 1968. CONJI NUOUS :u=cmw FR OM OCTO EER 1965 THROUGH SEPTEMBER 1968. A~.EBAGt_ Q l~~ ~ A~~ E .--1,405 CFS FQD, 28 YEARS OF RECORD. B fMA B ~~.-- S I GN IFICANT REGULI\TION OF FLOW BEGAN NOVEMBER 1958. £AlBEMES.--C OIIITINUOUS DATA: MAXIMUM = 26 fli:'G. c' JUNE 14, 1966, JUNE 15, 1966, JUNE 19, 1966, AUG. 6, 1966, AUG. 7' 1966 JULY 19, 1968 MI-'H MUM = 6 DEG. c, DEC. 21' 1965, DEC. 2 2, 1965, DEC. 23, 1965, JAN. 26, 1966 PERIODIC DATA: MAXI MUM 27 Df G. c' JULY 12' 1954 MIN I I'I U ~~ = 5 DEG. c, JAN. 11. 1950

WA T EP, TEMPE RATURES FROM THERMOGRAPH DATA, DEGREES CELSIUS

UAR QC.la. t:w~ .. QE'a. JAt::la. f_E_fl_.._ MAlia. A£ B.._ MAY. JU!:l£ JULY. A!.! Ga. Sf£ a. 1966 MAXIMUM: 22 17 12 13 11 17 22 ?3 26 26 26 23 MEAN: 20 13 9 9 9 12 17 19 22 23 23 21 Mi l-l ! MUM: 18 6 12 16 17 21 19 17

1967 MAXIMUM: 23 17 14 12 13 13 12 22 23 24 22 22 MI::A N: 17 13 11 11 11 10 16 19 22 21 20 MINIMUM: 12 11 7 9 8 8 11 14 20 19 17

19 &11 MI\XIMU M: 19 I 7 12 12 16 17 21 24 25 26 26 24 ME AN: 16 14 9 9 12 13 16 18 23 23 23 21 MINIMU ,_, : 13 9 7 7 8 11 12 13 20 22 19 15

1'1 66- 1968 MAXIMUM: 23 17 14 13 16 17 22 24 26 26 26 24 ME 4N: 18 13 10 9 11 12 14 18 21 23 22 21 Ml tll !MUM: 12 9 6 8 7 8 11 14 20 19 15 DAYS OF REC ORD: 63 85 '13 93 85 93 72 93 90 93 93 91

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD QLBE,UBQ D.~ I .. tiQ~ ... !lf~ ... JAti .. EEll.a. MAB.a. A£& ... MAY. Jl.l!:JE JULY. Al.l!i.o. .S.f£.._ 1950-59 MAXIMUM: 21 16 13 14 17 14 18 25 24 27 26 26 MEA ·N: 18 14 10 10 11 12 14 18 21 23 23 21 MI NIMUM: 15 10 7 5 7 7 11 14 16 20 19 18 DAYS OF RECORD: 17 12 16 15 11 12 17 15 17 15 12 17 1960-68 M-'I XIMUM: 22 18 13 14 16 15 21 22 25 26 24 26 MEAN: 18 14 11 9 11 12 15 18 21 23 22 22 MI NIMUM: 16 12 1 7 7 9 12 14 16 20 20 18 DAYS OF RECORD: 14 13 15 14 12 17 14 16 18 16 11 14

45 RUSSIAN RIVER BASIN uSGS: 11-4640.5 DRY CREEK TRIBUTARY NEAR HOPLAND, CALIF. OWR: F-9-1640

LO~AllQ~.--LAT 38 53 10, LONG 123 9 15, SEC. 13, T.12 N, R.12 W, ON RIGHT BANK AT CULVE RT ON STATE HIGHWAY NO. 128, 6.5 MILES SOUTHWEST OF HOPLAN D, MEN DOCINO COUNTY. ALI!lUUf_Qf_GAG£.--800 FT ABOVE MEAN SEA LEVEL. UBAl~AGf_ABfA.--1.27 SQ. MI. BECOBO~-A~A!LA!lLE·-- 8 PERIODIC OBSERVATIONS FROM JANUARY 1962 THROUGH MAY 1968. NO CONTI NU OUS RECORD S. A~f&AGE_QlSCtlABGf.-- BfMABK~.-- ~ E G ULATIO N OF FLOW NOT SI GNIFICANT. f~IBfMfS.--P E RIODIC DATA: MAXIMUM 15 DEG. C, MAY 6, 1968 MI NIMUM = 7 DEG. C, JAN. 15, 1962

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS PERIOD IJLBECilBU UCla. ~IJ:i.a. Qt;C... .!A~... Efll.a. MAB.a. Af.B.a. MAY. J!Jti£ .JULY. AU!i.a. llf..a. 196 2-68 MAXIMUM : ** ** 9 12 12 13 ** 15 ** ** ** ** MEA N: ** ** 9 9 12 13 ** 15 ** ** ** ** MI NIM UM: ** ** 9 12 13 •• 15 •• ** ** ** DAY S OF REC ORD: 0 0 1 1 1 0 1 0 0 0 0

USG S: 11-4645. DRY CRE EK NEAR CLOVERDAL€, CALIF. DWR: F-9-1490

LQCAil u~ .--LAT 38 44 59 , LONG 121 5 28, NE1/4NE1/4 SEC.5, T.10 N, R.11 W, ON LEFT BANK 500 FT DO WNS TREAM FRO M SMITH CREEK AND 5 MILES SOUTHWEST OF CLOVERDAL E, SONOM A COUN TY. ALlliU Q f_Qf_ ~ AGf.-- ~ 0 4 FT ARO Vf MEAN SEA LEVEL. OBAl~ A ~ £-A B E A ·-- 8 7. 8 so. MI . BfCUBQS_A:iA!lAf1 lf·- -l 64 PERIODI C OBSERVATIONS FROM JANUARY 1950 THROUGH SEPTEMBER l96B. CONTI NUOUS RECO RD FKOM OCT OBER 1964 THR OUGH SEPTEMBER 1968. A~fBAG f _QlSC tl A B G C . -- 15 6 CFS FOR 26 YEARS OF RECORD. . BEMAB KS.-- RE ~ ULATI UN OF FLOW NO T SIGNIFICA NT. E~IBfMf~.--C U NTII'IU U U S DATA: MAXIMU M = 33 DF G. C, AUG. 6, 1966, AUG. · 7, 1966 "'I NI'MU M = 3 DEG . C, DEC. 17, 1965, DEC. 15, 1967 PERI ODIC DATI\: MAXIMU M 29 DF.G . C, JULY 13, 1956 MINII'U M = 3 DEG. C, DEC. I 5, 1967

WATE R TEMPE RAT URES FROM THERMOGRAPH DATA, DEGREES CELSIUS

I965 MIIXIM UM: ** ** ** ** ** ** ** ** ** ** ** ** MEA N: •• ** ** •• •• ** ** ** ** ** ** ** MINIM UM : •• ** ** •• ** ** ** ** ** ** ** ** 1966 MAX! MUM: 22 18 9 13 13 21 24 26 31 32 33 31 ME AN: 18 14 7 9 9 12 17 20 22 23 24 21 MI NIMUM: 1'; 12 3 5 7 6 12 14 14 17 15 13 1q67 MAXIM UM : 23 17 14 12 13 16 16 27 29 32 30 ** MEAN : 16 14 11 9 11 11 11 18 21 24 24 ** MI NIM UM : 9 q 6 5 7 7 7 9 l3 18 20 **

1968 MAX I MU~ : 26 18 12 11 17 19 23 26 29 28 28 28 MEAN: 18 13 8 8 12 13 16 18 21 23 22 21 MI NIM UM : 13 8 3 3 8 9 10 12 14 17 18 14

1965- MA XI MUM : 26 18 14 13 l7 21 24 27 31 32 33 31 19 68 Mt AN: 17 14 9 l1 12 15 19 21 23 23 21 MI NI MUM: !l 3 7 6 7 9 13 17 15 l3 DAY S OF Rf:C OR O: 68 74 62 93 85 93 89 120 120 124 99 63

WATFR TEMP ER ATURES FROM PERIODIC DATA, DEGREES CELSIUS PE: RI OU IJLP..EC U!l L!

1950-&8 MAXIMUM: 23 18 14 13 16 16 21 21 26 29 27 24 ,.. EAN: 18 13 9 8 11 12 15 17 19 24 23 21 MI NIM UM: 12 11 3 4 6 7 10 l3 15 20 17 18 DA YS OF RE'CORD : ll 11 16 18 16 16 12 13 14 15 12 10

46 KUSSIA N RIVfk BASIN

USGS : 11-46 52. DRY CRffK NEAR GEYSERVILLf, CALIF. DWR: F-9-1440

LQCAllQ ~ .--LA T 3H ~ 1 55, LU NG 122 57 25, NE 1/4SW1/4 SEC.22, T.10 N, R.10 w, I N f lABACI I GR-'INT , ON LEFT t:lANK P lt:R OF BRIDGE, O. 3 MILE DOWNSTREAM FROM PEN4 CREEK AN D 3 MILF S WFS T OF GEYSE k VILL E, SONOMA COUNTY. ALlllU Qf_Q E_ G A~E.--1 ~ ~ FT -'

WATER TEMPERAT UR ES FROM ONCE DAILY DATA, DEGREES CELSIUS

1964 MAXIMUM: ** ** ** ** ** 16 21 23 24 21 ** ** MEAN: ** ** ** ** ** 11 13 14 21 21 ** ** MINIMUM: ** ** ** ** ** 1 9 10 16 21 ** ** 1967 MI\X IMUM: ** 15 14 ** ** ** ** ** ** ** ** ** Me AN: ** 12 13 ** ** ** ** ** ** ** ** ** MI NIMUM: ** 3 12 ** ** ** ** ** ** ** ** ** 196!1 MA XI MUM : ** ** ** ** ** ** ** 22 ** •• ** ** M!: AN: ** ** ** ** ** ** ** 22 ** ** ** ** MINIMUM: ** ** ** ** ** ** ** 21 ** ** ** **

1964- MAXIMUM: ** 15 14 ** ** 16 21 23 24 21 ** ** 1968 ME AN: ** 12 13 ** ** 11 13 18 21 21 ** ** MINIMUM: ** 3 12 ** ** 1 9 10 16 21 ** ** DAY S OF RECORD: 0 12 1 0 0 28 21 17 8 1 0 0

WATER TEMPERATURES FROM THERMOGRAPH DATA, ·DEGREES CELSIUS

1965 MAXIMUM: ** 13 13 13 13 17 20 22 23 24 24 25 MEAN! ** ll 11 9 10 13 13 11 18 20 21 19 MINIMUM: ** 8 1 6 1 8 8 11 14 16 16 14 1966 MAXIMUM: 25 19 11 13 13 11 21 21 24 24 23 22 MEAN: 18 14 8 11 10 12 11 18 20 21 21 19 MINIMUM: 13 9 6 8 1 1 12 14 16 11 18 18 1967 MAXIMUM: ** ** 13 12 13 14 16 24 23 23 22 21 MEAN: ** ** 10 9 11 11 11 17 18 19 19 18 MINIMUM: ** ** 6 1 8 1 8 9 13 14 16 16 1968 MAXIMUM: 21 18 12 12 11 18 22 22 23 22 -22 22 MEAN: 18 16 9 9 13 12 16 17 19 20 20 19 MINIMUM: 15 9 6 6 10 8 11 13 15 17 18 17

19 65- MAXIMUM: 25 19 13 13 17 18 22 24 24 24 24 25 1968 MEAN: 18 14 10 10 11 12 14 17 19 20 20 19 MINIMUM: 13 8 6 6 7 1 8 9 13 14 16 14 DAYS OF RECORD: 62 62 106 123 112 120 108 118 120 84 88 93

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS

PERIOD OLBfCOBQ 1960-68 MAXIMUM: 21 17 13 14 13 17 20 21 21 24 23 21 MEAN: 19 13 11 10 11 12 17 17 18 19 19 19 MINIMUM: 18 9 8 6 8 8 11 13 15 l1 18 17 DAYS OF RECORD: 4 15 18 21 14 11 5 8 1 8 6 4

47 RUSSIAN RIVER BASIN

USGS: 11-4658. SANTA ROSA CREEK NEAR SANTA ROSA, CALIF. DWR: F-9-1205

LQ~AllQ~.--LAT 38 ?7 25, LONG 122 37 50, NE1/4NE1/4 SEC.16, T.7 N, R.7 W, IN LOS GUILICOS GRANT, ON LEFT BANK 500 FT DOWNSTREAM FROM HIGHWAY BRIDGE, 1,500 FT UPSTREAM FROM UNNAMED TRIBUTARY, AND 4.6 MILES EAST OF SANTA ROSA, SONOMA COUNTY. A~lliUQf_Qf_GAGf.--319 FT ABOVE MEAN SEA LEVEL. QBAl~AGf_ABEA·--12.5 SQ. MI. &E~Q&Q~-~~~lLAfiLf.--89 PERIODIC OBSERVATIONS FROM AUGUST 1959 THROUGH SEPTEMBER 1968. NO CONTINUOUS RECORDS. A~EBAGf_QlS~tlABGf.--16.9 CFS FOR 8 YEARS OF RECORD. BEMABKS.--REGULATION OF FLOW NOT SIGNIFICANT. EX!Bf~fS.--PFRIODIC DATA: MAXIMUM 23 DEG. C, AUG. 30, 1966 MINIMUM = 3 DEG. C, DEC. 30, 1960, JAN. 14, 1963

WATER TEMPFRATURES FROM PERIODIC DATA, DEGREES CELSIUS

Pt:RIOD QLBECUBLl

19'59-68 MAXIMUM: 19 16 13 14 n 15 16 16 19 20 23 19 MEAN: 14 12 7 8 11 12 12 13 16 17 19 16 MINIMUM: 10 9 3 3 8 8 8 11 1 3 16 17 13 DAYS OF RECORD: 9 9 11 13 6 8 5 4 9 5 5 5

USGS: 11-4670. RUSSIAN RIVER NEAR GUERNEVILLE, CALIF. DWR: F-9-1100

~QCAllQ~.--LAT 38 30 O, LONG 122 56 5, NE1/4 SEC. 35, T.8 N, R.10 w, ON LEFT B~NK 0.6 MILE DOWNSTREAM FROM HOBSON CREEK AND 3.4 MILES EAST OF GUERNEVILLE, SONOMA COUNTY. ALiliUQf_Qf_GAGf.--17 FT ABOVE MEAN SEA LEVEL. QBAl~AGf_ABfA.--1,340 SQ. MI. BECUBQS_A~AlLAfilf·--398 PERIODIC OBSERVATIONS FROM JANUARY 1950 THROUGH SEPTEMBER 1968. CONTINUOUS RECORD FROM OCTOBER 1963 THROUGH SEPTEMBER 1968. A~EBAGf_QlS~tlABGf.--2,243 CFS FOR 28 YEARS OF RECORD. BEMABKS.--SIGNIFICANT REGULATION OF FLOW BEGAN NOVEMBER 1958. EXIBEMfS.--CUNTINUOUS DATA: MAXIMUM = 28 DEG. C, JUNE 24, 1964, JUNE 23, 1968 MINIMUM = 4 OEG. C, DEC. 15, 1967, JAN. 12, 1968 PERIODIC DATA: MAXIMUM 27 DEG. C, SEP. 9, 1953 MINIMUM = 4 DEG. C, JAN. 15, 1950, DEC. 15, 1967

WAfER TEMPERATURES FROM THERMOGRAPH DATA, DEGREES CELSIUS

1964 MAXIMUM: ** ** ** 10 11 13 19 23 , 28 28 27 23 Mt'AN: ** ** ** 8 10 11 15 18 22 24 23 20 MINIMUM: ** ** ** 8 9 9 10 13 17 22 20 17 1965 MAXIMUM: 21 16 13 ** 12 16 19 22 24 26 26 24 MEAN: 18 13 12 ** 12 14 14 17 20 23 24 20 MINIMUM: 16 ll 11 ** 11 12 11 l3 17 21 22 l7 1966 MAXIMUM: 21 17 10 12 17 19 22 26 27 26 23 MEAN: 18 13 9 12 17 18 22 23 23 21 MINIMUM: 16 8 8 8 14 16 17 20 19 18

1967 MAXIMUM: 21 17 13 12 14 14 13 22 26 27 26 23 MEAN: 17 14 12 10 12 12 11 17 20 24 24 22 M.INIMUM: 14 12 9 8 11 9 10 12 16 22 22 19

MAXIMUM: 21 17 10 ll 15 11 21 21 28 28 27 26 MEAN: 18 14 8 8 12 13 17 21 24 24 23 22 MINIMUM: 16 11 4 4 8 10 13 17 20 22 20 17

l 'J64- 1968 MAXIMUM: 21 17 13 12 15 17 21 27 28 28 27 26 MEAN: 18 14 10 9 11 12 15 18 22 24 23 21 MINIMUM: 14 8 4 4 R R 10 12 16 20 19 17 DAYS OF RECORD: 119 120 113 115 116 155 150 155 150 155 155 146

48 RUSSIAN RIVER BASIN USGS: 11-4670.--Continued

WAT ER TEMP ER ATURES FROM PERIODIC DATA, DEGREES CELSIUS PERI OD JL!!.EC.URQ QC.I ... ~ U ::L ... D.E.C. ... J.A~ ... EEB..a. I:!AR ... Aea ... I:!AY J.UJ:l.E J.l.ILY Al.!iiA. .S..Ee ... 19 50-59 MIIXIMUM: 2 3 17 12 14 16 15 17 23 MEAN: ?5 26 26 27 18 14 10 9 10 12 15 18 21 24 MI NIMUM: 23 22 14 10 8 4 7 9 13 13 10 21 14 DAYS OF REC ORD: 16 17 13 9 12 13 11 12 15 14 15 16 18 1960-6 8 MAXIMUM: 21 18 13 12 16 16 19 24 26 25 24 23 MEAN: 18 13 10 9 11 12 16 19 22 23 22 21 MINIMUM: 14 9 4 6 6 9 11 14 18 21 20 19 DAYS OF RECDR D: 17 25 17 20 13 30 15 29 28 18 9 1?

US GS: ll-4672. AUSTI N CREEK NEAR CAZADERO, CALIF. DWR: F-9-1010

LQC.AllQ~.--LAT 38 30 5, LD NG 123 4 5, SWl/4 SEC. 27, T.B N, R.ll w, ON LEFT RANK 0 .6 MILE DOW NSTREAM FRO M CON FLUE NCE OF BIG AUSTIN AND EAST AUSTIN CR EEKS, 2.3 MILES SOUTHEAST OF CAZADERO, AND 3.4 MILES UPSTREAM FROM MOUTH, SONOMA COUNTY. AJ..llll.!D..E_Qf_GAG.E.--38 FT ABOVE MEAN SEA LEVEL. D.BAl~A~E-AB.EA.--63.1 SQ. MI. BEC.Q~D.~_A::LAlLAaLE·--67 PERIODIC OBSERVATIONS FROM MAY 1959 THROUGH JULY 1966. Nu CONTINUOUS RECORDS. A::l.EBAG.E_Ql~C.tiABG.E.--169 CFS FOR 7 YEARS OF RECORD. BEI:!ABK~.--RE G ULATI ON OF FLOW NOT SIGNIFICANT. EXIBEI:!E.S..--PERIOOIC DATA: MAXIMUM 21 OEG. c, AUG. a, 1961, SEP. 4, 1963- MINIMUM : 4 DEG. C, JAN. 14, 1963, DEC. 17, 1965

WATER TEMPERATURES FROM PERIODIC DATA, DEGREES CELSIUS

PERIOD QLB.EC.U!3.D. QC.l.a. J:lQ::L ... DEC.... J.A~ ... E.EB. ... !:!A B.a. A£B.a. !:!At J.l.l!::LE JULY Al.lii ... .Sf£ ...

1959-66 MAXIMUM: 18 15 13 12 12 12 19 16 19 20 21 21 MEAN: 17 13 9 9 11 10 15 15 18 19 20 20 MINIMUM: 14 9 4 4 11 8 11 13 17 18 19 18 DAYS OF RECORD: 5 9 10 10 2 7 5 5 5 4 2 3

49 NUMERICAL INDEX Page 11-1625. Pescadero Creek near Pescadero, Calif------­ 10 1625.4 Butano Creek near Pescadero, Calif------­ 10 1626. Purisima Creek near Half Moon Bay, Calif------­ 11 1626.3 Pilarcitos Creek at Half Moon Bay, Calif------­ 11 1627.2 Colma Creek at South San Francisco, Calif------11

1627.22 Spruce Branch at South San Francisco, Calif--~------­ 12 1628. Redwood Creek at Redwood City, Calif------~------­ 12 1629. Sharon Creek near Menlo Park, Calif------­ 12 1629.4 San Francisquito Creek below Ladera Damsite, n.ear Stanford University, Calif­ 13 1629.5 San Francisquito Creek Tributary near Stanford University, Calif------13 1632. Los Trancos Creek Tributary near Stanford University, Calif------­ 13 1645. San Francisquito Creek at Stanford University, Calif------­ 14 1660. Matadero Creek at Palo Alto, Calif------­ 14 1665. Stevens Creek near Cupertino, Calif------­ 14 1669. Alamitos Creek near New Almaden, Calif------15

1670. Alamitos Creek near Edenvale, Calif------­ 15 1675. Guadalupe Creek at Guadalupe, Calif------15 1676.6 Ross Creek at San Jose, Calif------16 1680. Los Gatos Creek at Los Gatos, Calif------­ 16 1690. Guadalupe River at San Jose, Calif------16

1695. Saratoga Creek at Saratoga, Calif------­ 17 1698. Coyote Creek near Gilroy, Calif------­ 17 1700. Coyote Creek near Madrone, Calif------­ 18 1715. Coyote Creek near Edenvale, Calif------­ 18 1721. Upper Penitencia Creek at San Jose, Calif------18

1722.2 Arroyo De Los Coches near Milpitas, Calif------­ 19 1740. San Antonio Creek near Sunol, Calif------­ 19 1760. Arroyo Mocho near Livermore, Calif------~ 19 1762. Arroyo Mocho near Pleasanton, Calif------­ 20 1764. Arroyo Valle Above Lang Canyon, near Livermore, Calif------20

1765. Arroyo Valle near Livermore; Calif------­ 21 1766. Arroyo Valle at Pleasanton, Calif------­ 22 1769. Arroyo De La Laguna at Verona, Calif------­ 22 1790. Alameda Creek near Niles, Calif------­ 23 1805. Dry Creek at Union City, Calif------24

1807. Patterson Creek at Union City, Calif------­ 24 1807.5 Alameda Creek at Union City, Calif------­ 25 1810. San Lorenzo Creek at Hayward, Calif------­ 25 1810.4 San Lorenzo Creek at San Lorenzo, Calif------­ 26 1814. Wildcat Creek at Richmond, Calif------26

1820.3 Rheem Creek at San Pablo, Calif------26 1821. Pinole Creek at Pinole, Calif------27 1824. Arroyo Del Hambre at Martinez, Calif------­ 27 1825. San Ramon Creek at San Ramon, Calif------·------­ 27 1830. San Ramon Creek at Walnut Creek, Calif------28

1835. Walnut Creek at Walnut Creek, Calif------­ 28 1836.5 Walnut Creek at Pleasant Hill, Calif-·------­ 28 1840. Galindo Creek at Concord, Calif------29 1845. Pine Creek at Concord, Calif------29 1850. Grayson Creek near Hookston, Calif------29

so Page ll-1851. Grayson Creek near Pacheco, Calif------­ 30 4559.5 Sulphur Creek near St. Helena, Calif------­ 30 4560. Napa River near St. Helena, Calif------­ 30 4565. Conn Creek near St. Helena, Calif------­ 32 4570. Dry Creek near Napa, Calif------32

4580. Napa River near Napa, Calif------~------~------­ 32 4582. Redwood Creek near Napa, Calif------­ 33 4583.5 Napa River at Dutton Landing near Vallejo, Calif------­ 33 4585. Sonoma Creek at Agua Caliente, Calif------­ 33 4590. Petaluma River at Petaluma, Calif------34 4595. Novato Creek at Novato, Calif------­ 34 46oo. Corte Madera Creek at Ross, Calif------~------­ 34 4601. Arroyo Corte Madera Del Presidio at Mill Valley, Calif------­ 35 4601.6 Morses Creek at Bolinas, Calif------­ 35 4601.65 Audubon Creek near Bolinas, Calif------~------35

4601.7 Pine Creek at Bolinas, Calif------­ 36 4605. Arroyo Nicasio near Point Reyes Station, Calif------­ 36 4607. Arroyo Sausal near Marshall, Calif------~--­ 37 4608. Walker Creek near Tomales, Calif------­ 37 4609.2 Salmon Creek at Bodega, · Calif------37

4609.4 Russian River near Redwood Valley, Calif------­ 38 4610. Russian River near Ukiah, Calif------­ 38 4615. East Fork Russian River near Calpella, Calif------­ 39 4620. East Fork Russian River near Ukiah, Calif------­ 4o 4625. Russian River near Hopland, Calif------42

4627. Feliz Creek near Hopland, Calif------­ 42 4630. Russian River near Cloverdale, Calif------­ 43 4632. Big Sulphur Creek near Cloverdale, Calif------­ 44 4639. Maacama Creek near Kellogg, Calif------­ 44 4639.4 Franz Creek near Kellogg, Calif------45

4640. Russian River near Healdsburg, Calif------­ 45 4640.5 Dry Creek Tributary near Hopland, Calif------­ 46 4645. Dry Creek near Cloverdale, Calif------­ 46 4652. Dry Creek near Geyserville, Calif------­ 47 4658. Santa Rosa Creek near Santa Rosa, Calif------­ 48 4670. Russian River near Guerneville, Calif------­ 48 4672. Austin Creek near Cazadero, Calif------49

51 ALPHABETICAL INDEX Page ll-1807.5 Alameda Creek at Union City, Calif------24 1790. near Niles, Calif------23 1670. Alamitos Creek near Edenvale, Calif------15 1669. near New Almaden, Calif------15 4601. Arroyo Corte Madera Del Presidio at Mill Valley, Calif------35

1769. Arroyo De La Laguna at Verona, Calif------­ 22 1722.2 Arroyo De Los Caches near Milpitas, Calif------­ 19 1824. Arroyo Del Hambre at Martinez, Calif------­ 27 1760. Arroyo Mocho near Livermore, Calif------19 1762. near Pleasanton, Calif------20

4605. Arroyo Nicasio near Point Reyes Station, Calif------­ 36 4607. Arroyo Sausal near Marshall, Calif------­ 37 1764. Arroyo Valle above Lang Canyon, near Livermore, Calif------~- 20 1766. at Pleasanton, Calif------~------­ 22 1765. near Livermore, Calif------21 4601.65 Audubon Creek near Bolinas, Calif------­ 35 4672. Austin Creek near Cazadero, Calif------­ 49 4632. Big Sulphur Creek near Cloverdale, Calif------­ 44 1625.4 Butano Creek near Pescadero, Calif------­ 10 1627.2 Colma Creek at South San Francisco, Calif------ll

4565. Conn Creek near St. Helena, Calif------­ 32 4600. Corte Madera Creek at Ross, Calif------­ 34 1715. Coyote Creek near Edenvale, Calif------18 1698. near Gilroy, Calif------­ 17 1700. near Madrone, Calif------18

1805. Dry Creek at Union City, Calif------24 4645. near Cloverdale, Calif------46 4652. near Geyserville, Calif------47 4570. near Napa, Calif------.------32 4640.5 Dry Creek Tributary near Hopland, Calif------46

4627. Feliz Creek near Hopland, Calif------­ 42 4639.4 Franz Creek near Kellogg, Calif------­ 45 1840. Galindo Creek at Concord, Calif------­ 29 1850. Grayson Creek near Hookston, Calif------29 1851. near Pacheco, Calif------30

1675. Guadalupe Creek at Guadalupe, Calif------­ 15 1690. Guadalupe River at San Jose, Calif------­ 16 1680. Los Gatos Creek at Los Gatos, Calif------­ 16 1632. Los Trancos Creek Tributary near Stanford University, Calif------­ 13 4639. Maacama Creek near Kellogg, Calif------44

1660. Matadero Creek at Palo Alto, Calif------­ 14 4601.6 Morses Creek at Bolinas, Calif------­ 35 4583.5 Napa River at Dutton Landing near Vallejo, Calif------33 4580. near Napa, Calif------­ 32 4560. near St. Helena, Calif------30 4595. Novato Creek at Novato, Calif------­ 34 1807. Patterson Creek at Union City, Calif------­ 24 1625. Pescadero Creek near Pescadero, Calif------­ 10 4590. Petaluma River at Petaluma, Calif------­ 34 1626.3 Pilarcitos Creek at Half Moon Bay, Calif------ll Page 11-4601.7 Pine Creek at Bolinas, Calif------36 1845. at Concord, Calif------29 1821. Pinole Creek at Pinole, Calif------­ 27 1626. Purisima Creek near Half Moon Bay, Calif------~------­ ll 1628. Redwood Creek at Redwood City, Calif------12

4582. near Napa, Calif------33 1820.3 Rheem Creek at San Pablo, Calif------­ 26 1676.6 Ross Creek at San Jose, Calif------~------­ 16 4630. Russian River near Cloverdale, Calif------43 4670. near Guerneville, Calif------48

4640. near Healdsburg, Calif------45 4625. near Hopland, Calif------42 4609.4 near Redwood Valley, Calif------38 4610. near Ukiah, Calif------38 4615. East Fork, near Calpella, Calif·------39

4620. East Fork, near Ukiah, Calif------­ 40 4609.2 Salmon Creek at Bodega, Calif------­ 37 1740. San Antonio Creek near Sunol, Calif------­ 19 1645. San Francisquito Creek at Stanford University, Calif------14 1629.4 below Ladera Damsite, near Stanford University, Calif------13

1629.5 Tributary near Stanford University, Calif------­ 13 1810. San Lorenzo Creek at Hayward, Calif------25 1810.4 at San Lorenzo, Calif------~------26 1825. San Ramon Creek at San Ramon, Calif------27 1830. at Walnut Creek, Calif------28

4658. Santa Rosa Creek near Santa Rosa, Calif------­ 48 1695. Saratoga Creek at Saratoga, Calif------­ 17 1629. Sharon Creek near Menlo Park, Calif------­ 12 4585. Sonoma Creek at Agua Caliente, Calif------­ 33 1627.22 Spruce Branch at South San Francisco, Calif------12

1665. Stevens Creek near CUpertino, Calif------­ 14 4559.5 Sulphur Creek near St. Helena, Calif------­ 30 1721. Upper Penitencia Creek at San Jose, Calif------­ 18 46o8. Walker Creek near Tomales, Calif------­ 37 1836.5 Walnut Creek at Pleasant Hill, Calif------28 1835. at Walnut Creek, Calif------28 1814. Wildcat Creek at Richmond, Calif------26

53 GPO 981-235