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USGS Water-Year Summary 2024
11453500 Putah Creek near Guenoc, CA
LOCATION - Lat 38°46'44", long 122°30'59" referenced to North American Datum of 1927, Lake County, CA, Hydrologic Unit 18020162, in Guenoc Land Grant, on right bank, just upstream from Coyote Valley dam site, 2.8 mi upstream from Soda Creek, and 3.2 mi downstream from Highway 29 bridge, at Guenoc.
DRAINAGE AREA - 113 mi².
REVISIONS HISTORY - WSP 1285: 1937 (instantaneous maximum discharge), 1938, 1940, 1943 (instantaneous maximum discharge), 1951 (instantaneous maximum discharge).
SURFACE-WATER RECORDS
PERIOD OF RECORD - February 1904 to September 1906, July 1930 to September 1976, and April 1998 to current year. Monthly discharge only for some periods, published in WSP 1315-A.
CHEMICAL DATA: Water year 1978.
WATER TEMPERATURE: Water years 1960-1973.
SEDIMENT DATA: Water years 1962-1973.
GAGE - Water-stage recorder. Datum of gage is 911.18 ft above NGVD of 1929 and 912.96 ft above NAVD of 1988. February 1904 to September 1906, nonrecording gage 0.2 mi upstream at different datum. July 1930 to September 1976, at datum 3.00 ft higher.
REMARKS - Some regulation by Hartmann Dam on Coyote Creek since 1969, capacity, 3,000 acre-ft; diversions and ground-water withdrawals for domestic use and irrigation of about 1,600 acres above station. See schematic diagram of lower Sacramento River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 32,000 ft³/s, Dec. 11, 1937, gage height, 22.7 ft from datum then in use, from rating curve extended above 13,000 ft³/s; no flow at times during 1964, 1970, 1974-76, 2007-09, 2013-2015.
