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Water-Year Summary for Site USGS 11023000

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Available Parameters
00060 Discharge(Mean)  

Water year 2021: 2020-10-01 to 2021-09-30

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USGS Water-Year Summary 2021
11023000 San Diego River at Fashion Valley, at San Diego, CA
LOCATION - Lat 32°45'54", long 117°10'04" referenced to North American Datum of 1927, San Diego County, CA, Hydrologic Unit 18070304, in Mission San Diego Grant, on left bank, 500 ft upstream from Fashion Valley Road crossing, 0.4 mi downstream from unnamed tributary, 2.6 mi upstream from mouth, and 26.4 mi downstream from El Capitan Reservoir.
DRAINAGE AREA - 429 mi².
PERIOD OF RECORD - October 1912 to January 1916 published as "San Diego River at San Diego" (monthly discharge only, published in WSP 1315-B), January 1982 to current year. Records for Oct. 1, 1981, to Jan. 17, 1982, published in WDR CA-82-1, are in error and should not be used. WATER TEMPERATURE: Water year 1984. SEDIMENT DATA: Water year 1984.
GAGE - Water-stage recorder. Elevation of gage is 20 ft above NGVD of 1929, from topographic map. See WSP 1315-B for history of changes for period October 1912 to January 1916.
REMARKS - Flow regulated by Cuyamaca Reservoir, capacity, 11,740 acre-ft; El Capitan Reservoir (station 11020600), and San Vicente Reservoir (station 11022100). Diversions by city of San Diego for municipal supply and by Helix Irrigation District. See schematic diagram of the San Diego River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 75,000 ft³/s, Jan. 27, 1916, gage height, 19.3 ft, site and datum then in use, estimated on basis of upstream station, San Diego River near Santee; no flow at times during some years. Maximum discharge recorded since storage began in El Capitan Reservoir and San Vicente Reservoir, 9,810 ft³/s, Feb. 28, 2017, gage height, 14.15 ft, from rating curve extended above 5,800 ft³/s.