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Water-Year Summary for Site 11319500

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Available Parameters
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
11319500 Mokelumne River near Mokelumne Hill, CA
LOCATION - Lat 38°18'46", long 120°43'09" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 sec.01, T.5 N., R.11 E., Calaveras County, CA, Hydrologic Unit 18040012, on downstream side of bridge, 1.2 mi northwest of Mokelumne Hill, and 8 mi downstream from confluence of North and South Forks of Mokelumne River.
DRAINAGE AREA - 544 mi².
REVISIONS HISTORY - WSP 1445: 1903-04, 1928 (instantaneous maximum discharge), 1936 (instantaneous maximum discharge), 1938 (instantaneous maximum discharge), 1940 (instantaneous maximum discharge), 1943 (instantaneous maximum discharge), 1945 (instantaneous maximum discharge). WSP 1930: Drainage area. WDR CA-00-3: 1996 (maximum gage height).
SURFACE-WATER RECORDS
PERIOD OF RECORD - January to June 1901, May 1903 to December 1904, October 1927 to current year. Yearly estimate only for water year 1928 (incomplete), published in WSP 1315-A. Published as "at Electra" 1901, 1903-04. CHEMICAL DATA: Water year 1980. Water years 1971-79 in files of California Department of Water Resources. WATER TEMPERATURE: Water years 1961-79.
GAGE - Water-stage recorder. Datum of gage is 584.88 ft above NGVD of 1929 (levels by California Division of Highways). Jan. 1, to June 30, 1901, and May 11, 1903, to Dec. 31, 1904, nonrecording gage at site 3 mi upstream at different datum. Nov. 10, 1927, to Aug. 26, 1952, water-stage recorder at site 40 ft upstream at datum 5.00 ft higher. Aug. 27, 1952, to Oct. 14, 1977, at present site at datum 5.00 ft higher.
COOPERATION - Records were collected by East Bay Municipal Utility District, under general supervision of the U.S. Geological Survey.
REMARKS - Flow regulated by Salt Springs Reservoir (station 11313500) beginning in 1931, several smaller reservoirs, and four powerplants. Diversion upstream from station for irrigation and domestic use. See schematic diagram of Mokelumne River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 41,300 ft³/s, Jan. 2, 1997, gage height, 25.60 ft, present datum; minimum observed, 5 ft³/s, Aug. 13-15, 17, 18, 1904.