USGS Water-Year Summary for Site 11443500

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

11443500 South Fork American River near Camino, CA

LOCATION - Lat 38°46'23", long 120°42'02" referenced to North American Datum of 1927, in SW 1/4 NE 1/4 sec.25, T.11 N., R.11 E., El Dorado County, CA, Hydrologic Unit 18020129, on left bank, 500 ft downstream from Slab Creek Reservoir dam, and 2.8 mi northwest of Camino.

DRAINAGE AREA - 493 mi².

REVISIONS HISTORY - WSP 931: 1928, 1938, 1940 (instantaneous maximum discharge). WSP 1931: Drainage area at former site. WDR CA-2008: 2003-05. NWIS 2013: 1981-82 Diversion to White Rock Powerplant (station 11443460).

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1922 to current year. Monthly discharge only for October 1922, WSP 1315-A. Records for river and American River Flume, published separately October 1922 to September 1956 and October 1962 to December 1964, when flume was destroyed. Records of river and flume combined October 1956 to September 1962.

GAGE - Water-stage recorder. Elevation of gage is 1,650 ft above NGVD of 1929, from topographic map. May 1987 to September 2014, acoustic velocity meter at same location. Prior to May 1987, water-stage recorder at different datum at site 1,000 ft downstream. See WSP 2131 for history of changes prior to Oct. 12, 1966.

COOPERATION - Records were collected by Sacramento Municipal Utility District, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2101.

REMARKS - Flow regulated by several reservoirs. Since 1967, diversion from Slab Creek Dam to White Rock Powerplant bypasses this station. Echo Lake Conduit (station 11434500) imports up to 1,900 acre-ft each year from Truckee River Basin. Variable amounts of El Dorado Canal water, up to 40 ft³/s May to October, and about 7 ft³/s remainder of the year, diverted for irrigation and domestic use between Pollock Pines and Placerville. Water from Jenkinson Lake in North Fork Cosumnes River Basin diverted to Camino and substituted for flow from El Dorado Canal in some years. Since October 1962, water is imported from the Upper Rubicon River Basin by way of Robbs Peak Powerplant (station 11429300). See schematic diagram of South Fork American River Basin available from the California Water Science Center.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 62,300 ft³/s, Jan. 2, 1997, from rating curve extended above 24,000 ft³/s, on basis of computation of peak flow over dam; minimum daily, 1.3 ft³/s, Aug. 24, 1931.