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Water-Year Summary for Site 11439500

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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
11439500 South Fork American River near Kyburz, CA
LOCATION - Lat 38°45'49", long 120°19'39" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 sec.29, T.11 N., R.15 E., El Dorado County, CA, Hydrologic Unit 18020129, Eldorado National Forest, on right bank, 0.8 mi downstream from Silver Fork American River, and 1.9 mi southwest of Kyburz.
DRAINAGE AREA - 193 mi².
REVISIONS HISTORY - WSP 1445: 1923 (instantaneous maximum discharge), 1925 (instantaneous maximum discharge), 1927 (instantaneous maximum discharge), 1928 (river only), 1935-37 (instantaneous maximum discharge). WSP 1515: 1928 (combined). WSP 1931: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - August to December 1907, October 1922 to current year. Prior to October 1956, records for river and El Dorado Canal published separately; combined flow only, October 1956 to September 1960.
CHEMICAL DATA: Water years 1979, 1980.
BIOLOGICAL DATA: Water years 1979, 1980.
WATER TEMPERATURE: Water years 1966-79.
SUSPENDED SEDIMENT: Water year 1980.
GAGE - Water-stage recorder on river; water-stage recorder for canal diversion (station 11439000). Elevation of gage is 3,840 ft above NGVD of 1929, from topographic map. Prior to Oct. 1, 1962, at datum 1.00 ft higher.
COOPERATION - Records were collected by El Dorado Irrigation District, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 184.
REMARKS - Low and medium flows regulated by Echo Lake, Silver Lake, Caples Lake, and Lake Aloha (stations 10336608, 11435900, 11436950, and 11434900, respectively), total capacity, 37,100 acre-ft. Some water is diverted out of river 0.6 mi upstream at diversion dam to El Dorado Canal (station 11439000). Part of this water is used for irrigation and domestic use and the remainder is returned to river at El Dorado Powerplant. See schematic diagram of South Fork American River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - River only: Maximum discharge, 25,000 ft³/s, Jan. 2, 1997, gage height, 14.26 ft (from floodmarks), from rating curve extended above 6,300 ft³/s, on basis of contracted-opening measurement at gage height 10.40 ft; minimum daily, 0.13 ft³/s, Nov. 26, 1977. Combined flow: Maximum discharge, 25,000 ft³/s, Jan. 2, 1997; minimum daily, 10 ft³/s, Oct. 17, 19, 1929.