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Water-Year Summary for Site 11395030

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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
11395030 South Fork Feather River below Little Grass Valley Dam, CA
LOCATION - Lat 39°43'26", long 121°01'16" referenced to North American Datum of 1927, in SW 1/4 NW 1/4 sec.31, T.22 N., R.9 E., Plumas County, CA, Hydrologic Unit 18020123, in Plumas National Forest, on left bank, 0.1 mi downstream from Little Grass Valley Dam, and 3.5 mi northwest of La Porte.
DRAINAGE AREA - 25.9 mi².
REVISIONS HISTORY - WSP 1931: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1927 to September 1933 (published as "near La Porte"), October 1960 to current year.
GAGE - Water-stage recorder. Elevation of gage is 4,809.0 ft above NGVD of 1929. Prior to Oct. 1, 1960, at site 0.4 mi upstream at different datum. Oct. 1, 1960, to Oct. 30, 1962, at present site and datum. Nov. 1, 1962, to May 31, 1966, at site on outlet works at base of Little Grass Valley Dam 0.1 mi upstream at datum 4,850.00 ft above NGVD of 1929.
COOPERATION - Records provided by South Feather Water and Power Agency, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2088.
REMARKS - Flow regulated by Little Grass Valley Reservoir (station 11395020) beginning in October 1961. No diversion upstream from station. See schematic diagram of South Fork Feather River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 7,370 ft³/s, Jan. 1, 1997, gage height, 14.80 ft; minimum daily, 0.2 ft³/s, Oct. 28-31, Nov. 2, 1961, during initial operation of Little Grass Valley Reservoir; since operation stabilized in 1964, 1.4 ft³/s, Jan. 27, 1964.