USGS Water-Year Summary 2021
11396200 South Fork Feather River below Forbestown Dam, CA
LOCATION - Lat 39°33'05", long 121°12'30" referenced to North American Datum of 1927, in SE 1/4 NE 1/4 sec.32, T.20 N., R.7 E., Butte County, CA, Hydrologic Unit 18020123, in Plumas National Forest, on right bank, 500 ft downstream from Forbestown Dam, 0.4 mi upstream from Oroleve Creek, and 4.0 mi northeast of Forbestown.
DRAINAGE AREA - 87.5 mi².
PERIOD OF RECORD - July 1962 to current year. Records for Forbestown Powerplant from February 1963 to September 1966 in files of the U.S. Geological Survey.
GAGE - Water-stage recorder. Elevation of gage is 1,690 ft above NGVD of 1929, from topographic map.
COOPERATION - Records, including discharge to Forbestown Powerplant (station 11396290), 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.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 21,800 ft³/s, Jan. 1, 1997, gage height, 17.64 ft, from rating curve extended above 5,400 ft³/s, on basis of flow-over-dam measurement of peak flow; minimum daily, 0.60 ft³/s, Apr. 4, 1963, during initial operation of Little Grass Valley Reservoir; since operation stabilized in 1964, 1.3 ft³/s, Mar. 15, 1980.