USGS Water-Year Summary 2020
11395400 Sly Creek Reservoir near Strawberry Valley, CA
LOCATION - Lat 39°34'54", long 121°06'51" referenced to North American Datum of 1983, in NW 1/4 NW 1/4 sec.20, T.20 N., R.8 E., Butte County, CA, Hydrologic Unit 18020123, in Plumas National Forest, on left abutment of Sly Creek Dam on Lost Creek, and 1.4 mi northwest of Strawberry Valley.
DRAINAGE AREA - 24 mi².
- See time-series revision report
PERIOD OF RECORD - November 1961 to current year (fragmentary prior to Mar. 14, 1962).
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by Oroville-Wyandotte Irrigation District). Prior to Sept. 30, 1966, water-stage recorder in valve chamber inside dam at same datum. Oct. 1, 1966, to December 1974, nonrecording gage read once daily.
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.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 65,600 acre-ft, June 22, 1978, elevation, 3,530.9 ft; minimum observed under normal operating conditions since reservoir first filled, 860 acre-ft, Feb. 11, 1976, elevation, 3,320.0 ft. Reservoir completely drained for powerplant construction, Sept. 12 to Oct. 17, 1981.