USGS Water-Year Summary 2020
11406920 Thermalito Afterbay Release to Feather River, near Oroville, CA
LOCATION - Lat 39°27'23", long 121°38'10" referenced to North American Datum of 1927, in NW 1/4 SE 1/4 sec.33, T.19 N., R.3 E., Butte County, CA, Hydrologic Unit 18020106, on left bank of outlet channel, 955 ft downstream from centerline of Thermalito Afterbay Dam, and 5.7 mi southwest of Oroville.
PERIOD OF RECORD - November 1967 to current year.
WATER TEMPERATURE: Water years 1969-92.
GAGE - Water-stage recorder. Datum of gage is 113.47 ft above NGVD of 1929 (levels by California Department of Water Resources). Prior to May 1, 1970, at datum 13.00 ft lower.
COOPERATION - Records collected by California Department of Water Resources, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2100.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 21,600 ft³/s, Jan. 28, 1970, Jan. 2, 1997, maximum gage height, 23.30 ft, Jan. 28, 1970, datum then in use; no flow for many days during water year 1968.