USGS Water-Year Summary 2023
11390500 Sacramento River below Wilkins Slough, near Grimes, CA
LOCATION - Lat 39°00'36", long 121°49'25" referenced to North American Datum of 1927, in NW 1/4 NE 1/4 sec.02, T.13 N., R.1 E., Colusa County, CA, Hydrologic Unit 18020104, on right bank, 1,200 ft downstream from Wilkins Slough, 5.8 mi southeast of Grimes, and at mile 62.9 upstream from Sacramento.
DRAINAGE AREA - 12,915 mi².
PERIOD OF RECORD - August 1931 to current year (prior to October 1938, low-water periods only). Monthly discharge only for some periods, published in WSP 1315-A. Prior to October 1965, published as "below Wilkins Slough."
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 3.00 ft below NGVD of 1929.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge (since water year 1939), 32,700 ft³/s, Feb. 20, 1986, gage height, 52.50 ft, maximum gage height, 52.75 ft, Mar. 1, 1940; minimum daily, 645 ft³/s, Aug. 9, 1939.
PERIOD OF RECORD
CONTINUOUS WATER-QUALITY DATA:
WATER TEMPERATURE: Water years October 1966 to current year.
INSTRUMENTATION - Water-temperature recorder since October 1966. Temperature recorder located at gaging station on right bank.