USGS Water-Year Summary 2019
11254000 San Joaquin River near Mendota, CA
LOCATION - Lat 36°48'38", long 120°22'38" referenced to North American Datum of 1927, in SE 1/4 SW 1/4 sec.07, T.13 S., R.15 E., Fresno County, CA, Hydrologic Unit 18040001, 2.5 mi below Mendota Dam, and 3.5 mi north of Mendota.
DRAINAGE AREA - 3,940 mi².
- WDR CA-00-3: Drainage area.
PERIOD OF RECORD - October 1939 to September 1954, December 1999 to current year.
GAGE - Water-stage recorder. Datum of gage is 138.8 ft above NGVD of 1929 (levels by U.S. Bureau of Reclamation). Prior to Nov. 3, 1947, at site 200 ft downstream. Prior to Nov. 4, 1953, at datum 2.00 ft higher.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 11,700 ft³/s, June 20, 1941, gage height, 13.75 ft, site and datum then in use, maximum gage height, 16.60 ft, Apr. 22, 2006; no flow at times during most years.
PERIOD OF RECORD
CONTINUOUS WATER TEMPERATURE: January 2013 to current year.
CONTINUOUS SPECIFIC CONDUCTANCE: January 2013 to current year.
SEDIMENT DATA: March 2010 to May 2013.