USGS Water-Year Summary for Site 11261500

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	Available Parameters
	00010 Temperature, water(Mean,Max.,Min.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Mean,Max.,Min.)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

11261500 San Joaquin River at Fremont Ford Bridge, CA

LOCATION - Lat 37°18'36", long 120°55'48" referenced to North American Datum of 1927, in NW 1/4 SE 1/4 sec.24, T.7 S., R.9 E., Merced County, CA, Hydrologic Unit 18040001, on left bank, 20 ft upstream from Fremont Ford Bridge, 2.1 mi downstream of Salt Slough, 4.5 mi west of Stevinson, and 6.7 mi upstream from Merced River.

DRAINAGE AREA - 7,615 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - March 1937 to September 1971, October 1985 to September 1989, October 2001 to current year. Monthly discharge only for some periods, published in WSP 1315-A. Prior to September 1970, records did not include flow bypassing station.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 72.37 ft above NAVD of 1988. Prior to Oct. 1, 1959, at site 170 ft downstream at datum 0.54 ft lower. Oct. 1, 1959, to Sept. 30, 1970, at site 120 ft downstream at datum 3.23 higher. Oct. 1, 1985, to Sept. 30, 1989, at datum 3.23 ft higher.

REMARKS - Natural flow of stream affected by storage reservoirs, ground withdrawals, diversions for irrigation, and imported water from Delta-Mendota Canal (station 11313000). Low flows consist mainly of return water from irrigated areas. At higher stages this station can represent the combined flows of the San Joaquin River and Mud Slough (11262900). Stage affected at times by backwater from the Merced River.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 23,000 ft³/s, Apr. 8, 2006, gage height, 71.60 ft; minimum daily, 8.8 ft³/s (estimated), Sept. 28, 2015.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

DISCRETE WATER-QUALITY DATA:
CHEMICAL DATA: Water years 1955-66, 1970, 1980, 1984-88, 1992, September 1994, 2015-2016.

CONTINUOUS WATER-QUALITY DATA:
SPECIFIC CONDUCTANCE: Water years October 1988 to September 1989, December 2001 to current year. (water years 1989, 2001-2023, daily).
WATER TEMPERATURE: Water years October 1988 to September 1989, December 2001 to current year. (water years 1989. 2001-2023, daily).

INSTRUMENTATION - Water-quality monitor from October 1985 to September 1989, and since December 2001.

REMARKS - Data for the period October 1985 to March 1987 are available in U.S. Geological Survey Open-File Report 88-479. Data for the period April 1987 to September 1988 are available in the files of the U.S. Geological Survey.