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Water-Year Summary for Site 11253115

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00060 Discharge(Mean)  

Water year 2025: 2024-10-01 to 2025-09-30
 
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USGS Water-Year Summary 2025
11253115 San Joaquin River below Chowchilla Canal Intake, near Mendota, CA
LOCATION - Lat 36°46'25.5", long 120°17'09.6" referenced to North American Datum of 1983, in SW 1/4 NE 1/4 sec.25, T.13 S., R.15 E., Madera County, CA, Hydrologic Unit 18040001, below the Chowchilla Canal Bifurcation, 2.7 mi north of Whitesbridge Avenue, and 5.4 mi northeast of Mendota.
DRAINAGE AREA - 1,822 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 2009 to current year.
GAGE - Datum of gage is 170 ft above NGVD of 1929, from topographical map.
COOPERATION - Records provided by U.S. Bureau of Reclamation (USBR), under the general supervision of the U.S. Geological Survey.
REMARKS - Flow regulated by Millerton Lake (station 11250100) and by nine powerplants and eight reservoirs with combined capacity of about 609,300 acre-ft. USBR may divert water to Chowchilla Bypass Canal at structure located 50 ft upstream of gage. See schematic diagram of lower San Joaquin River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge 1,530 ft³/s, July 13, 2011, gage height, 7.35 ft; no flow at times in most years.
WATER-QUALITY RECORDS
PERIOD OF RECORD -

DISCRETE WATER-QUALITY DATA:
SEDIMENT DATA: Water years March 2010 to July 2016.

REMARKS - Sample and flow data collected for the San Joaquin River Restoration Project. No samples collected in 2014 and 2015 Water Years due to flow restrictions.  Instantaneous discharges are from USGS flow measurements made concurrently with samples.