USGS Water-Year Summary for Site 11172175

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	Available Parameters
	00010 Temperature, water(Min.,Max.,Mean)
	00060 Discharge(Mean)
	80154 Suspnd sedmnt conc(Mean)
	80155 Suspnd sedmnt disch(Mean)

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

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USGS Water-Year Summary 2023

11172175 Coyote Creek above Highway 237, at Milpitas, CA

LOCATION - Lat 37°25'20", long 121°55'35" referenced to North American Datum of 1927, in sec.00, T.6 S., R.1 W., Santa Clara County, CA, Hydrologic Unit 18050003, in Rincon de los Esteras Grant, on right bank, at transition between natural channel and concrete flood control channel, 400 ft upstream from Highway 237 bridge, 1 mi west of Interstate Highway 880, 1.3 mi west of Milpitas, and 2.3 mi upstream from lower Penitencia Creek.

DRAINAGE AREA - 319 mi².

REVISIONS HISTORY -

Discharge for the period Nov. 15, 2022, to Oct. 12, 2022, was revised on Mar. 04, 2024, based on changes to the stage-discharge rating.

Suspended sediment data for the period Oct. 1, 2021, to Sep. 30, 2022, was revised on Apr. 03, 2024, based on additional data.

SURFACE-WATER RECORDS

PERIOD OF RECORD - January 1999 to current year.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 6.51 ft above NAVD of 1988.

REMARKS - Flow regulated by Leroy Anderson Reservoir, usable capacity, 89,073 acre-ft, and Coyote Reservoir, usable capacity, 22,925 acre-ft, with water diverted for percolation in spreading basins adjacent to Coyote Creek.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 6,670 ft³/s, Feb. 22, 2017, gage height, 17.77 ft. Minimum daily discharge, 2.7 ft³/s, Oct. 26, 2015.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 2004-07, October 2008 to April 2013. WATER TEMPERATURE: Water years 2004-07, October 2008 to April 2013, February 2022 to current water year. TURBIDITY: May 2022 to current water year. SEDIMENT DATA: Water years 2004-07, October 2008 to April 2013, October 2022 to current water year.

PERIOD OF DAILY RECORD - SUSPENDED-SEDIMENT DISCHARGE: October 2003 to April 2007, October 2008 to April 2013, October 2021 to current water year.