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Water-Year Summary for Site USGS 11158600

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

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USGS Water-Year Summary 2022
11158600 San Benito River at State Highway 156, near Hollister, CA
LOCATION - Lat 36°51'07", long 121°25'44" referenced to North American Datum of 1927, San Benito County, CA, Hydrologic Unit 18060002, in San Justo Grant, on right bank, at downstream side of bridge on old State Highway 156, and 1.6 mi west of Hollister.
DRAINAGE AREA - 607 mi².
PERIOD OF RECORD - October 1970 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 260 ft above NGVD of 1929, from topographic map. Gage datum lowered by 3.00 ft on Oct. 1, 1999, to account for channel scour caused by 1998 flood.
REMARKS - Low flows regulated by Hernandez Reservoir 73 mi upstream, capacity, 18,500 acre-ft. Some diversions upstream from station for irrigation, and inter-basin transfer to Tres Pinos Creek for ground-water recharge. Percolation ponds are constructed upstream from station during summer months.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 34,500 ft³/s, Feb. 3, 1998, gage height, 13.48 ft, at datum then in use, from rating curve extended above 3,200 ft³/s, on basis of slope-area measurement of peak flow; no flow for many days in most years.