USGS Water-Year Summary 2021
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.
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.