USGS Water-Year Summary 2021
11157500 Tres Pinos Creek near Tres Pinos, CA
LOCATION - Lat 36°45'57", long 121°17'55" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.34, T.13 S., R.6 E., San Benito County, CA, Hydrologic Unit 18060002, in Santa Ana y Quien Sabe Grant, on right bank at north end of Highway 25 bridge, 2.3 mi southeast of Tres Pinos, and 4.7 mi upstream from mouth.
DRAINAGE AREA - 208 mi².
PERIOD OF RECORD - December 1922 to May 1923, December 1939 to September 1983, October 1996 to current year. Published as "at highway bridge, near Tres Pinos" 1923, December 1939 to November 1941. Records from this station and the "at highway bridge, near Tres Pinos" station, published as nonequivalent records in WSP 1315B, are now consider equivalent except during low-flow, due to diversion and channel losses, and are combined in this record. An annual estimate for 1940 and monthly estimates for October and November 1940 published in WSP 1315B for this station are superseded by the records from "at highway bridge, near Tres Pinos."
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 515 ft above NGVD of 1929, from topographic map. December 1940 to September 1983 at site 1.5 mi upstream at different datum.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of February 1938 reached a stage of about 9.0 ft, from floodmarks, at datum then in use.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 27,200 ft³/s, Feb. 3, 1998, gage height, 16.00 ft, from floodmarks, from rating curve extended above 9,000 ft³/s, on basis of slope-area measurement of peak flow; no flow at times in several years.