USGS Water-Year Summary 2024

11149900 San Antonio River near Lockwood, CA

LOCATION - Lat 35°53'48", long 121°05'14" referenced to North American Datum of 1927, Monterey County, CA, Hydrologic Unit 18060005, Hunter Liggett Military Reservation, in Los Ojitos Grant, on right bank downstream side of highway bridge, 0.4 mi upstream from Tule Canyon, and 3.3 mi south of Lockwood.

DRAINAGE AREA - 217 mi².

REVISIONS HISTORY - WDR CA-82-2: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1965 to current year.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 795 ft above NGVD of 1929 and 798.32 ft above NAVD of 1988. Prior to Aug. 28, 1975, at datum 5.00 ft higher..

REMARKS - No regulation; some pumping upstream from station. See schematic diagram of Salinas River Basin available from the California Water Science Center.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 23,600 ft³/s, Mar. 10, 1995, gage height, 14.25 ft, current datum, from rating curve extended above 8,000 ft³/s, on basis of contracted-opening measurement at gage height 12.6 ft; no flow for many days in each year.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1966 to 2014. WATER TEMPERATURE: Water years 1966-73. SEDIMENT DATA: Water years 1966 to 2014 (discontinued).

PERIOD OF DAILY RECORD - WATER TEMPERATURE: November 1965 to May 1973. SUSPENDED-SEDIMENT DISCHARGE: October 1965 to September 1973.

EXTREMES FOR PERIOD OF DAILY RECORD - SEDIMENT CONCENTRATION: Maximum daily mean, 7,420 mg/L, Dec. 6, 1966; minimum daily mean, no flow on many days each year. SEDIMENT LOAD: Maximum daily, 161,000 tons, Dec. 6, 1966; minimum daily, 0 ton, many days each year.