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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
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USGS Water-Year Summary 2024
11136100 SAN ANTONIO CREEK NEAR CASMALIA CA
LOCATION - Lat 34°46'56", long 120°31'45" referenced to North American Datum of 1927, Santa Barbara County, CA, Hydrologic Unit 18060009, on left bank, 10 feet downstream of San Antonio Road Bridge, 0.7 mi east of junction of San Antonio Road and Lompoc-Casmalia Road, and 3.8 mi south of Casmalia.
DRAINAGE AREA - 135 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1955 to September 1993, October 1994 to September 30, 2003, October 2014 to current year.
GAGE - Water-stage recorder and concrete control. Datum of gage is 106.68 ft above NAVD of 1988. Prior to June 27, 1958, at datum 2.00 ft higher.
REMARKS - No regulation upstream from station. Flow affected by pumping from wells along stream for irrigation and beaver dam activity upstream from station. At times water is released to creek from Vandenberg Air Force Base Water-Treatment Plant.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 4,680 ft³/s, Mar. 1, 1983, gage height, 14.32 ft, from rating curve extended above 1,100 ft³/s, on basis of slope-area measurement at gage height 12.93 ft; minimum daily, 0.04 ft³/s, January 22, 2001 and April 9, 2022.
