USGS Water-Year Summary 2019
11125500 Lake Cachuma near Santa Ynez, CA
LOCATION - Lat 34°34'57", long 119°58'47" referenced to North American Datum of 1927, Santa Barbara County, CA, Hydrologic Unit 18060010, in Lomas de la Purification Grant, at Bradbury Dam on Santa Ynez River, on upstream face near left end of dam, and 6.1 mi east of Santa Ynez.
DRAINAGE AREA - 418 mi².
PERIOD OF RECORD - November 1952 to current year. Prior to October 1985, only monthend elevations, contents, and total diversions published. November 1952 to October 1960, published as "Cachuma Reservoir near Santa Ynez."
CHEMICAL DATA: Water Year 1998.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (U.S. Bureau of Reclamation benchmark). Prior to Oct. 1, 1965, nonrecording gage.
COOPERATION - Reservoir elevation, contents, and diversion figures provided by U.S. Bureau of Reclamation. Contents not rounded to U.S. Geological Survey standards.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 221,100 acre-ft, Feb. 24, 1969, elevation, 755.11 ft; minimum since initial filling in April 1958, 27,681 acre-ft, Feb. 27, 1991, elevation, 661.06 ft.