USGS Water-Year Summary 2024

11123500 Santa Ynez River below Los Laureles Canyon, near Santa Ynez, CA

LOCATION - Lat 34°32'37", long 119°51'50" referenced to North American Datum of 1927, Santa Barbara County, CA, Hydrologic Unit 18060010, in San Marcos Grant, on left bank, 0.3 mi downstream from Los Laurels Canyon Creek, 10 mi downstream from Gibraltar Reservoir, and 13.3 mi east of Santa Ynez.

DRAINAGE AREA - 277 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - April 1947 to current year. Monthly discharge only for some periods, published in WSP 1315-B.

GAGE - Water-stage recorder. Datum of gage is 796.94 ft above NAVD of 1988. 

REMARKS - Flow regulated by Jameson Lake and Gibraltar Reservoir (stations 11121000 and 11122000). Water diverted out of basin from these reservoirs to cities of Montecito and Santa Barbara for municipal supply. Low flow affected by intermittent pumping for irrigation from infiltration gallery in riverbed at station. Satellite telemeter at station. See schematic diagram of Santa Ynez River Basin available from the California Water Science Center.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 67,500 ft³/s, Jan. 25, 1969, gage height, 18.88 ft, from rating curve extended above 11,600 ft³/s, on basis of peak flow for station below Gibraltar Dam plus tributary inflow; no flow for many days in most years.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

DISCRETE WATER-QUALITY DATA:
CHEMICAL DATA: Water years 1973-89, 1991-2012, 2017 to current year.

REMARKS - Discrete water-quality sample results and supporting metadata are published on NWISweb. Data-Quality Indicator Code of "R" indicates reviewed and approved data. DQI Status of "S" indicates provisional data.