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USGS Water-Year Summary 2024
11147500 Salinas River at Paso Robles, CA
LOCATION - Lat 35°37'43", long 120°41'00" referenced to North American Datum of 1927, San Luis Obispo County, CA, Hydrologic Unit 18060005, in Paso de Robles Grant, on left bank, at upstream side of 13th Street Bridge in town of Paso Robles, 3.5 mi upstream from Huerhuero Creek, and 8 mi upstream from Estrella River.
DRAINAGE AREA - 390 mi².
REVISIONS HISTORY - WSP 981: 1942. WDR US-2007: 2006.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1939 to September 1965, October 1969 to current year.
CHEMICAL DATA: Water years 1963-66.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 660.61 ft above NGVD of 1929 and 663.35 ft above NAVD of 1988. Prior to June 14, 1951, nonrecording gage at same site at datum 10 ft higher. Datum was lowered by 10 ft on Oct. 22, 2008, to account for substantial streambed scour after bridge construction.
REMARKS - Low flows regulated by Santa Margarita Lake, 32 mi upstream, beginning in December 1941, usable capacity, 23,000 acre-ft. Small diversions for irrigation upstream from station. See schematic diagram of Salinas River Basin available from the California Water Science Center.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Jan. 25, 1969, reached a stage of 23.8 ft at datum then in use, from floodmarks, discharge, 28,000 ft³/s.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 28,400 ft³/s, Mar. 10, 1995, gage height, 22.99 ft at datum then in use, maximum gage height, 24.46 ft at current datum, Feb. 07, 2017. No flow for many days most years.
