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Water-Year Summary for Site 11077500

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Available Parameters
00060 Discharge(Mean)  

Water year 2021: 2020-10-01 to 2021-09-30

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USGS Water-Year Summary 2021
11077500 Santiago Creek at Santa Ana, CA
LOCATION - Lat 33°46'13", long 117°53'01" referenced to North American Datum of 1927, in SW 1/4 NW 1/4 sec.01, T.5 S., R.10 W., Orange County, CA, Hydrologic Unit 18070203, on left bank, 500 ft upstream from Bristol Street Bridge at Santa Ana, and 2,125 ft upstream from mouth at Santa Ana River.
DRAINAGE AREA - 98.6 mi².
REVISIONS HISTORY - WSP 1635: 1934, 1935 (instantaneous maximum discharge), 1936. WSP 1928: Drainage area.
PERIOD OF RECORD - October 1928 to current year. Monthly discharge only October to December 1928, published in WSP 1315-B.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 120 ft above NGVD of 1929, from topographic map. Prior to Sept. 8, 1969, at site 0.1 mi upstream at different datum. Sept. 9, 1969, to July 21, 1976, at site 50 ft downstream at different datum. July 22, 1976, to Sept. 30, 1993, at site 77 ft upstream at datum 5.25 ft lower. October 1993 to December 2003 at site 500 ft downstream at the same datum.
REMARKS - Gage out of operation from Aug. 8 to Dec. 18, 2002, for bridge construction. Flow regulated since December 1931 by Santiago Reservoir, capacity, 25,000 acre-ft; since January 1963 by Villa Park Flood-Control Reservoir, capacity, 15,500 acre-ft, and affected by intervening gravel pits. Diversions upstream from station by Irvine Company and Serrano and Carpenter Irrigation Districts. See schematic diagram of Santa Ana River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 6,600 ft³/s, Feb. 25, 1969, gage height, 9.10 ft, site and datum then in use, maximum gage height, 15.14 ft, Oct. 20, 2004; no flow for many days each year.