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USGS Water-Year Summary 2024
11072100 Temescal Creek above Main Street, at Corona, CA
LOCATION - Lat 33°53'21", long 117°33'43" referenced to North American Datum of 1927, Riverside County, CA, Hydrologic Unit 18070203, in La Sierra Grant, on right bank, 500 ft upstream from Main Street Bridge in Corona, and 1.5 mi upstream from topographic boundary of Prado Flood-Control Basin.
DRAINAGE AREA - 224 mi². excludes 768 mi² above Lake Elsinore.
REVISIONS HISTORY -
On January 23, 2015, discharge records were revised for the period of September 10, 2013 to October 5, 2014.
Period October 4, 2018 to October 1, 2019 was accidentally approved in Aquarius Time-Series with no Analysis record.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1980 to July 1983, February 1984 to current year.
GAGE - Water-stage recorder and concrete-lined flood-control channel. Datum of gage 573.23 ft above NAVD of 1988. December 1967 to September 1974, water-stage recorder at site 1.2 mi downstream at different datum (published as station 11072200, "Temescal Creek at Corona"). October 1980 to July 1983 at site 500 ft downstream at different datum.
REMARKS - Flow regulated by several small storage reservoirs. Many diversions upstream from station for irrigation. Water discharged to channel from Arlington Desalter at times since September 1990; records for water years 1981 to 1990 and 1991 to current year are not equivalent. See schematic diagram of Santa Ana River Basin available from the California Water Science Center.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum discharge, 8,850 ft³/s, Feb. 25, 1969, gage height, 8.17 ft, from floodmark, at old site (station 11072200) 1.2 mi downstream on basis of slope-area measurement of peak flow.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 6,140 ft³/s, Feb. 14, 2019, gage height, 7.22 ft, from rating curve on basis of step-backwater 2018 analysis; minimum daily, 0.05 ft³/s, July 24, 2022.
