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Water-Year Summary for Site 11075800

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Available Parameters
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 

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USGS Water-Year Summary 2023
11075800 Santiago Creek at Modjeska, CA
LOCATION - Lat 33°42'32", long 117°38'05" referenced to North American Datum of 1927, in SE 1/4 NW 1/4 sec.29, T.5 S., R.7 W., Orange County, CA, Hydrologic Unit 18070203, on right bank, 5 ft upstream from Modjeska Canyon Road bridge, at intersection with Markuson Road, 0.4 mi downstream from Harding Canyon Creek, and 0.3 mi west of Modjeska
DRAINAGE AREA - 12.5 mi².
REVISIONS HISTORY - WDR CA-73-1: 1969. WDR CA-86-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1961 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 1,340 ft above NGVD of 1929, from topographic map. Prior to Sept. 10, 1969, datum approximately 48 ft higher. Sept. 10, 1969 to Feb. 6, 1985, at datum approximately 44 ft higher. Feb. 7, 1985 to Nov. 2, 2011 at datum 44 ft lower.
REMARKS - Slight regulation by Modjeska Reservoir on Harding Creek. Santiago County Water District diverts water at Modjeska Reservoir on Harding Creek. See schematic diagram of Santa Ana River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 6,520 ft³/s, Feb. 25, 1969, gage height, 6.18 ft, site and datum then in use, from rating curve extended above 840 ft³/s, on basis of slope-area measurement of peak flow, maximum gage height, 12.59 ft, Feb. 14, 2019; no flow at times in most years.