Click
to
hide
Water-Year
Summary
instructions
and
information
- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
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. Datum of gage is 1,251.01 ft above NAVD of 1988. 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.
