USGS Water-Year Summary 2023
11048200 Agua Chinon Wash near Irvine, CA
LOCATION - Lat 33°40'44", long 117°42'48" referenced to North American Datum of 1927, Orange County, CA, Hydrologic Unit 18070204, in Lomas de Santiago Grant, on right bank, 4.0 mi east of Irvine, and 4.8 mi upstream from confluence with San Diego Creek.
DRAINAGE AREA - 2.85 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 2002 to December 2, 2015 (discontinued).
GAGE - Water-stage recorder and concrete control. Elevation of gage is 440 ft above NGVD of 1929, from topographic map. Prior to June 9, 2014, at site 1.2 mi downstream at different datum.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 382 ft³/s, Feb. 19, 2005, gage height, 2.95 ft; no flow for many days in most years.
WATER-QUALITY RECORDS
PERIOD OF RECORD -
DISCRETE WATER-QUALITY DATA:
SEDIMENT DATA: Water years 2004 to current year.