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- 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
11047300 Arroyo Trabuco at San Juan Capistrano, CA
LOCATION - Lat 33°29'54", long 117°39'54" referenced to North American Datum of 1927, in SW 1/4 SE 1/4 sec.01, T.8 S., R.8 W., Orange County, CA, Hydrologic Unit 18070301, on left bank, 30 ft downstream from Del Obispo Street Bridge, in San Juan Capistrano.
DRAINAGE AREA - 54.1 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1972 to September 1977, October 1983 to September 1989, October 1995 to current year.
WATER TEMPERATURE: Water years 1971-77, 1984.
SEDIMENT DATA: Water Years 1971-77, 1984-93.
GAGE - Water-stage recorder, crest-stage gage, and concrete control. Datum of gage is 65.28 ft. above NAVD of 1988.
REMARKS - No regulation or diversion upstream from station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 10,000 ft³/s, Feb. 23, 1998, gage height, 19.81 ft, from rating curve extended above 1,600 ft³/s; no flow at times in some years.
