USGS Water-Year Summary 2021
11085000 San Gabriel River below Santa Fe Dam, near Baldwin Park, CA
LOCATION - Lat 34°06'44", long 117°58'07" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 sec.06, T.1 S., R.10 W., Los Angeles County, CA, Hydrologic Unit 18070106, on left bank, at stilling basin of outlet of Santa Fe Flood-Control Dam, 500 ft downstream from axis of dam, and 1.7 mi north of Baldwin Park.
DRAINAGE AREA - 236 mi².
- WSP 1315-B and 1635: 1943 (instantaneous maximum discharge). WSP 1928: Drainage area. WDR CA-99-1: 1998.
PERIOD OF RECORD - October 1942 to current year.
GAGE - Water-stage recorder. Auxiliary gage 500 ft downstream with crest-stage gage and concrete control. Datum of gage is 400.00 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers).
COOPERATION - Records of diversion to Rio Hondo provided by Los Angeles County Department of Public Works.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 30,900 ft³/s, Jan. 26, 1969, gage height, 22.20 ft; no flow for many days each year.