USGS Water-Year Summary 2022
11046100 Las Flores Creek near Oceanside, CA
LOCATION - Lat 33°17'37", long 117°27'11" referenced to North American Datum of 1983, in SE 1/4 NE 1/4 sec.24, T.10 S., R.6 W., San Diego County, CA, Hydrologic Unit 18070301, on Camp Joseph H. Pendleton Naval Reservation, at right bank, west of Stuart Mesa Road, 0.75 mi upstream from mouth, and 8.0 mi northwest of Oceanside.
DRAINAGE AREA - 26.1 mi².
- WDR CA-72-1: 1971 (instantaneous maximum discharge).
PERIOD OF RECORD - May 1951 to September 1967, October 1969 to September 1979, October 1993 to current year. Discharge records for October 1967 to September 1969 and October 1979 to September 1993 available in files of U.S. Marine Corps at Camp Pendleton.
GAGE - Water-stage recorder and multiple concrete culvert control. Elevation of gage is 35 ft above NGVD of 1929, from topographic map.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Feb. 25, 1969, reached a stage of 7.25 ft, from floodmarks, discharge, 4,200 ft³/s.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 7,300 ft³/s, estimated, Mar. 4, 1978, gage height, 13.67 ft, from floodmarks, based on culvert computation of peak flow; no flow for several days in most years.