USGS Water-Year Summary 2023
11109520 Pyramid Lake near Gorman, CA
LOCATION - Lat 34°38'41", long 118°45'47" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.02, T.6 N., R.18 W., Los Angeles County, CA, Hydrologic Unit 18070102, in Angeles National Forest, in control structure near left abutment of Pyramid Dam on Piru Creek, and 11.7 mi southeast of Gorman.
DRAINAGE AREA - 295 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1988 to current year. Prior to October 1988 in files of California Department of Water Resources.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929.
COOPERATION - Records were collected by California Department of Water Resources, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2426. Contents not rounded to U.S. Geological Survey standards.
EXTREMES FOR PERIOD OF RECORD - (at 2400 hours) Maximum contents, 171,073 acre-ft, Oct. 6, 2014, elevation, 2,578.91 ft; minimum, 137,883 acre-ft, Nov. 26, 1991, elevation, 2,551.53 ft.