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Water-Year Summary for Site 11108133

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Available Parameters
00054 Reservoir storage(Obs.)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
11108133 Castaic Lake near Castaic, CA
LOCATION - Lat 34°31'22", long 118°36'43" referenced to North American Datum of 1927, in NW 1/4 NE 1/4 sec.13, T.5 N., R.16 W., Los Angeles County, CA, Hydrologic Unit 18070102, in intake tower in Castaic Lake, and 2.3 mi north of Castaic.
DRAINAGE AREA - 137 mi². excludes 18.1 mi² noncontributing area in Elizabeth Canyon Creek Basin.
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 the 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.
REMARKS - Lake is formed by earth-fill dam. Storage began April 1972. Dead storage below outlet tower to downstream distribution system, 1,799 acre-ft, elevation, 1,213 ft. Capacity below spillway level, 323,700 acre-ft, elevation, 1,515 ft. Lake receives West Branch California Aqueduct water diverted from Pyramid Lake (station 11109520) via Castaic Powerplant to Elderberry Forebay (station 11108092). Water is released downstream through Castaic Tunnel No. 1 and to Castaic Lagoon. Records represent total contents. See schematic diagram of Santa Clara River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - (at 2400 hours) Maximum contents, 322,962 acre-ft, Mar. 25, 1998, elevation, 1,514.67 ft; minimum, 142,325 acre-ft, Jan. 7, 1995, elevation, 1,415.48 ft.