Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

* We've detected you're using a mobile device. Find our mobile dedicated web site here.
Click to hideNews Bulletins

Water-Year Summary for Site 11108133

Click to hide Water-Year Summary instructions and information
  • 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.
Available Parameters
00054 Reservoir storage(Obs.)  

Water year 2019: 2019-10-01 to 2020-09-30

Print this page
USGS Water-Year Summary 2019
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.
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.