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Water-Year Summary for Site 11235500

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Available Parameters
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
11235500 Portal Powerplant at Huntington Lake, CA
LOCATION - Lat 37°15'25", long 119°09'30" referenced to North American Datum of 1927, in SE 1/4 SW 1/4 sec.05, T.8 S., R.26 E., Fresno County, CA, Hydrologic Unit 18040006, in Sierra National Forest, in powerplant at tunnel outlet at east end of Huntington Lake, 0.9 mi east of Lakeshore Post Office, and 6 mi northeast of town of Big Creek.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1927 to current year. Monthly discharge only for some periods, published in WSP 1315-A. Prior to October 1960, published as "Ward Tunnel at Outlet" and October 1960 to September 1991 as "Ward Tunnel Outlet at Huntington Lake."
GAGE - Acoustic-velocity meter in tunnel since Dec. 1, 1987. Elevation of gage is 6,980 ft above NGVD of 1929, from topographic map. November 1927 to May 23, 1956, water-stage recorder at datum 19.00 ft higher (levels by Southern California Edison Co.). May 24, 1956, to Sept. 30, 1968, no recorder, see REMARKS below. Oct. 1, 1968, to Nov. 30, 1987, pressure-differential recorder recorded discharge through penstock.
COOPERATION - Records were collected by Southern California Edison Co., under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2174.
REMARKS - Daily discharge for the period May 24, 1956, to Sept. 30, 1968, computed as the sum of Ward Tunnel at Intake, Mono-Bear Conduit, Camp Creek Conduit, and corrected for change in contents of Portal Forebay. Powerplant receives water from Florence Lake (station 11229600) via Ward Tunnel, receives diversions from Bear and Mono Creeks (stations 11230520 and 11231550), and at times from several other small tributaries to South Fork San Joaquin River. See schematic diagram of lower San Joaquin River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum daily discharge, 2,080 ft³/s, June 21, 1935; no flow at times in many years.