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Water-Year Summary for Site 10260776

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Available Parameters
00060 Discharge(Mean)  

Water year 2025: 2024-10-01 to 2025-09-30
 
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USGS Water-Year Summary 2025
10260776 East Branch California Aqueduct at Alamo Powerplant, near Gorman, CA
LOCATION - Lat 34°48'56", long 118°41'03" referenced to North American Datum of 1927, in NW 1/4 NE 1/4 sec.04, T.8 N., R.17 W., Los Angeles County, CA, Hydrologic Unit 18090206, in powerplant 2.2 mi downstream from Tehachapi Tunnel on the East Branch California Aqueduct, and 9 mi east of Gorman.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1995 to September 2015 (discontinued). Prior to October 1995 in files of California Department of Water Resources. Published as "Alamo Powerplant" prior to October 1999.
GAGE - Acoustic-velocity meter in penstock and water-stage recorder in bypass flume. Datum of gage is 2,932.5 ft above NGVD of 1929 (levels by California Department of Water Resources).
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.
REMARKS - Upstream the flow splits as it leaves the Tehachapi Tunnel. Flow at this site represents East Branch California Aqueduct water flowing southeast to Silverwood Lake. Flow at this site has three components which are combined for publication: flow through the powerplant, occasional bypass flow through the Alamo Bypass (Cottonwood Chute) and estimated leakage. The West Branch California Aqueduct flows through William Warne Powerplant (station 11109398). See schematic of Santa Clara River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum daily discharge, 5,600 ft³/s, Nov. 21, 2006; no flow at times in some years.