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Water-Year Summary for Site 11471099

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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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
11471099 Potter Valley Powerhouse Tailrace near Potter Valley, CA
LOCATION - Lat 39°21'42", long 123°07'38" referenced to North American Datum of 1927, in SW 1/4 NW 1/4 sec.06, T.17 N., R.11 W., Mendocino County, CA, Hydrologic Unit 18010110, 100 ft downstream from powerhouse of Pacific Gas and Electric Co., 1.8 mi southwest of Van Arsdale Dam, and 2.9 mi northwest of town of Potter Valley.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1987 to current year. October 1931 to September 1984, record published for Potter Valley Powerhouse Intake (station 11471000) not equivalent because diversion for irrigation is included.
GAGE - Discharge computed as difference between Potter Valley Powerhouse Intake (station 11471000) and the combined flows of Potter Valley Irrigation District East Canal (station 11471105) and Potter Valley Irrigation District West Canal (station 11471106). Elevation of tailrace is 1,020 ft above NGVD of 1929, from topographic map.
COOPERATION - Records collected by Pacific Gas and Electric Co., under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 77.
REMARKS - Flow represents inflow into the Russian River Basin after passing through powerhouse. See schematic diagrams of Russian River Basin and Eel River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum daily discharge, 335 ft³/s, Mar. 19, 20, 22, 23, 1998; no flow at times in several years.