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Water-Year Summary for Site 11363920

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Available Parameters
00054 Reservoir storage(Obs.)  

Water year 2020: 2020-10-01 to 2021-09-30

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USGS Water-Year Summary 2020
11363920 Iron Canyon Reservoir near Big Bend, CA
LOCATION - Lat 41°02'32", long 121°58'55" referenced to North American Datum of 1927, in SW 1/4 SE 1/4 sec.21, T.37 N., R.1 W., Shasta County, CA, Hydrologic Unit 18020003, Shasta National Forest, in control house on left bank 500 ft upstream from Iron Canyon Dam on Iron Canyon Creek, and 3.7 mi northwest of Big Bend.
DRAINAGE AREA - 11.1 mi².
PERIOD OF RECORD - December 1965 to current year (monthend contents only).
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by Pacific Gas and Electric Co.).
COOPERATION - Record of contents collected by Pacific Gas and Electric Co., under general supervision of the U.S. Geological Survey, in connection with a Federal Energy Regulatory Commission project no. 2106. Contents not rounded to U.S. Geological Survey standards prior to water year 2003 and for water year 2012.
REMARKS - Reservoir is formed by a rock-fill dam completed in 1965. Usable capacity, 24,197 acre-ft, between elevations 2,525.00 ft, invert of sluice pipe, and 2,665.00 ft, crest of spillway. Dead storage, 44 acre-ft. Normal operating pool is from elevation 2,565.0 ft, capacity, 990 acre-ft, to 2,664.0 ft, capacity, 23,738 acre-ft. Water is diverted from Lake McCloud (station 11367740) through a tunnel to Iron Canyon Reservoir and then into the Pit River via James B. Black Powerplant (station 11363910). Figures given represent total contents. Water is used for power generation and recreation. See schematic diagram of Pit River and McCloud River Basins available from the California Water Science Center. Contents based on Capacity Table # 1, dated 1965.
EXTREMES FOR PERIOD OF RECORD - (at 2400 hours) Maximum contents, 23,539 acre-ft, May 16, 22, 1977, elevation, 2,663.60 ft; normal minimum since reservoir first filled, 2,860 acre-ft, May 23, 24, 29, June 2, 7, 9, 14, 23, 24, 1966, elevation, 2,590.00 ft. Contents reduced to 195 acre-ft, elevation, 2,540.00 ft, Feb. 10, 1971, when reservoir was drained for inspection.