USGS Water-Year Summary for Site 11362500

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

11362500 Pit River below Pit No. 4 Dam, CA

LOCATION - Lat 40°58'25", long 121°46'42" referenced to North American Datum of 1927, Shasta County, CA, Hydrologic Unit 18020003, unsurveyed, in Shasta National Forest, on right bank, 0.2 mi downstream from unnamed tributary, 0.6 mi downstream from Ruling Creek, 1.3 mi downstream from Pit No. 4 Dam, and 2.7 mi downstream from Pit No. 3 Powerplant.

DRAINAGE AREA - 4,648 mi². excluding Goose Lake Basin.

REVISIONS HISTORY - WSP 843: 1935 (instantaneous maximum discharge). WSP 1315-A: 1928 (instantaneous maximum discharge). WDR CA-75-4: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - May 1922 to current year. Monthly discharge only for some periods, published in WSP 1315-A. Published as "near Pecks Bridge" April to October 1922, and as "at Lindsay Flat" November 1922 to June 1927.

GAGE - Water-stage recorder. Elevation of gage is 2,358 ft above NGVD of 1929, from river-profile map. Prior to November 1922, water-stage recorder at site at Pecks Bridge 7.4 mi upstream at different datum. November 1922 to June 20, 1927, at site at Lindsay Flat 1.8 mi upstream at different datum. June 20, 1927, to Sept. 5, 1990, at site 200 ft downstream at datum 0.15 ft lower.

COOPERATION - Records, including discharge for Pit No. 3 Powerplant (station 11362300) and Pit No. 4 Powerplant (station 11362600), provided by Pacific Gas and Electric Co., under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 233.

REMARKS - Low flow completely regulated by small reservoirs and powerplants, total usable reservoir capacity, 253,000 acre-ft. Many diversions upstream from station; diversion to Pit No. 4 Powerplant began June 9, 1955. See schematic diagram of Pit River and McCloud River Basins available from the California Water Science Center.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 33,700 ft³/s, Feb. 20, 1986, gage height, 18.70 ft; minimum daily prior to diversion to Pit No. 4 Powerplant in 1955, 234 ft³/s, Sept. 13, 1953; minimum daily since diversion to Pit No. 4 Powerplant, 22 ft³/s, Dec. 2-4, 1969.