USGS Water-Year Summary for Site 11365000

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	00060 Discharge(Mean)

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

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USGS Water-Year Summary 2023

11365000 Pit River near Montgomery Creek, CA

LOCATION - Lat 40°50'38", long 122°00'05" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 sec.32, T.35 N., R.1 W., Shasta County, CA, Hydrologic Unit 18020003, Shasta National Forest, on left bank, 0.7 mi downstream from Pit No. 7 Dam and Powerplant, 1.4 mi upstream from Potem Creek, and 4.1 mi west of town of Montgomery Creek.

DRAINAGE AREA - 4,952 mi². excluding Goose Lake Basin.

REVISIONS HISTORY - Water Year Summary 2017: 2017 NWISWEB (discharges). On Apr. 20, 2018, discharge records were revised for the period May 26 to Jun. 3, 2017 and Jun. 5, 2017 to Sep. 30, 2017.

WSP 1931: Drainage area. WDR CA-86-4: 1983 (instantaneous maximum discharge).

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1944 to current year (monthly discharge only December 1964 to May 1965). Monthly discharge only for some periods, published in WSP 1315-A. CHEMICAL DATA: Water years 1951, 1953, 1955-81. WATER TEMPERATURE: Water years 1951, 1954-57, 1959.

GAGE - Water-stage recorder. Datum of gage is 1,000.00 ft above NGVD of 1929 (levels by Pacific Gas and Electric Co.). October 1944 to Feb. 17, 1963, at site 0.7 mi upstream at different datum. Feb. 17, 1963, to May 21, 1965, at site 1.5 mi upstream at different datum. May 21, 1965, to June 20, 1981, at site 0.9 mi downstream at datum 36.00 ft higher.

COOPERATION - Records, including contents at end of month for Pit No. 6 Reservoir (station 11364100), discharge for Pit No. 6 Powerplant (station 11364150), and contents at end of month for Pit No. 7 Reservoir (station 11364700), provided by Pacific Gas and Electric Company, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2106.

REMARKS - Low flow completely regulated by many reservoirs and powerplants, total usable reservoir capacity, 337,000 acre-ft. Many diversions upstream from station for irrigation. Diversion from McCloud River to Iron Canyon Reservoir (station 11363920) began December 1965. See schematic diagram of Pit River and McCloud River Basins available from the California Water Science Center.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 73,000 ft³/s, Jan. 24, 1970, gage height, 32.36 ft, site and datum then in use, maximum gage height, 74.65 ft, Feb. 19, 1986; minimum daily, 30 ft³/s, July 12, 27, 1975, result of construction work below Pit No. 7 Powerplant.