USGS Water-Year Summary for Site 11367800

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

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USGS Water-Year Summary 2023

11367800 McCloud River at Ah-Di-Na, near McCloud, CA

LOCATION - Lat 41°06'39", long 122°05'42" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 sec.33, T.38 N., R.2 W., Shasta County, CA, Hydrologic Unit 18020004, in Shasta National Forest, on right bank at Ah-Di-Na, 1.8 mi downstream from Squirrel Creek, 3.9 mi downstream from McCloud Dam, and 9.6 mi south of McCloud.

DRAINAGE AREA - 427 mi².

REVISIONS HISTORY - WDR CA-98-4: 1997 (daily minimum).

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1964 to current year.

GAGE - Water-stage recorder. Elevation of gage is 2,160 ft above NGVD of 1929, from topographic map.

COOPERATION - Records were 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. 2106.

REMARKS - Low flow completely regulated by Lake McCloud (station 11367740) 3.9 mi upstream since November 1965. Diversion to Iron Canyon Reservoir (station 11363920) through McCloud-Iron Canyon diversion tunnel (station 11367720) started Dec. 1, 1965. This station records fishwater release. The minimum release requirements range from 160 to 210 ft³/s per schedule outlined in Federal Energy Regulatory Commission License 2106. See schematic diagram of Pit River and McCloud River Basins available from the California Water Science Center.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Dec. 21, 1955, reached a stage of 12.5 ft, discharge, 17,800 ft³/s, from rating curve extended above 2,500 ft³/s.

EXTREMES FOR PERIOD OF RECORD - Prior to completion of McCloud Dam in 1965, maximum discharge, 9,660 ft³/s, Dec. 22, 1964, gage height, 9.43 ft, from rating curve extended above 2,500 ft³/s; minimum daily, 86 ft³/s, Oct. 1-26, 1964. Since completion of McCloud Dam, maximum discharge, 31,700 ft³/s, Jan. 1, 1997, gage height, 14.77 ft, from rating curve extended above 8,000 ft³/s on basis of slope-area measurement of peak flow; minimum daily, 41 ft³/s, Dec. 18-20, 1971 (caused by valve malfunction at McCloud Dam).