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Water-Year Summary for Site 13062500

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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
13062500 SNAKE RIVER AT BLACKFOOT, ID
LOCATION - Lat 43°11'51", long 112°22'09" referenced to North American Datum of 1983, in sec.33, T.2 S., R.35 E., Bingham County, ID, Hydrologic Unit 17040206, Blackfoot quad., on left bank immediately upstream from old Riverside Highway bridge, 0.25 mi downstream from new U.S. Highway 26 bridge, 1.2 mi west of Blackfoot, and at mile 764.3.
DRAINAGE AREA - 9,950 mi².
REVISIONS HISTORY - NWISWeb: 2014 daily discharges Feb. 25 to May 5.
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 1978 to current year. Records for May 1924 to September 1932 at site downstream, published as "Snake River below Blackfoot Bridge, near Blackfoot", are not equivalent because diversions were not included.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 4,469.81 feet above NAVD 1988 (USGS). May 1924 to Sept. 1932, water-stage recorder at site downstream at different datum.
REMARKS - Flow regulated by Jackson Lake, Palisades Reservoir, Henrys Lake, Island Park Reservoir, and Grassy Lake, having a combined capacity of 2,570,000 acre-ft. Diversions above station for irrigation of about 750,000 acres. Considerable water leaks above the station into the Snake River Plain aquifer.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 43,200 ft³/s June 17, 1997, gage height, 13.55 ft; maximum gage height, 14.71 ft, Feb. 7, 1985, result of backwater from ice; minimum discharge, 2.7 ft³/s Apr. 29, 1992, gage height, 0.91 ft, caused by irrigation diversions.