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USGS Water-Year Summary 2024
13032500 SNAKE RIVER NEAR IRWIN, ID
LOCATION - Lat 43°21'03", long 111°13'08" referenced to North American Datum of 1983, in sec.07, T.1 S., R.45 E., Bonneville County, ID, Hydrologic Unit 17040104, Palisades Dam quad., on right bank at U.S. Bureau of Reclamation headquarters, 1.5 mi downstream from Palisades Dam, 2 mi upstream from Palisades Creek, 5 mi southeast of Irwin, and at mile 900.2.
DRAINAGE AREA - 5,225 mi².
REVISIONS HISTORY - Discharge for the period March 29, 2021 to April 12, 2021 was revised on December 16, 2021, based on changes to the shifted stage-discharge rating.
SURFACE-WATER RECORDS
PERIOD OF RECORD - March to October 1935, April to October 1936, May 1949 to current year. Records for station "at Calamity Point, near Irwin" April to August 1934, April to October 1935, April to October 1936, March 1939 to September 1941, are equivalent to those for this station.
GAGE - Water-stage recorder and temperature recorder. Datum of gage is 5,356.67 feet above NAVD 1988 (USGS). Mar. 30, 1935 to Oct. 31, 1936, water-stage recorder at site 3.5 mi downstream at different datum. May 1, 1949 to Mar. 22, 1950, nonrecording gage at site 1,100 ft downstream at datum 1.9 ft higher.
REMARKS - Flow regulated by Jackson Lake and Palisades Reservoir. Diversion from tributaries above station for irrigation in Wyoming and Idaho of about 95,300 acres (1966 determination).
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in early June 1894 may have been higher than that of June 19-22, 1997.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 40,400 ft³/s June 19-22, 1997; maximum gage height, 15.25 ft, June 19, 20, 1997; minimum, 19 ft³/s Nov. 8, 1956, result of discharge measurement.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Continuous water temperature data were collected May 1977 to September 1979, October 2004 to September 2015 (discontinued).
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURES: Maximum, 18.5 °C Aug. 22, 1977; minimum, 0.0 °C on many days during winter months of 1978.
