USGS Water-Year Summary 2021
12352500 BITTERROOT RIVER NEAR MISSOULA, MT
LOCATION - Lat 46°49'54.26", long 114°03'17.50" referenced to North American Datum of 1983, in SW 1/4 NW 1/4 NE 1/4 sec.01, T.12 N., R.20 W., Missoula County, MT, Hydrologic Unit 17010205, on right bank 40 ft downstream from bridge on U.S. Highway 93, 0.5 mi south of Fort Missoula, and at river mile 5.7.
DRAINAGE AREA - 2,824 mi².
PERIOD OF RECORD - July 1898 to November 1901, May 1903 to December 1904, July 1989 to current year.
GAGE - Water-stage recorder. Elevation of gage is 3,110 ft, referenced to the North American Vertical Datum of 1988. Prior to Jan. 1, 1905, nonrecording gage at site 1.5 mi upstream at different elevation.
PERIOD OF RECORD - May 1997 to October 2013. June 2015 to current year.
PERIOD OF DAILY RECORD -
INSTRUMENTATION - Water temperature probe was replaced Feb. 24, 2015.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum daily, 26.0°C, July 23, 2006 and July 14, 2007; minimum daily, 0.0°C, many days during winter months.