USGS Water-Year Summary for Site 06177000

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

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USGS Water-Year Summary 2023

06177000 MISSOURI RIVER NEAR WOLF POINT, MT

LOCATION - Lat 48°04'02.37", long 105°31'59.15" referenced to North American Datum of 1983, in SW 1/4 NW 1/4 sec.28, T.27 N., R.48 E., McCone County, MT, Hydrologic Unit 10060001, on right bank 500 ft downstream from bridge on State Highway 13, 5 mi southeast of Wolf Point, 7.8 mi downstream from Wolf Creek, and at river mile 1,701.4.

DRAINAGE AREA - 80,650 mi².

REVISIONS HISTORY - Water Supply Paper (WSP) 1146: 1931. WSP 1729: Drainage area. WDR MT-2013: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - September 1928 to current year.

GAGE - Water-stage recorder. Datum of gage is 1,968.57 ft, referenced to the National Geodetic Vertical Datum of 1929. April 13, 1930 to March 7, 2012, water-stage recorder at datum 10.00 ft lower. Prior to Apr. 13, 1930, nonrecording gages at Wolf Point ferry landing 5.5 mi upstream at different elevation.

REMARKS - After 1943, flow regulated by Fort Peck Dam and many other reservoirs upstream from station. Numerous diversions for irrigation occur upstream from station.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of June 14, 1908, reached a stage of about 20 ft (site and elevation then in use).

EXTREMES FOR PERIOD PRIOR TO REGULATION - (1929-1939) Annual mean discharge, 7,183 ft³/s, Highest annual mean discharge, 10,300 ft³/s, 1939 Lowest annual mean discharge, 4,891 ft³/s, 1937, Highest daily mean discharge, 56,700 ft³/s, May 23, 1939, Lowest Daily mean discharge, 840 ft³/s, Nov 29, 1937, Annual seven-day minimum, 910 ft³/s, Feb 10, 1938, Maximum peak discharge, 66,800 ft³/s, Mar 25, 1939, Maximum peak stage, 14.40 ft, Mar 25, 1939, Annual runoff 5,204,000 ac-ft.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1949-51, 1961-62, 1965-68, 1970-73, May 2002 to September 2004.

PERIOD OF DAILY RECORD - WATER TEMPERATURE: July 1979 to September 1985, seasonal records May 2002 to September 2004.

INSTRUMENTATION - Temperature recorder installed May 16, 2002. Removed during 2006 WY.

REMARKS -

EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 21.5°C, Aug. 12-14, 2003; minimum, 0.0°C, many days during winter periods.