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Water-Year Summary for Site 06177000

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00060 Discharge(Mean)  

Water year 2020: 2019-10-01 to 2020-09-30

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USGS Water-Year Summary 2020
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.
PERIOD OF RECORD - September 1928 to current year.
GAGE - Water-stage recorder. Elevation 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.
10-01-2019 to 09-30-2020: records are good, except estimated records are poor.
10-01-2018 to 09-30-2019: records are good, except estimated records are poor.
10-01-2017 to 09-30-2018: records are good, except estimated records are poor.
10-01-2016 to 09-30-2017: records are good, except estimated records are poor.
10-01-2015 to 09-30-2016: records are fair, except estimated records are poor.
10-01-2014 to 09-30-2015: records are good, except estimated records are poor. 
10-01-2013 to 09-30-2014: records are good, except estimated records are poor.

After 1943, flow regulated by Fort Peck Dam and many other reservoirs upstream from station. Diversion
for irrigation of about 1,010,400 acres occurs 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.
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 - Several unpublished observations of specific conductance and water temperature were made during the year.
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.