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Water-Year Summary for Site 06174500

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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.
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Available Parameters
00060 Discharge(Mean)  

Water year 2019: 2018-10-01 to 2019-09-30

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USGS Water-Year Summary 2019
LOCATION - Lat 48°07'48.19", long 106°21'51.53" referenced to North American Datum of 1983, in NE 1/4 NE 1/4 sec.1, T.27 N., R.41 E., Valley County, MT, Hydrologic Unit 10050012, on right bank at downstream side of former highway bridge site, 0.6 mi southwest of Nashua, 2.0 mi upstream from Porcupine Creek, and at river mile 22.7.
DRAINAGE AREA - 22,452 mi² of which 2,198 mi² probably is noncontributing.
Water Supply Paper 1729: Drainage area.
Peak discharge and corresponding gage height for the 1984 water year were revised on January 22, 2020, to correct error found during reanalysis of data.
PERIOD OF RECORD - October 1939 to current year.
GAGE - Water-stage recorder. Elevation of gage is 2,027.75 ft, referenced to the National Geodetic Vertical Datum of 1929.
10/01/2018 to 09/30/2019: records are good, except October 1 to March 28 and May 7 to September 30 which are fair and estimated records, which are poor.
10/01/2017 to 09/30/2018: records are good, except April 18 to May 7 which are fair and estimated records, which are poor.
10/01/2016 to 09/30/2017: records are fair, except estimated records, which are poor.
10/01/2015 to 09/30/2016: records are fair, except estimated records, which are poor.
10/01/2014 to 09/30/2015: records are fair, except estimated records, which are poor.  
10/01/2013 to 09/30/2014: records are good, except estimated records, which are poor. 

Flow increased during irrigation season by water from St. Mary Canal which diverts from the St. Mary 
River near Babb. Flow is regulated by Fresno Reservoir (station number 06136500), two reservoirs in 
Lodge Creek basin in Saskatchewan, and four reservoirs in Frenchman River basin in Saskatchewan. 
Diversions for irrigation include about 140,000 acres upstream from station.