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Water-Year Summary for Site 06040800

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

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USGS Water-Year Summary 2019
LOCATION - Lat 45°29'11.74", long 111°38'01.89" referenced to North American Datum of 1983, in NW 1/4 NE 1/4 SW 1/4 sec.17, T.4 S., R.1 E., Madison County, MT, Hydrologic Unit 10020007, on right bank 160 ft upstream from Madison powerplant, 1.4 mi downstream from Ennis Lake, 5.6 mi northeast of McAllister, and at river mile 38.9.
DRAINAGE AREA - 2,150.2 mi².
PERIOD OF RECORD - April 2002 to current year.
GAGE - Water-stage recorder. Elevation of gage is 4,690 ft, referenced to the North American Vertical Datum of 1988.
11-05-2017 to 11-18-2018: records are fair, except estimated records are poor.
11-04-2016 to 11-04-2017: records are fair, except estimated records are poor.
10-05-2015 to 11-03-2017: records are fair, except estimated records are poor.
11-06-2014 to 10-04-2015: records are good. 
10-30-2013 to 11-05-2014: records are good. 

Flow is regulated by Hebgen Lake (station number 06038000) and Ennis Lake (station number 06040500). 
Diversions for irrigation of about 23,000 acres occur upstream from station. Flow through Madison 
Powerplant bypasses the station.