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Water-Year Summary for Site 06066500

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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
00010 Temperature, water(Max.,Min.,Mean)  
00060 Discharge(Mean)  

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

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USGS Water-Year Summary 2023
LOCATION - Lat 46°59'41.06", long 112°00'38.40" referenced to North American Datum of 1983, in NE 1/4 SW 1/4 SE 1/4 sec.5, T.14 N., R.3 W., Lewis and Clark County, MT, Hydrologic Unit 10030102, on left bank 0.4 mi downstream from Holter Dam, 2.8 mi southeast of Wolf Creek, and at river mile 2,210.7.
DRAINAGE AREA - 16,924 mi².
PERIOD OF RECORD - October 1945 to current year.
GAGE - Water-stage recorder. Elevation of gage is 3,464.11 ft, referenced to the National Geodetic Vertical Datum of 1929.
REMARKS - Flow is regulated by nine smaller irrigation reservoirs and powerplants, Clark Canyon Reservoir (station number 06015300), and Canyon Ferry Lake (station number 06058500). Numerous diversions for irrigation occur above station.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: October 1999 to current year.
INSTRUMENTATION - Water temperature probe was installed Sept. 30, 1999.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 22.5°C, July 27, 2007; minimum, 0.5°C, many days in winter months.