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Water-Year Summary for Site 12370000

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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: 2023-10-01 to 2024-09-30

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USGS Water-Year Summary 2023
LOCATION - Lat 48°01'27.23", long 113°58'43.75" referenced to North American Datum of 1983, in SH 1/4 SW 1/4 sec.11, T.26 N., R.19 W., Lake County, MT, Hydrologic Unit 17010211, on left bank 0.2 mi downstream from Johnson Creek, 0.4 mi downstream from Swan Lake, 5.1 mi southeast of Bigfork, and at river mile 14.0.
DRAINAGE AREA - 672 mi².
REVISIONS HISTORY - WSP 1216: Drainage area. WSP 1246: 1923-24, maximum discharge; 1930. WSP 1316: 1923.
PERIOD OF RECORD - May 1922 to current year. Monthly discharges only for May 1922 to December 1950 are published in Water Supply Paper (WSP) 1316.
GAGE - Water-stage recorder. Elevation of gage is 3,062.6 ft, referenced to National Geodetic Vertical Datum of 1929 (from river-profile survey). Oct. 10, 1910, to May 22, 1911, nonrecording gage at site 10 mi upstream at different elevation. Apr. 28, 1922, to Oct. 14, 1930, nonrecording gage at site 800 ft upstream at elevation 1.9 ft higher. U.S. Geological Survey satellite telemeter is located at the station.
REMARKS - Diversions for irrigation occur upstream from station.
PERIOD OF RECORD - WATER TEMPERATURE: May 1999 to September 2003.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: October 1999 to September 2003.
INSTRUMENTATION - Temperature recorder installed August 1999.
REMARKS - Daily water temperature records excellent.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE:  Maximum daily, 23.5°C, July 2, 27-31, August 1, 2, 2003; minimum daily, 0.0°C, many days during winter months.