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Water-Year Summary for Site 12323250

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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.
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Available Parameters
00060 Discharge(Mean)  

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

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USGS Water-Year Summary 2023
LOCATION - Lat 45°59'47.67", long 112°33'48.56" referenced to North American Datum of 1983, in SW 1/4 SE 1/4 NW 1/4 sec.23, T.3 N., R.8 W., Silver Bow County, MT, Hydrologic Unit 17010201, on right bank at Interstate 90 overpass in Butte, 0.8 mi upstream from Whiskey Gulch, 1.3 mi downstream from Blacktail Creek, and at river mile 20.2.
DRAINAGE AREA - 124.75 mi².  
REVISIONS HISTORY - Water Data Report (WDR) MT-92-1: 1984-90, maximum discharge. WDR-MT-98-1: Drainage area. WDR-MT-2000-1: Drainage area. WDR MT-2013: Drainage area.
PERIOD OF RECORD - October 1983 to current year.
GAGE - Water-stage recorder. Elevation of gage is 5,409.47 ft referenced to the National Geodetic Vertical Datum of 1929. October 1983 to Sept. 14, 1997, water-stage recorder 150 ft upstream at elevation 1.40 ft higher. Sept. 15, 1997 to Dec. 3, 1997, no gage in operation due to channel reconstruction during EPA Superfund cleanup operations. Dec. 3, 1997 to Aug. 16, 1999, water-stage recorder 0.8 mi downstream at different elevation. Site was operated Aug. 16, 1999 to May 10, 2000 and April 18, 2019 to April 29, 2021, water-stage recorder 2.1 mi downstream at different elevation.
REMARKS - Flow is slightly regulated by Silver Bow County sewage treatment plant; and beginning Oct. 1, 2019 to present, flow is generally affected by Atlantic Richfield Company Mine discharge.
PERIOD OF RECORD - March 1993 to August 1995, December 1996 to current year.