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Water-Year Summary for Site 12325500

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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 2021: 2021-10-01 to 2022-09-30

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USGS Water-Year Summary 2021
LOCATION - Lat 46°13'57.60", long 113°17'59.54" referenced to North American Datum of 1983, in SE 1/4 NW 1/4 sec.36, T.6 N., R.14 W., Granite County, MT, Hydrologic Unit 17010202, on right wing wall of weir, 0.5 mi downstream from power plant, 2.0 mi downstream from Georgetown Dam, 3.5 mi northwest of Southern Cross, 6.8 mi south of Philipsburg, and at river mile 36.8.

Water Supply Paper (WSP) 1216: 1942, maximum discharge. WSP 1246: Drainage area. WDR MT-2013: Drainage area. Gage height and discharge data for the period January 28 to March 26, 2017 were removed on April 27, 2021, based upon reanalysis of data.

PERIOD OF RECORD - October 1940 to September 1998, August 2000 to current year (seasonal records only).
GAGE - Water-stage recorder and sharp-crested, contracted, rectangular weir. Elevation of gage is 5,630 ft, referenced to the North American Vertical Datum of 1988. Prior to June 3, 1982, nonrecording gage at same site and elevation. Prior to Nov. 27, 1973, gage at same site and elevation 0.20 ft higher. U.S. Geological Survey data collection platform with satellite telemetry at station.
04-01-2020 to 10-31-2020 (seasonal record): records are good.
03-28-2019 to 10-31-2019 (seasonal record): records are good.
03-27-2018 to 12-11-2018 (seasonal record): records are good.
03-27-2017 to 10-31-2017 (seasonal record): records are good. 
03-29-2016 to 10-31-2016 (seasonal record): records are good. 
03-01-2015 to 11-02-2015 (seasonal record): records are good. 
04-01-2014 to 10-31-2014 (seasonal record): records are good.  

Flow regulated by Georgetown Lake (station number 12325000). Flow may be augmented by interbasin 
diversion from Silver Lake to Georgetown Lake or reduced by pumping from Georgetown Lake to Silver