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Water-Year Summary for Site 12323750

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

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USGS Water-Year Summary 2021
12323750 SILVER BOW CREEK AT WARM SPRINGS, MT
LOCATION - Lat 46°10'46.19", long 112°46'50.02" referenced to North American Datum of 1983, in SW 1/4 SE 1/4 SW 1/4 sec.18, T.5 N., R.9 W., Deer Lodge County, MT, Hydrologic Unit 17010201, on left bank 1.0 mi upstream from confluence with Warm Springs Creek, 1.1 mi upstream from county highway bridge, and 0.5 mi east of Warm Springs.
DRAINAGE AREA - 473 mi². Site used prior to May 24, 1994, had an area of 483 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - March 1972 to September 1979, April 1993 to current year.
GAGE - Water-stage recorder. Elevation of gage is 4,800.31 ft, referenced to the National Geodetic Vertical Datum of 1929. Prior to May 24, 1994, gage located at sites 0.8 mi downstream at different elevation.
REMARKS -
10-02-2019 to 11-30-2020: records are good, except estimated records are poor.
10-18-2018 to 10-01-2019: records are good.
10-25-2017 to 10-17-2018: records are good.
12-01-2016 to 10-24-2017: records are good.
10-07-2015 to 11-30-2016: records are good.
10-21-2014 to 10-06-2015: records are good, except records from Oct. 21 to Dec. 6, and May 31 to
Sept. 30, and estimated records are poor.
10-01-2013 to 10-20-2014: records are good, except estimated records are poor.
Flow is regulated by dam on tailing ponds about 0.2 mi upstream from gage. Diversions for irrigation
include about 4,650 acres upstream from station. 
WATER-QUALITY RECORDS
PERIOD OF RECORD - March 1993 to current year.
PERIOD OF DAILY RECORD - SUSPENDED-SEDIMENT DISCHARGE: April 1993 to September 1995.
REMARKS - Several unpublished observations of specific conductance and water temperature were made during the year.
EXTREMES FOR PERIOD OF DAILY RECORD - SEDIMENT CONCENTRATION: Maximum daily mean, 429 mg/L, Mar. 15, 1994; minimum daily mean, 1 mg/L, several days in October 1995. SEDIMENT LOAD: Maximum daily, 302 tons, June 6, 1995; minimum daily, 0.12 ton, several days in August 1995.