USGS Water-Year Summary for Site 12324200

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	Available Parameters
	00010 Temperature, water(Mean,Max.,Min.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	63680 Turbidity, Form Neph(Max.,Min.,Mean)
	80154 Suspnd sedmnt conc(Mean)
	80155 Suspnd sedmnt disch(Mean)
	80299 Suspnd sedmnt conc, sensor(Mean,Min.,Max.)

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

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USGS Water-Year Summary 2023

12324200 CLARK FORK AT DEER LODGE, MT

LOCATION - Lat 46°23'51.54", long 112°44'33.14" referenced to North American Datum of 1983, in SW 1/4 SW 1/4 SW 1/4 sec.33, T.8 N., R.9 W., Powell County, MT, Hydrologic Unit 17010201, on left bank 35 ft upstream from Milwaukee Avenue Bridge in Deer Lodge, 0.05 mi upstream from Taylor Creek, 0.24 mi downstream from Tin Cup Joe Creek, and at river mile 461.2.

DRAINAGE AREA - 1,001 mi². Area at site used prior to Oct. 1, 1994, 1,005 mi². Area used October 1994 to September 2000, 916 mi².

REVISIONS HISTORY - Daily water temperature data statistics (maximum, minimum, and mean) for the period of Oct. 1, 2002 to Sept. 30, 2004 were removed on March 17, 2022 after a review of the record determined the data were not quality assured.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1978 to current year.

GAGE - Water-stage recorder. Elevation of gage is 4,502.24 ft, referenced to the National Geodetic Vertical Datum of 1929. U.S. Geological Survey satellite telemeter is located at the station.

REMARKS - Numerous diversions for irrigation occur upstream from station. Some regulation is imposed by settling ponds on Silver Bow Creek near Warm Springs.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1963, 1969-71, 1979-83, 1985 to current year.

PERIOD OF DAILY RECORD -

WATER TEMPERATURE: October 1978 to September 1983, October 1991 to September 1998, seasonal records 
for May 2001 to September 2002.
SUSPENDED-SEDIMENT DISCHARGE: March 1985 to August 1986, April 1987 to March 2003, August 2003 to 
October 2020.
TURBIDITY: Seasonal record for March to September 2016. Seasonal record for November 2018 to October 2020.

REMARKS -

EXTREMES FOR PERIOD OF DAILY RECORD -

WATER TEMPERATURE : Maximum, 24.5°C, July 26, 1998, July 11-14, 2002; minimum, 0.0°C on many days 
during winter periods.
SEDIMENT CONCENTRATION: Maximum daily mean, 835 mg/L, Feb. 8, 1996; minimum daily mean, 1 mg/L, on 
several days.
SEDIMENT LOAD: Maximum daily, 2,840 tons, Feb. 24, 1986; minimum daily, 0.16 ton, July 24, 2007.
TURBIDITY: Maximum, 250 formazin nephelometric units (FNU) on March 25, 2019; minimum, < 1.0 FNU many days July to September 2019 and September 2020.

EXTREMES FOR CURRENT YEAR - TURBIDITY: Maximum, 154 formazin nephelometric units (FNU) on May 20, 2020; minimum, < 1.0 FNU many days in September.