USGS Water-Year Summary for Site 06308500

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)

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

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USGS Water-Year Summary 2023

06308500 TONGUE RIVER AT MILES CITY, MT

LOCATION - Lat 46°23'04.54", long 105°50'43.88" referenced to North American Datum of 1983, in SE 1/4 SE 1/4 SE 1/4 sec.04, T.7 N., R.47 E., Custer County, MT, Hydrologic Unit 10090102, on right bank 1.5 mi south of Miles City and at river mile 2.3.

DRAINAGE AREA - 5,404 mi². Area at site used prior to Oct. 4, 1995, 5,379 mi².

REVISIONS HISTORY - WSP 1729: Drainage area. 2011 (Extremes for Period of Daily Record--Specific Conductance: maximum daily value).

SURFACE-WATER RECORDS

PERIOD OF RECORD - April 1938 to April 1942, April 1946 to current year. Published as "near Miles City" April 1938 to April 1942. Not equivalent to records published as "near Miles City" May 1929 to October 1932. April 1946 to Oct. 4, 1995, at site 2.5 mi upstream from present site. Flows at present site are equivalent with flows at site operated from 1946. Monthly discharge only for some periods, published in Water Supply Paper (WSP) 1309.

GAGE - Water-stage recorder. Elevation of gage is 2,351.40 ft, referenced to the North American Vertical Datum of 1988. April 1938 to April 1942, nonrecording gage located at site 8 mi upstream from present site at different elevation. April 1946 to Sept. 30, 1963, located at elevation 1.00 ft higher than present site. Oct. 4, 1995, gage was moved 2.5 miles downstream.

REMARKS - Diversions for irrigation occur upstream from the station.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1946 to September 1994, October 1977 to December 1985, May 1999 to October 31, 2016, April 2019 to present.

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: October 1965 to September 1981 (observer), April 29, 2004 to October 31, 2016,
April 2019 to present (seasonal records, continuous monitor).

WATER TEMPERATURE: April 2000 to September 2003 (seasonal records). SUSPENDED-SEDIMENT DISCHARGE: October 1977 to December 1985.

INSTRUMENTATION - Specific conductance probe was installed April 28, 2004.

REMARKS -

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE (seasonal records): Maximum daily, 1,900 microsiemens per centimeter (uS/cm) 
at 25.0°C, Apr. 22, 2011; minimum daily, 215 uS/cm at 25.0°C, Feb. 16, 1971.
WATER TEMPERATURE (seasonal records): Maximum, 37.0°C, Aug. 22, 2001; minimum 0.0°C, Apr. 5, 2002.
SEDIMENT CONCENTRATION: Maximum daily mean, 14,200 mg/L, Aug. 3, 1985; minimum daily mean, 3 mg/L, 
Dec. 20, 1983.
SEDIMENT LOAD: Maximum daily, 84,400 tons May 18, 1978; minimum daily, 0.13 tons May 5, 1981.

EXTREMES FOR CURRENT YEAR - SPECIFIC CONDUCTANCE (seasonal records): Maximum recorded, 1,860 uS/cm at 25.0°C, May 22, 2013; minimum recorded, 552 uS/cm at 25.0°C, September 13, 2013.