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Water-Year Summary for Site 06308500

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

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

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USGS Water-Year Summary 2021
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 -
10-01-2019 to 09-30-2020: records are fair, except estimated records are poor.
10-01-2018 to 09-30-2019: records are fair, except estimated records are poor.
10-01-2017 to 09-30-2018: records are fair, except estimated records are poor.
10-01-2016 to 09-30-2017: records are good, except estimated records are poor.
10-01-2015 to 09-30-2016: records are fair, except estimated records are poor.
10-01-2014 to 09-30-2015: records are fair, except estimated records are poor. 
10-01-2013 to 09-30-2014: records are good, except estimated records are poor. 

Flow is regulated by Tongue River Reservoir (station 0630700) with capacity of 79,100 acre-feet, 
and many small reservoirs in Wyoming with combined capacity about 15,000 acre-ft. Diversions for 
irrigation include about 100,800 acres upstream from 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 -

SPECIFIC CONDUCTANCE

Record no longer rated.

03-03-2016 to 10-31-2016 (seasonal record): records are good to excellent (corrections <10%), except 
for June 13-June 20, which is rated fair (corrections >10 to 15%); and June 21, which was rated poor 
(corrections >15%).
03-26-2015 to 10-31-2015 (seasonal record): records are good to excellent (corrections <10%), except 
records from June 7-20 are fair (corrections >10 to 15%); and records from June 21-24 are poor 
(corrections >15%).  
03-29-2014 to 10-31-2014 (seasonal record): records are good to excellent (corrections <10%), except 
records from Apr. 3-4, May 6 to 17, June 1, and June 30 to July 10 are fair (corrections >10 to 15%); 
and records from Apr. 5-10, May 18-28, and June 2-29 are poor (corrections >15%).
 

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.