USGS Water-Year Summary for Site 06185500

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	00060 Discharge(Mean)

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

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USGS Water-Year Summary 2023

06185500 MISSOURI RIVER NEAR CULBERTSON, MT

LOCATION - Lat 48°07'24.60", long 104°28'23.88" referenced to North American Datum of 1983, in SE 1/4 NW 1/4 sec.3, T.27 N., R.56 E., Richland County, MT, Hydrologic Unit 10060005, On right bank at upstream side of bridge on State Highway 16, 2.5 mi southeast of Culbertson, 10 mi downstream from Big Muddy Creek, and at river mile 1,620.76.

DRAINAGE AREA - 89,858 mi².

REVISIONS HISTORY - Water Supply Paper 1729: Drainage area. WDR MT-2013: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - July 1941 to December 1951, April 1958 to current year.

GAGE - Water-stage recorder. Elevation of gage is 1,883.4 ft, referenced to the National Geodetic Vertical Datum of 1929 (U.S. Army Corps of Engineers bench mark). July 1 to Nov. 6, 1941, water-stage recorder at site 400 ft. upstream at elevation 0.11 ft. higher. Nov. 7, 1941, to Aug. 17, 1950, water-stage recorder at site 580 ft. downstream at present elevation. Aug. 18, 1950, to Dec. 31, 1951, nonrecording gage on bridge at present elevation. Apr. 1, 1958, to Nov. 1, 1967, water-stage recorder at site 580 ft. downstream at present elevation.

REMARKS - Flow is partly regulated by Fort Peck Lake (station number 06131500) and many other reservoirs upstream from station. Numerous diversions for irrigation occur upstream from station.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1946, 1965 to 1986, 1991 to 1994, October 1996 to July 2013.

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: July 1965 to September 1981. WATER TEMPERATURE: July 1965 to September 1979, seasonal records starting July 18, 2002 to September 2004. SUSPENDED-SEDIMENT DISCHARGE: October 1971 to September 1976.

REMARKS -

EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum daily, 941 microsiemens per centimeter (uS/cm) at 25°C, Jan. 19, 1980; minimum daily, 338 uS/cm at 25°C, Mar. 30, 1967. WATER TEMPERATURE: Maximum, 26.0°C, Aug. 14, 2003; minimum, 0.0°C, on many days during winter period. SEDIMENT CONCENTRATION: Maximum daily mean, 2,940 mg/L, Aug. 15, 1974; minimum daily mean, 30 mg/L, Jan. 13, 1975. SEDIMENT LOAD: Maximum daily, 147,000 tons, June 5, 1975; minimum daily, 421 tons, Jan. 13, 1975.