USGS Water-Year Summary for Site 06349000

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	Available Parameters
	00010 Temperature, water(Min.,Max.,Mean)
	00060 Discharge(Mean)
	00065 Gage height(Mean)
	00095 Specific cond at 25C(Min.,Max.,Mean)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

06349000 HEART RIVER NEAR MANDAN, ND

LOCATION - Lat 46°50'02", long 100°58'27" referenced to North American Datum of 1927, in NW 1/4 NE 1/4 sec.25, T.139 N., R.82 W., Morton County, ND, Hydrologic Unit 10130203, on left bank near downstream wingwall of bridge on county highway, 3 mi west of Mandan, and 4 mi downstream from Sweetbriar Creek.

DRAINAGE AREA - 3,310 mi². approximately.

REVISIONS HISTORY - WSP 926: 1938. WSP 1209: Drainage area. WSP 1239: 1924, 1928-29, 1948.

SURFACE-WATER RECORDS

PERIOD OF RECORD - DAILY DISCHARGE--April to September 1924, April 1928 to June 1933, August 1937 to current year. Published as "at Sunny" 1924, 1928-33.

PERIOD OF RECORD.--DAILY GAGE HEIGHT--October 2000 to current year.

GAGE -

Datum of gage is 1639.47 feet above North American Vertical Datum of 1988 (NAVD88) and 1,638.70 feet above the National Geodetic Vertical Datum of 1929 (NGVD29).

Previous locations and datums are located in WSP 1729 or 1917 for history of changes prior to June 30, 1958.

April 6 to September 30, 1924; Staff gage on old highway bridge, close to current site. Datum was 1,637.2 feet above NAVD88.

March 26, 1928 to March 27, 1943; Chain or wire-weight gages on old highway bridge at 10 ft above current datum.

April 9, 1943 to March 16, 1948; Wire weight gage on Northern Pacific Railway bridge 300 feet upstream at 10 ft above current datum.

March 17 to September 12, 1948; Wire-weight gage on highway bridge at current site and 10 ft above current datum.

September 13, 1948 to June 30, 1958; Water-stage recorder on right bank opposite of current site at 10 ft above current datum.

July 1, 1958 to September 30, 2022; Water-stage recorder at current location at 10 ft above current datum.

October 1, 2022 to current; Water-stage recorder at current location at current datum.

For a detailed gage datum history, please use the blue ‘questions or comments’ tab on the bottom of the site’s monitoring location page.

REMARKS - Accuracy of records for water years prior to 2014 are noted in the individual Annual Data Reports for those water years. For water years 2014 onward, records good except for estimated discharges, which are poor, unless otherwise noted
REGULATION.--Flow regulated by Lake Tschida, 105 mi upstream, since 1949. Some diversions above station.

EXTREMES FOR PERIOD OF RECORD - Maximum peak flow, about 30,500 ft³/s, April 19, 1950, peak stage, 23.64 ft.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1946-50, 1971-76, 1978 to 2012.

PERIOD OF DAILY RECORD -

WATER TEMPERATURE--July 1972 to October 1981 and May 2018 to October 2019.

SPECIFIC CONDUCTANCE--July 1972 to October 1981 and May 2018 to October 2019.

SUSPENDED-SEDIMENT CONCENTRATION--October 1971 to September 1976.

SUSPENDED-SEDIMENT DISCHARGE--May 1948 to September 1971 (furnished by the U.S. Army Corps of Engineers).

EXTREMES FOR PERIOD OF DAILY RECORD -

WATER TEMPERATURE:Maximum recorded, 33.0°C, July 22, 1979; minimum recorded, 0.0

SPECIFIC CONDUCTANCE: Maximum recorded, 2,300 microsiemens, February 3, 1980; minimum recorded, 390 microsiemens, March 28, 1978.

SUSPENDED-SEDIMENT CONCENTRATION: Maximum daily mean, 3,460 mg/L, April 30, 1975; minimum daily mean, 1 mg/L, February 6 to March 10, 1971.

SUSPENDED-SEDIMENT DISCHARGE: Maximum daily, 303,000 tons/day, April 8, 1952; minimum daily, 0.0 tons/day, many days in some years.