USGS Water-Year Summary for Site 06331000

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

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

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USGS Water-Year Summary 2024

06331000 LITTLE MUDDY RIVER BELOW COW CREEK NEAR WILLISTON, ND

LOCATION - Lat 48°17'04", long 103°34'21" referenced to North American Datum of 1927, in sec.05, T.155 N., R.100 W., Williams County, ND, Hydrologic Unit 10110102, on left bank 37 ft downstream from centerline of highway, 1 mi downstream from Cow Creek, 4 mi upstream from Camp Creek, 10 mi northeast of Williston, and 13 mi upstream from mouth.

DRAINAGE AREA - 875 mi² of which 100 mi² probably is noncontributing.

SURFACE-WATER RECORDS

PERIOD OF RECORD - DAILY DISCHARGE--June 1954 to current year (seasonal records only 1984 to 2001).

PERIOD OF RECORD.--DAILY GAGE HEIGHT--February 2001 to current year.

GAGE -

Datum of the gage is 1,864.66 feet above North American Vertical Datum of 1988 (NAVD88) and 1,863.18 feet above National Geodetic Vertical Datum of 1929 (NGVD29).

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.--Some small diversions for irrigation. Some regulation by Lake Zahl, Fish and Wildlife Service reservoir, 22 mi upstream and by Blacktail Dam about 15 mi upstream.

EXTREMES FOR PERIOD OF RECORD - Maximum peak flow, 9,180 ft³/s, April 18, 1979, peak stage, 12.77 ft.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water year 1972 to current year.

PERIOD OF DAILY RECORD -
WATER TEMPERATURE: February 2015 to current year.

SPECIFIC CONDUCTANCE: February 2015 to current year.

REMARKS -

Water-quality monitor is located in a pool that is subject to temperature stratification. The monitor collects water temperature near the surface and is more representative of surrounding sites and the stream in general. Water temperature is not corrected to the cross section surveys. Specific conductance values can increase in a pool environment as water evaporates and salts concentrate.

Available periods of continuous water quality daily records are internally rated qualitatively as excellent, good, fair, or poor. For questions about periods of record and/or quality ratings, please send an email to gs-w-nd_nwisweb_data_inquiries@usgs.gov.

EXTREMES FOR PERIOD OF RECORD -
WATER TEMPERATURE: Maximum recorded, 29.2°C, July 29, 2016; minimum recorded, -0.3°C, several days in November 2015 and February 2016.

SPECIFIC CONDUCTANCE: Maximum recorded, 2,890 microsiemens, December 13, 2016; minimum recorded, 425 microsiemens, March 10, 2015.