USGS Water-Year Summary for Site 05056678

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00065 Gage height(Mean) [Bubbler]
	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

05056678 TOLNA COULEE NEAR TOLNA, ND

LOCATION - Lat 47°51'39", long 98°29'40" referenced to North American Datum of 1983, in SE 1/4 SW 1/4 sec.29, T.151 N., R.61 W., Nelson County, ND, Hydrologic Unit 09020203, at downstream side of bridge on county road, about 3.2 mi northwest of Tolna.

DRAINAGE AREA - Not determined.

SURFACE-WATER RECORDS

PERIOD OF RECORD - June 2012 to current year (seasonal records only).

GAGE - Acoustic doppler velocity meter and water stage recorder. Datum of gage is 1,424.15 ft above North American Vertical Datum 1988 (NAVD88, survey done by USGS) and 1,422.97 ft above National Geodetic Vertical Datum (NGVD29).

REMARKS -

Flow regulated by East End Devils Lake Outlet structure operated by the North Dakota State Water Commission since June 2012.

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 fair except for the 2020 and the 2022 water years, when record was rated good. Discharges below 10 cfs and estimated discharges are poor, unless otherwise noted.

EXTREMES FOR PERIOD OF RECORD - Maximum daily peak flow, 394 ft³/s, August 31, 2014; peak stage, 17.14 ft; maximum peak stage recorded, 18.62 ft, July 6, 2012.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD - WATER TEMPERATURE: June 2012 to current year (seasonal records only).

SPECIFIC CONDUCTANCE: June 2012 to current year (seasonal records only).

REMARKS -

Water quality monitor removed for winter months;
Water Year 2014 - November 11 to May 14.
Water Year 2015 - November 11 to April 28.
Water Year 2016 - November 8 to March 27.
Water Year 2017 - November 18 to April 11.

Water Year 2018 - October 31 to May 8th.

RECORD RATED - WATER TEMPERATURE:

Water Year 2014: Rated excellent: October 1-November 10, May 15-September 30.
Water Year 2015: Rated excellent: October 1-November 10, April 29-September 30.
Water Year 2016: Rated excellent: October 1-November 7, March 28-September 30.

RECORD RATED - SPECIFIC CONDUCTANCE:
Water Year 2014: Rated excellent: October 1-November 10, May 15-September 1, September 4-30. Rated good: September 2-3.
Water Year 2015: Rated excellent: October 1-November 10, April 29-May 16, May 29-July 4, July 10-September 30. Rated good: July 5-9. Rated poor: May 17-May 28
Water Year 2016: Rated excellent: October 1-November 7, March 28-April 20, April 27-May 1, May 5-June 20, June 29-July 13, August 19-September 8, September 27-30. Rated good: April 21-26, May 2-4, June 21-28, July 18-August 18, September 9-26.

EXTREMES FOR WATER YEAR 2014:
WATER TEMPERATURE: Maximum recorded, 25.7°C, August 1; minimum recorded, 1.1°C, November 10.
SPECIFIC CONDUCTANCE: Maximum recorded, 2,890 microsiemens, October 23; minimum recorded, 1,540 microsiemens, June 17.

EXTREMES FOR WATER YEAR 2015:
WATER TEMPERATURE: Maximum recorded, 27.4°C, June 7; minimum recorded, -0.2°C, November 10.
SPECIFIC CONDUCTANCE: Maximum recorded, 2,910 microsiemens, August 14; minimum recorded, 898 microsiemens, May 19.

EXTREMES FOR WATER YEAR 2016:
WATER TEMPERATURE: Maximum recorded, 30.2°C, August 11; minimum recorded, 0.2°C, April 8.
SPECIFIC CONDUCTANCE: Maximum recorded, 3,110 microsiemens, September 23, 26; minimum recorded, 702 microsiemens, April 4.

EXTREMES FOR WATER YEAR 2017:
WATER TEMPERATURE: Maximum recorded, 27.1°C, July 30; minimum recorded, 0.1°C, April 25.
SPECIFIC CONDUCTANCE: Maximum recorded, 3,040 microsiemens, October 3; minimum recorded, 763 microsiemens, April 18.

EXTREMES FOR WATER YEAR 2018:
WATER TEMPERATURE: Maximum recorded, 29.7°C, August 9; minimum recorded, -0.1°C, October 27.
SPECIFIC CONDUCTANCE: Maximum recorded, 2,980 microsiemens, August 26; minimum recorded, 830 microsiemens, May 13.

EXTREMES FOR PERIOD OF RECORD -
WATER TEMPERATURE: Maximum recorded, 30.2°C, August 11, 2016; minimum recorded, -0.2°C, November 10, 2015.

SPECIFIC CONDUCTANCE: Maximum recorded, 3,110 microsiemens, September 23, 26, 2016; minimum recorded, 702 microsiemens, April 4, 2016.