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Water-Year Summary for Site 05051522
DAILY DISCHARGE--October 1975 to current year.
PERIOD OF RECORD.--DAILY GAGE HEIGHT--October 2000 to current year.
PERIOD OF RECORD.--CONTINUOUS WATER QUALITY--October 2019 to current year.
Previous locations and datums are as follows:
October 1975 to August 2007, recording gage at current location at datum 0.68 feet higher.
September 2007 to present, recording gage at current location and at current datum.
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.
Starting with the 2024 water year, record quality ratings are no longer included in the water-year summary for approved records. Record quality is still being rated internally. For questions about record quality ratings, please send an email to gs-w-nd_NWISWeb_Data_Inquiries@usgs.gov.
REGULATION--Flow regulated by: Orwell Reservoir, flood storage capacity, 13,300 acre-ft at elevation 1,070 ft above mean sea level, adjustment of 1912; Mud Lake, flood storage capacity, 78,600 acre-ft at elevation 981 ft above mean sea level, adjustment of 1912; Lake Traverse, flood storage capacity, 75,100 acre-ft at elevation 981 ft above mean sea level, adjustment of 1912; and numerous other controlled lakes, ponds and several powerplants.
WATER TEMPERATURE: Maximum recorded, 29.86°C, July 5th, 2021 minimum recorded, -0.11°C on many days during winter months.
SPECIFIC CONDUCTANCE: Maximum recorded, 2,770 microsiemens, November 2nd, 2021; minimum recorded, 410 microsiemens, August 16 th, 2020.
PH: Maximum recorded, 8.92 units, October 2021 & 2023; minimum recorded, 7.56 units, August 16th, 2020.
DISSOLVED OXYGEN: Maximum recorded, 17.78 milligrams per liter, Dec 23, 2023; minimum recorded, 0.74 milligrams per liter, May 24th, 2024.
TURBIDITY: Maximum operating range of sensor, 329 FNU, July 10th, 2020; minimum recorded, 2.0 FNU, many days December 2024.