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Water-Year Summary for Site 472412098261201
December 1970 to June 2021.
WELL CHARACTERISTICS.--Drilled observation well, depth 166 ft., cased with 102 ft. of 6-in diameter plastic pipe, No. 30 slot screen set 102 to 107 ft. below land-surface datum.
DATUM.--Altitude of land-surface datum is 1,469.87 ft above North American Vertical Datum of 1988 (surveyed by ND State Water Commission, accuracy 0.1 feet). Prior to October 1, 2017, land-surface datum was published as 1,468.9 ft above the National Geodetic Vertical Datum of 1929.
MEASURING POINT.--Top of casing 3.47 ft. above land-surface datum since January 14, 2012. Prior to January 14, 2012, measuring point was the top of the well casing 1.60 ft. above land-surface datum.
EXTREMES FOR WATER YEAR 2014.--Maximum elevation, 0.56 ft below land-surface datum, August 24; lowest water level, 2.26 ft below land-surface datum, April 21, 22.
EXTREMES FOR WATER YEAR 2015.--Maximum elevation, 0.58 ft below land-surface datum, August 23; lowest water level, 2.46 ft below land-surface datum, May 4.
EXTREMES FOR WATER YEAR 2016.--Maximum elevation, -0.13 ft below land-surface datum, September 24, 25; lowest water level, 1.52 ft below land-surface datum, April 4.
EXTREMES FOR WATER YEAR 2017.--Maximum elevation, -0.10 ft below land-surface datum, October 1; lowest water level, 1.78 ft below land-surface datum, July 6.