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Water-Year Summary for Site 462400097552502
April 1968 to current year.
WELL CHARACTERISTICS.--Drilled observation well, depth 60 ft, cased with 54 ft of 4-in diameter plastic pipe, No. 20 slot screen set 54 to 59 ft below land-surface datum.
INSTRUMENTATION.--Measured using a chalked steel tape or a graduated electric tape.
DATUM.--Altitude of land-surface datum is 1,344.29 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 1,343.2 ft above National Geodetic Vertical Datum of 1929.
MEASURING POINT.--Top of casing 1.10 ft above land-surface datum.
EXTREMES FOR WATER YEAR 2014.--Highest water level, 18.64 ft below land-surface datum, July 7, 8; lowest water level, 20.95 ft below land-surface datum, October 1.
EXTREMES FOR WATER YEAR 2015.--Highest water level, 18.60 ft below land-surface datum, June 22; lowest water level, 20.90 ft below land-surface datum, August 17, 18.
EXTREMES FOR WATER YEAR 2016.--Highest water level, 19.59 ft below land-surface datum, May 3, 9; lowest water level, 21.46 ft below land-surface datum, August 10.
EXTREMES FOR WATER YEAR 2017.--Highest water level, 18.90 ft below land-surface datum, May 25; lowest water level, 21.6 ft below land-surface datum, August 9.