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Water-Year Summary for Site 475224098443202
August 1951 to current year.
WELL CHARACTERISTICS.--Drilled observation well, depth 80 ft, cased with 67 ft of 6-in diameter steel pipe, slotted 57 to 67 ft below land-surface datum.
DATUM.--Altitude of land-surface datum is 1,480.77 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 1,479.6 ft above the National Geodetic Vertical Datum of 1929.
MEASURING POINT.--Top of casing 0.50 ft above land-surface datum.
EXTREMES FOR WATER YEAR 2014.--Highest water level, 11.62 ft below land-surface datum, July 30; lowest water level, 13.27 ft below land-surface datum, March 11.
EXTREMES FOR WATER YEAR 2015.--Highest water level, 11.82 ft below land-surface datum, October 1; lowest water level, 13.15 ft below land-surface datum, May 8.
EXTREMES FOR WATER YEAR 2016.--Highest water level, 12.52 ft below land-surface datum, October 11; lowest water level, 13.39 ft below land-surface datum, March 19.