USGS Water-Year Summary 2024
412522100121201 T17N R25W S21CDDD1 Arnold
High Plains aquifer
Quaternary System
LOCATION - Lat 41°25'22", long 100°12'12.17" referenced to North American Datum of 1983, in sec.21, T.17 N., R.25 W., Custer County, NE, Hydrologic Unit 10210004,
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 12 ft. Upper casing diameter 1.25 in; top of first opening 8.6 ft, bottom of last opening 11.6 ft.
DATUM - Land-surface datum is 2,694.31 ft above North American Vertical Datum of 1988. Measuring point: CHISELED NOTCH ON TOP OF STEEL WELL CASING, 2.32 ft above land-surface datum, Sep. 23, 2014 to Jun. 6, 2022; CHISELED NOTCH ON TOP OF STEEL WELL CASING, 2.42 ft above land-surface datum, Jun. 6, 2022 to present.
PERIOD OF RECORD - October 2014 to current year.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 1.17 feet above land surface datum, March 13, 2019 ; lowest, 3.78 feet below land surface datum, September 06, 2022.