USGS Water-Year Summary 2024
405855100073901 12N 25W25CBBB1-Site6-75
High Plains aquifer
Quaternary System
LOCATION - Lat 40°58'54.67", long 100°07'38.6" referenced to North American Datum of 1983, in NW 1/4 NW 1/4 SW 1/4 sec.25, T.12 N., R.25 W., Dawson County, NE, Hydrologic Unit 10200101,
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 75 ft. Upper casing diameter 2 in; top of first opening 70 ft, bottom of last opening 75 ft.
DATUM - Land-surface datum is 2,636.11 ft above North American Vertical Datum of 1988. Measuring point: Top of casing, 3.0 ft above land-surface datum, Apr. 27, 2010 to Apr. 28, 2010; Undefined, 2.85 ft above land-surface datum, Aug. 27, 2010 to present.
PERIOD OF RECORD - July 10, 2014 to present.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 51.41 feet below land surface datum, May 22, 2012; lowest, 69.29 feet below land surface datum, September 8, 2023.