USGS Water-Year Summary 2025
435300103265001 002S06E07CDD (NPS WELL 1)
Other aquifers
Precambrian Erathem
LOCATION - Lat 43°53'00.42", long 103°27'01.40" referenced to North American Datum of 1983, in SE 1/4 SW 1/4 sec.07, T.2 S., R.6 E., Pennington County, SD, Hydrologic Unit 10120109,
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 200 ft. Upper casing diameter 6 in; top of first opening undefined, bottom of last opening undefined.
DATUM - Land-surface datum is 4,855.09 ft above North American Vertical Datum of 1988. Measuring point: Unknown, 0 ft above land-surface datum, Jul. 1, 1967 to present; 3 chiseled marks on north side of top of steel casing marked with red paint, 0.9 ft above land-surface datum, Apr. 20, 2022 to present.