Water supply at Painted Canyon Overlook, Theodore Roosevelt National Memorial Park (South Unit), southwestern North Dakota

A 1,930-foot (588-metre) water-supply well was constructed at the Painted Canyon Overlook, Theodore Roosevelt National Memorial Park (South Unit), southwestern North Dakota. Aquifers underlying the site are in rocks of Late Cretaceous and Tertiary age. These rocks have an aggreqate thickness of about 2,000 feet (610 metres). The well screen is set in the Fox Hills Sandstone of Late Cretaceous age. The formation consists of about 200 feet (61 metres) of interbedded marine sandstone, siltstone, and claystone. The sandstone is very fine to fine grained.

The well was pumped for 24 hours w·ith a submersible pump at rates from 72 to 77 gallons per minu t e (4.5 to 4.9 litres per second) and had a specific capacity of about 0.4 gallon per minute per foot (0.08 litre per second per metre). The water was a sodium bicarbonate type and contained 1,050 milligrams per litre dissolved solids.