Pennington County, South Dakota
Hydrologic Unit Code 10120110
Latitude 44°03'18", Longitude 103°23'39"
NAD83
Land-surface elevation 4,150 feet above NGVD29
Spring discharges from the Other aquifers (N9999OTHER) national aquifer.
Spring discharges from the Precambrian Erathem (400PCMB) local aquifer.