Pennington County, South Dakota
Hydrologic Unit Code 10120109
Latitude 43°57'52", Longitude 103°27'34"
NAD27
Land-surface elevation 4,636 feet above NGVD29
Spring discharges from the Other aquifers (N9999OTHER) national aquifer.
Spring discharges from the Precambrian Erathem (400PCMB) local aquifer.