Pennington County, South Dakota
Hydrologic Unit Code 10120110
Latitude 43°56'53", Longitude 103°50'28"
NAD27
Land-surface elevation 6,350 feet above NGVD29
Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.
Spring discharges from the Pahasapa Limestone (337PHSP) local aquifer.