Pennington County, South Dakota
Hydrologic Unit Code 10120110
Latitude 44°06'50", Longitude 103°57'01"
NAD27
Land-surface elevation 6,790 feet above NGVD29
Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.
Spring discharges from the Pahasapa Limestone (337PHSP) local aquifer.