Pennington County, South Dakota
Hydrologic Unit Code 10120109
Latitude 43°53'47", Longitude 103°47'07"
NAD27
Land-surface elevation 6,610 feet above NGVD29
Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.
Spring discharges from the Pahasapa Limestone (337PHSP) local aquifer.