Custer County, South Dakota
Hydrologic Unit Code 10120109
Latitude 43°31'28", Longitude 103°22'34"
NAD27
Land-surface elevation 3,470 feet above NGVD29
Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.
Spring discharges from the Minnekahta Limestone (310MNKT) local aquifer.