Custer County, South Dakota
Hydrologic Unit Code 10120107
Latitude 43°48'27", Longitude 103°52'50"
NAD27
Land-surface elevation 6,040 feet above NGVD29
Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.
Spring discharges from the Minnelusa Formation (Permian andPennsylvanian) (310MNLS) local aquifer.