Custer County, South Dakota
Hydrologic Unit Code 10120109
Latitude 43°31'42", Longitude 103°32'08"
NAD27
Land-surface elevation 4,390 feet above NGVD29
Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.
Spring discharges from the Minnelusa Formation (Permian andPennsylvanian) (310MNLS) local aquifer.