Custer County, South Dakota
Hydrologic Unit Code 10120109
Latitude 43°34'46", Longitude 103°39'32"
NAD27
Land-surface elevation 4,820 feet above NGVD29
Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.
Spring discharges from the Minnelusa Formation (Permian andPennsylvanian) (310MNLS) local aquifer.