Custer County, South Dakota
Hydrologic Unit Code 10120109
Latitude 43°33'53", Longitude 103°36'47"
NAD27
Land-surface elevation 4,620 feet above NGVD29
Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.
Spring discharges from the Minnelusa Formation (Permian andPennsylvanian) (310MNLS) local aquifer.