Custer County, South Dakota
Hydrologic Unit Code 10120107
Latitude 43°49'37", Longitude 103°59'12"
NAD27
Land-surface elevation 5,320 feet above NGVD29
Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.
Spring discharges from the Minnelusa Formation (Permian andPennsylvanian) (310MNLS) local aquifer.