Custer County, South Dakota
Hydrologic Unit Code 10120107
Latitude 43°45'46", Longitude 103°58'53"
NAD27
Land-surface elevation 4,990 feet above NGVD29
Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.
Spring discharges from the Minnelusa Formation (Permian andPennsylvanian) (310MNLS) local aquifer.