Pennington County, South Dakota
Hydrologic Unit Code 10120110
Latitude 43°56'30", Longitude 103°46'07"
NAD27
Land-surface elevation 6,850 feet above NGVD29
Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.
Spring discharges from the Deadwood Formation (Outcrop) (371DDWD) local aquifer.