Pennington County, South Dakota
Hydrologic Unit Code 10120110
Latitude 43°57'02", Longitude 103°50'12"
NAD27
Land-surface elevation 6,380 feet above NGVD29
Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.
Spring discharges from the Deadwood Formation (Outcrop) (371DDWD) local aquifer.