Pennington County, South Dakota
Hydrologic Unit Code 10120203
Latitude 44°08'20", Longitude 104°00'40"
NAD27
Land-surface elevation 6,480 feet above NGVD29
Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.
Spring discharges from the Madison Group (Upper and Lower Mississippian) (331MDSN) local aquifer.