2017 Map of Oelrichs NE

About this map

Buffalo Gap National Grassland dominates this corner of Oglala Lakota County, where the plains are defined by an intricate network of seasonal drainage patterns. This 2017 survey reveals the hydrological structure of the high prairie, centered on the complex of Blacktail Creek and its various tributaries including the North Fork Blacktail Creek and South Branch Blacktail Creek. The map documents a sparsely settled landscape where local connectivity is maintained through routes like Black Tail Road and County Highway 1F. Geographic landmarks such as Middle Kneebone Draw and School Section Creek provide essential reference points for researchers studying land use and public grazing allotments. This detailed topographic study illustrates the transition from Fall River County into the national grassland, capturing the contemporary state of these expansive South Dakota rangelands.