2012 Map of Trail City SW

About this map

The Moreau River meanders across this Dewey County landscape, carving a complex path through the South Dakota plains before reaching the eastern waters of Lake Oahe. This 2012 survey illustrates a sparsely populated region where the geography is defined by an intricate network of drainage systems, including Blue Beaver Cr and Johnson Cr which flow from the south, and Handboy Cr and Marshall Cr to the north. A single primary artery, Whitehorse Rd, provides the main terrestrial connection through the central portion of the quadrangle. The map reveals the relationship between the natural watercourses and the reservoir, showing how smaller tributaries like Veo Cr and Jolley Cr feed into the broader river valley, a terrain primarily utilized for open-range ranching and tribal lands.