2015 Map of Moreau NW

About this map

The Missouri River and the northern reaches of Lake Oahe define the eastern and southern margins of this South Dakota landscape. This 2015 survey details a transition from the river valley to the upland plains, intersected by numerous seasonal drainages. Significant creek systems, including Chicken Cr and Deadman Cr, cut through the terrain, creating a complex series of draws and ridges. The boundary between Corson County and Dewey County bisects the area, following a straight latitudinal line across the dissected topography. Local travel is facilitated by a network of secondary routes like CR-14 and 280th Ave, which serve the rural sections of the Standing Rock and Cheyenne River reservation lands. The map illustrates how historical land divisions and the inundation of the Missouri River valley have shaped modern access and water management in this part of the Great Plains.