2021 Map of Moreau SE

About this map

Lake Oahe dominates the central landscape of this South Dakota quadrangle, where the impounded waters of the Missouri River create a complex shoreline of inlets and peninsulas. The terrain is defined by the sharp transition from the submerged river valley to the high prairie breaks, with several seasonal watercourses such as Three Legs Cr in the north and Fielder Cr in the south cutting through the rugged topography. Located along the boundary between Dewey and Walworth counties, the area is primarily undeveloped, reflecting a sparsely populated landscape characterized by massive water management infrastructure and open range. The map illustrates the contemporary shoreline and the intricate drainage patterns that feed into the reservoir system, essential for understanding the modern geography of the Missouri River basin.