2021 Map of Twin Lakes

About this map

Twin Lakes and Grass Lake dominate the central landscape of this South Dakota prairie region, where the borders of Sanborn, Jerauld, and Aurora counties meet. The 2021 topography reveals a drainage pattern defined by the meandering Dry Run, which cuts across the northern and eastern sections of the quadrangle. This area is characterized by a precise grid of rural section-line roads, including Co Rd 7 and Co Rd 80, which facilitate movement across the agricultural interior. The map illustrates the contemporary configuration of these prairie wetlands and seasonal watercourses, reflecting the persistent land-use patterns of the Great Plains. While settlements are absent from this immediate area, the network of numbered routes like 394th Ave and 237th St provides a detailed framework for understanding the spatial organization of these rural townships.