2012 Map of Twin Lakes

About this map

Twin Lakes and Grass Lake form the central hydrological focus of this rural landscape in Jerauld County. The area is defined by a rigorous section-line road grid, including 394th Ave and 237th St, which speaks to the enduring influence of the Public Land Survey System on South Dakota's agricultural layout. Seasonal drainage patterns are visible through the intermittent course of Dry Run, which meanders across the northern and eastern portions of the quadrangle. This 2012 survey by the U.S. Geological Survey captures the sparse settlement pattern of the region, where isolated farmsteads are connected by a network of local roads ranging from 392nd Ave to 398th Ave. The terrain is characterized by subtle elevation changes and the presence of small, scattered depressions typical of the prairie pothole region.