2015 Map of Gannvalley SE

About this map

Glacial depressions and undulating prairie define the landscape of south-central South Dakota, shown here in the mid-2010s. The land is strictly organized by the Public Land Survey System, with township boundaries such as t107n r67w and t108n r66w guiding the layout of the region. A precise grid of section-line roads provides the only infrastructure across these agricultural acres, primarily composed of east-west thoroughfares like 225th St and 233rd St, and north-south corridors including 366th Ave and 371st Ave. This drainage pattern, characteristic of the Missouri Coteau, features numerous small basins and prairie potholes that dictate the winding paths of local farm tracks. The map serves as a clear record of the intersection between Jerauld County's natural topography and the rigid human-imposed geometry of the rural road network.