2021 Map of Gannvalley SE

About this map

Jerauld County's agricultural landscape is defined by a rigorous Section Line road grid, a hallmark of the Public Land Survey System that shaped the South Dakota prairie. This topography is characterized by subtle elevation changes and numerous depressions that suggest a glaciated terrain, typical of the James River Highlands region. The township boundaries, including t107n r67w and t107n r66w, organize the territory into a rhythmic pattern of sectioned fields and pastures. Transportation follows this geometry exactly, with local routes like 225th St and 371st Ave providing access to isolated farmsteads. The drainage patterns and small basins scattered throughout the sections, particularly along 230th St, reveal the natural hydrology of the area before modern land management, offering a clear view of the rural spatial organization in the early twenty-first century.