2021 Map of Forbes SW

About this map

Willow Cr meanders across this rural section of McPherson County, defining the drainage patterns of a landscape marked by a disciplined grid of section lines and range boundaries. The terrain is organized by established thoroughfares such as Co Hwy 19 and Cty Hwy 21, which facilitate travel through the agricultural townships of t127n r68w and t128n r67w. The network of gravel and local roads, including 364th Ave and 109th St, reflects a late-twentieth-century development of the Great Plains interior, where small-scale drainage features and intermittent streams dictate the placement of crossings. This 2021 document by the U.S. Geological Survey provides a precise view of modern land division and water resources in this sparsely populated region of South Dakota.