2017 Map of Irwin

About this map

The Irwin settlement area sits along the border of Nebraska and South Dakota, characterized by a complex network of wetlands and seasonal water bodies. This 2017 survey details a landscape of prairie depressions and drainage engineering, most notably the Horseshoe Drainage Ditch which cuts across the central terrain. The map reveals the hydrologic character of the Sandhills region, where large named bodies like Alkali Lake, North Twin Lake, and South Twin Lake dominate the western sections. Smaller features like Log Cabin Lake and Carpenter Lake suggest the proximity of ranching and early habitation points. To the north and east, the elevation shifts toward grassy expanses such as Scott Meadow and Slim Meadow, while the isolated Irwin RD provides the primary transit artery through this sparsely populated borderland.