2017 Map of Twin Lakes

About this map

The shallow waters of Twin Lakes and Grass Lake dominate the landscape at the intersection of Jerauld, Sanborn, and Aurora counties. This prairie terrain is defined by its precise section-line road network, where routes like 394th Ave and 238th St trace the underlying township grid. Intermittent drainage features such as Dry Run snake through the open fields, illustrating the hydrology of this eastern South Dakota agricultural region. The map preserves the exact alignment of county roads including Co Rd 7 and Co Rd 80, which provided the primary connectivity for farming families across Blaine Township in the early twenty-first century.