1970 Map of Lake Parmley

About this map

Lake Parmley dominates the landscape of north-central South Dakota in this 1970s record, serving as a focal point for the Mina Recreation Area along the border of Edmunds and Brown Counties. The water system is defined by the winding course of Snake Creek, which feeds into the lake from the north. The map documents a significant moment in the region's transportation history, showing the Chicago Milwaukee St Paul and Pacific rail line under construction as it cuts across the townships of Cortlandt and Mercier. In the southern portion of the sheet, an Old Railroad Grade in the Highland and Richland areas reveals the shifting infrastructure of the prairie. This transition between established and emerging rail corridors illustrates the evolving agricultural economy of the era.