1969 Map of No Heart Creek SE

About this map

Lake Oahe dominates this landscape along the border of Dewey and Sully counties, representing a period of significant hydrological change in South Dakota. Published in the early 1970s, the map documents the area during the development of the Missouri River Basin, where the rising waters of the reservoir reshaped the valley. The Cheyenne River Indian Reservation Boundary is marked along the Missouri River channel, tracing the historic limits of tribal lands as they met the water's edge. The terrain is defined by several prominent inlets, including Willow Creek Bay, Fairbanks Creek, and Splits Creek, which carve into the surrounding uplands. At an Elevation 1608, the map highlights the vast areas subject to controlled inundation, providing a clear record of the shoreline and land use patterns before the full impact of the basin's water management projects was realized.