1956 Map of Rousseau Creek SW

About this map

The Cheyenne River Indian Reservation Boundary marks a significant division in this mid-century landscape along the Cheyenne River. At the time of this 1956 field check, the region was characterized by isolated homesteads like Holloway Ranch and Chisholm Ranch, situated near the confluence of Minneconjou Creek and the main river valley. This survey was conducted as part of the Missouri River Basin development program, specifically noting areas intended for submergence by the planned Lake Oahe at an elevation of 1620 feet. This detail provides an essential record of the original riverbanks and creek beds, such as Fishgut Creek and Sage Creek, before the landscape was altered by massive flood control projects. The topography transitions from named plains like Rich Flats and Little Flats to the dissected drainage networks that feed into the Cheyenne from both Dewey and Stanley Counties.