2017 Map of Rousseau Creek

About this map

Lake Oahe dominates the southern and eastern landscape of this Dewey County region, where the Missouri River's dammed waters back into complex, finger-like inlets. The hydrology is defined by northern drainage systems like Rousseau Cr, including its west and east branches, and Joes Cr, which carve through the high prairie before meeting the reservoir. This modern survey illustrates how the inundation of the valley floor transformed the local geography, creating deep draws such as Fine Weather Draw and Whiteman Draw that now terminate at the water's edge. Access to these remote shorelines is maintained by a sparse network of roads, notably Bia Rd 803, which reflects the ongoing importance of Bureau of Indian Affairs infrastructure in managing the land near the Dewey and Stanley County line.