1973 Map of Iron Post Buttes SE

About this map

The Missouri River corridor dominates this landscape, having been transformed by the mid-century inundation that created Lake Oahe. This survey provides a rare look at the underwater topography of the riverbed, with contours derived from 1947 USCE maps before the reservoir was filled. The transition from the high, dry draws of Sully Creek and Plum Creek to the submerged river valley illustrates the massive scale of the Oahe Dam project. Along the eastern bluffs, the Old Military Reservation Boundary marks a historical line of land tenure, while contemporary land use is reflected in the Koenig State Public Shooting Area and the Okobojo Recreation Area. In the south, the broad Peoria Flats extend toward the river's edge, broken only by the occasional Gravel Pit and winding drainages like Red Woman Creek.