Loading map...

1968 Map of Moreau NW

Name: 1968 Topographic Map of Moreau NW
Creator: U.S. Geological Survey
Published: 1970
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1970

About this map

The Standing Rock Indian Reservation Boundary and Cheyenne River Indian Reservation Boundary meet in this 1968 landscape, following the county line between Corson and Dewey counties. The rising waters of Lake Oahe dominate the northern and southern edges of the map, illustrating the profound transformation of the Missouri River and Moreau River valleys following the construction of the Oahe Dam.

This topographical study captures a transitional riverine environment characterized by the prominent Ridgeland and numerous drainage systems like Thompson Creek, Timber Creek, and Chicken Creek. These watercourses carve through the high ground, while the dashed blue patterns indicate areas subject to controlled inundation. The map provides an essential record of the shoreline and elevation changes that redefined this part of South Dakota during the mid-20th century water management projects.