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1971 Map of Big Flat West

Name: 1971 Topographic Map of Big Flat West
Creator: U.S. Geological Survey
Published: 1975
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1975

About this map

Big Flat dominates this 1970s landscape along the border of Blaine and Phillips Counties. The terrain is defined by a series of deep drainage channels known as coulees that carve through the plateau. In the northeast, the Weigand Reservoir provides a significant water source, while the surrounding land is marked by the winding paths of Lone Tree Coulee, Chicken Coulee, and Rocky Coulee.

Mapped within the Fort Belknap Indian Reservation, the area shows a distinct lack of concentrated settlements, emphasizing a rural and topographic character focused on the natural water drainage patterns of the high plains. The intricate contour lines illustrate the sharp descent from the flatlands into features like Wolf Coulee and Corral Coulee, offering a detailed look at the local geography before modern agricultural or infrastructure changes altered the drainage basin.