1971 Map of Big Flat West

About this map

Big Flat dominates this high-plains landscape within the boundary of the Fort Belknap Indian Reservation, where the drainage patterns of North Central Montana are clearly defined. In the northern reaches, the Weigand Reservoir serves as a significant catchment point, while the rest of the terrain is deeply etched by a network of seasonal watercourses. The drainage system is characterized by the branching paths of Lone Tree Coulee, Corral Coulee, and Chicken Coulee, which illustrate the erosion patterns typical of this semi-arid region. Mapping conducted by the Geological Survey during the early 1970s reveals a sparse road network and the political division between Blaine Co and Phillips Co. The southern portion of the sheet is particularly intricate, showing the converging paths of Wolf, Allen, and Rocky Coulee as they traverse the elevated plateau.