2011 Map of Chapman Coulee

About this map

Cornwell Reservoir and its associated Cornwell Dam sit at the northern edge of this landscape, anchoring a network of drainages that define this portion of Valley County. The terrain is characterized by numerous seasonal coulees, including Alkali Coulee and Wire Grass Coulee, which channel runoff toward the more substantial Milk River corridor in the southwest. This area demonstrates the sparse but functional infrastructure of the Montana plains, where water management is critical to the local economy.