Loading map...

2020 Map of West Alkali Reservoir

Name: 2020 Topographic Map of West Alkali Reservoir
Creator: U.S. Geological Survey
Published: 2020
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2020

About this map

West Alkali Reservoir and its surrounding drainage basin define this high plains landscape in Phillips County. The area is characterized by a complex network of coulees that channel seasonal runoff toward the local water bodies, including Williams Coulee Reservoir and Partnership Reservoir. These man-made features are critical infrastructure in an arid environment, supporting the grazing lands that stretch across the township and range divisions.

Surface drainage follows prominent landmarks such as W Alkali Cr and Wild Horse Cr, while named geographic depressions like Rudolph Valley provide distinct topographical markers. The numerous coulees, from Threemile Coulee to the branching Halfway Coulee system, illustrate the erosional patterns of the Montana prairie. This survey documents the intersection of modern resource management with the natural flow of the land in the early twenty-first century.