1982 Map of Cochran Reservoir

About this map

Cochran Reservoir sits at the heart of this high plains landscape, where the drainage systems of the North Fork Willow Creek, Middle Fork Willow Creek, and South Fork Willow Creek converge. The topography is defined by significant draws and ridges, most notably Zimmerman Draw and Torgerson Draw, which illustrate the erosion patterns characteristic of the Montana and Wyoming borderlands. The map traces the boundary between Carter County and Crook County, as well as the Montana and Wyoming state line, marking a sparsely settled ranching or resource area. Infrastructure is limited to essential corridors like the Pipeline and the prominent Ridge Road, which follows the high ground above Thompson Creek and Nelson Washout. This survey provides a precise look at the water management and transport routes across this remote interstate frontier in the early 1980s.