Thoeny Hills and the surrounding rangeland of Phillips County define this high-plains landscape along the Montana-Saskatchewan border. The map illustrates a region managed for water resources in a semi-arid environment, characterized by numerous small-scale water management features. Prominent among these are Clausen Dam, PR-83 Dam, and Burke Number 1 Dam, which collect runoff for local utility. The natural drainage of Cottonwood Creek and the deep incisions of Dunham Coulee and Kennedy Coulee carve through the terrain, while Grag Reservoir provides a significant focal point for the western portion of the quadrangle. This 2011 survey documents a sparsely settled agricultural and ranching district where the placement of dams and reservoirs remains critical to land use.
8 named features on this map. Tap any name to fly to it.
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This is the sole edition of this map. No revisions or reprints were ever made.
1920 · Cowan
USGS Topo · 1:125,000
1954 · Glasgow
USGS Topo · 1:250,000
1957 · Glasgow
USGS Topo · 1:250,000
1958 · Glasgow
USGS Topo · 1:250,000
1984 · Thoeny Hills East
USGS Topo · 1:24,000
1984 · Pea Lake
USGS Topo · 1:24,000
1984 · Whitewater East
USGS Topo · 1:24,000
1984 · Dead Horse Coulee
USGS Topo · 1:24,000
1984 · Thoeny Hills West
USGS Topo · 1:24,000
1984 · Salsbery Reservoir
USGS Topo · 1:24,000