
The Thomas Fork Valley anchors this 1970 study of the high-altitude borderlands between Idaho and Wyoming. Agricultural infrastructure is concentrated in the southern basin near Geneva, where water management is visible through the Taylor Ditch and the Thomas Fork Canal. The landscape is dominated by the intersecting slopes of the Gannett Hills, Preuss Range, and Sublette Range, while the Caribou National Forest and Bridger National Forest cover the northern and eastern reaches. A primitive transportation network of jeep trails and a route designated as the Boulevard provides access across the ridgelines of Table Mountain. Near Salt Creek, a Gaging Station monitors the drainage patterns that define this rugged watershed during the early 1970s.
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1909 · Montpelier
USGS Topo · 1:125,000
1911 · Montpelier
USGS Topo · 1:125,000
1915 · Crow Creek
USGS Topo · 1:62,500
1921 · Afton
USGS Topo · 1:125,000
1936 · Cokeville
USGS Topo · 1:96,000
1942 · Cokeville
USGS Topo · 1:125,000
1949 · Snowdrift Mountain
USGS Topo · 1:24,000
1951 · Snowdrift Mountain
USGS Topo · 1:24,000
1955 · Preston
USGS Topo · 1:250,000
1958 · Preston
USGS Topo · 1:250,000