
The Grant-Kohrs Ranch National Historic Site preserves a significant landscape where the open-range cattle era is memorialized in the Clark Fork valley. Water management defines the surrounding terrain, evidenced by extensive engineering projects like the Rock Creek Ditch, Brand Ditch, and the West Side Canal that lace through the hills. Near the small settlement of Garrison, the landscape is carved by numerous draws and gulches, including Mullan Gulch and Dry Gulch, which reflect the complex topography of Powell County.
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This is the sole edition of this map. No revisions or reprints were ever made.
1889 · Helena
USGS Topo · 1:250,000
1893 · Helena
USGS Topo · 1:250,000
1899 · Helena
USGS Topo · 1:250,000
1903 · Helena
USGS Topo · 1:250,000
1947 · Butte
USGS Topo · 1:250,000
1958 · Butte
USGS Topo · 1:250,000
1958 · Avon
USGS Topo · 1:62,500
1958 · Garrison
USGS Topo · 1:62,500
1959 · Deer Lodge
USGS Topo · 1:62,500
1960 · Butte
USGS Topo · 1:250,000