
The Blackfoot River carves through the central landscape of this Powell County survey, defining a valley where water management and conservation efforts are the primary imprint on the land. The presence of the North Helmville Canal and numerous waterways like Wasson Creek and Spring Creek illustrate a landscape engineered for irrigation and habitat. Large tracts are dedicated to environmental preservation, including the Blackfoot Valley Conservation Area and the Powell County Waterfowl Production Area, which protect the wetlands and riparian zones surrounding Kleinschmidt Creek.
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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
1902 · Ovando
USGS Topo · 1:125,000
1903 · Coopers Lake
USGS Topo · 1:125,000
1903 · Helena
USGS Topo · 1:250,000
1905 · Ovando
USGS Topo · 1:125,000
1919 · Drummond
USGS Topo · 1:125,000
1921 · Drummond
USGS Topo · 1:125,000
1947 · Butte
USGS Topo · 1:250,000