
The Missouri River cuts a deep course through the Helena National Forest in this 1970s study, where the waters are captured by Hauser Lake. This area north of the state capital reflects a landscape heavily shaped by mineral extraction and water management for the arid valley below. The Eldorado Strip Mine and the Golden Charm Mine indicate the region's mining legacy, while the Helena Valley Canal and Helena Regulating Reservoir show the infrastructure required to divert water toward agricultural use.
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2 editions found
1886 · Fort Logan
USGS Topo · 1:250,000
1899 · Helena
USGS Topo · 1:62,500
1948 · White Sulphur Springs
USGS Topo · 1:250,000
1950 · Canyon Ferry
USGS Topo · 1:62,500
1950 · East Helena
USGS Topo · 1:62,500
1958 · White Sulphur Springs
USGS Topo · 1:250,000
1961 · White Sulphur Springs
USGS Topo · 1:250,000
1962 · Upper Holter Lake
USGS Topo · 1:24,000
1962 · Hogback Mountain
USGS Topo · 1:24,000
1962 · Nelson
USGS Topo · 1:24,000