
Helena and its industrial neighbor East Helena anchor the western edge of this mid-century landscape, where the Missouri River is harnessed by the Canyon Ferry Dam and Hauser Dam. This era of western development is defined by the heavy infrastructure of three major rail lines—the Northern Pacific, Great Northern, and the Chicago Milwaukee St Paul and Pacific—which navigate the dramatic elevations of the Big Belt Mountains and the Little Belt Mountains.
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This is the sole edition of this map. No revisions or reprints were ever made.
1886 · Great Falls
USGS Topo · 1:250,000
1886 · Fort Logan
USGS Topo · 1:250,000
1886 · Little Belt Mts.
USGS Topo · 1:250,000
1888 · Three Forks
USGS Topo · 1:250,000
1889 · Big Snowy Mountain
USGS Topo · 1:250,000
1889 · Helena
USGS Topo · 1:250,000
1890 · Fort Benton
USGS Topo · 1:250,000
1891 · Livingston
USGS Topo · 1:250,000
1891 · Big Timber
USGS Topo · 1:125,000
1892 · Fort Benton
USGS Topo · 1:250,000