Nettie Mine sits at the heart of this high-elevation landscape in Jefferson County, where the headwaters of several major drainages begin. The terrain is defined by a dense network of mountain parks and springs, suggesting a region centered on livestock grazing and water management. Large landholdings like Keogh Ranch, Tomahawk Ranch, and Simonsen Ranch are spread across the Whitetail Deer Creek valley, while infrastructure such as Keogh Dam and Moulton Creek Dam Number 1 indicates the importance of water storage in this arid mountain environment.
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1886 · Fort Logan
USGS Topo · 1:250,000
1888 · Three Forks
USGS Topo · 1:250,000
1889 · Helena
USGS Topo · 1:250,000
1893 · Helena
USGS Topo · 1:250,000
1893 · Dillon
USGS Topo · 1:250,000
1894 · Three Forks
USGS Topo · 1:250,000
1895 · Three Forks
USGS Topo · 1:250,000
1899 · Boulder
USGS Topo · 1:125,000
1899 · Helena
USGS Topo · 1:250,000
1903 · Helena
USGS Topo · 1:250,000