
Mining operations and high-altitude alpine terrain dominate this mid-century survey of the San Miguel and San Juan County line. The settlement of Ophir serves as the focal point, situated near active extraction sites like the Badger Mine and the Silver Bell Mine. This era of the district is marked by the presence of the Ophir Loop Sch, serving the families of the mining camps situated beneath the Ophir Needles.
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7 editions found
1897 · Telluride
USGS Topo · 1:62,500
1897 · Silverton
USGS Topo · 1:62,500
1898 · Engineer Mountain
USGS Topo · 1:62,500
1900 · Engineer Mountain
USGS Topo · 1:62,500
1900 · Needle Mountains
USGS Topo · 1:62,500
1901 · Silverton
USGS Topo · 1:62,500
1902 · Needle Mountains
USGS Topo · 1:62,500
1902 · Silverton
USGS Topo · 1:62,500
1904 · Telluride
USGS Topo · 1:62,500
1908 · Engineer Mountain
USGS Topo · 1:62,500