
The Hanna Mine and its extensive industrial footprint dominate the landscape of this southern Oregon quadrangle. Significant mining operations are evident around Nickel Mtn, where an Open Pit Mine, several Quarries, and a network of Conveyors and Tailings piles illustrate the scale of nickel extraction during the mid-1980s. These operations were central to the local economy, particularly for the town of Riddle, which sits at the edge of this industrial activity.
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1897 · Roseburg
USGS Topo · 1:125,000
1900 · Roseburg
USGS Topo · 1:125,000
1904 · Riddle
USGS Topo · 1:125,000
1928 · Sitkum
USGS Topo · 1:125,000
1946 · Dutchman Butte
USGS Topo · 1:62,500
1948 · Dutchman Butte
USGS Topo · 1:62,500
1954 · Canyonville
USGS Topo · 1:62,500
1955 · Camas Valley
USGS Topo · 1:62,500
1955 · Roseburg
USGS Topo · 1:62,500
1955 · Medford
USGS Topo · 1:250,000