
Extensive industrial activity and shifting infrastructure define this portion of the Pennsylvania coal country at the intersection of Allegheny, Washington, and Beaver counties. Numerous Strip Mines and tailings dumps dominate the topography between Imperial and Santiago (Tyre PO), illustrating the heavy extraction that shaped the mid-century local economy. This landscape is a complex network of resource transport, where the Montour RR and South Fork Montour Run navigate the valleys between prominent landmarks like Bald Knob.
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7 editions found
1901 · Beaver
USGS Topo · 1:62,500
1904 · Beaver
USGS Topo · 1:62,500
1904 · Carnegie
USGS Topo · 1:62,500
1904 · Burgettstown
USGS Topo · 1:62,500
1906 · Burgettstown
USGS Topo · 1:62,500
1906 · Carnegie
USGS Topo · 1:62,500
1906 · Sewickley
USGS Topo · 1:62,500
1908 · Sewickley
USGS Topo · 1:62,500
1908 · Carnegie
USGS Topo · 1:62,500
1951 · Canton
USGS Topo · 1:250,000