
The hills of Westmoreland and Allegheny counties in the early 1950s are defined here by a dense network of extraction and energy infrastructure. Numerous gas wells and pumping stations, such as the Dice Pumping Sta and Tonkin Pumping Sta, are scattered across the terrain, reflecting the region's industrial foundation. Extensive strip mining operations are mapped in detail, including the Plum Creek Mine (Active) and several others near Export.
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