
The Allegheny River carves a deep path through the northern coal and oil country of western Pennsylvania, where the borders of Butler, Armstrong, and Clarion counties converge. This landscape is defined by the heavy footprint of extractive industry, featuring numerous strip mines and oil wells that dot the uplands. Settlements like Petrolia, Parker, and West Monterey are clustered near the river and rail lines, including the Baltimore and Ohio and Conrail networks.
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