
The Allegheny River and Monongahela River converge at the heart of industrial Pittsburgh, anchoring a dense network of river-and-rail infrastructure in the late 1950s. This survey illustrates the mid-century industrial footprint of Western Pennsylvania, where the Pennsylvania RR and Baltimore and Ohio RR connect major manufacturing centers like McKeesport, Johnstown, and Altoona. Beyond the urban cores, the landscape is defined by the sharp ridges of the Allegheny Front and the Pennsylvania Turnpike cutting across the terrain toward the east.
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