
The Allegheny River, Ohio River, and Monongahela River converge at the industrial heart of Pittsburgh, anchoring a dense network of steel towns and rail hubs. Moving east across the Allegheny Plateau, the landscape transitions into the sharp ridges of the Allegheny Mountains, where the Pennsylvania Turnpike cuts through the terrain. The map captures a post-war industrial peak for cities like Altoona and Johnstown, showing the complex relationship between the region's heavy manufacturing centers and the rugged topography of Laurel Hill and Chestnut Ridge.
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This is the sole edition of this map. No revisions or reprints were ever made.
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