
The Monongahela River corridor defines the industrial and residential landscape of this 1960s study, where the steel towns of Glassport, Clairton, and Mc Keesport sit nestled against the water. This period shows the intense industrial footprint of the era, marked by massive slag dumps, slag pits, and a settling basin in West Mifflin. The transition from river-level industry to the suburbanizing uplands is evident in the expanding red-tinted residential areas of Pleasant Hills and Brentwood.
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