
The Ohio River corridor south of Freedom serves as a dense industrial and transit hub in this mid-century topographic record. The Pennsylvania and Pittsburgh & Lake Erie railroads flank the river, supporting the developed riverfronts of Aliquippa, Baden, and Conway, where the Conway-Pittsburgh Landing Field is situated. This lowland activity contrasts sharply with the interior hills of Economy and New Sewickley, where the landscape is defined by rural institutions like Big Knob Grange and Economy Grange.
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