Oblique of bridge, looking west from south bank of Allegheny River at lock and dam no. 3. - Bessemer and Lake Erie Railroad, Allegheny River Bridge, Spanning Allegheny River, East of Pennsylvania Turnpike (I-76), Oakmont, Allegheny County, PA; Porter, H T; Larsson, C G, E; American Bridge Company; Arthur McMullan Contracting Company; Bessemer and Lake Erie Railroad; Steel Corporation; Transtar, Incorporated; DeLony, Eric N, project manager; Pennsylvania Historical and Museum Commission, sponsor; Consolidated Rail Corporation (Conrail), sponsor; Spivey, Justin M, historian; Lowe, Jet, phot
Oblique of bridge, looking west from south bank of Allegheny River at lock and dam no. 3. - Bessemer and Lake Erie Railroad, Allegheny River Bridge, Spanning Allegheny River, East of Pennsylvania Turnpike (I-76), Oakmont, Allegheny County, PA; Porter, H T; Larsson, C G, E; American Bridge Company; Arthur McMullan Contracting Company; Bessemer and Lake Erie Railroad; Steel Corporation; Transtar, Incorporated; DeLony, Eric N, project manager; Pennsylvania Historical and Museum Commission, sponsor; Consolidated Rail Corporation (Conrail), sponsor; Spivey, Justin M, historian; Lowe, Jet, photographer
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