Pittsburgh & Castle Shannon Railroad
Reporting mark: P&CS
PRCo - McKinley Park Viaduct (Allegheny County, Pennsylvania)
Built 1929;Lost Pony/through plate girder bridge over Bausman Street on Pittsburgh RailwaysReplaced by a new bridge
PRCo - Oak Viaduct (Allegheny County, Pennsylvania)
1928Lost Warren pony truss bridge over Saw Mill Run, Saw Mill Run Boulevard, & Colerain Street on Pittsburgh RailwaysReplaced by a new bridge
PRCo - Reflectorville Viaduct (Allegheny County, Pennsylvania)
Built sometime between 1872-1874Lost Timber stringer bridge over Edgebrook Avenue on Pittsburgh RailwaysReplaced by a new bridge
PRCo - Warrington Avenue Trestle (Allegheny County, Pennsylvania)
Built 1928; Replaced ?Lost Pony/through plate girder bridge over Warrington Avenue on Pittsburgh RailwaysReplaced by a new bridge
WLE - Castle Shannon Viaduct (Allegheny County, Pennsylvania)
Deck plate girder bridge over PAT Blue Line and Castle Shannon Blvd on W&LE RROpen to traffic