Ohio & Baltimore Shortline Railway

Reporting mark: O&BSL
AVR - Whitehall Tunnel (Allegheny County, Pennsylvania)
Built 1899
Tunnel on Allegheny Valley Railroad
Open to traffic

O&BSL - Dunbar Creek Bridge (Fayette County, Pennsylvania)
Mostly removed and abandoned deck truss bridge over Dunbar Creek on Railroad
Mostly removed and abandoned

O&BSL - Youghiogheny River Bridge (Fayette County, Pennsylvania)
Lost Deck truss bridge over Youghioogheny River on Railroad (O&BSL)