1.2K views | A $13.1 million rehabilitation of the Armstrong Tunnel in Pittsburgh is currently underway. The project marks another significant chapter in the story of the tunnel, which has provided a vital link between Second Avenue and Forbes Avenue since it opened in 1927. To learn more about the tunnel’s history, watch our video at: https://youtu.be/6c0ahgzzwEM For information about the rehabilitation project, visit https://arcg.is/1nOP5y | Allegheny County Government | Facebook

The Pigeon Mountain Tunnel. March 17, 1888 the construction of this 92 mile stretch of the Chattanooga Southern Railway began. The line would run from Chattanooga to Gadsden serving the transportation needs of agricultural cotton and iron ore. It was proposed to extend the lines to Columbus, GA to connect with independent lines giving a route to Florida and coast points. It became apparent that there was not enough freight via passengers or cotton, and the iron ore could not be economically mine