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  1. WEBBrush up on your Pittsburgh trivia and learn about 25 of our famous bridges, including an interactive map and the best ways to tour the City …

    • Estimated Reading Time: 9 mins
    • Bridges and Tunnels of Allegheny County and …

      WEBFeb 2, 1999 · Photos, data and history for bridge and tunnel structures in Allegheny County and Pittsburgh, Pennsylvania. Once a flat sea floor, millions of years of erosion have carved the surface of Allegheny County …

    • WEBThe current version, built in 1881-1883, is the second steel bridge in the United States. The practice of replacing old bridges with newer, updated versions while keeping the name has been a common one in …

    • Liberty Bridge - HistoricBridges.org

      WEBJul 10, 2009 · View Photos. and Videos. View Maps. and Links. Facility Carried / Feature Intersected. Crosstown Boulevard (Liberty Avenue) Over Monongahela River. Location. Pittsburgh: Allegheny County, …

    • Bridges and Tunnels of Allegheny County and Pittsburgh, PA