Bessemer & Lake Erie Railroad Bridge
Introduction The '''Bessemer & Lake Erie Railroad Bridge''' is a truss bridge that carries the Canadian National Railway's  Bessemer and Lake Erie Railroad division across the Allegheny River between the Pittsburgh suburbs of Plum and Harmar Township, Pennsylvania. In 1897, a single-track trestle and viaduct was built on this site; in 1918, the original piers were doubled in width, the current double-tracked structure built alongside, and then slid into place. The original north trestle approach was buried in slag dumped from an adjacent temporary filling trestle.
See also *List of bridges documented by the Historic American Engineering Record in Pennsylvania*List of crossings of the Allegheny River
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