Iron Bridge Road Bridge

The Iron Bridge Road Bridge has some really interesting history. It was originally constructed as a single span bridge in 1868, using ashlar masonry abutments. For context, this is three years after the end of the American Civil War. In 1924, the original superstructure was demolished, and a new bridge was constructed. They recycled the truss from an old bridge (truss is circa 1905, but the exact year and original bridge site is unknown). The recycled truss was only 76 feet long, whereas the old bridge was 103 feet long. To compensate for the discrepancy, they added a pier and a second span utilizing rolled stringers. The entire bridge still uses a wooden plank decking, with a surprising amount of vegetation growing in the shoulders. So, in summary; the current bridge consists of two 1868 abutments, one 1924 pier, one circa 1905 truss, and one 1924 rolled girder simple span.

The truss is a seven-panel, rivet-connected, Warren Pony Truss. It is composed of angles, which are set back-to-back with spacers, and the top chord is braced with laced outriggers. The trusses have numerous welded patches for strengthening or as repairs. There is evidence that the flooring system was modified, which most likely happened when the truss was moved. The floor beams have holes punched in the top flanges and webs, which indicates that they are most likely salvaged material. One other unusual feature about this bridge is the hanging floor beams on an otherwise all riveted bridge. However, this is most likely a modification, rather than the original construction.