C&C recently participated in an inspection of the steel truss-under bridge connecting Boston’s Long Island to the mainland in Quincy, Massachusetts. The Long Island Bridge is a 16-span, approximately 3,500 foot-long structure carrying a two-lane road between Long Island to the north and Moon Island to the south in Boston Harbor.
Work was performed from a barge-mounted bucket and from snoopers working from the roadway. Many of the vertical members of the trusses were found to be rusted through, and several floor beams were no longer supporting the deck above. Severe load restrictions and partial lane closures were instituted to help prevent any future structural failures.