Phase 1 of the $44 million I-91 Rockingham VT Bridge Replacement Project is nearing completion. The north bound bridge that carries Vermont I-91 over the Williams River will be complete ready for traffic by the end of November, 2018.
The new 880-foot-long bridge is a 4-span structure, with spliced concrete beams and a concrete bridge deck. The bridge deck is 130 ft. above the Williams River. This project will complete Reed & Reed’s first ever spliced concrete beam bridge. The Beam structure consists of five runs of 7 individual concrete beams that were installed on temporary support framework, aligned and held in position with thirty strong backs. Cast in place concrete closures were placed between the ends of the beams and then three, 19 strand tendons running from abutment to abutment were installed, tensioned and grouted. Once the strands were tensioned and all 76 concrete diaphragms were placed the supporting framework and strong backs were removed, bridge decking and reinforcing installed followed by the deck and barrier placements. After new South Bound crossovers are complete traffic will be switched to the new structure in early December and the process of demolition and replacement of the south bound structure will begin.