Design-Build Team Erects Twin Bridges in Vermont

摘要

Crews picked concrete precast girders as heavy as 93.5 tons from a deteriorated bridge over the Williams River and transferred them to the first of two Vermont Interstate 91 bridge replacements, illustrating a unique approach that took a lot of coordination and planning. The $50-million 1-91 Rockingham Bridge project will replace two aging steel truss bridges with a four-span spliced precast concrete girder structure—a first in Vermont. The new bridges will be 6 ft 3 in. wider than the old one, with two 12-ft travel lanes, one 4-ft shoulder and a 10-ft breakdown lane. The project is expected to finish by September, according to the Vermont Agency of Transportation (VTrans).