Checkered House Bridge Truss Widening Project, Richmond, Vt.
The longest of Vermont's three remaining Pennsylvania through trusses, the 350-ft, 85-year-old steel span over the Winooski River, was too narrow and in need of a significant structural upgrade. The project team had to keep the original superstructure intact and widen the entire bridge by 12.6 ft. In addition, work had to comply with National Historic Preservation Act and U.S. Dept. of Transportation standards.