The company provided design services to the West Virginia Department of Transportation for the new crossing, which features a 235m main span, believed to be the longest concrete box girder span in the USA. The new Kanawha River Bridge will have a total length of 907m. The 20m-wide deck will accommodate four lanes of traffic plus hard shoulders, all on a single cell box girder. The continuous girder has a varying depth of 4.9m to 11.6m at the main span and a constant 4.9m depth at the approaches. The bridge has been designed to have expansion joints at the abutments only.