Engineering, Transportation

Mitchell River Bridge stands open waiting on sailboats in Chatham, Massachusetts. This historic wooden bascule bridge is the last surviving drawbridge in Massachusetts.

AECOM was hired to re-engineer the structurally deficient bridge that could no longer fully open and also had a failing road structure. Being an historic structure required replacing the wood timber design with similar components. The new $14 million bridge design features a wooden superstructure, including the road surface, railings and sidewalks. Its substructure is comprised of concrete-filled steel pilings – the parts in contact with the water – and concrete pile caps that support the superstructure.

This exposure was taken at 1/100th of a second at f 8.0 at ISO 200 on a Canon 1Dx mk II camera with 70-200mm lens with a heliopan circular polarizing filter.

Photo © Robb Williamson / AECOM

Originally published Jul 1, 2016

Author: Robb Williamson