H&H provided preliminary and final design, along with design support during construction, including providing a preliminary design report, plans, design, and design check computations, ratings, specifications, and cost estimates for the replacement bridge located on U.S Route 1 Bypass between Kittery, ME, and Portsmouth, NH – a combined highway and railroad movable bridge. H&H was responsible for the movable bridge concept study and report and design for the fender system, lift pier substructure units, lift piers, lift bridge towers and lift span superstructure, operator’s house, mechanical room, electrical room, mechanical operating system, and electrical operating system. The upper portion of the bridge provides vehicular and pedestrian access, while the lower portion provides railroad service. The railroad portions of the bridge were designed in accordance with local, state, and AREMA codes and guidelines. The project was completed with the CMGC process.
The concept developed included many innovations including the first application of pre-cast post-tensioned concrete for the lift span towers, a lift span comprised of steel boxes with an FRP wind fairing, operating machinery located in the tower bases, and a single level 300-foot-long lift span with separate seating locations for the double level highway and rail bridge approaches.
Construction kicked off on January 5th, 2015, and the bridge opened to traffic in March 2018. The project has won more awards than any other project in firm history.