New Hampshire Department of Transportation — East Kingston NH Accelerated Bridge Rehab over an Active Rail Line

Originally built in 1937, a bridge in East Kingston carries 2,200 vehicles a day over an Amtrak Downeaster commuter rail line. In desperate need of rehabilitation – the bridge’s last major rehabilitation was back in 1969 – the New Hampshire Department of Transportation decided to use a new construction format that would allow it to replace the structure within 28 days without disrupting train service underneath it. New technologies used in this $1.5 million project were Prefabricated Bridge Units and Ultra High Performance Concrete. The bridge was closed to help expedite the construction and save money. Not only did this project deploy new technologies never before used by the department, it was also opened to the public three days ahead of schedule.