A seven-span, post-tensioned concrete box girder bridge now stands in place of a 29-span steel and timber girder bridge across a busy railyard. The original bridge was first built in the 1930s.
The $242-million project to increase the tunnel's clearance for double-stack intermodal trains and improve drainage is now scheduled to complete this year.
Skanska USA Building Co. has an eight-step enabling process that it uses to evaluate all its new technologies, which it deployed in the construction of the LaGuardia Airport Terminal B redevelopment in New York City.
Contract is part of a larger project to double track capacity crossing the Potomac River in Washington, D.C., addressing a key chokepoint for the heavily used passenger rail corridor.