Chelsea Street Bridge Replacement

The Chelsea Street Bridge project involves the replacement of a truss-type structure that spans 450 feet and will provide 175 feet of vertical clearance when raised. 

The new vertical lift movable bridge will carry Chelsea Street over the Chelsea Creek in Boston and Chelsea. The new bridge and approach roadway will match the footprint of the existing bridge and will provide for four lanes of traffic (two in each direction) and two pedestrian sidewalks. Approach roadways will be reconstructed to meet existing local streets and a complete warning signal and gate system is included in the project.

As part of our construction engineering services for the Chelsea Street Bridge Replacement Project, FINLEY has developed an erection scheme for the new 450 feet long vertical lift bridge that allows the truss to be erected on-site and launched into its final position.

The launch sequence is particularly challenging as the vertical lift span truss must be in position and raised within 60 hours to re-open this critical navigational channel in the Chelsea River. FINLEY is designing the specialized launching equipment, temporary supports and launching geometry.

The $125 million replacement bridge is scheduled to open in 2012.