To allow for the final work on this historic $125 million MassDOT project, the Chelsea Street Bridge over Chelsea Creek at the Boston/Chelsea line is closed until December 1 with detours in place.
In the views at left, the new lift spans are in position to be launched.
The launching of the components of the new lift span is scheduled to occur over several days in late September.
The navigable channel below will be closed to marine traffic during this operation.
The new bridge will provide for four lanes of traffic two pedestrian sidewalks.
The project is scheduled to be completed in spring 2012.