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about the projectsTIMELINE OVERVIEW

The timeline below is provided to give viewers an approximate sense of how construction will progress between now and 2018. As the temporary bridge is upstream of the original alignment where the new bridge will be built, much of the construction can take place "off line," that is without impacts to traffic. Throughout construction, at least one sidewalk will be available to pedestrians. During periods of reduced capacity on the temporary bridge, the community will be alerted through this website, MassDOT social media, the project email list, and other media channels. Construction requirements or unforeseen emergencies may have an impact on the timeline shown here. 

As noted on the Project Description page of this website, the job is currently 650 days behind schedule due to fabrication issues with the bridge's sheaves. Those issues have now been corrected and the project team will take all safe steps to reduce the job's overall delay.

  • Phase 1: Construction of the lifting span and towers, the north side dolphins and fenders (the system that protects the bridge from collisions with ships), four of the six approach spans and rehabilitation of the retaining walls.  This phase will take place off-line without impacts to traffic.  This phase runs is now projected to run through April, 2017.
  • Phase 2: Connection of the new bridge to the approaches, set for approximately May to October, 2017.  This phase will include a reduction in capacity on the temporary bridge while the approach ramps are connected to the new structure.  Also included in this segment of the job is testing of the machinery which lifts the movable span.
  • Phase 3: All four lanes open and all traffic on the new bridge.  Construction of the sidewalks, south side dolphins and fenders and removal of the old temporary bridge.  Approximately November 2017-June 2018.
Motorists are reminded that partial closures of the temporary bridge associated with the structure's maintenance will continue throughout the construction period, but are independent of the construction process.


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