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.
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
- Phase 1:
Construction of the lifting span and
towers, the north side dolphins and fenders (the system that protects
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
new structure. Also included in this
segment of the job is testing of the machinery which lifts the movable
- 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
bridge. Approximately November