MassDOT, the City of Boston, and the Department of Conservation and Recreation are about to execute an agreement to construct a temporary bridge parallel to the existing span that is intended to reduce the overall construction period by six months. The bridge will carry vehicles, pedestrians and cyclists, and will support the temporary relocation of utilities. Working out the details of this agreement has delayed the start of construction, but initial utility relocation is beginning in October 2018 during off peak hours and will continue for several months. The contractor, JF White, is preparing a detailed construction schedule based on this new approach, with the anticipated schedule calling for construction to be completed by late 2023.
Use of a temporary bridge provides several benefits over the original construction concept which would have used portions of the existing, structurally deficient bridge in phases, and would have required reduction of traffic to one lane in each direction for a brief period. The new plan will provide two inbound and one outbound lane throughout construction. MassDOT is now preparing outreach plans, and we will schedule a briefing for members of A Better City in the near future.