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Andrew Square to Dewar Street Reliability Project

Why Are We Doing This Project?

To improve the reliability of Boston’s electric system now and into the future, a new 2.1 mile underground 115-kilovolt (kV) transmission line will connect Eversource's Andrew Square substation to the Dewar Street substation.

The project also includes improvements within the existing fence lines of our substations, to further ensure the delivery of safe, reliable power.

Where Is This Work Being Done?

The 2.1-mile transmission line will run under streets in Dorchester and South Boston, connecting our Andrew Square and Dewar Street substations.

When Is The Work Being Done?

  • Start of construction*Second Quarter 2022
  • Projected in-service date*: Fourth Quarter 2024

* Pending all necessary siting and permit approvals

Construction Updates

We are committed to keeping neighbors, businesses and community members informed on project activities during construction. The schedule may change due to weather or other unexpected circumstances.

We take every safety precaution while working in local communities, and all people working on the construction carry proper identification. 

This work is not expected to interrupt electric service to homes or businesses.

Andrew Square Substation

Week of March 18

There will be no work in Andrew Square this week.

Mary Ellen McCormack

Week of March 18

Crews will be mobilized on O’Connor Way, just outside the Mary Ellen McCormack Community, continuing the week of March 11, to excavate for duct-bank along the bend of O'Connor Way. Work will last the duration of the week.

  • All work will be contained within a temporary work zone along the left side of O’Connor Way.
  • 'No parking' signs will be posted along O’Connor Way. There will be no parking in these spots during the stated work hours.
  • Equipment needed to complete this work includes a concrete cutting saw, jackhammers, excavators and dump trucks.
  • Thru and local traffic will not be able to access O'Connor Way. A traffic detour will be in place on Kemp Street for access to Mary Ellen McCormack.

Morissey Boulevard

Week of March 18

There will be no work on Morrissey Boulevard this week.

Savin Hill

Week of March 18

Crews will be conducting drilling activities in preparation for jack and bore work.

  • All work will be contained within the Springdale Street temporary work zone
  • This work will involve the use of a drill and generators, this equipment will produce some noise during work hours when in use
Crews will be continuing work on Grampian Way, outside Savin Hill Park, to conduct test pits. This work is expected to last all week.
  • All work will be conducted within a temporary work zone along the westbound lane of Grampian Way.
  • 'No parking' signs will be posted along Grampian Way. There will be no parking in these spots during the stated work hours.

Dewar Street Substation

Week of March 18

Crews will be excavating and conducting survey work within the substation footprint in preparation for an ongoing control house upgrade.

This work will include the use of excavators, concrete cutting saws, and jackhammers.

Traffic Management Plans

Working in consultation with town and state officials, including the Massachusetts Department of Transportation, we developed a traffic management plan (TMP) for each section of the project.

The TMPs include a detailed site plan, hours of construction and area-specific traffic controls.

All TMPs are subject to change and may be updated often.

Siting Review

We filed a petition with the Massachusetts EFSB for approval to construct and operate the new 115-kV transmission line.

The petition filing is part of the regulatory review process, as defined by Massachusetts state statutes.

On March 1, 2019, we submitted the following Siting Petition to the EFSB:

The EFSB held a Public Comment Hearing on June 26, 2019, in Boston, where individuals and groups affected by the initial petition were given the opportunity to voice feedback to the Siting Board.

The Siting Board conducted a remote Siting Board meeting using Zoom on June 30, 2021, at 1 p.m. to listen to comments and vote on whether to approve, approve with conditions or reject the project.

The Siting Board's Final Decision to approve the project was issued on July 2, 2021.

Community Outreach

We're committed to engaging city officials, residents, businesses, community groups and other stakeholders about project activities through municipal briefings, mailings, virtual meetings and door-to-door outreach, while adhering to COVID-19 social distancing and other related health and safety guidelines.

Sign up for weekly updates here.

Have Questions?

Keeping the lines of communication open is an important part of our work in your community.

For more information about this project, please call the project information hotline at 1-833-836-0302 or email ProjectInfoMA@eversource.com.