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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

About this project

  • Route length: Approximately 2.1 miles
  • Line voltage: 115,000-volt (115-kV) underground transmission line
  • Siting review by: EFSB
  • Construction Type Descriptions

Information available in additional languages

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 November 27

Eversource 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. 

Crews will be mobilizing to Andrew Square, at the intersection of Father Songin Way, O’Connor Way, and Dorchester Avenue starting Monday, November 27 to begin excavating for conduit installation. Work will last the duration of the week until Friday, December 1.

All work will be contained within two sequential temporary work zones at the intersection of Dorchester Avenue, O’Connor Way and Father Songin Way.

'No parking' signs will be posted along Dorchester Avenue, Father Songin Way, and O’Connor Way alongside the work zone: there will be no parking in these spots during the stated work hours, 9:30 a.m. to 3:30 p.m.

Equipment needed to complete this work includes a concrete-cutting saw, jackhammers, excavators and dump trucks.

 

Mary Ellen McCormack

Week of November 27

There will be no work in Mary Ellen McCormack this week.

Morissey Boulevard

Week of November 27

There will be no work on Morrissey Boulevard this week.

Savin Hill

Week of November 27

There will be no work in Savin Will this week.

Dewar Street Substation

Week of November 27

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.