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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.
View an interactive Google map that shows estimated locations of manholes and duct bank that will be installed during the construction of this project.
When Is The Work Being Done?
- Start of construction*: Second quarter 2022
- Projected in-service date*: Fourth quarter 2025
* 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
Information available in additional languages
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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.
Please follow all local detour and traffic signage to move safely around work zones.
Andrew Square Substation
Week of July 7
No work is scheduled this week
Mary Ellen McCormack
Week of July 7
O’Connor Way
No work is scheduled this week.
O'Callaghan Way
No work is scheduled this week.
Morissey Boulevard
Week of July 7
No work is scheduled this week.
Savin Hill
Week of July 7
Grampian Way
No work is scheduled this week.
Springdale Street
No work is scheduled this week.
Dewar Street Substation
Week of July 7
No work is scheduled this week.
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.
- Traffic Management Plan for DCR Roads, Morrissey Blvd., Columbia Rd., Old Colony Ave
- Traffic Management Plan for Savin Hill and Mary Ellen McCormack Neighborhoods
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.
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.