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Mystic to Woburn Project

Why Are We Doing This Project?

This project will improve reliability and address the growing need for electricity in the area.

Where Is This Work Being Done?

This project includes a new 115-kilovolt (kV) underground transmission line that will connect Eversource’s Mystic Substation in Everett and Eversource’s Woburn Substation.

The line will extend approximately 8 miles between two existing substations, passing through Everett, Boston (Charlestown), Somerville, Medford, Winchester, and Woburn. The project also includes improvements within the existing fence lines of the Woburn and Mystic substations.

Information about the project is also available in Spanish, Portuguese and Haitian Creole.


About This Project

  • Route length: Approximately 8 miles
  • Line voltage: 115,000-volt (345-kilovolt [kV]) underground transmission line
  • Siting review by: EFSB

Traffic Management Plans

Working in consultation with town officials, we developed Traffic Management Plans (TMPs) for the construction of the Mystic to Woburn Line Project.

The TMPs include conditions specific to routing by the Energy Facilities Siting Board (EFSB) in its decision, a detailed site plan showing underground line location, hours of construction and area-specific traffic controls. All TMPs are subject to change and may be updated often.

Due to size, TMPs may take extra time to open/download.

When is the Work Being Done?

  • Start of construction: July 2017
  • Projected in-service date: 2023

*subject to change

About this project

  • Route length: Approximately 8 miles
  • Line voltage: 115,000-volt (345-kilovolt [kV]) underground transmission line
  • Siting review by: EFSB

Energy Facilities Siting Board

The Massachusetts ESFB Petition Filing is part of the regulatory review process, as defined by Massachusetts state statutes.

On March 9, 2017, we received approval from the EFSB to construct the project. See EFSB 15-03 Final Decision.

Construction Updates

See construction updates.

Community Outreach

Before starting construction in a community, we will mail start of construction letters to property owners along the route and conduct door-to-door outreach to nearby property owners, residents and local businesses.

Door-to-door outreach efforts for the project are currently limited to mailing letters and leaving door hangers without knocking (to avoid face-to-face communication). Full in-person communication efforts will resume when appropriate.

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