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Mystic to Woburn Line Project

To improve reliability and address growing need for electricity identified by ISO-NE, New England’s power grid manager, Eversource is constructing the Mystic to Woburn Line Project.

At Eversource, we're always working to serve you better. The project includes a new 115-kilovolt (kV) underground transmission line that will connect the Mystic Substation in Everett, Mass., and the Woburn Substation. The line will extend approximately 8 miles between the two substations and will pass 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.

Map of the project route

Project Facts:

  • Route length: Approximately 8 miles
  • Towns: Everett, Boston (Charlestown), Somerville, Medford, Winchester, and Woburn, Mass.
  • Line voltage: 115,000-volt (115-kV) underground transmission line
  • Siting review by: Energy Facilities Siting Board (EFSB)
  • File Environmental Notification Form for review under the Massachusetts Environmental Policy Act (MEPA): April 30, 2015
  • File Siting Petition with the EFSB: May 20, 2015
  • Petition approval by the EFSB: March 9, 2017
  • Start of construction: July 2017

Estimated Timetable (subject to change):

  • Estimated in-service date: December 2021

Energy Facilities Siting Board

For an electric transmission line project, such as the Mystic to Woburn Line Project, the Massachusetts Energy Facilities Siting Board (EFSB) Petition Filing is part of the siting regulatory view process, as defined by Massachusetts state statutes. On March 9, 2017, Eversource received approval from the EFSB to construct the Mystic to Woburn Line Project. See EFSB 15-03 Final Decision.

Traffic Management Plans

Working in consultation with town and state officials, including the MA Department of Transportation, Eversource has developed a Traffic Management Plan (TMP) for each section of the Mystic-Woburn Line Project.

The TMPs include conditions specific to routing by the 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.

Construction Updates

Eversource is committed to updating neighbors, businesses and all community members about project activities, especially during construction.

The sections below feature construction updates for each town. Please note that the project work is not expected to interrupt electric service to homes or businesses.

In-street construction will occur in 2021.

Mystic Substation  Construction started at the Mystic Substation on Alford Street in late July 2017. All construction activities are within the fence at the substation. No substation expansion is planned. 

Mystic Substation Construction started at the Mystic Substation on Alford Street in late July 2017. All construction activities are within the fence at the substation. No substation expansion is planned.

Here’s what to expect in Medford from the Mystic to Woburn Line Project this week:

Construction activity in Medford is now complete for the winter.  Crews will return to Medford in the spring of 2021 to complete remaining sections of work on Winthrop Street and Main Street.   

Eversource thanks Medford residents, businesses and city officials for their cooperation and patience as crews completed work on Mystic Avenue, Main Street, South Street and Winthrop Street over the past several months.  

 

Here’s what to expect in Somerville from the Mystic to Woburn Line Project this week:

There is no construction activity in Somerville at this time. Crews will return to Somerville in the spring of 2021 to complete remaining sections of work on Mystic Avenue.  

Here’s what to expect in Winchester from the Mystic to Woburn Line Project this week: 

Construction activity in Winchester is now complete for the winter.  Crews will return to Winchester in the spring of 2021 to complete remaining sections of work on Fletcher Street, Church Street, Bacon Street, Main Street.   

Eversource thanks Winchester residents, businesses and town officials for their cooperation and patience as crews completed work on Pond Street, Woodside Road, Wildwood Street, Fletcher Street and Bacon Street over the past several months. 

 

Construction is ongoing at the Woburn Substation on Pond Street. Currently, all construction activities are inside the fence at the substation.

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). Pull in-person communication efforts will resume when appropriate.

CONTACT INFORMATION

For more information about the Mystic to Woburn Line Project, send an email to ProjectInfo@eversource.com or call 800-793-2202.