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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: 2020

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 Mass. 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, area-specific traffic controls and more.

Some of the TMPs below are large in size and might take some time to load or download.

Please note, TMPs are subject to change and may be updated often.

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.

Pre-construction survey activity, including utility mark-outs and test pits (areas where we open the pavement to locate existing underground utilities), will occur on Alford Street and Ryan Park during the week of July 6.

Construction within public roadways around Sullivan Square will begin in the third quarter of 2020, after we receive all necessary permits.

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.

 
Over the next several weeks, construction activity will continue within public streets at the following locations:
  • Winthrop Street between Victory Park and Lawrence Road
  • Winthrop Street between Exeter Street and Smith Lane
  • Winthrop Street between Robinson Road and the Winchester town line
  • South Street between Touro Avenue and Main Street
  • Mystic Avenue between Billings Avenue and Crescent Street

Vehicle and pedestrian detours will be necessary during work hours. Steel road plates will be used to safely secure the area at the end of the day.

The work zone on South Street will require a temporary street closure and alternate traffic pattern on South Street during work hours. Medford Police details will be on site to facilitate detours and support traffic management.

A fixed (temporary) work zone will remain in place 24-hours a day on Winthrop Street near Victory Park and will be necessary as crews remove ledge and dig trenches to contain the new transmission line. Elements of this work zone at this location will remain in place 24-hours a day. This activity will not require blasting. 

Construction activity at each of these locations will occur between 7 a.m. and 4 p.m., Monday through Friday.  

Pedestrian detours and parking restrictions will be necessary for the duration of the work.  Parking restrictions will be clearly posted in advance. 

   
 

Pre-construction survey activity, including utility mark-outs and field tests (areas where we open the pavement to locate existing underground utilities), will occur on Mystic Avenue during the week of July 6.

No additional construction activity within the public right-of-way is anticipated until the second quarter of 2020.

Over the next several weeks, construction activity will continue within public streets at the following locations:

  • Woodside Road between Pond Street and Norfolk Road
  • Wildwood Street between Woodside Road and Fletcher Street
  • Main Street between Stowell Road and the Medford city line

Vehicle and pedestrian detours will be necessary during work hours. Steel road plates will be used to safely secure the area at the end of each day. 

A recent notice promoted jack and bore activity at the Wedgemere MBTA Station as a continuous operation (24-hours a day) beginning on June 19 or June 20 lasting 2-3 days. This work is now delayed until further notice. A new notice will be mailed to abutting property owners when the new dates for this work are confirmed. 

Crews are currently conducting site preparation activities near the Wedgemere MBTA Station and the Aberjona River. Proper signage will be in place to direct pedestrians and commuters, when necessary. Parking restrictions will be clearly posted in advance. 

Construction hours in Winchester are 7 a.m. to 5 p.m., Monday through Friday.

 

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. Door-to-door outreach efforts for the project have been temporarily suspended because of COVID-19 precautions. This effort 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.