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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 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, 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 August 3rd.

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.

 
Construction activity is ongoing within public streets at the following locations:
  • Winthrop Street between Robinson Road and Playstead Road
    • Crews recently returned to this area to excavate trench and install pipe
    • Work is expected to continue at this location through August
  • Winthrop Street between Wildwood Road and Brooks Street
    • Crews conduct test pits (areas where we open the pavement to locate existing underground utilities) during the week of August 3rd
  • South Street between Touro Avenue and Main Street
    • Work is expected to continue at this location through August
  • Mystic Avenue between Billings Avenue and Crescent Street
    • Work is expected to continue at this location through August

Steel road plates will be used to safely secure the area at the end of the day. Additional mitigation measures are being employed at all work zones to mitigate the noise generated by vehicles travelling over the steel plates.

Crews have completed paving a portion of Winthrop Street between Wildwood Road and Smith Lane. Now that paving is complete, steel plates have been removed. Eversource thanks residents near this work zone for their patience.

Steel plates will remain in place on Winthrop Street between Wildwood Road and Brooks Street while crews conduct test pits (areas where we open the pavement to locate existing underground utilities).

Vehicle and pedestrian detours will be necessary during work hours.

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. 

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

Parking restrictions will be necessary during work hours and will be clearly posted in advance. 

   
 

No additional construction activity within the public right-of-way is anticipated until the third 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 Parker Road
    • Work at this location is expected to continue through August
  • Wildwood Street between Ivy Circle and Fletcher Street
  • Fletcher Street between Wildwood Street and Calumet Road
    • Work is expected to begin at this location in early August

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 19th or June 20th and 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 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.