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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:

On South Street, a trench excavation crew will continue excavation activity at the South Street and Walnut Street intersection.  To make room for this challenging work, South Street and certain neighboring streets will remain closed to non-local traffic during work hours.  Please follow the direction of posted signage indicating speed limits and detours during work hours.  Work is expected to continue at this location through November.

On Winthrop Street between Winford Way and Playstead Road, crews recently completed excavation and pipe installation and are currently backfilling and restoring sections of the roadway where the trench was excavated.  Please note that a one-way alternating traffic pattern will be in place around this work site.  Work is expected to continue at this location through October.  

Also on Winthrop Street, a trench excavation crew will continue trench excavation activity between Robinson Road and the Winchester Town Line. Please note that a one-way alternating traffic pattern will be in place around this work site.  Work is expected to continue at this location through November.  

On Mystic Avenue, a restoration crew will be working between Reardon Road and Union Street.  Please note that an alternate traffic pattern in place around this work site.  Work is expected to continue at this location through October. 

Daytime construction activity at each of the above 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.

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

As construction continues, please note that the Medford Police Department may modify the traffic management plans based on their judgement and expertise.  This includes street closures and traffic detours to ensure public safety.  Please exercise caution when approaching active work areas to minimize risks to personal safety, and to avoid interfering with construction.

 

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

On Mystic Avenue, a trench excavation crew will soon continue excavation activity at the Alfred Lombardi Street and Middlesex Avenue intersection.  Work is expected to continue at this location through November.

Construction activity at this location will occur between 7 a.m. and 5 p.m., Monday through Friday.

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.

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

On Woodside Road, a paving crew will continue backfilling and paving activities between Norfolk Road and Winter Pond.  Work is expected to continue at this location through October.

On Fletcher Street, a trench excavation crew will continue excavation activity at the Wildwood Street and Fletcher Street intersection.  Work is expected to continue at this location through November.

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

Construction on Woodside Road, Wildwood Street, and Fletcher Street will not begin until 8:30 a.m. on Mondays, Tuesdays, Thursdays, and Fridays.  On Wednesdays, work will begin at 7:00 a.m.

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. 

As construction continues, please note that the Winchester Police Department may modify the traffic management plans based on their judgement and expertise.  This includes street closures and traffic detours to ensure public safety.  Please exercise caution when approaching active work areas to minimize risks to personal safety and to avoid interfering with construction.

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.