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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):

  • Projected in-service date: May 2022

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.

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

In-street construction will occur in the Spring of 2021.

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

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

On Winthrop Street, an excavation crew will install duct bank between Osborn Road and Smith Lane during daytime work hours. Please note that the traffic management plan in place necessitates lane restrictions around the active work site during work hours. Local access will be maintained. Work is expected to continue at this location through April.

Daytime construction activity on Winthrop Street will occur between 7 a.m. and 4 p.m., Monday through Friday.

Steel road plates will be used to safely secure the area at the end of each work shift.

Pedestrian detours and parking restrictions may be necessary during certain phases of the work. Parking restrictions will be clearly posted in advance.

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 Somerville from the Mystic to Woburn Line Project this week:

On Mystic Avenue, an excavation crew will install duct bank between Middlesex Road and Alfred Lombardi Street during daytime work hours. Please note that the traffic management plan in place necessitates lane restrictions around the active work site during work hours. Local access will be maintained. Work is expected to continue at this location for several weeks.

Daytime construction activity on Mystic Avenue will occur between 7 a.m. and 5 p.m., Monday through Friday.

Steel road plates will be used to safely secure the area at the end of each work shift.

Pedestrian detours and parking restrictions may be necessary during certain phases of the work. Parking restrictions will be clearly posted in advance.

As construction continues, please note that the Somerville 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 Winchester from the Mystic to Woburn Line Project this week: 

Current construction activities include survey work and field tests to identify existing utilities within the public street and sidewalks along Bacon Street. This is to prepare for upcoming duct bank installation. 

On Main Street, two excavation crews will install duct bank between the Medford town line and Symmes Rotary during daytime work hours. Please note that the traffic management plan in place necessitates lane restrictions around the active work site during work hours.  Local access will be maintained. Work is expected to continue at this location for several more weeks.

On Fletcher Street, an excavation crew will install duct bank between Wildwood Street and Church Street during daytime work hours. Please note that the traffic management plan in place necessitates a detour utilizing Wildwood Street and Church Street around the active work site during work hours. Local access will be maintained. Work is expected to continue at this location through May.

Daytime construction activity on Main Street and Fletcher Street will occur between 7 a.m. and 4 p.m., Monday through Friday.

Steel road plates will be used to safely secure the area at the end of each work shift.

Pedestrian detours and parking restrictions may be necessary during certain phases of the work. Parking restrictions will be clearly posted in advance.

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 related to the Mystic to Woburn Line Project 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). Full 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.