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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 this week:

Near Mystic Avenue but off the street, crews are preparing for a trenchless crossing of the MBTA railway during daytime work hours.

On Alford Street and within Ryan Park, an excavation crew will install duct bank between Ryan Park and Main 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 be continue at this location for several weeks.

Daytime construction activity in Boston will occur between 7:00 a.m. and 4:00 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 Boston 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.  

Once work in your area is complete, crews will temporarily pave sections of the road. Final restoration activities will occur when the project is complete in 2022.

Owners of property along this project route are encouraged to direct questions and concerns to the Eversource project hotline at 1-800-793-2202 or send an email to ProjectInfo@eversource.com. A field outreach representative will respond to all inquiries via phone or email.

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 this week: 

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

On Winthrop Street, an excavation crew will install duct bank between Brooks Street and Victory Park 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 be continue at this location for several weeks.

Also on Winthrop Street, an excavation crew will install duct bank between Victory Park and Lawrence Road 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.

On Mystic Avenue and Main Street, an excavation crew will install duct bank between Emerson Street and Union Street during nighttime 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 be continue at this location for several weeks.

Starting soon, on Winthrop Street, an excavation crew will install duct bank between Mystic Valley parkway and Winthrop Square 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 Winthrop Street will occur between 7:00 a.m. and 4:00 p.m., Monday through Friday.

Nighttime construction activity on Mystic Avenue and Main Street will occur between 7:00 p.m. and 5:00 a.m., Monday through Thursday.

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.

Once work in your area is complete, crews will temporarily pave sections of the road. Final restoration activities will occur when the project is complete in 2022.

Owners of property along this project route are encouraged to direct questions and concerns to the Eversource project hotline at 1-800-793-2202 or send an email to ProjectInfo@eversource.com. A field outreach representative will respond to all inquiries via phone or email.

Here’s what to expect in Somerville this week: 

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

On Mystic Avenue, an excavation crew will continue to 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 one week. Work crews will return to completes other sections of duct bank on Mystic Avenue.

Daytime construction activity on Mystic Avenue 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 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 this week:  

On Main Street, an excavation crew will install duct bank between South Gateway and Stowell Road 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 2 more weeks.

Starting soon on Bacon Street, an excavation crew will install duct bank between Symmes Rotary and Winslow Road 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 for 4 weeks. 

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

At Wedgemere Station, crews are preparing for a trenchless crossing of the MBTA railway during daytime work hours.  Starting September 20, work activities will run 24 hours for five days.  Parking restriction will be in place within the Wedgemere Station parking lot to accommodate this challenging work.  Work is expected to continue at this location for several weeks.

Also at Wedgemere Station, an excavation crew will install duct bank across the Wedgemere Parking lot during daytime work hours. Please note that the traffic management plan in place necessitates utilization of both entrances during work hours. Signage will be posted clearly in advance. Local access will be maintained.  Work is expected to continue at this location for several weeks.

Daytime construction activity on Main Street, Fletcher Street and Bacon 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.

Once work in your area is complete, crews will temporarily pave sections of the road. Final restoration activities will occur when the project is complete in 2022.

Owners of property along this project route are encouraged to direct questions and concerns to the Eversource project hotline at 1-800-793-2202 or send an email to ProjectInfo@eversource.com. A field outreach representative will respond to all inquiries via phone or email.

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.