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Mystic to Woburn Line Project

Why Are We Doing This Project?

This project will improve reliability and address the growing need for electricity in the area.

Where Is This Work Being Done?

This project includes a new 115-kilovolt (kV) underground transmission line that will connect Eversource’s Mystic Substation in Everett and Eversource’s Woburn Substation.

The line will extend approximately 8 miles between two existing substations, passing 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_mystic_woburn_project

About This Project

  • Route length: Approximately 8 miles
  • Line voltage: 115,000-volt (345-kilovolt [kV]) underground transmission line
  • Siting review by: EFSB

Traffic Management Plans

Working in consultation with town officials, we developed Traffic Management Plans (TMPs) for the construction of the Mystic to Woburn Line Project.

The TMPs include conditions specific to routing by the Energy Facilities Siting Board (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.

When is the Work Being Done?

  • Start of construction: July 2017
  • Projected in-service date: 2023

*subject to change

Construction Updates

We're committed to keeping neighbors, businesses and community members informed on project activities during construction.

Construction began in 2022 and work is not expected to interrupt electric service to homes or businesses.

Boston | Charlestown

Week of May 29

There will be no work on Monday, May 29, in observance of Memorial Day.

Near Mystic Avenue but off the street, crews are continuing a crossing of the MBTA railway. Construction activity will occur 24 hours per day.

Across the Sullivan Square traffic circle, crews will look to excavate and install duct bank between Maffa Way and Alford Street during nighttime work hours. Lane restrictions will be necessary.

Typical daytime construction activity in Boston will occur between 7 a.m. and 5 p.m., Monday through Friday.

Nighttime construction activity in Boston will occur between 8 p.m. and 4 a.m., Monday through Friday.

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

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.

Everett

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.

Medford

Week of May 29

There will be no work on Monday, May 29, in observance of Memorial Day.

To stay informed about construction activities in Medford, sign up for weekly email updates.

Pavement Markings:

Crews will soon look to complete pavement markings on recently paved areas of roadway in Medford.

Wheel-Chair Ramps:

McCourt crews will be restoring the recently installed wheel-chair ramp areas with loam and seed.

Roadway Milling:

Roadway milling is complete and crews will complete casting adjustments on Mystic Avenue at side street between Swan Street and Hancock Street.

Roadway Paving:

On Mystic Avenue, between Crescent Street and the Somerville line, crews will continue final roadway paving during nighttime work hours, weather dependent.

Construction hours:

Wheel-chair Ramps: 9 a.m. to 3 p.m.
Roadway Milling: 9 a.m. to 3 p.m.
Adjusting Castings: 9 a.m. to 3 p.m.
Roadway Paving: 7:30 p.m. to 5 a.m.
Pavement Markings: 7:30 p.m. to 5 a.m.

As project activities continue, 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.

Somerville

Week of May 29

There will be no work on Monday, May 29, in observance of Memorial Day.

As early as May 30, crews will return to Mystic Avenue, between the Medford city line and Charlestown city line, to complete final restoration. Restoration activities include sidewalk restoration, roadway milling, casting adjustments, roadway paving, and pavement markings.

Crews have completed cable pulling activities at manhole locations on Mystic Avenue and will return to complete cable splicing. 

Winchester

Week of May 29

There will be no work on Monday, May 29, in observance of Memorial Day.

On Pond Street within the Eversource substation, crews will be cable splicing which requires 24hr work shifts for up to one week. Splicing involves equipment such as a splicing van, an air-conditioning unit, a de-watering pump, and a generator at the manhole location.

As early as June 10, on Main Street, between Sanborn Street and Stowell Road, crews will begin cable splicing which requires 24-hour work shifts for up to one week. Splicing involves equipment such as a splicing van, an air-conditioning unit, a de-watering pump and a generator at the manhole location.

Crews completed roadway milling, casting adjustments, and final paving on Bacon Street and Main Street between Mystic Valley Parkway and the Medford town line. In the coming weeks, crews will return to complete roadway striping during nighttime work hours.

As project activities continue, 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.

Woburn

Woburn Substation

All construction activities remaining on the Mystic to Woburn Line Project are within and around the substation fence. No substation expansion is planned.

Energy Facilities Siting Board

The Massachusetts ESFB Petition Filing is part of the regulatory review process, as defined by Massachusetts state statutes.

On March 9, 2017, we received approval from the EFSB to construct the project. See EFSB 15-03 Final Decision.

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.

Have Questions?

Keeping the lines of communication open is an important part of our work in your community.

For more information about this project, please call the project information hotline at 1-833-836-0302 or email ProjectInfoMA@eversource.com.