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Sudbury to Hudson Transmission Reliability Project
Why Are We Doing This Project?
This new,115-kilovolt (kV) transmission line is one of a group of projects designed to improve the reliability of the electric system serving the Greater Boston area, both today and in the future.
Where Is This Work Being Done?
The new line is being constructed between the Eversource substation in Sudbury, and the Hudson Light and Power substation in Hudson. Sign up to receive routine email updates about the project.
The approved route includes 7.6 miles of underground line within an existing, inactive Massachusetts Bay Transportation Authority (MBTA) railroad corridor, passing through Sudbury, Marlborough, Stow and Hudson. The remaining 1.4 miles of line is being built under streets in Hudson.
Eversource is working closely with the Massachusetts Department of Conservation and Recreation (DCR) to co-locate compatible uses within the existing, inactive MBTA corridor. Eversource will conduct the civil work and bridge replacement to prepare the site, install the new transmission line and leave a compacted gravel sub-base to support the Massachusetts Central Rail Trail (MCRT). After the Eversource project is complete, DCR will pave the trail, install safe road crossings and complete final restoration of this publicly accessible shared-use path.
* View the interactive project map
Traffic Management and Rail Trail Access
Working in consultation with town officials, we developed Traffic Management Plans (TMPs) for construction of the 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. Due to size, TMPs may take extra time to open/download.
We, in partnership with local officials, developed a plan detailing access and time of year restrictions to rail trails, between White Pond Road and Dutton Road, that intersect with the MBTA corridor.
During construction (including after hours and on weekends), we ask people in the area to avoid walking along and crossing the inactive MBTA corridor. Two crossings of the MBTA corridor will be put in place from May 1 through July 31 during the project construction: one at the Town Line and one at the Marsh to Desert Trail. There may be potential for additional periods of time for these crossings to be open and notice will be provided.
When Is The Work Being Done?
- Filed Environmental Notification Form for review under the Massachusetts Environmental Policy Act (MEPA): May 15, 2017
- Received Certificate of the Secretary of Energy and Environmental Affairs on the Final Environmental Impact Report (FEIR): September 14, 2018
- Filed siting petition with the EFSB: April 20, 2017
- EFSB public hearings: May 25 and June 1, 2017
- Received EFSB approval: December 17, 2019
- Start of construction: Q4 2022
- Projected in-service date: First quarter 2025
About this project
- Route length: 9 miles
- Line voltage: 115,000-volt (115-kV) transmission line
- Siting review: Massachusetts Energy Facilities Siting Board (EFSB)
Construction Updates
We're committed to keeping neighbors, businesses and community members informed on project activities during construction.
You can sign up to receive email updates like the ones below:
This work will not interrupt your electrical service.
Sudbury
Week of October 2
From White Pond Road to the Town Line, two crews are installing duct bank between two recently placed manholes (MH13 and MH15) south of Bruen Road.
At Bridge 128 between the Town Line and Dutton Road, crews are continuing to work on the bridge rebuild.
From Dutton Road to Peakham Road, crews are installing duct bank between MH18 and MH19, south of Amanda Road.
On Horse Pond Road, crews will be installing duct bank across the road, where it intersects with the MBTA corridor. Starting next week, they will be moving to Union Ave and installing duct bank across the road.
At Bridge 127 between Boston Post Road and Landham Road, crews are stripping, backfilling, and pouring abutment walls.
From the Sudbury Substation to Bridge 127, starting next week, crews will begin installing duct bank between MH26 and MH27.
Between Horse Pond Road and Dutton Road, invasive species removal is on-going, and is expected to continue over the next few weeks.
View the project map for details on the locations of these crews in the inactive MBTA corridor.
Approved work hours are 7 a.m. to 6 p.m., Monday to Friday but crews are working from 7 a.m. to 3:30 p.m. Occasional work may extend beyond the approved hours, due to unforeseen circumstances, based on approval from local officials.
As construction
continues, the Sudbury 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 use caution when approaching
active work areas to minimize risks to personal safety and to avoid interfering with construction. Final restoration activities will occur when the project is complete.
Hudson
Week of October 2
On Forest Avenue, between Richardson Street and Main Street, two crews are excavating and installing duct bank from 7 a.m. to 5 p.m., From 7 a.m. to 9 a.m. Forest Ave will have west bound traffic open to Forest Avenue Elementary School. From 9 a.m. to 5 p.m. Forest Avenue in this zone will be closed and only be open to local traffic and other vehicles are asked to follow detour signage during work hours. Eastbound traffic will detour up Woodrow Street to Main Street. Westbound traffic will detour down Main Street to Villa De Porto Boulevard and will detour left up Grove Street to get back onto Forest Ave.
At bridge 130 between Chestnut and Main Street, one crew will be removing the existing dam and bridge.
On Chestnut Street, north of Lewis Street, crews are installing precast arches and wing walls. This portion of Chestnut Street is closed until November and is only open to local access up to the MBTA crossing at Chestnut Street/Marlboro Road. Road restoration will begin in the coming weeks.
View the project map for additional details on the locations of work crews.
Approved work hours are 7 a.m. to 6 p.m., Monday to Friday but crews are working from 7 a.m. to 3:30 p.m. On Forest Avenue in Hudson, between Main Street and Marlboro Road, crews are working between 9 a.m. and 2 p.m. Occasional work may extend beyond
the approved hours, due to unforeseen circumstances, based on approval from local officials.
As construction continues, the Hudson Police Department may modify the traffic management plans based on their judgment 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. Final restoration activities will occur when the project is complete.
Stow
Week of October 2
On Chestnut Street, north of Lewis Street, crews are working to complete a section of duct bank between two manholes, that have been installed on either side of the Chestnut Street bridge.
Chestnut Street will be excavated on either side of the bridge with a portion of the road being removed entirely. For this work, this portion of Chestnut Street will be closed for an extended period, lasting up to four months. Chestnut Street will be closed to through traffic and only be open to local access up to the MBTA crossing at Chestnut Street/Marlboro Road.
Marlborough
Week of October 2
There will be no work in Marlborough.
Siting and Environmental Notification Form Review
The EFSB Petition Filing is part of the siting regulatory review process for an electric transmission line project. On December 17, 2019, Eversource received approval from the EFSB to construct the Sudbury to Hudson Reliability Project. The Massachusetts Supreme Judicial Court upheld the decision on June 25, 2021.
The EFSB's docket is available for viewing in the organization’s file room. Eversource’s filing is docket number EFSB17-02.
On May 15, 2017, Eversource submitted an Environmental Notification Form (ENF) to the MEPA Office for review. On June 12, 2017, the MEPA Office held a public site tour and scoping session for the project.
On September 14, 2018, Eversource received the Certificate of the Secretary of Energy and Environmental Affairs on the Final Environmental Impact Report (FEIR) for the Sudbury - Hudson Transmission Reliability Project.
For more information on the MEPA process, please visit their website.
Community Outreach
We will maintain an active field outreach presence during construction in case members of the public have questions.
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.