D-156
About the Project
The D-156 Refurbishment Project will improve about 5.5 miles of overhead 115 kilovolt transmission line located within an existing utility right-of-way.
The project runs through Southborough, from National Grid’s substation on Northborough Road to an area south of Nichols Street. The work will replace older equipment, improve electric reliability, and make the system stronger for the future.
As part of the project, crews will replace 37 wooden structures and 5 steel structures with new steel structures designed to last longer. Some structures may be moved slightly or made taller to meet current safety, engineering, and environmental standards.
Project Benefits
Replaces older transmission equipment to help the system work well for many years.
Improves electric reliability for customers in the region.
Makes the transmission system stronger to support future energy needs.
Modern steel structures are designed to better handle weather and environmental conditions.
Upgrades are completed within the existing utility right of way, reducing the need for new land use.
Project Resources
- Dec - Construction Schedule Begins
- Jan - Construction Schedule Complete
Frequently Asked Questions
8 FAQsConstruction is planned to begin in December 2025 and is expected to be finished by January 2027. Early work in 2025 will include tree clearing and site preparation.
The project will take place in Southborough, Massachusetts, within an existing utility right-of-way. Work will run from National Grid’s substation on Northborough Road to an area south of Nichols Street. Along the route, crews will cross several local roads, including:
Northborough Road
Main Street
Lynbrook Road
Deerfoot Road
Parkerville Road
Middle Road
Cordaville Road
Latisquama Road
White Bagley Road
Boston Road
Nichols Street
This project will improve the safety, strength, and reliability of the electric system in the area. It will replace older equipment, add new communication lines, and help make sure the system can support future energy needs.
No. There are no planned power outages as part of this project.
You may see more trucks and equipment near the work area. Some roads may have temporary lane closures or police details at certain times to help keep everyone safe.
Most trails will stay open while work is happening nearby. If a trail needs to be closed for safety, signs will be posted to let the public know.
You may see activities such as:
- Tree clearing and site preparation
- Delivery and use of heavy equipment
- Installation of new steel transmission structures
- Stringing of new transmission wires
- Use of existing and improved access roads
National Grid is committed to keeping the community informed. The project team will share updates, work with local officials, and hold community meetings as needed. Residents can also call the project hotline or email the project team with questions.
Contact Us
About the Project
The D-156 Refurbishment Project will improve about 5.5 miles of overhead 115 kilovolt transmission line located within an existing utility right-of-way.
The project runs through Southborough, from National Grid’s substation on Northborough Road to an area south of Nichols Street. The work will replace older equipment, improve electric reliability, and make the system stronger for the future.
As part of the project, crews will replace 37 wooden structures and 5 steel structures with new steel structures designed to last longer. Some structures may be moved slightly or made taller to meet current safety, engineering, and environmental standards.
Project Benefits
Replaces older transmission equipment to help the system work well for many years.
Improves electric reliability for customers in the region.
Makes the transmission system stronger to support future energy needs.
Modern steel structures are designed to better handle weather and environmental conditions.
Upgrades are completed within the existing utility right of way, reducing the need for new land use.
Project Resources
News and Updates
Timeline
Frequently Asked Questions
8 FAQsConstruction is planned to begin in December 2025 and is expected to be finished by January 2027. Early work in 2025 will include tree clearing and site preparation.
The project will take place in Southborough, Massachusetts, within an existing utility right-of-way. Work will run from National Grid’s substation on Northborough Road to an area south of Nichols Street. Along the route, crews will cross several local roads, including:
Northborough Road
Main Street
Lynbrook Road
Deerfoot Road
Parkerville Road
Middle Road
Cordaville Road
Latisquama Road
White Bagley Road
Boston Road
Nichols Street
This project will improve the safety, strength, and reliability of the electric system in the area. It will replace older equipment, add new communication lines, and help make sure the system can support future energy needs.
No. There are no planned power outages as part of this project.
You may see more trucks and equipment near the work area. Some roads may have temporary lane closures or police details at certain times to help keep everyone safe.
Most trails will stay open while work is happening nearby. If a trail needs to be closed for safety, signs will be posted to let the public know.
You may see activities such as:
- Tree clearing and site preparation
- Delivery and use of heavy equipment
- Installation of new steel transmission structures
- Stringing of new transmission wires
- Use of existing and improved access roads
National Grid is committed to keeping the community informed. The project team will share updates, work with local officials, and hold community meetings as needed. Residents can also call the project hotline or email the project team with questions.