National Grid Upgrading Transmission Infrastructure in Southborough Through Project D-156
National Grid is refurbishing the electricity transmission poles in Southborough as part of Project D-156. The project entails replacing 42 aging wooden poles with weathered steel models to enhance reliability, with possible height increases of 5 to 20 feet. Work began in December 2025 and is expected to continue until January 2027, primarily on weekdays with some Saturday activity. Vegetation management and site preparations are also included in the project.

National Grid's Project D-156 involves refurbishing 42 electricity transmission poles in Southborough. The utility is replacing aging wooden poles with weathered steel poles to improve system reliability.
Some poles may be relocated or have their height increased by 5 to 20 feet. The work commenced in December 2025 and is scheduled to continue until January 2027, with operations primarily from 7:00 am to 5:00 pm on weekdays and some Saturdays.
The project includes vegetation management, site preparation, and the movement of large construction vehicles. National Grid has provided a Project Hotline for public inquiries.




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