Project Information
On November 20, 2025, NSTAR Electric Company d/b/a Eversource Energy
The Site consists of two Company-owned adjacent parcels of land numbered 228 and 280Sam Turner Road that together comprise approximately 12.7 acres. The Switching Station is located on a portion of the 228 Sam Turner Road parcel. The fenced yard of the Switching Station
is approximately 0.6 acres in size. Outside of the Switching Station fenced yard, the Site is comprised of forested areas and maintained transmission corridor.
The fenced yard of the new Substation will be approximately 2.6 acres in size and will straddle both parcels. In designing the Substation, the Company considered the equipment that must be installed, the working space needed around each piece of equipment, and the construction sequence. The size of the Substation yard is required to accommodate the safe installation of the new transmission and distribution equipment, while allowing for future operations and maintenance to be conducted safely. The Switching Station will be dismantled prior to constructing the Substation.
The Company will construct temporary switching facilities (“Temporary Switching Facilities”) on the Site to avoid interruption of switching service during construction. The Temporary Switching Facilities will include a single 115 kV circuit breaker on the Site slightly north of and adjacent to the existing Switching Station. The four 115 kV overhead transmission lines that connect to the Switching Station will be rerouted to the Temporary Switching Facilities, which will include transmission line and breaker failure relaying.
The following four temporary transmission structures will be constructed to reroute Lines #107 and #136 to the Temporary Switching Facilities: (1) on Line #107, three temporary structures with an average height of 83 feet; and (2) on Line #136, one temporary structure with an average height of 70 feet. The Temporary Switching Facilities will be dismantled, and temporary structures will be removed when the Substation begins operating.
Project Filing wIth EFSB
All documents related filed in relation to a proceeding are posted to the DPU Fileroom. The Fileroom page for a proceeding represents the official record for that proceeding. The public can access the Fileroom page for this proceeding at the following link:
Accomodation & Language Services Requests
Reasonable accommodations for people with disabilities (e.g., Braille, large print, electronic files, audio format) are available upon request.
To request an accommodation, please contact:
Melixza Esenyie
Non-Discrimination Coordinator and Director of Diversity, Equity, and Inclusion
Massachusetts Executive Office of Energy and Environmental Affairs
Human Resources, 9th Floor
100 Cambridge Street, Boston, MA 02114
eeadiversity@mass.gov, 617-626-1282
In your communication, state the accommodations you need and why you need them. Provide contact information in case the Coordinator needs more information. Provide your request as soon as possible. The Coordinator will consider but may not be able to fulfill late requests.
Language interpretation services are also available upon request to Yonathan Mengesha at (617) 305-3544 or yonathan.mengesha@mass.gov
Include in your request the language required and your contact information. To assist us in accommodating your request, please submit it as soon as possible.
Non-Discrimination Notice
The Siting Board does not discriminate on the basis of race, color, national origin, disability, age, sex, income, ethnicity, class, disability, religious creed or belief, gender identity, sexual orientation, genetic information, English language proficiency, or ancestry in administration of its programs or activities.
See the Siting Board’s Non-Discrimination Notice by clicking the available link.
If you have any questions about this notice or any of the Siting Board’s non-discrimination programs, policies, or procedures, or believe the Siting Board has discriminated against you, you may contact Melixza Esenyie (see above for contact information) for more information.
Useful Information
EFSB Siting and Permitting Reform Updates
For more detailed information on the Siting process: Energy Facilities Siting Board Handbook (updated 2019) | Guía para fijar la ubicación de instalaciones energéticas (2019)
Contact
Department of Public Utilities Siting Division
Online
Email Email Department of Public Utilities Siting Division atsitingboard.filing@mass.gov
Phone
EFSB/DPU Siting Division Call Department of Public Utilities Siting Division, EFSB/DPU Siting Division at(617) 305-3525
DPU Main Call Department of Public Utilities Siting Division, DPU Main at(617) 305-3500
Address
Department of Public Utilities
1 South Station, 3rd floor, Boston, MA 02110