Greater Cambridge Energy Project

Project Overview

We propose to construct a new underground substation in Kendall Square, Cambridge, Massachusetts, along with five underground duct banks housing eight new 115-kilovolt (kV) underground transmission lines interconnecting to existing substations in the surrounding area. 

These upgrades will bolster system reliability, meet growing energy needs and further facilitate access to clean energy resources for our customers.

Energy Facilities Siting Board (EFSB)

To construct and operate the five new 115-kV transmission lines, Eversource must file a petition with the Massachusetts Energy Facilities Siting Board (EFSB) for approval. The petition filing is part of the regulatory review process, as defined by Massachusetts state statutes.

Eversource submitted a siting petition to the EFSB on March 10, 2022. The EFSB’s docket is available for viewing in the organization’s file room.

The EFSB held a Public Comment Open Hearing on Tuesday, June 28, 2022 at 6:00 pm remotely using Zoom videoconferencing, where individuals and groups affected by the initial petition had the opportunity to voice feedback to the Siting Board.

Public Hearing Notifications

Public Comment Hearing Presentations

Project Location 

Preferred routes:*

gcep-preferred-legend

*Route alignments are approximate and shown for illustrative purposes only.



Alternate routes:*

gcep-alt-legend

*Route alignments are approximate and shown for illustrative purposes only.


The new substation will be located between Broadway and Binney Street and will be integrated into Boston Properties’ redevelopment plans for the Kendall Center Blue Garage.

Above the underground substation will be an open and accessible public space.

The project also requires five underground duct banks housing eight new 115-kilovolt (kV) transmission lines, interconnecting the new substation to an existing substation in the Allston-Brighton neighborhood of Boston, existing substations at Kendall, as well as Putnam Avenue in Cambridge and the existing substation at Prospect Street in Somerville. 

Community Outreach

We're committed to continuing our collaborative working partnership with each local community, municipal leaders and other interested stakeholders to provide information on the project, gather feedback and answer any questions or concerns.

Virtual public open houses and in-person pop-up events were held in each host community during the fall of 2021 to solicit feedback from a diverse cross-section of the neighborhoods the project will traverse.

Anticipated Schedule

  • Public Open Houses: Open houses were held in October, 2021. Materials are available below in Additional Resources.
  • File Siting Petition with the Energy Facilities Siting Board (EFSB): Project filed March 10, 2022
  • EFSB Public Hearing: The EFSB public comment hearing was held on June 28th, 2022
  • Tentative Decision from the EFSB: Late 2023
  • Final Decision from the EFSB: Early 2024
  • Pending EFSB approval, Pre-Construction Open Houses: Early 2024
  • Start of construction: 2024
  • Estimated in-service dates: Late 2028 through 2029

*Dates subject to change

Additional Information can be found on the the Siting Board’s website.

Project Contact Information 

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

For questions or more information about the project, please contact us at 1-800-793-2202 or ProjectInfo@eversource.com.