Eversource has received tentative approval for its $1.5 billion Greater Cambridge Energy Program, marking a major development in electric transmission and distribution infrastructure. This project, anchored by the first underground electrical substation in Massachusetts, aims to meet the growing electricity needs of Cambridge, Somerville, and the Brighton area of Boston.

The new substation, to be located at the former Blue Garage parking site in Kendall Square, Cambridge, is a pioneering endeavor. Developed in collaboration with the City of Cambridge, the Cambridge Redevelopment Authority, Boston Properties, Inc., and community stakeholders, the substation will be a key component in enhancing grid resilience and sustainability in the greater Cambridge area.

Central to the project are the advanced transformers that will be housed in the underground substation. These transformers are essential for converting high-voltage electricity from the grid into lower voltages suitable for distribution, ensuring reliable and efficient power delivery. This will support new development activities and the electrification of buildings and transportation, aligning with the area's net zero decarbonization goals.

The project also includes the construction of eight new 115-kilovolt transmission lines in five underground duct banks, extending 8.3 miles and linking the new substation to existing substations in Somerville, East Cambridge, Cambridgeport (Putnam), and Brighton. This network of transmission lines will be primarily located below public roadways to minimize disruption and environmental impact.

Eversource has conducted extensive community outreach throughout the planning process and will continue to engage with local residents, municipalities, businesses, and universities as the project progresses. The substation will feature a new public green space above it, providing additional community benefits, particularly in areas with Environmental Justice populations.

The Massachusetts Energy Facilities Siting Board will meet on June 27, 2024, to consider and vote on the Tentative Decision, which recommends approval with conditions to mitigate environmental and community impacts. If approved, construction is expected to begin in 2025 and conclude in 2029.

Source: Mass.gov