Why Are We Doing This Project?

As part of our ongoing commitment to deliver reliable energy and superior service to our customers, we are proposing to replace existing 115-kilovolt (kV) high pressure fluid-filled (HPFF) underground transmission lines with new 115-kV cross-linked polyethylene (XLPE) transmission lines. 

The existing 1322 line (see Figure 1) was installed in 1955 and is past the useful life expectancy. Replacing the existing HPFF with XLPE will modernize the existing transmission system and increase reliability.

Where Is This Work Being Done?

The proposed project is part of a larger program we are conducting throughout our service territory in Connecticut and Massachusetts related to underground cable modernization. This program is designed to modernize and increase the capacity of the existing underground transmission cable systems by replacing existing fluid-filled cable with cross-linked polyethylene cable.

This Springfield area project includes the replacement of 2.8 miles of 115-kV HPFF underground electric transmission lines with XLPE underground cable connecting the existing Breckwood and East Springfield substations.

See Figure 2 for a graphical depiction of all initially considered project routes. A thorough review of this list is underway and will determine which routes remain viable options. Local municipality and neighborhood groups are involved and providing feedback throughout the review process. Updates will be posted to this website as the review proceeds.

About this project

• Route length: 2.8 miles
• Line voltage: 115 kilovolts (kV)
• Siting review by: Energy Facilities Siting Board (EFSB)

Siting Review

This project requires a Section 69J Petition to the Energy Facilities Siting Board. We intend to submit its permit to the EFSB in the first quarter of 2024. Environmental permits will also be required from local, state and federal agencies. 

Community Outreach

We will continue to communicate with elected and local officials, residents, and businesses as we conduct these maintenance and reliability upgrades. We are committed to providing meaningful opportunities to participate in the project development process, and to incorporate local feedback into the project’s development as feasible.

Below is a summary of past outreach activities.

• Open house event at Springfield Central High School Cafeteria (March 27, 2024)