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Cape Cod Solution Phase II

Why Are We Doing This Project?

This project is the second phase of the Cape Cod Solution Program, a group of projects designed to improve the reliability of the electric system serving the Southeastern Massachusetts and Greater Cape Cod areas both today and in the future as more clean energy resources like offshore wind are connected to the grid.

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Where Is This Work Being Done?

The second phase of this program will increase operating voltage of a new transmission line from 115-kV to 345-kV, which is necessary for an offshore wind generator to be able to connect to our system. This change in operation will not result in any noticeable changes to the transmission line along the 13-mile project route.

In order to support the increase in voltage, additional facilities will need to be constructed at each end of the new line at the Bourne Switching Station, located on Joint Base Cape Cod, and the West Barnstable Station.


A new 345-kV station is planned to be built in Bourne adjacent to the existing station. All work will be within Joint Base Cape Cod.


A 345-kV switchyard is planned to be built on the Eversource-owned site of the existing West Barnstable Station on Oak Street. 

When Is The Work Being Done?

  • Projected DPU approval: Fall 2024*
  • Start of construction (stations): Spring 2025*
  • Start of construction (interconnection line): Spring 2025*
  • Projected in-service date: Fall 2027*

*Subject to change, pending necessary approvals

About this project

  • Route length: 13 miles
  • Line voltage: 345,000-volt (345-kV) transmission line
  • Siting review by: Energy Facilities Siting Board (EFSB)/ Department of Public Utilities (DPU)
  • Public open house: July 31,2023
  • EFSB Approval: To be updated

Community Outreach

We will continue to engage with town officials, residents, businesses, community groups and other stakeholders through municipal briefings, door-to-door outreach, site visits, and additional meetings as needed – answering questions and listening to concerns about the project. We will also maintain an active field presence during construction.

Please read our Cape Cod Solution Phase II frequently asked questions and construction outreach plan for answers to common questions and concerns we've received during our outreach efforts. 

Have Questions?

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

For more information about this project, please call the project information hotline at 1-833-836-0302 or email