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Garvins to Deerfield (G146) Structure Replacement Project

Why Are We Doing This Project?

Recent inspections and engineering analysis of the G146 transmission lines revealed that many of the structures are in poor condition due to their age, woodpecker damage, insect damage, pole rot, and delamination.

This structure replacement project will replace or remove 176 of the 186 structures along the G146 transmission line (10 existing steel structures will remain). These structures are between 18-20 years old and of a laminate wood monopole design; two will be removed and the remainder will be replaced with new weathered steel monopole structures. Improvements are part of our ongoing investments to deliver reliable energy to our customers and communities.

Where Is The Work Being Done?

This work is taking place within the existing right-of-way (power line corridor). The G146 laminate wood structures were installed in 2003 and 2005. 

The G146 line is a 115kV transmission line that is 18.2 miles long and starts at our Deerfield Substation in Deerfield and passes through Deerfield, Allenstown, Pembroke, Concord, and into our Garvins Substation in Bow.

This transmission line crosses the following roads:


Bachelder Road, Route 28, Martin Hill Road, North Pembroke Road, Pinewood Road, Fuller Road, Flag Road, Sixth Range Road, Cross Country Road, Brush Road, 4th Range Road, Sheep Davis Road, Pembroke Street


Dowst Road, New Rye Road, Black Hall Road, Phillbrick Road


Cate Road, Nottingham Road, North Road, Church Street, Lang Road, Haynes Road, Thurston Pond Road, Mt. Delight Road

When Is The Work Being Done?

  • Local permitting: First through third quarter 2023
  • State permitting: First through third quarter 2023
  • Federal permitting: First through third quarter 2023
  • Construction start date: January 2024
  • Projected in-service date: First quarter 2025 (anticipated)
  • Restoration Completion: Second quarter 2025 (earlier, where possible)

This schedule is weather dependent and subject to change

Construction Updates

See the project fact sheet for details about activities occurring in your neighborhood.

      Community Outreach

      We are committed to engaging municipal officials, residents, businesses, community groups and other stakeholders about upcoming project activities through municipal briefings, mailings, site meetings, virtual meetings and door-to-door outreach.

      We utilize a variety of outreach methods to ensure that all customers and property owners along our transmission lines receive adequate and timely information about our projects. For this project, we will be sending periodic updates as letters mailed directly to all stakeholders, as well as a combination of the following additional methods:

      Commitment to Safety

      We take every safety precaution while working in local communities, and all people working on the construction project carry identification. The project work will not interrupt electric service to homes or businesses.

      We remain committed to prioritizing public health as well as the health of employees and contractors during COVID-19. All Eversource personnel follow applicable health and safety guidelines to help prevent the spread of COVID-19.

      Have Questions?

      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 888-926-5334 or