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Concord to Bow (P145) Line Rebuild Project

Why Are We Doing This Project?

Recent inspections and engineering analysis of the P145 and co-located transmission lines revealed that many of the structures are in poor condition due to their age, woodpecker damage, insect damage and pole rot.

The P145 transmission line currently has 165 total structures. Six of those are weathering steel, and the remaining 159 wooden H-frame and monopole structures are being replaced with 154 weathering steel structures of a similar design. Five wooden structures are being removed without a replacement. In addition, the conductor (wire) is being replaced, and fiber optic cable, known as Optical Ground Wire (OPGW), is being installed the entire length of the line.

This maintenance is part of our ongoing investments to deliver reliable energy to our customers and communities.

Where Is The Work Being Done?

This work will take place within the existing right-of-way (power line corridor) of the P145 Line, a 115-kilovolt (kV) transmission line built in 1966 that is 12.5 miles long.


The P145 line starts at the Farmwood Substation in Concord and ends at the Merrimack Substation in Bow.

This transmission line crosses the following roads:


Farmwood Road, Shaker Road, Oak Hill Road, Appleton Street, Curtisville Road, Portsmouth Street, Interstate 393, Loudon Road, Pembroke Road, Regional Drive, Chenell Drive, Garvins Falls Road 


Pembroke Street (Route 3)


Ferry Road

When Is The Work Being Done?

  • Local permitting: First and second quarter 2022 (complete)
  • State permitting: First and second quarter 2022 (complete)
  • Federal permitting: First through third quarter 2022 (complete)
  • Construction start date: Third quarter 2022
  • Projected in-service date: Second quarter 2024

Restoration will be ongoing during construction for stabilization to the extent it's possible.

This schedule is weather dependent and subject to change

Construction Updates

See the construction fact sheet for details about each construction activity listed below.

See the construction map set for the locations of structures.  

Week of September 25

Civil at structures: 

  • 47 - 53 (M108): Portsmouth Street, Concord

Drilling at structures:

  • 41 (C189): Farmwood Road, Concord
  • 20, 22, 27 (H137): Lincoln Drive, Bow

Line work/structure replacements at structures:

  • 9, 10, 13, 17, 20, 22-29 (H137): Garvin Falls Substation

Week of October 2

Civil at structures: 

  • 9, 10, 13, 17, 20-29(H137): Garvin Falls Substation

Drilling at structures:

  • 61 (M108): Portsmouth Street, Concord
  • 5 (C189): Portsmouth Street, Concord

Line work/structure replacements at structures:

  • 9, 10, 13, 17, 20, 22-29 (H137): Garvin Falls Substation

Week of October 9

Civil at structures:

  • 9, 10, 13, 17, 20-29(H137): Garvin Falls Substation

Drilling at structures:

  • 40 (M108): Portsmouth Street, Portsmouth

Community Outreach

We're 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, while adhering to COVID-19 social distancing and other related health and safety guidelines.

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