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Northumberland to Dummer (O154) Line Rebuild Project

Why Are We Doing This Project?

Recent inspections and engineering analysis of the O154 transmission line revealed that many of the structures are in poor condition due to their age, woodpecker damage, insect damage and pole rot.

A total of 138 wooden H-frame structures are being replaced with 137 weathering steel H-frame structures. In addition, the conductor (wire) is being replaced with fiber optic cable, known as Optical Ground Wire (OPGW).

Improvements are 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 O154 Line, a 115-kilovolt (kV) transmission line built in 1946 that is 12.6 miles long.

o154-route

The O154 line starts at the Lost Nation Substation in Northumberland and terminates at the Paris Substation in Dummer.

This transmission line crosses the following roads:

Northumberland

Lost Nation Road

Stark

Potter Road, Route 110 (Stark Highway), Lunn Road, Northside Road, Christine Lake Road, Paris Road

Dummer

Holt Road, Kelley Brook Road, Cedar Pond Hill, Dummer Pond Road

When Is The Work Being Done?

  • Local permitting: Second quarter 2022
  • State permitting: Fourth Quarter 2021
  • Federal permitting: Fourth quarter 2021
  • Construction start date: Third quarter 2022
  • Projected in-service date: Fourth quarter 2023 (anticipated)

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.

This map set is subject to change due to permitting, constructability and other considerations.

Week of January 23, 2022

Work area preparation at structures:

  • 3, 13-27 – Lost Nation Road, Northumberland
  • 29-37 – Route 110/Stark Highway

Drilling at structures:

  • 2-16 – Lost Nation Road, Northumberland
  • 38, 39 – Northside Road, Stark
  • 58 – Lee Hill Road, Stark

Week of January 30, 2022

Work area preparation at structures:

  • 3, 13-27 – Lost Nation Road, Northumberland
  • 29-37 – Route 110/Stark Highway

Drilling at structures:

  • 2-16 – Lost Nation Road, Northumberland

Preparing for/installing new structure(s):

  • 51-63 – Lee Hill Road, Stark

Week of February 6, 2022

Work area preparation at structures:

  • 3, 13-27 – Lost Nation Road, Northumberland
  • 29-37 – Route 110/Stark Highway

Drilling at structures:

  • 2-16 – Lost Nation Road, Northumberland

Preparing for/installing new structure(s):

  • 51-63 – Lee Hill Road, Stark

Read the project fact sheet

Read the construction fact sheet

Read the most recent project update letter

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 NHProjectsInfo@eversource.com.