Bill Quinlan

Annie Ropeik / NHPR

Eversource capped construction of a new high-voltage transmission line from Londonderry to Tewksbury, Mass., Wednesday.

The Merrimack Valley Reliability Project aims to make service more reliable and a little cheaper for customers in both states.

The 345-kilovolt line stretches 25 miles along state right-of-ways. Eversource says it will power up to 400,000 homes at peak demand.

Eversource paid less than a third of the project's cost of $129 million, with National Grid covering the rest in Massachusetts and parts of New Hampshire.

Chris Jensen for NHPR


In Whitefield Wednesday night, Northern Pass officials told Coos residents burying the entire transmission line would be so expensive the project couldn't move forward.

The public meeting for Coos County was one of a series required by the state before Northern Pass can seek approval from the state's Site Evaluation Committee.