LONDONDERRY — Public Service of New Hampshire officials said the need for electricity and reliability is growing.

That's why the company is planning to construct a new transmission line to address those needs and help the utility provide better service to its customers.

PSNH lead project manager David Plante was among the company officials who gave an overview of the transmission plan to town councilors at a meeting Nov. 17.

He said the company's infrastructure is aging and needs attention.

The plan calls for 18 miles of new transmission, with 10 miles of line going through Londonderry and into Hudson.

The lines would begin near the Scobie Pond substation, then head southwest through Londonderry down toward Hudson through West Road and Route 102.

PSNH officials said they wanted to provide Londonderry officials with a snapshot of what the project is all about.

Town Councilor John Farrell questioned whether the new transmission line project would look the same.

Plante said the new lines will resemble structures that have been previously used in Londonderry.

Farrell also asked how the new service would affect the town and whether it would help keep power outages toa minimum.

"This is the superhighway of the utility system," Plante said. "But this won't do anything for the tree that comes down."

The project is still in the planning stages. Plante said applications will be submitted to the state for approval by next spring.

Early work would be tree work, "earth work" and then digging holes for new utility poles.

That construction could begin in late 2016 and last into 2017.

The new transmission line could be operational by 2018.

No local permitting will be necessary, project manager Suzanne Findland said.

She said public hearings will be scheduled as part of the process to keep the community aware of the plans and to gain input from residents with any concerns.

"We will also look for input from the community, town officials, state officials," she said.

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