Proposed Power Line Expansion Casts Shadow Over AT, Maine Woods

The battle over a proposed power transmission line is looming large in the Maine North Woods as environmental and sporting groups join towns in the line’s path to oppose the project.

The 145-mile high-voltage line from the Canadian border to Lewiston, Maine, crosses the Appalachian Trail between Caratunk and Moxie Bald Mountain, linking up with the New England power grid in Lewiston. The power is destined for Massachusetts, which is paying an estimated $950 million for the transmission line to bring hydropower from dams in Canada in an effort to boost its renewable energy footprint.

Central Maine Power transmission line through Maine, with new corridor in green and existing power line corridor in yellow. Source: Central Maine Power

At a public hearing in Lewiston on December 5, foes of the transmission line proposed by Central Maine Power (CMP) said it would damage Maine’s North Woods, a recreation hub for anglers, hikers, hunters, snowmobilers, and water sports enthusiasts. The woods are prime wildlife habitat.

A study by the Outdoor Industry Association estimates Maine’s outdoor recreation economy generates $8.2 billion in annual consumer spending and 76,000 jobs.

Opponents have also called on the US Army Corps of Engineers to conduct a full-scale environmental review of the transmission line project, known as New England Energy Connect (NRCEC), as it did for the similar Northern Pass proposal in New Hampshire that eventually was rejected by the state.

The US Environmental Protection Agency told the Army Corps in May that it had major concerns with the transmission line review, and questioned whether CMP fully considered less-damaging alternatives.

“The proposed route will slice through a globally significant forest,” said Susan Arnold, the Appalachian Mountain Club’s vice president for conservation in Maine’s western region. “This kind of infrastructure fragmenting the forest can have a lot of implications for the health of the forest, climate change, wildlife, and more.”

The AMC points to the New England Clean Power Link, a 150-mile transmission line through Vermont that will be completely buried underground, as an example to follow. The line has received all the necessary permits and will carry Canadian hydropower from the Canadian border to Ludlow, Vermont.

In response to suggestions that CMP bury all or part of the transmission line, the utility said it would increase the cost from $950 million to $1.6 billion.

The CMP high-voltage power line is opposed by more than 20 Maine towns that it passes through. And 65 percent of Maine residents oppose the transmission line, with 15 percent supporting it, according to a poll conducted by Critical Insights, a research company based in Portland, Maine.

In western Maine, where a new 53-mile corridor would be cut through forests for the line, 90 percent of voters in Franklin County and 83 percent of voters in Somerset County oppose the line, according to the poll.

The survey of 850 Maine residents was conducted from March 11 to March 27, 2019.

The existing transmission line corridor crossing the Sandy River in Farmington, above; a photo simulation of the proposed expansion and new single-pole towers, below. Photo and photo simulation via

The energy project brings together CMP and Hydro-Quebec, Canada’s huge hydropower utility. CMP anticipated having all its permits in place around the end of 2019, with completion expected in late 2022.

The new 53-mile path would be cut from Beattie Township on the Canadian border to The Forks on the Kennebec River. An existing 92-mile corridor from The Forks to Lewiston would be expanded.
CMP says 850 single-pole towers at an average height of 80 feet, with some rising more than 100 feet, would be erected in the power corridor. They would be in addition to existing towers in the corridor running from The Forks to Lewiston.

The AT crosses the current transmission corridor three times as it follows the lowland between Pleasant Pond Mountain and Moxie Bald Mountain east of Caratunk.

The AMC says the expanded corridor with taller towers would be visible from those two high points.

CMP’s parent, Avangrid, has suggested eliminating two of the AT crossing, but no agreement has been reached.

The AMC says Avangrid should work with local AT managers on any relocation.

In one concession to the outdoor recreation industry in Maine, CMP has agreed to build a tunnel under the Kennebec River Gorge instead of running transmission lines above the gorge. The gorge is a prime whitewater rafting destination and a major economic driver for surrounding towns.

The Natural Resources Council of Maine contends that sending power from Canada’s dams to Massachusetts would not benefit the environment because it would divert energy from existing markets in Ontario and New York.

But other groups, such as the Conservation Law Foundation, say Hydro-Quebec would create new hydropower that would be sent to Massachusetts and that would help reduce carbon emissions.

CMP said that in conjunction with Hydro-Quebec it would provide more than $200 million in economic benefits to Maine residents, including $50 million to help low-income Mainers reduce their energy costs and $140 million to reduce rates for all Maine electricity consumers, for 40 years.

In contrast, the Outdoor Industry Association study estimated that the outdoor recreation economy in Maine generates 76,000 direct jobs, $8.2 billion in consumer spending, $2.2 billion in wages and salaries, and $548 million in state and local tax revenue.

Massachusetts turned to Maine for a transmission line path from Canada after the Northern Pass power line, which would have traveled through the White Mountains from Canada to Massachusetts, was rejected by New Hampshire.

Farther south on the AT, two proposed natural gas pipelines are being held up by court battles.

The US Supreme Court said in October that it would consider reinstating a pipeline permit that was rejected by a lower court. The Atlantic Coast Pipeline would pass through George Washington and Monongahela National Forests and cross under the Appalachian Trail.

The Mountain Valley Pipeline, which would run under the AT atop Peters Mountain in Jefferson National Forest near the Virginia-West Virginia border, has been held up since summer 2018.

Feature photo simulation of proposed power transmission line via

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Comments 3

  • Scott H. : Dec 20th

    Being pro-renewable energy and anti-transmission lines is an untenable position.

  • Jim Crowell : Dec 21st

    Bury it. They didn’t learn their lesson here in NH.

  • Supreme : Dec 25th

    To be clear, Maine is a solid blue (owned and run by liberal democrats) state. These proposed power lines have absolutely nothing to do with President Trump and/or his supporters. Left wingers need electricity too. Smh


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