The group plans to rally in Augusta before heading into Friday’s meeting.

The New England Clean Energy Connect aims to bring vast amounts of hydropower from Quebec to meet the needs of energy users in Massachusetts. Supporters say the project will save Massachusetts and Maine ratepayers hundreds of millions of dollars a year.

The power corridor would run from Beattie Township, on the Canadian border north of Coburn Gore, through Farmington and Jay to connect with the power grid in Lewiston. It would cross the Kennebec Gorge, a scenic, 10-mile stretch popular with whitewater rafters.