The New England Clean Energy Connect (NECEC) transmission line — also known as the CMP corridor — will be online by the end of the year, in time to supply power to the grid for the winter season, according to a winter energy plan released by ISO New England.

"We're expecting people in New England on some of those colder days to use anywhere between 20 to 21,000 megawatts of power," said ISO NE spokesperson Mary Cate Colapietro. "That's pretty similar to last winter's peak demand day."

The NECEC electricity transmission line will carry 1,200 megawatts of hydropower from Quebec to the New England grid.

The controversial project was first proposed in 2017 and had been rejected by Maine voters at referendum four years ago. But it came back online after Avangrid won a court victory in 2023.

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