A pole for transmission lines for the New England Clean Energy Connect project that runs alongside existing transmission lines near Wyman Dam in Moscow, Maine, is shown in October 2021. Credit: Linda Coan O'Kresik / BDN

In a 39-page ruling, five members of Maine’s Supreme Judicial Court said the portion of the November 2021 referendum that retroactively prohibited the corridor project, which had previously secured a number of approvals, was unconstitutional.

The result still leaves the project in limbo. The court’s decision sends the project back to the business court for further proceedings. Massachusetts, which is paying for the corridor, has given CMP and its allies until the end of 2023 to fulfill the project that will help that state meet its clean energy goals and supply power to the regional grid.

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