A six-month delay in bringing the proposed New England Clean Energy Connect online would cost Central Maine Power an additional $31 million, while a one-year delay would raise that figure to $37 million, the company has revealed in court filings.

Powerline contractors had planned to begin clearing work as early as Dec. 4. CMP now says forest clearing for its transmission corridor in western Maine has been put off until at least Dec. 18. But it says it needs to begin by early January to meet contract obligations, be off the ground before the spring thaw, and protect vulnerable wildlife.