RAY BROOK — The state Adirondack Park Agency Board of Commissions voted Friday to allow National Grid and the New York Power Authority to construct a power line connecting to the Tri-Lakes area on six acres of forest preserve in St. Lawrence County, pending its formalization through a constitutional amendment.

In exchange for the six acres, National Grid will add 10 acres of its land in St. Lawrence County to the forest preserve. The land will be transferred to NYPA, with National Grid getting full ownership of the land in 2012.

Board members Richard Booth, James Townsend and Christopher Walsh, designee for the Department of Economic Development commissioner, voted against the line, saying construction on forest preserve is a violation of the state constitution.

The line will be 26.8 miles long total, and the portion the APA had to approve will run through the town of Colton. Work on clearing trees for the project has already begun, as the stat