Wilder — TransCanada Corp. on Thursday said it has completed the sale of 13 hydroelectric dams along the Connecticut and Deerfield rivers to a Boston-based investment firm.

Great River Hydro LLC, an affiliate of ArcLight Capital Partners LLC, bought the dams for $1.06 billion, TransCanada said.

The hydrofacilities, which include the Wilder Dam and a facility in Bellows Falls, Vt., have a total generating capacity of 584 megawatts.

The Vermont Public Service Board signed off on the deal earlier this month.