The project involves building an interconnection between Hydro‑Québec’s power system and Maine in order to increase the exchange capacity between Québec and New England.
A transmission line extending approximately 100 km will be built between Appalaches substation in Saint‑Adrien‑d’Irlande (near Thetford Mines in the Chaudière‑Appalaches region) and a connection point on the Québec‑Maine border.
The new 320‑kV direct-current line will connect to the future New England Clean Energy Connect (NECEC) line, slated for construction in Maine.
In tandem with this project, a new AC‑to‑DC converter will be installed at Appalaches substation to supply the planned transmission line.
Commissioning is scheduled for 2022.