Project overview

Landscape in the study area

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.

Poste des Appalaches, à Saint-Adrien-d’Irlande
Appalaches substation, in Saint-Adrien-d’Irlande