Chamouchouane–Bout-de-l’Île Transmission Line

Rank 2024


Image Credit: Hydro-Quebec

Industry Sector: Energy

Project Type: Transmission

Project Value: $1.4 billion

Funding Source: Public

Provincial Funding: $1.4 billion

Province: Quebec

City / Region: Saguenay to Montreal

Estimated End Date of Substantial Completion: 2018

This project includes building a new 735-kV, 406-kilometre transmission line to increase its capacity to bring power from the north to the south. In the LacSaint-Jean region, four transmission lines bring power to the Chamouchouane and Saguenay substations from the north (from Baie-James on one side, and Côte-Nord on the other), while only three run southwards. This creates a funnel effect and limits the system’s capacity to bring power to the south, where the major load centres are located. To reduce pressure on the system and mitigate this funnel effect, reinforcement between the Chamouchouane substation and the Montreal metropolitan loop is necessary. Construction began in 2015, with a completion date expected around September 2018.

Project Owner: Hydro-Québec

Contractor: Pomerleau (Chamouchouane-Bout-de-l’Île Section 6 Power Line - Caisson Piles for the 315 kV and 735 kV Towers)

Environmental Services: WSP (environmental impact study)

Other Key Players: Englobe (geotechnical investigation)

Supplier Other: Canam Group

2018 Rank: 38

2017 Rank: 34

2016 Rank: 34

2015 Rank: 39