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Work progress by region


Video: The Chamouchouane project in the Saguenay–Lac-Saint-Jean and Mauricie regions

Welcome to the jobsite!

Construction manager Jocelyn Jean invites us to the northernmost reaches of the Chamouchouane site.

Beginning at La Doré substation, the new power transmission line will run for over 200 km through Saguenay–Lac-Saint-Jean and the Mauricie.

Construction of the project, which takes place in the forest on many sites simultaneously, involves a small army of workers.

See the view from atop a tower supporting lines carrying 735 kV, the highest voltage level in Québec . . . Welcome to the jobsite!

Clearing the right-of-way – Lac-St-Jean


Le contenu qui suit est un diaporama d’images sur : Projet Mauricie en image

  • Installation of foundation in overburden for guyed tower
    This type of foundation weighs nearly 5 tonnes and supports a vertical load of nearly 250 tonnes, or 50 times its own weight.
    The foundation transfers the load to the ground the same way a snowshoe redistributes a person’s weight on the snow.
  • Backfilling of foundation
    To prevent the foundation from shifting under the weight of the tower and to avoid frost heave, backfill must be applied directly on top of it with great care.
  • Backfilling Inspection
    To make sure the foundation will stay in place for the next 100 years, the quality of the backfill material and its application is monitored throughout the backfilling process.
  • Installation of counterpoise wire
    In the event of a short circuit on the line, the current can travel through the tower to reach the ground. A metal wire, known as a counterpoise wire, sends the current quickly into the ground.
  • Construction of the line at Saguenay–Lac-Saint-Jean
    In the foreground is a guyed angle tower with three masts. Most of the towers on the line are V-shaped, but triple-masted towers are required wherever the line changes direction.

Over the next few months in the Lac-Saint-Jean area (section 1 of the line)

Clearing work has been completed and construction work will be taking place from fall 2016 to the end of 2017. Work to expand Chamouchouane substation also began last fall.

For more information about the steps involved in the construction of a transmission line

Companies on the ground

Hamel Construction Inc.
2106 Route Principale, Saint-Édouard-de-Lotbinière (Québec) G0S 1Y0
Telephone: 418 796-2074


An increase in traffic is expected on the access roads leading to the jobsites in the morning and at the end of the day.

Safety near the worksite

Hydro-Québec asks residents to be particularly careful near the jobsite. Various types of equipment will be in operation to carry out the work, including at night and on weekends. It is therefore very important to remain clear of the work areas. Hydro-Québec will ensure supervision of the work site. The company will see to it that all technical, environmental and safety requirements associated with the construction work are being met. Specific measures to mitigate the impact of the work will be implemented, contributing to the harmonious coexistence of the worksite and land users.

For more information

Info-project line: 1-877-535-3737

Line route map for the Chamouchouane–Bout-de-l’Île project in the Saguenay–Lac-St-Jean region

Information based on current planning and subject to change.