Line project

What is the status of the project?

The project is on schedule. Land clearing is finished, and construction of the line has begun in several sectors of the Saguenay–Lac-Saint-Jean, Mauricie, Lanaudière and Montréal regions.

Why is this project necessary?

Hydro-Québec is responsible for ensuring the safety and reliability of the transmission system. The grid is constantly evolving according to changing transmission needs and the increase in power consumption, and the demands placed on the 735-kV lines are growing steadily.

In the Saguenay—Lac-Saint-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 on the transmission system and limits the capacity to bring power to the south, where the major load centres are located.

Zone de convergence des corridors de transport d’énergie de la Baie-James et de la Côte-Nord.

The optimal solution for maintaining the system’s reliability is to build a new transmission line connecting the power grid in northeastern Québec to the Montréal metropolitan loop.

System planning takes account of new power supplies generated by the Romaine complex and the wind farms approved following the second call for tenders in 2005. Adding this new electricity to the grid will increase north-south power transmission and accentuate the funnel effect around the Chamouchouane and Saguenay substations.

In addition, the Chamouchouane-Bout-de-l’Île project will considerably reduce electricity losses, reinforce the main transmission network, and increase the network’s operating flexibility for the benefit of all customers.

What economic impacts will the project have?

The project’s economic spinoffs for Québec are estimated at $1.1 billion, representing more than 80% of the total investment.

The project will create the equivalent of several hundred full-time jobs in Québec over a five-year period. At the height of construction, between 2017 and 2018, it will employ more than 1,500 workers.

The 735-kV Chamouchouane–Bout-de-l’Île project will also stimulate the regional economy.

Generally speaking, regional economic spinoffs amount to 10% to 15% of the cost of a transmission line project.

No workcamps will be built along the line. During clearing and construction, workers will find accommodations near their worksites, promoting economic spinoffs in the affected regions.

Will there be any other measures to support the development of the communities affected?

Hydro-Québec wants its facilities to blend harmoniously into the host environment. It sees its projects as opportunities to actively participate in the development of host communities and has set up the Integrated Enhancement Program (IEP) with this intent.

For each new power transmission project covered by this program, Hydro-Québec grants eligible organizations funding equivalent to 1% of the initially authorized value of the facilities covered by the IEP.

What are the project components?

This project consists of three key components:

  • Building a new 400-km 735-kV transmission line between Chamouchouane substation in La Doré (Lac-Saint-Jean) and the future Judith-Jasmin substation, in Terrebonne.
  • Building the 735/120/25-kV Judith-Jasmin substation.
  • Diverting a section of an existing 735-kV line (circuit 7017) over 19 km. This line will supply Bout-de-l’Île substation in Montréal.

The type of tower used will vary according to land use, but will be mainly guyed towers in the north and self-supporting towers in the south.

To learn more about types of towers:

What are the main steps involved in building a line?

Building a 735-kV line involves several steps.

  1. Clearing
    Clearing consists of felling the trees in the right-of-way and where temporary roads will run. On public land, this work is assigned to contractors, whereas on private land it can also be assigned to the owners. On public land, merchantable timber is recovered after felling and sent to local sawmills. On private land, the cut wood belongs to the owner.
  2. Access development
    Clearing requires the creation of temporary roads and, at times, the improvement of existing roads, which will also be used when building the line. Whenever possible, temporary roads are built in the right-of-way, while protecting sensitive elements (e.g., wetlands, water crossings). For existing roads, Hydro-Québec makes every effort to promote shared and safe use. On private land, the company negotiates temporary access with affected owners.
  3. Laying the tower foundations
    This step involves excavation, filling and leveling. Foundations vary based on the type of tower, the type of soil and the depth of the bedrock.
  4. Tower assembly and conductor unwinding
    This step includes several operations: assembling towers on the ground, erecting towers and installing insulator strings, conductors and ground wires. This work is carried out by different tradespeople.
  5. Site restoration
    This final step in the construction process includes cleaning up the worksites, ground levelling and reshaping, filling ruts, seeding worksites around towers and restoring infrastructure (e.g., roads, bridges and culverts, fences, etc.). On private land, a tour of the site is conducted with the landowner to ensure that the restoration work meets their expectations.

    To learn more about the steps involved in building a line:

When will the construction work be carried out?

Clearing and construction work for the lines will last three years, and the project is carried out on the territory of five administrative regions.

For construction, the project is divided into six line sections, each with its own distinct clearing and construction schedule, as shown in the map.

Who ensure worksite compliance?

Hydro-Québec ensures worksite compliance. The company sees 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 are implemented, contributing to the harmonious coexistence of the worksite and land users, both on public and private lands.

Will there be significant traffic from heavy machinery?

Traffic from heavy machinery is anticipated mainly during clearing and excavation work, and during the construction of tower foundations.

During tower erection and wire installation, heavy machinery traffic will be sporadic and localized.

Appropriate signage will be installed on public roads affected by the worksite.

Are any interruptions to electrical service anticipated during the work?

No service interruption is anticipated during the work.

How will you inform stakeholder groups of the start and progress of the work?

Project news bulletins will be sent to local organizations in communities affected by the project and to the owners and residents in the areas closest to the construction sites.

Information on the progress of the work and photos will also be posted on this Web site.

In addition, in each region, the Info-project Line will remain available at all times.

How will you ensure the safety of ATV and snowmobile users during the work?

During the work, ATV and snowmobile user safety is ensured through adequate signage and the implementation of specific measures (signage, marking, adequate snow removal) that promote harmonious coexistence when ATV and snowmobile paths run through logging roads accessible during construction.

Will construction work be carried out during hunting season?

Below are the planned break dates for 2018.

Section 2: moose hunt

  • Zec du Gros Brochet, Zec Chapeau-de-Paille and Pourvoirie Duplessis: October 6 to 21, 2018
  • Outside these areas: October 6 to 14, 2018

Section 4: moose hunting

  • Zec Collin and Zec Lavigne (15 Est hunting area): October 7 to 14, 2018, during firearm hunting season.
  • Outside these areas: October 7 to 14, 2018

Sections 4 and 5: deer hunting

  • November 3 to 18, 2018 (9 Est hunting area)

For more information, please get in touch with a member of our team by calling the info-project line for the region in question..

What jobs will be available?

In an electricity transmission project like this, the main categories of workers on the jobsite are the following:

  • workers for contracts related to clearing and building roads
  • equipment operators
  • assemblers
  • line workers
  • foremen
  • laborers

Note that Hydro-Québec is the project owner: most jobs associated with the project will be with the contractors who will be awarded the contracts.

Ongoing and future work

For more information on the contracts awarded: Ongoing and future work (in french).

Who do we contact if we have questions or concerns during the work?

You can reach us anytime through the Info-project Line or by contacting your region’s Advisor – Community Relations.

Documentation and contacts