Judith-Jasmin substation

Hydro-Québec is pleased to invite you to an open house at Judith-Jasmin substation construction site

Construction of the new Judith-Jasmin substation in Terrebonne is almost finished, and we are delighted to invite local residents to a free tour of the impressive construction site. Visitors are invited to tour the control building, to learn about electricity and safety, and to see the inside of some construction vehicles.

When: Saturday, June 16, 2018, from 1 to 3:30 p.m.

Where: 2440, boulevard des Entreprises, Terrebonne, north of the 640-Côté-Est industrial park

Tours are on foot and include some stairs. The event will be held rain or shine, and visitors must wear closed shoes. For more information, please leave us a phone message at 1 800 465-1521, ext. 6022.


Video: Judith-Jasmin substation in Terrebonne

Welcome to the jobsite!

There aren’t many people who can say they’ve toured a transmission substation construction site.

Project manager Martin Lavoie takes us to Judith-Jasmin substation currently being built in Terrebonne.

The substation will meet electricity needs on three levels: local, regional and provincial.

At present, the project involves some 200 workers. Earlier stages from design through approvals involved the input of close to 1,000.

In April 2016, Hydro-Québec began construction of Judith-Jasmin substation in Terrebonne. This 735/120/25-kV substation is located north of the 640-Côté-Est industrial park. The substation will be able to transform more than 2,300 MW, enough to power about 800,000 homes. Commissioning will start in fall 2018 (for the 735-kV portion) and finish in spring 2019 (for the 120-kV portion).

For more information, see the Project News bulletin. (in French only) [pdf — 2,63 Mb]

Underground infrastructure work in Terrebonne

To deliver electricity to the surrounding area, Hydro-Québec will build a 24-km-long network of underground conduits, including three crossings under highway 640.

Construction, which began in spring 2017 in a number of sectors in Terrebonne, is now coming to an end. We would like to thank our customers for their patience and understanding.

In the boulevard des Entreprises sector, between chemin Gascon and Judith-Jasmin substation, construction will be completed between June and December 2018. To ensure the safety of workers and the public, traffic disruptions are necessary near the work site. One lane will remain open at all times, and access to businesses will be maintained.

In the boulevard des Seigneurs sector, between avenue Claude-Léveillée and rue Durocher, site restoration work will take place in spring 2018. This will be the final construction phase.

In the boulevard de la Pinière sector, up to avenue Urbanova, construction will take place from May to December 2018.

Project in images

The following slide show contains images from: Judith-Jasmin substation

  • November 2017 – Aerial view.
  • November 2017 – Aerial view.
  • November 2017 – Delivery of a single-phase 735-kV shunt reactor. This piece of equipment stabilizes the voltage in the substation.
  • November 2017 – Deicing of the concrete base of a shunt reactor prior to its installation.
  • November 2017 – Installation of a shunt reactor on its concrete base in the oil containment basin.
  • November 2017 – Installation of equipment for the 735-kV section of the substation.
  • November 2017 – Installation of equipment for the 735-kV section of the substation.
  • November 2017 – View of the 735-kV section of the substation, including towers and support systems for electrical equipment, such as current transformers, insulators, etc.
  • November 2017 – Thermite welding for the grounding of electrical equipment. Grounding ensures the safety of workers and equipment, particularly in case of short circuit.
  • July 2017 – At the heart of the jobsite: In the distance are substation buildings. In the foreground foundations are being laid and the drainage system is being installed.
  • July 2017 – 735/120-kV control building.
  • July 2017 – Installation of equipment support structures and busbar assemblies.
  • July 2017 – Preparation of the base for a foundation. Next step: installation of formwork.
  • July 2017 – Framework for foundation pads. Next step: placing reinforcing steel.
  • July 2017 – Aerial view of foundations for some of the substation equipment.
  • July 2017 – Visual simulation of Judith-Jasmin substation
  • May 19, 2016 – Preparing the ground and overview of the new substation’s site.
  • May 19, 2016 – Preparing the ground and overview of the new substation’s site.
  • July 2017 – Aerial view.