Project overview

An asset sustainment project that will ensure the long-term reliability of electricity service

The existing 120-kV line (kV = kilovolt or 1,000 volts) has reached the end of its useful life. Commissioned in 1964, it supplies some 10,000 customers.

From Beaumont substation, in the Villeray–Saint-Michel–Parc-Extension borough, it travels through Rosemont–La Petite-Patrie and Plateau-Mont-Royal to supply Dorchester substation, in the Ville-Marie borough.

To ensure the reliability of Hydro-Québec’s power system and meet growing demand over the medium and long term, this line needs to be converted to 315 kV.

Commissioning is planned for 2019.

Location of the planned underground Beaumont–Dorchester line [PDF — 647  Ko - In French only]

Construction work involved in the rebuilding project

  • Upgrading of the underground line between Beaumont substation and Dorchester substation to 315 kV by rebuilding it in a new conduit.
  • Dismantling of the electrical equipment in the existing conduit.
  • Related work at Beaumont and Dorchester substations.

Learn more about the project’s stages and the project schedule.

The project and the community

Hydro-Québec implements a public participation process in order to consider the expectations and concerns of the community and its representatives so as to best adapt the project to local realities. All persons affected by, or interested in the project can ask questions or submit their comments.