Visual simulation of Saint-Patrick substation.

Hydro-Québec is starting the construction of a new 315/25-kV transformer substation, Saint-Patrick substation, to meet increasing demand and ensure the long-term operability of facilities, including Atwater substation. Atwater substation, commissioned in 1929, is one of the oldest on the island of Montréal. It has reached its peak capacity, and some of its equipment needs to be replaced.

The project also calls for the construction of a short line to supply the new substation.

Saint-Patrick substation will be able to handle the area’s short- and long-term power needs, in tandem with Atwater substation.

Construction is scheduled to continue until 2019.

Enhancements to chosen solution

After the public hearings, changes were made to the project, including the following:

  • Making the parking area 44% smaller
  • Making the green strip on Rue Saint-Patrick 113% bigger and adding a green strip behind the substation
  • Adding considerably more tree plantings (33 hardwoods and 31 conifers, compared with 19 hardwoods in the original proposal)
  • Planting trees to offset the loss of 0.24 ha cleared, at a site chosen by the borough (recommended by the Bureau d’audiences publiques sur l’environnement)