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Scarborough Subway Extension

Scarborough Subway Extension - Procurement Updates

  • The Scarborough Subway Extension is being delivered as two separate contracts issued through Infrastructure Ontario and Metrolinx.
  • The first is the advance tunnel contract, which is a public-private partnership (P3) contract.
  • The second procurement package is the systems, rail and stations contract. The procurement model for this work is still to be confirmed.

On August 5, the Province of Ontario announced that three teams were shortlisted to bid on the advance tunnel contract on the Scarborough Subway Extension; Acciona, Strabag Inc., and East End Connectors. On August 20, the province invited the three teams to respond to a Request for Proposals that details how they plan to design and deliver the tunnelling works. Infrastructure Ontario (IO) and Metrolinx expect to award this tunnelling contract in mid-2021.

The stations, rail and systems contract will begin procurement in 2021.

Package #1: Advance Tunnelling

The advance tunnelling package is a design-build-finance contract. The winning bidder will build the following:

  • 7.8-kilometre single tunnel.
  • Tunnel boring machine launch shaft.
  • Tunnel boring machine extraction shaft.
  • Headwalls for the three proposed stations and seven of eight emergency exit buildings.

Package #2: Stations, Rail and Systems

  • Systems (including traction power substations) and all surface facilities (including emergency exit buildings).
  • Rail and stations: Lawrence, Scarborough Centre and Sheppard.
  • Commissioning, which is the process of testing, adjusting, and verifying that the transit service and all systems are fully and properly functional and safe.

In late 2019, a series of early works projects began for each work package. They included drilling at multiple locations on McCowan Road and survey work on the right of way. The first utility relocation also occurred in 2019. The number of utilities will vary by location and include moving hydro, water mains, sewers, and telephone lines, traffic lights and street lighting.