Canadian Consulting Engineer

Aecon-led consortium closes $639.8M deal on GTA Highway 401 West Expansion

April 29, 2019

West Corridor Constructors consortium design team includes Parsons (lead designer), Hatch and EXP.


Highway 401 (source: Infrastructure Ontario)

Canadian construction giant Aecon Group has announced that its consortium West Corridor Constructors has reached financial close with Infrastructure Ontario on the Highway 401 Expansion design-build-finance project in the Greater Toronto Area (GTA) with a contract valued at $639.8 million.

West Corridor Constructors development consortium includes: Aecon (50%), Parsons (30%) and Amico (20%).

West Corridor Constructors entire team includes:

  • Developer: Aecon infrastructure Management Inc. (Aecon), Parsons Inc. (Parsons), and Amico Design Build Inc. (Amico)
  • Constructors: Aecon, Amico, Parsons Inc.
  • Designers: Parsons (Lead Designer), Hatch, EXP
  • Financial: National Bank Financial

Construction is expected to begin in Q4 2019, with substantial completion in Q4 2022.


The Highway 401 Expansion is an approximately 18km reconstruction and widening project in the western part of the GTA, from the Credit River in Mississauga to Regional Road 25 in Milton, consisting of two 10-lane segments, two 12-lane core collector systems and median High Occupancy Vehicle (HOV) lanes.

The scope of work also includes bridge reconstruction and replacement, structural culvert replacements, drainage and utilities work, as well as ecological restoration.


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