Aecon consortium to build Highway 401 Expansion project


West Corridor Constructors has reached financial close on the Highway 401 Expansion project in the Greater Toronto Area. The total contract is valued at $639.8 million.

West Corridor Constructors, selected by Infrastructure Ontario and the Ministry of Transportation Ontario to design, build and finance the project, is a consortium comprised of Aecon Group (with a 50% stake), Parsons (30% stake) and Amico (20% stake).

The Highway 401 Expansion is an approximately 18-kilometre 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.

Construction is expected to commence in the fourth quarter of 2019, with anticipated substantial completion in the fourth quarter of 2022.


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