Hogg’s Hollow Bridge
Toronto, ON

Hogg’s Hollow Bridge is a set of four separate highway bridges which span the Don River Valley in Toronto, Ontario and carries 14 lanes of Highway 401. The four structures are the busiest multi-span bridge crossing in North America. Given the importance of this segment of highway, the Ministry of Transportation was particularly concerned with the development of construction staging plans and the mitigation of traffic during the rehabilitation of the Hogg’s Hollow Bridge.

The re-decking and widening of Highway 401’s Hogg’s Hollow Core Structures is one of the largest bridge engineering projects using primarily structural steel in recent years.

Structural engineer
Morrison Hershfield
Facts & Figures
  • Steel tonnage: 1,400 tons
Our Role

Walters Inc. provided specialty fabrication services to work with the pre-existing heritage bridge and provided all on-site construction of structural steel for the project.

Overcoming Challenges

With a total of over 1,200 tons of high-grade 350WT steel used, the installation was completed amidst the busiest traffic conditions in the country, with minimal disruption to the road users. The innovative solutions and careful sequencing of the works were key, allowing the completion of the project over one year ahead of schedule and within the owner’s budget.


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