Champlain Bridge Deconstruction Engineering

Montreal, Québec

The original Champlain Bridge joining Brossard to Montréal had been one of Canada’s busiest vehicular bridges until its closure in 2019. Harbourside and sub-consultant gbi, served as the deconstruction engineer for Nouvel Horizon Saint-Laurent (NHSL), the contractor designated to deconstruct the structure. Harbourside and gbi oversaw all phasing and sequencing, temporary works, and means and methods for the deconstruction. Sophisticated jacking techniques for lifting and lowering concrete spans, that incorporated real-time monitoring of various parameters such as load distribution and barge movements ensured precise control and safety during critical operations and efficient dismantling of the steel superstructure. The project's success enhanced public perception of engineering while paving the way for future projects to consider similar innovative deconstruction methods.

The jury was highly impressed with the skillful deconstruction of this massive structure in a challenging river environment that included an active nautical area, demonstrating impressive technical expertise and a deep understanding of structural theory. They also commended Harbourside for recycling 90% of materials, resulting in a $400M benefit, for meticulous dust management and berm work, and for protecting the blue heron spawning area below the bridge. The jury felt that this demonstrated a commitment to both education and environmental responsibility.

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Hear what the Jury Chair had to say about this project.