Deconstruction of the original Champlain Bridge

The Champlain Bridge, which opened in 1962, is a major complex structure extending more than 3.4 km in length and spanning sensitive zones of the St. Lawrence River and Seaway.

The Champlain Bridge has undergone numerous major repairs over the years, and has reached the end of its useful service life. In light of this, the federal government decided to deconstruct the old structure and build a new one. Deconstruction will liberate seven hectares on the shorelines and allow for the creation of land for public use. This component of the project, entitled “Héritage Champlain”, is a program aimed at enhancing the value of the shorelines and the Estacade that crosses the St. Lawrence River.

Specific characteristics of the structure

  • Vital economic link between Montréal, the Montérégie region and the United States (more than $20 billion worth of goods cross the bridge each year)
  • Concrete/steel cantilever structure with a 215 m central span crossing over the Lawrence Seaway
  • Slightly more than 3.4 km in length, including the concrete approaches, with decks consisting of pre-stressed beams held together by a post-tensioned transverse system
  • The structure comprises 56 piers (48 single and 8 triple)

Risk management

The deconstruction of the Champlain Bridge involved major risks and significant difficulties due to its composition, its deteriorated condition and the substantial reinforcement work that had been carried out over the years. Our role was to ensure that the work methods adopted by the selected design-construction contractor complied with the contract while minimizing the risks. A number of complex work methods were required due to the many types of reinforcements carried out as a result of the varying degrees of deterioration of the structural components. Each method entailed risks that could have compromised one or more components in terms of health, the environment and sustainable development, along with scheduling and construction costs.

Planning for deconstruction work took into account the project’s impact in the following areas:

  • The safety of employees, workers and the public
  • The environment, wildlife and vegetation
  • Navigation in the Seaway Channel, the continuity of operations and integrity of the infrastructures and the use of pleasure craft on the River
  • Local and highway traffic conditions and the quality of the living environment for those living along the river
  • The integrity of the infrastructure and continuity of operations at the new Samuel-De Champlain Bridge

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