A Bridge to Connect the Future:

The Pont des Piles Project

In the heart of the Mauricie region, a major construction project has reshaped the landscape: the replacement of the Pont des Piles. Spanning the majestic Saint-Maurice River, this initiative aimed to build a new arch structure, symbolizing modernity and sustainability. Commissioned by the Ministry of Transportation and Sustainable Mobility, the project reflects a clear objective: to improve traffic flow while ensuring user safety.

Pomerleau, renowned for its expertise in complex structures and bridge construction, was selected through a public tender to take on this challenge. With its mastery of sensitive environments and know-how in long-span bridge construction, the company mobilized specialized human and technical resources to deliver infrastructure that meets the region’s ambitions.

Challenges as Grand as the Arch

A Steel Arch with Major Technical Challenges

The steel arch, with an impressive span of 180 meters, is a true technical feat. Its segmental assembly and millimeter-precise closure at the center required extreme precision. Each stage of the assembly was meticulously planned to ensure the structure’s stability and safety.

A Constrained and Strategic Worksite

The construction took place in a restricted environment with limited maneuvering space. Part of the work was carried out directly on the river, requiring specialized marine equipment. Temperature variations, which also affect the structure’s behavior, forced teams to continuously monitor movements and thermal stresses.

Heavy Lifting and Assembly of the Bridge Arch

The bridge arch consists of 2 × 13 segments for the arches, along with other secondary elements, totaling 38 pieces—some weighing up to 65 tonnes. Transported by truck to a temporary dock on the riverbank, these components were erected using 150- and 300-tonne cranes.

To accomplish this feat, Pomerleau deployed temporary towers and stay cables, showcasing its expertise in heavy lifting and complex structural assembly. The site also involved specialized teams in blasting, earthworks, and marine operations, all supported by the company’s equipment and technical bases. This precise orchestration ensured safe and efficient execution.

Discover our expertise in marine works, formwork, and earthworks.

Environmental Measures on the Saint-Maurice River

Working above the Saint-Maurice River—a popular spot for boaters—required constant environmental vigilance. Although risks were well managed, Pomerleau implemented a series of rigorous measures to protect the ecosystem. Turbidity curtains were installed over approximately 200 meters on each bank to limit sediment dispersion. Sediment barriers, straw bales, and absorbent booms were deployed to prevent contamination. Each work area, including operator cabins, was equipped with spill kits ready for immediate response. Finally, SEG permits were obtained to allow safe relocation of local wildlife, including snakes, turtles, and fish. These concrete actions demonstrate Pomerleau’s commitment to upholding the highest environmental standards while ensuring smooth project progress.

A Project That Combines Innovation, Precision, and Respect for the Land

The replacement of the Pont des Piles is more than just an engineering achievement—it represents the union of technical performance, environmental awareness, and community commitment. By combining expertise, innovation, and respect for sensitive environments, Pomerleau has helped build sustainable infrastructure designed for future generations and rooted in the Mauricie region.