Project category

Energy

Location

Alma, Quebec

Customer

Rio Tinto Alcan inc.

Year

2025-2032

Additional informations

Modernization work is currently underway at the Isle-Maligne Generating Station, located in Alma. These works are intended to ensure the long-term durability of the infrastructure and optimize the performance and reliability of the hydroelectric generating facilities.

The project includes

• Replacement of butterfly valves;
• Refurbishment of turbine-generator units #2 and #7, including the complete replacement of the turbine-generator assembly (TGA);
• Major rehabilitation of the hydraulic passages and water intake structures;
• Various related projects aimed at improving the performance, reliability, and long-term durability of the generating station facilities.

Specialized work at the generating station

• Fabrication and installation of temporary cofferdams in front of the piers;
• Dismantling and repair of concrete sluiceways Nos. 4 through 12;
• Fabrication and installation of new embedded steel components;
• Targeted repairs of deteriorated concrete in areas identified by the client;
• Rehabilitation of downstream gate grooves;
• Optional: dismantling of turbine-generator assemblies (TGAs).