Magog Wastewater Treatment Plant
Project summary
We are proud to have completed the second phase of the most important infrastructure project in Magog: the centralization of wastewater treatment plant on Hatley Street. This strategic phase aims to increase the treatment capacity of the central plant in response to population growth and urban development in the region.
In this phase, we expanded the plant to increase its treatment capacity from 15,000 to 24,000 m³/day, added treatment equipment while maintaining the activated sludge process, and coordinated with previous phases to ensure a smooth and safe transition of operations.
At Construction Longer, we put our expertise to work on sustainable, innovative, and transformative projects. Our team delivered the STEP Lot 1b project one month ahead of schedule, at a very competitive price, and with high-quality workmanship, in compliance with environmental standards and the expectations of the City and its citizens.
Activity sector
Civil Works
Budget
20M$ to 50M$
Surface area
19 643 ft2
Schedule
± 84 Weeks
Realisation date
2025
Challenge #1
Working in the heart of an operational plant is a challenge in itself. We faced an engineering and coordination challenge. We had to expand and modernize a wastewater treatment plant while maintaining its critical operations continuously. We combined rigor, creativity, and collaboration to deliver this complex project without compromising the essential service of wastewater treatment..
To achieve this during the day, we planned targeted shutdowns to work on key equipment without interrupting the overall process and temporarily diverted wastewater flows using bypass pipes. However, we carried out an exceptional night-time operation to temporarily divert all of the city’s wastewater, enabling a major planned shutdown!
This success is based on careful planning, constant communication with city operators, the involvement of specialized subcontractors, and the adoption of innovative working methods. Thanks to this synergy, we have been able to deliver high-quality work that complies with standards, deadlines, and environmental requirements.
Challenge #2
As part of this expansion, Construction Longer had to deal with complex concrete structures in a confined space and with equipment in operation. Among the challenges encountered were the creation of precise circular formwork, the use of specialized materials to ensure waterproofing and durability, working in confined spaces with limited access, pouring concrete on slopes and in cold weather, and meeting tight tolerances for the installation of process equipment.
To meet these challenges, a specialized formwork team was mobilized, with the support of prefabricated custom formwork to optimize precision and deadlines. A retractable shelter was installed to protect the concrete pouring areas, and a close partnership with suppliers ensured control over technical materials. Finally, 3D modeling of the formwork sequences ensured efficient work planning.
