The Union Water Supply System and Windsor Utilities Commission, located in southwestern Ontario, sought to enhance the resilience of their municipal water networks by establishing an interconnection that would enable uninterrupted service during emergencies. Operating as separate systems, both utilities faced vulnerabilities from infrastructure failures, pollution events, and climate-related disruptions. Rather than constructing separate backup infrastructure, the utilities are collaborating on a shared emergency strategy.
CIMA+ was retained to assess the feasibility of interconnection through three key studies:
- An operational study to evaluate system compatibility and functionality
- A reservoir size and location study to determine the most effective location and design
- A water-quality study to confirm continued safe and reliable water distribution
Through advanced modelling of options, CIMA+ identified the optimal solution: a split central reservoir with two separate storage cells and dedicated pumping for normal and emergency operations. Under normal conditions, each system would operate independently, but during emergencies, valves between the split reservoirs would be opened and alternate pumping strategies would be activated, enabling seamless interconnection of the two water systems. This approach optimizes storage, maintains pressure control, and maintains water quality while eliminating the need for costly additional treatment plants or redundant infrastructure.
The project serves as a model for municipal water security by reducing infrastructure costs and enhancing sustainability. Through sophisticated modelling, CIMA+ produced a cost-effective, technically sound solution that balances performance with resilience. Once implemented, this interconnection will strengthen water security for both communities, mitigate service disruptions, and support long-term economic and environmental stability.
Using advanced hydraulic modelling for a data-driven solution
The project used state-of-the-art hydraulic modelling for the critical evaluation of flow dynamics, pressure variations, water age, and emergency response scenarios. Simulations tested a range of configurations, revealing challenges such as pressure imbalances, water-stagnation risks, and chemical treatment differences. The optimal solution—a split central reservoir—was identified by analyzing system performance under both normal and emergency conditions. Modelling also guided the design of strategic valve sequencing, allowing a rapid transition between operational modes. Controlled water circulation and chlorine boosting strategies were refined through simulations to maintain water quality. This data-driven approach enhances resilience, optimizes infrastructure, and provides for long-term water security with minimal additional investment.
Advancing sustainability through smart water management
The project enhances sustainability by optimizing existing infrastructure rather than requiring costly new treatment plants or separate storage expansions. The split central reservoir reduces material use, minimizes energy consumption, and eliminates the need for redundant facilities. Strategic water circulation and controlled chlorine boosting reduces water age and benefits water quality in the boundary areas of both distribution systems. By improving resilience against supply disruptions and climate-related risks, the project safeguards long-term water security, supports economic growth, and promotes environmentally responsible resource management for both communities.
Next steps
An environmental assessment is now underway to obtain feedback on the alternatives from the public and all interested parties. Solution configuration, facility location and watermain routing is to be refined through the environmental assessment process in response to new information and stakeholder questions and input.