Large industrial sites require stormwater systems that are robust, constructible, approvable, and cost-effective. Yet conventional servicing layouts can become inefficient as scale increases, leading to longer pipe runs, deeper infrastructure, larger pipe diameters, and higher material, installation, and grading costs.
A recent stormwater Design Optimization for a large industrial site in Caledon delivered significant infrastructure cost savings – without compromising performance, approvals, or stormwater management objectives. The result shows how disciplined engineering review can create measurable value on large-format industrial developments.
An example of this design was used within the Tullamore Industrial Subdivision, Block 4, Building D, where Crozier undertook a Design Optimization review to determine whether the original storm drainage approach could be improved while maintaining performance.
The initial concept followed a conventional single-outlet storm sewer approach. That strategy is often effective on smaller sites because it minimizes municipal connections and can limit water quality controls to one location. On a large-format industrial site, however, the same assumptions can create unnecessary cost as drainage areas, pipe lengths, depths, and pipe sizes increase.
The project team challenged the default approach and asked whether the system could achieve the same technical outcomes more efficiently. The conclusion was clear: for a site of this scale, the single-outlet solution was no longer the most effective option.
Crozier advanced a revised two-outlet storm sewer configuration, splitting the system into smaller, looped drainage networks.
This optimization reduced pipe lengths, diameters, and installation depths. This optimized design reduced the demand for separate stormwater storage infrastructure and enabled more efficient pipe sizing and material selection. Importantly, it preserved the intent of the original servicing strategy while improving constructability and reducing cost.
This case study also reflects a broader market shift. While speed dominated much of the past decade’s activity, many industrial clients are now placing renewed emphasis on capital efficiency, optimized building footprints, and reduced infrastructure costs.
Design Optimization creates the space to respond to that shift. By pausing the design cycle, revisiting assumptions, and evaluating alternatives, project teams can reduce cost while maintaining technical integrity, approval confidence, and long-term performance.
This disciplined review resulted in a more efficient and cost-effective stormwater solution.
This outcome highlights the importance of combining sound engineering judgment with commercial perspective to achieve stronger project outcomes. Crozier helps clients look beyond standard approaches to find smarter ways to design and deliver complex industrial developments. By challenging assumptions and aligning technical decisions with project objectives, we help reduce cost, manage risk, and create lasting value.
Written by:
Jim Firth, P.Eng.
Vice President, Crozier
About Choice Caledon Business ParkÂ
Developed by Rice Commercial Group, the Business Park was created as an industrial subdivision consisting of warehousing, distribution centres, and industrial uses. The area is projected to be completed in 2026.
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