A Stormwater Management Report (SWM) is a critical part of the planning and development process in Ontario. It outlines how your project will manage rainfall and surface runoff to prevent flooding, erosion, and impacts on surrounding properties and municipal infrastructure. Most municipalities require this report as part of development applications, especially for severances, site plan approvals, or larger subdivisions.
At Reliance Engineering, we prepare stormwater reports that are both technically sound and tailored to meet municipal and conservation authority requirements. Our reports typically include pre- and post-development drainage analysis, runoff calculations, flow control strategies, and Low Impact Development (LID) solutions such as infiltration galleries, bioswales, or permeable surfaces.
We use recognized modeling tools to simulate storm events and ensure that your development won’t increase the burden on the local storm system. Whether your site discharges to a municipal sewer, open ditch, or natural watercourse, our team ensures compliance with current engineering standards and environmental regulations.
Our experience working with jurisdictions across Ontario means we understand what reviewers are looking for — and we know how to get your report approved with minimal revisions or delays.
