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Notice of Completion: Humber Flats Stormwater Management Facility Environmental Assessment

The City of Richmond Hill has completed a study to determine the best way to rehabilitate the Humber Flats Stormwater Management Facility and reduce the number of residential properties in the Regional floodplain.

The study area is shown in the map and services the surrounding residential subdivision.

The preferred solution includes the following:

  • Replace the existing 2.4m wide x 1.8m high concrete culvert under Humberland Drive with three 3.0m wide x 2.1m high concrete box culverts

  • Clean out the sediment, and deepen and expand the existing wet pond to provide enhanced quality treatment of stormwater runoff

  • Minor regrading works to decommission the existing filter pads in the valleylands 

Detailed design of this project is expected to start in 2025.

A Project File Report outlining findings and recommendations is available for public review and comment at until April 26, 2024.

Any outstanding concerns can be directed to:

Jowell Liang, P.Eng.

Project Manager, Water Resources

City of Richmond Hill

225 East Beaver Creek

Richmond Hill, ON L4B 3P4




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