Regulatory flood line mapping defines the 100-year storm event for lakes and rivers in the Toronto area.

Predicted high water levels and historical observations from Hurricane Hazel can be used to estimate risk.

Update Alert:

Portions of flood plain mapping are currently in “DRAFT” status and are temporarily unavailable for purchase. Check the file info on MapWarehouse to confirm the map status is “FINAL” to ensure a successful transaction.

If you’ve purchased a draft file or your file contains no data, please contact us for help.

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Floodplain Coverage Map

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Blog: To develop, or not to develop in the floodplain?

I often get calls from developers, engineers, and regular home owners looking to make a few changes to their properties. If that property is crossed by a water feature, you may need to apply for a Development, Interference with Wetlands and Alterations to Shorelines and Watercourses permit…

Who’s It For?

Regulatory flood line mapping is used to assess risk and develop mitigation strategies in populated areas vulnerable to flooding.

It informs policy makers to design city infrastructure equipped to handle overflow from major storms.

Blog: Law of the Land, The Tort Of Nuisance

Smed v. Priddis Greens Golf & Country Club, 2011. The plaintiff, the neighbour on the receiving end of the discharge, claimed damages for erosion, soil contamination, and to pay for flood mitigation on 8-9 acres of rural land. She also claimed damages…

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