200 Year Flood Plain

Freshet flood elevations are determined by engineering studies that consider climate cycles, flows and local river constraints. Flood ice jams consider these factors and historical freeze up events and river thermal performance. Once that has been determined, the City adopts a Flood Plain Bylaw which defines the levels of the 200 year flood plain. After new data is collected the bylaw can be updated and that process includes public consultation opportunities. The long term study will assist in determining the appropriate elevation levels and then the regulations can be updated.

Construction along rivers is very common. There is currently a 200 Year Flood Plain Policy in the Official Community Plan and a Flood Plain Regulation Bylaw that establishes flood levels and set backs for buildings and structures. Building Permits are issued by the City on a case by case basis. People may maintain buildings that have been built prior to the regulation coming into effect. Any risk of flooding is discussed with a developer at the time of building.

Houses will be built to the current 200 year flood plain level. Homeowners need to be aware of that and consider issues of insurance and assessments when building new structures in areas that may be susceptible to flooding events.

Flood Plain Map with Floodwalls

Orange lines are Gabion diking.