Flood Plain Mapping

South Nation Conservation has completed Flood Plain Mapping for the major rivers and tributaries within its watershed. The Flood Plain Maps show the lands which are prone to flooding during the 100 year Regional Storm Event.

A 100-year flood does not mean that flood conditions will occur only once every 100 years but that flood conditions will occur on average every 100 years, and that during any one year, there is a 1% probability of occurrence.

According to the Provincial Policy Statement, development and site alteration may be permitted in a hazardous zone, except in floodways, provided that the hazard can be safely addressed, and the work is carried out in accordance to standards. Also, no new hazards or adverse environmental impacts can be created.

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