All regions of Ontario experience flooding, erosion and slope failures. These are naturally occurring processes that have been continuously shaping and reshaping the earth for thousands of years. These processes represent a "hazard" when people and structures are located within areas directly impacted by these naturally occurring processes.

The RVCA administers a regulation made under Section 28 of the Conservation Authorities Act known as Development, Interference with Wetlands and Alterations to Shorelines and Watercourses Regulation.

Note: as of April 1, 2024, Ontario Regulation 41/24: Prohibited Activities, Exemptions and Permits will replace the RVCA's existing Ontario Regulation 174/06 under Section 28 of the Conservation Authorities Act.

This regulation allows RVCA to ensure that proposed developments have regard for natural features in order to:

• prevent loss of life;
• minimize property damage and social disruptions;
• reduce public and private expenditures related to emergency operations, evacuations and restoration;
• minimize the hazards associated with development in floodplains and areas which are susceptible to erosion, which in future years may require expensive protective measures.