The CVRD has updated the floodplain mapping for the Cowichan and Koksilah Rivers. This mapping takes into account new modelling data as well as projected climate change and shows areas likely to be subject to flooding during a 1 in 200 year flood. Flood construction levels are shown to guide development in floodplain areas. Other recent updates to flood mapping include Shawnigan Lake and the Riverbottom Road area.
The CVRD has a Risk Tolerance Policy to guide land use and development decisions in areas where hazards may present a risk the life and safety of residents. In areas subject to hazards such as landslides, you may be required to hire an engineer or geoscientist to prepare a geohazard risk assessment for your property prior to any development. The policy is available here.