Description: The Ontario Regulation Limit 179/06 is mapped as the greatest extent of the Riverine Hazard Limit (Flood Plain/Meanderbelt/Slope/Apparent Valley with a 15m setback), the Shoreline Hazard Limit (wind setup/wave uprush/shoreline erosion with no setback from shoreline erosion area and a 15m setback from wind setup areas), and Wetlands (with a 120m setback from PSWs and 30m setback from all other evaluated/identified wetlands greater than 0.5 ha in area). These components have been dissolved to create an ‘all in one’ polygon showing the greatest extent of the regulation limit.Refer to “Reference Manual for Determination of Regulation Limits” (LSRCA, November 2005) for more information on determining the extent of the identified hazards.
Description: Includes evaluated Provincially Significant Wetlands (PSWs) and other evaluated and identified wetlands from the Ministry of Natural Resources. Wetlands greater than 0.5 ha within the Lake Simcoe Watershed area have been included.
Description: The floodplain shapefile is separated into two categories including engineered and estimated floodplains. The shapefile has been dissolved based on floodplain type. The floodplain delineation is based on the most conservative floodplain delineation of either the regulatory or 1:100 year return period event. The floodplain delineation presented is also known as the regulatory floodplain.
Description: Riverine Erosion Hazards due to stream bank erosion and slope stability. Hazard areas contain a 15 m setback. This layer is one of the 5 components which comprise Ontario Regulation 179/06.
Description: This Lake Shoreline Erosion limit layer is a combination of two categories of data: a set-back from areas affected solely by wind set-up and a set-back limit accounting for shoreline erosion. The shoreline erosion limit contains the area affected by wave uprush elevation and the wave uprush elevation points.