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The floodline is the geographic limit of the floodplain. Within CLOCA, the floodplain for river or stream valley systems is defined as the area which would be inundated by the greater flood event resulting from either Hurricane Hazel or the 100 year frequency based event. Within CLOCA the regulatory storm is the Hurricane Hazel event with the exception of the Pringle and Darlington Creeks where the 100 year event defines the regulatory floodplain.
Flood event line for CLOCA jurisdiction. Updated February 22, 2011 - small edit to Lynde at Halls and Kinsale T3 Updated January 28, 2011 - small edits to Corbett Creek lines at grid edges Updated August 25, 2010 to include refinement of Anderson Tributary on Lynde Updated July 14, 2010 to include Black, Harmony, Farewell Creek Floodplain Mapping Updated May 26, 2010 to reflect Bowmanville/Soper revision Updated March 25, 2010 to reflect Revision to Lynde Creek (Anderson Trib Rev) Updated Feb 8, 2010 to include Robinson Floodline. Updated July 3, 2009 to include the Bowmanville and Soper Creek Floodplain Mapping. Updated April 29, 2008 - relableling of Darlington Westside area Updated - August 17, 2007 - Added remaining FDRP Lake Ontario Flood & Erosion Mapping for Oshawa Harbor Updated July 4, 2007 - Updated Oshawa Harbour FPM Updated May 30, 2007 - Updates to the Oshawa Harbour Floodline Updated May 28, 2007 - Add Corbett Creek Map Sheet 16 Updated April 17, 2007 - Add Oshawa Harbour Floodline
Drainage lines were obtained from First Base Solution and were further modified and updated to reflect recent changes due to changing developments.