Rock Armour: Solid Climate Defense for Lake Ontario

Housing, Infrastructure and Communities Canada

To improve safety and resiliency, the federal government and the Town of Cobourg are investing $19.5 million to rebuild the Cobourg Harbour breakwaters and Monk's Cove Park seawall.

The accelerating impacts of climate change mean that the aging harbour in Cobourg is at higher risk of shoreline erosion and flooding. Work to update the breakwaters will include removing the concrete cap and replacing it with limestone below the waterline and granite above the waterline. The new rock armour will weather wave action and storm surges for decades. An upgraded double layer seawall at Monk's Cove Park will make the structure more resilient and reduce the displacement of rip rap stones. Any limestone and granite used in the project will be sourced from within a 100 km radius, with old stone being used where possible to reduce waste.

Cobourg's historic harbour and shoreline protects roadways, residences, parkland, and the community from flooding and contributes to recreational tourism and economic development. It is also a base for search and rescue services for the Canadian Coast Guard. This investment will help to ensure the Cobourg remains a safe, vibrant and resilient place for residents and businesses for years to come.

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