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Chedoke Creek Spill Remediation at Cootes Paradise

October 29, 2021

In July 2018, the City of Hamilton informed the public that one of its combined sewer overflow tanks had discharged 24-billion litres of sewage and stormwater spill into Chedoke Creek and subsequently Cootes Paradise wetland over a period of four years.

Following a Provincial Order, the city worked with the Ministry of the Environment, Conservation and Parks (MECP) to investigate the incident, and plan for remediation efforts in the Creek and Cootes Paradise. The City then submitted a workplan to the MECP that defined remediation/mitigation method to offset damage from the spill and the added nutrient loading to Cootes Paradise and the Western Hamilton Harbour Area.

RBG collaborated with the City of Hamilton on the draft framework (Chedoke Creek Water Quality Improvement Framework) of the plan that was approved by MECP in August 2021 with a deadline to complete remediation work by the end of 2022.

RBG is pleased with the approved plan and the focus being placed on remediation to the Chedoke Watershed and subsequently, Cootes Paradise and adjacent west Hamilton Harbour. We look forward to the next steps in remediation and fully support the City of Hamilton in implementing these solutions to long-term health effects of Cootes Paradise and the overall watershed.

RBG will be working collaboratively with the City of Hamilton to facilitate onsite short-term spill remediation activities, including localized targeted dredge works, and temporary floating wetlands to remove a portion of the total spill affecting lower Chedoke Creek, and Cootes Paradise Marsh.

To learn more about remediation efforts in Chedoke Creek visit

Conservation at RBG

It is our mandate and challenge to protect these lands as an ecological legacy for future generations by balancing the needs of wildlife with more than +400,000 visitors who walk our trails each year.

RBG’s conservation efforts occur in forest, wetland and prairie habitats and range from species at risk inventories to invasive alien species management.