In progress Environmental assessment

Cooksville Creek Erosion Control from Mississauga Valley Boulevard to the CP Railway

The City of Mississauga is undertaking a Schedule B Class Environmental Assessment Study for erosion control and restoration of Cooksville Creek from Mississauga Valley Boulevard to the CP Railway.

Project overview

Cooksville Creek originates in the industrial lands north of Highway 403 before flowing through the study area and ultimately discharging to Lake Ontario. The study area, which spans 360 metres, begins 100 metres upstream of Mississauga Valley Boulevard and continues downstream to the CP Railway crossing.

An overhead view of the Cooksville Creek and surrounding residential neighbourhoods with the study area indicated in blue.

The channel and gabion baskets (steel cages filled with stones or other materials used along rivers or streams for erosion control) are no longer functioning as designed, posing a risk to infrastructure and the environment. Erosion has led to some of the following impacts: slumping of gabion banks; elevated storm sewer outfalls; and accumulation of sediment and debris.

Through the City’s ongoing erosion monitoring program, this section of Cooksville Creek has been identified as requiring rehabilitation.


The main goal of this project is to mitigate the existing erosion problems and ensure long-term stability of the creek using natural design techniques, where feasible, while also protecting or enhancing the existing environment within the study area.


  • Improve the stability and environmental health of the watercourse
  • Maintain or improve the hydraulic capacity of the creek, and protects nearby property and infrastructure
  • Improve fish habitat and fish passage
  • Provide an opportunity for the planting of native species, and enhancing wildlife habitat where feasible

Public engagement

Online Public Information Centre

Consultation is an important part of the Municipal Class Environmental Assessment (MCEA) process and we want to hear from you. A Public Information Centre presents information related to the study and allows an opportunity for residents and stakeholders to provide input.

A presentation has been developed to present the study findings, alternative solutions considered, the evaluation process, and next steps. The presentation and comment form are available below. Provide your input and/or submit your comment form by June 30, 2023.

If you have any questions or comments regarding the project, or would like to be placed on the project mailing list, please contact:

Elizabeth Dollimore, P.Eng., MBA – Project Manager
City of Mississauga
905-615-3200 ext. 5303

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