Cleaning the Saint-Ours dam intake tunnel

Parks Canada is responsible for regulating the water level of the Richelieu River to ensure navigation, water supply, bank protection and public safety in the event of flooding. This is achieved by means of gates in the Saint-Ours dam sector, which are operated by water pressure from the inlet tunnel. Since 2007, however, contaminated sediment has accumulated in the intake tunnel, putting the dam's gates at risk. The Québec Waterways unit therefore wishes to carry out clean-up work, removing the sediment and ensuring its management, since critical habitat for the copper redhorse (a species at risk) has been identified just downstream of the dam.


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.


Latest update

September 8, 2023 – Parks Canada and Fisheries and Oceans Canada intend to make a determination regarding whether the carrying out of the project is likely to cause significant adverse environmental effects. To help inform this determination, Parks Canada and Fisheries and Oceans Canada are inviting public comments until October 8, 2023 respecting that determination.


Key documents


Saint-Ours Canal National Historic Site
2930 Chemin des Patriotes
Saint-Ours, Quebec J0G 1P0
Telephone: 450-447-4832

  • Location

    • Saint-Ours Canal National Historic Site of Canada (Quebec)
  • Nature of Activity

    • Dams and reservoirs
    • Maintenance activities (fences, walls)
  • Assessment Status

    In progress
  • Start Date

  • Proponent

    Parks Canada
  • Authorities

    • Fisheries and Oceans Canada
    • Parks Canada Agency
  • Assessment Type

    Project on federal lands
  • Reference Number


Nearby assessments

...within 200 kilometres
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