Sault Ste. Marie Canal Unwatering Investigation

A section of the Sault Ste. Marie Canal Lock will be unwatered around the lock gates to investigate and assess the condition of the canal's infrastructure and functional components. This project includes maintenance work and previously identified repair needs and is required to ensure the safe and continued operation of the recreational waterway locks along the St. Mary's River. The unwatering investigation work outlined in this impact assessment will support the creation of works scheduled for major repairs in a further planned unwatering and contribute to the long-term capital asset management planning for the site.


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

October 22, 2023 – The public comment period on the project is closed. Parks Canada, Fisheries and Oceans Canada and Transport Canada are considering comments received to help inform its determination on whether the carrying out of the project is likely to cause significant adverse environmental effects.



Sault Ste. Marie Canal National Historic Site
0, Hwy 627
PO Box 212
Heron Bay, Ontario P0T 1R0

  • Location

    • Sault Ste. Marie Canal National Historic Site of Canada (Ontario)
  • Nature of Activity

    • Water Management
    • Maintenance activities (fences, walls)
  • Assessment Status

    In progress
  • Start Date

  • Proponent

    Parks Canada
  • Authorities

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

    Project on federal lands
  • Reference Number

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