Installation of Downstream Stop-Log Gains Sault Ste. Marie Canal National Historic Site

In the fall of 2023, it was identified that the historic winter guard gates at the downstream end of the Sault Ste. Marie Canal were no longer viable for use and will remain in place until repair/restoration is considered. These gates were previously used for unwatering purposes to inspect, maintain, and repair parts of the lock chamber. A new set of galvanized steel gains will be installed for stop-logs to be used at the downstream end of the lock chamber and will support the unwatering needs on site. Having the ability to unwater the Sault Ste. Marie Canal by Parks Canada staff will ensure passage through the navigation lock, improve operational requirements and asset management, while enhancing visitor experience and ultimately protect the cultural resources for which this National Historic Site is designated. Project activities include hoisting the individual gains with heavy equipment/machinery on previously disturbed ground for an in-water dive team to drill and mount both gains (n=2) on the concrete walls between the lower lock gates and winter guard gates.

Latest update

March 13, 2024 – The public comment period on the project is closed. Parks Canada is considering comments received to help inform its determination on whether the carrying out of the project is likely to cause significant adverse environmental effects.


Key documents

Key documents
Document Number Document Title File Date
1 New project being assessed by Parks Canada - Public comments invited from February 12 to March 13, 2024 - February 12, 2024


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

    • Parks Canada Agency
  • Assessment Type

    Project on federal lands
  • Reference Number


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.


Nearby assessments

...within 200 kilometres
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