Ottawa Walls Concrete Rehabilitation, Pretoria Bridge to 417 Bridge (Interim Repairs), Rideau Canal National Historic Site

The project will involve the repair of a section of concrete wall in downtown Ottawa, part of the Rideau Canal National Historic Site, between Pretoria Bridge and the north side of the Hwy 417 (Queensway) bridge, on the Colonel By Drive (east) side of the canal. The walls were originally constructed in the 1930's. Repairs are required to maintain the navigation channel in downtown Ottawa and to ensure the safety of land based visitors using the pedestrian / cycling path adjacent to the canal wall. The section of wall in question is currently considered to be in poor condition, and after the repair will be in 'improved to good' condition. The section of canal wall exhibits concrete deterioration and cement/aggregate loss of the main wall stem below the 150mm coping cap. Concrete material loss has formed past and current voids. Two railing posts have exposed post bases and mortar deterioration.
The canal bed, the walls and strip of land adjacent to the canal are under the administration of Parks Canada. The land is leased to the National Capital Commission, who maintains the recreational pathway that runs along the length, along with the railings.
The work on the targeted section of canal wall will include surface repairs of deteriorated concrete of a 17m section of wall, and then immediately north, the replacement of (approximately) a 120m section of coping, railing and pathway asphalt. Its anticipated the work will be undertaken during the winter-spring of 2022, including during the water level drawdown period in the Ottawa reach when the canal bed adjacent to the wall will be dry. The majority of the work will be done from the top side of the wall. The only activity that will require workers to access the canal bed is to install platforms and/ or nets to prevent debris falling into the canal, and potentially erect construction fencing. Its anticipated that plywood will be placed along the base of the wall to provide a temporary work surface and provide separation from the sediment. No sediment excavation will be necessary. Terrestrial excavation behind the wall is estimated to be 0.8 m in depth.

Latest update

January 2, 2022 – 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 December 3, 2021 to January 2, 2022 - December 3, 2021


Rideau Canal National Historic Site
34 Beckwith Street South
Smiths Falls, Ontario K7A 2A8
Telephone: 613-283-5170 or 1-888-773-8888
Fax: 613-283-0677

  • Location

    • Rideau Canal National Historic Site of Canada (Ontario)
  • Nature of Activity

    • 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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