Mackenzie-King Bridge Rehabilitation, Ottawa ON

The City of Ottawa is undertaking the renewal of the Mackenzie King Bridge. The vast majority of the proposed work will take place on the roadway (above deck), within the existing footprint of the bridge. Bridge deck work generally includes: Reconfiguring of the deck to be 2-lanes of traffic with outboard cycle tracks, public realm spaces and sidewalks; Removing existing street light fixtures and installing new street lighting; Replacing existing deck drains with trench drains and adding new deck drains along sidewalk extensions; Removing existing median and reconstructing a new median; Constructing new sidewalk extensions and curbs; Replacing asphalt and waterproofing on bridge deck; Localized recoating of selected structural steel members; Expansion joint repairs and carrying out localized concrete repairs on the deck top.
The scope of work also includes the installation of temporary scaffolding and platforms on the underside of the structure that crosses the Canal and adjacent pedestrian walkways to enable access for minor localized concrete repairs. Full navigational width of the Canal would be maintained while a reduction in vertical clearance from 8.5m to 6.7m would be required; the reduction of vertical clearance is consistent with the lowest fixed clearance of any structure along the Canal. Pedestrian access would be maintained on the adjacent walkways. Minor localized concrete repairs over the Canal will include the use of pneumatic tools or saws to chip and cut away loose or damaged concrete. Galvanized, welded wire fabric (WWF) would be installed at the site of the repair for reinforcement and patched with concrete. All work to the complete the repairs on the underside of the bridge would be done by hand. Minor impacts to the viewscape of the Canal will occur during construction.
The project will involve the implementation of various mitigations, and federal advice, that safeguards the environment, and socio-economic and human health aspects in the project area.
The proposed project will undergo a federal Impact Assessment (IA) which is being jointly prepared/reviewed by the Parks Canada Agency (PCA) and Transport Canada (TC) due to federal land and permit from PCA and a permit from TC.

Latest update

December 31, 2021 – The public comment period on the project is closed. Parks 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.


Key documents


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

    • Bridges
  • Assessment Status

    In progress
  • Start Date

  • Proponent

    Parks Canada
  • Authorities

    • Parks Canada Agency
    • Transport Canada
  • 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
Date modified: