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12 Street S.E. Bridge Replacement Project

Project update - October 2018

Important dates:

October 17 - 26

  • Piling work will take place on the south side of the bridge, to install sixteen piles which will support the commemoration structure and future public art.
  • This work will involve drilling and vibrating, and will result in minor noise impacts to the surrounding areas.
  • As these piles are much smaller than those done for the bridge, smaller equipment will be used.
  • Construction work is dependent on weather and other conditions, so dates may change without notice.

Watch for:

  • Pathway closures and detours will be required to help complete the work. Detours will be signed, and at least one pathway connection between 12 Street S.E. and the Bow River Pathway will remain open during construction.
  • Temporary road closures or detours may be required to move equipment and materials on and off site throughout construction.

The interactive pathways and bikeways web map and app are kept up-to-date with pathway detours and closures.


Project background

The 12 Street S.E. Bridge that spans the Bow River on the south side of St. George's Island needed replacement due to its age and deteriorated physical condition. The bridge, constructed in 1908, was originally designed to carry horse and buggy, as well as pedestrian traffic to St. George's Island. The old bridge provided an important link for vehicles and people on foot or bikes, and provided access to and from 9 Avenue S.E. to Memorial Drive. The new bridge will ensure this important link is maintained for the next 100 years.

Project scope

The new bridge:

  • Provides two lanes for vehicle traffic with adequate lane widths, which can accommodate emergency vehicles and future Transit, and increase safety generally.
  • Is flood resistant.
  • Provides pedestrian/cycling access across the bridge and connects to the existing pathways on the north and south ends of the bridge.
  • Is easier to maintain and will last for a long period of time (100 years).
  • Will incorporate an historical/commemorative component recognizing the old bridge design.
  • Continues to provide access into the Zoo's Administration area parking lot and building.


$26 million


As part of the project, grass and other vegetation will be planted around the north and south ends of the bridge. It will also include the installation of a commemorative structure for the old St. George's Island Bridge. To see what the landscaping will look like, please see the landscape plan.

Photo Gallery - Unclassified

  • 12 Street Bridge - South landscape layout
  • 12 Street Bridge - Northwest landscape layout
  • 12 Street Bridge - Northeast landscape layout

While landscape work is underway dust control measures will be in place to reduce the impacts of dust on adjacent properties.

No tree removals are anticipated as part of the landscape work.


Public Art

A project-specific public art selection panel selected artist Brandon Vickerd for the development and execution of a permanent public art project adjacent to the new 12 Street S.E. Bridge.


  • Preliminary design - fall 2015
  • Detailed design - winter 2016
  • Construction - spring 2016
  • Bridge open to the public - winter 2017
  • Landscape work - summer/fall 2018
  • Completion - fall 2018*
*Construction is dependent on weather and site conditions. More information will be provided on updated timelines, but please be aware that dates may change.


The City of Calgary will communicate with the public and impacted businesses about the construction before it begins and on an ongoing basis throughout construction. The web page will be the primary source for updated information.

More information

Please fill out the online form if you have questions or require more information.

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