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The Southeast Stoney Trail Highway is a major transportation project that improved mobility across Calgary by completing a critical section of the city's ring road. The new highway enhances regional connectivity, reduces travel times, and provides a more efficient route for commuters, commercial vehicles, and goods moving throughout southern Alberta.

ACCIONA, as part of Chinook Roads Partnership, delivered the project through a public-private partnership that included the design, construction, financing, operation, and maintenance of approximately 37 kilometres of six-lane highway. The project also included the construction of 27 bridge structures, 11 interchanges, and approximately three kilometres of pedestrian pathways, creating a modern transportation corridor designed to support the region's long-term growth.

The scale and complexity of the project required extensive planning and coordination to deliver major earthworks, paving, bridge construction, and utility infrastructure while maintaining traffic on existing roadways. Construction was carried out within environmentally sensitive areas and incorporated innovative construction practices that optimized material use, minimized disruption, and protected surrounding ecosystems throughout the project.

The Southeast Stoney Trail Highway has become a vital component of Calgary's transportation network, providing safer, more efficient travel while strengthening regional connectivity and supporting long-term economic growth. Sustainable construction practices, including the reuse of approximately 12.4 million m³ of excavation material, minimized the project's environmental footprint, while new grade-separated interchanges improve traffic flow, reduce vehicle idling, and enhance the efficient movement of commuters, commercial vehicles, and goods throughout southern Alberta.

GENERAL PROJECT INFORMATION

  • Client: Alberta Transportation
  • Location: Calgary, Alberta
  • Contract Type: Design-Build-Finance-Operate-Maintain (DBFOM)
  • Contract Value: $769 million
  • Project Team: Chinook Roads Partnership – ACCIONA, Bilfinger Berger (AtkinsRealis), and Alberta Highway Services
  • Project Status: Completed in 2013

PROJECT SCOPE

  • Approximately 37 km of new six-lane highway
  • Construction of 27 bridge structures
  • Construction of 11 grade-separated interchanges
  • Approximately 3 km of pedestrian pathways
  • Design, construction, financing, operation and maintenance under a DBFOM model
  • Placement of approximately 42,000 m³ of structural concrete and 6,000 tonnes of reinforcing Steel

INNOVATION & SUSTAINABILITY

The Southeast Stoney Trail Highway incorporated several innovative construction practices to improve sustainability and reduce the project's environmental footprint. Approximately 12.4 million m³ of excavation material was reused on site, minimizing material transportation, reducing fuel consumption, and lowering greenhouse gas emissions.

The project also introduced grade-separated interchanges to improve traffic flow and reduce vehicle idling, particularly for commercial transport. Careful planning enabled construction to proceed safely alongside active roadways while protecting environmentally sensitive areas and optimizing construction sequencing.

A number of innovative practices were used at the South East Stoney Trail Project to reduce the carbon footprint of the road construction and increase the sustainability of new road infrastructure. 

For example, all earth-moving material will be sourced on site, with a total of 12.4 million m3 of excavation to be used as landfill. In addition, existing junctions will become grade-separated interchanges without signals, which will increase the free flow of traffic by significantly reducing engine idling, especially in heavy diesel lorries. Our sustainable construction practices reduce the movement of goods to and from the site, improving efficiency, reducing transportation, fuel costs and emissions, and ultimately providing a more economical solution.

The technical complexity of the project is due to:
  • Planning and coordination for the scale of earthwork and paving involved.

  • Optimize design and construction activities.

  • Work in sensitive saline wetlands and within environmental schedule restriction windows.

  • Work safely on and around existing roads.

  • Operate and maintain the existing road during construction work.
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