Twinning Stoney Trail

A major connection in Calgary.

The new Stoney Trail bridge over the Bow River was built approximately 30 m west of the existing bridge. The existing bridge includes four piers and an abutment at each end. Due to the high foundation loads, two bi-directional load tests were completed to assess the pile capacities. One pier is located on the south slope with slope stability issue that required a permanent 15 m high retaining wall to maintain stability during construction and long-term.

Thurber was the Engineer-of-Record (EOR) during the design and construction of both the initial and second Stoney Trail Bridge over the Bow River. The initial bridge was constructed as a design-build project, with Thurber retained by the contractor. The second bridge, which parallels the existing bridge, is a conventional design-bid-build project, with Thurber being retained by the Owner’s Engineer (Stantec).

Thurber provided geotechnical design recommendations for the foundation piles, slope stabilization measures, temporary cofferdam, retaining structures as well as provision of field inspection, materials QA testing and geotechnical instrumentation during construction.