Klohn Crippen Berger (KCB) provided geotechnical and structural design services to Emil Anderson Construction for the Golden to West Portal design-build project. The work included realignment and widening of 4 km of the Trans-Canada Highway east of Golden, BC. A major detour design was required for Highway 1 to accommodate construction.
Two bridge structures were included in the project, an overpass and a wildlife overpass on Mechanically Stabilized Earth (MSE) wall abutments. Numerous design refinements to the geometrically complex overpass structure were evaluated to determine the most cost-effective solution. The final design used a trapezoidal girder shape resulting in a very elegant structure.
Three retaining walls, the largest about 13 m high, were designed on the south side of the highway. The walls were of MSE construction, with one founded on a pile supported footing to achieve the required stability.
KCB’s design role included full Quality Management for design and construction. Geotechnical work included site investigation, foundation design, wall design, rock face stabilization and pavement structure design. The rock cut is up to 40 m high; design included stability analysis and rockfall hazard assessment.