Yale Creek Bridge Replacement

BASIS were the Prime Consultant for the bridge replacement and highway realignment on Highway 1 in Yale, at the south end of the Fraser Canyon. BASIS managed the design and provided structural engineering and geotechnical engineering services. Roadway, drainage, hydrotechnical, and electrical engineering provided by subconsultants. The project required replacing an aging three-span steel bridge with a new 28 m long single-span bridge.

The new bridge is founded on open-ended steel pipe piles, and the superstructure consists of precast concrete box stringers. The roadway design was adjusted to provide safer geometrics, and the vertical profile was raised approximately 5m at the creek site to increase hydraulic clearance under the new bridge. This allowed for future expected debris flood events to pass below the bridge. Complex staging to maintain single-lane alternating traffic on Highway 1 required two-stage demolition of the existing bridge, as well as two-stage construction of the new bridge.  The old foundations were removed from the river, reducing the environmental impact of the bridge and improving the flow of the creek. The final construction contract price was significantly lower than the schematic design cost estimate, demonstrating BASIS’s commitment to design efficiency.

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