The Government of the Yukon hired Ausenco Sandwell for the detailed design of seismic and strengthening retrofits, and widening of the existing Teslin River Bridge. The Teslin River Bridge is located on the Alaska Highway approximately halfway between Watson Lake and Whitehorse. Built during World War II, the bridge deck required replacement and widening, and the trusses required strengthening to carry CL 625 highway loading. The bridge, which was originally designed for gravity loads, also required seismic retrofitting. Base isolation bearings were installed to reduce the seismic shears on the piers. Pendulum base isolation bearings were selected since they perform well in the very low temperatures typical to the region. The seismic retrofit of the bridge and strengthening of the trusses was completed in 2005. In 2006 construction started to remove the existing bridge deck and replace it with a wider cast-in-place concrete deck.

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