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News » Canada » Contract awarded for twin bridge over Highway 1 » published 5 May 2017

Contract awarded for twin bridge over Highway 1

The contractor has been appointed for the twinning of a bridge to provide extra capacity over Highway 1 in Langley, British Columbia.

Eurovia British Columbia has been selected to build the bridge following a bidding process that closed on 20 April. The bridge has been designed by McElhanney for the Township of Langley, which is procured the project through a design-bid-build scheme. As the prime consultant, McElhanney is responsible for both the conceptual and detailed design, preparation of tender documents and services during construction.

The bridge is being built as part of the 208 Street Overpass Widening project, which involves the widening of 208 Street between 84th Avenue on the south and 87th Avenue on the north to create four lanes of roadway traffic, an updated cycling plan, and pedestrian sidewalks in both directions.

As part of the work, the existing 18-year-old two-lane two-span bridge over TransCanada Highway 1 will be twinned with a new structure to provide the extra capacity.

The new bridge will carry two southbound traffic lanes, as well as a bike lane and a sidewalk.

Site challenges for the bridge construction include the modification of abutment seats and west overhang of the existing bridge to accommodate new lane configurations and the new bridge structure. Other challenges include maintaining current traffic flows during construction, the seismic upgrading of the existing bridge substructure, and designing the new structure to the recently updated 2014 Bridge Code seismic provisions.

The new structure is a precast prestressed concrete girder bridge, identical in span configuration (two 45 m spans) and depth to the existing northbound structure. The central pier is integral with the deck and the main girders, which are made continuous by this integral connection. Evaluation was carried out to compare various superstructure options, including steel girders, but it was the precast prestressed concrete NU-Girders that were chosen as they provide the best value.  

The project is scheduled for completion in April 2018.

 

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This article was published on 5 May 2017 (last updated on 5 May 2017).

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