The Port Mann Bridge is a three span steel tied arch with orthotropic deck originally carrying four lanes, now carrying five lanes of TransCanada Highway traffic across the Fraser River, with approach spans of three steel plate girders and concrete deck.

The total length, including approach spans, is 2093 m (6867 ft.) with a main span of 366 m (1200 ft.) and two side spans of 110 m (360 ft.). 

Buckland & Taylor's Scope of Work:

Seismic Retrofit

In 1994, Buckland & Taylor, in conjunction with Geomatrix Inc. of San Francisco and MacLeod Geotechnical of North Vancouver, performed a seismic evaluation and prepared recommendations for the bridge retrofit. This work included:

• Liquefaction and ground movement assessment
• Dynamic testing of the main span and south approach span
• Dynamic analysis for multiple earthquake time histories
• Push-over analysis for typical concrete bents
• Preparation of retrofit recommendations

In 2001, Buckland & Taylor completed the design and preparation of tender documents. Due to budget restraints, the construction of the retrofit has been put on hold by the Owner.

Widening from 4 to 5 lanes

In 1998, Buckland & Taylor evaluated various options, including adding lanes or twinning, during a study of ways to increase the capacity of the bridge. In 2000, Buckland & Taylor designed the 5 lane widening, which was constructed in 2001.

Fatigue Mitigation

In 1998, 2002 and again in 2005, Buckland & Taylor investigated fatigue mitigation options for the approach span girders.