Sauvie Island Bridge Replacement

Portland, Oregon: Replacement of the the only bridge on/off Sauvie Island. A very complex marine/transportation project, and winner of an AGC of America Build America Award.

Project Details

The new Sauvie Island Bridge consists of box girder approach structures built from the mainland and island sides. Temporary work bridges were used to facilitate construction of both spans. In order to accelerate construction and meet tight environmental compliance work windows, piling for the work bridges were driven both from shore and from barges in the channel. The center span of the new bridge is a steel arch structure 360 feet in length and weighing over 1500 tons.

Project specs

  • Location: Portland, Oregon
  • Owner: Multnomah County
  • Timeframe: 2006-2009
  • Size: $37.9 Million
  • The center arch span was constructed off-site at the Port of Portland, skidded onto a barge, and lifted approximately 80 feet in the air. In this elevated position, it was transported down-river, and then lowered into place on the approach spans.


  • AGC of America Build America Award