As the only continuous north-south interstate on the West Coast between Mexico and Canada, I-5 is a vital trade route for regional, national and international economies. With one span now over 100 years old, it is at risk for collapse in the event of a major earthquake and no longer satisfies the needs of modern commerce and travel.
Operating and maintaining these aging structures costs around $1.2 million each year, split evenly between ODOT and WSDOT. Larger maintenance projects to keep the Interstate Bridge in service are expected to cost over $280 million through the year 2040, not including seismic retrofit. Replacing the aging Interstate Bridge across the Columbia River with a modern, seismically resilient, multimodal structure that provides improved mobility for people, goods and services is a high priority for Oregon and Washington.
What to expect
Project construction has not started and travelers should not expect to see any construction-related delays. The IBR program is committed to promoting the best ways to minimize, avoid, and mitigate the impacts of replacing and operating this key connection within our community.