The project to replace the existing I-5 Interstate bridge linking Portland and Oregon in the US is now expected to cost up to $15 billion. The Federal Highway Administration (FHWA) and Federal Transit Administration (FTA) have completed their environmental review of the project. And the way is open for the project to commence. Federal funding worth $5.7 billion has been secured for the project.
Washington State Department of Transportation and Oregon Department of Transportation are working together closely on the project. The two are moving ahead with the tender process to select contractors for design and construction. The tender process will start in 2027 with construction of the bridge and the tolling systems to commence in 2028. The two state bodies are securing the necessary permits needed for the project. Spanning the Columbia River, the new I-5 bridge project will also include links to SR 14 and Hayden Island.
New bridge needed
The work is needed as the existing crossing is considered vulnerable to earthquakes and no longer meets requirements in terms of capacity and safety. The lanes are too narrow, it has no emergency lanes and sightlines are poor, as well as not meeting various other current safety requirements.
The current Northbound bridge opened in 1917, with the Southbound bridge opening in 1958, becoming I-5. Both bridge structure are close to the end of their operational use. The new dual replacement bridge will be designed to be earthquake-resistant. It will offer additional capacity and improved safety levels for users. And the new dual bridge crossing will feature provision for pedestrians and cyclists as well as having the potential of light rail links being added in the future.
