91ÊÓƵ

The Metro Council last week added three Interstate Bridge Replacement (IBR) projects to the 2024-2027 Metropolitan Transportation Improvement Program (MTIP) to meet federal project delivery requirements. The Interstate Bridge replacement project is in the design phase; construction is expected to begin next year.

The council voted 6-1 on Thursday to approve the amendment (Mary Nolan voted no). The item will next go before the Oregon Transportation Commission on July 31. The commission’s approval is required for authorization of the funding for the three projects. If the commission were to deny the amendment, the Metro Council’s decision would be considered invalid and would not be sent to the Federal Highway Administration for final approval.

The June 2025 MTIP contains three projects related to the effort to replace the Interstate Bridge and improve related interchanges. One is a modification to the I-5 Columbia River (Interstate) Bridge project and two new projects are related to tolling and the construction of the replacement bridge. The combined amendment is $1.9 billion, said Ted Leybold, Metro transportation policy director.

The I-5 Columbia River (Interstate) Bridge project contains the nonconstruction phases for the IBR program. Funding for the planning and initial preliminary engineering phase was obligated prior to development of the 2024-2027 MTIP. Planning and design are under way; the work includes right-of-way and utility relocation activities for early construction packages, as well as continuing overall program management and development work. The total MTIP programming cost has increased from $103 million to approximately $554.6 million.

One new project for pre-completion of tolling infrastructure calls for installing signage, related structures, and electrical systems in preparation of new tolling operations on and near the Interstate Bridge. The total MTIP programming cost is approximately $24.6 million.

The other new project added to the MTIP is for the replacement of the Interstate Bridge. It will advance post-NEPA (National Environmental Policy Act) design and construction activities for the new bridge over the Columbia River between Oregon and Washington, downstream of the existing structure. The work will support the construction of two new bridges to accommodate highway, transit and active transportation modes. The total MTIP programming amount is approximately $1.5 billion.

Tolling rates will be set by the Oregon Transportation Commission and the Washington State Transportation Commission. Pre-completion tolling on the Interstate Bridge is expected to start in 2027.

Ray Mabey, assistant program manager for the IBR program and the state bridge engineer for the Oregon Department of Transportation, said tolling rates will be variable depending on time of day. IBR program staffers are studying possible tolling rates; all scenarios include a discount for low-income drivers.

According to the , the total estimated project cost is from $5 billion to $7.5 billion.

Full project completion is expected to require 10 to 15 years.