Skip Top NavigationSkip to Content

Columbia River I-5 Bridge

Columbia River I-5 Bridge Planning Inventory

Washington Legislature passed Substitute Senate Bill 5806 (pdf) during its 2017 session. This bill directed the Washington State Department of Transportation to inventory and document existing data related to the construction of a new Interstate 5 bridge over the Columbia River. WSDOT was tasked with delivering a report of this information by December 1, 2017.

The report, referenced documents and a repository of related documents from project development are provided on this site. The report details the comprehensive, broad based processes that identified the need, reviewed options and selected a preferred alternative for Interstate 5 improvements over the Columbia River and in surrounding segments. Additionally, the report summarizes the extensive technical work completed within the environmental process and in support of key permits.

Key Documents Referenced in Report

Long range planning
Supporting documents from regional transportation study and analysis that identified various improvements needed on I-5 in the Portland-Vancouver metro area.

Context constraints
Items documenting initial understanding of the problem and expectations for the Columbia River Crossing project, including the purpose and need identifying six problems to address: congestion, safety, seismic vulnerability, poor transit reliability, substandard bicycle and pedestrian facilities and impaired freight movement.

Analysis and project development efforts related to the funding and financing of the Columbia River Crossing project, including the investment grade traffic and toll revenue analysis.

Project management
Documents detailing coordination and meetings with partner agencies and stakeholder groups.

Project development
Documents addressing alternative development and screening, conceptual design and preliminary engineering, environmental process and permitting, external reviews, FTA New Starts and public involvement.

Project delivery
Details of the various contract procurement methods considered for the different phases of the project.

Operations and maintenance
Long-term considerations for bridge operations and maintenance, including collection and processing of tolls, and operations and maintenance for high capacity transit.

File Repository

Historical documentation - This documentation is not searchable