Illinois and Iowa Advance $781M in Quad Cities Mississippi River Bridge Projects

The Illinois Department of Transportation (IDOT) is advancing plans for two Mississippi River crossings in the Quad Cities, working with the State of Iowa on projects with a combined programmed cost of $781 million. The announcements follow the opening of the Interstate 74 Mississippi River bridge and concern the I-80 crossing between Rapids City, Illinois, and LeClaire, Iowa, and the U.S. 67 Centennial Bridge connecting Rock Island, Illinois, and Davenport, Iowa. Both states are expected to share each project’s cost equally. For contractors and suppliers, these plans are early market signals rather than active procurement notices: no solicitation or contract award has been announced.

The I-80 project is the nearer-term opportunity. Its $481 million program includes new eastbound and westbound spans, each designed to carry three lanes, as well as reconstruction of the I-80/I-88 interchange. The current bridge opened in 1966 and is approaching the end of its useful life. Construction is scheduled to begin in 2028 and is expected to take up to four construction seasons. The staged approach is intended to maintain two lanes of traffic in each direction: crews will first build a new eastbound span south of the existing bridge, shift traffic onto it, demolish the existing bridge, and then build the westbound span. The westbound bridge is planned to include a path for walking and biking.

The $300 million U.S. 67 Centennial Bridge is further out on the project timeline, with construction anticipated after the I-80 bridges are completed, likely around 2032. The preferred alignment is just west of the existing bridge, but the final bridge type and design remain under development. Options presented for consideration include a tied arch, steel plate girder, single-tower cable-stayed, and two-tower cable-stayed designs. Planning is expected to continue as the project moves from Phase I, the planning stage, toward Phase II, which covers design-plan development and land acquisition. Firms interested in engineering, environmental services, property-related work, construction, materials, or specialty bridge systems should monitor those activities as the scope becomes more defined.

The schedule creates a multi-year pursuit horizon, not an immediate bid window. Firms can use the I-80 start date to plan staffing, teaming, equipment, and supplier engagement, while tracking the later Centennial Bridge project separately because its design and construction sequencing are less mature. The equal cost-sharing arrangement means both Illinois and Iowa are stakeholders in funding and project coordination. Businesses should follow IDOT project updates and future procurement notices for details on packages, qualification requirements, schedules, and contracting structures; the source material does not identify a selected bridge design for U.S. 67 or any current solicitation, award, or named prime contractor.

• I-80 Mississippi River bridge: $481 million programmed cost, shared equally by Illinois and Iowa; construction is expected to begin in 2028.
• I-80 scope: New eastbound and westbound spans, three lanes in each direction, and reconstruction of the I-80/I-88 interchange.
• Construction sequencing: Build the eastbound span south of the existing bridge, shift traffic, demolish the old bridge, then build the westbound span; maintain two lanes each way during construction.
• I-80 schedule: Up to four construction seasons; the westbound span is planned to include a walking and biking path.
• U.S. 67 Centennial Bridge: $300 million programmed cost, also split equally between Illinois and Iowa; construction is anticipated around 2032, after the I-80 bridges are complete.
• Centennial Bridge alignment and design: Preferred location is west of the existing bridge; options include tied arch, steel plate girder, single-tower cable-stayed, and two-tower cable-stayed designs.
• Preconstruction watch points: U.S. 67 planning will continue toward Phase II design development and land acquisition, creating potential future work for design and related services firms.
• Pursuit guidance: Treat both projects as pipeline opportunities, not active bids; no solicitation or contract award has been announced, so monitor agency updates for procurement milestones.