Stay tuned for updates on awarded contracts and project milestones on Construction Illinois News.
The Illinois Department of Transportation (IDOT) oversees a multi-billion-dollar construction program under its Rebuild Illinois plan. Each year it issues bids for critical projects—ranging from highway widening and bridge reconstruction to ADA upgrades—all essential for enhancing statewide mobility and safety.
Project Name: I-270 Chain of Rocks Bridge Replacement & Corridor Upgrades
Location: Metro East area (Madison County, IL) across the Mississippi River into Missouri
Estimated Budget: $496 million (bridge segment) within a $1.2 billion corridor plan Jacksonville Journal-Courier+8Illinois Department of Transportation+8Illinois Department of Transportation+8
Scope of Work:
Replace the aging Chain of Rocks Bridge and expand it from four to six lanes
Reconstruct the Illinois 111/I‑270 interchange and related ramps in Illinois and Missouri
Improve access, traffic flow, and freight capacity through coordinating overhaul of the I‑270 corridor
Deadline: Procurement is online now, with multiple IDOT lettings planned through 2025–2026
Pre-Bid Conference: Information available via IDOT’s Innovative Project Delivery portal
Bid Submission: Electronic submission through IDOT’s iCX and Design-Build), given the IPD format webapps.dot.illinois.gov+1Illinois Department of Transportation+1Illinois Department of Transportation
Bid Bond Requirement: Typically 10% of total bid value, per state project standards
Funded through IDOT’s Highway Improvement Program under Rebuild Illinois, including federal IIJA allocations and regional investment coordinated with Missouri agencies
Enhances a key freight corridor for tens of thousands of daily commercial vehicles
Supports logistics and manufacturing activity around Madison County—an emerging Midwestern freight hub
Modernizes bridge infrastructure for improved safety and economic development across state lines
Confirm prequalification and registration via IDOT’s IPD portal (Design-Build or CMGC process)
Monitor official bid bulletins available through IDOT’s Lettings & Bidding system (webapps.dot.illinois.gov) The TelegraphIllinois Department of Transportation+1webapps.dot.illinois.gov+1Illinois Tollway+2webapps.dot.illinois.gov+2webapps.dot.illinois.gov+2
Download contract documents and submit bids electronically through IDOT’s iCX platform
IDOT Contracts Office: Hanley Building, Springfield, IL – (217) 782‑7806 | DOT.DE‑Contracts@illinois.gov
🔗 Bid Portal & Documents: IDOT’s “Letting & Bidding” / IPD Procurement pages
Would you like a similar project spotlight—like the I‑290 drainage upgrades or Metro East interstate rebuilds—for your page as well?
Stay tuned for updates on awarded contracts and project milestones on Construction Illinois News.