I-20-4720 Elgin O'hare (I-490) Roadway & Bridge Construction Supreme Dr. to I-90 MP 3.9 to MP 6.3

The Illinois State Toll Highway Authority awarded Contract I-20-4720 to Dunnet Bay Construction Company for roadway and bridge construction on the Elgin O'Hare Western Access Tollway (I-490) located between Supreme Drive and Interstate 90, spanning Mile Post 3.9 to Mile Post 6.3 in DuPage County and Cook County, Illinois. The contract award, announced on September 14, 2026, specifies a total contract value of $177.87 million with a performance period extending from September 14, 2026, through October 2, 2030. This represents the lowest responsive and responsible bid among four competing contractors, with unsuccessful bidders submitting proposals ranging from $179.45 million to $191.71 million.

The scope of work encompasses comprehensive infrastructure construction and development activities including earthwork, grading, haul road construction and maintenance, mainline and ramp pavement construction, bridge and retaining wall construction, building demolition, drainage and erosion control measures, landscaping, fencing, lighting, traffic signal installation, Intelligent Transportation Services infrastructure, toll plaza facility construction, overhead sign truss foundations, and maintenance of traffic operations. The contract incorporates Business Enterprise Program participation requirements with a Disadvantaged Business Enterprise utilization goal of 25.07 percent and a Veterans-Owned Small Business participation goal of 0.86 percent. Substantial completion is required by August 1, 2028, with final project completion by October 2, 2028, and liquidated damages provisions ranging from $12,000 to $25,000 per calendar day for non-compliance with project milestones and specific contract requirements.