1337508: 100th St. Bascule Bridge Over the Calumet River Rehabilitation

The Illinois Department of Transportation is requesting bids on the rehabilitation of the 100th Street Bascule Bridge over the Calumet River, with proposals due November 6, 2026.

The scope encompasses comprehensive structural rehabilitation including replacement and repair of bridge components, mechanical systems upgrades for bascule operation, structural steel repairs, deck resurfacing, and associated approaches. Contractors must demonstrate experience with bridge rehabilitation, bascule bridge mechanical systems, and similar transportation infrastructure projects. Work is designed to extend service life while improving traffic flow and safety and will proceed in phases to minimize disruption to traffic and river navigation.

The project is funded through Illinois state transportation funds allocated to IDOT's capital improvement program. Contractors must comply with applicable federal and state transportation standards and regulations. Detailed specifications, engineering plans, and technical requirements are provided in supporting project documentation. A pre-bid meeting and site visit opportunity are established to allow potential contractors to understand project requirements and site conditions.