1337517: southwest pumping station tunnel connection (SWPS-TC)

The State of Illinois is requesting bids for construction of the Southwest Pumping Station Tunnel Connection (SWPS-TC), a tunnel system connecting the southwest pumping station to related infrastructure, with proposals due November 17, 2026.

The scope encompasses excavation, tunnel boring, structural construction, and associated mechanical and electrical systems. Bidders must address project specifications, construction methodology, safety plans, geotechnical and site conditions, environmental requirements, and completion timeline in their proposals. Cost estimates must cover all labor, materials, equipment, and contingencies for complete tunnel connection installation.

The attached bidding document (77366_4.pdf, posted September 24, 2026) contains site conditions, geotechnical considerations, and specific response dates, including any pre-bid meetings or site visits. Illinois procurement guidelines may apply set-asides for small business or disadvantaged business enterprise participation; the contracting authority's determination will be detailed in the full solicitation materials. Contract term, project extension provisions, and warranty terms are specified in the contractual conditions.