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This is an Invitation to Bid (ITB #26-026) issued by the Kenton County Airport Board for the design and furnishing of coarse bubbler aeration equipment to replace existing fine bubbler aeration systems in two digester tanks at Cincinnati/Northern Kentucky International Airport. The procurement requires the supply of complete aeration systems including coarse bubble diffusers, diffuser mounting assemblies, air distribution manifolds constructed of Type 304 stainless steel, drop pipes, fittings, supports, and connection components for both tanks, with an optional alternate for contractor-provided installation services. A mandatory pre-bid meeting and site visit is scheduled for Thursday, April 23, 2026 at 10:00 am at CVG Centre Administrative Offices, 77 Comair Boulevard, Erlanger, Kentucky 41018. Written questions must be submitted by 11:59 pm on Monday, April 27, 2026, with responses posted no later than 11:59 pm on Thursday, April 30, 2026. Sealed bids are due no later than Thursday, May 7, 2026 at 2:00 pm Eastern Time through KCAB's online bidding portal, with bids remaining valid for a minimum of 120 days from the closing date. Equipment delivery is required within 24 weeks of design approval, with an anticipated board approval date of May 26, 2026 and construction completion targeted for November 1, 2026.

The project is federally funded and subject to FAA requirements, mandating compliance with Buy American preferences, Disadvantaged Business Enterprise participation goals, Davis-Bacon prevailing wage requirements if installation services are included, Executive Order 11246 affirmative action requirements, and civil rights compliance. The total appropriations request is $639,000.00, comprising $551,000.00 for equipment costs and $88,000.00 for construction and installation costs including a 20 percent vendor contingency. Pricing must be firm fixed, all-inclusive, and delivered FOB Cincinnati/Northern Kentucky International Airport. Equipment manufacturers must demonstrate a minimum of five years of documented experience producing similar coarse bubble aeration systems and provide proven performance through at least three installations of similar size and application. Bidders must submit a bid bond equal to 10 percent of the proposed contract amount, a performance bond of 100 percent of the contract amount, and a payment bond of 100 percent of the contract amount from a surety company rated at least "A" by Best Insurance Reports and authorized to do business in Kentucky. Liquidated damages of 1 percent of the purchase price per day of delay apply, with termination rights available after 60 days of non-compliance.