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This is an Invitation to Bid issued by the Kenton County Airport Board (KCAB) for the design and furnishing of coarse bubbler aeration equipment to replace the existing fine bubbler aeration system in two digester tanks at Cincinnati/Northern Kentucky International Airport. The project encompasses 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 will be held on 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. Equipment delivery is required within 24 weeks of design approval, with board approval anticipated for May 26, 2026 and construction completion targeted for November 1, 2026. Bids must remain valid for a minimum of 120 days from the closing date.

Pricing must be firm fixed, all-inclusive, and delivered FOB Cincinnati/Northern Kentucky International Airport, with the total appropriations request of $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. This federally funded project is subject to FAA requirements and mandates compliance with Buy American preferences, Disadvantaged Business Enterprise (DBE) participation goals, Davis-Bacon prevailing wage requirements if installation services are included, and Executive Order 11246 affirmative action requirements. Equipment manufacturers must demonstrate a minimum of five years of documented experience producing similar coarse bubble aeration systems for industrial or municipal wastewater applications 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, with all bonds obtained from a surety company rated at least "A" by Best Insurance Reports and authorized to do business in Kentucky. Liquidated damages are assessed at 1 percent of the purchase price per day of delay, with termination rights available after 60 days of non-compliance.