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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 systems in two digester tanks at Cincinnati/Northern Kentucky International Airport. The procurement encompasses 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. 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. 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 anticipated board approval on May 26, 2026 and construction completion targeted for November 1, 2026.

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 under 49 CFR Part 26, Davis-Bacon prevailing wage requirements if installation services are included, Executive Order 11246 affirmative action requirements, Title VI civil rights compliance, and drug-free workplace provisions. Bidders must submit a bid bond equal to 10 percent of the proposed contract amount, a performance bond of 100 percent, and a payment bond of 100 percent, all from a surety company rated at least "A" by Best Insurance Reports and authorized to do business in Kentucky. Required certifications include Non-Debarment or Suspension Certification, Buy American Certification, Disclosure of Lobbying Activities Certification, Worker's Compensation Affidavit, Certification of Tax Delinquency and Felony Convictions, and Certification Regarding Domestic Preferences. All bidders and subcontractors must submit comprehensive safety documentation including DART rates, Workers' Compensation Experience Modification Rates, OSHA 300 logs, and documentation of any serious or willful OSHA violations. Bids must remain valid for a minimum of 120 days from the closing date, with liquidated damages assessed at 1 percent of the purchase price per day of delay.