Jeff replace cooling tower and boilers

The Department of the Interior National Park Service Midwest Region seeks replacement of cooling tower and boiler units at Gateway Arch National Park in St. Louis, Missouri, with proposals due July 28 at 11:00 AM Central Time. The procurement is a 100% small business set-aside with a firm-fixed-price contract structure.

Place of performance is 11 N 4th Street, St. Louis, Missouri 63102. Work must be completed within 365 calendar days from Notice to Proceed and encompasses demolition, installation, testing, and commissioning of cooling tower and boiler equipment at the Arch complex and Grounds Maintenance Complex. The site presents significant logistics constraints due to its downtown location with limited laydown space and underground museum facilities unable to bear heavy loads. Work shall be performed during standard business hours (7:00 AM to 4:00 PM, Monday through Friday) without prior written approval. A mandatory site visit was held July 7, 2026.

Three contract line items are priced on a lump-sum basis: cooling tower replacement, boiler unit replacement, and an optional VAV replacement. Bids require a 20 percent bid guarantee (not to exceed $3 million) via Standard Form 24 bid bond. Performance and payment bonds of 100 percent are due within 10 calendar days of award. All bids must be submitted electronically in PDF format (maximum 25 MB per email) to bridget_parizek@ios.doi.gov. Prevailing wage requirements apply per Davis-Bacon Act General Decision MO20260080, and all construction materials must comply with Buy American requirements unless contracting officer approval is obtained.

The NAICS code is 238220, Plumbing, Heating, and Air-Conditioning Contractors, with a small business size standard of $19 million. Amendment 0003 extended the due date and provided a Question/Answer document. A pre-bid conference call is scheduled at 202-640-1187, Passcode 642 878 974#.