The National Park Service is conducting a market survey for a potential project to replace a cooling tower and install a new boiler at the Gateway Arch National Park. The work, anticipated to begin in Fall 2026, includes installing a new 800-ton cooling tower with condenser water pumps at the Arch complex and a new boiler with a heat exchanger at the grounds building. The estimated construction cost is between $1 million and $5 million. This is a sources sought notice only, not a solicitation for bids. Interested contractors must be registered as a small business under NAICS 238220 in SAM and should submit the required survey via email by the specified deadline.