The National Park Service intends to replace aging fire alarm and intrusion alarm systems at the Saint Croix National Scenic Riverway in Saint Croix Falls, Wisconsin. The work includes demolition, installation of new non-proprietary systems, electronic access control, door replacements, and optional CCTV and exterior lighting. This is a firm fixed-price contract set aside for 100% small businesses, with a NAICS size standard of $25 million. Performance is expected to begin within 30 days of award or 10 days of Notice to Proceed, with an award anticipated before fall 2026. A site visit will be announced in the solicitation, and offerors must be registered in SAM.gov.