The National Park Service is conducting a market survey to identify contractors interested in replacing the aging fire alarm and intrusion alarm systems at Saint Croix National Scenic Riverway in Saint Croix Falls, WI. The work includes demolition and installation of new non-proprietary alarm systems, an electronic access control system, and selective door replacements, with optional CCTV and exterior lighting. Contractors must be registered as a small business under NAICS code 561621 (Security Systems Services) with a size standard of $25M. Responses to the market survey are due by 1830 CDT on May 8, 2026. No budget amount is specified in the description.