The National Park Service plans to issue a firm-fixed-price contract for reconstructing the Sand Cave Boardwalk and pedestrian facilities at Mammoth Cave National Park, Kentucky. The work includes demolition, new concrete trail installation, and boardwalk construction, with a performance period of 180 calendar days from the Notice to Proceed. The contract is a 100% Total Small Business Set-Aside, using a Lowest Price Technically Acceptable evaluation method. Performance will occur at the Sand Cave Trailhead and the park entrance sign on Old Mammoth Cave Road. No budget amount is specified in this pre-solicitation notice.