This is a pre-solicitation notice for a project to reconstruct deteriorating cave trails within the Ruins of Karnak, River Hall, and Rafinesque Hall at Mammoth Cave National Park in Kentucky. The work involves preparing ground, installing concrete footings and FRP platforms, and setting new stainless steel handrails, including transporting all materials into and out of the cave. The project has a completion date of February 28, 2027. It is set aside for small businesses, and the NAICS code indicates a size standard of $19 million. The official solicitation will be issued electronically on SAM.gov, and interested vendors must be registered in SAM with a Unique Entity ID.