This document provides details on a federal solicitation for replacement of the Cosby water line at Great Smoky Mountains National Park. The solicitation number is 140P5321R0015 and is being issued by the National Park Service Southeast Region on behalf of Great Smoky Mountains NP. The solicitation seeks to replace approximately 7,500 linear feet of existing 6-inch water transmission line from Cosby Creek to the Cosby Campground with new 8-inch PVC pipe. Responses are due by August 31, 2021 and the period of performance is 180 calendar days from award. The estimated value of the contract is between $1 million and $5 million. This project will improve water service reliability for park visitors and employees at Cosby Campground.