Billy Cox Upper Dam, also known as W H Cox Dam 2, is a privately-owned earth dam located in Williamsburg, South Carolina. Completed in 1965, this dam serves primarily for recreation purposes and stands at a height of 7 feet with a length of 325 feet. With a storage capacity of 74 acre-feet, the dam is situated on the TR-JUNE BRANCH river or stream and is under the regulatory oversight of the South Carolina Department of Health and Environmental Control.

Despite its low hazard potential, Billy Cox Upper Dam is currently assessed to be in poor condition as of the last inspection in November 2017. The dam's emergency action plan status is unclear, and there are no inundation maps prepared or risk management measures in place. The dam's primary purpose for recreation highlights the importance of ensuring its structural integrity and safety for both the surrounding community and the environment. Water resource and climate enthusiasts may find interest in monitoring the maintenance and potential upgrades of Billy Cox Upper Dam to mitigate any risks associated with its condition.