Patrick Williams Dam, located in Barnwell, South Carolina, along the SPUR BRANCH river, is a private-owned structure primarily used for recreational purposes. Standing at a height of 14 feet and a length of 1020 feet, this earth dam provides a storage capacity of 216 acre-feet, with a normal storage capacity of 156 acre-feet. Despite being a privately owned dam, it is regulated and inspected by the South Carolina Department of Health and Environmental Control (DHEC), ensuring its safety and compliance with state regulations.

The dam has a significant hazard potential and is rated in fair condition as of the last assessment in March 2019. With inspections occurring every three years, the dam's emergency action plan (EAP) is continuously updated to meet guidelines and ensure preparedness in case of any unforeseen events. While no risk assessment or management measures are currently available, the dam remains a key feature for water resource and climate enthusiasts in the area, providing opportunities for outdoor activities and leisure in a picturesque setting.

As part of the Savannah District in the US Army Corps of Engineers, Patrick Williams Dam adds to the region's water infrastructure, contributing to flood control and water supply management. With its stone core and soil foundation, the dam serves as a vital structure for the local community, offering not only recreational benefits but also playing a crucial role in water resource management in South Carolina. Its location and design make it a noteworthy site for those interested in water resources and climate adaptation efforts in the region.