North Fork Hughes River Site 21c Dam, located in Cornwallis, West Virginia, is a local government-owned structure designed by Gannett Fleming to reduce flood risks along the North Fork of the Hughes River. Completed in 2002, this multi-arch dam stands at a height of 93 feet and has a storage capacity of 44,231 acre-feet, with a normal storage level of 3,717 acre-feet. The dam's primary purpose is flood risk reduction, but it also serves recreational purposes for the community.

The dam, regulated by the West Virginia Department of Environmental Protection, is inspected every two years to ensure its satisfactory condition and high hazard potential. Its uncontrolled spillway and outlet gates provide emergency water release mechanisms. Despite a moderate risk assessment, the dam has met regulatory guidelines and is equipped with an Emergency Action Plan to address any potential safety concerns. With a solid track record and a commitment to safety, the North Fork Hughes River Site 21c Dam continues to play a crucial role in water resource management and climate resilience in the region.