Marlin Run No. 1 is a significant earth dam located in Marlinton, West Virginia, constructed in 1961 by the USDA NRCS. This dam primarily serves the purpose of flood risk reduction along the Marlin Run river. With a height of 71 feet and a hydraulic height of 65 feet, the dam has a storage capacity of 342 acre-feet and covers a surface area of 2 acres, with a drainage area of 1.25 square miles.

Managed by the West Virginia Department of Water Resources, Marlin Run No. 1 has a high hazard potential but is currently assessed to be in satisfactory condition as of the last inspection in 2017. The dam features an uncontrolled spillway and outlet gates, emphasizing its function for flood control. Despite its moderate risk assessment, the dam meets regulatory guidelines and has an emergency action plan in place, ensuring the safety and protection of surrounding communities in case of any emergencies. Overall, Marlin Run No. 1 stands as a critical infrastructure for managing water resources and mitigating flood risks in the region.