Harmon Creek No. 4 Dam, also known as Mechling Run Dam, is a local government-owned structure located in Colliers, West Virginia. Built in 1970 by the USDA NRCS, this earth dam stands at a height of 64 feet and serves primarily for flood risk reduction along Mechling Run. The dam has a storage capacity of 174 acre-feet and covers a drainage area of 0.74 square miles.

With a high hazard potential and satisfactory condition assessment, Harmon Creek No. 4 Dam is regulated by the West Virginia Department of Environmental Protection. The dam features an uncontrolled spillway and outlet gates, with a maximum hydraulic height of 62 feet. Despite its moderate risk assessment rating, the dam has not undergone recent modifications and is inspected every two years to ensure its structural integrity and safety.

Enthusiasts of water resources and climate management will appreciate the design and purpose of Harmon Creek No. 4 Dam in mitigating flood risks in the Brooke County area. As a critical infrastructure in the region, the dam plays a crucial role in protecting the surrounding community from potential inundation events. Its historical significance, construction details, and ongoing regulatory oversight provide valuable insights into the intersection of water resource management and public safety.