Williamson Dam, located in Appanoose County, Iowa, is a privately owned structure designed by the USDA NRCS for fire protection, stock, or as a small fish pond. Completed in 1995, this earth dam stands at a height of 30 feet with a length of 360 feet, providing a storage capacity of 135 acre-feet. Situated on TR-Copper Creek, this dam serves the primary purpose of fire protection and livestock water supply.

Managed by the Iowa DNR, Williamson Dam is regulated, inspected, and enforced by state agencies to ensure its safety and compliance with regulations. With a hazard potential rated as low and a moderate risk assessment, the dam has not been assessed for its condition and emergency preparedness. Despite its limited spillway capacity and uncontrolled spillway type, Williamson Dam plays a crucial role in water resource management for the surrounding area.

While Williamson Dam may not have undergone recent inspections or assessments, its significance in providing water for fire protection and livestock in the region cannot be understated. With its strategic location and storage capacity, this earth dam serves as a vital resource for maintaining water supply and managing potential risks associated with its operation. As an essential infrastructure for the community, continued monitoring and maintenance of Williamson Dam are essential to ensure its long-term functionality and safety in the face of changing climate conditions.