Wayne Co. Roadgrade Dam 21-69-20, located in Rathbun Reservoir, Iowa, is a local government-owned structure regulated by the Iowa DNR. Completed in 1993, the earth dam stands at a height of 29 feet and spans 750 feet, with a storage capacity of 108 acre-feet. The dam serves a primary purpose of "Other" and is designed to control the flow of the TR-South Fork Chariton River.

With a low hazard potential and a moderate risk assessment rating, Wayne Co. Roadgrade Dam 21-69-20 is a vital component of water resource management in the area. Despite not being rated for condition assessment, the dam is regularly inspected by state authorities, meeting all necessary regulatory guidelines. Its location in a scenic and environmentally sensitive area underscores the importance of its role in mitigating flood risks and ensuring the safety of surrounding communities and ecosystems.