Rock Valley Lake Dam, located in Wayne County, Iowa, is a privately owned structure that serves primarily for recreation purposes. Completed in 2008, this earth dam stands at a height of 39 feet and has a length of 765 feet, creating a reservoir with a storage capacity of 1232 acre-feet. The dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections to ensure its structural integrity.

Despite being classified as having a significant hazard potential, Rock Valley Lake Dam was assessed to be in satisfactory condition as of August 2019. The dam features an uncontrolled spillway with a width of 2 feet and is situated on the TR-South Fork Chariton River, contributing to a surface area of 62 acres. While the dam poses a moderate risk, management measures are in place to mitigate any potential issues and ensure the safety of the surrounding area.

With its picturesque location near the Rathbun Reservoir, Rock Valley Lake Dam offers a tranquil setting for water resource and climate enthusiasts to appreciate the intersection of human infrastructure with natural landscapes. As a vital component of the local ecosystem, this dam serves as a reminder of the importance of sustainable water management practices in the face of evolving environmental challenges.