Dunham Dam, located in Johnson County, Iowa, was completed in 1978 by the USDA NRCS and serves various purposes including fire protection, stock, and a small fish pond. The dam is privately owned and regulated by the Iowa Department of Natural Resources, with a low hazard potential and a moderate risk assessment rating. With a height of 38 feet and a length of 255 feet, Dunham Dam holds a storage capacity of 34 acre-feet and covers a surface area of 2.9 acres.

Situated on the TR-Iowa River, Dunham Dam plays a crucial role in water resource management in the area, providing vital support for agriculture and wildlife. The dam's earth structure, built on a soil foundation, ensures its stability and effectiveness in controlling the flow of water. Despite being uncontrolled, the spillway type of the dam ensures safe discharge of water during heavy rainfall events, maintaining its integrity and functionality.

Overall, Dunham Dam stands as a key infrastructure for water conservation and climate resilience in Iowa City. With a commitment to regular inspection, maintenance, and enforcement, the dam continues to fulfill its primary purposes while mitigating potential risks and ensuring the safety of the surrounding community and environment.