Located in Macksburg, Iowa, the Overmeyer Dam was completed in 1959 by the USDA NRCS and is currently regulated by the Iowa Department of Natural Resources. This private earth dam sits at a height of 30 feet and spans 365 feet along the TR-Bush Branch river. With a primary purpose of fire protection, stock, or small fish pond, the dam has a storage capacity of 50 acre-feet and a surface area of 4 acres, serving as a vital resource for the local community.

Despite its low hazard potential, the dam's condition assessment is currently not rated, reflecting the need for updated inspections and risk management measures. The Overmeyer Dam poses a moderate risk level, emphasizing the importance of regular maintenance and emergency preparedness. As water resource and climate enthusiasts, staying informed about the dam's condition and regulatory oversight is crucial for ensuring the safety and sustainability of this vital infrastructure in Adair County, Iowa.