Located in Macksburg, Iowa, the Mueller - Mitchell Dam is a private dam primarily used for fire protection, stock, and small fish pond purposes. Constructed in 2008 by the NRCS, this earth dam stands at a height of 25 feet with a length of 572 feet, providing a storage capacity of 129 acre-feet. Situated on Tr- Ninemile Creek, the dam is regulated by the Iowa DNR and is equipped with an uncontrolled spillway with a width of 1 foot.

With a low hazard potential and a moderate risk assessment rating, the Mueller - Mitchell Dam is a vital water resource in Adair County, Iowa. While the dam's condition is currently not rated, it undergoes regular state inspections, enforcement, and permitting to ensure its structural integrity and safety. Its strategic location and purpose make it essential for maintaining water supply and supporting local wildlife in the area.