Zach Mendenhall Dam is a private dam located in Chariton, Iowa, and serves multiple purposes including grade stabilization, recreation, and water supply. This earth dam, completed in 2017, stands at a height of 26 feet and spans 441 feet in length. It has a storage capacity of 61 acre-feet and covers a surface area of 4 acres, serving a drainage area of 0.22 square miles.

Managed by the USDA NRCS, Zach Mendenhall Dam is regulated by the Iowa DNR and undergoes regular inspections to ensure its safety and functionality. With a low hazard potential and a moderate risk assessment rating, the dam plays a crucial role in managing water resources in the area. Even though the dam is not rated for its condition, it continues to provide essential services while meeting regulatory guidelines.

Located on a tributary to the Chariton River, Zach Mendenhall Dam has an uncontrolled spillway with a width of 20 feet. Despite not having outlet gates, the dam effectively stabilizes the surrounding area and contributes to water supply needs. With its strategic design and multiple benefits, this dam is a significant asset for water resource and climate enthusiasts in the region.