Mc May Dam, located in Chariton, Iowa, is a privately owned earth dam constructed in 1955 by the USDA NRCS. Its primary purpose is for fire protection, stock, or as a small fish pond, with a storage capacity of 31 acre-feet and a surface area of 6 acres. The dam is regulated by the Iowa DNR and is subject to state permitting, inspection, and enforcement.

Situated on the Chariton River, Mc May Dam has a low hazard potential and a moderate risk assessment rating. Its uncontrolled spillway design and soil foundation contribute to its overall condition, which is currently not rated. The dam has not been modified in recent years and does not have an emergency action plan in place. Despite these factors, the dam serves as a significant resource for water management and wildlife habitat in the Lucas County area.

Overall, Mc May Dam plays a crucial role in providing water resource management and recreational opportunities in the region. As a privately owned structure, it underscores the importance of collaboration between private owners and state regulatory agencies to ensure the safety and effectiveness of water infrastructure. With its historical significance and ongoing maintenance, Mc May Dam stands as a testament to the intersection of human ingenuity and environmental stewardship in managing water resources and climate challenges.