Martins Dam, located in Vail, Iowa, is a privately owned structure built in 1966 for multiple purposes, including fire protection, stock, and small fish pond management. Managed by the USDA NRCS, this earth dam stands at a height of 23 feet with a length of 625 feet, providing a storage capacity of 101 acre-feet. Situated along TR-Miller Creek, this dam serves the community with a low hazard potential and moderate risk assessment rating.

The dam is regulated and inspected by the Iowa DNR, ensuring compliance with state permitting and enforcement measures. While the dam's condition is currently unrated, it meets guidelines for emergency action plans and risk management. With a surface area of 9.8 acres and a drainage area of 0.6 square miles, Martins Dam plays a vital role in water resource management in Crawford County, Iowa. Enthusiasts of water resources and climate will find Martins Dam to be an essential feature in the local ecosystem, providing valuable services for both human and natural communities.