Tierney Dam, located in Keokuk, Iowa, is a significant earthen dam with a height of 14 feet and a length of 500 feet, completed in 2002. It serves as a crucial structure on a tributary of the South Skunk River, providing storage capacity of 146 acre-feet for water resource management in the region. The dam is owned and regulated by the Iowa Department of Natural Resources, ensuring regular inspections and enforcement of safety measures.

With a spillway type of 'Uncontrolled' and a significant hazard potential, Tierney Dam poses a moderate risk according to the data available. Despite not being rated for its condition, the dam meets state permitting and inspection requirements, demonstrating a commitment to maintaining its integrity. As a structure with stone core and soil foundations, Tierney Dam plays a vital role in flood control and water storage, supporting the local ecosystem and communities that rely on its services.

Overall, Tierney Dam stands as a testament to engineering ingenuity and environmental stewardship in managing water resources and climate challenges. Its presence in Congressional District 02, Iowa, underscores the importance of infrastructure in safeguarding against natural disasters and ensuring sustainable water management practices for future generations to come.