Three Mile Creek Watershed Site 45-2 is a vital water resource in Union, Iowa, owned and regulated by the local government. Built in 1970 by the USDA NRCS, this Earth dam serves multiple purposes including fire protection, stock, and small fish pond management, as well as flood risk reduction. With a dam height of 31 feet and a storage capacity of 45 acre-feet, this site covers a surface area of 3.6 acres and has a drainage area of 0.11 square miles.

Located in Talmage, Iowa, along the TR-Three Mile Creek, this dam is under the jurisdiction of the Iowa DNR and is subject to state permitting, inspection, and enforcement. Its spillway type is uncontrolled, with a low hazard potential and a moderate risk assessment rating. While the condition of the dam is not currently rated, it is essential for maintaining the safety and water supply of the surrounding area. With its historical significance and ongoing role in water management, Three Mile Creek Watershed Site 45-2 stands as a testament to the importance of sustainable resource utilization in the face of changing climate conditions.