Mills Dam, located in Marshall County, Iowa, was completed in 1968 by the USDA NRCS and serves multiple purposes including fire protection and providing a habitat for small fish. This earth dam stands at 22 feet high and stretches 371 feet in length, with a storage capacity of 50 acre-feet and a surface area of 3.4 acres. The dam is regulated by the Iowa Department of Natural Resources and is regularly inspected for safety and compliance with state regulations.

Despite its low hazard potential, Mills Dam is considered to have a moderate risk level, indicating the importance of ongoing risk management measures. The dam features an uncontrolled spillway and is primarily used for recreational and agricultural purposes in the area. Its location on TR-ROCK CREEK makes it a valuable resource for water supply and conservation efforts in the region. Climate and water resource enthusiasts will find Mills Dam to be an interesting case study of how private entities can work with state agencies to manage and maintain crucial water infrastructure for multiple uses.