The Iowa Noname90 dam, located in Union Mills, Iowa, was completed in 1979 and is owned by the local government. This recreational dam stands at a height of 14 feet and spans a length of 585 feet, providing storage for 55 acre-feet of water. Situated on TR-Sugar Creek, the dam serves as a popular spot for outdoor activities and is regulated by the Iowa Department of Natural Resources.

With a low hazard potential and a moderate risk assessment rating, the Iowa Noname90 dam is considered to be in satisfactory condition, although its condition assessment is currently marked as "Not Rated." Despite its relatively small drainage area of 0.37 square miles, the dam offers a surface area of 5 acres for recreational use. Although it boasts uncontrolled spillways, the dam's overall design and construction by the USDA SCS have ensured its functionality and safety for visitors and nearby residents alike.