Hudnutt Dam, located in Union Mills, Iowa, was completed in 1972 by the USDA NRCS. This private dam serves multiple purposes, including fire protection and providing a small fish pond. With a height of 28 feet and a length of 447 feet, the dam has a storage capacity of 130 acre-feet and covers a surface area of 9.6 acres. It is regulated by the Iowa Department of Natural Resources and is subject to state permitting, inspection, and enforcement to ensure its safety and compliance with regulations.

The dam, situated on TR-Sugar Creek, is classified as an earth dam with a soil foundation. Despite being rated as "Significant" in terms of hazard potential, the dam's condition is currently "Not Rated." However, a moderate risk assessment has been assigned to the structure, indicating the need for ongoing monitoring and risk management measures. The dam lacks an Emergency Action Plan (EAP) and inundation maps to guide emergency response in case of a breach, highlighting the importance of preparedness and safety protocols for water resource and climate enthusiasts interested in Hudnutt Dam.