Fertile Mill Dam, located in Worth County, Iowa, along the Winnebago River, is a gravity dam completed in 1929 primarily for recreational purposes. With a dam height of 11 feet and a length of 414 feet, the dam provides a maximum storage capacity of 116 acre-feet and covers a surface area of 260 acres. The dam is under the jurisdiction of the Iowa Department of Natural Resources and is regulated, inspected, and enforced by state authorities to ensure its safety and compliance with regulations.

Despite its low hazard potential and moderate risk assessment, Fertile Mill Dam has not been rated for its condition assessment. The dam features an uncontrolled spillway and is constructed on a soil foundation. With its scenic location and recreational opportunities, the dam serves as a popular spot for water resource and climate enthusiasts to visit. While the dam has not undergone recent modifications and lacks certain emergency preparedness measures, its overall risk management measures are in place to ensure the safety of the surrounding community and environment.