Oen Dam, located in Wayne County, Iowa, serves multiple purposes including fire protection, stock watering, and creating a small fish pond. Built in 2008 by the NRCS, this earth dam stands at a height of 28 feet with a length of 480 feet, providing a storage capacity of 97 acre-feet. The dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections and enforcement to ensure its safety and compliance with state regulations.

Situated on TR-Wildcat Creek near Rathbun Reservoir, Oen Dam poses a low hazard potential with a moderate risk assessment rating. Despite its low hazard potential, the dam has not been given a condition assessment rating and does not currently have an Emergency Action Plan in place. With a surface area of 5.4 acres and a drainage area of 0.29 square miles, the dam's primary purpose of providing water for various uses is underscored by its location in a region with a history of water resource management challenges.

As a privately owned structure, Oen Dam plays a crucial role in water resource management in the region, contributing to water supply and ecosystem health. Its presence underscores the importance of maintaining and regulating dams to ensure the safety and sustainability of water resources in the face of changing climate patterns and increasing water demands.