Ridinger Dam, located in Westerville, Iowa, on the TR-Twelve Mile Creek, was completed in 1964 by the USDA NRCS and serves multiple purposes such as fire protection and providing a small fish pond. This private dam, with a height of 27 feet and a length of 329 feet, has a storage capacity of 50 acre-feet and covers a surface area of 3.1 acres. Despite its low hazard potential, the dam is regulated by the Iowa Department of Natural Resources and undergoes regular state inspections.

The dam's primary purpose is to provide essential water resources for fire protection and stock, making it a valuable asset for the local community. With a moderate risk assessment rating of 3, the dam is considered to be in a stable condition, although its overall assessment is currently not rated. While the dam has not been modified in recent years, it continues to play a crucial role in water resource management and climate resilience in the region.

In the event of an emergency, the dam's emergency action plan (EAP) status remains unclear, highlighting the need for further preparedness measures. Overall, Ridinger Dam stands as a vital infrastructure for water storage and management in Union County, Iowa, showcasing the importance of maintaining and monitoring such structures for the long-term sustainability of water resources and climate adaptation efforts in the area.