Diers Dam, located in Jefferson County, Iowa, was completed in 1969 and serves multiple purposes including fire protection and as a stock or small fish pond. This private dam, designed by USDA SCS, stands at a height of 21 feet and has a storage capacity of 61 acre-feet. Situated on TR-ROCKY BRANCH CREEK, this Earth-type dam covers a surface area of 3.8 acres and has a drainage area of 0.09 square miles.

Despite its low hazard potential, Diers Dam is regulated by the Iowa Department of Natural Resources and undergoes regular state inspections and enforcement measures. The dam has not been rated for its condition assessment, but the risk assessment is moderate. The dam's spillway is uncontrolled, and it does not have any outlet gates. While the dam has not been modified in recent years, it is essential for water resource and climate enthusiasts to monitor its condition and potential risks moving forward.