Diede Dam, located in Sioux City, Iowa, is a privately owned earth dam primarily used for fire protection, stock, and as a small fish pond. Built in 1999 by the NRCS, this dam stands at 27 feet high and stretches 490 feet in length, with a storage capacity of 116 acre-feet. The dam sits on the TR-Floyd River and is regulated by the Iowa DNR, with state permitting, inspection, and enforcement in place to ensure its safety and compliance.

With a low hazard potential and a moderate risk assessment rating, Diede Dam serves as an important water resource structure in Plymouth County, Iowa. The dam's condition is currently not rated, but it meets state regulatory requirements and has a history of regular inspections. Despite its remote location and limited drainage area of 0.68 square miles, Diede Dam plays a crucial role in providing water for various purposes in the region, showcasing the intersection of water resource management and climate resilience in the heart of the Midwest.