Depenning Dam, located in Jasper County, Iowa, is a privately owned structure designed by USDA NRCS and completed in 1977. The dam serves multiple purposes, including fire protection and providing a water source for stock or small fish ponds. With a height of 28 feet and a length of 309 feet, the dam has a storage capacity of 53 acre-feet and a surface area of 3.4 acres. It is regulated by the Iowa Department of Natural Resources and is inspected regularly to ensure its safety and functionality.

The dam's primary purpose and design as an earth dam make it a crucial asset for water resource management in the area. The low hazard potential and moderate risk assessment indicate that the dam is well-maintained and poses minimal risk to the surrounding community. Despite its uncontrolled spillway type, the dam's construction and operation have been overseen by the Natural Resources Conservation Service, ensuring compliance with state regulations and safety standards. Overall, Depenning Dam stands as a vital infrastructure for water conservation and management in the region, contributing to both environmental protection and community safety.

As a part of the Rock Island District, Depenning Dam plays a significant role in regulating the flow of Reasnor Creek and providing essential water resources for the local ecosystem. While it is primarily used for fire protection and irrigation purposes, the dam's construction and operation also support the conservation of small fish populations. With its earth dam design and soil foundation, the structure has been deemed to have a low hazard potential and remains in good condition. Moving forward, continued inspections and adherence to regulatory guidelines will be vital in ensuring the long-term functionality and safety of Depenning Dam for the benefit of both the environment and the community it serves.