Ganzhorn Dam, located in Harrison County, Iowa, was completed in 1970 and is primarily used for fire protection, stock, and as a small fish pond. The dam is privately owned and regulated by the Iowa Department of Natural Resources. It stands at a height of 30 feet and has a length of 356 feet, with a storage capacity of 60 acre-feet and a surface area of 4 acres. The dam is classified as an earth dam with a soil foundation, and its primary purpose is to provide essential services to the surrounding area.

The dam's hazard potential is rated as low, with a moderate risk assessment score of 3. While the condition of the dam is currently not rated, it is regularly inspected by state authorities to ensure its safety and functionality. Ganzhorn Dam does not have an Emergency Action Plan (EAP) in place, and its risk management measures are not specified. The dam's spillway type is uncontrolled, and it does not have outlet gates or locks associated with it.

Despite its modest size and purpose, Ganzhorn Dam plays a crucial role in providing water resources for fire protection and livestock in the area. As climate change continues to impact water availability and quality, it is essential to monitor and maintain dams like Ganzhorn to ensure their resilience and effectiveness in the face of changing environmental conditions.