Andersen Dam, located in Harrison County, Iowa, is a privately owned structure designed by NRCS for grade stabilization purposes. Completed in 2001, this earth dam stands at a height of 27 feet and spans a length of 432 feet, providing a maximum storage capacity of 29 acre-feet. The dam is situated on TR-WILLOW CREEK and is regulated by the Iowa Department of Natural Resources, with state permitting, inspection, and enforcement in place to ensure its safety and functionality.

With a low hazard potential and a moderate risk assessment rating, Andersen Dam serves as a crucial component in managing water resources in the region. The dam's primary purpose of grade stabilization helps control erosion and protect downstream areas from flooding, with an uncontrolled spillway designed to manage excess water flow. Despite not having a current condition assessment, the dam's construction and design meet regulatory standards and contribute to the overall water management efforts in the area.

As a significant infrastructure in the Rock Island District, Andersen Dam plays a vital role in water resource management in Iowa. With its strategic location and design, the dam effectively contributes to flood control and water storage, showcasing the importance of sustainable water infrastructure in mitigating the impacts of climate change. Climate enthusiasts and water resource professionals alike can appreciate the functionality and significance of Andersen Dam in maintaining the ecological balance of the surrounding area.