Located in Harrison, Iowa, the Koski Dam is a private earth dam designed by the USDA NRCS with a primary purpose of flood risk reduction. Completed in 2011, this dam stands at a height of 41 feet and stretches 500 feet in length, providing a storage capacity of 48 acre-feet and a surface area of 2 acres. Situated on a tributary to Willow Creek, the dam serves multiple purposes including fish and wildlife pond creation, grade stabilization, and recreation.

Despite its low hazard potential, the condition assessment of the Koski Dam has not been rated, and there is no information available on its emergency action plan or risk assessment. As a non-federally owned structure, the dam does not fall under the jurisdiction or regulation of any state agency. With no inspection or enforcement protocols in place, the maintenance and safety of the dam rely solely on the private owner. Despite these limitations, the Koski Dam remains a key asset in managing flood risks in the Missouri Valley area.

Water resource and climate enthusiasts can appreciate the ecological and recreational benefits provided by the Koski Dam, while also recognizing the importance of ongoing monitoring and maintenance to ensure its continued effectiveness in flood risk reduction. The collaboration between private owners and government agencies, such as the USDA NRCS, highlights the importance of partnerships in safeguarding water resources and enhancing community resilience to climate-related challenges. As discussions around climate change intensify, structures like the Koski Dam play a crucial role in mitigating the impacts of extreme weather events and protecting vulnerable communities.