Hendrickson Marsh Dam, located in Marshall County, Iowa, serves as a vital recreational resource for the local community. Completed in 1967, this earth dam stands at 18 feet high and stretches 321 feet in length, holding a storage capacity of 2,800 acre-feet. With a surface area of 264 acres and a drainage area of 13.19 square miles, the dam's primary purpose is to provide recreational opportunities for visitors in the area.

Managed by the Iowa Department of Natural Resources, the dam has a low hazard potential and is in satisfactory condition as of the last assessment in June 2020. The dam features an uncontrolled spillway with a width of 35 feet, ensuring the safe release of excess water during periods of high flow. Despite its moderate risk rating, the dam is regularly inspected and maintained to uphold safety standards and mitigate any potential risks to surrounding communities.

As a significant feature along the Marshall-Story D.D. #2 river system, Hendrickson Marsh Dam plays a crucial role in water resource management and climate resilience efforts in the region. Its presence not only enhances recreational opportunities but also serves as a reminder of the importance of sustainable infrastructure development in safeguarding our natural environment for future generations.