Located in Grand River, Iowa, the Van Hall Dam is a private-owned structure designed by NRCS and completed in 1995. It stands at a height of 8 feet and stretches 1760 feet long, holding a storage capacity of 79 acre-feet. The dam serves multiple purposes including recreation and flood control, with a low hazard potential and moderate risk assessment rating.

Operated by the Iowa Department of Natural Resources, the Van Hall Dam is regulated, permitted, inspected, and enforced by state agencies to ensure its safety and effectiveness. Situated on the TR-Twelve Mile Creek, the dam's earth design with a soil foundation contributes to its stability and functionality. Despite being uncontrolled, the spillway width and discharge capacity remain at a minimum, posing minimal risk to downstream areas.

With a surface area of 15.1 acres and a drainage area of 0.28 square miles, the Van Hall Dam provides essential water resource management in Union County. Its strategic location and design make it a significant asset for the local community, showcasing the importance of responsible dam construction and maintenance in mitigating potential climate-related risks.