Located in Union, Iowa, the Wittstock Dam is a private-owned structure designed by the USDA NRCS and regulated by the Iowa DNR. Completed in 1977, this earth dam serves multiple purposes including fire protection and providing a small fish pond. With a height of 27 feet and a length of 205 feet, the dam has a storage capacity of 22 acre-feet and covers a surface area of 1.5 acres.

Situated on the TR-Grand River, the Wittstock Dam plays a crucial role in managing water resources in the area, with a low hazard potential and a moderate risk assessment rating. The dam is equipped with an uncontrolled spillway and is inspected, permitted, and regulated by state authorities. Despite being in a rural location, the dam serves as a vital resource for the local community for both recreational and agricultural purposes.

With its strategic location and efficient design, the Wittstock Dam stands as a testament to effective water resource management in Iowa. As a focal point for climate and water resource enthusiasts, the dam showcases the importance of sustainable infrastructure for both environmental protection and community resilience in the face of changing climate patterns.