Oak Grove Park Dam, located in Hawarden, Iowa, is a local government-owned structure designed by USDA SCS and completed in 1977. This earth dam, standing at 26 feet tall and stretching 255 feet in length, serves primarily for recreational purposes along the TR-Big Sioux River. With a storage capacity of 65 acre-feet and a surface area of 4.5 acres, the dam contributes to the overall enjoyment and utilization of the surrounding area.

Managed by the Iowa Department of Natural Resources, Oak Grove Park Dam is regulated, inspected, and permitted by the state, ensuring its safety and compliance with necessary guidelines. While the dam poses a low hazard potential and has not been officially rated for its condition, a moderate risk assessment has been assigned to it. Despite lacking a detailed risk management plan, the dam continues to facilitate recreational activities and enhance the natural beauty of Sioux County, Iowa.

With its uncontrolled spillway and soil foundation, Oak Grove Park Dam offers a tranquil setting for visitors to enjoy outdoor activities and appreciate the natural landscape. As an integral part of the local community, this dam stands as a testament to the importance of water resource management and climate resilience in the face of changing environmental conditions.