Located in Harrison County, Iowa, the Little Sioux Dam is a gravity dam built in 1963 on the Little Sioux River. Managed by the local government, this structure serves multiple purposes beyond flood control, storing up to 500 acre-feet of water for various needs. With a height of 7 feet and a length of 200 feet, the dam contributes to the conservation of water resources in the region.

The Army Corps of Engineers designed the Little Sioux Dam, which is regulated by the Iowa Department of Natural Resources. Despite having a low hazard potential, the dam's condition is currently not rated. Its risk assessment is moderate, highlighting the importance of ongoing monitoring and maintenance efforts to ensure the safety and effectiveness of this essential water resource infrastructure. Enthusiasts of water resources and climate will find the Little Sioux Dam an intriguing case study in sustainable water management within the state of Iowa.