Lee Dam, located in Lyon County, Iowa, is a privately owned structure designed by the USDA NRCS for fire protection, stock, or small fish pond purposes. Completed in 1969, this earth dam stands at a height of 30 feet and spans 246 feet in length, with a storage capacity of 42 acre-feet. Situated on the TR-Big Sioux River, it serves as a crucial water resource for the surrounding area.

Managed by the Iowa Department of Natural Resources, Lee Dam is regulated, permitted, inspected, and enforced by state authorities to ensure its safety and functionality. With a low hazard potential and a moderate risk assessment rating, the dam plays a vital role in flood control and water management in the region. Despite its uncontrolled spillway type, the dam remains a reliable infrastructure for the community it serves.

Although not rated for condition assessment, Lee Dam continues to serve its purpose effectively, providing essential water resources for fire protection and livestock irrigation. With its strategic location and design, this earth dam stands as a testament to effective water resource management and climate resilience efforts in Iowa.