Located in Monona, Iowa, the Mike Mikkelson Subwatershed 5-5020 is a vital water resource managed by the local government with oversight from the Iowa Department of Natural Resources. This subwatershed is designed to serve multiple purposes including fire protection, stock maintenance, and flood risk reduction. With a dam height of 50 feet and a storage capacity of 82 acre-feet, the structure was completed in 1970 and covers a drainage area of 0.56 square miles.

Despite its low hazard potential, the subwatershed poses a moderate risk due to its proximity to the TR-Little Maple River. Managed by the Natural Resources Conservation Service, the dam serves as a critical component of the local ecosystem, providing essential water storage and flood control capabilities. While the overall condition of the structure is currently unrated, regular inspections and maintenance ensure its operational efficiency for the surrounding community of Little Sioux.

With a surface area of 3.1 acres and a normal storage capacity of 36 acre-feet, the Mike Mikkelson Subwatershed 5-5020 plays a crucial role in water resource management and climate resilience efforts in the region. As climate change continues to impact water availability and extreme weather events, the subwatershed serves as a valuable asset in mitigating potential risks and ensuring sustainable water access for the local population.