Located in Shelby County, Iowa, the Mill Picayune Watershed Site M-24-7 is a dam constructed in 1972 by the USDA NRCS to serve multiple purposes including fire protection, stock watering, and small fish pond maintenance. With a dam height of 35 feet and a length of 725 feet, this earth dam has a storage capacity of 382 acre-feet and covers a surface area of 13.8 acres. The dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections to ensure its functionality and safety.

The dam, situated on TR-Mill Creek, is primarily used for flood risk reduction in addition to its other functions. Despite its low hazard potential, the site has a moderate risk assessment rating, indicating the need for ongoing risk management measures. The Mill Picayune Watershed Site M-24-7 has not been modified since its completion and its condition is currently not rated. With its strategic location and vital role in water resource management, this site is a key component of the local government's efforts to protect and sustainably utilize water resources in the area.

Managed by the Natural Resources Conservation Service, this dam plays a crucial role in water conservation and management in the region. Its presence ensures the availability of water for various uses while also reducing the risk of flooding in the surrounding areas. With its regulated status and regular inspections, the Mill Picayune Watershed Site M-24-7 stands as a testament to responsible water resource management and the importance of infrastructure in mitigating climate-related risks.