Located in Harrison County, Iowa, the Mill Picayune Watershed Site S-8-3 is a key water resource managed by the local government with oversight from the Iowa Department of Natural Resources. Built in 1965 by the USDA NRCS, this earth dam serves multiple purposes including fire protection, stock watering, and small fish pond management. With a dam height of 34 feet and a storage capacity of 56 acre-feet, the site covers a surface area of 4.3 acres and has a drainage area of 0.28 square miles, primarily serving the TR-Picayune Creek.

Despite its low hazard potential, the dam at Mill Picayune Watershed Site S-8-3 plays a crucial role in flood risk reduction for the surrounding area. With a moderate risk assessment rating, the dam is regularly inspected for maintenance and safety compliance. While the site's condition assessment is currently labeled as "Not Rated," its strategic location and design make it an essential component of the local water management infrastructure. Enthusiasts of water resources and climate resilience will find the details of this watershed site fascinating and indicative of the proactive measures taken to protect the community from potential hazards.