Pony Creek Watershed Site 20, located in Mills County, Iowa, is a vital water resource managed by the local government and designed by the USDA NRCS. This earth dam, completed in 1965, serves multiple purposes including fire protection, stock watering, and small fish pond management. With a dam height of 48 feet and a storage capacity of 100 acre-feet, the site covers a surface area of 2.7 acres and drains a 0.17 square mile watershed area.

The dam at Pony Creek Watershed Site 20 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Although the last inspection was in 2003, the site is regulated by the Iowa DNR with state permitting, inspection, and enforcement in place. The risk assessment for this site is considered moderate, highlighting the importance of ongoing management and maintenance to ensure the safety and efficiency of the dam for flood risk reduction and other purposes. Overall, Pony Creek Watershed Site 20 plays a crucial role in water resource management in the region, showcasing the collaborative efforts between local government agencies and conservation services.