West Fork #3 Subwatershed Station 25+20 #9a, located in Woodbury County, Iowa, is a low-hazard earth dam completed in 1961 for fire protection, stock, and small fish pond purposes. Managed by the USDA NRCS, this dam has a height of 36 feet and a storage capacity of 55 acre-feet. With a drainage area of 0.35 square miles, the dam serves as a flood risk reduction measure for the West Fork Little Sioux River.

Despite its low hazard potential, this dam is regulated by the Iowa DNR and undergoes regular inspections, permitting, and enforcement actions to ensure its safety and functionality. The dam's condition assessment is currently not rated, but its risk assessment is moderate. While the dam has not been modified in recent years, it is equipped with an uncontrolled spillway and does not have outlet gates or associated locks.

Overall, West Fork #3 Subwatershed Station 25+20 #9a plays a crucial role in water resource management in the area, providing essential protection against flooding and supporting local agricultural and environmental needs. As climate change continues to impact water resources, the maintenance and monitoring of dams like this one will be essential in ensuring the resilience of communities and ecosystems in the face of changing conditions.