Located in Woodbine, Iowa, the Mill Picayune Watershed Site P-4 is a crucial earth dam structure designed by the USDA NRCS in 1995 for fire protection, stock, small fish pond, and flood risk reduction purposes. This 240-foot-long dam stands at a height of 35 feet, providing a storage capacity of 170 acre-feet and covering a surface area of 4.3 acres. The dam regulates the flow of Picayune Creek, contributing to the overall drainage area of 5.31 square miles.

Managed by the local government and regulated by the Iowa DNR, this site has a low hazard potential and a moderate risk assessment rating. Despite being in operation for over two decades, the condition assessment remains unrated, highlighting the need for regular inspections and maintenance. With its uncontrolled spillway type and soil foundation, the Mill Picayune Watershed Site P-4 serves as a critical infrastructure for water resource management in Shelby County, Iowa.

Enthusiasts of water resources and climate change will find the Mill Picayune Watershed Site P-4 to be a fascinating case study in sustainable dam management and environmental conservation efforts. As part of the broader efforts to mitigate flood risks and enhance water storage capacity, this earth dam plays a vital role in protecting local communities and ecosystems. Through ongoing monitoring and risk management measures, this site exemplifies the importance of proactive stewardship in safeguarding our water resources for future generations.