Located in Woodbine, Iowa, the Mill Picayune Watershed Site P-41-1 is a local government-owned dam designed by the USDA NRCS for fire protection, stock, and small fish pond purposes. Completed in 1984, this Earth dam stands at a height of 29 feet and has a length of 755 feet, providing a storage capacity of 32 acre-feet. The dam sits on the TR-Picayune Creek and is regulated by the Iowa DNR, with state permitting, inspection, and enforcement in place to ensure its safety and functionality.

With a low hazard potential and a moderate risk assessment, the Mill Picayune Watershed Site P-41-1 is a vital component for flood risk reduction in the area. The dam has a surface area of 1.3 acres and serves a drainage area of 0.33 square miles, offering protection to the surrounding community. Despite its condition being not rated and lacking in certain emergency preparedness measures, the dam remains an essential resource for water management and conservation efforts in the region.

As part of the Rock Island District and under the ownership of the local government, the Mill Picayune Watershed Site P-41-1 plays a crucial role in maintaining water resources and climate resilience in Harrison County, Iowa. With its strategic location and purpose, this dam serves as a valuable asset for fire protection, livestock watering, and environmental sustainability, showcasing the importance of proper infrastructure for water management in the face of changing climate patterns.