Located in Woodbine, Iowa, the Mill Picayune Watershed Site S-32-1 is a crucial water resource managed by the local government with oversight from the Iowa Department of Natural Resources. Built in 1992 by the USDA NRCS, this earth dam serves multiple purposes including fire protection, stock watering, small fish pond management, and flood risk reduction. With a dam height of 34 feet and a storage capacity of 84 acre-feet, this structure plays a vital role in managing water flow in the TR-South Picayune Creek.

Despite its low hazard potential, the Mill Picayune Watershed Site S-32-1 is considered to have a moderate risk level due to its condition assessment being listed as "Not Rated." The dam's spillway type is uncontrolled, and it has a drainage area of 0.26 square miles. The site has a surface area of 5.6 acres and a normal storage capacity of 43 acre-feet. While the dam has not been modified in recent years and lacks an Emergency Action Plan, it remains a key component in the overall water resource management strategy for the area.

As a part of the Rock Island District, the Mill Picayune Watershed Site S-32-1 is an essential infrastructure for the community's water needs. With its strategic location and multiple purposes, including flood risk reduction, this earth dam continues to play a vital role in maintaining the balance of water resources in Harrison County, Iowa.