East Fork Big Creek Watershed Site Z-6 in Decatur County, Iowa, is a local government-owned structure designed by USDA NRCS to manage flood risk in the area. Completed in 2003, this earth dam stands at 18 feet tall and stretches 505 feet in length, providing storage for up to 61 acre-feet of water. Situated on Zadie Creek, this dam plays a crucial role in reducing the risk of flooding in the region.

With a low hazard potential and a moderate risk assessment rating, East Fork Big Creek Watershed Site Z-6 is regulated, permitted, inspected, and enforced by the Iowa Department of Natural Resources. The dam's primary purpose is flood risk reduction, with a spillway width of 1 foot and uncontrolled spillway type. The structure's condition assessment is currently not rated, with no emergency action plan in place as of the last update in May 2021.

Water resource and climate enthusiasts will appreciate the strategic location of East Fork Big Creek Watershed Site Z-6, its importance in flood management, and the collaborative efforts of local government and USDA NRCS in its design and construction. As a key component in the region's water resource infrastructure, this earth dam serves as a vital tool in protecting communities and the environment from the impacts of extreme weather events and ensuring sustainable water management in Decatur County, Iowa.