Soap Creek Watershed Site 4-98, located in Appanoose County, Iowa, is a vital flood risk reduction structure managed by the local government with assistance from the USDA NRCS. Completed in 2005, this earth dam stands at a height of 33 feet, with a length of 635 feet, and a storage capacity of 657 acre-feet. Situated on Morman Creek, this dam plays a crucial role in stabilizing grades and reducing the risk of flooding in the surrounding area.

The dam, constructed with a stone core and soil foundation, covers a drainage area of 2.31 square miles and has a surface area of 24.1 acres. Classified as having a low hazard potential with a moderate risk assessment rating of 3, this structure is regulated, permitted, and inspected by the Iowa DNR to ensure its functionality and safety. While currently not rated for condition assessment, it serves as a key component in the water resource management strategy for the region.

Managed by the local government and designed by the USDA NRCS, Soap Creek Watershed Site 4-98 is a testament to collaborative efforts in water resource management. With its primary purpose of flood risk reduction and grade stabilization, this earth dam serves as a critical infrastructure to safeguard the community against potential flooding events. Despite its low hazard potential, ongoing regulatory oversight and maintenance ensure the continued effectiveness of this structure in mitigating flood risks in the region.