Dd No 1-21 (Feathrston) is a local government-owned dam located in Muscotah, Kansas, along the Delaware River. Built in 1984 by Speaker & King, this earth dam stands at a height of 27.1 feet and spans 900 feet in length. With a primary purpose of flood risk reduction, the dam has a storage capacity of 240 acre-feet and covers a surface area of 8.8 acres, serving a drainage area of 0.48 square miles.

The dam is regulated, permitted, inspected, and enforced by the Kansas Department of Agriculture, ensuring its safety and compliance with state regulations. Although the hazard potential is rated as low and condition assessment is not rated, the dam's risk assessment is moderate. With an uncontrolled spillway width of 161 feet and no outlet gates, the dam is designed to manage floodwaters and reduce the risk of inundation in the surrounding area.

Overall, Dd No 1-21 (Feathrston) plays a crucial role in mitigating flood risks and protecting the local community from potential water-related disasters. As a part of the flood risk reduction infrastructure in Kansas, this dam stands as a testament to the importance of water resource management and climate resilience in safeguarding communities against natural hazards.