Located in Osage, Kansas, Dd No 120 is a local government-owned dam designed by King Engineering for flood risk reduction along the Salt Creek-TR river. With a dam height of 30.5 feet and a length of 935 feet, this earth dam provides a storage capacity of 350 acre-feet and serves a drainage area of 0.76 square miles. Completed in 2006, the dam has a spillway width of 50 feet and is classified as having a significant hazard potential.

The dam's condition is assessed as satisfactory, with inspections conducted every 5 years. While the risk assessment is moderate, the dam does not have an emergency action plan in place. The regulatory oversight of Dd No 120 falls under the Kansas Department of Agriculture, ensuring that the dam meets state permitting, inspection, and enforcement standards. Overall, this dam plays a crucial role in mitigating flood risks in the region and highlights the importance of effective water resource management in the face of changing climate conditions.