Dd No 18, located in Lyon County, Kansas, is a crucial structure for flood risk reduction along the Allen Creek-TR river. Constructed in 2006, this earth dam stands at a height of 28.6 feet and has a storage capacity of 800.7 acre-feet. With a spillway width of 100 feet, it is designed to handle a maximum discharge of 2789.6 cubic feet per second.

Owned and regulated by the Kansas Department of Agriculture, Dd No 18 is subject to regular inspections and enforcement to ensure its functionality and safety. The dam's hazard potential is considered significant, with a very high risk assessment rating. Despite its fair condition, the structure plays a vital role in controlling debris and reducing flood risks in the area.

Designed by Ron Kuhn, Dd No 18 is a testament to effective water resource management and climate resilience efforts in Kansas. Its presence highlights the importance of investing in infrastructure to protect communities from the impacts of extreme weather events and ensure a sustainable future for all.