Dd No C-18, located in Anderson County, Kansas, is a locally owned earth dam designed by USDA-SCS for flood risk reduction on Elm Creek. Completed in 1979, this dam stands at a height of 17.2 feet and has a storage capacity of 346.7 acre-feet, with a normal storage level of 62.1 acre-feet. The dam spans 1530 feet in length and has a surface area of 16.3 acres, serving as a key infrastructure for protecting the surrounding area from potential flooding events.

Managed by the Kansas Department of Agriculture, Dd No C-18 is equipped with an uncontrolled spillway, 40 feet in width, to manage excess water flow during heavy rainfall. Despite being classified as having a low hazard potential, the dam is regularly inspected to ensure its structural integrity and functionality. With a moderate risk rating of 3, the dam receives ongoing risk management measures to mitigate potential emergencies and safeguard the community downstream. Overall, Dd No C-18 plays a critical role in water resource management and climate resilience efforts in the region.