Dd No 109, located in Cottonwood Falls, Kansas, is a local government-owned earth dam designed primarily for flood risk reduction on Diamond Creek. Completed in 2010 by Central Kansas Engineering Consultants and King & Associates, this structure stands at a height of 29 feet and spans 865 feet in length. With a storage capacity of 305 acre-feet, it serves to protect the surrounding area from potential flooding events with a maximum discharge rate of 2940 cubic feet per second.

Maintained by the Kansas Department of Agriculture, Dd No 109 is regulated, permitted, inspected, and enforced by state agencies to ensure its structural integrity and operational effectiveness. Despite having a low hazard potential, the dam is rated as moderate in terms of risk assessment, indicating a need for ongoing monitoring and management. With a spillway width of 100 feet and no outlet gates, the dam is equipped to handle excess water flow during heavy rainfall, mitigating the impact of potential flooding on downstream areas.

As a crucial infrastructure for flood risk reduction in Chase County, Kansas, Dd No 109 plays a vital role in protecting the local community and environment from the adverse effects of extreme weather events. Its strategic location on Diamond Creek and efficient design by experienced engineering consultants demonstrate a commitment to water resource management and climate resilience in the region. With a focus on safety, regulation, and risk assessment, this dam serves as a testament to proactive measures taken to safeguard against potential flooding disasters.