Dd No A-1, also known as Cimarron WS Dam A-1, is a vital water resource infrastructure located in Gray County, Kansas. Owned by the local government and regulated by the Kansas Department of Agriculture, this earth dam was completed in 1961 with the primary purpose of flood risk reduction along the Arkansas River. Standing at a height of 21.8 feet and a length of 1390 feet, Dd No A-1 has a storage capacity of 429 acre-feet and serves a drainage area of 1.59 square miles.

Despite its importance in flood control, Dd No A-1 is currently assessed to be in poor condition with a high hazard potential. The dam lacks outlet gates and has an uncontrolled spillway with a width of 100 feet. With a moderate risk rating, it is crucial for the local government to implement risk management measures and conduct regular inspections to ensure the safety and integrity of the structure. The dam's last inspection was conducted in March 2020, with a frequency of 3 years.

As climate change continues to impact water resources and infrastructure, maintaining and upgrading structures like Dd No A-1 becomes increasingly critical. With its strategic location and significant role in flood risk reduction, this dam serves as a reminder of the importance of proactive management and investment in sustainable water resource projects to adapt to changing environmental conditions and protect communities from potential disasters.