Dd No 40, located in Greenwood County, Kansas, is a local government-owned earth dam that was completed in 1978 for flood risk reduction. This dam has a height of 36 feet and a storage capacity of 513 acre-feet, with a normal storage level of 65.58 acre-feet. The dam covers a surface area of 11.9 acres and serves a drainage area of 1.5 square miles.

Despite its low hazard potential, Dd No 40 is regulated by the Kansas Department of Agriculture and undergoes regular state inspection, permitting, and enforcement. The dam is equipped with an uncontrolled spillway that is 40 feet wide, and there are no outlet gates or associated structures. While the condition assessment of the dam is currently listed as "Not Rated," it is considered to have a moderate risk level (3) according to the available data.

Overall, Dd No 40 plays a crucial role in mitigating flood risks in the region and highlights the importance of maintaining and monitoring infrastructure for water resource management and climate resilience. Its location, design, and purpose underscore the collaborative efforts between local government agencies and state regulatory bodies to safeguard communities and infrastructure from potential water-related hazards.