Dd No 42, located in Greenwood, Kansas, is a flood risk reduction structure with a primary purpose of mitigating potential flooding along Willow Creek-TR. Constructed in 2005, this earth dam stands at a height of 32 feet and spans 1050 feet in length. It has a storage capacity of 1018.49 acre-feet, with a normal storage level of 129.18 acre-feet and a surface area of 30.62 acres.

Managed by the local government and regulated by the Kansas Department of Agriculture, Dd No 42 has a low hazard potential and a moderate risk assessment rating. Despite not being rated for condition assessment, the dam is inspected regularly to ensure its functionality and safety. With a spillway width of 100 feet and a maximum discharge capacity of 2865 cubic feet per second, this structure plays a crucial role in safeguarding the surrounding area from potential flooding events.

Designed by Dale Steward, Dd No 42 serves as a vital infrastructure asset in the region, providing protection against flooding and ensuring the safety of nearby communities. As climate change continues to impact water resources, structures like Dd No 42 play a critical role in mitigating potential risks and protecting the environment and its inhabitants from the adverse effects of extreme weather events.