Frd No 20, also known as Wakarusa Watershed Dist 35 Frd 20, is a flood risk reduction structure located in Shawnee, Kansas. Owned by the local government and regulated by the Kansas Department of Agriculture, this dam was completed in 1978 by the USDA NRCS. Standing at a height of 40 feet with a hydraulic height of 37 feet, this buttress dam spans 895 feet and has a storage capacity of 409 acre-feet.

The primary purpose of Frd No 20 is flood risk reduction, serving to protect the surrounding area from potential flooding events. With a low hazard potential and a condition assessment that is currently not rated, this structure plays a crucial role in managing water resources in the region. Although the dam has not been inspected recently, it is designed to meet regulatory standards and is equipped with outlet gates to control water flow.

Despite its age, Frd No 20 continues to function effectively in reducing flood risks and safeguarding the community. As climate change brings about more extreme weather events, structures like Frd No 20 become increasingly important in mitigating the impacts of flooding and ensuring the resilience of water resources in the area. With its history of successful flood risk reduction and ongoing regulatory oversight, Frd No 20 remains a vital asset in the region's water management infrastructure.