Frd No 3-6, also known as Upper Verdigris WS Dam 3 6, is a local government-owned structure located in Lyon County, Kansas. Built in 1962 by the USDA NRCS, this earth dam stands at a height of 31 feet and spans a length of 1080 feet. Its primary purpose is flood risk reduction along the North Branch Verdigris River.

With a normal storage capacity of 51 acre-feet and a maximum discharge of 899 cubic feet per second, Frd No 3-6 plays a crucial role in managing water flow in the area. Despite its low hazard potential and moderate risk assessment, the dam's condition has not been rated. The dam features an uncontrolled spillway with a width of 40 feet and is under state regulation by the Kansas Department of Agriculture.

Water resource and climate enthusiasts will appreciate Frd No 3-6 for its significant contribution to flood risk reduction in the region. Its location in the heart of Kansas, along with its design and construction by the USDA NRCS, highlights the importance of effective water management infrastructure in safeguarding communities from potential disasters. As a state-regulated structure with a long history of service, Frd No 3-6 stands as a testament to the ongoing efforts to protect the environment and promote sustainable water resource management practices.