Frd No 4 is a dam located in Leroy, Coffey County, Kansas, that serves as a critical infrastructure for flood risk reduction along the North Big Creek. Built in 1991, this earth dam stands at a height of 32 feet and spans a length of 2100 feet, with a storage capacity of 1282 acre-feet. Despite its low hazard potential, the dam is regulated by the Kansas Department of Agriculture and undergoes regular inspections to ensure its structural integrity and functionality.

Owned and operated by the local government, Frd No 4 is designed to withstand moderate risk levels and is equipped with an uncontrolled spillway with a width of 40 feet to manage excess water flow during heavy rainfall events. The dam's primary purpose is flood risk reduction, reflecting its crucial role in protecting the surrounding area from potential inundation. With a drainage area of 3.04 square miles, the dam covers a surface area of 24.6 acres and has a normal storage level of 105.1 acre-feet, highlighting its significance in water resource management in the region.

Overall, Frd No 4 stands as a testament to the collaborative efforts between local and state agencies in ensuring the safety and resilience of the community against natural disasters. With its strategic location and design features, this dam plays a vital role in safeguarding both property and lives from the impacts of flooding, showcasing the importance of reliable water infrastructure in mitigating climate-related risks.