Frd No 4, also known as Lakin Watershed Dam 4, is a local government-owned structure in Kearny County, Kansas, designed by the USDA NRCS and regulated by the Kansas Dept. of Agriculture. Completed in 1969, this earth dam stands at 39 feet high with a hydraulic height of 45 feet and a structural height of 50 feet. Its primary purpose is flood risk reduction, serving the Amazon Ditch-TR stream with a drainage area of 2.28 square miles.

With a storage capacity of 1430 acre-feet, Frd No 4 covers a surface area of 12.1 acres and has a maximum discharge rate of 9230 cubic feet per second. The dam's spillway, classified as uncontrolled, features a width of 250 feet. Despite being categorized as having a high hazard potential, the structure is currently in fair condition. Regular inspections occur every three years, with the last assessment conducted in April 2018.

Water resource and climate enthusiasts monitoring Frd No 4 can find valuable information about its design, construction, and regulatory oversight in the provided data. This dam plays a crucial role in mitigating flood risks for the local community in Lakin, Kansas, and its surroundings. With its strategic location and significant storage capacity, Frd No 4 stands as a testament to effective collaboration between federal and state agencies in managing water resources and enhancing climate resilience in the region.