Frd No 15, also known as Upper Black Vermillion WS Dam 15, is a local government-owned structure in Vliets, Kansas, designed by USDA NRCS and regulated by the Kansas Department of Agriculture. Completed in 1971, this earth dam stands at a height of 28 feet with a hydraulic height of 25 feet and a length of 915 feet. Its primary purpose is flood risk reduction, serving the Black Vermillion River-TR with a drainage area of 0.7 square miles and a storage capacity of 342.6 acre-feet.

With a low hazard potential and a moderate risk assessment rating, Frd No 15 has not been formally rated for its condition assessment. The dam features an uncontrolled spillway with a width of 40 feet and a surface area of 11.65 acres. Despite not having outlet gates, the structure has a normal storage capacity of 62 acre-feet and a maximum storage of 342.6 acre-feet. This dam plays a crucial role in managing flood risks in the region and is subject to state regulation, inspection, and enforcement to ensure its safety and functionality for water resource and climate enthusiasts.