Frd No 30, also known as Upper Black Vermillion WS Dam 30, is a local government-owned structure located in Vliets, Kansas. Built in 1971 by the USDA NRCS, this earth dam stands at a height of 33 feet and serves primarily for flood risk reduction along the Black Vermillion River. With a storage capacity of 392 acre-feet and a surface area of 17.02 acres, the dam plays a crucial role in safeguarding the surrounding area from potential flooding events.

Managed by the Kansas Department of Agriculture, Frd No 30 is regulated, permitted, inspected, and enforced by state authorities to ensure its structural integrity and operational effectiveness. Despite being classified as having a low hazard potential, the dam is rated as moderate in terms of risk, highlighting the importance of ongoing monitoring and risk management measures. With a spillway width of 40 feet and a drainage area of 1.12 square miles, the dam is equipped to handle controlled releases during periods of high water flow to mitigate downstream impacts.

The location of Frd No 30 in Marshall County, Kansas, demonstrates the collaborative efforts between federal and state agencies in overseeing the safety and functionality of water resource infrastructure. As part of the Kansas City District, the dam serves as a critical component in the region's flood protection system, showcasing the significance of proactive maintenance and emergency preparedness in safeguarding communities and ecosystems from the impacts of extreme weather events and climate variability.