Frd No 47, also known as Upper Black Vermillion WS Site 47, is a flood risk reduction structure located in Vermillion, Kansas. Constructed in 1975 by the USDA NRCS, this earth dam stands at a height of 35 feet and has a length of 870 feet. With a primary purpose of flood risk reduction, Frd No 47 has a storage capacity of 182 acre-feet and a drainage area of 0.49 square miles.

Owned by the local government and regulated by the Kansas Department of Agriculture, Frd No 47 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. The dam features an uncontrolled spillway with a width of 50 feet and has not been modified since its completion. Despite its moderate risk assessment rating, Frd No 47 serves as a vital structure in protecting the surrounding area from potential flooding events along the Black Vermillion River.

Water resource and climate enthusiasts will appreciate the detailed information provided for Frd No 47, including its design specifications, purpose, location, and regulatory oversight. This structure serves as a key component in the flood risk reduction efforts in Nemaha County, Kansas, and highlights the importance of proper infrastructure in mitigating the impact of natural disasters. With its low hazard potential and moderate risk assessment rating, Frd No 47 stands as a testament to the proactive measures taken to protect communities and water resources in the region.