Frd No 46, also known as the Upper Black Vermillion WS Site 46, is a local government-owned dam located in Vermillion, Kansas. Constructed in 1976 by the USDA NRCS, this earth dam stands at a height of 36 feet and spans 900 feet in length. Its primary purpose is flood risk reduction along the Black Vermillion River, with a storage capacity of 924.92 acre-feet and a normal storage level of 138 feet.

Managed and regulated by the Kansas Department of Agriculture, this dam has a low hazard potential and a moderate risk assessment rating of 3. It features an uncontrolled spillway with a width of 60 feet and no outlet gates. While it has not been inspected since 2010, the dam is in good condition according to the last assessment. With its location in a rural area and its importance in reducing flood risk, Frd No 46 plays a crucial role in water resource management and climate resilience efforts in Nemaha County, Kansas.

Water resource and climate enthusiasts can appreciate the significance of Frd No 46 in safeguarding the Vermillion community from potential flood events. The dam serves as a vital infrastructure for flood risk reduction, storing water during peak flow periods and releasing it safely downstream. Its construction and maintenance are overseen by the USDA NRCS and the Kansas Department of Agriculture, ensuring its functionality and safety. As climate change continues to impact precipitation patterns and increase the frequency of extreme weather events, Frd No 46 remains a key asset in protecting the local environment and population from the threats of flooding.