Frd No 99, also known as Upper Black Vermillion WS Site 99, is a flood risk reduction structure located in Nemaha, Kansas. Owned by the local government, this dam was designed by USDA NRCS and completed in 1979. With a primary purpose of flood risk reduction, Frd No 99 is a crucial infrastructure that helps protect the surrounding area from potential flooding events.

This earth dam stands at a height of 32 feet and has a hydraulic height of 29 feet. It has a storage capacity of 101.43 acre-feet and covers a surface area of 3.81 acres. The dam is equipped with an uncontrolled spillway that is 40 feet wide, allowing for a maximum discharge of 177 cubic feet per second. Despite its low hazard potential and moderate risk assessment, the condition and inspection frequency of Frd No 99 are currently not rated.

Situated along the N Fork Black Vermillion River, Frd No 99 plays a crucial role in managing water resources and mitigating flood risks in the region. With its strategic location and design features, this dam serves as a key asset in the overall water resource management efforts in Nemaha, Kansas. As climate change continues to impact the frequency and intensity of extreme weather events, infrastructure like Frd No 99 will be essential in safeguarding communities and ecosystems from potential flooding disasters.