Frd No 2-4, also known as Upper Verdigris WS Dam 2 4, is a local government-owned structure located in Lyon, Kansas, specifically in the city of Madison. Completed in 1963, this earth dam stands at a height of 43 feet and has a maximum storage capacity of 2796.92 acre-feet. Its primary purpose is flood risk reduction, with a low hazard potential and a moderate risk assessment rating.

Managed by the USDA NRCS, Frd No 2-4 is regulated by the Kansas Department of Agriculture and is subject to state permitting, inspection, and enforcement. The dam spans a length of 1800 feet and is situated on Shaw Creek, with a drainage area of 5.79 square miles. Despite its uncontrolled spillway type, the structure has not been rated for its condition assessment and lacks an emergency action plan. With a risk management measure of moderate (3), Frd No 2-4 serves as a vital component in the local water resource infrastructure for flood risk mitigation.