Frd No 31, also known as Big Caney Watershed Dam 31, is a local government-owned structure located in Cedar Vale, Kansas. Completed in 1966, this earth dam stands at a height of 69 feet and serves the primary purpose of flood risk reduction along Otter Creek. With a storage capacity of 8919.2 acre-feet and a drainage area of 20.7 square miles, Frd No 31 plays a crucial role in managing water flow and protecting the surrounding areas from potential flooding events.

Managed by the Kansas Department of Agriculture, Frd No 31 has a low hazard potential and is currently rated as not assessed for condition. Despite being uncontrolled, the spillway of this dam has a width of 200 feet to help regulate water levels during periods of high discharge. With a moderate risk assessment score of 3, ongoing risk management measures are in place to ensure the safety and effectiveness of this important water resource infrastructure. Water resource and climate enthusiasts can appreciate the role that Frd No 31 plays in protecting the local community and environment from the impacts of flooding.