Cortner is a private dam located in Shelbyville, Tennessee, along Thompson Creek. Built in 1954, this earth dam stands at a structural height of 20.4 feet and serves the primary purpose of water storage. With a normal storage capacity of 45 acre-feet and a maximum storage of 55 acre-feet, Cortner covers a surface area of 6 acres and drains an area of 0.2 square miles.

While Cortner has a low hazard potential, its risk assessment is rated as moderate. The dam features an uncontrolled spillway and has not been inspected since May 2017, with an inspection frequency of 5 years. Despite its moderate risk, Cortner is not currently regulated, permitted, or inspected by the state, indicating potential vulnerabilities in terms of safety and maintenance. For water resource and climate enthusiasts, Cortner presents an intriguing case study of a privately owned dam with notable characteristics and risk factors that warrant further consideration and evaluation.