Hasen is a private water resource located in Shelby, Tennessee, with a primary purpose of serving as a fire protection, stock, or small fish pond. The dam, primarily made of earth, has a hydraulic height of 14 feet and a structural height of 20 feet, providing a storage capacity of 55 acre-feet. The reservoir covers an area of 4.5 acres and has a spillway type of uncontrolled with a hazard potential rated as low.

Despite not being state regulated or permitted, Hasen poses a moderate risk level of 3 due to its structural condition being not rated. The last inspection conducted in June 2019 revealed the need for a five-year inspection frequency. The dam does not have an Emergency Action Plan (EAP) prepared, and there is no information on whether it meets safety guidelines or has inundation maps prepared. With its location in Memphis District and under the ownership of a private entity, Hasen serves as an intriguing site for water resource and climate enthusiasts to study and monitor.