Located in Coffey, Kansas, the 1-33 dam, also known as Ksnoname 424, is a privately owned structure designed by USDA NRCS. This earth dam primarily serves the purpose of flood risk reduction along the Long Creek-TR river or stream. Standing at a height of 23.2 feet and stretching 1060 feet in length, the dam has a storage capacity of 220.9 acre-feet and covers a surface area of 9.13 acres.

The 1-33 dam is equipped with an uncontrolled spillway that is 40 feet wide, with no outlet gates or associated structures. Despite being rated as having a low hazard potential, the dam's condition has not been officially assessed. Its risk assessment is moderate, with a DSAC (Dam Safety Action Classification) not yet assigned. While the last inspection was conducted in July 2017, there is no set inspection frequency or emergency action plan in place. Overall, the 1-33 dam plays a crucial role in mitigating flood risks in the region and warrants continued monitoring and maintenance to ensure public safety and environmental protection.