Joss is a privately owned Earth dam located in Lance Creek, Wyoming, with a primary purpose of irrigation. Built in 1918, this structure stands at a height of 24 feet and has a hydraulic height of 19 feet, offering a storage capacity of 538 acre-feet. The dam spans 1060 feet in length and has a spillway width of 200 feet, operating with an uncontrolled spillway type.

Despite its low hazard potential, Joss is currently assessed to be in poor condition as of the last inspection in June 2018. With a moderate risk rating, the dam requires attention to ensure its continued functionality and safety. The inspection frequency is set at 5 years, indicating the need for regular monitoring and maintenance to mitigate any potential risks. For water resource and climate enthusiasts, Joss presents an intriguing case study in the management and maintenance of aging irrigation infrastructure in a dynamic environmental landscape.