Kopp is a privately owned dam located on the TR-Little Eau Pleine River in Marathon, Wisconsin. Constructed in 1967, this Earth-type dam stands at a height of 15 feet and has a length of 1120 feet. With a maximum storage capacity of 50 acre-feet and a normal storage of 20 acre-feet, Kopp serves a primary purpose of "Other" with a low hazard potential and a moderate risk assessment.

Managed by the Wisconsin Department of Natural Resources (WIDNR), Kopp is state regulated, permitted, inspected, and enforced. Although the dam has not been rated for its condition assessment, it has a designated inspection frequency of 10 years with the last inspection date recorded in September 2010. Despite its low hazard potential, the dam does not have an Emergency Action Plan (EAP) in place, raising concerns for emergency preparedness in the event of a high-risk situation.

With its location in a rural area and a drainage area of 0.4 square miles, Kopp plays a crucial role in water resource management and flood control along the Little Eau Pleine River. As climate change impacts water resources, enthusiasts are encouraged to monitor the condition and risk assessment of dams like Kopp to ensure the safety and sustainability of our water infrastructure in a changing climate.