Upper Watertown, located in the city of Watertown, Wisconsin, is a private hydroelectric dam on the Rock River that was completed in 1909. This buttress dam stands at a height of 12 feet and has a length of 278 feet, with a storage capacity of 720 acre-feet and a normal storage level of 550 acre-feet. With a low hazard potential and moderate risk assessment, this dam is regulated by the Federal Energy Regulatory Commission and permitted by the state, but not inspected by the state agency.

The dam features an uncontrolled spillway with a width of 173 feet and 12 slide (sluice gate) outlet gates. Although the condition assessment is not available, an emergency action plan was last revised in March 2021. The dam poses a moderate risk, but meets guidelines for emergency preparedness and does not have inundation maps prepared. Despite its age, Upper Watertown continues to be a key structure for water resource management, highlighting the intersection of history, engineering, and climate resilience in the region.

With its rich history, unique design features, and critical role in hydroelectric power generation, Upper Watertown is a fascinating site for water resource and climate enthusiasts. The dam's location on the Rock River, its association with the Federal Energy Regulatory Commission, and its low hazard potential make it a noteworthy structure for those interested in the intersection of water management, infrastructure, and environmental stewardship. As efforts to address climate change and promote sustainable energy sources continue, Upper Watertown serves as a reminder of the important role that historic dams play in our modern water infrastructure systems.