The Upper Trappe River Flowage, also known as Motl 3, is a state-owned dam located in Langlade, Wisconsin. Completed in 1969, this earth dam stands at a height of 12 feet and has a hydraulic height of 4 feet. With a storage capacity of 610 acre-feet, the dam serves to regulate the flow of the Trappe River and provides important water resource management in the area.

Covering a surface area of 41 acres and draining an area of 8.2 square miles, the Upper Trappe River Flowage plays a crucial role in flood control and water supply for the region. The dam features a controlled spillway with a width of 134 feet, ensuring the safe release of excess water during high flow events. Despite its low hazard potential and fair condition assessment, the dam has a very high risk ranking, highlighting the importance of regular inspections and maintenance to ensure its continued safety and effectiveness.

Managed by the Wisconsin Department of Natural Resources (WIDNR), the Upper Trappe River Flowage is a key component of the state's water infrastructure. With its strategic location and vital role in water resource management, this dam serves as a valuable asset for both the environment and the community it serves.