The Upper Little Trimbelle Group is a privately owned flood risk reduction dam located in Pierce, Wisconsin. Built in 1976 by the USDA NRCS, this earth dam stands at a height of 23 feet and spans 480 feet along Tr-Little Trimbelle Creek. With a storage capacity of 56 acre-feet, the dam serves to protect the surrounding area from potential flooding events.

Managed by the Natural Resources Conservation Service, the Upper Little Trimbelle Group has a low hazard potential and a moderate risk assessment rating. Despite its age, the dam's condition assessment is not available, and it has not been inspected in recent years. In case of emergencies, an emergency action plan has not been prepared, and the dam does not currently meet guidelines for inundation maps or risk management measures.

Climate and water resource enthusiasts may find the Upper Little Trimbelle Group to be an interesting case study in flood risk reduction infrastructure. With its long history and unique design features, this dam provides valuable insights into the challenges and opportunities associated with managing water resources in rural areas. Further research and monitoring of this dam could help inform future decision-making processes related to climate resilience and disaster preparedness in the region.