Thomson Dam No 8, located in Thomson, Minnesota, is a key structure along the St. Louis River designed primarily for hydroelectric power generation and recreational activities. Built in 1907, this earth and gravity dam stands at a height of 12 feet and spans 100 feet in length, with a storage capacity of 4352 acre-feet and a surface area of 375 acres. Despite being regulated by the State of Minnesota and the Federal Energy Regulatory Commission, the dam has a low hazard potential and undergoes inspections every three years to ensure its structural integrity.

With a total of 13 associated structures, including various reservoirs and outlets, Thomson Dam No 8 plays a crucial role in water resource management in the region. The dam is situated in Carlton County, Minnesota, under the jurisdiction of the St. Paul District of the US Army Corps of Engineers. Despite its age, the dam remains a vital component of the local water infrastructure, supporting both energy production and recreational opportunities for residents and visitors alike.

In the event of an emergency, the dam has an Emergency Action Plan (EAP) in place, last revised in 2001, to guide response efforts and ensure public safety. While the condition assessment of the dam is currently not available, regular inspections and risk assessments are conducted to monitor its performance and identify any potential issues. Overall, Thomson Dam No 8 stands as a testament to the enduring importance of water resource management and climate resilience in the face of changing environmental conditions.