Thomson Dam No 12, located in Duluth, Minnesota, is a vital structure in the management of the St. Louis River. Completed in 1907, this earth dam stands at a height of 12 feet and has a length of 450 feet, providing hydroelectric power generation along with recreational opportunities. With a storage capacity of 4352 acre-feet and a surface area of 375 acres, Thomson Dam No 12 plays a significant role in water resource management in the region.

Managed by the Federal Energy Regulatory Commission, Thomson Dam No 12 is subject to regular inspections to ensure its safety and functionality. The dam has a high hazard potential, highlighting the importance of proper risk assessment and management measures. Despite its age, Thomson Dam No 12 continues to serve its purpose efficiently, contributing to the water supply and energy needs of the local community.

As a key component of the water infrastructure in Carlton County, Thomson Dam No 12 is a critical asset for both water resource management and climate resilience efforts. Its strategic location and design make it a valuable resource for both hydroelectric power generation and recreational activities. With ongoing regulatory oversight and maintenance, Thomson Dam No 12 remains a cornerstone of the region's water management system, ensuring the continued safety and sustainability of the St. Louis River ecosystem.