Thomson Dam No 5, located in Carlton, Minnesota, is a significant hydroelectric structure built in 1907 with a primary purpose of generating electricity. This gravity dam stands at a height of 23 feet and has a storage capacity of 4,352 acre-feet, providing essential water resources for the surrounding area. The dam is situated on the St. Louis River and is under the regulatory oversight of the Federal Energy Regulatory Commission, ensuring its safe operation and inspection.

With a high hazard potential due to its location and structure, Thomson Dam No 5 is a crucial component of the region's water resource management. The dam also serves recreational purposes, offering a surface area of 375 acres for outdoor activities and enjoyment. Despite its age, the dam's condition assessment is not available, highlighting the need for ongoing monitoring and maintenance to ensure its reliability and safety for both the environment and communities downstream.

Thomson Dam No 5 is part of a network of associated structures and is subject to regular inspections to mitigate risks and manage emergency situations effectively. With its historical significance and essential role in water resource management and hydroelectric power generation, this dam serves as a testament to the ingenuity and engineering capabilities of its time, reflecting the ongoing importance of sustainable water management practices in the face of climate change and evolving environmental challenges.