Thompson Mtis, also known as Bruno Creek Dam, is a privately owned structure located in Custer, Idaho, near the city of Clayton. The dam was completed in 1982 and serves the primary purpose of containing tailings from mining operations. Situated along the Bruno Creek and Squaw Creek, this dam has a height of 789 feet and a storage capacity of 895,000 acre-feet, with a surface area of 320 acres and a drainage area of 2.8 square miles.

This dam is regulated by the Idaho Department of Water Resources and undergoes regular inspections to ensure its structural integrity. With a high hazard potential and fair condition assessment, the Thompson Mtis dam poses risks that are closely monitored. Although there are no spillways, the dam is equipped with other controlled outlet gates for water release. The surrounding area is at risk of inundation, prompting the need for emergency action plans and risk management measures to be in place.

Overall, Thompson Mtis represents an important water resource infrastructure in the region, playing a crucial role in managing tailings and preventing potential hazards. Its presence highlights the intersection between water resource management, climate considerations, and the need for effective regulatory oversight to ensure the safety and sustainability of such structures in the face of changing environmental conditions.