Galena No 2 Mtis is a private dam located in Silverton, Idaho, with a primary purpose of storing tailings. The dam, constructed with earth and stone materials on rock and soil foundations, stands at a height of 48 feet with a hydraulic height of 45 feet. It has a length of 750 feet and a storage capacity of 60 acre-feet, serving the Lake Creek South Fork Coeur d'Alene River.

The dam is regulated by the Idaho Department of Water Resources and has a significant hazard potential with a fair condition assessment as of June 2019. Despite its moderate risk rating, the dam is inspected annually to ensure its safety and the protection of downstream communities. The spillway is uncontrolled with a width of 4 feet, and the dam is designed to handle a maximum discharge of 36 cubic feet per second.

This vital water resource infrastructure plays a crucial role in managing water flow and storage in the region, highlighting the importance of proper maintenance and monitoring to prevent any potential risks or hazards associated with its operation. For water resource and climate enthusiasts, Galena No 2 Mtis presents an intriguing case study of dam management and regulation in the state of Idaho.