Libby Dam DC Boards and Breakers, Libby, MT

The Seattle District, U.S. Army Corps of Engineers proposes to construct upgrades to Libby Dam DC Boards and Breakers. Libby Dam was completed in 1973 with various replacements and upgrades to the electrical system occurring since then. The existing DC and Preferred AC architecture consists of 125VDC, 24/48VDC, and critical 120VAC systems. These existing systems provide power to loads that are crucial for the project’s operation but lack equipment redundancy. The current system has multiple single points of failure that would affect the plants generation and safety. Furthermore, the equipment is unable to be taken down for maintenance, causing plant personnel and contractors to perform work on energized equipment.