NORTHWESTERN DIVISION

• Normal full pool: 749.5 meters (2,459 feet)
• Normal minimum pool: 697.0 meters (2,287 feet)
• Surface area at full pool: 18,830 hectares (46,500 acres)
• Total storage capacity: 7.2 kilometers³ (5,869,000 acre-feet)
• Usable storage capacity 6.1 kilometers³ (4,980,000 acre-feet)

Dam, Concrete Gravity

• Deck Elevation: 753.5 meters (2,472 feet)
• Length: 916.0 meters (3,055 feet)
• Approximate height above foundation: 112.8 meters (370 feet)
• Maximum spillway capacity: 4,106 meters³/sec (145,000 cfs)
• Maximum low level outlets capacity: 1,730 meters³/sec (61,000 cfs)

Power Facilities

• Designed ultimate installation: 8 units at 105 MW total 840 MW
• Currently installed: 5 units at 120 MW total 600 MW
• Date power commercially available: August 24, 1975
• Head at full pool: 107.0 meters (352 feet)
• Maximum turbine discharge of 5 units at full pool: 745.6 meters³/sec (26,500 cfs)

More information on Libby Dam is available from the USACE, Seattle District.