Keenlyside Dam and Arrow Lake

Construction began in March 1965 and storage became fully operational October 10, 1968

Reservoir Elevations

• Normal full pool: 440 meters (1,444 feet)
• Normal minimum pool: 420 meters (1,377.9 feet)
• Surface area at full pool: 52,500 hectares (130,000 acres)
• Total storage capacity: 10.3 kilometers³(7,100,000 acre-feet)
• Treaty storage commitment: 8.8 kilometers³ (7,100,000 acre-feet)

Dam, Concrete Gravity and Earthfill

• Crest Elevation: 445 meters (1,459 feet)
• Length: 869 meters (2,850 feet)
• Approximate height above riverbed: 52 meters (170 feet)
• Maximum spillyway capacity: 6,700 meters³/sec (240,000 cfs)
• Maximum Low level outlets capacity: 3,740 meters³/sec (132,000 cfs)

Power Facilities

The Arrow Lakes Generating Station at Keenlyside Dam was constructed from 1999 to 2002 for the Columbia Power Corporation.

• Designed ultimate installation: 2 units at 92.5 MW total 185 MW
• Currently installed: 2 units at 92.5 MW total 185 MW
• Date power commercially available: 2002
• Head at full pool: 23.6 meters (77 feet)
• Maximum turbine discharge: 1,200 meters³/sec (42,400 cfs)

Read more information about BC Hydro's Columbia Region Facilities.