Columbia River Treaty: Permanent Engineering Board

Columbia River Treaty

Permanent Engineering Board

Treaty Projects

Key Provisions


Site Map

Internet Links

Contact Us

Treaty Projects
Keenleyside Dam and Arrow Lake
Project Statistics

Storage Project  
Construction began March 1965
Storage became fully operational 10 October 1968
Normal full pool elevation 440 m (1,444 feet)
Normal minimum pool elevation 420 m (1,377.9 feet)
Surface area at full pool 52,500 hectares (130,000 acres)
Total storage capacity 10.3 km3 (8,337,000 acre-feet)
Usable storage capacity 8.8 km3 (7,100,000 acre-feet)
Treaty storage commitment 8.8 km3 (7,100,000 acre-feet)
Dam, Concrete Gravity and Earthfill  
Crest Elevation 445 m (1,459 feet)
Length 869 m (2,850 feet)
Approximate height above riverbed 52 m (170 feet)
Spillway - Maximum capacity 6,700 m3/sec (240,000 cfs)
Low level outlets - Maximum capacity 3,740 m3/sec (132,000 cfs)
Power Facilities  
Designed ultimate installation  
2 units at 92.5 MW 185 MW
Currently installed  
2 units at 92.5 MW 185 MW
Power commercially available 2002
Head at full pool 23.6m (77 feet)
Maximum turbine discharge 1,200 m3/sec (42,400 cfs)
Website Contact: U.S. Army Corps of Engineers Columbia Basin Water Management