International Joint Commission (IJC)
More than a century of cooperation protecting shared waters

Columbia River

Osoyoos Lake Board of Control
Zosel Dam, which regulates the level of Osoyoos Lake, was constructed in 1987, replacing an earlier dam. The International Osoyoos Lake Board of Control supervises its operation to ensure compliance with conditions in the IJC’s 1982 order of approval, amended in 1985 and 2013. 
 
 
Kootenay Lake Board of Control
In 1938, the IJC approved construction and operation of the Cora Linn Dam with conditions related to Kootenay Lake levels and outflows. There are also a number of orders pertaining to dikes along the Kootenay River upstream from the lake, as these can affect water levels at the boundary. The International Kootenay Lake Board of Control supervises the operation of the dam and ensures that conditions set for Kootenay Lake are maintained. 


Columbia River Board of Control
In 1941, the IJC issued an order of approval to raise water levels at the boundary behind the Grand Coulee Dam. The International Columbia River Board of Control monitors and reports annually on the effects of the operation of the dam and its reservoir, Franklin D. Roosevelt Lake, on water levels and flows at the boundary. Differences arising under the 1961 Columbia River Treaty, which Canada and the United States cannot resolve, may be referred by either party to the IJC for decision.