Public Notice

May 3, 2004

IJC extends authority for peaking and ponding in St. Marys River

The International Joint Commission (IJC) announced today that it has extended the authority for the Edison Sault Electric Company and Great Lakes Power Ltd. to conduct peaking and ponding operations in the St. Marys River, under the supervision of the IJC’s International Lake Superior Board of Control (the Board of Control), until March 20, 2006.

Peaking and ponding operations are carried out by the power companies to store water during times of off-peak demand and increase hydroelectric power generation during times of on-peak demand. Peaking is the variation of hourly flows within the daily average flow while ponding is the variation of daily flows within the weekly average flow (i.e. higher weekday flows and lower weekend flows).

The IJC made the decision to extend the authority after considering a January 27, 2004 report to the IJC by its International Lake Superior Board of Control and public comment received on this matter of peaking and ponding operations.

The International Joint Commission is an international organization established by the Boundary Waters Treaty of 1909 to prevent and resolve disputes over the use of waters shared by the United States and Canada. More information is available on the IJC’s website at:


Frank Bevacqua Washington (202) 736-9024
Fabien Lengellé Ottawa (613) 995-0088

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