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Several other large lakes and islands make up part of the Great Lakes System.  They drain through the [[Saint Lawrence River]] into the Gulf of Saint Lawrence.  In 1959 the Saint Lawrence Seaway opened the Great Lakes to ocean-going boats, allowing travel well into the heart of North America.  Although the Great Lakes themselves had been connected before this by a series of canals.   

Several other large lakes and islands make up part of the Great Lakes System.  They drain through the Saint Lawrence River into the Gulf of Saint Lawrence.  In 1959 the Saint Lawrence Seaway opened the Great Lakes to ocean-going boats, allowing travel well into the heart of North America.  Although the Great Lakes themselves had been connected before this by a series of canals.   

Since 1909 the United States and Canada have cooperated on the management and control of lake water with the International Joint Commission (IJC). At [[Niagara Falls]], as much as 60% of the water is diverted for [[hydroelectric power]] generation for [[Ontario]] and [[New York State]].

Since 1909 the United States and Canada have cooperated on the management and control of lake water with the International Joint Commission (IJC). At [[Niagara Falls]], as much as 60% of the water is diverted for [[hydroelectric power]] generation for [[Ontario]] and [[New York State]].