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Current Great Lakes Diversions

Contact:  Jim Bredin 517-335-4232
Agency: Environmental Quality


Existing Diversions

Date Operational

Average Annual Flow

              CM/S                                     CF/S

Interbasin

Longlac, Ontario (into Lake Superior)

1939

45

1,590

Ogoki, Ontario (into Lake Superior)

1943

113

3,990

Chicago, Illinois (out from Lake Michigan)

1900

91

3,200

Forrestport, New York (out of Lake Ontario)

1825

3

120

Portage Canal, Wisconsin (into Lake Michigan)

1860

1

50

Pleasant Prairie, Wisconsin (out of Lake Michigan)

1990

0.1

5

Akron, Ohio (out of and into Lake Erie)

1998

0.1

6

Intrabasin

Welland Canal

1932

260

9,200

New York State Barge Canal (Erie Canal)

1918

20

700

Detroit

1975

4

145

London

1967

3

110

Raisin River

1968

0.7

25

Haldimand, Ontario

1997

0.1

2

CM/S = Cubic Meters/Second        CF/S = Cubic Feet/Second
Source:  International Joint Commission

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Related Content
 •  Lake Michigan Diversion Consent Decree Summary (Wisconsin v. Illinois) PDF icon
 •  Lake Michigan Diversion Consent Decree Summary PDF icon
 •  Great Lakes Charter
 •  Great Lakes Charter Annex 2001 (pdf file) PDF icon
 •  Water Resources Development Act of 1986
 •  Boundary Waters Treaty of 1909

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