Current Great Lakes Diversions

Contact: Emily Finnell 517-284-5036

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