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56 GREAT LAKES<br />
90°W Lake 87°W 84°W 81°W 78°W 75°W<br />
Nipigon<br />
Duluth<br />
Great Lakes<br />
Thunder Bay 169 Thunder Bay<br />
Elevation Length Locks Depth<br />
Milwaukee 645 539 Milwaukee<br />
Lake Ontario 75m 311km - -<br />
Chicago 702 596 374 Chicago<br />
Welland Canal 99m 21km 8 8.30m<br />
Lake Erie 175m 388km - -<br />
Detroit 630 525 493 550 Detroit<br />
St. Clair River 176m 23km - 8.37m<br />
Slate Marathon<br />
Lake Huron 177m 332km - -<br />
Thunder Bay<br />
Islands<br />
Buffalo 857 750 719 776 227 Buffalo Lake Michigan 177m 494km - -<br />
Kingston 1003 898 866 922 373 182<br />
St. Mary's River 177m 45km 3 8.37m<br />
Lake Superior 184m 563km - -<br />
Largest vessel to Duluth / Chicago:<br />
Isle<br />
Royale<br />
Michipicoten Harbour<br />
Draught . . . . . . . 7.9m Beam . . . . . . . . . 23.1m<br />
Michipicoten<br />
loa . . . . . . . . . . 222.5m Air draught . . . . . . N/A<br />
Island<br />
Average full navigation season . . .April-December<br />
Nipigon<br />
Lloyd’s Maritime <strong>Atlas</strong><br />
48°N<br />
48°N<br />
MINNESOTA<br />
Taconite Harbour<br />
L a k e S u p e r i o r<br />
Keweenaw<br />
Peninsula<br />
Apostle<br />
Islands<br />
Duluth<br />
Superior<br />
Q U E B E C<br />
C A N A D A<br />
O N T A RI O<br />
Ashland<br />
Gatineau<br />
Sault Ste. Marie<br />
Soo Canals<br />
Ottawa<br />
Spragge<br />
St. Joseph<br />
Island<br />
Lake<br />
Nipissing<br />
St. Mary's<br />
Drummond<br />
Island<br />
Strait of Mackinac North Channel<br />
Escanaba<br />
OTTAWA<br />
45°N<br />
Cornwall<br />
Parry Sound<br />
Main Channel<br />
G e o r g i a n B a y<br />
Manitoulin<br />
Island<br />
Cheboygan<br />
Beaver<br />
Island<br />
L a k e H u r o n<br />
Washington<br />
Island<br />
45°N<br />
Prescott<br />
Ogdensburg<br />
St. Lawrence Seaway<br />
Door<br />
Peninsula<br />
Penetanguishene<br />
Green Ba y<br />
Midland<br />
Lake Simcoe<br />
Kingston<br />
Owen Sound<br />
Collingwood<br />
Manistee<br />
L a k e O n t a r i o<br />
Oshawa<br />
Saginaw Bay<br />
Oswego<br />
Toronto<br />
Goderich<br />
Clarkson<br />
Bay City<br />
0<br />
Scale at 45°N in Nautical Miles<br />
42°N<br />
L a k e E r i e<br />
L a k e M i c h i g a n<br />
W I S C O N S I N<br />
Green Bay<br />
Fox<br />
Manitowoc<br />
Mississippi<br />
Muskegon<br />
Wisconsin<br />
Rochester<br />
Erie Canal<br />
Syracuse<br />
Hamilton<br />
Port Weller<br />
Port Dalhousie St. Catharines<br />
Thorold<br />
Welland<br />
Port Colborne Buffalo<br />
M I C H I G A N<br />
www.lloydsmiu.com<br />
Saginaw<br />
Milwaukee Grand Haven<br />
Madison<br />
London<br />
Sarnia<br />
Port Huron<br />
Grand Rapids<br />
Finger Lakes<br />
Port Stanley<br />
St. Clair<br />
NEW YORK<br />
Lansing<br />
Kenosha<br />
IOWA<br />
Lake<br />
Detroit St. Clair<br />
Windsor<br />
Amherstburg<br />
Rockford<br />
42°N<br />
M E R I C A<br />
Allegheny<br />
Erie<br />
Detroit<br />
Cedar Rapids<br />
Susquehanna<br />
Conneaut<br />
Ashtabula<br />
Monroe<br />
Burns Harbour Toledo<br />
Gary Harbour<br />
Chicago<br />
Scranton<br />
Pelee<br />
Island<br />
I L L I N O I S<br />
U N I T E D S T A T E S O F A<br />
Lorain Cleveland<br />
Huron<br />
120<br />
PENNSYLVANIA<br />
Maumee<br />
INDIANA<br />
78°W<br />
81°W<br />
O H I O<br />
84°W<br />
Fort Wayne<br />
87°W<br />
Illinois<br />
90°W<br />
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