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CONSTRUCTION BEGAN- 1954
A great example of binational collaboration between
USA and Canada.
End point – Atlantic Ocean
Locks- 15 (13 Canadian, 2 US )
Length – 3700km (2340 miles)
The saint Lawrence seaway is world’s longest deep-
draft inland waterway.
It is a system of locks, canals and channels that
permits ocean going vessels to travel from Atlantic to
the western most end of Great Lakes called lake
Country- United States of America and Canada.
Extension- Montreal (Quebec, Canada) to lake Erie
(smallest volume lake of the Five Great Lakes).
It also includes the WELLAND CANAL (CANADA).
Named after the SAINT LAWRENCE RIVER (Flows
from lake Ontario to Atlantic) .
The channels are maintained at 8.2m (27 ft).
Six locks are located in the St. Lawrence river portion
and Eight locks are located in the Welland canal
portion of the seaway.
The size of vessels that can traverse the seaway is
limited by the size of locks.
The maximum size of a vessel which can traverse the
seaway is :
Length:- 740 ft(225.5 m)
Beam:- 78 ft(23.7m)
Draft:- 26.5 ft(8.08m)
These are formally called Seawaymax.
The seaway is jointly managed by SAINT LAWRENCE
SEAWAY MANAGEMENT CORPORATION of USA &
SAINT LAWRENCE SEAWAY MANAGEMENT
CORPORATION of CANADA.
Currently used for shipping bulk cargo.
Possibility for use of large scale container ships is
Annual commerce on the system exceeds 180 million
There are a total of 24 major ports an a number of
small ports on this system.
MAIN ITEMS EXPORTED
GENERAL CARGO (IRON AND STEEL PRODUCTS
AND HEAVY MACHINERY)
CEMENT, SALT, STONE
PRIMARY VESSELS PASSING
BULK CARRIERS (called GREAT LAKE BULK
CARRIERS or LAKERS):- these transport cargo
between ports on the seaway system.
OCEAN GOING SHIPS (called SALTIES):- ferry cargo
between ports on lakes of the system and overseas
ports.(these serve more than 110 system ports).
TUG PROPELLED BARGES :- carrying container
One 1000 ft GREAT LAKE BULK CARRIER carries
enough iron ore to operate a steel mill for more than
Coal Carried on a GREAT LAKE BULK CARRIER
carries coal to power Great Detroit (AREA:-3267
sq.km.) for ONE DAY.
A SEAWAYMAX moves enough wheat to make bread
for every resident of NEW YORK
Cargo shipments on St. Lawrence Seaway system
generate $34.6 BILLION of economic activity and
227000 jobs in CANADA and USA.
Large money is generated from tourist activities like:
Fishing in Great Lakes (has become a very popular
sport in USA & CANADA).
Thousand Islands of St. Lawrence river attract tourists
from entire world.