Coastal Engineering
Canals

Canals are artificial inland waterways which are used to provide irrigation, water supply and hydroelectric power generation as well as a means of economical transportation. Changes in water levels along the canal require the building of locks to enable vessels to travel from one level to another.

Rideau Canal, CANADA - The Rideau Canal, completed in 1832, is 202 kilometre in length and the oldest continuously operated canal system in North America. It is considered to be one of North America's major 19th century achievements.

The plan to construct a navigable waterway through the wilderness between Lake Ontario and the Ottawa River was conceived after the War of 1812. It was designed to provide a secure supply route from Montréal to Kingston, avoiding the vulnerable St. Lawrence River route.

Davis Locks on the Rideau Canal

Lower Beaveridges on the Rideau Canal

(pictures courtesy of Ken Watson)      More Pictures of the Rideau Canal


The Welland Canal was constructed in 1829 to link Lake Erie with Lake Ontario. A system of eight locks allows ships to go around Niagara Falls. Engineers discovered long ago that by using gravity and water it was possible to hoist huge ships up and over the cliff face of the Niagara. The ship sails into a lock, the gates close, water pours into the lock until the ship reaches the right level, the gates open and the ship sails out. The whole procedure takes around 10 minutes and uses approximately 95.4 million litres of water.


The St. Lawrence Seaway includes the entire length of man made waterway between Lake Ontario and the port of Montréal. All of the Canadian canals were built to last. Some still provide small-boat access and some still provide access by large cruise ships and ships carrying freight.

Trivia:

The St. Lawrence Seaway was formally opened on June 26 in 1959 in ceremonies held at St. Lambert, Quebec. The waterway - which provides access to the Great Lakes from the Atlantic Ocean - was a joint project of the United States and Canada. President Eisenhower and Britain's Queen Elizabeth took part in the dedication ceremonies.


More About Canals

Panama Canal, Grand Canal


Associated sites:

History of the Rideau Canal

The Welland Canal - Info Niagra

    

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