Saint Lawrence Seaway


Also found in: Dictionary, Thesaurus, Wikipedia.

Saint Lawrence Seaway,

international waterway, 2,342 mi (3,769 km) long, consisting of a system of canals, dams, and locks in the St. Lawrence River and connecting channels between the Great Lakes; opened 1959. It provides passage for oceangoing vessels into central North America. The seaway includes a 27-ft (8-m) deep waterway, a canal, and seven locks between the port of Montreal and Lake Ontario; a 27-ft (8-m) channel and eight locks through the Welland Ship CanalWelland Ship Canal,
27.6 mi (44.4 km) long, SE Ont., Canada, connecting Lake Ontario with Lake Erie and bypassing Niagara Falls. Built between 1914 and 1932 by Canada to replace a canal opened in 1829, it can accommodate (minimum depth 27 ft/8 m) the largest lake ships.
..... Click the link for more information.
; and the Sault Sainte Marie CanalsSault Sainte Marie Canals,
two ship canals bypassing the rapids on the St. Marys River between Lake Superior and Lake Huron, at the cities of Sault Ste Marie, Mich. and Ont. The Canadian canal (1.4 mi/2.3 km long and 60 ft/18 m wide), which has one lock, was opened in 1895.
..... Click the link for more information.
 and locks.

The seaway has created a fourth seacoast accessible to the industrial and agricultural heartland of North America and has brought oceangoing vessels to lake ports such as Buffalo, Cleveland, Toledo, Detroit, Chicago, Milwaukee, Duluth, and Toronto. The maximum vessel size is 730 ft (223 m) in length with a cargo capacity of 28,000 tons. The shipping season has been extended to 250 days (mid-April to mid-December) by increased use of icebreakers and air pumps to control ice formation in the locks. Iron ore, wheat, and coal are the principal cargoes carried on the seaway.

Construction of the project was authorized by Canada in 1951 and by the United States in 1954. The St. Lawrence Seaway Authority was charged with construction and maintenance of required facilities in Canada; the St. Lawrence Seaway Development Corporation was responsible for facilities in the United States. Principal new locks on the St. Lawrence River section of the seaway are, from east to west, St. Lambert (18 ft/5.5 m lift); Côte Ste Catherine (30 ft/9.1 m), which enables vessels to bypass the Lachine Rapids; Lower and Upper Beauharnois (82 ft/25 m, including the Beauharnois Canal built in 1932); Bertrand H. Snell (45 ft/13.7 m); Dwight D. Eisenhower (38 ft/11.6 m); and Iroquois Guard Lock (3 ft/91 cm). Hydroelectric facilities were integrated with the project and developed and operated by the Power Authority of the State of New York and the Hydro-Electric Power Commission of Ontario. One serious unexpected side effect of the seaway has been the introduction of invasive nonnative aquatic species, such as the zebra and quagga musselsmussel,
edible freshwater or marine bivalve mollusk. Mussels are able to move slowly by means of the muscular foot. They feed and breathe by filtering water through extensible tubes called siphons; a large mussel filters 10 gal (38 liters) of water per day.
..... Click the link for more information.
, into the Great Lakes and from there into other inland waterways.

Bibliography

See C. Mabee, The Seaway Story (1961), L. Thomas, Story of the St. Lawrence Seaway (1972), and G. Sussman, The St. Lawrence Seaway (1978).

Saint Lawrence Seaway

an inland waterway of North America, passing through the Great Lakes, the St Lawrence River, and connecting canals and locks: one of the most important waterways in the world. Length: 3993 km (2480 miles)
References in periodicals archive ?
Georges is a founding member of the Government and chair of the Government's committee of the Saint Lawrence Seaway Management Corporation from its creation, as mentioned, from July of 1998 to August 2006.
As we all know, for anyone who lives in the Great Lakes area and the Seaway area, the reason that we are successful, the reason we were built here originally was because we are on the water, and our water connects us through the Saint Lawrence Seaway to the rest of the world.
Next example of inefficiency in the Seaway system: to get into the Great Lakes, you have to go through the Saint Lawrence Seaway.
Rear Admiral Peter Neffenger is the operational commander of the Ninth Coast Guard District, which spans the five Great Lakes, Saint Lawrence Seaway and parts of the surrounding states, including 1,500 miles of international border.
We are proud to see the Saint Lawrence Seaway Development Corporation earn this years Green Marine certification, and look forward to their continued leadership and progress in this area.
The SLSDC and its Canadian counterpart, the Saint Lawrence Seaway Management Corporation, chose to have their 2015 results published as a single entry in the Green Marine Performance Report, reflecting the bi-national nature of the Seaway and the two agencies close working relationship in pursuit of environmental excellence.
Melchner led and managed the audit and criminal investigative activities of the department, which included oversight of the Coast Guard, the Federal Aviation Administration, the Federal Highway Administration, the Federal Railway Administration, the Urban Mass Transit Administration, and the Saint Lawrence Seaway Corporation.
Administrator, Saint Lawrence Seaway Development Corporation
The Saint Lawrence Seaway Development Corporation operates and maintains a safe, reliable, and efficient waterway for commercial and noncommercial vessels between the Great Lakes and the Atlantic Ocean.
The Saint Lawrence Seaway Development Corporation (SLSDC) operates and maintains a safe, reliable, and efficient waterway for commercial and noncommercial vessels between the Great Lakes and the Atlantic Ocean.
The Saint Lawrence Seaway Development Corporation (SLSDC) is a wholly owned government corporation created by statute May 13, 1954, to construct, operate and maintain that part of the St.