The St. Lawrence Seaway was preceded by several other canals. In 1871, locks on the St. Lawrence allowed transit of vessels long, wide, and deep. The
First Welland Canal, constructed between 1824 and 1829, had a minimum lock size of long, wide, and deep, but it was generally too small to allow passage of larger oceangoing ships. The
Welland Canal's minimum lock size was increased to long, wide, and deep for the Second Welland Canal; to long, wide, and deep with the Third Welland Canal; and to long, wide, and deep for the current (Fourth) Welland Canal. The first proposals for a binational comprehensive deep waterway along the St. Lawrence were made in the 1890s. In the following decades, developers proposed a hydropower project as inseparable from the seaway; the various governments and seaway supporters believed the deeper water to be created by the hydro project was necessary to make the seaway channels feasible for oceangoing ships. U.S. proposals for development up to and including the
First World War met with little interest from the Canadian federal government. But the two national governments submitted St. Lawrence plans to a group for study. By the early 1920s, both the
Wooten-Bowden Report and the
International Joint Commission recommended the project. Although Canada's
Liberal Prime Minister
William Lyon Mackenzie King was reluctant to proceed, in part because of opposition to the project in
Quebec, in 1932 he and the U.S. representative signed a treaty of intent. This treaty was submitted to the
U.S. Senate in November 1932 and hearings continued until a vote was taken on March 14, 1934. The majority voted in favor of the treaty, but it failed to gain the necessary two-thirds vote for ratification. Later attempts between the governments in the 1930s to forge an agreement came to naught due to opposition by the Ontario government of
Mitchell Hepburn and the government of Quebec. In 1936, John C. Beukema, head of the Great Lakes Harbors Association and a member of the Great Lakes Tidewater Commission, was among a delegation of eight from the Great Lakes states to meet at the White House with U.S. President
Franklin D. Roosevelt to obtain his support for the seaway concept. Beukema and St. Lawrence Seaway proponents were convinced a nautical link would lead to the development of the communities and economies of the
Great Lakes region by permitting the passage of oceangoing ships. In this period, exports of grain, along with other commodities, to Europe were an important part of the national economy. Negotiations on the treaty resumed in 1938, and by January 1940 substantial agreement was reached between Canada and the United States. By 1941, President Roosevelt and Prime Minister Mackenzie King made an executive agreement to build the joint hydro and navigation works, but this failed to receive the assent of the
U.S. Congress. Proposals for the seaway were met with resistance; the primary opposition came from interests representing harbors on the
Atlantic and
Gulf Coasts and internal waterways and from the railroad associations. The railroads carried freight and goods between the coastal ports and the Great Lakes cities. After 1945, proposals to introduce
tolls to the seaway were not sufficient to gain support for the project by the U.S. Congress. Growing impatient, and with Ontario desperate for the power to be generated by hydroelectricity, Canada began to consider developing the project alone. This seized the imagination of Canadians, engendering a groundswell of nationalism around the St. Lawrence. On September 28, 1951, Canadian Prime Minister
Louis St. Laurent advised U.S. President
Harry S. Truman that Canada was unwilling to wait for the United States and would build a seaway alone; the
Canadian Parliament authorized the founding of the
St. Lawrence Seaway Authority on December 21 of that year. Fueled by this support, Saint Laurent's administration decided during 1951 and 1952 to construct the waterway alone, combined with the
Moses-Saunders Power Dam. (This became the joint responsibility of Ontario and New York: as a hydropower dam would change the water levels, it required bilateral cooperation.) The International Joint Commission issued an order of approval for joint construction of the dam in October 1952. U.S. Senate debate on the bill began on January 12, 1953, and the bill emerged from the House of Representatives Committee of Public Works on February 22, 1954. It received approval from the Senate and the House by May 1954. The first positive action to enlarge the seaway was taken on May 13, 1954, when U.S. President
Dwight D. Eisenhower signed the Wiley-Dondero Seaway Act to authorize joint construction and establish the
St. Lawrence Seaway Development Corporation as the U.S. authority. The need for cheap haulage of Quebec-
Labrador iron ore was one of the arguments that finally swung the balance in favor of the seaway. Groundbreaking ceremonies took place in
Massena, New York, on August 10, 1954. That year Eisenhower appointed Beukema to the five-member St. Lawrence Seaway Advisory Board. In May 1957, the Connecting Channels Project was begun by the
United States Army Corps of Engineers. By 1959, Beukema was on board the U.S. Coast Guard cutter
Maple for the first trip through the U.S. locks, which opened up the Great Lakes to oceangoing ships. On April 25, 1959, large, deep-draft ocean vessels began streaming to the heart of the North American continent through the seaway, a project supported by every administration from
Woodrow Wilson through Eisenhower. In the United States, N. R. Danelian, worked with the
U.S. Secretary of State on Canadian-U.S. issues regarding the seaway, persevering through 15 years to gain passage by the U.S. Congress of the
Seaway Act. He later became president of the Great Lakes St. Lawrence Association to promote seaway development to benefit the American heartland. The seaway was heavily promoted by the Eisenhower administration, which had been concerned with a lack of US control.
Elizabeth II,
Queen of Canada, Prime Minister John Diefenbaker, and President Eisenhower formally opened the seaway on June 26, 1959 with a short cruise aboard the
royal yacht after addressing crowds in
Saint-Lambert, Quebec. 22,000 workers were employed at one time or another on the project, a superhighway for ocean freighters. Great Lakes and seaway shipping generates $3.4 billion in business revenue annually in the United States. In 2002, ships moved 222 million tonnes of cargo through the seaway. Overseas shipments, mostly of inbound steel and outbound grain, accounted for 15.4 million tonnes, or 6.9%, of the total cargo moved. In 2004, seaway grain exports accounted for about 3.6% of U.S. overseas grain shipments, according to the U.S. Grains Council. In a typical year, seaway steel imports account for around 6% of the U.S. annual total. The toll revenue obtained from ocean vessels is about 25–30% of cargo revenue. == Expansion proposal ==