a lack of US control. The seaway opened in 1959 and cost C$470 million, $336.2 million of which was paid by the Canadian government. Elizabeth II, Queen of Canada and American President Dwight D. Eisenhower formally opened the seaway 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. Port of Milwaukee director Harry C. Brockel forecast just before the Seaway opened in 1959 that "The St. Lawrence Seaway will be the greatest single development of this century in its effects on Milwaukee's future growth and prosperity." Lester Olsen, president of the Milwaukee Association of Commerce, said, "The magnitude and potential of the St. Lawrence Seaway and the power project stir the imagination of the world." The seaway's opening is often credited with making the Erie Canal obsolete and causing the severe economic decline of several cities along the canal in Upstate New York. But by the turn of the 20th century, the Erie Canal had already been largely supplanted by the railroads, which had been constructed across New York and could carry freight more quickly and cheaply. Upstate New York's economic decline was precipitated by numerous factors, only some of which had to do with the St. Lawrence Seaway. Under the Canada Marine Act (1998), the Canadian portions of the seaway were set up with a non-profit corporate structure; this legislation also introduced changes to federal ports. 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. The Port of Duluth shipped just over 2.5 million tonnes of grain, which is less than the port typically moved in the decade before the seaway opened Lake Superior to deep-draft oceangoing vessels in 1959. International changes have affected shipping through the seaway. Europe is no longer a major grain importer; large U.S.