After the American Revolution, the need for an all-American water route between the Great Lakes and the Atlantic coast was evident. Political unity, easy and inexpensive transportation, and increased trade (free from Canadian competition) were the anticipated benefits of such a route. Several land surveys followed, and by 1810, the issue was paramount in the New York legislature, where De Witt Clinton lent his political support. A canal commission, including Clinton, Gouverneur Morris, Stephen Van Rensselaer, and Thomas Eddy, recommended (1811) a canal to Lake Erie rather than to Lake Ontario. The canal bill, drawn up by Clinton in 1815, was debated in the legislature (1816-17), with New York City and the Lake Ontario interests opposing it vigorously. Although a presidential veto of a national waterway project forced the proposed canal's financial burden on New York alone, the canal bill passed the state legislature in Apr., 1817.

Work on the canal was carried on by gangs made up, in many cases, of European immigrants. The canal's course was entirely enclosed; streams and lakes were not incorporated into the waterway. The middle section (Utica to Salina) was completed in 1820; the eastern section through the Mohawk River valley was finished in 1823. Elaborate celebrations opened the entire canal in 1825; Clinton and other notables sailed from Buffalo to New York City, where Clinton emptied a barrel of Lake Erie water into the Atlantic Ocean. The canal was enlarged beginning in 1835; its most important branches, the Champlain (opened 1819), the Oswego (1828), and the Cayuga-Seneca (1829), were also enlarged. The Erie Canal contributed to New York City's financial development, opened eastern markets to Midwest farm products and encouraged immigration to that region, and helped to create numerous large cities. Its initial success started a wave of canal building in the United States.

Railroad competition, beginning in the 1850s, eventually destroyed the canal's long-haul advantages; however, for many years the Erie Canal was a profitable route. Tolls were abolished in 1882, however, because of its state of disrepair and to lure more traffic. Although some improvements were made (1884-94), inadequate navigability, the competition of Canadian routes, and the disclosure of fraudulent administration (the "Canal Ring") brought about plans for complete renovation and subsequent conversion (1905-18) into a large, modern barge canal. Unlike the original canal, the revamped waterway incorporated canalized rivers and lakes in the waterway; parallel sections of the old Erie Canal were abandoned. Much tonnage was still shipped via the canal in the 1950s, but the opening of the New York State Thruway and the St. Lawrence Seaway sealed the canal's commercial demise. Traffic now consists almost entirely of pleasure boats; a five-year overhaul in the late 1990s was undertaken to make the canal a major "recreationway."

Lake, in U.S. and Canada. The fourth largest of the five Great Lakes, it lies between lakes Huron and Ontario and forms the boundary between Canada (Ontario) and the U.S. (Michigan, Ohio, Pennsylvania, and New York). It is 240 mi (388 km) long and has a maximum width of 57 mi (92 km), with a surface area of 9,910 sq mi (22,666 sq km). The Detroit River carries inflow from Lake Huron to the west, and the lake discharges at its eastern end through the Niagara River. It is an important link in the St. Lawrence Seaway; its ports handle steel, iron ore, coal, and grain. The area was once inhabited by Erie Indians; when the French arrived in the 17th century they found the Iroquois living there. The British were in the region in the 18th century, and the U.S. shores were settled after 1796. It was the site of the Battle of Lake Erie, an important engagement of the War of 1812.

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Historic waterway, northern U.S. It stretches from Buffalo, N.Y., on Lake Erie to Albany, N.Y., on the Hudson River. Commissioned by Gov. DeWitt Clinton of New York, it opened in 1825. It connected the Great Lakes with New York City and contributed greatly to the settlement of the Midwest, allowing for the transport of people and supplies. Enlarged several times, the canal is 363 mi (584 km) long, 150 ft (46 m) wide, and 12 ft (3.6 m) deep. Now used mainly for pleasure boating, it is part of the New York State Canal System.

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City (pop., 2000: 103,717), northwestern Pennsylvania, U.S. Named for the Erie Indians, it was the site of a French fort (1753) on Lake Erie. The site was acquired by the U.S. in 1795, when the town was laid out. Nearby naval shipyards built most of the fleet that defeated the British at the Battle of Lake Erie (1813) in the War of 1812. Economic development began with the opening (1844) of the Erie and Pittsburgh Canal and with railway construction in the 1850s. Pennsylvania's only port on the St. Lawrence Seaway, it is a shipping point for many products, including lumber, coal, and petroleum. While early industries were largely agricultural, manufactures, including electrical equipment and construction machinery, are now well diversified.

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