Niagara River

The Niagara River ( ny-AGG-ər-ə, -⁠grə) flows north from Lake Erie to Lake Ontario, forming part of the border between Ontario, Canada, to the west, and New York, United States, to the east. The river, occasionally described as a strait, is approximately 58 kilometres (36 miles) long and is known for the Niagara Falls. Over the past 12,000 years, the falls have moved roughly 11 kilometres (6.8 mi) upstream from the leading edge of the Niagara Escarpment, creating a gorge below the falls. Today, the diversion of the river for electricity generation has significantly slowed the rate of erosion. The total elevation drop along the river is 99 metres (325 ft). The Niagara Gorge, downstream from the falls, includes the Niagara Whirlpool and additional rapids. Power plants on the river include the Sir Adam Beck Hydroelectric Generating Stations (built in 1922 and 1954) on the Canadian side, and the Robert Moses Niagara Power Plant (built in 1961) on the American side, collectively generating 4.4 gigawatts of electricity. The International Control Dam, constructed in 1954, regulates river flow. Ships on the Great Lakes use the Welland Canal, part of the St. Lawrence Seaway, on the Canadian side of the river, to bypass Niagara Falls. The Niagara River features two large islands and several smaller ones. Grand Island and Navy Island, the two largest, are on the American and Canadian sides, respectively. Goat Island and the small Luna Island divide Niagara Falls into three sections: Horseshoe Falls, Bridal Veil Falls, and American Falls. Unity Island lies further upstream, adjacent to the city of Buffalo. The Niagara River and its tributaries, Tonawanda Creek and the Welland River, formed part of the final section of the Erie Canal and Welland Canal. After leaving Lockport, the Erie Canal heads southwest into Tonawanda Creek. Upon entering...