Niagara Falls is comprised of three waterfalls, from largest to smallest, the Horseshoe Falls (also known as the Canadian Falls), American Falls and Bridal Veil Falls. Niagara Falls' vertical height is over 176 feet in some sections.
The American and Bridal Veil Falls were turned off in 1969 by the U.S. Army Corps. of Engineers to study the effects of erosion. There are plans to “turn off” the Falls again to rebuild two, 115-year-old bridges.
Niagara Falls' current erosion rate is approximately 1 foot per year and could possibly be reduced to 1 foot per 10 years due to flow control and diversion for hydro-power generation.
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