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Niagara Falls is the second largest falls on the globe next to Victoria Falls in southern Africa. One fifth of all the fresh water in the world lies in the four Upper Great Lakes-Michigan, Huron, Superior and Erie. All the outflow empties into the Niagara river and eventually cascades over the falls.
The following pictures was taken when Niagara Falls were partially frozen in the year 1911. These are very rare photos.
HOWEVER…. The flow of water was stopped completely over both falls on March 29th 1848 due to an ice jam in the upper river for several hours. This is the only known time to have occurred. The Falls did not actually freeze over, but the flow was stopped to the point where people actually walked out and recovered artifacts from the riverbed!
Until 1912, visitors were allowed to actually walk out on the ice bridge and view the Falls from below. In February 24th of 1888 the local newspaper reported that at least 20,000 people watched or tobogganed on the ice. Shanties selling liquor, photographs and curiosities abounded. On February 4th 1912 the ice bridge broke up and three tourists lives were lost.
There can also be a great deal of “mini-icebergs” which flow down the Niagara River from frozen Lake Erie. The flow of ice has been reduced considerably by the yearly installation of the “ice-boom” on Lake Erie. The ice-boom is a long floating chain (2miles- 3.2 KM) of steel floats strung across the Niagara River from Buffalo New York to Fort Erie Ontario. It is set in place during the month of December and removed during the month of March or April. It is maintained by the New York State Power Authority. The ice boom helps prevent the ice from clogging the river and most importantly the hydroelectric companies water intakes.