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Niagara Falls Dewatered - 1969 From June to November 1969, the American portion of Niagara Falls had its water flow from the Niagara River diverted to Horseshoe Falls on the Canadian side. It was the work of the US Army Corps of Engineers. The reason for the drastic measure was to scientifically study the falls for critical erosion damage. At the time there was a great fear that steady erosion was irretrievably affecting the falls. If the falls eroded to the point where they were not spectacular, the lucrative local tourism industry would suffer badly. The only way to know for sure if the falls were threatened was to examine the limestone precipice without any water present. Accordingly the engineers deftly dumped tons of landfill to block the American side of the falls. The Niagara River's typical discharge of 60,000 gallons of water per minute was reduced to just a small trickle. It was determined that natural erosion was not a threat at the time, but the engineers did use the opportunity to install sensors to alert them to any future erosion issues. Interestingly 1969 produced the greatest tourism year ever at Niagara Falls because people were drawn to the region to view the strangely barren waterfall.
Tags: Niagara  Falls  Dewatered  erosion  control 
Added: 24th February 2016
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Posted By: Lava1964
Posted by: Bluey on 2016-02-26 
Meanwhile Horseshoe Falls eroded at record levels.
Posted by: Lava1964 on 2016-02-27 
Apparently erosion at Niagara Falls--not specifically Horseshoe Falls--is occurring at a slow pace. this is what I found on a website pertaining to that topic:

Accurate surveys of erosion of the Falls of Niagara began in 1842.

From 1842 to 1905, the average rate of erosion of the Horseshoe Falls was 1.16 meters (3.8 feet) per year.

From 1906 to 1927, this rate of erosion was reduced to .70 meters (2.3 feet) per year. This reduction coincided with the large quantity of water being diverted for hydro-electric generation.

Today, through increased water diversion and anti-erosion remedial steps, the rate of recession at the Horseshoe Falls has been reduced to a fraction of what it used to be. Today it is estimated that erosion of the Horseshoe Falls is less than one foot per year. In the future, through remedial efforts and further water diversion that the amount of erosion at the Horseshoe Falls has been projected to be reduced to approximately 1 foot every 10 years.
Posted by: Lava1964 on 2016-02-27 
Trying to prevent erosion is basically an impossible task as erosion will always occur. Erosion can certainly be slowed but it can never fully prevented. One of my high school geography teachers told my class that nature is always trying to flatten out protrusions via rain, wind, and running water. I always remembered that comment.
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