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Message: <blockquote data-quote="sandun_kg" data-source="post: 7143286" data-attributes="member: 17496"> When Niagra falls were stopped! <img src="http://i1018.photobucket.com/albums/af309/preeto_f055/500x_dryniagra3.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> In 1969, the Army Corps of Engineers accomplished an awesome feat: They turned off Niagara Falls. They did it to clean up the area, and check for structural integrity. Here are pictures of this bizarre episode in structural engineering history. <img src="http://i1018.photobucket.com/albums/af309/preeto_f055/500x_dryniagra4.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> These pictures were taken by tourists who visited the dry falls in 1969. <img src="http://i1018.photobucket.com/albums/af309/preeto_f055/500x_dryniagra2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> For six months in the winter and fall of 1969, Niagara's American Falls were "de-watered", as the Army Corps of Engineers conducted a geological survey of the falls' rock face, concerned that it was becoming destabilized by erosion. During the interim study period, the dried riverbed and shale was drip-irrigated, like some mineral garden in a tender establishment period, by long pipes stretched across the gap, to maintain a sufficient and stabilizing level of moisture. For a portion of that period, while workers cleaned the former river-bottom of unwanted mosses and drilled test-cores in search of instabilities, a temporary walkway was installed a mere twenty feet from the edge of the dry falls, and tourists were able to explore this otherwise inaccessible and hostile landscape. <img src="http://i1018.photobucket.com/albums/af309/preeto_f055/500x_dryniagra.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://i1018.photobucket.com/albums/af309/preeto_f055/500x_niagrafallswithwater.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Give a REP++ if you like the post....<img src="/styles/default/xenforo/smilies/default/happy.gif"  class="smilie" loading="lazy" alt=":)" title="Happy    :)" data-shortname=":)" /><img src="/styles/default/xenforo/smilies/default/happy.gif"  class="smilie" loading="lazy" alt=":)" title="Happy    :)" data-shortname=":)" /> </blockquote>

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