Nah, there's only one person who pushes that theory and he is known to use sockpuppets.

There are pictures at http://themindcircle.com/niagara-falls-runs-dry/ but this is the better article.

From your article "However, it may not be the last time we ever see Niagara Falls dewatered – two bridges present above the falls require replacement sin the near future, in which case it might be time to drain the water once more."

That would be very neat to see in person.