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Originally Posted by fckm
they should be at the bottom, since the idea is to use falling water. If they're at the top, the water wouldn't be falling very fast.
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You would think so. But the falls move to quickly (something like 7 inches a year. which in geological terms. is pretty damn fast) and the bottom on the falls is far to rocky. (At least on the American side and the Canadian side makes to much money as a tourist site to spoil it with a building)
The current on top of the falls is actually pretty quick. Plus they channel the water into a narrow area. Giving it even more speed. It's a pretty nice set up.