On Wed, 12 Sep 2007 11:11:25 -0400, with neither quill nor qualm, "Ed
Huntress" quickly quoth:

Unless you're talking about wave generation, my impression of tidal is that
it's hellishly intrusive on the coastal environment. You have to dam
something up to make it work.

Am I wrong about this?

http://en.wikipedia.org/wiki/Tidal_power See the section on "tidal
stream power".

--
If you turn the United States on its side,
everything loose will fall to California.
--Frank Lloyd Wright