Robin linked to the wiki article on the Rance tidal plant. That's just
across the water from here and I've driven over the barrage numerous times.
I suppose the novel feature of the new plant is that the turbines are "free
standing" and operate off tidal current, whereas the Rance has a dam that
fills up then is emptied out when required for power. Building dams is
expensive.
Nick Palmer
On the side of the Planet - and the people - because they're worth it
Blogspot - Sustainability and stuff according to Nick Palmer
http://nickpalmer.blogspot.com