Meanwhile, in other fish news, a recent headline in the Vancouver Province says that dams make salmon prone to heart attacks. -- I suspect being shot out of a cannon might also lead to heart attacks.
It's like the prairie dog vacuum!
While I think that hydroelectric dams are a good source of energy, they're so very disruptive. It seems like a bad idea to mess with sources of fresh water as it's becoming more and more apparent that water scarcity will be a problem in the coming decades.