My mother told me a story about back in the '40's when they had a farm in northeastern Ohio with a large creek running through the "back 40".

Beavers had dammed it up and the field was starting to flood. This was back when you could legally own dynamite w/o all the rigamarole, BTW. The dam was about 25 feet long and my grampa went back there and completely blew it up one morning.

Overnight, the beavers completely dammed up the creek again. My grampa and uncles had to go back, shoot the beavers and blow up the dam again. Last trouble they'd had with them, I'm told.

Off-topic: As soon as I read the title of this thread, I thought to myself, "This is the day Sipowitz gets himself banned" :-)