Pretty much everything; it's probably not 100%, but it's a pretty high rate.
They were very concerned, because they had to take the electric barrier down to do this maintenance work. I think it was a 24- to 48-hour period. They gave a really intense dose of rotenone. If I'm remembering correctly, it was a three- or four-mile stretch of the river, or perhaps a two- or three-mile stretch, something like that, so it was pretty substantial. It's fairly wide, and relatively deep as well.