Again, there's been a fair amount of research in that area over the years. The specific lakes I referred to in the helicopter are part of the Imperial Kearl project, and I can't speak specifically to the nature of those lakes beyond what we talked about in the helicopter.
I do know that if you are providing compensation as part of the DFO approval, then that compensation has to support fish habitat. Making it shallow enough that it freezes to the bottom probably won't achieve that.
I'll let Mr. Duane speak further to that.