Did Someone Screw Up?

[Stump bumper]

I wouldn't think the deep water would hold enough oxygen to keep trout over the summer.

I have dropped a thermometer down 80feet in the summer when surface temps were low 90s and found 50 degree water and pulled up bass and walleyes on spoons at that depth and deeper. That lake is packed full of cold water springs and if the water below the darn can support trout all year it is coming from the bottom of the lake and averages around 50 degrees all year so I think if they had a chance the trout would find a way to make it.