We get aircraft overflying our plant EVERYDAY at all kinds of different altitudes and directions, but usually they look like ants in the sky, so they're probably up there pretty good. On a clear night, you can stand on the roof of the Turbine building and watch Airline traffic coming and going across the lake as they come into and out of ORD and MDW. Conditions have to be just right though, it's a BIG lake.
We also sometimes get small aircraft flying only a few hundred feet away and probably about 50' - 100' above the lake. That's usually only in the summer for some reason though. I don't know if anything ever happens to the pilots, but I don't think so because they keep coming back all summer.
We put bouys out so the fishermen and sport boaters know not to come any closer, but to my knowledge there's no mini-TFR over or around us.