I took my boat to Sangchris Lake in Illinois two weeks ago and they had entire areas marked off with buoys stating "No boats."  It's a powerplant lake so I guess areas were restricted due to warm discharge into the lake making areas "too fishable" or, more accurately, "too catchable."  If that's the case, I understand and I'll have to live with it regardless, but can anyone tell me exactly why they've restricted the lake so much?

Waterfowl season.  (East Fork).

It has been awhile since I have Fished Sanchris. I know they do have alot of hunting lots out there though.