The last time I fished ice at Frontenac it was quite cold and had been for several days. We popped some holes and settled back to jig and my buddy kept saying he could hear water running. I looked at shore and noticed the rock pile that extended straight out to just about where we were sitting [wing dam] and started to snoop around a bit. Just five feet from where said buddy had his butt planted on a bucket we found open water under some shale ice that had heavy frost on it so the moving water was not visible but could be heard. We packed it up an went elsewhere to fish.
A couple days later there was a fiasco with several trucks thru the ice right where we were sitting.
So here’is something to think about if you’re going to fish Frontenac. Like during hot weather, during severe cold the nuke plant has more demand for electricity. That means more warm water than when its warmer out. The nuke plant cannot by law release water above a certain temperature threshold, but the plant can release MORE water that is warm. Its this increase in flow that hits that wingdam and is lifted up as it flows over it and that extra, warm water erodes the ice from the bottom up. Since the wingdam there is made of rock it is uneven and the water flowing over it is not uniform in how this erosion takes place: some areas can be thick ice yet while others only a foot or even inches away can be almost open water and that thin spot can be large….like in the size of a car.
Of all the places there are to catch fish thru the ice on the river, Frontenac is the last place my butt would be found.