You may see fast flowing streams in the summer and wonder how they can become ice covered during the cold season. The formation of ice shells is a very slow process, but it creates some physical miracles. This is one of the many freeze-up processes that can be observed along McIntyre Creek during the first half of winter.
These two giant culverts (and the smaller one on the left) evacuate surface water of the East Blackstone River across the Dempster highway corridor. They have a large capacity to safely handle very high flows.