JW that part of the river is very shallow, maybe only a foot of water is there, plus I did go out on the ice and it is very thick. I walk there every summer and know where the deep dangerous parts are, and would never let the puppies out if I did not think it was ok. My hubby would freak and he hates it when I take them to the river this time of the year. It was nice and warm and sunny and that area is frozen solid, all one foot of it, maybe two feet at the most. The river is so low this time of the year that when I hit a air pocket my foot falls threw the ice there to the frozen ground, no any water left there at that part of the river, The water that you see is the water on top of the ice that has melted cause the sun was hot.