Wow! That looks wild! I'm not sure I would have enjoyed the temps you mentioned. I much preferred the warmer air temps with cold water on your legs. And trying to walk through the water, you're apt to fall a few times and get your hands and head wet. I'd call in quits after about 5 minutes at those temps!!
Looks like y'all had a blast! Most of the water levels we hiked through were ankle to knee deep. There were a few places where the water got up to our waist. Even in July that water is cold! But we never had the water flowing like your picture above. That looks intense.