Oh man! That's sad news. I myself glissaded down Aasgard Pass a month ago (in super high speed) from today and heard in one spot running water which I purposely avoided because of fear of falling through a snow hole. I'm guessing it was on the upper part near Aasgard Pass. As for the Mount Baker incident, I think I may know what moat that is. I glissaded right past it, and a friend of mine didn't see it in time and was going so fast that he flew right over it. When we stopped to take a glance we could see that it was very wet and deep. (It's near the main foot path near the bottom). I personally am someone who loves glissading and do it all the time, although I do keep a look out for this kind of stuff, I'll have to be extra careful out there.