Although one question that was raised about how the structure could survive, if it was there to begin with, is if it was frozen in an avalanche. The possibility in that region is supposed to be fairly high for that sort of activity, avalanche/earthquake stuff.
Again, that came from the special, so I'd take it with a grain or two of salt.
I would think that the higher up, the less the avalanche activity just because it would be colder. I'm thinking that the seasonal margins would see the most activity.