If they let at least the bottom of it bump up it would slow people down for sure, but yeah, that could be a trouble spot.
The worst pipe crew in the world should be able to do 100' a day. trench, lay pipe and backfill. This is actually a pretty easy pipe job. there shouldnt be any utilities to deal with, they dont have to saw cut any blacktop, backfill with stone, (at least i never see stone when they are digging up pipes to fix) or haul anything away, so really, its pretty easy work. Its about 2500', so honestly, i dont see why they cant get it done before the season, but this is Blue Mt.
Didnt they get a whole bunch of new snow guns last year? i would assume they still have some old shit lying around if they just wanted to use air/water guns.