Gore actually does have a water problem. Since they added so many low E guns, air is no longer the limiting factor like it was back in 1995 when they added the Hudson River feed. I believe back then, they felt they had enough water for the size of the mountain, and they rarely ran at maximum water capacity anyways since they were always limited on air.
Gore has two snowmaking systems. The Hudson River system can pump 4800 gpm, and the water can either be used directly on the mountain at the ski bowl, portions of Burnt Ridge, and even up to the main base, or it can be used to fill the reservoir. The reservoir system operates at 6800 gpm, and supplies water to the rest of the mountain. Prior to 2018, the reservoir system also operated at 4800 gpm. They have no booster stations.
There's a 2000 gpm deficit, so if they're constantly refilling the reservoir, then they've got about 10 days of snowmaking before they run it dry and need to stop and refill it.
It's possible that they can squeeze a bit more out of the existing system by using both systems to put water directly on the mountain during shorter windows. If they're going to have to shut down after 3 days because it's too warm, then they might as well drain the reservoir and refill it during the warm up.
If they want to upgrade (which they need to do), then they'd need to look into increasing their permit for water withdrawal. If they upgrade the reservoir system again, then they will just drain the reservoir faster and need to shut down sooner.