We used to make trips to that facility in Williston, VT quite a bit in the late 90's and until about 2004, when we had at least one child racing on Rossi. I know that their US {actually North American} race room/warehouse was located there until Quicksilver bought the brand {along with Dynastar} and both were moved to Park City. I think that was about 2005-2006. I don't know what's become of the building. It was big.....for Vermont.
It also seemed to me like the manufacturing plant had been mothballed for a long time when we were visiting. I'm guessing mid-eighties may have been when that stopped. As I recall the industry took a bit of a downturn at that time, and some companies {Rossi being one} had manufactured so many skis that they had a lot of inventory that they were sitting on.
All sorts of work went on there, including design work. A lot of reps, including the US race guys, were "based" out of that location, etc. Seems like a LONG time ago. When Quicksilver made the move, it as very unpopular. I think their employment numbers were pretty low by then, but a lot of people lost their jobs. Maybe 50? In the late seventies and early eighties I recall a much bigger staff.
It sure cut down on shipping expense when you could pick what you wanted, and take it with you!