Well, remember how slow construction goes during the winter. It looks like several months, but in reality there's only a few sporadic weeks to work with there. If they're going to knock all this down and build the entire ride plus whatever is going with it, it will probably take them longer than the off season to pull it off. I guess they may run it late into next year though - they could bulldoze everything during the off-season, build a bypass, then take as long as they need during the spring to finish the actual ride up. If they're planning on that though, I wonder why they started so soon...