Midnight on the Waterbury Green, and the snow comes down through the lamplight in slow spirals — lovely to look at, unless you have to be somewhere at six. Luis & Son, LLC works those hours, plowing driveways and lots, shoveling the walks, and laying salt where ice wants to set up hard. The city's hills mean a plow route here is really a climb, and it gets done twice: once while it falls, once after it quits. Morning arrives and the pavement is dark and wet and passable, which is the whole art of it. Snow removal in Waterbury and the towns around it, whenever the sky decides.