An ice storm on College Hill is its own event: Benefit Street's slate sidewalks glaze over and the brick side streets become something you take on foot, carefully, or not at all. D.C Campbell Hardscape & Landscape works those grades in winter — plowing the short steep drives, shoveling stairs and walkways down to the surface, spreading de-icer where the pitch does the rest. Hill work rewards patience and a good sense of where meltwater will run at four in the morning. The reward is a cleared flight of granite steps at first light, dark and dry against all that white. Then on to the next one, before the sun tips over the river.