When a South Jersey cold snap follows a wet afternoon, the pines out toward the barrens go glassy and the roads around Millville turn to a slick nobody sees coming. Cumberland Tree Service LLC runs snow work through those nights — plowing driveways and lots, clearing walkways down to hard surface, putting salt where the ice wants to hold. Storms here refuse to read their own forecast; rain, sleet and snow trade places by the hour, and the job is being ready for whichever one wins. There is a particular satisfaction in a lot that's black and dry at seven in the morning while the treeline is still white. Nobody notices the plowing. Everybody notices being able to get to work.