Four in the morning in East Providence, and the plow lights are already swinging along Pawtucket Avenue while the rest of the hill sleeps under new snow. Trimlawn works the storm side of the year here — opening driveways and lots, cutting walkways down to the pavement, coming back once the wind has drifted them shut again. Snow that blows in off the Seekonk comes wet and heavy, the kind that hangs on the hedges in Rumford and packs hard at the foot of every Riverside driveway, and the reward of the job is the clean dark lane left behind, banks squared up, cold salt air breaking over it. The route runs through East Providence and the nearby East Bay towns. By the time the first commuters back out of their garages, it looks as though nothing ever fell — which is exactly the point.