When a nor'easter stalls over Rhode Island, the wind runs up the South Branch of the Pawtuxet and loads the trees along Coventry's eastern edge until they bow. Warwick Tree Service Inc is out in the middle of it, plowing driveways and lots, clearing walks, breaking open the drifts the wind piles against a garage overnight. Storm work has a tempo all its own — an early pass to stay ahead of the accumulation, another once it finally lets go, salt laid where meltwater will run and set. There is a quiet reward in an open driveway found by a household that never had to worry about it. The river keeps moving under the ice, and so does the town.