Snow falling on Market Square turns the brick soft and the waterfront silent, which is lovely for about an hour and after that it is simply snow. Walker Paving & Landscape handles the after: plow trucks working the streets off the harbor, driveways cut open, walkways scraped to a surface you can trust. Storms that ride up the coast throw wet, sticky snow at Newburyport, and it hardens fast once the temperature drops behind the front, so the trucks go early and then come back. By the time the shops on Inn Street switch their lights on, the parking is usable and the paths are clear. That is the whole job, and it is a good one.