Out on the Alfred Plourde Parkway the industrial lots are wide enough to lose a whole storm in, and shift change waits for nobody. Mattra Inc. plows those acres and the driveways around them — pushing lots open, clearing entries, shoveling walks, laying salt and sand at the doors. Big flat ground drifts fast in a Lewiston wind, so the plan is as much about where the snow goes as how it comes off. Stacked in the right corners, it stays out of everyone's way until April finally takes it. Trucks in, trucks out, and nobody late on account of the weather.