Dusk along the Pachaug River near Hopeville turns the snowbanks blue, and that is often the hour the plowing starts. Dantry & Associates Landscaping runs the winter side of a landscape trade in Griswold, which means the properties it knows in leaf are the ones it opens in drift. There is a rhythm to the work — push, back-drag, square off the turnaround so nobody has to guess where the lawn begins. Ice gets treated where the shade holds it: the north side of the garage, the bottom of the grade, the shallow dip by the mailbox. By full dark the driveways read as clean rectangles under the porch lights, and that is the whole point.