The Pemigewasset runs cold along the western edge of New Hampton, green in July and steaming on the mornings when the air turns colder than the water. Dumont Property Maintenance works both ends of that thermometer: mowing, string trimming and cleanups while the grass is growing, plowing and shoveling once it quits. Riverside ground and hill ground behave differently — one holds moisture, the other holds wind — and a lawn cut with that in mind simply looks better in August. In winter the same attention goes into the route, driveways opened wide and walkways cut clean through to the door. One property, two seasons, and nothing on it that has to be learned twice.