North Hills rides the ridge the glaciers left behind, and the ground rolls there in long fairway curves that look gentle until you have to clear them at four in the morning. Fairway Landscape Group, Inc. takes that pitch on all winter: lots and long drives plowed, snow stacked where the meltwater won't run back over the pavement and set up, grades salted where the wind scours them. A January cold snap on the ridge is a different animal from one down by the water, drier, meaner, quicker to turn slush into glass. The job is finished when a car climbs the drive without anybody thinking about it. That is the whole measure.