A clipper comes down out of the northwest and by three in the morning Commerce Charter Township is a different place — Benstein Road under six inches, the streetlights hazed, everything hushed. That is Denno's Land Solutions' hour. Plowing, clearing driveways and lots, shoveling walks down to the pavement, spreading salt before the freeze sets a glaze on it. The measure of the night is a homeowner at six-thirty backing out without a thought, coffee still hot in the cup holder. Snow work is invisible when it goes well, and going well is the whole point.