A commercial lot in a storm is a problem of geometry — where the snow goes, how the melt runs, which corner turns to ice by three the following afternoon. Hall Landscape Contractors solves it again and again across Castle Rock, out toward the Douglas County Fairgrounds and back through town, plowing lots and drives, clearing walks and entries, stacking piles where they will not refreeze across a lane. The work starts when the flakes do and ends when the pavement is clear again. Nobody photographs a plowed parking lot, and that is fine. It is enough that the gate opens and everybody gets in.