Denver's biggest snows come from the wrong direction: the wind swings around, shoves wet air back against the mountains, and the sky over the east side of town goes the color of concrete. Horizon Property Services works that edge, out past Havana Street where the grid loosens into open ground and nothing stands between a property and the storm. Lots and drives get plowed, walks and entries get shoveled, and the ice gets treated before the overnight refreeze turns yesterday's melt into tomorrow's problem. Clearing snow on the open east side means going back, because the wind does not consider the job finished when you do. Sunrise on a scraped, dry lot out there is a fine thing to look at.