Before the first door opens along Beaver Creek Boulevard, somebody has already walked every entry with a shovel. Valley Building Services LLC. handles snow removal around Avon — plowing lots, clearing sidewalks, steps and doorways, and treating the ice that forms where the sun clips a building for an hour and then moves on. Freeze-thaw is the real adversary at this elevation; a wet noon and a hard night can turn a bare walk into glass by seven the next morning. So the route gets run, checked, and run again, and the measure of a good night is that nobody slips and nobody notices. Dawn coming up the valley with the walks already clear is a fine way to start a day.