The first real flakes usually show up in November, slanting across Highway 52 while the fields on either side are still stubble-brown. K&B Constructions Inc. is ready for them with snow plowing, driveway and walkway clearing, and lots pushed open around Fort Lupton so a business can unlock the door on time. Snow out here is unpredictable in amount and merciless in timing, which makes the job a matter of watching the sky and rolling when it says to. A lot cleared corner to corner, with the piles set where they block nobody, is a small piece of engineering. That is the standard the trucks go out to meet.