Along the Powers corridor the business parks empty out at six and the lots go quiet — which is exactly when winter work begins. TJP Enterprises Inc. plows those wide acres in the dark, laying long passes end to end, stacking snow at the far corners where it will not eat parking spaces or block a turn. Sidewalks, loading zones and the walkways between buildings are cleared by hand and spread against ice. Colorado Springs storms often arrive on the tail of a cold front and quit before dawn, which leaves one narrow shift to get it all done. At opening time the asphalt is dark and dry and the day starts on schedule.