Cheesman Park in winter is a wide white field with a marble pavilion at one end and the mountains laid out behind it like a paper cutout. Mile High Sprinkler and Landscaping works the streets around places like it after a storm, plowing, shoveling, clearing walks and drives, and breaking up the ice that forms where roof melt runs across a sidewalk. Denver sun does half the job by noon on the south-facing side; the north side is an entirely different negotiation. The aim is plain enough, that kids reach school on dry concrete and nobody's grandmother has to guess where the footing is. Cleared to the edges, before the day gets going.