By two o'clock on an August afternoon the clouds pile up over Chimney Gulch and Golden gets twenty minutes of rain that smells like wet dust and warm pine. J Hansen Lawn Service works the hours on either side of it — mowing early, trimming and edging while the blades are dry, and cleaning a yard out when the season turns. That short storm is half of what keeps a lawn here alive; the other half is a steady cut and attention paid to the thin spots. Coming back to the same yard week after week is how you learn what it is asking for. Golden, Applewood, Wheat Ridge and Lakewood.