The Saco River loops through Brownfield in slow sandy bends, and the bog north of the village fills each spring with open water and herons. Bergquist Property Maintenance LLC works both ends of that year. Warm months mean mowing, trimming, edging and cleanups on the field lots and the river-road houses; cold months mean plowing, shoveling and sanding when a western Maine storm parks itself over the valley. Snow piles up heavy against the hills and the drifts fill the same corners every time — you learn a driveway's habits. An even lawn in August and an open drive in a February whiteout are the same satisfaction, twice a year.