Below Quincy the river works through Lock and Dam 21 all year, barges moving in the dark, ice shelving along the banks in a hard January. Elite Outdoor Services LLC keeps a similar all-weather schedule on land, mowing and trimming through the warm months and plowing drives and walks once snow shuts the town in. A blade dropped at three in the morning is a strange kind of pleasure: nobody watches it happen, everybody notices that it worked. Come summer the plow gives way to the mower without a week missed in between. Quincy and the nearby towns are covered either way.