Route 117 runs through Bolton between stone walls somebody stacked by hand a very long time ago, and the lawns behind them lie wide and open to the sky. Ace Master Construction Corp mows that open ground, trims the wall lines where a machine can't sit, and clears the beds out each spring and again when the leaves finish falling. Winter turns the same properties into plow work — driveways pushed clear, walks shoveled, ice knocked down with salt before anyone tries the steps. A long rural drive opened at four in the morning is a small, complete piece of good news. Lawn care and snow removal in Bolton, Stow, Berlin and Lancaster.