The old rail bed through Livermore Falls has gone quiet and green, and the neighborhoods along it slope hard toward the Androscoggin. T & T Landscape and Masonry works those grades all year — mowing and trimming the pitched lawns in summer, raking and carting the leaf drop each fall, and plowing the same steep drives once winter takes them. On a hill the edges matter more: a clean line along a walk keeps a yard from looking like it is sliding downhill. Winter asks the same discipline, with snow carried all the way off instead of left as a slick shoulder. Steady footing in a town built on a river's drop.