Silver Street mornings in Waterville come with heavy dew and long maple shade, and that is the hour when a mower leaves its best lines. J. Alan Landscape works the lawn trade there — regular mowing, trimming close around trees and posts, beds edged into a clean shape, mulch topped up, and thorough cleanups in spring and fall. Stripes laid straight across a front yard, the border cut sharp where lawn meets walk: small things, but they are what a passerby actually sees. Yards are tended in Waterville, Winslow, Oakland and Vassalboro. The city's older streets were built for that kind of attention.