North of town, Lake Storey lies flat as poured glass on a July morning, and the mown grass along its edges smells like the whole prairie at once. Coulter's 360 Services LLC keeps that green going all over Galesburg: corner lots, deep back yards, the strip of turf that runs out to meet the alley. The list is short on purpose, mowing, string trimming, edging, and the cleanups that open and close the growing year. By suppertime a finished yard has its stripes laid true, its borders cut clean, and not a clipping left on the drive. On this flat grid of streets every line is visible from the sidewalk, which is exactly why the lines get made carefully.