On a summer evening the riverfront fills with people watching barges push upstream, and every lawn between the levee and the hill is putting on an inch a week. Loyalty First Services LLC keeps up with all of it — mowing on schedule, trimming what the deck cannot reach, edging so the yard has a border again. Midwestern humidity is generous to grass and to weeds alike, which makes consistency the entire craft here. In fall the same yards need their leaves moved off and a final cut before the ground goes cold. Lawn care for Alton homes and the streets that run down to the water.