Mount Pleasant wakes slowly in June, the Chippewa River still holding its cool under the footbridges at Island Park while first light spreads across the level ground of Isabella County. Thielen Turf Irrigation Inc cuts lawns on that flat, generous mid-Michigan grid, where grass will take a straight line if you give it one. The work is mowing and trimming, edges run clean along walks and driveways, clippings cleared, a yard set back in order before the heat of the afternoon arrives. There is a real satisfaction in the last pass, when the stripes line up with the street and the whole lot reads as a single intention. Out past Deerfield and back through the neighborhoods off Broomfield Road, that is the standard the crew holds to.