After a summer downpour, Cohoes drains the way it was built to — water off the roofs, down the hill streets, out toward the locks and the river below. An hour later the sun is back and the lawns are the greenest thing in the county. Rainbow Sprinklers & Drainage keeps them looking that way, mowing on schedule, trimming close along beds and walls, and clearing yards out in spring and fall. Grass in this valley grows fast when weather feeds it like that, and staying ahead of it takes showing up. A yard that looks effortless is usually somebody's Tuesday.