The West Branch of the DuPage River bends slow through Warrenville, and the burr oaks standing over Warrenville Grove have been leaning toward that water a long time. C Walnut Tree Service works the yards off Batavia Road and the shaded lots above the riverbank, taking down trees that have outlived their footing and trimming the ones that still have good years ahead. Pruning here is a winter pleasure — bare wood, cold light, every cut easy to read. When a line of summer storms comes across the prairie and drops limbs over driveways and fencerows near the Prairie Path, the cleanup starts early and the wood goes out clean. What's left is a yard that looks cared for rather than worked on.