A grading implement features a frame with at least one movable sectioncarried by a main frame section. Each movable section is movable relativetheretobetween a storage position and a working position reaching further laterallyoutwardfrom the main section to increase a working width of the implement. Anunderside ofeach movable section features a respective blade adjustably mounted theretoforselective adjustment between different relative blade positions relative tothe movablesection. One embodiment features outboard blades on two movable sections,inboard blades on another two movable sections, and a rear blade mountedcentrallyon the main section behind the inboard and outboard blades. A dust suppressionsystem features spray nozzles distributed across the main frame section behindtheblades, and storage tanks mounted atop the main section so that weight of thedustsuppression agent provides extra downforce to the blades.
