Abstract: The ‘Dumpster Cover Assembly’ is an attachable ‘hook-on’ tarp and bow cargo cover; to enclose the open tops of roll off dumpsters used for refuse disposal typically in construction, demolition, renovation, or environmental remediation projects. The ‘Dumpster Cover Assembly’ is the only universal tarp and bow system that can be installed without welding, drilling or modifying the roll off dumpster in any way. Bows are suspended across the dumpster body and attached to brackets that ‘hook-on’ invertedly to the outer top dumpster rails and hang on the inside of the dumpster body; and a tarp or canvas cover is suspended over top of the bows and partially down the sides of the dumpster where it is secured with cord, bungy straps, or lockable steel cable. The cover assembly is portable, interchangable, quickly installed, detachable, and can be used as a temporary or permanent enclosure.