Cutter Suction Dredger 500 “Pilbara Sawfish” The Pilbara Sawfish is a modular CSD500 dredge which will carry out capital dredging works on the Onslow project in Western Australia. The suction dredger has been built at the Damen yard in China. The delivery has been completed with a spud carriage pontoon to enlarge the swing width, as well as a number of dredging pumps which have been made into boosters locally. See all deliveries