Mccallum Brothers retrofit DOP for near and offshore sand mining work
McCallum Brothers Ltd has retrofitted a DOP250 to an existing sand mining dredger in Auckland, New Zealand. The DOP will be used for nearshore mining of high quality sand for the construction industry and for offshore mining for beach replenishment.
The DOP is lowered on a wire to operate at depths from -15 metres to -20 metres. The mixture concentration is boosted using pressurised jet water on the drag head.
Along with the DOP, Damen has supplied McCallum Brothers with a total dredging package. The turnkey package includes a diesel-hydraulic power pack and jet water pack, which were mounted below deck, as well as dredging instrumentation for pump process monitoring, plus the necessary hydraulic hoses and discharge piping.