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The three granite carrying steamers SIR DUDLEY de CHAIR, SIR ARTHUR DORMAN and DORLONCO at the Dorman Long workshops Milsons Point during construction of the Sydney Harbour Bridge.

In 1924 Dorman Long, builders of the Sydney Harbour Bridge placed an order for three steamers to transport the granite blocks from the Moruya quarry on the NSW South Coast.

Built at Walsh Island Dockyard, Newcastle the steamers transported the cut, dressed, shaped and sized granite blocks from Moruya to Sydney. Over 15,000 cubic metres of granite was shipped to Sydney and used in building the bridge pylons and piers. On the return trips the ships brought supplies, food and drinking water to the quarry.

Source: Sydney Harbour History