QGC Completes Australia’s Longest Underwater Pipe Pull

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In February 2013, QGC Pty Ltd, a BG Group Business, completed Australia’s longest underwater pipe pull. The project involved the simultaneous laying of two 39-inch diameter gas pipeline across Gladstone Harbor. The 1.4 mile long pipelines, installed for the Queensland Curtis LNG project and the Australian Pacific LNG project, were laid in the same trench by MCJV, a joint venture between McConnell Dowell Construction (Aust) Pty Ltd and Consolidated Contracting Company Australia Pty Ltd.
  The segments will connect each project’s main pipelines from the Surat Basin gas fields, about 186 miles inland, to LNG plants on Curtis Island. The pipelines were co-located and installed concurrently to minimize environmental impact and disruption to boating.
  The harbor crossing required construction of temporary facilities that included a 1.24-mile-long road, two bridges and a railway line to move the pipe across two creeks, marshes and mud flats.
  The contractor used a 450-ton winch that was temporarily located on Curtis Island to pull the pipes through the subsea trench. The trench was later filled with gravel and rock to protect the pipelines. (See related photo on cover).