The main transmission pipeline is being constructed to enable CSG to be transported from the gas fields in the Surat and Bowen basins to the LNG plant on Curtis Island located off the coast of Gladstone for processing and export.

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The welded pipe segments are lowered into the prepared trench by specially designed side booms. Up to six side booms operate together lifting 180 m of welded pipe at a time and lowering into the trench for final tie-in, testing and commissioning.