Project

K129 Gathering Pipelines

222km

Pipelines

$102m

Project Value

Zero

LTI’s

DN630

Pipe Diamater

Mitchell met all the requird criteria on this milestone project, significantly through the use of our innovative systems. Mitchell specifically developed over trench welding barges for this project that allowed the direct installation of the pipe and tees. All were butt welded on the weld barge and laid direct to the trench, removing the need to use large electrofusion couplings, improving safety, quality and productivity.

Project Details

222km PE100 up to DN630
Nil use of Electrofusion Couplings >DN250
Single High Pressure Butt Fusion Fast Cool Welding
100% Time of Flight Diffraction NDT testing
100% Pneumatic strength and leak testing
100% GPS weld location and traceability
100% traceability of all materials
100% Welding qualification
Native soil screened for bed and pad
Marker tape and added tracer wire above the pipe
Pull through cleaning of each pipe at welding
Pneumatic flushing for pipe cleanliness verification
Machine control graded trenching including engineering survey and design by Mitchell
Full installation of facilities and tie-ins

LOCATION

Roma, Queensland

PROJECT VALUE

102m

YEAR

2014

CLIENT

Santos Ltd

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The Carmichael coal mine is located in the north Galilee Basin, Queensland, approximately 280km south of Townsville and 300km west of Mackay. The work scope included the construction of a water pipeline and procurement of associated pumping equipment & water storages.

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The Narrabri project, although short in length and duration was very challenging due to the alignment of the pipeline being the middle of the Pilliga State Forrest, within an existing HDPE Water line corridor, with no new clearing allowed. The pipeline was subject to strict EIS conditions including minimising dust and erosion onsite. To manage the conditions an extensive erosion sediment control plan (ESCP) was designed and implemented.