Barrow Island Reverse Osmosis

Ertech and Monodelphous for Chevron

Barrow Island, Western Australia, Australia

The Gorgon Project is the largest single-resource natural gas project in Australian history. Our team was engaged to develop a suitable potable and construction water supply for the project.

This resulted in design and coordination of two seawater reverse osmosis (SWRO) plants, which was carried out in two phases.

Phase 1 involved the construction and commissioning of a 1ML/d SWRO treatment plant used to supply water during enabling works and minor civil construction.

Phase 2 involved the construction and commissioning of a 2.4ML/d SWRO used to generate potable water supply for the accommodation village and to support more substantial construction.

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Providing solutions

As the project was located in a Cyclone D Region and state legislated Class ‘A’ nature reserve setting, a number of design solutions with regards to the following key aspects:

  • PLC and electrical systems
  • Pipework and pump systems, earthworks, stormwater drainage and footings
  • Extensive ballasted undersea piping and electrical umbilical cabling (4.5km and 4km respectively)
  • Two reservoirs to mitigate tidal changes and ensure constant water supply
  • Offshore outfall system to discharge brine via suitable pipework and correct outlet configuration
  • The project was completed on schedule and budget, with an exemplary safety record.

The project was completed on schedule and budget, with an exemplary safety record.