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PAST PROJECTS

Vacuum Sewage at Coomera Marine Precinct

Client: Vacuum Sewer Services

Queensland’s Gold Coast is recognised Australia wide for its tourism. It is also the home of a specialist marine precinct that manufactures, repairs and sells pleasure craft, fishing boats and other marine craft. This specialist marine precinct is located on reclaimed land adjacent to the northern bank of the Coomera River, north of Southport.

The large area of flat land meant that a conventional gravity system would have been very expensive to construct. It would require deep excavations into the underlying subsoils and several pumping stations to collect the sewerage from the precinct.

The solution was a vacuum sewer collection system. A vacuum design allows for mains to be constructed at minimum depths thus avoiding deep excavations. A single vacuum collection and pumping station was sufficient to collect sewerage from the entire precinct. The vacuum station designed includes an in-ground collection tank with above-ground vacuum and discharge pumps, electrical switchboards and control gear. The Coomera marine precinct vacuum station has been discretely placed into the development and occupies a relatively small footprint.

The main advantage of using a vacuum collection system over gravity systems in large flat areas is that of cost-saving. The vacuum system also offers flexibility in mains location and depths which cannot be matched by a rigid gravity system.

GeoLINK’s involvement in this project was as the design engineers for Vacuum Sewer Services Pty Ltd, the constructing authority. GeoLINK is one of few engineering practices qualified to prepare vacuum sewer designs. Our involvement includes all design aspects of the system including the indivisual vacuum delivery mains, the vacuum collection sumps, vacuum pumpstation and outgoing rising mains.