Delivered between May 2007 and December 2008, Diona completed the demanding installation of the Gold Coast Desalination Pipeline. The main project deliverable was the construction of approximately 12.5 kilometres of 1050 millimetre mild steel cement lined pipeline. This was capable of holding 880 litres of water per linear metre and when completed, would provide the transfer of water from the Gold Coast Desalination Plant.
The Client for this project made some demanding requests which were not made clear at the stage of tender, including exceptionally high testing requirements. However, Diona was expected to deliver regardless. The management style and approach from the Client encouraged Diona to work smarter to meet with the administrative and site issues which were presented on a daily basis.
The major concern throughout Diona’s entire construction process was with the design provided by the Client. In many locations, the pipeline was unbuildable due to issues mainly caused by unidentified services. This resulted in Diona re-designing the pipeline on the move in order to keep production at a satisfactory level to the Client. The project demanded 100% time and effort from the onsite surveyor with the capability of altering the pipeline design as the problems arose in order to maintain momentum of the construction.
Diona did not get the opportunity to provide design solutions at the time of tender – solutions were only provided during construction. This required major administrative and innovative delivery upkeep on site.
A major design issue were the expected value pits associated with the pipeline. The size of these valve pits required construction within tight easements which were underestimated in the intended design. As well as this, these sites were already laden with existing services, which were essential to be maintained live and protected from large excavations for numerous weeks. Diona resolved these issues quickly and efficiently by providing the design and constructability concerns and solutions to the client in order to assist with the completion of the project.