Project Start Date

April 2016

Project Completion Date

August 2016


Hunter Water Corporation

Comdain's Role

Principal Contractor


New South Wales


Electrical, Mechanical & Instrumentation

Treatment Infrastructure

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Design & construction of new infrastructure to address water quality non-compliances and safety, environmental and operational risks at Nelson Bay WTP.

Works Undertaken

  • Bushfire protection works including the replacement and safe disposal of existing roof structure and asbestos ceiling and other building modifications (doors and vents);
  • Installation of new caustic bulk storage tank and construction of caustic storage bund and dosing facility;
  • Establishment of a dedicated delivery bund and associated spill collection infrastructure for liquid caustic;
  • Relocation of the existing process water pumps and associated pipework;
  • Replacement and relocation of new telemetry pole along with transfer and installation of telemetry infrastructure;
  • Modifications to dosing system and Installation of a new dosing flow meter;
  • Installation of new caustic and fluoride dosing points and double containment piping.

Highlights & Innovations

  • The project was successfully completed despite a limited 12 week shutdown period. All works , plus additional scopes were completed as per original program.
  • Seamless integration of double containment pipe from chemical room, across piping rack and into a underground dosing pit.