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Supplying clean water to the Coffs Harbour region

Coffs Harbour Water Filtration Plan


Coffs Harbour City Council


Karangi, NSW

About The Project

The Coffs Harbour water supply originally consisted of a reservoir pump station with some lime addition. Chlorine was added further downstream and at key points in the distribution network.

As a regional growth centre, Coffs Harbour needed a new, much larger water filtration plant to meet the demands of a rapidly expanding population. Coffs Habour City Council secured land to build a new $60 million plant near the old one.

CNF played a major role in the alliance that was formed to build the new plant. CNF’s multi-discipline team was responsible for:

  • The electrical and instrumentation design and installation of the new plant.
  • The design co-ordination for all engineering disciplines.
  • Construction support.
  • Taking on much of the mechanical contractor’s role when it became evident that they could not keep up with the pace of design and construction.
  • The project engineering, final design and expediting the 10 chemical storage and distribution systems including chlorine gas, caustic, CO2, alum, PAC, hydrofluorosilicic acid, lime, permanganate, coagulant and filter aid polymer.

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Major Achievements

  • Project was completed within budget and within the required timeframe.
  • The plant worked well from the first day of operation processing up to 24 million litres per day.
  • Coffs Harbour Council and the operators were extremely happy with the completed plant.
  • Water quality in the region improved so much that the chlorine dosing within the distribution network could be turned off.

Project Innovations

  • The CNF team engineered and built all the non-proprietary chemical dosing panels, in conjunction with the operators, to ensure they were fit-for-purpose and would meet all the requirements.

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