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Gertzel Engineering Surveyors

Waste Treatment Plant Koolong

Waste Treatment Plant Koolong

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Fulton Hogan were awarded the contract for the upgrade of the waste water treatment 
plant at Koorlong near Mildura by Lower Murray Water. The existing process at the WWTP comprises a chemically assisted sedimentation process 
(CAS) before irrigation of on-site tree lots with primary effluent. The existing plant has a 
design Average Dry Weather Flow (ADWF) capacity of 3.3 ML/day. The WWTP will treat 
after the upgrade an average dry weather flow of 11.85 ML/d. The peak wet weather flow 
for treatment is 400 L/s.

The upgrade includes:

  • Supply and install new D450 influent electromagnetic flow meter and associated pit.
  • Construct new inlet works including Receival chamber, automatic band screen, automatic 
screen bypass channel with coarse screen, screenings washpactor and vortex-style grit 
removal.
  • Construct 4 sequencing batch reactors (SBR) with integral flow splitter.
  • Supply and install end pivot type decanters for the SBRs.
  • Design and construct diffused air aeration system complete with blowers and necessary controls.
  • Construct new decant balance tank.
  • Design and construct a new channel style low pressure UV disinfection system.
  • Construct new magnesium hydroxide liquid (MHL) storage and dosing system.
  • Construct new phosphoric acid storage and dosing system.
  • Gertzel Engineering Surveyors are supplying all surveying services for the upgrade.

Robinvale Irrigation System

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The Robinvale Irrigation System commenced operation in 1947 to supply water 
pumped from the River Murray to the farming properties of the Robinvale 
Irrigation District.

Due to the age of the existing infrastructure and the changes that have occurred 
in the irrigation industry since the Robinvale Irrigation System’s inception, there has 
been a gradual deterioration in the condition and serviceability of the system. 
Consequently, Lower Murray Water (LMW) is implementing a replacement plan that 
comprises construction of a new pumping and piped distribution system that delivers 
water to the system’s irrigated properties at a much higher pressure than that provided 
by the existing infrastructure, enabling direct irrigation without the need for on-farm 
pumping.

The contract to construct the pumping station was awarded to Fulton Hogan and 
Gertzel Engineering Surveyors are providing surveying services for the project.

Koondrook flood enhancement works

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Construction of Koondrook – Perricoota flood enhancement works, being constructed by Fulton Hogan consists of the construction of 45Km of Levee and 3 major inlet structures.

The Project has been Designed to enhance the National Park forest conditions/sustainability and control water levels and flow from both the Murray river and surrounding feeder Creeks. Fulton Hogan have engaged Gertzel Survey to provide survey services to this $59 million dollar NSW State Water project.