Client
Hunter Water Corporation
Location
Singleton, NSW
Contract Value
$31M
Duration
18 months
Completed
August 2023
Team Size
55 peak
Staged upgrade of an operating water treatment plant serving 85,000 customers, requiring construction to proceed while maintaining continuous treatment capacity.
Certifications
The Challenge
Upgrading a treatment plant that cannot be taken offline - 85,000 people depend on it for potable water supply. All construction had to be staged around operational requirements, with tie-ins requiring precise shutdown windows of less than 6 hours.
Our Solution
Le Gardenz engaged under an Early Contractor Involvement (ECI) arrangement, working with the design team 4 months before contract award to optimise staging. Tie-in windows were pre-planned with the operator, and Le Gardenz pre-fabricated all pipework and components off-site to minimise in-plant construction time.
Scope of Works
New sedimentation basin - 4 ML capacity
Filtration system upgrade - 12 filter cells
Chemical dosing system replacement
SCADA and instrumentation upgrade
Civil, structural, and architectural works
Commissioning and operator training
Outcomes
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Continuous water supply maintained throughout all 14 construction stages
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Project completed 4 weeks ahead of programme
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Final cost 1.2% under contract sum
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Zero notifiable incidents across 180,000 worked hours
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Achieved all 47 operational milestones without service interruption
