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Supporting Unitywater’s long-term water security strategy across one of Queensland’s fastest-growing communities.

Unitywater

Sippy Downs, Queensland

Reservoir Earthworks + 2.6km Trunk Main

[Project Background]

Securing Water for a Growing Region

Unitywater’s Aura and Harmony program is designed to meet the demands of a rapidly expanding population, with Aura projected to reach 69,000 residents by 2056 and Harmony 20,000 residents by 2026.

As part of this essential infrastructure program, the Harmony Water Project included construction of a new reservoir at Tanawha and installation of 2.6 kilometres of trunk water pipeline connecting to Harmony in Palmview.

This critical infrastructure strengthens long-term water reliability, network resilience, and sustainable regional growth across the Sunshine Coast.

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[Scope Of Works]

Operating in Sensitive and Live environments

Construction of trunk water infrastructure supporting long-term supply and network expansion across the Sunshine Coast growth corridor.

Bulk earthworks for the new Harmony Reservoir infrastructure

Installation of 2.6km DN450–DN600 ductile iron and MSCL water pipelines

Construction of open trench pipeline connections to existing Unitywater assets

Testing, commissioning, and restoration to Council and Unitywater standards

Project Technical Snapshot

Core installation metrics defining the scale, depth, and capacity of the delivered infrastructure.

2.6km

Pipe Diameter

DN450-600

Installation Depth

4m - 6m

[Outcome / Key Features]

Delivered with Precision in Sensitive Environments

Outcome

Planning, resourcing and construction of reservoir earthworks
Open trench installation of 2.6km trunk water pipeline
Ductile Iron and Mild Steel Cement Lined pipe installation (DN450–DN600)
Engineered temporary works and trench shoring
Pressure testing and commissioning to Unitywater specifications

Key Features

Full reinstatement to Council and Unitywater standards
Driveways, footpaths, kerbs and asphalt restored
Turfing and hydroseeding completed
Quality Assurance delivered to Superintendent requirements
Active community management in a highly sensitive location

[Environmental Responsibility]

Environmental management was embedded throughout delivery.

Stringent sediment and erosion controls were implemented to protect nearby waterways and environmentally sensitive areas. Construction sequencing and restoration works were carried out to minimise environmental impact while ensuring long-term infrastructure performance.

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Partner With a Specialist in Critical
Water Infrastructure

If your project demands certainty, compliance, and disciplined delivery within live water networks, we’re ready to engage.

Aura & Harmony Water Trunk Infrastructure

Reservoir Earthworks + 2.6km Trunk Main

Securing Water for a Growing Region