World's Quietest Truck

Mt Arthur Coal mine is a large open-cut mine in the Hunter Valley, New South Wales, Australia.

To meet the most stringent noise limits for mining operations, GHD was commissioned by WesTrac (Caterpillar dealers for NSW/ACT and WA) to acoustically attenuate three Caterpillar 789C off-highway trucks.

On assessment of noise sources emitted by the engine, fan, transmission and differential of the truck, GHD engineered a unique solution involving advanced acoustic modelling and materials research.

The treatment resulted in an overall static sound power level of 106dB(A) and a dynamic sound power level of 110dB(A) making the trucks the quietest Caterpillar 789C trucks in the world. These significant results are equivalent to 20 modified trucks running at full power, with the sound impact of just one untreated truck.

GHD also designed a cooling system into the attenuation package to maintain Caterpillar’s optimum operating temperatures, even during the adverse conditions experienced in the harsh environment of earth moving.

Comprehensive reassessments of the truck reported that acoustic performance had not deteriorated.

Air & Noise

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Our proven innovative approach, track record, and commitment to delivery help to deliver successful client outcomes.

GHD capabilities cover:

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EIA & Approvals

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GHD is recognised for providing holistic and integrated solutions in managing and preparing project impact assessment and approvals. Our environmental and community planning specialists, engineers and scientists work to better understand complex issues associated with our clients new developments  from concept phase through to decommissioning. This approach delivers better environmental and social outcomes, and reduced approvals timeframes and compliance costs.

GHD focuses on the identification of potential environmental constraints and opportunities in the early stages of a project. This allows environmental and social factors to be reflected in the development of the project and mitigation measures to be devised to minimise potential impacts. In doing so, community acceptance is maximised and delays in implementation are significantly reduced.

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Mining & Metals

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From mine concept to closure, GHD considers geological, mine planning, materials handling, metallurgical, tailings, environmental management, operational and financial objectives to create optimal solutions for the many conflicting objectives in mine design and development.

With vast experience working with communities in rural, remote and urban locations, and the ability to assist both local and international clients, GHD provides sustainable management strategies to protect and enhance Indigenous cultural heritage, reduce environmental impact, maximise efficiency and enhance continuous improvement.

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Mining Engineering

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We understand both the business and technical issues involved in delivering optimum project outcomes for your mining business. The mining industry is a continually changing competitive environment and together we can develop flexible and innovative solutions.

GHD has a broad range of technically oriented specialists to support every stage of your mining and quarrying life cycle. We have the capability and commitment to assist you to successfully and profitably develop your mining prospect, operation or expansion plans.

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