Benmore Power Station – Powerhouse Deconstruction & Asbestos Removal
Project Overview
Nikau was engaged to carry out the deconstruction of the powerhouse building at Benmore Power Station — a key component of one of New Zealand’s largest hydroelectric facilities, located in the South Island’s Waitaki Valley. This critical infrastructure project required a methodical and safety-focused approach, including the safe removal of asbestos-containing materials and the demolition of heavily reinforced concrete structures.
Working within a high-security, operational power generation environment, Nikau delivered a technically complex scope with a strong focus on worker safety, environmental protection, and material recovery.
Scope of Works
The project encompassed the following:
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Class A asbestos removal from internal linings, ducting, and plant areas within the powerhouse
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Full structural deconstruction of the disused powerhouse building, including roof, walls, and substructures
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Careful separation of utilities and live systems prior to demolition commencement
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Crushing and removal of concrete for off-site recycling and reuse in local civil works
This challenging project required stringent controls to manage dust, hazardous materials, and proximity to live electrical infrastructure. Nikau worked closely with the client and engineering consultants to ensure safety, compliance, and operational continuity.
Specialist Deconstruction Techniques
The Benmore Power Station deconstruction required a tailored approach using proven high-risk methodologies:
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Asbestos Removal under Controlled Conditions: All asbestos works were completed in full containment zones under Class A protocols, with air monitoring, negative pressure systems, and licensed supervisory staff onsite at all times.
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Mechanical Deconstruction Using High-Reach Equipment: Excavators fitted with concrete pulverisers and hydraulic shears enabled safe, sequenced demolition of large structural elements, including heavy beams and reinforced walls.
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Manual Soft Strip and Hazardous Material Isolation: Prior to heavy demolition, our teams carried out detailed internal strip-outs to remove asbestos materials, electrical components, and reusable equipment.
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Segregation and Crushing of Concrete: All concrete was processed for reuse, supporting sustainable infrastructure delivery and reducing the project’s environmental footprint.
Environmental and Safety Commitments
Working in a live power station environment required a comprehensive approach to health, safety, and environmental protection:
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Detailed Hazard and Risk Management Plans, including live asset interface protocols
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Permit to Work and confined space management in coordination with the station operator
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Dust and fibre control measures, including misting systems and protective barriers
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On-site crushing and transportation of concrete, minimising off-site disposal and reducing truck movements
Nikau’s safety-first approach ensured zero harm and full compliance throughout the duration of the project.
Sustainability in Action
A key achievement of the project was the complete recycling of all concrete materials. Processed concrete was reused for roading and hardstand construction, reducing the need for virgin aggregates and supporting local civil projects.
In addition, metal components, plant, and reusable materials were salvaged and repurposed where possible — demonstrating Nikau’s commitment to circular economy principles and responsible resource management.
Project Legacy
The successful completion of the Benmore Power Station powerhouse deconstruction reflects Nikau’s proven capability in hazardous material removal, complex industrial demolition, and sustainable waste recovery. Our work helped pave the way for future development at the site while preserving the operational integrity of one of New Zealand’s key power generation assets.
Talk to Us
Need a trusted partner for high-risk industrial deconstruction or asbestos removal? Nikau delivers safe, sustainable solutions across New Zealand’s most complex infrastructure projects.