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Closure & Rehabilitation

ATC Williams provides lifecycle closure, rehabilitation and advisory services for tailings, water and mine waste storage facilities, and landfill facilities.

We deliver mine waste storage facilities that are safe, non-polluting, and aligned with post-mining land use.

Please explore our projects to see our capabilities in action

— Our Expertise

Our expertise in mine waste storage facilities, rehabilitation and water management complements our clients’ facility closure compliance and social responsibility objectives.

With an extensive knowledge of tailings and mine waste, surface and groundwater management practices, and governance challenges, we are positioned to support our clients in transitioning from operations to closure.

Our Integrated Facility Closure considers:

  • Entire Life of Asset
  • Cost-Effective Lifecycle Solutions
  • Sustainable Outcomes

— INTEGRATED LIFECYCLE CAPABILITIES

Integrated Closure Solutions for Tailings, Water and Mine Waste Storage Facilities.

  • Facility Closure is an integral part of our tailings management, water management and mine waste management services, whereby end-of-life decommissioning, closure are rehabilitation are part of the overall design project.
  • Our ground engineering and material characterisation expertise contributes to the creation of practical solutions that maximise the use of local construction material resources and optimise integration into any related site activity to reduce closure liabilities through the lifecycle.

— Mine Closure Lifecycle Solutions

STRATEGY SELECTION

  • Options definition and appraisal
  • Governance and Risk Management, identification and assessment of risks from landforms with problematic waste
  • Closure plan development aligned with global governance practices and local legislative requirements

TECHNICAL ASSESSMENTS

  • Site characterisation, geotechnical and geochemical characterisation of tailings, waste rock and rehabilitation materials
  • Optimised options based on numerical modelling of slope stability, erosion, water and contaminant flux through containment structures

DETAILED LANDFORM GEOMATIC DESIGN

  • Cover and containment systems
  • Geomorphic landform design
  • Erosion and landform evolution modelling
  • Constructability assessment and solutions for soft tailings
  • Hydrology and Hydrogeology

CLOSURE IMPLEMENTATION

  • Detailed construction specification
  • Quality control and quality assurance management
  • Landform performance monitoring

ADVISORY SERVICES

  • Independent Technical Review
  • Regulatory Compliance
  • Governance & Assurance
  • Management Frameworks

— Partnership Focused

Our multi-disciplined, integrated approach produces safe, stable, non-polluting landforms. Stakeholder collaboration, governance and sustainable management of the environment guide our solutions.

We partner with our clients to understand specific needs for facility closure and to achieve effective outcomes, drawing on the range of technical skills and experience available to the business.

— MORE INFORMATION

 Please explore our Closure and Rehabilitation Capability Page to learn more.

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— Let's Talk

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Technical Community Team:

— Projects

Discover our extensive facility closure solutions for mining, resources and government projects around the world.

Ravensworth Operations

CLIENT
Glencore
LOCATION
Ravensworth, NSW
Glencore engaged ATC Williams to deliver the geotechnical investigation, detailed design and construction support for closure of the Dam 7 South Tailings Storage Facility (TSF) at Ravensworth Operations in the Hunter Valley, New South Wales. The project required an engineered capping platform over an extremely low-strength in-pit coal tailings deposit, enabling future overburden emplacement under the site’s closure strategy.
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Closure and Rehabilitation, Tailings Management
Australia/New Zealand

Mount Thorley Warkworth

CLIENT
Yancoal
LOCATION
Hunter Valley, NSW
ATC Williams has supported TD2 throughout almost its entire operational life, first becoming involved at Mount Thorley Warkworth in 1999. Each investigation and design builds on previous monitoring, geotechnical assessments and operational experience, so strategies can be refined as tailings conditions evolve.
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Closure and Rehabilitation, Dams Engineering, Geotechnical Investigation, Tailings Management
Australia/New Zealand

AGL Macquarie Bayswater Power Station

CLIENT
AGL Macquarie
LOCATION
NSW
ATC Williams (ATCW) has supported ash management and rehabilitation planning at Bayswater Power Station since 2020, delivering ash reconciliation, storage capacity assessments, geotechnical investigations, landform design and long-term rehabilitation strategies. As part of the planned closure of the power station in 2033, AGL Macquarie engaged ATCW to develop a practical, cost-effective strategy for rehabilitating Ravensworth Void 4 and Void 5.
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Closure and Rehabilitation, Geotechnical Investigation, Materials Characterisation, Tailings Management
Australia/New Zealand

Mangoola Coal Operations

CLIENT
Mangoola Coal Operations Pty Ltd
LOCATION
Wybong, NSW
Mangoola Coal Operations, located in the Hunter Valley, is a major open-cut mining operation committed to responsible resource management and progressive rehabilitation. As part of its closure planning, the site required a comprehensive capping solution for two decommissioned tailings dams: TD1, with a capacity of 3,400 ML, and TD2, with a capacity of 3,900 ML. The Stage 2 capping works covered an area of approximately 222,000 m2.
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Closure and Rehabilitation, Construction Support and Management, Dams Engineering, Geotechnical Investigation, Materials Characterisation, Tailings Management, Water Resources
Australia/New Zealand
ALL PROJECTS

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