Chris Cooper, Principal Consultant – Mine Closure and Transition

The release of the draft Macquarie Coal Complex and Mt Arthur Coal Mine Transformation Precinct Master Plans and state-led rezoning proposals are a significant milestone for the Hunter.

“The release of these draft master plans is a major step forward because it begins to turn post-mining land use from policy ambition into an investable planning pathway. The key challenge now is ensuring the mining lease relinquishment and residual risk frameworks evolve alongside the planning system. Without that parallel reform, rezoning alone will not unlock the full jobs, investment and regional transition potential of these sites.”

There are examples of miner-led post mining development proposals, including the Yancoal led Stratford Pumped Hydro and Solar project on the closed Stratford Coal Mine in Gloucester valley. This is another exciting milestone, approved in the same week as the release of the draft pilot master plans. However, these plans represent broader strategic planning for the Hunter’s mined lands transitioning to a decarbonised economy move beyond broad policy discussion and into a publicly exhibited planning framework that starts to show investors, local government and industry what a real transition pathway could look like. That matters, not just because of the scale of the opportunity these pilot sites present, but because it begins to shift post-mining land use from aspiration to implementable planning.

These plans are ambitious for good reason. They position Macquarie Coal and Mt Arthur as future employment precincts that can leverage scale, existing infrastructure, strong regional freight connections and proximity to skilled workforces to support new industry, logistics, advanced manufacturing, renewable energy and other employment-generating uses.

Just as importantly, this is driven through state-led rezoning processes and draft master plans that start to provide the sort of spatial and policy certainty investors have been waiting for. That signalling really matters. Former mine land is rarely constrained by a lack of ideas. More often, it is constrained by uncertainty, uncertainty about zoning, about what development pathway applies, about whether future uses are genuinely contemplated by government, and about whether technical site constraints will be managed in a way that makes investment realistic rather than speculative.

A master planned, state-led rezoning pathway begins to reduce that uncertainty. It tells the market that this is not just land awaiting closure; it is land being actively positioned for a next use. It is a signal to the market that the Hunter is serious about land transition, and that government is prepared to use planning tools to bring structure, sequencing and visibility to the process.

In practice, that means better signalling of where early activation may be possible, how development can be staged, what further investigations may be needed, and how post-mining land might transition from coal production to productive new uses.

But this planning milestone will not be mistaken for a complete transition solution.

The (arguably) harder parallel task remains the one that sits outside the rezoning package: how NSW deals with mining lease relinquishment, residual mining hazard management and the transfer of ongoing responsibility once post-mining development becomes real. The draft planning framework is a major step forward in opening a pathway for rezoning, master planning and future development consent. What it does not yet resolve, and what it openly acknowledges will require further reform work, is the interface with the Mining Act and the mechanisms needed to make land transactions genuinely workable.

That is the next frontier.

For many sites, the central issue will not be whether a future use can be imagined or even master planned. It will be whether land can be released from mining tenure with enough certainty around residual risk, rehabilitation interfaces and ongoing management obligations to allow a transaction to occur. Investors can price risk. What they struggle with is uncertainty about who ultimately carries it, how long obligations persist, and whether a parcel can be transacted without the former mining operator remaining exposed to open-ended liability.

This is where NSW still needs to do the heavy lifting. If the state wants these pilot projects to become repeatable models, it will need workable mechanisms for the transfer or retention of residual risk, whether through a government-managed framework, successor security or bonding arrangements, residual risk payment models, consent-linked obligations on a developer, or a hybrid of these tools. The exact model can be debated. The need for one cannot.

That is why the Hunter’s pilot project milestone is worth celebrating, but also worth reading carefully. The real progress here is not only the land use vision. It shows the NSW government intent to deliver planning pathways that will meet the economic transition challenge in the Hunter. A key outstanding task to deliver the jobs and investment we need is to make sure the mining title, relinquishment and residual risk frameworks evolve in parallel.

If that happens, Macquarie Coal and Mt Arthur will be more than successful pilots and will deliver a genuine template for how NSW mining regions can turn former mine land into future industry, investment and jobs.

Mine closure costs have a habit of arriving late in the conversation.

They are often discussed late, challenged late and corrected late. By the time the true cost of closure is properly understood, the mine plan, asset valuation, rehabilitation strategy, accounting provision and public commitments may already have been built around a number that was too narrow, too optimistic or prepared for a different purpose altogether.

At the centre of the issue is a common misunderstanding: the assumption that a Rehabilitation Cost Estimate (RCE) is the same as an internal closure cost estimate.

It is not – in fact, they are fundamentally different tools.

“Too often, the Rehabilitation Cost Estimate is treated as the mine’s closure cost. It is not. An RCE is typically a regulatory bond estimate. The internal provision must be a properly scoped, study-aligned estimate built from a detailed WBS and supported by a clear Basis of Estimate. If closure costs are material to the business, they need to be estimated, reviewed and governed with the same discipline as the rest of the project. Otherwise, we risk mistaking a compliance number for the real cost of responsible closure.”

The RCE is typically a bond estimate

A Rehabilitation Cost Estimate is typically prepared to support a rehabilitation bond, security deposit or financial assurance requirement.

Its primary purpose is regulatory.

The RCE is generally intended to estimate the cost that may be required for a regulator or government to step in and complete rehabilitation works if the operator defaults. It is often prepared using regulator-prescribed methods, standardised assumptions, default rates, template structures and defined rehabilitation domains.

For that purpose, it has value.

But that does not make it a complete internal closure estimate.

An RCE is not usually designed to reflect the company’s preferred closure strategy, commercial execution model, accounting provision, life-of-mine planning assumptions or full residual liability position.

It may not fully capture the way the company actually intends to close the asset.

It may not reflect internal delivery efficiencies, staging, procurement strategy, owner’s costs, indirect costs, post-closure risk management or the full range of closure obligations that sit outside the bond calculation.

Yet we still coming across site accountants and managers who rely on the RCE as the internal closure estimate.

It simply is not.

An RCE is typically a regulatory bond estimate.

An internal closure estimate is a business, accounting, planning and governance estimate.

They may inform each other, but they should never be treated as interchangeable.

Why the distinction matters

Using an RCE as the internal closure cost estimate can materially understate the true closure liability.

That has consequences across the business. It can affect asset valuation, life-of-mine planning, Ore Reserve economics, accounting provisions, transaction due diligence, capital allocation, board reporting, investor confidence and closure readiness.

A bond estimate is usually designed around a regulator’s security framework.

An internal estimate should be designed around the company’s actual closure obligation.

Those are not the same question.

The RCE asks, in effect:

What amount of security should be held to protect the regulator and the community if the operator defaults?

The internal estimate should ask:

What will it actually cost us to close this asset responsibly, safely, lawfully and in accordance with our commitments?

Those two questions can produce very different answers.

A proper internal provision needs structure

An internal closure provision should not be a copied RCE, a high-level benchmark or a single line item in a financial model.

It should be assessed against a detailed Work Breakdown Structure, or WBS, that reflects the actual scope of closure.

That WBS should break closure into logical, auditable and costable packages, including planning, approvals and studies; progressive rehabilitation; final landform construction; demolition and decommissioning; asset recovery and salvage; hazardous materials and waste management; contamination assessment and remediation; water management and treatment; mine sealing and geotechnical controls; infrastructure removal; access tracks, drainage and erosion controls; monitoring and maintenance; stakeholder engagement and reporting; owner’s costs, project management and indirect costs; and contingency, escalation and residual risk allowances.

The estimate should also be supported by a clear Basis of Estimate.

That Basis of Estimate should explain what the estimate is based on, what is included, what is excluded, what assumptions have been made, what quantities and rates have been used, what level of engineering definition supports the estimate, what risks remain unresolved, and what level of accuracy is being claimed.

Without a WBS and a Basis of Estimate, it is very difficult for management, auditors, boards or investors to understand whether the provision is complete, reasonable or aligned with the actual closure obligation.

The estimate must mature with the study

Closure cost estimates should mature as the project matures.

A conceptual closure strategy should not carry the same estimating confidence as a detailed closure execution plan. Equally, a feasibility-level mine plan should not rely on a closure estimate that remains at a broad benchmarking level.

As projects move from concept, pre-feasibility, feasibility, operations, late-life planning and execution, the closure estimate should also move through increasing levels of definition.

That means improving scope definition, domain-based quantities, demolition and decommissioning assumptions, rehabilitation methods, material balances, water management and water treatment assumptions, contamination liabilities, mine sealing and residual geotechnical risks, final landform drainage performance, long-term monitoring and maintenance requirements, post-closure obligations, contractor rates, productivity and indirect costs, owner’s costs, contingency and escalation assumptions.

The estimate should be continually reviewed and updated so that its level of accuracy matches the relevant study protocol.

A PFS-level closure estimate should have the scope definition, contingency, risk allowance and accuracy range expected for a PFS.

An FS-level closure estimate should have the engineering definition, quantity confidence, procurement assumptions, schedule logic and cost accuracy expected for an FS.

Closure should not sit outside the study process.

It should be estimated with the same discipline as the mining, processing, infrastructure and sustaining capital components of the project.

The level of estimate should be clear. The confidence range should be clear. The exclusions should be clear.

A single closure number without context is not enough.

JORC is lifting the bar

Closure costs are also becoming more important in public reporting.

The JORC Code is built around the principles of transparency, materiality and competence. Where closure costs, environmental obligations, rehabilitation commitments or post-mining liabilities are material to the economics of a project, they need to be properly considered and transparently explained.

That matters because closure is no longer a peripheral issue.

Closure can materially affect Ore Reserve economics, project value, residual liability, financing and transaction due diligence, social licence, regulatory approval pathways, board confidence and investor confidence.

If closure assumptions are material to the economics of a project, they need to be capable of being defended.

Why closure costs are so often underestimated

In practice, closure costs are often underestimated because the early estimate is too narrow, too generic or based on the wrong estimating framework.

The issue is not always the unit rate.

Often, the issue is the scope.

Common omissions include demolition and decommissioning complexity, hazardous materials and waste classification, contaminated land investigation and remediation, water treatment beyond mining, long-term monitoring and maintenance, mine sealing and subsidence risks, final landform drainage performance, approvals, consultation and specialist studies, indirect costs, owner’s costs and contractor margins, schedule risk and escalation, and residual risks that remain after rehabilitation is complete.

A low closure estimate can look attractive in the short term.

But it can distort asset value, understate liabilities, misinform investment decisions and leave management teams with a funding gap later in the mine life.

A robust closure provision helps boards, executives, technical teams and investors understand the real cost of responsible closure and the value of making better closure decisions earlier.

Closure is not just an environmental obligation.

It is a material business issue.

And an RCE should never be mistaken for the full internal cost of closure.

Across the mining sector, a quiet but important shift is underway. Mine closure is no longer judged solely on whether a site can be made safe, stable and compliant. Increasingly, the question is whether former mine land can support a second life.

That second life could take many forms: renewable energy, industrial redevelopment, water storage, conservation, agriculture, logistics or recreation. The concept is compelling. Large disturbed landholdings, existing access, power corridors and regional workforces can make former mine sites look like prime candidates for beneficial reuse.

But beneath that promise lies a harder reality. For future developers, the biggest risks are rarely visible from the surface. They sit in the technical detail: unstable landforms, reactive waste materials, underground workings, water management legacies, buried services, mine subsidence, tailings storage facilities and the unresolved liability that can remain with the mining company long after production ends.

For anyone looking to turn former mine sites into long-term assets, the engineering questions are not secondary. They are the project. It is critical they are understood.

Land use compatibility starts with the landform

One of the most important and most overlooked questions in post-mining redevelopment is whether the proposed land use is actually compatible with the landform left behind.

Too often, post-mining land uses are discussed as though any rehabilitated surface can be adapted for almost any purpose. In reality, some land uses are simply not compatible with the physical and geotechnical condition of the final landform. They were never intended at the outset, and forcing them onto a site after mining can create technical, financial and legal problems that are very difficult to unwind.

A mine landform is usually designed first and foremost to achieve closure outcomes: safety, stability, erosion resistance, drainage control and risk containment. That is not the same thing as designing for industrial development, public infrastructure, agriculture or long-term structural loading.

The clearest example is building on unconsolidated backfill. A backfilled void or filled area may be acceptable within a closure framework, but that does not mean it is suitable for buildings, hardstand, warehouses, substations or other infrastructure. Unconsolidated fill can settle over time, move differentially, respond poorly to water infiltration and perform unpredictably under load. Even where it appears visually stable, it may remain unsuitable for fixed development for decades, or permanently.

That is the broader lesson. A final landform may be compatible with passive open space, habitat creation or limited grazing, but entirely unsuitable for buildings, public access or intensive industrial reuse. Compatibility must be tested honestly and early. A desirable post-mining land use is not automatically an achievable one.

The real question is whether it will remain stable over decades under rainfall, erosion, settlement, vegetation change, extreme weather and new loading from infrastructure or public access. Waste rock dumps, tailings facilities and reshaped void areas may satisfy closure criteria in a mining context, but still fall short of what is needed for a second-life land use.

This is where many reuse concepts begin to unravel. Sites are often described as rehabilitated when they are only closure-ready in a narrow compliance sense, not development-ready in an engineering one.

Geochemistry can undermine even a stable site

A landform can be geotechnically sound and still be unfit for reuse. Geochemistry is often the quieter, more persistent constraint.

Waste rock, tailings, low-grade ore, pit backfill and historical fill materials can all generate long-term risks if they contain acid forming or potentially acid forming material, elevated salts, metals or other contaminants. Those risks may not be obvious until groundwater rebounds, seepage pathways change, or future earthworks disturb materials that were designed to remain encapsulated.

For a future developer, that changes everything. A closure strategy may have relied on containment, low permeability covers and minimal disturbance. A redevelopment strategy may require trenching, service installation, regrading or foundations. That interface between closure design and future construction is where previously managed geochemical risk can be reopened.

In practical terms, any proposed reuse must be grounded in a detailed understanding of material characterisation, leachate potential, oxidation risk, long-term seepage chemistry and the durability of cover systems.

Water remains one of the longest-lived constraints

If there is one issue that routinely outlasts every other closure challenge, it is water.

Final void water balances, groundwater rebound, seepage from waste facilities, saline discharge, acid and metalliferous drainage, flood behaviour and long-term treatment obligations can all shape what is realistically possible on a former mine site. A site may seem suitable for redevelopment, but permanent water management infrastructure can quickly turn an opportunity into an operational burden.

This is not just an environmental issue. It is an engineering, financial and legal one. Where long-term water treatment or active controls are required, the future land use must be designed around that reality. Water cannot be treated as a postscript to redevelopment planning.

A particularly difficult issue on former underground mine sites is groundwater movement through connected workings. In many legacy coal and metalliferous districts, underground mine voids are not isolated. They can be hydraulically connected across panels, seams, headings or adjacent historical workings, allowing groundwater to migrate well beyond the immediate lease area. That means water can leave a site through underground pathways that are not obvious at surface and are difficult to monitor or control.

For a future developer, this matters enormously. It can affect water quality, discharge locations, pressure regimes, subsidence behaviour, the performance of seals and the extent of long-term liability. It also means a site boundary on a plan may tell only part of the hydrogeological story.

Underground workings change the risk profile completely

On former underground mine sites, the greatest risks may not be on the surface at all.

Old bord and pillar workings, stopes, shafts, adits, ventilation raises, partially collapsed voids and poorly documented mine plans can all create a very different development context. Surface rehabilitation does not remove the need to understand what remains below ground, how it behaves, and whether it can affect future land use.

That matters for everything from building placement to public access, drainage design and utility corridors. Collapse potential, progressive failure, gas migration, water discharge pathways and exclusion zones around mine openings all need to be considered from the outset.

A site can appear strategically located and physically attractive, but if the underground risk profile is not well understood, it may carry latent constraints that make large parts of the land unsuitable for development.

Mine sealing is not just a closure task

Mine sealing is often treated as a legacy closure item: shafts capped, adits sealed, openings backfilled, bunds installed. But for future developers, those measures are far from routine.

The real issue is whether the sealing design is appropriate for the proposed next use of the land. A closure treatment intended for restricted access and passive long-term management may not be adequate for a site supporting operating infrastructure, workforce access or public interface.

Developers need to know what openings remain, how they were treated, what standards were applied and what inspection or maintenance obligations continue. This is not a paperwork exercise. It is a key engineering and liability issue that should sit alongside geotechnical and civil due diligence, not in the appendix of an old closure report.

Mine subsidence can sterilise land that otherwise looks valuable

Subsidence remains one of the most significant constraints for former underground mine land, especially where future use involves fixed infrastructure or public access.

Depending on the mining method, depth, extraction ratio, pillar condition and groundwater influences, subsidence risk may be ongoing, residual or difficult to predict with confidence. Even where catastrophic collapse is unlikely, smaller-scale settlement, cracking and drainage change can be enough to make land unsuitable for development.

The implications are substantial. Buildings, roads, pipelines, buried services, drainage structures and transmission infrastructure can all be affected. So can insurability, maintenance costs and public safety.

For developers, this means that attractive location and available land area are not enough. Without detailed subsidence assessment, parts of a former mine site may remain effectively sterilised.

Tailings dams remain one of the hardest assets to repurpose

Few post-mining features are more difficult to repurpose than tailings storage facilities.

From a closure perspective, tailings dams are already among the most technically demanding landforms to stabilise and cover. They often involve soft, compressible and variable materials, ongoing consolidation, sensitivity to moisture conditions, seepage management challenges and strict requirements around long-term containment. Designing a closure cover that performs reliably over time is hard enough. Designing one that also supports a new land use is harder again.

Covering a tailings facility is rarely straightforward. Differential settlement can damage cover integrity. Surface water has to be carefully managed to avoid erosion and infiltration. Vegetation performance can be inconsistent. Gas, moisture and oxidation dynamics may change over time. Even achieving a durable, low-maintenance cover for closure purposes can require significant ongoing management.

That has direct implications for reuse. In many cases, tailings dams are fundamentally limited in what they can support after mining. Their geotechnical behaviour, settlement risk, contamination profile and containment role often make them unsuitable for buildings, buried services, heavy infrastructure or uses that require deep disturbance. Even apparently low-impact uses can be constrained by access requirements, cover protection needs and long-term monitoring obligations.

In simple terms, tailings dams are not blank canvases. In many cases, the most realistic post-mining outcome is controlled, low-disturbance land use with tight limitations, rather than ambitious redevelopment.

Underground services are often the forgotten constraint

Another major issue is buried infrastructure. Former mine sites commonly contain old electrical reticulation, pipelines, fuel lines, communications, dewatering systems, drainage networks, monitoring infrastructure and undocumented legacy utilities.

Some may be active. Some partially decommissioned. Some abandoned in place. Some associated with contamination or physical safety risks.

For any beneficial reuse proposal, that uncertainty matters. Buried services can conflict with foundations, trenching, civil works and utility corridors. Where they intersect with contaminated materials, unstable ground or former mine workings, the challenge becomes even more complex.

Historical drawings alone are rarely enough. A serious reuse proposal needs disciplined subsurface investigation, service validation and a clear decommissioning or retention strategy.

Existing infrastructure may save money, but only after rigorous testing

The attraction of reusing mine infrastructure is obvious. Roads, substations, workshops, rail links, hardstand areas, water storages and pipelines can make former mine sites appear redevelopment-ready.

But infrastructure reuse is rarely plug-and-play. Each asset needs to be tested for structural integrity, residual design life, corrosion, contamination, code compliance and suitability for its new purpose.

A haul road is not automatically suitable as a public or industrial access road. A former process pad is not automatically fit for redevelopment. A water storage built for mining operations is not automatically a viable long-term civil asset.

The opportunity is real, but only where engineering due diligence is equally real.

Liability does not vanish when a new use is proposed

This is where the legal and regulatory reality becomes critical. Under mining legislation, the mining company typically continues to carry responsibility for closure outcomes, rehabilitation performance, public safety and environmental obligations until the site has met the required legal standard for sign-off, surrender or relinquishment.

That liability can persist for years, particularly where residual risk remains around landform stability, contamination, subsidence, mine openings, water management, tailings facilities or long-term monitoring.

For future developers, that creates an important tension. A beneficial reuse concept may look commercially attractive, but the mining company must still consider whether that use disturbs engineered closure controls, increases public exposure, changes drainage behaviour, interacts with subsidence zones or reactivates previously managed risks.

That is why mining companies are often cautious. A new land use does not automatically transfer risk. In many cases, it can complicate it.

If beneficial reuse is going to succeed, responsibility for design assumptions, residual liabilities, disturbance of closure features and long-term maintenance obligations needs to be clear from the beginning.

The opportunity is real, but so is the complexity

None of this means mine site reuse is unworkable. In many cases, the opportunity is substantial. Former mine land can offer scale, infrastructure, access to power, industrial zoning advantages and proximity to regional supply chains that greenfield sites often cannot match.

Renewable energy, storage, logistics, circular economy uses, water-related infrastructure and carefully designed productive landscapes all remain strong possibilities.

But the projects most likely to succeed will be the ones that confront the engineering truth early. They will involve closure specialists, geotechnical engineers, geochemists, hydrogeologists, contamination experts, civil designers, subsidence specialists and legal advisers from the start, not as a final check before approval.

A second life is possible, but it must be engineered

The next generation of development may not begin on untouched land. It may begin on land that has already been mined, reshaped and partially rehabilitated.

That is a powerful idea. It offers the chance to turn closure from an endpoint into a transition, and liability into long-term value.

But that transformation will not be driven by vision alone. It will depend on whether the hard technical questions are properly answered: land use compatibility, landform stability, geochemistry, water, underground workings, mine sealing, subsidence, tailings constraints, buried services and residual liability.

For future developers of mine land, those are not side issues. They are the foundation of whether beneficial reuse is possible at all.

#MineClosure #MineRehabilitation #PostMiningLandUse #GeotechnicalEngineering #MineSubsidence #Tailings #Geochemistry #MiningLiability #ClosurePlanning #BeneficialReuse

The NSW Government’s newly released direction for coal mining to 2050 provides one of the clearest signals yet about how the sector is expected to evolve over coming decades.

At a high level, the message is balanced but firm. Coal will continue to play an important role in supporting the state economy, regional jobs and export markets, but that future will sit within tighter boundaries. The framework signals continuity for existing operations, stronger emissions expectations, no support for new standalone greenfield coal mines, and a more deliberate focus on how coal-producing regions prepare for structural change over time.

Importantly, one of the best outcomes from this release is that it provides greater certainty.

That certainty matters. It helps industry, government and regional communities make better decisions about investment, approvals, mine planning, closure and transition. Even where parts of the message are restrictive, clarity is still better than ambiguity. A known framework gives everyone a clearer basis for planning than an uncertain one.

Coal remains economically significant to NSW

The report is also a timely reminder that coal remains a major contributor to the NSW economy.

The 2025 calendar year statistics are significant:

• $2.7 billion in royalties
• 26% of the state’s merchandise export revenue
• 35 mines produced coal
• 23,800 people directly employed in coal mining
• $23.4 billion in export value

Those are not marginal numbers. They reflect an industry that still underpins regional employment, state revenue and export performance.

The report also reinforces that NSW coal continues to have a strong market in Asia, particularly because of its quality. Export destinations in 2025 were led by Japan (43%), China (27%) and Taiwan (10%), with additional demand from South Korea (4%), Vietnam (4%), Malaysia (4%), Thailand (3%) and India (1%).

That is an important point in this discussion. NSW’s high-quality coal still has demand in Asia, and that demand continues to support local jobs, regional economies and export income. So while the policy is clearly about managing a long-term transition, it also recognises the ongoing role of the sector in supplying established export markets.

What the policy direction is really saying

This is not a message of immediate withdrawal from the sector, nor is it a signal of unconstrained growth. It is a policy position built around three themes: support for existing mines, constraint on new greenfield development, and a growing focus on transition and post-mining land use.

The key principles are relatively clear.

NSW is indicating that the coal industry will continue to support local economies and deliver reliable supply to trading partners. Existing operations remain important, and the government recognises that there are sufficient coal reserves at or near many existing mines to meet forecast local and export demand through extensions.

At the same time, the State has drawn a distinct line on new development. NSW will not consider applications for new greenfield coal mines. Exploration will be permitted near existing mine sites, but new greenfield coal exploration areas will not be opened up, and government investment in coal exploration will end.

For existing mines and extensions, the pathway remains open, but only through robust project-by-project assessment and increasingly strong regulatory expectations. Emissions are clearly central to this. Scope 1 and Scope 2 emissions, as well as local impacts and continuing consideration of Scope 3 emissions, will remain part of the assessment framework. The industry is also expected to keep contributing to the State’s net zero objectives through operational abatement, monitoring and the use of offsets where abatement is not feasible.

In simple terms, NSW is saying: existing mines can continue and may extend where justified, but the sector’s future must align with stronger environmental controls, emissions management and a planned approach to economic transition.

What this means for the sector

For industry, this creates a clearer picture of where investment and strategy should be focused.

The biggest winners from a certainty perspective are existing operations with extension potential. Mines with reserves near existing footprints now have a more visible policy pathway than speculative new standalone developments. The framework supports continuity, but it also raises the bar on how that continuity is justified.

That certainty is valuable. It gives proponents, investors, communities and regulators a more stable basis for planning. It also provides a more realistic foundation for conversations about closure, regional development and future land use.

For proponents, this means the future of coal mining in NSW will increasingly be shaped by:

• extension pathways rather than greenfield expansion
• stronger emissions performance and clearer abatement expectations
• continued scrutiny of local and broader environmental impacts
• rehabilitation that is not treated as a final compliance step, but as part of a longer-term land use strategy

For coal regions and communities, the framework also acknowledges a reality that has been building for some time: even where existing coal mines continue, change in global coal demand will influence the long-term future of regional economies. The role of the Future Jobs and Investment Authority, and the commitment to implement the recommendations of the Legislative Council inquiry into beneficial and productive post-mining land use, reinforces that transition planning is no longer peripheral. It is now part of the mainstream policy conversation.

The most important opportunity: reuse of mine land

For me, one of the most significant elements in the framework is not just what it says about mining approvals, but what it says about former mining land.

This deserves real emphasis.

The report points to a future in which former mining land can support new industries and jobs. It recognises that the reuse of existing mine infrastructure and assets may create opportunities to establish new economic activity, attract investment and deliver long-term regional employment. It also makes clear that government intends to play a more active role in providing guidance, planning support and strategic coordination to help unlock these outcomes.

That is a very important shift in emphasis.

Too often, post-mining land has been treated primarily as a closure liability, something to be stabilised, secured and left behind. While safe and stable rehabilitation remains essential, that cannot be the end of the conversation. The stronger opportunity lies in recognising post-mining land as a strategic regional asset.

The reuse of mine land has the potential to reshape how we think about closure and transition.

Done well, it can:

• create a platform for new industries
• make productive use of existing infrastructure and disturbed land
• attract investment into regional economies
• support job creation beyond the life of the mine
• turn rehabilitation from a compliance endpoint into an economic development opportunity

That does not mean every site will support every use. The report rightly notes that future land uses will always depend on site-specific physical, environmental and economic factors. Some sites will lend themselves to new industrial or energy uses. Others may support conservation, agriculture, water management, logistics or mixed outcomes. The point is not that every site has the same answer. The point is that reuse should now be part of the planning mindset much earlier in the mine life cycle.

Still work to do: enabling flexibility in the planning pathway

While the direction is positive, there is still important work to do in enabling greater flexibility within planning and approval pathways to support beneficial reuse outcomes.

In particular, there remains a real challenge where a mine operator or landholder identifies a sensible and productive post-mining land use, but the pathway to achieve that outcome may require reopening or materially amending full development consents. In practice, that can create delay, cost and uncertainty, even where the proposed reuse is logical, lower impact and strongly aligned with regional needs.

If NSW is serious about encouraging beneficial reuse of mine land, the planning framework should continue evolving to allow more practical pivot points. There should be mechanisms that enable a transition to an appropriate beneficial reuse outcome without automatically having to open up the full consent architecture each time.

That does not mean lowering standards or avoiding proper assessment. It means creating a planning system that is flexible enough to support adaptive reuse, respond to new opportunities, and recognise that the best post-mining outcomes may become clearer over time as markets, technologies and regional priorities evolve.

This is where further reform could add real value. Greater certainty at the strategic level is a big step forward, but flexibility at the implementation level will be just as important if the policy is to deliver real outcomes on the ground.

Final reflection

The NSW coal framework to 2050 is, in many ways, a statement of managed transition.

It recognises that coal still delivers very substantial value to NSW through royalties, export income, employment and regional economic activity. It also acknowledges that NSW’s high-quality coal continues to attract demand in Asia, particularly in established export markets such as Japan, China and Taiwan.

At the same time, it supports the continuation of existing coal mining under stricter expectations, closes the door on new standalone greenfield coal mines, reinforces the importance of emissions management and robust regulation, and places greater attention on the future of coal-producing regions and the productive reuse of former mining land.

One of the best aspects of the framework is that it now provides a greater degree of certainty. That is valuable in itself.

The next step is making sure the planning system is flexible enough to convert that strategic direction into practical reuse outcomes on the ground.

Because the long-term success of mining regions will not be measured only by how well mines close. It will be measured by how effectively former mine land is repositioned to support the next chapter of regional industry, investment and employment.

The real opportunity is to stop seeing mine closure as the end of the story.

Instead, we should see the reuse of mine land as the bridge between resource extraction and regional renewal.

By Andrew Hutton

In today’s mining landscape, closure planning isn’t a box-ticking exercise. It’s a strategic, regulated, stakeholder-driven process that spans the full life of a mine. While many organisations rely on site-specific closure plans, there’s a foundational layer that often goes missing: a corporate-level Mine Closure Standard that is fit for purpose.

Not generic. Not templated. And certainly not borrowed from someone else’s operations.

A true Mine Closure Standard must reflect the unique nature of a company’s portfolio, risk profile, stakeholder expectations, jurisdictional footprint, and ESG commitments. And crucially, it needs to be more than an internal policy – it needs to be supported by the tools that help people on the ground do the work. That’s where the Recipe Book comes in.

What Is a Fit-for-Purpose Closure Standard?

A Mine Closure Standard is a corporate protocol or directive that articulates:

• The company’s position on closure
• The minimum required elements for every closure plan
• Governance, review, and sign-off expectations
• Linkages with financial provisioning, permitting, ESG, and operations

But a fit-for-purpose standard goes further. It:

• Adapts to different types of sites (greenfield, operational, legacy, high-risk, low-risk)
• Reflects the jurisdictions you operate in
• Scales with your internal capabilities and maturity
• Clearly distinguishes between mandatory corporate expectations and site-level flexibility

The best standards are written with both executives and site planners in mind. They bridge high-level commitments with practical application and are continually updated and reviewed as the company and industry get more experience with mine closure.

Why One Size Doesn’t Fit All

No two mining companies are the same. Some are global enterprises, listed and operate in multiple countries and jurisdictions whilst at the other end the other might only have a single operation. Even within a single company, closure liabilities, environmental context, land use pressures, and community expectations vary significantly. That’s why adopting a generic or templated approach to closure standards can create real risk:

• Plans that meet the letter of the law, but not the intent
• Misalignment between operational teams and corporate strategy
• Missed opportunities for progressive closure or relinquishment
• Surprise liabilities at the end of mine life

A fit-for-purpose standard gives internal teams clarity. It tells them what success looks like, what must be done, and what can be tailored.

What Belongs in a Fit-for-Purpose Mine Closure Standard?

A strong standard sets out:

1. Purpose and Applicability

• Who the standard applies to (e.g. all managed assets)
• How it integrates with the company’s life of mine and ESG frameworks

2. Guiding Principles

• Closure is integrated from inception
• Progressive rehabilitation and risk reduction are core
• Engagement is continuous and inclusive

3. Minimum Requirements for Plans

• Closure objectives and post mining land use scenarios
• Risk assessments and materiality reviews
• Closure criteria and monitoring frameworks
• Cost estimation and provisioning methodology

4. Governance and Sign-off

• Approval gates across the study phases (concept, PFS, FS, operations)
• Closure maturity models and triggers for updates
• Delegations of authority

5. Interface with Other Systems

• Environmental management
• Permitting and compliance
• Finance and corporate reporting

This standard becomes the backbone of closure governance across the business.

The Role of a “Closure Recipe Book”

A key insight: the standard and the plan are not enough. Site teams need a bridge between the two.

The Recipe Book is that bridge. It is a separate but companion document — an addendum, attachment, or operational guide that walks closure practitioners through the process.

It includes:

• A detailed Work Breakdown Structure (WBS)
• Templates, checklists, and tools for developing closure plans
• Guidance for building accuracy and completeness across project stages

It sets out what should be considered at each step of closure planning, from concept study through pre-feasibility and feasibility. Not everything is mandatory, but nothing should be ignored. That’s where the “if not, why not” principle comes in:

• Every checklist item must be considered
• If it’s excluded, a rationale must be provided

This principle ensures transparency and defensibility, especially in regulatory and stakeholder engagement contexts.

Approval Gates: A Managed Process

A fit-for-purpose standard and recipe book build approval gates into the closure planning process. These checkpoints align with broader project development and financing processes:

• Concept to PFS: Is closure risk identified? Are viable land use options defined?
• PFS to FS: Are closure objectives and criteria developed? Is costing reliable?
• FS to Operations: Has closure been integrated into scheduling and budgeting?
• Operations to Closure: Are relinquishment pathways and stakeholder expectations aligned?

These gates enforce discipline, encourage early planning, and ensure funding is progressively locked in.

Visualising the Work Breakdown Structure (WBS)

To help guide closure planning practically, the Recipe Book should include a WBS broken into thematic elements. A simplified version of the key aspects is listed below:

1. Closure Context and Objectives

• Final Land Use Scenarios
• Closure Vision and Goals
• Regulatory and Legal Framework
• Obligations Register

2. Baseline Data and Studies

• Environmental Baseline (soil, water, air)
• Social and Cultural Context
• Closure Knowledge Gaps

3. Closure Design and Implementation

• Rehabilitation Design and Landform Modelling
• Water Management and Voids
• Decommissioning of Infrastructure

4. Risk and Cost Management

• Closure Risk Assessment
• Financial Provisioning
• Contingency Planning

5. Monitoring, Evaluation, and Relinquishment

• Completion Criteria
• Monitoring and Maintenance Plans
• Relinquishment and Handover Process

6. Stakeholder Engagement and Social Transition

• Community Engagement Strategy
• Traditional Owner Involvement
• Social Transition and Economic Legacy

Each of these components is layered across study phases, building in rigour and reducing risk as you move toward closure.

Moving Beyond High-Level Frameworks

The ICMM Integrated Closure Good Practice Guide is an excellent starting point. It provides principles and a maturity model. But it does not offer the detailed, site-ready tools that practitioners need to deliver closure plans that are costed, integrated, and defensible.

That’s why internal standards and recipe books are essential. They turn policy into practice.

Why It Matters

Getting closure right is no longer optional. Investors, regulators, Traditional Owners, and communities are all watching.

A fit-for-purpose closure standard:

• Avoids surprise liabilities
• Builds trust through transparency
• Protects reputational value
• Enhances relinquishment success
• Aligns closure to ESG and decarbonisation goals

But it must be backed by clear tools, trained practitioners, and governance that ensures closure is not left until the end.

Because closure isn’t just the last chapter of a mine. It’s the beginning of what comes next.

Andrew Hutton is Managing Director of IEMA, a project management & environmental management consultancy specialising in mine closure, rehabilitation, and legacy land use solutions. He has worked across Australia and internationally helping companies design and implement fit-for-purpose closure governance frameworks.

By the IEMA – Integrating Sustainability, Business & Community

A complex industrial closure was approaching the hard part, proving it would remain safe, stable, and compliant in an environment where climate change may move the goal posts in the long term future. IEMA – Integrating Sustainability, Business & Community was brought in to answer the question regulators, investors, and communities are all asking: Will this plan still work in 2050?

The brief

Stress-test a full closure plan end to end against plausible climate futures. Translate the findings into concrete actions that shorten the road to sign-off and reduce surprises after handover.

What we did

• Followed the evidence, not the vibe. We assessed risks under IPCC RCP 2.6, 4.5, 8.5 to 2050, aligned to national sustainability reporting expectations.
• Broke down silos. Hydrology, geotech, ecology, climate science, and socio-economics were integrated, because landforms, water, and community impacts don’t behave in isolation.
• Tested what matters. We looked for climate assumptions inside designs and models, covers, caps, retention basins, seals, water balances, flood modelling, not just mentioned in the narrative.
• Rated controls the way auditors do. Likelihood × consequence across environmental, social, operational, financial, and reputational dimensions, with clear evidence trails.

What we found

• 19 material risks surfaced: 11 physical (stability, potential subsidence/sinkholes, erosion, surface–groundwater interactions, retained infrastructure) and 8 transition (regulatory shifts, disclosure, reputation, residual-risk governance).
• The pattern: Many controls were in progress or untested. The work had started, but assurance and climate scenario integration weren’t yet bulletproof.

Commercial impact: Untested controls and ambiguous residual risk are what delay relinquishment. Fixing them brings timelines forward and reduces cost-of-waiting.

The 10 recommendations that changed the trajectory

Here’s where the assessment turned into momentum. We translated risk into ten concrete recommendations, design tweaks, modelling upgrades, and governance shifts, that hard-wired climate futures into the closure program and removed the roadblocks to sign-off. In short: practical steps, clear owners, measurable outcome

1. Bake climate futures into design specs (RCP 2.6/4.5/8.5) for covers, caps, drainage, storage.
2. Stand up post-execution monitoring & maintenance with KPIs, triggers, and a realistic budget.
3. Lock corporate–project alignment on required scenarios and disclosures.
4. Define a residual-risk framework (ownership, funding, monitoring, reporting).
5. Re-run flood modelling on the final landform under RCP 4.5/8.5 to validate basin sizing and spillways.
6. Couple the water balance (surface + groundwater) for post-closure conditions with climate inputs.
7. Resolve heritage infrastructure pathways to remove safety/liability ambiguity.
8. Inform seal designs with hydrogeology that reflects future groundwater behaviour.
9. Adopt climate-ready revegetation (species mix, establishment, success criteria, adaptive management).
10. Institutionalise regulatory horizon-scanning between corporate and site teams.

Results that matter to decision-makers

For decision-makers, the outcomes are clear: residual risk needs to be acceptable across all climate scenarios; climate futures are required to be embedded as traceable design inputs and validated against extremes; governance needs to be audit-ready with defined roles, artefacts, and decision trails that build regulator and investor confidence.

When to reopen the file (so you don’t get caught out)

There is a need to reopen the assessment whenever the ground shifts, think changes to IPCC scenario assumptions or national reporting rules; updates to closure methodology, final landform, or land use; modifications to water infrastructure or its performance; heightened sensitivity of nearby community assets; or revised corporate risk appetite and disclosure expectations.

The takeaway

If your closure case hinges on “we think this will hold,” expect delays. If it demonstrates how it holds across plausible futures, with evidence in the specs, budgets, and governance, approvals get simpler, and handover gets faster.

Considering a closure in 2025?

IEMA – Integrating Sustainability, Business & Community helps asset owners prove climate resilience, compress approval timelines, and de-risk handover with a practical, evidence-first playbook. If you want your next regulator meeting to start with “we’ve already tested that,” let’s talk.