BCI Minerals reaches 90% construction at Mardie as crystallised salt climbs to 266,000 tonnes

BCI Minerals Limited (ASX: BCI), the West Perth-based resources developer constructing the Mardie Salt Operation in Western Australia’s Pilbara region, reported that its salt-first development was approximately 90% complete at 30 September 2026, excluding additional crystalliser lining work. The 20 October quarterly update showed the volume of crystallised salt increasing to approximately 266,000 tonnes from 49,000 tonnes in the preceding quarter, while the associated port development reached 98% completion. BCI Minerals reported approximately A$316 million in available liquidity against an estimated A$178 million in remaining construction expenditure and maintained its target for first salt shipment during calendar 2027. The project is moving closer to its first commercial revenue, although successful completion of the salt wash plant, crystalliser works and export logistics remains necessary before shipment operations can begin.

How close is BCI Minerals to completing the Mardie Salt Operation in Western Australia?

BCI Minerals reported construction progress of approximately 90% at the September quarter-end, excluding the additional scope associated with lining crystalliser cells. Including that work, the completion measure was approximately 87%. The difference reflects the additional construction activities required to prepare the full operating system rather than a contradiction between the two reported figures. Remaining works include portions of the crystalliser lining programme, salt wash plant, jetty-related activities and associated infrastructure.

The Port of Mardie reached approximately 98% completion during the quarter. Dredging operations had been completed, while major marine construction elements including navigation and mooring infrastructure were substantially finished. Installation of the conveyor system connecting salt handling facilities with the export operation was also progressing. These developments reduce some of the construction risk associated with moving product from the processing facilities to ships.

Port readiness remains distinct from full operating readiness. Even after civil and marine works are completed, equipment must undergo commissioning, testing and integration with the materials-handling system. Salt must be available in a form that meets the intended product specifications before it can be loaded and exported. The company’s first shipment target therefore depends on both the salt production cycle and the export infrastructure.

Mardie is a large-scale industrial salt project located on the Pilbara coast. Its production process relies predominantly on natural evaporation of seawater, using extensive pond infrastructure to concentrate brine before salt crystallises. The operation is designed to produce approximately 5.35 million tonnes of industrial salt annually at nameplate capacity. Achieving that level requires a sustained operating system rather than the completion of construction alone.

Why did crystallised salt volumes rise from 49,000 tonnes to 266,000 tonnes in one quarter?

BCI Minerals reported approximately 266,000 tonnes of crystallised salt pavement at 30 September, compared with around 49,000 tonnes at the end of June. The increase of 217,000 tonnes provides evidence that the seawater evaporation and crystallisation process is progressing. It also demonstrates the time-dependent nature of solar salt production, where seawater moves through a sequence of ponds before salt accumulates in harvestable crystalliser cells. The material must still be harvested, washed and prepared for shipment before generating commercial sales.

Twelve crystalliser cells had been commissioned by the September quarter-end, increasing from eight in the preceding period. Additional lining work is scheduled to continue as the project moves toward its full configuration. The commissioning of more cells expands the area available for salt production and provides greater operational flexibility. However, cells may progress through different stages of brining and crystallisation, meaning they will not necessarily generate equal output during the same period.

Mardie’s production cycle differs from conventional mining operations because natural evaporation plays a central role. Weather conditions, evaporation rates, rainfall and the concentration of brine can influence how quickly salt becomes available. The company’s 2027 first shipment target explicitly remains subject to weather and evaporation conditions. These variables are important when evaluating the schedule because they cannot be controlled as directly as the timing of mechanical equipment installation.

The increase in crystallised material represents tangible production progress, but the figure should not be confused with refined salt ready for export. The harvested material must pass through the proposed wash plant and handling facilities before meeting customer requirements. The operation must also establish reliable recovery and quality control procedures. The next significant commercial milestone will involve processing suitable quantities of salt into a saleable product and moving them through the completed port.

How does BCI Minerals’ A$1.443 billion construction budget compare with its remaining funding?

BCI Minerals reported that approximately A$1.265 billion had been spent on salt-first construction at the end of September. A further A$64 million was committed, with approximately A$114 million remaining uncommitted against the A$1.443 billion construction budget. These figures reconcile to the approved construction envelope and provide a clearer view of remaining commitments. The total estimated construction cost to complete was approximately A$178 million.

The company reported available liquidity of approximately A$315.7 million in cash and relevant funding capacity. A broader available funds measure, including bank guarantees, reached approximately A$337.4 million. Bank guarantees should not be treated as unrestricted cash because they serve specific contractual purposes. The distinction is important when assessing how much funding is available for construction and working capital.

Comparing the A$315.7 million liquidity figure with A$178 million in construction costs to complete suggests an indicative difference of about A$137.7 million. However, that arithmetic does not establish surplus cash available for distribution because operating readiness, working capital and other financial commitments must also be funded. BCI Minerals has stated that the salt-first project is fully funded through the remaining construction programme and associated working capital requirements. The adequacy of that position will depend on maintaining expenditure within the current forecasts.

Cumulative expenditure associated with Mardie had reached approximately A$1.586 billion, including costs beyond the construction amount reported in the salt-first budget. This wider figure provides context for the substantial capital already committed to the project. A capital-intensive development may have a relatively modest amount left to spend while still requiring successful commissioning before commercial returns begin. The financial risk increasingly concerns turning the completed assets into reliable production and cash flow.

Why does the Mardie port matter to the project’s long-term export competitiveness?

Mardie is designed as an integrated production and export operation, with salt moving through harvesting, washing, storage and dedicated marine infrastructure before shipment. The development of an associated port allows BCI Minerals to establish a logistics system tailored to bulk salt exports. This can be commercially important because industrial salt has a relatively low value per tonne compared with higher-value minerals. Handling and shipping costs therefore influence the amount of revenue retained from each shipment.

The completed dredging programme and advanced marine construction reduce major infrastructure uncertainties. The salt wash plant and conveyor system must now be integrated with the port to create a functioning export chain. Delays in one component could limit the use of assets that are already mechanically complete. A dependable operating system will require consistent coordination across production, processing and vessel loading.

Mardie’s location on the Pilbara coast provides access to Asian industrial customers, including chemical manufacturers and other industries that use high-purity salt. The project’s nameplate scale could make it a substantial supplier if commercial production reaches its intended level. However, logistics costs, quality specifications and customer pricing will determine competitiveness. A large production capacity does not guarantee a particular sales margin.

The project also benefits from its long-duration resource model, using seawater rather than a finite mined salt deposit. This may provide an extended production opportunity once the infrastructure is established. Nevertheless, evaporation facilities require ongoing maintenance, pond management and environmental compliance. Long-term operating returns will depend on sustained plant performance and demand for the finished product.

How does Asian industrial salt demand influence BCI Minerals’ long-term revenue opportunity?

BCI Minerals has highlighted market research indicating substantial growth in Asian industrial salt demand during the coming decade. The company’s October presentation cited an expected increase of approximately 37 million tonnes annually in regional demand against around 10 million tonnes of additional supply. The difference implies a potential shortfall of approximately 27 million tonnes annually under those forecasts. These are industry projections rather than guaranteed future market conditions.

Industrial salt is used in chemical manufacturing, including processes associated with chlorine, caustic soda and other products. Demand can therefore be influenced by manufacturing activity, water treatment requirements and investment in chemical production. The market extends beyond ordinary food consumption, giving large producers exposure to industrial supply chains. However, prices and trade flows may change as new production capacity enters the market.

Mardie’s planned production of approximately 5.35 million tonnes annually would represent a meaningful contribution to regional supply if nameplate capacity is achieved. Using the projected 27-million-tonne market gap as a comparison, the nameplate operation would represent around one-fifth of that forecast shortfall. This is an illustrative capacity comparison, not a prediction of market share. The actual demand available to BCI Minerals will depend on customer contracts, product quality and competition.

The project’s use of solar evaporation provides a different energy profile from operations that rely more heavily on mechanical processing. Natural evaporation may reduce some energy requirements, but large pond systems and associated infrastructure still require substantial capital and operating expenditure. The long-term economic value will depend on the complete cost structure rather than the evaporation method alone. Commercial performance after the first shipments will be necessary to establish the project’s competitive position.

What remains before BCI Minerals can develop sulphate of potash alongside its salt business?

BCI Minerals’ wider project includes a potential sulphate of potash development in addition to industrial salt production. Sulphate of potash is a fertiliser used in agricultural applications requiring potassium and sulphur. The product could provide a separate revenue opportunity using brines associated with the broader salt production process. However, the potash development remains distinct from the funded salt-first construction programme.

The company has completed front-end engineering and selected technical work associated with its proposed sulphate of potash pilot plant. The next stages include detailed engineering, procurement, modular construction and delivery of equipment to Mardie. BCI Minerals expects to undertake an extended pilot operating programme before considering a full-scale development decision. This sequencing is intended to provide more reliable technical and operating information.

Pilot testing can be important because recovery, product quality and operating costs must be demonstrated under representative conditions. A process that performs successfully in laboratory studies may require modifications when operated continuously with real project brines. BCI Minerals will need to establish the quality and consistency of sulphate of potash production before committing to major commercial infrastructure. Any full-scale investment would require its own funding and financial assessment.

The immediate financial priority remains completion of the industrial salt operation. Adding potash development could create longer-term diversification, but the company must first establish reliable salt production and export cash flow. Successful delivery of the first business may provide a stronger foundation for evaluating the second. Until a formal decision is made, potash production should remain a future development opportunity rather than an operating revenue stream.

What will determine whether Mardie begins generating salt export revenue during 2027?

BCI Minerals has made substantial progress on construction, crystallisation and port infrastructure, leaving a more concentrated set of activities to complete. The salt wash plant, crystalliser lining and integrated materials-handling system remain particularly important. These systems must operate reliably before commercial shipments can begin. The timing of the first vessel will also depend on sufficient salt production under prevailing evaporation conditions.

The project has a reported funding position capable of supporting the remaining salt-first expenditure and working capital requirements. This reduces near-term financing uncertainty relative to a development still seeking its principal construction capital. However, the company must manage commissioning costs and maintain liquidity before customer receipts begin. Any change in construction requirements or the production timetable could affect the funding position.

The October update demonstrates that Mardie is approaching a transition from infrastructure development toward commercial operation. The increase in crystallised salt, advanced port construction and funded capital programme provide tangible evidence of progress. The next decisive developments will be completion of the salt wash plant, commissioning of export systems and confirmation of the first shipment. These milestones will establish whether the project’s multi-year investment can begin generating the recurring revenue expected from its industrial salt capacity.

Key takeaways from BCI Minerals’ September 2026 Mardie project update

• Salt-first construction reached approximately 90% completion, excluding additional crystalliser lining.
• Completion was approximately 87% when that additional scope was included.
• Crystallised salt increased from 49,000 tonnes to 266,000 tonnes.
• Twelve crystalliser cells were commissioned, compared with eight previously.
• Port construction reached approximately 98% completion.
• Construction expenditure reached A$1.265 billion against a A$1.443 billion budget.
• Estimated construction costs remaining were approximately A$178 million.
• BCI Minerals reported approximately A$315.7 million in available liquidity.
• Mardie is designed for approximately 5.35 million tonnes of annual salt production.
• First salt shipment remains targeted for calendar 2027, subject to commissioning and evaporation conditions.