Tungsten Mining NL's Watershed Preliminary Economic Evaluation reveals a robust project with a pre-tax NPV of A$1.3 billion and a swift payback, aiming for first production by 2027 amid tightening global tungsten supply.
- Watershed project targets first production in 2027
- Pre-tax NPV of A$1.3 billion and IRR of 198%
- Initial capital expenditure estimated at A$274 million
- Operating costs projected at US$416 per MTU
- Multiple non-dilutive funding pathways underway
Watershed Project Positioned for Rapid Development
Tungsten Mining NL (ASX:TGN) is advancing its Watershed tungsten project in Queensland with a Preliminary Economic Evaluation (PEE) study that delivers compelling economic fundamentals amid a tightening global tungsten market. The company is targeting a Final Investment Decision (FID) in September 2026, aiming to commence mining in the first quarter of 2027 and reach nameplate production by the second half of that year.
The PEE study outlines a pre-tax net present value (NPV) of A$1.3 billion at an 8% discount rate, underpinned by a robust internal rate of return (IRR) of 198% and a payback period of just nine months. These figures are based on conservative assumptions including a long-term ammonium paratungstate (APT) price of US$1,000 per metric tonne unit (MTU) and an initial capital expenditure of A$274 million.
Strong Production Profile and Operating Metrics
The Watershed project boasts a 15-year life with an average annual production of approximately 2,500 tonnes of tungsten trioxide (WO3). The resource inventory stands at 69.7 million tonnes at 0.11% WO3, containing roughly 76,000 tonnes of WO3, mostly within the Indicated and Measured categories, which provides a solid foundation for mine planning. Mining leases and primary environmental approvals are already secured, clearing major regulatory hurdles.
Operating costs are projected at a competitive US$416 per MTU, supported by a low-risk conventional processing flowsheet that combines ore-sorting, gravity separation, and flotation. The company is targeting further optimisation to reduce operating expenses to around A$499 per MTU, enhancing project margins in the current high-price environment where APT prices exceed US$3,000 per MTU.
Funding Strategy Emphasises Non-Dilutive Sources
TGN is actively pursuing multiple non-dilutive funding pathways to support project development and reduce shareholder dilution. These include government grants and strategic funding aligned with critical minerals initiatives, offtake prepayments from major refiners and trading groups, and project debt options such as private credit and bond financing. The company has engaged financial advisers experienced in resource project funding and is in discussions with government-backed bodies and potential offtake partners.
Pre-production funding requirements are estimated at around A$274 million, with the company signalling no certainty yet on the final funding mix or terms. Alternative value realisation strategies, including joint ventures or asset sales, remain options to mitigate financial risk.
Pathway to Final Investment Decision and Production
The development timeline is well defined, with early works and long-lead equipment procurement underway. The company plans to complete a Definitive Feasibility Study (DFS) and secure final regulatory approvals by Q3 2026, paving the way for a FID in the same quarter. Construction is scheduled to commence shortly thereafter, targeting mining start in early 2027 and full production by mid-2027.
This timeline aligns with the company’s strategy to capitalise on current high tungsten prices and global supply constraints. Tungsten's strategic importance across aerospace, defence, electronics, and industrial sectors underpins the project's market relevance.
Risks and Forward-Looking Uncertainties
While the PEE study presents an attractive economic case, it is important to note that no Ore Reserves have yet been declared, with the company aiming to do so alongside the FID. The project’s success depends on securing the necessary funding on favourable terms, maintaining commodity price assumptions, and obtaining all remaining approvals. Geological, technical, and market risks remain, as do uncertainties around operating costs and capital expenditure.
Investors should consider these factors carefully as Tungsten Mining progresses toward critical milestones later this year.
Bottom Line?
Tungsten Mining’s Watershed project offers a strong economic proposition with a clear development pathway, but securing funding and final approvals will be pivotal in the coming months.
Questions in the middle?
- Will Tungsten Mining secure non-dilutive funding sufficient to meet the A$274 million capital requirement?
- How will evolving tungsten prices impact the project's financial metrics and timing of FID?
- Can the company convert its substantial Indicated and Measured resources into Ore Reserves ahead of production?