Stanmore Resources Limited

Stanmore Resources Limited (ASX: SMR) is an Australian-listed company headquartered in Brisbane. It is majority controlled by Golden Energy and Resources (GEAR) and Ascend Global Investment Fund, which collectively hold approximately 75% of issued equity following the BHP Mitsui Coal (BMC) acquisition in 2022. The remaining shares are publicly traded.

The operating subsidiaries—Stanmore SMC Pty Ltd (formerly BMC) and Stanmore IP Coal Pty Ltd—wholly own and manage the group’s key producing assets: South Walker Creek, Poitrel, and the Isaac Plains Complex. All production and marketing activities are consolidated under Stanmore Resources Ltd.

Stanmore’s strategy centers on consolidating and expanding its position as a leading mid-tier metallurgical coal producer in Queensland’s Bowen Basin. Following the 2022 acquisition of BHP Mitsui Coal’s portfolio, Stanmore now controls a suite of high-quality assets with long reserve life and direct exposure to both premium PCI and semi-soft coking coal markets.

Key Facts

Operator: Stanmore Resources Ltd (ASX: SMR)
Type: Surface metallurgical coal mines
Products: PCI, semi-soft coking coal, minor thermal output
Status: Operating and expanding
Location: Bowen Basin, Queensland, Australia
2025 Saleable production guidance: 13.8–14.2 Mt
Primary transport/port: Hay Point and Dalrymple Bay

The company’s operational performance has rebounded sharply after the wet-weather disruptions of early 2025, with South Walker Creek achieving record output and Poitrel returning to full capacity. The main constraint remains at the Isaac Plains Complex, where CHPP capacity limits throughput until the Isaac Downs development fully replaces feed from the depleting satellite pit.

Queensland’s progressive royalty regime continues to pressure margins, particularly at higher price levels, though Stanmore’s low-cost PCI base provides a natural hedge against volatility. Meanwhile, the Eagle Downs and Isaac Downs Extension projects represent the next growth phase, extending mine life and diversifying the company’s metallurgical-coal quality mix. With free cash flow strengthening and leverage declining, Stanmore is positioned to sustain production around 14 Mtpa and remain one of the most balanced suppliers in the seaborne met-coal market.

Mines

Stanmore operates three active open-cut mines:

1) South Walker Creek,

2) Poitrel, and 

3) the Isaac Plains Complex.

The company’s product mix is weighted toward low-volatile PCI coal from South Walker Creek and semi-soft coking coal from Poitrel and Isaac Plains, giving it diversified exposure to the full metallurgical-coal spectrum. Total saleable output averages around 14 Mtpa, primarily exported to Asian steelmakers through the Hay Point and Dalrymple Bay coal terminals.

Stanmore’s operations are characterized by moderate strip ratios, efficient truck-and-shovel fleets, and modern coal handling and preparation plants. Its low-cost structure (FOB cash cost US$85–90/t) underpins competitive margins even at mid-cycle prices, while new projects are designed to maintain production continuity beyond 2035.

South Walker Creek

Located 35 km southwest of Nebo in the northern Bowen Basin, South Walker Creek is a large open-cut mine producing low-volatile PCI coal with low ash and sulphur. Mining occurs across multiple pits using truck, excavator, and dragline fleets. ROM coal is processed through a dense-medium CHPP that has operated above its upgraded nameplate capacity since 2023.

Coal is railed 140 km via the Blackwater rail system to Hay Point Terminal. Current output averages 2.5 Mt ROM and 1.8 Mt saleable per quarter, equivalent to 6.5–6.7 Mtpa. The mine benefits from a low strip ratio and stable yields, ensuring a strong cost position among global PCI suppliers.

Poitrel

Poitrel, situated south of Moranbah, produces both semi-soft coking coal (SSCC) and PCI coal from the Leichhardt and Vermont seams within the Rangal Coal Measures. The mine is a conventional truck-and-shovel strip operation with two fleets. Coal is processed at the Red Mountain CHPP, shared under the former Red Mountain Joint Venture.

The operation averages 1.9 Mt ROM and 1.2 Mt saleable per quarter, targeting 4.9–5.0 Mtpa for FY25. Poitrel’s output is transported by rail 160 km to the Dalrymple Bay Coal Terminal, and its flexible product blending allows the company to optimize output across market cycles.

Isaac Plains Complex

Located northeast of Moranbah, the Isaac Plains Complex includes the Isaac Plains open-cut mine, the Isaac Downs satellite pit, and a shared CHPP that handles all feed. The site produces predominantly semi-soft coking coal and small quantities of thermal coal.

After wet-season disruption in early 2025, production stabilized at 1 Mt ROM and 0.6 Mt saleable per quarter. CHPP throughput remains the limiting factor, with annual saleable production expected at 2.4–2.5 Mt.

The company also has a pipeline of growth projects including Isaac Downs, Eagle Downs, Lancewood, and Isaac Plains Underground.

Isaac Downs and Isaac Downs Extension

Isaac Downs, approved in 2021 and commissioned in 2023, provides replacement feed for the Isaac Plains CHPP, sustaining output as older pits close. The project targets 2–2.5 Mtpa of ROM coal from shallow, low-strip ratio seams. The Isaac Downs Extension, now advancing through environmental approvals, will add further longevity. Fieldwork and seismic programs are complete, and an Environmental Impact Statement is planned for early 2026.

Eagle Downs

The Eagle Downs project, southwest of Moranbah, is a planned underground operation targeting high-quality hard coking coal. Mine design and infrastructure optimization are well advanced, with the project envisaged as a long-term growth platform that could elevate Stanmore’s exposure to the premium coking-coal segment.

Lancewood and Isaac Plains Underground

Lancewood remains in early exploration, with 3D seismic acquisition underway. The Isaac Plains Underground project, adjacent to the existing open cut, is under concept study as a potential late-life transition project.

All Stanmore operations are linked via the Blackwater rail system to export terminals at Hay Point and Dalrymple Bay. The company maintains modern rail loadout facilities, water-storage dams, and on-site CHPPs designed for dense-medium cyclone washing. Water supply is drawn primarily from rainfall capture and pit dewatering, supplemented by licensed surface-water sources.

Stanmore markets a portfolio that is approximately 70% PCI, 24% semi-soft coking coal, and 6% thermal coal.

• South Walker Creek: Low-volatile PCI (ash ~9%, VM ~13%, TS <0.4%).
• Poitrel: Semi-soft coking and PCI blend (ash 8–9%, VM 22–24%, CSN 6–7).
• Isaac Plains: Semi-soft coking coal with a minor thermal fraction blended for export.

Products are sold primarily into Asian steel markets—notably Japan, South Korea, India, and Southeast Asia—and benchmarked against Platts LV PCI and SSCC FOB Australia indices. 

Stanmore’s low-strip, low-cost operations and diversified product base underpin resilience across price cycles. The company’s near-term focus is on maximizing utilization of the Isaac Plains CHPP while preparing for the transition to Isaac Downs feed. Medium-term growth will depend on the timing and economics of Eagle Downs.

The company remains well positioned to sustain output near 14 Mtpa, maintain positive free cash flow, and advance its next generation of Bowen Basin projects.