The Anatomy of a Turnaround: Fixing the Lungs and Veins of Beta Hunt

PERTH, Australia – October 20, 2026

In the realm of modern infrastructure, the term "legacy" is rarely a compliment. It usually denotes a system that has outlived its design parameters, a bottleneck waiting to choke progress. When Westgold Resources Limited acquired the Beta Hunt underground mine in August 2024, they did not just buy a high-quality gold orebody in Western Australia's Southern Goldfields; they inherited a sprawling, asthmatic labyrinth constrained by the very infrastructure meant to sustain it.

For years, previous operators had bumped against a hard ceiling. Despite the geological promise beneath Kambalda, historical mining rates stubbornly refused to exceed 1.4 million tonnes per annum (Mtpa). The structural integrity of the mine's support systems—its ventilation, dewatering, and power grids—was fundamentally compromised by age and underinvestment.

Today, that ceiling has been shattered. Following a forensic, two-year, $33.3 million capital overhaul, Westgold announced that Beta Hunt achieved a record annualized mining rate of 2Mtpa in September 2026. This is not merely a story of digging faster; it is a masterclass in industrial rehabilitation. By systematically diagnosing and replacing the failing arteries of the mine, Westgold has established a platform capable of sustaining this 2Mtpa output consistently from the second quarter of the 2027 financial year.

Breathing Room: The Cost of Air Underground

Deep underground, air is the ultimate currency. The mineralized system at Beta Hunt stretches across approximately seven kilometers of strike, with four kilometers currently developed. Pushing heavy machinery and personnel into these depths requires massive, reliable airflow. Historically, this was Beta Hunt's primary choke point.

Westgold’s initial strategy to solve this was a $10.3 million life-of-mine (LOM) primary fan station installed on the 801 level. Designed to push 500 cubic meters of air per second, it was meant to be the permanent lungs of the expanded operation. However, mining engineering is rarely without friction. The turn-key system suffered crippling bearing and coupling failures. Despite additional bracing installed in late FY26, the vendor's equipment simply could not deliver the required reliability, forcing Westgold to temporarily divert production to shallower, less optimal parts of the mine.

Rather than allowing a vendor dispute to derail their operational timeline, Westgold executed a rapid pivot. The company procured and installed an independent $7.4 million interim ventilation solution in the 801-level return airway. Commissioned ahead of schedule in late September 2026, this interim system provides sufficient airflow to support the 2Mtpa target for the next two years while the permanent LOM fans are repaired or replaced.

Westgold Managing Director and CEO Wayne Bramwell noted the scale of the intervention in the company's latest release: "Prior to acquisition Westgold identified that Beta Hunt needed investment in two areas to operationally derisk and enable growth of this large underground mine. Our team has now removed key operational constraints by replacing or upgrading key mine infrastructure and completed over 85km of diamond drilling in the last 2 years, adding +1.1Moz of reserve at approximately $27/oz."

Bramwell added that the completion of these engineering upgrades "now establishes Beta Hunt as a modern mining operation capable of sustaining 2Mtpa mining rates from Q2 FY27 onwards."

Clearing the Arteries: Power and Water

While air allows the mine to breathe, power and water dictate its pulse. At acquisition, Beta Hunt's legacy dewatering network was critically undersized, designed to handle approximately 12 liters per second against peak operational inflows closer to 50 liters per second. The result was predictable: localized flooding, road washouts, and submerged active mining areas that crippled productivity.

Westgold effectively performed a bypass on the mine's hydrological system. The company invested $6.2 million across primary and secondary dewatering upgrades, installing 7.6 kilometers of new pipework and expanding the network with over a dozen new high-capacity pumps. Simultaneously, they secured access to a nearby open pit to serve as a settling facility, deploying a twin-bore pontoon pumping system to return clean water underground. This $1.5 million water supply upgrade eliminated the equipment downtime previously caused by corrosive, poor-quality water degrading drill rigs and jumbos.

The electrical grid required a similar intervention. The legacy high-voltage supply was plagued by voltage drops. More alarmingly, the critical B6 Feeder cable—which supplied over half the mine's power and fed the primary ventilation system—was routed through a ventilation rise exposed to severe salt and environmental degradation. By drilling a new service hole and installing redundant underground power cables alongside a $5.0 million surface power upgrade, Westgold insulated the operation against catastrophic electrical failure.

The Processing Bottleneck: A Victim of Its Own Success

Fixing the mine, however, introduces a new structural tension: the processing bottleneck. By successfully elevating Beta Hunt's extraction rate to 2Mtpa, Westgold has outpaced its own milling infrastructure. The company's Higginsville processing plant, located roughly 80 kilometers south, has a maximum capacity of approximately 1.6Mtpa.

This 400,000-tonne annual mismatch is a strategic challenge born of operational success. To manage the overflow, Westgold has initiated a massive stockpiling strategy. In the September 2026 quarter alone, the company's ore stockpiles grew by 51 percent to nearly 700,000 tonnes.

"Stockpiling at this scale ties up significant working capital, but it is a necessary bridge," noted one Perth-based mining analyst familiar with the operation. "They are building a massive buffer on the surface. It de-risks the milling schedule against adverse weather or maintenance downtime, but more importantly, it forces the board's hand on the upcoming expansion decision."

The Road to Four Million Tonnes

The stockpiles accumulating under the Western Australian sun are the physical manifestation of Westgold's next major capital decision. The company is currently advancing a Definitive Feasibility Study (DFS) for an integrated Southern Goldfields expansion, expected to be completed in the third quarter of FY27.

The DFS is evaluating two distinct structural pathways to handle the surging output from Beta Hunt, particularly as the newly defined Fletcher Zone comes online. The 85 kilometers of diamond drilling completed over the past two years has profoundly changed the geological math, adding 1.1 million ounces of reserves and supporting a shift to highly productive transverse mining methods in the Western Flanks.

To process this bounty, Westgold must choose between expanding the existing Higginsville hub to treat 4Mtpa of Beta Hunt ore, or constructing an entirely new 4Mtpa processing facility closer to the Kambalda operation. A new facility would push Westgold's total Southern Goldfields milling capacity to an imposing 5.6Mtpa, fundamentally altering the regional processing landscape and offering immense optionality.

With seven drill rigs currently operating underground—six focused on converting reserves at Fletcher and one extending resources at the Mason prospect—the geological pressure is only increasing. Westgold has successfully repaired the structural integrity of Beta Hunt, transforming a constrained liability into a high-capacity engine. The question now shifts from whether they can dig it out of the ground, to how fast they can build the infrastructure to pour it into bars.