Lahontan Gold Targets 1980s Waste to De-Risk Nevada Mine Restart

TORONTO, ON – November 09, 2026 — In the high-stakes arena of mineral development, one era's discarded rock is another's foundational asset. Lahontan Gold Corp. has unveiled an ambitious plan to drill test the historic Santa Fe East Waste Rock Storage Facility (WRSF) at its flagship Santa Fe Mine Project in Nevada’s Walker Lane. The initiative, comprising up to 100 reverse-circulation (RC) drill holes averaging 35 metres in depth, targets approximately 9.0 million tonnes of waste rock excavated during the mine's original operational run between 1988 and 1992.

At first glance, drilling a 30-year-old waste dump might seem like an exercise in scraping the barrel. However, a closer examination of the project's underlying economics and the shifting paradigms of modern metallurgy reveals a calculated strategy to de-risk the mine's impending restart. With a targeted return to production in 2027, Lahontan is attempting to turn a legacy liability into a low-cost catalyst for early cash flow, building a more resilient operational model in the process.

Found Money: The Zero-Stripping-Cost Advantage

During the Santa Fe Mine's historic open-pit operations, which yielded over 359,000 ounces of gold and 700,000 ounces of silver, the mining cut-off grade hovered around 0.55 grams per tonne (g/t) of gold. Material falling below that threshold was unceremoniously trucked to the East WRSF. Today, the economic calculus has shifted dramatically. Lahontan’s current mineral resources are reported using a cut-off grade of just 0.10 g/t gold equivalent for oxide and transition resources.

This drastic reduction in the cut-off grade means that millions of tonnes of previously classified "waste" could now be economically viable for heap leach processing. More importantly, the October 2026 Preliminary Economic Assessment (PEA) mine schedule already dictates that the East WRSF must be moved to access the underlying Santa Fe gold and silver resources.

Kimberly Ann, Founder, Chair, CEO, and President of Lahontan Gold Corp., highlighted this synergy in the company's announcement. “Since this material is scheduled to be moved as part of the mining operation, evaluating its potential for heap leach processing represents an opportunity to potentially generate additional value from material that would otherwise be handled as waste,” she stated. “We believe this is an important opportunity to further optimize the Santa Fe Mine development plan and potentially enhance the project's overall economics.”

By repurposing pre-stripped waste material as early heap-leach feed, the company effectively eliminates the incremental stripping costs typically associated with accessing new ore. If the RC drill program confirms sufficient grade and tonnage, this "found money" could significantly improve the project's initial capital payback period.

However, processing historic waste is not without its technical hurdles. The viability of leaching 30-year-old dumps depends heavily on the material's current oxidation state, clay content, and compaction levels, all of which dictate percolation rates and ultimate gold extraction. Recent metallurgical reviews by Kappes, Cassiday and Associates indicated weighted project-wide gold recoveries of 74.4% from oxide mineralization. Yet, as one independent metallurgical consultant familiar with Nevada heap-leach operations noted, "Legacy dumps are notoriously heterogeneous. You can have highly oxidized, easily leachable zones sitting right next to compacted, clay-heavy material that blinds the leach pad. The drill program is essential not just for grade control, but for understanding the physical mechanics of how this rock will behave under solution."

Testing the Margins: Aggressive Economics in a Volatile Market

The push to identify low-cost, early-stage ore is particularly critical when contextualized against the economic assumptions underpinning Lahontan's recent PEA. The October 2026 assessment projects an 11-year mine life averaging 91,900 gold-equivalent ounces annually, boasting a post-tax net present value (NPV5) of US$820.0 million and an internal rate of return (IRR) of 40.1%.

While these headline numbers are robust, they are anchored by highly aggressive base-case metal prices: US$3,600 per ounce for gold and US$49 per ounce for silver. Furthermore, the estimated life-of-mine all-in sustaining costs (AISC) sit at a relatively high US$2,250 per ounce.

When compared to consensus long-term commodity price forecasts from major investment banks—which frequently model gold between US$1,800 and US$2,200 per ounce—the Santa Fe project's economics appear highly sensitive to market corrections. In a scenario where gold prices normalize toward historical averages, an AISC of US$2,250 per ounce leaves a razor-thin margin for operational missteps.

This is where the East WRSF transitions from a mere optimization opportunity to a vital strategic buffer. Junior mining companies developing brownfield sites often face intense scrutiny over their cost structures. By securing a source of zero-stripping-cost feed for the initial years of operation, Lahontan can artificially lower its early-stage AISC, accelerating the payback of its estimated US$172.0 million pre-production capital costs.

"When your base-case economic model relies on gold prices staying above three thousand dollars, you need every operational efficiency you can find to protect the downside," observed a Toronto-based mining risk analyst. "Converting waste to ore without incurring drilling and blasting costs is one of the few ways a developer can meaningfully insulate their margins against commodity price volatility."

The Nevada Brownfield Playbook

Lahontan’s strategy at Santa Fe is emblematic of a broader resurgence across Nevada’s prolific Walker Lane trend. As the discovery of tier-one greenfield deposits becomes increasingly rare and expensive, developers are pivoting back to past-producing open-pit operations. These brownfield sites offer distinct advantages: existing infrastructure, historical metallurgical data, and a known geological framework.

However, fast-tracking a past producer is not simply a matter of turning the lights back on. The regulatory environment in Nevada, governed jointly by the Nevada Division of Environmental Protection (NDEP) and the Bureau of Land Management (BLM), requires rigorous environmental baseline assessments. Moving and processing legacy waste rock introduces specific permitting considerations, particularly regarding acid-rock drainage and dust mitigation.

Because the East WRSF is already slated for relocation under the current mine plan, some of the environmental impact assessments regarding its disturbance are likely integrated into the broader permitting process. Lahontan is currently advancing these state and federal permitting activities, targeting completion in time for a 2027 construction launch.

The company has also been aggressively consolidating its position in the region. A recent acquisition of Emergent Metals Corp. granted Lahontan full ownership of the satellite West Santa Fe project, eliminating future royalty burdens and expanding its operational footprint. With exploration drilling continuing at West Santa Fe and a maiden resource estimate targeted for early 2027, the company is building a regional hub-and-spoke model centered around the Santa Fe processing infrastructure.

Ultimately, the 100-hole drill program at the East WRSF is more than a geological curiosity; it is a stress test of Lahontan Gold's broader development thesis. In an era where capital is expensive and commodity markets are unpredictable, the ability to extract value from the literal scrap heap of the 1980s may well be the defining factor in whether the Santa Fe Mine successfully transitions from a historic footnote back into a profitable producer.