Discovery to Production: How Americas Gold & Silver Is Converting New Veins into Near-Term Mining Fronts at Galena

• The 034 Vein and 149 Vein are adjacent to existing infrastructure and active production areas, giving both discoveries a materially shorter path from drill intercept to mining front.
• A third discovery, the 520 Vein at the Coeur Mine, is connected underground to the Galena Mine at the 3400 Level and sits directly in line with the recently upgraded Coeur Shaft.
• The shift from underhand cut and fill (UC&F) to long-hole stoping (LHS) has cut the stope extraction cycle from approximately one year to under one month, with nine panels mined to designed widths by end of 2025.
• Phase 2 shaft upgrades targeting approximately 105 short tons per hour by end of April 2026, combined with significant excess mill capacity, mean new ore can enter production without additional plant investment.
• Galena's Measured & Indicated silver resource grade rose 21% year-over-year to 500.9 grams per tonne, with management expecting high-grade vein additions to drive observable grade improvements in 2026 production metrics.

What Has Happened

Americas Gold & Silver Corporation (TSX: USA | NYSE American: USAS) has moved quickly in translating drill discoveries at its Galena Complex in Idaho's Silver Valley into tangible additions to its near-term mine plan. The company's recent resource and reserve update confirmed that two high-grade vein discoveries, the 034 Vein and the 149 Vein, are now directly integrated into active or planned mining sequences, with a third new discovery, the 520 Vein in the adjacent Coeur Mine, opening a further potential mining front. Underpinning this conversion is a coordinated shift in mining method, from conventional underhand cut-and-fill (UC&F) to long-hole stoping (LHS), alongside substantial infrastructure upgrades to hoisting capacity and underground equipment. The combined effect is a reduction in the stope extraction cycle from approximately one year to under one month, directly compressing the time required to convert a drill intercept into producing ore.

Underground Geometry: Why Proximity Matters

At Galena, converting a drill intercept into a mining front depends as much on location as it does on grade. The 034 Vein, drilled from the 5200 Level and situated between the Polaris and Argentine faults near the Galena Shaft, sits adjacent to existing infrastructure, with eight new splay veins defined from successive drill campaigns and a silver content estimate that grew from 1.2 to 1.5 million ounces in April 2025 to 6 to 7 million ounces by January 2026. The 149 Vein, drilled from the 4300 Level and extending to the 4900 Level, is mapped directly adjacent to the Active Production Area of the 49-149 Raise, removing the most time-consuming element of bringing a new mining front online: primary access development.

Executive Vice President (EVP) Corporate Development of Americas Gold & Silver, Oliver Turner, described the nature of these drill programs in characteristically direct terms:

"These are holes that are drilled from underground, right? These are much shorter holes that are adjacent and very close to the targets that we're drilling." 

This is the critical distinction for investors assessing conversion timelines. Underground definition drilling executed from existing levels toward adjacent targets is an extension of mine planning, not early-stage exploration. The resulting intercepts carry a shorter path to production than surface drilling, with underground definition drilling removing the need for primary access development.

The Coeur Mine: A New Front Opens

A third discovery, the 520 Vein at the Coeur Mine, adds a further dimension to the Galena Complex's near-term production optionality. Four drillholes have defined a mineralized vein measuring 150 metres long by 150 metres high, open in all directions, with highlight intercepts including 1.1 metres grading 619 grams per tonne silver, 1.01% copper, and 0.65% antimony. Critically, the Coeur Mine is connected underground to the Galena Mine at the 3400 Level and sits directly in line with the recently upgraded Coeur Shaft.

According to the Americas Gold & Silver resource and reserve update dated March 30, 2026, veins at Galena with established down-dip continuity indicate over 2,000 feet of untested potential below the existing Coeur Mine workings. 

Infrastructure Capacity: The Production Bottleneck Problem Addressed

At Galena, Phase 1 upgrades to the No. 3 Shaft increased the hoist motor to 2,250 horsepower, lifting skip loading capacity from approximately 40 short tons per hour to approximately 80 short tons per hour. Phase 2, targeting completion by the end of April 2026, is expected to bring total hoisting capacity to approximately 105 short tons per hour, an approximately 160% increase over 2024 levels. 

On the processing side, current mill throughput of 408 tonnes per day runs well below the combined processing capacity of approximately 1,558 tonnes per day across the Galena Mill and Coeur Mill. That gap means ore from newly converted mining fronts can move directly into production without requiring additional plant investment.

Turner framed the infrastructure logic in terms of its cost consequences:

"As we continue to expand our ounce profile by moving more tonnes more efficiently with the modern equipment we have, with the upgraded hoist motors and the shafts we have, with the improvements we're making to the mill, our cost per tonne obviously comes down due to economies of scale."

Long-Hole Stoping: Compressing the Cycle from Vein to Mill

The shift from UC&F to LHS is the most consequential operational change at Galena in the near term. Under UC&F, extracting a standard stope required approximately one year; the first LHS test stope, a panel measuring 120 by 60 feet, was mined to designed widths in under one month. By the end of 2025, nine LHS panels had been mined to designed widths, with three additional stopes in development for the First and Second Quarters of 2026, compared to no LHS stopes at the end of 2024. Remote mucking productivity reached approximately 200 tonnes per shift versus approximately 50 tonnes per shift under conventional methods, and more than 10 new pieces of mobile equipment, including long-hole drills, have been deployed underground, with a paste fill system under construction on surface to support scaled stoping operations.

Turner connected this methodological shift explicitly to the company's production scaling ambitions:

"The switch to long-hole stoping from underhand cut and fill, the upgrades we've done to the hoists, the addition of the new mining equipment that we've put into the underground mine as well, all of those are part of that plan which started off with the turnaround of the operation, but now that we've reached stabilisation, is how do we scale production from here."

A fibre-optic communications system is currently being installed through the No. 3 Shaft and across the 5500 Level. Remote operation of fans, pumps, and equipment will be enabled once the system is completed, targeted for completion in the Third Quarter of 2026. This matters for both productivity and the practical management of concurrent mining fronts at depth.

Grade Effects & the Mine Plan Logic

The framing used internally by the Americas team to assess the impact of new vein additions to the mine plan centres on what management called grade effects: the observable improvement in average mine head grade when high-grade areas are incorporated into scheduled production. At Galena, the Measured & Indicated (M&I) silver resource grade increased by 21% year-over-year to 500.9 grams per tonne, alongside a 19% increase in M&I ounces to 87.9 million ounces. The Proven & Probable (P&P) reserve grade increased by 21% to 482.1 grams per tonne, with P&P ounces increasing 2% to 16.3 million ounces.

Turner described the mechanism in practical terms:

"By drilling off these areas, like the 034 Vein, like the 149 Vein, and then incorporating that material into the mine plan, you start to see mine grades go up above resource grade or above the grade that was mined previously. That's where people start to factor in those grade effects."

The implication is that the Measured & Indicated resource update, while an important reserve-building step, is a lagging indicator of what management anticipates will be visible in production metrics. If high-grade intercepts from the 034 and 149 Veins are incorporated into scheduled mining in 2026, the grade effect should, in principle, manifest in reported head grades ahead of any further formal resource revision.

With Galena carrying an AISC of $38.20 per ounce sold in 2025, successful incorporation of the 034 and 149 Vein intercepts into the active mine plan would increase silver output from the same volume of rock moved, reducing cost per ounce without requiring additional throughput.

What to Watch Next

Production data will be the most immediate test of the conversion thesis. Americas Gold & Silver has guided 2026 consolidated silver output of 3.2 to 3.6 million ounces, representing approximately 30% growth over 2025. The company is targeting higher head grades at the Galena Complex through integration of the 034, 149, and potentially the 520 Veins into the active 2026 mining schedule.

Infrastructure delivery is equally critical. Phase 2 of the No. 3 Shaft upgrade is targeted for completion by the end of April 2026, increasing hoisting capacity to approximately 105 short tons per hour. Commissioning of the surface paste fill plant is also targeted for 2026 and is required to scale LHS to the targeted production levels. Any delays in these upgrades could limit the pace of conversion regardless of drilling progress.

Exploration results and technical disclosures will shape the next phase. The 2026 drill programme totals approximately 64,000 metres, with step-out drilling at the early-stage 520 Vein assessing its scale and role in future mining. A technical report covering the October 31, 2025 resource and reserve estimates is targeted for filing within 45 days of the March 30, 2026 release and will detail the cut-off grades, metal price assumptions, and modelling parameters underpinning each vein estimate. The Crescent Mine, located nine miles from Galena with a historical inferred resource of 19.1 million ounces at 665 grams per tonne, which has not yet been classified as a current Mineral Resource or Mineral Reserve, adds longer-term optionality supported by $30 to $40 million in planned 2026 growth capital.

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