Lo Herma Drilling Targets 6,900m to Expand 8.57Mlb Uranium Resource
American Uranium has launched its 2026 drilling campaign at the Lo Herma ISR uranium project in Wyoming, aiming to expand and upgrade its mineral resource ahead of key updates this year.
- 2026 drilling program commenced at Lo Herma ISR uranium project
- Up to 15 drill holes planned targeting resource growth north of Mine Unit 2
- Interim Mineral Resource update expected by end of Q1 2026
- Follow-up infill drilling scheduled for Q2 to support resource upgrade
- Updated Scoping Study planned for Q3 2026 to assess project economics
Drilling Resumes at Lo Herma
American Uranium Limited (ASX, AMU) has officially commenced its 2026 resource development drilling program at the Lo Herma in-situ recovery (ISR) uranium project, located in Wyoming’s prolific Powder River Basin. This marks a continuation of the company’s efforts to expand and upgrade the project’s mineral resource following a successful 2025 campaign that extended known mineralisation by over 3 kilometres along trend.
The current phase involves up to 15 drill holes, covering approximately 6,900 metres, with a focus on step-out drilling north of the proposed Mine Unit 2. The objective is to grow the resource base further and improve geological confidence ahead of an interim Mineral Resource Estimate update expected by the end of March 2026.
Strategic Resource Expansion and Confidence Building
CEO Bruce Lane emphasised the importance of this drilling phase, noting that it builds on last year’s positive results which confirmed significant mineralised extensions. The program is designed not only to increase the scale of the resource but also to enhance the confidence in its geological continuity, a critical factor for advancing the project towards development.
Following this initial drilling, American Uranium plans a more extensive infill drilling campaign in the second quarter of 2026, comprising around 56 holes over 16,000 metres. This phase aims to convert Inferred Resources into higher confidence Indicated or Measured categories, which are essential for detailed mine planning and feasibility assessments.
Looking Ahead to Scoping Study and Development Potential
The resource upgrades will feed into an updated Scoping Study scheduled for release in the third quarter of 2026. This study will evaluate Lo Herma’s potential to deliver economic outcomes comparable to other ISR uranium projects in Wyoming, which are known for their relatively low-cost production profiles.
Lo Herma stands out as one of the few near-term ISR uranium projects in the United States, positioning American Uranium to capitalise on growing demand for nuclear fuel amid a global energy transition. The company holds an active drilling permit allowing for up to 121 drill locations and 37,500 metres of drilling, underscoring its commitment to advancing the project methodically.
While no new resource figures have been released yet, the previous Mineral Resource Estimate from December 2024 reported an 8.57 million pound uranium resource, split between Indicated and Inferred categories. Investors will be watching closely for the upcoming updates to gauge the project's trajectory and potential value uplift.
Bottom Line?
As drilling progresses, all eyes will be on the forthcoming resource updates and scoping study to validate Lo Herma’s development promise.
Questions in the middle?
- How significant will the resource expansion be from the current drilling phase?
- What economic assumptions will underpin the updated Scoping Study in Q3 2026?
- How quickly can American Uranium transition Lo Herma from resource development to production?
