American Uranium Commences Key Hydrogeology Testing and Drilling at Lo Herma

Jane Morgan Management

Perth, Australia – American Uranium Ltd (ASX:AMU) is set to launch critical hydrogeologic testing and a major resource expansion drilling program at its flagship Lo Herma ISR Uranium Project, located in Wyoming’s Southern Powder River Basin.

Program Highlights

Hydrogeologic testing of monitor wells scheduled to commence in Q4 CY2025
Resource expansion and infill drilling to begin in Q4 CY2025
Results to underpin an updated Mineral Resource Estimate (MRE) in Q1 CY2026 and a revised Scoping Study later in the year

American Uranium CEO and Executive Director Bruce Lane said the dual programs represent significant progress for Lo Herma:

“Our upcoming resource expansion drilling and hydrogeology programs at Lo Herma represent major steps toward advancing one of America’s most promising ISR uranium projects. These programs will target both growth in the resource base and increased confidence in existing mineral resources along with further validation of the project’s hydrogeology. The program is targeting an increase of the current 8.57Mlbs (32% indicated) eU3O8 Mineral Resource Estimate by converting Exploration Target Range mineralisation for Lo Herma which currently stands at 5.6 to 7.1 million tonnes at a grade range of 500 ppm to 700 ppm eU3O8. This work is expected to feed into an updated Mineral Resource Estimate and Scoping Study in 2026 positioning us to deliver value from America’s nuclear energy revival.”

Hydrogeologic Testing

Building on earlier fieldwork, hydrogeologic testing will confirm Lo Herma’s aquifer conditions for efficient ISR mining. Step-drawdown pumping tests will assess sustainable pumping rates and refine wellfield planning. Longer-term testing, including additional monitor wells, will support future mine permitting.

Resource Development Drilling

With federal and state approvals secured, American Uranium plans to commence drilling at Lo Herma in Q4 CY2025. The program will target resource growth through step-out drilling north of proposed Mine Units 1 and 2, while infill drilling aims to upgrade Inferred Resources to higher confidence categories.

The combined programs are expected to expand on Lo Herma’s current 8.57Mlbs eU3O8 MRE and convert Exploration Target mineralisation, further strengthening its position as a near-term, low-cost domestic uranium source.

ENDS

About us:

About American Uranium
American Uranium Limited (ASX:AMU) is focused on defining and developing economic in-situ recovery (ISR) uranium resources as part of the U.S. domestic uranium mining revival. AMU’s flagship and most advanced Lo Herma Project leads the Company’s project portfolio and is strategically positioned in Wyoming’s Powder River Uranium Basin, the most significant uranium production district in the U.S.

Contact details:

Jane Morgan
Investor & Media Relations Manager
M: +61 405 555 618
[email protected]