American Uranium, an Australian uranium company, reported in early October 2025 that the company has commenced resource development drilling at its flagship Lo Herma ISR Project in Wyoming’s Powder River Basin, targeting expansion and upgrading of the existing 8.57Mlb uranium resource.
DRILL RIG IN OPERATION AT LO HERMA ISR URANIUM PROJECT, SOUTHERN
POWDER RIVER BASIN, WYOMING
Highlights:
- ● Phase 1 of a two-phase resource development drilling campaign has now commenced at the Lo Herma ISR Uranium Project.
- ● The Phase 1 resource expansion program, started this week, aims to grow the current 8.57Mlb resource base prior to an interim Mineral Resource Estimate (“MRE”) update in early 2026.
- ● Phase 2 infill drilling is planned for Q1 2026 to increase confidence and upgrade Mineral Resource categories ahead of a planned Scoping Study update in Q2 2026.
- ● Drilling permit allows for up to 121 holes (~37,500m), targeting both Phase 1 resource growth and Phase 2 classification upgrades across the proposed Mine Units 1 and 2.
American Uranium Limited is pleased to announce that Phase 1 drilling has now commenced at the Lo Herma ISR uranium project in Wyoming’s Powder River Basin. AMU CEO and Executive Director Bruce Lane commented:
“We are delighted to have now commenced Phase 1 of the resource development drilling campaign at Lo Herma. We’re excited to be in a strong position to be able to complete this first phase of resource expansion drilling this quarter, with an interim mineral resource estimate update expected in early 2026.
“This program marks an important step towards advancing one of America’s most promising near-term, low-cost ISR uranium projects. Lo Herma is one of the few new near-term, low-cost ISR projects in the U.S. and the drilling campaign will target both growth in the current 8.57Mlb resource base and increased confidence in Mineral Resources.
“This work is expected to feed into a further resource upgrade and updated Scoping Study in the first half of 2026 to demonstrate Lo Herma’s potential to deliver similar economic potential to ISR uranium mines currently being planned or constructed in Wyoming such as Ur-Energy’s Shirley Basin project.”
Lo Herma Resource Development Drilling
As previously advised on 18 September 2025, AMU’s drilling permit is for up to 121 drill hole locations and up to 37,500 metres (approximately 123,000 feet) of drilling.
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The program will be completed in two phases:
- • Phase 1: ~50 holes for ~15,000 metres (50,000 feet) will focus on step-out drilling to expand the resource base by targeting known mineralised rollfronts in areas predominantly to the north of both proposed Mine Units 1 (“MU1”) and Mine Units (“MU2”).
- • Phase 2: ~71 holes for ~22,500 metres (~73,000 feet) is scheduled for early 2026 targeting an increase of the current proportion (32%) of Indicated or Measured category within the planned MU1 and MU2, thereby increasing resource confidence.
This release was authorized by the Directors of American Uranium Ltd. Jane Morgan, Investor and Media Relations Manager jm@janemorganmanagement.com.au
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