Myriad’s Wyoming uranium district build-out: scale and drilling lens for mine planners
Reviewed by Joe Ashwell

First reported on MINING.com
30 Second Briefing
Myriad Uranium’s planned all-share merger with Rush Rare Metals will consolidate control of Wyoming’s Copper Mountain district for the first time since Union Pacific’s 1970s exploration campaign, which totalled the equivalent of C$117 million in today’s dollars. A new technical report compiles historical drilling indicating 16.5–26.7 million lb. U₃O₈ across seven deposits plus Department of Energy/Bendix estimates of 245–655 million lb. in broader “control and assessment” areas, of which Myriad holds 80% and 62% respectively. A 4,500-metre stage-two drill programme in 2024–2025 aims to validate these non-compliant resources and test indications that historical grades were understated.
Technical Brief
- Arrowhead mine at Copper Mountain historically produced about 500,000 lb U₃O₈ since the 1950s.
- Copper Mountain lies ~270 km west of Cheyenne, positioning it within established Wyoming uranium infrastructure.
- Union Pacific’s 1970s exploration in the district equates to about C$117 million in 2024 dollars.
- Department of Energy/Bendix drilling campaigns spanned roughly 1976–1982, underpinning the large “control/assessment” tonnage estimates.
- Myriad currently trades around C$0.51 per share, implying a market capitalisation near C$55.1 million.
- Stage-two drilling follows a maiden programme that management states “surpassed expectations by a significant margin”.
- CEO commentary frames Copper Mountain as “world-class” with “remarkable district-scale potential”, guiding internal exploration conviction.
- Sector context includes new Athabasca Basin mine start-ups and major long-term supply deals by Cameco and Kazatomprom.
Our Take
Myriad Uranium’s push at Copper Mountain in Wyoming follows its sale of the Red Basin uranium project in New Mexico (March 2026 piece), signalling a deliberate pivot to concentrate capital and management bandwidth on a single emerging US uranium district rather than a scattered portfolio.
The historical DOE/Bendix resource range at Copper Mountain, combined with Myriad’s 62–80% ground control, positions the company among the more scale-exposed US uranium names in our database, which may help it compete for future Department of Energy or utility offtake discussions alongside incumbents like Cameco and Kazatomprom mentioned in this piece.
Earlier coverage in March 2026 noted Myriad doubling the Copper Mountain land package after new geophysics, so the current consolidation of Rush Rare Metals’ remaining 25% interest is likely about locking up district-scale control ahead of any step-change in drilling spend or JV talks.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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