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    Ur-Energy’s Shirley Basin uranium start-up: ISR project metrics for mine planners

    April 29, 2026|

    Reviewed by Joe Ashwell

    Ur-Energy’s Shirley Basin uranium start-up: ISR project metrics for mine planners

    First reported on MINING.com

    30 Second Briefing

    Ur-Energy has begun in situ recovery uranium production from Mine Unit 1 at its Shirley Basin project in Wyoming, capturing uranium-bearing solution following completion of wellfield installation, processing circuits and permitting. The project has licensed annual wellfield and toll-processing capacity of up to 2.0 million lb U₃O₈ equivalent, with 9.1 million lb U₃O₈ in Measured and Indicated resources at an average 0.22% eU₃O₈ and an anticipated nine-year mine life across three shallow units. Uranium is loaded onto ion exchange resin on site and is expected to be trucked to the Lost Creek plant for final processing, drying and packaging from this summer, pending a further regulatory inspection.

    Technical Brief

    • Production circuits are being progressively brought online, so head grades in solution are expected to ramp up.
    • Resin-loading occurs at Shirley Basin, with uranium-loaded ion exchange resin trucked off site for finishing.
    • Final elution, precipitation, drying and packaging will be carried out at Ur-Energy’s Lost Creek plant.
    • Resin haulage to Lost Creek is targeted to commence in summer, pending one further regulatory inspection.
    • Shirley Basin is Ur-Energy’s second ISR operation, adding a separate wellfield complex to the Lost Creek asset.

    Our Take

    In our uranium coverage, Wyoming features both in new production stories like Ur-Energy’s Shirley Basin and in consolidation plays such as Myriad Uranium’s planned merger around Copper Mountain, signalling that the state is re-emerging as a structurally important US uranium district rather than just a legacy producer.

    The licensed 2 million pounds per year U₃O₈ wellfield and toll-processing capacity at Shirley Basin positions Ur-Energy as one of the larger potential domestic ISR suppliers in our database, which is strategically relevant as US-focused royalty and landholding vehicles like Uranium Royalty/Sweetwater build scale in the same national market.

    Metals Australia’s Baie-Comeau graphite refinery, with a planned cost of US$2.05 billion, shows that capital is flowing into both ends of the nuclear value chain in our keyword-matched pieces—uranium mining in Wyoming and battery/graphite processing in Canada—highlighting parallel build-outs in fuel and storage materials for low-carbon power systems.

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    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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