An aerial view of a modern uranium in-situ recovery (ISR) wellfield in the Wyoming basin, featuring a network of injection and recovery wells connected by white piping across the arid landscape under a clear sky.
By Penny Langford
The landscape of American energy independence shifted significantly this week as Ur-Energy Inc. (URG) officially commenced uranium production at its historic Shirley Basin project in Wyoming. The restart marks the first time uranium has been extracted from the site since 1992, ending a 34-year hiatus and signaling a robust pivot toward domestic nuclear fuel security.
Located in the heart of Carbon County, approximately 40 miles south of Casper, the Shirley Basin district is often cited by geologists as the "birthplace" of in-situ recovery (ISR) mining. The return to operations here is more than a company milestone; it is a strategic response to a global uranium market that has seen spot prices climb above $100/lb and a U.S. policy environment that has newly designated uranium as a critical strategic asset.
The Return of a Wyoming Legend
The Shirley Basin project was previously operated by Pathfinder Mines until its closure in the early 1990s due to a prolonged period of depressed uranium prices. Ur-Energy acquired the asset in 2013, but the path to production required a decade of careful permitting, engineering, and market waiting.
In March 2024, the company made the final investment decision to build out the fully licensed project. After a 24-month construction and development cycle, Ur-Energy announced on April 23, 2026, that uranium-bearing solutions were once again flowing from Mine Unit 1.
The satellite processing plant at Shirley Basin utilizes modular design to efficiently capture uranium from the pregnant lixiviant solution using ion exchange technology.
Technical Precision: The ISR Advantage
Unlike traditional open-pit or underground mining, Shirley Basin utilizes in-situ recovery (ISR). This method involves circulating a "lixiviant": a mixture of native groundwater fortified with oxygen and carbon dioxide: through the ore-bearing sandstone. The solution dissolves the uranium, which is then pumped to the surface.
The current operation at Mine Unit 1 utilizes advanced ion exchange (IX) columns to extract uranium from the solution. The process is remarkably low-impact; there is no massive excavation, no tailings piles, and the groundwater is continuously monitored and eventually restored.
One of the key operational efficiencies for Ur-Energy is the logistics chain between Shirley Basin and its flagship Lost Creek facility.
- Initial Capture: Uranium is captured on resin beads at the Shirley Basin satellite plant.
- Transportation: These uranium-loaded resins are then transported via specialized trailers to the Lost Creek processing plant.
- Final Stage: At Lost Creek, the uranium is stripped from the resin, dried, and packaged into "yellowcake" (U3O8) for shipment to converters.
This "hub-and-spoke" model allows Ur-Energy to leverage its existing infrastructure, significantly reducing the capital expenditure required to bring Shirley Basin online.
Capacity and Scale
The licensed annual capacity for Shirley Basin is set at 2.0 million pounds of U3O8 equivalent. When combined with the Lost Creek facility, Ur-Energy’s total licensed production and toll processing capacity now reaches 4.2 million pounds per year.
The resource base remains substantial despite its long history. Measured and indicated mineral resources at the site are estimated at approximately 9.1 million pounds of U3O8, with an average grade of 0.22%. Based on current mine plans, Ur-Energy anticipates a nine-year mine life across three shallow mining units, though exploration potential remains in the periphery of the known deposits.
Engineering and geology teams at Shirley Basin use real-time digital monitoring to track wellfield conditioning and uranium concentrations.
The Macro Driver: AI, Data Centers, and Section 232
The timing of the Shirley Basin restart is no coincidence. The uranium market in 2026 has been reshaped by two primary forces: the explosive growth of energy-intensive computing and a fundamental shift in U.S. trade policy.
The AI Power Hunger
As detailed in our recent analysis on the top 10 mining CEOs leading the AI energy transition, the surge in data center development for artificial intelligence has placed a premium on carbon-free, baseload power. Nuclear energy is the only technology capable of providing the 24/7 reliability required by the tech giants. Tech companies are increasingly looking to secure long-term power purchase agreements (PPAs) with nuclear utilities, who in turn must secure a stable, domestic supply of fuel.
Strategic Protectionism
In January 2026, the U.S. government issued a Section 232 proclamation, elevating uranium to a strategic asset. This move concluded that reliance on foreign imports: particularly from Russia and increasingly volatile regions: threatens national security. The policy framework is expected to establish price floors and incentive structures that favor domestic producers like Ur-Energy.
"The restart of Shirley Basin is a testament to the resilience of the Wyoming mining sector," says one local industry analyst. "We are seeing a convergence of high prices, technological demand, and political will that we haven't seen since the late 1970s."
Wyoming’s Nuclear Future
Wyoming remains the top producer of uranium in the United States, and the state’s regulatory environment has been a critical factor in the speed of the Shirley Basin restart. The state took over "Agreement State" status from the Nuclear Regulatory Commission (NRC) years ago, allowing for more localized and efficient permitting through the Wyoming Department of Environmental Quality.
The economic impact on Carbon County is significant. The 24-month build-out supported hundreds of construction jobs, and the operational phase provides high-paying technical roles for the 2026 mining workforce.
A heavy-duty transport truck carrying uranium-loaded resin leaves the Shirley Basin site, destined for final processing at the Lost Creek facility.
2026 Outlook: A Bullish Case for Domestic Uranium
As Ur-Energy ramps up production, the broader industry is watching closely. The "wellfield conditioning" phase is currently underway at Shirley Basin, with uranium concentrations expected to increase as the production circuits reach full equilibrium this summer.
The company is entering a market where supply remains tight. Kazakhstan, the world's largest producer, continues to face logistical and chemical supply constraints (specifically sulfuric acid shortages), while new mine development globally has been slow to keep pace with the 28% demand increase projected by the end of the decade.
For investors and industry professionals, the Shirley Basin restart serves as a bellwether for the 2026 uranium price forecast. While volatility is always a factor in commodity markets, the structural demand from the "Next-Gen" tech sector and the strategic shift toward domestic sourcing suggest that the hiatus at Shirley Basin is truly a thing of the past.
Final Thoughts
The return of the Shirley Basin mine is a symbolic and literal restoration of U.S. mining heritage. It proves that with the right technology (ISR) and a favorable macro-economic climate, "exhausted" districts can find a second life. As the first resins begin their journey to Lost Creek this summer, Ur-Energy stands at the forefront of a Wyoming-led uranium renaissance.
Shareable Social Media Snippet (LinkedIn/X)
Headline: Historic Restart: Ur-Energy Brings Shirley Basin Uranium Mine Back Online After 34 Years.
The Lead: Uranium is flowing again in Wyoming’s Shirley Basin. Ur-Energy (URG) has officially restarted production at the historic site, leveraging ISR technology and the flagship Lost Creek processing hub. With uranium prices holding above $100/lb and AI data centers demanding carbon-free baseload power, the U.S. domestic uranium renaissance is no longer a forecast; it’s operational reality. #Uranium #MiningNews #EnergySecurity #WyomingMining #UrEnergy #SkillingsMining
| Metric | Shirley Basin (2026) |
|---|---|
| Mining Method | In-Situ Recovery (ISR) |
| Annual Licensed Capacity | 2.0 Million lbs U3O8 |
| Combined URG Capacity | 4.2 Million lbs U3O8 |
| Est. Mine Life | 9 Years |
| Measured & Indicated Resources | 9.1 Million lbs @ 0.22% eU3O8 |
| Final Processing Site | Lost Creek, WY |
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