American Rare Earths Advances Permitting at Cowboy State Mine
American Rare Earths (AMRRY) has achieved a significant milestone in its permitting process for the Cowboy State Mine project by successfully installing 10 groundwater monitoring wells. The wells, part of the Halleck Creek Rare Earths Project in Wyoming, will collect baseline environmental and hydrological data over a 12-month period to support the state mining permit application with the Wyoming Department of Environmental Quality (WDEQ).
The project, located on State-managed land, benefits from a streamlined permitting process compared to Federal lands. The company plans to conduct 24-hour pump testing to measure water flow and assess mine dewatering requirements. The Pre-Feasibility Study (PFS) remains on track for completion in late 2025, with first production targeted for 2029. The project is supported by a substantial 2.63 billion tonne JORC Resource, positioning it as one of the largest rare earth projects in the United States.
American Rare Earths (AMRRY) ha raggiunto un traguardo importante nel processo di autorizzazione per il progetto Cowboy State Mine, installando con successo 10 pozzi di monitoraggio delle acque sotterranee. I pozzi, parte del progetto Halleck Creek Rare Earths nel Wyoming, raccoglieranno dati ambientali e idrologici di base per un periodo di 12 mesi a supporto della domanda di permesso minerario statale presso il Wyoming Department of Environmental Quality (WDEQ).
Il progetto, situato su terreni gestiti dallo Stato, beneficia di un processo di autorizzazione più snello rispetto ai terreni federali. L'azienda prevede di effettuare test di pompaggio continuativi di 24 ore per misurare il flusso d'acqua e valutare le esigenze di drenaggio della miniera. Lo Studio di Prefattibilità (PFS) è previsto in completamento entro la fine del 2025, con la prima produzione programmata per il 2029. Il progetto è supportato da una consistente risorsa JORC di 2,63 miliardi di tonnellate, che lo posiziona tra i più grandi progetti di terre rare negli Stati Uniti.
American Rare Earths (AMRRY) ha alcanzado un hito importante en su proceso de permisos para el proyecto Cowboy State Mine al instalar con éxito 10 pozos de monitoreo de aguas subterráneas. Los pozos, parte del proyecto Halleck Creek Rare Earths en Wyoming, recopilarán datos ambientales e hidrológicos base durante un período de 12 meses para apoyar la solicitud de permiso minero estatal ante el Wyoming Department of Environmental Quality (WDEQ).
El proyecto, ubicado en tierras gestionadas por el Estado, se beneficia de un proceso de permisos más ágil en comparación con tierras federales. La empresa planea realizar pruebas de bombeo de 24 horas para medir el flujo de agua y evaluar los requisitos de desagüe de la mina. El Estudio de Prefactibilidad (PFS) sigue en camino para completarse a finales de 2025, con la primera producción prevista para 2029. El proyecto cuenta con un sustancial recurso JORC de 2.63 mil millones de toneladas, posicionándolo como uno de los proyectos de tierras raras más grandes en Estados Unidos.
American Rare Earths (AMRRY)는 Cowboy State Mine 프로젝트의 허가 절차에서 중요한 이정표를 달성하여 10개의 지하수 모니터링 우물을 성공적으로 설치했습니다. 이 우물들은 와이오밍의 Halleck Creek Rare Earths 프로젝트의 일부로, 12개월 동안 기초 환경 및 수문학 데이터를 수집하여 와이오밍 환경 품질부(WDEQ)에 제출할 주 광산 허가 신청을 지원할 예정입니다.
이 프로젝트는 주 관리 토지에 위치해 있어 연방 토지에 비해 간소화된 허가 절차의 혜택을 받고 있습니다. 회사는 24시간 펌프 테스트를 실시하여 수량을 측정하고 광산 배수 요구사항을 평가할 계획입니다. 예비 타당성 조사(PFS)는 2025년 말 완료를 목표로 순조롭게 진행 중이며, 첫 생산은 2029년을 목표로 하고 있습니다. 이 프로젝트는 26억 3천만 톤 규모의 JORC 자원을 기반으로 미국 내 최대 희토류 프로젝트 중 하나로 자리매김하고 있습니다.
American Rare Earths (AMRRY) a franchi une étape importante dans son processus d'autorisation pour le projet Cowboy State Mine en installant avec succès 10 puits de surveillance des eaux souterraines. Ces puits, faisant partie du projet Halleck Creek Rare Earths dans le Wyoming, collecteront des données environnementales et hydrologiques de référence sur une période de 12 mois afin de soutenir la demande de permis minier étatique auprès du Wyoming Department of Environmental Quality (WDEQ).
Le projet, situé sur des terres gérées par l'État, bénéficie d'un processus d'autorisation simplifié par rapport aux terres fédérales. La société prévoit de réaliser des tests de pompage de 24 heures pour mesurer le débit d'eau et évaluer les besoins en drainage de la mine. L'étude de préfaisabilité (PFS) est en bonne voie pour être achevée fin 2025, avec une première production prévue pour 2029. Le projet est soutenu par une importante ressource JORC de 2,63 milliards de tonnes, ce qui en fait l'un des plus grands projets de terres rares aux États-Unis.
American Rare Earths (AMRRY) hat einen bedeutenden Meilenstein im Genehmigungsverfahren für das Cowboy State Mine-Projekt erreicht, indem erfolgreich 10 Grundwasserüberwachungsbohrungen installiert wurden. Die Brunnen, Teil des Halleck Creek Rare Earths Projekts in Wyoming, werden über einen Zeitraum von 12 Monaten Basisumwelt- und hydrologische Daten sammeln, um den Antrag auf eine staatliche Bergbaugenehmigung beim Wyoming Department of Environmental Quality (WDEQ) zu unterstützen.
Das Projekt befindet sich auf staatlich verwaltetem Land und profitiert von einem vereinfachten Genehmigungsverfahren im Vergleich zu Bundesland. Das Unternehmen plant, 24-Stunden-Pumpentests durchzuführen, um den Wasserfluss zu messen und die Anforderungen an die Grubenentwässerung zu bewerten. Die Vorstudie (PFS) soll planmäßig Ende 2025 abgeschlossen werden, mit einer Zielproduktion ab 2029. Das Projekt stützt sich auf eine umfangreiche JORC-Ressource von 2,63 Milliarden Tonnen und zählt damit zu den größten Seltene-Erden-Projekten in den Vereinigten Staaten.
- Project benefits from simplified permitting on State land vs Federal land
- Substantial resource base of 2.63 billion tonnes JORC
- Clear timeline with PFS completion by late 2025 and production target by 2029
- Strategic significance for U.S. critical minerals supply chain
- 12-month waiting period required for groundwater monitoring data collection
- Project still in early permitting phase with several steps remaining
Completion of groundwater monitoring wells marks a key milestone in securing a state mining permit
HIGHLIGHTS
- 10 groundwater monitoring wells successfully installed across the CSM site
- Baseline environmental and groundwater data now being collected
- Permitting is advancing on Wyoming State land, which offers a streamlined and efficient approval pathway
- Collected data will support both mine permit applications and the Pre-Feasibility Study (PFS)
- The PFS is on track for completion in late 2025
- ARR is advancing one of the largest and most strategically significant rare earth projects in the United States, underpinned by a 2.63 billion tonne JORC Resource1
DENVER, May 28, 2025 (GLOBE NEWSWIRE) -- American Rare Earths Limited (ASX: ARR | OTCQX: ARRNF | ADR: AMRRY) (“ARR” or “the Company”) is pleased to announce that groundwater monitoring wells have now been successfully installed at the Cowboy State Mine, part of the Halleck Creek Rare Earths Project in Wyoming, USA.
This represents a significant step forward in the environmental permitting process with the Wyoming Department of Environmental Quality (WDEQ), a requirement for progressing the Company’s state mining permit application. Water quality collection methods and analysis are being conducted in accordance with guidelines defined by the WDEQ.
Located on State-managed land, the Cowboy State Mine benefits from a significantly simplified permitting framework compared to projects on Federal lands. The groundwater wells will now be monitored for a full year to generate required baseline hydrological and environmental data. This data will inform groundwater modelling, mine planning, and ultimately support the formal submission of the mining permit application. Planning is also underway for 24-hour pump testing, which is a key requirement for permit approval. The testing will measure water flow, aquifer connectivity, and potential mine dewatering needs.
Chris Gibbs, CEO of American Rare Earths, said:
“The installation of these groundwater monitoring wells is an important milestone in the Cowboy State Mine permitting pathway. This work underpins our environmental approvals process and further validates our strategy of developing on State land, which is a major competitive advantage in the U.S. market. We remain on track to complete the Pre-Feasibility Study by the end of 2025, as we continue to build momentum toward our target of first production as early as 2029.”
Next Steps
- Quarterly groundwater sampling and analysis to continue throughout the 12-month monitoring period
- Completion of 24-hour pump tests to support groundwater modelling
- Formal mine permit application expected to be submitted in parallel to data collection
- CSM Pre-Feasibility Study progressing on schedule for delivery in late 2025
ARR remains focused on advancing one of the largest and most strategically significant rare earth projects in the United States, supporting the nation's efforts to develop a secure, sustainable critical minerals supply chain.
This release was authorized by the Board of American Rare Earths.
Investors can follow the Company’s progress at www.americanree.com
About American Rare Earths Limited:
American Rare Earths (ASX: ARR | OTCQX: ARRNF | ADR: AMRRY) is a critical minerals company at the forefront of reshaping the U.S. rare earths industry. Through its wholly owned subsidiary, Wyoming Rare (USA) Inc. (“WRI”), the company is advancing the Halleck Creek Project in Wyoming—a world-class rare earth deposit with the potential to secure America’s critical mineral independence for generations. Located on Wyoming State land, the Cowboy State Mine within Halleck Creek offers cost-efficient open-pit mining methods and benefits from streamlined permitting processes in this mining-friendly state.
With plans for onsite mineral processing and separation facilities, Halleck Creek is strategically positioned to reduce U.S. reliance on imports—predominantly from China—while meeting the growing demand for rare earth elements essential to defense, advanced technologies, and economic security. As exploration progresses, the project’s untapped potential on both State and Federal lands further reinforces its significance as a cornerstone of U.S. supply chain security. In addition to its resource potential, American Rare Earths is committed to environmentally responsible mining practices and continues to collaborate with U.S. Government-supported R&D programs to develop innovative extraction and processing technologies for rare earth elements. For further information contact:
| Susan Assadi Media Relations US sassadi@americanree.com 347 977 7125 | Beverly Jedynak Investor Relations US Beverly.jedynak@viriathus.com 312 943 1123 |
1 ASX Announcement – 4 February 2025
FAQ
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