Advancement Of Permitting At Cowboy State Mine

DENVER, CO - American Rare Earths Limited (ARR) reported 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, 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.”

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.