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Core Natural Resources Resumes Longwall Mining Operations at Leer South

Core Natural Resources, Inc. (CNR) | Dec. 18, 2025

By Oscar Wright

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Core Natural Resources, Inc. (NYSE: CNR) announced the resumption of longwall operations at its Leer South metallurgical mine in West Virginia.

The company successfully recovered major mining equipment at Leer South and addressed the combustion-related issues that halted operations.

Core also reported improved productivity levels at the West Elk longwall mine in Colorado.

Resumption of Operations

Leer South longwall mining operations have restarted after being idle for nearly a year due to combustion-related activity.

Improved Productivity

West Elk mine in Colorado is now operating at consistent productivity levels.

Financial Outlook

Anticipated significant financial performance improvement in 2026 due to various factors, including the restart at Leer South and improved conditions at West Elk.

  • Core expects Leer South to operate efficiently and optimally in 2026, contributing to the company's overall performance.
  • The successful recovery of major equipment and sealing of affected areas demonstrate Core's commitment to safety and operational excellence.

Core Natural Resources anticipates a strong performance in 2026 with the resumption of operations at Leer South and improved productivity at West Elk, setting the company on a path for financial growth.