Core Natural Resources, Inc.
05/19/2026 | Press release | Distributed by Public on 05/19/2026 14:02
Mine Safety Disclosure (Form 8-K)
Item 1.04 Mine Safety - Reporting of Shutdowns and Patterns of Violations.
On May 13, 2026, Wolf Run Mining LLC, a subsidiary of Core Natural Resources, Inc., received an imminent danger order under section 107(a) of the Federal Mine Safety and Health Act of 1977 at the Leer South mine located in Barbour County, West Virginia. The order stated that an inspector found elevated methane concentrations in an area of the mine. The Mine Safety and Health Administration ("MSHA") terminated the 107(a) order early on May 14, 2026, and after further discussion between Leer South's mine management and MSHA, on May 18, 2026, MSHA determined that an imminent danger had never existed and the order was vacated.
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