secwatch.observer — SEC 8-K summary
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Issuer:     Core Natural Resources, Inc. (CNR)
CIK:        0001710366
Form:       8-K
Filed at:   2026-01-12T23:59:59+00:00
Accession:  0001710366-26-000002
Event type: regulatory
Sentiment:  negative
Materiality: 0.40
Item codes: 1.04
LLM model:  deepseek-v4-flash:cloud

Core Natural Resources subsidiary receives imminent danger order at Mountaineer II mine due to elevated methane
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- Mingo Logan Coal LLC received a 107(a) order on January 8, 2026 at the Mountaineer II mine in Logan County, West Virginia.
- An inspector found elevated methane levels in an isolated section; mine personnel restored acceptable levels promptly.
- The Mine Safety and Health Administration terminated the order, and no injuries or illnesses resulted.
- Core Natural Resources, Inc. (NYSE: CNR) is the parent company of Mingo Logan Coal LLC.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1710366/000171036626000002/0001710366-26-000002-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1710366/000171036626000002/cnr-20260108.htm
  HTML page:      https://secwatch.observer/filing/0001710366-26-000002

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