Core natural resources provides update on ongoing efforts to resume longwall operations at leer south

Re-enters the mine on june 10th, consistent with previously provided timeline re-establishes ventilation, conducts a full inspection of the mine, restores hydraulic pressure along the longwall face, and confirms that key longwall components are in good condition decides to temporarily reseal the affected area of the mine on june 26th due to elevated carbon monoxide levels engages regulatory officials on a plan that is expected to facilitate the repositioning and restart of the longwall system within the next four months reiterates 2025 coking coal sales volume guidance for metallurgical segment despite delayed restart expects leer south-related insurance recoveries in excess of $100 million  canonsburg, pa. , june 30, 2025 /prnewswire/ -- today, core natural resources, inc. (nyse: cnr) ("core") provided an update on its ongoing efforts to resume longwall operations at its leer south mine following a combustion-related event at the mine in mid-january.
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