Coal producer Alpha Natural Resources says federal regulators have determined they incorrectly issued an imminent danger order at one of its Virginia mines.
Alpha revealed the situation Nov. 12 in a Securities and Exchange Commission filing. The order was issued to subsidiary Dickenson- Russell Coal on Nov. 9 by the federal Mine Safety and Health Administration.
Alpha says the agency vacated the order a day later.
Alpha says MSHA was responding to reports of popping and cracking noises and a so-called mountain bump at the working face of its Cherokee Mine in Dickenson County.
A bump is a sudden release of pressure in an underground mine.
Alpha says test drilling found no problems and showed that no imminent danger existed.
Abingdon-based Alpha operates in Appalachia, including Letcher County, and Wyoming.