Blackhawk Mining has announced plans to idle some coal operations in southern West Virginia and permanently lay off 146 workers.
Lexington, Kentucky-based Blackhawk Mining sent layoff warning notices to the Kanawha County Commission on Monday.
The Panther Creek mine in Kanawha County was part of Blackhawk Mining's purchase through an auction of a substantial amount of bankrupt Patriot Coal's assets last year.
Blackhawk says the layoffs are expected to take place in March at Panther Creek's Winchester Underground Mine and Tom's Fork Prep Plant in Eskdale.
Other operations at Panther Creek will remain active.
Scott Depot-based Patriot filed for Chapter 11 bankruptcy protection last May.