Vice President Jim Barker told local newspaper the Indiana Gazette this week that a few of its mines will remain open for maintenance projects, though he did not indicate which mines would close or remain open. The company’s three Ohio operations will continue to produce.

He said the company hopes to call the workers, which equate to about half of its total workforce, back sometime next month when stockpiles reduce.

“We would expect, based on the guidance from our customers, to start shipping again by the end of the month [January] and bring everyone back in February,” Barker told fellow regional paper the Tribune-Review.

Rosebud, which has grown significantly over the last few years via acquisition activity, employs about 850. Some of its Pennsylvania operations include Beaver Valley, Barrett, Tracy Lynne, Knob Creek, Heilwood and Dutch Run.