Arch Coal spokeswoman Kim Link told ILN the impacted miners of Leslie, Perry and Knott counties were notified on November 7.
“There is ongoing market weakness for certain types of US thermal coal,” she said.
“We regret the need for this action, and appreciate the efforts of the employees whose positions have been affected. This was not an easy decision, but one we needed to make to respond to the current market.”
After the layoffs, the Hazard complex will operate with about 200 workers.
According to Arch’s data, the Hazard complex in Perry County and Breathitt, includes a surface and an underground mine.
The Flint Ridge mine and preparation plant, also part of the complex, closed last year.
Eastern Kentucky’s industry has taken especially hard hits over the last week, including the Arch announcement and James River Coal’s confirmation it would furlough more than 200 at its operations in Perry County.