The news of the $86 million deal, which includes $75 million in cash and the assumption of liabilities, was tucked inside Alpha’s third-quarter earnings report on October 30.

Alpha praised the deal with Pennsylvania-based Rosebud, calling it a “well-respected regional operator” offering both geographic and transportation synergies.

The transaction is expected to close by the end of the year.

AMFIRE production through September was approximately 1.7 million tons, including 1.2 million tons of metallurgical coal. It has a total of six surface mines, six underground operations and five facilities, all in Pennsylvania.

In related news, Alpha also confirmed in the earnings release that it has pushed back its planned early 2015 permanent idling of the Emerald longwall operation in southwestern Pennsylvania to the end of next year.

“Emerald longwall mine will operate only through the second panel in district D,” officials said. “[The mine] will be conducting development work with minimal production during the first quarter of 2015, likely resulting in higher overall eastern cost of coal sales per ton during that period.”