Mines & Facilities
We currently operate ten mining complexes in two operating regions: Illinois Basin and Appalachia.
Because we produce a diverse range of steam coals with varying sulfur and heat contents, we are able to satisfy the broad range of specifications required by our customers. The coal we produced in 2015 was approximately 3.6% low-sulfur coal, 17.3% medium-sulfur coal and 79.1% high-sulfur coal. We classify low-sulfur coal as coal with a sulfur content of less than 1%, medium-sulfur coal as coal with a sulfur content of 1% to 2%, and high-sulfur coal as coal with a sulfur content of greater than 2%.