Official definition

This industry comprises establishments primarily engaged in one or more of the following: (1) mining bituminous coal, anthracite coal, and lignite by underground mining, auger mining, strip mining, culm bank mining, and other surface mining; (2) developing coal mine sites; and (3) beneficiating (i.e., preparing) coal (e.g., cleaning, washing, screening, and sizing). Cross-References. Establishments primarily engaged in--