Mining and Construction

The mining division includes all establishments primarily engaged in mining. The term “mining” is used in the broad sense to include the extraction of minerals occurring naturally. This includes solids, such as coal and ores; liquids, such as crude petroleum; and gases, such as natural gas. The term “mining” is also used in the broad sense to include quarrying, well operations, milling (i.e., crushing, screening, washing, and flotation), and other preparation customarily done at the mine site, or as a part of mining activity.