212 Mining (except Oil and Gas)
2121 Coal Mining
- 21211 Coal Mining
- 212111 Bituminous Coal and Lignite Surface Mining
- 212112 Bituminous Coal Underground Mining
- 212113 Anthracite Mining
2122 Metal Ore Mining
- 21221 Iron Ore Mining
- 21222 Gold Ore and Silver Ore Mining
- 212221 Gold Ore Mining
- 212222 Silver Ore Mining
- 21223 Copper, Nickel, Lead, and Zinc Mining
- 212231 Lead Ore and Zinc Ore Mining
- 212234 Copper Ore and Nickel Ore Mining
- 21229 Other Metal Ore Mining
- 212291 Uranium-Radium-Vanadium Ore Mining
- 212299 All Other Metal Ore Mining
2123 Nonmetallic Mineral Mining and Quarrying
- 21231 Stone Mining and Quarrying
- 212311 Dimension Stone Mining and Quarrying
- 212312 Crushed and Broken Limestone Mining and
Quarrying
- 212313 Crushed and Broken Granite Mining and
Quarrying
- 212319 Other Crushed and Broken Stone Mining
and Quarrying
- 21232 Sand, Gravel, Clay, and Ceramic and Refractory
Minerals Mining and Quarrying
- 212321 Construction Sand and Gravel Mining
- 212322 Industrial Sand Mining
- 212324 Kaolin and Ball Clay Mining
- 212325 Clay and Ceramic and Refractory Minerals
Mining
- 21239 Other Nonmetallic Mineral Mining and Quarrying
- 212391 Potash, Soda, and Borate Mineral Mining
- 212392 Phosphate Rock Mining
- 212393 Other Chemical and Fertilizer Mineral
Mining
- 212399 All Other Nonmetallic Mineral Mining