Industry groups
MSHA's canvass groups for the primary commodity.
| Industry group | Mines and quarries |
|---|---|
| Coal | 1,185 |
| Metal | 295 |
| Nonmetal | 902 |
| Other or not given | 230 |
| Sand and gravel | 6,162 |
| Stone | 4,301 |
Alphabetical order.
MSHA's canvass groups for the primary commodity.
| Industry group | Mines and quarries |
|---|---|
| Coal | 1,185 |
| Metal | 295 |
| Nonmetal | 902 |
| Other or not given | 230 |
| Sand and gravel | 6,162 |
| Stone | 4,301 |
Alphabetical order.