> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hifi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Mining & Energy

> Reference table of mining and energy industry codes and classifications.

| Industry                                                        | Code   |
| :-------------------------------------------------------------- | :----- |
| Crude Petroleum Extraction                                      | 211120 |
| Natural Gas Extraction                                          | 211130 |
| Surface Coal Mining                                             | 212114 |
| Underground Coal Mining                                         | 212115 |
| Iron Ore Mining                                                 | 212210 |
| Gold Ore And Silver Ore Mining                                  | 212220 |
| Copper Nickel Lead And Zinc Mining                              | 212230 |
| Other Metal Ore Mining                                          | 212290 |
| Dimension Stone Mining And Quarrying                            | 212311 |
| Crushed And Broken Limestone Mining And Quarrying               | 212312 |
| Crushed And Broken Granite Mining And Quarrying                 | 212313 |
| Other Crushed And Broken Stone Mining And Quarrying             | 212319 |
| Construction Sand And Gravel Mining                             | 212321 |
| Industrial Sand Mining                                          | 212322 |
| Kaolin Clay And Ceramic And Refractory Minerals Mining          | 212323 |
| Other Nonmetallic Mineral Mining And Quarrying                  | 212390 |
| Drilling Oil And Gas Wells                                      | 213111 |
| Support Activities For Oil And Gas Operations                   | 213112 |
| Support Activities For Coal Mining                              | 213113 |
| Support Activities For Metal Mining                             | 213114 |
| Support Activities For Nonmetallic Minerals Except Fuels Mining | 213115 |
| Hydroelectric Power Generation                                  | 221111 |
| Fossil Fuel Electric Power Generation                           | 221112 |
| Nuclear Electric Power Generation                               | 221113 |
| Solar Electric Power Generation                                 | 221114 |
| Wind Electric Power Generation                                  | 221115 |
| Geothermal Electric Power Generation                            | 221116 |
| Biomass Electric Power Generation                               | 221117 |
| Other Electric Power Generation                                 | 221118 |
| Electric Bulk Power Transmission And Control                    | 221121 |
| Electric Power Distribution                                     | 221122 |
| Natural Gas Distribution                                        | 221210 |
| Water Supply And Irrigation Systems                             | 221310 |
| Sewage Treatment Facilities                                     | 221320 |
| Steam And Air Conditioning Supply                               | 221330 |