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| Description of SIC Industry 4939 — Combination Utilities, Not Elsewhere Classified |
| Establishments primarily engaged in providing combinations of electric, gas, and other services, not elsewhere classified. |
| NAICS Code | North American Industry | SIC Codes | |
|---|---|---|---|
| |||
| 221111 | Hydroelectric Power Generation | ⇒ | 4911, 4931, 4939 |
| 221112 | Fossil Fuel Electric Power Generation | ⇒ | 4911, 4931, 4939 |
| 221113 | Nuclear Electric Power Generation | ⇒ | 4911, 4931, 4939 |
| 221114 | Solar Electric Power Generation | ⇒ | 4911, 4931, 4939 |
| 221115 | Wind Electric Power Generation | ⇒ | 4911, 4931, 4939 |
| 221116 | Geothermal Electric Power Generation | ⇒ | 4911, 4931, 4939 |
| 221117 | Biomass Electric Power Generation | ⇒ | 4911, 4931, 4939 |
| 221118 | Other Electric Power Generation | ⇒ | 4911, 4931, 4939 |
| 221119 | Other Electric Power Generation [2007] | ⇒ | 4911, 4931, 4939 |
| 221121 | Electric Bulk Power Transmission and Control | ⇒ | 4911, 4931, 4939 |
| 221122 | Electric Power Distribution | ⇒ | 4911, 4931, 4939 |
| 221210 | Natural Gas Distribution | ⇒ | 4923, 4924, 4925, 4931, 4932, 4939 |