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21 Mining 211 Oil and Gas Extraction 2111 Oil and Gas Extraction 21111 Oil and Gas Extraction 211111 Crude Petroleum and Natural Gas Extraction 211112 Natural Gas Liquid Extraction 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 213 Support Activities for Mining 2131 Support Activities for Mining 21311 Support Activities for Mining 213111 Drilling Oil and Gas Wells 213112 Support Activities for Oil and Gas Operations 213113 Support Activities for Coal Mining 213114 Support Activities for Metal Mining 213115 Support Activities for Nonmetallic Minerals (except Fuels) Back to Top 22 Utilities 221 Utilities 2211 Electric Power Generation, Transmission and Distribution 22111 Electric Power Generation 221111 Hydroelectric Power Generation 221112 Fossil Fuel Electric Power Generation 221113 Nuclear Electric Power Generation 221119 Other Electric Power Generation 22112 Electric Power Transmission, Control, and Distribution 221121 Electric Bulk Power Transmission and Control 221122 Electric Power Distribution 2212 Natural Gas Distribution 22121 Natural Gas Distribution 2213 Water, Sewage and Other Systems 22131 Water Supply and Irrigation Systems 22132 Sewage Treatment Facilities 22133 Steam and Air-Conditioning Supply Back to Top 23 Construction 233 Building, Developing, and General Contracting 2331 Land Subdivision and Land Development 23311 Land Subdivision and Land Development 2332 Residential Building Construction 23321 Single Family Housing Construction 23322 Multifamily Housing Construction 2333 Nonresidential Building Construction 23331 Manufacturing and Industrial Building Construction 23332 Commercial and Institutional Building Construction 234 Heavy Construction 2341 Highway, Street, Bridge, and Tunnel Construction 23411 Highway and Street Construction 23412 Bridge and Tunnel Construction 2349 Other Heavy Construction 23491 Water, Sewer, and Pipeline Construction 23492 Power and Communication Transmission Line Construction 23493 Industrial Nonbuilding Structure Construction 23499 All Other Heavy Construction 235 Special Trade Contractors 2351 Plumbing, Heating, and Air-Conditioning Contractors 23511 Plumbing, Heating, and Air-Conditioning Contractors 2352 Painting and Wall Covering Contractors 23521 Painting and Wall Covering Contractors 2353 Electrical Contractors 23531 Electrical Contractors 2354 Masonry, Drywall, Insulation, and Tile Contractors 23541 Masonry and Stone Contractors 23542 Drywall, Plastering, Acoustical, and Insulation Contractors 23543 Tile, Marble, Terrazzo, and Mosaic Contractors 2355 Carpentry and Floor Contractors 23551 Carpentry Contractors 23552 Floor Laying and Other Floor Contractors 2356 Roofing, Siding, and Sheet Metal Contractors 23561 Roofing, Siding, and Sheet Metal Contractors 2357 Concrete Contractors 23571 Concrete Contractors 2358 Water Well Drilling Contractors 23581 Water Well Drilling Contractors 2359 Other Special Trade Contractors 23591 Structural Steel Erection Contractors 23592 Glass and Glazing Contractors 23593 Excavation Contractors 23594 Wrecking and Demolition Contractors 23595 Building Equipment and Other Machinery Installation Contractors 23599 All Other Special Trade Contractors Back to Top |