| METAL
MINING 1011 Iron ores 1021 Copper ores 1031 Lead and zinc ores 1041 Gold ores 1044 Silver ores 1061 Ferroalloy ores, except vanadium 1081 Metal mining services 1094 Uranium-radium-vanadium ores 1099 Metal ores, (not elsewhere classified) COAL MINING 1221 Bituminous coal and lignite - surface 1222 Bituminous coal - underground 1231 Anthracite mining 1241 Coal mining services OIL AND GAS EXTRACTION 1311 Crude petroleum and natural gas 1321 Natural gas liquids 1381 Drilling oil and gas wells 1382 Oil and gas exploration services 1389 Oil and gas field services, (not elsewhere classified) NONMETALLIC MINERALS, EXCEPT FUELS 1411 Dimension stone 1422 Crushed and broken limestone 1423 Crushed and broken granite 1429 Crushed and broken stone, (not elsewhere classified) 1442 Construction sand and gravel 1446 Industrial sand 1455 Kaolin and ball clay 1459 Clay and related minerals, (not elsewhere classified) 1474 Potash, soda, and borate minerals 1475 Phosphate rock 1479 Chemical and fertilizer mining, (not elsewhere classified) 1481 Nonmetallic minerals services 1499 Miscellaneous nonmetallic minerals |
GENERAL
BUILDLING CONTRACTORS 1521 Single-family housing construction 1522 Residential construction, (not elsewhere classified) 1531 Operative builders 1541 Industrial buildings and warehouses 1542 Nonresidential construction, (not elsewhere classified) HEAVY CONSTRUCTION, EXCEPT BUILDING 1611 Highway and street construction 1622 Bridge, tunnel, & elevated highway 1623 Water, sewer, and utility lines 1629 Heavy construction, (not elsewhere classified) SPECIAL TRADE CONTRACTORS |