General and special trade contractors primarily engaged in the construction of heavy projects, not elsewhere classified.
| Athletic field construction—general contractors | Lock and waterway construction—general contractors |
| Blasting, except building demolition—contractors | Marine construction—general contractors |
| Breakwater construction—general contractors | Mine loading and discharging station construction—general contractors |
| Bridle path construction—general contractors | Mining appurtenance construction—general contractors |
| Brush clearing or cutting—contractors | Missile facilities construction—general contractors |
| Caisson drilling—contractors | Nuclear reactor containment structure construction—general contractors |
| Canal construction—general contractors | Oil refinery construction—general contractors |
| Central station construction—general contractors | Oven construction for industrial plants—general contractors |
| Channel construction—general contractors | Oven construction, bakers'—general contractors |
| Channel cutoff construction—general contractors | Petrochemical plant construction—general contractors |
| Chemical complex or facilities construction—general contractors | Petroleum refinery construction—general contractors |
| Clearing of land—general contractors | Pier construction—general contractors |
| Cofferdam construction—general contractors | Pile driving—contractors |
| Coke oven construction—general contractors | Pond construction—general contractors |
| Cutting right-of-way—general contractors | Power plant construction—general contractors |
| Dam construction—general contractors | Railroad construction—general contractors |
| Dike construction—general contractors | Railway roadbed construction—general contractors |
| Discharging station construction, mine—general contractors | Reclamation projects construction—general contractors |
| Dock construction—general contractors | Reservoir construction—general contractors |
| Drainage project construction—general contractors | Revetment construction—general contractors |
| Dredging—general contractors | Rock removal, underwater—contractors |
| Earth moving, not connected with building construction—general | Sewage treatment plant construction—general contractors |
| Flood control project construction—general contractors | Ski tow erection—general contractors |
| Furnace construction for industrial plants—general contractors | Soil compacting service—contractors |
| Golf course construction—general contractors | Submarine rock removal—general contractors |
| Harbor construction—general contractors | Subway construction—general contractors |
| Hydroelectric plant construction—general contractors | Tennis court construction, outdoor—general contractors |
| Industrial incinerator construction—general contractors | Timber removal, underwater—contractors |
| Industrial plant appurtenance construction—general contractors | Tipple construction—general contractors |
| Irrigation projects construction—general contractors | Trail building—general contractors |
| Jetty construction—general contractors | Trailer camp construction—general contractors |
| Kiln construction—general contractors | Trenching—contractors |
| Land clearing—contractors | Washeries construction, mining—general contractors |
| Land drainage—contractors | Waste disposal plant construction—general contractors |
| Land leveling (irrigation)—contractors | Water power project construction—general contractors |
| Land reclamation—contractors | Water treatment plant construction—general contractors |
| Levee construction—general contractors | Waterway construction—general contractors |
| Light and power plant construction—general contractors | Wharf construction—general contractors |
| Loading station construction, mine—general contractors | |
| Codes |
Titles |
Total Marketable US Businesses |
| 16290000 | Heavy construction, nec | 2,051 |
| 16290100 | Dams, waterways, docks, and other marine construction | 482 |
| 16290101 | Caisson drilling | 65 |
| 16290102 | Canal construction | 25 |
| 16290103 | Dam construction | 75 |
| 16290104 | Dock construction | 264 |
| 16290105 | Drainage system construction | 468 |
| 16290106 | Dredging contractor | 157 |
| 16290107 | Harbor construction | 48 |
| 16290108 | Irrigation system construction | 346 |
| 16290109 | Levee construction | 50 |
| 16290110 | Marine construction | 1,598 |
| 16290111 | Pier construction | 29 |
| 16290112 | Pond construction | 240 |
| 16290113 | Waterway construction | 94 |
| 16290200 | Railroad and subway construction | 125 |
| 16290201 | Cutting of right-of-way | 44 |
| 16290202 | Railroad and railway roadbed construction | 365 |
| 16290203 | Subway construction | 10 |
| 16290300 | Athletic and recreation facilities construction | 89 |
| 16290301 | Athletic field construction | 63 |
| 16290302 | Golf course construction | 252 |
| 16290303 | Tennis court construction | 186 |
| 16290400 | Land preparation construction | 785 |
| 16290401 | Land leveling | 261 |
| 16290402 | Land reclamation | 247 |
| 16290403 | Rock removal | 58 |
| 16290404 | Timber removal | 127 |
| 16290500 | Industrial plant construction | 291 |
| 16290501 | Chemical plant and refinery construction | 75 |
| 16290502 | Mine loading and discharging station construction | 19 |
| 16290503 | Oil refinery construction | 121 |
| 16290504 | Waste disposal plant construction | 115 |
| 16290505 | Waste water and sewage treatment plant construction | 531 |
| 16299901 | Blasting contractor, except building demolition | 283 |
| 16299902 | Earthmoving contractor | 847 |
| 16299903 | Land clearing contractor | 1,316 |
| 16299904 | Pile driving contractor | 131 |
| 16299905 | Power plant construction | 208 |
| 16299906 | Trenching contractor | 644 |
