- Dams, waterways, docks, and other marine construction (11)
- Caisson drilling (1)
- Dam construction (6)
- Dock construction (5)
- Drainage system construction (1)
- Irrigation system construction (7)
- Pond construction (4)
- Railroad and railway roadbed construction (2)
- Athletic and recreation facilities construction (1)
- Golf course construction (6)
- Tennis court construction (3)
- Land preparation construction (15)
- Land leveling (5)
- Land reclamation (13)
- Timber removal (11)
- Industrial plant construction (4)
- Mine loading and discharging station construction (1)
- Oil refinery construction (1)
- Waste disposal plant construction (1)
- Waste water and sewage treatment plant construction (5)
- Blasting contractor, except building demolition (7)
- Earthmoving contractor (49)
- Land clearing contractor (12)
- Pile driving contractor (2)
- Power plant construction (1)
- Trenching contractor (9)
