- Dams, waterways, docks, and other marine construction (2)
- Caisson drilling (1)
- Canal construction (1)
- Dam construction (3)
- Drainage system construction (2)
- Irrigation system construction (5)
- Pond construction (2)
- Railroad and subway construction (7)
- Railroad and railway roadbed construction (2)
- Golf course construction (1)
- Land preparation construction (8)
- Land leveling (1)
- Land reclamation (15)
- Timber removal (3)
- Industrial plant construction (3)
- Mine loading and discharging station construction (1)
- Oil refinery construction (1)
- Waste water and sewage treatment plant construction (3)
- Blasting contractor, except building demolition (3)
- Earthmoving contractor (20)
- Land clearing contractor (5)
- Pile driving contractor (1)
- Power plant construction (2)
- Trenching contractor (9)
