- Dams, waterways, docks, and other marine construction (2)
- Caisson drilling (1)
- Dam construction (2)
- Drainage system construction (1)
- Dredging contractor (2)
- Marine construction (3)
- Railroad and subway construction (3)
- Railroad and railway roadbed construction (3)
- Subway construction (1)
- Golf course construction (4)
- Land preparation construction (18)
- Land leveling (2)
- Land reclamation (22)
- Timber removal (1)
- Industrial plant construction (3)
- Chemical plant and refinery construction (1)
- Mine loading and discharging station construction (7)
- Waste water and sewage treatment plant construction (4)
- Blasting contractor, except building demolition (3)
- Earthmoving contractor (13)
- Land clearing contractor (12)
- Pile driving contractor (1)
- Power plant construction (3)
- Trenching contractor (3)
