- Dams, waterways, docks, and other marine construction (9)
- Caisson drilling (1)
- Canal construction (4)
- Dam construction (3)
- Dock construction (4)
- Drainage system construction (4)
- Dredging contractor (3)
- Harbor construction (2)
- Irrigation system construction (11)
- Marine construction (8)
- Pond construction (12)
- Waterway construction (1)
- Railroad and subway construction (1)
- Athletic and recreation facilities construction (3)
- Golf course construction (7)
- Tennis court construction (3)
- Land preparation construction (13)
- Land leveling (7)
- Land reclamation (8)
- Rock removal (3)
- Timber removal (2)
- Industrial plant construction (5)
- Chemical plant and refinery construction (1)
- Mine loading and discharging station construction (1)
- Oil refinery construction (1)
- Waste water and sewage treatment plant construction (6)
- Blasting contractor, except building demolition (9)
- Earthmoving contractor (23)
- Land clearing contractor (15)
- Pile driving contractor (2)
- Power plant construction (6)
- Trenching contractor (8)
