- Dams, waterways, docks, and other marine construction (14)
- Caisson drilling (2)
- Canal construction (1)
- Dam construction (6)
- Drainage system construction (4)
- Dredging contractor (1)
- Irrigation system construction (9)
- Marine construction (2)
- Pond construction (4)
- Waterway construction (3)
- Railroad and subway construction (4)
- Cutting of right-of-way (1)
- Railroad and railway roadbed construction (7)
- Athletic and recreation facilities construction (1)
- Golf course construction (6)
- Tennis court construction (3)
- Land preparation construction (17)
- Land leveling (2)
- Land reclamation (4)
- Timber removal (1)
- Industrial plant construction (2)
- Chemical plant and refinery construction (1)
- Mine loading and discharging station construction (2)
- Oil refinery construction (3)
- Waste disposal plant construction (1)
- Waste water and sewage treatment plant construction (19)
- Blasting contractor, except building demolition (8)
- Earthmoving contractor (14)
- Land clearing contractor (8)
- Pile driving contractor (1)
- Power plant construction (4)
- Trenching contractor (15)
