- Dams, waterways, docks, and other marine construction (4)
- Dredging contractor (1)
- Irrigation system construction (1)
- Marine construction (9)
- Waterway construction (1)
- Golf course construction (3)
- Tennis court construction (4)
- Land preparation construction (9)
- Land leveling (3)
- Industrial plant construction (1)
- Chemical plant and refinery construction (1)
- Waste water and sewage treatment plant construction (2)
- Blasting contractor, except building demolition (2)
- Earthmoving contractor (4)
- Land clearing contractor (15)
- Pile driving contractor (2)
- Trenching contractor (3)
