- Dams, waterways, docks, and other marine construction (3)
- Dredging contractor (2)
- Irrigation system construction (2)
- Marine construction (2)
- Pond construction (3)
- Railroad and subway construction (3)
- Railroad and railway roadbed construction (2)
- Athletic and recreation facilities construction (2)
- Golf course construction (6)
- Tennis court construction (5)
- Land preparation construction (8)
- Land leveling (5)
- Land reclamation (7)
- Rock removal (2)
- Industrial plant construction (1)
- Chemical plant and refinery construction (1)
- Oil refinery construction (1)
- Waste disposal plant construction (1)
- Waste water and sewage treatment plant construction (4)
- Blasting contractor, except building demolition (9)
- Earthmoving contractor (15)
- Land clearing contractor (9)
- Pile driving contractor (1)
- Power plant construction (4)
- Trenching contractor (15)
