- Dams, waterways, docks, and other marine construction (2)
- Dredging contractor (1)
- Irrigation system construction (1)
- Marine construction (2)
- Pond construction (4)
- Railroad and subway construction (1)
- Railroad and railway roadbed construction (3)
- Athletic and recreation facilities construction (1)
- Golf course construction (3)
- Tennis court construction (6)
- Land preparation construction (5)
- Land reclamation (1)
- Rock removal (1)
- Timber removal (1)
- Oil refinery construction (1)
- Waste water and sewage treatment plant construction (2)
- Blasting contractor, except building demolition (7)
- Earthmoving contractor (12)
- Land clearing contractor (8)
- Power plant construction (1)
- Trenching contractor (1)
