- Dams, waterways, docks, and other marine construction (7)
- Caisson drilling (1)
- Canal construction (3)
- Dam construction (1)
- Dredging contractor (1)
- Irrigation system construction (7)
- Pond construction (6)
- Waterway construction (2)
- Railroad and railway roadbed construction (2)
- Subway construction (1)
- Athletic and recreation facilities construction (1)
- Golf course construction (3)
- Tennis court construction (1)
- Land preparation construction (15)
- Land leveling (4)
- Land reclamation (6)
- Rock removal (4)
- Timber removal (2)
- Industrial plant construction (2)
- Oil refinery construction (7)
- Waste water and sewage treatment plant construction (5)
- Blasting contractor, except building demolition (5)
- Earthmoving contractor (29)
- Land clearing contractor (9)
- Power plant construction (3)
- Trenching contractor (14)
