- Dams, waterways, docks, and other marine construction (6)
- Caisson drilling (1)
- Dam construction (3)
- Dock construction (8)
- Drainage system construction (11)
- Dredging contractor (5)
- Irrigation system construction (9)
- Levee construction (2)
- Marine construction (1)
- Pond construction (5)
- Waterway construction (1)
- Railroad and subway construction (3)
- Cutting of right-of-way (3)
- Railroad and railway roadbed construction (6)
- Golf course construction (5)
- Tennis court construction (1)
- Land preparation construction (20)
- Land leveling (9)
- Rock removal (5)
- Timber removal (4)
- Industrial plant construction (10)
- Chemical plant and refinery construction (1)
- Oil refinery construction (3)
- Waste water and sewage treatment plant construction (9)
- Blasting contractor, except building demolition (5)
- Earthmoving contractor (21)
- Land clearing contractor (39)
- Pile driving contractor (1)
- Power plant construction (3)
- Trenching contractor (29)
