- Dams, waterways, docks, and other marine construction (9)
- Dam construction (3)
- Drainage system construction (11)
- Dredging contractor (1)
- Irrigation system construction (14)
- Levee construction (1)
- Pier construction (2)
- Pond construction (13)
- Waterway construction (7)
- Railroad and subway construction (8)
- Railroad and railway roadbed construction (6)
- Golf course construction (5)
- Tennis court construction (5)
- Land preparation construction (12)
- Land leveling (9)
- Land reclamation (1)
- Rock removal (2)
- Timber removal (1)
- Industrial plant construction (2)
- Chemical plant and refinery construction (3)
- Oil refinery construction (4)
- Waste disposal plant construction (2)
- Waste water and sewage treatment plant construction (13)
- Blasting contractor, except building demolition (3)
- Earthmoving contractor (59)
- Land clearing contractor (15)
- Pile driving contractor (2)
- Power plant construction (1)
- Trenching contractor (92)
