- Dams, waterways, docks, and other marine construction (8)
- Dam construction (2)
- Dock construction (5)
- Harbor construction (1)
- Irrigation system construction (2)
- Marine construction (32)
- Railroad and subway construction (3)
- Railroad and railway roadbed construction (4)
- Tennis court construction (2)
- Land preparation construction (13)
- Land reclamation (1)
- Timber removal (8)
- Industrial plant construction (1)
- Chemical plant and refinery construction (1)
- Waste disposal plant construction (2)
- Waste water and sewage treatment plant construction (6)
- Blasting contractor, except building demolition (14)
- Earthmoving contractor (14)
- Land clearing contractor (13)
- Pile driving contractor (2)
- Power plant construction (5)
