- Dams, waterways, docks, and other marine construction (1)
- Dam construction (1)
- Dredging contractor (3)
- Irrigation system construction (2)
- Marine construction (3)
- Waterway construction (1)
- Railroad and subway construction (1)
- Athletic and recreation facilities construction (2)
- Athletic field construction (2)
- Golf course construction (2)
- Tennis court construction (2)
- Land preparation construction (7)
- Land reclamation (1)
- Industrial plant construction (2)
- Chemical plant and refinery construction (1)
- Waste disposal plant construction (1)
- Waste water and sewage treatment plant construction (3)
- Blasting contractor, except building demolition (2)
- Earthmoving contractor (31)
- Land clearing contractor (3)
- Pile driving contractor (6)
- Power plant construction (1)
