- Dams, waterways, docks, and other marine construction (7)
- Caisson drilling (1)
- Dam construction (4)
- Dock construction (9)
- Drainage system construction (15)
- Dredging contractor (2)
- Harbor construction (1)
- Irrigation system construction (7)
- Marine construction (4)
- Pier construction (3)
- Pond construction (7)
- Waterway construction (2)
- Railroad and subway construction (1)
- Cutting of right-of-way (2)
- Railroad and railway roadbed construction (12)
- Athletic and recreation facilities construction (2)
- Athletic field construction (1)
- Golf course construction (7)
- Tennis court construction (3)
- Land preparation construction (23)
- Land leveling (6)
- Land reclamation (3)
- Rock removal (3)
- Timber removal (2)
- Industrial plant construction (10)
- Chemical plant and refinery construction (4)
- Oil refinery construction (14)
- Waste disposal plant construction (5)
- Waste water and sewage treatment plant construction (4)
- Blasting contractor, except building demolition (5)
- Earthmoving contractor (51)
- Land clearing contractor (16)
- Power plant construction (5)
- Trenching contractor (48)
