- Dams, waterways, docks, and other marine construction (10)
- Caisson drilling (2)
- Dam construction (2)
- Dock construction (3)
- Drainage system construction (15)
- Dredging contractor (1)
- Irrigation system construction (11)
- Marine construction (31)
- Pond construction (5)
- Waterway construction (1)
- Railroad and subway construction (1)
- Railroad and railway roadbed construction (4)
- Subway construction (2)
- Golf course construction (9)
- Tennis court construction (15)
- Land preparation construction (22)
- Land leveling (4)
- Rock removal (1)
- Timber removal (1)
- Industrial plant construction (3)
- Mine loading and discharging station construction (1)
- Waste water and sewage treatment plant construction (10)
- Blasting contractor, except building demolition (31)
- Earthmoving contractor (10)
- Land clearing contractor (61)
- Pile driving contractor (3)
- Power plant construction (6)
- Trenching contractor (4)
