- Dams, waterways, docks, and other marine construction (9)
- Caisson drilling (1)
- Dock construction (19)
- Drainage system construction (9)
- Dredging contractor (9)
- Irrigation system construction (14)
- Levee construction (1)
- Marine construction (36)
- Pond construction (12)
- Railroad and subway construction (2)
- Railroad and railway roadbed construction (22)
- Athletic and recreation facilities construction (3)
- Athletic field construction (1)
- Golf course construction (10)
- Tennis court construction (4)
- Land preparation construction (45)
- Land leveling (19)
- Land reclamation (6)
- Rock removal (1)
- Timber removal (10)
- Industrial plant construction (17)
- Chemical plant and refinery construction (2)
- Oil refinery construction (1)
- Waste disposal plant construction (5)
- Waste water and sewage treatment plant construction (7)
- Blasting contractor, except building demolition (10)
- Earthmoving contractor (44)
- Land clearing contractor (84)
- Pile driving contractor (18)
- Trenching contractor (11)
