- Dams, waterways, docks, and other marine construction (22)
- Caisson drilling (3)
- Canal construction (1)
- Dam construction (5)
- Dock construction (13)
- Drainage system construction (28)
- Dredging contractor (11)
- Harbor construction (1)
- Irrigation system construction (31)
- Marine construction (99)
- Pier construction (5)
- Pond construction (18)
- Railroad and subway construction (5)
- Railroad and railway roadbed construction (14)
- Athletic and recreation facilities construction (5)
- Athletic field construction (4)
- Golf course construction (9)
- Tennis court construction (11)
- Land preparation construction (51)
- Land leveling (8)
- Land reclamation (8)
- Rock removal (2)
- Timber removal (5)
- Industrial plant construction (6)
- Mine loading and discharging station construction (2)
- Waste disposal plant construction (10)
- Waste water and sewage treatment plant construction (20)
- Blasting contractor, except building demolition (15)
- Earthmoving contractor (27)
- Land clearing contractor (92)
- Pile driving contractor (10)
- Power plant construction (8)
- Trenching contractor (8)
