- Dams, waterways, docks, and other marine construction (22)
- Caisson drilling (4)
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- Dam construction (1)
- Dock construction (1)
- Drainage system construction (85)
- Dredging contractor (7)
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- Waterway construction (4)
- Railroad and subway construction (7)
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- Railroad and railway roadbed construction (24)
- Athletic and recreation facilities construction (7)
- Athletic field construction (7)
- Golf course construction (28)
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- Land leveling (9)
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- Blasting contractor, except building demolition (13)
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- Trenching contractor (101)
