Archived - Standard Industrial Classification - Establishments (SIC-E) 1980
- F - Construction Industries
- 41 - Industrial and Heavy (engineering) Construction Industries
- 412 - Highway and Heavy Construction
- 4121 - Highways, Streets and Bridges
- 4122 - Waterworks and Sewage Systems
- 4123 - Hydroelectric Power Plants and Related Structures(Except Transmission Lines)
- 4124 - Power and Telecommunication Transmission Lines
- 4129 - Other Heavy Construction
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