Archived - Standard Industrial Classification - Establishments (SIC-E) 1980

• F - Construction Industries
• 41 - Industrial and Heavy (engineering) Construction Industries
• 412 - Highway and Heavy Construction

4122 - Waterworks and Sewage Systems

Establishments primarily engaged in the construction of water mains, sewers and drains. Establishments primarily engaged in the construction of sewage treatment plants and filtration plants are classified in 4021 - Manufacturing and Light Industrial Building, construction.