Water Supply and Irrigation Systems, Sewage Treatment Facilities, Steam and Air-Conditioning Supply, New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders)

Support Activities for Forestry, Water Supply and Irrigation Systems, New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders), New Housing Operative Builders

Poured Concrete Foundation and Structure Contractors

Water and Sewer Line and Related Structures Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction, Poured Concrete Foundation and Structure Contractors

Hydroelectric Power Generation, Fossil Fuel Electric Power Generation, Electric Bulk Power Transmission and Control, Electric Power Distribution, Natural Gas Distribution

Poured Concrete Foundation and Structure Contractors, Framing Contractors, Roofing Contractors, Siding Contractors, Other Foundation, Structure, and Building Exterior Contractors

Water and Sewer Line and Related Structures Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction, Poured Concrete Foundation and Structure Contractors, Structural Steel and Precast Concrete Contractors