Steam and Air-Conditioning Supply, Industrial Building Construction, Water and Sewer Line and Related Structures Construction, Oil and Gas Pipeline and Related Structures Construction, Power and Communication Line and Related Structures Construction

New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders), Industrial Building Construction, Commercial and Institutional Building Construction, Water and Sewer Line and Related Structures Construction

Electric Power Distribution, Sewage Treatment Facilities, New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders), New Housing Operative Builders

New Single-Family Housing Construction (except Operative Builders), Residential Remodelers, Power and Communication Line and Related Structures Construction, Other Foundation, Structure, and Building Exterior Contractors, Electrical Contractors

Industrial Building Construction, Commercial and Institutional Building Construction, Power and Communication Line and Related Structures Construction, Highway, Street, and Bridge Construction, Structural Steel and Precast Concrete Contractors

Hydroelectric Power Generation, Fossil Fuel Electric Power Generation, Electric Bulk Power Transmission and Control, Electric Power Distribution, Steam and Air-Conditioning Supply

Water Supply and Irrigation Systems, Sewage Treatment Facilities, Water and Sewer Line and Related Structures Construction, Power and Communication Line and Related Structures Construction, Electrical Contractors

New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders), New Housing Operative Builders, Residential Remodelers, Industrial Building Construction

Bituminous Coal Underground Mining, Anthracite Mining, Iron Ore Mining, Gold Ore Mining, All Other Metal Ore Mining

Support Activities for Forestry, New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders), New Housing Operative Builders, Residential Remodelers

Water and Sewer Line and Related Structures Construction, Power and Communication Line and Related Structures Construction, Poured Concrete Foundation and Structure Contractors, Other Foundation, Structure, and Building Exterior Contractors, Site Preparation Contractors

Dairy Cattle and Milk Production, Crop Harvesting, Primarily by Machine, Farm Labor Contractors and Crew Leaders, Support Activities for Forestry, Construction Sand and Gravel Mining

Support Activities for Forestry, Water Supply and Irrigation Systems, Industrial Building Construction, Commercial and Institutional Building Construction, Water and Sewer Line and Related Structures Construction

Power and Communication Line and Related Structures Construction, Electrical Contractors

Oil and Gas Pipeline and Related Structures Construction, Power and Communication Line and Related Structures Construction

Nursery and Tree Production, Forest Nurseries and Gathering of Forest Products, Drilling Oil and Gas Wells, Support Activities for Oil and Gas Operations, Support Activities for Coal Mining

Power and Communication Line and Related Structures Construction, Electrical Contractors

New Multifamily Housing Construction (except Operative Builders), Residential Remodelers, Industrial Building Construction, Commercial and Institutional Building Construction, Water and Sewer Line and Related Structures Construction

Water Supply and Irrigation Systems, New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders), New Housing Operative Builders, Residential Remodelers

Power and Communication Line and Related Structures Construction, Heating Equipment (except Warm Air Furnaces) Manufacturing, Building Inspection Services, Administration of General Economic Programs