Steam and Air-Conditioning Supply, Residential Remodelers, Highway, Street, and Bridge Construction, Poured Concrete Foundation and Structure Contractors, Plumbing, Heating, and Air-Conditioning Contractors

Electric Power Distribution

Fossil Fuel Electric Power Generation, Oil and Gas Pipeline and Related Structures Construction, Petroleum Refineries, Petroleum Lubricating Oil and Grease Manufacturing, Power Boiler and Heat Exchanger Manufacturing

Water Supply and Irrigation Systems, Rolled Steel Shape Manufacturing, Custom Roll Forming, Sheet Metal Work Manufacturing, Metal Tank (Heavy Gauge) Manufacturing

Other Electric Power Generation, Power and Communication Line and Related Structures Construction, Plumbing, Heating, and Air-Conditioning Contractors

Water Supply and Irrigation Systems

Other Electric Power Generation, Other Heavy and Civil Engineering Construction, Iron and Steel Pipe and Tube Manufacturing from Purchased Steel

Natural Gas Distribution, Water and Sewer Line and Related Structures Construction

Steam and Air-Conditioning Supply, New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders), New Housing Operative Builders, Residential Remodelers

Water Supply and Irrigation Systems, Steam and Air-Conditioning Supply, Water and Sewer Line and Related Structures Construction, Power and Communication Line and Related Structures Construction, Poured Concrete Foundation and Structure Contractors

Support Activities for Oil and Gas Operations

Hydroelectric Power Generation

Electric Power Distribution, Sewage Treatment Facilities

Water Supply and Irrigation Systems, Environmental Consulting Services, Hazardous Waste Collection, Hazardous Waste Treatment and Disposal, Solid Waste Landfill

Steam and Air-Conditioning Supply, Plastics Pipe and Pipe Fitting Manufacturing, Plastics Plumbing Fixture Manufacturing, Rubber and Plastics Hoses and Belting Manufacturing, Abrasive Product Manufacturing

Steam and Air-Conditioning Supply, Commercial and Institutional Building Construction, Electrical Contractors, Flooring Contractors, All Other Miscellaneous Electrical Equipment and Component Manufacturing

Hydroelectric Power Generation, Fossil Fuel Electric Power Generation, Electric Power Distribution, Natural Gas Distribution, Water Supply and Irrigation Systems

Drilling Oil and Gas Wells, Hydroelectric Power Generation, Other Electric Power Generation, Highway, Street, and Bridge Construction

Water Supply and Irrigation Systems, Sewage Treatment Facilities

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