Steam and Air-Conditioning Supply

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

Nursery and Tree Production, Forest Nurseries and Gathering of Forest Products, Support Activities for Oil and Gas Operations, Support Activities for Metal Mining, Support Activities for Nonmetallic Minerals (except Fuels) Mining

Natural Gas Distribution, Water Supply and Irrigation Systems, Sewage Treatment Facilities, Water and Sewer Line and Related Structures Construction, Power and Communication Line and Related Structures Construction

Fossil Fuel Electric Power Generation, Electric Power Distribution

Water Supply and Irrigation Systems, Water and Sewer Line and Related Structures Construction, Metal Tank (Heavy Gauge) Manufacturing

Other Electric Power Generation

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

Hydroelectric Power Generation, Power and Communication Line and Related Structures Construction, Mechanical Power Transmission Equipment Manufacturing, Motor Vehicle Transmission and Power Train Parts Manufacturing, Regulation and Administration of Transportation Program

Electric Power Distribution