Electric Bulk Power Transmission and Control, Electric Power Distribution, Power and Communication Line and Related Structures Construction, Electrical Contractors, Engineering Services

Crude Petroleum and Natural Gas Extraction, Natural Gas Distribution, New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders), Industrial Building Construction

Water Supply and Irrigation Systems, Sewage Treatment Facilities

Sewage Treatment Facilities

Water Supply and Irrigation Systems, Sewage Treatment Facilities, Industrial Building Construction, Commercial and Institutional Building Construction, Water and Sewer Line and Related Structures Construction

Fossil Fuel Electric Power Generation

Water Supply and Irrigation Systems, Exterminating and Pest Control Services

Nursery and Tree Production, Water Supply and Irrigation Systems, Nursery, Garden Center, and Farm Supply Stores

Farm Management Services, Other Electric Power Generation, Other Clothing Stores

Steam and Air-Conditioning Supply, Site Preparation Contractors, Recreational Goods Rental, Amusement and Theme Parks, Amusement Arcades

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

Crushed and Broken Limestone Mining and Quarrying, Construction Sand and Gravel Mining, Sewage Treatment Facilities, New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders)

Other Electric Power Generation, Water Supply and Irrigation Systems, Steam and Air-Conditioning Supply, Site Preparation Contractors, All Other Specialty Trade Contractors