Industrial Building Construction, Commercial and Institutional Building Construction, Power and Communication Line and Related Structures Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction

Residential Remodelers, Industrial Building Construction, Commercial and Institutional Building Construction, Water and Sewer Line and Related Structures Construction, Oil and Gas Pipeline and Related Structures Construction

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

Timber Tract Operations, Support Activities for Forestry, Construction Sand and Gravel Mining, Water Supply and Irrigation Systems, Sewage Treatment Facilities

Power and Communication Line and Related Structures Construction

Industrial Building Construction, Commercial and Institutional Building Construction, Power and Communication Line and Related Structures Construction, All Other Specialty Trade Contractors, Cellular and Other Wireless Telecommunications

Water Supply and Irrigation Systems, Sewage Treatment Facilities, Water and Sewer Line and Related Structures Construction, Power and Communication Line and Related Structures Construction, Highway, Street, and Bridge 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

Residential Remodelers, Industrial Building Construction, Commercial and Institutional Building Construction, Water and Sewer Line and Related Structures Construction, Oil and Gas Pipeline and Related Structures Construction

Timber Tract Operations, Forest Nurseries and Gathering of Forest Products, Logging, Finfish Fishing, Hunting and Trapping

class B-01

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

Power and Communication Line and Related Structures Construction, Electrical Contractors, Residential Electric Lighting Fixture Manufacturing, Wired Telecommunications Carriers, Security Systems Services (except Locksmiths)

Support Activities for Oil and Gas Operations, Support Activities for Metal Mining, Industrial Building Construction, Oil and Gas Pipeline and Related Structures Construction, Power and Communication Line and Related Structures Construction

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

Support Activities for Oil and Gas Operations, Commercial and Institutional Building Construction, Power and Communication Line and Related Structures Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction

Residential Remodelers, Commercial and Institutional Building Construction, Power and Communication Line and Related Structures Construction, Land Subdivision, Other Heavy and Civil Engineering Construction

Power and Communication Line and Related Structures Construction

Water and Sewer Line and Related Structures Construction, Power and Communication Line and Related Structures Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction

Other Electric Power Generation, Power and Communication Line and Related Structures Construction, Electrical Contractors