Water Supply and Irrigation Systems, Sewage Treatment Facilities, Water and Sewer Line and Related Structures Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction

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

Water and Sewer Line and Related Structures Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction, Site Preparation Contractors

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

Support Activities for Metal Mining, Land Subdivision, 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

Highway, Street, and Bridge Construction

Water and Sewer Line and Related Structures Construction

Crushed and Broken Limestone Mining and Quarrying, Crushed and Broken Granite Mining and Quarrying, Construction Sand and Gravel Mining, Industrial Sand Mining, Support Activities for Coal Mining

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

Highway, Street, and Bridge Construction, Painting and Wall Covering Contractors, Other Scientific and Technical Consulting Services

Water and Sewer Line and Related Structures Construction, All Other Specialty Trade Contractors

Support Activities for Oil and Gas Operations, Support Activities for Metal Mining, Fossil Fuel Electric Power Generation, Nuclear Electric Power Generation, Other Electric Power Generation

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