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

Other Electric Power Generation, Sewage Treatment Facilities

Other Crushed and Broken Stone Mining and Quarrying, Construction Sand and Gravel Mining, Sewage Treatment Facilities, Industrial Building Construction, Commercial and Institutional Building Construction

Support Activities for Oil and Gas Operations, Support Activities for Coal Mining, Support Activities for Metal Mining, Hydroelectric Power Generation, Electric Power Distribution

Sewage Treatment Facilities, Water and Sewer Line and Related Structures Construction, Site Preparation Contractors, Asphalt Paving Mixture and Block Manufacturing, Construction Machinery Manufacturing

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

Water Supply and Irrigation Systems, Sewage Treatment Facilities, Water and Sewer Line and Related Structures Construction, Site Preparation Contractors, Construction, Mining, and Forestry Machinery and Equipment Rental and Leasing

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

Sewage Treatment Facilities, Engineering Services, Environmental Consulting Services, Facilities Support Services, Professional and Management Development Training