Water Supply and Irrigation Systems, Sewage Treatment Facilities, Steam and Air-Conditioning Supply, Fabricated Structural Metal Manufacturing, Sheet Metal Work Manufacturing

Water Supply and Irrigation Systems, Sewage Treatment Facilities, Electrical Contractors, Site Preparation Contractors, All Other Specialty Trade Contractors

Crude Petroleum and Natural Gas Extraction, Bituminous Coal and Lignite Surface Mining, Bituminous Coal Underground Mining, Anthracite Mining, Water Supply and Irrigation Systems

Water Supply and Irrigation Systems, Sewage Treatment Facilities, Industrial Valve Manufacturing, Other Metal Valve and Pipe Fitting Manufacturing, Pump and Pumping Equipment Manufacturing

Water Supply and Irrigation Systems, Sewage Treatment Facilities, Water and Sewer Line and Related Structures Construction, Land Subdivision

Sewage Treatment Facilities, Water and Sewer Line and Related Structures Construction, Janitorial Services, Other Waste Collection, Other Nonhazardous Waste Treatment and Disposal

Sewage Treatment Facilities, Industrial Building Construction, Water and Sewer Line and Related Structures Construction, Plumbing, Heating, and Air-Conditioning Contractors

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, Commercial and Institutional Building Construction, Water and Sewer Line and Related Structures Construction, Other Heavy and Civil Engineering Construction, Plumbing, Heating, and Air-Conditioning Contractors