BLACK HILLS NORTHWEST WYOMING GAS UTILITY CO LLC

Electrical Contractors

Construction Sand and Gravel Mining, Support Activities for Oil and Gas Operations, Natural Gas Distribution, Water Supply and Irrigation Systems, Sewage Treatment Facilities

Electric Power Distribution, New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders), Residential Remodelers, Industrial Building Construction

Sewage Treatment Facilities, Water and Sewer Line and Related Structures Construction, Oil and Gas Pipeline and Related Structures Construction, Land Subdivision, Highway, Street, and Bridge Construction

Water Supply and Irrigation Systems, Sewage Treatment Facilities, Water and Sewer Line and Related Structures Construction, Other Heavy and Civil Engineering Construction, Other Support Activities for Water Transportation

Water Supply and Irrigation Systems, Sewage Treatment Facilities, Steam and Air-Conditioning Supply, Residential Remodelers, Industrial Building Construction

Electric Power Distribution, Oil and Gas Pipeline and Related Structures Construction, Power and Communication Line and Related Structures Construction, Noncurrent-Carrying Wiring Device Manufacturing

Natural Gas Distribution, Water Supply and Irrigation Systems, Sewage Treatment Facilities, Steam and Air-Conditioning Supply, Water and Sewer Line and Related Structures Construction

Support Activities for Oil and Gas Operations, Water Supply and Irrigation Systems, Sewage Treatment Facilities, Steam and Air-Conditioning Supply, Industrial Building Construction

Support Activities for Forestry, Water Supply and Irrigation Systems, Environmental Consulting Services, Other Scientific and Technical Consulting Services, Research and Development in the Physical, Engineering, and Life Sciences

Crushed and Broken Granite Mining and Quarrying, Other Crushed and Broken Stone Mining and Quarrying, Water Supply and Irrigation Systems, Sewage Treatment Facilities, Industrial Building Construction

Water Supply and Irrigation Systems

Other Electric Power Generation

Support Activities for Oil and Gas Operations, Water Supply and Irrigation Systems, Steam and Air-Conditioning Supply

Water Supply and Irrigation Systems

Support Activities for Oil and Gas Operations, Water Supply and Irrigation Systems, Sewage Treatment Facilities, Engineering Services, Drafting Services

Support Activities for Forestry, Other Crushed and Broken Stone Mining and Quarrying, Construction Sand and Gravel Mining, Water Supply and Irrigation Systems, Sewage Treatment Facilities

Support Activities for Forestry, Other Electric Power Generation, All Other Specialty Trade Contractors, Reconstituted Wood Product Manufacturing, Ethyl Alcohol Manufacturing

Water Supply and Irrigation Systems, Oil and Gas Pipeline and Related Structures Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction, Poured Concrete Foundation and Structure Contractors

Clay and Ceramic and Refractory Minerals Mining, Water Supply and Irrigation Systems, Water and Sewer Line and Related Structures Construction, Industrial Machinery and Equipment Merchant Wholesalers

Crude Petroleum and Natural Gas Extraction, Drilling Oil and Gas Wells, Support Activities for Oil and Gas Operations, Support Activities for Coal Mining, Natural Gas Distribution

Natural Gas Distribution

Water Supply and Irrigation Systems, Engineering Services, Surveying and Mapping (except Geophysical) Services, Administrative Management and General Management Consulting Services, Environmental Consulting Services