Highway, Street, and Bridge Construction, Engineering Services

Soil Preparation, Planting, and Cultivating, Highway, Street, and Bridge Construction, Drywall and Insulation Contractors, Solid Waste Collection, Other Waste Collection

Highway, Street, and Bridge Construction, Poured Concrete Foundation and Structure Contractors, Site Preparation Contractors, All Other Specialty Trade Contractors, General Freight Trucking, Local

CIVIL CONSTRUCTORS INC

Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction, Electrical Contractors, Other Building Equipment Contractors, Overhead Traveling Crane, Hoist, and Monorail System Manufacturing

New Single-Family Housing Construction (except Operative Builders), New Multifamily Housing Construction (except Operative Builders), New Housing Operative Builders, Residential Remodelers, Commercial and Institutional Building Construction

IRONHORSE, INC.

Water Supply and Irrigation Systems, Water and Sewer Line and Related Structures Construction, Plumbing, Heating, and Air-Conditioning Contractors, Building Inspection Services, Testing Laboratories

Support Activities for Oil and Gas Operations, Support Activities for Coal Mining, Support Activities for Metal Mining, Support Activities for Nonmetallic Minerals (except Fuels) Mining, Water Supply and Irrigation Systems

OCSS/IDI

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

Support Activities for Forestry, Industrial Building Construction, Commercial and Institutional Building Construction, Power and Communication Line and Related Structures Construction, Poured Concrete Foundation and Structure Contractors

Highway, Street, and Bridge Construction, All Other Specialty Trade Contractors

Commercial and Institutional Building Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction, Poured Concrete Foundation and Structure Contractors, Framing Contractors

Water Supply and Irrigation Systems, Commercial and Institutional Building Construction, Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction, Masonry Contractors

HILL MECHANICAL SERVICES, INC.

MID-WEST REGION

Highway, Street, and Bridge Construction, Other Heavy and Civil Engineering Construction, Military Armored Vehicle, Tank, and Tank Component Manufacturing, Architectural Services, Engineering Services

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

Industrial Building Construction, Commercial and Institutional Building Construction, Water and Sewer Line and Related Structures Construction, Painting and Wall Covering Contractors, Finish Carpentry Contractors