NAICS Code Description

237990 Other Heavy and Civil Engineering Construction

This industry comprises establishments primarily engaged in heavy and engineering construction projects (excluding highway, street, bridge, and distribution line construction). The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this group if they are engaged in activities primarily related to engineering construction projects (excluding highway, street, bridge, distribution line, oil and gas structure, and utilities building and structure construction). Construction projects involving water resources (e.g., dredging and land drainage), development of marine facilities, and projects involving open space improvement (e.g., parks and trails) are included in this industry.
Illustrative Examples:
Channel construction
Land drainage contractors
Dam construction
Marine construction
Dock construction
Microtunneling contractors
Dredging (e.g., canal, channel, ditch, waterway)
Nuclear waste disposal site construction
Earth retention system construction
Park ground and recreational open space improvement construction
Flood control project construction
Railroad construction
Golf course construction
Subway construction
Horizontal drilling (e.g., cable, pipeline, sewer installation)
Trenching, underwater
Hydroelectric generating station construction
Tunnel construction

Cross-References. Establishments primarily engaged in--

• Constructing water mains, sewers, and related structures--are classified in Industry 237110, Water and Sewer Line and Related Structures Construction;
• Constructing oil and gas pipelines and related structures--are classified in Industry 237120, Oil and Gas Pipeline and Related Structures Construction;
• Constructing power and communication transmission lines and related structures--are classified in Industry 237130, Power and Communication Line and Related Structures Construction;
• Constructing highways, streets, and bridges--are classified in Industry 237310, Highway, Street, and Bridge Construction; and
• Trenching (except underwater)--are classified in U.S. Industry 238910, Site Preparation Contractors.

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