2007 NAICS Definitions
237 Heavy and Civil Engineering Construction

237 Heavy and Civil Engineering Construction

The Heavy and Civil Engineering Construction subsector comprises establishments whose primary activity is the construction of entire engineering projects (e.g., highways and dams), and specialty trade contractors, whose primary activity is the production of a specific component for such projects. Specialty trade contractors in Heavy and Civil Engineering Construction generally are performing activities that are specific to heavy and civil engineering construction projects and are not normally performed on buildings. The work performed may include new work, additions, alterations, or maintenance and repairs.

2371 Utility System Construction

This industry group comprises establishments primarily engaged in the construction of distribution lines and related buildings and structures for utilities (i.e., water, sewer, petroleum, gas, power, and communication). All structures (including buildings) that are integral parts of utility systems (e.g., storage tanks, pumping stations, power plants, and refineries) are included in this industry group.

23711 Water and Sewer Line and Related Structures Construction

See industry description for 237110 below.

237110 Water and Sewer Line and Related Structures Construction

This industry comprises establishments primarily engaged in the construction of water and sewer lines, mains, pumping stations, treatment plants, and storage tanks. 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 water, sewer line, and related structures construction. All structures (including buildings) that are integral parts of water and sewer networks (e.g., storage tanks, pumping stations, water treatment plants, and sewage treatment plants) are included in this industry.

Illustrative Examples:

Distribution line, sewer and water, construction Sewer main, pipe, and connection, construction Fire hydrant installation Storm sewer construction Irrigation systems construction Water main and line construction Pumping station, water and sewage system, construction Water system storage tank and tower construction Reservoir construction Water treatment plant construction Sewage disposal plant construction Water well drilling, digging, boring, or sinking (except water intake wells in oil and gas fields)

23712 Oil and Gas Pipeline and Related Structures Construction

See industry description for 237120 below.

237120 Oil and Gas Pipeline and Related Structures Construction

This industry comprises establishments primarily engaged in the construction of oil and gas lines, mains, refineries, and storage tanks. 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 oil and gas pipeline and related structures construction. All structures (including buildings) that are integral parts of oil and gas networks (e.g., storage tanks, pumping stations, and refineries) are included in this industry.

Illustrative Examples:

Distribution line, gas and oil, construction Oil refinery construction Gas main construction Petrochemical plant construction Gathering line, gas and oil field, construction Pumping station, gas and oil transmission, construction Natural gas pipeline construction Storage tank, natural gas or oil, tank farm or field, construction Natural gas processing plant construction

23713 Power and Communication Line and Related Structures Construction

See industry description for 237130 below.

237130 Power and Communication Line and Related Structures Construction

This industry comprises establishments primarily engaged in the construction of power lines and towers, power plants, and radio, television, and telecommunications transmitting/receiving towers. 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 power and communication line and related structures construction. All structures (including buildings) that are integral parts of power and communication networks (e.g., transmitting towers, substations, and power plants) are included.

Illustrative Examples:

Alternative energy (e.g., geothermal, ocean wave, solar, wind) structure construction Power line stringing Cellular phone tower construction Radio transmitting tower construction Co-generation plant construction Satellite receiving station construction Communication tower construction Telephone line stringing Electric light and power plant (except hydroelectric) construction Transformer station and substation, electric power, construction Electric power transmission line and tower construction Underground cable (e.g., cable television, electricity, telephone) laying Nuclear power plant construction

Cross-References. Establishments primarily engaged in--

2372 Land Subdivision

23721 Land Subdivision

See industry description for 237210 below.

237210 Land Subdivision

This industry comprises establishments primarily engaged in servicing land and subdividing real property into lots, for subsequent sale to builders. Servicing of land may include excavation work for the installation of roads and utility lines. The extent of work may vary from project to project. Land subdivision precedes building activity and the subsequent building is often residential, but may also be commercial tracts and industrial parks. These establishments may do all the work themselves or subcontract the work to others. Establishments that perform only the legal subdivision of land are not included in this industry.

Cross-References. Establishments primarily engaged in--

2373 Highway, Street, and Bridge Construction

23731 Highway, Street, and Bridge Construction

See industry description for 237310 below.

237310 Highway, Street, and Bridge Construction

This industry comprises establishments primarily engaged in the construction of highways (including elevated), streets, roads, airport runways, public sidewalks, or bridges. 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 highway, street, and bridge construction (e.g., installing guardrails on highways).

Illustrative Examples:

Airport runway construction Highway line painting Causeway construction Painting traffic lanes or parking lot lines Culverts, highway, road, and street, construction Pothole filling, highway, road, street, or bridge Elevated highway construction Resurfacing, highway, road, street, or bridge Guardrail construction Sign erection, highway, road, street, or bridge

Cross-References. Establishments primarily engaged in--

2379 Other Heavy and Civil Engineering Construction

23799 Other Heavy and Civil Engineering Construction

See industry description for 237990 below.

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--