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. Specialized trade activities related to water and sewer line and related structures construction are included. The construction of 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) is included in this industry.

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. Specialized trade activities related to oil and gas pipeline and related structures construction are included. The construction of structures (including buildings) that are integral parts of oil and gas networks (e.g., storage tanks, pumping stations, and refineries) is included in this industry.

This industry comprises establishments primarily engaged in the construction of power lines and towers, power plants (except hydroelectric generating facilities), and radio, television, and telecommunications transmitting and receiving towers. The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialized trade activities related to power and communication line and related structures construction are included. The construction of structures (including buildings) that are integral parts of power and communication networks (e.g., transmitting towers, substations, and power plants) is included.