North American Industry Classification System (NAICS) 1997

• 23 - Construction
• 231 - Prime Contracting

2313 - Engineering Construction

This industry group comprises establishments primarily engaged in construction projects other than buildings. Engineering works include dams; non-building industrial works, such as refineries; highways, roads and streets; bridges; sewers; power and communications transmission lines; and similar structures and works.

Establishments providing specialized services of a type related to engineering construction, and not normally performed on buildings or building-related projects, are included.