CSI/NAICS Codes

Code	Description
330000	Utilities
330130	Operation and Maintenance of Sewer Utilities
330130.16	TV Inspection of Sewer Pipelines
330500	Common Work Results for Utilities
330516.13	Precast Concrete Utility Structures
330523.13	Utility Horizontal Directional Drilling
330523.16	Utility Pipe Jacking
331000	Water Utilities
331100	Water Utility Distribution Piping
331116	Site Water Utility Distribution Piping
331213	Water Service Connections
331216	Water Utility Distribution Valves
331219	Water Utility Distribution Fire Hydrants
331221*	Rolled Steel Shape Manufacturing
331233	Water Utility Metering
333000	Sanitary Sewerage Utilities
333100	Sanitary Utility Sewerage Piping
333120*	Construction Machinery Manufacturing
333200	Wastewater Utility Pumping Stations
333313	Sanitary Utility Sewerage
333400	Sanitary Utility Sewerage Force Mains
333913	Sanitary Utility Sewerage Manholes, Frames & Covers
333914	Pumps, industrial and commercial-type, general purpose, manufacturing
334000	Storm Drainage Utilities
334100	Storm Utility Drainage Piping
334200	Culverts
334213	Pipe Culverts
334216.13	Precast Concrete Culverts
334400	Storm Utility Water Drains
334416	Utility Trench Drains
334613	Foundation Drainage
334900	Storm Drainage Structures
335000	Fuel Distribution Utilities
335100	Natural-Gas Distribution
335213	Fuel-Oil Distribution
336611	Ship Building and Repairing
337173	Electrical Utility Services
337212	Custom Architectural Woodwork and Millwork Manufacturing