PSC Y1LC Construction of Tunnels and Subsurface Structures

Services
Federal Category 4.2: Facilities & Construction Construction Related Services

Possible NAICS Codes
237990 – Other Heavy and Civil Engineering Construction
237110 – Water and Sewer Line and Related Structures Construction
238910 – Site Preparation Contractors
237310 – Highway, Street, and Bridge Construction
236220 – Commercial and Institutional Building Construction
238990 – All Other Specialty Trade Contractors
238110 – Poured Concrete Foundation and Structure Contractors
921110 – Executive Offices
561210 – Facilities Support Services
541360 – Geophysical Surveying and Mapping Services