SWA's approved NAICS Codes

 

  • 541330: Engineering Services
  • 541380: Geotechnical Laboratory Testing Services
  • 541511: Custom Computer Programming Services
  • 541512: Computer Systems Design Services
  • 541618: Other Management Consulting Services
  • 237110: Water, Sewer Line and Related Structures Construction
  • 237310: Highway, Street, and Bridge Construction
  • 237990: Other Heavy and Civil Engineering Construction

 

SWA also holds an American Association of State Highway and Transportation Officials (AASHTO) Accreditation.

 

  • Quality Systems - accredited since 6/14/2013 R18, C1077 (Concrete)
  • Portland Cement Concrete - accredited since 6/14/2013 C31 (Cylinders), C39, C138, C143, C172, C173, C231, C511, C617 (7000 psi and below), C1064, C1231 (7000 psi and below)

Headquarters
7055 Samuel Morse Dr., Ste. 100
Columbia, MD 21046
443-741-3500 | F: 443-741-3700

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