Terracon’s Seattle office provides environmental consulting, facilities services, geotechnical engineering, and materials testing and special inspections services to clients at local, regional, and national levels. While proud of our national clients, our office staffs more than 180 professionals committed to the Pacific Northwest. As an employee-owned firm, we allocate a significant portion of our operational budget on staff development and tools that enhance the client experience, while increasing the efficiency of our services. We specialize in projects large and small, public and private, as our local expertise is supported by more than 175 locations nationwide comprised of over 5,000 consultants.

  • Environmental Services
    • Due Diligence Site Assessments and Investigations
    • Phase I and II ESAs are completed in accordance to ATSM Standards
    • Remediation Design and Implementation
    • Surface Water Management; SWPPPs, NPDES, and Construction Stormwater Inspection Support
    • Regulated/Hazardous Materials Services
  • Facilities Services
    • Building Enclosure Consulting (roofs, walls, and waterproofing)
    • Energy Audits and Consulting
    • Engineering Diagnostics
    • Mechanical, Electrical, and Plumbing Consulting
  • Geotechnical Services
    • Subsurface Exploration and Testing
    • Shoring Design
    • Soil Stabilization and Ground Improvement
    • Foundation Analysis and Design
  • Materials Services
    • Construction Administration
    • Construction Monitoring
    • Material Inspections
    • Construction Materials Testing
21905 64th Ave W, Ste 100 Mountlake Terrace, WA 98043-2251
Phone: 425-771-3304
Fax: (425) 771-3549

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