WABO Registered Special Inspection Agencies

Click on agency name for registration information

Western Washington Locations

AAR Testing and Inspection, Inc.

Redmond, Washington

AAR Testing and Inspection, Inc.

Lacey, Washington

Columbia West Engineering, Inc.

Vancouver, Washington

Construction Testing Laboratories, Inc.

Puyallup, Washington

Fenagh Engineering and Testing

Kent, Washington

GeoTest Services, Inc.

Arlington, Washington

GeoTest Services, Inc.

Bellingham, Washington

Hayre McElroy & Associates, LLC

Redmond, Washington

Kleinfelder, Inc.

Redmond, Washington

Krazan & Associates, Inc.

Lynnwood, Washington

Krazan & Associates, Inc.

Tacoma, Washington

Materials Testing & Consulting, Inc.

Burlington, Washington

Materials Testing & Consulting, Inc.

Olympia, Washington

Mayes Testing Engineers, Inc., A Terracon Company

Lynnwood, Washington

Mayes Testing Engineers, Inc., A Terracon Company

Tacoma, Washington

O'Neill Service Group

Redmond, Washington

Otto Rosenau & Associates, Inc.

Seattle, Washington 

Professional Service Industries, Inc.

Woodinville, Washington 

Professional Service Industries, Inc.

Tacoma, Washington 
Eastern Washington & Idaho Locations

Atlas Technical Consultants

Boise, Idaho
Oregon Locations

Carlson Testing, Inc.

Tigard, Oregon 

KPFF Consulting Engineers (Inspection ONLY)

Portland, Oregon

Northwest Geotech, Inc.

Wilsonville, Oregon 

Professional Service Industries, Inc.

Portland, Oregon

Terracon Consultants, Inc. (Inspection ONLY)

Portland, Oregon
California Locations

Smith - Emery Laboratories (Inspection ONLY) 

Los Angeles, California