WABO Registered Special Inspection Agencies

Click on agency name for registration information

Western Washington Locations

AAR Testing and Inspection, Inc.

Redmond, Washington

Columbia West Engineering, Inc.

Vancouver, Washington

Construction Testing Laboratories, Inc.

Puyallup, Washington

GeoTest Services, Inc.

Arlington, Washington

GeoTest Services, Inc.

Bellingham, Washington

Hayre McElroy & Associates, LLC

Redmond, Washington

King County DOT Road Services Division

Renton, Washington

Kleinfelder, Inc.

Redmond, Washington

Krazan & Associates, Inc.

Lynnwood, Washington

Krazan & Associates, Inc.

Poulsbo, 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

Mid Pac Engineering, LLC (Inspection ONLY)

Washougal, Washington

O'Neill Service Group

Bellevue, Washington

Otto Rosenau & Associates, Inc.

Seattle, Washington 

Pacific Testing & Inspection, Inc.

Centralia, Washington

Professional Service Industries, Inc.

Lynnwood, Washington 

Professional Service Industries, Inc.

Tacoma, Washington 
Eastern Washington & Idaho Locations

GeoEngineers, Inc.

Spokane, Washington 

Materials Testing & Inspection

Boise, Idaho
Oregon Locations

ACS Testing, Inc.

Tigard, Oregon 

Carlson Testing, Inc.

Tigard, Oregon 

KPFF Consulting Engineers (Inspection ONLY)

Portland, Oregon

Mayes Testing Engineers, Inc.

Portland, Oregon 

Northwest Geotech, Inc.

Wilsonville, Oregon 

Professional Service Industries, Inc.

Portland, Oregon
California Locations

Smith - Emery Laboratories

Los Angeles, California