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State Materials Laboratory

Materials Laboratory Building   
  Materials Laboratory Building

The State Materials Laboratory, which includes the Bituminous, Chemical, Physical Testing and Soil Laboratories, serves as the central testing laboratory for WSDOT. These AASHTO Accredited laboratories perform various tests to ensure the materials used meet the appropriate American Society for Testing Materials, American Association of State and Transportation Officials, or Department specifications.  

We are a part of the State Construction Office, which is part of the State Construction Division.