Materials Laboratory Building

The State Materials Laboratory , which includes the Bituminous, Chemical, Physical Testing and Soil Laboratories, serves as the central testing laboratory for the Washington State Department of Transportation. 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 dedicated to providing materials testing and research in order to further the field of transportation and provide new and enhanced solutions for long-lasting and cost-effective design, construction and maintenance.