Construction materials

Search our database containing detailed information about companies that provide aggregate for road projects. Find instructions for submitting your aggregate for approval.

Find instructions on using our construction and inspection audit system that will be used by WSDOT for all design build projects and other construction, testing and inspection processes.

Search for major construction materials used within WSDOT or have a New Product evaluated for acceptance.

Information and approvals for roadside electrical equipment used for lighting, traffic signal, and intelligent transportation systems (ITS).

Learn when a project may require a geotechnical investigation and how to request our nationally known services in geotechnical engineering and engineering geology expertise.

Submit payment for Aggregate Source Approval (ASA) and Qualified Products List (QPL) evaluations.

Materials and Fabrication Inspection staff test and approve a variety of materials for use in construction projects.

Access the Washington State Pavement Management System (WSPMS), and learn how we provide structural pavement analysis and design, and conduct pavement research.

A database of over 1,300 construction materials that have been pre-approved for use in state highway construction.

Learn which testing methods our state materials laboratory is AASHTO accredited to ensure highway construction projects conform with the approved plans and specifications, including any approved changes.

The Request for Approval of Materials (RAM) is used by contractors to request approval for materials to be used on state contracts. Find the RAM form and instructions on how to submit. 

View testing data and the Composite Pay Factor (CPF) of any contract in our computer program that statistically evaluates materials (SAM) according to the requirements of WSDOT Standard Specifications.