Construction materials

Find approved construction materials, submit new materials for approval, or review our materials evaluation and tracking programs.

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.

Manage and maintain the Washington State Pavement Management System (WSPMS), provide structural 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.

8,683 animals crossed the Snoqualmie Pass East Project area

as recorded by WSDOT and partners in 2020 and 2021.

46% increase in Amtrak Cascades ridership to 251,000 passengers

in 2021 compared to 172,000 in 2020.

Nine wetland and stream mitigation sites across 32.7 acres added

to our monitoring program in 2021 to help offset climate change impacts.