Aggregate Source Approval
Search our database containing detailed information about companies that provide aggregate for road projects. Find instructions for submitting your aggregate for approval.
Aggregate Source Approval (ASA) database
Search the ASA database for the source(s) that meet your selection criteria. From the resulting list, choose which one you want to examine in greater detail. ASA Testing may take up to 90 days due to heavy workloads.
ASA map
Use the ASA map to manage and tracks aggregate sources in Washington.
- Locate sources on the map using the query tab or by manually searching, using latitude and longitude.
- Select the source and follow the link to that source’s on-line Aggregate Source Approval report.
Use the 'Information' tab for instructions on Navigation Tools, Coordinate Locator, Layer Controls, Attribute Table Display and Information Tools.
Submitting aggregate for approval
To initiate the submittal process, contact the ASA Engineer at ASA.
Use the WSDOT Recognized Concrete Aggregate Testing Facilities for 1 year ASR (ASTM C1293) (PDF 17KB) to locate a testing facility near you.
Slow down – lives are on the line.
In 2023, speeding continued to be a top reason for work zone crashes.
Even one life lost is too many.
Fatal work zone crashes doubled in 2023 - Washington had 10 fatal work zone crashes on state roads.
It's in EVERYONE’S best interest.
95% of people hurt in work zones are drivers, their passengers or passing pedestrians, not just our road crews.