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.

  1. Locate sources on the map using the query tab or by manually searching, using latitude and longitude.
  2. 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 360-709-5442. Electronic payment can be made through the Materials Evaluation Program (MEP).

Use the WSDOT Recognized Concrete Aggregate Testing Facilities for 1 year ASR (ASTM C1293) (PDF 17KB) to locate a testing facility near you.

Traction tires are a special type of tire

manufactured with at least 1/8 of an inch tread. Traction tires are usually marked with a mountain/snowflake symbol, the letters M+S or “All Season.”

Carry chains, practice before leaving

Requiring chains keeps traffic moving during storms rather than closing a pass or roadway.

Prep your car. Fill up your gas tank,

pack jumper cables, ice scraper, warm clothing, snacks and water.