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Materials Laboratory Contacts

Physical Address
1655 S. 2nd Avenue
Tumwater, WA 98512

Mailing Address 
PO Box 47365
Olympia, WA 98504-7365

Main Telephone
360-709-5400

Main Fax
360-709-5585

Application Contacts

Qualified Product List (QPL)
(360)709-5442

Aggregate Source Approval (ASA)
(360)709-5444

Request for Approval of Material (RAM)
(360)709-5445

Record of Materials (ROM)
(360)709-5449


Laboratory Contacts

Pavement Engineering
(360)709-5485

Field Exploration
(360)709-5464

Geotechnical Services

General Questions
(360)709-5450

Geology Design, Investigation and Construction Engineering
(360)709-5450

Foundation Construction and Engineering
(360)709-5452

Materials Testing and Fabrication Inspections

General Questions
(360)709-5407

Bituminous Materials
(360)709-5424

Chemistry Laboratory
(360)709-5537

Electrical and Signing
(360)709-5424

Fabrication and Coatings
(360)905-2236


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