Granite Construction Company
Olympia,
Washington
View Accreditation Certificate
Tyler
Porter
3200 113th Avenue SW
Olympia
,
Washington
98512
Phone: (360) 410-9780
Fax:
tyler.porter@gcinc.com
Quality Management System - accredited since 10/14/2015
R18, D3666 (Aggregate), D3666 (Asphalt Mixture)
Asphalt Mixture - accredited since 10/14/2015
R30, R35, R47, R97, T30, T166, T209, T269, T275, T305, T308, T312, T324, T329, T355, D979, D2041, D2726, D2950, D3203, D3549, D5444, D6307, D6390, D6925, D6931, D8225
Soil - accredited since 10/14/2015
R58, T89, T90, T99, T180, T265, D421, D698, D1557, D2216, D4318
Aggregate - accredited since 10/14/2015
R76, R90, T11, T19, T27, T37, T84, T85, T100 (Mineral Filler), T112, T176, T255, T304, T335, C29, C117, C127, C128, C136, C142, C566, C702, C1252, D75, D546, D2419, D4791, D5821
Please note that our accreditations do not include an expiration date. An accreditation only expires when the laboratory fails to comply with our accreditation requirements.
* This information is only valid as of 8/11/2026. Please visit https://aashtoresource.org for current accreditation status.
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