Gestra Engineering, Inc.
Milwaukee,
Wisconsin
View Accreditation Certificate
Nicole
Merkes
191 West Edgerton Avenue
Milwaukee
,
Wisconsin
53207
Phone: (414) 933-7444
Fax: (414) 933-7844
nicole.merkes@gestrainc.com
https://http://www.gestrainc.com
Quality Management System - accredited since 7/13/2009
R18, C1077 (Aggregate), C1077 (Concrete), D3740 (Soil), E329 (Aggregate), E329 (Concrete)
Soil - accredited since 7/13/2009
T100, T310, T311, D421, D698, D1140, D1557, D1883, D2166, D2216, D2435, D2487, D2850, D2974, D4318, D4718, D4767, D4972, D5084, D6913, D7263, D7928
Aggregate - accredited since 1/12/2012
R76, R90, T11, T19, T21, T27, T84, T85, T103, T113, T255, T335, C29, C40, C88, C117, C123, C127, C128, C131, C136, C535, C566, C702, D4791
Concrete - accredited since 2/28/2020
M201, R39, R60, R100 (Beams), R100 (Cylinders), T22, T97, T119, T121, T152, T196, T231 (8000 psi and below), T309, C31 (Beams), C31 (Cylinders), C39, C78, C138, C143, C172, C173, C192, C231, C511, C617 (8000 psi and below), C1064, C1231 (7000 psi and below)
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 10/27/2026. Please visit https://aashtoresource.org for current accreditation status.
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