Contact us

Mailing Address:
P.O. Box 2609
Clovis, CA 93613

Fresno Lab:
3109 N. Miami Ave.
Fresno, CA 93727
Ph: (559) 292-2188


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"Trinity Is The Definition Of Quality"

Trinity Engineering is committed to providing our customers the best service and quality. Trinity's labs are certified by the State of California and the AASHTO Accreditation Program. It is equipped to perform aggregate, asphalt, concrete, soil, and binder testing procedures and designs. Trinity Engineering provides materials engineering, testing, and inspection services, working closely with design professionals, contractors, government agencies, and other project team members throughout the project. Our accredited lab provides laboratory testing, which is inspected and certified regularly by State and Federal authorities.