AGG101 is a one-day certification course that certifies an individual’s ability to sample and test aggregates according to TxDOT Test Procedures and Specifications. There is no demonstration or training; individuals must come prepared to pass both a written and practical examination.

AGG101 is now a pre-requisite for Level 2.

Test Procedures covered:

Click on link to view test procedure:


AGG101 Aggregate Specialists are required to re-certify every three years by attending a one day certification course.

Specialists can re-certify up to one year prior to the expiration date. If certification expires, the specialist may not perform any AGG101 responsibilities on a TxDOT project.

Training Class

The AGG101 Training classes will be two-days in length and focus on providing a basic understanding and knowledge of the TxDOT Test Procedures and Specifications. These classes are not pre-requisites to any certification class and participants will not earn certification.

Federally Mandated Annual Proficiency

The Texas Department of Transportation requires all AGG101 Specialist to participate in an Annual Proficiency Program. Participation in this program is MANDATORY. Failure to participate will result in certification revocation.

To learn more about the proficiency program, click here.