CGC staff has more than 45 years of collective experience in quality control and mix design testing. We were one of the first commercial laboratories in Wisconsin to purchase a gyratory compactor for testing Superpave mixtures. We have provided mix designs for private and county owned producers throughout Wisconsin. In addition, our facilities in Madison and West Allis have provided quality control or quality assurance testing for numerous projects throughout Southern Wisconsin.

Our Madison laboratory is accredited for HMA testing  by the AMRL AASHTO Materials Reference Laboratory Testing Assessment Program  and the Wisconsin Department of Transportation (WisDOT.) Our laboratory management personnel have achieved HMA MD status which is the highest hot mix asphalt testing classification within the WisDOT Certified Highway Technican Program .