The Quarries Agency incorporates 12 quarries:
- Rančířov and Vanov in the Jihlava disctrict,
- Bory, Mirošov and Křoví in the Žďár nad Sázavou district,
- Královec, Vicenice and Police in the Třebíč district,
- Tasovice in the Znojmo district,
- Čenkov in the Praha-východ district,
- Císařský quarry in the Děčín district and Svržno in the Domažlice district.
Currently, the COLAS CZ, a.s. quarries produce approximately 1,700 tonnes of crushed aggregates per year.