The KBK Quarry Project (KBK) is situated in Malinau Regency, North Kalimantan Province, and is set to become a major supplier of hard aggregates in Kalimantan. Currently, the project holds approximately 72 million tonnes of mineral resources (as of JORC, 2012), with an expected increase of 50-80 million tonnes by mid-2023. We will extract the "Greywacke" rock using standard drill and blast quarrying methods. Our main goal is to ensure safe and cost-effective operations by managing risks and providing a safe working environment for our workforce. Our operations are part of a fully integrated Aggregate Business Unit, where effective planning, proper design, adherence to processes, and continuous cost optimization are essential. The longevity of this asset depends on forward planning, real-time performance analysis, cost reduction, and efficient use of capital.