PT. Kaltara Batu Konstruksi (KBK) is a Private Limited Liability Aggregate (Rock) Mining Company incorporated in the Republic of Indonesia. KBK holds a Izin Usaha Pertambangan (Mining Business Licence-IUP) from the Indonesia Investment Coordinating Board (BKPM) which covers a total area of 40 Hectares (400,000m2) in Malinau, North Kalimantan, Indonesia.Meaning of Company name, PT. Kaltara Batu Konstruksi (KBK)Kaltara is the abbreviation for Kalimantan Utara. (in English, known as; North Kalimantan)Batu, in English means; Rock or Stone.Konstruksi, in English means; Construction.