STM has its own 3 mining concessions. The first one is PT.CEM in which has produced for over 4years and the other 2concessions are PT Korina Jaya located in Kota Bangun(7,000 AR, 5000 ha) and PT. Alumuga located in Tabang(3,700~3,900 AR, 894ha)
One of STM’s subsidiary companies PT CMS Kaltim Utama is the coal mining contractor who can produce coal by operating and engineering skills for other mine owners. PT CMS Kaltim Utama has a lot of experences mainly in Kaltim and Currently CMS is fulfilling coal production as a contractor in CEM concession.
PT CMS Kaltim Utama also performs equipment rental business for other mining contractors or mining owners. Main rental equipments are Excavators, Dozers, Motor Graders and Compactors.
One of STM’s subsidiaries PT STM Coal Trading is doing coal trading business. Over the years STM Coal Trading has supplied coal for the international as well as domestic market.
STM’s jointed partner company PT Batu Indah Mulia is doing preparation for aggregate production and trading. The aggregate mine is located in Palu Central Sulawesi and the aggregate can be supplied to Kalimantan and Jawa area.
STM is participating in Development for Palu Special Economic Zone as an authorized agent for attracting investment from domestic & overseas investors. The president director of STM is an officially assigned representative for attraction of investment for Palu city Special Economic Zone.