An EPS subsidiary, MB Kolubara plc, operates four coal mines -- the Polje B coal mine, the Polje D coal mine, the Tamnava Istok mine and the Tamnava Zapad mine.<ref>Elektroprivreda Srbije, [http://www.eps.rs/onama/mb_kolubara.htm "About Us: Basic Data:
Economic Assosiation for Coal Production, processing and Transport MB Kolubara plc"], Elektroprivreda Srbije website, accessed July 2011.</ref>
Another EPS subsidiary, OPM Kostolac, currently three open-pit mines -- the Drmno mine, the Ćirikovac mine and the Klenovnik mine -- which supply the Kostolac A and B power plants.<ref>Elektroprivreda Srbije, [http://www.eps.rs/onama/opm_kostolac.htm "About Us: Basic Data: Facilities for coal production, processing and transport OPM "Kostolac""], Elektroprivreda Srbije website, accessed July 2011.</ref>
==Contact details==