Founded in the 1990s, these mines are located near the Albanian border. Surface mining is employed, operating with contracting excavation and ore-stripping teams.
There are three main deposits at Kastoria, two of which are currently being mined. Due to the altitude, the Koukos mine can only be worked during summer.
There are also grinding, screening and beneficiation units.
Annual production is 250,000- 300,000 tonnes of high nickel grade ore.