Rio facing delays, higher costs at Oyu Tolgoi

Rio Tinto has warned of a cost blowout of as much as US$1.9 billion at its challenging Oyu Tolgoi underground copper expansion in Mongolia

Rio facing delays, higher costs at Oyu Tolgoi Rio facing delays, higher costs at Oyu Tolgoi Rio facing delays, higher costs at Oyu Tolgoi Rio facing delays, higher costs at Oyu Tolgoi Rio facing delays, higher costs at Oyu Tolgoi

Underground at Oyu Tolgoi in Mongolia

The company said in February challenging ground conditions required some "potentially significant" changes to the design and schedule of the US$5.3 billion development.