Rio flags OT cost blowout, delays

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

Rio flags OT cost blowout, delays Rio flags OT cost blowout, delays Rio flags OT cost blowout, delays Rio flags OT cost blowout, delays Rio flags OT cost blowout, delays

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 $5.3 billion development.

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