Ombilin, known formally historically as PT Tambang Batubara Ombilin (TBO) is an open-pit coal mine near Sawahlunto, located approximately 70 kilometres northeast of Padang, West Sumatra. Production in the mine peaked in the 1950s but it was later closed. In recent times, the Chinese have invested $100 million to reopen the mine, and the China Nati...
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