Hidden Valley is an open-pit, gold-silver mine and processing plant in Morobe Province.
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The Porgera Gold Mine is a large gold mining operation located in Enga province.
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The Ok Tedi Mine is an open-pit copper and gold mine in Papua New Guinea located near the headwaters of the Ok Tedi River, in the Star Mountains Rural LLG of the North Fly District of the Western Province of Papua New Guinea.