| 1. | This can happen in open pit mines as well as in underground mines.
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| 2. | Like the Robinson mine, it is an open pit mine and produces copper.
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| 3. | Since it is an open pit mine it would disturb the natural environment.
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| 4. | Pre-open pit mining began in 1863 by Comstock Lode miners.
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| 5. | Open Pit mining at Nchanga started in 1955, in the main Nchanga Open Pit.
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| 6. | It is also an open pit mine and produces copper.
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| 7. | The Cullinan kimberlite was discovered in 1902 and in 1903 open pit mining commenced.
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| 8. | Gold in Bolivia is produced mainly from open pit mine through a carbon-in-leach operation.
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| 9. | Open pit mining started at the Rowe mine in 1912.
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| 10. | The open pit mine has operated over historic underground gold mine workings since 1988.
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