| 31. | Each year approximately of coal are extracted from the open pit.
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| 32. | Ore was mined using conventional open pit methods until January 1995.
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| 33. | Her parents'empty room is over the open pit that is the communal toilet.
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| 34. | Behind wooden doors, open pits swarming with flies serve as toilets.
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| 35. | That waste is held in open pits, known as manure lagoons.
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| 36. | The expanded BrightStar project included a number of proposed and existing open pits.
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| 37. | The increase in open pit reserves is 2.61 million ounces.
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| 38. | Gold in Bolivia is produced mainly from open pit mine through a carbon-in-leach operation.
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| 39. | All the iron ore currently mined is from open pits.
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| 40. | The first open pit mine was located in Lac-Jeanine, Quebec.
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