| 31. | The spiral linear mine is an upper surface mine.
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| 32. | He has also served as the deputy assistant director of the Office of Surface Mining.
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| 33. | The Office of Surface Mining is an Interior Department agency charged with reviewing permit applications.
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| 34. | Surface mines instead continued mining operations in the watershed.
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| 35. | But these state laws were largely unsuccessful at stemming the environmental impacts of surface mining.
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| 36. | In the United Kingdom coal is mined from 3 deep mines and 26 surface mines.
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| 37. | Office of Surface Mines has cut a monitoring trench measuring by by in the area.
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| 38. | Roman techniques were not limited to surface mining.
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| 39. | A surface mining operation was added in 1946.
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| 40. | It had long been anticipated that the recovery of diamonds by conventional surface mining would end.
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