| 31. | The deposit is currently under development by Cradle Resources to mine niobium by open pit mining methods.
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| 32. | Uranium mining declined with the last open pit mine shutting down in 1992 ( Shirley Basin, Wyoming ).
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| 33. | Uranium mining declined with the last open pit mine ( Shirley Basin, Wyoming ) shutting down in 1992.
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| 34. | The mine began operation in 1966, as an open pit mine and eventually evolved into an underground mine.
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| 35. | But police failed to hold back crowds flocking to the open pit mine in support of the strikers.
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| 36. | Jwaneng is an open pit mine.
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| 37. | In 1858, African-American miners working in open pit mines were the first to discover dinosaur fossils in Maryland.
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| 38. | San Francisco-based Homestake said it will continue processing ore from the complex's open pit mine during the shutdown.
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| 39. | In 2012, protests against the Conga open pit mine became widespread, and in July five protesters were killed.
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| 40. | Construction of an open pit mine began in May 1970 and in mid-1973 the mine was declared fully operational.
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