| 41. | The death of the deep mines after the Knox Mine Disaster of 1959 also diminished the town.
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| 42. | It was the last deep mine in the UK to extract coal from right under the sea.
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| 43. | Coal mining was a profitable enterprise and seven coal beds were deep mined and later strip mined.
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| 44. | There were collieries here and opencast coal sites cleared many of the deep mines in April 1958.
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| 45. | The closure of Tower saw the last of the deep mines in Wales come to an end.
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| 46. | The deep mine, one of the last surviving in France, was closed down in 2003.
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| 47. | By 1900, about 5, 000 men worked in the deep mines of George's Creek.
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| 48. | A number of deep mines were constructed throughout the area including Llay, Gresford, Bersham and Johnstown.
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| 49. | Marine was the last deep mine to work in the Ebbw valleys, it closed in March 1989.
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| 50. | Deep mining in the watershed ended in the 1950s, but strip mining continues in the 21st century.
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