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