| 11. | The mine opened about 1889 on what had been operated as a drift mine.
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| 12. | There were two drift mines on the common, the Bower mine and the Top mine.
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| 13. | Local mines included Scatton, Avon and Dyffryn coal pits as well as numerous drift mines.
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| 14. | The drift mine was reopened in 1996 after being closed by British Coal in 1985.
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| 15. | Cynheidre was to be the site of the proposed "'Carway Fawr Drift Mine . "'
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| 16. | The mine was a drift mine, begun in 1952.
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| 17. | Though known as a center for hydraulic mining, there was also drift mining around Blue Tent.
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| 18. | The Cwm Clydach nature reserve used to be the home to the Nixon and Bell Drift mine.
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| 19. | A drift mine, it closed in 1965.
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| 20. | There was some mining in the 17th century when a drift mine was being worked at Milkwall.
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