21. He worked at the Witwatersrand Deep Mine on the Transvaal Reef for several years. 22. As with many deep mines , compressed air and electricity were supplied from the surface. 23. Many business closed as deep mining declined, and increasing numbers of houses stood vacant. 24. 250th Tunnelling Company also started the deep mine under the German positions at Spanbroekmolen. 25. Shortly after the flooding, Scottish Coal ( Deep Mine ) Limited, went into receivership. 26. This was combined with a deep mining disaster when one of the local mines collapsed. 27. There are no deep mines operating in Van Lear proper, although some mines operate nearby. 28. In December 1915, 250th Tunnelling Company began work on the deep mine at Petit Bois. 29. The deep mine , one of the last surviving in France, was closed down in 2003. 30. Most of the deep mines ceased operation by 1960.
