| 11. | In 1899 the Rudolf shaft mine closed and, with that, the last mine was gone.
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| 12. | The Songo shaft mine operated from 1917 to 1927.
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| 13. | The mining method used in Raub is shaft mining and started at the Raub Hole.
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| 14. | Since 1956 the company had been working on plans to switch to sub-surface shaft mining.
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| 15. | The shaft mine 620 feet deep, opened in 1961 and employing around 200 people in 2010.
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| 16. | The Cliffs Shaft mine complex was listed on the National Register of Historic Places in 1992.
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| 17. | In 1865, Esmond started a gold mining company conducting deep shaft mining in the area north of Clunes.
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| 18. | The only way in and out of a shaft mine, was in the cage, cabled to the hoist.
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| 19. | It is a lament about the danger and drudgery of being a coal miner in an Appalachian shaft mine.
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| 20. | Fossils have also been found in the area deep shaft mines and in drilling core samples hundreds of feet down.
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