| 11. | About 80 people worked at the coal mine and power station.
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| 12. | MSHA employs nearly one safety inspector for every four coal mines.
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| 13. | Holt stayed and looked for work in the Appalachian coal mines.
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| 14. | He likens corals around the world to canaries in coal mines.
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| 15. | Coal mining in Colorado began soon after the first settlers arrived.
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| 16. | What : Drama about the unionization of a Kentucky coal mine.
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| 17. | Operations were expanded in various areas including a coal mining property.
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| 18. | Since 1942 a second source of income has been coal mining.
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| 19. | This is the canary in the coal mine type of example,
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| 20. | That community is an impoverished Welsh coal mining village in 1911.
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