| 1. | The last large nugget uncovered by placer mining was discovered in 1896.
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| 2. | The main occupation of the settlers was mica mining; later placer mining.
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| 3. | It was used as a source of water for extensive placer mining.
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| 4. | Placer mining gave out by the 1860s, replaced by hard rock mining.
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| 5. | "Dredging " is a method for placer mining below the water table.
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| 6. | Hydraulic mining became the largest-scale, and most devastating, form of placer mining.
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| 7. | The brothers tried placer mining but soon opened a trading post.
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| 8. | Even the earliest photos are about bridge construction and placer mining.
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| 9. | From Nebraska he moved to the placer mines in the Dakotas.
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| 10. | Placer mining in the area continued into the later 19th century.
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